Method for manufacturing storage module, holding tool, and position correction tool

Abstract

To provide a method for manufacturing a charge module which can prevent nesting and a frame body from interfering with each other when the frame body is arranged in a side surface of a laminate member.SOLUTION: A method for manufacturing a charge module in the present disclosure includes: a preparation step of preparing a laminate member; and a frame body arrangement step of arranging a frame body in a side surface of the laminate member. In the frame body arrangement step, a frame body joining jig and a position correction jig are used.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a manufacturing method for an energy storage module, a holding jig, and a position correction jig. [Background technology]

[0002] In a manufacturing method of a storage module such as a secondary battery, a technique of forming a seal member so as to surround an electrode stack is known. For example, Patent Document 1 discloses a manufacturing device for a storage module including 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. Patent Document 1 also discloses a method of attaching a nesting die having a communication hole forming portion for forming a communication hole to a die, and then forming a resin part by injection molding. For example, FIG. 8 of Patent Document 1 discloses that a second resin seal 24 constituting the resin part has a frame shape partitioned so as to surround each communication hole 24a. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-145032 A Summary of the Invention [Problem to be solved by the invention]

[0004] As disclosed in Patent Document 1, when forming communication holes and resin parts (particularly frame shapes) by injection molding using a nesting mold, there is a problem that it is difficult to design the equipment and mold. Specifically, it is necessary to assemble an insert-type nesting mold while absorbing the variation in thickness of the laminated members, and to precisely position the laminated members and mold to prevent resin leakage, so that the equipment and mold are difficult to design.

[0005] In response to this problem, the present inventors have considered a method of preparing a frame-shaped frame body as a separate member and arranging the frame body on the side surface of the laminated member, instead of forming a frame-shaped resin part by resin molding such as injection molding. The method of arranging the frame body on the side surface of the laminated member does not require the use of a mold, and therefore improves productivity.

[0006] On the other hand, when a method of arranging the frame body on the side surface of the stacking member is adopted, if there is variation in the extension direction of the nest extending outside the stacking member (if there is variation in the height position of the outer end of the nest), a new problem arises in that the nest interferes with the frame body when the frame body is arranged on the side surface of the stacking member. The present disclosure has been made in consideration of the above-mentioned situation, and has as its main object to provide a manufacturing method for an energy storage module that can prevent interference between the nest and the frame body when the frame body is arranged on the side surface of the stacking member. [Means for solving the problem]

[0007] [1] A preparation step of preparing a laminated member; A method for manufacturing an electric storage module, comprising: a frame body disposing step of disposing a frame body on a side surface of the stacked member, the laminated member has an electrode laminate including a plurality of electrodes laminated in a first direction, a seal member surrounding the electrode laminate when viewed from the first direction, and a nest extending from a side surface of the seal member to an outside of the seal member, the frame body arrangement step is a step of joining the sealing member and the frame body with the insert inserted into a first penetration region of the frame body, thereby arranging the frame body on a side surface of the laminated member; The frame arrangement step includes: A jig preparation process for preparing a frame body joining jig having the frame body and a gripping jig that grips the frame body and has a second through-hole region corresponding to the first through-hole region, and preparing a position correction jig having a pair of holding portions and a rod-shaped portion connected to the pair of holding portions; An opposing arrangement process in which an outer end portion of the insert in the laminated member and the frame in the frame joining jig are arranged to face each other with a space provided; a position adjustment process in which the holding portion and the rod-shaped portion of the position correction jig are inserted from the second through-area side toward the first through-area side of the frame body joining jig, and the pair of holding portions sandwich and fix the nest from the first direction, thereby adjusting the height position of the outer end portion of the nest; a joining process in which the frame body joining jig is moved toward the stacked member while the nest is fixed by the pair of holding portions, and the sealing member and the frame body are joined; A method for manufacturing an electricity storage module having the above structure.

[0008] [2] the stacked member has a block member arranged at a position overlapping with the seal member and the insert when viewed from the first direction, The method for manufacturing an energy storage module according to [1], wherein in the joining step, the sealing member and the block member are joined to the frame body.

[0009] [3] the electrode stack includes a bipolar electrode having a positive electrode layer disposed on one surface of a current collector and a negative electrode layer disposed on the other surface of the current collector; The electrode stack includes a plurality of the bipolar electrodes in the first direction, The method for manufacturing an electricity storage module according to [1] or [2], wherein a separator is disposed between each of the plurality of bipolar electrodes adjacent to each other.

[0010] [4] A holding jig used in the method for producing an energy storage module according to any one of [1] to [3], the holding jig having the second penetrating region.

