JP2006012792A - Battery case and battery, and electric double layer capacitor case and electric double layer capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery or an electric double layer that can be easily connected to an external electric circuit board and does not cause the electrolyte solution to leak and deteriorate the battery performance, or damage the external electric circuit board by the leaked electrolyte solution Provide a capacitor.
A battery case and an electric double layer capacitor case include a base body 1 made of ceramics provided with a recess 1a at the center of the upper surface and a first conductor layer 1d and a second conductor layer 1e on the lower surface, The first metallized layer 1b formed on the bottom surface of the recess 1a, the second metallized layer 1c formed on the top surface of the step 1-A, the first metallized layer 1b to the first conductor layer 1d and A first connecting conductor 2b and a second connecting conductor 2c formed from the second metallized layer 1c to the second conductor layer 1e, and a protruding portion 3a that protrudes entirely toward the concave portion 1a at the center, The lid 3 is provided with a curved portion 3b provided between the outer peripheral portion joined to the base 1 around the portion 3a.
[Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a battery case and a battery used for a rechargeable battery, and an electric double layer capacitor case and an electric double layer capacitor, and more specifically, a thin battery case and battery used for a small electronic device such as a mobile phone. The present invention also relates to a case for an electric double layer capacitor and an electric double layer capacitor.

  In recent years, portable devices typified by mobile phones, portable computers, camera-integrated video tape recorders, etc. have been remarkably developed, and further miniaturization and weight reduction have been demanded. In addition, the demand for batteries as power sources for these portable devices continues to increase, and research on reducing the size and weight by increasing the energy density of the batteries is actively conducted. In particular, the lithium battery is a battery using lithium with a small atomic weight and a large ionization energy, so that it is possible to obtain a high energy density, to achieve a reduction in size and weight, and to be a battery that can be recharged more actively. It has been researched and has been used in a wide range of applications including power supplies for portable devices.

  In addition, the battery is roughly divided into a cylindrical shape and a rectangular shape, and the structure is that the positive electrode and the negative electrode are accommodated in a metal battery case can through an insulating sheet, and an electrolyte is injected into the battery case to seal it. The structure is made.

As a positive electrode of a lithium battery, for example, a metal oxide used as a positive electrode active material and a conductive material added thereto is generally used. For example, lithium cobaltate (LiCoO ₂ ) or lithium manganate (LiMn ₂ O ₄ ) is used as the positive electrode active material, and acetylene black (AB) or graphite is used as the conductive material. As the negative electrode of the battery, a lithium titanium composite oxide such as lithium titanate (Li ₄ Ti ₅ O ₁₂ ) or an active material such as graphite or amorphous carbon solidified with a resin is used.

In the lithium battery, the charge / discharge voltage of the positive electrode active material made of LiCoO ₂ or LiMn ₂ O ₄ is about 4V, while the charge / discharge voltage of the negative electrode active material made of carbon material or the like is around 0V. For this reason, a high discharge voltage of about 3.5 V is achieved by combining these positive electrode active material, negative electrode active material, and electrolytic solution.

  For the positive electrode of the battery, the conductive material is added to the active material, and a binder such as polytetrafluoroethylene or polyvinylidene fluoride is added and mixed to form a slurry, which is formed into a sheet using a well-known doctor blade method. For example, the sheet is formed by cutting into a circular shape.

  Also, the negative electrode is added to the above active material, as in the positive electrode, a binder such as polytetrafluoroethylene or polyvinylidene fluoride, mixed to form a slurry, and this is formed into a sheet using a known doctor blade method, Next, this sheet is cut into, for example, a circular shape.

  Then, the positive electrode and the negative electrode thus produced are accommodated in a battery case through an insulating sheet made of a polyolefin fiber nonwoven fabric or a polyolefin microporous film having a heat resistant temperature of about 150 ° C. between them, A battery is obtained by injecting an electrolytic solution.

  In order to further reduce the size and density of the battery thus manufactured, a coin-type battery A shown in FIG. 7 has been developed.

  In this conventional battery A, a positive electrode can 11 made of, for example, stainless steel provided with a disk-like positive electrode 11b, and an anode can 12 made of, for example, stainless steel, provided with a disk-like negative electrode 12b are impregnated with an electrolyte. A battery case structure that is placed in an opposing manner through the sheet 14, and then integrally joined so as to caulk the periphery of the positive electrode can 11 and the periphery of the negative electrode can 12 via a gasket 15 made of, for example, insulating polypropylene resin Has been. Charging / discharging in the positive electrode 11b and the negative electrode 12b is performed via an external connection terminal member attached to the positive electrode can 11 and the negative electrode can 12 (see, for example, Patent Documents 1 and 2 below).

  Further, in the electric double layer capacitor, in order to reduce the size and increase the density of the electric double layer capacitor, the first electrode can having the shape shown in FIG. A coin-type electric double layer capacitor A formed by crimping 11 and the second electrode can 12 has been developed.

The electric double layer capacitor A includes a first electrode can 11 made of, for example, stainless steel provided with a disk-shaped first electrode 11b, and a second electrode can 12 made of, for example, stainless steel provided with a second electrode 12b. With the insulating sheet 14 containing the electrolytic solution sandwiched between the first electrode 11b and the second electrode 12b, the edge of the first electrode can 11 and the edge of the second electrode can 12 Are formed by caulking and joining to each other via a gasket 15. Charging / discharging in the first electrode 11b and the second electrode 12b is performed via an external connection terminal member attached to the first electrode can 11 and the second electrode can 12 (for example, Patent Document 3 below) 4).
Japanese Unexamined Patent Publication No. 2000-106195 (page 6-12, FIG. 1) JP 2002-198019 (page 3-4, FIG. 1) Japanese Patent Laid-Open No. 2002-50551 JP 2003-100569 A

  However, the conventional battery A or the electric double layer capacitor A as shown in Patent Documents 1 to 4 is subjected to a temperature cycle test (for example, −40 ° C. to 85 ° C.) with a temperature range of hundreds of degrees over a long period of time. When exposed, for example, the gasket 15 made of polypropylene resin, the positive electrode can 11 (first electrode can 11), and the negative electrode can 12 (second electrode can 12) have a positive electrode via the gasket 15 due to a difference in thermal expansion coefficient. There may be a gap at the joint of the battery case that is caulked around the can 11 (first electrode can 11) and the negative electrode can 12 (second electrode can 12), and the electrolyte may leak out. Deterioration of the performance of A (electric double layer capacitor A), or the copper (Cu) wiring on the external electric circuit board may be corroded and disconnected due to the leaked electrolyte, or this gap Moisture from battery A (electric double layer capacity Disadvantageously degrade the performance has occurred in entering the A) inside.

  Furthermore, the conventional battery A or the electric double layer capacitor A has a high thermal conductivity because the positive electrode can 11 (first electrode can 11) and the negative electrode can 12 (second electrode can 12) are made of stainless steel. There is also a problem that the inside of A (electric double layer capacitor A) is easily affected by the external temperature, and the performance is easily deteriorated. That is, when the temperature outside the battery A (electric double layer capacitor A) rises, the electrolyte easily changes greatly following the external temperature change, and the desired performance cannot be exhibited.

  Accordingly, the present invention has been completed in view of the above-mentioned problems, and its purpose is to deteriorate the battery performance due to leakage of the electrolyte due to the formation of a gap in the joint portion of the battery case due to long-term use. The external electric circuit board is not damaged by the leaked electrolyte, and the connection to the external electric circuit board is easy, and the performance of the battery or electric double layer capacitor is hardly affected by ambient temperature changes. It is an object of the present invention to provide a battery case and battery, and an electric double layer capacitor case and electric double layer capacitor excellent in the above.

