Storage battery and method for manufacturing storage battery

Abstract

The invention relates to a storage battery and a method for manufacturing the storage battery. The storage battery includes: a battery module including a plurality of battery cells; a battery case accommodating the battery module; and a coupling member disposed within the battery case. The battery case is formed in a rectangular parallelepiped shape. The battery module has a facing corner facing the three-dimensional corner of the battery case. The coupling member includes a corner coupling portion that couples a three-dimensional corner of the battery case to the facing corner.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This nonprovisional application is based on Japanese Patent Application No. 2024-042039 filed with the Japan Patent Office on March 18, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to an electric storage battery and a method for manufacturing an electric storage battery. Background Art

[0004] For example, Japanese National Patent Publication No. 2023-509216 discloses a battery including a plurality of electrode body groups and a case accommodating the plurality of electrode body groups. The plurality of electrode body groups are connected in series with each other via a first connecting member. Summary of the Invention

[0005] In the battery described in Japanese National Patent Publication No. 2023-509216, the electrode body group may be relatively displaced with respect to the case due to vibration or the like.

[0006] An object of the present disclosure is to provide a storage battery capable of suppressing relative displacement of a battery module with respect to a battery case and a method of manufacturing the storage battery.

[0007] According to one aspect of the present disclosure, a storage battery includes: a battery module, which includes a plurality of battery cells; a battery case, which accommodates the battery module; and a coupling member, which is arranged in the battery case, wherein the battery case is formed in a rectangular parallelepiped shape, the battery module has a facing corner facing the three-dimensional corner of the battery case, and the coupling member includes a corner coupling portion, which couples the three-dimensional corner of the battery case to the facing corner.

[0008] According to one aspect of the present disclosure, a method for manufacturing a storage battery is a method for manufacturing the above-mentioned storage battery, the method comprising: an insertion step of inserting a battery module into a battery housing; and a supply step of supplying a bonding material for forming a bonding member into the battery housing, wherein, in the supply step, a supply tool is used, the supply tool having a receiving portion and a discharge portion, wherein the receiving portion is capable of receiving the bonding material, and the discharge portion is connected to the receiving portion to discharge the bonding material, and the bonding material is supplied to the three-dimensional corner of the battery housing by inserting the discharge portion between the corner of the battery housing and the battery module.

[0009] The foregoing and other objects, features, aspects and advantages of the present disclosure will become more apparent from the following detailed description of the present disclosure when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a perspective view schematically showing a storage battery according to one embodiment of the present disclosure.

[0011] Figure 2 yes Figure 1 An exploded perspective view of the storage battery shown.

[0012] Figure 3 This is a plan view of a storage battery.

[0013] Figure 4 It is along Figure 3 A cross-sectional view taken along line IV-IV in FIG.

[0014] Figure 5 It is along Figure 3 A cross-sectional view taken along line VV in FIG.

[0015] Figure 6 is a cross-sectional view schematically showing a step of supplying a bonding material into a battery case.

[0016] Figure 7 is a cross-sectional view schematically showing a step of supplying a bonding material into a battery case.

[0017] Figure 8 is a cross-sectional view schematically showing variations of the corner joint and the intermediate joint.

[0018] Figure 9 is a cross-sectional view schematically showing a modification of the upper joining portion and the lower joining portion. DETAILED DESCRIPTION

[0019] The embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be noted that in the drawings referred to below, the same or corresponding components will be denoted by the same reference numerals.

[0020] Figure 1 is a perspective view schematically showing a storage battery according to one embodiment of the present disclosure. Figure 2 yes Figure 1 An exploded perspective view of the storage battery shown. Figure 3 This is a plan view of a storage battery. Figure 4 It is along Figure 3 A cross-sectional view taken along line IV-IV in FIG. Figure 5 It is along Figure 3 The storage battery 1 is mounted on the bottom of a vehicle, for example.

[0021] like Figures 1 to 5 As shown, the storage battery 1 includes a battery module 10 (see Figure 2), battery case 300, external terminal 400 and coupling member 500. It should be noted that Figure 2 The coupling member 500 is omitted.

[0022] The battery module 10 includes a plurality of battery cells 100. In this embodiment, the battery module 10 has a plurality of battery cells 100 and a cover sheet 200. It should be noted that Figure 3 The cover sheet 200 is omitted in the figure.

