Battery system and vehicle

Abstract

The application provides a battery system and a vehicle, and belongs to the technical field of batteries. The battery system comprises a system framework, and the system framework comprises a plurality of sub-boxes which are stacked along a first direction. A separation assembly comprises a liquid cooling plate. At least part of the sub-boxes are provided with battery modules, and the battery modules are in contact with the separation assembly. A liquid cooling unit is further arranged in the sub-box, and the liquid cooling unit is connected with the liquid cooling plate. The system framework is used for being fixed with a vehicle body. The battery system provided by the application can integrate the battery modules, the liquid cooling unit and the system framework, so that the space occupied by the battery system is reduced while the large capacity is ensured.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery system and a vehicle. Background Technology

[0002] In related technologies, the rear battery systems for commercial vehicles and trucks typically involve the automaker designing the overall frame structure, the battery manufacturer providing standard battery packs, and then multiple battery packs being installed within the automaker's frame to form a complete system. However, when the capacity is large, the low integration between the battery pack and the automaker's frame during assembly can easily lead to a high overall height of the battery system, increasing the space occupied and affecting vehicle safety and aerodynamic drag. Utility Model Content

[0003] The embodiments of this application provide a battery system and vehicle that can integrate battery modules with the system framework, thereby reducing the space occupied by the battery system while ensuring a large capacity.

[0004] In a first aspect, embodiments of this application provide a battery system, comprising:

[0005] The system framework includes multiple sub-boxes stacked along a first direction, with adjacent sub-boxes separated by a partition assembly; wherein the partition assembly includes a liquid cooling plate.

[0006] At least a portion of the sub-box contains a battery module, and the battery module is in contact with the separator assembly;

[0007] The sub-box also houses a liquid cooling unit, which is connected to a liquid cooling plate. The system frame is used to fix the sub-box to the vehicle body.

[0008] The system frame comprises multiple sub-boxes stacked in the first direction, with at least some sub-boxes housing battery modules, ensuring a sufficient number of battery modules to meet the demands of high capacity. Adjacent sub-boxes are separated by a partition assembly including a liquid cooling plate, ensuring the battery system's heat dissipation performance. The system frame can be used to fix the battery to the vehicle body, saving automakers the reassembly process. Furthermore, since the battery modules and liquid cooling unit are directly integrated with the system frame, the overall integration is improved, reducing the battery system's space occupation in the vehicle, enhancing vehicle safety, and reducing wind resistance during driving. In addition, assembling the battery modules with the system frame saves automakers the assembly process, improving assembly efficiency and reducing assembly costs. In short, the battery system provided in this application integrates battery modules, liquid cooling unit, and system frame, ensuring high capacity while reducing the battery system's space occupation.

[0009] In some embodiments, the system frame includes at least one border and at least one partition component spaced apart along a first direction to divide the system frame into a plurality of sub-boxes stacked along the first direction.

[0010] By combining frame and partition components, the overall structural strength of the system frame can be improved, and the system frame can be divided into multiple appropriately sized sub-boxes according to the size and number of battery modules, thus optimizing the space layout and improving the overall space utilization.

[0011] In some embodiments, the system frame includes a plurality of borders stacked along a first direction, wherein the borders of each sub-box are independently arranged and the plurality of sub-boxes are interconnected.

[0012] By setting the frame of each sub-cell independently, the flexibility of the battery system can be improved. The number of sub-cells can be adjusted according to power demand, and they can be replaced individually during maintenance, reducing maintenance costs.

[0013] In some embodiments, the system frame includes a frame and multiple sub-boxes with their corresponding frames integrally formed.

[0014] By integrating the frames of multiple sub-boxes into a single unit, the overall structural strength of the system frame can be improved, the assembly process can be simplified, integration can be increased, and space utilization can be improved.

[0015] In some embodiments, at least one ear assembly is provided on the inner wall of the frame, which is spaced apart along a first direction, and the separator assembly is connected to the frame through the ear assembly.

[0016] The lugs on the inner wall of the frame provide mounting points for the divider components, improving the assembly efficiency between the divider components and the frame, and providing good mechanical support to ensure the installation strength between the two.

