Liquid cooling system, battery pack and electric device

Abstract

The utility model provides a kind of liquid cooling system, battery pack and electric equipment, liquid cooling system includes multiple liquid cooling panels and shunt structure, multiple liquid cooling panels include first liquid cooling panel and second liquid cooling panel;Shunt structure includes shunt plate, first liquid inlet plate, first liquid outlet plate, second liquid inlet plate and second liquid outlet plate, shunt plate has total liquid inlet and total liquid outlet;Wherein, first liquid inlet plate is communicated total liquid inlet and the liquid inlet of first liquid cooling panel, first liquid outlet plate is communicated total liquid outlet and the liquid outlet of first liquid cooling panel, second liquid inlet plate is communicated total liquid inlet and the liquid inlet of second liquid cooling panel, second liquid outlet plate is communicated total liquid outlet and the liquid outlet of second liquid cooling panel.Through shunt plate, first liquid inlet plate, first liquid outlet plate, second liquid inlet plate and second liquid outlet plate etc. Plate body structure is used as shunt structure, replace the shunt pipe design of circular section, can realize more accurate throttling effect, also can reduce the space occupation of system, to improve the overall performance and applicability of liquid cooling system.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal management technology, specifically to liquid cooling systems, battery packs, and electrical equipment. Background Technology

[0002] In liquid cooling systems, to meet the specific coolant flow requirements of different liquid cooling plates, manifolds are typically used to distribute the coolant to each plate. By properly designing the diameter of the manifolds, it can be ensured that the coolant is delivered to each liquid cooling plate according to a predetermined ratio and flow rate, thereby achieving effective heat exchange for different components.

[0003] However, manifold designs often struggle to achieve precise flow control, potentially leading to excessive or insufficient coolant supply to certain liquid cooling plates, thus affecting overall heat exchange efficiency. Secondly, to ensure sufficient flow capacity, existing manifolds typically have large diameters, increasing the system's space requirements. Utility Model Content

[0004] The embodiments of this utility model provide a liquid cooling system, a battery pack, and electrical equipment, which can improve the technical problems of poor throttling effect of the shunt pipe and increased space occupation due to large pipe diameter in related technologies.

[0005] In a first aspect, embodiments of the present invention provide a liquid cooling system, comprising:

[0006] Multiple liquid cooling plates, including a first liquid cooling plate and a second liquid cooling plate; and,

[0007] The diversion structure includes a diversion plate, a first inlet plate, a first outlet plate, a second inlet plate, and a second outlet plate, wherein the diversion plate has a main inlet and a main outlet.

[0008] The first liquid inlet plate is connected to the main liquid inlet and the liquid inlet of the first liquid cooling plate; the first liquid outlet plate is connected to the main liquid outlet and the liquid outlet of the first liquid cooling plate; the second liquid inlet plate is connected to the main liquid inlet and the liquid inlet of the second liquid cooling plate; and the second liquid outlet plate is connected to the main liquid outlet and the liquid outlet of the second liquid cooling plate.

[0009] In one embodiment, both the first liquid cooling plate and the second liquid cooling plate extend along a first direction, and the length of the first liquid cooling plate is less than the length of the second liquid cooling plate;

[0010] The flow area of ​​the first liquid inlet plate is smaller than that of the second liquid inlet plate, and the flow area of ​​the first liquid outlet plate is smaller than that of the second liquid outlet plate.

[0011] In one embodiment, the first liquid inlet plate, the first liquid outlet plate, the second liquid inlet plate, and the second liquid outlet plate all extend along a first direction;

[0012] The second liquid cooling plate has a first section and a second section arranged along a first direction;

[0013] The first liquid cooling plate and the second liquid cooling plate are arranged along the second direction and are positioned opposite to the first segment in the second direction;

[0014] The diversion structure is arranged along the first liquid cooling plate in the first direction and is opposite to the second section in the second direction. The diversion plate extends upward in the third direction. One end of the diversion plate is connected to the first liquid inlet plate and the second liquid inlet plate on both sides in the first direction, and the other end of the diversion plate is connected to the first liquid outlet plate and the second liquid outlet plate on both sides in the first direction. The first direction, the second direction and the third direction intersect each other.

[0015] In one embodiment, in a third direction, the size of the flow channel of the first inlet plate is comparable to the size of the flow channel of the second inlet plate; and in a second direction, the size of the flow channel of the first inlet plate is smaller than the size of the flow channel of the second inlet plate; and / or,

[0016] In the third direction, the size of the flow channel of the first liquid outlet plate is equivalent to the size of the flow channel of the second liquid outlet plate. In the second direction, the size of the flow channel of the first liquid outlet plate is smaller than the size of the flow channel of the second liquid outlet plate.

[0017] In one embodiment, a plurality of first liquid cooling plates are provided, and the plurality of first liquid cooling plates are arranged along the second direction. The first liquid inlet plate is connected to the total liquid inlet and the liquid inlet of one of the first liquid cooling plates, and the first liquid outlet plate is connected to the total liquid outlet and the liquid outlet of one of the first liquid cooling plates.

