Electricity storage device

Abstract

The invention relates to a power storage device. The power storage device includes a power storage module including a plurality of power storage cells, and a case accommodating the power storage module. The outer surfaces of the housing are each provided with a recess indicating a cutting portion of the housing to be cut when the power storage device is detached.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This non-provisional application is based on Japanese Patent Application No. 2024-039940 filed with the Japan Patent Office on March 14, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a power storage device. Background Art

[0004] Japanese National Patent Publication No. 2023-502457 discloses a battery including a housing and a plurality of electrode assembly groups disposed in the housing. Summary of the Invention

[0005] Although not explicitly described in Japanese National Patent Publication No. 2023-502457, batteries (electricity storage devices) can be disassembled for recycling, etc. In this case, for example, the battery must be cut at an appropriate location to avoid damaging the electrode assembly group (electricity storage cell). However, for example, it may take an inexperienced worker a long time to identify the appropriate location. In this case, cutting the battery at the appropriate location takes a long time.

[0006] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide an electricity storage device capable of suppressing an increase in the time required to cut the electricity storage device at an appropriate position.

[0007] A power storage device according to one aspect of the present disclosure includes a power storage module including at least one power storage cell and a housing accommodating the power storage module. An outer surface of the housing is provided with an information providing portion indicating a cutting portion of the housing to be cut when the power storage device is disassembled.

[0008] In the power storage device according to aspects of the present disclosure, as described above, the outer surface of the housing is provided with an information display portion that indicates the cutting portion of the housing to be cut when disassembling the power storage device. Therefore, by pre-setting the cutting portion at a location suitable for cutting the battery, the housing can be easily cut at the appropriate location based on the information indicated by the information display portion. This can thus prevent an increase in the time required to cut the power storage device at the appropriate location.

[0009] In the power storage device according to this aspect, the at least one power storage cell preferably includes a plurality of power storage cells. The power storage module includes a connection portion that connects different power storage cells among the plurality of power storage cells. The cut portion corresponds to the connection portion. With this configuration, since the portion of the housing corresponding to the connection portion provided between the power storage cells is cut, the power storage cells can be prevented from being cut (damaged).

[0010] In the power storage device according to this aspect, the housing preferably has a sealed structure. When the housing is sealed, visual inspection of the interior of the housing is difficult. Therefore, providing an information display portion on the outer surface of the housing indicating the cut portion of the housing is particularly effective in identifying the cut portion of the housing (a location suitable for cutting) without visually inspecting the interior of the housing.

[0011] In the power storage device according to this aspect, preferably, the cutting portion includes a fragile portion. With this configuration, it is possible to facilitate (simplify) the operation of cutting the case along the cutting portion.

[0012] In the power storage device according to this aspect, the information providing portion preferably includes at least one of a line and a mark provided on the outer surface of the housing to indicate the cut portion, so that the cut portion is visually identifiable. With this configuration, the cut portion of the housing can be easily identified based on the at least one of the line and the mark.

[0013] In the power storage device according to this aspect, preferably, the information providing portion includes at least one of a recessed portion and a convex portion formed on the outer surface of the housing to indicate the cut portion so that the cut portion is visually identifiable. With this configuration, the cut portion of the housing can be easily identified based on the at least one of the recessed portion and the convex portion.

[0014] In the power storage device according to this aspect, the information providing unit preferably includes a member attached to the outer surface of the housing to indicate the cut portion so that the cut portion is visually identifiable. With this configuration, the cut portion of the housing can be easily identified based on the member attached to the outer surface of the housing.

[0015] In the power storage device according to this aspect, preferably, the information providing unit includes a code, and information about the cut portion can be obtained by imaging the code through the information acquiring unit. With this configuration, the cut portion of the housing can be easily identified based on the information obtained by imaging the code.

[0016] 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 which is to be read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view showing the configuration of a power storage device according to the embodiment.

[0018] Figure 2 is a partial perspective view showing, on an enlarged scale, the configuration of a case and a storage module according to an embodiment.

