Manufacturing method of stacked battery

Abstract

To provide a manufacturing method for a lamination type battery in which the decrease in yield can be suppressed.SOLUTION: A manufacturing method for a lamination type battery in this disclosure includes the steps of: preparing a jig-equipped electrode body lamination sheet including an electrode body lamination sheet including a unit electrode body sheet in which a positive electrode sheet, an insulating sheet, and a negative electrode sheet are stacked in this order along a first direction, and at least one jig holding a partial region of both surfaces of the electrode body lamination sheet in the first direction; and cutting the electrode body lamination sheet included in the jig-equipped electrode body lamination sheet that moves relative to a rotary blade along a second direction which is orthogonal to the first direction, and exposed from the jig, by cutting with the rotary blade. The jig includes a pair of jig plates, a plurality of fastening tools, and at least one pressing tool. The pressing tool is attached to at least one of the pair of jig plates and presses at least a central region of the region in the second direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for manufacturing a stacked battery. [Background technology]

[0002] In recent years, there has been an increasing demand for high-output stacked batteries as large-scale energy sources for electric vehicles, etc. A stacked battery includes at least one unit electrode assembly in which a positive electrode, a negative electrode, and an electrolyte layer that electrically insulates the positive electrode and the negative electrode are stacked.

[0003] Patent Document 1 discloses a method for producing a laminated battery, which discloses cutting an electrode laminate sheet in which a positive electrode, an electrolyte, and a negative electrode are laminated and integrated into a desired size. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-231796 Summary of the Invention [Problem to be solved by the invention]

[0005] A rotary blade may be used as a cutting method for the electrode laminate sheet. When cutting the electrode laminate sheet using a rotary blade, a jig-attached electrode laminate sheet is generally used to prevent the electrode laminate sheet from being displaced.

[0006] An example of a method for cutting an electrode assembly laminate sheet using a rotary blade is shown in Fig. 6. In Fig. 6, reference numeral 931 denotes the rotation axis of the rotary blade 930. Reference numeral D930 denotes the rotation direction of the rotary blade 930. Reference numeral D900 denotes the movement direction of the jig-attached electrode assembly laminate sheet 900 that moves relative to the rotary blade 930.

[0007] The jig-attached electrode assembly laminate sheet 900 includes an electrode assembly laminate sheet 910 and a jig 920 that fixes the electrode assembly laminate sheet 910. A portion of the electrode assembly laminate sheet 910 is exposed from the jig 920. The jig 920 has a pair of jig plates 921, 922 and a plurality of bolts 923. The plurality of bolts 923 are disposed at both ends of the pair of jig plates 921, 922 in the feed direction D900 to fasten the pair of jig plates 921, 922 together.

[0008] In the jig-attached electrode assembly laminate sheet 900, a gap R900 may be formed between the electrode assembly laminate sheet 910 and the jig plate 921 at the center of the jig-attached electrode assembly laminate sheet 900 in the feed direction D900. In particular, the longer the length of the electrode assembly laminate sheet 910 in the feed direction D900, the more likely the gap R900 is to be formed. When the gap R900 is formed, the electrode assembly laminate sheet 910 may vibrate relative to the jig plates 921 and 922 while the electrode assembly laminate sheet 910 exposed from the jig 920 is cut by the rotary blade 930. This may cause defects on the cut surface of the electrode assembly laminate sheet 910. The defects include the occurrence of powders that constitute the layers (e.g., positive electrodes, etc.) that constitute the electrode assembly laminate sheet 910 (hereinafter also referred to as "constituent layers") and the occurrence of burrs on the constituent layers. "Burrs in the constituent layers" refers to portions of the constituent layers that are not cut by the rotary blade 930 and protrude from the cut surface of the electrode body laminate sheet 910. If a defect occurs on the cut surface of the electrode body laminate sheet 910, a short circuit may occur between the constituent layers of the electrode body laminate sheet 910. Therefore, an electrode body laminate sheet 910 with a defect on the cut surface is treated as a defective product. As a result, there is a risk of a decrease in yield when using conventional methods for cutting electrode body laminate sheets.

