Battery

Abstract

The utility model provides a battery, which can reduce the labor force and the working time when parts are recycled and is easy to reuse the parts of the battery. A battery is provided with a plurality of battery cells (21) and a case (3) that houses the plurality of battery cells (21) and has a fixing surface (11a) to which the plurality of battery cells (21) are fixed, and is provided with separators (40, 50, 240, 250, 340, 350) that are disposed between the battery cells (21) and extend from the fixing surface (11a) in the longitudinal direction of the battery cells (21). A solvent passage section (S) through which a solvent (100) that dissolves the separators (40, 50, 240, 250, 340, 350) can pass is formed in the plane direction along the fixing surface (11a).

Description

Technical Field

[0001] This utility model relates to batteries. Background Technology

[0002] In recent years, efforts to significantly reduce waste generation through the prevention, reduction, recycling, and reuse of waste have become increasingly active. Research and development related to the reuse of battery components have been conducted in order to achieve this.

[0003] As a technology related to the reuse of components of such batteries, Patent Document 1 discloses that in a battery in which the battery cells are bonded to a base plate by an adhesive, the adhesive between the battery cells and the base plate is softened by allowing the heat transfer medium oil heated by a heater to flow in a cooling channel mounted on the base plate, thereby removing the battery cells.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Description of Chinese Patent Application Publication No. 116487739 Utility Model Content

[0007] Technical problem to be solved by the utility model

[0008] Furthermore, in technologies related to the reuse of battery components, besides the adhesive that connects the base plate to the battery cells, the battery also includes various components such as battery cell supports to maintain insulation between the battery cells and prevent them from contacting each other. As a method for battery disassembly, one approach is to immerse the battery in a solvent to dissolve components such as the battery cell supports, thereby removing the battery cells and other components intended for recycling. However, in the case of battery cell supports, the labor and time required for dissolution cannot be reduced, making the reuse of battery components a challenging technical problem.

[0009] This invention was made in view of the above-mentioned circumstances, and its object is to provide a battery with a component that can reduce labor and time during component recycling and facilitate battery reuse. Moreover, it helps to significantly reduce the generation of waste.

[0010] Means for solving technical problems

[0011] The battery has: a plurality of battery cells; and a housing that houses the plurality of battery cells and has a fixing surface on which the plurality of battery cells are fixed, characterized in that the battery has a separator disposed between the battery cells and extending from the fixing surface along the length direction of the battery cells, and has a solvent passage portion formed in the planar direction along the fixing surface for solvent that dissolves the separator to pass through.

[0012] In the above structure, the height of the separator may be lower than the height of the battery cell, and the solvent passage may include an upper solvent passage formed at a position above the separator.

[0013] Alternatively, in the above structure, the solvent passage may include a fixed-side solvent passage formed between the partition and the housing.

[0014] Alternatively, in the above structure, the solvent passage may include a hole that penetrates the partition.

[0015] Alternatively, in the above structure, the partitions may be arranged at intervals along the length of the partitions, and the solvent passage may include the intervals.

[0016] Alternatively, in the above structure, a column member may be provided within the length direction of the partition, and the column member is fixed to the housing and supports the partition.

[0017] Utility Model Effect

[0018] It can reduce labor and time spent on component recycling, and makes it easy to reuse battery components. Moreover, it can help to significantly reduce waste generation. Attached Figure Description

[0019] Figure 1 This is a perspective view of the battery cell according to the first embodiment.

[0020] Figure 2 This is a top view of the battery cell according to the first embodiment.

[0021] Figure 3 This is a schematic diagram of a single cell assembly of the battery body according to the first embodiment.

[0022] Figure 4 It is a 3D view of the bottom surface of the battery casing and the grid partition.

[0023] Figure 5 This is an exploded 3D view of the bottom surface of the battery casing and the grid partition.

[0024] Figure 6 This is a side view of the first partition.

[0025] Figure 7 This is a side view of the first partition element of the first partition.

[0026] Figure 8 This is a side view of the second partition.

[0027] Figure 9This is a side view of the second partition element of the second partition.

[0028] Figure 10 It is a perspective view showing the partition engagement part and the periphery of the partition insertion groove of the grid partition.

[0029] Figure 11 This is a three-dimensional sectional view showing the main part of the periphery of the column component of the grid partition.

[0030] Figure 12 This is a diagram showing the relationship between the grid partition, the unit, and the bottom surface in the first embodiment.

[0031] Figure 13 This is an explanatory diagram of the disassembly of a battery cell.

[0032] Figure 14 This is an explanatory diagram of the previous single-component group.

[0033] Figure 15 This is a diagram showing the relationship between the grid partition, the unit, and the bottom surface involved in the second embodiment.

[0034] Figure 16 This is a diagram showing the relationship between the grid partition, the unit, and the bottom surface in the third embodiment.

