Battery pack and battery pack assembling method

Abstract

The invention relates to the technical field of batteries, and discloses a battery pack and a battery pack assembling method.The battery pack comprises a battery pack shell, a storage cavity is formed in the battery pack shell and used for storing a battery, and the battery comprises a plurality of battery modules; the supporting assembly comprises a bottom supporting plate and a supporting piece, a connecting piece is arranged at the bottom end in the battery pack shell, the bottom supporting plate is connected with the battery pack shell through the connecting piece, and the supporting piece is assembled on the bottom supporting plate and used for fixing a plurality of battery modules; the heat dissipation assembly comprises a first heat dissipation piece and a plurality of second heat dissipation pieces, the first heat dissipation piece is arranged on the supporting piece and used for conducting air cooling heat dissipation on the battery modules, and the second heat dissipation pieces are arranged on the supporting piece and used for conducting water cooling heat dissipation on the battery modules. The heat dissipation device is simple in structure and convenient to install, efficient assembly of the battery pack is achieved, the assembly efficiency is improved, and stable heat dissipation in the subsequent use process of the heat dissipation device is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack and a battery pack assembly method. Background Art

[0002] With the development of new energy vehicles, batteries as a power source of new energy have also been vigorously developed. When batteries are used in new energy vehicles, they are first assembled into battery modules, and then assembled into battery packs through battery modules, so as to provide enough driving energy for new energy vehicles.

[0003] In the prior art, most battery modules are directly installed in the battery pack shell, and several battery modules need to be spliced ​​and installed one by one, resulting in low assembly efficiency of the entire battery pack. In addition, after installation, the battery modules are mostly in contact with each other. Even if a heat dissipation structure is provided, it can only achieve heat dissipation for the entire spliced ​​battery module, resulting in an overall heat dissipation effect that is not ideal.

[0004] Therefore, there is an urgent need for a battery pack and a battery pack assembly method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a battery pack and a battery pack assembly method to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a battery pack, comprising:

[0007] A battery pack housing, wherein a storage cavity is provided inside the battery pack housing for storing batteries, wherein the batteries include a plurality of battery modules;

[0008] A support assembly, comprising a bottom support plate and a support member, wherein a connecting member is provided at the bottom end of the battery pack housing, the bottom support plate is connected to the battery pack housing through the connecting member, and the support member is assembled on the bottom support plate to fix a plurality of the battery modules;

[0009] The heat dissipation assembly includes a first heat dissipation member and a plurality of second heat dissipation members, wherein the first heat dissipation member is arranged on the support member for air cooling the plurality of battery modules, and the plurality of second heat dissipation members are respectively arranged on the support member for water cooling the plurality of battery modules.

[0010] According to a battery pack provided by the present invention, the support member comprises: a main support frame fixedly connected to the middle of the top end of the bottom support plate;

[0011] A plurality of partitioning and positioning plates are respectively arranged on both sides of the main support frame along the axial direction, and the battery module is installed between two adjacent partitioning and positioning plates, and the end of the partitioning and positioning plate away from the main support frame is connected to a side plate;

[0012] A first limiting member is arranged on the partition positioning plate, and the two partition positioning plates located on the same axis are connected by limiting the first limiting member;

[0013] A second limiting member is provided on the partition positioning plate and is used for clamping the battery module.

[0014] According to a battery pack provided by the present invention, a plurality of first grooves are provided at equal intervals along the axial direction on both sides of the main support frame, the first limiting member includes a connecting block fixedly connected to one side of the partition positioning plate, the connecting block is adapted to the first groove, and the opposite sides of the two connecting blocks located on the same axis are respectively fixedly connected to one end of a support rod, and the other end of the support rod is fixedly connected to a buckle, and the two buckles are buckled.

[0015] According to a battery pack provided by the present invention, a plurality of second grooves are provided on the side plate at equal intervals in the axial direction, the second grooves are adapted to the partition positioning plate, the second limiting member comprises a sliding rod slidably connected to both sides of the partition positioning plate, one end of the sliding rod is fixedly connected to a clamping plate, one side of the clamping plate is in contact with the side wall of the battery module, the other end of the sliding rod extends into the partition positioning plate and is fixedly connected to one end of a toggle rod, the other end of the toggle rod extends out of the partition positioning plate and is in contact with the inner wall of the second groove.

