JP2019200955A - Manufacturing method of power storage module - Google Patents

Abstract

To facilitate handling in manufacture of power storage module.SOLUTION: In a manufacturing method of a power storage module 4 where multiple bipolar electrodes 14 are laminated, respectively, via a separator 13, and electrolyte is injected between the bipolar electrodes 14 of an electrode laminate 11 sandwiched between a pair of negative terminal electrode 18 and a positive terminal electrode 19 via the separator 13, the electrode laminate 11 is transported to a liquid ejection place 100 by transportation step, pressure is applied to the pair of negative terminal electrode 18 and positive terminal electrode 19 until the interval of the pair of electrodes 18, 19 in the electrode laminate 11 becomes a specified dimension Zby a compression step after the transportation step, and the electrolyte is injected between the bipolar electrodes 14 by liquid injection step. Since transportation of the electrode laminate 11 confined by a heavy confinement plate is not required, handling is facilitated in manufacture of the power storage module 4.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for manufacturing a power storage module.

  In Patent Document 1, each of a plurality of bipolar electrodes each having an electrode part coated with an active material on an electrode plate is laminated via a separator, and a separator is provided between a pair of terminal electrodes having an electrode part on one side. An electrical storage module is disclosed in which an electrolytic solution is injected between the bipolar electrodes and between the termination electrode and the bipolar electrode of the laminate sandwiched therebetween.

JP-A-2018-18715

  By the way, when the electrolytic solution is injected between the bipolar electrodes and between the termination electrode and the bipolar electrode, the laminate is restrained by the restraint plate so that the distance between the pair of termination electrodes in the laminate is a specified dimension. Pressure needs to be applied to the termination electrode. Therefore, the laminated body restrained by the restraint plate is transported to the pouring place where the electrolytic solution is poured. However, the restraint plate has a weight of about 40 kg, and it is difficult to transport the laminated body restrained by the restraint plate manually. Therefore, it is desired to make handling easier in the manufacture of the power storage module.

  Therefore, an object of the present invention is to provide a method for manufacturing a power storage module that can be more easily handled in manufacturing the power storage module.

  In the present invention, each of a plurality of bipolar electrodes each having an electrode part coated with an active material on an electrode plate is laminated via a separator, and a separator is interposed between a pair of terminal electrodes having an electrode part on one side. A method of manufacturing an electricity storage module in which an electrolytic solution is injected between bipolar electrodes and between a termination electrode and a bipolar electrode of a sandwiched laminate, and a transporting step for transporting the laminate to a pouring site, and a transporting step After that, a pressurizing step of applying pressure to the pair of terminal electrodes until the distance between the pair of terminal electrodes in the laminate reaches a specified size, and injecting an electrolyte between the bipolar electrodes and between the terminal electrodes and the bipolar electrodes And a liquid injection process.

  According to this configuration, each of a plurality of bipolar electrodes each having an electrode portion coated with an active material on an electrode plate is laminated via the separator, and the separator is interposed between the pair of terminal electrodes having the electrode portion on one side. In the method of manufacturing an energy storage module in which an electrolyte is injected between the bipolar electrodes of the laminated body sandwiched between and between the termination electrode and the bipolar electrode, the laminated body is conveyed to the injection site by the conveying step, and conveyed After the step, pressure is applied to the pair of termination electrodes by the pressurization step until the distance between the pair of termination electrodes in the laminate reaches a specified size. By the liquid injection step, between the bipolar electrodes and between the termination electrode and the bipolar electrode, During this period, an electrolyte solution is injected. Thereby, conveyance of the laminated body restrained by the heavy restraint board becomes unnecessary, and the handling in manufacture of an electrical storage module becomes easier.

  In this case, in the pressurization step, the air pressure in the chamber is increased with respect to the laminated body enclosed in the chamber installed at the injection site until the distance between the pair of terminal electrodes reaches a specified dimension. Is preferably applied to the pair of terminal electrodes.