[0023] like Figure 2 As shown, the plurality of battery cells 100 include a first battery cell 101, a second battery cell 102, a third battery cell 103, and a fourth battery cell 104. In this embodiment, the plurality of battery cells 100 include eight battery cells 100. However, the number of battery cells 100 is not limited to eight. Each battery cell 100 can be, for example, a lithium-ion battery. Each battery cell 100 can be formed of a so-called all-solid-state battery containing a solid electrolyte.

[0024] The first battery cell 101 is connected to the second battery cell 102. The third battery cell 103 is connected to the fourth battery cell 104. The first battery cell 101 and the second battery cell 102 are arranged along a first direction, and the first battery cell 101 and the third battery cell 103 are adjacent to each other along a second direction that is orthogonal to both the first direction and the up / down direction. The second battery cell 102 and the fourth battery cell 104 are adjacent to each other in the second direction. Each battery cell 100 has a shape that extends longer in the first direction than in the second direction and extends longer in the first direction than in the up / down direction. Each battery cell 100 has a shape that extends longer in the up / down direction than in the second direction.

[0025] Each battery cell 100 has at least one electrode body 110 (see Figure 3 and Figure 5 ), the collector terminal 140 and the laminated outer body 160.

[0026] The at least one electrode body 110 includes two electrode bodies 110. However, the number of electrode bodies 110 is not limited to two. Each electrode body 110 is composed of a wound body in which a positive electrode sheet and a negative electrode sheet are wound with a separator interposed between the positive electrode sheet and the negative electrode sheet. However, each electrode body 110 may be composed of a stacked body in which a positive electrode sheet and a negative electrode sheet are stacked with a separator interposed between the positive electrode sheet and the negative electrode sheet. The two electrode bodies 110 are stacked in a stacking direction ( Figure 3The stacking direction (thickness direction) corresponds to the second direction, and the orthogonal direction corresponds to the first direction.

[0027] The first battery cell 101 and the third battery cell 103 are adjacent to each other in the stacking direction. That is, the first battery cell 101 and the third battery cell 103 are examples of "a pair of adjacent battery cells" in the present disclosure. Similarly, the second battery cell 102 and the fourth battery cell 104 are examples of "a pair of adjacent battery cells" in the present disclosure.

[0028] In addition, the first battery cell 101 and the third battery cell 103 are disposed at the ends in the orthogonal direction. That is, the first battery cell 101 and the third battery cell 103 are examples of “endmost battery cells” in the present disclosure.

[0029] The collector terminal 140 is connected to the electrode body 110. The collector terminal 140 protrudes from the electrode body 110 in an orthogonal direction. The collector terminal 140, which is electrically connected to the positive electrode tab in the electrode body 110, is made of, for example, aluminum. The collector terminal 140, which is electrically connected to the negative electrode tab in the electrode body 110, is made of, for example, copper. The collector terminal 140 is formed in a flat plate shape.

[0030] like Figures 2 to 4 As shown, the collector terminal 140 in the first battery cell 101 is connected to the collector terminal 140 in the second battery cell 102. Similarly, the collector terminal 140 in the third battery cell 103 is connected to the collector terminal 140 in the fourth battery cell 104. That is, the first battery cell 101 and the second battery cell 102 are examples of "a pair of connected battery cells" in the present disclosure. Similarly, the third battery cell 103 and the fourth battery cell 104 are examples of "a pair of connected battery cells" in the present disclosure.

[0031] The laminated outer body 160 accommodates each electrode body 110 and a portion of the collector terminal 140. The laminated outer body 160 is made of a laminate film. The collector terminal 140 protrudes outward from an edge portion of the laminated outer body 160 in an orthogonal direction.

[0032] The cover sheet 200 covers the plurality of battery cells 100. More specifically, the cover sheet 200 covers the plurality of battery cells 100 to surround the battery cells 100. The cover sheet 200 is made of an insulating material such as a synthetic resin. Since each electrode body 110 is composed of a wound body, the cover sheet 200 has a Figure 5 Curved corners shown.

[0033] The cover sheet 200 includes an edge portion 202 , an upper cover portion 221 , a lower cover portion 222 , and a surrounding portion 230 .