[0011] [5] A position correction jig for use in the method for manufacturing an energy storage module according to any one of [1] to [3], the position correction jig having the pair of holding portions and the rod-shaped portion. Effect of the Invention

[0012] The method of manufacturing an energy storage module according to the present disclosure has the effect of preventing interference between the insert and the frame body when the frame body is disposed on a side surface of a stack member. [Brief description of the drawings]

[0013] [Figure 1] 2A to 2C are schematic diagrams illustrating examples of laminated members and a frame body according to the present disclosure. [Diagram 2] 1A to 1C are schematic diagrams illustrating a frame body joining jig and a position correction jig in the present disclosure. [Diagram 3] 11 is a schematic side view illustrating a frame body arrangement step in the present disclosure. FIG. [Figure 4] FIG. 2 is a schematic diagram illustrating a gripping jig in the present disclosure. [Diagram 5] 1A to 1C are schematic cross-sectional views illustrating a method for forming a laminate member in the present disclosure. [Figure 6] 1A to 1C are schematic diagrams illustrating a position correction jig according to the present disclosure. [Figure 7] 1A to 1C are schematic diagrams illustrating a position correction jig according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. Each of the drawings shown below is a schematic illustration, and the size and shape of each part are appropriately exaggerated to facilitate understanding. In addition, in this specification, when expressing an aspect in which another member is arranged relative to a certain member, the term "above" or "below" is used, unless otherwise specified, it includes both a case in which another member is arranged directly above or below a certain member so as to be in contact with the certain member, and a case in which another member is arranged above or below a certain member via another member.

[0015] A. Manufacturing method of energy storage module FIG. 1(a) is a schematic cross-sectional view illustrating a laminated member in the present disclosure (the laminated member before a frame body is placed), FIG. 1(b) is a schematic cross-sectional view illustrating a laminated member in the present disclosure (the laminated member after a frame body is placed), and FIG. 1(c) is a schematic oblique view illustrating a frame body in the present disclosure.

[0016] As shown in FIG. 1(a), in the present disclosure, first, a laminated member 10 is prepared (preparation step). The laminated member 10 is oriented in a first direction D 1 An electrode laminate α including a plurality of electrodes (BP1, BP2) laminated in a first direction D 1 1(b), a frame 20 is placed on the side SS of the laminated member 10 (side SS of the seal member β) (frame placement step). As shown in FIGS. 1(b) and 1(c), in the frame placement step, the seal member β and the frame 20 are placed on the side SS of the laminated member 10 so that the first penetration region P 1 By joining the laminated members 10 with the insert γ inserted therein, the frame 20 is disposed on the side surface SS of the laminated members 10 (the side surface SS of the seal member β).

[0017] The frame body arrangement process in the present disclosure specifically includes a jig preparation process, an opposing arrangement process, a position adjustment process, and a joining process.

[0018] In the jig preparation step, a frame body joining jig and a position correction jig are prepared. Here, Fig. 2(a) is a schematic perspective view illustrating a frame body joining jig in the present disclosure, Fig. 2(b) is a schematic side view of the frame body joining jig shown in Fig. 2(a) seen from the xz plane, Fig. 2(c) is a schematic cross-sectional view of the frame body joining jig shown in Fig. 2(a) cut in the xz plane, and Fig. 2(d) is a schematic side view illustrating a position correction jig in the present disclosure. Also, Fig. 3 is a schematic side view illustrating a frame body arrangement step in the present disclosure.

[0019] As shown in Fig. 2(a) to (c), the frame body joining jig J has a frame body 20 and a gripping jig 30 for gripping the frame body 20. The frame body 20 has a first penetration region P 1 The holding jig 30 has a second penetration region P 2 The first penetration region P 1 and the second penetration area P 2 2(d), the position correcting jig 40 has a pair of holding portions 41 (41a, 41b) and a rod-shaped portion 42 connected to the pair of holding portions 41.

[0020] Next, as shown in FIG. 3(a), the outer end t2 of the insert γ in the laminated member 10 and the frame body 20 in the frame body joining jig J are arranged to face each other with a space therebetween (facing arrangement step). Next, as shown in FIG. 3(b), the holding portion 41 and the rod-shaped portion 42 in the position correction jig 40 are moved in the first direction D. 1 The second direction D perpendicular to 2 Along the second penetration area P in the frame joining jig J 2 First penetration area P from the side 1 Further, the pair of holding parts 41 (41a, 41b) holds the 1 The insert γ is sandwiched and fixed from above and below, thereby adjusting the height position of the outer end of the insert γ (the end on the right side in the drawing) (position adjustment process).

[0021] Next, as shown in FIG. 3(c), while the insert γ is fixed by the pair of holding parts 41, the frame body joining jig J is moved in the second direction D 2 3(d), the pair of holding parts 41 are released from the nest γ, and the pair of holding parts 41 are separated from the nest γ. Then, although not shown in the figure, the holding jig is peeled off from the frame joining jig joined to the seal member.