[0016] According to a battery pack provided by the present invention, the first heat dissipation component includes two supporting bases fixedly connected to both sides of the bottom end inside the main supporting frame, two turntables are rotatably connected to the supporting base, the two turntables are arranged in parallel and tooth grooves are opened on the inner walls of the turntables, two gears are rotatably connected to the supporting base, the two gears are respectively meshed with the two turntables, and the two gears are meshed, one of the turntables is fixedly connected to a rotating tube in the middle, and the other turntable is fixedly connected to a rotating rod in the middle, the rotating rod passes through the rotating tube, and the two side walls of the main supporting frame are fixedly connected to flow pipes, and one end of the rotating rod and the rotating tube extends into the flow pipe and is fixedly connected to fan blades.

[0017] According to a battery pack provided by the present invention, the second heat sink includes a circulation pipe fixedly connected to the clamping plate, and both ends of the circulation pipe are respectively used for communicating with external cooling liquid.

[0018] According to a battery pack provided by the present invention, the battery pack shell includes a bottom shell, a side shell and a top shell, the bottom shell and the top shell are respectively connected to the bottom and top of the side shell by a plurality of bolts, a protrusion is provided at the bottom of the top shell, the protrusion is adapted to the top of the main support frame, a vent is opened on the side wall of the side shell, and the circulation duct is connected to the vent.

[0019] According to a battery pack provided by the present invention, the connecting part includes a plurality of fixing columns fixedly connected to the top of the bottom shell, a plurality of strip plates are fixedly connected to the top of the fixing columns along the circumferential direction, a clamping joint is fixedly connected to the top of the strip plates, a plurality of through holes are opened on the bottom support plate, a plurality of the through holes correspond one-to-one to a plurality of the fixing columns, and the clamping joint extends through the through holes and is limitedly connected to the bottom support plate.

[0020] According to a battery pack provided by the present invention, a plurality of third grooves are provided at the bottom end of the side plate, the third grooves are located directly above the through holes, limiting holes are provided on the inner side walls of the third grooves, and the card connector extends into the third grooves and is limitedly connected to the limiting holes.

[0021] A battery pack assembly method comprises the following steps:

[0022] Mounting a plurality of battery modules on a bottom support plate through support members;

[0023] Installing the bottom support plate in the battery pack housing;

[0024] The first heat sink is used for air cooling and the second heat sink is used for water cooling.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] The present invention provides a battery pack and a battery pack assembly method, wherein the battery pack housing and the support are separate structures, and a plurality of battery modules are installed on the support, and the support is then directly installed on the battery pack housing after installation, thereby realizing convenient installation of the battery modules in the battery pack housing and improving the overall assembly efficiency. At the same time, after installation, the first heat sink and the second heat sink are connected to realize heat dissipation inside the battery pack and improve the overall installation efficiency. The present application has a simple structure and is convenient to install, realizes efficient assembly of the battery pack, improves assembly efficiency, and ensures stable heat dissipation during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle part;

[0030] Figure 3 This is a schematic diagram of the support structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the separation and positioning plate of the present invention;

[0032] Figure 5 This is a schematic diagram of the main support frame structure of the present invention;

[0033] Figure 6 For the present invention Figure 5 A partial enlarged view of point B in the middle;

[0034] Figure 7 This is a schematic diagram of the structure of the second heat sink of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the first position-limiting member of the present invention;

[0036] Among them, 1. battery pack shell; 101. bottom shell; 102. side shell; 103. top shell; 2. battery module; 3. bottom support plate; 4. main support frame; 5. partition positioning plate; 6. side plate; 7. first groove; 8. connecting block; 9. support rod; 10. buckle; 11. second groove; 12. slide rod; 13. clamping plate; 14. toggle rod; 15. support base; 16. turntable; 17. gear; 18. rotating tube; 19. rotating rod; 20. circulation duct; 21. fan blade; 22. circulation duct; 23. vent; 24. fixing column; 25. strip plate; 26. card joint; 27. through hole; 28. third groove; 29. ​​limit hole; 30. protrusion. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the related art, a battery pack and an assembly method thereof are disclosed, including: a plurality of monomer stacks, including a plurality of battery cells stacked along one direction; a pack shell for accommodating the plurality of monomer stacks; a fixing bracket arranged between the plurality of monomer stacks and the pack shell and between the plurality of monomer stacks; and a fastening component for fastening the fixing bracket to the pack shell, and the fixing bracket can be configured to contact the plurality of battery cells on the upper side of the plurality of monomer stacks.

