A battery pack and a battery pack assembly method

Abstract

The application relates to the technical field of batteries, and discloses a battery pack and a battery pack assembling method, which comprise a battery pack shell, a storage cavity is arranged in the battery pack shell, the storage cavity is used for storing batteries, the batteries comprise a plurality of battery modules; a supporting assembly which comprises a bottom supporting plate and a supporting piece, a connecting piece is arranged at the bottom end of 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 the plurality of battery modules; a heat dissipation assembly which 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 air cooling and heat dissipation of the plurality of battery modules, and the plurality of second heat dissipation pieces are arranged on the supporting piece respectively and used for water cooling and heat dissipation of the plurality of battery modules. The application has the advantages of simple structure, convenient installation, efficient assembling of the battery pack, improved assembling efficiency and stable heat dissipation in the subsequent use process.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack and a battery pack assembly method. Background Technology

[0002] With the development of new energy vehicles, batteries, as a power source for new energy, have also seen significant development. When batteries are used in new energy vehicles, they are first assembled into battery modules, and then these battery modules are assembled into battery packs, thus providing sufficient energy for the new energy vehicle to move.

[0003] In existing technologies, battery modules are mostly installed directly inside the battery pack housing, requiring the assembly of several battery modules one by one. This results in low assembly efficiency for the entire battery pack. Furthermore, after installation, the battery modules are mostly in contact with each other, and even if a heat dissipation structure is set up, it only achieves heat dissipation for the entire assembled battery module, resulting in an unsatisfactory overall heat dissipation effect.

[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 purpose of this invention is to provide a battery pack and a battery pack assembly method to solve the problems existing in the prior art.

[0006] To achieve the above objectives, 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] The support assembly includes a bottom support plate and a support member. A connector is provided at the bottom of the inside of the battery pack housing. The bottom support plate is connected to the battery pack housing through the connector. The support member is assembled on the bottom support plate to fix several battery modules.

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

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

[0011] Several partition positioning plates are respectively arranged on both sides of the main support frame along the axial direction. The battery module is installed between two adjacent partition positioning plates. A side plate is connected to the end of the partition positioning plate away from the main support frame.

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

[0013] The second limiting member is disposed on the partition positioning plate and is used to clamp the battery module.

[0014] According to a battery pack provided by the present invention, a plurality of first grooves are provided on both sides of the main support frame at equal intervals along the axial direction. 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. One end of a support rod is fixedly connected to the opposite side of the two connecting blocks located on the same axis. The other end of the support rod is fixedly connected to a buckle, and the two buckles are engaged.

[0015] According to a battery pack provided by the present invention, a plurality of second grooves are equally spaced along the axial direction on the side plate. The second grooves are adapted to the partition positioning plate. The second limiting member includes a slide rod slidably connected to both sides of the partition positioning plate. One end of the slide 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 slide 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 support bases fixedly connected to both sides of the bottom end inside the main support frame. Two turntables are rotatably connected to the support bases. The two turntables are arranged in parallel and each turntable has a toothed groove on its inner wall. Two gears are rotatably connected to the support bases. The two gears mesh with the two turntables respectively. A rotating tube is fixedly connected to the middle of one turntable, and a rotating rod is fixedly connected to the middle of the other turntable. The rotating rod passes through the rotating tube. Flow pipes are fixedly connected to both sides of the main support frame. One end of the rotating rod and the rotating tube extends into the flow pipe and is fixedly connected to a fan blade.

[0017] According to a battery pack provided by the present invention, the second heat dissipation component includes a circulation pipe fixedly connected in the clamping plate, and the two ends of the circulation pipe are respectively used for communication with external coolant.

[0018] According to a battery pack provided by the present invention, the battery pack housing includes a bottom housing, a side housing, and a top housing. The bottom housing and the top housing are respectively connected to the bottom and top of the side housing by a plurality of bolts. The bottom of the top housing is provided with a protrusion that is adapted to the top of the main support frame. A ventilation opening is provided on the side wall of the side housing, and the flow pipe communicates with the ventilation opening.