[0022] According to the present disclosure, by using a frame body joining jig and a position correction jig, it is possible to prevent interference between the nest and the frame body when placing the frame body on the side surface of the laminated member. As described above, when adopting a method of placing the frame body on the side surface of the laminated member, if there is variation in the extension direction of the nest extending outside the laminated member (if there is variation in the height position of the outer end of the nest), the nest is likely to interfere with the frame body (and the gripping jig) when placing the frame body on the side surface of the laminated member. In contrast, in the present disclosure, the position correction jig is used to correct the variation in the height position of the outer end of the nest. Furthermore, since the seal member and the frame body are joined using a frame body joining jig while the height position of the outer end of the nest is fixed by the position correction jig, the frame body can be placed on the side surface of the laminated member with high accuracy while preventing interference between the nest and the frame body (and the gripping jig).

[0023] Furthermore, the frame body joining jig has a gripping jig for gripping the frame body. This makes it possible to suppress deformation of the frame body due to thermal strain when joining the seal member and the frame body, for example, by thermal welding. In addition, in the present disclosure, a frame-shaped resin part is not formed by resin molding such as injection molding, but a frame body having a frame shape is prepared as a separate member, and the frame body is placed on the side of the laminated member. Unlike conventional resin molding, there is no need to use a mold, which has the advantage of improving productivity.

[0024] 1. Preparation process The preparation step in the present disclosure is a step of preparing a laminated member (laminate member preparation step). The laminated member has an electrode laminate including a plurality of electrodes laminated in a first direction, a sealing member surrounding the electrode laminate when viewed from the first direction, and a nest extending from a side surface of the sealing member to the outside of the sealing member.

[0025] (1) Electrode laminate The electrode stack according to the present disclosure includes a plurality of electrodes stacked in a first direction. The electrodes each have a current collector and an electrode layer (a positive electrode layer or a negative electrode layer) disposed on at least one surface of the current collector.

[0026] The electrode stack includes a power generation unit. The power generation unit includes a positive electrode layer, a negative electrode layer, and a separator disposed between the positive electrode layer and the negative electrode layer. 1 The power generation unit U has a positive electrode layer 2, a negative electrode layer 3, and a separator 4 disposed between the positive electrode layer 2 and the negative electrode layer 3. 1 In the above, the positive electrode layer 2 and the negative electrode layer 3 are each collected by the adjacent current collector 1. In addition, an electrolyte is supplied to the positive electrode layer 2, the negative electrode layer 3, and the separator 4 in a step subsequent to the joining step. As a result, the positive electrode layer 2, the negative electrode layer 3, and the separator 4 are each impregnated with the electrolyte.

[0027] The electrode stack may have a plurality of power generation units stacked in a first direction (thickness direction). The electrode stack α in FIG. 1(a) has a plurality of power generation units (U 1 , U 2 , U 3 As shown in FIG. 1(a), the plurality of power generating units may be connected in series to each other. Although not particularly shown, the plurality of power generating units may be connected in parallel to each other.

[0028] The multiple power generation units are independent of each other so that the electrolyte does not flow between them. 1 ~U 3 are independent of each other so that the electrolyte does not flow between them. For example, 1 and generation unit U 2 are partitioned by the current collector 1 and the seal member β and are independent from each other.

[0029] One power generating unit may be configured using two bipolar electrodes. In FIG. 1(a), the electrode stack α is aligned in a first direction D 1 In the bipolar electrode BP 1 and bipolar electrode BP 2 Adjacent bipolar electrodes BP 1 and bipolar electrode BP 2A separator 4 is disposed between the power generating unit U 2 is the bipolar electrode BP 2 The positive electrode layer 2b and the bipolar electrode BP 1 and a separator 4 disposed between the positive electrode layer 2b and the negative electrode layer 3a. In this manner, the electrode stack in the present disclosure may include a plurality of bipolar electrodes in the first direction, and a separator may be disposed between each of the plurality of bipolar electrodes adjacent to each other.

[0030] (2) Sealing material The sealing member in the present disclosure is disposed so as to surround the electrode laminate when viewed from the first direction. For example, in FIG. 1(a), the sealing member β is disposed along the outer edge of the current collector 1. When the laminate member 10 is viewed from the thickness direction, the sealing member β is a member that prevents leakage of the electrolyte, and is usually disposed around the entire outer edge of the current collector 1. The sealing member is, for example, a resin member. Examples of resins used for the resin member include thermoplastic resins such as polypropylene, polyethylene, and polyethylene terephthalate.

