JP2020102411A - Manufacturing device for power storage module, and manufacturing method therefor - Google Patents

Abstract

To provide a manufacturing device for a power storage module capable of monitoring a pressure of a resin material when forming a secondary seal including multiple resin parts by means of injection molding, and a manufacturing method therefor.SOLUTION: A manufacturing device 100 is provided for a power storage module 4 comprising an electrode laminate 11 and a seal member 12. The seal member 12 includes a primary seal 21 and a secondary seal 22. The secondary seal 22 includes a first resin part 23 and a second resin part 24. The manufacturing device 100 comprises: a mold M; a first jig 40 having a shape corresponding to a shape of the first resin part 23 and provided freely attachable to and detachable from the mold M; a second jig 50 having a shape corresponding to a shape of the second resin part 24 and provided freely attachable to and detachable from the mold M; a first sensor P1 provided in the mold M and detecting a pressure of a first resin material; and a second sensor P2 provided in the second jig 50 and detecting a pressure of a second resin material.SELECTED DRAWING: Figure 14

Description

One aspect of the present invention relates to a manufacturing apparatus and a manufacturing method of a power storage module.

As a conventional power storage module, there is known a bipolar battery including a bipolar electrode in which a positive electrode is formed on one surface of an electrode plate and a negative electrode is formed on the other surface (see Patent Document 1). The bipolar battery includes a laminated body formed by laminating a plurality of bipolar electrodes via a separator. A sealing body that seals between the bipolar electrodes adjacent to each other in the stacking direction is provided on the side surface of the stacked body, and the electrolytic solution is contained in the internal space formed between the bipolar electrodes.

JP, 2011-204386, A

The seal member may include a frame-shaped primary seal provided on the peripheral portion of the bipolar electrode and a cylindrical secondary seal provided around the stacked primary seals. The secondary seal is formed by injection molding. Therefore, if the thickness of the secondary seal becomes large, the resin material may shrink when the resin material melted during injection molding is solidified, and voids may occur inside the secondary seal. Therefore, it is conceivable that the secondary seal includes the first resin portion and the second resin portion, and the thickness of each resin portion is smaller than the thickness of the entire secondary seal. Even in such a configuration, it is necessary to monitor the pressure of the resin material in order to improve the quality of the secondary seal.

Therefore, one aspect of the present invention is to provide a manufacturing apparatus and a manufacturing method of an electricity storage module capable of monitoring the pressure of a resin material when a secondary seal having a plurality of resin portions is formed by injection molding. To aim.

An electricity storage module manufacturing apparatus according to an aspect of the present invention is an electricity storage module that includes an electrode stack including a plurality of electrodes stacked in a first direction, and a sealing member that surrounds the electrode stack when viewed from the first direction. In the manufacturing apparatus, the plurality of electrodes include a bipolar electrode, each of the plurality of electrodes includes an electrode plate, and the seal member includes a primary seal provided on a peripheral portion of the electrode plate and a first seal when viewed from a first direction. And a secondary seal surrounding the primary seal, wherein the secondary seal has a first resin portion provided on a side surface extending in the first direction of the primary seal and a second resin extending in the first direction of the first resin portion. And a second resin portion provided on a side surface of the mold, the manufacturing apparatus having a mold for forming a secondary seal by injection molding, and a shape corresponding to the shape of the first resin portion, and the mold. A first jig that is detachably attached to the mold, and a second jig that has a shape corresponding to the shape of the second resin portion and that is detachably attached to the mold; A first sensor for detecting the pressure of the first resin material forming the first resin portion, and a second sensor provided on the second jig for detecting the pressure of the second resin material forming the second resin portion, Equipped with.

This power storage module manufacturing apparatus includes a first sensor provided on an injection molding die and a second sensor provided on a second jig. Thereby, the pressure of the first resin material forming the first resin portion and the pressure of the second resin material forming the second resin portion can be detected. Therefore, these pressures can be monitored.

The primary seal is provided with a first communication hole that communicates with the internal space provided between the adjacent electrodes, and the first jig is arranged in the first communication hole and communicates with the first communication hole. You may have a 1st nest which forms a 2 communicating hole in a 1st resin part. In this case, since the first jig has the first insert, the flow of the first resin material is complicated, and the quality of the first resin portion is likely to deteriorate. Even in such a case, since the pressure of the first resin material can be monitored, it is possible to suppress the deterioration of the quality of the first resin portion.

The second jig may have a second insert which is disposed in the second communication hole and forms a third communication hole, which is in communication with the second communication hole, in the second resin portion. In this case, since the second jig has the second insert, the flow of the second resin material is complicated, and the quality of the second resin portion is likely to deteriorate. Even in such a case, since the pressure of the second resin material can be monitored, it is possible to suppress the deterioration of the quality of the second resin portion.

The second jig includes a first jig portion that does not have a nest, and a second jig portion that has a second nest, and the second sensor is provided in the second jig portion. May be. In this case, since the second sensor is provided in the second jig portion that complicates the flow of the second resin material, it is possible to reliably suppress the deterioration of the quality of the second resin portion.

The mold has a plurality of gates into which the second resin material is injected, and the second sensor is provided at a position where the distances from the adjacent gates are equal to each other when viewed from the second direction intersecting the first direction. May be. In this case, the pressure can be detected by the second sensor at the position where the distance from the adjacent gate is the longest.

A method of manufacturing an electricity storage module according to one aspect of the present invention relates to an electricity storage module that includes an electrode stack including a plurality of electrodes stacked in a first direction, and a sealing member that surrounds the electrode stack when viewed from the first direction. A manufacturing method, wherein the plurality of electrodes include a bipolar electrode, each of the plurality of electrodes comprises an electrode plate, the manufacturing method is an electrode stack, a primary seal provided at the edge of the electrode plate, And a step of forming a secondary seal surrounding the primary seal as viewed from the first direction by injection molding using a mold. Using the mold to which the first jig is attached, the step of forming the first resin portion on the side surface of the unit laminated body extending in the first direction, and the mold to which the second jig is attached, And a step of forming a second resin portion on a side surface of the first resin portion extending in the first direction. In the step of forming the first resin portion, the first resin portion is formed by the first sensor provided in the mold. In the step of detecting the pressure of the first resin material forming the second resin portion and forming the second resin portion, the pressure of the second resin material forming the second resin portion is detected by the second sensor provided in the second jig. To detect.

