Battery pack

Abstract

The utility model discloses a battery pack which comprises at least two battery modules, one end of an X axis is provided with a concave assembly groove, electrodes of the battery modules extend into the assembly groove, and a wire bar is integrated between each electrode; the end cover is assembled at one end, on the X axis, of the battery module, and a quick-connection socket is arranged on the end cover; and a battery management system, wherein a quick connection wire is inserted between the battery management system and the quick connection socket. According to the utility model, the connection complexity between the battery modules is greatly simplified, the occupation of external space is reduced, and the end cover effectively plays a protection role, so that the structural integrity of the battery pack is enhanced, and a battery management system is conveniently and quickly connected.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack. BACKGROUND

[0002] With the rapid development of electric vehicles and energy storage system technology, the demand for high-performance, high-energy density battery packs is increasing. In the design of traditional multi-layer cell group battery packs, the wiring between the liquid cooling pipes and the cells is mostly arranged on the outside of the battery module. This design not only is susceptible to external environmental influences, reducing the safety and reliability of the system, but also increases the difficulty of system maintenance due to the complex wiring.

[0003] To improve this problem, some design schemes choose to add an electrical compartment on one side of the battery module to accommodate the wiring and the battery management system (BMS). However, this approach, while optimizing the internal structure to some extent, results in an increase in the overall size of the battery pack due to the large size of the battery management system, which in turn requires more assembly space, making it difficult to efficiently layout in limited space. SUMMARY

[0004] To overcome at least one of the deficiencies of the prior art described above, the utility model provides a battery pack. The problem of large space occupation and poor pipe protection in traditional battery pack design can be solved.

[0005] The utility model employs the technical scheme that:

[0006] A battery pack includes at least two battery modules stacked along the Z-axis direction. Each battery module is provided with an internally recessed assembly slot at one end of the X-axis. The assembly slots of each battery module are interconnected. The electrodes of each battery module extend into the respective assembly slots. Wire harnesses for electrical connection are integrated between each pair of electrodes. An end cover is assembled at one end of all the battery modules along the X-axis to cover all the assembly slots. The end cover is provided with quick-connection sockets for connecting the wire harnesses. A battery management system is connected to the quick-connection sockets via quick-connection wires.

[0007] By adopting the above scheme, the assembly slots provide space for the integration of the electrodes. The electrodes extend into the respective assembly slots and are electrically connected via the integrated wire harnesses, greatly simplifying the connection complexity between the battery modules and reducing the occupation of external space. The end cover covers the assembly slots of all the battery modules, effectively providing protection. The integrated quick-connection sockets on the end cover provide convenient external connection points for the wire harnesses, enhancing the structural integrity of the battery pack, facilitating the quick connection of the battery management system, and improving the maintainability and flexibility of the system.

[0008] Further, the battery module comprises: a battery frame, which is open at both ends in the Z-axis direction and is used for assembly with the liquid cooling plate group, an assembly groove is arranged on the battery frame, and the battery frame is further provided with a battery cell cavity arranged at intervals with the assembly groove along the X-axis direction; and a plurality of battery cell groups, which are arranged along the Y-axis direction in the battery cell cavity, and each battery cell group is stacked by a plurality of battery cells along the X-axis direction.

[0009] By adopting the above scheme, the space in the battery frame is maximized. This not only improves the energy density of the battery pack, but also reduces the overall size and weight of the battery pack. The liquid cooling plate group can be easily inserted into the battery frame to exchange heat with the battery cells, reduce the temperature of the battery pack, and prolong the service life of the battery cells.

[0010] Further, the battery cell cavity and the assembly groove are provided with a spacing plate, and the spacing plate is provided with transverse and longitudinal staggered reinforcing ribs.

[0011] By adopting the above scheme, the mechanical strength of the spacing plate can be significantly improved, preventing the spacing plate from deforming or breaking, thereby maintaining the stability and integrity of the battery module structure.

[0012] Further, the battery cell cavity and the assembly groove are provided with a spacing plate, and the spacing plate is provided with protruding retaining ribs, and the retaining ribs abut or assemble with the end cover.

[0013] By adopting the above scheme, the design of the retaining rib enhances the connection strength between the spacing plate and the end cover, so that the battery module can remain stable when subjected to external impact or vibration. This structural stability helps to prevent relative movement or misalignment between the battery cells, thereby reducing the risk of internal short circuit of the battery module.

