Battery pack and method for detaching battery module

Abstract

A battery pack (10) is provided with a housing body (200) and a battery module (100) housed in the housing body (200). The battery module (100) defines a left screw hole (132) and a right screw hole (134) that overlap at least a part of the housing body (200).

Description

Technical Field

[0001] The present invention relates to a battery pack and a method for disassembling a battery module. Background Art

[0002] In recent years, various battery packs having a plurality of battery modules have been developed. For example, in the battery module described in Patent Document 1, the battery module is fixed to a housing. In this battery module, a heat conduction member is provided between the battery module and the housing. The heat conduction member is formed by coating.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: WO 2017 / 47211 Summary of the Invention

[0006] -Problems to be Solved by the Invention-

[0007] For example, in the battery pack described in Patent Document 1, it is sometimes necessary to disassemble the battery module from the housing. However, it is sometimes difficult to improve the workability of disassembling the battery module from the housing only by lifting the battery module from the housing. For example, the battery module itself may be relatively heavy. In this case, it may be difficult to lift the battery module. In addition, when the battery module and the housing are joined via a heat conduction member, it may be difficult to peel the battery module from the housing.

[0008] An example of the object of the present invention is to improve the workability of disassembling the battery module from the housing. Other objects of the present invention will become clear from the description of this specification.

[0009] -Means for Solving the Problems-

[0010] One aspect of the present invention is as follows.

[0011] [1] A battery pack, comprising: a housing; and a battery module housed in the housing, the battery module defining a screw hole that overlaps at least a part of the housing.

[0012] [2] The battery pack according to [1], wherein the screw hole is located in at least one of a substantially central portion of the battery module in a direction substantially parallel to a direction in which the screw hole penetrates the battery module and a portion of the battery module that deviates from the substantially central portion toward the side where the screw hole is located from the side where at least a part of the housing is located.

[0013] [3] The battery pack according to [1], wherein the screw hole is located in a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw hole penetrates the battery module.

[0014] [4] The battery pack according to any one of [1] to [3], wherein at least two of the screw holes are provided in regions on opposite sides of the battery module.

[0015] [5] The battery pack according to any one of [1] to [4], wherein at least a part of the housing has at least a part of a frame that surrounds at least a part of the battery module.

[0016] [6] A method for disassembling a battery module, comprising the following steps: screwing a through member into a screw hole of the battery module housed in a housing; and further screwing the through member into the screw hole in a state where at least a part of the through member and at least a part of the housing overlapping the screw hole are in contact with each other.

[0017] [7] The method for disassembling a battery module according to [6], wherein the screw hole is located in at least one of a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw hole penetrates the battery module and a portion that deviates from the substantially central portion of the battery module from the side where at least a part of the housing is located toward the side where the screw hole is located.

[0018] [8] The method for disassembling a battery module according to [6], wherein the screw hole is located in a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw hole penetrates the battery module.

[0019] [9] The method for disassembling a battery module according to any one of [6] to [8], wherein at least two of the screw holes are provided in regions on opposite sides of the battery module.

[0020]

[10] The method for disassembling a battery module according to any one of [6] to [9], wherein at least a part of the housing has at least a part of a frame that surrounds at least a part of the battery module.

[0021]

[11] The method for disassembling a battery module according to any one of [6] to

[10] , further comprising the following step: pulling up the battery module by pulling up the through member in a state where the through member is screwed into the screw hole.

[0022] -Advantageous Effects of the Invention-

[0023] According to the above-described aspect of the present invention, the workability of disassembling the battery module from the housing can be improved. Brief Description of the Drawings

[0024] Figure 1 is a perspective view of the battery pack related to the embodiment.

[0025] Figure 2 is a top view of the state in which the upper case is removed from the battery pack related to the embodiment.

[0026] Figure 3 is a top view of the battery module related to the embodiment.

[0027] Figure 4 is Figure 3 a cross-sectional view taken along line A-A of

[0028] Figure 5 is a view for explaining an example of a method for removing the battery module from the lower case.