[0034] The edge portion 202 is formed by the end portion of the cover sheet 200 in the orthogonal direction.

[0035] The upper cover portion 221 covers the upper end portions 170 of a pair of adjacent battery cells adjacent to each other in the stacking direction (see Figure 5 For example, the upper cover portion 221 covers the upper end portions 170 of the first battery cell 101 and the third battery cell 103 . The upper cover portion 221 covers the upper end portions 170 of the second battery cell 102 and the fourth battery cell 104 .

[0036] The lower covering portion 222 covers the lower end portions 180 of a pair of adjacent battery cells adjacent to each other in the stacking direction (see Figure 5 For example, the lower covering portion 222 covers the lower end portions 180 of the first and third battery cells 101 and 103 . The lower covering portion 222 also covers the lower end portions 180 of the second and fourth battery cells 102 and 104 .

[0037] The surrounding portion 230 surrounds the collector terminals 140 of a pair of connected battery cells. For example, the surrounding portion 230 surrounds the collector terminals 140 of the first battery cell 101 and the collector terminals 140 of the second battery cell 102. The surrounding portion 230 surrounds the collector terminals 140 of the third battery cell 103 and the collector terminals 140 of the fourth battery cell 104.

[0038] The battery housing 300 houses the battery module 10. In this embodiment, the battery housing 300 houses a plurality of battery cells 100 and a cover sheet 200. The battery housing 300 is made of, for example, aluminum. The battery housing 300 is formed into a rectangular parallelepiped shape elongated in a first direction. The battery housing 300 has eight three-dimensional corners 302. Figure 1 and Figure 2 As shown, the battery case 300 includes a case body 310 and a cover 320 .

[0039] The case body 310 is formed in a rectangular tube shape elongated in a first direction and surrounds the plurality of battery cells 100 and the cover sheet 200 .

[0040] The cover 320 is connected to the case body 310 by welding or the like to close the opening in the case body 310 .

[0041] In this embodiment, each three-dimensional corner portion 302 is formed by three surfaces including two adjacent surfaces of the case body 310 and the cover 320. However, the three-dimensional corner portion 302 may be formed by a curved surface or the like as long as it is in contact with three surfaces including the two adjacent surfaces of the case body 310 and the cover 320. The "rectangular parallelepiped shape" indicating the outer shape of the battery case 300 also includes a shape in which the three-dimensional corner portion 302 is formed by a curved surface or the like as described above.

[0042] The external terminal 400 is provided on the cover 320. The external terminal 400 is connected to the collector terminal 140 in the endmost battery cells 101 and 103 disposed at a position closest to the cover 320 among the plurality of battery cells 100.

[0043] The battery module 10 has a facing corner portion 12 that faces the three-dimensional corner portion 302 of the battery housing 300. The facing corner portion 12 includes the edge portion 202 of the cover sheet 200 in the orthogonal direction. The facing corner portion 12 may include the corner portion of the endmost battery cell. The corner portion of the endmost battery cell refers to the corner portion of the endmost battery cell that faces the three-dimensional corner portion 302 of the battery housing 300. In this embodiment, the corner portion of the endmost battery cell is formed by the corner portion 162 of the laminated outer body 160.

[0044] The coupling member 500 is disposed within the battery housing 300. The coupling member 500 is made of an insulating material. The coupling member 500 may be made of a thermally conductive adhesive. The coupling member 500 has a corner coupling portion 510, an upper coupling portion 521, a lower coupling portion 522, and a middle coupling portion 530.

[0045] The corner coupling portion 510 couples the three-dimensional corner portion 302 of the battery case 300 to the facing corner portion 12. In the present embodiment, the corner coupling portion 510 couples the three-dimensional corner portion 302 of the battery case 300 to the edge portion 202 of the cover sheet 200.

[0046] The upper coupling portion 521 couples the battery case 300 to the upper cover portion 221. Figure 5 As shown, the upper coupling portion 521 is provided between the upper inner surface of the housing body 310 and the upper surface of the upper cover portion 221. The upper coupling portion 521 extends longer in the orthogonal direction. The length of the upper coupling portion 521 in the orthogonal direction may be equal to or shorter than the length of each battery cell 100 in the orthogonal direction. Figure 3 As shown, the upper coupling portion 521 is spaced apart from the corner coupling portion 510 .