  The battery case of the present invention has a base made of ceramics in which a concave portion is formed in the center of the upper surface and the first conductor layer and the second conductor layer are provided independently on the lower surface, and a bottom surface of the concave portion. A first metallized layer formed; a second metallized layer formed on an upper surface of a step formed between an inner surface and a bottom surface of the recess; and the first conductor from the first metallized layer. A first connecting conductor formed over the layer, a second connecting conductor formed from the second metallized layer to the second conductor layer, and a lid joined so as to cover the recess. The lid body is provided with a projecting portion that protrudes entirely toward the concave portion at the center portion, and a curved portion between the outer peripheral portion joined to the base around the projecting portion. Is provided.

  The battery of the present invention is in close contact with the battery case having the above configuration, a positive electrode plate electrically connected to the first metallization layer, and an insulating sheet impregnated with an electrolyte on the upper surface of the positive electrode plate. A negative electrode plate placed so as to be electrically connected to the second metallization layer, and an upper surface of the base so that the protruding portion is in contact with the negative electrode plate and covers the concave portion And the lid body joined to each other.

  In the battery case of the present invention, a concave portion is formed in the central portion of the upper surface, and a base body made of ceramics in which the first conductor layer and the second conductive layer are provided independently on the lower surface, and the concave portion A first metallization layer formed on the bottom surface, a second metallization layer formed around the recess on the top surface of the base, and a first metallization layer formed from the first metallization layer to the first conductor layer. One connection conductor, a second connection conductor formed from the second metallization layer to the second conductor layer, and joined so as to cover the recess, and at least the lower main surface is conductive. The lid body is provided with a projecting portion projecting entirely toward the concave portion at the center portion, and an outer peripheral portion joined to the base body around the projecting portion; There must be a curved part between It is an feature.

  The battery according to the present invention includes a battery case having the above configuration, a positive electrode plate electrically connected to the first metallization layer, and an insulating sheet impregnated with an electrolytic solution on the upper surface of the positive electrode plate. A negative electrode plate placed so as to be in close contact with the upper surface of the base body so as to cover the recess, and the protruding portion is in contact with and electrically connected to the negative electrode plate. And a lid that is joined to and electrically connected to the second metallization layer.

  The battery case of the present invention includes a base made of ceramics having a recess formed in the center of the upper surface and a first conductor layer provided on the lower surface, and a first metallized layer formed on the bottom of the recess. And a first connection conductor formed from the first metallization layer to the first conductor layer, and a lid made of a conductive member that is joined so as to cover the recess. The lid body is provided with a projecting portion that protrudes entirely toward the concave portion at the center, and a curved portion is provided between the outer peripheral portion joined to the base around the projecting portion. It is characterized by this.

  The battery of the present invention is in close contact with the battery case having the above-described configuration, the positive electrode plate connected to the first metallization layer, and the upper surface of the positive electrode plate via an insulating sheet impregnated with an electrolyte. The negative electrode plate placed in such a manner, and the lid body joined to the upper surface of the base body so as to cover the concave portion, and the protruding portion is in contact with and electrically connected to the negative electrode plate; It is characterized by comprising.

  The electric double layer capacitor case of the present invention has a base made of ceramics, in which a recess is formed in the center of the upper surface, and a first conductor layer and a second conductor layer are provided independently on the lower surface, and the recess A first metallization layer formed on the bottom surface of the recess, a second metallization layer formed on the top surface of the step formed between the inner surface and the bottom surface of the recess, and the first metallization layer from the first metallization layer. A first connection conductor formed over one conductor layer, a second connection conductor formed from the second metallization layer to the second conductor layer, and a lid joined so as to cover the recess The lid body is provided with a projecting portion projecting entirely toward the concave portion at the center portion, and between the outer peripheral portion joined to the base body around the projecting portion. Is provided with a curved portion. .

  The electric double layer capacitor of the present invention includes an electric double layer capacitor case having the above structure, a first electrode electrically connected to the first metallization layer, and an electrolyte on the upper surface of the first electrode. A second electrode that is placed in close contact with the impregnated insulating sheet and is electrically connected to the second metallization layer, and the protrusion is brought into contact with the second electrode and the second electrode And a lid joined so as to cover the recess.

  The electric double layer capacitor case of the present invention has a base made of ceramics, in which a recess is formed in the center of the upper surface, and a first conductor layer and a second conductor layer are provided independently on the lower surface, and the recess The first metallization layer formed on the bottom surface of the substrate, the second metallization layer formed around the recess on the top surface of the substrate, and formed from the first metallization layer to the first conductor layer. The first connecting conductor is joined to the second connecting conductor formed from the second metallized layer to the second conductor layer so as to cover the recess, and at least the lower main surface is conductive. The lid body is provided with a projecting portion that protrudes entirely toward the concave portion at the center, and an outer periphery that is joined to the base body around the projecting portion. A curved part is provided between And wherein the are.

  The electric double layer capacitor of the present invention includes an electric double layer capacitor case having the above structure, a first electrode electrically connected to the first metallization layer, and an electrolyte on the upper surface of the first electrode. A second electrode placed so as to be in close contact with the impregnated insulating sheet is bonded to the upper surface of the base so as to cover the concave portion, and the protruding portion is brought into contact with the second electrode. The lid body is electrically connected and has an outer peripheral portion joined to and electrically connected to the second metallized layer.

  The case for the electric double layer capacitor of the present invention has a base made of ceramics having a recess formed in the center of the upper surface and a first conductor layer on the lower surface, and a first metallization formed on the bottom of the recess. A first connecting conductor formed from the first metallized layer to the first conductor layer, and a lid made of a conductive member that is joined so as to cover the recess. The lid body is provided with a protruding portion that protrudes entirely toward the concave portion at the center portion, and a curved portion is provided between the outer peripheral portion joined to the base body around the protruding portion. It is characterized by.

  The electric double layer capacitor of the present invention includes an electric double layer capacitor case configured as described above, a first electrode connected to the first metallization layer, and an insulating surface in which an electrolyte is impregnated on the upper surface of the first electrode. A second electrode placed in close contact with the sheet, and joined to the upper surface of the base so as to cover the recess, and the protruding portion is in contact with the negative electrode plate to electrically And the connected lid.

  The battery case or the electric double layer capacitor case of the present invention is a substrate made of ceramics having a recess formed in the center of the upper surface and the first conductor layer and the second conductor layer provided independently on the lower surface. A first metallization layer formed on the bottom surface of the recess, a second metallization layer formed on the top surface of the step formed between the inner side surface and the bottom surface of the recess, and a first metallization layer A first connecting conductor formed over one conductor layer, a second connecting conductor formed from the second metallized layer to the second conductor layer, and a lid joined so as to cover the recess. The lid body is provided with a protruding portion that protrudes entirely toward the concave portion at the center portion, and a curved portion is provided between the outer peripheral portion joined to the base body around the protruding portion. Therefore, the electrolyte is excellent in airtightness Will be accommodated by the base made of ceramics having excellent heat resistance, can be satisfactorily accommodate the electrolyte solution, it does not leak electrolyte occurs gap even when exposed to temperature cycling test. Moreover, since airtightness is maintained, it is possible to effectively prevent moisture, oxygen, and the like that deteriorate the performance of the battery or the electric double layer capacitor from entering the electrolyte from the outside.

  In addition, a substrate made of ceramics is not easily attacked by an organic solvent or an acidic or alkaline electrolytic solution, and impurities dissolved from the substrate are not mixed in the electrolytic solution, so that the electrolytic solution is not deteriorated. For this reason, the performance of a battery or an electric double layer capacitor can be maintained satisfactorily.