[0017] In some embodiments, the liquid cooling plate is a double-layer liquid cooling plate, which includes two liquid cooling sub-plates stacked along a first direction.

[0018] By incorporating a double-layer liquid cooling plate, the liquid cooling plate can dissipate heat from the battery modules and other electrical components in both the upper and lower sub-boxes, thereby improving the heat dissipation effect, increasing the integration of the battery system, reducing the number of components in the system, and saving material costs.

[0019] In some embodiments, the separator further includes a thermally conductive adhesive layer disposed on at least one side of the liquid cooling plate in a first direction.

[0020] By adding a thermally conductive adhesive layer, the heat transfer efficiency between the liquid cooling plate and the battery module can be improved, thereby enhancing the heat dissipation effect. In addition, the thermally conductive adhesive layer also has adhesive and buffering properties, which can improve the structural stability of the battery system.

[0021] In some embodiments, the battery system further includes a high- and low-voltage execution unit, which is electrically connected to the battery module.

[0022] The high and low voltage actuators are located inside the sub-box.

[0023] By setting up high and low voltage actuators in the battery system, the interaction performance between the high and low voltage actuators and the battery module can be improved, and the software, communication and interface of the battery system can be standardized. This eliminates the need for automakers to assemble the system separately, simplifies the assembly process, and saves assembly costs.

[0024] In some embodiments, the battery system further includes an expansion tank connected to a liquid cooling plate and a liquid cooling unit, and the expansion tank is disposed within a sub-tank.

[0025] The expansion tank can maintain the stability of the coolant in the liquid cooling plate by absorbing or releasing coolant, thus ensuring stable heat dissipation.

[0026] In some embodiments, the high- and low-pressure actuators and the liquid-cooled unit are disposed at the end of the system frame in a first direction.

[0027] By placing the high- and low-voltage actuators and the liquid cooling unit at the end of the system frame in the first direction, the spatial layout of the battery system can be optimized, interference between the high- and low-voltage actuators and the liquid cooling unit and the battery module can be reduced, electrical safety can be improved, and maintenance convenience can be enhanced.

[0028] In some embodiments, a portion of the sub-box includes a plurality of battery modules, which are spaced apart along a second direction and / or along a third direction.

[0029] Among them, the first direction, the second direction, and the third direction are all perpendicular to each other.

[0030] By placing multiple battery modules within the sub-box and arranging them at intervals along a second and / or third direction, the height of the battery system in the first direction can be reduced while maintaining a large capacity, thus optimizing the spatial layout of the battery system and improving space utilization. The spaced arrangement of multiple battery modules ensures efficient heat dissipation and temperature uniformity, and also improves maintenance convenience.

[0031] Secondly, embodiments of this application provide a vehicle including the battery system described above.

[0032] The vehicle provided in this application embodiment has all the beneficial effects of the battery system described above, which will not be repeated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the longitudinal cross-sectional structure of a battery system according to an embodiment of this application. Figure 1 ;

[0035] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of a battery system according to another embodiment provided in this application. Figure 1 ;

[0036] Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of a battery system according to an embodiment of this application. Figure 2 ;

[0037] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of a battery system according to another embodiment provided in this application. Figure 2 ;

[0038] Figure 5 yes Figure 3 Enlarged view of point A in the middle;

[0039] Figure 6 yes Figure 4 Enlarged view of point B in the middle;

[0040] Figure 7 This application provides a schematic diagram of the cross-sectional structure of a battery system according to another embodiment.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100. Battery system; 10. System frame; 11. Sub-box; 111. Frame; 1111. Hanger assembly; 112. Separator assembly; 1121. Liquid cooling plate; 1122. Thermally conductive adhesive layer; 114. Insulating beam; 20. Battery module; 31. High and low voltage actuators; 32. Liquid cooling unit; 33. Expansion tank. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0044] Firstly, such as Figures 1-2 As shown, an embodiment of this application provides a battery system 100, including a system frame 10. The system frame 10 includes a plurality of sub-boxes 11 stacked along a first direction X. Adjacent sub-boxes 11 are separated by a separator assembly 112, wherein the separator assembly 112 includes a liquid cooling plate 1121. At least a portion of the sub-boxes 11 contain battery modules 20, and the battery modules 20 are in contact with the separator assembly 112. A liquid cooling unit 32 is also provided within the sub-boxes 11, and the liquid cooling unit 32 is connected to the liquid cooling plate 1121. The system frame 10 is used to fix to the vehicle body.