[0035] Label Explanation

[0036] 1: Battery cell (battery);

[0037] 3: Battery casing (housing);

[0038] 11a: Top surface (fixed surface);

[0039] 21: Single cell (battery cell);

[0040] 40: First partition (partition);

[0041] 50: Second partition (partition);

[0042] 60: Column component;

[0043] 100: Solvent;

[0044] 240: First partition (partition);

[0045] 250: Second partition (partition);

[0046] 340: First partition (partition);

[0047] 350: Second partition (partition);

[0048] H1: Height;

[0049] H2: Height;

[0050] S: Solvent passage space (solvent passage section);

[0051] S1: Lower solvent passage space (fixed side solvent passage part);

[0052] S2: Upper solvent passage space (upper solvent passage section);

[0053] S3: The solvent passes through the space (pore);

[0054] S4: Spacer solvent passes through the space (space). Detailed Implementation

[0055] The embodiments of this utility model will now be described with reference to the accompanying drawings. In the drawings, the numeral "front" indicates the front, the numeral "up" indicates the top, and the numeral "left" indicates the left.

[0056] [First Implementation Method]

[0057] Figure 1 This is a perspective view of battery cell 1 according to the first embodiment. Figure 2 This is a top view of the battery cell 1 according to the first embodiment. Figure 3 This is a schematic diagram of the single cell assembly 20 of the battery body 2 according to the first embodiment.

[0058] The battery unit (battery) 1 has a battery body 2, a battery case 3 that houses the battery body 2, and a battery cover 4 that closes the battery case 3.

[0059] The battery casing 3 has a rectangular plate-shaped bottom portion 11 (see reference). Figure 2 ) and roughly plate-shaped front face 12, rear face 13, left face 14, and right face 15 set on the front, back, left and right sides of the bottom face 11.

[0060] Multiple unit groups 20 are fixed to the bottom surface 11. A unit group 20 is a component formed by modularizing a predetermined number of individual units (battery cells) 21. Each individual unit 21 is cylindrical. In this embodiment, the longitudinal direction of the individual unit 21 is referred to as the axial direction. Each individual unit 21 has a positive electrode 21a (see reference 21a) at one end of the axial direction. Figure 12 ) and negative electrode 21b (refer to) Figure 12 More specifically, the monomer 21 has a positive electrode 21a at its axial center at one end. Additionally, the monomer 21 has a negative electrode 21b surrounding it, radially separated from the positive electrode 21a. In this embodiment, the monomers 21 are arranged with their axial direction aligned vertically. The monomers 21 are arranged adjacent to each other in a direction orthogonal to the vertical direction. The monomers 21 are also arranged adjacent to each other in a front-back direction (first direction) and a left-right direction (second direction), both orthogonal to the vertical direction (axial direction). The second direction is a direction intersecting the first direction.

[0061] A plate-shaped busbar 22 is installed on the upper surface (one axial end face) of each adjacent unit 21. The busbar 22 has a three-layer structure. Figure 3 As shown, the busbar 22 has an insulating member 23 at its center in the thickness direction, a positive electrode busbar 24 above the insulating member 23, and a negative electrode busbar 25 below the insulating member 23. The positive electrode 21a of each cell 21 is electrically connected to the positive electrode busbar 24. Additionally, the negative electrode 21b of each cell 21 is electrically connected to the negative electrode busbar 25. The positive electrode 21a and negative electrode 21b of each cell 21 are connected to the busbar 22, for example, by welding. This constitutes a cell group 20 in which a predetermined number of cells 21 are adjacent to each other. The cell group 20 is a battery formed by connecting a predetermined number of cells 21 in parallel.

[0062] Monomer group 20 is disposed on the upper surface 11a of the bottom part 11 (see reference). Figure 3 Multiple unit groups 20 are arranged adjacently. In this embodiment, the unit groups 20 are connected in series. That is, the negative busbar 25 of the unit group 20 is electrically connected to the positive busbar 24 of the adjacent unit group 20. The shape of the busbar 22 of each unit group 20 is different depending on the arrangement position and connection direction, but the basic structure is the same.

[0063] In this embodiment, such as Figure 2 As shown, the cell groups 20 are arranged adjacent to each other in the front-to-back direction (first direction). Additionally, the cell groups 20 are arranged adjacent to each other in the left-to-right direction (second direction). In this embodiment, a predetermined number of cell groups 20 are connected in series in a U-shape in two columns. The predetermined number of cell groups 20 connected in series in two columns constitute the battery body 2 of this embodiment.

[0064] In a predetermined number of unit groups 20 connected in series, the positive busbar 24 at one end of the unit group 20 is electrically connected to the positive terminal 26 provided on the front end 12. Additionally, in the predetermined number of unit groups 20 connected in series, the negative busbar 25 at the other end of the unit group 20 is electrically connected to the negative terminal 27 provided on the front end 12. A connector section 28 is provided on the front end 12. A signal line (not shown) is connected to the connector section 28; this signal line is arranged above the unit group 20 and conducts signals indicating the status of the unit 21, such as temperature and balance.