[0047] like Figure 3 and Figure 5 As shown, the upper coupling portion 521 spans the upper end portions of a pair of adjacent battery cells that are adjacent to each other in the stacking direction. Figure 5As shown, the upper coupling portion 521 may have a shape that is convex toward a boundary portion between a pair of adjacent battery cells adjacent to each other in the stacking direction (a shape that is convex downward). Figure 5 As shown, the upper coupling portion 521 is spaced apart from a corner between an upper portion and a side portion of the housing body 310 .

[0048] The lower coupling portion 522 couples the battery case 300 to the lower covering portion 222. Figure 5 As shown, the lower joint portion 522 is provided between the lower inner surface of the housing body 310 and the lower surface of the lower cover portion 222. The lower joint portion 522 extends longer in the orthogonal direction. The length of the lower joint portion 522 in the orthogonal direction may be equal to or shorter than the length of each battery cell 100 in the orthogonal direction. Figure 3 As shown, the lower joint portion 522 is spaced apart from the corner joint portion 510 .

[0049] like Figure 3 and Figure 5 As shown, the lower joint portion 522 spans the lower end portions of a pair of adjacent battery cells that are adjacent to each other in the stacking direction. Figure 5 As shown, the lower coupling portion 522 may have a shape that is convex toward a boundary portion between a pair of adjacent battery cells adjacent to each other in the stacking direction (a shape that is convex upward). Figure 5 As shown, the lower coupling portion 522 is spaced apart from a corner between the lower portion and the side of the housing body 310 .

[0050] The intermediate joint portion 530 joins the battery case 300 to the surrounding portion 230. Figure 3 and Figure 4 As shown, the intermediate joint 530 is provided between the inner surface of the housing body 310 and the outer surface of the surrounding portion 230. Figure 3 and Figure 4 As shown, the middle joint portion 530 is spaced apart from the upper joint portion 521. The middle joint portion 530 may be spaced apart from the lower joint portion 522.

[0051] In this embodiment, the coupling member 500 has only the corner coupling portion 510, the upper coupling portion 521, the lower coupling portion 522, and the middle coupling portion 530. In other words, the coupling portion is not provided at a portion of the inner surface of the battery case 300 other than the portion in contact with the corner coupling portion 510, the upper coupling portion 521, the lower coupling portion 522, and the middle coupling portion 530.

[0052] Next, there will be described a method for manufacturing the storage cell 1. The manufacturing method includes a covering step, an inserting step, and a supplying step.

[0053] In the covering step, the plurality of battery cells 100 are covered with the cover sheet 200 .

[0054] In the inserting step, the battery module 10 is inserted into the case body 310 along a first direction.

[0055] Then, reference will be made to Figure 6 and Figure 7 Describe the supply step. In the supply step, a bonding material 501 for forming a bonding member 500 is supplied into the battery case 300. In the supply step, a supply tool 50 that can supply the bonding material 501 is used. The supply tool 50 has a receiving portion 52 that can accommodate the bonding material 501 and a discharge portion 54 that discharges the bonding material 501. The receiving portion 52 can be, for example, a syringe. The discharge portion 54 is formed in a cylindrical shape. The base end portion of the discharge portion 54 is connected to the receiving portion 52. The length of the discharge portion 54 in the first direction is substantially equal to the length of the shell body 310 in the first direction.

[0056] In the supply step, the discharge portion 54 is inserted into the gap between the case body 310 and the battery module 10 disposed in the case body 310. In this case, as shown in FIG. Figure 7 As shown, the discharge portion 54 can be inserted between the corner of the case body 310 and the corner 250 of the cover sheet 200. The bonding material 501 contained in the receiving portion 52 is then discharged from the discharge portion 54 to, for example, the three-dimensional corner 302 of the battery case 300. This forms the corner bonding portion 510. The upper bonding portion 521, lower bonding portion 522, and intermediate bonding portion 530 are also formed through the same operation as described above.

[0057] Then, the cover 320 is welded to the case body 310 , thereby completing the storage cell 1 .

[0058] As described above, in the storage battery 1 according to this embodiment, since the three-dimensional corner 302 of the battery case 300 and the facing corner 12 of the battery module 10 are combined by the corner combining portion 510 , relative displacement of the battery module 10 with respect to the battery case 300 is effectively suppressed.

