Secondary battery manufacturing apparatus and manufacturing method

Abstract

This secondary battery manufacturing apparatus for manufacturing an electrode assembly, in which electrodes and a separator are alternately stacked, comprises: a table on which the separator is placed; a pair of rollers that are located above the table and bend the separator into a zigzag shape so that a plurality of adhesion surfaces are formed on the separator; and a pair of coating members that are located on the left and right sides of the pair of rollers and apply an adhesive to the adhesion surfaces formed on the separator, wherein in the electrode assembly, the electrodes are adhered to the adhesion surfaces coated with the adhesive. In a secondary battery manufacturing process, the secondary battery manufacturing apparatus can manufacture an electrode assembly in which positive electrodes and negative electrodes are stacked while alternately adhered to a separator.

Description

Secondary battery manufacturing device and manufacturing method

[0001] The present invention relates to a secondary battery manufacturing device and manufacturing method for manufacturing an electrode assembly in which electrodes and separators are alternately laminated in a secondary battery manufacturing process.

[0002] In general, a secondary battery is a battery that converts external electrical energy into chemical energy, stores it, and then generates electricity when needed. Commonly used secondary batteries include lead-acid batteries, nickel-cadmium batteries (Ni-Cd), nickel-metal hydride batteries (NiMH), lithium-ion batteries (Li-ion), and lithium-ion polymer batteries (Li-ion polymer).

[0003] These secondary batteries are manufactured by applying an active material to the surface of an electrode current collector to form a positive electrode and a negative electrode, interposing a separator between them to form an electrode assembly, and then mounting the electrode assembly inside a cylindrical or square metal can or a pouch-shaped case made of aluminum laminate sheet. The electrode assembly is manufactured mainly by injecting or impregnating a liquid electrolyte or using a solid electrolyte.

[0004] Therefore, secondary batteries are charged and discharged by allowing ions of the electrolyte injected between the positive and negative electrodes, which are insulated by a separator, to move between the positive and negative electrodes.

[0005] The electrodes used in the positive and negative electrodes of these secondary batteries include an electrode body constituting the electrode and an electrode active material coated on the electrode body.

[0006] The above electrode body may be generally processed into a sheet, thin plate, or foil form using a metal with excellent conductivity, such as aluminum (Al) or copper (Cu).

[0007] An electrode film for forming an electrode assembly is manufactured in a form in which an active material is applied to a portion of the film and the electrode body is exposed in the remaining portion.

[0008] The exposed portion of the electrode body is processed to function as an electrode terminal for connecting the positive and negative electrodes to the outside when forming an electrode assembly (positive electrode, negative electrode, and separator).

[0009] In particular, there has been a recent need from consumers to increase the capacity of secondary batteries, and accordingly, research is being conducted to stack multiple electrodes when manufacturing electrode assemblies in the secondary battery manufacturing process.

[0010] However, when stacking multiple electrodes, the stacked electrodes may become warped, and the adhesive strength between the separator and the multiple electrodes may deteriorate. This may result in a deterioration in the quality of the secondary battery.

[0011] Therefore, a means is required to simplify the process while simultaneously ensuring the quality of the secondary battery by efficiently stacking multiple electrodes to manufacture an electrode assembly in the secondary battery manufacturing process.

[0012] The present invention provides a secondary battery manufacturing device and a manufacturing method, and more specifically, the purpose of the present invention is to provide a secondary battery manufacturing device and a manufacturing method for manufacturing an electrode assembly in which a positive electrode and a negative electrode are alternately bonded to a separator and laminated in a secondary battery manufacturing process.

[0013] In addition, the purpose is to provide a secondary battery manufacturing device and manufacturing method that can improve the quality of a secondary battery by improving the adhesive strength between a separator and an electrode through an adhesive applied to a separator in a structure of an electrode assembly in which a plurality of electrodes are stacked.

[0014] The problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0015] A secondary battery manufacturing device for manufacturing an electrode assembly in which electrodes and separators are alternately laminated, comprising: a table on which the separator is placed; a pair of rollers positioned on the upper portion of the table for bending the separator in a zigzag shape so that a plurality of adhesive surfaces are formed on the separator; and a pair of application members positioned on both left and right sides of the pair of rollers for applying an adhesive to the adhesive surfaces formed on the separator, wherein the electrode assembly is characterized in that the electrode is adhered to the adhesive surfaces on which the adhesive is applied.

[0016] The above pair of application members may include a plurality of nozzles that apply the adhesive to the bonding surface in the form of a dot array.

