JP2002245975A - Square battery - Google Patents
Square batteryInfo
- Publication number
- JP2002245975A JP2002245975A JP2001038433A JP2001038433A JP2002245975A JP 2002245975 A JP2002245975 A JP 2002245975A JP 2001038433 A JP2001038433 A JP 2001038433A JP 2001038433 A JP2001038433 A JP 2001038433A JP 2002245975 A JP2002245975 A JP 2002245975A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- concave portion
- female mold
- mold
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000002931 mesocarbon microbead Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910008163 Li1+x Mn2-x O4 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、角型電池に関し、
特にセパレータを介して正極および負極を対向させて巻
回して製造した電池要素を角型形状の電池缶に収納して
密閉した角型電池に関し、とくにリチウムイオン電池等
の密閉型の角型電池に関する。The present invention relates to a prismatic battery,
In particular, it relates to a sealed rectangular battery in which a battery element manufactured by winding a cathode and an anode facing each other with a separator interposed therebetween is sealed in a square battery can, and particularly to a sealed square battery such as a lithium ion battery. .
【０００２】[0002]
【従来の技術】小型の電子機器の電源として各種の電池
が用いられている。携帯電話、ノートパソコン、カムコ
ーダ等の電源としては、小型で大容量の密閉型電池であ
るリチウムイオン二次電池等の非水電解液電池が用いら
れている。これらの非水電解液電池としては、円筒型、
角型の構造を有したものが用いられている。小型の電子
機器の電源として用いられているリチウムイオン電池に
おいては、正極集電体および負極集電体にそれぞれ活物
質を塗布した後に、セパレータを介在させて巻回して電
池缶内に収納して密閉したものが用いられている。2. Description of the Related Art Various batteries are used as power supplies for small electronic devices. Non-aqueous electrolyte batteries such as lithium ion secondary batteries, which are small, large-capacity sealed batteries, are used as power sources for mobile phones, notebook computers, camcorders, and the like. These non-aqueous electrolyte batteries are cylindrical,
One having a square structure is used. In a lithium-ion battery used as a power source for a small electronic device, an active material is applied to each of a positive electrode current collector and a negative electrode current collector, and then wound with a separator interposed therebetween and stored in a battery can. Sealed ones are used.
【０００３】電池使用機器は一般には直方体状の形状の
電池収納部を有しており、このような電池収納部に収納
する電池としては、円筒形状の電池では無効な容積が大
きくなるという問題があった。さらに、電池収納部分の
厚さによって円筒型の電池の径が制限を受けるので、小
型、あるいは薄型の機器においては、厚みの薄い角柱状
の角型電池が用いられている。これらの電池において
は、電池の充電放電時には活物質として使用した物質の
変化を伴うために、電池の電極の厚みが変化するという
問題点があった。Battery-equipped equipment generally has a rectangular parallelepiped battery housing. The battery housed in such a battery housing has the problem that a cylindrical battery has an ineffective volume. there were. Furthermore, since the diameter of a cylindrical battery is limited by the thickness of the battery housing portion, a prismatic battery having a small thickness is used in a small or thin device. In these batteries, there is a problem that the thickness of the electrode of the battery changes because the material used as the active material changes during charging and discharging of the battery.
【０００４】例えば、リチウムイオン電池においては、
充電時には、負極電極の活物質の結晶格子中にリチウム
がドープされるために、負極活物質の膨張を生じる。金
属製の電池缶を外装容器とした角型電池においては、正
極活物質、負極活物質の膨張によって正極電極あるいは
負極電極の活物質層の厚さが大きくなり、電池缶の側面
が膨らむことが避けられなかった。電池缶の膨らみが大
きくなると、電池使用機器への電池の装着が困難となる
等の問題が生じたり、予め膨張を見越して空間を準備す
るために無効な空間が増加する等の問題点があった。For example, in a lithium ion battery,
During charging, lithium is doped into the crystal lattice of the active material of the negative electrode, so that the negative electrode active material expands. In a rectangular battery in which a metal battery can is used as an outer container, the thickness of the active material layer of the positive electrode or the negative electrode may increase due to the expansion of the positive electrode active material and the negative electrode active material, and the side surface of the battery can may swell. It was inevitable. When the swelling of the battery can becomes large, there are problems such as difficulty in mounting the battery on the battery-using device, and an increase in invalid space in order to prepare the space in advance in anticipation of the expansion. Was.
【０００５】ニカド電池等において初期活性化の際の電
池の変形を防止するために、電池の外装缶の発電要素が
当接する側面を凹ませた角型密閉型電池が記載されてい
る。例えば、特開昭６２−１２６５６６号公報には、正
極板と負極板をセパレータを介して交互に積層した極板
群を電槽に収納した後に、積層方向に電槽をプレス加工
することによって、電槽自体がエンドプレートとして働
き、極板群を均一に且つ緊密に圧迫するようにした電池
が記載されている。また、特開平７−１８３０１０号公
報には、角形の外装缶に発電要素の端板と当接する側面
に予め凹部を形成し、凹部を形成した外装缶に発電要素
を挿入した角形密閉電池が記載されている。[0005] In order to prevent deformation of the battery at the time of initial activation in a nickel-cadmium battery or the like, there is described a rectangular sealed battery in which a side surface of a battery outer can in contact with a power generation element is depressed. For example, in JP-A-62-126566, after storing a group of electrode plates in which a positive electrode plate and a negative electrode plate are alternately stacked via a separator in a battery case, by pressing the battery case in the stacking direction, A battery is described in which a battery case itself functions as an end plate to uniformly and tightly press the electrode group. Japanese Patent Application Laid-Open No. 7-183010 describes a rectangular sealed battery in which a concave portion is formed in advance on a side surface of a rectangular outer can that comes into contact with an end plate of a power generating element, and the power generating element is inserted into the outer can having the concave portion. Have been.
