End plate, battery pack and vehicle

Abstract

The utility model provides an end plate of a battery pack, the battery pack and a vehicle, the end plate is used for being matched with the end part of a battery pack, the end plate comprises a first plate body, a buffer beam and a second plate body, a buffer cavity is formed in the first plate body, the buffer cavity is provided with a first cavity wall and a second cavity wall which are oppositely arranged, and the buffer beam is arranged in the first plate body. The two ends of the buffer beam are connected with the first cavity wall and the second cavity wall respectively, and the buffer beam is provided with a bent part; the positioning block is fixedly arranged on the first cavity wall and / or the second cavity wall, and the positioning block is used for limiting the limiting position where the first cavity wall and the second cavity wall are close to each other. When the battery pack expands in the using process, the first cavity wall or the second cavity wall is extruded, the buffer cavity shrinks, the expansion volume of the battery pack is buffered, and the situation that the battery pack is subjected to large pressure and lithium precipitation occurs is prevented. The positioning blocks can limit the battery pack from expanding to extrude the limiting positions where the first cavity wall and the second cavity wall are close to each other, so that the battery pack is prevented from excessively expanding to influence the cycle characteristics.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and specifically to an end plate, a battery pack and a vehicle. Background Art

[0002] The battery pack is a key component in new energy vehicles. The battery pack contains a battery group. In order to position the battery group and limit its expansion, end plates are usually set at both ends of the battery group. The end plates in the prior art are rigid structures, and the battery cells will expand during use. The end plates cannot adapt to the volume of the expanded battery cells, resulting in greater pressure on the battery cells near the end plates, resulting in lithium deposition. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the end plate of the battery pack easily causes lithium deposition in the battery cell, thereby providing an end plate, a battery pack and a vehicle.

[0004] In order to solve the above problems, the utility model provides an end plate, which is used to cooperate with the end of a battery pack, and the end plate includes: a first plate body, a buffer cavity is formed in the first plate body, the buffer cavity has a first cavity wall and a second cavity wall arranged opposite to each other, a buffer beam is arranged in the first plate body, and the two ends of the buffer beam are respectively connected to the first cavity wall and the second cavity wall, and the buffer beam has a bending portion; a positioning block is fixedly arranged on the first cavity wall and / or the second cavity wall, and the positioning block is used to limit the extreme position of the first cavity wall and the second cavity wall approaching each other.

[0005] Optionally, the positioning block includes a first positioning block and a second positioning block that are arranged opposite to each other, and when the first cavity wall and the second cavity wall are in a non-deformed state, there is a preset gap between the first positioning block and the second positioning block.

[0006] Optionally, the buffer beam includes a first buffer beam and a second buffer beam, the first buffer beam and the second buffer beam are respectively located on both sides of the positioning block, and the bending direction of the bending part of the first buffer beam is opposite to the bending direction of the bending part of the second buffer beam.

[0007] Optionally, the first plate body also includes a first outer wall and a second outer wall arranged opposite to each other, and a third outer wall and a fourth outer wall arranged opposite to each other, the surface of the first outer wall is used to cooperate with the end of the battery pack, the third outer wall faces the upper shell of the battery pack, and the fourth outer wall faces the lower shell of the battery pack, and a heat insulation layer is provided on the surface of the first outer wall; and / or, an insulating heat protection layer is provided on the surface of the third outer wall, and the insulating heat protection layer covers at least a portion of the surface of the first outer wall, and / or, the insulating heat protection layer covers at least a portion of the surface of the second outer wall.

[0008] Optionally, the first plate body also includes a first outer wall and a second outer wall arranged in opposite directions, the surface of the first outer wall is used to cooperate with the end of the battery pack, and the first plate body is provided with a connecting hole that passes through the first outer wall and the second outer wall. The first outer wall and / or the second outer wall have a thickened section, and the connecting hole is arranged at the position corresponding to the thickened section.

[0009] Optionally, a mounting groove is provided on the third outer wall, and the mounting groove is used for mounting the output pole support.

[0010] The utility model also provides a battery pack, including a shell and a plurality of battery groups arranged in the shell, the plurality of battery groups are distributed along a first direction, each battery group extends along a second direction, the end plate is used to cooperate with the end of the battery group facing the second direction, the shell includes a lower shell and an upper shell that are interlocked with each other along a third direction, the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction. The battery pack also includes: a plurality of cooling plates, which are arranged at intervals along the first direction, battery groups are arranged between adjacent cooling plates, and cooling channels are arranged in the cooling plates; end plates, the end plates are the above-mentioned end plates, two end plates are connected between adjacent cooling plates, and along the second direction, the two end plates are respectively located at both ends of the battery pack.

[0011] Optionally, an electrical compartment is formed in the shell, and the end of the cooling plate is connected to the end plate in the direction toward the electrical compartment, and the end of the cooling plate protrudes from the end plate in the direction away from the electrical compartment. A first opening and a second opening are provided on the part of the cooling plate protruding from the end plate, and the first opening and the second opening are connected to the cooling channel.

[0012] Optionally, an adapter plate is provided on the cooling plate, and the adapter plate is connected to the end plate via a connecting piece, or the adapter plate is connected to the end plate via welding.

[0013] Optionally, the battery pack includes a battery cell, and along the first direction, the battery cell includes a first surface and a second surface that are arranged away from each other, and the first surface and the second surface are respectively bonded to adjacent cooling plates.

[0014] Optionally, the battery cell includes a shell and an insulating film wrapped outside the shell, and the area where the insulating film covers the first surface and the second surface is provided with a hollow area, and the area of ​​the hollow area is 60% to 80% of the area of ​​the first surface or the second surface.

[0015] Optionally, along the third direction, the battery cell also includes a third surface and a fourth surface arranged opposite to each other, the third surface faces the lower shell, and the fourth surface faces the upper shell, the cooling plate includes a second plate body, and along the second direction, the second plate body includes a side surface, and a first side convexity and a second side convexity are arranged on the side surface, the first side convexity and the second side convexity both extend toward the second direction, the first side convexity is arranged close to the lower shell, and the second side convexity is arranged close to the upper shell, and the distance between the first side convexity and the second side convexity is greater than the distance between the third surface and the fourth surface, and the battery pack also includes an elastic positioning strip, which is clamped between the first side convexity and the third surface; and / or the elastic positioning strip is clamped between the second side convexity and the fourth surface.