[0031] (3) Nesting The insert in the present disclosure is disposed so as to extend from the side surface of the sealing member to the outside of the sealing member. The side surface of the sealing member refers to a surface extending in a first direction. The insert is a member for forming a through hole penetrating the inside and outside of the laminated member. As shown in FIG. 1(a), the insert γ has an inner end t1 located inside the laminated member 10 and an outer end t2 protruding outward from the side surface SS of the laminated member 10 (sealing member β). The insert γ is disposed so as to extend in the first direction D. 1 The sealing member β is sandwiched between the upper and lower sealing members β and held in place.

[0032] The material of the insert may be, for example, metal. The thickness of the insert is not particularly limited, but is, for example, 0.1 mm or more and 0.4 mm or less. The shape of the insert in plan view (shape seen from the thickness direction) is, for example, a rectangle.

[0033] (4) Laminated materials The laminated member in the present disclosure includes the electrode laminate, the sealing member, and the insert, as described above. The laminated member may include a block member. As shown in FIG. 3(a), 1 From the perspective of block member δ(δ 1 , δ 2 ) are arranged at positions overlapping the seal member β and the insert γ, respectively. Also, as shown in FIG. 3(a), the block member δ (δ 1 , δ 2 ) may be disposed on both sides of the laminated member 10. As shown in FIG. 3(c), the block member δ is joined to the frame 20 in the joining step. By providing the block member δ, 1 This improves the airtightness at the end portion of the laminated member 10 in the laminated member 10.

[0034] For example, when the pressure is reduced to inject an electrolyte solution, the end of the laminated member in the first direction is likely to lack airtightness. In response to this, the provision of a block member improves the airtightness of the end of the laminated member in the first direction. The block member is, for example, a resin member. Examples of resins used for the resin member include thermoplastic resins such as polypropylene, polyethylene, and polyethylene terephthalate. In addition, the block member and the seal member are preferably joined together, and more preferably welded together.

[0035] 5 is a schematic cross-sectional view (exploded view) illustrating a method for forming a laminated member according to the present disclosure. As shown in FIG. 5, a bipolar electrode BP 1 and bipolar electrode BP 2 Prepare the bipolar electrode BP. 1 has a positive electrode layer 2a disposed on one surface of a current collector 1a, and a negative electrode layer 3a disposed on the other surface of the current collector 1a.

[0036] In addition, the bipolar electrode BP 1 The bipolar electrode BP has a frame member 51a arranged along the outer edge of the current collector 1a. 1When viewed from the thickness direction, the frame member 51a is usually arranged along the entire outer periphery of the current collector 1a. For example, when the outer periphery of the current collector 1a is rectangular, the frame member 51a is arranged along the entire outer periphery of the rectangle. As shown in Fig. 5, the frame member 51a preferably covers a part of one main surface p of the current collector 1a, a part of the other main surface q of the current collector 1a, and the entire side surface r that constitutes the outer periphery of the current collector 1a.

[0037] As shown in Figure 5, the bipolar electrode BP 2 The bipolar electrode BP has a positive electrode layer 2b disposed on one surface of the current collector 1b and a negative electrode layer 3b disposed on the other surface of the current collector 1b. 2 The bipolar electrode BP has a frame member 51b arranged along the outer edge of the current collector 1b. 2 For details, see the bipolar electrode BP 1 The details are the same as those in

[0038] As shown in Figure 5, the bipolar electrode BP 1 The negative electrode layer 3a and the bipolar electrode BP 2 The positive electrode layer 2b in the positive electrode layer 2a faces the positive electrode layer 2b in the positive electrode layer 2a through a separator 4. As shown in FIG. 1 The frame member 51a and the bipolar electrode BP 2 Between the frame member 51b in the above, an insert γ and a frame member (spacer) 51c are disposed.

[0039] As shown in Figure 5, the bipolar electrode BP 1 , bipolar electrode BP 2, the separator 4 and the insert γ are arranged, and then the frame members 51a, 51b and 51c are welded. As a result, a power generating unit having the positive electrode layer 2b, the negative electrode layer 3a and the separator 4 is formed. Also, by welding the frame members 51a, 51b and 51c, the seal member β illustrated in FIG. 1(a) is formed. Also, after welding the frame members 51a, 51b and 51c, a resin layer may be formed, for example, by injection molding. In that case, the seal member β has a layer in which the multiple frame members 51a, 51b and 51c are welded, and a resin layer arranged on the outside of the layer. On the other hand, the seal member in the laminated member may be in a state in which the multiple frame members are not welded. In a joining process described later, the frame body may be welded to the seal member while welding the multiple frame members.

