KR20240177560A - Electrode assembly manufacturing equipment and manufacturing method for electrode assembly - Google Patents

Abstract

The present invention relates to an electrode assembly manufacturing device and an electrode assembly manufacturing method.

Description

{ELECTRODE ASSEMBLY MANUFACTURING EQUIPMENT AND MANUFACTURING METHOD FOR ELECTRODE ASSEMBLY}

The present invention relates to an electrode assembly manufacturing device and an electrode assembly manufacturing method.

Secondary batteries, unlike primary batteries, are rechargeable and have the potential to be made small and large-capacity, so they have been researched and developed extensively in recent years. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.

Secondary batteries are classified into coin-shaped batteries, cylindrical batteries, square batteries, and pouch-shaped batteries according to the shape of the battery case. In a secondary battery, the electrode assembly mounted inside the battery case is a power generation element capable of charging and discharging, which is composed of a laminated structure of electrodes and a separator.

Electrode assemblies can be roughly classified into a jelly-roll type in which a separator is interposed between sheet-shaped positive and negative electrodes coated with active materials and wound, a stack type in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed between them, and a stack-and-folding type in which stack-type unit cells are wound with a long separator film.

In order to manufacture an electrode assembly, a separator including an adhesive binder can be used. An electrode assembly including such a separator can be heated and pressurized to bond the electrode and the separator. Through this, the laminated structure of the electrode and separator constituting the electrode assembly can be stable.

However, during the process of heating and pressurizing the electrode assembly to bond the electrode and separator, a problem occurred in which the adhesive strength of the electrode and separator was small or the adhesive strength deviation was large due to the temperature difference of the electrode.

Therefore, research is needed to increase the adhesive strength of the electrode and separator and reduce the deviation in the adhesive strength to manufacture an electrode assembly with uniform performance.

Korean Publication Patent No. 10-2013-0132230

The present invention provides an electrode assembly manufacturing device and an electrode assembly manufacturing method.

One embodiment of the present invention provides an electrode assembly manufacturing device including: a stack table on which an electrode assembly including a first electrode, a separator, and a second electrode is placed; a first electrode supply unit that heats the first electrode and supplies it to the stack table; a second electrode supply unit that heats the second electrode and supplies it to the stack table; a heat press unit that heats and presses the electrode assembly; a transfer unit that transfers the electrode assembly from the stack table to the heat press unit; a first temperature measuring unit that measures a surface temperature of the electrode assembly transferred to the transfer unit; and a heating unit that heats the electrode assembly when the surface temperature is lower than a first reference temperature.

In addition, one embodiment of the present invention provides a method for manufacturing an electrode assembly, including a first electrode supply step of heating a first electrode and supplying it to a stack table; a second electrode supply step of heating a second electrode and supplying it to the stack table; a stacking step of stacking an electrode assembly including the first electrode, a separator, and the second electrode on the stack table; a transfer step of holding and fixing the electrode assembly with a first gripper and then transferring the electrode assembly; a first temperature measuring step of measuring a surface temperature of the electrode assembly; and a heat press step of heating and pressurizing the electrode assembly, wherein the method includes a temperature compensation step of heating the electrode assembly when the surface temperature is lower than a first reference temperature.

The electrode assembly manufacturing device and electrode assembly manufacturing method according to the embodiment of the present application can shorten the time for manufacturing the electrode assembly.

The electrode assembly manufacturing device and electrode assembly manufacturing method according to the embodiment of the present application can reduce the temperature difference between electrodes during the manufacturing process, thereby providing an electrode assembly with excellent performance and uniformity.

Figure 1 is a diagram showing a conventional electrode assembly manufacturing process.
FIG. 2 is a diagram showing a process for manufacturing an electrode assembly according to one embodiment of the present invention.
FIGS. 3 and 4 are perspective views exemplarily showing a heating unit according to one embodiment of the present invention.
FIG. 5(a) is a perspective view illustrating a first press unit (50) according to one embodiment of the present invention, and FIG. 5(b) is a perspective view illustrating a second press unit (60) according to one embodiment of the present invention.
FIG. 6 is a diagram showing a process for manufacturing an electrode assembly according to one embodiment of the present invention.
Figure 7 is a cross-sectional view showing an electrode assembly in a zigzag stacked configuration as an example.