[0016] The utility model also provides a vehicle, comprising the above-mentioned battery pack.

[0017] The utility model has the following advantages:

[0018] By utilizing the technical solution of the utility model, a buffer cavity is provided in the first plate body of the end plate, so that the end plate forms an elastic structure that can be deformed. When the battery pack expands during use, the first cavity wall or the second cavity wall is squeezed, the buffer cavity shrinks, and the bent part of the buffer beam is compressed. At this time, the end plate can buffer the expansion volume of the battery pack to prevent the battery pack from being subjected to greater pressure and lithium deposition. At the same time, the positioning block can limit the expansion of the battery pack, squeezing the first cavity wall and the second cavity wall close to each other to prevent the battery pack from excessively expanding and affecting its cycle characteristics. When the volume of the battery pack is restored, the buffer beam releases the elastic force, and the first cavity wall and the second cavity wall return to their original position, so that the surface of the first plate body is close to the end of the battery pack, ensuring the positioning effect. Therefore, the technical solution of the utility model solves the defect of the battery pack end plate in the prior art that it is easy to cause lithium deposition in the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of an end plate of a battery pack of the present invention is shown;

[0021] Figure 2 Shows Figure 1 A schematic side view of the middle end plate;

[0022] Figure 3 A schematic structural diagram of a battery pack of the present utility model is shown;

[0023] Figure 4 Shows Figure 3 Schematic diagram of the battery pack;

[0024] Figure 5 Shows Figure 4 Schematic diagram of the assembly relationship between the battery pack, end plate and cooling plate of the battery pack;

[0025] Figure 6 Shows Figure 5 A schematic diagram of the structure of the middle battery pack near the electrical compartment;

[0026] Figure 7 Shows Figure 5 A schematic diagram of the structure of the battery pack on the side away from the electrical compartment;

[0027] Figure 8 Shows Figure 5 A schematic diagram of a first side or a second side of a plurality of battery cells in a battery pack;

[0028] Fig. 9 Shows Figure 5 A schematic side view of the cooling plate;

[0029] Fig.10 Shows Figure 5 Schematic diagram of the assembly of the cooling plate and the battery cell;

[0030] Fig.11 Shows Figure 4 Schematic diagram of the assembly of the middle cooling plate and the lower shell;

[0031] Fig.12 Shows Figure 4 Schematic diagram of the assembly of the middle cooling plate and the upper shell.

[0032] Description of reference numerals:

[0033] 10. First plate; 11. Buffer cavity; 111. First cavity wall; 112. Second cavity wall; 12. First outer wall; 13. Second outer wall; 14. Thickened section; 15. Third outer wall; 16. Fourth outer wall; 20. Buffer beam; 21. Bending portion; 22. First buffer beam; 23. Second buffer beam; 30. Positioning block; 31. First positioning block; 32. Second positioning block; 40. Insulation layer; 50. Connection hole; 60. Insulation heat protection layer; 70. Mounting groove; 100. Shell; 101. Lower shell; 102. Upper shell; 103. Electrical compartment; 200. Battery pack ; 201, battery cell; 2011, first side; 2012, second side; 2013, shell; 2014, insulating film; 2015, hollow area; 2016, third side; 2017, fourth side; 300, cooling plate; 301, cooling channel; 302, first opening; 303, second opening; 304, adapter plate; 305, second plate body; 3051, side; 3052, first side convex; 3053, second side convex; 3054, first end face; 3055, second end face; 400, elastic positioning strip; 500, first fastener; 600, second fastener. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figures 1 to 4 In the embodiment of the end plate of the present application, the battery pack includes a housing 100 and a plurality of battery packs 200 arranged in the housing 100, wherein the plurality of battery packs 200 are distributed along a first direction, and each battery pack 200 extends along a second direction. Each battery pack 200 may include a plurality of battery cells 201, that is, the plurality of battery cells 201 are arranged in sequence along the second direction. Alternatively, each battery pack 200 may include only one battery cell 201, which is longer in size and extends along the second direction (e.g., a blade battery).

[0039] Furthermore, the end plate is used to cooperate with the end of the battery pack 200 facing the second direction, and the end plate plays a role in limiting the battery pack 200.

[0040] Furthermore, the housing 100 includes a lower housing 101 and an upper housing 102 that are interlocked along a third direction. After the lower housing 101 and the upper housing 102 are interlocked, a receiving cavity is formed inside, and the receiving cavity is used to install the battery pack 200, electrical components, etc. The edges of the lower housing 101 and the upper housing 102 are connected (by fasteners, welding, etc.), so that a closed cavity is formed inside the housing 100.

[0041] It should be noted that the first direction and the second direction are perpendicular, and the third direction is perpendicular to the first direction and the second direction. Taking the battery pack installed at the rear of the vehicle as an example, the first direction is the width direction of the vehicle, the second direction is the front-rear direction of the vehicle, and the third direction is the height direction of the vehicle. Of course, the end plate of this embodiment can be in any posture, and the above example cannot be understood as a limitation on the end plate.

[0042] like Figure 1 and Figure 2 As shown, the end plate of this embodiment includes a first plate body 10, a buffer beam 20 and a positioning block 30. A buffer cavity 11 is formed in the first plate body 10, and the buffer cavity 11 has a first cavity wall 111 and a second cavity wall 112 arranged opposite to each other along the second direction. The buffer beam 20 is arranged in the first plate body 10, and the two ends of the buffer beam 20 are respectively connected to the first cavity wall 111 and the second cavity wall 112, and the buffer beam 20 has a bending portion 21. The positioning block 30 is fixedly arranged on the first cavity wall 111 and / or the second cavity wall 112, and the positioning block 30 is used to limit the extreme position of the first cavity wall 111 and the second cavity wall 112 approaching each other.