[0040] In the related art, a battery pack is disclosed, comprising: a box body, the box body forming a receiving space, the box body having a first direction and a second direction; a plurality of battery packs, received in the receiving space, and a plurality of single cells in each battery pack are arranged along the second direction; a side plate, provided on the side of the plurality of battery packs along the first direction; a movable plate, provided on the side of the battery pack along the second direction and connected to the side plate, the movable plate being movable along the second direction so as to be able to adjust the preload force applied to the battery pack, and the side plate and / or the movable plate being fixed to the box body so as to be able to limit the installation position of the battery pack; and a cover plate, provided on the box body.

[0041] In the related art, a battery pack and its assembly method are disclosed, the battery pack includes a box, a liquid cooling plate, a heat conductive fixing layer and a plurality of battery cells. The plurality of battery cells are arranged in an array in the box; the liquid cooling plate cover is arranged on the box; the heat conductive fixing layer is filled and solidified in the gap between the battery cell and the box, the heat conductive fixing layer is also sandwiched between the shoulder of the battery cell and the liquid cooling plate, and covers the pole of the battery cell, and an avoidance channel is opened on the heat conductive fixing layer, and the avoidance channel is directly opposite to the explosion-proof valve of the battery cell.

[0042] In the above-mentioned related technologies, the battery modules are mostly directly installed in the battery pack housing, and several battery modules need to be spliced ​​and installed one by one, which results in low assembly efficiency of the entire battery pack. In addition, after installation, the battery modules are mostly in contact with each other. Even if a heat dissipation structure is provided, it can only achieve heat dissipation of the entire spliced ​​battery module, resulting in an overall unsatisfactory heat dissipation effect. In view of the above problems, this application proposes the following solutions:

[0043] Reference Figure 1-Figure 8 The present invention provides a battery pack, comprising:

[0044] A battery pack housing 1, wherein a storage cavity is provided inside the battery pack housing 1 for storing batteries, wherein the batteries include a plurality of battery modules 2;

[0045] A support assembly, including a bottom support plate 3 and a support member. A connecting member is provided at the bottom end of the battery pack housing 1. The bottom support plate 3 is connected to the battery pack housing 1 through the connecting member. The support member is assembled on the bottom support plate 3 to fix a plurality of battery modules 2.

[0046] The heat dissipation assembly includes a first heat dissipation member and a plurality of second heat dissipation members. The first heat dissipation member is arranged on the support member for air cooling and dissipating heat to the plurality of battery modules 2. The second heat dissipation members are respectively arranged on the support member for water cooling and dissipating heat to the plurality of battery modules 2.

[0047] Specifically, the battery pack shell 1 and the support member are split structures, and a plurality of battery modules 2 are installed on the support member. After installation, the support member is directly installed on the battery pack shell 1, thereby realizing convenient installation of the battery module 2 in the battery pack shell 1 and improving the overall assembly efficiency. At the same time, after installation, the first heat sink and the second heat sink are connected to realize heat dissipation inside the battery pack, thereby improving the overall installation efficiency.

[0048] As an optional embodiment, the support member includes: a main support frame 4, fixedly connected to the middle of the top end of the bottom support plate 3;

[0049] A plurality of partitioning and positioning plates 5 are respectively arranged on both sides of the main support frame 4 along the axial direction, and the battery module 2 is installed between two adjacent partitioning and positioning plates 5. The end of the partitioning and positioning plate 5 away from the main support frame 4 is connected to a side plate 6;

[0050] A first limiting member is provided on the partitioning and positioning plate 5, and two partitioning and positioning plates 5 located on the same axis are connected by limiting positions through the first limiting member;

[0051] The second limiting member is arranged on the separation and positioning plate 5 and is used for clamping the battery module 2 .

[0052] In one embodiment of the present invention, referring to Figure 3 , Figure 5 The main support frame 4 is fixed to the bottom support plate 3, and the frame is spliced ​​by inserting the partition positioning plates 5 on both sides of the main support frame 4. A number of battery modules 2 are placed in the frame and inserted through the side plates 6 to achieve stable installation of the battery modules 2.

[0053] As an optional embodiment, a plurality of first grooves 7 are provided at equal intervals along the axial direction on both sides of the main support frame 4, and the first limiting member includes a connecting block 8 fixedly connected to one side of the partition positioning plate 5, the connecting block 8 is adapted to the first groove 7, and the opposite sides of the two connecting blocks 8 located on the same axis are respectively fixedly connected to one end of the support rod 9, and the other end of the support rod 9 is fixedly connected to a buckle 10, and the two buckles 10 are snap-connected.