[0065] Figure 4 This is a perspective view of the bottom surface 11 of the battery casing 3 and the grid partition 30. Figure 5 This is an exploded perspective view of the bottom part 11 of the battery casing 3 and the grid partition 30.

[0066] A flat upper surface (fixing surface) 11a is formed on the bottom part 11 of the battery casing 3. Fixing holes 11a1 and 11a2 for fixing the grid partition 30 are formed on the upper surface 11a. The fixing holes 11a1 and 11a2 are recessed holes in a circular shape. The grid partition 30 has a first partition (partition) 40 extending in a front-rear direction (first direction) and a second partition (partition) 50 extending in a left-right direction (second direction). The first partition 40 is fixed to the first fixing hole 11a1. The second partition 50 is fixed to the second fixing hole 11a2.

[0067] The first fixing hole 11a1 is formed at a predetermined position. In this embodiment, seven (or more) first fixing holes 11a1 are formed at intervals in the front-back direction. In addition, in this embodiment, three (or more) rows of first fixing holes 11a1 are formed at intervals in the left-right direction.

[0068] Relative to the first fixing hole 11a1, second fixing holes 11a2 are formed on both sides in the left-right direction. The second fixing holes 11a2 are formed at predetermined positions. There are 6 (or more) second fixing holes 11a2 spaced apart in the front-back direction.

[0069] Figure 6 This is a side view of the first partition 40. Figure 7 This is a side view of the first partition element 41 of the first partition 40. Figure 6 In the image, a portion of the first partition element 41 is represented by a shaded area.

[0070] The first partition 40 is composed of a plurality of first partition elements 41. That is, the first partition elements 41 are components constituting the first partition 40. The plurality of first partition elements 41 are connected in a connected manner to form the first partition 40. The basic structure of each first partition element 41 is the same. However, the shape of the first partition elements 41 may vary depending on the position of the first partition 40. For example, in the first partition elements 41 constituting the ends of the first partition 40, there may be a shape in which a portion other than the ends of the first partition elements 41 is omitted.

[0071] The first partition element 41 is made of a solvent 100 that can be dissolved in a specified solvent ( Figure 13 The material is manufactured from. In this embodiment, the specified solvent 100 is capable of dissolving the adhesive 29 (see reference). Figure 3 The solvent is used for the first partition element 41, which is made of resin, for example.

[0072] The first partition element 41 extends along the upper surface 11a. The first partition element 41 has a curved and undulating shape along the outer peripheral surface of the unit group 20, that is, the outer peripheral surface of the plurality of units 21. The first partition element 41 includes: a main body portion 42 having an elongated shape; a one-end engaging portion 43 formed at one end of the main body portion 42 in the longitudinal direction; and a other-end engaging portion 44 formed at the other end of the main body portion 42 in the longitudinal direction.

[0073] A locking claw 43a is formed at one end of the engaging portion 43. A locking hole 44a for hooking the locking claw 43a is formed at the other end of the engaging portion 44. That is, the engaging portion 43 at the other end of the engaging portion 44 is hooked and connected to another first partition element 41. By repeatedly performing this connection, a first partition 40 extending in a predetermined direction is formed.

[0074] A partition engaging portion 42a is formed on one end of the upper part of the main body 42, on the engaging portion 43 side. The partition engaging portion 42a has a pair of slit grooves 42b and 42c provided in the longitudinal direction and an engaging claw 42d provided between the slit grooves 42b and 42c. The slit grooves 42b and 42c extend downward from the upper end of the main body 42. The engaging claw 42d is a claw-shaped portion with its upper end protruding toward the slit groove 42b side of the slit grooves 42b and 42c.

[0075] A column engaging portion 42e is formed at the lower end of the main body portion 42. The column engaging portion 42e has an engaging hole 42f extending through the thickness direction and engaging claws 42g provided around the engaging hole 42f and protruding along the thickness direction of the main body portion 42. Multiple column engaging portions 42e are formed at intervals along the length direction of the main body portion 42. The column member 60 can engage with the column engaging portion 42e.

[0076] The column member 60 is made of a material that can dissolve in a specified solvent 100. In this embodiment, the column member 60 is made of the same material as the first partition element 41. The column member 60 has a columnar column portion 61 extending in the vertical direction (the length direction of the monomer 21) and a circular plate-shaped base provided at the lower end of the column portion 61 (see reference). Figure 11 62. And a locking part 63 provided at the upper end of the column 61. For example... Figure 11 As shown, the engaging portion 63 of the column member 60 has a portion that enters the engaging hole 42f of the column engaging portion 42e in the first partition element 41, and a portion that hooks onto the engaging claw 42g of the column engaging portion 42e. The column member 60 becomes integral with the first partition element 41 by engaging the engaging portion 63 with the column engaging portion 42e. At this time, the base 62 of the column member 60 is formed to be located below the first partition element 41. The base 62 of the column member 60 is formed to be able to fit into the first fixing hole 11a1 of the bottom part 11.