[0043] By using the technical solution of this embodiment, a buffer cavity 11 is provided in the first plate body 10 of the end plate, so that the end plate forms an elastic structure that can be deformed. When the battery pack 200 expands during use, the first cavity wall 111 or the second cavity wall 112 is squeezed, the buffer cavity 11 shrinks, and the bent portion 21 of the buffer beam 20 is compressed. At this time, the end plate can buffer the expansion volume of the battery pack 200, preventing the battery pack 200 from being subjected to a large pressure and lithium deposition. At the same time, the positioning block 30 can limit the expansion of the battery pack 200, squeezing the first cavity wall 111 and the second cavity wall 112 to the extreme position close to each other, and preventing the battery pack 200 from excessively expanding and affecting its cycle characteristics. When the volume of the battery pack 200 is restored, the buffer beam 20 releases the elastic force, and the first cavity wall 111 and the second cavity wall 112 are restored to the original position, so that the surface of the first plate body 10 is close to the end of the battery pack 200, ensuring the positioning effect. Therefore, the technical solution of this embodiment solves the defect that the battery pack end plate in the prior art is easy to cause lithium deposition of the battery cell.

[0044] like Figure 1 and Figure 2 As shown, a cavity, namely, a buffer cavity 11, is formed inside the first plate body 10. After the end plate is assembled, the outer surface of the first plate body 10 corresponding to the first cavity wall 111 of the buffer cavity 11 fits with the end of the battery pack 200, or the outer surface of the first plate body 10 corresponding to the second cavity wall 112 of the buffer cavity 11 fits with the end of the battery pack 200. Therefore, when the battery pack 200 expands during operation, the expansion force will push the first cavity wall 111 or the second cavity wall 112 to deform, so that the middle parts of the first cavity wall 111 and the second cavity wall 112 are close to each other. The deformation of the first cavity wall 111 or the second cavity wall 112 provides a buffer for the expansion of the battery pack 200, preventing the battery pack 200 from receiving a large pressure and causing lithium deposition.

[0045] like Figure 1 and Figure 2 As shown, along the second direction, the two ends of the buffer beam 20 are respectively connected to the first cavity wall 111 and the second cavity wall 112, and the buffer beam 20 has a bent portion 21. Therefore, when the buffer beam 20 is subjected to a force along the second direction (expansion force of the battery pack 200), the buffer beam 20 forms an elastic structure rather than a rigid structure.

[0046] Optionally, the bending portion 21 may be “V”-shaped, “U”-shaped, “W”-shaped, etc. Of course, those skilled in the art may adaptively design the structure of the bending portion 21 as long as the bending portion 21 can be deformed when the buffer beam 20 is subjected to a force in the second direction.

[0047] The buffer beam 20 in this embodiment has two main functions. One function is that when the battery pack 200 expands and squeezes the first cavity wall 111 or the second cavity wall 112 to deform, the buffer beam 20 is squeezed and deformed, so the buffer beam 20 can provide elastic force to the first cavity wall 111 and the second cavity wall 112. The elastic force can resist the expansion force of part of the battery pack 200, thereby preventing the battery pack 200 from over-expanding and affecting the cycle characteristics of the battery pack 200.

[0048] Another function is that when the volume of the battery pack 200 is restored, the elastic force of the buffer beam 20 can restore the first cavity wall 111 and the second cavity wall 112 to their initial positions. Therefore, when the volume of the battery pack 200 is restored, the surface of the rear plate can still be close to the end of the battery pack 200 to ensure its limiting function.

[0049] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, a positioning block 30 is provided in the buffer cavity 11. The function of the positioning block 30 is to limit the extreme position of the two approaching each other when the battery pack 200 expands and squeezes the first cavity wall 111 and the second cavity wall 112 to deform. The positioning block 30 can be arranged in the following four ways.

[0050] 1. The positioning block 30 is only provided on the first cavity wall 111. When the battery pack 200 expands and squeezes the first cavity wall 111 or the second cavity wall 112 is deformed, the positioning block 30 gradually approaches the second cavity wall 112. Until the positioning block 30 abuts against the second cavity wall 112, the end plate changes from an elastic structure to a rigid structure, that is, the first cavity wall 111 and the second cavity wall 112 can no longer be deformed.

[0051] Second, the positioning block 30 is only provided on the second cavity wall 112. When the battery pack 200 expands and squeezes the first cavity wall 111 or the second cavity wall 112 is deformed, the positioning block 30 gradually approaches the first cavity wall 111. Until the positioning block 30 abuts against the first cavity wall 111, the end plate changes from an elastic structure to a rigid structure, that is, the first cavity wall 111 and the second cavity wall 112 can no longer be deformed.

[0052] 3. Positioning blocks 30 are provided on both the first cavity wall 111 and the second cavity wall 112, and along the third direction, the two positioning blocks 30 are arranged opposite to each other ( Figure 2 When the battery pack 200 expands and squeezes the first cavity wall 111 or the second cavity wall 112 to deform, the two positioning blocks 30 gradually approach each other until the two positioning blocks 30 abut against each other, at which time the end plate changes from an elastic structure to a rigid structure, that is, the first cavity wall 111 and the second cavity wall 112 can no longer deform.

[0053] Fourth, positioning blocks 30 are provided on both the first cavity wall 111 and the second cavity wall 112, and the two positioning blocks 30 are staggered along the third direction. When the battery pack 200 expands and squeezes the first cavity wall 111 or the second cavity wall 112 is deformed, the positioning block 30 of the first cavity wall 111 gradually approaches the second cavity wall 112, and the positioning block 30 of the second cavity wall 112 gradually approaches the first cavity wall 111. Until the positioning block 30 of the first cavity wall 111 abuts against the second cavity wall 112, and the positioning block 30 of the second cavity wall 112 abuts against the first cavity wall 111, at this time, the end plate changes from an elastic structure to a rigid structure, that is, the first cavity wall 111 and the second cavity wall 112 can no longer continue to deform.

[0054] In the above-mentioned setting mode 1, one or more positioning blocks 30 may be provided on the first cavity wall 111; in the above-mentioned setting mode 2, one or more positioning blocks 30 may be provided on the second cavity wall 112; in the above-mentioned setting mode 3, one or more positioning blocks 30 may be provided on the first cavity wall 111 and the second cavity wall 112 respectively. In the above-mentioned setting mode 4, one or more positioning blocks 30 may be provided on the first cavity wall 111, and one or more positioning blocks 30 may be provided on the second cavity wall 112.

[0055] It can be seen that by setting the positioning block 30, the extreme deformation position of the end plate can be limited, so that the end plate changes from an elastic structure to a rigid structure, limiting the maximum expansion volume of the battery pack 200, and preventing the battery pack 200 from affecting the cycle performance due to excessive expansion.