[0029] Figure 6 is a view for explaining an example of a method for removing the battery module from the lower case. Detailed Embodiment

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are assigned to the same structural elements, and redundant explanations will be omitted as appropriate.

[0031] Figure 1 is a perspective view of the battery pack 10 related to the embodiment. Figure 2 is a top view of the state after removing the upper case 220 from the battery pack 10 related to the embodiment.

[0032] In the embodiment, the battery pack 10 is mounted on an automobile. Specifically, the battery pack 10 is mounted between the front wheels and the rear wheels of the automobile. Hereinafter, unless otherwise specified, it is assumed that the battery pack 10 is mounted on an automobile for explanation. However, the battery pack 10 can also be applied to uses other than automobiles.

[0033] In each figure, for the sake of explanation, the X direction, the Y direction, and the Z direction are shown. The X direction represents the front-rear direction of the battery pack 10. The Y direction is orthogonal to the X direction. The Y direction represents the left-right direction of the battery pack 10. The Z direction is orthogonal to both the X direction and the Y direction. The Z direction represents the up-down direction of the battery pack 10. The arrow indicating the X direction, the arrow indicating the Y direction, and the arrow indicating the Z direction respectively represent the front direction, the left direction, and the up direction of the battery pack 10. In Figure 2 the white circle with a black dot indicating the Z direction indicates that the arrow indicating the Z direction extends from the back side of the paper surface toward the front. However, the relationship between the X direction, the Y direction, and the Z direction and the front-rear direction, the left-right direction, and the up-down direction of the battery pack 10 is not limited to this example.

[0034] In an embodiment, the front-back direction, left-right direction, and up-down direction of the battery pack 10 are determined by the vehicle on which the battery pack 10 is mounted. The X-direction, Y-direction, and Z-direction respectively represent the front-back direction, left-right direction, and up-down direction of the vehicle. The arrow indicating the X-direction, the arrow indicating the Y-direction, and the arrow indicating the Z-direction respectively represent the front direction, left direction, and up direction of the vehicle. However, the relationship between the front-back direction, left-right direction, and up-down direction of the battery pack 10 and the front-back direction, left-right direction, and up-down direction of the vehicle is not limited to this example.

[0035] Hereinafter, as needed, the direction perpendicular to the Z-direction is referred to as the horizontal direction.

[0036] The battery pack 10 includes four battery modules 100 and a housing 200. The four battery modules 100 include a pair of left battery modules 100 arranged in the X-direction and a pair of right battery modules 100 arranged in the X-direction. The housing 200 has a lower housing 210 and an upper housing 220. The lower housing 210 is sometimes generally referred to as, for example, a tray or a main body portion. The lower housing 210 includes a lower plate 212 and side frames 214. The upper housing 220 is sometimes generally referred to as, for example, a cover or a lid portion. As will be described later, each battery module 100 has a plurality of battery cells 102.

[0037] A pair of terminals 104 are provided in front of the side frames 214. The pair of terminals 104 are arranged substantially parallel to each other in the Y-direction. The front end portions of the respective terminals 104 protrude forward from the front surface of the side frames 214. In the electrical path, between the pair of terminals 104, the four battery modules 100 are connected in series.

[0038] The lower housing 210 and the upper housing 220 are mounted to each other via a seal 230. The lower housing 210, the upper housing 220, and the seal 230 form a housing space 250. The four battery modules 100 are housed in the housing space 250.

[0039] The lower plate 212 defines the bottom of the housing space 250. The side frames 214 define the side portions of the housing space 250. Specifically, when viewed from the Z-direction, the side frames 214 are provided along the outermost periphery of the lower plate 212. The upper housing 220 defines the top of the housing space 250.

[0040] The seal 230 is an elastic member such as rubber, for example. When viewed from the Z-direction, the seal 230 is provided over the entire circumference of the side frames 214. Thus, when viewed from the Z-direction, the seal 230 surrounds the housing space 250. Therefore, the housing space 250 can be sealed from the space outside the housing 200 by the seal 230.

[0041] The number and configuration of the battery modules 100 are not limited to the examples described in the embodiments. For example, the number of battery modules 100 may also be only two, only three, or five or more.