[0017] The electrode may include a positive electrode and a negative electrode, and the plurality of adhesive surfaces may include a first adhesive surface to which the positive electrode is adhered and a second adhesive surface to which the negative electrode is adhered.

[0018] The separator may have one side bent so that the positive electrode is adhered to the first adhesive surface and covers the positive electrode, and the other side bent so that the negative electrode is adhered to the second adhesive surface and covers the negative electrode.

[0019] The above adhesive can be applied to the bonding surface in an amount of 0.01 g / m² or more and 13 g / m² or less.

[0020] The electrode assembly includes an electrolyte injected between the electrode and the separator, and the applied adhesive may be 0.03 wt% or more and 0.37 wt% or less based on the capacity of the injected electrolyte.

[0021] The above adhesive includes a pressure sensitive adhesive (PSA), and the pressure sensitive adhesive may include an acrylic or olefin series material.

[0022] The above table or the above pair of rollers can move back and forth in the left and right directions.

[0023] The above separator may include a ceramic coated separator (CCS) having a ceramic coating on its surface.

[0024] A method for manufacturing a secondary battery for manufacturing an electrode assembly in which electrodes and separators are alternately laminated is provided, comprising: a step of placing the separator on a table; a step of bending the separator in a zigzag shape so that a plurality of adhesive surfaces are formed on the separator through a pair of rollers positioned on the upper portion of the table; a step of applying an adhesive to the adhesive surfaces formed on the separator through a pair of application members positioned on both left and right sides of the pair of rollers; and a step of adhering the electrode to the adhesive surfaces on which the adhesive has been applied.

[0025] The step of applying an adhesive to the bonding surface formed on the above separator may apply the adhesive to the bonding surface in an amount of 0.01 g / m² or more and 13 g / m² or less.

[0026] The method further includes a step of injecting an electrolyte between the electrode and the separator, and the applied adhesive may be in an amount of 0.03 wt% or more and 0.37 wt% or less relative to the capacity of the injected electrolyte.

[0027] The method further includes a step of applying pressure from the upper portion of the electrode assembly toward the lower portion, wherein the adhesive includes a pressure sensitive adhesive (PSA), and the pressure sensitive adhesive may include an acrylic or olefin-based material.

[0028] The step of applying an adhesive to the bonding surface formed on the above separator may apply the adhesive to the bonding surface in the form of a dot array through a plurality of nozzles included in the pair of application members.

[0029] The secondary battery manufacturing device and manufacturing method according to the present invention can manufacture an electrode assembly in which a positive electrode and a negative electrode are alternately bonded to a separator and laminated in a secondary battery manufacturing process.

[0030] In addition, in the structure of an electrode assembly in which multiple electrodes are stacked, the adhesive applied to the separator can improve the adhesion between the separator and the electrode, thereby improving the quality of the secondary battery.

[0031] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention belongs from the description below.

[0032] FIG. 1 is a drawing illustrating an electrode assembly in which electrodes and separators are alternately laminated in a secondary battery manufacturing device according to one embodiment of the present invention.

[0033] FIG. 2 is a perspective view illustrating a secondary battery manufacturing device according to one embodiment of the present invention.

[0034] FIG. 3 and FIG. 4 are drawings illustrating a shape in which a separator is bent in a zigzag shape through a pair of rollers in a secondary battery manufacturing device according to one embodiment of the present invention.

[0035] Figure 5 is experimental data related to the amount of adhesive applied to the bonding surface in a secondary battery manufacturing device according to one embodiment of the present invention.

[0036] FIG. 6 is a drawing for explaining a method for manufacturing a secondary battery according to one embodiment of the present invention.

[0037] FIG. 7 is a drawing for explaining a method of alternately bonding a positive electrode and a negative electrode to a separator in a method for manufacturing a secondary battery according to one embodiment of the present invention.

[0038] Figure 8 is a drawing for explaining another embodiment of the secondary battery manufacturing method of the present invention.

[0039] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably only for the convenience of writing the specification, and do not in themselves have distinct meanings or roles. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, a detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0040] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0041] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0042] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0043] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0044] FIG. 1 is a drawing showing an electrode assembly (110) in which electrodes (111, 112) and a separator (113) are alternately stacked in a secondary battery manufacturing device (100) according to one embodiment of the present invention. FIG. 2 is a perspective view showing a secondary battery manufacturing device (100) according to one embodiment of the present invention. FIG. 3 and FIG. 4 are drawings showing a shape in which a separator (113) is bent in a zigzag shape by a pair of rollers (130) in a secondary battery manufacturing device (100) according to one embodiment of the present invention. And FIG. 5 is experimental data related to the amount of adhesive (150) applied to bonding surfaces (113a, 113b) in a secondary battery manufacturing device (100) according to one embodiment of the present invention.