[0056] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the positioning block 30 includes a first positioning block 31 and a second positioning block 32. The first positioning block 31 is arranged at the middle position of the first cavity wall 111, and the second positioning block 32 is arranged at the middle position of the second cavity wall 112. The first positioning block 31 and the second positioning block 32 are arranged opposite to each other, and when the first cavity wall 111 and the second cavity wall 112 are in a non-deformed state, there is a preset gap between the first positioning block 31 and the second positioning block 32.

[0057] Specifically, if Figure 2 As shown, the above-mentioned “and the first cavity wall 111 and the second cavity wall 112 are in a non-deformed state” means that after the first plate body 10 is assembled, the pressure applied by the end of the battery pack 200 is not greater than the sum of the elastic force of the first cavity wall 111 or the second cavity wall 112 and the elastic force applied by the buffer beam 20. In this case, there is a preset gap between the first positioning block 31 and the second positioning block 32, and the first plate body 10 is an elastic structure.

[0058] When the battery pack 200 expands during operation, the elastic force applied by the end of the battery pack 200 to the first plate 10 causes the first cavity wall 111 or the second cavity wall 112 to deform. It can be understood by those skilled in the art that the greater the volume expansion of the battery pack 200, the smaller the distance between the first positioning block 31 and the second positioning block 32, until the first positioning block 31 and the second positioning block 32 abut against each other. At this time, the first plate 10 changes from an elastic structure to a rigid structure and can no longer deform, thereby limiting the maximum expansion volume of the battery pack 200.

[0059] Furthermore, under normal circumstances, the deformation of the middle position of the first cavity wall 111 and the second cavity wall 112 is the largest. Therefore, in this embodiment, the first positioning block 31 is set in the middle position of the first cavity wall 111, and the second positioning block 32 is set in the middle position of the second cavity wall 112, which is beneficial to control the extreme deformation of the first cavity wall 111 and the second cavity wall 112.

[0060] like Figure 2 As shown, in the technical solution of this embodiment, the first cavity wall 111 is arranged close to the end of the battery pack 200 , and along the second direction, the size of the first positioning block 31 is smaller than or larger than the size of the second positioning block 32 .

[0061] Specifically, the first cavity wall 111 is disposed near the end of the battery pack 200, that is, the outer surface of the first plate 10 corresponding to the first cavity wall 111 is the surface that matches the battery pack 200. When the working volume of the battery pack 200 expands, the first cavity wall 111 will be squeezed and deformed.

[0062] In this embodiment, along the second direction, the size of the first positioning block 31 is smaller than the size of the second positioning block 32. Such a configuration is beneficial to the deformation of the first cavity wall 111.

[0063] In some embodiments not shown, along the second direction, the size of the first positioning block 31 may be larger than the size of the second positioning block 32. This arrangement can increase the strength of the first cavity wall 111 and reduce the risk of deformation and fracture of the first cavity wall 111.

[0064] In some embodiments not shown, along the second direction, the size of the first positioning block 31 may also be equal to the size of the second positioning block 32 .

[0065] like Figure 1 and Figure 2As shown, in the technical solution of this embodiment, the buffer beam 20 includes a first buffer beam 22 and a second buffer beam 23. Along the third direction, the first buffer beam 22 and the second buffer beam 23 are respectively located on both sides of the positioning block 30, and the bending direction of the bending portion 21 of the first buffer beam 22 is opposite to the bending direction of the bending portion 21 of the second buffer beam 23.

[0066] Specifically, along the third direction, the first buffer beam 22 and the second buffer beam 23 are arranged in mirror symmetry with respect to the positioning block 30. Figure 2 The direction shown is an example, the first buffer beam 22 is located at the upper side of the positioning block 30, and the bending portion 21 of the first buffer beam 22 is bent toward the upper side. The second buffer beam 23 is located at the lower side of the positioning block 30, and the bending portion 21 of the first buffer beam 22 is bent toward the lower side.

[0067] The first buffer beam 22 and the second buffer beam 23 are arranged in this way so that they can provide uniform elastic force to the first cavity wall 111 and the second cavity wall 112 .

[0068] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the first plate body 10 also includes a first outer wall 12 and a second outer wall 13 arranged opposite to each other along a second direction, and the surface of the first outer wall 12 is used to cooperate with the end of the battery pack 200, and a heat insulation layer 40 is provided on the surface of the first outer wall 12.

[0069] Specifically, the heat insulating layer 40 can slow down the heat transfer between the battery pack 200 and the first plate 10 , thereby preventing an excessively large temperature difference between the middle and end portions of the battery pack 200 .

[0070] Optionally, the heat insulation layer 40 may be made of aerogel material, or phase change material, or low thermal conductivity material.

[0071] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the first plate body 10 further includes a first outer wall 12 and a second outer wall 13 arranged in opposite directions along the second direction, and a connecting hole 50 penetrating the first outer wall 12 and the second outer wall 13 is provided on the first plate body 10. The first outer wall 12 and / or the second outer wall 13 has a thickened section 14, and the connecting hole 50 is provided at a position corresponding to the thickened section 14.

[0072] Specifically, the connection hole 50 is used to connect with the longitudinal beam, so that the end plate and the longitudinal beam enclose a space for installing the battery pack 200. Since the longitudinal beams are arranged on both sides of the first plate body 10, the connection hole 50 is arranged on both sides of the first outer wall 12 and the second outer wall 13 of the first plate body 10 along the first direction. The connection hole 50 penetrates through the first outer wall 12 and the second outer wall 13.

[0073] Further, on each side of the first outer wall 12 and the second outer wall 13 of the first plate body 10 along the first direction, a plurality of connection holes 50 are provided, and the plurality of connection holes 50 are arranged at intervals along the third direction.

[0074] In this embodiment, three connection holes 50 are provided on each side of the first outer wall 12 and the second outer wall 13 of the first plate body 10 along the first direction, and the three connection holes 50 are respectively located at the top, the middle and the bottom of the first plate body 10 .

[0075] Furthermore, since the first cavity wall 111 and the second cavity wall 112 are relatively thin, in order to increase the connection strength between the first plate body 10 and the longitudinal beam, the first plate body 10 is correspondingly provided with a thickened section 14 so that the through path of the connecting hole 50 passes through the thickened section 14 to ensure the connection strength between the fastener and the first plate body 10.