[0018] The liquid cooling system further includes a first connecting pipe and a second connecting pipe. The first connecting pipe is connected between the liquid inlets of two adjacent first liquid cooling plates, and the second connecting pipe is connected between the liquid outlets of two adjacent first liquid cooling plates, so that multiple first liquid cooling plates are connected in parallel.

[0019] In one embodiment, a plurality of second liquid cooling plates are provided, and the plurality of second liquid cooling plates are arranged along the second direction. The second liquid inlet plate is connected to the total liquid inlet and the liquid inlet of one of the second liquid cooling plates, and the second liquid outlet plate is connected to the total liquid outlet and the liquid outlet of one of the second liquid cooling plates.

[0020] The liquid cooling system further includes a third connecting pipe and a fourth connecting pipe. The third connecting pipe is connected between the liquid inlets of two adjacent second liquid cooling plates, and the fourth connecting pipe is connected between the liquid outlets of two adjacent second liquid cooling plates, so that multiple second liquid cooling plates are connected in parallel.

[0021] In one embodiment, a plurality of first liquid cooling plates and a plurality of second liquid cooling plates are arranged adjacent to each other along a second direction;

[0022] The first liquid cooling plate adjacent to the plurality of second liquid cooling plates is connected to the first liquid inlet plate and the first liquid outlet plate, and the second liquid cooling plate adjacent to the plurality of first liquid cooling plates is connected to the second liquid inlet plate and the second liquid outlet plate.

[0023] In one embodiment, the liquid cooling system further includes a flow plate, a fifth connecting pipe, and a sixth connecting pipe, the flow plate extending in a third direction;

[0024] The second liquid inlet plate is connected to one end of the fifth connecting pipe through the flow plate, and the liquid inlet of the second liquid cooling plate adjacent to the plurality of first liquid cooling plates is connected to the other end of the fifth connecting pipe. The second liquid outlet plate is connected to one end of the sixth connecting pipe through the flow plate, and the liquid outlet of the second liquid cooling plate adjacent to the plurality of first liquid cooling plates is connected to the other end of the sixth connecting pipe.

[0025] In one embodiment, at least one of the first connecting pipe, the second connecting pipe, the third connecting pipe, and the fourth connecting pipe is a corrugated pipe; and / or,

[0026] At least one of the fifth connecting pipe and the sixth connecting pipe is made of an elastic material.

[0027] In one embodiment, the first liquid cooling plate includes a first flat tube and a first current collector and a second current collector respectively connected to the two ends of the first flat tube. The first flat tube is provided with two first liquid channels. The liquid inlet and liquid outlet of the first liquid cooling plate are both located in the first current collector and are respectively connected to one end of the two first liquid channels. The other ends of the two first liquid channels are connected through the second current collector.

[0028] In one embodiment, the size of the first current collector connecting the first inlet plate and the first outlet plate in the second direction is larger than the size of the other first current collectors in the first direction.

[0029] In one embodiment, the second liquid cooling plate includes a second flat tube and a third and a fourth current collector connected to the two ends of the second flat tube respectively. The second flat tube is provided with two second liquid channels. The liquid inlet and liquid outlet of the second liquid cooling plate are both located in the third current collector and are respectively connected to one end of the two second liquid channels. The other ends of the two second liquid channels are connected through the fourth current collector.

[0030] In one embodiment, the liquid cooling system further includes an inlet nozzle and an outlet nozzle, the inlet nozzle being connected to the main inlet and the outlet nozzle being connected to the main outlet.

[0031] Secondly, embodiments of the present invention provide a battery pack including multiple battery cells and the aforementioned liquid cooling system, wherein multiple liquid cooling plates are used for heat exchange with the multiple battery cells.

[0032] In one embodiment, each of the liquid cooling plates extends along a first direction, and the plurality of liquid cooling plates are spaced apart in a second direction;

[0033] The plurality of battery cells include a plurality of battery cell rows arranged along a second direction, each battery cell row including a plurality of battery cells arranged along a first direction, and two battery cell rows are provided between two adjacent liquid cooling plates.

[0034] Thirdly, embodiments of this utility model provide an electrical device including the battery pack described above.

[0035] The beneficial effects of the embodiments of this utility model are as follows:

[0036] In embodiments of this invention, a plate structure consisting of a manifold, a first inlet plate, a first outlet plate, a second inlet plate, and a second outlet plate serves as the flow distribution structure, replacing the circular cross-section manifold design. This achieves more precise control over the coolant flow rate. Specifically, the plate structure allows for the construction of non-circular cross-section flow channels (such as rectangular, trapezoidal, or other irregular cross-sections). The shape and size of the flow channels (such as width, height, and length) can be flexibly adjusted according to actual needs, thereby more precisely regulating fluid resistance and achieving an ideal throttling effect. This ensures that each liquid cooling plate receives an appropriate amount of coolant, greatly improving the system's cooling efficiency and stability. Furthermore, compared to traditional large-diameter manifolds, the thickness dimension of the plate structure is significantly reduced. This allows for a substantial reduction in the system's space occupancy in the thickness direction while maintaining sufficient flow capacity, making the entire liquid cooling system more compact and reducing design difficulties caused by space constraints. In summary, by using plate structures such as a flow divider, a first inlet plate, a first outlet plate, a second inlet plate, and a second outlet plate as the flow divider structure, a more precise throttling effect can be achieved, and the space occupied by the system can be reduced, thereby improving the overall performance and applicability of the liquid cooling system. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a three-dimensional schematic diagram of the liquid cooling system provided in an embodiment of this utility model;