  According to this configuration, in the pressurization step, the gap between the pair of terminal electrodes is set to a specified size by increasing the atmospheric pressure in the chamber with respect to the stacked body enclosed in the chamber installed at the injection site. Therefore, the pressure until the distance between the pair of termination electrodes reaches a specified dimension can be easily applied to the pair of termination electrodes.

  In the pressurizing step, it is preferable to apply pressure to the pair of terminal electrodes until the distance between the pair of terminal electrodes reaches a specified dimension by a press machine installed at the injection site.

  According to this configuration, in the pressurizing step, the pressure until the interval between the pair of terminal electrodes reaches a specified dimension is applied to the pair of terminal electrodes by a press machine installed at the liquid injection site. Pressure until the distance between the terminal electrodes reaches a specified dimension can be applied to the pair of terminal electrodes.

  According to the method for manufacturing a power storage module of the present invention, handling in manufacturing the power storage module becomes easier.

It is a schematic sectional drawing which shows the electrical storage apparatus which concerns on 1st Embodiment. It is a schematic sectional drawing which shows the internal structure of the electrical storage module of FIG. It is a schematic sectional drawing which shows the outline of the conveyance process of the manufacturing method of the electrical storage module which concerns on 1st Embodiment. It is a longitudinal cross-sectional view which shows the outline of the pressurization process and liquid injection process of the manufacturing method of the electrical storage module which concerns on 1st Embodiment. It is a longitudinal cross-sectional view which shows the outline of the pressurization process and liquid injection process of the manufacturing method of the electrical storage module which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view showing an embodiment of a power storage device. The power storage device 1 shown in FIG. 1 is used as a battery for various vehicles such as forklifts, hybrid vehicles, and electric vehicles. The power storage device 1 includes a power storage module stack 2 formed by stacking a plurality of power storage modules 4 and a restraining member 3 that applies a restraining load to the power storage module stack 2 in the stacking direction.

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

  The power storage modules 4 and 4 adjacent to each other in the stacking direction are electrically connected through the conductive plate 5. The conductive plates 5 are respectively disposed between the power storage modules 4 and 4 adjacent in the stacking direction and the outside of the power storage module 4 positioned at the stacking end. A positive electrode terminal 6 is connected to one conductive plate 5 disposed outside the power storage module 4 located at the end of the stack. A negative electrode terminal 7 is connected to the other conductive plate 5 disposed 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 the edge of the conductive plate 5 in a direction crossing 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 to each other in a direction orthogonal to, for example, the stacking direction and the drawing direction of the positive electrode terminal 6 and the negative electrode terminal 7. By causing the refrigerant to flow through these flow paths 5a, the conductive plate 5 functions as a connecting member that electrically connects the power storage modules 4 and 4 and also dissipates heat generated in the power storage module 4. It also has the function as 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. It may be the same as or larger than the area of the power storage module 4.

  The restraining member 3 includes a pair of end plates 8 and 8 that sandwich the power storage module stack 2 in the stacking direction, and a fastening bolt 9 and a nut 10 that fasten the end plates 8 and 8 together. 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 as viewed from the stacking direction. On the inner side surface of the end plate 8 (the surface on the power storage module laminate 2 side), an electrically insulating film F is provided. The film F insulates the end plate 8 from the conductive plate 5.

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

  Next, the configuration of the power storage module 4 will be described in more detail. As illustrated in FIG. 2, the power storage module 4 includes an electrode stack 11 and a seal member 12 that seals (seals) the electrode stack 11.

  The electrode laminate 11 is a laminate in which a plurality of bipolar electrodes 14 are laminated via a separator 13 and sandwiched between a pair of negative electrode termination electrode 18 and positive electrode termination electrode 19 via a separator 13. 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 that is an electrode portion provided on one surface 15 a of the electrode plate 15, and a negative electrode 17 that is an electrode portion 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 coating a positive electrode active material. The negative electrode 17 is a negative electrode active material layer formed by coating a negative electrode active material. In the electrode stack 11, the positive electrode 16 of one bipolar electrode 14 faces the negative electrode 17 of one bipolar electrode 14 adjacent in the stacking direction D <b> 1 across the separator 13. 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 adjacent in the stacking direction D <b> 1 with the separator 13 interposed therebetween.