[0076] As described above, since the top, middle and bottom of the first plate body 10 are provided with connection holes 50 along the third direction, the thickened section 14 is correspondingly provided at the top, middle and bottom of the first plate body 10. And since the connection holes 50 are provided on both sides of the first plate body 10 along the first direction, the thickened section 14 also extends along the first direction, ensuring that the connection holes 50 on both sides of the first plate body 10 can pass through the thickened section 14.

[0077] Furthermore, since the first outer wall 12 is matched with the end of the battery pack 200, Figure 2 As shown, the thickened section 14 is arranged on the second outer wall 13 so as not to hinder the deformation of the first outer wall 12 .

[0078] In some embodiments not shown, the thickened section 14 may also be provided on the first outer wall 12 , or the thickened section 14 may be provided on both the first outer wall 12 and the second outer wall 13 .

[0079] like Figure 1 and Figure 2 As shown, since the first cavity wall 111 is provided with a first positioning block 31 in the middle, and the second cavity wall 112 is provided with a second positioning block 32 in the middle, the first positioning block 31 and the second positioning block 32 are both protruding structures, which can also play a role in thickening the first cavity wall 111 and the second cavity wall 112. Therefore, in this embodiment, the first positioning block 31 also serves as the thickening section 14 in the middle of the first outer wall 12, and the second positioning block 32 also serves as the thickening section in the middle of the second outer wall 13. That is, in this embodiment, the positioning block 30 also forms the thickening section 14.

[0080] from Figure 1 and Figure 2It can be seen that along the third direction, the connection hole 50 in the middle of the first plate body 10 passes through the first positioning block 31 and the second positioning block 32. Further, after the connection hole 50 passes through the fastener, the fastener can also guide the deformation of the first cavity wall 111 and the second cavity wall 112, ensuring that when the working volume of the battery pack 200 expands, the middle of the first cavity wall 111 and the second cavity wall 112 undergoes the maximum deformation.

[0081] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the first plate body 10 also includes a third outer wall 15 and a fourth outer wall 16 arranged opposite to each other along a third direction, the third outer wall 15 is arranged toward the upper shell 102, and the fourth outer wall 16 is arranged toward the lower shell 101, and the surface of the third outer wall 15 is provided with an insulating thermal protection layer 60.

[0082] Specifically, when a battery cell 201 in the battery pack 200 erupts under thermal runaway, the insulating heat protection layer 60 can prevent the risk of arcing on the third outer wall 15 of the first plate body 10 .

[0083] Optionally, the insulating heat protection layer 60 is a ceramic silicone composite tape.

[0084] like Figure 1 and Figure 2 As shown, the above-mentioned insulating heat protection layer 60 covers the upper surface of the first outer wall 12 and the upper inner surface of the second outer wall 13 at the same time, thereby further improving the protection performance.

[0085] In some embodiments not shown, the insulating heat protection layer 60 may also cover the entire surface of the first outer wall 12 , or the insulating heat protection layer 60 may also cover the entire surface of the first outer wall 12 .

[0086] In some embodiments not shown, the insulating heat protection layer 60 may also only cover part or all of the surface of the first outer wall 12 .

[0087] In some embodiments not shown, the insulating heat protection layer 60 may also only cover part or all of the surface of the second outer wall 13 .

[0088] like Figure 1 As shown, in the technical solution of this embodiment, a mounting groove 70 is provided on the third outer wall 15, and the mounting groove is used to install the output pole support. The bottom wall of the mounting groove 70 is also provided with a plug hole, and the plug hole is used to cooperate with the plug block on the output pole support.

[0089] like Figures 3 to 5As shown, the present application also provides a battery pack. According to an embodiment of the battery pack of the present application, it includes a shell 100, a plurality of battery packs 200 arranged in the shell 100, a plurality of cooling plates 300 and the above-mentioned end plates. Among them, the plurality of battery packs 200 are distributed along the first direction, each battery pack 200 extends along the second direction, and the end plate is used to cooperate with the end of the battery pack 200 facing the second direction. The shell 100 includes a lower shell 101 and an upper shell 102 that are interlocked with each other along the third direction. The plurality of cooling plates 300 are arranged at intervals along the first direction, and the battery packs 200 are arranged between adjacent cooling plates 300, and the cooling channels 301 are arranged in the cooling plates 300. Furthermore, two end plates are connected between adjacent cooling plates 300, and along the second direction, the two end plates are respectively located at both ends of the battery pack 200.

[0090] In this embodiment, the cooling plate 300 is also the longitudinal beam mentioned above, so the cooling plate 300 of this embodiment can not only cool the battery pack 200 but also form a mounting frame for the battery pack 200 .

[0091] like Figure 5 As shown, two end plates are connected between adjacent cooling plates 300 , and the two end plates are spaced apart along the second direction, so that a square space is enclosed between adjacent cooling plates 300 and between the two end plates, and the square space is used to place a battery pack 200 .

[0092] Furthermore, a cooling channel 301 is provided in the cooling plate 300, and a cooling medium can pass through the cooling channel 301. The cooling medium can exchange heat with the cooling plate 300. Therefore, the heat emitted by the battery pack 200 during operation can be transferred to the cooling medium through the cooling plate 300, thereby cooling the battery pack 200 and realizing thermal management of the battery pack 200.

[0093] like Figures 4 to 7 As shown, an electrical compartment 103 is formed in the housing 100, and the end of the cooling plate 300 is connected to the end plate in the direction toward the electrical compartment 103. In the direction away from the electrical compartment 103, the end of the cooling plate 300 protrudes from the end plate, and the portion of the cooling plate 300 protruding from the end plate is provided with a first opening 302 and a second opening 303, and the first opening 302 and the second opening 303 are connected to the cooling channel 301.

[0094] Specifically, the electrical compartment 103 is provided with electrical components such as high voltage busbars. Figure 6 It can be seen that the end of the cooling plate 300 is connected to the end plate in the direction toward the electrical compartment 103. Figure 7It can be seen that in the direction away from the electrical compartment 103, the end of the cooling plate 300 protrudes from the end plate, and a first opening 302 and a second opening 303 are provided on the protruding portion. The cooling medium can enter the cooling channel 301 through the first opening 302. After the cooling medium exchanges heat, it flows out of the cooling channel 301 through the second opening 303, thereby realizing cyclic cooling of the battery pack 200.

