Battery pack

Abstract

The utility model discloses a battery pack which comprises a battery box body, a first opening is formed in one side of the battery box body, and a second opening is formed in the side, opposite to the first opening, of the battery box body; the battery module is assembled in the battery box body; the first liquid cooling plate is assembled at the first opening of the battery box body; the second liquid cooling plate is assembled at the second opening of the battery box body; the CCS assembly is arranged between the battery module and the first liquid cooling plate, and the first opening and the second opening are formed in the two sides of the battery box body and can be used for assembling the first liquid cooling plate and the second liquid cooling plate, so that the battery module is fully covered, the problem of uneven heat distribution is favorably solved, the heat dissipation effect is improved, and the service life of the battery box body is prolonged. Meanwhile, the design of a cover body outside the liquid cooling plate is omitted, so that the thermal resistance is reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] With the rapid development of electric vehicles and energy storage technologies, the charging and discharging power of battery packs has been continuously increasing to meet the growing energy demand. However, a significant problem brought about by high-power charging and discharging is that the heat generated inside the battery pack cannot be effectively released, resulting in a significant increase in the temperature of the battery cells. This not only affects the performance of the battery pack but also severely shortens its service life. Therefore, how to effectively release the heat generated by the battery pack has become a technical problem that urgently needs to be solved.

[0003] Existing battery pack heat dissipation solutions usually involve setting a liquid cooling plate on the top or bottom of the battery pack, and the heat generated by the battery is carried away by the flow of coolant inside the liquid cooling plate. However, this design has several significant problems: First, the liquid cooling plate is usually only set on the top or bottom of the battery pack and cannot cover the battery pack more comprehensively, resulting in uneven heat distribution and poor heat dissipation effect; Second, although the cover body set outside the liquid cooling plate improves the support strength and protection of the battery pack, it also increases the thermal resistance and reduces the heat transfer efficiency, unable to meet the heat dissipation requirements. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a battery pack, which can solve the problem of poor heat dissipation effect.

[0005] The technical solution adopted by the utility model to solve its problems is as follows:

[0006] A battery pack, comprising: a battery box body, on one side of which there is a first opening, and on the side of the battery box body opposite to the first opening there is a second opening; a battery module assembled inside the battery box body; a first liquid cooling plate assembled at the first opening of the battery box body; a second liquid cooling plate assembled at the second opening of the battery box body; and a CCS component arranged between the battery module and the first liquid cooling plate.

[0007] By adopting the above solution, by providing a first opening and a second opening on both sides of the battery box body, it can be used to assemble the first liquid cooling plate and the second liquid cooling plate, achieving comprehensive coverage of the battery module, helping to improve the problem of uneven heat distribution, enhancing the heat dissipation effect, and at the same time canceling the cover body design outside the liquid cooling plate, reducing the thermal resistance, thereby improving the heat transfer efficiency.

[0008] Further, the first liquid cooling plate includes: a first flow channel plate; a first flat plate, the first flat plate is buckled to the first flow channel plate, and a first liquid cooling flow channel is formed between the first flow channel plate and the first flat plate. The first liquid cooling flow channel is provided with a first liquid cooling inlet and a first liquid cooling outlet.

[0009] By adopting the above solution, the first liquid cooling plate is located at the first opening of the battery module and the battery box body, and it can be directly in contact with the battery module, so as to more efficiently take away the heat generated by the battery; and the coolant enters from the first liquid cooling inlet, flows through the first liquid cooling flow channel, absorbs the heat of the battery module, and then flows out from the first liquid cooling outlet, forming a complete heat dissipation cycle.

[0010] Further, an installation platform recessed into the first liquid cooling flow channel is provided on the first flow channel plate, and an installation hole corresponding to the installation platform is provided on the first flat plate, and the installation platform is assembled into the installation hole.

[0011] By adopting the above solution, it is convenient for the installation and positioning of the first flat plate, and at the same time, the connection strength between the first flow channel plate and the first flat plate is enhanced; the installation platform will be assembled into this installation hole, so that the first flow channel plate and the first flat plate can be tightly buckled together, which can ensure the sealing performance of the first liquid cooling flow channel and prevent the coolant from leaking.