[0014] Further, it further comprises a liquid cooling plate group, which comprises a first end liquid cooling plate, at least one middle liquid cooling plate and a second end liquid cooling plate arranged in sequence along the Z-axis direction, the first end liquid cooling plate, the middle liquid cooling plate and the second end liquid cooling plate are communicated through a liquid cooling flow channel, and the liquid cooling flow channel is located in the assembly groove.

[0015] By adopting the above scheme, the built-in liquid cooling flow channel not only improves the cooling efficiency, but also ensures the compactness and safety of the liquid cooling system, avoiding the disadvantages of exposed liquid cooling pipes in traditional design.

[0016] Further, the battery frame and the liquid cooling plate group are sealingly connected, and the battery cell group and the liquid cooling plate group are provided with a heat conducting member.

[0017] By adopting the above scheme, the heat-conducting member serves as a heat transfer medium between the battery cell and the liquid cooling plate, which can significantly improve the heat conduction efficiency, help quickly transfer the heat generated by the battery cell to the liquid cooling plate, and then take away by the cooling liquid, thereby realizing effective cooling of the battery; ensure that the temperature distribution between the battery cells is more uniform, avoid local overheating or too low temperature, reduce the risk of battery thermal runaway, and enhance the safety of the battery.

[0018] Further, the heat-conducting member is one or more of a heat-conducting structural adhesive, a heat-conducting gel, and a heat-conducting silicone gel pad.

[0019] By adopting the above scheme, all have excellent heat conduction performance, which can be selected according to different needs. The heat-conducting structural adhesive is suitable for occasions requiring high-strength bonding and heat dissipation; the heat-conducting gel is suitable for filling uneven interfaces due to its softness and compressibility; and the heat-conducting silicone gel pad is suitable for occasions requiring sealing and buffering due to its good elasticity and sealing property.

[0020] Further, the battery frame is provided with a first sealing groove on the side facing the first or second end liquid cooling plate, a first sealing member is arranged in the first sealing groove, and a first locking site is arranged on the outside of the first sealing groove. A first locking member is arranged between the first locking site and the first or second end liquid cooling plate.

[0021] By adopting the above scheme, the sealing property between the battery frame and the liquid cooling plate is ensured, which helps to prevent external dust, moisture and other impurities from entering the inside of the battery pack, maintains the cleanliness and stability of the inside environment of the battery pack, and the design of the first locking site and the first locking member makes the connection between the battery frame and the liquid cooling plate more convenient. This helps to simplify the assembly process of the battery pack and improve the production efficiency.

[0022] Further, the battery frame is provided with a second sealing groove on the side facing the end cover, a second sealing member is arranged in the second sealing groove, and a second locking site is arranged on the outside of the second sealing groove. A second locking member is arranged between the second locking site and the end cover.

[0023] By adopting the above scheme, the connection strength between the battery frame and the end cover is enhanced, the second locking member ensures the assembly precision between the battery frame and the end cover, avoids the performance degradation or safety hazards caused by assembly errors, and improves the overall performance of the battery pack.

[0024] Further, the battery frame is provided with an abutting rib on the inside, and the abutting rib is sealingly connected with the middle liquid cooling plate.

[0025] By adopting the above scheme, it is helpful to fix and limit the middle liquid cooling plate, and ensure the stable assembly and stable heat exchange of the middle liquid cooling plate.

[0026] In summary, the battery pack has the following technical effects:

[0027] 1. By setting the recessed assembly groove at one end of each battery module, and extending the electrode into the assembly groove to realize electrical connection through integrated wire row, this design greatly simplifies the connection complexity between battery modules, while avoiding the complex external wiring in traditional design, thereby reducing the occupation of external space of the battery pack;

[0028] 2. The integrated quick socket on the end cover provides a convenient external connection point for the wire row, so that the battery management system can be quickly connected through the quick wire, improving the maintainability and flexibility of the system. When the battery management system needs to be repaired or replaced, only the quick wire needs to be disconnected, without the need to disassemble the entire battery pack. The split setting of the battery pack and the battery management system not only significantly reduces the overall volume of the battery pack and improves the space utilization, but also enables the battery management system to be installed in a more flexible position, further optimizing the system layout and meeting the needs of different application scenarios;