[0040] 2. Frame arrangement process The frame body arrangement step in the present disclosure is a step of arranging a frame body on the side surface of the laminated member. As shown in FIG. 1(c), in the frame body arrangement step, the seal member β and the frame body 20 are arranged so that the first penetration region P 1 As shown in FIG. 1(c), the outer end t2 of the nest γ is aligned in the second direction D 2 In FIG. 1(c), one frame 20 is disposed on the side surface of the seal member β, but in the third direction D 3 (3rd direction D 3 is the first direction D 1 and the second direction D 2 A plurality of frame bodies 20 may be arranged along the direction perpendicular to the axis of the frame body 20. The frame body arrangement step includes a jig preparation step, a facing arrangement step, a position adjustment step, and a joining step.

[0041] (1) Jig preparation process The jig preparation process in the present disclosure is a process of preparing a frame body joining jig and a position correction jig.

[0042] (i) Frame joining jig The frame body joining jig in the present disclosure has a frame body and a gripping jig that grips the frame body.

[0043] As shown in FIGS. 2(a) to 2(c), the frame body 20 has a first penetration region P 1 The first penetration region P 1 is a region into which a position correction jig is inserted in a position adjustment process described later. 1 is a region into which a nest is inserted in a joining step described later. The surface of the frame 20 opposite the holding jig 30 (the left surface in Figs. 2(b) and 2(c)) is joined to a surface of the seal member.

[0044] As shown in FIGS. 2(a) to 2(c), the frame body 20 has a plurality of first penetration regions P 1 The first penetrating region P may have a plurality of first penetrating regions P. 1 are provided independently of each other and correspond to the respective power generating units. As shown in FIG. 2(a), the first penetration region P 1 Let the height (length in the height direction z) be H 1 The first penetration area P 1 The width (length in the width direction y) of 1 Let the height H 1 is usually set to a width W according to the shape of the insert (not shown). 1 3B and 3C, the pair of holding portions 41 (41a, 41b) of the position correction jig 40 are in a state where the insert γ is sandwiched between the pair of holding portions 41 (41a, 41b) of the position correction jig 40 in the joining process. 1 Therefore, the first penetration area P 1 The size of is set taking this into consideration.

[0045] The frame is, for example, a resin member. Examples of the resin include thermoplastic resins such as polypropylene, polyethylene, and polyethylene terephthalate. The outer edge shape of the frame (as viewed from the depth direction x) is not particularly limited, but may be, for example, a quadrangle such as a rectangle.

[0046] As shown in Fig. 2(a) to (c), the gripping jig 30 grips the frame body 20. The gripping jig 30 also has a second penetration region P 2 The second penetration region P 2 is a region into which a position correction jig is inserted in a position adjustment process described later. 1 and the second penetration area P 2 are connected in the depth direction x.

[0047] As shown in FIGS. 2(a) to 2(c), the holding jig 30 has a plurality of second penetration regions P 2 The second penetrating regions P may have a plurality of 2 are provided independently of each other, and each first penetration region P 1 3(b) and (c), the pair of holding portions 41 (41a, 41b) of the position correction jig 40 are provided in a state where the insert γ is sandwiched between the pair of holding portions 41 (41a, 41b) of the position correction jig 40 and the second through-hole region P 2 Therefore, the second penetration area P 2 The size of is set taking this into consideration.

[0048] As shown in Figs. 2(b) and (c), the gripping jig 30 may have a groove 31 into which a part of the frame body 20 is fitted. A part of the frame body 20 is inserted into the groove 31 of the gripping jig 30 in the depth direction x, and the frame body 20 is gripped by the gripping jig 30. The groove 31 in Figs. 2(b) and (c) is arranged to cover a part of the first main surface s1 of the frame body 20, a part of the second main surface s2 of the frame body 20, and the entire end surface s3 connecting the first main surface s1 and the second main surface s2, and grips the frame body 20. Although not particularly shown, the gripping jig may not have a groove into which the frame body is fitted. In this case, for example, it is preferable that the end surface of the frame body and the end surface of the gripping jig are bonded or welded to each other.

[0049] Fig. 4(a) is a schematic perspective view illustrating a gripping jig in the present disclosure, and Fig. 4(b) is a schematic cross-sectional view of the gripping jig shown in Fig. 4(a) cut along the xz plane. As shown in Figs. 4(a) and (b), the gripping jig 30 may have a connecting member 35 on the surface opposite to the surface on which the frame (not shown) is disposed. The gripping jig 30 and the moving device are connected by, for example, bolting using the connecting member 35. The moving device is moved in, for example, the second direction D 2 By moving the frame body joining jig including the gripping jig 30 along the second direction D 2 The gripping jig 30 moves along the second penetration region P 2 The connecting member 35 has a third through region P 3 The second penetration region P 2 and the third penetration area P 3 are communicated in the depth direction x. Although not particularly shown, in the frame body joining jig, the first through region, the second through region and the third through region usually communicate in the depth direction x.