In the method for manufacturing the electricity storage module, in the step of forming the first resin portion, in addition to detecting the pressure of the first resin material forming the first resin portion by the first sensor provided in the mold, In the step of forming the resin portion, the pressure of the second resin material forming the second resin portion is detected by the second sensor provided on the second jig. Therefore, these pressures can be monitored.

According to one aspect of the present invention, it is possible to provide a manufacturing apparatus and a manufacturing method of an electricity storage module capable of monitoring the pressure of a resin material when a secondary seal having a plurality of resin portions is formed by injection molding.

It is a schematic sectional drawing which shows the electrical storage apparatus provided with the electrical storage module which concerns on one Embodiment. It is a schematic sectional drawing which shows the internal structure of the electrical storage module shown by FIG. FIG. 3 is a perspective view of the electricity storage module shown in FIG. 2. FIG. 4 is a perspective view showing a part of the power storage module shown in FIG. 3. FIG. 5 is a cross-sectional view taken along the line VV shown in FIG. 4. FIG. 6 is an enlarged view of a part of the cross-sectional view of the electricity storage module shown in FIG. 5. It is a top view which shows the 1st resin part seen from the 2nd direction. It is a top view which shows the 2nd resin part seen from the 2nd direction. It is a top view which shows the manufacturing apparatus of the electrical storage module which concerns on one Embodiment. It is a top view which shows the manufacturing apparatus of the electrical storage module which concerns on one Embodiment. It is a perspective view which shows the jig part of a 1st jig. It is a perspective view which shows the jig part of a 2nd jig. FIG. 10 is a sectional view taken along line XIII-XIII in FIG. 9. FIG. 11 is a sectional view taken along line XIV-XIV in FIG. 10. It is sectional drawing of a unit laminated body in a process of forming a 1st resin part, a type|mold, and a 1st jig. It is sectional drawing of a unit laminated body, a 1st resin part, a type|mold, and a 2nd jig in the process of forming a 2nd resin part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and overlapping description will be omitted.

FIG. 1 is a schematic cross-sectional view showing a power storage device including a power storage module according to an embodiment. Power storage device 1 shown in FIG. 1 is used as a battery in various vehicles such as forklifts, hybrid vehicles, electric vehicles, and the like. The electricity storage device 1 includes an electricity storage module laminate 2 in which a plurality of electricity storage modules 4 are laminated, and a restraining member 3 that applies a restraining load to the electricity storage module laminate 2 in the laminating direction.

The power storage module laminate 2 is composed of a plurality (three in this embodiment) of power storage modules 4 and a plurality (four in this embodiment) of conductive plates 5. The power storage module 4 is, for example, a bipolar battery including a bipolar electrode 14 described later, and has a rectangular shape when viewed from the stacking direction. The electricity storage module 4 is, for example, a secondary battery such as a nickel hydrogen secondary battery, a lithium ion secondary battery, or an electric double layer capacitor. In the following description, a nickel-hydrogen secondary battery will be exemplified.

The electricity storage modules 4 adjacent to each other in the stacking direction are electrically connected to each other via the conductive plate 5. The conductive plates 5 are arranged between the power storage modules 4 adjacent to each other in the stacking direction and outside the power storage module 4 located at the stacking end. A positive electrode terminal 6 is connected to one conductive plate 5 arranged outside the power storage module 4 located at the stacking end. The negative electrode terminal 7 is connected to the other conductive plate 5 arranged outside the power storage module 4 located at the stacking end. The positive electrode terminal 6 and the negative electrode terminal 7 are drawn out, for example, from an edge portion of the conductive plate 5 in a direction intersecting with the stacking direction. The power storage device 1 is charged and discharged by the positive electrode terminal 6 and the negative electrode terminal 7.

Inside each conductive plate 5, a plurality of flow paths 5a for circulating a refrigerant such as air are provided. Each flow path 5a extends in parallel with each other, for example, in a direction intersecting (orthogonal to) the stacking direction and the pull-out direction of the positive electrode terminal 6 and the negative electrode terminal 7, respectively. By allowing the coolant to flow through these flow paths 5a, the conductive plate 5 functions as a connecting member that electrically connects the power storage modules 4 to each other and also as a heat dissipation plate that radiates the heat generated in the power storage module 4. It also has functions. In addition, in the example of FIG. 1, the area of the conductive plate 5 viewed from the stacking direction is smaller than the area of the power storage module 4, but from the viewpoint of improving heat dissipation, the area of the conductive plate 5 is the area of the power storage module 4. May be the same as, and may be larger than the area of the electricity storage module 4.

The restraint member 3 includes a pair of end plates 8 that sandwich the power storage module laminate 2 in the stacking direction, and a fastening bolt 9 and a nut 10 that fasten the end plates 8 to each other. The end plate 8 is a rectangular metal plate having an area that is slightly larger than the areas of the power storage module 4 and the conductive plate 5 when viewed in the stacking direction. An electrically insulating film F is provided on the inner surface of the end plate 8 (the surface on the side of the power storage module laminate 2 ). The film F insulates the end plate 8 and the conductive plate 5 from each other.

The edge portion of the end plate 8 is provided with an insertion hole 8 a at a position outside the power storage module laminate 2. The fastening bolt 9 is passed from the insertion hole 8a of the one end plate 8 toward the insertion hole 8a of the other end plate 8, and the tip end portion of the fastening bolt 9 protruding from the insertion hole 8a of the other end plate 8 is , The nut 10 is screwed. As a result, the power storage module 4 and the conductive plate 5 are sandwiched by the end plates 8 to be unitized as the power storage module laminate 2, and a restraining load is applied to the power storage module laminate 2 in the stacking direction.

Next, the configuration of the power storage module 4 will be described in more detail. FIG. 2 is a schematic cross-sectional view showing the internal configuration of the power storage module shown in FIG. As shown in the same figure, the electricity storage module 4 includes an electrode laminated body 11 including a plurality of electrodes E laminated in the laminating direction D1 (first direction) and a sealing member surrounding the electrode laminated body 11 when viewed from the laminating direction D1. 12 and. The space between the electrode laminate 11 and the seal member 12 is sealed.