[0095] Furthermore, joints may be provided at the first opening 302 and the second opening 303 , and the joints are convenient for connection with pipelines of the cooling medium.

[0096] like Figure 6 and Figure 7 As shown, in the technical solution of this embodiment, an adapter plate 304 is provided on the cooling plate 300, and the adapter plate 304 is connected to the end plate through a connecting piece, or the adapter plate 304 is connected to the end plate through welding.

[0097] Specifically, the adapter plate 304 can be connected to the end plate through a connector, and the connector can include a screw. This connection method makes it easier to disassemble the cooling plate 300 and the end plate, and facilitates the maintenance and replacement of the battery pack 200. In this embodiment, the adapter plate 304 is provided with a through hole, and the connector passes through the through hole of the adapter plate 304 and the above-mentioned connection hole 50.

[0098] Furthermore, the adapter plate 304 may also be connected to the end plate by welding, which makes the connection strength between the cooling plate 300 and the end plate higher.

[0099] like Figure 6 As shown, in the direction toward the electrical compartment 103 and in the outermost cooling plate 300 along the first direction, the adapter plate 304 at the end of the cooling plate 300 can be an L-shaped metal sheet, one side of the L-shaped metal sheet is fixed to the end of the cooling plate 300, and the other side is connected to the end plate.

[0100] like Figure 6 As shown, in the direction toward the electrical compartment 103 and in the non-outermost cooling plate 300 along the first direction, the adapter plate 304 at the end of the cooling plate 300 can be a T-shaped metal sheet, one edge of the T-shaped metal sheet is fixed to the end of the cooling plate 300, and the other two edges are respectively connected to the end plates on both sides.

[0101] like Figure 7As shown, in the direction away from the electrical compartment 103, since the end plate is not connected to the end of the cooling plate 300, each adapter plate 304 on the cooling plate 300 is an L-shaped metal sheet, one side of the L-shaped metal sheet is fixed to the cooling plate 300, and the other side is connected to the end plate. Further, in the outermost cooling plate 300 along the first direction, the L-shaped metal sheet is only provided on one side of the cooling plate 300, and in the non-outermost cooling plate 300 along the first direction, the L-shaped metal sheet is provided on both sides of the cooling plate 300.

[0102] like Figures 6 to 8 As shown, in the technical solution of this embodiment, the battery pack 200 includes a battery cell 201. Along the first direction, the battery cell 201 includes a first surface 2011 and a second surface 2012 arranged away from each other, and the first surface 2011 and the second surface 2012 are respectively bonded to the adjacent cooling plate 300.

[0103] By bonding the first surface 2011 and the second surface 2012 of the battery cell 201 to the adjacent cooling plate 300 respectively, the battery cell 201 and the adjacent cooling plate 300 are closely fitted together, thereby achieving a better heat exchange and cooling effect.

[0104] like Figure 6 and Figure 8 As shown, in the technical solution of this embodiment, the battery cell 201 includes a shell 2013 and an insulating film 2014 wrapped outside the shell 2013, and the area of ​​the insulating film 2014 covering the first surface 2011 and the second surface 2012 is provided with a hollow area 2015.

[0105] Specifically, the cooling plate 300 in this embodiment is coated with an insulating film. If the battery cell 201 is directly bonded to the cooling plate 300, the glue will be bonded between the two insulating films, resulting in poor fixing effect. Therefore, in this embodiment, the insulating film 2014 of the battery cell 201 is subjected to window processing, that is, a hollow area 2015 is processed on the insulating film 2014, and the aluminum metal shell 2013 of the battery cell 201 is exposed at the hollow area 2015. Therefore, during subsequent bonding, the glue is bonded between the aluminum shell and the insulating film of the cooling plate 300, resulting in a better fixing effect.

[0106] Furthermore, the hollow area 2015 is disposed on the surface of the insulating film 2014 covering the first surface 2011 and the second surface 2012 of the battery cell 201 , that is, the hollow area 2015 is disposed on the surface where the battery cell 201 is bonded to two adjacent cooling plates 300 .

[0107] Optionally, on the portion of the insulating film 2014 covering the first surface 2011 of the battery cell 201, the area of ​​the hollow region 2015 needs to account for 60% to 80% of the first surface 2011, so as to ensure the bonding strength between the first surface 2011 and the cooling plate 300. On the portion of the insulating film 2014 covering the second surface 2012 of the battery cell 201, the area of ​​the hollow region 2015 needs to account for 60% to 80% of the second surface 2012, so as to ensure the bonding strength between the second surface 2012 and the cooling plate 300.

[0108] like Fig. 9 and Fig.10 As shown, along the third direction, the battery cell 201 further includes a third surface 2016 and a fourth surface 2017 that are arranged in opposite directions, the third surface 2016 faces the lower housing 101 , and the fourth surface 2017 faces the upper housing 102 .

[0109] Further, the cooling plate 300 includes a second plate body 305. Along the second direction, the second plate body 305 includes a side surface 3051, and the side surface 3051 is provided with a first side protrusion 3052 and a second side protrusion 3053. The first side protrusion 3052 and the second side protrusion 3053 both extend toward the second direction, the first side protrusion 3052 is provided close to the lower shell 101, and the second side protrusion 3053 is provided close to the upper shell 102. The distance between the first side protrusion 3052 and the second side protrusion 3053 is greater than the distance between the third surface 2016 and the fourth surface 2017. The battery pack further includes an elastic positioning strip 400, which is sandwiched between the first side protrusion 3052 and the third surface 2016, and the elastic positioning strip 400 is sandwiched between the second side protrusion 3053 and the fourth surface 2017.

[0110] Specifically, the first side protrusion 3052 and the second side protrusion 3053 are used to fix the position of the battery cell 201 (along the third direction). Fig.10 It can be seen that the battery cell 201 is located between the first side convexity 3052 and the second side convexity 3053. An elastic positioning strip 400 is provided between the first side convexity 3052 and the third surface 2016, and an elastic positioning strip 400 is provided between the second side convexity 3053 and the fourth surface 2017, so that in the third direction, the relative position of the battery cell 201 and the side surface 3051 can be fixed. Further, the first surface 2011 and the second surface 2012 of the battery cell 201 and the side surface 3051 of the second plate body 305 only need a small amount of glue for auxiliary fixing, so it is convenient for the subsequent disassembly between the battery cell 201 and the cooling plate 300, which is beneficial to the maintenance and replacement of the battery cell 201.