[0050] The gripping jig is a metal member such as stainless steel or aluminum. The outer edge shape of the gripping jig (outer edge shape viewed from the depth direction x) is not particularly limited, but may be, for example, a quadrangle such as a rectangle. In addition, as shown in FIG. 2(a), when viewed from the depth direction x, it is preferable that the outer edge of the gripping jig 30 is located outside the outer edge of the frame body 20. This is because, when the seal member and the frame body are joined by, for example, thermal welding, deformation of the frame body due to thermal strain can be effectively suppressed.

[0051] (ii) Position correction jig The position correction jig in the present disclosure has a pair of holding parts and a rod-shaped part connected to the pair of holding parts. As shown in FIG. 2(d), the position correction jig 40 has a pair of holding parts 41 (41a, 41b) and a rod-shaped part 42 connected to the pair of holding parts 41. The pair of holding parts 41 (41a, 41b) sandwich and fix the nest from the height direction z (up and down direction) in a position adjustment process described later. The rod-shaped part 42 extends in one direction, and in the position adjustment process described later, is aligned with the frame body joining jig in the depth direction x in FIGS. 2(a) to (c) (second direction D in FIG. 3). 2 3(a), the position correction jig 40 is moved along the second direction D 2 The guide member 50 may be attached to guide the movement of the actuator 50 in the actuator.

[0052] The position correction jig in the present disclosure is not particularly limited as long as it can be inserted into the frame joining jig and can be fixed by sandwiching the nest. A specific example of the position correction jig will be described with reference to FIG. 6. Here, FIG. 6(a) is a schematic plan view illustrating a pair of holding parts and their vicinity in the position correction jig, and FIG. 6(b) is a schematic side view of the pair of holding parts in FIG. 6(a) as seen from the depth direction x. Also, FIGS. 6(c) and (d) are schematic side views of the pair of holding parts in FIG. 6(a) as seen from the width direction y, and FIGS. 6(e) to (h) are schematic side views of each holding part in FIG. 6(a) as seen from the width direction y.

[0053] As shown in Fig. 6(a) to (d), the pair of holding parts 41a, 41b are parts for sandwiching and fixing the nest from the height direction z (up-down direction). As shown in Fig. 6(a) and (b), the pair of holding parts 41a, 41b have flat surfaces for sandwiching and fixing the nest. Furthermore, the holding parts 41a, 41b each have a connecting part 44a, 44b for connecting to a rod-shaped part (not shown). A shaft part 43 for rotating and moving the holding parts 41a, 41b is disposed between the holding part 41a and the connecting part 44a, and between the holding part 41b and the connecting part 44b.

[0054] 6(c) and (d), the tips ta, tb of the holders 41a and 41b rotate in the height direction z (up and down direction) around the shaft 43. Specifically, when the position correction jig clamps the nest, the tip ta of the holder 41a rotates toward the +z side, and the tip tb of the holder 41b rotates toward the -z side. In addition, when the position correction jig fixes the nest, the tip ta that has moved toward the +z side rotates toward the -z side, and the tip tb that has moved toward the -z side rotates toward the +z side.

[0055] As shown in Fig. 6(e) and (f), the connecting portion 44a is connected to the rod-shaped portion 42 via, for example, a joint link 45a. As shown in Fig. 6(e), an axis passing through the center of the shaft portion 43 and parallel to the depth direction x is denoted as AX 1 Let the axis AX 1 With respect to the reference point, the connecting portion 44a and the joint link 45a are connected on the -z side, and the joint link 45a and the rod-shaped portion 42 are connected on the +z side. When the rod-shaped portion 42 is moved to the left side of the drawing as shown in Fig. 6(e) with the connecting portion 44a and the joint link 45a connected on the +z side, as shown in Fig. 6(f), the tip ta of the holding portion 41a rotates and moves on the +z side around the shaft portion 43 as the center, as shown in Fig. 6(f). Conversely, when the rod-shaped portion 42 shown in Fig. 6(f) is moved to the right side of the drawing, the tip ta of the holding portion 41a rotates and moves on the -z side around the shaft portion 43.

[0056] As shown in Figures 6(g) and (h), the connecting portion 44b is connected to the rod-shaped portion 42 via, for example, a joint link 45b. As shown in Figure 6(g), an axis that passes through the center of the shaft portion 43 and is parallel to the depth direction x is denoted as AX 2 Let the axis AX 2 With respect to the reference point, the connecting portion 44b and the joint link 45b are connected on the +z side, and the joint link 45b and the rod-shaped portion 42 are connected on the -z side. When the rod-shaped portion 42 is moved to the left side of the drawing as shown in Fig. 6(g) with the connecting portions connected in this manner, the tip tb of the holding portion 41b rotates and moves on the -z side around the shaft portion 43 as shown in Fig. 6(h). Conversely, when the rod-shaped portion 42 shown in Fig. 6(h) is moved to the right side of the drawing, the tip tb of the holding portion 41b rotates and moves on the +z side around the shaft portion 43.