[0019] Figure 3is a schematic plan view showing the arrangement of a plurality of storage cells according to the embodiment.

[0020] Figure 4 is an exploded perspective view showing the configuration of a storage battery according to the embodiment.

[0021] Figure 5 1 is a side view showing the configuration of the power storage device according to the embodiment from the Y1 side.

[0022] Figure 6 : is a side view showing the configuration of the power storage device according to the embodiment from the X1 side.

[0023] Figure 7 It is along Figure 5 Cross-sectional view along line VII-VII.

[0024] Figure 8 It is along Figure 6 Cross-sectional view along line VIII-VIII in FIG.

[0025] Figure 9 It is along Figure 5 Cross-sectional view along line IX-IX.

[0026] Figure 10 is a side view showing the configuration of a power storage device according to a first modification of the embodiment.

[0027] Figure 11 is a partial cross-sectional view showing, on an enlarged scale, a protrusion provided on a housing according to a second modification of the embodiment.

[0028] Figure 12 is a side view showing the configuration of a power storage device according to a third modification of the embodiment.

[0029] Figure 13 is a perspective view showing the configuration of a power storage device according to a fourth modification of the embodiment. DETAILED DESCRIPTION

[0030] The embodiments of the present disclosure are described with reference to the accompanying drawings. In the drawings referred to below, the same reference numerals represent the same or equivalent components.

[0031] Figure 1 This is a perspective diagram schematically illustrating a power storage device 1 according to an embodiment of the present disclosure. For example, power storage device 1 stores electricity for driving an electric vehicle (not shown). Power storage device 1 can be installed in electrical devices other than electric vehicles, such as stationary power storage devices. The X, Y, and Z directions in this specification are orthogonal to each other. For example, the X and Y directions can be the front-to-back direction and the left-to-right direction of the electric vehicle, respectively. The Z direction can be the vertical direction.

[0032] like Figure 1 and Figure 2 As shown, the power storage device 1 includes a housing 100 and a power storage module 200 (see Figure 2 ). The housing 100 is made of, for example, aluminum.

[0033] refer to Figure 1 , the housing 100 is formed in the shape of a rectangular parallelepiped. The housing 100 is formed in the shape of a rectangular parallelepiped that is longer in the X direction. Specifically, the housing 100 has a dimension L1 in the X direction. The housing 100 has a dimension L2 in the Y direction. Dimension L1 is greater than dimension L2. The housing 100 has a height H in the Z direction. Height H is less than dimension L1. Height H is greater than dimension L2. The shape of the housing 100 (the size relationship between each dimension in multiple directions) is not limited to the above example.

[0034] Reference Figure 2 The housing 100 includes a housing body 10 and a cover 20. The housing body 10 is formed into a rectangular tube shape that is longer in the X direction. The cover 20 is connected to the housing body 10 by welding or the like so as to close the opening 10a on the X2 side of the housing body 10. The housing body 10 has no openings other than the opening 10a. That is, the housing 100 has a sealed structure. The storage module 200 is inserted into the housing body 10 through the opening 10a. Figure 2 , for simplicity, the recessed portion 11 described later is not shown.

[0035] The storage module 200 includes a plurality of storage cells 210. In the present embodiment, the number of storage cells 210 is eight. However, the number of storage cells 210 is not limited to eight. Examples of each storage cell 210 include lithium-ion batteries. Each storage cell 210 can be composed of a so-called all-solid-state battery including a solid electrolyte. Each of the plurality of storage cells 210 has a shape that extends longer in the X direction than in the Y direction and longer in the X direction than in the Z direction. Each of the plurality of storage cells 210 has a shape that extends longer in the Z direction than in the Y direction.