【０００６】図６は、従来の電池缶の変形を防止する電
池缶を説明する図であり、特開平７−１８３０１０号公
報に記載の電池の製造方法を説明する図である。図６
（Ａ）は電池缶を説明する斜視図である。電池缶１の側
面２に凹部３を形成したものであり、先に凹部を形成す
ることによって、電池要素を電池缶内に収納した場合に
は、電池要素の端板、すなわち板状の複数の電極を積層
した場合の端部の電極が、凹部の形成によって内部に突
出した部分において保持されるものとすることにより、
長側面の内面の電極板の下端部が、電池缶の底部に形成
される曲面部が崩れてしまうという問題点を解決するも
のである。電池缶の缶壁面への凹部３の形成は、電池缶
の内部に凹部を有する雌型金型を配置し、電池缶の外部
から凸部を有する雄型金型を配置してプレス成型によっ
て行われるが、電池缶の開口幅４が小さな小型あるいは
扁平な角型の電池缶においては、プレス成形によって形
成することは極めて困難である。FIG. 6 is a view for explaining a conventional battery can for preventing deformation of the battery can, and is a view for explaining a method for manufacturing a battery described in Japanese Patent Application Laid-Open No. 7-183010. FIG.
(A) is a perspective view explaining a battery can. A concave portion 3 is formed in the side surface 2 of the battery can 1. By forming the concave portion first, when the battery element is housed in the battery can, an end plate of the battery element, that is, a plurality of plate-shaped end plates. The electrode at the end when the electrodes are stacked is held at the part protruding inside by the formation of the concave portion,
It is an object of the present invention to solve the problem that the lower end portion of the electrode plate on the inner surface of the long side surface has a curved portion formed at the bottom of the battery can collapse. The concave portion 3 is formed on the wall surface of the battery can by pressing a female die having a concave portion inside the battery can and a male die having a convex portion from the outside of the battery can. However, it is extremely difficult to form a small or flat rectangular battery can having a small opening width 4 by press molding.
【０００７】すなわち、図６（Ｂ）に雌型の金型の斜視
図を示すように、電池缶内に凹部を有する雌型金型５を
配置し、電池缶の外部から雌型金型の凹状部６に対応し
た凸状部を有する雄型金型を用いてプレス成形を行う
が、プレス成形の後には、雌型の引出方向７と反対方向
に位置する雌型金型の壁部８が側面２への凹部３の形成
によって電池缶の内部へ突出する。このため雌型金型を
抜き出すことが困難となる。無理に引き抜こうとした場
合には、電池缶の内部に傷を生じたり、あるいは電池缶
を変形するおそれがあった。また、電池缶の内部に入れ
る金型として、複数個に分割可能なものを用いることに
よって、金型を分割して取り出す方法も考えられるが、
開口幅４が小さな電池においては、金型として、複数個
に分割可能なものを用いることは、金型の機械的強度等
の面で事実上実施することは不可能であった。That is, as shown in a perspective view of a female mold in FIG. 6 (B), a female mold 5 having a concave portion is arranged in a battery can and the female mold is Press molding is performed using a male mold having a convex part corresponding to the concave part 6, and after the press molding, the wall part 8 of the female mold located in the direction opposite to the drawing direction 7 of the female mold. Project into the inside of the battery can due to the formation of the concave portion 3 in the side surface 2. For this reason, it becomes difficult to extract the female mold. If an attempt is made to forcibly pull out the battery can, the battery can may be damaged or the battery can may be deformed. Also, a method of dividing the mold and taking it out by using a mold that can be divided into a plurality of molds as a mold to be put in the battery can is also considered.
In a battery having a small opening width 4, it is practically impossible to use a mold that can be divided into a plurality of molds in terms of the mechanical strength of the mold.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、角型電池の
充電時の電池要素の膨張による電池缶の側面の膨張を防
止した、電池壁面に凹部を設けた角型電池を提供するこ
とを課題とするものであり、特に電池缶の開口部の大き
さが小さく、厚みの薄い電池において凹部を形成するこ
とを課題としたものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a rectangular battery in which a concave portion is provided on a wall surface of a battery in which the side surface of a battery can is prevented from expanding due to expansion of a battery element during charging of the rectangular battery. It is an object of the present invention to form a concave portion in a battery having a small opening size of a battery can and a small thickness.
【０００９】[0009]
【課題を解決するための手段】本発明の課題は、正極電
極および負極電極をセパレータを介して積層した電池要
素あるいは正極電極および負極電極をセパレータを介し
て巻回した扁平状の電池要素を収納した角型電池におい
て、電池要素の積層面あるいは扁平面に平行な電池缶側
面の少なくとも一方の面には、少なくとも電池缶の底面
側の端部には段差を有さない凹部を有する角型電池によ
って解決することができる。凹部の電池缶の開口部側の
端部には段差を設けた前記の角型電池である。前記側面
の凹部の上部の側面には、内部圧力の増大によって開裂
する薄肉部を設けた前記の角型電池である。凹部を複数
個設けたものである前記の角型電池である。電池缶の開
口の方向へ複数個の凹部を設けたものである前記の角型
電池である。An object of the present invention is to accommodate a battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween or a flat battery element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween. A rectangular battery having at least one of the side surfaces of the battery can parallel to the lamination surface or the flat surface of the battery element and at least an end portion on the bottom side of the battery can without a step. Can be solved by The above-described prismatic battery is provided with a step at an end of the concave portion on the opening side of the battery can. The prismatic battery according to the above-described battery, wherein a thin portion that is cleaved by an increase in internal pressure is provided on a side surface above the concave portion on the side surface. The above-described prismatic battery having a plurality of recesses. The above-described prismatic battery in which a plurality of recesses are provided in the direction of the opening of the battery can.