  In the electrode laminate 11, a negative electrode termination electrode 18 as a termination electrode is disposed at one end in the lamination direction D1, and a positive electrode termination electrode 19 as a termination electrode is disposed at the other end in the lamination direction D1. The negative electrode termination electrode 18 includes an electrode plate 15 and a negative electrode 17 that is an electrode portion provided on the other surface 15 b of the electrode plate 15. The negative electrode 17 of the negative electrode termination electrode 18 faces the positive electrode 16 of the bipolar electrode 14 at one end in the stacking direction D1 with the separator 13 interposed therebetween. One conductive plate 5 adjacent to the power storage module 4 is in contact with one surface 15 a of the electrode plate 15 of the negative electrode termination electrode 18. The positive electrode termination electrode 19 includes an electrode plate 15 and a positive electrode 16 that is an electrode portion provided on one surface 15 a of the electrode plate 15. The other conductive plate 5 adjacent to the power storage module 4 is in contact with the other surface 15 b of the electrode plate 15 of the positive electrode termination electrode 19. 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 outer edge portion 15c of the electrode plate 15 (the outer edge 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 applied. An example of the positive electrode active material constituting the positive electrode 16 is nickel hydroxide. As a negative electrode active material which comprises the negative electrode 17, a hydrogen storage alloy is mentioned, for example. In the present embodiment, the formation region of the negative electrode 17 on the other surface 15 b of the electrode plate 15 is slightly larger than the formation region of the positive electrode 16 on the one surface 15 a 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), a woven fabric or a non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, and the like. The separator 13 may be reinforced with a vinylidene fluoride resin compound. The separator 13 is not limited to a sheet shape, and may be a bag shape.

  The seal member 12 is made of, for example, an insulating resin. Examples of the resin material constituting the seal member 12 include polypropylene (PP), polyphenylene sulfide (PPS), and modified polyphenylene ether (modified PPE). The sealing member 12 surrounds the electrode laminate 11 and is configured to hold the outer edge portions 15 c of the plurality of electrode plates 15.

  The seal member 12 includes a frame-shaped primary seal 21 (resin frame) provided at the outer edge portion 15 c and a cylindrical secondary seal 22 (provided around the primary seal 21) that accommodates the electrode stack 11. Resin tube). The primary seal 21 is a film having a predetermined thickness (length in the stacking 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 outer edge portion 15c by, for example, ultrasonic waves or heat. The primary seal 21 is provided on the outer edge portion 15 c on the one surface 15 a side of the electrode plate 15. The primary seal 21 is provided on the outer edge portion 15 c with the outer edge portion 15 c embedded therein, 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 from the stacking direction D1. The primary seals 21 and 21 adjacent 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 one surface 15a and overlaps the electrode plate 15 when viewed from 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 from 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 positive electrode 16, but may be equal to or greater. 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 portion of the separator 13 is disposed 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, for example, by welding at a plurality of locations aligned 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 negative electrode 17, but may be equal to or greater.

  The secondary seal 22 surrounds the electrode stack 11 and the primary seal 21 and constitutes the outer wall (housing) of the power storage module 4. The secondary seal 22 is formed by, for example, resin injection molding, and extends over the entire length of the electrode stack 11 in the stacking direction D1. The secondary seal 22 has a rectangular cylindrical shape 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 and seals the outer surface of the primary seal 21. The secondary seal 22 is welded to the outer surface of the primary seal 21 by heat during injection molding, for example. The secondary seal 22 may be welded to the outer surface of the primary seal 21 by hot plate welding.

  Between the electrode plates 15 and 15 adjacent in the stacking direction D1, an internal space V partitioned by the electrode plate 15 and the seal member 12 in an airtight and watertight manner is formed. In the internal space V, an electrolytic solution (not shown) made of an alkaline aqueous solution such as an aqueous potassium hydroxide solution is accommodated. 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 seal member 12 is made of a resin material having strong alkali resistance.