[0036] like Figure 3As shown, eight storage cells 210 are electrically connected in series. The eight storage cells 210 include storage cell 210A, storage cell 210B, storage cell 210C, storage cell 210D, storage cell 210E, storage cell 210F, storage cell 210G, and storage cell 210H. Storage cells 210A to 210D are arranged along the X direction. Specifically, storage cell 210A, storage cell 210B, storage cell 210C, and storage cell 210D are arranged in this order from the X2 side. Storage cells 210E to 210H are arranged along the X direction. Specifically, storage cell 210E, storage cell 210F, storage cell 210G, and storage cell 210H are arranged in this order from the X1 side.

[0037] The rows of storage cells 210A to 210D and the rows of storage cells 210E to 210H are adjacent to each other in the Y direction. Specifically, storage cell 210A and storage cell 210H are adjacent to each other in the Y direction. Storage cell 210B and storage cell 210G are adjacent to each other in the Y direction. Storage cell 210C and storage cell 210F are adjacent to each other in the Y direction. Storage cell 210D and storage cell 210E are adjacent to each other in the Y direction.

[0038] Storage battery 210A and storage battery 210B are electrically connected via connection portion 220. Storage battery 210B and storage battery 210C are electrically connected via connection portion 220. Storage battery 210C and storage battery 210D are electrically connected via connection portion 220. Storage battery 210D and storage battery 210E are electrically connected via connection portion 220. Storage battery 210E and storage battery 210F are electrically connected via connection portion 220. Storage battery 210F and storage battery 210G are electrically connected via connection portion 220. Storage battery 210G and storage battery 210H are electrically connected via connection portion 220. Connection portion 220 electrically connecting storage battery 210D and storage battery 210E is bent into a U-shape. Each of the plurality of connection portions 220, except for connection portion 220 between storage battery 210D and storage battery 210E, is formed into a linear shape.

[0039] Figure 4 2 is an exploded perspective view of a storage battery 210. Each storage battery 210 includes at least one electrode assembly 211, a separator 212, a terminal member 213, a collector terminal 214, a cover 215, and a laminated outer package 216 (see, for example, Figure 9 ).exist Figure 4 In FIG, the laminated outer packaging member 216 is not shown. Figure 2 In the figure, the storage battery 210B is not shown (see Figure 3 ) of the laminated outer package 216 and the storage battery 210G (see Figure 3 ) of the laminated outer packaging 216.

[0040] The at least one electrode assembly 211 includes two electrode assemblies 211. However, the number of electrode assemblies 211 is not limited to two. Each electrode assembly 211 is formed by a winding body in which the positive electrode sheet and the negative electrode sheet are wound with a separator interposed therebetween. However, each electrode assembly 211 may be formed by a stacked body in which the positive electrode sheet and the negative electrode sheet are stacked with a separator interposed therebetween. The two electrode assemblies 211 are adjacent to each other in the Y direction in which the positive electrode sheet and the negative electrode sheet are stacked on each other. Each electrode assembly 211 is formed into a shape that is longer in the X direction.

[0041] Each electrode assembly 211 includes a coating portion 211a and an electrode tab 211b. The coating portion 211a is the region of the electrode foil in the positive or negative electrode sheet where the active material layer is provided. The electrode tab 211b is the region of the electrode foil in the positive or negative electrode sheet where the active material layer is not provided (i.e., the exposed, uncoated portion of the electrode foil).

[0042] A spacer 212 is provided between a pair of adjacent electrode tabs 211b. The spacer 212 is made of an electrically insulating material, such as a synthetic resin. The spacer 212 has a shape in which its size in the Y direction gradually increases as the distance from the coating portion 211a in the X direction increases.

[0043] The terminal member 213 is connected to the outer side surface of the spacer 212 in the X direction. The terminal member 213 is made of a conductive material (metal such as copper or aluminum). The terminal member 213 is connected to a pair of electrode tabs 211b adjacent to each other in the Y direction.

[0044] The collector terminal 214 is connected to the terminal member 213. The collector terminal 214, which is electrically connected to the electrode tab 211b, which serves as the positive electrode tab, via the terminal member 213, is made of, for example, aluminum. The collector terminal 214, which is electrically connected to the electrode tab 211b, which serves as the negative electrode tab, via the terminal member 213, is made of, for example, copper. The collector terminal 214 includes a connecting portion 214a and a protruding portion 214b.