[0042] Figure 3 is a top view of the battery module 100 according to the embodiment. Figure 4 is Figure 3 A - A cross - sectional view of. In Figure 4 it, the white circle with X indicating the X - direction represents that the arrow indicating the X - direction extends from the near side of the paper surface toward the inside.

[0043] As Figure 4 shown, the battery module 100 has a single - cell laminate 102G and a housing 110.

[0044] The single - cell laminate 102G includes a plurality of battery cells 102. In Figure 4 the example shown, the plurality of battery cells 102 are stacked substantially parallel to the Y - direction. For example, in the single - cell laminate 102G, a plurality of battery - cell groups each including a plurality of battery cells 102 connected in parallel are connected in series. Alternatively, a plurality of single battery cells 102 may be connected in series.

[0045] The housing 110 houses the single - cell laminate 102G. The housing 110 includes a left cover 112, a right cover 114, a lower cover 116, an upper cover 118, a front cover (not shown), and a rear cover (not shown). The left cover 112 covers the left side surface of the single - cell laminate 102G. The right cover 114 covers the right side surface of the single - cell laminate 102G. The lower cover 116 covers the lower surface of the single - cell laminate 102G via a thermally conductive adhesive 116a. The upper cover 118 covers the upper surface of the single - cell laminate 102G. The front cover (not shown) covers the front surface of the single - cell laminate 102G. The rear cover (not shown) covers the rear surface of the single - cell laminate 102G.

[0046] The lower plate 212 includes an upper cooling plate 212a and a lower cooling plate 212b. The upper cooling plate 212a and the lower cooling plate 212b overlap in the Z - direction. The refrigerant 212c flows in the region between the lower surface of the upper cooling plate 212a and the upper surface of the lower cooling plate 212b. The refrigerant 212c is, for example, a liquid such as water.

[0047] The lower housing 210 includes a support frame 216. When viewed from the Z - direction, the support frame 216 forms an enclosure surrounding at least a part of the single - cell laminate 102G. The support frame 216 is provided on the upper surface of the upper cooling plate 212a. Hereinafter, as needed, the part of the support frame 216 located on the left side of the single - cell laminate 102G is referred to as the left support portion 216a. Hereinafter, as needed, the part of the support frame 216 located on the right side of the single - cell laminate 102G is referred to as the right support portion 216b.

[0048] A left protrusion 122 is provided on the left outer side surface of the left cover 112. The left protrusion 122 protrudes toward the left of the left cover 112. The left protrusion 122 is disposed on the upper surface of the left support portion 216a. The left protrusion 122 and the left support portion 216a are fastened to each other by a plurality of left bolts 162. As Figure 3 shown, the plurality of left bolts 162 are arranged substantially parallel to each other in the X direction. However, the number and arrangement of the left bolts 162 are not limited to Figure 3 the example shown. For example, the left protrusion 122 and the left support portion 216a may be fastened to each other by only a single left bolt 162.

[0049] A right protrusion 124 is provided on the right outer side surface of the right cover 114. The right protrusion 124 protrudes toward the right of the right cover 114. The right protrusion 124 is disposed on the upper surface of the right support portion 216b. The right protrusion 124 and the right support portion 216b are fastened to each other by a plurality of right bolts 164. As Figure 3 shown, the plurality of right bolts 164 are arranged substantially parallel to each other in the X direction. However, the number and arrangement of the right bolts 164 are not limited to Figure 3 the example shown. For example, the right protrusion 124 and the right support portion 216b may be fastened to each other by only a single right bolt 164.

[0050] The battery module 100 is mounted on the lower plate 212 via a filler 150. The filler 150 is disposed between the lower surface of the lower cover 116 and the upper surface of the upper cooling plate 212a. The filler 150 is compressed in the Z direction by the lower surface of the lower cover 116 and the upper surface of the upper cooling plate 212a.