[0009] The present disclosure has been made in consideration of the above circumstances. An object of one embodiment of the present disclosure is to provide a method for manufacturing a stacked battery that can suppress a decrease in yield. [Means for solving the problem]

[0010] Means for solving the above problems include the following embodiments. <1> A manufacturing method for a stacked battery according to a first aspect of the present disclosure includes preparing a jig-attached electrode assembly laminate sheet including at least one unit electrode assembly sheet formed by stacking a positive electrode sheet, an insulating sheet, and a negative electrode sheet in this order along a first direction, and at least one jig that clamps a partial area of ​​both surfaces of the electrode assembly laminate sheet in the first direction; and cutting and cutting, with the rotary blade, the electrode assembly laminate sheet that is included in the jig-attached electrode assembly laminate sheet that moves relative to a rotary blade along a second direction perpendicular to the first direction and that is exposed from the jig, wherein the jig has a pair of jig plates covering the partial areas of both surfaces, a plurality of fasteners that are arranged at both ends of the pair of jig plates in the second direction and fasten the pair of jig plates together, and at least one pressing tool that is attached to at least one of the pair of jig plates and presses at least a central area of ​​the area in the second direction.

[0011] The term "laminated battery" refers to a battery including an electrode assembly formed by laminating a sheet-shaped positive electrode, a sheet-shaped negative electrode, and a sheet-shaped insulating layer that electrically insulates the positive electrode and the negative electrode. The positive electrode sheet, insulating sheet, and negative electrode sheet included in the electrode assembly laminate sheet are cut to a desired size and function as a positive electrode, an insulating layer, and a negative electrode, respectively. The term "insulating sheet" refers to a sheet that combines ion transportability that transports desired ions and electronic insulation (i.e., electrical insulation) that makes it difficult to transport ions other than the desired ions. The term "rotary blade" refers to a rotating circular saw or circular blade.

[0012] In the first embodiment, the jig has a pressing tool that presses the central region of the electrode assembly laminate sheet in the second direction. Therefore, even if the area of ​​the electrode assembly laminate sheet is relatively large (for example, even if the length of the electrode assembly laminate sheet in the second direction is long), a gap is unlikely to be formed between the jig plate and the electrode assembly laminate sheet in the central portion in the second direction of the jig-attached electrode assembly laminate sheet. This makes it difficult for the electrode assembly laminate sheet to vibrate relative to the jig plate while the electrode assembly laminate sheet is being cut with the rotary blade. As a result, defects are unlikely to occur on the cut surface of the electrode assembly laminate sheet. In other words, the occurrence of defective products is suppressed. Therefore, the manufacturing method of the stacked battery of the first embodiment can suppress a decrease in yield.

[0013] <2> In a second aspect of the present disclosure, there is provided a method for producing a stacked battery, the jig further comprising the steps of: <1> 2. A method for producing the laminated battery according to claim 1 .

[0014] In the second aspect, in the jig-attached electrode laminate sheet, a plate is interposed between the electrode laminate sheet and the pressing tool, so that the electrode laminate sheet is more likely to receive the pressure from the pressing tool on its surface. This makes it more difficult for a gap to form between the jig plate and the electrode laminate sheet. As a result, the manufacturing method of the stacked battery of the second aspect can further suppress a decrease in yield.

[0015] <3> In the method for producing a stacked battery according to a third aspect of the present disclosure, the pressing tool is a set screw or a ball plunger. <1> or <2> 2. A method for producing the laminated battery according to claim 1 .

[0016] In the third aspect, in the jig-attached electrode laminate sheet, the pressing force of the pressing tool on the electrode laminate sheet is easily adjusted. This makes it more difficult for a gap to be formed between the jig plate and the electrode laminate sheet. As a result, the manufacturing method of the stacked battery of the third aspect can further suppress a decrease in yield.

[0017] <4> In a fourth aspect of the present disclosure, there is provided a method for manufacturing a stacked battery, the jig having a plurality of the pressing tools, each of the pressing tools being attached along the second direction. <1> ~ <3> The present invention relates to a method for producing the laminated battery described in any one of the above.