[0077] A downwardly protruding foot 44b is formed at the other end of the engaging portion 44. The foot 44b forms the lowermost end of the first partition element 41. When the first partition element 41 is disposed on the bottom surface 11, the foot 41b abuts against the upper surface 11a of the bottom surface 11. The vertical length of the first partition element 41, i.e., its height H2 (refer to...) Figure 12 The height H1 formed is greater than that of monomer 21 (refer to) Figure 12 )Low.

[0078] In the first partition element 41, one end engagement portion 43 protrudes to a position lower than the main body portion 42. Additionally, the other end engagement portion 44 protrudes to a position lower than the main body portion 42.

[0079] The main body 42, one-end engaging portion 43, and the other-end engaging portion 44 form an upwardly recessed opening shape. That is, at the lower end of the first partition element 41, a solvent passage space forming portion 45 is formed by the lower edge of the main body 42, etc.

[0080] In addition, at the upper end of the first partition element 41, a solvent-passing space-forming part 46 is formed by the upper edge of the main body part 42.

[0081] Figure 8 This is a side view of the second partition 50. Figure 9 This is a side view of the second partition element 51 of the second partition 50. Figure 8 In the image, a portion of the second partition element 51 is represented by shading.

[0082] The second partition 50 is composed of a plurality of second partition elements 51. That is, the second partition elements 51 are components constituting the second partition 50. The second partition 50 is constructed by connecting the plurality of second partition elements 51 in a connected manner. The basic structure of each second partition element 51 is the same. However, the shape of the second partition elements 51 may vary depending on the position of the second partition 50. For example, in the second partition elements 51 constituting the ends of the second partition 50, a portion other than the ends of the second partition elements 51 may be omitted.

[0083] The second partition element 51 is made of a material that can dissolve in a specified solvent 100. In this embodiment, the second partition element 51 is made of the same material as the first partition element 41. The second partition element 51 extends along the upper surface 11a. The second partition element 51 has a curved and undulating shape along the outer peripheral surface of the monomer group 20, that is, the outer peripheral surface of the plurality of monomers 21. The second partition element 51 has: a main body portion 52 having an elongated shape; a one-end engaging portion 53 formed at one end of the main body portion 52 in the longitudinal direction; and a other-end engaging portion 54 formed at the other end of the main body portion 52 in the longitudinal direction.

[0084] A locking claw 53a is formed in one end of the engaging portion 53. A locking hole 54a for hooking the locking claw 53a is formed in the other end of the engaging portion 54. That is, the engaging portion 53 at the other end of the engaging portion 54 is hooked and connected to another second partition element 51. By repeatedly performing this connection, a second partition 50 extending in a predetermined direction is formed.

[0085] A partition insertion groove 52a extending upward from the lower end of the main body 52 is formed on the side of the engaging portion 53 at the lower part of the main body 52.

[0086] A column engaging portion 52e is formed at the lower end of the main body portion 52. The column engaging portion 52e in this embodiment is formed in the same way as the column engaging portion 42e of the first partition element 41. That is, the column engaging portion 52e has an engaging hole 52f and an engaging claw 52g corresponding to the engaging hole 42f and the engaging claw 42g. Multiple column engaging portions 52e are formed at intervals along the length of the main body portion 52. The column member 60 can engage with the column engaging portion 52e. At this time, the base 62 of the column member 60 is formed to be located below the second partition element 51. The base 62 of the column member 60 is formed to be able to fit into the second fixing hole 11a2 of the bottom portion 11.

[0087] A downwardly protruding foot 52h is formed between the two pillar engagement portions 52e. The foot 52h forms the lowermost end of the second partition element 51. When the second partition element 51 is disposed on the bottom surface 11, the foot 52h abuts against the upper surface 11a of the bottom surface 11.

[0088] A downwardly protruding foot 54b is formed at the other end of the engaging portion 54. The foot 54b forms the lowermost end of the second partition element 51. When the second partition element 51 is disposed on the bottom portion 11, the foot 54b abuts against the upper surface 11a of the bottom portion 11. The vertical length of the second partition element 51 is formed in the same way as that of the first partition element 41. Therefore, the height H2 of the second partition element 51 (refer to...) Figure 12 It forms a height H1 that is lower than that of monomer 21.

[0089] In the second partition element 51, one end engagement portion 53 protrudes to a position lower than the main body portion 52. Additionally, the other end engagement portion 54 protrudes to a position lower than the main body portion 52. Furthermore, the foot portion 52h of the main body portion 42 protrudes downwards.