Hereinafter, the present invention will be described in detail so that a person having ordinary skill in the art to which the present invention pertains can easily practice it. However, the present invention can be implemented in various different forms and is not limited to the configuration described herein.

When it is said in this specification that a part "includes" a component, this does not exclude other components, but rather may include other components, unless otherwise specifically stated.

In this specification, a "holding mechanism" is a mechanism that performs a function of holding a laminated body on the stack table in order to stack the first electrode or the second electrode during the process of manufacturing a laminated body in which the first electrode, the separator, and the second electrode are alternately arranged between the separators folded on the stack table, and the function is different from that of a gripper that holds the laminated body during the process of heating and pressurizing the laminated body.

In this specification, “part” means an interface that performs a specific function within an electrode assembly manufacturing device.

In this specification, “a laminate including a first electrode, a separator, and a second electrode” may mean a state before heating and pressurizing an electrode assembly including a first electrode, a separator, and a second electrode.

In this specification, “n” is arbitrarily used to distinguish components having the same name, and does not have the meaning of limiting the order.

In this specification, the stacking in which the first electrode and the second electrode are alternately arranged between the folded separators is called zig zag stacking.

At this time, the form in which the first electrode and the second electrode are alternately arranged between the folded separators will be described more specifically. The folded separator may mean a separator in which the separators are overlapped and laminated in a zigzag shape. More specifically, the separators are laminated in a zigzag shape while being folded in a form that alternately reciprocates between the left and right sides of the lamination axis based on the lamination axis. In addition, it means that the first electrode and the second electrode are laminated in a form in which they are alternately arranged between the laminated separators. Here, the lamination axis means an imaginary axis that is parallel to the direction in which the first electrode, the separator, and the second electrode are laminated, and passes through the center of the laminate in which the electrodes and the separator are laminated.

That is, the meaning of the first electrode and the second electrode being alternately arranged between the separators means that the separators are overlapped in a zigzag shape and are laminated in the direction of the lamination axis, and the first electrode and the second electrode are alternately laminated one by one in the space (between the separators) created when the separators are overlapped.

Hereinafter, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

<Electrode assembly manufacturing device>

Conventionally, to manufacture an electrode assembly as shown in Fig. 1, a stacking step is performed to manufacture a laminate including electrodes and a separator on a stack table, and a winding step is performed to wrap the electrode assembly with a separator.

The electrode assembly is manufactured by carrying out a heat press step of heating and pressurizing the laminate in a heat press section through a transfer step of transferring the electrode assembly, which has completed winding, to a first gripper. At this time, in order to shorten the time for heating and pressurizing the laminate in the heat press section, the electrode is supplied while being heated.

However, a problem occurred in which the temperature of the heated electrodes rapidly decreased during the process of transferring them from the stack table to the heat press section. In other words, the time required for the heat press increased, thereby increasing the process time.

In addition, due to temperature unevenness, problems such as uneven adhesion between the electrode and separator, and uneven compressibility of the separator may occur.

Accordingly, the present invention provides an electrode assembly manufacturing device including a heating unit that compensates for the surface temperature of the electrode assembly according to the surface temperature of the electrode assembly.

The electrode assembly manufacturing device according to the present invention can perform a temperature compensation step of compensating the surface temperature of the electrode assembly by a heating unit according to the surface temperature of the electrode assembly during the transfer step while performing the stacking step; winding step; transfer step; and heat pressing step in the same manner as before, as shown in FIG. 2.

Through this, the problem that occurs due to the temperature of the heated electrodes rapidly decreasing during the process of transferring them from the stack table to the heat press section can be resolved. As a result, electrode assemblies with excellent performance can be quickly produced.

In one embodiment of the present invention, the transfer unit and the heating unit each include a first gripper and a second gripper, and an area where the first gripper grips the electrode assembly and an area where the second gripper grips the electrode assembly may be different from each other.

In one embodiment of the present invention, the first gripper includes a first gripper body; and two or more first fixing parts provided on one surface of the first gripper body to grip an electrode assembly, the second gripper includes a second gripper body; and two or more second fixing parts provided on one surface of the second gripper body to grip an electrode assembly, and the second fixing parts may include a heat source.