[0019] According to a battery pack provided by the present invention, the connector includes a plurality of fixing posts fixedly connected to the top of the bottom housing, a plurality of strip plates fixedly connected to the top of the fixing posts along the circumferential direction, a snap-fit ​​connector fixedly connected to the top of the strip plates, a plurality of through holes being provided on the bottom support plate, the plurality of through holes corresponding one-to-one with the plurality of fixing posts, and the snap-fit ​​connector extending through the through holes and being limited and 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 hole, and a limiting hole is provided on the inner side wall of the third groove. The snap connector extends into the third groove and is limited and connected to the limiting hole.

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

[0022] Several battery modules are mounted on the bottom support plate using support components;

[0023] Install the bottom support plate inside the battery pack housing;

[0024] Air cooling is achieved through the first heat sink, while water cooling is achieved through the second heat sink.

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

[0026] This invention provides a battery pack and its assembly method. The battery pack housing and support are separate structures. Several battery modules are installed on the support, and then the support is directly installed on the battery pack housing. This facilitates the installation of battery modules within the battery pack housing, improving overall assembly efficiency. Simultaneously, after installation, the first and second heat dissipation components are connected to achieve internal heat dissipation of the battery pack, further enhancing overall installation efficiency. This application features a simple structure, convenient installation, and achieves efficient battery pack assembly, improving assembly efficiency and ensuring stable heat dissipation during subsequent use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0029] Figure 2 For the present invention Figure 1 Enlarged view of a portion of point A in the middle;

[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 partition positioning plate structure 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 Enlarged view of a section at 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 limiting member of the present invention;

[0036] The components include: 1. Battery pack housing; 101. Bottom housing; 102. Side housing; 103. Top housing; 2. Battery module; 3. Bottom support plate; 4. Main support frame; 5. Separating 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. Actuating rod; 15. Support base; 16. Turntable; 17. Gear; 18. Rotating tube; 19. Rotating rod; 20. Flow pipe; 21. Fan blade; 22. Circulation pipe; 23. Ventilation opening; 24. Fixing column; 25. Strip plate; 26. Clip connector; 27. Through hole; 28. Third groove; 29. ​​Limiting hole; 30. Protrusion. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In related technologies, a battery pack and its assembly method are disclosed, comprising: a plurality of cell stacks, including a plurality of cell stacks along one direction; a pack housing for housing the plurality of cell stacks; a fixing bracket disposed between the plurality of cell stacks and the pack housing and between the plurality of cell stacks; and a fastening component for fastening the fixing bracket to the pack housing, the fixing bracket being configured to contact the plurality of cell stacks on the upper side.

[0040] In related technologies, a battery pack is disclosed, comprising: a housing having a receiving space, the housing having a first direction and a second direction; a plurality of battery packs housed within the receiving space, wherein multiple individual cells in each battery pack are arranged along the second direction; a side plate disposed on the side of the plurality of battery packs along the first direction; a movable plate disposed on the side of the battery packs along the second direction and connected to the side plate, the movable plate being movable along the second direction to adjust the preload applied to the battery packs, and the side plate and / or the movable plate being fixed to the housing to define the installation position of the battery packs; and a cover plate covering the housing.

[0041] In related technologies, a battery pack and its assembly method are disclosed. The battery pack includes a housing, a liquid cooling plate, a thermally conductive fixing layer, and multiple battery cells. The multiple battery cells are arranged in an array inside the housing; the liquid cooling plate covers the housing; the thermally conductive fixing layer fills and solidifies the gap between the battery cells and the housing, and is also sandwiched between the shoulder of the battery cell and the liquid cooling plate, and covers the terminal post of the battery cell. An avoidance channel is formed on the thermally conductive fixing layer, and the avoidance channel is directly opposite the explosion-proof valve of the battery cell.

[0042] In the aforementioned related technologies, battery modules are mostly directly installed inside the battery pack housing, requiring the individual splicing and installation of several battery modules. This results in low assembly efficiency for the entire battery pack. Furthermore, after installation, the battery modules are mostly in contact with each other, and even with heat dissipation structures, the heat dissipation only affects the entire assembled battery module, leading to an unsatisfactory overall heat dissipation effect. To address these issues, this application proposes the following solution:

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

[0044] The battery pack housing 1 has a storage cavity inside for storing batteries, and the batteries include several battery modules 2.