[0051] In the embodiment, the filler 150 is a thermally conductive adhesive. Therefore, the lower surface of the lower cover 116 and the upper surface of the upper cooling plate 212a are physically joined via the filler 150. Therefore, compared with the case where the filler 150 is not provided, it is difficult for the lower cover 116 and the upper cooling plate 212a to deviate from each other. Further, the lower surface of the lower cover 116 and the upper surface of the upper cooling plate 212a are thermally joined via the filler 150. Therefore, compared with the case where the filler 150 is not provided, the heat generated in the battery module 100 can be easily dissipated to the lower housing 210 via the thermally conductive adhesive 116a, the lower cover 116, and the filler 150.

[0052] Figure 5 and Figure 6 are diagrams for explaining an example of a method for detaching the battery module 100 from the lower housing 210. Hereinafter, the method for detaching the battery module 100 from the lower housing 210 is referred to as the detachment method of the battery module 100 as needed. Referring to Figure 5 and Figure 3, an example of a method for disassembling the battery module 100 is described.

[0053] As Figure 5 shown, the left protrusion 122 defines the left screw hole 132. The left screw hole 132 penetrates the left protrusion 122 substantially parallel to the Z direction. The left screw hole 132 overlaps with the left support portion 216a in the Z direction. The left protrusion 122 and the left screw hole 132 are located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction. The right protrusion 124 defines the right screw hole 134. The right screw hole 134 penetrates the right protrusion 124 substantially parallel to the Z direction. The right screw hole 134 overlaps with the right support portion 216b in the Z direction. The left screw hole 132 and the right screw hole 134 are located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction.

[0054] The substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction means the portion of the battery module 100 in a direction substantially parallel to the Z direction that is located at a substantially equal distance from the lower surface of the lower cover 116 and the upper surface of the upper cover 118. The substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction includes not only the strict central portion of the battery module 100 in a direction substantially parallel to the Z direction, but also the portion of the battery module 100 in a direction substantially parallel to the Z direction that deviates from the strict central portion by a given distance in the Z direction. The given distance is a range that those skilled in the art will understand can achieve the intended purpose through the central portion of the battery module 100 in a direction substantially parallel to the Z direction. For example, the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction may also deviate from the strict central portion of the battery module 100 in a direction substantially parallel to the Z direction by a distance of 10% or less, 7.5% or less, or 5.0% or less of the Z-direction dimension of the battery module 100 in the Z direction.

[0055] The left eye bolt 172 can be inserted into the left screw hole 132. Specifically, the left eye bolt 172 can be screwed into the left screw hole 132. As described above, the left protrusion 122 and the left screw hole 132 are located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction. Therefore, compared with the case where the left protrusion 122 and the left screw hole 132 deviate downward from the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, the accessibility of the left eye bolt 172 to the left screw hole 132 from above the left protrusion 122 can be improved, and the workability of disassembling the battery module 100 can be improved. In addition, compared with the case where the left protrusion 122 and the left screw hole 132 deviate upward from the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, it is possible to easily ensure a wiring space for wiring such as a bus bar and a wire harness above the left protrusion 122. Therefore, when the left protrusion 122 and the left screw hole 132 are located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, it is possible to easily balance the workability of disassembling the battery module 100 and the ease of ensuring a wiring space for wiring.

[0056] The right eye bolt 174 can be inserted into the right screw hole 134. Specifically, the right eye bolt 174 can be screwed into the right screw hole 134. As described above, the right protrusion 124 and the right screw hole 134 are located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction. Therefore, compared with the case where the right protrusion 124 and the right screw hole 134 are located below the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, the accessibility of the right eye bolt 174 to the right screw hole 134 from above the right protrusion 124 can be improved, and the workability of disassembling the battery module 100 can be improved. In addition, compared with the case where the right protrusion 124 and the right screw hole 134 deviate upward from the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, it is possible to easily ensure a wiring space for wiring such as a bus bar and a wire harness above the right protrusion 124. Therefore, when the right protrusion 124 and the right screw hole 134 are located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, it is possible to easily balance the workability of disassembling the battery module 100 and the ease of ensuring a wiring space for wiring.