[0045] The connection portion 214a is connected to the outer side surface of the terminal member 213 in the X direction by welding, etc. The connection portion 214a is formed in a flat plate shape.

[0046] The protrusion 214b protrudes outward from the connection portion 214a in the X direction. The protrusion 214b is formed in a flat plate shape. The storage cells 210 electrically connected to each other are electrically connected by connecting their respective protrusions 214b to each other. The protrusions 214b electrically connected to each other form the connection portion 220 (see Figure 3 ).

[0047] The cover 215 covers the end portion (electrode tab 211 b ) of the electrode assembly 211 in the X direction. The cover 215 is made of an electrically insulating material such as a synthetic resin. The cover 215 is provided with a through hole 215 a through which the protrusion 214 b is inserted.

[0048] The laminated outer package 216 accommodates each electrode assembly 211, the separator 212, the terminal member 213, a part of the collector terminal 214, and the cover 215. The laminated outer package 216 is formed of a laminate film.

[0049] External terminal 21 (see Figure 2 ) is provided on the cover 20. The external terminal 21 is electrically connected to the collector terminal 214 on the X2 side of the storage battery 210 (the storage batteries 210A and 210H) located closest to the cover 20 among the plurality of storage batteries 210.

[0050] Energy storage devices may be disassembled for recycling, for example. In this case, the energy storage device must be cut at the appropriate location to avoid damaging the battery cells. However, for example, it may take an inexperienced worker a long time to identify the appropriate location. In this case, it takes a long time to cut the energy storage device at the appropriate location.

[0051] Therefore, in this embodiment, if Figure 1 As shown, a recess 11 is provided on the outer surface 101 of the housing 100. The recess 11 indicates the cut portion of the housing 100 to be cut when disassembling the power storage device 1. The cut portion of the housing 100 is indicated by the recess 11 so that it can be visually identified. The outer surface 101 is, for example, a pair of side surfaces 101a (see FIG. 1 ) perpendicular to the Y direction. Figure 7 ) is provided on the outer surface of the side surface 101a on the Y1 side. A plurality of (in this embodiment, four) recesses 11 are provided on the outer surface 101. The plurality of recesses 11 are arranged side by side along the X direction. By cutting the storage device 1 along the recesses 11, the storage cells 210 arranged along the X direction are separated from each other. In addition, the external terminal 21 and the storage cells 210 arranged in the X direction are separated from each other. Cutting the storage device 1 along the recesses 11 means cutting the storage device 1 at the position in the X direction where the recesses 11 are provided. The recesses 11 are an example of an "information providing portion" in the present disclosure.

[0052] Recess 11 is provided so as to extend along the Z-direction on outer surface 101. Specifically, recess 11 forms a groove extending along the Z-direction on outer surface 101. Specifically, recess 11 extends from the end of outer surface 101 on the Z1 side to the end of outer surface 101 on the Z2 side. The shape, length, etc. of recess 11 are not limited to the above examples.

[0053] The outer surface 102 of the housing 100 is provided with a recess 12 indicating a cut portion of the housing 100 to be cut when the power storage device 1 is disassembled. The outer surface 102 is, for example, an outer surface provided on a side surface 102a on the X1 side, which is included in a pair of side surfaces 102a orthogonal to the X direction (see Figure 8 ). Only one recess 12 is provided on outer surface 102. By cutting power storage device 1 along recess 12, adjacent power storage cells 210 in the Y direction are separated from each other. Cutting power storage device 1 along recess 12 means cutting power storage device 1 at the position where recess 12 is provided in the Y direction. Recess 12 is an example of an "information providing portion" in this disclosure.

[0054] The recess 12 is provided so as to extend along the Z direction on the outer surface 102. Specifically, the recess 12 forms a groove extending along the Z direction on the outer surface 102. Specifically, the recess 12 extends from the end of the outer surface 102 on the Z1 side to the end of the outer surface 102 on the Z2 side. The shape, length, etc. of the recess 12 are not limited to the above examples.