[0111] Furthermore, the elastic positioning strip 400 extends along the second direction, thereby ensuring that on the same side of the second plate 305, an elastic positioning strip 400 is provided between the third side 2016 of each battery cell and the first side convexity 3052, and an elastic positioning strip 400 is provided between the fourth side 2017 of each battery cell and the second side convexity 3053.

[0112] Optionally, the elastic positioning strip 400 may be made of elastic materials such as silicone.

[0113] In some embodiments not shown, the third side 2016 of the battery cell 201 can also be made to abut against the first side convexity 3052, and an elastic positioning strip 400 is provided between the fourth side 2017 of the battery cell 201 and the second side convexity 3053, which can also play the effect of fixing the relative position between the battery cell 201 and the side 3051. In this case, an elastic positioning strip 400 is provided at a side 3051 of the second plate 305. And in this embodiment, since the first side convexity 3052 is directly in contact with the bottom surface (third side 2016) of the battery cell 201, a cooling channel can be provided in the first side convexity 3052, and a cooling medium is introduced into the cooling channel to achieve cooling of the bottom surface of the battery cell 201.

[0114] In some embodiments not shown, the fourth surface 2017 of the battery cell 201 may be in contact with the second side protrusion 3053, and an elastic positioning strip 400 may be provided between the third surface 2016 of the battery cell 201 and the first side protrusion 3052, which may also achieve the effect of fixing the relative position between the battery cell 201 and the side surface 3051. In this case, one elastic positioning strip 400 may be provided on one side surface 3051 of the second plate body 305.

[0115] Optionally, the elastic positioning strip 400 may be bonded to the mutually contacting surfaces of the first side protrusion 3052 , so as to fix the elastic positioning strip 400 on the first side protrusion 3052 .

[0116] Optionally, the elastic positioning strip 400 may be bonded to the mutually contacting surfaces of the second side protrusion 3053 , so as to fix the elastic positioning strip 400 on the second side protrusion 3053 .

[0117] By pre-bonding and fixing the two elastic positioning strips 400 on the second plate 305 , when assembling the battery pack 200 , the battery pack 200 can be glued and pressed into the two elastic positioning strips 400 , making the installation of the battery pack 200 simple and quick.

[0118] Furthermore, if Figure 5As shown, in the two outermost cooling plates 300 along the first direction, only one side surface 3051 (coordinated with the battery pack 200) of the second plate body 305 is provided with the first side protrusion 3052 and the second side protrusion 3053. In the other cooling plates 300 not located at the outermost side along the first direction, both side surfaces 3051 of the second plate body 305 are provided with the first side protrusion 3052 and the second side protrusion 3053.

[0119] like Fig. 9 , Fig.11 and Fig.12 As shown, in the technical solution of this embodiment, the cooling plate includes a second plate body 305. Along the third direction, the second plate body 305 includes a first end face 3054 and a second end face 3055. The first end face 3054 is arranged toward the lower shell 101, and the second end face 3055 is arranged toward the upper shell 102. Further, the first end face 3054 is connected to the lower shell 101 through a first fastener 500, and the second end face 3055 is connected to the upper shell 102 through a second fastener 600.

[0120] from Fig.11 It can be seen that a first threaded hole is provided on the first end surface 3054, and a first through hole is correspondingly provided on the lower housing 101. During assembly, the first threaded hole on the first end surface 3054 of the second plate body 305 is aligned with the first through hole on the lower housing 101, and then a screw is passed through the first through hole and tightened in the first threaded hole, so that the lower part of the cooling plate 300 can be fixed on the lower housing 101.

[0121] Optionally, a sealing ring may be provided on the first end surface 3054 around the first threaded hole to ensure sealing of the battery pack at the first via hole.

[0122] from Fig.12 It can be seen that a second threaded hole is provided on the second end surface 3055, and a first through hole is correspondingly provided on the upper shell 102. During assembly, the second threaded hole on the second end surface 3055 of the second plate body 305 is aligned with the second through hole on the upper shell 102, and then a screw is passed through the second through hole and tightened in the second threaded hole, so that the upper part of the cooling plate 300 can be fixed on the upper shell 102.

[0123] Optionally, a sealing ring may be provided on the second end surface 3055 around the second threaded hole to ensure the sealing of the battery pack at the second via hole.

[0124] like Fig.11As shown, the first side protrusion 3052 can strengthen the bottom strength of the second plate 305, thereby increasing the connection strength between the first fastener 500 and the second plate 305. In this embodiment, the first end surface 3054 protrudes from the first side protrusion 3052. In some embodiments not shown, the first end surface 3054 and the end surface of the first side protrusion 3052 facing the lower shell 101 can be flush, and in this case, the contact area between the second plate 305 and the lower shell 101 can be increased, so that the connection between the second plate 305 and the lower shell 101 is more stable.

[0125] like Fig.12 As shown, the second side protrusion 3053 can strengthen the top strength of the second plate 305, thereby increasing the connection strength between the second fastener 600 and the second plate 305. In this embodiment, the second end surface 3055 is flush with the end surface of the second side protrusion 3053 facing the upper shell 102, which can increase the contact area between the second plate 305 and the upper shell 102, thereby making the connection between the second plate 305 and the upper shell 102 more stable.

[0126] Such arrangement enables the lower and upper parts of the cooling plate 300 to be fixed to the lower shell 101 and the upper shell 102 of the battery pack respectively, so that the cooling plate 300 also serves as a longitudinal beam of the battery pack to support the shell 100 .

[0127] Therefore, the cooling plate 300 in this embodiment integrates three functions of cooling the battery pack 200, forming a frame of the battery pack 200, and serving as a longitudinal beam of the shell 100 supporting the battery pack, which significantly simplifies the structure of the battery pack and reduces the cost of the battery pack.

[0128] The present application also provides a vehicle. According to an embodiment of the vehicle of the present application, the vehicle includes the above-mentioned battery pack.