[0057] In Figure 5In the example shown, with the left bolt 162 previously removed from the left projection 122 and the left support portion 216a, the left eyebolt 172 is screwed into the left screw hole 132 from above the left projection 122. The lower end of the left eyebolt 172 penetrates the left screw hole 132 and contacts the upper surface of the left support portion 216a. Similarly, with the right bolt 164 previously removed from the right projection 124 and the right support portion 216b, the right eyebolt 174 is screwed into the right screw hole 134 from above the right projection 124. As a result, the lower end of the right eyebolt 174 penetrates the right screw hole 134 and contacts the upper surface of the right support portion 216b.

[0058] Next, in Figure 5 the example shown, with the lower end of the left eyebolt 172 in contact with the upper surface of the left support portion 216a, the left eyebolt 172 is further screwed into the left screw hole 132. By further tightening (i.e., screwing in) the left eyebolt 172 while its lower end is in contact with the upper surface of the left support portion 216a, the left projection 122 floats upward relative to the left support portion 216a. That is, the left screw hole 132 and the left eyebolt 172 form at least a part of a screw jack that causes the left projection 122 to float upward relative to the left support portion 216a. In addition, in Figure 5 the example shown, with the lower end of the right eyebolt 174 in contact with the upper surface of the right support portion 216b, the right eyebolt 174 is further screwed into the right screw hole 134. By further tightening (i.e., screwing in) the right eyebolt 174 while its lower end is in contact with the upper surface of the right support portion 216b, the right projection 124 floats upward relative to the right support portion 216b. That is, the right screw hole 134 and the right eyebolt 174 form at least a part of a screw jack that causes the right projection 124 to float upward relative to the right support portion 216b. Thereby, the lower surface of the lower cover 116 can be easily peeled upward from the packing 150.

[0059] In an embodiment, compared with the case of merely lifting the battery module 100 from the lower housing 210, the workability of detaching the battery module 100 from the lower housing 210 can be improved. Specifically, in the embodiment, the battery module 100 can be floated from the lower housing 210 by the left lifting eye bolt 172 and the right lifting eye bolt 174. Therefore, compared with the case of merely lifting the battery module 100 from the lower housing 210, the battery module 100 can be easily floated from the lower housing 210. In particular, in the embodiment, even when the battery module 100 itself is relatively heavy, compared with the case of merely lifting the battery module 100 from the lower housing 210, the battery module 100 can be easily floated from the lower housing 210. Furthermore, in the embodiment, even when the lower surface of the lower cover 116 and the upper surface of the upper cooling plate 212a are joined to each other via the packing 150, the lower surface of the lower cover 116 can be easily peeled off from the packing 150 upward by the left lifting eye bolt 172 and the right lifting eye bolt 174.

[0060] In an embodiment, the left lifting eye bolt 172 and the right lifting eye bolt 174 penetrate the left protrusion 122 and the right protrusion 124 in the Z direction via the left screw hole 132 and the right screw hole 134, respectively. Therefore, by increasing the rigidity of each of the left protrusion 122 and the right protrusion 124, the load applied to the battery cell 102 and the housing 110 when the battery module 100 is lifted by the left lifting eye bolt 172 and the right lifting eye bolt 174 and the battery module 100 is peeled off from the packing 150 can be reduced. Therefore, in the embodiment, reinforcement for reducing the load applied to the battery cell 102 and the housing 110 when the battery module 100 is lifted and the battery module 100 is peeled off from the packing 150 is not required.

[0061] In an embodiment, when the battery module 100 is lifted by the left lifting ring bolt 172 and the right lifting ring bolt 174, the lower ends of the left lifting ring bolt 172 and the right lifting ring bolt 174 are respectively in contact with the upper surfaces of the left support portion 216a and the right support portion 216b. Assume that in a state where the left support portion 216a and the right support portion 216b are not provided on the lower plate 212, when the lower ends of the left lifting ring bolt 172 and the right lifting ring bolt 174 are in contact with the upper surface of the lower plate 212 and the battery module 100 is lifted, if the thickness of the lower plate 212 in the Z direction is relatively thin, the lower plate 212 may be deformed due to the forces received from the lower ends of the left lifting ring bolt 172 and the right lifting ring bolt 174. Or, if a reinforcing member such as a rib is provided at a portion of the upper surface of the lower plate 212 that is in contact with the lower ends of the left lifting ring bolt 172 and the right lifting ring bolt 174 in order to prevent the deformation of the lower plate 212, the cost of the lower plate 212 may increase. In contrast, in the embodiment, even if the thickness of the lower plate 212 in the Z direction is relatively thin, the deformation of the lower plate 212 can be suppressed by the forces received from the lower ends of the left lifting ring bolt 172 and the right lifting ring bolt 174 when the battery module 100 is lifted, and the necessity of providing the above-mentioned reinforcing member on the upper surface of the lower plate 212 can be eliminated.