[0045] Hereinafter, in describing a secondary battery manufacturing device (100) according to one embodiment of the present invention, the left-right direction will be described based on the x-axis direction, the up-down direction will be described based on the y-axis direction, and the forward and backward directions will be described based on the z-axis direction.

[0046] Referring to FIGS. 1 and 2 together, a secondary battery manufacturing device (100) according to one embodiment of the present invention is a device for manufacturing an electrode assembly (110) in which electrodes (111, 112) and a separator (113) are alternately laminated, and may include a table (120) on which a separator (113) is placed, a pair of rollers (130) positioned on the upper portion of the table (120), and a pair of application members (140) positioned on both left and right sides of the pair of rollers (130).

[0047] A pair of rollers (130) may serve to bend the separator (113) in a zigzag shape so that a plurality of adhesive surfaces (113a, 113b) are formed on the separator (113). In addition, a pair of application members (140) may serve to apply an adhesive (150) to the adhesive surfaces (113a, 113b) formed on the separator (113). Through this, an electrode assembly (110) in which electrodes (111, 112) are adhered to the adhesive surfaces (113a, 113b) on which the adhesive (150) is applied, and the electrodes (111, 112) and the separator (113) are alternately laminated may be manufactured.

[0048] More specifically, in the secondary battery manufacturing device (100) according to one embodiment of the present invention, the electrodes (111, 112) may include a positive electrode (111) and a negative electrode (112). In addition, the plurality of adhesive surfaces (113a, 113b) may include a first adhesive surface (113a) to which the positive electrode (111) is adhered and a second adhesive surface (113b) to which the negative electrode (112) is adhered. At this time, a pair of application members (140) may include a plurality of nozzles (141) that apply an adhesive (150) in a dot array form to the adhesive surfaces (113a, 113b). In addition, the table (120) or a pair of rollers (130) may reciprocate in the left-right direction (x-axis direction).

[0049] Therefore, referring to FIGS. 1 to 4 together, the secondary battery manufacturing device (100) according to one embodiment of the present invention can form a first adhesive surface (113a) by moving a pair of rollers (130) to the right so that the separator (113) is bent. Then, an adhesive (150) can be applied in a dot array form to the first adhesive surface (113a) through a plurality of nozzles (141) of the application member (140). Thereafter, a positive electrode (111) can be adhered to the first adhesive surface (113a). Here, the positive electrodes (111) are stacked on the left side of the table (120) as illustrated in FIG. 1, and can be sequentially transferred from the positive electrode (111) located at the uppermost side through a separate transfer device (not illustrated).

[0050] After the positive electrode (111) is adhered to the first adhesive surface (113a), a pair of rollers (130) may move to the left so that the separator (113) may be bent to form a second adhesive surface (113b). Then, an adhesive (150) may be applied in a dot array form to the second adhesive surface (113b) through a plurality of nozzles (141) of the application member (140). Thereafter, a negative electrode (112) may be adhered to the second adhesive surface (113b). Here, the negative electrodes (112) are stacked on the right side of the table (120) as illustrated in FIG. 1, and may be sequentially transferred from the negative electrode (112) located at the uppermost side through a separate transfer device (not illustrated).

[0051] And, the secondary battery manufacturing device (100) according to one embodiment of the present invention can manufacture an electrode assembly (110) in which a positive electrode (111) and a negative electrode (112) are alternately laminated on a separator (113) by repeating the above-described process.

[0052] In addition, the above-described process is only one embodiment of the present invention and is not limited thereto. That is, the positive electrode (111) may be laminated on the right side of the table (120), and the negative electrode (112) may be laminated on the left side of the table (120). In addition, the negative electrode (112) may be adhered to the first adhesive surface (113a), and the positive electrode (111) may be adhered to the second adhesive surface (113b). In addition, the positions of a pair of rollers (130) may be fixed, and the table (120) may reciprocate in the left-right direction (x-axis direction) so that the separator (113) may be bent in a zigzag shape.

[0053] Here, when manufacturing an electrode assembly (110) in which a plurality of electrodes (111, 112) are laminated, a problem may occur in which the laminated plurality of electrodes (111, 112) become warped or the adhesive strength between the separator (113) and the plurality of electrodes (111, 112) is reduced, which results in a deterioration in the quality of the secondary battery.