[0045] Multiple sub-boxes 11 are stacked in the first direction X of the system frame 10, and at least some of the sub-boxes 11 contain battery modules 20, ensuring a sufficient number of battery modules 20 to meet the demand for high capacity. Adjacent sub-boxes 11 are separated by a partition assembly 112 including a liquid cooling plate 1121, ensuring the heat dissipation performance of the battery system 100. The system frame 10 can be used to fix the battery to the vehicle body, saving the automaker from the reassembly process. Furthermore, since the battery modules 20 and the liquid cooling unit 32 are directly integrated with the system frame 10, the overall integration is improved, the space occupied by the battery system 100 in the vehicle is reduced, vehicle safety is improved, and wind resistance during driving is reduced. In addition, by assembling the battery modules 20 with the system frame 10, the automaker's assembly process is saved, assembly efficiency is improved, and assembly costs are reduced. In other words, the battery system 100 provided in this application can integrate the battery modules 20 and the liquid cooling unit 32 with the system frame 10, ensuring high capacity while reducing the space occupied by the battery system 100.

[0046] The chiller unit 32 may include components such as a water pump, a heat exchanger, and pipe interfaces, which can provide circulating power to the liquid cooling plate 1121.

[0047] In related technologies, the overall frame of the rear battery system 100 for commercial vehicles and trucks is usually designed and manufactured by the vehicle manufacturer, while the battery manufacturer provides standard small battery packs. The vehicle manufacturer then installs the standard small battery packs into the overall frame. In addition, the liquid cooling unit in the liquid cooling system is usually external, resulting in a low integration of the battery system 100. When the battery capacity of the battery system 100 reaches 450 kWh or more, the overall height of the battery system 100 is level with or even higher than the front of the vehicle, which does not benefit the safety of vehicle driving and results in greater wind resistance during driving, affecting the vehicle's registration.

[0048] The battery system 100 provided in this application directly integrates the battery module 20 with the system frame 10, eliminating the need to first prepare a standard small battery pack. This enables CTB (Cell to Body) or CTP (Cell to Pack) designs, resulting in higher integration and reduced space occupation, thus saving space for the same battery capacity. Furthermore, the battery system 100 uses a partition assembly 112, including a liquid cooling plate 1121, for separation, and houses the liquid cooling unit 32 within the sub-box 11, improving integration while ensuring the heat dissipation performance of the battery system 100. The system frame 10 can be directly fixed to the vehicle body, eliminating the need for automakers to assemble the standard small battery pack, liquid cooling unit, and vehicle frame, thus improving assembly efficiency and reducing assembly costs. In addition, the battery system 100 provided in this application offers excellent flexibility, allowing the number of battery modules 20 to be increased or decreased according to user needs, thereby meeting the requirements of different users.

[0049] In some embodiments, such as Figure 3 and Figure 4 As shown, the system frame 10 includes at least one border 111 and at least one partition component 112 spaced apart along the first direction X to divide the system frame 10 into a plurality of sub-boxes 11 stacked along the first direction X.

[0050] By combining the frame 111 and the partition component 112, the overall structural strength of the system frame 10 can be improved, and the system frame 10 can be divided into multiple appropriately sized sub-boxes 11 according to the size and number of battery modules 20, thereby optimizing the spatial layout and improving the overall space utilization.

[0051] The frame 111 and the separator 112 can be made of aluminum extrusion profiles, which have the advantages of being lightweight and high-strength, and have efficient thermal conductivity, which helps to improve the heat dissipation effect of the battery system 100.

[0052] In some embodiments, such as Figure 3As shown, the system framework 10 includes multiple borders 111 stacked along the first direction X. The borders 111 of each sub-box 11 are set independently, and the multiple sub-boxes 11 are connected to each other.