[0012] Further, reinforcing ribs recessed into the first liquid cooling flow channel are provided on the first flat plate; and / or, reinforcing ribs protruding away from the first liquid cooling flow channel are provided on the first flat plate.

[0013] By adopting the above solution, if the reinforcing ribs are recessed into the first liquid cooling flow channel, this design can improve the stiffness of its local area without increasing the overall thickness of the first flat plate. The recessed reinforcing ribs can effectively resist the pressure fluctuation generated by the coolant flow, thereby ensuring the stability and sealing performance of the first liquid cooling flow channel. In addition, this design helps to reduce the turbulence of the coolant in the flow channel and improve the heat dissipation efficiency; if the reinforcing ribs protrude away from the first liquid cooling flow channel, this design can enhance the overall strength and stiffness of the first flat plate. The protruding reinforcing ribs can increase the surface area of the first flat plate, making it more resistant to external pressure and impact. This design is of great significance for improving the durability and safety of the battery pack in a harsh working environment.

[0014] Further, the second liquid cooling plate includes: a second flow channel plate; a second flat plate, the second flat plate is buckled to the second flow channel plate, and a second liquid cooling flow channel formed between the second flow channel plate and the second flat plate. The second liquid cooling flow channel is provided with a second liquid cooling inlet and a second liquid cooling outlet.

[0015] By adopting the above solution, the fastening design between the flow channel plate and the bottom plate ensures the sealing of the flow channel, preventing the risk of coolant leakage. Moreover, the coolant enters from the second liquid cooling inlet, flows through the second liquid cooling flow channel, absorbs the heat of the battery module, and then flows out from the second liquid cooling outlet, forming a complete heat dissipation cycle.

[0016] Further, a flow dividing rib is arranged in the second liquid cooling flow channel along the length direction of the second flow channel plate.

[0017] By adopting the above solution, the coolant can be more evenly distributed in the flow channel, reducing the flow dead zone and improving the heat dissipation performance.

[0018] Further, a flow disturbing rib is arranged in the second liquid cooling flow channel facing the flow dividing rib; and / or, flow disturbing bumps are arranged on the flow dividing rib.

[0019] By adopting the above solution, the flow state of the coolant in the flow channel can be improved, the turbulent flow effect can be increased, and the heat dissipation performance can be improved.

[0020] Further, a first heat conduction structure is arranged between the first liquid cooling plate and the CCS component; and / or, a second heat conduction structure is arranged between the second liquid cooling plate and the battery module.

[0021] By adopting the above solution, the heat conduction path is optimized and the thermal resistance is reduced through the first heat conduction structure and / or the second heat conduction structure, ensuring that the heat generated by the battery module can be quickly and effectively transferred to the liquid cooling plate and then taken away by the coolant. This not only helps to keep the battery module operating within a suitable temperature range, improving the performance and lifespan of the battery, but also ensures the safe and stable operation of the battery pack.

[0022] Further, the CCS component includes: a plastic bracket provided with a plurality of assembly grooves; connection pieces, with at least one connection piece assembled in each assembly groove; a collection wire harness connected to each connection piece; wherein, the thickness of the connection piece is not higher than the depth of the assembly groove.

[0023] By adopting the above solution, reliable connection and signal transmission between battery modules are achieved.

[0024] Further, the first heat conduction structure includes a plurality of heat conduction pads arranged corresponding to the assembly grooves. One side of the heat conduction pad contacts the connection piece in the assembly groove, and the other side contacts the first liquid cooling plate.

[0025] By adopting the above solution, it is ensured that the heat generated by each connection piece can be effectively transferred to the first liquid cooling plate through the heat conduction pad.

[0026] Furthermore, a concave supporting groove is provided on the side of the second liquid cooling plate facing the battery module, and the battery module is assembled in the supporting groove.

[0027] By adopting the above scheme, this kind of contact not only ensures the stability of the battery module, but also improves the efficiency of heat conduction.

[0028] Furthermore, the second heat conduction structure includes a plurality of heat conduction strips, which are arranged at intervals along the length direction of the second liquid cooling plate.