In one embodiment of the present invention, the first fixing part and the second fixing part may be interlocked with each other. Since the first fixing part and the second fixing part have an interlocked structure, all surfaces of the laminate can be evenly heated, thereby reducing the temperature deviation of the laminate. In other words, an electrode assembly with uniform performance can be produced.

As shown in FIG. 3, the heating unit (70) includes a second gripper (71, 72), and the second gripper may include a heat source (not shown). That is, the second grippers (71, 72) are formed as a pair and can grip the electrode assembly (10), and heat the electrode assembly with a heat source included in the gripper. The heat source may be included in at least one of the pair of grippers. In addition, a portion not gripped by the second gripper (71, 72) in the portion indicated by the dotted line in FIG. 3 may be gripped by the first gripper (not shown). That is, the first gripper and the second gripper may be interlocked.

More specifically, as shown in Fig. 4, when looking at the heating part (70) in the direction A, the second grippers (71, 72) each have a structure including a second gripper body; and second fixing parts (71a1 to a3, 71b1 to b3, 71c1 to c3, 72 a1 to a3, 72 b1 to b3, 72c1 to c3) provided on one surface of the second gripper body.

More specifically, the second fixing member may be composed of a pair of substrates (71a1 to a3, 71c1 to c3 / 72a1 to a3, 72c1 to c3) and a heat source (71b1 to b3, 72b1 to b3) placed between the substrates. That is, the substrates perform the function of holding and fixing the electrode assembly (10), and the heat source performs the function of heating the electrode assembly (10).

In Figures 3 and 4, the second fixed part is shown as having three members, but this is only an example, and cases where there are two or three or more members are also possible.

In one embodiment of the present invention, the substrate may be a metal plate. That is, in one embodiment of the present invention, the second fixing member may include a first metal plate; a second metal plate; and the heat source disposed between the first metal plate and the second metal plate.

In one embodiment of the present invention, the heat source may be a thermoelectric device that converts electrical energy into heat energy. More specifically, the heat source may be a non-contact heat source.

In one embodiment of the present invention, the non-contact heat source is not limited to a radiant heat source, an induction heating heat source, or a laser heat source, and an appropriate heat source can be selected depending on the environment to which it is applied.

In one embodiment of the present invention, the non-contact heat source may include a heating element that provides heat to the unit electrode and a negative housing that stores the heating element so that it does not physically contact the unit electrode.

In one embodiment of the present invention, the non-contact heat source may be a non-contact infrared heater (IR heater).

In one embodiment of the present invention, the non-contact heat source may have various shapes such as a circle or a bar shape, and may have a shape in which one or more heat sources are arranged.

By using a non-contact heat source, there is an advantage in that it is easy to selectively heat the unit electrode only when necessary, and the unit electrode can be quickly heated to the desired temperature.

An electrode assembly manufacturing device according to one embodiment of the present invention may further include a second temperature measuring unit that measures the surface temperature of the electrode assembly heated by the heating unit; and a control unit that stops heating of the heating unit when the surface temperature is higher than the second reference temperature.

In one embodiment of the present invention, the first temperature measuring unit and the second temperature measuring unit may be non-contact temperature measuring devices.

In one embodiment of the present invention, the heat press unit may further include a pair of press blocks and a press heater for heating the press blocks.

In one embodiment of the present invention, the pair of pressurizing blocks may include the press heater inside.

In one embodiment of the present invention, the heat press unit may include a first heat press unit; and a second heat press unit. The first heat press unit may be used when performing the first heat press step described below, and the second heat press unit may be used in the second heat press step. may be performed by.

FIG. 5(a) is a perspective view illustrating a first press unit (50) according to one embodiment of the present invention, and FIG. 5(b) is a perspective view illustrating a second press unit (60) according to one embodiment of the present invention.

Referring to Fig. 5(a), the first press unit (50) can heat and pressurize the electrode assembly (10) while fixing it with the first gripper (51). The first press unit (50) is composed of a pair of first press blocks (50a, 50b), and the pair of first press blocks (50a, 50b) have a pressurizing surface that is all flat except for a groove (52) having a shape corresponding to the first fixing portion (51b) of the first gripper (51).