[0054] In one embodiment of the present invention, referring to Figure 3 , Figure 8 The connecting block 8 is slidably inserted into the first groove 7 and is limited by the provided buckle 10.

[0055] Specifically, the buckle 10 is an arc-shaped structure and is made of elastic metal. It is deformed when buckled and reset after buckling to achieve the clamping connection between the two buckles 10, so that it applies vertical and lateral forces to ensure the stable installation of the partition positioning plate 5.

[0056] As an optional embodiment, a plurality of second grooves 11 are provided on the side plate 6 at equal intervals in the axial direction, and the second grooves 11 are adapted to the partition positioning plate 5. The second limiting member includes a sliding rod 12 slidably connected to both sides of the partition positioning plate 5, one end of the sliding rod 12 is fixedly connected to a clamping plate 13, one side of the clamping plate 13 is in contact with the side wall of the battery module 2, the other end of the sliding rod 12 extends into the partition positioning plate 5 and is fixedly connected to one end of a toggle rod 14, and the other end of the toggle rod 14 extends out of the partition positioning plate 5 and is in contact with the inner wall of the second groove 11.

[0057] In one embodiment of the present invention, referring to Figure 3 , Figure 4 The clamping plate 13 is slidably connected to the partition positioning plate 5 through the sliding rod 12, and its sliding is controlled by the toggle rod 14. When the side plate 6 is inserted downward, the clamping plate 13 is driven to move by squeezing the extended end of the toggle rod 14 to clamp the battery module 2.

[0058] Specifically, the mounting point of the side plate 6 is in sliding contact with the side end of the battery module 2 .

[0059] As an optional embodiment, the first heat dissipation component includes two supporting bases 15 fixedly connected to both sides of the bottom end inside the main supporting frame 4, two turntables 16 are rotatably connected to the supporting base 15, the two turntables 16 are arranged in parallel and tooth grooves are opened on the inner walls of the turntables 16, two gears 17 are rotatably connected to the supporting base 15, the two gears 17 are respectively meshed with the two turntables 16, and the two gears 17 are meshed, one of the turntables 16 is fixedly connected to a rotating tube 18 in the middle, and the other turntable 16 is fixedly connected to a rotating rod 19 in the middle, and the rotating rod 19 passes through the rotating tube 18, and the two side walls of the main supporting frame 4 are fixedly connected to circulation pipes 20, and one end of the rotating rod 19 and the rotating tube 18 extends into the circulation pipe 20 and is fixedly connected to fan blades 21.

[0060] In one embodiment of the present invention, referring to Figure 5 , Figure 6 The support base 15 is fixed to the bottom end of the main support frame 4, and the turntable 16 rotates on the support base 15, and the two turntables 16 are linked by two mutually meshing gears 17, that is, when one of the turntables 16 is driven, the other turntable 16 can be driven to rotate in the opposite direction, thereby driving the fan blades 21 on the rotating tube 18 and the rotating rod 19 to rotate in the opposite direction. The inner fan blades are used to extract the internal hot air, and the outer fan blades are used to exhaust air to the outside. The two cooperate in the same heat dissipation port to increase the overall air flow rate, thereby improving the overall heat dissipation effect.

[0061] Specifically, a long hole is further provided on the outer side wall of the main support frame 4 for communicating with the gap in which the battery module 2 is placed, so as to achieve air cooling and heat dissipation of the battery module 2 .

[0062] Specifically, the battery pack housing 1 is also provided with an air inlet to ensure internal air circulation.

[0063] As an optional implementation, the second heat sink includes a circulation pipe 22 fixedly connected to the clamping plate 13, and both ends of the circulation pipe 22 are respectively used for communicating with external cooling liquid.

[0064] In one embodiment of the present invention, referring to Figure 7 The circulation pipe 22 inside the clamping plate 13 is distributed in a serpentine shape. When the clamping plate 13 contacts and clamps the battery module 2, the battery module 2 is water-cooled by the circulating coolant flowing in the circulating pipe 22, thereby improving the overall heat dissipation effect.

[0065] As an optional embodiment, the battery pack shell 1 includes a bottom shell 101, a side shell 102 and a top shell 103. The bottom shell 101 and the top shell 103 are respectively connected to the bottom and top of the side shell 102 by a plurality of bolts. A protrusion 30 is provided at the bottom of the top shell 103, and the protrusion 30 is adapted to the top of the main support frame 4. A vent 23 is opened on the side wall of the side shell 102, and the circulation duct 20 is connected to the vent 23.