[0059] Furthermore, since the upper cover 221 is coupled to the battery case 300 through the upper coupling portion 521 and the lower cover 222 is coupled to the battery case 300 through the lower coupling portion 522 , relative displacement of the battery module 10 with respect to the battery case 300 is further suppressed.

[0060] In addition, since the surrounding portion 230 is coupled to the battery case 300 through the intermediate coupling portion 530 , relative displacement of the battery module 10 with respect to the battery case 300 is further suppressed.

[0061] Hereinafter, modifications of the above-described embodiment will be described.

[0062] <First Modification>

[0063] like Figure 8 As shown, the corner coupling portion 510 may couple the three-dimensional corner portion 302 of the battery case 300 to the edge portion 202 of the cover sheet 200 and the corner portion 162 of the endmost battery cell.

[0064] In this regard, since both the cover sheet 200 and the endmost battery cell are bonded to the battery case 300 through the corner bonding portion 510 , relative displacement of the battery module 10 with respect to the battery case 300 is more reliably suppressed.

[0065] <Second Modification>

[0066] like Figure 9 As shown, the upper bonding portion 521 can bond the battery case 300 to the upper cover 221 and the upper end portions 170 of a pair of adjacent battery cells. In this example, the upper cover 221 is provided with a through hole h21. Therefore, the bonding material supplied between the battery case 300 and the upper cover 221 during the supplying step contacts the upper end portions 170 of the pair of adjacent battery cells via the through hole h21.

[0067] In this regard, since both the cover sheet 200 and a pair of adjacent battery cells are coupled to the battery case 300 through the upper coupling portion 521 , relative displacement of the battery module 10 with respect to the battery case 300 is more reliably suppressed.

[0068] <Third Modification>

[0069] As in the second modification, the lower bonding portion 522 can bond the battery case 300 to the lower cover 222 and the lower end portions 180 of a pair of adjacent battery cells. In this example, the lower cover 222 is provided with a through hole h22. Therefore, the bonding material supplied between the battery case 300 and the lower cover 222 during the supplying step contacts the lower end portions 180 of the pair of adjacent battery cells via the through hole h22.

[0070] <Fourth Variant>

[0071] like Figure 8 As shown, the intermediate joint 530 can join the battery case 300 to the surrounding portion 230 and the current collector terminals 140 of the pair of connected battery cells. In this example, the surrounding portion 230 is provided with a through hole h23. Therefore, the bonding material supplied between the battery case 300 and the surrounding portion 230 in the supply step covers the current collector terminals 140 via the through hole h23.

[0072] In this regard, separation between the collector terminals 140 due to vibration, etc. is suppressed. In addition, since the coupling member 500 is made of an insulating material, the occurrence of a short circuit due to contact between the connection portion between the collector terminal 140 in the first battery cell 101 and the collector terminal 140 in the second battery cell 102 and the connection portion between the collector terminal 140 in the third battery cell 103 and the collector terminal 140 in the fourth battery cell 104 is suppressed.

[0073] Those skilled in the art will appreciate that the above-described exemplary embodiments are specific examples in the following aspects.

[0074] [Aspect 1]

[0075] A storage battery, comprising:

[0076] A battery module, the battery module comprising a plurality of battery cells;

[0077] a battery housing that houses the battery module; and

[0078] A coupling member is provided in the battery housing, wherein

[0079] The battery case is formed into a rectangular parallelepiped shape,

[0080] The battery module has a facing corner portion facing a three-dimensional corner portion of the battery housing, and

[0081] The coupling member includes a corner coupling portion coupling the three-dimensional corner of the battery case to the facing corner.

[0082] In the storage battery, since the three-dimensional corners of the battery case and the facing corners of the battery module are joined by the corner joining portions, relative displacement of the battery module with respect to the battery case is effectively suppressed.

[0083] [Aspect 2]

[0084] The storage battery according to aspect 1, wherein:

[0085] The battery module further includes a cover sheet covering the plurality of battery cells together;

[0086] Each of the plurality of battery cells comprises:

[0087] electrode body, and

[0088] a current collecting terminal protruding from the electrode body in a direction orthogonal to both the stacking direction and the up / down direction of the electrode body; and

[0089] The facing corner portion includes an edge portion of the cover sheet in an orthogonal direction.