The first gripper (51) may include a first gripper body (51a) that is provided to correspond to the length (x) and the height (y) of the electrode assembly (10) or is wider than the length (x) and the height (y) of the electrode assembly (10), and a first fixing part (51b) that is provided in multiple numbers on one side of the body (51a) and is provided in the shape of a pillar or plate along the width (z) direction of the electrode assembly (10). Here, the length (x) of the electrode assembly (10) may refer to the longest distance from one end of the electrode assembly (10) to the other, the height (y) may refer to the distance in the stacking direction of the electrode assembly (10), and the width (z) may refer to the distance horizontally across the upper surface of the electrode assembly (10).

The first fixing part (51b) can be positionally adjusted along the height direction of the main body (51a), so that the first fixing part (51b) can fix the electrode assembly (10) by coming into contact with the upper and lower surfaces of the electrode assembly (10). Thereafter, a pair of first press blocks (50a, 50b) included in the first press part (50) are moved in a direction facing each other and apply surface pressure to at least one of the electrode assembly (10) and the gripper (51), thereby bonding the electrode and the separator included in the electrode assembly (10).

Referring to Fig. 5(b), the second press unit (60) can finally heat and pressurize the electrode assembly (10) that has been primarily heated and pressurized by the first press unit (50). The second press unit (60) includes a pair of second press blocks (60a, 60b), and the pair of press blocks (61, 62) can move in a direction facing each other and pressurize the laminate (S) surface. In addition, the pair of second press blocks (60a, 60b) included in the second press unit (60) can be provided with a pressing surface that contacts and presses the electrode assembly (10) as a flat surface.

Fig. 5 shows a case where there are two first fixing parts (51b), but this is an example for showing the relationship with the second fixing part of the second gripper described above. That is, the case where there are two first fixing parts (51b) is not limited to this, and there may be two or more if the electrode assembly (10) can be gripped, and the number may be changed in relation to the number of second fixing parts of the second gripper described above.

In this specification, an electrode assembly manufacturing device according to one embodiment of the present invention may include a holding mechanism. Through this, the electrodes and separators stacked on the stack table can be prevented from being twisted.

An electrode assembly manufacturing device according to one embodiment of the present invention may include a configuration commonly used in the field, except that it includes a second gripper that performs the function of a heating buffer.

Hereinafter, a method for manufacturing an electrode assembly to which an electrode assembly manufacturing device according to one embodiment of the present invention can be applied will be described.

<Method for manufacturing electrode assembly>

The present invention provides a method for manufacturing an electrode assembly, including a temperature compensation step of heating the electrode assembly when the surface temperature is lower than a first reference temperature. The temperature compensation step can be performed by the heating unit described above.

The method for manufacturing an electrode assembly according to the present invention can also solve the problem that occurs due to the temperature of heated electrodes rapidly decreasing during the process of transferring them from the stack table to the heat press section as described above. As a result, an electrode assembly having excellent performance can be quickly produced.

In one embodiment of the present invention, the temperature compensation step includes: a step of holding and fixing the electrode assembly with a second gripper including a heat source; and a step of heating the electrode assembly with the second gripper, wherein a region where the first gripper holds the electrode assembly and a region where the second gripper holds the electrode assembly may be different from each other. As described above, the region where the first gripper holds the electrode assembly and the region where the second gripper holds the electrode assembly may be interlocked.

In one embodiment of the present invention, after the step of holding and fixing the electrode assembly with the second gripper, the step of releasing the fixation of the first gripper may be further included.

The method for manufacturing an electrode assembly according to the present invention may further include a second temperature measuring step for measuring a surface temperature of the electrode assembly heated in the temperature compensation step; and a temperature compensation stopping step for stopping heating of the electrode assembly when the surface temperature is equal to or higher than the second reference temperature.

That is, in one embodiment of the present invention, the temperature compensation step starts when the surface temperature of the electrode assembly is lower than the first reference temperature, and stops when the surface temperature of the electrode assembly is higher than the second reference temperature.

In one embodiment of the present invention, the first reference temperature may be 50°C and the second reference temperature may be 60°C, but is not limited thereto and may be changed depending on the electrode and separator used.