[0018] In the fourth aspect, the number of portions of the electrode assembly laminate sheet pressed by the pressing tool in the second direction is increased compared to when the number of pressing tools is one. This makes it more difficult for gaps to form between the jig plate and the electrode assembly laminate sheet. As a result, the manufacturing method of the stacked battery in the fourth aspect can further suppress a decrease in yield.

[0019] <5> In a fifth aspect of the present disclosure, there is provided a method for producing a stacked battery, the jig-attached electrode assembly laminate sheet includes a pair of the jigs, and the pair of jigs are arranged to sandwich a portion of the electrode assembly laminate sheet to be cut in a third direction perpendicular to each of the first direction and the second direction. <1> ~ <4> The present invention relates to a method for producing the laminated battery described in any one of the above.

[0020] In the fifth aspect, the electrode assembly laminate sheet is more easily fixed than when the electrode assembly laminate sheet is not fixed by a pair of jigs. This makes it more difficult for the electrode assembly laminate sheet to vibrate relative to the jigs while the electrode assembly laminate sheet is being cut by the rotary blade. In addition, the electrode assembly laminate sheet is more easily cut at a predetermined position. As a result, the manufacturing method of the stacked battery of the fifth aspect can further suppress a decrease in yield. Effect of the Invention

[0021] According to the present disclosure, a method for manufacturing a stacked battery capable of suppressing a decrease in yield is provided. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a diagram for explaining a method for cutting an electrode laminate sheet according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a top view of a jig-attached electrode assembly laminate sheet according to an embodiment of the present disclosure. [Diagram 3] FIG. 3 is a cross-sectional view of an electrode assembly laminate sheet in an embodiment of the present disclosure. [Figure 4] FIG. 4 is a top view of a jig in accordance with an embodiment of the present disclosure. [Diagram 5] FIG. 5 is a front view of a cut surface of an electrode laminate sheet of an embodiment. [Figure 6] FIG. 6 is a diagram for explaining a conventional method for cutting an electrode laminate sheet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] In the present disclosure, a numerical range indicated using "~" means a range including the numerical values ​​before and after "~" as the minimum and maximum values, respectively. In the present disclosure, a combination of two or more preferred embodiments is a more preferred embodiment.

[0024] Hereinafter, an embodiment of a manufacturing method for a stacked battery according to the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and description thereof will not be repeated.

[0025] (1) Manufacturing method of stacked battery The manufacturing method of the stacked battery according to the embodiment includes preparing a jig-attached electrode assembly laminate sheet 1 (hereinafter also referred to as a "preparation step") and cutting an electrode assembly laminate sheet 10 included in the jig-attached electrode assembly laminate sheet 1 (hereinafter also referred to as a "cutting step"). The preparation step and the cutting step are carried out in this order. As a result, an electrode assembly laminate sheet 10 of a desired size is obtained. The electrode assembly laminate sheet 10 is a rectangular parallelepiped object.

[0026] In the embodiment, one side of the longitudinal direction of the main surface of the electrode body laminate sheet 10 is defined as the X-axis positive direction (hereinafter also referred to as the "right side"), and the opposite side is defined as the X-axis negative direction (hereinafter also referred to as the "left side"). One side of the lateral direction of the main surface of the electrode body laminate sheet 10 is defined as the Y-axis positive direction (hereinafter also referred to as the "front side"), and the opposite side is defined as the Y-axis negative direction (hereinafter also referred to as the "rear side"). One side of the thickness direction of the electrode body laminate sheet 10 is defined as the Z-axis positive direction (hereinafter also referred to as the "upper side"), and the opposite side is defined as the Z-axis negative direction (hereinafter also referred to as the "lower side"). The X-axis, Y-axis, and Z-axis are mutually orthogonal. The Z-axis direction is an example of a first direction. The X-axis direction is an example of a second direction. The Y-axis direction is an example of a third direction. Note that these directions do not limit the directions of the electrode body laminate sheet 10 of the present disclosure when used.

[0027] (1.1) Preparation process In the preparation step, a jig-fitted electrode laminate sheet 1 is prepared.