[0029] 3. The end cover covers all the assembly grooves of the battery modules, not only playing a protective role, but also enhancing the structural integrity of the battery pack. This design enables the battery pack to better maintain its structural stability when subjected to external impact or vibration. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of the embodiment of the utility model;

[0031] Figure 2 is a schematic diagram of the battery frame structure of the embodiment of the utility model;

[0032] Figure 3 is a schematic diagram of the internal structure of the battery module of the embodiment of the utility model;

[0033] Figure 4 is a schematic diagram of the side structure of the embodiment of the utility model;

[0034] Figure 5 is Figure 4 a sectional view of A-A in the middle;

[0035] Figure 6 is Figure 5 an enlarged view of B area in the middle;

[0036] Figure 7 is Figure 5 an enlarged view of C area in the middle.

[0037] Wherein, the reference mark meaning is as follows: 1, battery module; 11, battery frame; 111, assembly groove; 112, electric core cavity; 113, second sealing groove; 114, second sealing piece; 115, second locking site; 116, second locking piece; 117, abutment edge; 12, electrode; 13, wire row; 14, electric core group; 141, electric core; 142, baffle; 15, spacing plate; 151, reinforcing rib; 152, retaining rib; 2, liquid cooling plate group; 21, first end liquid cooling plate; 211, first sealing groove; 212, first sealing piece; 213, first locking site; 214, first locking piece; 22, intermediate liquid cooling plate; 23, second end liquid cooling plate; 24, liquid cooling flow channel; 3, end cover; 31, quick connector socket; 4, battery management system; 41, quick connection wire; 5, heat conduction piece; 6, third oil guiding structure. DETAILED DESCRIPTION

[0038] In order to better understand and implement, the following will be combined with the drawings of the utility model, the technical scheme in the embodiment of the utility model is described and discussed clearly and completely, obviously, only a part of the utility model described here, not all examples, based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts, belong to the protection scope of the utility model.

[0039] In order to facilitate the understanding of the embodiment of the utility model, the following will be combined with the drawings to make further explanation and description with specific examples, and each embodiment does not constitute the limitation of the embodiment of the utility model.

[0040] In the description of the utility model, it is necessary to explain that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing the specific embodiments, and are not intended to limit the utility model.

[0042] The embodiment of the utility model refers to Figures 1-7As shown, a battery pack is disclosed, the length direction of the battery pack is set as X axis, the width direction is set as Y axis, and the height direction is set as Z axis. The battery pack comprises at least two battery modules 1 stacked along the Z axis direction, an end cover 3, and a battery management system 4. Each battery module 1 is provided with an inwardly recessed assembly groove 111 at one end of the X axis. The assembly grooves 111 of each battery module 1 are interconnected. The electrodes 12 of each battery module 1 extend into the respective assembly groove 111. A wire row 13 for electrical connection is integrally arranged between each electrode 12. The end cover 3 is assembled at one end of all the battery modules 1 in the X axis to cover all the assembly grooves 111. The end cover 3 is provided with a quick connector socket 31 for connecting the wire row 13. The quick connector line 41 is inserted between the quick connector socket 31 and the battery management system 4. The assembly groove 111 provides space for the integration of the electrode 12 and the liquid cooling pipe. The electrode 12 extends into the respective assembly groove 111 and realizes electrical connection through the integrated wire row 13, greatly simplifying the connection complexity between the battery modules 1 and reducing the occupation of external space. The end cover 3 covers the assembly grooves 111 of all the battery modules 1, effectively playing a protective role. The integrated quick connector socket 31 on the end cover 3 provides a convenient external connection point for the wire row 13, not only enhancing the structural integrity of the battery pack, but also facilitating the quick connection of the battery management system 4, improving the maintainability and flexibility of the system.

[0043] In some embodiments, the battery pack further comprises a liquid cooling plate group 2. The liquid cooling plate group 2 comprises a first end liquid cooling plate 21, at least one middle liquid cooling plate 22, and a second end liquid cooling plate 23 arranged in sequence along the Z axis direction. The first end liquid cooling plate 21, the middle liquid cooling plate 22, and the second end liquid cooling plate 23 are connected through a liquid cooling flow channel 24. The liquid cooling flow channel 24 is located in the assembly groove 111. The built-in liquid cooling flow channel 24 not only improves the cooling efficiency, but also ensures the compactness and safety of the liquid cooling system, avoiding the disadvantages of exposed liquid cooling pipes in traditional designs.