[0129] Optionally, the vehicle is a new energy electric vehicle.

[0130] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An end plate, characterized in that: The end plate is used to cooperate with the end of the battery pack (200), and the end plate comprises: A first plate body (10), wherein a buffer cavity (11) is formed in the first plate body (10), and the buffer cavity (11) has a first cavity wall (111) and a second cavity wall (112) arranged opposite to each other, a buffer beam (20) disposed in the first plate body (10), and two ends of the buffer beam (20) are respectively connected to the first cavity wall (111) and the second cavity wall (112), and the buffer beam (20) has a bent portion (21); A positioning block (30) is fixedly arranged on the first cavity wall (111) and / or the second cavity wall (112), and the positioning block (30) is used to limit the extreme position of the first cavity wall (111) and the second cavity wall (112) approaching each other.

2. The end plate according to claim 1, characterized in that: The positioning block (30) comprises a first positioning block (31) and a second positioning block (32) which are arranged opposite to each other, and when the first cavity wall (111) and the second cavity wall (112) are in a non-deformed state, a preset gap is provided between the first positioning block (31) and the second positioning block (32).

3. The end plate according to claim 1 or 2, characterized in that: The buffer beam (20) comprises a first buffer beam (22) and a second buffer beam (23); the first buffer beam (22) and the second buffer beam (23) are respectively located on two sides of the positioning block (30); the bending direction of the bending portion (21) of the first buffer beam (22) is opposite to the bending direction of the bending portion (21) of the second buffer beam (23).

4. The end plate according to claim 1 or 2, characterized in that: The first plate body (10) further comprises a first outer wall (12) and a second outer wall (13) arranged in opposite directions, and a third outer wall (15) and a fourth outer wall (16) arranged in opposite directions, the surface of the first outer wall (12) being used to cooperate with the end of the battery pack (200), the third outer wall facing the upper shell of the battery pack, and the fourth outer wall facing the lower shell of the battery pack. A heat insulation layer (40) is provided on the surface of the first outer wall (12); and / or, The surface of the third outer wall (15) is provided with an insulating heat protection layer (60), and the insulating heat protection layer (60) covers at least a portion of the surface of the first outer wall (12), and / or the insulating heat protection layer (60) covers at least a portion of the surface of the second outer wall (13).

5. The end plate according to claim 1 or 2, characterized in that: The first plate body (10) further comprises a first outer wall (12) and a second outer wall (13) which are arranged in opposite directions, the surface of the first outer wall (12) being used to cooperate with the end of the battery pack (200), the first plate body (10) being provided with a connecting hole (50) penetrating the first outer wall (12) and the second outer wall (13), the first outer wall (12) and / or the second outer wall (13) having a thickened section (14), the connecting hole (50) being provided at a position corresponding to the thickened section (14).

6. The end plate according to claim 4, characterized in that: The third outer wall (15) is provided with a mounting groove (70), and the mounting groove is used for mounting an output pole support.

7. A battery pack, characterized in that: The battery pack comprises a housing (100) and a plurality of battery packs (200) arranged in the housing (100), wherein the plurality of battery packs (200) are distributed along a first direction, each of the battery packs (200) extends along a second direction, the end plate is used to cooperate with the end of the battery pack (200) facing the second direction, the housing (100) comprises a lower housing (101) and an upper housing (102) which are interlocked along a third direction, the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction, and the battery pack further comprises: A plurality of cooling plates (300) are arranged at intervals along the first direction, the battery pack (200) is arranged between adjacent cooling plates (300), and a cooling channel (301) is arranged in the cooling plate (300); An end plate, wherein the end plate is the end plate described in any one of claims 1 to 6, two of the end plates are connected between adjacent cooling plates (300), and along the second direction, the two end plates are respectively located at two ends of the battery pack (200).

8. The battery pack according to claim 7, characterized in that: An electrical compartment (103) is formed in the shell (100); in the direction toward the electrical compartment (103), the end of the cooling plate (300) is connected to the end plate; in the direction away from the electrical compartment (103), the end of the cooling plate (300) protrudes from the end plate; a first opening (302) and a second opening (303) are provided on the portion of the cooling plate (300) protruding from the end plate; the first opening (302) and the second opening (303) are connected to the cooling channel (301).

9. The battery pack according to claim 7 or 8, characterized in that: An adapter plate (304) is provided on the cooling plate (300), and the adapter plate (304) is connected to the end plate via a connecting piece, or the adapter plate (304) is connected to the end plate via welding.

10. The battery pack according to claim 7 or 8, characterized in that: The battery pack (200) comprises a battery cell (201); along the first direction, the battery cell (201) comprises a first surface (2011) and a second surface (2012) arranged in opposite directions; the first surface (2011) and the second surface (2012) are respectively bonded to the adjacent cooling plate (300).

11. The battery pack according to claim 10, characterized in that: The battery cell (201) comprises a shell (2013) and an insulating film (2014) covering the outside of the shell (2013); the insulating film (2014) covers the first surface (2011) and the second surface (2012), and a hollow area (2015) is provided in the area, wherein the hollow area (2015) has an area of ​​60% to 80% of the area of ​​the first surface (2011) or the second surface (2012).

12. The battery pack according to claim 10, characterized in that: Along the third direction, the battery cell (201) further comprises a third surface (2016) and a fourth surface (2017) arranged in opposite directions, the third surface (2016) faces the lower housing (101), and the fourth surface (2017) faces the upper housing (102). The cooling plate (300) includes a second plate body (305). Along the second direction, the second plate body (305) includes a side surface (3051). The side surface (3051) is provided with a first side convex (3052) and a second side convex (3053). The first side convex (3052) and the second side convex (3053) both extend toward the second direction. The first side convex (3052) is arranged close to the lower shell (101), and the second side convex (3053) is arranged close to the upper shell (102). The distance between the first side convex (3052) and the second side convex (3053) is greater than the distance between the third surface (2016) and the fourth surface (2017). The battery pack further includes an elastic positioning strip (400), wherein the elastic positioning strip (400) is sandwiched between the first side protrusion (3052) and the third surface (2016); and / or the elastic positioning strip (400) is sandwiched between the second side protrusion (3053) and the fourth surface (2017).

13. A vehicle, characterized in that: Comprising a battery pack as claimed in any one of claims 7 to 12.

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