[0090] [Aspect 3]

[0091] The storage battery according to aspect 2, wherein:

[0092] The plurality of battery cells include an endmost battery cell disposed at an end portion in an orthogonal direction,

[0093] The endmost battery cell has a corner facing the three-dimensional corner of the battery case,

[0094] The corner-facing portion also includes the corner portion of the endmost battery cell, and

[0095] The corner bonding portion bonds the three-dimensional corner of the battery case to the edge portion of the cover sheet and the corner of the endmost battery cell.

[0096] In this regard, since both the cover sheet and the endmost battery cell are joined to the battery case by the corner joint, relative displacement of the battery module with respect to the battery case is more reliably suppressed.

[0097] [Aspect 4]

[0098] The storage battery according to aspect 2 or 3, wherein:

[0099] The plurality of battery cells include a pair of adjacent battery cells adjacent to each other in a stacking direction,

[0100] The cover sheet includes an upper cover portion that covers upper end portions of the pair of adjacent battery cells, and

[0101] The coupling member includes an upper coupling portion coupling the battery case to the upper covering portion.

[0102] In this aspect, since the upper cover portion is coupled to the battery case through the upper coupling portion, relative displacement of the battery module with respect to the battery case is suppressed.

[0103] [Aspect 5]

[0104] The storage battery according to aspect 4, wherein:

[0105] The upper cover is provided with a through hole, and

[0106] The upper coupling portion couples the battery case to the upper covering portion and upper end portions of the pair of adjacent battery cells.

[0107] In this aspect, since both the upper cover portion and the pair of adjacent battery cells are joined to the battery case through the upper joining portion, relative displacement of the battery module with respect to the battery case is more reliably suppressed.

[0108] [Aspect 6]

[0109] The storage battery according to any one of aspects 2 to 5, wherein

[0110] The plurality of battery cells include a pair of adjacent battery cells adjacent to each other in a stacking direction,

[0111] The cover sheet includes a lower cover portion covering lower end portions of the pair of adjacent battery cells, and

[0112] The coupling member includes a lower coupling portion coupling the battery case to the lower cover portion.

[0113] In this aspect, since the lower cover portion is coupled to the battery case through the lower coupling portion, relative displacement of the battery module with respect to the battery case is suppressed.

[0114] [Aspect 7]

[0115] The storage battery according to aspect 6, wherein:

[0116] The lower cover is provided with a through hole, and

[0117] The lower coupling portion couples the battery case to a lower covering portion and lower end portions of the pair of adjacent battery cells.

[0118] In this aspect, since both the lower cover portion and the pair of adjacent battery cells are joined to the battery case through the lower joining portion, relative displacement of the battery module with respect to the battery case is more reliably suppressed.

[0119] [Aspect 8]

[0120] The storage battery according to any one of aspects 2 to 7, wherein

[0121] The plurality of battery cells include a pair of connected battery cells connected to each other in orthogonal directions,

[0122] a current collecting terminal in one of the pair of connected battery cells is connected to a current collecting terminal in the other of the pair of connected battery cells,

[0123] The cover sheet includes a surrounding portion surrounding the collector terminals in the pair of connected battery cells, and

[0124] The coupling member includes an intermediate coupling portion coupling the battery case to the surrounding portion.

[0125] In this aspect, since the surrounding portion is joined to the battery case through the intermediate joining portion, relative displacement of the battery module with respect to the battery case is suppressed.

[0126] [Aspect 9]

[0127] The storage battery according to aspect 8, wherein:

[0128] The surrounding portion is provided with a through hole, and

[0129] The intermediate joint portion joins the battery case to the surrounding portion and the current collecting terminals in the pair of connected battery cells.

[0130] In this respect, separation between the current collecting terminals due to vibration or the like is suppressed.

[0131] [Aspect 10]

[0132] The storage battery according to any one of aspects 1 to 9, wherein the joining member is made of a thermally conductive adhesive.

[0133] In this aspect, the battery cells are effectively cooled by cooling the battery case.