[0044] Preferably, in the present embodiment 1, the battery module 1 is provided with three battery pack assemblies, and each battery pack assembly includes a battery frame 11 and a plurality of cell groups 14. Preferably, the cell group 14 is provided with three cell groups 14, and the three cell groups 14 are arranged along the Y-axis direction, and each cell group 14 is stacked by a plurality of cell groups 141 along the X-axis direction. The battery frame 11 is open at both ends in the Z-axis direction, and is used to assemble with the liquid cooling plate group 2. Preferably, the battery frame 11 is sealingly connected with the liquid cooling plate group 2. Optionally, when the battery frame 11 is located at the top end of the Z-axis, the top surface of the battery frame 11 is assembled with the first end liquid cooling plate 21, and the bottom surface of the battery frame 11 is assembled with the middle liquid cooling plate 22. When the battery frame 11 is located at the bottom end of the Z-axis, the top surface of the battery frame 11 is assembled with the middle liquid cooling plate 22, and the bottom surface of the battery frame 11 is assembled with the second end liquid cooling plate 23. When the battery frame 11 is located between the top end and the bottom end, the top surface and the bottom surface of the battery frame 11 are respectively assembled with a middle liquid cooling plate 22. It should be noted that the assembly between the battery frame 11 and the liquid cooling plate group 2 includes but is not limited to welding, clamping or screwing. In the present embodiment 1, the assembly between the battery frame 11 and the liquid cooling plate group 2 adopts friction stir welding seam connection.

[0045] In some embodiments, in order to improve the welding stability between the battery frame 11 and the middle liquid cooling plate 22, the battery frame 11 is provided with an abutting rib 117 on the inner side, and the abutting rib 117 is sealingly welded with the middle liquid cooling plate 22, which helps to fix and limit the middle liquid cooling plate 22, and ensures the stable assembly and stable heat exchange of the middle liquid cooling plate 22. Preferably, the battery frame 11 and the middle liquid cooling plate 22 are preferably connected by friction stir welding seam.

[0046] In the present embodiment 1, the assembly groove 111 is arranged on the battery frame 11, and the battery frame 11 is further provided with a cell cavity 112 arranged at intervals with the assembly groove 111 along the X-axis direction. The cell group 14 is arranged in the cell cavity 112, so that the space in the battery frame 11 is maximally utilized. This not only improves the energy density of the battery pack, but also reduces the overall size and weight of the battery pack. The liquid cooling plate group 2 can be easily inserted into the inside of the battery frame 11 to exchange heat with the cell 141, reduce the temperature of the battery pack, and prolong the service life of the cell 141.

[0047] In some embodiments, optionally, a spacing plate 15 is arranged between the cell cavity 112 and the assembly groove 111, and the spacing plate 15 is provided with transverse and longitudinal staggered reinforcing ribs 151, which can significantly improve the mechanical strength of the spacing plate 15, prevent the spacing plate 15 from deforming or breaking, and thus maintain the stability and integrity of the structure of the battery module 1.

[0048] In some embodiments, the space between the cell cavity 112 and the assembly groove 111 is optionally provided with a spacer plate 15, which is provided with protruding retaining ribs 152 that abut or fit with the end cover 3. The design of the retaining ribs 152 enhances the connection strength between the spacer plate 15 and the end cover 3, so that the battery module 1 can remain stable when subjected to external impact or vibration. This structural stability helps to prevent relative movement or misalignment between the cells 141, thereby reducing the risk of internal short circuit of the battery module 1.