The electrode stack 11 includes a plurality of electrodes E stacked in the stacking direction D1 with the separator 13 interposed therebetween. The plurality of electrodes E include a plurality of bipolar electrodes 14, a negative electrode termination electrode 18, and a positive electrode termination electrode 19. In this example, the stacking direction D1 of the electrode stack 11 coincides with the stacking direction of the power storage module stack 2. The bipolar electrode 14 includes an electrode plate 15, a positive electrode 16 provided on one surface 15 a of the electrode plate 15, and a negative electrode 17 provided on the other surface 15 b of the electrode plate 15. The positive electrode 16 is a positive electrode active material layer formed by applying a positive electrode active material. The negative electrode 17 is a negative electrode active material layer formed by applying a negative electrode active material. In the electrode stacked body 11, the positive electrode 16 of the one bipolar electrode 14 faces the negative electrode 17 of the one bipolar electrode 14 adjacent in the stacking direction D1 with the separator 13 interposed therebetween. In the electrode stack 11, the negative electrode 17 of one bipolar electrode 14 faces the positive electrode 16 of the other bipolar electrode 14 that is adjacent in the stacking direction D1 with the separator 13 interposed therebetween.

In the electrode laminated body 11, the negative electrode termination electrode 18 is arranged at one end in the lamination direction D1, and the positive electrode termination electrode 19 is arranged at the other end in the lamination direction D1. The negative terminal electrode 18 includes the electrode plate 15 and the negative electrode 17 provided on the other surface 15 b of the electrode plate 15. The negative electrode 17 of the negative terminal electrode 18 faces the positive electrode 16 of the bipolar electrode 14 at one end in the stacking direction D1 via the separator 13. One surface 15a of the electrode plate 15 of the negative terminal electrode 18 is in contact with the one conductive plate 5 adjacent to the power storage module 4. The positive terminal electrode 19 includes an electrode plate 15 and a positive electrode 16 provided on one surface 15 a of the electrode plate 15. The other surface 15b of the electrode plate 15 of the positive terminal electrode 19 is in contact with the other conductive plate 5 adjacent to the power storage module 4. The positive electrode 16 of the positive electrode termination electrode 19 faces the negative electrode 17 of the bipolar electrode 14 at the other end in the stacking direction D1 with the separator 13 interposed therebetween.

The electrode plate 15 is made of metal and is made of, for example, nickel or a nickel-plated steel plate. The electrode plate 15 is a rectangular metal foil made of nickel, for example. The peripheral portion 15c of the electrode plate 15 (peripheral portion of the bipolar electrode 14) has a rectangular frame shape and is an uncoated region where the positive electrode active material and the negative electrode active material are not coated. Examples of the positive electrode active material forming the positive electrode 16 include nickel hydroxide. Examples of the negative electrode active material forming the negative electrode 17 include a hydrogen storage alloy. In the present embodiment, the formation area of the negative electrode 17 on the other surface 15b of the electrode plate 15 is slightly larger than the formation area of the positive electrode 16 on the one surface 15a of the electrode plate 15.

The separator 13 is formed in a sheet shape, for example. Examples of the separator 13 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), and a woven or non-woven fabric made of polypropylene, methyl cellulose and the like. The separator 13 may be reinforced with a vinylidene fluoride resin compound. The separator 13 is not limited to the sheet shape, and a bag shape may be used.

The seal member 12 is formed of, for example, an insulating resin in a rectangular frame shape. Examples of the resin material forming the seal member 12 include polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), and the like. The seal member 12 surrounds the electrode laminate 11 and holds the peripheral portions 15c of the plurality of electrode plates 15.

The seal member 12 includes a primary seal 21 provided on the peripheral edge portion 15c and a secondary seal 22 surrounding the primary seal 21 when viewed from the stacking direction D1. The primary seal 21 is a film having a predetermined thickness (length in the laminating direction D1). The primary seal 21 has a rectangular frame shape when viewed from the stacking direction D1, and is continuously welded over the entire circumference of the peripheral edge portion 15c by, for example, ultrasonic waves or heat. The primary seal 21 is provided on the peripheral edge portion 15c on the other surface 15b side of the electrode plate 15. The primary seal 21 is provided in the peripheral portion 15c in a state where the peripheral portion 15c is buried, and covers the end surface of the electrode plate 15. The primary seal 21 is provided apart from the positive electrode 16 and the negative electrode 17 when viewed in the stacking direction D1. The primary seals 21 adjacent to each other in the stacking direction D1 are in contact with each other.

The primary seal 21 has a first portion 21a and a second portion 21b. The first portion 21a is provided on the other surface 15b and overlaps the electrode plate 15 when viewed in the stacking direction D1. The second portion 21b is formed integrally with the first portion 21a, and is provided outside the electrode plate 15 when viewed in the stacking direction D1. The thickness of the first portion 21a is smaller than the thickness of the second portion 21b and is equal to the thickness of the negative electrode 17, but may be equal to or greater than that. A step surface 21c extending in the stacking direction D1 is formed between the first portion 21a and the second portion 21b.

The outer edge of the separator 13 is arranged on the upper surface of the first portion 21a. When viewed from the stacking direction D1, the first portion 21a and the outer edge portion of the separator 13 overlap each other. The outer edge portion of the separator 13 is fixed to the upper surface of the first portion 21a by, for example, welding at a plurality of positions arranged along the outer edge of the separator 13. The outer edge of the separator 13 may be in contact with the step surface 21c or may be separated from the step surface 21c. In the present embodiment, the height of the step surface 21c (the length in the stacking direction D1) is equal to the sum of the thickness of the separator 13 and the thickness of the positive electrode 16, but may be equal to or higher than that.

The secondary seal 22 is provided outside the electrode laminate 11 and the primary seal 21, and constitutes the outer wall (housing) of the power storage module 4. The secondary seal 22 is formed, for example, by resin injection molding as described later, and extends over the entire length of the electrode laminated body 11 in the laminating direction D1. The secondary seal 22 is a cylindrical portion extending with the stacking direction D1 as the axial direction. The secondary seal 22 covers the outer surface of the primary seal 21 extending in the stacking direction D1. The secondary seal 22 is joined to the outer surface of the primary seal 21 to seal the outer surface of the primary seal 21. The secondary seal 22 is welded to the outer surface of the primary seal 21 by, for example, heat during injection molding. The resin material forming the primary seal 21 and the resin material forming the secondary seal 22 are compatible with each other. The primary seal 21 is made of, for example, PP, and the secondary seal 22 is made of, for example, modified PPE.