[0090] The main body 52, the foot 52h of the main body 52, the one-end engaging portion 53, and the other-end engaging portion 54 form an upwardly recessed opening shape. That is, at the lower end of the second partition element 51, a solvent passage space forming portion 55 is formed through the lower edge of the main body 52, etc.

[0091] Figure 10This is a perspective view showing the periphery of the partition engagement part 42a and the partition insertion groove 52a of the grid partition 30. Figure 11 This is a perspective sectional view of the main part of the periphery of the column member 60 of the grid partition 30.

[0092] Next, an example of the assembly method of the grid partition 30 will be described.

[0093] Prepare a predetermined number of first partition elements 41. Engage the other end engagement portion 44 of one first partition element 41 with the engagement portion 43 of another first partition element 41. Repeat this operation to form first partitions 40 extending in a straight line. Similarly, a total of three first partitions 40 are formed (see reference). Figure 5 ).

[0094] Additionally, a predetermined number of second partition elements 51 are prepared. The engaging portion 54 at one end of each second partition element 51 is engaged with the engaging portion 53 at one end of another second partition element 51. This operation is repeated to form second partitions 50 extending in a straight line. Similarly, a total of six second partitions 50 are formed (see reference). Figure 5 ).

[0095] For each first partition 40, the column component 60 engages with the column engaging portion 42e at a predetermined position. Seven column components 60 are engaged relative to each first partition 40 (see reference). Figure 6 ).

[0096] Furthermore, for each second partition 50, the column member 60 engages with the column engaging portions 52e at both ends in the longitudinal direction. Two column members 60 are engaged relative to each second partition 50 (see reference). Figure 8 ).

[0097] Next, a prescribed adhesive is applied to the first fixing hole 11a1 of the bottom surface 11. Then, the pillar member 60 of the first partition 40 is inserted into the first fixing hole 11a1 of the bottom surface 11. After a predetermined time, the pillar member 60 is bonded by the adhesive. Thus, the first partition 40 is fixed to the bottom surface 11 (see reference). Figure 4 Therefore, the first partition 40 can be fixed in a state where it is positioned in the first fixing hole 11a1 via the column member 60. The first partition 40 is arranged at a predetermined interval in the left-right direction.

[0098] Additionally, a prescribed adhesive is applied to the second fixing hole 11a2 of the bottom surface 11. Then, the pillar member 60 of the second partition 50 is inserted into the second fixing hole 11a2 of the bottom surface 11. At this time, the first partition element 41 of the first partition 40 is inserted into the partition insertion groove 52a of the second partition 50. Furthermore, the second partition element 51 of the second partition 50 is inserted into the slit groove 43b of the first partition 40.

[0099] That is, while aligning the position of the partition insertion groove 52a of the second partition 50 with the position of the slit groove 42b of the partition engaging portion 42a of the first partition 40, the second partition 50 is pressed into the bottom part 11. At this time, in the partition engaging portion 42a, the engaging claw 42d elastically deforms and moves towards the slit groove 42c side. Then, when the second partition 50 is further pressed in, the engaging claw 42d engages with the upper end of the second partition 50. Thus, the first partition 40 and the second partition 50 are fitted together as one unit.

[0100] Additionally, after a specified period of time, the column component 60 is bonded and fixed to the bottom surface 11 via adhesive (see reference). Figure 4 Therefore, the second partition 50 can be fixed in a state where it is positioned in the second fixing hole 11a2 via the column member 60. The second partition 50 is arranged at a predetermined interval in the front-rear direction.

[0101] Thus, a grid partition 30, which assembles the first partition 40 and the second partition 50 into one piece, is fixed to the bottom part 11. The upper surface 11a of the bottom part 11 is divided into a grid pattern by the grid partition 30 (see reference). Figure 4 Monomer groups 20 are arranged in the divided areas. In this embodiment, adjacent monomer groups 20 are held in a separated state. The monomer groups 20 are fixed to the upper surface 11a by an adhesive 29.

[0102] Figure 12 This is a diagram showing the relationship between the grid partition 30, the unit 21 and the bottom part 11 in the first embodiment.

[0103] With the grid partition 30 fixed to the bottom surface 11, the feet 44b of the first partition 40 and the feet 52h and 54b of the second partition 50 abut against the upper surface 11a of the bottom surface 11. Meanwhile, the solvent in the first partition 40 separates from the upper surface 11a via the space-forming portion 45 and the solvent in the second partition 50 via the space-forming portion 55. That is, the solvent in the first partition 40 and the solvent in the second partition 50 via the space-forming portion 45 forms a lower solvent passage space (fixed-side solvent passage portion) S1 between themselves and the upper surface 11a.

[0104] Furthermore, with the grid partition 30 fixed to the bottom part 11, the height H2 of the first partition 40 and the second partition 50 is lower than the height H1 of the monomer 21. Between the monomers 21 of adjacent monomer groups 20, an upper solvent passage space (upper solvent passage portion) S2 is formed by the solvent passage space forming portion 46 of the first partition 40 and the solvent passage space forming portion 56 of the second partition 50.