  Furthermore, since a portion that is caulked through a resin as in the prior art is not required, the outer shape can be reduced to the limit, which is suitable for recent miniaturization.

  Furthermore, the protruding portion at the center of the lid can be pressed against the contents such as an electrode plate housed therein and pressed from above, and these can be prevented from shifting laterally. In addition, since the lid is formed with a curved portion, the lid can be easily elastically deformed in the vertical direction. Can be fixed by pressing from above.

  In addition, since the first conductor layer and the second conductor layer are provided on the lower surface of the base, the first and second conductor layers are joined to the wiring conductor on the surface of the external electric circuit board via solder. As a result, the wiring conductor of the flat external electric circuit board and the battery or the electric double layer capacitor can be easily connected, so that the mass productivity of the external electric circuit board is extremely excellent.

  The battery of the present invention is in close contact with the battery case having the above configuration, the positive electrode plate electrically connected to the first metallization layer, and the upper surface of the positive electrode plate via an insulating sheet impregnated with an electrolyte. A negative electrode plate mounted on the second metallization layer and electrically connected to the second metallization layer, and a lid joined to the upper surface of the base so that the protruding portion abuts the negative electrode plate and covers the concave portion Therefore, the airtight reliability using the battery case having the above structure is high, and the mass productivity is excellent. In addition, desired battery performance can be exhibited, reliability is high, and charging and discharging can be performed stably over a long period of time.

  The electric double layer capacitor of the present invention has an electric double layer capacitor case configured as described above, a first electrode electrically connected to the first metallization layer, and an upper surface of the first electrode impregnated with an electrolyte. The second electrode placed in close contact with the insulating sheet and electrically connected to the second metallization layer, and the projecting portion abutting against the second electrode and covering the recess By providing the bonded lid body, the airtight reliability using the electric double layer capacitor case having the above-described configuration is high, and the mass productivity is excellent. Moreover, desired electric double layer capacitor performance can be exhibited, reliability is high, and charging and discharging can be performed stably over a long period of time.

  Further, according to another battery case or electric double layer capacitor case of the present invention, since the second metallized layer formed around the concave portion on the upper surface of the substrate is provided, Since the formation of the step formed between the bottom surface and the bottom surface can be omitted, the inside of the recess can be used widely and effectively, and the outer shape of the battery case or the electric double layer capacitor case can be reduced in size.

  Further, according to another battery of the present invention, the projecting portion having a large area of the lower main surface of the lid body in which at least the lower main surface is conductive is brought into contact with the negative electrode plate to be electrically connected. The outer peripheral portion is joined and electrically connected to the second metallization layer, so that the resistance between the negative electrode plate and the lid can be reduced, and between the negative electrode plate and the lid. Therefore, it is possible to efficiently charge and discharge without generating an electrical loss, so that the electrical characteristics can be improved.

  Further, according to another electric double layer capacitor of the present invention, the projecting portion having a large area of the lower main surface of the lid body at least having the lower main surface conductive is brought into contact with the second electrode. By being electrically connected and the outer peripheral portion being joined and electrically connected to the second metallization layer, the resistance between the second electrode and the lid can be reduced, and the second electrode Since it is possible to charge and discharge efficiently without generating an electrical loss between the lid and the lid, the electrical characteristics can be improved.

  Further, according to another battery case or electric double layer capacitor case of the present invention, the lid body is joined so as to cover the concave portion and includes a lid body made of a conductive member. It can be used together with the plate, and the formation of the step formed between the inner surface and the bottom surface of the recess, the second metallized layer, the second conductor layer, and the second connection conductor can be omitted, The size can be reduced and the manufacturing process of the substrate can be simplified, which can be suitable for mass production.

  Furthermore, according to another battery of the present invention, the lid is formed of a conductive member that is joined to the upper surface of the base so as to cover the concave portion and the protruding portion is in contact with the negative electrode plate and electrically connected thereto. Since the protrusion having a large area on the lower main surface of the lid body is in contact with and electrically connected to the negative electrode plate, the resistance between the negative electrode plate and the lid body Since it can be charged and discharged efficiently without causing electrical loss between the negative electrode plate and the lid, the electrical characteristics can be improved and the lid can be projected. Since the curved part is provided between the outer peripheral part joined to the base body around the part, the lid body can be easily elastically deformed in the vertical direction, and the thickness variation of the battery element inside the battery can be absorbed and the lid body. Can function as the negative electrode of the battery The terminal members by connected so as to sandwich from above and below of the battery, and that can be connected to the external connection terminal member.

  Further, according to another electric double layer capacitor of the present invention, the conductive member joined to the upper surface of the base so as to cover the concave portion and the protruding portion is in contact with and electrically connected to the second electrode Since the projecting portion having a large area on the lower main surface of the lid body is brought into contact with and electrically connected to the second electrode, the lid and the lid are formed. Because it can reduce the resistance between the body and efficiently charge / discharge without causing electrical loss between the second electrode and the lid body, it has excellent electrical characteristics. In addition, since the curved portion is provided between the protruding portion of the lid and the outer peripheral portion joined to the base body, the lid is easily elastically deformed in the vertical direction, and the electric power inside the electric double layer capacitor is easily Absorb the thickness variation of double layer capacitor elements It can function the lid as a current collector plate of the electric double layer capacitor, by connecting so as to sandwich the external connection terminal members from the top and bottom of the electric double layer capacitor, and which can be connected to the external connection terminal member.

  The battery case or electric double layer capacitor case of the present invention will be described in detail below. 1, (a) is a cross-sectional view showing an example of an embodiment of a battery case or an electric double layer capacitor case of the present invention, and (b) is a battery case or electric double layer capacitor of (a). The top view of a case is shown. Since the battery case and the electric double layer capacitor case of the present invention have the same configuration, the battery case will be described below as an example.

  The battery case according to the present invention has a rectangular parallelepiped, prismatic or cylindrical recess 1a formed at the center of the upper surface, and a first conductor layer 1d and a second conductor layer 1e provided independently on the lower surface. The first base 1 made of ceramic, the first metallized layer 1b formed on the bottom surface of the recess 1a, and the first surface formed on the top surface of the step 1-A formed between the inner surface and the bottom surface of the recess 1a. A second metallized layer 1c, a first connecting conductor 2b formed from the first metallized layer 1b to the first conductor layer 1d, and a second metallized layer 1c formed from the second metallized layer 1c to the second conductor layer 1e. A second connecting conductor 2c and a lid 3 that is joined so as to cover the recess 1a. The lid 3 is provided with a protruding portion 3a that protrudes entirely toward the recess 1a at the center. And contact with the base 1 around the protrusion 3a. Bending portion 3b is provided between the outer peripheral portion to be.

  FIG. 4 shows an example of an embodiment of the battery of the present invention using the battery case of FIG. 1, and parts common to those in FIG. B-1 is a positive electrode plate electrically connected to the first metallized layer 1b, and B-2 is an insulating sheet B-3 impregnated with electrolyte B-4 on the upper surface of the positive electrode plate B-1. 2 shows a negative electrode plate that is placed in close contact with each other and electrically connected to the second metallized layer 1c.

  In FIG. 1, a first metallized layer 1b is formed on the bottom surface of the recess 1a of the substrate 1, and a step 1-A is formed between the inner surface and the bottom surface of the recess 1a. The second metallized layer 1 c is formed, and the first and second conductor layers 1 d and 1 e are formed on the lower surface of the substrate 1. In FIG. 1B, the first metallized layer 1b and the second metallized layer 1c are cross-hatched. However, this is for easy understanding of the drawing and does not show a cross section. .