[0053] That is, each sub-box 11 is independent of each other. By making the frame 111 of each sub-box 11 independent of each other, the flexibility of the battery system 100 can be improved. The number of sub-boxes 11 can be adjusted according to power demand, and they can be replaced individually during maintenance, reducing maintenance costs.

[0054] It is understood that in this embodiment, after multiple sub-boxes 11 are stacked along the first direction X, they can be connected into a whole by mechanical locking or by welding.

[0055] In some embodiments, such as Figure 4 As shown, the system framework 10 includes a frame 111, and the frame 111 of multiple sub-boxes 11 is integrally formed.

[0056] By making the frame 111 of multiple sub-boxes 11 integrally molded, the overall structural strength of the system frame 10 can be improved, the assembly process can be simplified, the integration can be improved, and the space utilization can be increased.

[0057] In some embodiments, such as Figure 6 As shown, at least one ear assembly 1111 is provided on the inner wall of the frame 111, which is arranged at intervals along the first direction X. The separator assembly 112 is connected to the frame 111 through the ear assembly 1111.

[0058] The lug assembly 1111 provided on the inner wall of the frame 111 can provide an installation point for the partition assembly 112, improve the assembly efficiency of the partition assembly 112 and the frame 111, and provide good mechanical support to ensure the installation strength between the two.

[0059] In some embodiments, such as Figures 3-6 As shown, the liquid cooling plate 1121 is a double-layer liquid cooling plate 1121, which includes two liquid cooling sub-plates stacked along the first direction X.

[0060] By including a double-layer liquid cooling plate 1121 in the liquid cooling plate 1121, the double-layer liquid cooling plate 1121 can dissipate heat for the battery module 20 and other electrical components in the upper and lower sub-boxes 11, thereby improving the heat dissipation effect, increasing the integration of the battery system 100, reducing the number of components in the system, and saving material costs.

[0061] In some embodiments, such as Figure 5As shown, the separator 112 also includes a thermally conductive adhesive layer 1122, which is disposed on at least one side of the liquid cooling plate 1121 in the first direction X.

[0062] By setting the thermally conductive adhesive layer 1122, the thermal conduction efficiency between the liquid cooling plate 1121 and the battery module 20 can be improved, thereby improving the heat dissipation effect. In addition, the thermally conductive adhesive layer 1122 also has adhesive and buffering properties, which can improve the structural stability of the battery system 100.

[0063] In some embodiments, such as Figures 1-4 As shown, the battery system 100 also includes a high-low voltage execution unit 31, which is electrically connected to the battery module 20. The high-low voltage execution unit 31 is located within the sub-box 11.

[0064] In related technologies, in the rear battery system 100 of commercial vehicles and trucks, the battery pack and high and low voltage actuators 31 are usually purchased by the car manufacturer from multiple suppliers. Different software and control logic strategies exist between the components, which makes the overall system interaction cumbersome and prone to failure. Moreover, car manufacturers usually use manual assembly to assemble multiple components, resulting in high assembly costs. Furthermore, due to the coupling of quality and technology of multiple suppliers, the assembly quality is uncontrollable.

[0065] This application embodiment, by setting a high-low voltage execution unit 31 in the battery system 100, can unify the software and control logic between the high-low voltage execution unit 31, the liquid cooling unit 32 and the battery module 20, improve the interaction performance between the high-low voltage execution unit 31 and the liquid cooling unit 32 and the battery module 20, realize the standardization of the software, communication and interface of the battery system 100, eliminate the need for separate assembly by car manufacturers, simplify the assembly process and save assembly costs.

[0066] The high and low voltage execution unit 31 may include components such as a battery management system (BMS), fuses, high voltage power distribution modules and busbars to realize high and low voltage control of the battery module 20.

[0067] In some embodiments, such as Figure 1 and Figure 3 As shown, the battery system 100 also includes an expansion tank 33, which is connected to the liquid cooling plate 1121 and the liquid cooling unit 32. The expansion tank 33 is located inside the sub-box 11.

[0068] The expansion tank 33 can maintain the stability of the coolant in the liquid cooling plate 1121 by absorbing or releasing coolant, thus ensuring stable heat dissipation.