[0045] The support assembly includes a bottom support plate 3 and a support member. A connector is provided at the bottom of the battery pack housing 1. The bottom support plate 3 is connected to the battery pack housing 1 through the connector. The support member is assembled on the bottom support plate 3 to fix several battery modules 2.

[0046] The heat dissipation assembly includes a first heat dissipation component and several second heat dissipation components. The first heat dissipation component is disposed on the support component for air cooling of several battery modules 2, and the several second heat dissipation components are respectively disposed on the support component for water cooling of several battery modules 2.

[0047] Specifically, the battery pack housing 1 and the support are separate structures. Several battery modules 2 are installed on the support, and then the support is directly installed on the battery pack housing 1. This enables convenient installation of the battery modules 2 inside the battery pack housing 1, improving the overall assembly efficiency. At the same time, after installation, the first heat sink and the second heat sink are connected to achieve heat dissipation inside the battery pack, further improving the overall installation efficiency.

[0048] As an optional implementation, the support includes: a main support frame 4, which is fixedly connected to the top center of the bottom support plate 3;

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

[0050] The first limiting member is set on the partition positioning plate 5, and the two partition positioning plates 5 located on the same axis are connected by the first limiting member.

[0051] The second limiting component is set on the partition positioning plate 5 and is used to clamp the battery module 2.

[0052] In one embodiment of the present invention, reference is made to Figure 3 , Figure 5 The main support frame 4 is fixed to the bottom support plate 3. The frame is spliced ​​by inserting the partition positioning plates 5 on both sides of the main support frame 4. Several battery modules 2 are placed in the frame and the battery modules 2 are stably installed by inserting the side plates 6.

[0053] As an optional implementation, the main support frame 4 has several first grooves 7 evenly spaced along the axial direction on both sides. 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. One end of the support rod 9 is fixedly connected to the opposite side 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 engaged.

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

[0055] Specifically, the buckle 10 has an arc-shaped structure and is made of elastic metal. It deforms when fastened and resets after fastening to achieve the engagement of the two buckles 10, so as to apply vertical and horizontal forces and ensure the stable installation of the partition positioning plate 5.

[0056] As an optional implementation, a plurality of second grooves 11 are equally spaced along the axial direction on the side plate 6. The second grooves 11 are adapted to the partition positioning plate 5. The second limiting member includes a slide rod 12 slidably connected to both sides of the partition positioning plate 5. One end of the slide 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 slide rod 12 extends into the partition positioning plate 5 and is fixedly connected to one end of a toggle rod 14. 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, reference is made to Figure 3 , Figure 4 The clamping plate 13 is slidably connected to the partition positioning plate 5 via the slide 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 moved by squeezing the protruding end of the toggle rod 14, thereby clamping the battery module 2.

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

[0059] As an optional implementation, the first heat sink includes two support bases 15 fixedly connected to the two sides of the bottom end inside the main support frame 4. Two turntables 16 are rotatably connected to the support bases 15. The two turntables 16 are arranged in parallel and each of the turntables 16 has a toothed groove on its inner wall. Two gears 17 are rotatably connected to the support bases 15. The two gears 17 mesh with the two turntables 16 respectively. A rotating tube 18 is fixedly connected to the middle of one turntable 16, and a rotating rod 19 is fixedly connected to the middle of the other turntable 16. The rotating rod 19 passes through the rotating tube 18. Flow pipes 20 are fixedly connected to both sides of the main support frame 4. One end of the rotating rod 19 and the rotating tube 18 extends into the flow pipe 20 and is fixedly connected to a fan blade 21.

[0060] In one embodiment of the present invention, reference is made to Figure 5 , Figure 6 The support base 15 is fixed inside the bottom of the main support frame 4. The turntable 16 rotates on the support base 15, and the two turntables 16 are linked by two meshing gears 17. That is, when one turntable 16 is driven, the other turntable 16 can be driven to rotate in the opposite direction, which in turn drives 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 draw out the internal hot air, and the outer fan blades are used to exhaust the air to the outside. The two work together in the same heat dissipation port to increase the overall airflow speed, thereby improving the overall heat dissipation effect.