[0029] By adopting the above scheme, it ensures the uniform distribution and effective transfer of heat on the battery module, the efficient heat conduction from the battery module to the second liquid cooling plate, and improves the heat dissipation effect.

[0030] Furthermore, the thickness of the heat conduction strip is less than the depth of the supporting groove.

[0031] By adopting the above scheme, it ensures that the heat conduction strip can be completely embedded in the supporting groove, closely fit with the battery module and the second liquid cooling plate, reduces the thermal resistance, and improves the heat conduction efficiency; it allows a certain installation and adjustment space to adapt to battery modules of different sizes and shapes.

[0032] Furthermore, a maintenance window is provided on the battery module.

[0033] By adopting the above scheme, it is convenient for the disassembly and maintenance of the battery pack.

[0034] In summary, a battery pack provided by the present utility model has the following technical effects:

[0035] 1. By respectively providing a first opening and a second opening on both sides of the battery box body and assembling a first liquid cooling plate and a second liquid cooling plate, comprehensive coverage of the battery module is achieved. This design ensures that the heat generated by the battery module can be evenly and effectively absorbed and carried away by the liquid cooling plate, thus avoiding the problem of uneven heat distribution and improving the overall heat dissipation effect;

[0036] 2. The design of the cover outside the liquid cooling plate is cancelled, and the liquid cooling plate is directly in contact with the external environment, reducing the thermal resistance, enabling the heat to be transferred to the coolant more quickly, and improving the heat exchange efficiency. This design can ensure that the heat generated during high-power charging and discharging of the battery module can be taken away in time, keeping the battery module within a suitable working temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0038] Figure 2 is a partial exploded structural schematic diagram of an embodiment of the present utility model;

[0039] Figure 3 Schematic diagram of the disassembly structure of the first liquid cooling plate according to an embodiment of the present utility model;

[0040] Figure 4 Schematic diagram of the sectional structure of the first liquid cooling plate according to an embodiment of the present utility model;

[0041] Figure 5 Schematic diagram of the disassembly structure of the first liquid cooling plate according to an embodiment of the present utility model;

[0042] Figure 6 Schematic diagram of the sectional structure of the first liquid cooling plate according to an embodiment of the present utility model;

[0043] Figure 7 Schematic diagram of the CCS component structure according to an embodiment of the present utility model;

[0044] Figure 8 Schematic diagram of the side structure of the battery box according to an embodiment of the present utility model.

[0045] Among them, the meanings of the reference numerals are as follows: 1, battery box; 11, first opening; 12, second opening; 2, battery module; 3, first liquid cooling plate; 31, first flow channel plate; 311, mounting table; 32, first flat plate; 321, mounting hole; 33, first liquid cooling flow channel; 331, first inflow channel; 332, first converging channel; 333, first outflow channel; 34, reinforcing rib; 35, first liquid cooling inlet; 36, first liquid cooling outlet; 4, second liquid cooling plate; 41, second flow channel plate; 411, supporting groove; 42, second flat plate; 43, second liquid cooling flow channel; 44, shunt rib; 45, turbulence rib; 46, turbulence bump; 47, second liquid cooling inlet; 48, second liquid cooling outlet; 5, CCS component; 51, plastic bracket; 511, assembly groove; 52, connecting piece; 53, acquisition wire harness; 6, first heat conduction structure; 61, heat conduction pad; 7, second heat conduction structure; 71, heat conduction strip; 8, electrical component; 81, fire sprinkler; 82, communication interface; 83, explosion-proof valve; 84, positive high-voltage connection socket; 85, negative high-voltage connection socket; 86, battery management unit; 87, fuse; 9, maintenance window. Detailed implementation manners

[0046] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described and discussed below in conjunction with the drawings of the present utility model. Obviously, what is described here is only a part of the examples of the present utility model, not all of the examples. All other examples obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0047] For the convenience of understanding the embodiments of the present utility model, the following will further explain with specific embodiments in conjunction with the drawings, and each embodiment does not constitute a limitation to the embodiments of the present utility model.