  Since the first and second conductor layers 1d and 1e are formed and provided on the lower surface of the base 1, the first and second conductor layers 1d and 1e are soldered to the wiring conductor on the surface of the external electric circuit board. By joining via, the wiring conductor of the flat external electric circuit board and the battery can be easily connected, so that the mass productivity of the external electric circuit board is improved.

Such a base | substrate 1 consists of ceramics, such as an alumina sintered body, an aluminum nitride sintered body, a mullite sintered body, and is produced as follows. For example, when the substrate 1 is made of an alumina sintered body, an organic binder suitable for a raw material powder such as aluminum oxide (Al ₂ O ₃ ), silicon oxide (SiO ₂ ), magnesium oxide (MgO), calcium oxide (CaO), etc. Add a solvent and mix to form a slurry. This slurry is formed into a green sheet by a doctor blade method or a calender roll method and cut into a required size. Next, in order to form the recess 1a, the step 1-A, etc. in a plurality of green sheets selected from them, an appropriate punching process is performed.

  Then, a metal paste mainly composed of a metal powder such as tungsten (W) is printed and applied to these green sheets to form a first metallized layer 1b, a first connection conductor 2b, a first conductor layer 1d, and a second. A printed pattern to be a conductor layer such as the metallized layer 1c, the second connecting conductor 2c, and the second conductor layer 1e is formed, and a printed pattern is also formed on the upper surface of the substrate 1 as necessary for brazing or the like. Then, the green sheets on which these printed patterns are formed are stacked and fired at a temperature of about 1600 ° C., thereby producing the substrate 1 having a conductor layer.

  The first conductor layer 1d is electrically connected to the first metallization layer 1b via the first connection conductor 2b, and the second conductor layer 1e is second metallization via the second connection conductor 2c. It is electrically connected to the layer 1c. The first conductor layer 1d is used as the positive electrode of the battery, and the second conductor layer 1e is used as the negative electrode. The first conductor layer 1d and the second conductor layer 1e are joined to the wiring conductor on the surface of the external electric circuit board via solder, whereby the battery is electrically connected to the external electric circuit.

  In FIG. 1, the first connection conductor 2 b and the second connection conductor 2 c are shown as examples of through conductors that penetrate through the inside of the base 1. A first connection conductor 2b that is led out from 1b to the side surface of the substrate 1 and connected to the first conductor layer 1d through a side conductor formed on the side surface of the substrate 1 is used. The second metallized layer 1c is also a second metallization layer 1c. Alternatively, the second connection conductor 2c may be led out from the metallized layer 1c to the side surface of the substrate 1 and connected to the second conductor layer 1e via another side conductor formed on the side surface of the substrate 1.

  Further, the exposed surfaces of these conductor layers formed on the substrate 1 thus manufactured have a metal excellent in corrosion resistance and wettability with solder, specifically nickel (thickness 1 to 12 μm). A Ni) layer and a gold (Au) layer having a thickness of 0.3 to 5 μm are preferably sequentially deposited by a plating method or the like. Thereby, it can suppress effectively that the metal component of the 1st metallization layer 1b and the 2nd metallization layer 1c which were especially formed inside the case for batteries is easily eluted by the voltage by charging / discharging. In addition, the first and second conductor layers 1d and 1e have better wettability with solder, and the bonding strength with the wiring conductor on the external electric circuit board through the solder becomes stronger.

  If the thickness of the Ni layer is less than 1 μm, it becomes difficult to prevent the oxidative corrosion of each conductor made of the metallized layer and to effectively prevent the metal component from eluting from the conductor, and the battery performance deteriorates. It becomes easy to do. On the other hand, if the thickness of the Ni layer exceeds 12 μm, it takes a long time to form the plating, so that the mass productivity is likely to be lowered and the electric resistance is likely to be increased.

  Further, if the thickness of the Au layer is less than 0.3 μm, it is difficult to form an Au layer having a uniform thickness, and a portion where the Au layer is extremely thin or a portion where the Au layer is not formed is likely to occur. The effect of preventing oxidative corrosion and the wettability with solder are likely to decrease. If the thickness of the Au layer exceeds 5 μm, it takes a lot of time to form the plating, and the mass productivity tends to decrease.

  The substrate 1 made of ceramics is not easily attacked by an organic solvent or acidic or alkaline electrolytic solution B-4, and therefore, impurities dissolved from the substrate 1 are mixed in the electrolytic solution B-4 and the electrolytic solution B-4 is mixed. There is no deterioration. For this reason, the battery case which can maintain battery performance favorably can be obtained.

  Preferably, the cross-sectional area of the second connection conductor 2c is larger than the cross-sectional area of the first connection conductor 2b, so that the resistance value of the first connection conductor 2b and the resistance value of the second connection conductor 2c are reduced. You can also get closer. Further, the first connection conductor 2b and the second connection conductor 2c may each be composed of a plurality of conductors.

  The first and second connection conductors 2b and 2c are shown in FIG. 1 as a single interlayer connection conductor (penetrating conductor) that extends vertically to the first and second conductor layers 1d and 1e, respectively. However, the first and second conductor layers 1d and 1e formed on the lower surface of the substrate 1 may be formed by combining a plurality of internal wiring layers in the direction parallel to the vertical interlayer connection conductors. An electric circuit can be routed in the base 1, and the first and second conductor layers 1d and 1e can be formed at desired positions on the base 1.

  Further, the upper surface of the substrate 1 has elasticity such as metal (resin) such as aluminum (Al), copper (Cu), carbon (C), iron (Fe) -Ni-cobalt (Co) alloy, Fe-Ni alloy. The lid 3 made of a certain member is joined by a method such as brazing using Al brazing, silver (Ag) brazing, Au-tin (Sn) soldering, bonding using a resin adhesive or the like.

  The lid 3 is provided with a protruding portion 3a that protrudes entirely toward the concave portion 1a at the center, and the curved portion 3b surrounds the protruding portion 3a between the outer peripheral portion joined to the base 1 around the protruding portion 3a. It is provided as follows. Thereby, the protrusion part 3a of the center part of the cover body 3 can be contact | abutted and pressed from battery elements, such as an electrode plate accommodated in the inside of a battery case, and these battery elements shift | deviate laterally. Can be prevented. Further, since the lid 3 is formed with the curved portion 3b, the lid 3 can be easily elastically deformed in the vertical direction, and even if there is a variation in the thickness of the whole battery element or the uneven portion, The element can be securely pressed from above.

  In addition, since the deformation of the lid 3 by pressing the battery element from above is absorbed by the curved portion 3b, the lower surface of the protruding portion 3a can be easily brought into contact with the battery element by the surface, and the lid 3 and the battery The resistance between the element and the element can be reduced, and a force to be peeled off from the recess 1a side is hardly applied to the joint part of the peripheral part of the lid body 3 with the base body 1, and the joint of the lid body 3 and the base body 1 is prevented. The property can also be improved.

  Here, the curved portion 3b may be formed to be curved toward the concave portion 1a or may be formed to be curved so as to protrude to the opposite side of the concave portion 1a. The battery element can be pressed and fixed from above. However, when the curved portion 3b is formed to be curved so as to protrude to the opposite side of the concave portion 1a, the curved portion 3b protrudes above the lid 3 and the overall height of the battery is increased. As it becomes unsuitable for the recent trend of downsizing and the curved portion 3b protruding above the lid 3 may become an obstacle when mounted on the external electric circuit board, as shown in FIG. The curved portion 3b is preferably formed so as to be curved and project from the protruding portion 3a to the concave portion 1a side in an S-shape, and the curved portion 3b surrounds the protruding portion 3a. That is, the protruding portion 3 a and the curved portion 3 b do not protrude above the outer peripheral portion of the upper surface of the lid 3.