[0069] In some embodiments, such as Figures 1-4As shown, the high and low pressure actuator 31 and the liquid cooling unit 32 are located at the end of the system frame 10 in the first direction X.

[0070] By placing the high and low voltage actuator 31 and the liquid cooling unit 32 at the end of the system frame 10 in the first direction X, the spatial layout of the battery system 100 can be optimized, the interference between the high and low voltage actuator 31 and the liquid cooling unit 32 and the battery module 20 can be reduced, electrical safety can be improved, and the convenience of maintenance can be enhanced.

[0071] For example, such as Figures 1-4 As shown, the high and low pressure execution unit 31 and the liquid cooling unit 32 are both located at the bottom of the system frame 10 in the first direction X.

[0072] In some embodiments, such as Figure 7 As shown, a portion of the sub-box 11 includes multiple battery modules 20, which are arranged at intervals along the second direction Y and / or the third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular.

[0073] By arranging multiple battery modules 20 in the sub-box 11 at intervals along the second direction Y and / or the third direction Z, the height of the battery system 100 in the first direction X can be reduced while maintaining a large capacity, thus optimizing the spatial layout of the battery system 100 and improving space utilization. The interval arrangement of multiple battery modules 20 can ensure heat dissipation efficiency and temperature uniformity, and improve maintenance convenience.

[0074] In some embodiments, such as Figure 7 As shown, the battery system 100 also includes an insulating beam 114, through which battery modules 20 in the same sub-box 11 are isolated. By setting the insulating beam 114, insulation isolation can be achieved for multiple battery modules 20 in the same sub-box 11, reducing mutual interference between multiple battery modules 20, and the setting of the insulating beam 114 can also improve the structural strength of the sub-box 11.

[0075] Secondly, embodiments of this application provide a vehicle including the battery system 100 as described above.

[0076] The vehicle provided in this application embodiment has all the beneficial effects of the battery system 100 as described above, which will not be repeated here.

[0077] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery system, characterized in that, The system includes a system framework comprising a plurality of sub-boxes stacked along a first direction, with adjacent sub-boxes separated by a partition assembly; wherein the partition assembly includes a liquid cooling plate. At least a portion of the sub-box contains a battery module, and the battery module is in contact with the partition assembly; The sub-box also houses a liquid cooling unit, which is connected to the liquid cooling plate. The system frame is used to fix the vehicle body.

2. The battery system according to claim 1, characterized in that, The system frame includes at least one border and at least one partition component spaced apart along the first direction to divide the system frame into a plurality of sub-boxes stacked along the first direction.

3. The battery system according to claim 2, characterized in that, The system framework includes a plurality of frame edges stacked along the first direction, wherein the frame edges of each sub-box are independently arranged, and the plurality of sub-boxes are interconnected.

4. The battery system according to claim 2, characterized in that, The system framework includes a frame, and the frame corresponding to the plurality of sub-boxes is integrally formed.

5. The battery system according to claim 4, characterized in that, At least one hanging ear assembly is provided on the inner wall of the frame, which is spaced apart along the first direction, and the separating component is connected to the frame through the hanging ear assembly.

6. The battery system according to claim 1, characterized in that, The liquid cooling plate is a double-layer liquid cooling plate, which includes two liquid cooling sub-plates stacked along the first direction.

7. The battery system according to claim 1, characterized in that, The separation assembly further includes a thermally conductive adhesive layer disposed on at least one side of the liquid cooling plate in the first direction.

8. The battery system according to claim 1, characterized in that, The battery system also includes a high-low voltage execution unit, which is electrically connected to the battery module. The high and low pressure execution units are located inside the sub-box.

9. The battery system according to claim 8, characterized in that, The battery system also includes an expansion tank, which is connected to the liquid cooling plate and the liquid cooling unit, and is located inside the sub-tank.

10. The battery system according to claim 8, characterized in that, The high and low pressure actuators and the liquid cooling unit are located at the ends of the system frame in the first direction.

11. The battery system according to any one of claims 1-10, characterized in that, The sub-box includes a plurality of battery modules, which are spaced apart along a second direction and / or a third direction. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

12. A vehicle, characterized in that, Includes the battery system as described in any one of claims 1-11.

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