In one embodiment of the present invention, in the step of heating the electrode assembly with the second gripper, the first gripper can release its grip on the electrode assembly and move away from the electrode assembly. Through this, the area where the first gripper grips the electrode assembly can be exposed, and by measuring the temperature of the area, the second temperature measuring step can be performed.

In one embodiment of the present invention, a winding step of wrapping the electrode assembly with a separator may be further included.

More specifically, the method for manufacturing an electrode assembly according to the present invention includes, as shown in Fig. 2, a stacking step of stacking an electrode assembly including a first electrode, a separator, and a second electrode, similar to the conventional method; and a winding step of wrapping the electrode assembly with a separator. In this case, the electrode is supplied while being heated, similar to the conventional method.

Next, while performing the transfer step; and the heat press step, a temperature compensation step can be performed to compensate for the surface temperature of the electrode assembly by the heating unit according to the surface temperature of the electrode assembly.

As shown in Fig. 6, the above temperature compensation step is performed by transferring the electrode assembly (10) to the heat press unit (60) in a state where the first gripper (51) holds and fixes the electrode assembly (10) to perform heat pressing.

During the transfer process, the surface temperature of the electrode assembly (10) is measured. If the measured surface temperature is lower than the first reference temperature, the electrode assembly is heated by the heating unit (70).

Specifically, the heating unit (70) includes a second gripper (71, 72) including a heat source (not shown), and the second gripper holds and fixes the electrode assembly (10). At this time, as shown in Fig. 6, the first gripper (51) and the second gripper (71, 72) may be interlocked.

Next, the heat source included in the second gripper (70) of the heating unit (70) heats the electrode assembly (10). While the electrode assembly (10) is gripped and heated by the second gripper (70) of the heating unit (70), the first gripper (51) releases its grip on the electrode assembly, thereby exposing the area gripped by the first gripper (51).

The temperature of the area that the exposed first gripper (51) was gripping is measured to measure the surface temperature of the electrode assembly (10). If the measured surface temperature is higher than the second reference temperature, a temperature compensation stop step is performed to stop heating the electrode assembly (10) by the second gripper (71, 72) of the heating unit (70). The temperature compensation stop step can be controlled by the above-described control unit (not shown).

After the temperature compensation stop step is performed, the electrode assembly (10) is gripped again by the first gripper (51). That is, the first gripper (51) and the second gripper (71, 72) can be engaged again as shown in Fig. 6. Thereafter, the grip of the second gripper (71, 72) is released.

In this way, the electrode assembly (10) gripped only by the first gripper (51) is transferred to the heat press (60) to perform the heat press step. Fig. 6 shows an example in which only the heat press step corresponding to the second heat press is applied.

Additionally, the surface temperature of the electrode assembly (10) can be measured by a first temperature measuring unit (not shown) and a second temperature measuring unit (not shown), respectively.

In one embodiment of the present invention, the heat press step can be performed by the heat press unit.

In one embodiment of the present invention, the heat press step may include a first heat press step; and a second heat press step.

In one embodiment of the present invention, the first heat press step means heating and pressurizing the electrode assembly while holding and fixing the electrode assembly with the first gripper.

In one embodiment of the present invention, the second heat press step means heating and pressurizing the electrode assembly without holding the electrode assembly with the first gripper. That is, it means heating and pressurizing the electrode assembly while releasing the first gripper from holding the electrode assembly.

In one embodiment of the present invention, the heat press step may include: a step of moving the electrode assembly between a pair of press blocks, each of which includes a heater; a step of moving the pair of press blocks along the lamination axis so as to become close to each other and pressurizing the laminate; and a step of heating the laminate by a press heater included in the pair of press blocks. In this case, a case in which the electrode assembly is gripped by the first gripper as described above may be defined as a first heat press, and a case in which the electrode assembly is not gripped by the first gripper may be defined as a first heat press.

More specifically, in one embodiment of the present invention, the first heat press step may include a step of fixing the electrode assembly by pressing an upper surface of the electrode assembly using a first gripper; a step of moving the electrode assembly fixed by the first gripper between a pair of press blocks including a press heater; a step of pressing the electrode assembly while the pair of press blocks are moved in a direction facing each other along the stacking axis of the electrode assembly; and a step of heating the electrode assembly by the press heater.