  When the lid 3 is made of metal, the lid 3 is formed by subjecting a metal plate to be the lid 3 to a conventionally known press process, or by performing a conventionally known etching process to the metal plate to be the lid 3. May be. As a method of etching the lid 3, etching may be performed alternately from the lower surface side and the upper surface side to form the first curved portion 3 a and the second curved portion 3 b.

  Further, when the lid 3 is made of a metal such as Cu, Fe—Ni—Co alloy, Fe—Ni alloy and the like that is easily affected by the electrolyte B-4, the electrolyte B-4 such as Al is formed on the lower main surface thereof. What is necessary is just to deposit the material which is hard to be attacked by 0.1 to 1 micrometer in thickness by vapor deposition methods, such as sputtering. When the lid 3 is made of metal, it has elasticity over a long period of time, so that the battery element can be kept firmly pressed down over a long period of time, and a battery that operates extremely normally and stably over a long period of time can be obtained.

  Moreover, when the cover body 3 consists of resin, it forms in a predetermined shape by injection-molding in a metal mold | die. When the lid 3 is made of resin, for example, epoxy resin, polyphenylene sulfite (PPS), liquid crystal polymer (LCP), or the like can be used. When the lid 3 is made of a resin, it can be manufactured efficiently and in large quantities by injection molding into a mold, and can be extremely excellent in mass productivity. 4 is a material that is not easily attacked by the battery 4, so that the battery can operate normally and stably over a long period of time.

  Preferably, the thickness of the lid 3 excluding the protruding portion 3a and the curved portion 3b is t, and the thickness including the protruding portion 3a and the curved portion 3b of the lid 3 is T. T should be 1.3 × t ≦ T ≦ 1.7 × t. With this configuration, the lid 3 can be easily elastically deformed moderately in the vertical direction, and the battery element can be reliably pressed and fixed from above even if the overall thickness of the battery element varies. When T <1.3 × t, it is difficult to elastically deform the lid 3 appropriately in the vertical direction, and when T> 1.7 × t, the protruding amounts of the protruding portion 3a and the curved portion 3b protruding to the concave portion 1a side. Is unnecessarily large, which is disadvantageous in that the volume inside the recess 1a is reduced.

  Preferably, when the width of the protruding portion 3a is W1 and the width of the concave portion 1a is W3, 0.3 × W3 ≦ W1 ≦ 0.7 × W3 may be satisfied. According to this configuration, the battery element can be pressed and fixed firmly with a moderately large area by the protruding portion 3a, and the curved portion 3b can be prevented from being provided. When W1 <0.3 × W3, the width of the protruding portion 3a becomes too small, which is inconvenient in that it is difficult to firmly fix the battery element. When W1> 0.7 × W3, the width of the protruding portion 3a becomes wide. Therefore, the distance between the outside of the protruding portion 3a and the outer peripheral portion joined to the base body 1 becomes small, and as a result, the lid 3 cannot be provided with an appropriate curved portion 3b.

  Preferably, when the width of the curved portion 3b is W2, 3 × t ≦ W2 ≦ 7 × t. With this configuration, the lid 3 can be easily elastically deformed moderately in the vertical direction, and the battery element can be reliably pressed and fixed from above even if the overall thickness of the battery element varies. The protruding amount of the curved portion 3b protruding toward the concave portion 1a is prevented from increasing, and the volume inside the concave portion 1a is prevented from decreasing. When W2 <3 × t, the width of the curved portion 3b becomes too narrow and it is difficult to appropriately elastically deform the lid body 3 in the vertical direction. When W2> 7 × t, it protrudes toward the concave portion 1a. This is inconvenient in that the protruding amount of the bending portion 3b increases and the volume inside the recess 1a decreases.

  Next, another example of the embodiment of the battery case or the electric double layer capacitor case of the present invention is shown in FIG. In the figure, (a) is a cross-sectional view of the battery case, and (b) is a plan view of the battery case. In addition, the same code | symbol is attached | subjected to the site | part corresponding to an example of the said embodiment. Further, in FIG. 2B, the first metallized layer 1b and the second metallized layer 1c are cross-hatched, but this is to make the figure easy to understand as in FIG. 1B. It does not show a cross section. In another example of the embodiment of the present invention, since the battery case and the electric double layer capacitor case have the same configuration, the battery case will be described below as an example.

  In another example of the embodiment of the battery case of the present invention, a concave portion 1a having a rectangular parallelepiped shape, a prismatic shape, a cylindrical shape, or the like is formed in the center portion of the upper surface, and the first conductor layer 1d and the second conductor layer are formed on the lower surface. The base body 1 made of ceramics provided with the conductor layers 1e independently of each other, the first metallized layer 1b formed on the bottom surface of the recess 1a, and the second metal layer formed around the recess 1a on the top surface of the base body 1 Metallized layer 1c, first connection conductor 2b formed from first metallized layer 1b to first conductor layer 1d, and second formed from second metallized layer 1c to second conductor layer 1e The connecting conductor 2c and a lid 3 which is joined so as to cover the concave portion 1a and at least the lower main surface is conductive are provided, and the lid 3 is entirely in the central portion on the concave portion 1a side. Protruding protrusion 3a is provided Together, the curved portion 3b is provided between the outer peripheral portion joined to the substrate 1 around the projecting portion 3a.

  FIG. 5 shows another example of the embodiment of the battery of the present invention using this battery case. B-1 is a positive electrode plate electrically connected to the first metallized layer 1b. 2 is a negative electrode plate placed in close contact with the upper surface of the positive electrode plate B-1 via an insulating sheet B-3 impregnated with an electrolytic solution B-4, and 3 is a substrate 1 so as to cover the recess 1a. A lid body that is bonded to the upper surface of the metal plate and is electrically connected by contacting the protruding portion 3a with the negative electrode plate B-2, and having an outer peripheral portion bonded and electrically connected to the second metallized layer 1c. is there.

  According to this embodiment, since the second metallized layer 1c formed around the recess 1a on the upper surface of the substrate 1 is provided, the step 1-A formed between the inner surface and the bottom surface is omitted. Therefore, the inside of the recess 1a can be used widely and effectively, and the outer shape of the battery case can be reduced in size.

  The base 1 is made of ceramics similar to the battery case of FIG. 1, and the lid 3 is made of a conductive material such as Al, Cu, carbon, Fe—Ni—Co alloy, Fe—Ni alloy. Or the metal layer 3c which consists of resin, such as an epoxy resin, PPS, and LCP, and is made electrically conductive by Al etc. in the lower main surface is formed.

  Preferably, the lid 3 is made of a resin which is an insulating material, and a metal layer 3c such as Al is formed on almost the entire lower main surface of the base 1 side. Then, the metal layer 3c of the protruding portion 3a is brought into contact with and electrically connected to the negative electrode plate B-2, and the outer peripheral portion is joined and electrically connected to the second metallized layer 1c, so that the upper surface of the substrate 1 is joined. Are joined so as to cover the recess 1a. With this configuration, the upper main surface of the lid 3 is not made conductive, and unnecessary current can be prevented from flowing through the upper surface of the lid 3. Therefore, even if a conductive member contacts the upper main surface of the lid 3, it is possible to effectively prevent problems such as an electrical short circuit from occurring.

  Furthermore, FIG. 3 shows another example of the embodiment of the battery case or the electric double layer capacitor case of the present invention. In the figure, (a) is a cross-sectional view of the battery case, and (b) is a plan view of the battery case. A battery of the present invention using this battery case is shown in FIG. In these drawings, the same reference numerals are given to the same portions corresponding to other examples. Further, in FIG. 3B, the first metallized layer 1b is cross-hatched, but this is for easy understanding of the drawing and does not show a cross section. In another example of the embodiment of the present invention, since the battery case and the electric double layer capacitor case have the same configuration, the battery case will be described below as an example.