  The primary seal 21 is provided with a liquid injection port 21p that extends in a direction intersecting (here, orthogonal) to the stacking direction D1 and communicates from each internal space V to the secondary seal 22. The secondary seal 22 is provided with a liquid injection port 22p that extends in a direction intersecting (here, orthogonal) to the stacking direction D1 and communicates with the outside of the power storage module 4 from the liquid injection port 21p of the primary seal 21. ing. The liquid injection port portions 21p and 22p function as a liquid injection port for injecting an electrolytic solution into each internal space V, and also function as a connection port for a pressure regulating valve (not shown) after the electrolytic solution is injected. To do.

  As described above, in the power storage module 4, each of the plurality of bipolar electrodes 14 having the positive electrode 16 or the negative electrode 17 coated on the electrode plate 15 on both surfaces is laminated via the separator 13, and the positive electrode 16 or the negative electrode 17 is disposed on one side. Between the bipolar electrode 14 of the electrode stack 11 sandwiched between the pair of negative electrode termination electrode 18 and positive electrode termination electrode 19 via the separator 13, between the negative electrode termination electrode 18 and the bipolar electrode 14, and the positive electrode termination electrode An electrolyte is injected between 19 and the bipolar electrode 14.

Due to the restraining member 3 via the pair of conductive plates 5 adjacent to the power storage module 4, the distance between the pair of negative electrode termination electrodes 18 and the positive electrode termination electrodes 19 in the electrode stack 11 is between the bipolar electrodes 14, and the negative electrode termination electrode 18 and the bipolar. one surface 15a of the regulating electrode plate 15 of dimensions Z ₀ pressure negative pole of the until terminating electrode 18 when the electrolytic solution is injected into and between the positive end electrode 19 and the bipolar electrode 14 and the electrode 14 And the other surface 15 b of the electrode plate 15 of the positive electrode termination electrode 19.

In the example of FIG. 2, the distance between the pair of negative electrode termination electrode 18 and the positive electrode termination electrode 19 and the prescribed dimension Z ₀ are the same as the other surface 15 b of the electrode plate 15 of the negative electrode termination electrode 18 facing each other and the positive electrode termination electrode 19. The distance between the pair of negative electrode termination electrode 18 and the positive electrode termination electrode 19 and the prescribed dimension Z ₀ are measured by the distance between the one surface 15 a of the electrode plate 15 and the electrode plate 15 of the negative electrode termination electrode 18. It may be measured based on the distance between the surface 15a and the other surface 15b of the electrode plate 15 of the positive electrode termination electrode 19 or the like.

Hereinafter, the manufacturing method of the electrical storage module 4 of this embodiment is demonstrated. As shown in FIG. 3, the distance between the pair of negative electrode termination electrode 18 and positive electrode termination electrode 19 in the electrode stack 11 is between the bipolar electrodes 14, between the negative electrode termination electrode 18 and the bipolar electrode 14, and between the positive electrode termination electrode 19 and the bipolar. The pressure until the specified dimension Z ₀ when the electrolyte is injected between the electrodes 14 is the one surface 15 a of the electrode plate 15 of the negative electrode termination electrode 18 and the other surface of the electrode plate 15 of the positive electrode termination electrode 19. 15b, an electrolyte solution is injected between the bipolar electrodes 14, between the negative electrode termination electrode 18 and the bipolar electrode 14, and between the positive electrode termination electrode 19 and the bipolar electrode 14. The conveyance process of conveying to the liquid injection place 100 is performed. In the transporting process, the distance between the pair of negative electrode termination electrode 18 and positive electrode termination electrode 19 is a dimension Z ₁ that is larger than the prescribed dimension Z ₀ . A liquid injector 50 is installed in the liquid injection place 100.

In the transport process, it is not necessary to apply pressure until the distance between the negative electrode termination electrode 18 and the positive electrode termination electrode 19 reaches the specified dimension Z _0, and thus it is not necessary to attach a heavy restraint plate to the electrode laminate 11. Therefore, conveyance of the electrode laminate 11 in the conveyance step can be performed by human power, a carriage, or the like while fixing the electrode laminate 11 so as not to be separated by an arbitrary clamp or the like.