[0049] In some embodiments, the space between the cell group 14 and the liquid cooling plate group 2 is provided with a heat-conducting member 5, which serves as a heat transfer medium between the cells 141 and the liquid cooling plate. This can significantly improve the heat conduction efficiency, helping to quickly transfer the heat generated by the cells 141 to the liquid cooling plate, which is then carried away by the cooling liquid, thereby achieving effective cooling of the battery. This ensures more uniform temperature distribution between the cells 141, avoiding local overheating or excessively low temperature, reducing the risk of battery thermal runaway and enhancing the safety of the battery. Optionally, the heat-conducting member 5 is one or more of heat-conducting structural adhesive, heat-conducting gel, and heat-conducting silicone gel pad, which can be selected according to different needs. The heat-conducting structural adhesive is suitable for applications requiring high-strength bonding and heat dissipation. The heat-conducting gel is suitable for filling uneven interfaces due to its softness and compressibility. The heat-conducting silicone gel pad is suitable for applications requiring sealing and cushioning due to its good elasticity and sealing properties. Specifically, in this embodiment 1, the cell group 14 is provided with a CCS (Cell Connection System) above it, which is provided with a bar plate 142. The bar plate 142 is sealed and heat-conducted with the liquid cooling plate group 2 through heat-conducting gel or heat-conducting silicone gel pad. The bottom surface of the cell group 14 is sealed and heat-conducted with the liquid cooling plate group 2 through heat-conducting structural adhesive.

[0050] In some embodiments, in order to improve the sealing between the battery frame 11 and the first end liquid cooling plate 21 or the second end liquid cooling plate 23, a first sealing groove 211 is arranged on the side of the battery frame 11 facing the first end liquid cooling plate 21 or the second end liquid cooling plate 23, a first sealing member 212 is arranged in the first sealing groove 211, preferably the first sealing member 212 is sealing glue, a first locking site 213 is arranged on the outside of the first sealing groove 211, preferably the first locking site 213 is a threaded hole, a first locking member 214 is arranged between the first locking site 213 and the first end liquid cooling plate 21 or the second end liquid cooling plate 23, preferably the first locking member 214 is a screw. By the arrangement, the sealing between the battery frame 11 and the liquid cooling plate is ensured, which helps to prevent external dust, moisture and other impurities from entering the inside of the battery pack, maintains the cleanliness and stability of the inside environment of the battery pack, and the design of the first locking site 213 and the first locking member 214 makes the connection between the battery frame 11 and the liquid cooling plate more convenient. This helps to simplify the assembly process of the battery pack and improve the production efficiency.

[0051] In some embodiments, in order to improve the sealing between the battery frame 11 and the end cover 3, a second sealing groove 113 is arranged on the side of the battery frame 11 facing the end cover 3, a second sealing member 114 is arranged in the second sealing groove 113, preferably the second sealing member 114 is sealing glue, a second locking site 115 is arranged on the outside of the second sealing groove 113, preferably the second locking site 115 is a threaded hole, and a second locking member 116 is arranged between the second locking site 115 and the end cover 3. Preferably, the second locking member 116 is a screw. By the arrangement, the connection strength between the battery frame 11 and the end cover 3 can be enhanced, the assembly precision between the battery frame 11 and the end cover 3 is ensured by the second locking member, the performance decline or safety hazard caused by assembly error is avoided, and the overall performance of the battery pack is improved.

[0052] In the embodiment 1, the battery frame 11 and / or the end cover 3 can also be provided with an explosion-proof valve to achieve the pressure relief effect.

[0053] In summary, the battery pack provided by the utility model has the following technical effects:

[0054] 1. By arranging the recessed assembly groove 111 on one end of each battery module 1, and extending the electrode 12 into the assembly groove 111 to realize electrical connection through the integrated wire harness 13, the connection complexity between the battery modules 1 is greatly simplified, and the complex external wiring in the traditional design is avoided, thereby reducing the occupation of the external space of the battery pack.

[0055] 2. The liquid cooling plate group 2 is closely integrated with the battery module 1, and the liquid cooling flow channel 24 is located in the assembly groove 111, so that the whole battery pack structure is more compact, which is conducive to realizing efficient layout in limited space. The liquid cooling flow channel 24 is built-in and covered by the end cover 3, avoiding the safety hazards such as collision and leakage that may be caused by the exposure of the liquid cooling pipeline in the traditional design. At the same time, the compact structure also reduces the interference and damage of external factors to the battery pack;

[0056] 3. The quick connector socket 31 integrated on the end cover 3 provides a convenient external connection point for the wire row 13, so that the battery management system 4 can be quickly connected through the quick connection wire 41, improving the maintainability and flexibility of the system. When the battery management system 4 needs to be repaired or replaced, it only needs to disconnect the quick connection wire 41, without the need to disassemble the whole battery pack. The split setting of the battery pack and the battery management system 4 not only significantly reduces the overall volume of the battery pack and improves the space utilization, but also enables the battery management system 4 to be installed in a more flexible position, further optimizing the system layout and meeting the needs of different application scenarios;

[0057] 4. The end cover 3 covers all the assembly grooves 111 of the battery module 1, not only playing a protective role, but also enhancing the structural integrity of the battery pack. This design enables the battery pack to better maintain its structural stability when subjected to external impact or vibration.