[0048] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0050] Embodiment 1 of the present utility model is referred to Figures 1-8 As shown, a battery pack is disclosed, which includes a battery box body 1, a battery module 2, a first liquid cooling plate 3, a second liquid cooling plate 4, and a CCS component 5. A first opening 11 is provided on one side of the battery box body 1, and a second opening 12 is provided on the side of the battery box body 1 opposite to the first opening 11. In actual use of this Embodiment 1, the first opening 11 is located at the top of the battery pack, and the second opening 12 is located at the bottom of the battery pack. The battery module 2 is assembled in the battery box body 1, and the fixing method includes but is not limited to being fixed with foaming glue. Preferably, the battery module 2 is stacked by a plurality of battery cells and is wound with a steel strip. The first liquid cooling plate 3 is assembled at the first opening 11 of the battery box body 1, and the second liquid cooling plate 4 is assembled at the second opening 12 of the battery box body 1. The CCS component 5 is arranged between the battery module 2 and the first liquid cooling plate 3. The CCS component 5 includes a plastic bracket 51, a connecting piece 52, and a collecting wire harness 53. The plastic bracket 51 is provided with a plurality of assembly grooves 511, and at least one of the connecting pieces 52 is assembled in each of the assembly grooves 511. The collecting wire harness 53 is connected to each of the connecting pieces 52; wherein, the thickness of the connecting piece 52 is not higher than the depth of the assembly groove 511, realizing reliable connection and signal transmission between battery modules. By providing the first opening 11 and the second opening 12 on both sides of the battery box body 1, it can be used to assemble the first liquid cooling plate 3 and the second liquid cooling plate 4, realizing comprehensive coverage of the battery module 2, helping to improve the problem of uneven heat distribution, improving the heat dissipation effect, and at the same time canceling the cover design outside the liquid cooling plate, reducing the thermal resistance, thereby improving the heat exchange efficiency.

[0051] Specifically, referring to Figures 2-5 As shown, the first liquid cooling plate 3 located at the top of the battery module 2 includes a first flow channel plate 31 and a first flat plate 32. The first flat plate 32 is buckled onto the first flow channel plate 31. The first flow channel plate 31 is closer to the battery module 2 than the first flat plate 32. A first liquid cooling flow channel 33 is formed between the first flow channel plate 31 and the first flat plate 32. The first liquid cooling flow channel 33 is provided with a first liquid cooling inlet 35 and a first liquid cooling outlet 36. An installation platform 311 recessed into the first liquid cooling flow channel 33 is provided on the first flow channel plate 31. An installation hole 321 corresponding to the installation platform 311 is provided on the first flat plate 32. The installation platform 311 is assembled in the installation hole 321. The first liquid cooling flow channel 33 is arranged to avoid the installation hole 321 and the installation platform 311. Preferably, the first liquid cooling flow channel 33 is preferably U-shaped or S-shaped. In this Embodiment 1, the first liquid cooling flow channel 33 is U-shaped and includes a first inflow channel 331, a first converging channel 332, and a first outflow channel 333. The first liquid cooling inlet 35 is communicated with the first inflow channel 331. The first outflow channel 333 is communicated with the first liquid cooling outlet 36. Both the first inflow channel 331 and the first outflow channel 333 are provided with multiple ones and are separated by the installation platform 311. Preferably, two first inflow channels 331 are provided and three first outflow channels 333 are provided. Multiple first inflow channels 331 and multiple first outflow channels 333 are all communicated through the first converging channel 332. The coolant enters from the first liquid cooling inlet 35, flows through the first liquid cooling flow channel 33, absorbs the heat of the battery module 2, and then flows out from the first liquid cooling outlet 36, forming a complete heat dissipation cycle.