A plurality of internal spaces V are provided in the electrode laminated body 11. Each internal space V is provided between a plurality of adjacent electrodes E. The internal space V is a space that is partitioned between the electrode plates 15 adjacent to each other in the stacking direction D1 by the electrode plate 15 and the seal member 12 in an airtight and watertight manner. In this internal space V, an electrolytic solution (not shown) made of an alkaline aqueous solution such as an aqueous potassium hydroxide solution is contained. The electrolytic solution is impregnated in the separator 13, the positive electrode 16, and the negative electrode 17. Since the electrolytic solution is strongly alkaline, the sealing member 12 is made of a resin material having strong alkaline resistance.

FIG. 3 is a perspective view of the electricity storage module 4 shown in FIG. As shown in FIG. 3, the electricity storage module 4 further includes a plurality (here, four) of pressure adjusting valves 28. The pressure adjusting valve 28 can adjust the pressure in the internal space V by discharging the gas in the internal space V to the outside of the power storage module 4. The outer shape of the secondary seal 22 has, for example, a rectangular frame shape when viewed from the stacking direction D1. The secondary seal 22 has a first side portion 22a, a second side portion 22b, and a pair of third side portions 22c, 22c. When viewed from the stacking direction D1, the first side portion 22a and the second side portion 22b are short side portions of the secondary seal 22, and the pair of third side portions 22c and 22c are long side portions of the secondary seal 22.

Each third side portion 22c extends in the longitudinal direction D2 (second direction) intersecting the stacking direction D1. Each third side portion 22c connects the first side portion 22a and the second side portion 22b to each other. The first side portion 22a and the second side portion 22b extend in a lateral direction D3 (third direction) that intersects both the stacking direction D1 and the longitudinal direction D2. The first side portion 22a and the second side portion 22b connect the pair of third side portions 22c, 22c to each other. The stacking direction D1, the longitudinal direction D2, and the lateral direction D3 may be orthogonal to each other. The first side portion 22a and the second side portion 22b face each other in the longitudinal direction D2. The pair of third side portions 22c, 22c face each other in the lateral direction D3. The pressure regulating valve 28 is attached to the first side portion 22a, but may be attached to one third side portion 22c.

FIG. 4 is a perspective view showing a part of the electricity storage module 4 shown in FIG. FIG. 5 is a cross-sectional view taken along the line VV shown in FIG. FIG. 6 is an enlarged view of a part of the cross-sectional view of power storage module 4 shown in FIG. 4 and 5, the pressure regulating valve 28 is omitted.

As shown in FIGS. 4 to 6, the secondary seal 22 includes a first resin portion 23 and a second resin portion 24. The outer shape of the first resin portion 23 has, for example, a rectangular tubular shape when viewed from the stacking direction D1. The first resin portion 23 is arranged between the primary seal 21 and the second resin portion 24 when viewed in the stacking direction D1. The first resin portion 23 surrounds the primary seal 21 when viewed from the stacking direction D1. The first resin portion 23 is provided on the side surface 21s extending in the stacking direction D1 of the primary seal 21.

The outer shape of the second resin portion 24 has, for example, a rectangular tubular shape when viewed from the stacking direction D1. The second resin portion 24 surrounds the first resin portion 23 when viewed from the stacking direction D1. The second resin portion 24 is provided on the side surface 23s extending in the laminating direction D1 of the first resin portion 23. The second resin portion 24 has a plurality of protrusions 24p protruding in the longitudinal direction D2. Each protrusion 24p has a frame shape that forms a plurality (here, six) of openings 24h. Each protrusion 24p functions as a connecting protrusion for connecting the pressure regulating valve 28. Therefore, the number of protrusions 24p is the same as the number of pressure regulating valves 28. A portion of the second resin portion 24 included in the first side portion 22a has a protrusion 24p.

As shown in FIG. 5, the first resin portion 23 and the second resin portion 24 are located outside the unit laminated body 30 including the primary seal 21 and the electrode laminated body 11 in the longitudinal direction D2. The unit stacked body 30 has a rectangular first surface 30a intersecting the stacking direction D1, a rectangular second surface 30b opposite to the first surface 30a, and four rectangular shapes extending in the stacking direction D1. And a side surface 30c thereof. The first surface 30a includes the surface of the positive electrode termination electrode 19. The second surface 30b includes the surface of the negative electrode termination electrode 18. The side surface 30c includes the side surface 21s (see FIG. 6) of the primary seal 21 extending in the stacking direction D1. The side surface 30c connects the first surface 30a and the second surface 30b.

The first resin portion 23 has an eaves portion 23b provided on the peripheral portion of the first surface 30a and side portions 23c located on each side surface 30c. The eaves portion 23b extends from the one end of the first resin portion 23 in the laminating direction D1 to the inside of the electrode laminated body 11. The eaves portion 23b has a frame shape that covers the entire peripheral edge of the first surface 30a. The side portion 23c has a cylindrical shape that surrounds the unit stacked body 30 when viewed from the stacking direction D1. The second resin portion 24 has an eave portion 24b provided on the peripheral portion of the second surface 30b and a side portion 24c located on the side portion 23c of the first resin portion 23. The eaves portion 24b has a frame shape that covers the entire peripheral edge of the second surface 30b. The side portion 24c has a cylindrical shape surrounding the side portion 23c of the first resin portion 23 when viewed from the stacking direction D1.

The primary seal 21 is formed with a first communication hole 21d that communicates with each internal space V (see FIG. 6). The first resin portion 23 is formed with a second communication hole 23a that communicates with each of the first communication holes 21d. The second resin portion 24 is formed with a third communication hole 24a that communicates with each second communication hole 23a. The width of the first communication hole 21d (the length of the first communication hole 21d in the stacking direction D1), the width of the second communication hole 23a (the length of the second communication hole 23a in the stacking direction D1), and the third communication hole 24a. Has the same width (the length of the third communication hole 24a in the stacking direction D1), for example. The width of the first communication hole 21d is, for example, the same as the height of the step surface 21c (the length of the step surface 21c in the stacking direction D1).

When viewed in the longitudinal direction D2, the protrusions 24p are arranged so as to surround the third communication holes 24a. Each third communication hole 24a communicates with the opening 24h formed by the protrusion 24p. The width of the opening 24h (the length of the opening 24h in the stacking direction D1) is larger than the width of the third communication hole 24a (the length of the third communication hole 24a in the stacking direction D1).