[0105] The lower solvent passage space S1 and the upper solvent passage space S2 are connected on the bottom surface 11 at least in the portion other than the grid partition 30. The solvent passage space S of this embodiment is constituted by including the lower solvent passage space S1 and the upper solvent passage space S2.

[0106] Figure 13 This is an explanatory diagram showing the disassembly of battery cell 1.

[0107] like Figure 13 As shown, the bottom portion 11, integral with monomer 21, is immersed in solvent 100. At this time, solvent 100 moves along the upper surface 11a of the bottom portion 11 through the gaps between monomers 21. In this embodiment, a solvent passage space S is formed by using a grid partition 30. Therefore, solvent 100 can easily pass through the solvent passage space S throughout the entire planar direction (front-back direction, left-right direction) of the upper surface 11a of the bottom portion 11. The solvent passage space S functions as a flow path guiding the flow of solvent 100.

[0108] In this embodiment, when the bottom surface 11 is immersed in solvent 100 for a specified time, the adhesive 29 (refer to...) Figure 3 The monomer 21 is dissolved by solvent 100. Therefore, monomer 21 can be recovered from the bottom surface 11. At this time, in this embodiment, the grid partition 30 and the column member 60 are also dissolved by solvent 100. Therefore, the labor required to disassemble the grid partition 30 and the column member 60 can also be omitted. In addition, the gap between monomers 21 in adjacent monomer groups 20 is further increased, and solvent 100 can more easily spread throughout the entire upper surface 11a.

[0109] In particular, in this embodiment, since the column member 60 can dissolve, the amount of solvent 100 used can be suppressed, for example. That is, even with an amount of solvent 100 sufficient to impregnate the upper surface 11a, the column member 60 and the grid partition 30 impregnated in the solvent 100 are gradually dissolved. Moreover, when the column member 60 dissolves, the upper part of the grid partition 30 moves downward and is immersed in the solvent 100. That is, the grid partition 30 gradually dissolves from the bottom, and the upper part of the grid partition 30 also dissolves. Therefore, dissolution is possible even when the amount of solvent 100 used is suppressed.

[0110] Figure 14 This is an explanatory diagram of the previous monomer group B20.

[0111] Previously, the use of solvent 100 for reuse was not considered for battery cell 1. That is, in conventional cell assembly B20, for example, holes B22a are formed in the block-shaped supports B22 and B23, and cell B21 is assembled through these holes B22a to form cell assembly B20. Therefore, in conventional cell assembly B20, the supports B22 and B23 are block-shaped, and it is difficult to create gaps between the cells B21. Consequently, even if solvent 100 were used to dissolve them in conventional cell assembly B20, the supports B22 and B23 are difficult to dissolve, and the dissolution process using solvent 100 requires labor and time.

[0112] In contrast, in this embodiment, a solvent passage space S, which functions as a flow path for the solvent 100, is formed by using a grid separator 30 with solvent passage space forming portions 45, 46, 55, and 56. Therefore, in this embodiment, the grid separator 30 allows for the arrangement of the cell group 20 in predetermined partitions on the upper surface 11a of the bottom portion 11, and during recycling, the adhesive 29 and the grid separator 30 are easily dissolved by immersion in the solvent 100. Therefore, in this embodiment, the labor and time required for dissolution can be reduced, thus reducing the labor and time required for recycling components of the battery cell 1, such as the cell 21, and facilitating the reuse of the cell 21.

[0113] As described above, according to the first embodiment of the present invention, a battery cell 1 is provided, which has a plurality of cells 21 and a battery case 3 that houses the plurality of cells 21 and has an upper surface 11a on which the plurality of cells 21 are fixed. The battery cell 1 has a first separator 40 and a second separator 50 disposed between the cells 21 and extending from the upper surface 11a along the length direction of the cells 21. A solvent passage space S is formed along the planar direction of the upper surface 11a, through which a solvent 100 for dissolving the first separator 40 and the second separator 50 can pass.

[0114] According to this structure, since a solvent passage space S is formed, processing can be performed using solvent 100. Furthermore, through the solvent passage space S, solvent 100 easily spreads along the planar direction of the upper surface 11a of the battery casing 3, thus shortening the time required to dissolve the components in the battery cell 1. Therefore, labor and time for component recycling can be reduced, providing a battery cell 1 where the components are easily reusable. Moreover, this further helps to significantly reduce waste generation.

[0115] In this embodiment, the height H2 of the first partition 40 and the second partition 50 is lower than the height H1 of the monomer 21, and the solvent passage space S includes an upper solvent passage space S2 formed at a position above the first partition 40 and the second partition 50.