[0061] Specifically, the outer wall of the main support frame 4 is also provided with elongated holes for communication with the gap where the battery module 2 is placed, so as to realize air cooling of the battery module 2.

[0062] Specifically, the battery pack housing 1 is also equipped 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 within the clamping plate 13, with both ends of the circulation pipe 22 connected to external coolant.

[0064] In one embodiment of the present invention, reference is made to Figure 7 The circulation pipes 22 inside the clamping plate 13 are distributed in a serpentine pattern. When the clamping plate 13 contacts and clamps the battery module 2, the coolant circulates in the circulation pipes 22 to cool the battery module 2, thereby improving the overall heat dissipation effect.

[0065] As an optional implementation, the battery pack housing 1 includes a bottom housing 101, a side housing 102, and a top housing 103. The bottom housing 101 and the top housing 103 are respectively connected to the bottom and top of the side housing 102 by several bolts. The bottom of the top housing 103 is provided with a protrusion 30, which is adapted to the top of the main support frame 4. A vent 23 is provided on the side wall of the side housing 102, and the flow pipe 20 is connected to the vent 23.

[0066] In one embodiment of the present invention, reference is made to Figure 1 The battery pack housing 1 consists of a bottom housing 101, a side housing 102 and a top housing 103. Before installation, the bottom housing 101 is installed on the side housing 102, the bottom support plate 3 is installed and then the top housing 103 is installed. In addition, the flow pipe 20 is connected to the ventilation port 23, and the protrusion 30 is fastened to the top of the main support frame 4 to realize the closure of the main support frame 4.

[0067] As an optional implementation, the connector includes a plurality of fixed posts 24 fixedly connected to the top of the bottom housing 101. A plurality of strip plates 25 are fixedly connected to the top of the fixed posts 24 along the circumferential direction. A snap-fit ​​connector 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 one-to-one with the plurality of fixed posts 24. The snap-fit ​​connector 26 extends through the through holes 27 and is limited and connected to the bottom support plate 3.

[0068] In one embodiment of the present invention, reference is made to Figure 2 The fixing post 24 extends into the through hole 27, and the snap connector 26 at the top of the strip plate 25 extends out of the through hole 27 and snaps onto the top of the bottom support plate 3, so as to achieve stable and convenient installation between the bottom support plate 3 and the battery pack housing 1.

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

[0070] As an optional implementation, the bottom end of the side plate 6 is provided with a plurality of third grooves 28, the third grooves 28 being located directly above the through hole 27, and the inner side wall of the third grooves 28 is provided with limiting holes 29, and the snap connector 26 extends into the third grooves 28 and is limited and connected to the limiting holes 29.

[0071] In one embodiment of the present invention, reference is made to Figure 2 Several third grooves 28 correspond one-to-one with some through holes 27. The corresponding strip plate 25 is longer than other strip plates 25, so that it can extend into the third groove 28 and be engaged in the limiting hole 29, so as to achieve 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 includes the following steps:

[0073] Several battery modules 2 are mounted on the bottom support plate 3 using support members;

[0074] Specifically, the partition positioning plate 5 is first installed on the main support frame 4 along the first groove 7, the battery module 2 is placed in the gap between two adjacent partition positioning plates 5, and the side plate 6 is inserted into the partition positioning plate 5.

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

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

[0077] Air cooling is achieved through the first heat sink, while water cooling is achieved through the second heat sink.