FIG. 7 is a plan view showing the first resin portion 23 viewed from the longitudinal direction D2. FIG. 7 shows a portion of the first resin portion 23 included in the first side portion 22a. As shown in FIG. 7, a plurality (here, 24) of second communication holes 23a (hereinafter, also referred to as second communication holes 23a1 to 23a24) are formed in the first resin portion 23. Each second communication hole 23a has, for example, a rectangular shape extending in the lateral direction D3 when viewed from the longitudinal direction D2. The positions of the second communication holes 23a1 to 23a24 in the stacking direction D1 are different from each other. As a result, each of the second communication holes 23a1 to 23a24 can communicate with different internal spaces V. The number of second communication holes 23a1 to 23a24 is the same as the number of internal spaces V. The second communication holes 23a1 to 23a24 are divided into a plurality of (here, four) groups. Each group includes a plurality of (here, six) second communication holes. The second communication holes 23a1 to 23a6 of the first group are connected to the first pressure regulating valve 28. The second communication holes 23a7 to 23a12 of the second group are connected to the second pressure regulating valve 28. The second communication holes 23a13 to 23a18 of the third group are connected to the third pressure regulating valve 28. The second communication holes 23a19 to 23a24 of the fourth group are connected to the fourth pressure regulating valve 28.

The second communication hole 23a1 is located at the end of the second communication holes 23a1 to 23a24 in the stacking direction D1. The first resin portion 23 has a convex portion 23p that protrudes in the stacking direction D1 outside the second communication hole 23a1. As a result, the width L of the portion of the first resin portion 23 located outside the second communication hole 23a1 in the stacking direction D1 increases. The second communication hole 23a7 is located at the end in the stacking direction D1 except for the second communication hole 23a1. The convex portion 23p is also provided outside the second communication hole 23a7. The second communication hole 23a13 is located at the end in the stacking direction D1 except for the second communication holes 23a1 and 23a7. The convex portion 23p is also provided outside the second communication hole 23a13. The second communication hole 23a19 is located at the most end in the stacking direction D1 except for the second communication holes 23a1, 23a7, 23a13. The convex portion 23p is also provided outside the second communication hole 23a19. These convex portions 23p are covered with the second resin portion 24 (overhang portion 24b) (see FIG. 5). The convex portion 23p is provided at the other end on the opposite side to the one end where the eaves portion 23b is provided in the stacking direction D1. In the present embodiment, the first resin portion 23 has a plurality of (four here) convex portions 23p, but may have a single convex portion 23p. In this case, the adjacent convex portions 23p are connected to each other in the lateral direction D3.

The first resin portion 23 has a plurality of gate marks 23q formed by injection molding. The plurality of gate marks 23q are arranged in the lateral direction D3 when viewed from the longitudinal direction D2. Each gate mark 23q is, for example, a cylindrical protrusion protruding in the stacking direction D1. When viewed in the longitudinal direction D2, the straight line W1 extending in the stacking direction D1 through the midpoints of the plurality of adjacent gate marks 23q is positioned so as not to overlap the second communication holes 23a1 to 23a24. The midpoint between the plurality of adjacent gate marks 23q is the midpoint of the center position of each gate mark 23q in the lateral direction D3. Therefore, the distance from the center position of each gate mark 23q to the straight line W1 in the lateral direction D3 is equal. In the lateral direction D3, the position of the gate mark 23q is deviated from the positions of the second communication holes 23a1 to 23a24. Although illustration is omitted, in the first resin portion 23, the portion included in the second side portion 22b and the portion included in the pair of third side portions 22c and 22c also have the gate mark 23q.

FIG. 8 is a plan view showing the second resin portion 24 viewed from the longitudinal direction D2. FIG. 8 shows a portion of the second resin portion 24 included in the first side portion 22a. As shown in FIG. 8, a plurality (here, 24) of third communication holes 24a (hereinafter, also referred to as third communication holes 24a1 to 24a24) are formed in the second resin portion 24. Each third communication hole 24a has, for example, a rectangular shape extending in the lateral direction D3 when viewed from the longitudinal direction D2. The number of the third communication holes 24a1 to 24a24 is the same as the number of the second communication holes 23a1 to 23a24. When viewed in the longitudinal direction D2, the third communication holes 24a1 to 24a24 are positioned so as to overlap the second communication holes 23a1 to 23a24, respectively. When viewed in the longitudinal direction D2, each of the third communication holes 24a1 to 24a24 is located in each opening 24h of the protrusion 24p.

The second resin portion 24 has a plurality of gate marks 24q formed by injection molding. The plurality of gate marks 24q are arranged in the lateral direction D3 when viewed from the longitudinal direction D2. Each gate mark 24q is, for example, a cylindrical protrusion protruding in the stacking direction D1. When viewed in the longitudinal direction D2, the straight line W2 extending in the stacking direction D1 through the midpoints of the plurality of adjacent gate marks 24q is positioned so as not to overlap the protrusion 24p. The midpoint between the plurality of adjacent gate marks 24q is the midpoint of the center position of each gate mark 24q in the lateral direction D3. Therefore, the distance from the center position of each gate mark 24q to the straight line W2 in the lateral direction D3 is equal. The position of the gate mark 24q is displaced from the position of the protrusion 24p in the lateral direction D3. Although illustration is omitted, in the second resin portion 24, a portion included in the second side portion 22b and a portion included in the pair of third side portions 22c also have gate marks 24q.

Next, the manufacturing apparatus 100 for the power storage module 4 will be described with reference to FIGS. 9 to 13. FIG. 9 and FIG. 10 are top views showing an electric storage module manufacturing apparatus according to one embodiment. FIG. 11 is a perspective view showing a jig portion of the first jig. FIG. 12 is a perspective view showing a jig portion of the second jig. FIG. 13 is a sectional view taken along line XIII-XIII in FIG. FIG. 14 is a sectional view taken along line XIV-XIV in FIG.

As shown in FIGS. 9 to 14, the manufacturing apparatus 100 includes a mold M for forming the secondary seal 22 by injection molding, a first jig 40 and a second jig 40 detachably attached to the mold M. The jig 50 includes a plurality of first sensors P1 and a plurality of second sensors P2. The manufacturing apparatus 100 is an injection molding machine that forms the secondary seal 22 by injection molding. FIG. 9 shows a state in which the first jig 40 is attached to the mold M. FIG. 10 shows a state in which the second jig 50 is attached to the mold M. The mold M is, for example, a metal mold. The mold M has a pair of molds M1 and M2 facing each other. The facing direction of the pair of molds M1 and M2 coincides with the stacking direction D1. In FIGS. 9 and 10, the mold M2 is not shown.