[0054] Accordingly, the secondary battery manufacturing device (100) according to one embodiment of the present invention applies an adhesive (150) in a dot array form to an adhesive surface (113a, 113b) through a plurality of nozzles (141) and attaches electrodes (111, 112) to the adhesive surface (113a, 113b) to which the adhesive (150) has been applied, thereby manufacturing an electrode assembly (110), thereby efficiently stacking a plurality of electrodes (111, 112) to simplify the process while simultaneously ensuring the quality of the secondary battery.

[0055] Additionally, the secondary battery manufacturing device (100) according to one embodiment of the present invention may involve a process of applying pressure from the top to the bottom of the electrode assembly (110) through a separate pressurizing device (not shown) after the positive electrode (111) and the negative electrode (112) are alternately laminated on the separator (113). In addition, the device may involve a process of injecting an electrolyte between the electrodes (111, 112) and the separator (113). Here, the electrolyte may play a role in allowing charging and discharging of the secondary battery through the movement of ions between the positive electrode (111) and the negative electrode (112) insulated by the separator (113).

[0056] At this time, since the secondary battery manufacturing device (100) according to one embodiment of the present invention manufactures an electrode assembly (110) in which a plurality of electrodes (111, 112) are laminated in order to meet the needs of a consumer for increasing the capacity of a secondary battery, the capacity of the secondary battery should not decrease even when the adhesive (150) described above is applied. Here, the decrease in the capacity of the secondary battery may be affected by the amount of the adhesive (150) applied.

[0057] Accordingly, the secondary battery manufacturing device (100) according to one embodiment of the present invention can apply an adhesive (150) to the bonding surfaces (113a, 113b) in an amount of 0.01 g / m² or more and 13 g / m² or less. In addition, the applied adhesive (150) can be 0.03 wt% or more and 0.37 wt% or less relative to the capacity of the electrolyte described above.

[0058] FIG. 5 is experimental data related to the amount of adhesive (150) applied to the bonding surfaces (113a, 113b) in the secondary battery manufacturing device (100) according to one embodiment of the present invention. As illustrated in (a) of FIG. 5, when 0.1 g / m², 0.3 g / m², and 1.3 g / m² of adhesive (150) are applied to the bonding surfaces (113a, 113b) compared to a reference (Ref.) in which no adhesive (150) is applied, it can be seen that there is little change in the capacity of the secondary battery. That is, even when 0.1 g / m² to 1.3 g / m² of adhesive (150) is applied to the bonding surfaces (113a, 113b), it is possible to manufacture an electrode assembly (110) in which a plurality of electrodes (111, 112) are stacked as described above while minimizing the decrease in the capacity of the secondary battery.

[0059] In addition, as shown in (b) of Fig. 5, in the experimental data in which the process of repeating charging and discharging (Cycle) was performed more than 100 times, it can be seen that the change in capacity of the secondary battery is minimal when 1.3 g / m² of adhesive (150) is applied to the bonding surface (113a, 113b) compared to the reference (Ref.) in which no adhesive (150) is applied.

[0060] And the amount of the above-described adhesive (150) applied to the bonding surface (113a, 113b) may be 0.03 wt% or more and 0.37 wt% or less relative to the capacity of the electrolyte. Through this, the influence on the electrolyte moving between the positive electrode (111) and the negative electrode (112) insulated by the separator (113) can be minimized, thereby maintaining the quality of the secondary battery without reducing the capacity of the secondary battery.

[0061] In addition, in the secondary battery manufacturing device (100) according to one embodiment of the present invention, the adhesive (150) may include a pressure sensitive adhesive (PSA). And the pressure sensitive adhesive may include an acrylic or olefin series material.

[0062] This is to respond to the process temperature required when pressurizing the electrode assembly (110) from the top to the bottom through the above-described separate pressurizing device (not shown). That is, the pressure-sensitive adhesive including an acrylic or olefin-based material can maintain a certain viscosity and a certain elasticity at the process temperature (about 40 degrees to about 180 degrees) during the pressurizing process. In addition, this can play a role in securing the adhesive force between the separator (113) and the electrodes (111, 112).

[0063] Through this, the secondary battery manufacturing device (100) according to one embodiment of the present invention can solve the problem of the plurality of electrodes (111, 112) being warped or the adhesive strength between the separator (113) and the plurality of electrodes (111, 112) being reduced when manufacturing an electrode assembly (110) in which the plurality of electrodes (111, 112) are stacked. Therefore, the quality of the secondary battery can be secured.