As shown in FIG. 4, after the conveying step, the pressure until the distance between the pair of negative electrode termination electrodes 18 and the positive electrode termination electrode 19 in the electrode laminate 11 reaches the specified dimension Z ₀ is set to the pair of negative electrode termination electrodes 18 and positive electrodes. A pressurizing step applied to the terminal electrode 19 is performed. In the pressurization step, the pair of negative electrode termination electrode 18 and positive electrode termination electrode are increased by increasing the atmospheric pressure in the chamber 41 with respect to the electrode laminate 11 enclosed in the chamber 41 installed in the injection site 100. Pressure is applied to the pair of negative electrode termination electrode 18 and positive electrode termination electrode 19 until the distance to the predetermined distance Z ₀ is 19. The pressure is applied to one surface 15 a of the electrode plate 15 of the negative electrode termination electrode 18 and the other surface 15 b of the electrode plate 15 of the positive electrode termination electrode 19.

  As shown in FIG. 4, a liquid injection process is performed in which an electrolytic solution is injected between the bipolar electrodes 14, between the negative electrode termination electrode 18 and the bipolar electrode 14, and between the positive electrode termination electrode 19 and the bipolar electrode 14. In the example of FIG. 4, the liquid injector 50 is disposed outside the chamber 41, and the nozzle of the liquid injector 50 is inserted into the liquid inlet parts 21 p and 22 p from the outside of the chamber 41. However, the liquid injector 50 may be disposed inside the chamber 41. Further, the liquid injection process may be performed after the pressurization process or may be performed simultaneously with the pressurization process.

As shown in FIG. 1, after the liquid injection step, necessary sealing is performed, and the restraining member 3 is attached to the power storage module laminate 2 in which a plurality of power storage modules 4 and a plurality of conductive plates 5 are stacked. Due to the restraining member 3, the pressure until the distance between the pair of negative electrode termination electrodes 18 and the positive electrode termination electrode 19 in the electrode laminate 11 reaches the specified dimension Z ₀ is the one surface 15 a of the electrode plate 15 of the negative electrode termination electrode 18 and the positive electrode termination. In addition to the other surface 15b of the electrode plate 15 of the electrode 19, the power storage device 1 is manufactured.

According to the present embodiment, each of a plurality of bipolar electrodes 14 each having a positive electrode 16 or a negative electrode 17 coated with an active material on the electrode plate 15 is laminated via the separator 13, and the positive electrode 16 or the negative electrode 17 is disposed on one side. A pair of negative electrode termination electrode 18 and positive electrode termination electrode 19 sandwiched between separators 13 between bipolar electrodes 14, between negative electrode termination electrode 18 and bipolar electrode 14, and positive electrode termination electrode 19. In the method of manufacturing the electricity storage module 4 in which an electrolyte is injected between the bipolar electrode 14 and the bipolar electrode 14, the electrode stack 11 is transferred to the injection site 100 by the transfer process, and after the transfer process, by the pressurization process, negative terminating electrode 18 and the pressure up to the interval between the pair of the negative electrode terminating electrode 18 and the positive end electrode 19 is defined dimension Z ₀ is a pair of electrode stack 11 In addition to the positive electrode termination electrode 19, an electrolyte solution is injected between the bipolar electrodes 14, between the negative electrode termination electrode 18 and the bipolar electrode 14, and between the positive electrode termination electrode 19 and the bipolar electrode 14 by the liquid injection process. Thereby, conveyance of the electrode laminated body 11 restrained by the heavy restraint board becomes unnecessary, and the handling in manufacture of the electrical storage module 4 becomes easier.

Further, according to the present embodiment, in the pressurizing step, the pressure in the chamber 41 is increased with respect to the electrode stack 11 enclosed in the chamber 41 installed in the liquid injection place 100, thereby since the pressure up to the interval between the negative end electrode 18 and the positive end electrode 19 is defined dimension Z ₀ is added to the pair of the negative electrode terminating electrode 18 and the positive end electrode 19, easily a pair of negative end electrode 18 positive electrode Pressure until the distance from the end electrode 19 reaches the specified dimension Z ₀ can be applied to the pair of negative electrode end electrode 18 and positive electrode end electrode 19.