[0055] In this embodiment, the cutout portion of the housing 100 indicated by the recesses (11, 12) corresponds to the connection portion 220 (see, for example, Figure 3 ) part. Reference Figure 5 Describe the details.

[0056] Figure 5 is a front view of the outer surface 101. Figure 5 As shown, each of the plurality of recesses 11 is provided at a position overlapping with the connection portion 220 (protrusion 214b) in the Y direction. Specifically, of the four recesses 11 provided on the outer surface 101, each of the three recesses 11 on the X1 side is provided at a position overlapping with the connection portion 220 in the Y direction. Of the four recesses 11 provided on the outer surface 101, the endmost recess 11 on the X2 side is provided at a position in the Y direction that overlaps with the protrusion 214b that electrically connects the endmost storage cell 210 (210A, 210H) on the X2 side to the external terminal 21.

[0057] Each of the plurality of recesses 11 has a width W1 in the X direction. The connection portion 220 connecting the storage cells 210 adjacent to each other in the X direction has a width W2 in the X direction. The width W1 is smaller than the width W2. The width W2 is the width of the protrusion 214b (see FIG. Figure 4 ) in the X direction from the through hole 215a (see Figure 4 ) protrudes twice as far. Therefore, width W1 can be less than half of width W2. Therefore, each of the plurality of recesses 11 is prevented from being provided in a position overlapping with the storage battery 210 in the Y direction.

[0058] Figure 6 is a front view of the outer surface 102. Figure 6 As shown, recess 12 is provided at a position overlapping with connection portion 220 in the X direction. Specifically, recess 12 is provided at the center of outer surface 102 in the Y direction. Therefore, recess 12 is provided at a position overlapping with the portion between two storage cells 210 arranged side by side in the Y direction (the contact surface between storage cells 210) in the X direction.

[0059] In this embodiment, the cut portion of the housing 100 indicated by the recess 11 (12) includes a fragile portion. In other words, the fragile portion is formed at a position corresponding to the cut portion.

[0060] Specifically, if Figure 7 As shown, by providing recessed portion 11 on outer surface 101, thin portion 11a is formed on side surface 101a. Specifically, thin portion 11a is a portion of side surface 101a located on the Y2 side (the inner surface side of housing body 10) of recessed portion 11. Thin portion 11a is an example of a "fragile portion" in this disclosure.

[0061] The thin portion 11a has a thickness t1 in the Y direction. The thickness t1 of the thin portion 11a is smaller than the thickness t2 of the portion of the side surface 101a not provided with the thin portion 11a in the Y direction. For example, the thickness t1 may be less than or equal to half the thickness t2.

[0062] In addition, if Figure 8 As shown, by providing the recess 12 on the outer surface 102, a thin portion 12a is formed on the side surface 102a. The thin portion 12a is a portion of the side surface 102a located on the Y2 side (the inner surface side of the housing body 10) of the recess 12. The thin portion 12a is an example of a "fragile portion" in the present disclosure.

[0063] Thin portion 12a has a thickness t11 in the X direction. Thickness t11 of thin portion 12a is smaller than thickness t12 of a portion of side surface 102a not provided with thin portion 12a in the X direction. For example, thickness t11 may be less than or equal to half of thickness t12.

[0064] Figure 9 It is along Figure 5 The storage module 200 includes a cover sheet 230. The cover sheet 230 is housed in the case 100. The case body 10 surrounds the plurality of storage cells 210 and the cover sheet 230.

[0065] The cover sheet 230 covers the plurality of storage cells 210. Specifically, the cover sheet 230 covers the storage cells 210 so as to collectively surround the plurality of storage cells 210. The cover sheet 230 is made of an electrically insulating material such as a synthetic resin.