[0028] (1.1.1) Electrode laminate sheet with jig As shown in Figs. 1 and 2, the jig-attached electrode laminate sheet 1 includes one electrode laminate sheet 10, a first jig 20A, and a second jig 20B (see Fig. 2). As shown in Fig. 2, the first jig 20A holds a partial region R20A (see Fig. 2) of both surfaces in the front-rear direction (Y-axis direction) of the electrode laminate sheet 10. The second jig 20B holds a partial region R20B (see Fig. 2) of both surfaces in the front-rear direction (Y-axis direction) of the electrode laminate sheet 10. The first jig 20A and the second jig 20B are arranged to sandwich the portion (cutting line CC) (see Fig. 2) of the electrode laminate sheet 10 to be cut in the front-rear direction (Y-axis direction). The jig-attached electrode laminate sheet 1 may be prepared by attaching the first jig 20A and the second jig 20B to the electrode laminate sheet 10 by a known method.

[0029] (1.1.1.1) Electrode laminate sheet As shown in Fig. 3, the electrode assembly laminate sheet 10 is formed by stacking a plurality of unit electrode sheets 11 in the vertical direction (Z-axis direction). The unit electrode sheet 11 is formed by stacking a positive electrode sheet 12, a solid electrolyte sheet 13 which is an example of an insulating sheet, a negative electrode sheet 14, the solid electrolyte sheet 13, and the positive electrode sheet 12 in this order in the vertical direction (Z-axis direction). The electrode assembly laminate sheet 10 may be prepared by any known method. The electrode assembly laminate sheet 10 is a so-called sheet for solid-state batteries.

[0030] The positive electrode sheet 12 has a positive electrode current collector 121 and a positive electrode mixture layer 122 laminated on one main surface of the positive electrode current collector 121. The material of the positive electrode current collector 121 is, for example, aluminum, copper, stainless steel, nickel, iron, titanium, or carbon. Each of the positive electrode current collectors 121 is, for example, in the form of a foil or a mesh. The positive electrode mixture layer 122 is made of a positive electrode active material (for example, LiCoO 2 , LiMn 2 O 4 , or LiFePO 4 ). Positive electrode mixture layer 122 may further contain a solid electrolyte (e.g., a sulfide solid electrolyte, an oxide solid electrolyte, or a halogenated solid electrolyte), a conductive material (e.g., acetylene black, metal particles, a conductive polymer, or the like), and a binder (e.g., styrene butadiene rubber or polyvinylidene fluoride) as necessary.

[0031] The solid electrolyte sheet 13 contains a solid electrolyte (e.g., a sulfide solid electrolyte, an oxide solid electrolyte, or a halogenated solid electrolyte) and may further contain a binder (e.g., styrene butadiene rubber or polyvinylidene fluoride) as necessary. The composition of the sulfide solid electrolyte is, for example, xLi 2 S·(100-x)P 2 S 5 (70≦x≦80), yLiI・zLiBr・(100-yz)(xLi 2 S (1-x)P 2 S 5) (0.7≦x≦0.8, 0≦y≦30, 0≦z≦30). Examples of oxide solid electrolytes include garnet-type solid electrolytes, perovskite-type solid electrolytes, Nasicon-type solid electrolytes, Li-PO-based solid electrolytes, and Li-BO-based solid electrolytes. Examples of halogenated solid electrolytes include Li 6-3z Z z X 6 (X is at least one of Cl and Br, and z is 0 <z<2である)である。

[0032] The negative electrode sheet 14 has a negative electrode current collector 141 and a negative electrode mixture layer 142 laminated on both main surfaces of the negative electrode current collector 141. The material of the negative electrode current collector 141 is, for example, aluminum, copper, stainless steel, nickel, iron, titanium, or carbon. The shape of the negative electrode current collector 141 is, for example, a foil shape or a mesh shape. The negative electrode mixture layer 142 contains a negative electrode active material (for example, metallic lithium, graphite, lithium titanate, or simple Si). The negative electrode mixture layer 142 may further contain a solid electrolyte (for example, a sulfide solid electrolyte, an oxide solid electrolyte, or a halogenated solid electrolyte), a conductive material (for example, acetylene black, metal particles, or a conductive polymer, etc.), and a binder (for example, styrene butadiene rubber or polyvinylidene fluoride) as necessary.