[0052] The second liquid cooling plate 4 located at the bottom of the battery module 2 includes a second flow channel plate 41 and a second flat plate 42. The second flat plate 42 is buckled onto the second flow channel plate 41. The second flow channel plate 41 is closer to the battery module 2 than the second flat plate 42. A second liquid cooling flow channel 43 is formed between the second flow channel plate 41 and the second flat plate 42. The second liquid cooling flow channel 43 is provided with a second liquid cooling inlet 47 and a second liquid cooling outlet 48. Preferably, the second liquid cooling flow channel 43 is preferably U-shaped or S-shaped. In this Embodiment 1, the second liquid cooling flow channel 43 is S-shaped. More preferably, in order to make the coolant flow more uniformly in the second liquid cooling flow channel 43, a flow dividing rib 44 is arranged in the second liquid cooling flow channel 43 along the length direction of the second flow channel plate 41. The flow dividing rib 44 is integrally arranged on the second flow channel plate 41 or the second flat plate 42 and abuts against the other one, which can make the coolant more evenly distributed in the flow channel, reduce the flow dead zone, and improve the heat dissipation performance. Thus, the second liquid cooling flow channel 43 along the length direction of the second flow channel plate 41 is divided into multiple, preferably 3, channels. The coolant enters from the second liquid cooling inlet 47, flows through the second liquid cooling flow channel 43, absorbs the heat of the battery module 2, and then flows out from the second liquid cooling outlet 48, forming a complete heat dissipation cycle.

[0053] It should be noted that in other embodiments, the positions of the first liquid cooling plate 3 and the second liquid cooling plate 4 in the battery box 1 can be interchanged as long as the heat dissipation of the top and bottom of the battery module 2 can be achieved.

[0054] In some embodiments, refer to Figure 3As shown, the first liquid cooling plate 3 is disposed on the top of the battery box 1. To improve the load-bearing capacity of the top of the battery box 1, reinforcing ribs 34 that are recessed toward the first liquid cooling channel 33 are provided on the first flat plate 32; and / or, reinforcing ribs 34 that protrude away from the first liquid cooling channel 33 are provided on the first flat plate 32. In Embodiment 1, only the reinforcing ribs 34 that are recessed toward the first liquid cooling channel 33 are provided on the first flat plate 32. This design can improve the stiffness of its local area without increasing the overall thickness of the first flat plate 32. The recessed reinforcing ribs 34 can effectively resist the pressure fluctuations generated by the coolant flow, thereby ensuring the stability and sealing performance of the first liquid cooling channel 33. In addition, this design helps to reduce the turbulence of the coolant in the channel and improve the heat dissipation efficiency. In other embodiments, if the reinforcing ribs 34 protrude away from the first liquid cooling channel 33, this design can enhance the overall strength and stiffness of the first flat plate 32. The protruding reinforcing ribs 34 can increase the surface area of the first flat plate 32, making it more resistant to external pressure and impact. This design is of great significance for improving the durability and safety of the battery pack in harsh working environments. Of course, in some embodiments, the reinforcing ribs 34 can also exist in both states, and this embodiment does not make specific limitations.

[0055] In some embodiments, referring to Figures 5-6 As shown, the second liquid cooling plate 4 is disposed at the bottom of the battery box 1. To improve the heat dissipation effect at the bottom of the battery box 1, turbulator ribs 45 that are directed toward the flow dividing ribs 44 are provided in the second liquid cooling channel 43; and / or, turbulator bumps 46 are provided on the flow dividing ribs 44. In Embodiment 1, both the turbulator ribs 45 and the turbulator bumps 46 exist, which can improve the flow state of the coolant in the channel, increase the turbulence effect, and improve the heat dissipation performance. In other embodiments, turbulator bumps 46 and turbulator ribs 45 can also be provided in the first liquid cooling plate 3, as long as the turbulator effect can be achieved.

[0056] It should be noted that the shapes of the turbulator ribs 45 and the turbulator bumps 46 are not specifically limited and can be strip-shaped, semi-circular, spherical or others, as long as the turbulator effect can be achieved.