[0057] In this way, when the rod-shaped portion 42 is moved to the left side in Figures 6(e) and (g), the holding portions 41a and 41b are opened as shown in Figures 6(f) and (h). Conversely, when the rod-shaped portion 42 is moved to the right side in Figures 6(f) and (h), the holding portions 41a and 41b are closed as shown in Figures 6(e) and (g). This makes it possible for the holding portions 41a and 41b to fix the nesting member and for the holding portions 41a and 41b to release the fixation of the nesting member.

[0058] As shown in FIG. 7(a), in a side view of the xz plane in the depth direction x and the height direction z, a plurality of position correction jigs 40 (40X, 40Y, 40Z) may be arranged along the height direction z. In this case, as shown in FIG. 7(b), in a side view of the yz plane in the width direction y and the height direction z, adjacent position correction jigs 40 may be arranged in a staggered manner. In FIG. 7(b), the position correction jig 40Y is arranged on the +y side of the position correction jig 40X, and the position correction jig 40Z is arranged on the -y side of the position correction jig 40Y. By adopting such a staggered arrangement, when a pair of holding parts 41a, 41b of the position correction jigs 40X, 40Y, 40Z are in an open state as shown in FIG. 7(c), it is possible to prevent the adjacent position correction jigs 40 from interfering with each other.

[0059] (2) Opposing arrangement process The opposing arrangement step in the present disclosure is a step of arranging an outer end portion of the insert in the laminated member and the frame in the frame joining jig so as to face each other with a space therebetween.

[0060] 3(a), an outer end t2 of the insert γ in the laminated member 10 and the frame body 20 in the frame body joining jig J are arranged to face each other with a space provided. Furthermore, in the joining step described below, when the sealing member and the frame body are joined by thermal welding, it is preferable to heat at least one of the sealing member and the frame body immediately before the facing arrangement step.

[0061] (3) Position adjustment process The position adjustment process in the present disclosure is a process of inserting the holding portion and the rod-shaped portion of the position correction jig from the second penetrating region side toward the first penetrating region side of the frame body joining jig, clamping and fixing the nest from the first direction with the pair of holding portions, and adjusting the height position of the nest.

[0062] As shown in FIG. 3B, the holding portion 41 and the rod-shaped portion 42 of the position correction jig 40 are inserted into the second penetration region P of the frame joining jig J. 2 First penetration area P from the side 1 In FIG. 3(b), the holding portion 41 protrudes from the end portion of the frame body joining jig J on the frame body 20 side (the end portion on the left side in the figure). Then, the pair of holding portions 41 (41a, 41b) are inserted in the first direction D 1 The nest γ is sandwiched and fixed from the outside. This allows any variation in the height position of the outer end of the nest γ to be corrected. The outer end of the nest γ corresponds to the outer end t2 illustrated in FIG. 3(a).

[0063] (4)Joining process The joining step in the present disclosure is a step of moving the frame joining jig toward the laminated member while fixing the nest with the pair of holding parts, and joining the seal member and the frame. As shown in Fig. 3(c), while fixing the nest γ with the pair of holding parts 41, the frame joining jig J is moved toward the laminated member 10 along the extending direction of the rod-shaped part 42. Thereafter, the seal member β and the frame body 20 are joined by bringing the surface of the seal member β on the frame body 20 side into surface contact with the surface of the seal member β on the frame body 20 side.

[0064] The method of joining the sealing member and the frame body is not particularly limited. For example, when the sealing member and the frame body are made of resin, at least one of the sealing member and the frame body may be heated to weld the two together. Examples of the heating method include a method of irradiating with an infrared lamp, a method of blowing hot air, and a method of pressing a hot plate. In addition, a method of joining the sealing member and the frame body may be a method of placing an adhesive layer between the two. Also, as shown in FIG. 3(c), when the laminated member 10 is joined to the block member δ (δ 1 , δ 2 ), it is preferable to join the seal member β and the block member δ to the frame 20 in the joining step.

[0065] As shown in Fig. 3(d), after the joining step, it is preferable to release the nest γ from the pair of holding parts 41 and separate the pair of holding parts 41 from the nest γ. In addition, although not particularly shown, it is preferable to peel the gripping jig from the frame joining jig joined to the seal member. Note that in the present disclosure, it is not necessary to peel the gripping jig from the frame joining jig joined to the seal member.