The first jig 40 is used to form the first resin portion 23 by injection molding. The first jig 40 has a shape corresponding to the shape of the first resin portion 23. As shown in FIG. 9, the first jig 40 is attached to the mold M1. In the mold closed state in which the mold M1 to which the first jig 40 is attached and the mold M2 are combined with each other, a space S1 is formed inside the pair of molds M1 and M2. The first jig 40 has a jig portion 41 and a jig portion 42. The jig portion 41 is used to form a portion of the first resin portion 23 included in the second side portion 22b and the pair of third side portions 22c, 22c. The jig portion 41 does not have a nest.

The jig portion 42 is used to form a portion of the first resin portion 23 included in the first side portion 22a. As shown in FIG. 11, the jig portion 42 has a main body 43, a plurality of nests 44, and a ridge portion 45. The main body 43 has a rectangular side surface 43a facing the space S1. The side surface 43a extends in the lateral direction D3 and the stacking direction D1. The plurality of nests 44 project from the side surface 43a into the space S1 along the longitudinal direction D2. The plurality of nests 44 are arranged in the longitudinal direction D2 when viewed from the stacking direction D1. The nest 44 is arranged in the first communication hole 21d and forms the second communication hole 23a. The nest 44 is, for example, a metal plate. The shape of the nest 44 corresponds to the shape of the first communication hole 21d and the shape of the second communication hole 23a. The protruding portion 45 extends along the lateral direction D3 at one end of the side surface 43a in the stacking direction D1. The protruding portion 45 projects in the space S1 along the longitudinal direction D2.

The second jig 50 is used to form the second resin portion 24 by injection molding. The second jig 50 has a shape corresponding to the shape of the second resin portion 24. As shown in FIG. 10, the second jig 50 is attached to the mold M1. In the mold closed state in which the mold M1 to which the second jig 50 is attached and the mold M2 are combined with each other, a space S2 is formed inside the pair of molds M1 and M2. The space S2 is wider than the space S1. The second jig 50 has a jig portion 51 (first jig portion) and a jig portion 52 (second jig portion). The jig portion 51 is used to form a portion of the second resin portion 24 that is included in the second side portion 22b and the pair of third side portions 22c and 22c. The jig portion 51 does not have a nest.

The jig portion 52 is used to form a portion of the first resin portion 23 included in the first side portion 22a. As shown in FIG. 12, the jig portion 52 has a main body 53, a plurality of nests 54, and a protruding portion 55. The main body 53 has a rectangular side surface 53a facing the space S2. The plurality of nests 54 protrude from the side surface 53a into the space S2 along the longitudinal direction D2. The plurality of nests 54 are arranged in the longitudinal direction D2 when viewed from the stacking direction D1. The insert 54 is disposed in the second communication hole 23a and forms the third communication hole 24a. The nest 54 may be arranged in the second communication hole 23a and the first communication hole 21d. The nest 54 is, for example, a metal plate. The shape of the insert 54 corresponds to the shape of the second communication hole 23a and the shape of the third communication hole 24a. The protruding portion 55 extends along the lateral direction D3 at one end of the side surface 53a in the stacking direction D1. The protruding portion 55 projects into the space S1 along the longitudinal direction D2. Although not shown in FIG. 12, a recess for forming the protrusion 24p (see FIG. 5) is formed on the side surface 53a.

The first sensor P1 is provided in the mold M2 as shown in FIG. The first sensor P1 faces the space S1 and detects the pressure of the first resin material forming the first resin portion 23 (see FIG. 2). As shown in FIG. 14, the second sensor P2 is provided on the side surface 53a of the jig portion 52 of the second jig 50. The second sensor P2 faces the space S2 and detects the pressure of the second resin material forming the second resin portion 24 (see FIG. 2). Also in FIG. 14, the illustration of the concave portion for forming the protrusion 24p (see FIG. 5) is omitted.

As shown in FIG. 13, the mold M2 has a plurality of gates G1 into which the first resin material is injected. The first resin material is injected into the space S1 through each gate G1 in a molten state. The gates G1 are provided side by side over the entire circumference of the outer edge portion of the space S1 so as to overlap the outer edge portion of the space S1 when viewed in the stacking direction D1. The first sensor P1 is provided on a straight line Mw1 extending in the stacking direction D1 through the midpoint between a pair of gates G1 and G1 adjacent to each other when viewed in the longitudinal direction D2. That is, the first sensor P1 is provided at a position where the distances from the pair of adjacent gates G1 are equal when viewed in the longitudinal direction D2. When viewed in the stacking direction D1, the first sensor P1 is provided at a position that does not overlap the nest 44. The straight line Mw1 is located so as not to overlap with the second communication hole 23a (the nest 44). The shape of the gate G1 corresponds to the gate mark 23q in FIG. The straight line Mw1 corresponds to the straight line W1 in FIG. 7.

As shown in FIG. 14, the mold M2 has a plurality of gates G2 into which the second resin material is injected. The second resin material is injected into the space S2 through each gate G2 in a molten state. The gates G2 are provided side by side over the entire circumference of the outer edge portion of the space S2 so as to overlap the outer edge portion of the space S2 when viewed in the stacking direction D1. The second sensor P2 is provided on the straight line Mw2 extending in the stacking direction D1 through the midpoint between the pair of gates G2 and G2 adjacent to each other when viewed in the longitudinal direction D2. That is, the second sensor P2 is provided at a position where the distances from the pair of adjacent gates G2 and G2 are equal to each other when viewed in the longitudinal direction D2. The second sensor P2 is provided at a position that does not overlap the nest 54 when viewed from the stacking direction D1. The shape of the gate G2 corresponds to the gate mark 24q in FIG. The straight line Mw2 corresponds to the straight line W2 in FIG.

Then, the manufacturing method of the electrical storage module 4 is demonstrated. The method for manufacturing the electricity storage module 4 includes a step of preparing the unit laminate body 30 and a step of forming the secondary seal 22.