【００１０】また、正極電極および負極電極をセパレー
タを介して積層した電池要素あるいは正極電極および負
極電極をセパレータを介して巻回した扁平状の電池要素
を収納した角型電池の製造方法において、電池要素の扁
平面に平行な電池缶側面に対して、電池缶側面および電
池缶の底部側には開放した凹部を有した雌型金型を配置
して、電池缶の外側より雌型金型の凹部に嵌合する雄型
金型を配置してプレス成形を行うことによって、少なく
とも電池缶の底面の端部には段差を有さない傾斜面を有
した凹部を形成する角型電池の製造方法によって解決す
ることができる。In a method for manufacturing a rectangular battery in which a battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween or a flat battery element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, On the side of the battery can parallel to the flat surface of the element, a female mold having an open concave portion is arranged on the side of the battery can and on the bottom side of the battery can. A method of manufacturing a prismatic battery in which a male mold that fits into a concave portion is arranged and press-formed to form a concave portion having an inclined surface having no step at least at an end of a bottom surface of the battery can. Can be solved by
【００１１】[0011]
【発明の実施の形態】本発明は、正極電極と負極電極を
セパレータを介して積層した電池要素、あるいは正極電
極と負極電極をセパレータを介して巻回した扁平状の電
池要素を電池缶内に収納した密閉型電池において、充電
時に電池要素の積層面あるいは扁平面と垂直な方向への
膨張を原因とする電池缶の変形を、電池缶の開口幅が小
さな薄型の電池においても電池缶の側面の少なくとも一
方の面に凹部を形成することによって可能としたもので
あり、凹部を形成するための金型の形状を工夫すること
によって、板材からのトランスファー成形による一連の
製造工程によって、形状および寸法精度が安定した電池
缶を製造することを可能としたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween, or a flat battery element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween. In the enclosed sealed battery, deformation of the battery can caused by expansion in the direction perpendicular to the lamination surface or flat surface of the battery element during charging can be performed on the side of the battery can even in a thin battery with a small opening width of the battery can. Is formed by forming a concave portion on at least one surface of the mold, and by devising a shape of a mold for forming the concave portion, the shape and dimensions are obtained by a series of manufacturing steps by transfer molding from a plate material. This makes it possible to manufacture a battery can with stable accuracy.
【００１２】すなわち、電池缶の側面に凹部を形成する
ために電池缶の内部に挿入する金型として、金型の取り
出し方向の反対側には、凹部が開放した部分を有し、プ
レス成形の後に金型の取り出しを容易としたものであ
る。なお、本発明において、凹部は、底部が電池缶の側
面に平行な面を有するものに限らず、断面が三角形状等
の多角形状、円状、楕円状、その他の曲面状のものも意
味する。That is, as a mold to be inserted into the inside of the battery can to form a recess on the side surface of the battery can, the mold has a portion with an open recess on the side opposite to the direction in which the mold is removed. This facilitates removal of the mold later. In the present invention, the concave portion is not limited to one having a bottom portion having a surface parallel to the side surface of the battery can, but also has a polygonal shape such as a triangular shape, a circular shape, an elliptical shape, or another curved shape. .
【００１３】以下に図面を参照して本発明を説明する。
図１は、本発明の角型電池の一実施例を説明する図であ
る。図１（Ａ）は、側面図を示し、図１（Ｂ）は、図１
（Ａ）におけるＡ−Ａ’線の断面図を示す。正極電極と
負極電極をセパレータを介して積層した電池要素、ある
いは正極電極と負極電極をセパレータを介して巻回して
作製した扁平状の電池要素を収納した電池缶１の、電池
用要素の積層面あるいは扁平面と平行な側面２に凹部３
を形成したものであり、電池缶１の側面２に形成した凹
部３の上端部９には段差１０が形成されている。一方、
凹部の下端部１１には段差は形成されておらず、滑らか
な傾斜面１２が形成されている。凹部３の幅は、電池缶
の幅の３０％〜９０％とすることが好ましく、電池缶の
側面の中央部に設けることが好ましい。また、電池缶の
変形を防止する点では、電池缶の角部に近い部分に凹部
を生成することが好ましいが、中央部に凹部を形成する
方が電池要素の変形を防止する点では好ましい。また、
電池缶１の側面の凹部の上端部と開口端部との間には、
電池缶の内部での圧力の増大の際に内部圧力を開放する
圧力開放弁として作用する薄肉部１３を形成することが
できる。このような目的で形成する薄肉部は、電池缶の
材料がアルミニウムの場合には厚さ０．０５〜０．２ｍ
ｍ、電池缶の幅の３０〜６０％とすることが好ましい。The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating one embodiment of the prismatic battery of the present invention. FIG. 1A shows a side view, and FIG.
FIG. 3A is a cross-sectional view taken along line AA ′ in FIG. A battery element lamination surface of a battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween, or a battery can 1 containing a flat battery element produced by winding a positive electrode and a negative electrode with a separator interposed therebetween Alternatively, the concave portion 3 is formed on the side surface 2 parallel to the flat surface.
A step 10 is formed at the upper end 9 of the concave portion 3 formed on the side surface 2 of the battery can 1. on the other hand,
No step is formed at the lower end 11 of the recess, and a smooth inclined surface 12 is formed. The width of the concave portion 3 is preferably 30% to 90% of the width of the battery can, and is preferably provided at the center of the side surface of the battery can. In addition, in order to prevent deformation of the battery can, it is preferable to form a concave portion near a corner of the battery can. However, it is preferable to form a concave portion in the center portion in order to prevent deformation of the battery element. Also,
Between the upper end of the recess on the side surface of the battery can 1 and the open end,
When the pressure inside the battery can is increased, the thin portion 13 which acts as a pressure release valve for releasing the internal pressure can be formed. The thin portion formed for such a purpose has a thickness of 0.05 to 0.2 m when the material of the battery can is aluminum.
m, 30 to 60% of the width of the battery can.
【００１４】図２は、本発明の角型電池の他の実施例を
説明する図である。図２（Ａ）は、側面図を示し、図２
（Ｂ）は、図２（Ａ）におけるＢ−Ｂ’線の断面図を示
す。正極電極と負極電極をセパレータを介して積層した
電池要素、あるいは正極電極と負極電極をセパレータを
介して巻回して作製した扁平状の電池要素を収納した電
池缶１の積層面あるいは扁平面と平行な側面２に凹部３
を形成したものであり、電池缶１の側面２に形成した凹
部３の上端部９および下端部１１のいずれにも段差は形
成されておらず、滑らかな傾斜面１２が形成されてい
る。このように、上端部にも段差を形成せずに滑らかな
傾斜面を形成することによって、電池缶内部への電池要
素の挿入をより円滑に行うことが可能となる。FIG. 2 is a view for explaining another embodiment of the prismatic battery of the present invention. FIG. 2A shows a side view, and FIG.