Hereinafter, a second embodiment of the present invention will be described. As shown in FIG. 5, in the present embodiment, in the pressurizing step, the distance between the pair of negative electrode termination electrodes 18 and the positive electrode termination electrodes 19 is set to the specified dimension Z ₀ by the press machine 42 installed in the liquid injection place 100. The pressure up to is applied to the pair of negative electrode termination electrode 18 and positive electrode termination electrode 19. The pressure is applied to one surface 15 a of the electrode plate 15 of the negative electrode termination electrode 18 and the other surface 15 b of the electrode plate 15 of the positive electrode termination electrode 19.

According to the present embodiment, in the pressurizing step, the pressure until the distance between the pair of negative electrode termination electrodes 18 and the positive electrode termination electrodes 19 reaches the specified dimension Z ₀ by the press machine 42 installed at the injection site 100. Since it is applied to the pair of negative electrode termination electrodes 18 and the positive electrode termination electrode 19, the pressure until the distance between the pair of negative electrode termination electrodes 18 and the positive electrode termination electrode 19 becomes the specified dimension Z ₀ can be easily increased. It can be added to the positive terminal electrode 19.

As mentioned above, although embodiment of this invention was described, this invention is implemented in various forms, without being limited to the said embodiment. For example, in the transport process, the electrode laminate 11 is transported to the liquid injection place 100 in a state where the restraint plate is not attached to the electrode laminate 11, and in the pressurizing process, the pair of negative electrode termination electrodes 18 and the A pressure until the distance from the positive electrode termination electrode 19 reaches the specified dimension Z ₀ may be applied to the pair of the negative electrode termination electrode 18 and the positive electrode termination electrode 19.

DESCRIPTION OF SYMBOLS 1 ... Power storage device, 2 ... Power storage module laminated body, 3 ... Restraining member, 4 ... Power storage module, 5 ... Conductive plate, 5a ... Flow path, 6 ... Positive electrode terminal, 7 ... Negative electrode terminal, 8 ... End plate, 8a ... Insertion Holes, 9 ... Fastening bolts, 10 ... Nuts, 11 ... Electrode laminates, 12 ... Seal members, 13 ... Separator, 14 ... Bipolar electrodes, 15 ... Electrode plate, 15a ... One side, 15b ... Other side, 15c ... Outer edge , 16 ... positive electrode, 17 ... negative electrode, 18 ... negative electrode termination electrode, 19 ... positive electrode termination electrode, 21 ... primary seal, 21a ... first part, 21b ... second part, 21c ... step surface, 21p ... injection port part , 22 ... secondary seal, 22p ... instilling mouth, 41 ... chamber, 42 ... press, 50 ... liquid injection device, 100 ... liquid injection location, F ... film, V ... inner space, Z 0 _... defined dimensions, Z ₁ Dimension.

Claims (3)

Each of a plurality of bipolar electrodes each having an electrode part coated with an active material on an electrode plate is laminated via a separator, and is sandwiched between a pair of terminal electrodes having the electrode part on one side via the separator. A method of manufacturing a power storage module in which an electrolyte is injected between the bipolar electrodes of the laminated body and between the termination electrode and the bipolar electrode,
A transporting process for transporting the laminate to the injection site;
After the transporting step, a pressurizing step of applying a pressure to the pair of termination electrodes until a distance between the pair of termination electrodes in the laminate becomes a specified dimension;
And a liquid injection step of injecting an electrolyte between the bipolar electrodes and between the terminal electrode and the bipolar electrode.   In the pressurizing step, the air pressure in the chamber is increased with respect to the stacked body sealed in the chamber installed in the liquid injection place, whereby the distance between the pair of terminal electrodes is the specified dimension. The manufacturing method of the electrical storage module of Claim 1 which applies the pressure until it becomes to a pair of said termination electrode.   2. The power storage according to claim 1, wherein in the pressurizing step, a pressure is applied to the pair of terminal electrodes until a distance between the pair of terminal electrodes reaches the specified dimension by a press machine installed at the liquid injection site. Module manufacturing method.

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