[0064] In addition, in the secondary battery manufacturing device (100) according to one embodiment of the present invention, the separator (113) may include a ceramic coated separator (CCS) having a ceramic coating on the surface. Through this, thermal performance, such as preventing shrinkage due to heat, can be secured, and there is an advantage of reducing the manufacturing cost when manufacturing the electrode assembly (110).

[0065] FIG. 6 is a diagram illustrating a method for manufacturing a secondary battery according to one embodiment of the present invention. FIG. 7 is a diagram illustrating a method for alternately bonding a positive electrode and a negative electrode to a separator in a method for manufacturing a secondary battery according to one embodiment of the present invention. FIG. 8 is a diagram illustrating another embodiment of a method for manufacturing a secondary battery according to the present invention.

[0066] Hereinafter, reference will be made to FIGS. 1 to 5 described above to explain a method for manufacturing a secondary battery according to one embodiment of the present invention.

[0067] A secondary battery manufacturing method according to one embodiment of the present invention for manufacturing an electrode assembly (110) in which electrodes (111, 112) and a separator (113) are alternately laminated includes: a separator (113) is placed on a table (120) (S110), and a pair of rollers (130) are used to bend the separator (113) in a zigzag shape so that a plurality of adhesive surfaces (113a, 113b) are formed on the separator (113) (S120). After that, an adhesive (150) is applied to the bonding surface (113a, 113b) formed on the separator (113) through a pair of application members (140) (S130), and an electrode (111, 112) is bonded to the bonding surface (113a, 113b) to which the adhesive (150) is applied (S140), thereby manufacturing an electrode assembly (110).

[0068] At this time, a more specific method for manufacturing the electrode assembly (110) will be described. As illustrated in FIG. 7, first, a pair of rollers (130) may move to the right to bend the separator (113) and form a first adhesive surface (113a) (S210). Then, an adhesive (150) may be applied in a dot array form to the first adhesive surface (113a) through a plurality of nozzles (141) of the application member (140) (S220). After that, a positive electrode (111) may be adhered to the first adhesive surface (113a) (S230). Here, the positive electrodes (111) are stacked on the left side of the table (120) as illustrated in FIG. 1, and may be sequentially transferred from the positive electrode (111) located at the top through a separate transfer device (not illustrated).

[0069] After the positive electrode (111) is adhered to the first adhesive surface (113a), a pair of rollers (130) may move to the left so that the separator (113) may be bent to form a second adhesive surface (113b) (S240). Then, an adhesive (150) may be applied in a dot array form to the second adhesive surface (113b) through a plurality of nozzles (141) of the application member (140) (S250). Thereafter, a negative electrode (112) may be adhered to the second adhesive surface (113b) (S260). Here, the negative electrodes (112) are stacked on the right side of the table (120) as illustrated in FIG. 1, and may be sequentially transferred from the negative electrode (112) located at the top through a separate transfer device (not illustrated).

[0070] And, a method for manufacturing a secondary battery according to one embodiment of the present invention can manufacture an electrode assembly (110) in which a positive electrode (111) and a negative electrode (112) are alternately laminated on a separator (113) by repeating the above-described process.

[0071] In addition, the above-described process is only one embodiment of the present invention and is not limited thereto. That is, the positive electrode (111) may be laminated on the right side of the table (120), and the negative electrode (112) may be laminated on the left side of the table (120). In addition, the negative electrode (112) may be adhered to the first adhesive surface (113a), and the positive electrode (111) may be adhered to the second adhesive surface (113b). In addition, the positions of a pair of rollers (130) may be fixed, and the table (120) may reciprocate in the left-right direction (x-axis direction) so that the separator (113) may be bent in a zigzag shape.

[0072] Additionally, referring to FIG. 8 as another embodiment of the secondary battery manufacturing method of the present invention, a separator (113) is placed on a table (120) (S310), and the separator (113) is bent in a zigzag shape through a pair of rollers (130) so that a plurality of adhesive surfaces (113a, 113b) are formed on the separator (113), and then an adhesive (150) is applied to the adhesive surfaces (113a, 113b) formed on the separator (113) through a pair of application members (140) (S330), and the electrodes (111, 112) can be adhered to the adhesive surfaces (113a, 113b) on which the adhesive (150) is applied (S340). And, by applying pressure from the top to the bottom of the electrode assembly (110) in which electrodes (111, 112) and separators (113) are alternately stacked (S350) and injecting an electrolyte between the electrodes (111, 112) and the separator (113) (S360), an electrode assembly (110) in which a plurality of electrodes (111, 112) are alternately stacked on the separator (113) can be manufactured.