FIG. 2B is a cross-sectional view taken along line BB ′ in FIG. A battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween, or a battery can 1 in which a flat battery element produced by winding a positive electrode and a negative electrode with a separator interposed is parallel to the laminating surface or flat surface of the battery can 1 Concave 3 on the side 2
No step is formed at any of the upper end 9 and the lower end 11 of the concave portion 3 formed on the side surface 2 of the battery can 1, and a smooth inclined surface 12 is formed. In this way, by forming a smooth inclined surface without forming a step at the upper end portion, it becomes possible to more smoothly insert the battery element into the inside of the battery can.
【００１５】図３は、本発明の角型電池の他の実施例を
説明する図である。図３（Ａ）は、側面図を示し、図３
（Ｂ）は、図３（Ａ）におけるＣ−Ｃ’線の断面図を示
す。正極電極と負極電極をセパレータを介して積層した
電池要素、あるいは正極電極と負極電極をセパレータを
介して巻回して作製した扁平状の電池要素を収納した電
池缶１の積層面あるいは扁平面と平行な側面２に複数個
の凹部３ａ、３ｂを形成したものであり、電池缶１の側
面２に形成した凹部３の上端部９および下端部１１のい
ずれにも段差は形成されておらず、滑らかな傾斜面１２
が形成されている。FIG. 3 is a view for explaining another embodiment of the prismatic battery of the present invention. FIG. 3A shows a side view, and FIG.
FIG. 3B is a cross-sectional view taken along line CC ′ in FIG. A battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween, or a battery can 1 in which a flat battery element produced by winding a positive electrode and a negative electrode with a separator interposed is parallel to the laminating surface or flat surface of the battery can 1 A plurality of recesses 3a and 3b are formed on the side surface 2 of the battery can 1. No step is formed on any of the upper end 9 and the lower end 11 of the recess 3 formed on the side 2 of the battery can 1. Inclined surface 12
Are formed.
【００１６】複数個の凹部３ａおよび３ｂは電池缶２の
側面の中央から等間隔の位置に設けられていることが好
ましい。また、凹部３ａおよび３ｂの幅は、電池缶の厚
みが０．３ｍｍ前後の場合には、０．４ｍｍ〜１．０ｍ
ｍとすることが好ましい。また、電池缶の肉厚が０．６
ｍｍ前後の場合には、０．７ｍｍ〜１．０ｍｍとするこ
とが好ましい。また、設ける個数は１個〜３個とするこ
とが好ましい。次に、本発明の角型電池の電池缶の製造
方法を説明する。一般に、電池缶は、板材を出発材料と
して、絞り加工をはじめとする各種の工程を連続的に施
して製造されている。本発明の電池缶は、凹部形成工程
を一連の連続的な工程の一つとして組み入れることによ
って製造することができる。The plurality of recesses 3a and 3b are preferably provided at equal intervals from the center of the side surface of the battery can 2. When the thickness of the battery can is about 0.3 mm, the width of the recesses 3 a and 3 b is 0.4 mm to 1.0 m.
m is preferable. Also, if the thickness of the battery can is 0.6
In the case of about mm, it is preferable to set it to 0.7 mm to 1.0 mm. Further, it is preferable that the number to be provided is one to three. Next, a method for manufacturing the battery can of the prismatic battery according to the present invention will be described. Generally, a battery can is manufactured by continuously performing various processes such as drawing on a plate material as a starting material. The battery can of the present invention can be manufactured by incorporating the recess forming step as one of a series of continuous steps.
【００１７】板材から電池缶の形状が形成された後に電
池缶の側面の少なくとも一方の面に凹部が形成可能な凹
状の雌型金型を挿入し、電池缶の外部から形成すべき凹
部に合致した雄型の金型でプレス成形を行うことによっ
て、少なくともいずれか一方の面に凹部が形成される。
凹部が形成されて電池缶の側面が内側に突出すると、凹
部の形成に使用した雌型の金型を取り出すことが困難と
なり、金型の取り出しの際に電池缶に傷が生じたり、電
池缶を変形させる等の問題があったが、本発明において
は、使用する金型の形状を工夫することによって凹部を
プレス成形したことを可能としたものである。After the shape of the battery can is formed from the plate material, a concave female mold capable of forming a recess is inserted into at least one of the side surfaces of the battery can to match the recess to be formed from the outside of the battery can. By performing press molding with the male mold thus formed, a concave portion is formed on at least one of the surfaces.
If the concave portion is formed and the side surface of the battery can projects inward, it becomes difficult to remove the female mold used to form the concave portion, and the battery can may be damaged when removing the mold, or the battery can may be damaged. However, in the present invention, it is possible to press-mold the concave portion by devising the shape of a mold to be used.
【００１８】図４は、本発明の電池缶の成形方法を説明
する図である。図４（Ａ）は、プレス成形工程を電池缶
の高さ方向に直角の面で切断した断面図であり、図４
（Ｂ）は、Ｄ−Ｄ’線で切断した断面図であり、図４
（Ｃ）は、Ｅ−Ｅ’線で切断した断面図である。電池缶
１内に、電池要素の積層面あるいは扁平面と平行な側面
２の内面側に雌型金型５の凹状部６を向けるようにして
挿入した後に、電池缶１の側面２に、両側から２個の雄
型金型１４をその凸状部１５を雌型金型５の凹状部６に
対応するように配置してプレス成形を行う。次いで、プ
レス成形後に、電池缶の内部に挿入した雌型金型５を引
出方向７へ引き出すが、図４（Ｃ）に示すように、雌型
金型の引出方向と反対側の端部１６の凹状部の延長部
は、凹状部の底部間の間隔と同じかその間隔よりも小さ
な厚みを有する雌型金型５であるので、プレス成形によ
って電池缶の側面２に凹部が形成されて電池缶内部へ突
出した部分が生じた後であっても、電池缶に傷を生じた
り、あるいは電池缶を変形させることなく雌型金型５を
引き出すことが可能となる。FIG. 4 is a view for explaining a method for forming a battery can according to the present invention. FIG. 4A is a cross-sectional view of the press forming step taken along a plane perpendicular to the height direction of the battery can.