[0066] The cutting of the power storage device 1 includes a first step in which the power storage device 1 is cut along the protrusion 214b (see FIG. 21) corresponding to the connection between the power storage cell 210 and the external terminal 21. Figure 5 ) is cut; a second step in which the power storage device 1 is cut along the three recesses 11 corresponding to the connection portion 220 after the first step; and a third step in which the power storage device 1 is cut along the recess 12 after the second step. The order of the cutting steps is not limited to the above example.

[0067] As described above, in the power storage device 1 according to the present embodiment, the outer surface (101, 102) of the case 100 is provided with recessed portions (11, 12), which indicate the cutting portion of the case 100 to be cut when the power storage device 1 is disassembled. Therefore, the power storage device 1 can be cut by using the recessed portions (11, 12) as indicators. Therefore, the power storage device 1 can be appropriately cut by cutting the power storage device 1 along the recessed portions (11, 12) without having to identify the appropriate cutting position of the power storage device 1.

[0068] In the power storage device 1 according to this embodiment, the cut portion of the housing 100 indicated by the recesses ( 11 , 12 ) includes a portion corresponding to the connection portion 220 . Therefore, by cutting the housing 100 along the recesses ( 11 , 12 ), the connection portion 220 can be cut, and the plurality of power storage cells 210 can be separated from each other. This prevents the power storage cells 210 themselves from being cut. As a result, the power storage cells 210 can be easily recycled.

[0069] Although the example in which the cutout portion of the housing 100 is indicated by the recesses ( 11 , 12 ) is presented in the above embodiment, the present disclosure is not limited to this example. The cutout portion of the housing may be indicated by something other than the recesses.

[0070] For example, in Figure 10 In the example shown, the cut portion of the housing 300 is indicated by a line 311 and a mark 312 so as to be visually identifiable. The line 311 is provided so as to extend along the Z direction on the outer surface 301 of the housing 300. Figure 10 The lines 311 and the marks 312 are provided so as to be arranged along the Z direction on the outer surface 301. At least one of the lines 311 and the marks 312 may be provided on the outer surface of the housing 300 other than the outer surface 301.

[0071] Although Figure 10 311 and the mark 312 are both provided on the housing 300, but only one of the line 311 and the mark 312 may be provided on the housing 300. The shape, arrangement, etc. of each of the line 311 and the mark 312 are not limited to Figure 10In addition, the line 311 and the mark 312 may be given with a pen or the like, or may be given by discoloring metal or the like. Each of the line 311 and the mark 312 is an example of an “information providing portion” in the present disclosure.

[0072] exist Figure 11 In the illustrated example, a protrusion 411 is formed on the outer surface 401 of the housing 400, indicating the cutout portion of the housing 400 so that it can be visually identified. Thin portions 411a are formed on the side surface 401a that provides the outer surface 401 by providing the protrusion 411 on the outer surface 401. Thin portions 411a are portions of the side surface 401a that are located on the Y2 side (the inner surface of the housing body) of the recess 411. Protrusions 411 may be provided on any outer surface of the housing 400 other than the outer surface 401. Thin portions 411a are an example of a "fragile portion" in the present disclosure. Protrusions 411 are an example of an "information providing portion" in the present disclosure.

[0073] The thin portion 411a has a thickness t21 in the Y direction. The thickness t21 of the thin portion 411a is less than the thickness t22 in the Y direction of the portion of the side surface 401a where the thin portion 411a is not provided. The thin portion does not necessarily need to be formed at a position corresponding to the convex portion 411. In addition, both the recessed portions (11, 12) and the protruding portion 411 according to the above embodiment can be provided on the outer surface of the housing.

[0074] Although Figure 11 In the example shown, the housing 400 is cut at the position where the protrusion 411 is provided, but the present disclosure is not limited to this example. The portion between the protrusions provided adjacent to each other can be cut. This feature can also be applied to the above-mentioned embodiment and each modification.

[0075] In addition, Figure 12 In the example shown, a member 511 that indicates the cutout portion of the housing 500 so that it can be visually identified is attached to the outer surface 501 of the housing 500. The member 511 may be, for example, a sticker, adhesive tape, etc. The member 511 may be attached to an outer surface of the housing 500 other than the outer surface 501. The member 511 is an example of an "information providing portion" in the present disclosure.