[0066] In one embodiment of the present invention, referring to Figure 1 The battery pack shell 1 is composed of a bottom shell 101, a side shell 102 and a top shell 103. Before installation, the bottom shell 101 is first installed on the side shell 102, and then the bottom support plate 3 is installed and then the top shell 103 is installed. In addition, the flow duct 20 is connected to the vent 23, and the protrusion 30 is buckled on the top of the main support frame 4 to achieve the closure of the main support frame 4.

[0067] As an optional embodiment, the connecting member includes a plurality of fixed columns 24 fixedly connected to the top of the bottom shell 101, a plurality of strip plates 25 are fixedly connected to the top of the fixed columns 24 along the circumferential direction, a clamping joint 26 is fixedly connected to the top of the strip plates 25, a plurality of through holes 27 are opened on the bottom support plate 3, the plurality of through holes 27 correspond one-to-one to the plurality of fixed columns 24, and the clamping joint 26 extends through the through holes 27 to be limitedly connected to the bottom support plate 3.

[0068] In one embodiment of the present invention, referring to Figure 2 The fixing column 24 extends into the through hole 27, and the clamping joint 26 at the top of the strip plate 25 extends out of the through hole 27 and is clamped on the top of the bottom support plate 3, thereby realizing stable and convenient installation between the bottom support plate 3 and the battery pack shell 1.

[0069] Specifically, the strip plate 25 is made of elastic metal material and can undergo elastic deformation, thereby ensuring that it is stably clamped on the top of the through hole 27 .

[0070] As an optional embodiment, a plurality of third grooves 28 are provided at the bottom end of the side plate 6. The third grooves 28 are located directly above the through holes 27. A limiting hole 29 is provided on the inner side wall of the third grooves 28. The clamping joint 26 extends into the third grooves 28 and is limitedly connected to the limiting hole 29.

[0071] In one embodiment of the present invention, referring to Figure 2 , several third grooves 28 correspond to some through holes 27 one by one, and the corresponding strip plate 25 here is longer than other strip plates 25, so that it can extend into the third groove 28 and be snapped into the limiting hole 29, thereby realizing a stable connection between the side plate 6 and the bottom shell 101, thereby ensuring the stability of the overall structure after installation.

[0072] A battery pack assembly method comprises the following steps:

[0073] Installing a plurality of battery modules 2 on the bottom support plate 3 through support members;

[0074] Specifically, the partitioning and positioning plates 5 are first installed on the main support frame 4 along the first grooves 7 , the battery module 2 is placed in the gap between two adjacent partitioning and positioning plates 5 , and the side plates 6 are plugged onto the partitioning and positioning plates 5 .

[0075] Install the bottom support plate 3 in the battery pack housing 1;

[0076] After the overall installation is completed, the bottom support plate 3 is placed into the battery pack housing 1 , and the side plate 6 is pressed so that the clamping connector 26 is clamped into the top of the through hole 27 and the limiting hole 29 in the third groove 28 .

[0077] The first heat sink is used for air cooling and the second heat sink is used for water cooling.

[0078] After installation, the circulation pipe 20 is connected to the vent 23 for air cooling and heat dissipation, and the circulation pipe 22 is connected to the external coolant for water cooling and heat dissipation.

[0079] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A battery pack, characterized in that: include: A battery pack housing (1), wherein a storage cavity is provided inside the battery pack housing (1) for storing batteries, wherein the batteries include a plurality of battery modules (2); A support assembly, comprising a bottom support plate (3) and a support member, wherein a connecting member is provided at the bottom end of the battery pack housing (1), the bottom support plate (3) is connected to the battery pack housing (1) via the connecting member, and the support member is assembled on the bottom support plate (3) for fixing a plurality of the battery modules (2); The heat dissipation assembly comprises a first heat dissipation member and a plurality of second heat dissipation members, wherein the first heat dissipation member is arranged on the support member for air cooling the plurality of battery modules (2), and the plurality of second heat dissipation members are respectively arranged on the support member for water cooling the plurality of battery modules (2).