[0033] (1.1.1.2) First jig The first jig 20A has a pair of jig plates 21A and 22, a plurality of fasteners 23, a plurality of pressing tools 24, and a plate 25, as shown in FIG.

[0034] Each of the pair of jig plates 21A, 22 is a flat plate. As shown in Fig. 4, the jig plate 21A has a plurality of fastening through holes H1 and a plurality of pressing through holes H2. The plurality of fastening through holes H1 are formed at both ends of the jig plate 21A in the left-right direction (X-axis direction). The plurality of pressing through holes H2 are formed at equal intervals along the left-right direction (X-axis direction) in a rear side (Y-axis negative direction) part of the jig plate 21A. The material of the pair of jig plates 21A, 22 may be metal.

[0035] The fasteners 23 are attached to the fastening through holes H1 of the jig plate 21A to fasten the pair of jig plates 21A, 22. The fasteners 23 are, for example, screws. The fasteners 23 may be made of any material as long as it is made of metal.

[0036] The pressing tools 24 press the region R20A of the electrode laminate sheet 10. The pressing tools 24 are attached to the pressing through holes H2 of the jig plate 21A. More specifically, the pressing tools 24 are arranged at equal intervals along the left-right direction (X-axis direction) in the rear side (Y-axis negative direction) of the jig plate 21A. The length L (see FIG. 1) of the pressing tools 24 decreases from the center to both ends of the jig plate 21A in the left-right direction (X-axis direction). The length L indicates the length of the part of the pressing tool 24 exposed from the surface S21 on the lower side (Z-axis negative direction) of the jig plate 21A in the up-down direction (Z-axis direction). The length L is appropriately selected according to the left-right direction (X-axis direction) length of the electrode laminate sheet 10, the number of pressing tools 24, and the like. The pressing tool 24 is a set screw or a ball plunger. The material of the pressing tool 24 may be metal.

[0037] The plate 25 is disposed between the electrode body laminate sheet 10 and the pressing tool 24. The plate 25 covers the entire surface of the electrode body laminate sheet 10 that faces the jig plate 21A. The material of the plate 25 may be metal or resin.

[0038] (1.1.1.3) Second jig The second jig 20B has a pair of jig plates 21B and 22, and a plurality of fasteners 23. The jig plate 21B is similar to the jig plate 21A except that the jig plate 21B does not have a plurality of pressing through holes H2 formed therein.

[0039] (1.2) Cutting process In the cutting process, as shown in Fig. 1 and Fig. 2, the electrode assembly laminate sheet 10 included in the jig-attached electrode assembly laminate sheet 1 and exposed from the pair of jigs 20A, 20B is cut by cutting with a rotary blade 30. At this time, the jig-attached electrode assembly laminate sheet 1 moves relative to the rotary blade 30 along a feed direction D1. The feed direction D1 is the same as the rightward direction (positive direction of the X-axis). In Fig. 1, reference numeral 31 denotes the rotation axis of the rotary blade 30, and reference numeral D2 denotes the rotation direction of the rotary blade 30.

[0040] In the cutting process, the electrode body laminate sheet 10 may be cut by moving the rotary blade 30 relative to the electrode body laminate sheet 1 with the jig whose position is fixed, or the electrode body laminate sheet 10 may be cut by moving the electrode body laminate sheet 1 with the jig relative to the rotary blade 30 whose position is fixed.

[0041] The size of the rotary blade 30, the number of blades of the rotary blade 30, the rotation speed of the rotary blade 30, and the moving speed of the jig-attached electrode laminate sheet 1 relative to the rotary blade 30, etc. are appropriately selected depending on the size of the electrode laminate sheet 10, etc.

[0042] (1.3) Other manufacturing processes The method for manufacturing a stacked battery according to the embodiment may include other manufacturing steps of a solid-state battery in addition to the preparation step and the cutting step. The other manufacturing steps of a solid-state battery may be any known method.