In one embodiment of the present invention, the second heat press step may include: a step of stopping heating and pressurizing the electrode assembly after the first heat press step; a step of separating the first gripper from the electrode assembly; a step of moving the electrode assembly, from which the first gripper is separated, between a pair of press blocks including a press heater; a step of pressing the electrode assembly while the pair of press blocks are moved in a direction facing each other along the stacking axis of the electrode assembly; and a step of heating the electrode assembly by the press heater.

In one embodiment of the present invention, the pressurizing block used in the first heat press step may have a groove corresponding to the first gripper.

In one embodiment of the present invention, the step of separating the first gripper from the electrode assembly may include the step of stopping pressing the upper surface of the electrode assembly using the first gripper; and the step of separating the first gripper from the electrode assembly.

In one embodiment of the present invention, the heat press step can only proceed with the second heat press step. That is, the heat press step can be performed only when the grip of the first gripper is released.

In addition, in a method for manufacturing an electrode assembly according to an embodiment of the present invention, if the surface temperature of the electrode assembly measured in a fixed state by holding the electrode assembly with the first gripper is equal to or higher than the first reference temperature, the heat press step can be performed without applying the second gripper.

In one embodiment of the present invention, the stacking step may use a method commonly used in the relevant field.

In one embodiment of the present invention, the stacking step may be performing zigzag stacking.

That is, in one embodiment of the present invention, the electrode assembly may be in a zig-zag stacked form. To this end, a device in which the stack table moves left and right, a method in which the separator moves left and right, or a method in which the stack table rotates may be used, and a conventional technology in the relevant field may be applied to this.

At this time, while the first electrode, the second electrode, and the separator are added to the stack table and stacked, the stacked material on the stack table can be held by the holding mechanism. Through this, the alignment of the stacked material can be maintained during the stacking step.

The method for manufacturing an electrode assembly according to the present invention may be applied to a method commonly used in the relevant field, except that it includes a temperature compensation step and a step related to the temperature compensation step.

The description of the method for manufacturing an electrode assembly according to the present invention can also be applied to the device for manufacturing an electrode assembly according to the present invention, and vice versa.

<Electrode assembly>

One embodiment of the present invention provides an electrode assembly manufactured by the electrode assembly manufacturing device or the electrode assembly manufacturing method.

In one embodiment of the present invention, the electrode assembly may be in a zigzag stacked form.

As shown in Fig. 7, the electrode assembly (10) in a zigzag stacked form is a power plant capable of charging and discharging, and can be formed in a form in which a first electrode (11), a separator (14), and a second electrode (12) are alternately stacked and assembled. Here, the electrode assembly (10) can be in a form in which the separator (14) is folded in a zigzag form, and the first electrode (11) and the second electrode (12) are alternately arranged between the folded separators (14).

In one embodiment of the present invention, the first electrode may be an anode and the second electrode may be a cathode.

In one embodiment of the present invention, the first electrode may be a cathode and the second electrode may be an anode.

In one embodiment of the present invention, the length of the long side of the electrode assembly may be 500 mm or more. The long side of the electrode assembly means the length in the direction perpendicular to the supply direction of the separator supplied during the manufacture of the electrode assembly.

In one embodiment of the present invention, the negative electrode is manufactured by applying and drying negative electrode active material particles on a negative electrode current collector, and additional components such as a conductive material, a binder, a solvent, etc. may be further included as needed.

In one embodiment of the present invention, the positive electrode is manufactured by applying and drying positive electrode active material particles on a positive electrode current collector, and, if necessary, additional components such as a conductive material, a binder, a solvent, etc. may be further included.

In addition, in one embodiment of the present invention, the negative active material, positive active material, and additional components may be used without limitation as long as they are materials known in the art within the scope to which the above-described description applies.

Likewise, within the scope to which the above-described description applies, methods known in the art for manufacturing the cathode and anode can be used without limitation.

In one embodiment of the present invention, the separation membrane includes a porous polymer substrate and an organic/inorganic composite porous coating layer formed on at least one side of the polymer substrate, and the organic/inorganic composite porous coating layer may include particulate binder resins and inorganic particles.

Materials used in the above separation membrane may be conventional materials used in the relevant field, and methods for manufacturing the membrane may be used without limitation using methods known in the art.