2. A battery pack according to claim 1, characterized in that: The support member comprises: A main support frame (4) is fixedly connected to the middle of the top end of the bottom support plate (3); A plurality of partition positioning plates (5) are respectively arranged on both sides of the main support frame (4) along the axial direction, and the battery module (2) is installed between two adjacent partition positioning plates (5); one end of the partition positioning plate (5) away from the main support frame (4) is connected to a side plate (6); A first limiting member is arranged on the separation positioning plate (5), and the two separation positioning plates (5) located on the same axis are connected by limiting the first limiting member; A second limiting member is arranged on the separation positioning plate (5) and is used to clamp the battery module (2).

3. A battery pack according to claim 2, characterized in that: A plurality of first grooves (7) are respectively provided at equal intervals along the axial direction on both sides of the main support frame (4); the first limiting member comprises a connecting block (8) fixedly connected to one side of the partition positioning plate (5); the connecting block (8) is adapted to the first groove (7); one end of a support rod (9) is respectively fixedly connected to the opposite sides of the two connecting blocks (8) located on the same axis; the other end of the support rod (9) is fixedly connected to a buckle (10); and the two buckles (10) are buckled.

4. A battery pack according to claim 3, characterized in that: A plurality of second grooves (11) are provided on the side plate (6) at equal intervals in the axial direction, and the second grooves (11) are adapted to the partition positioning plate (5). The second limiting member comprises a sliding rod (12) slidably connected to both sides of the partition positioning plate (5), one end of the sliding rod (12) is fixedly connected to a clamping plate (13), one side of the clamping plate (13) is in contact with the side wall of the battery module (2), the other end of the sliding rod (12) extends into the partition positioning plate (5) and is fixedly connected to one end of a toggle rod (14), and the other end of the toggle rod (14) extends out of the partition positioning plate (5) and is in contact with the inner wall of the second groove (11).

5. A battery pack according to claim 4, characterized in that: The first heat sink comprises two support bases (15) fixedly connected to both sides of the bottom end of the main support frame (4); two rotating disks (16) are rotatably connected to the support base (15); the two rotating disks (16) are arranged in parallel and tooth grooves are provided on the inner walls of the rotating disks (16); two gears (17) are rotatably connected to the support base (15); the two gears (17) are respectively meshed with the two rotating disks (16); and the two gears (17) are meshed; a rotating tube (18) is fixedly connected to the middle of one of the rotating disks (16); a rotating rod (19) is fixedly connected to the middle of the other rotating disk (16); the rotating rod (19) penetrates the rotating tube (18); circulation pipes (20) are fixedly connected to both side walls of the main support frame (4); one end of the rotating rod (19) and the rotating tube (18) extends into the circulation pipe (20) and is fixedly connected to a fan blade (21).

6. A battery pack according to claim 4, characterized in that: The second heat sink comprises a circulation pipe (22) fixedly connected to the clamping plate (13), and both ends of the circulation pipe (22) are respectively used for communicating with external cooling liquid.

7. A battery pack according to claim 5, characterized in that: The battery pack shell (1) comprises a bottom shell (101), a side shell (102) and a top shell (103); the bottom shell (101) and the top shell (103) are respectively connected to the bottom and top of the side shell (102) by a plurality of bolts; a protrusion (30) is provided at the bottom of the top shell (103); the protrusion (30) is adapted to the top of the main support frame (4); a vent (23) is provided on the side wall of the side shell (102); and the circulation duct (20) is connected to the vent (23).

8. A battery pack according to claim 7, characterized in that: The connecting member comprises a plurality of fixing columns (24) fixedly connected to the top of the bottom shell (101); a plurality of strip plates (25) are fixedly connected to the top of the fixing columns (24) along the circumferential direction; a clamping joint (26) is fixedly connected to the top of the strip plates (25); a plurality of through holes (27) are provided on the bottom support plate (3); the plurality of through holes (27) correspond to the plurality of fixing columns (24) in a one-to-one manner; and the clamping joint (26) extends through the through holes (27) to be limitedly connected to the bottom support plate (3).

9. A battery pack according to claim 8, characterized in that: A plurality of third grooves (28) are provided at the bottom end of the side plate (6), the third grooves (28) are located directly above the through hole (27), a limiting hole (29) is provided on the inner side wall of the third groove (28), and the clamping joint (26) extends into the third groove (28) and is limitedly connected to the limiting hole (29).

10. A battery pack assembly method, applicable to the battery pack according to claim 1, characterized in that: The following steps are involved: Mounting a plurality of battery modules (2) on a bottom support plate (3) via support members; Installing the bottom support plate (3) in the battery pack housing (1); The first heat sink is used for air cooling and the second heat sink is used for water cooling.

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