[0058] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above-mentioned embodiments, but also includes technical solutions composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the technical field, without departing from the principles of the utility model, a number of improvements and refinements can be made, which are also considered within the protection scope of the utility model.

Claims

1. A battery pack, characterized by, The utility model relates to a battery module and a liquid cooling plate group, and belongs to the technical field of battery module. It comprises: At least two battery modules (1) stacked along the Z-axis direction, each of the battery modules (1) is provided with a concave assembly groove (111) at one end of the X-axis, the assembly grooves (111) of each of the battery modules (1) are interconnected, and the electrodes (12) of each of the battery modules (1) extend into the respective assembly grooves (111), and a wire row (13) for electrical connection is integrally arranged between each of the electrodes (12); An end cover (3) is assembled at one end of all the battery modules (1) along the X-axis to cover all the assembly grooves (111), and the end cover (3) is provided with a quick connector socket (31) for connecting the wire row (13); 2. The battery pack of claim 1, wherein, A battery management system (4) is connected to the quick connector socket (31) through a quick connector wire (41). The battery module (1) comprises: A battery frame (11) which is open at both ends along the Z-axis direction and is used for assembly with a liquid cooling plate group (2), the assembly groove (111) is arranged on the battery frame (11), and the battery frame (11) is further provided with a cell cavity (112) arranged at intervals with the assembly groove (111) along the X-axis direction; 3. The battery pack of claim 2, wherein, A plurality of cell groups (14) are arranged along the Y-axis direction in the cell cavity (112), and each of the cell groups (14) is stacked along the X-axis direction by a plurality of cells (141).

4. The battery pack of claim 2, wherein, The cell cavity (112) and the assembly groove (111) are provided with a spacing plate (15), and the spacing plate (15) is provided with transverse and longitudinal staggered reinforcing ribs (151).

5. The battery pack of claim 2, wherein, The cell cavity (112) and the assembly groove (111) are provided with a spacing plate (15), and the spacing plate (15) is provided with a protruding retaining rib (152), and the retaining rib (152) abuts or is assembled with the end cover (3).

6. The battery pack of claim 5, wherein, Further comprising a liquid cooling plate group (2), the liquid cooling plate group (2) comprises a first end liquid cooling plate (21), at least one intermediate liquid cooling plate (22) and a second end liquid cooling plate (23) arranged in sequence along the Z-axis direction, the first end liquid cooling plate (21), the intermediate liquid cooling plate (22) and the second end liquid cooling plate (23) are communicated through a liquid cooling flow channel (24), and the liquid cooling flow channel (24) is located in the assembly groove (111).

7. The battery pack of claim 6, wherein, The battery frame (11) and the liquid cooling plate group (2) are sealingly connected, and the cell group (14) and the liquid cooling plate group (2) are provided with a heat conducting member (5). The heat conducting member (5) is one or more of heat conducting structural glue, heat conducting gel and heat conducting silicone gel pad.

8. The battery pack of claim 5, wherein, The battery frame (11) is provided with a first sealing groove (211) on one side of the first end liquid cooling plate (21) or the second end liquid cooling plate (23), a first sealing piece (212) is arranged in the first sealing groove (211), a first locking position (213) is arranged on the outer side of the first sealing groove (211), and a first locking piece (214) is arranged between the first locking position (213) and the first end liquid cooling plate (21) or the second end liquid cooling plate (23).

9. The battery pack of claim 2, wherein, The battery frame (11) is provided with a second sealing groove (113) on one side of the end cover (3), a second sealing piece (114) is arranged in the second sealing groove (113), a second locking position (115) is arranged on the outer side of the second sealing groove (113), and a second locking piece (116) is arranged between the second locking position (115) and the end cover (3).

10. The battery pack of claim 5, wherein, The battery frame (11) is provided with an abutting edge (117) on the inner side, and the abutting edge (117) is sealingly connected with the middle liquid cooling plate (22).

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