FIG. 4B is a sectional view taken along line DD ′, and FIG.
(C) is a sectional view taken along line EE '. After being inserted into the battery can 1 with the concave portion 6 of the female mold 5 facing the inner side of the side surface 2 parallel to the lamination surface or the flat surface of the battery element, The two male molds 14 are press-formed by arranging the convex portions 15 thereof so as to correspond to the concave portions 6 of the female mold 5. Next, after press molding, the female mold 5 inserted into the battery can is pulled out in the pull-out direction 7, and as shown in FIG. 4C, the end 16 opposite to the pull-out direction of the female mold is pulled out. The extended portion of the concave portion is a female mold 5 having a thickness equal to or smaller than the interval between the bottom portions of the concave portion. Even after the protruding portion is formed inside the can, the female mold 5 can be pulled out without damaging the battery can or deforming the battery can.
【００１９】また、雌型金型５の凹状部傾斜面１７の傾
き、雄型金型１４の凸状部傾斜面１８の傾き、および両
者の大きさの違いによってプレス成形によって形成され
る凹部の壁面の傾斜を調整することができる。傾斜面と
側面とがなす角度が小さくなると、変形部には厚みが厚
い部分が生じることもあり、電池缶に使用する材料の種
類、材料の厚さ等によって適宜調整することが好まし
い。以上の説明では、電池缶の両側に凹部を形成する場
合について述べたが、片面のみに凹部を有する雌形金型
を用いることによっていずれか一方の面に凹部を形成し
ても良い。The inclination of the concave inclined surface 17 of the female mold 5, the inclination of the convex inclined surface 18 of the male mold 14, and the difference between the sizes of the two are different from each other. The inclination of the wall surface can be adjusted. When the angle between the inclined surface and the side surface is small, the deformed portion may have a thick portion, and it is preferable to appropriately adjust the thickness depending on the type of material used for the battery can, the thickness of the material, and the like. In the above description, the case where the concave portion is formed on both sides of the battery can was described. However, the concave portion may be formed on one of the surfaces by using a female mold having the concave portion on only one side.
【００２０】図５は、本発明の角型電池の製造に使用す
ることが可能な雌型金型の例を説明する図である。雌形
金型はいずれも電池缶の両側面に同時に凹状部を形成す
ることが可能な雌形金型である。図５（Ａ）に示す雌型
金型５は、引出方向７と反対側の下端部１１は凹状部６
が開放したものである。雄型金型によって電池缶の側面
が押圧された場合には、電池缶の側面の凹部に対応した
部分が変形し、凹状部の下端部側には滑らかな傾斜が形
成された電池缶を得ることができ、凹状部の下端部が開
放しているので、電池缶内に挿入した雌型金型は電池缶
の内面に突出した部分によって影響を受けることなく電
池缶の外部へ取り出すことができる。FIG. 5 is a diagram illustrating an example of a female mold that can be used for manufacturing the prismatic battery of the present invention. Each of the female molds is a female mold capable of simultaneously forming a concave portion on both side surfaces of the battery can. In the female mold 5 shown in FIG. 5 (A), the lower end 11 on the opposite side to the drawing direction 7 has a concave portion 6.
Is open. When the side surface of the battery can is pressed by the male mold, a portion corresponding to the concave portion on the side surface of the battery can is deformed, and a battery can is obtained in which the lower end of the concave portion has a smooth slope. Since the lower end of the concave portion is open, the female mold inserted into the battery can can be taken out of the battery can without being affected by the portion protruding from the inner surface of the battery can. .
【００２１】図５（Ｂ）に示す雌型金型５は、引出方向
７と反対側の下端部１１は凹状部６が開放するととも
に、凹状部の延長部分のみではなくその他の部分も全て
の厚さが凹状部と同じ厚さとしたものである。図５
（Ｃ）に示す雌型金型５は、引出方向７およびその反対
側の下端部１１が共に凹状部６の延長部分が開放したも
のである。図４（Ｃ）に示す雌型金型を用いることによ
って図２に示す電池缶を製造することができる。図５
（Ｄ）に示す雌型金型５は、電池缶の側面の一方の面の
凹部を形成する部分のみに凹状部６を形成し、凹状部６
の引出方向７およびその反対側の下端部１１は、いずれ
も凹状部と同じ厚さとしたものである。In the female mold 5 shown in FIG. 5 (B), the lower end 11 opposite to the pulling-out direction 7 has the concave portion 6 open, and not only the extended portion of the concave portion but also all other portions. The thickness is the same as that of the concave portion. FIG.
The female mold 5 shown in (C) is one in which the extended portion of the concave portion 6 is open in both the drawing direction 7 and the lower end 11 on the opposite side. The battery can shown in FIG. 2 can be manufactured by using the female mold shown in FIG. FIG.
The female mold 5 shown in (D) has a concave portion 6 formed only on a portion of one of the side surfaces of the battery can that forms a concave portion.
The drawing direction 7 and the lower end 11 on the opposite side of the drawing have the same thickness as the concave portion.
【００２２】図５（Ｅ）に示す雌型金型５は、電池缶の
側面の一方の面に複数個の凹部を形成するものであり、
複数個の凹状部６ａ、６ｂを形成し、凹状部６の引出方
向７およびその反対側の下端部１１は、いずれも凹状部
と同じ厚さとしたものである。図５（Ｆ）に示す雌型金
型５は、電池缶の側面の一方の面に複数個の凹部を形成
するものであり、断面が三角形状の複数個の凹状部６
ａ、６ｂを形成し、凹状部６ａ、６ｂの引出方向７およ
びその反対側の下端部１１は、いずれも凹状部と同じ厚
さとしたものである。電池缶の側面の一方の面には、２
個の突起状の部分が形成され、突起状の部分によって電
池要素の膨張が制限される。また、断面が三角形状の凹
条部により電池缶の内面に形成される突起状の部分の電
池缶の開口と平行な面との断面は電池缶の壁面とは傾斜
面で結合している。その結果、滑らかな傾斜面が形成さ
れているので、電池缶内部への電池要素の挿入をより円
滑に行うことが可能となる。The female mold 5 shown in FIG. 5 (E) has a plurality of recesses formed in one of the side surfaces of the battery can.