[0043] (1.4) Working Example A jig-attached electrode laminate sheet 1 shown in Fig. 1 and Fig. 2 was prepared by a known method. Next, the electrode laminate sheet 10 included in the jig-attached electrode laminate sheet 1 and exposed from the pair of jigs 20A, 20B was cut by cutting with a rotary blade 30 along the up-down direction (Z-axis direction). At this time, the moving speed of the jig-attached electrode laminate sheet 1 relative to the rotary blade 30 was 5 mm / sec. The rotary blade 30 had 48 blades. The rotation speed of the rotary blade 30 was 300 rpm.

[0044] FIG. 5 shows a front view of a cut surface of the electrode body laminate sheet 10 cut by the rotary blade 30. As shown in FIG. 5, no defects (e.g., the occurrence of powder falling off of the constituent layers, the occurrence of burrs in the constituent layers, etc.) were observed in the cut surface of the electrode body laminate sheet 10 in each of the constituent layers constituting the electrode body laminate sheet 10. In other words, the obtained electrode body laminate sheet 10 was not treated as a defective product. This shows that the manufacturing method of the laminated battery of the embodiment can suppress a decrease in yield.

[0045] (1.5) Effects 1 to 5, the method for manufacturing a stacked battery according to the embodiment includes a preparing step and a cutting step. The jig 20A has a pair of jig plates 21A, 22, a plurality of fasteners 23, and a plurality of pressing tools 24. The pressing tools 24 press the central region of the electrode body laminate sheet 10 in the left-right direction (X-axis direction). As a result, even if the area of ​​the electrode body laminate sheet 10 is relatively large (for example, even if the length of the electrode body laminate sheet in the left-right direction (X-axis direction) is long), a gap is unlikely to be formed between the jig plates 21A, 22 and the electrode body laminate sheet 10 at the center in the left-right direction (X-axis direction) of the jig-attached electrode body laminate sheet 1. As a result, while the electrode body laminate sheet 10 is being cut by the rotary blade 30, the electrode body laminate sheet 10 is unlikely to vibrate relative to the jig plates 21A, 22. As a result, defects are unlikely to occur on the cut surfaces of the electrode body laminate sheet 10. In other words, the occurrence of defective products is suppressed. Therefore, the manufacturing method of the stacked battery according to the embodiment can suppress a decrease in yield.

[0046] As described with reference to FIGS. 1 to 5, in the method for manufacturing a stacked battery according to this embodiment, the jig 20A has a plate 25. As shown in FIG. In the jig-attached electrode assembly laminate sheet 1, the plate 25 is interposed between the electrode assembly laminate sheet 10 and the pressing tool 24, so that the electrode assembly laminate sheet 10 can easily receive the pressing force from the pressing tool 24 on its surface. This makes it more difficult for gaps to form between the jig plates 21A, 22 and the electrode assembly laminate sheet 10. As a result, the manufacturing method of the stacked battery of the embodiment can further suppress a decrease in yield.

[0047] As described with reference to FIGS. 1 to 5, in the method for manufacturing a stacked battery according to the embodiment, the pressing tool 24 is a set screw or a ball plunger. In the jig-attached electrode body laminate sheet 1, the pressing force of the pressing tool 24 on the electrode body laminate sheet 10 is easily adjusted. This makes it more difficult for gaps to form between the jig plates 21A, 22 and the electrode body laminate sheet 10. As a result, the manufacturing method of the stacked battery of the embodiment can further suppress a decrease in yield.

[0048] 1 to 5, in the method for manufacturing a stacked battery according to the embodiment, the jig 20A has a plurality of pressing tools 24. Each of the plurality of pressing tools 24 is attached along the left-right direction (X-axis direction). This increases the number of portions of the electrode body laminate sheet 10 pressed by the pressing tool 24 in the left-right direction (X-axis direction) compared to when there is only one pressing tool 24. This makes it more difficult for gaps to form between the pair of jig plates 21A, 22 and the electrode body laminate sheet 10. As a result, the manufacturing method for a stacked battery according to the embodiment can further suppress a decrease in yield.