[0057] To further improve the heat dissipation effect of the battery pack, referring to Figure 2As shown in the figure, a first heat conduction structure 6 is provided between the first liquid cooling plate 3 and the CCS component 5; and / or, a second heat conduction structure 7 is provided between the second liquid cooling plate 4 and the battery module 2. By means of the first heat conduction structure 6 and / or the second heat conduction structure 7, the heat conduction path is optimized and the thermal resistance is reduced, ensuring that the heat generated by the battery module 2 can be quickly and effectively transferred to the liquid cooling plate and then carried away by the coolant. This not only helps to keep the battery module 2 operating within a suitable temperature range, improve the performance and lifespan of the battery, but also ensures the safe and stable operation of the battery pack. In this Embodiment 1, both the first heat conduction structure 6 and the second heat conduction mechanism exist. Specifically, the first heat conduction structure 6 includes a plurality of heat conduction pads 61. The heat conduction pads 61 are arranged corresponding to the assembly grooves 511. One side of the heat conduction pad 61 is in contact with the connecting piece 52 in the assembly groove 511, and the other side is in contact with the first liquid cooling plate 3, ensuring that the heat generated by each connecting piece 52 can be effectively transferred to the first liquid cooling plate 3 through the heat conduction pad 61. Preferably, the area of the heat conduction pad 61 is equivalent to the area of the assembly groove 511. On the side of the second liquid cooling plate 4 facing the battery module 2, a concave supporting groove 411 is provided, that is, the supporting groove 411 is arranged on the second flow channel plate 41. The battery module 2 is assembled in the supporting groove 411. This kind of contact not only ensures the stability of the battery module 2, but also improves the heat conduction efficiency. Preferably, the second heat conduction structure 7 includes a plurality of heat conduction strips 71. The heat conduction strips 71 are located in the supporting groove 411 and are arranged at intervals along the length direction of the second liquid cooling plate 4. The heat conduction strips 71 are respectively in contact with the battery module 2 and the second flow channel plate 41 of the second liquid cooling plate 4, ensuring the uniform distribution and effective transfer of heat on the battery module 2, and the efficient heat conduction from the battery module 2 to the second liquid cooling plate 4, improving the heat dissipation effect. Optimally, the thickness of the heat conduction strip 71 is less than the depth of the supporting groove 411 to ensure that the heat conduction strip 71 can be completely embedded in the supporting groove 411, closely fit with the battery module 2 and the second liquid cooling plate 4, reduce the thermal resistance, and improve the heat conduction efficiency. Preferably, the first heat conduction structure 6 and the second heat conduction structure 7 are thermal conductive adhesives.

[0058] In other embodiments, the first heat conduction structure 6 and the second heat conduction mechanism may exist independently, and the specific structure is not specifically limited, as long as good heat conduction can be achieved.

[0059] In some embodiments, refer to Figure 1 、 Figure 8As shown, in order to improve the maintainability of the battery pack, a maintenance window 9 is provided on the battery housing. Specifically, there are electrical components 8 on the battery housing. The electrical components 8 include a fire sprinkler 81, a communication interface 82, an explosion-proof valve 83, a positive high-voltage connection socket 84, a negative high-voltage connection socket 85, a battery management unit 86, and a fuse 87. The battery management unit 86 and the fuse 87 are covered by the maintenance window 9 and can be removed, repaired, or replaced when the battery pack needs to be overhauled.

[0060] In summary, a battery pack provided by the present utility model has the following technical effects:

[0061] 1. By respectively providing a first opening 11 and a second opening 12 on both sides of the battery box body 1 and assembling a first liquid cooling plate 3 and a second liquid cooling plate 4, comprehensive coverage of the battery module 2 is achieved. This design ensures that the heat generated by the battery module 2 can be evenly and effectively absorbed and carried away by the liquid cooling plate, thereby avoiding the problem of uneven heat distribution and improving the overall heat dissipation effect;

[0062] 2. The design of the cover outside the liquid cooling plate is cancelled, and the liquid cooling plate is directly in contact with the external environment, reducing the thermal resistance and enabling the heat to be transferred to the coolant more quickly, improving the heat exchange efficiency. This design can ensure that the heat generated by the battery module 2 during high-power charging and discharging can be taken away in time, keeping the battery module 2 within an appropriate working temperature range.