[0073] In summary, the secondary battery manufacturing device and manufacturing method according to the present invention can manufacture an electrode assembly in which positive and negative electrodes are alternately bonded to a separator and laminated during the secondary battery manufacturing process. Furthermore, in the structure of an electrode assembly in which multiple electrodes are laminated, the adhesive applied to the separator can enhance the adhesive strength between the separator and the electrodes, thereby improving the quality of the secondary battery.

[0074] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. In a secondary battery manufacturing device for manufacturing an electrode assembly in which electrodes and separators are alternately laminated, A table on which the above separator is placed; A pair of rollers positioned on the upper portion of the table and bending the separator in a zigzag shape so that a plurality of adhesive surfaces are formed on the separator; and A pair of application members positioned on both left and right sides of the pair of rollers and applying adhesive to the adhesive surface formed on the separator, The above electrode assembly, A secondary battery manufacturing device characterized in that the electrode is bonded to the bonding surface to which the adhesive is applied.

2. In paragraph 1, The above pair of application members are, A secondary battery manufacturing device characterized by including a plurality of nozzles that apply the adhesive in a dot array form to the bonding surface.

3. In paragraph 1, The above electrodes are, Containing a positive electrode and a negative electrode, The above plurality of adhesive surfaces are, A secondary battery manufacturing device characterized by including a first adhesive surface to which the positive electrode is adhered and a second adhesive surface to which the negative electrode is adhered.

4. In paragraph 3, The above separator is, The positive electrode is bonded to the first adhesive surface, and one side is bent to cover the positive electrode, A secondary battery manufacturing device characterized in that the negative electrode is bonded to the second adhesive surface and the other side is bent to cover the negative electrode.

5. In paragraph 1, The above adhesive, A secondary battery manufacturing device characterized in that the adhesive is applied in an amount of 0.01 g / m² or more and 13 g / m² or less to the above-mentioned adhesive surface.

6. In paragraph 5, The above electrode assembly, Containing an electrolyte injected between the electrode and the separator, The adhesive applied above is, A secondary battery manufacturing device characterized in that the capacity of the injected electrolyte is 0.03 wt% or more and 0.37 wt% or less.

7. In paragraph 1, The above adhesive, Contains a pressure sensitive adhesive (PSA), The above pressure-sensitive adhesive is, A secondary battery manufacturing device characterized by including an acrylic or olefin series material.

8. In paragraph 1, A secondary battery manufacturing device characterized in that the table or the pair of rollers moves reciprocally in the left-right direction.

9. In paragraph 1, The above separator is, A secondary battery manufacturing device characterized by including a ceramic coated separator (CCS) coated with ceramic on the surface.

10. In a secondary battery manufacturing method for manufacturing an electrode assembly in which electrodes and separators are alternately laminated, A step in which the above separator is placed on a table; A step of bending the separator in a zigzag shape so that a plurality of adhesive surfaces are formed on the separator through a pair of rollers located on the upper part of the table; A step of applying an adhesive to the adhesive surface formed on the separator through a pair of application members positioned on both left and right sides of the pair of rollers; and A method for manufacturing a secondary battery, comprising a step of bonding the electrode to the bonding surface to which the adhesive is applied.

11. In paragraph 10, The step of applying adhesive to the adhesive surface formed on the above separator is as follows: A method for manufacturing a secondary battery, characterized in that the adhesive is applied to the bonding surface in an amount of 0.01 g / m² or more and 13 g / m² or less.

12. In paragraph 11, Further comprising a step of injecting an electrolyte between the electrode and the separator, The adhesive applied above is, A method for manufacturing a secondary battery, characterized in that the amount of the injected electrolyte is 0.03 wt% or more and 0.37 wt% or less.

13. In paragraph 10, Further comprising a step of pressing from the upper part of the electrode assembly toward the lower part, The above adhesive, Contains a pressure sensitive adhesive (PSA), The above pressure-sensitive adhesive is, A method for manufacturing a secondary battery, characterized in that it includes an acrylic or olefin series material.

14. In paragraph 10, The step of applying adhesive to the adhesive surface formed on the above separator is as follows: A secondary battery manufacturing method characterized in that the adhesive is applied to the bonding surface in the form of a dot array through a plurality of nozzles included in the pair of application members.

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