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

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

[0080] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A battery pack, characterized in that, include: A battery pack housing (1) is provided inside the battery pack housing (1) for storing batteries, and the batteries include several battery modules (2); The support assembly includes a bottom support plate (3) and a support member. A connector is provided at the bottom of the battery pack housing (1). The bottom support plate (3) is connected to the battery pack housing (1) through the connector. The support member is assembled on the bottom support plate (3) to fix several battery modules (2). The heat dissipation assembly includes a first heat dissipation component and several second heat dissipation components. The first heat dissipation component is disposed on the support component for air cooling of several battery modules (2), and several second heat dissipation components are respectively disposed on the support component for water cooling of several battery modules (2). The support member includes: The main support frame (4) is fixedly connected to the top center of the bottom support plate (3); Several partition positioning plates (5) are respectively arranged on both sides of the main support frame (4) along the axial direction. The battery module (2) is installed between two adjacent partition positioning plates (5). A side plate (6) is connected to one end of the partition positioning plate (5) away from the main support frame (4). The first limiting member is provided on the partition positioning plate (5), and the two partition positioning plates (5) located on the same axis are connected by the first limiting member. The second limiting member is disposed on the partition positioning plate (5) and is used to clamp the battery module (2); The first heat sink includes two support bases (15) fixedly connected to the two sides of the bottom inside the main support frame (4). Two turntables (16) are rotatably connected to the support bases (15). The two turntables (16) are arranged in parallel and each turntable (16) has a toothed groove on its inner wall. Two gears (17) are rotatably connected to the support bases (15). The two gears (17) mesh with the two turntables (16) respectively. A rotating tube (18) is fixedly connected to the middle of one turntable (16), and a rotating rod (19) is fixedly connected to the middle of the other turntable (16). The rotating rod (19) passes through the rotating tube (18). Flow pipes (20) are fixedly connected to both sides of the main support frame (4). One end of the rotating rod (19) and the rotating tube (18) extends into the flow pipe (20) and is fixedly connected with a fan blade (21).

2. The battery pack according to claim 1, characterized in that: The main support frame (4) has several first grooves (7) evenly spaced along the axial direction on both sides. 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). The two connecting blocks (8) located on the same axis are respectively fixedly connected to one end of a support rod (9) on opposite sides. The other end of the support rod (9) is fixedly connected to a buckle (10). The two buckles (10) are engaged.

3. A battery pack according to claim 2, characterized in that: The side plate (6) is provided with a plurality of second grooves (11) at equal intervals along the axial direction. The second grooves (11) are adapted to the partition positioning plate (5). The second limiting member includes a slide rod (12) slidably connected to both sides of the partition positioning plate (5). One end of the slide 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 slide rod (12) extends into the partition positioning plate (5) and is fixedly connected to one end of a toggle rod (14). 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).

4. A battery pack according to claim 3, characterized in that: The second heat sink includes a circulation pipe (22) fixedly connected in the clamping plate (13), and the two ends of the circulation pipe (22) are respectively used for external coolant communication.

5. A battery pack according to claim 4, characterized in that: The battery pack housing (1) includes a bottom housing (101), a side housing (102) and a top housing (103). The bottom housing (101) and the top housing (103) are respectively connected to the bottom and top of the side housing (102) by several bolts. The bottom of the top housing (103) is provided with a protrusion (30), which is adapted to the top of the main support frame (4). A vent (23) is provided on the side wall of the side housing (102), and the flow pipe (20) is connected to the vent (23).

6. A battery pack according to claim 5, characterized in that: The connector includes several fixed posts (24) fixedly connected to the top of the bottom housing (101). Several strip plates (25) are fixedly connected to the top of the fixed posts (24) along the circumferential direction. A snap connector (26) is fixedly connected to the top of the strip plates (25). Several through holes (27) are opened on the bottom support plate (3). The several through holes (27) correspond one-to-one with the several fixed posts (24). The snap connector (26) extends through the through holes (27) and is limited and connected to the bottom support plate (3).

7. A battery pack according to claim 6, characterized in that: The bottom end of the side plate (6) is provided with a plurality of third grooves (28), the third grooves (28) are located directly above the through hole (27), and the inner side wall of the third grooves (28) is provided with limiting holes (29), and the snap connector (26) extends into the third grooves (28) and is limited and connected to the limiting holes (29).

8. A battery pack assembly method, applicable to the battery pack described in claim 1, characterized in that, Includes the following steps: Several battery modules (2) are mounted on the bottom support plate (3) by means of support members; Install the bottom support plate (3) inside the battery pack housing (1); Air cooling is achieved through the first heat sink, while water cooling is achieved through the second heat sink.

Images