[0062] As Figure 3 shown, two left screw holes 132 are provided in the left protrusion 122. In addition, two right screw holes 134 are provided in the right protrusion 124. That is, the two left screw holes 132 and the two right screw holes 134 are provided in regions on opposite sides of the battery module 100 in the Y direction. In addition, the left screw holes 132 and the right screw holes 134 are located at substantially the same height in the Z direction. In this case, compared with the case where screw holes are provided only in one region of the battery module 100 in the Y direction and the case where the left screw holes 132 and the right screw holes 134 are located at different heights in the Z direction, the battery module 100 can be easily detached from the lower housing 210. However, the screw holes may be provided only in one region of the battery module 100 in the Y direction. In addition, the left screw holes 132 and the right screw holes 134 may be located at different heights in the Z direction.

[0063] The two left screw holes 132 are arranged on opposite sides of each other in the X direction with respect to the center of the left protrusion 122 in the X direction. Therefore, compared with the case where only one left screw hole 132 is provided in the left screw holes 132, the left protrusion 122 can be easily lifted from the left support portion 216a. Similarly, the two right screw holes 134 are arranged on opposite sides of each other in the X direction with respect to the center of the right protrusion 124 in the X direction. Therefore, compared with the case where only one right screw hole 134 is provided in the right screw holes 134, the right protrusion 124 can be easily lifted from the right support portion 216b. However, only one left screw hole 132 may be provided in the left protrusion 122. Similarly, only one right screw hole 134 may be provided in the right protrusion 124.

[0064] In the embodiment, as the through members that are screwed into the left screw holes 132 and the right screw holes 134 to lift the battery module 100 from the lower housing 210, left eyebolts 172 and right eyebolts 174 are used. Therefore, compared with the case of using ordinary bolts, as Figure 6 shown, it is possible to easily hook a pulling member 180 such as a wire on the ring hooks of the heads of the left eyebolt 172 and the right eyebolt 174 respectively. As Figure 6 shown, in a state where the left eyebolt 172 and the right eyebolt 174 are respectively screwed into the left screw holes 132 and the right screw holes 134, the left eyebolt 172 and the right eyebolt 174 are pulled up by the pulling member 180, whereby the battery module 100 can be lifted. Further, in the embodiment, as described above, the left protrusion 122, the right protrusion 124, the left screw holes 132, and the right screw holes 134 are located in a substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction. Therefore, compared with the case where the left protrusion 122, the right protrusion 124, the left screw holes 132, and the right screw holes 134 deviate from the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction toward the Z direction, the pulling member 180 can be hooked on the center of gravity of the battery module 100 in the Z direction or its vicinity, and the battery module 100 can be stably lifted by the pulling member 180. However, the through members that are screwed into the left screw holes 132 and the right screw holes 134 to lift the battery module 100 from the lower housing 210 are not limited to eyebolts. For example, ordinary bolts may also be used. In addition, the method of mounting the pulling member 180 to the left eyebolt 172 and the right eyebolt 174 is not limited to hooking. In addition, the method of pulling up the left eyebolt 172 and the right eyebolt 174 is not limited to the method using the pulling member 180. For example, the left eyebolt 172 and the right eyebolt 174 may be pulled up by the operator's hand.