[0063] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, multiple improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A battery pack, characterized in that, Comprising: A battery box body (1), on one side of the battery box body (1) there is a first opening (11), and on the side of the battery box body (1) opposite to the first opening (11) there is a second opening (12); A battery module (2), the battery module (2) is assembled inside the battery box body (1); A first liquid cooling plate (3), the first liquid cooling plate (3) is assembled at the first opening (11) of the battery box body (1); A second liquid cooling plate (4), the second liquid cooling plate (4) is assembled at the second opening (12) of the battery box body (1); A CCS component (5), the CCS component (5) is arranged between the battery module (2) and the first liquid cooling plate (3).

2. The battery pack according to claim 1, characterized in that, The first liquid cooling plate (3) includes: A first flow channel plate (31); A first flat plate (32), the first flat plate (32) is buckled to the first flow channel plate (31), a first liquid cooling flow channel (33) is formed between the first flow channel plate (31) and the first flat plate (32), and the first liquid cooling flow channel (33) is provided with a first liquid cooling inlet (35) and a first liquid cooling outlet (36).

3. A battery pack according to claim 2, characterized in that, On the first flow channel plate (31) there is an installation platform (311) recessed into the first liquid cooling flow channel (33), and on the first flat plate (32) corresponding to the installation platform (311) there is an installation hole (321), and the installation platform (311) is assembled in the installation hole (321).

4. A battery pack according to claim 2, characterized in that, On the first flat plate (32) there are reinforcing ribs (34) recessed towards the first liquid cooling flow channel (33); and / or, on the first flat plate (32) there are reinforcing ribs (34) protruding in a direction away from the first liquid cooling flow channel (33).

5. A battery pack according to claim 1, characterized in that, The second liquid cooling plate (4) includes: A second flow channel plate (41); A second flat plate (42), the second flat plate (42) is buckled to the second flow channel plate (41), a second liquid cooling flow channel (43) formed between the second flow channel plate (41) and the second flat plate (42), and the second liquid cooling flow channel (43) is provided with a second liquid cooling inlet (47) and a second liquid cooling outlet (48).

6. A battery pack according to claim 5, wherein In the second liquid cooling flow channel (43) there is a flow dividing rib (44) arranged along the length direction of the second flow channel plate (41).

7. A battery pack according to claim 6, characterized in that, In the second liquid cooling flow channel (43) there are flow disturbing ribs (45) arranged towards the flow dividing rib (44); and / or, on the flow dividing rib (44) there are flow disturbing bumps (46).

8. A battery pack according to any one of claims 1-7, characterized in that, A first heat conduction structure (6) is arranged between the first liquid cooling plate (3) and the CCS component (5); and / or, a second heat conduction structure (7) is arranged between the second liquid cooling plate (4) and the battery module (2).

9. A battery pack according to claim 8, characterized in that The CCS component (5) includes: A plastic bracket (51), the plastic bracket (51) is provided with a plurality of assembly grooves (511); Connection pieces (52), at least one of the connection pieces (52) is assembled in each of the assembly grooves (511); A collection wire harness (53), the collection wire harness (53) is connected to each of the connection pieces (52); Wherein, the thickness of the connecting piece (52) is not higher than the depth of the assembly groove (511).

10. A battery pack according to claim 9, characterized in that, The first heat conduction structure (6) includes a plurality of heat conduction pads (61), the heat conduction pads (61) are arranged corresponding to the assembly grooves (511), one side of the heat conduction pads (61) is in contact with the connecting piece (52) in the assembly groove (511), and the other side is in contact with the first liquid cooling plate (3).

11. A battery pack according to claim 8, characterized in that, On the side of the second liquid cooling plate (4) facing the battery module (2), a concave supporting groove (411) is provided, and the battery module (2) is assembled in the supporting groove (411).

12. A battery pack according to claim 11, wherein, The second heat conduction structure (7) includes a plurality of heat conduction bars (71), and the heat conduction bars (71) are arranged at intervals along the length direction of the second liquid cooling plate (4).

13. A battery pack according to claim 12, wherein, The thickness of the heat conduction bar (71) is less than the depth of the supporting groove (411).

14. A battery pack according to claim 1, wherein, A maintenance window (9) is provided on the battery module (2).

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