A plurality of concave portions 6a and 6b are formed, and the drawing direction 7 of the concave portion 6 and the lower end portion 11 on the opposite side have the same thickness as the concave portion. The female mold 5 shown in FIG. 5 (F) has a plurality of concave portions formed on one of the side surfaces of the battery can, and a plurality of concave portions 6 having a triangular cross section.
a, 6b are formed, and the lower end 11 on the opposite side to the drawing direction 7 of the concave portions 6a, 6b is the same thickness as the concave portion. On one of the sides of the battery can, 2
Individual protruding portions are formed, and the protruding portions limit expansion of the battery element. Further, the cross section of the protruding portion formed on the inner surface of the battery can by the concave streak having a triangular cross section and the plane parallel to the opening of the battery can is joined to the wall surface of the battery can by an inclined surface. As a result, a smooth inclined surface is formed, so that the battery element can be more smoothly inserted into the battery can.
【００２３】図５（Ｇ）に示す雌型金型５は、電池缶の
側面の一方の面に複数個の凹部を形成するものであり、
断面が三角形状の複数個の凹状部６ａ、６ｂを形成し、
両凹状部の間に凹状部６ａあるいは６ｂよりも深さが浅
い底面が平坦な凹状部６ｃを形成したものである。引出
方向７およびその反対側の下端部１１は、いずれも凹状
部と同じ厚さとしたものである。電池缶の側面の一方の
面には、２個の突起状の部分が形成され、突起状の部分
によって電池要素の膨張が制限される。図５（Ｈ）に示
す雌型金型５は、電池缶の側面の一方の面に複数個の凹
部を形成するものであり、断面が三角形状の複数個の凹
状部６ａ、６ｂ、６ｄを形成し、それぞれの凹状部の間
に凹状部６ａ、６ｂあるいは６ｄよりも深さが浅い底面
が平坦な凹状部６ｃを形成したものである。引出方向７
およびその反対側の下端部１１は、いずれも凹状部と同
じ厚さとしたものである。電池缶の側面の一方の面に
は、３個の突起状の部分が形成され、突起状の部分によ
って電池要素の膨張が制限される。The female mold 5 shown in FIG. 5 (G) has a plurality of recesses formed in one of the side surfaces of the battery can.
A plurality of concave portions 6a and 6b having a triangular cross section are formed,
A concave portion 6c having a flat bottom surface and a depth smaller than that of the concave portion 6a or 6b is formed between the two concave portions. Both the drawing direction 7 and the lower end 11 on the opposite side have the same thickness as the concave portion. On one of the side surfaces of the battery can, two projecting portions are formed, and the projecting portions limit expansion of the battery element. The female mold 5 shown in FIG. 5 (H) has a plurality of recesses formed on one of the side surfaces of the battery can, and includes a plurality of recesses 6a, 6b, 6d having a triangular cross section. A concave portion 6c having a shallower bottom surface than the concave portions 6a, 6b or 6d is formed between the concave portions. Drawing direction 7
Also, the lower end 11 on the opposite side has the same thickness as the concave portion. On one of the side surfaces of the battery can, three projecting portions are formed, and the projecting portions limit expansion of the battery element.
【００２４】図５（Ｉ）に示す雌型金型５は、電池缶の
側面の一方の面に１個の凹部を形成するものであり、断
面が三角形状の複数個の凹状部６ａを形成し、凹状部６
ａの引出方向７およびその反対側の下端部１１は、いず
れも凹状部と同じ厚さとしたものである。電池缶の側面
の一方の面には、１個の突起状の部分が形成され、突起
状の部分によって電池要素の膨張が制限される。特にこ
の形状は製造が容易である。図５（Ｊ）に示す雌型金型
５は、電池缶の側面の一方の面に底面が平坦な凹部６ｃ
を形成し、さらに底面に断面が三角形状の複数個の凹状
部６ａを形成したものである。凹状部６ａの引出方向７
およびその反対側の下端部１１は、いずれも凹状部と同
じ厚さとしたものである。電池缶の側面の一方の面に
は、凹状部とその中央部に１個の突起状の部分が形成さ
れ、突起状の部分によって電池要素の膨張が制限され
る。The female mold 5 shown in FIG. 5 (I) has one concave portion formed on one of the side surfaces of the battery can, and has a plurality of concave portions 6a having a triangular cross section. And concave part 6
The drawing direction 7 of a and the lower end 11 on the opposite side have the same thickness as the concave portion. One protruding portion is formed on one of the side surfaces of the battery can, and the protruding portion limits expansion of the battery element. In particular, this shape is easy to manufacture. The female mold 5 shown in FIG. 5 (J) has a concave portion 6c having a flat bottom surface on one of the side surfaces of the battery can.
And a plurality of concave portions 6a having a triangular cross section are formed on the bottom surface. Drawing direction 7 of concave portion 6a
Also, the lower end 11 on the opposite side has the same thickness as the concave portion. On one side of the side surface of the battery can, a concave portion and one protruding portion are formed at the center thereof, and expansion of the battery element is limited by the protruding portion.
【００２５】[0025]
【実施例】以下に本発明の実施例を示し、本発明を説明
する。 実施例１ 縦４８ｍｍ、横３０ｍｍ、厚さ４．８ｍｍ、板厚０．３
ｍｍのアルミニウム板（Ａ３００３）からなる電池缶
に、凹部の下部が開放した雌型金型を用いて電池缶の側
面のそれぞれの面の中央に、幅１０ｍｍ、長さ２０ｍ
ｍ、深さ０．１５ｍｍの凹部を形成した。電池缶内に、
マンガン酸リチウム（Ｌｉ1+xＭｎ2-xＯ4 ）粉末９２重
量部、カーボンブラック５重量部、ポリフッ化ビニリデ
ン３重量部からなる混合物を、アルミニウム箔に塗布し
て乾燥した正極と、黒鉛化メソカーボンマイクロビーズ
（大阪ガス製 ＭＣＭＢ）９１重量部、カーボンブラッ
ク１重量部、ポリフッ化ビニリデン８重量部からなる混
合物を銅箔上に塗布して乾燥した負極を微多孔性ポリプ
ロピレン膜のセパレータを介して積層し、渦巻状に巻回
して作製した電池要素を電池缶に収容した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below by showing embodiments of the present invention. Example 1 Length 48 mm, width 30 mm, thickness 4.8 mm, thickness 0.3
In a battery can made of an aluminum plate (A3003) having a width of 10 mm and a length of 20 m, the center of each of the side surfaces of the battery can was formed using a female mold having an open lower portion of a concave portion.