(Unit stack preparation process)
First, the unit laminated body 30 including the electrode laminated body 11 and the primary seal 21 is prepared. In this step, the primary seal 21 and the separator 13 are attached to the bipolar electrode 14 to produce a unit. Similarly, the primary seal 21 and the separator 13 are attached to the negative terminal electrode 18 to produce a unit. A primary seal 21 is attached to the positive electrode terminal electrode 19 to produce a unit. A unit laminate 30 is obtained by laminating these units.

(Process of forming secondary seal)
Next, the secondary seal 22 that surrounds the primary seal 21 when viewed from the stacking direction D1 is formed by injection molding using the mold M. This step includes a step of forming the first resin portion 23 and a step of forming the second resin portion 24. The step of forming the first resin portion 23 and the step of forming the second resin portion 24 are performed in this order.

FIG. 15 is a cross-sectional view of the unit laminated body, the mold, and the first jig in the step of forming the first resin portion. As shown in FIG. 15, in this step, the mold M to which the first jig 40 is attached is used to form the first resin portion 23 (see FIG. 5) on the side surface 30c of the unit laminate 30. First, the unit laminated body 30 is housed in the space S1 inside the mold M to which the first jig 40 is attached. Specifically, for example, after the jig portion 41 (see FIG. 9) is attached to the mold M1, the unit laminated body 30 is placed in the mold M1. Subsequently, the jig portion 42 is attached to the mold M1. At this time, the nest 44 of the jig portion 42 is arranged in the corresponding first communication hole 21d (see FIG. 6). Finally, the mold M1 is combined with the mold M2.

In this way, the first resin portion 23 (see FIG. 5) is formed by injection molding with the unit laminated body 30 accommodated in the space S1. The molten first resin material is injected into the space S1 from the gate G1 formed in the mold M2 in the stacking direction D1. The shape of the portion of the space S1 excluding the unit laminated body 30 corresponds to the shape of the first resin portion 23. In this step, the pressure of the first resin material is detected by the first sensor P1 provided on the mold M2. Thus, the first resin portion 23 can be formed while monitoring the pressure of the first resin material.

FIG. 16 is a cross-sectional view of the unit laminated body, the mold, and the second jig in the step of forming the second resin portion. As shown in FIG. 16, in this step, the second resin portion 24 (see FIG. 5) is formed on the side surface 23s of the first resin portion 23 using the mold M to which the second jig 50 is attached. First, the unit laminated body 30 and the first resin portion 23 are housed in the space S2 inside the mold M to which the second jig 50 is attached. Specifically, for example, after the jig portion 51 (see FIG. 10) is attached to the mold M1, the unit laminated body 30 and the first resin portion 23 are arranged in the mold M1. Subsequently, the jig portion 52 is attached to the mold M1. At this time, the nest 54 of the jig portion 52 is arranged in the corresponding second communication hole 23a (see FIG. 6). Finally, the mold M1 is combined with the mold M2.

In this way, the second resin portion 24 (see FIG. 5) is formed by injection molding with the unit laminate 30 and the first resin portion 23 accommodated in the space S2. The molten second resin material is injected into the space S2 from the gate G2 formed in the mold M2 in the stacking direction D1. The shape of the portion of the space S2 excluding the unit laminated body 30 and the first resin portion 23 corresponds to the shape of the second resin portion 24. The side surface 53a is provided with a recess for forming the protrusion 24p (see FIG. 5). In this step, the pressure of the second resin material is detected by the second sensor P2 (see FIG. 12) provided in the jig portion 52 of the second jig 50. Thereby, the second resin portion 24 can be formed while monitoring the pressure of the second resin material.

After forming the secondary seal 22 as described above, the electrolytic solution is injected into each internal space V from each of the third communication holes 24a1 to 24a24. After that, the pressure regulating valve 28 is connected to the protrusion 24p to seal the third communication holes 24a1 to 24a24. In this way, the electricity storage module 4 is manufactured.

As described above, the manufacturing apparatus of the electricity storage module 4 includes the first sensor P1 provided in the injection molding mold M and the second sensor P2 provided in the second jig 50. Thereby, the pressure of the first resin material forming the first resin portion 23 and the pressure of the second resin material forming the second resin portion 24 can be detected. Therefore, since the pressure monitoring of the first resin material in the space S1 and the pressure monitoring of the second resin material in the space S2 can be performed, for example, the occurrence of a short circuit between the first resin material and the second resin material is suppressed. be able to. As a result, the quality of the secondary seal 22 can be improved. Since the first sensor P1 is provided in the mold M, for example, the first jig 40 can be easily attached to and detached from the mold M without considering the wiring of the first sensor P1 and the like. Further, since the second jig 50 is configured to be attachable/detachable to/from the mold M, it is not normally considered that the second sensor P2 is provided on the second jig 50, but the second sensor P2 is It can be attached only to the second jig 50.

In the method of manufacturing the electricity storage module 4, the step of forming the secondary seal 22 includes a step of forming the first resin portion 23 and a step of forming the second resin portion 24. Therefore, the thickness of the formed first resin portion 23 and second resin portion 24 can be made smaller than the thickness of the entire secondary seal 22. Thereby, when the first resin portion 23 and the second resin portion 24 are formed by injection molding, voids are formed inside the secondary seal 22 due to the contraction of the melted first resin material and second resin material. It can be suppressed from occurring. Further, in this manufacturing method, the pressure of the first resin material is detected by the first sensor P1 provided on the injection molding die M, and the second resin material is detected by the second sensor P2 provided on the second jig 50. The pressure is detected. Therefore, since the pressure monitoring of the first resin material in the space S1 and the pressure monitoring of the second resin material in the space S2 can be performed, for example, the occurrence of a short circuit between the first resin material and the second resin material is suppressed. be able to. As a result, the quality of the secondary seal 22 can be improved.

Since the first jig 40 has the nest 44, the flow of the first resin material is complicated. Therefore, for example, a short circuit of the first resin material occurs, and the quality of the first resin portion 23 is likely to deteriorate. In this embodiment, since the pressure of the first resin material can be monitored by the first sensor P1, it is possible to suppress the deterioration of the quality of the first resin portion 23.

The mold M has a plurality of gates G1 into which the first resin material is injected, and the first sensor P1 is provided at a position where the distances from a pair of adjacent gates G1 and G1 when viewed in the longitudinal direction D2 are equal to each other. Has been. At this position, the distance from the pair of gates G1 and G1 is the longest, so that a short circuit of the first resin material is likely to occur. In addition, the injected first resin materials may collide with each other to form a fragile portion (weld portion). Since the first sensor P1 can monitor the pressure at such a position, the injection molding condition can be efficiently set. Therefore, the quality of the first resin portion 23 can be improved.