[0134] [Aspect 11]

[0135] A method for manufacturing the storage battery according to any one of aspects 1 to 10, the method comprising:

[0136] Inserting step: inserting the battery module into the battery housing; and

[0137] Supplying step: supplying a bonding material for forming a bonding member into the battery case, wherein

[0138] In the supplying step, a supply tool is used, which has a receiving portion and a discharge portion, wherein the receiving portion is capable of receiving the bonding material, and the discharge portion is connected to the receiving portion to discharge the bonding material, and the bonding material is supplied to the three-dimensional corner of the battery case by inserting the discharge portion between the corner of the battery case and the battery module.

[0139] Although the embodiments of the present disclosure have been described, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every aspect. The scope of the present disclosure is defined by the scope of the claims, and is intended to include any modifications within the scope and meaning equivalent to the scope of the claims.

Claims

1. A storage battery comprising: A battery module, the battery module comprising a plurality of battery cells; a battery housing, the battery housing housing the battery module; as well as A coupling member is provided in the battery housing, wherein The battery case is formed into a rectangular parallelepiped shape, The battery module has a facing corner portion facing a three-dimensional corner portion of the battery housing, and The coupling member includes a corner coupling portion coupling a three-dimensional corner of the battery case to the facing corner.

2. The storage battery according to claim 1, wherein The battery module further includes a cover sheet, which covers the plurality of battery cells together; Each of the plurality of battery cells comprises: electrode body, and a current collecting terminal protruding from the electrode body in a direction orthogonal to both the stacking direction and the up / down direction of the electrode body; and The facing corner portion includes an edge portion of the cover sheet in the orthogonal direction.

3. The storage battery according to claim 2, wherein The plurality of battery cells include an endmost battery cell disposed at an end portion in the orthogonal direction, The endmost battery cell has a corner facing a three-dimensional corner of the battery case, The corner-facing portion also includes the corner portion of the endmost battery cell, and The corner coupling portion couples a three-dimensional corner of the battery case to an edge portion of the cover sheet and a corner of the endmost battery cell.

4. The storage battery according to claim 2, wherein The plurality of battery cells include a pair of adjacent battery cells adjacent to each other in the stacking direction, The cover sheet includes an upper cover portion that covers upper end portions of the pair of adjacent battery cells, and The coupling member includes an upper coupling portion coupling the battery case to the upper covering portion.

5. The storage battery according to claim 4, wherein The upper cover is provided with a through hole, and The upper coupling portion couples the battery case to the upper covering portion and upper end portions of the pair of adjacent battery cells.

6. The storage battery according to claim 2, wherein The plurality of battery cells include a pair of adjacent battery cells adjacent to each other in the stacking direction, The cover sheet includes a lower cover portion that covers lower end portions of the pair of adjacent battery cells, and The coupling member includes a lower coupling portion coupling the battery case to the lower covering portion.

7. The storage battery according to claim 6, wherein The lower cover is provided with a through hole, and The lower coupling portion couples the battery case to the lower covering portion and lower end portions of the pair of adjacent battery cells.

8. The storage battery according to claim 2, wherein The plurality of battery cells include a pair of connected battery cells connected to each other in the orthogonal direction, a current collecting terminal in one of the pair of connected battery cells is connected to a current collecting terminal in the other of the pair of connected battery cells, The cover sheet includes a surrounding portion that surrounds the current collecting terminals in the pair of connected battery cells, and The coupling member includes an intermediate coupling portion coupling the battery case to the surrounding portion.

9. The storage battery according to claim 8, wherein The surrounding portion is provided with a through hole, and The intermediate joint portion joins the battery case to the surrounding portion and the current collecting terminals in the pair of connected battery cells.

10. The storage battery according to any one of claims 1 to 9, wherein The coupling member is made of a thermally conductive adhesive.

11. A method for manufacturing the storage battery according to claim 1, the method comprising: Inserting step: inserting the battery module into the battery housing; as well as Supplying step: supplying a bonding material for forming the bonding member into the battery case, wherein In the supplying step, a supply tool is used, which has a receiving portion and a discharge portion, wherein the receiving portion is capable of receiving the bonding material, and the discharge portion is connected to the receiving portion to discharge the bonding material, and the bonding material is supplied to the three-dimensional corner of the battery case by inserting the discharge portion between the corner of the battery case and the battery module.

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