In addition, the description of the electrode assembly manufacturing device according to the present invention and the configuration of the manufacturing device can also be applied to the manufacturing method according to the present invention and the electrode assembly manufactured by the manufacturing method according to the present invention.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations are possible within a scope that does not depart from the technical idea of the present invention described in the claims.

10: Electrode assembly
11: 1st electrode
12: Second electrode
14: Membrane
51: 1st gripper
51a: 1st gripper body
51b: 1st fixed part
180: Press Department
50: 1st Heat Press Section
50a. 50b: 1st pressurized block
51: 1st gripper
51a: 1st gripper body
51b: 1st fixed part
60: 2nd heat press section
60a. 60b: 2nd pressurized block
70: Heating section
71, 72: 2nd gripper
71a1~a3, 71c1~c3, 72a1~a3, 72c1~c3: Substrate
71b1~b3, 72b1~b3: Heat source

Claims (11)

A stack table on which an electrode assembly including a first electrode, a separator, and a second electrode is placed;
A first electrode supply unit for heating the first electrode and supplying it to the stack table;
A second electrode supply unit that heats the second electrode and supplies it to the stack table;
A heat press unit for heating and pressurizing the above electrode assembly;
A transfer unit for transferring the electrode assembly from the above stack table to the above heat press unit;
A first temperature measuring unit for measuring the surface temperature of an electrode assembly being transported to the above transport unit; and
An electrode assembly manufacturing device including a heating unit that heats the electrode assembly when the surface temperature is lower than a first reference temperature. In the first paragraph,
The above transfer unit and the above heating unit each include a first gripper and a second gripper,
An electrode assembly manufacturing device in which the region where the first gripper holds the electrode assembly and the region where the second gripper holds the electrode assembly are different from each other. In the second paragraph,
The first gripper comprises a first gripper body; and two or more first fixing parts provided on one surface of the first gripper body to grip the electrode assembly,
The second gripper comprises a second gripper body; and two or more second fixing parts provided on one surface of the second gripper body to hold the electrode assembly,
The second fixing part is an electrode assembly manufacturing device including a heat source. In the third paragraph,
An electrode assembly manufacturing device wherein the first fixing part and the second fixing part are interlocked with each other. In the third paragraph,
An electrode assembly manufacturing device, wherein the second fixing member comprises a first metal plate; a second metal plate; and the heat source disposed between the first metal plate and the second metal plate. In the first paragraph,
A second temperature measuring unit for measuring the surface temperature of the electrode assembly heated by the above heating unit; and
An electrode assembly manufacturing device further comprising a control unit that stops heating of the heating unit when the surface temperature is higher than the second reference temperature. A first electrode supply step for heating the first electrode and supplying it to the stack table;
A second electrode supply step for heating the second electrode and supplying it to the stack table;
A stacking step of stacking an electrode assembly including the first electrode, a separator, and the second electrode on the stack table;
A transport step of transporting the electrode assembly by gripping and fixing the electrode assembly with a first gripper;
A first temperature measuring step for measuring the surface temperature of the electrode assembly; and
Comprising a heat press step of heating and pressurizing the above electrode assembly,
A method for manufacturing an electrode assembly, comprising a temperature compensation step of heating the electrode assembly when the surface temperature is below a first reference temperature. In Article 7,
The above temperature compensation step
A step of holding and fixing the electrode assembly with a second gripper including a heat source; and a step of heating the electrode assembly with the second gripper,
A method for manufacturing an electrode assembly, wherein the region where the first gripper holds the electrode assembly and the region where the second gripper holds the electrode assembly are different from each other. In Article 8,
A method for manufacturing an electrode assembly, further comprising a step of releasing the fixation of the first gripper after the step of gripping and fixing the electrode assembly with a second gripper. In Article 7,
A second temperature measurement step for measuring the surface temperature of the electrode assembly heated in the above temperature compensation step; and
A method for manufacturing an electrode assembly further comprising a temperature compensation stop step for stopping heating of the electrode assembly when the surface temperature is equal to or higher than a second reference temperature. In Article 7,
A method for manufacturing an electrode assembly further comprising a winding step of wrapping the electrode assembly with a separator.