m, a concave portion having a depth of 0.15 mm was formed. In the battery can,
A positive electrode obtained by applying a mixture consisting of 92 parts by weight of lithium manganate (Li 1 + x Mn 2-x O 4 ) powder, 5 parts by weight of carbon black, and 3 parts by weight of polyvinylidene fluoride to an aluminum foil and drying the mixture; A mixture of 91 parts by weight of mesocarbon microbeads (MCMB, manufactured by Osaka Gas), 1 part by weight of carbon black, and 8 parts by weight of polyvinylidene fluoride was applied on a copper foil and dried, and the dried negative electrode was passed through a microporous polypropylene membrane separator. The battery element produced by stacking and spirally winding was housed in a battery can.
【００２６】電池缶内に、エチレンカーボネート３０容
量部、ジエチルカーボネート７０容量部からなる混合溶
媒に濃度１．０ｍｏｌ／ｌとなるようにＬｉＰＦ6 を溶
解して作製した電解液を注入してリチウムイオン二次電
池を作製した。得られた電池の１００個の充電を行った
ところ、電池缶の側面の厚みの最大部分の厚みの平均値
は４．９６ｍｍであった。An electrolyte prepared by dissolving LiPF 6 in a mixed solvent consisting of 30 parts by volume of ethylene carbonate and 70 parts by volume of diethyl carbonate so as to have a concentration of 1.0 mol / l was injected into the battery can, and lithium ions were added. A secondary battery was manufactured. When 100 of the obtained batteries were charged, the average value of the maximum thickness of the side surface of the battery can was 4.96 mm.
【００２７】比較例１ 雌型金型として下部が開放していないものを用いた点を
除いて実施例１と同様にして電池を作製した。得られた
電池の２７０個の充電を行ったところ、電池缶の側面の
厚みの最大部分の厚みの平均値は５．１０ｍｍであっ
た。Comparative Example 1 A battery was fabricated in the same manner as in Example 1 except that a female mold was used that had not been opened at the bottom. When 270 batteries were charged, the average value of the maximum thickness of the side surface of the battery can was 5.10 mm.
【００２８】[0028]
【発明の効果】電池缶の側面に、少なくとも電池缶の底
面側の端部には段差を有さない傾斜面と平面部が結合し
た凹部を形成したことにより、凹部の形成に使用する雌
型金型の取り出しが容易であり、薄型の電池においても
電池缶に傷を生じたり、電池缶を変形することがない。
このようにして作製した電池缶を用いた電池は、凹部に
よって電池缶の側面の膨張を防止することが可能とな
る。The female mold used for forming the concave portion is formed on the side surface of the battery can at least at the end on the bottom side of the battery can by combining an inclined surface having no step and a flat portion. It is easy to remove the mold, and even in a thin battery, the battery can is not damaged or the battery can is not deformed.
In the battery using the battery can thus manufactured, the concave portion can prevent the side surface of the battery can from expanding.
【図１】図１は、本発明の角型電池の一実施例を説明す
る図である。FIG. 1 is a diagram illustrating one embodiment of a prismatic battery of the present invention.
【図２】図２は、本発明の角型電池の他の実施例を説明
する図である。FIG. 2 is a diagram illustrating another embodiment of the prismatic battery of the present invention.
【図３】図３は、本発明の角型電池の他の実施例を説明
する図である。FIG. 3 is a diagram illustrating another embodiment of the prismatic battery of the present invention.
【図４】図４は、本発明の電池缶の成形方法を説明する
図である。FIG. 4 is a diagram illustrating a method for forming a battery can according to the present invention.
【図５】図５は、本発明の角型電池の製造に使用するこ
とが可能な雌型金型の例を説明する図である。FIG. 5 is a diagram illustrating an example of a female mold that can be used for manufacturing the prismatic battery of the present invention.
【図６】図６は、従来の電池缶の変形を防止する電池缶
を説明する図である。FIG. 6 is a diagram illustrating a battery can that prevents deformation of a conventional battery can.
１…電池缶、２…側面、３，３ａ，３ｂ，３ｃ，３ｄ…
凹部、４…開口幅、５…雌型金型、６，６ａ，６ｂ，６
ｄ…凹状部、６ｃ…平坦な凹状部、７…引出方向、８…
雌型金型の壁部、９…上端部、１０…段差、１１…下端
部、１２…傾斜面、１３…薄肉部、１４…雄型金型、１
５…凸状部、１６…反対側の端部、１７…凹状部傾斜
面、１８…凸状部傾斜面1 ... battery can, 2 ... side surface, 3, 3a, 3b, 3c, 3d ...
Recess, 4 ... opening width, 5 ... female mold, 6, 6a, 6b, 6
d: concave portion, 6c: flat concave portion, 7: drawing direction, 8 ...