In this example, the battery case of the present invention is a base made of ceramics in which a concave portion 1a having a rectangular parallelepiped shape, a prismatic shape, a cylindrical shape, or the like is formed in the central portion of the upper surface and the first conductor layer 1d is provided on the lower surface. 1, the first metallized layer 1 b formed on the bottom surface of the recess 1 a, the first connection conductor 2 b formed from the first metallized layer 1 b to the first conductor layer 1 d, and the recess 1 a And a lid 3 made of a conductive member. The lid 3 is provided with a protrusion 3a that protrudes entirely toward the recess 1a at the center, and around the protrusion 3a. The curved portion 3b is provided between the outer peripheral portion to be joined to the base 1 of this embodiment. According to this embodiment, the lid 3 that is joined so as to cover the concave portion 1a and made of a conductive member is provided. Since the lid 3 is a negative electrode The step 1-A, the second metallized layer 1c, the second conductor layer 1e, and the second connecting conductor 2c formed between the inner surface and the bottom surface of the recess 1a can be used together. Since it can be omitted, the substrate 1 can be miniaturized, the manufacturing process of the substrate 1 can be simplified, and it can be suitable for mass production.

  The base 1 is made of ceramics similar to the battery case of FIG. 1, and the lid 3 is made of a conductive member such as Al, Cu, carbon, Fe—Ni—Co alloy, Fe—Ni alloy.

  Next, the battery of the present invention will be described in detail below. 4 is a cross-sectional view showing an example of an embodiment of the battery of the present invention using the battery case of FIG. 1 (this is referred to as a battery C), and FIG. 5 is a book using the battery case of FIG. FIG. 6 is a cross-sectional view showing another example of the embodiment of the battery of the invention (this is referred to as battery D), and FIG. 6 is another example of the embodiment of the battery of the present invention using the battery case of FIG. Is a cross-sectional view showing a battery E). Here, B-1 is a positive electrode plate, B-2 is a negative electrode plate, B-3 is an insulating sheet, B-4 is an electrolytic solution, and C, D, and E are batteries.

  The battery C of the present invention includes a battery case of the present invention, a positive electrode plate B-1 electrically connected to the first metallized layer 1b, and an electrolyte B- on the upper surface of the positive electrode plate B-1. 4 and a negative electrode plate B-2 placed in close contact with each other through an insulating sheet B-3 impregnated with 4 and electrically connected to the second metallized layer 1c, and a protrusion 3a of the lid 3 And a lid 3 joined to the upper surface of the base 1 so as to cover the concave portion 1a.

  The battery D of the present invention includes a battery case of the present invention, a positive electrode plate B-1 electrically connected to the first metallized layer 1b, and an electrolyte B- on the upper surface of the positive electrode plate B-1. 4 and the negative electrode plate B-2 placed so as to be in close contact with each other through an insulating sheet B-3 impregnated with 4, and the upper surface of the substrate 1 so that at least the lower main surface is conductive and covers the recess 1a. And the lid 3 having the projecting portion 3a abutted against and electrically connected to the negative electrode plate B-2 and the outer peripheral portion joined to the second metallized layer 1c and electrically connected thereto. It has.

  The battery E of the present invention includes a battery case of the present invention, a positive electrode plate B-1 connected to the first metallized layer 1b, and an upper surface of the positive electrode plate B-1 impregnated with an electrolytic solution B-4. The negative electrode plate B-2 placed so as to be in close contact via the insulating sheet B-3 and the upper surface of the substrate 1 so as to cover the concave portion 1a and the protruding portion 3a are connected to the negative electrode plate B- 2 and a lid 3 that is in contact with and electrically connected.

The positive electrode plate B-1 is a plate or sheet containing a positive electrode active material made of LiCoO ₂ or LiMn ₂ O ₄ and a conductive material such as acetylene black or graphite, and the negative electrode plate B-2 Is a plate or sheet including a negative electrode active material made of a carbon material such as coke or carbon fiber.

  The positive electrode plate B-1 is obtained by adding a binder such as polytetrafluoroethylene or polyvinylidene fluoride to the positive electrode active material added with the conductive material, and mixing it to form a slurry. This is a well-known doctor blade method. For example, the sheet is formed into a sheet using, for example, and then cut into a circular shape.

  Similarly, the negative electrode plate B-2 is made into a slurry by adding and mixing a binder such as polytetrafluoroethylene or polyvinylidene fluoride to the negative electrode active material, and this is made into a sheet using a known doctor blade method or the like. Then, the sheet is produced by cutting the sheet into, for example, a circular shape.

  The insulating sheet B-3 is made of a non-woven fabric made of polyolefin fiber, a microporous membrane made of polyolefin, and the like, impregnated with the electrolytic solution B-4, and between the positive electrode plate B-1 and the negative electrode plate B-2. By being disposed between the positive electrode plate B-1 and the negative electrode plate B-2, the electrolytic solution between the positive electrode plate B-1 and the negative electrode plate B-2 is prevented. The movement of B-4 is enabled to allow a current to flow.

  The electrolyte B-4 is injected into the batteries C, D, and E from the upper surface of the recess 1a using an injection means such as a syringe in a container filled with, for example, argon (Ar) gas that hardly contains moisture. And the inside of the batteries C, D, and E can be airtightly sealed by welding the cover 3 to the upper surface of the base body 1 after injection.

  The electrolytic solution B-4 is obtained by, for example, dissolving a lithium salt such as lithium tetrafluoroborate or an acid such as hydrochloric acid, sulfuric acid, or nitric acid in an organic solvent such as dimethoxyethane or propylene carbonate.

  Such an electrolytic solution B-4 is highly corrosive and soluble, but by using the battery case of the present invention, the substrate 1 is excellent in chemical resistance. The electrolyte solution B-4 is not easily affected by the electrolyte solution B-4, and impurities dissolved out from the battery case are not mixed in the electrolyte solution B-4 so that the electrolyte solution B-4 is not deteriorated. be able to.

  Further, in the metal case that has been conventionally used, as shown in FIG. 7, the positive electrode can 11 and the negative electrode can 12 are integrated by caulking them with a gasket 15 made of polypropylene resin or the like. In the conventional battery, since the caulking portion is present, the caulking portion including the positive electrode can 11, the negative electrode can 12, and the insulating sheet 14 needs to have a size of about 2 mm. Since there is no portion, the external shapes of the batteries C, D, and E can be reduced, which can greatly contribute to downsizing of the portable device. Further, the airtight reliability is high and the mass productivity is excellent.

  Further, since the lid 3 can be firmly bonded to the upper surface of the base 1 having excellent airtightness and heat resistance by a resin adhesive such as polypropylene, solder bonding, seam welding bonding, or the like, the electrolyte B-4 is well accommodated. Even when exposed to a temperature cycle or the like, a gap does not occur and the electrolyte does not leak. Moreover, since airtightness is maintained, it can suppress effectively that the water | moisture content, oxygen, etc. which degrade battery performance enter into electrolyte B-4 from the outside.

  Further, by using this battery case, the first metallized layer 1b is formed on the bottom surface of the recess 1a, so that the positive electrode plate B-1 can be easily connected, and the upper surface of the positive electrode plate B-1 is electrolyzed. A negative electrode plate B-2 that is placed in close contact with an insulating sheet impregnated with the liquid B-4 and connected to the second metallized layer 1c or connected to the lower main surface of the lid 3 Can be placed, and the mass productivity is extremely excellent.