[0065] The left protrusion 122, the right protrusion 124, the left screw hole 132, and the right screw hole 134 may not be located in the substantially central portion of the battery module 100 in a direction substantially parallel to the Z direction, but may be located in a portion of the battery module 100 that deviates upward from the substantially central portion. When the left protrusion 122 and the left screw hole 132 are located in a portion of the battery module 100 that deviates upward from the substantially central portion, compared with the case where the left protrusion 122 and the left screw hole 132 are located in a portion of the battery module 100 that deviates downward from the substantially central portion, the accessibility of the left eyebolt 172 from above the left protrusion 122 to the left screw hole 132 can be improved, and the workability of disassembling the battery module 100 can be improved. When the right protrusion 124 and the right screw hole 134 are located in a portion of the battery module 100 that deviates upward from the substantially central portion, compared with the case where the right protrusion 124 and the right screw hole 134 are located in a portion of the battery module 100 that deviates downward from the substantially central portion, the accessibility of the right eyebolt 174 from above the right protrusion 124 to the right screw hole 134 can be improved, and the workability of disassembling the battery module 100 can be improved.

[0066] As described above, the embodiments of the present invention have been described with reference to the drawings, but these are examples of the present invention, and various structures other than the above can also be adopted.

[0067] This application claims priority based on Japanese Patent Application No. 2022-178020 filed on November 7, 2022, and incorporates the entire disclosure thereof herein.

[0068] -Description of Reference Numerals-

[0069] 10: Battery pack, 100: Battery module, 102: Battery cell, 102G: Monomer laminate, 104: Terminal, 110: Housing case, 112: Left cover, 114: Right cover, 116: Lower cover, 116a: Thermally conductive adhesive, 118: Upper cover, 122: Left protrusion, 124: Right protrusion, 132: Left screw hole, 134: Right screw hole, 150: Filler, 162: Left bolt, 164: Right bolt, 172: Left eyebolt, 174: Right eyebolt, 180: Upper pulling member, 200: Housing body, 210: Lower housing, 212: Lower plate, 212a: Upper cooling plate, 212b: Lower cooling plate, 212c: Refrigerant, 214: Side frame, 216: Support frame, 216a: Left support portion, 216b: Right support portion, 220: Upper housing, 230: Seal, 250: Housing space.

Claims

1. A battery pack, characterized in that, it includes: a housing; and a battery module housed in the housing, wherein the battery module defines screw holes overlapping at least a part of the housing.

2. The battery pack according to claim 1, wherein, the screw holes are located in at least one of a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw holes penetrate the battery module, and a portion of the battery module that deviates from the substantially central portion toward the side where the screw holes are located from the side where at least a part of the housing is located.

3. The battery pack according to claim 1, wherein, the screw holes are located in a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw holes penetrate the battery module.

4. The battery pack according to any one of claims 1 to 3, wherein, at least two of the screw holes are provided in regions on opposite sides of the battery module.

5. The battery pack according to any one of claims 1 to 3, wherein, at least a part of the housing has at least a part of a frame surrounding at least a part of the battery module.

6. A method for disassembling a battery module, characterized in that, it includes the following steps: screwing a through member into the screw holes of the battery module housed in a housing; and further screwing the through member into the screw holes in a state where at least a part of the through member and at least a part of the housing overlapping the screw holes are in contact with each other.

7. The method for disassembling a battery module according to claim 6, wherein, the screw holes are located in at least one of a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw holes penetrate the battery module, and a portion of the battery module that deviates from the substantially central portion toward the side where the screw holes are located from the side where at least a part of the housing is located.

8. The method for disassembling a battery module according to claim 6, wherein, the screw holes are located in a substantially central portion of the battery module in a direction substantially parallel to the direction in which the screw holes penetrate the battery module.

9. The method for disassembling a battery module according to any one of claims 6 to 8, wherein, at least two of the screw holes are provided in regions on opposite sides of the battery module.

10. The method for disassembling a battery module according to any one of claims 6 to 8, wherein, at least a part of the housing has at least a part of a frame surrounding at least a part of the battery module.

11. The method for disassembling a battery module according to any one of claims 6 to 8, wherein, it further includes the following step: pulling up the battery module by pulling up the through member in a state where the through member is screwed into the screw holes.

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