[0049] 1 to 5, in the manufacturing method of a stacked battery according to the embodiment, the jig-attached electrode body laminate sheet 1 includes a pair of jigs 20A, 20B. The pair of jigs 20A, 20B are arranged in the front-rear direction (Y-axis direction) so as to sandwich the portion of the electrode body laminate sheet 10 to be cut (i.e., the CC cutting line). This makes it easier for the electrode body laminate sheet 10 to be fixed than when the electrode body laminate sheet 10 is not fixed by the pair of jigs 20A, 20B. Therefore, while the electrode body laminate sheet 10 is being cut by the rotary blade 30, the electrode body laminate sheet 10 is less likely to vibrate relative to the jigs 20A, 20B. In addition, the electrode body laminate sheet 10 is more likely to be cut at a predetermined position. As a result, the manufacturing method of the stacked battery of the embodiment can further suppress a decrease in yield.

[0050] (2) Variations In the method for manufacturing a stacked battery according to the embodiment, the jig 20A has the plate 25, but the plate 25 does not have to be included. In the manufacturing method of the stacked battery according to the embodiment, the pressing tool 24 is a set screw or a ball plunger, but may be any known part capable of pressing the electrode body stack sheet. In the manufacturing method of the stacked battery according to the embodiment, the jig 20A has a plurality of pressing tools 24, but may have one pressing tool 24. Furthermore, the plurality of pressing tools 24 are arranged at a rear side (negative Y-axis direction) of the jig plate 21A, but may be arranged at a central portion of the jig plate 21A in the front-rear direction (Y-axis direction), or may be arranged at a front side (positive Y-axis direction) of the jig plate 21A. The plurality of pressing tools 24 are arranged at equal intervals along the left-right direction (X-axis direction), but may not be arranged at equal intervals along the left-right direction (X-axis direction). In the manufacturing method of the stacked battery according to the embodiment, the jig-attached electrode laminate sheet 1 includes the second jig 20B, but it does not necessarily have to include the second jig 20B. In the manufacturing method of the laminated battery according to the embodiment, the electrode laminate sheet 10 is a sheet for a solid battery, but may be a sheet for a non-aqueous electrolyte battery using a non-aqueous electrolyte. In the manufacturing method of the stacked battery according to the embodiment, the stacked battery is a lithium ion secondary battery, but it may be a metal ion secondary battery (for example, a sodium ion secondary battery, a magnesium ion secondary battery, etc.). [Explanation of symbols]

[0051] 1: electrode body laminated sheet with jig, 10: electrode body laminated sheet, 11: unit electrode sheet, 12: positive electrode sheet, 13: solid electrolyte sheet, 14: negative electrode sheet, 20A, 20B: jig, 21A, 21B, 22: jig plate, 23: fastener, 24: pressing tool, 25: plate, 30: rotary blade, 31: rotary blade rotation axis

Claims

1. preparing an electrode assembly laminate sheet with a jig, the electrode assembly laminate sheet including at least one unit electrode sheet formed by laminating a positive electrode sheet, an insulating sheet, and a negative electrode sheet in this order along a first direction, and at least one jig for holding partial areas of both surfaces of the electrode assembly laminate sheet in the first direction; cutting, with the rotary blade, a portion of the electrode assembly laminate sheet that is included in the jig-attached electrode assembly laminate sheet that moves relative to the rotary blade along a second direction perpendicular to the first direction and that is exposed from the jig; Including, The jig is A pair of jig plates covering partial areas of both surfaces; a plurality of fasteners that are arranged at both ends of the pair of jig plates in the second direction and fasten the pair of jig plates together; At least one pressing tool attached to at least one of the pair of jig plates and pressing at least a central region of the region in the second direction; The method for producing a laminated battery comprising the steps of:

2. The method for manufacturing a stacked battery according to claim 1 , wherein the jig further comprises at least one plate disposed between the electrode assembly stack sheet and the pressing tool.

3. 3. The method for manufacturing a stacked battery according to claim 1, wherein the pressing tool is a set screw or a ball plunger.

4. The jig has a plurality of the pressing tools, The method for manufacturing a stacked battery according to claim 1 or 2, wherein each of the plurality of pressing tools is attached along the second direction.

5. The jig-attached electrode laminate sheet includes a pair of the jigs, 3. The method for manufacturing a stacked battery according to claim 1, wherein the pair of jigs are arranged to sandwich a portion of the electrode assembly laminate sheet to be cut in a third direction perpendicular to each of the first direction and the second direction.

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