[0076] exist Figure 13 In the example shown, a code 611 is attached to the outer surface 601 of the housing 600. The code 611 is, for example, a QR code (registered trademark). Figure 13As shown, information about the cutout of housing 600 can be obtained by imaging (reading) a code 611 by a terminal 700 (such as a smartphone, tablet, etc.). Specifically, code 611 is imaged (read) by terminal 700, and thus, positional information about the cutout of housing 600 is displayed on screen 710 of terminal 700. The positional information about the cutout is indicated by an arrow on screen 710. Code 611 can be attached to an outer surface of housing 600 other than outer surface 601. Code 611 and terminal 700 are examples of "information providing unit" and "information acquiring device," respectively, in the present disclosure.

[0077] Although not shown, a through hole may be provided instead of the recess 11 ( 12 ) according to the above embodiment. Resin or the like may be injected into the housing through the through hole.

[0078] Furthermore, a winding key for opening a can or the like may be provided on the cut portion of the housing.

[0079] Although an example in which the cut portion of the housing 100 is a thin portion ( 11 a , 12 a ) is presented in the above embodiment, the present disclosure is not limited to this example. The cut portion may be subjected to knurling (a process of forming fine irregularities or cuts in metal).

[0080] Although the above embodiment provides an example in which a plurality of storage cells 210 are housed in the housing 100 , the present disclosure is not limited to this example. The number of storage cells housed in the housing may be one.

[0081] Although the housing 100 has a sealed structure as an example in the above embodiment, the present disclosure is not limited to this example. The housing 100 does not necessarily need to be sealed.

[0082] Although the example of providing the fragile portion in the housing 100 by forming the thin portion ( 11 a , 12 a ) is proposed in the above embodiment, the present disclosure is not limited to this example. The housing does not necessarily need to be provided with the fragile portion.

[0083] While the above embodiment provides an example of providing a recess on each of outer surface 101 and outer surface 102, the present disclosure is not limited to this example. Only one of outer surface 101 and outer surface 102 may be provided with a recess. Furthermore, a recess may be provided on an outer surface of housing 100 other than outer surface 101 and outer surface 102.

[0084] The configurations in the above-described embodiment and modifications may be combined with each other.

[0085] Although the embodiments of the present disclosure have been described, it should be understood that the embodiments disclosed herein are presented in all aspects by way of illustration and example rather than limitation. The scope of the present disclosure is defined by the claims and is intended to include all changes within the spirit and scope equivalent to the claims.

Claims

1. An electric storage device comprising: A power storage module, the power storage module comprising at least one power storage battery; and a housing accommodating the battery module, wherein An outer surface of the case is provided with an information providing portion indicating a cutting portion of the case to be cut when the power storage device is disassembled.

2. The power storage device according to claim 1, wherein said at least one storage battery comprises a plurality of storage batteries, The power storage module includes a connection portion that connects different power storage cells among the plurality of power storage cells to each other, and The cutting portion is a portion corresponding to the connecting portion.

3. The power storage device according to claim 1 or 2, wherein The housing has a sealing structure.

4. The power storage device according to claim 1 or 2, wherein The cutting portion includes a fragile portion.

5. The power storage device according to claim 1 or 2, wherein The information providing portion includes at least one of a line and a mark given on an outer surface of the housing to indicate the cutting portion so that the cutting portion is visually recognizable.

6. The power storage device according to claim 1 or 2, wherein The information providing portion includes at least one of a concave portion and a convex portion formed on an outer surface of the housing to indicate the cutting portion so that the cutting portion is visually recognizable.

7. The power storage device according to claim 1 or 2, wherein The information providing portion includes a member attached to an outer surface of the housing to indicate the cutting portion so that the cutting portion is visually recognizable.

8. The power storage device according to claim 1 or 2, wherein The information providing portion includes a code, and information about the cutting portion can be obtained from imaging the code by an information acquiring device.

Images