[0066] 3.Other processes The method for manufacturing an energy storage module according to the present disclosure may include, after the frame body arrangement step, a through hole forming step of forming the through hole by removing the insert γ from the stacked members. The through hole is formed by removing the insert γ from the stacked members.

[0067] The method for producing an electric storage module according to the present disclosure may include, after the through-hole forming step, a step of supplying an electrolyte solution to the inside of the laminated member through the through-hole. The method for supplying the electrolyte solution is not particularly limited, and a known method may be used.

[0068] The method for producing an electricity storage module according to the present disclosure may include a sealing step of sealing the through-hole after the electrolyte supplying step. The method for sealing the through-hole is not particularly limited, and may include, for example, a method of sealing the through-hole by heating and melting a seal member.

[0069] 4. Energy storage module Specific examples of the power storage module in the present disclosure include secondary batteries (e.g., lithium ion secondary batteries) and electric double layer capacitors. In addition, applications of the power storage module include, for example, power sources for vehicles such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), electric vehicles (BEVs), gasoline automobiles, and diesel automobiles. In particular, it is preferable to use the power storage module as a driving power source for hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), or electric vehicles (BEVs). In addition, the power storage module in the present disclosure may be used as a power source for moving bodies other than vehicles (e.g., railways, ships, and aircraft), and may be used as a power source for electrical products such as information processing devices.

[0070] B. Gripping jig The gripping jig in the present disclosure is used in the manufacturing method of the energy storage module described above, and has the second penetration region. The gripping jig is similar to the content described in "A. Manufacturing method of the energy storage module" above, so a description thereof will be omitted here. The present disclosure can also provide a frame body joining jig that is used in the manufacturing method of the energy storage module described above, and has the frame body and the gripping jig.

[0071] C. Position correction jig The position correction jig in the present disclosure is used in the manufacturing method of the power storage module described above, and has the pair of holding parts and the rod-shaped part. The position correction jig is similar to the content described in "A. Manufacturing method of the power storage module" above, and therefore will not be described here.

[0072] The present disclosure is not limited to the above-described embodiments. The above-described embodiments are merely examples, and anything that has substantially the same configuration as the technical idea described in the claims of the present disclosure and exhibits similar effects is included in the technical scope of the present disclosure. [Explanation of symbols]

[0073] 1...Current collector 2…Positive electrode layer 3...Negative electrode layer 4…Separator 10...Laminated material 20...Frame 30...Gripping jig 40... Position correction jig

Claims

1. A preparation step of preparing a laminated member; A method for manufacturing an electric storage module, comprising: a frame body disposing step of disposing a frame body on a side surface of the stacked member, the laminated member has an electrode laminate including a plurality of electrodes laminated in a first direction, a seal member surrounding the electrode laminate when viewed from the first direction, and a nest extending from a side surface of the seal member to an outside of the seal member, the frame body disposing step is a step of disposing the frame body on a side surface of the laminated member by joining the sealing member and the frame body with the insert inserted into a first penetration region of the frame body; The frame body arrangement step includes: A jig preparation process for preparing a frame body joining jig having the frame body and a gripping jig that grips the frame body and has a second through-hole region corresponding to the first through-hole region, and preparing a position correction jig having a pair of holding portions and a rod-shaped portion connected to the pair of holding portions; An opposing arrangement process in which an outer end portion of the insert in the laminated member and the frame in the frame body joining jig are arranged to face each other with a space provided; a position adjustment process in which the holding portion and the rod-shaped portion of the position correction jig are inserted from the second through-area side toward the first through-area side of the frame body joining jig, and the pair of holding portions sandwich and fix the nest from the first direction, thereby adjusting the height position of the outer end portion of the nest; a joining process in which the frame body joining jig is moved toward the stacked members while the nest is fixed by the pair of holding portions, and the sealing member and the frame body are joined; A method for manufacturing an electricity storage module having the above structure.

2. the stacked member includes a block member disposed at a position overlapping the seal member and the insert when viewed from the first direction, The method for manufacturing an electric storage module according to claim 1 , wherein in the joining step, the sealing member and the block member are joined to the frame body.

3. the electrode stack includes a bipolar electrode having a positive electrode layer disposed on one surface of a current collector and a negative electrode layer disposed on the other surface of the current collector; The electrode stack includes a plurality of the bipolar electrodes in the first direction, The method for manufacturing an electric storage module according to claim 1 , wherein a separator is disposed between each of the adjacent bipolar electrodes in the plurality of bipolar electrodes.

4. A holding jig used in the method for producing an electric storage module according to claim 1 , the holding jig having the second penetration region.

5. A position correction jig used in the method for manufacturing an electric storage module according to claim 1 , the position correction jig having the pair of holding portions and the rod-shaped portion.

Images