[0116] According to this structure, the solvent 100 can easily pass over the first separator 40 and the second separator 50 and cover the entire planar direction of the upper surface 11a of the battery case 3. Therefore, the time for dissolving the target component in the battery cell 1 can be shortened.

[0117] In addition, in this embodiment, the solvent passage space S includes the lower solvent passage space S1 formed between the first separator 40, the second separator 50 and the battery case 3.

[0118] According to this structure, the solvent 100 can pass between the first separator 40, the second separator 50 and the battery case 3, thus easily spreading the solvent 100 throughout the entire planar direction of the upper surface 11a of the battery case 3. Therefore, the time for dissolving the target component in the battery cell 1 can be shortened.

[0119] In addition, in this embodiment, within the length of the first partition 40 and the second partition 50, in other words, within the length of the first partition 40 and the second partition 50, a column member 60 is provided that is fixed to the battery case 3 and supports the first partition 40 and the second partition 50.

[0120] According to this structure, the gap between the first separator 40, the second separator 50 and the battery case 3 can be ensured, and the first separator 40 and the second separator 50 can be firmly fixed to the battery case 3.

[0121] [Second Implementation]

[0122] A second embodiment of the present invention will be described. In this second embodiment, parts that are constructed in the same way as those in the first embodiment are labeled with the same reference numerals and their descriptions are omitted.

[0123] Figure 15 This is a diagram showing the relationship between the grid partition 230, the unit 21 and the bottom part 11 in the second embodiment. Figure 15 Corresponding to the first embodiment Figure 12 .

[0124] The grid partition 230 of the second embodiment has a first partition 240 and a second partition 250 instead of the first partition 40 and the second partition 50 in the first embodiment.

[0125] The first partition 240 and the second partition 250 have through holes 42i and 52i formed in the main body portions 42 and 52 in the thickness direction, which is different from the first partition 40 and the second partition 50 in the first embodiment.

[0126] Holes 42i and 52i are connected to the solvent passage space S. That is, the porous solvent passage space (hole portion) S3 is formed through holes 42i and 52i. The solvent passage space S of this embodiment is constituted by the lower solvent passage space S1, the upper solvent passage space S2, and the porous solvent passage space S3.

[0127] In this embodiment, a solvent passage space S is also formed by using a grid partition 230, allowing the solvent 100 to easily pass through the solvent passage space S and spread throughout the entire planar direction of the upper surface 11a of the bottom part 11. Therefore, in this embodiment, the labor and time required for recycling the monomer 21 can be reduced, and the reuse of the monomer 21 becomes easier.

[0128] In addition, in this embodiment, the solvent passage space S includes a solvent passage space S3 through a hole that passes through the first partition 240 and the second partition 250.

[0129] According to this structure, the spaces divided by the first separator 240 and the second separator 250 can be interconnected by the solvent passing through the pores in space S3, thus allowing the solvent 100 to easily spread throughout the entire planar direction of the upper surface 11a of the battery case 3. Therefore, the time required to dissolve the target component in the battery cell 1 can be shortened.

[0130] [Third Implementation Method]

[0131] A third embodiment of the present invention will be described. In this third embodiment, parts that are configured in the same way as those in the first or second embodiment described above are labeled with the same reference numerals and their descriptions are omitted.

[0132] Figure 16 This is a diagram showing the relationship between the grid partition 330, the unit 21 and the bottom part 11 in the third embodiment. Figure 16 Corresponding to the first embodiment Figure 12 .

[0133] The grid partition 330 of the third embodiment has a first partition 340 and a second partition 350 instead of the first partition 40 and the second partition 50 of the first embodiment.

[0134] In the first partition 340 and the second partition 350, the slits 42j and 52j extending in the vertical direction are formed in the main body portions 42 and 52, which is different from the first partition 40 and the second partition 50 in the first embodiment.

[0135] The first partition 340 is separated in the longitudinal direction by a slit 42j. The first partition 340 extends in the front-to-back direction, separating the gap formed by the slit 42j. Furthermore, the second partition 350 is separated in the longitudinal direction by a slit 52j. The second partition 350 extends in the left-to-right direction, separating the gap formed by the slit 52j.

[0136] Slits 42j and 52j are connected to the solvent through space S. That is, slits 42j and 52j form a space (spacing) S4 through which the solvent passes.

[0137] The solvent passage space S in this embodiment includes the lower solvent passage space S1, the upper solvent passage space S2, and the spacer solvent passage space S4.

[0138] In this embodiment, a solvent passage space S is also formed by using a grid partition 330. Therefore, the solvent 100 can easily pass through the solvent passage space S and spread throughout the entire planar direction of the upper surface 11a of the bottom part 11. Therefore, in this embodiment, the labor and time required for recycling the monomer 21 can also be reduced, and the reuse of the monomer 21 becomes easier.