Since the second jig 50 has the nest 54, the flow of the second resin material is complicated. Therefore, for example, a short circuit of the second resin material occurs, and the quality of the second resin portion 24 is likely to deteriorate. In this embodiment, since the pressure of the second resin material can be monitored by the second sensor P2, it is possible to suppress the deterioration of the quality of the second resin portion 24. Since the second jig 50 has a complicated shape due to the nest 54, it is not usually considered that the second sensor P2 is provided on the second jig 50.

The second jig 50 includes a jig portion 51 having no nest and a jig portion 52 having a nest 54. Since the second sensor P2 is provided in the jig portion 52 that complicates the flow of the second resin material, it is possible to reliably suppress the deterioration of the quality of the second resin portion 24.

The mold M has a plurality of gates G2 into which the second resin material is injected, and the second sensor P2 is provided at a position where the distances from a pair of adjacent gates G2 and G2 are equal to each other when viewed in the longitudinal direction D2. Has been. At this position, the distance from the pair of gates G2 and G2 is the longest, so that a short circuit of the second resin material is likely to occur. Further, the injected second resin materials may collide with each other to form a fragile portion (weld portion). Since the second sensor P2 can monitor the pressure at such a position, the injection molding condition can be efficiently set. Therefore, the quality of the second resin portion 24 can be improved.

Although the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to the above embodiments.

For example, the secondary seal 22 may further include one or more resin portions provided on the side surface 24s of the second resin portion 24. In response to this, the manufacturing apparatus 100 has one or a plurality of jigs having a shape corresponding to the shape of these resin parts and detachably attached to the mold M, and one or a plurality of jigs. The device may further include one or more sensors provided in the tool. As a result, the pressure of each resin material can be monitored and the quality of the secondary seal can be improved.

In the manufacturing apparatus 100, a part of the mold M may be a movable part that moves in accordance with the shape of the resin part to be formed, and part of the first jig 40 and the second jig 50 may be replaced with the movable part. .. In this case, by disposing the first sensor P1 in a portion other than the movable portion of the mold M, it is possible to prevent the configuration of the movable portion from becoming complicated. Further, since the second sensor P2 is provided on the second jig 50, it is possible to prevent the structure of the movable part from becoming complicated.

4... Electric storage module, 11... Electrode laminated body, 12... Sealing member, 14... Bipolar electrode, 15... Electrode plate, 15c... Peripheral part, 21... Primary seal, 22... Secondary seal, 21d... 1st communicating hole, 21s ... Side surface, 23... First resin portion, 23a... Second communication hole, 23s... Side surface, 24... Second resin portion, 24a... Third communication hole, 40... First jig, 44... Nest (first nest) , 50... Second jig, 51... Jig part (first jig part), 52... Jig part (second jig part) 54... Nest (second nest), 100... Manufacturing device, D1... Lamination Direction (first direction), D2... Longitudinal direction (second direction), E... Electrode, G1, G2... Gate, P1... First sensor, P2... Second sensor, M... type, M1, M2... type, V …Internal space.

Claims (6)

An apparatus for manufacturing an electricity storage module, comprising: an electrode laminated body including a plurality of electrodes laminated in a first direction; and a seal member surrounding the electrode laminated body when viewed from the first direction,
The plurality of electrodes includes a bipolar electrode,
Each of the plurality of electrodes includes an electrode plate,
The seal member includes a primary seal provided on a peripheral portion of the electrode plate, and a secondary seal surrounding the primary seal when viewed from the first direction,
The secondary seal has a first resin portion provided on a side surface of the primary seal extending in the first direction and a second resin portion provided on a side surface of the first resin portion extending in the first direction. With a resin part,
The manufacturing apparatus is
A mold for forming the secondary seal by injection molding,
A first jig which has a shape corresponding to the shape of the first resin portion and is detachably attached to the mold;
A second jig which has a shape corresponding to the shape of the second resin portion and which is detachably attached to the mold;
A first sensor provided on the mold for detecting a pressure of a first resin material forming the first resin portion;
An electric storage module manufacturing apparatus, comprising: a second sensor that is provided on the second jig and that detects a pressure of a second resin material that forms the second resin portion. The primary seal is provided with a first communication hole that communicates with an internal space provided between the adjacent electrodes.
The first jig has a first insert which is arranged in the first communication hole and forms a second communication hole in the first resin portion, the second communication hole communicating with the first communication hole. An apparatus for manufacturing an electricity storage module according to 1. 3. The second jig has a second insert which is disposed in the second communication hole and forms a third communication hole in the second resin portion, the third communication hole communicating with the second communication hole. An apparatus for manufacturing an electricity storage module according to 1. The second jig includes a first jig part having no nest, and a second jig part having the second nest,
The apparatus for manufacturing an electricity storage module according to claim 3, wherein the second sensor is provided in the second jig portion. The mold has a plurality of gates into which the second resin material is injected,
The said 2nd sensor is provided in the position where the distance from the said adjacent gate mutually becomes equal seeing from the 2nd direction which intersects the said 1st direction, The any one of Claims 1-3. Device for manufacturing the electricity storage module. A method of manufacturing an electricity storage module, comprising: an electrode stack including a plurality of electrodes stacked in a first direction; and a seal member surrounding the electrode stack when viewed from the first direction,
The plurality of electrodes includes a bipolar electrode,
Each of the plurality of electrodes includes an electrode plate,
The manufacturing method,
A step of preparing a unit laminated body including the electrode laminated body and a primary seal provided on an edge portion of the electrode plate;
Forming a secondary seal surrounding the primary seal by injection molding using a mold when viewed from the first direction,
The step of forming the secondary seal includes
Forming a first resin portion on a side surface of the unit laminated body extending in the first direction using the mold to which a first jig is attached;
Forming a second resin portion on a side surface of the first resin portion extending in the first direction by using the mold to which a second jig is attached,
In the step of forming the first resin portion, the pressure of the first resin material forming the first resin portion is detected by the first sensor provided in the mold,
In the step of forming the second resin portion, the method of manufacturing the electricity storage module, wherein the pressure of the second resin material forming the second resin portion is detected by the second sensor provided in the second jig.

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