  Furthermore, the protrusion 3a at the center of the lid 3 can be pressed against the battery element such as the positive electrode plate B-1 housed in the battery case from above, and these battery elements can be pressed. It is possible to prevent the lateral displacement. In addition, since the lid 3 is formed with the curved portion 3b, the lid 3 can be easily elastically deformed in the vertical direction, even if there is a variation in the overall thickness or uneven thickness of the battery element. The battery element can be securely pressed from above and fixed. As a result, desired battery performance can be exhibited.

  In the battery D of FIG. 5 and the battery E of FIG. 6, the protrusion 3a on the lower main surface of the lid 3 can be brought into contact with the upper surface of the negative electrode plate B-2 to be electrically connected. 3 is connected to the negative electrode plate B-2 over a wide area, the resistance between the negative electrode plate B-2 and the lid 3 can be reduced, and the negative electrode plate B-2 Since it is possible to charge and discharge efficiently without generating electrical loss with the lid 3, it is excellent in electrical characteristics, more reliable, and can be charged and discharged stably over a long period of time. It will be possible.

  Further, in the battery E of FIG. 6, since the lid 3 can function as a negative electrode of the battery, the external connection terminal members are arranged above and below the battery, and the external connection terminal members are connected so as to sandwich the battery. Thus, the external connection terminal member can be connected. Further, the external connection terminal member is provided with a protrusion, and the external connection terminal member is fitted so that the protrusion 3a on the upper main surface of the lid 3 is formed to be a recess. If connected, the battery E can be made difficult to come off from the external connection terminal member.

  Next, the electric double layer capacitor case and electric double layer capacitor C of the present invention have the same configuration and operational effects as the battery case and battery C described above.

  That is, the electric double layer capacitor case of the present invention shown in FIG. 1 has a rectangular parallelepiped, prismatic or cylindrical recess 1a formed in the center of the upper surface, and the first conductor layer 1d and the second conductor layer on the lower surface. A step 1 formed between a base 1 made of ceramics provided with conductor layers 1e independently of each other, a first metallized layer 1b formed on the bottom surface of the recess 1a, and an inner surface and a bottom surface of the recess 1a. A second metallized layer 1c formed on the upper surface of -A, a first connection conductor 2b formed from the first metallized layer 1b to the first conductor layer 1d, and a second metallized layer 1c to the second The second connection conductor 2c formed over the conductor layer 1e and the lid 3 joined so as to cover the recess 1a are formed, and the lid 3 is entirely on the recess 1a side in the center. When the protruding part 3a is provided Moni, the curved portion 3b is provided between the outer peripheral portion joined to the substrate 1 around the projecting portion 3a.

  Moreover, the electric double layer capacitor C of the present invention shown in FIG. 4 is placed on the upper surface of the above-described case for the electric double layer capacitor and the first metallized layer 1b and electrically connected to the first metallized layer 1b. The first electrode B-1 connected and the second electrode B-1 are placed in close contact with each other via the insulating sheet B-3 impregnated with the electrolytic solution B-4 on the first electrode B-1. The second electrode B-2 electrically connected to the metallized layer 1c, and the lid 3 joined so that the protruding portion 3a is brought into contact with the second electrode B-2 and the concave portion 1a is covered. It has.

  In another example of the electric double layer capacitor case of the present invention shown in FIG. 2, a rectangular parallelepiped recess 1a is formed at the center of the upper surface, and the first conductor layer 1d and the second conductor layer 1d are formed on the lower surface. The base body 1 made of ceramics provided with the conductor layers 1e independently of each other, the first metallized layer 1b formed on the bottom surface of the recess 1a, and the second metal layer formed around the recess 1a on the top surface of the base body 1 Metallized layer 1c, first connection conductor 2b formed from first metallized layer 1b to first conductor layer 1d, and second formed from second metallized layer 1c to second conductor layer 1e The connecting conductor 2c and a lid 3 which is joined so as to cover the concave portion 1a and at least the lower main surface is conductive are provided, and the lid 3 is entirely in the central portion on the concave portion 1a side. Protruding protrusion 3a is provided Together are curved portion 3b is provided between the outer peripheral portion joined to the substrate 1 around the projecting portion 3a.

  Further, in another example of the embodiment of the electric double layer capacitor D shown in FIG. 5, the protruding portion 3a having a large area of the lower main surface of the lid 3 in which at least the lower main surface is conductive is provided. The second electrode B-2 is in contact with and electrically connected, and the outer peripheral portion is joined to and electrically connected to the second metallized layer 1c.

  In another example of the embodiment of the electric double layer capacitor case of the present invention shown in FIG. 3, a lid 3 made of a conductive member is provided so as to cover the recess 1 a.

Further, in another example of the embodiment of the electric double layer capacitor E shown in FIG. 6, the protrusion 3a is joined to the second electrode B-2 while being joined to the upper surface of the base 1 so as to cover the recess 1a. The first electrode B-1 and the second electrode B-2 each include a lid 3 made of a conductive member that is in contact with and electrically connected. For example, the first electrode B-1 and the second electrode B-2 are carbonized with phenol resin fibers (novoloid fibers). Activation is obtained by bringing this fiber into contact with an activation gas such as high-temperature steam in a high-temperature atmosphere of 800 to 1000 ° C., and volatile components in carbides or a part of carbon atoms are removed. It is produced by a process of gasification, mainly developing a fine structure of 1 to 10 nm and increasing the internal surface area to 1 × 10 ⁶ m ² / kg or more. The electric double layer capacitor C of the present invention has no polarity in the first and second conductor layers 1d and 1e, and can be used as an anode on the first conductor layer 1d side and a cathode on the second conductor layer 1e side, The reverse polarity can also be used.

The electrolytic solution B-4 is, for example, a lithium salt such as lithium hexafluorophosphate (LiPF ₆ ) or a quaternary ammonium salt such as tetraethylammonium tetrafluoroborate ((C ₂ H ₅ ) ₄ NBF ₄ ) using propylene carbonate. It is dissolved in a solvent such as (PC) or sulfolane (SLF).

  Further, for the insulating sheet B-3, for example, a resin having heat resistance such as glass fiber, polyphenylene sulfide, polyethylene terephthalate, and polyamide is used.

  The electric double layer capacitors C, D, and E have the first electrode B-1, the insulating sheet B-3, the second electrode B-2, and the lid 3 on the top surface of the first metallized layer 1b. After being placed in close contact and injecting the electrolyte solution B-4, the substrate 1 is coated by a method such as brazing using Al brazing, Ag brazing, Au-Sn solder or the like or bonding using a resin adhesive or the like. The electric double layer capacitors C, D, and E are joined to the upper surface so as to cover the concave portion 1a.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the battery case C, D, E or the electric double layer capacitor C, D, E using the battery case having one recess 1a or the case for the electric double layer capacitor has been described, but for the battery having a plurality of recesses 1a. It may be a case or a case for an electric double layer capacitor. In that case, the lid 3 is a single lid 3 that covers all the recesses 1a, or a plurality of lids 3 that cover the respective recesses 1a are attached. What should I do? When using a battery case or an electric double layer capacitor case having a plurality of recesses 1a in this way, the batteries C, D, E or electric double layer capacitors C, D, E produced in the respective recesses 1a are used. High-capacity batteries C, D, E or electric double layer capacitors C, D, E can be obtained by connecting them in parallel, and batteries C, D, C that can supply a high voltage by connecting them in series. E.

  1 to 6 show a configuration in which one bending portion 3b is provided between the protruding portion 3a and the outer peripheral portion, but a plurality of bending portions 3b are provided between the protruding portion 3a and the outer peripheral portion. A form may be sufficient and it can make lid 3 elastically deform more easily.