[0139] In addition, in this embodiment, the components of the first partition 340 and the second partition 350 are arranged to be separated by a solvent passage space S4 in the length direction of the first partition 340 and the second partition 350, and the solvent passage space S includes the solvent passage space S4.

[0140] According to this structure, the space divided by the first separator 340 and the second separator 350 can be connected to each other through the space S4 by the solvent between the first separator 340 and the second separator 350, so that the solvent 100 can cover the entire planar direction of the upper surface 11a of the battery case 3. Therefore, the time for dissolving the target component in the battery cell 1 can be shortened.

[0141] [Other Implementation Methods]

[0142] The above-described embodiments are merely one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

[0143] In the above embodiments, the adhesive 29, the first partitions 40, 240, 340, the second partitions 50, 250, 350, and the column component 60 are preferably manufactured to be soluble in the same solvent 100, but they may also be manufactured to be soluble in different solvents. That is, the first partitions 40, 240, 340, the second partitions 50, 250, 350, and the column component 60 may also be made of different materials.

[0144] In the second and third embodiments described above, a structure is described in which any one of the holes 42i, 52i and the slits 42j, 52j is provided in the first partition 240, 340 and the second partition 250, 350, but both holes 42i, 52i and slits 42j, 52j may be provided.

[0145] [Structure supported by the above embodiments]

[0146] The above implementation supports the following structures.

[0147] (Structure 1) A battery comprising: a plurality of battery cells; and a housing that houses the plurality of battery cells and has a fixing surface on which the plurality of battery cells are fixed, characterized in that the battery comprises a separator disposed between the battery cells and extending from the fixing surface along the length direction of the battery cells, and having a solvent passage portion formed in a planar direction along the fixing surface for a solvent that dissolves the separator to pass through.

[0148] According to this structure, since a solvent passage is formed, processing with a solvent is possible. Furthermore, through the solvent passage, the solvent easily spreads along the planar direction of the fixed surface of the casing, thus shortening the time required to dissolve the components in the battery. Therefore, labor and time can be reduced during component recycling, providing a battery in which the reuse of components is very easy.

[0149] (Structure 2) In the battery of Structure 1, the separator is characterized in that the height of the separator is lower than the height of the battery cell, and the solvent passage includes an upper solvent passage formed at a position above the separator.

[0150] According to this structure, the solvent can easily cross the separator and spread throughout the entire planar direction of the fixed surface of the casing. Therefore, the time required to dissolve the target component in the battery can be shortened.

[0151] (Structure 3) In the battery of Structure 1 or 2, the solvent passage includes a fixed-side solvent passage formed between the separator and the housing.

[0152] This structure allows solvent to pass between the separator and the casing, thus easily distributing the solvent throughout the entire planar direction of the fixed surface of the casing. Therefore, the time required to dissolve the target component in the battery can be shortened.

[0153] (Structure 4) In the battery of any one of Structures 1 to 3, the solvent passage includes a hole through the separator.

[0154] According to this structure, the spaces divided by the separators can be interconnected through the holes, thus allowing the solvent to easily spread throughout the entire planar direction of the fixed surface of the casing. Therefore, the time required to dissolve the target component in the battery can be shortened.

[0155] (Composition 5) In a battery of any one of structures 1 to 4, the separator is characterized in that the separator is arranged at intervals along its length, and the solvent passage includes the intervals.

[0156] According to this structure, the spaces divided by the separators can be interconnected through the spacing of the separators, thus allowing the solvent to spread throughout the entire planar direction of the fixed surface of the casing. Therefore, the time required to dissolve the target component in the battery can be shortened.

[0157] (Structure 6) In the battery of any one of Structures 1 to 5, a column member is provided within the length direction of the separator, the column member being fixed to the housing and supporting the separator.

[0158] This structure ensures the gap between the partition and the shell, and firmly fixes the partition to the shell.

Claims

1. A battery having a plurality of battery cells, and a case that houses the plurality of battery cells and has a fixing surface on which the plurality of battery cells are fixed, characterized in that the battery has a separator that is disposed between the battery cells and extends in a length direction of the battery cells from the fixing surface, and a solvent passing portion that is formed in a planar direction of the fixing surface and through which a solvent that dissolves the separator is able to pass.

2. The battery according to claim 1, characterized in that a height of the separator is lower than a height of the battery cells, and the solvent passing portion includes an upper solvent passing portion that is formed at a position higher than the separator.

3. The battery according to claim 1 or 2, characterized in that the solvent passing portion includes a fixing side solvent passing portion that is formed between the separator and the case.

4. The battery according to claim 1 or 2, characterized in that the solvent passing portion includes a hole portion that penetrates the separator.

5. The battery according to claim 1 or 2, characterized in that the separator is disposed at intervals in a length direction of the separator, and the solvent passing portion includes the intervals.

6. The battery according to claim 1 or 2, characterized in that a pillar member is provided within a range of the length direction of the separator, the pillar member is fixed to the case and supports the separator. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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