Wall of female mold, 9: upper end, 10: step, 11: lower end, 12: inclined surface, 13: thin part, 14: male mold, 1
5: convex portion, 16: opposite end portion, 17: concave portion inclined surface, 18: convex portion inclined surface
Claims (1)
介して積層した電池要素あるいは正極電極および負極電
極をセパレータを介して巻回した扁平状の電池要素を収
納した角型電池において、電池要素の積層面あるいは扁
平面に平行な電池缶側面の少なくとも一方の面には、少
なくとも電池缶の底面側の端部には段差を有さない傾斜
面からなる凹部を有することを特徴とする角型電池。The present invention relates to a battery element in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween, or a rectangular battery in which a flat battery element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween is housed. A prismatic battery characterized in that at least one surface of a battery can side parallel to a surface or a flat surface has a concave portion formed of an inclined surface having no step at least at an end on the bottom side of the battery can.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001038433A JP3725433B2 (en) | 2001-02-15 | 2001-02-15 | Square battery and method of manufacturing the same |
| TW091102065A TW529192B (en) | 2001-02-15 | 2002-02-06 | Square battery |
| CNB021046638A CN1246924C (en) | 2001-02-15 | 2002-02-10 | Square battery |
| KR1020020007906A KR20020067648A (en) | 2001-02-15 | 2002-02-14 | Square-shaped battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001038433A JP3725433B2 (en) | 2001-02-15 | 2001-02-15 | Square battery and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002245975A true JP2002245975A (en) | 2002-08-30 |
| JP3725433B2 JP3725433B2 (en) | 2005-12-14 |
Family
ID=18901403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001038433A Expired - Lifetime JP3725433B2 (en) | 2001-02-15 | 2001-02-15 | Square battery and method of manufacturing the same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3725433B2 (en) |
| KR (1) | KR20020067648A (en) |
| CN (1) | CN1246924C (en) |
| TW (1) | TW529192B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100490538B1 (en) * | 2002-09-03 | 2005-05-17 | 삼성에스디아이 주식회사 | Battery |
| JP2005243274A (en) * | 2004-02-24 | 2005-09-08 | Toshiba Corp | Non-aqueous prismatic secondary battery |
| JP2006040879A (en) * | 2004-07-29 | 2006-02-09 | Samsung Sdi Co Ltd | Lithium ion secondary battery, case for lithium ion secondary battery, and method for producing lithium ion secondary battery |
| JP2007220413A (en) * | 2006-02-15 | 2007-08-30 | Sanyo Electric Co Ltd | Square battery |
| KR100788555B1 (en) | 2006-02-27 | 2007-12-26 | 삼성에스디아이 주식회사 | Secondary battery |
| JP2008091252A (en) * | 2006-10-03 | 2008-04-17 | Gs Yuasa Corporation:Kk | Battery and its manufacturing method |
| US20080102364A1 (en) * | 2006-10-25 | 2008-05-01 | Hwail Uh | Prismatic can type lithium ion rechargeable battery |
| JP2008130371A (en) * | 2006-11-21 | 2008-06-05 | Sanyo Electric Co Ltd | Battery case, non-aqueous electrolyte secondary battery including the battery case, and method for manufacturing the non-aqueous electrolyte secondary battery |
| US20080241673A1 (en) * | 2007-03-30 | 2008-10-02 | Sanyo Electric Co., Ltd. | Prismatic cell |
| CN100466335C (en) * | 2004-11-29 | 2009-03-04 | 三星Sdi株式会社 | Battery case and battery using same |
| JP2011187288A (en) * | 2010-03-08 | 2011-09-22 | Hitachi Maxell Energy Ltd | Sealed battery |
| JP2013118152A (en) * | 2011-12-05 | 2013-06-13 | Toyota Motor Corp | Method of manufacturing battery |
| US9812673B2 (en) | 2014-01-20 | 2017-11-07 | Samsung Sdi Co., Ltd. | Battery pack |
| JP2018085180A (en) * | 2016-11-21 | 2018-05-31 | トヨタ自動車株式会社 | Lithium ion secondary battery |
| US10147910B2 (en) | 2014-04-16 | 2018-12-04 | Samsung Sdi Co., Ltd. | Battery pack |
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| JP2023514326A (en) * | 2020-02-21 | 2023-04-05 | ビーワイディー カンパニー リミテッド | Battery cases, batteries, battery packs, battery modules and vehicles |
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|---|---|---|---|---|
| KR100898677B1 (en) | 2007-03-07 | 2009-05-22 | 삼성에스디아이 주식회사 | Square Lithium Ion Battery |
| CN102427114A (en) * | 2011-12-02 | 2012-04-25 | 苏州冠硕新能源有限公司 | Battery and battery shell |
| KR102332442B1 (en) | 2015-06-19 | 2021-11-29 | 삼성에스디아이 주식회사 | Rechargeable battery module |
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-
2001
- 2001-02-15 JP JP2001038433A patent/JP3725433B2/en not_active Expired - Lifetime
-
2002
- 2002-02-06 TW TW091102065A patent/TW529192B/en not_active IP Right Cessation
- 2002-02-10 CN CNB021046638A patent/CN1246924C/en not_active Expired - Lifetime
- 2002-02-14 KR KR1020020007906A patent/KR20020067648A/en not_active Abandoned
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100490538B1 (en) * | 2002-09-03 | 2005-05-17 | 삼성에스디아이 주식회사 | Battery |
| JP2005243274A (en) * | 2004-02-24 | 2005-09-08 | Toshiba Corp | Non-aqueous prismatic secondary battery |
| JP2006040879A (en) * | 2004-07-29 | 2006-02-09 | Samsung Sdi Co Ltd | Lithium ion secondary battery, case for lithium ion secondary battery, and method for producing lithium ion secondary battery |
| US8895167B2 (en) | 2004-07-29 | 2014-11-25 | Samsung Sdi Co., Ltd. | Secondary battery having casing for preventing volumetric expansion |
| CN100466335C (en) * | 2004-11-29 | 2009-03-04 | 三星Sdi株式会社 | Battery case and battery using same |
| JP2007220413A (en) * | 2006-02-15 | 2007-08-30 | Sanyo Electric Co Ltd | Square battery |
| KR100788555B1 (en) | 2006-02-27 | 2007-12-26 | 삼성에스디아이 주식회사 | Secondary battery |
| JP2008091252A (en) * | 2006-10-03 | 2008-04-17 | Gs Yuasa Corporation:Kk | Battery and its manufacturing method |
| US20080102364A1 (en) * | 2006-10-25 | 2008-05-01 | Hwail Uh | Prismatic can type lithium ion rechargeable battery |
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| US9812673B2 (en) | 2014-01-20 | 2017-11-07 | Samsung Sdi Co., Ltd. | Battery pack |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1371140A (en) | 2002-09-25 |
| CN1246924C (en) | 2006-03-22 |
| TW529192B (en) | 2003-04-21 |
| JP3725433B2 (en) | 2005-12-14 |
| KR20020067648A (en) | 2002-08-23 |
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