  INDUSTRIAL APPLICABILITY The present invention can be used as a thin battery case and battery that can be easily connected to an external electric circuit board and can effectively prevent leakage of an electrolytic solution, as used in communication equipment such as a mobile phone.

(A) is sectional drawing which shows an example of embodiment of the case for batteries of this invention, or the case for electric double layer capacitors, (b) is a top view of (a). (A) is sectional drawing which shows the other example of embodiment of the case for batteries of this invention, or the case for electric double layer capacitors, (b) is a top view of (a). (A) is sectional drawing which shows the other example of embodiment of the case for batteries of this invention, or the case for electric double layer capacitors, (b) is a top view of (a). FIG. 2 is a cross-sectional view of a battery or an electric double layer capacitor using the battery case or electric double layer capacitor case of FIG. 1, showing an example of an embodiment of the battery or electric double layer capacitor of the present invention. FIG. 5 is a cross-sectional view of a battery or an electric double layer capacitor using the battery case or electric double layer capacitor case of FIG. 2, showing another example of the embodiment of the battery or electric double layer capacitor of the present invention. FIG. 4 is a cross-sectional view of a battery or an electric double layer capacitor using the battery case or electric double layer capacitor case of FIG. 3, showing another example of the embodiment of the battery or electric double layer capacitor of the present invention. It is sectional drawing which shows the example of the conventional battery or an electrical double layer capacitor.

Explanation of symbols

1: Base 1a: Recess 1b: First metallized layer 1c: Second metallized layer 1d: First conductor layer 1e: Second conductor layer 2b: First connection conductor 2c: Second connection conductor 3: Lid 3a: Protruding part 3b: Curved part B-1: Positive electrode plate, first electrode B-2: Negative electrode plate, second electrode B-3: Insulating sheet B-4: Electrolyte C, D, E: Battery, electric double layer capacitor

Claims (12)

A base made of ceramics having a recess formed in the center of the upper surface and a first conductor layer and a second conductor layer provided independently on the lower surface, and a first metallization layer formed on the bottom surface of the recess A second metallization layer formed on the upper surface of the step formed between the inner surface and the bottom surface of the recess, and a first metal layer formed from the first metallization layer to the first conductor layer. A connecting conductor; a second connecting conductor formed from the second metallization layer to the second conductor layer; and a lid joined so as to cover the recess, the lid Is provided with a protruding portion that is entirely protruded toward the concave portion at the center portion, and a curved portion is provided between an outer peripheral portion that is joined to the base body around the protruding portion. Battery case. The battery case according to claim 1, a positive electrode plate electrically connected to the first metallization layer, and an upper surface of the positive electrode plate so as to be in close contact via an insulating sheet impregnated with an electrolytic solution. A negative electrode plate that is placed and electrically connected to the second metallization layer, and the protrusion is brought into contact with the negative electrode plate and joined to the upper surface of the base so as to cover the concave portion A battery comprising the lid. A base made of ceramics having a recess formed in the center of the upper surface and a first conductor layer and a second conductor layer provided independently on the lower surface, and a first metallization layer formed on the bottom surface of the recess A second metallization layer formed around the recess on the upper surface of the base, a first connection conductor formed from the first metallization layer to the first conductor layer, and the second A second connecting conductor formed from the metallized layer to the second conductor layer, and a lid that is joined so as to cover the recess and at least the lower main surface is made conductive. The lid body is provided with a protruding portion that protrudes entirely toward the concave portion at the center portion, and a curved portion is provided between the outer peripheral portion joined to the base body around the protruding portion. A battery case characterized by comprising: The battery case according to claim 3, a positive electrode plate electrically connected to the first metallization layer, and an upper surface of the positive electrode plate so as to be in close contact via an insulating sheet impregnated with an electrolytic solution. The negative electrode plate placed is joined to the upper surface of the base so as to cover the concave portion, and the protruding portion is in contact with and electrically connected to the negative electrode plate, and the outer peripheral portion is the second electrode A battery comprising: the lid body joined to and electrically connected to a metallized layer. From the first metallized layer formed on the bottom surface of the recess, a base made of ceramics having a recess formed in the center of the upper surface and provided with a first conductor layer on the lower surface, A first connecting conductor formed over the first conductor layer; and a lid made of a conductive member and joined so as to cover the recess, and the lid is entirely formed in the central portion. The battery case is provided with a protruding portion that protrudes toward the concave portion and a curved portion between the protruding portion and an outer peripheral portion that is joined to the base body. The battery case according to claim 5, the positive electrode plate connected to the first metallization layer, and the positive electrode plate placed so as to be in close contact with an upper surface of the positive electrode plate via an insulating sheet impregnated with an electrolytic solution. A negative electrode plate, and a lid that is joined to the upper surface of the base body so as to cover the recess, and the protrusion is in contact with and electrically connected to the negative electrode plate. A battery characterized by. A base made of ceramics having a recess formed in the center of the upper surface and a first conductor layer and a second conductor layer provided independently on the lower surface, and a first metallization layer formed on the bottom surface of the recess A second metallization layer formed on the upper surface of the step formed between the inner surface and the bottom surface of the recess, and a first metal layer formed from the first metallization layer to the first conductor layer. A connecting conductor; a second connecting conductor formed from the second metallization layer to the second conductor layer; and a lid joined so as to cover the recess, the lid Is provided with a protruding portion that is entirely protruded toward the concave portion at the center portion, and a curved portion is provided between an outer peripheral portion that is joined to the base body around the protruding portion. Case for electric double layer capacitor. The case for an electric double layer capacitor according to claim 7, a first electrode electrically connected to the first metallized layer, and an insulating sheet impregnated with an electrolyte on the upper surface of the first electrode A second electrode placed so as to be in close contact and electrically connected to the second metallization layer, and a contact between the projecting portion and the second electrode and a cover covering the recess An electric double layer capacitor comprising: a covered lid. A base made of ceramics having a recess formed in the center of the upper surface and a first conductor layer and a second conductor layer provided independently on the lower surface, and a first metallization layer formed on the bottom surface of the recess A second metallization layer formed around the recess on the upper surface of the base, a first connection conductor formed from the first metallization layer to the first conductor layer, and the second A second connecting conductor formed from the metallized layer to the second conductor layer, and a lid that is joined so as to cover the recess and at least the lower main surface is made conductive. The lid body is provided with a protruding portion that protrudes entirely toward the concave portion at the center portion, and a curved portion is provided between the outer peripheral portion joined to the base body around the protruding portion. Electric double layer capacity characterized by Case for data. The case for an electric double layer capacitor according to claim 9, a first electrode electrically connected to the first metallization layer, and an insulating sheet impregnated with an electrolyte on the upper surface of the first electrode The second electrode placed so as to be in close contact with the upper surface of the base body so as to cover the concave portion, and the protrusion is brought into contact with and electrically connected to the second electrode, An electric double layer capacitor comprising an outer peripheral portion joined to and electrically connected to the second metallized layer. From the first metallized layer formed on the bottom surface of the recess, a base made of ceramics having a recess formed in the center of the upper surface and provided with a first conductor layer on the lower surface, A first connecting conductor formed over the first conductor layer; and a lid made of a conductive member and joined so as to cover the recess, and the lid is entirely formed in the central portion. Is provided with a protruding portion that protrudes toward the concave portion, and a curved portion is provided between the protruding portion and an outer peripheral portion that is joined to the base body. For case. The case for an electric double layer capacitor according to claim 11, the first electrode connected to the first metallized layer, and the upper surface of the first electrode are in close contact with each other through an insulating sheet impregnated with an electrolyte. A second electrode placed on the upper surface of the base body so as to cover the concave portion, and the protrusion is in contact with the negative electrode plate and electrically connected thereto An electric double layer capacitor comprising:

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