[0039] Figure 2 yes Figure 1 A front view diagram of the liquid cooling system in the diagram;

[0040] Figure 3 yes Figure 1 Right view schematic diagram of the liquid cooling system in the diagram;

[0041] Figure 4 yes Figure 3 Schematic diagram of the cross section at point AA;

[0042] Figure 5 yes Figure 1 A three-dimensional schematic diagram of some components of the liquid cooling system in the image;

[0043] Figure 6 yes Figure 5 A front view diagram of the structure in the diagram;

[0044] Figure 7 yes Figure 6 Schematic diagram of the cross section at point BB;

[0045] Figure 8 This is a perspective view of the battery pack provided in an embodiment of the present invention.

[0046] Figure label:

[0047] 1000. Battery pack; 100. Liquid cooling system; 1. First liquid cooling plate; 101. First flat tube; 102. First current collector; 103. Second current collector; 2. Second liquid cooling plate; 201. Second flat tube; 202. Third current collector; 203. Fourth current collector; 3. Diverter plate; 4. First liquid inlet plate; 5. First liquid outlet plate; 6. Second liquid inlet plate; 7. Second liquid outlet plate; 8. First connecting pipe; 9. Second connecting pipe; 10. Third connecting pipe; 11. Fourth connecting pipe; 12. Flow plate; 13. Fifth connecting pipe; 14. Sixth connecting pipe; 15. Liquid inlet nozzle; 16. Liquid outlet nozzle; 200. Battery cell. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, 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.

[0049] Please see Figures 1 to 3 ( Figure 1 (The direction of coolant flow is indicated by a straight arrow). This application proposes a liquid cooling system 100, including multiple liquid cooling plates and a flow distribution structure. The multiple liquid cooling plates include a first liquid cooling plate 1 and a second liquid cooling plate 2. The flow distribution structure includes a flow distribution plate 3, a first liquid inlet plate 4, a first liquid outlet plate 5, a second liquid inlet plate 6, and a second liquid outlet plate 7. The flow distribution plate 3 has a total liquid inlet (not shown in the figure, but can be understood by referring to the connection position of the liquid inlet nozzle 15) and a total liquid outlet (not shown in the figure, but can be understood by referring to the connection position of the liquid outlet nozzle 16). The first liquid inlet plate 4 connects the total liquid inlet and the liquid inlet of the first liquid cooling plate 1, the first liquid outlet plate 5 connects the total liquid outlet and the liquid outlet of the first liquid cooling plate 1, the second liquid inlet plate 6 connects the total liquid inlet and the liquid inlet of the second liquid cooling plate 2, and the second liquid outlet plate 7 connects the total liquid outlet and the liquid outlet of the second liquid cooling plate 2.

[0050] In the technical solution of this application, a plate structure consisting of a flow divider plate 3, a first inlet plate 4, a first outlet plate 5, a second inlet plate 6, and a second outlet plate 7 is used as the flow divider structure, replacing the circular cross-section flow divider pipe design, thus achieving more precise control of the coolant flow rate. Specifically, the plate structure allows for the construction of non-circular cross-section flow channels (such as rectangular, trapezoidal, or other irregular cross-sections), and the shape and size of the flow channels (such as width, height, and length) can be flexibly adjusted according to actual needs, thereby more precisely adjusting fluid resistance and achieving an ideal throttling effect. This ensures that each liquid cooling plate receives an appropriate amount of coolant, greatly improving the cooling efficiency and stability of the system. Furthermore, compared to traditional large-diameter flow dividers, the thickness dimension of the plate structure is significantly reduced, which can greatly reduce the space occupied by the system in its thickness direction while ensuring sufficient flow capacity, making the entire liquid cooling system 100 more compact and reducing the design difficulty caused by space constraints. In summary, by adopting plate structures such as the flow divider 3, the first liquid inlet plate 4, the first liquid outlet plate 5, the second liquid inlet plate 6, and the second liquid outlet plate 7 as the flow divider structure, a more precise throttling effect can be achieved, and the space occupied by the system can be reduced, thereby improving the overall performance and applicability of the liquid cooling system 100.

[0051] It should be noted that, depending on the application scenario, the liquid cooling system 100 can perform not only cooling operations but also heating operations. Specifically, by adjusting the temperature of the coolant, the liquid cooling system 100 can flexibly switch between heating and cooling modes under different operating conditions to meet various thermal management needs. Whether rapid cooling is required to prevent overheating or necessary heating in low-temperature environments to maintain optimal operating temperature, the liquid cooling system 100 can efficiently and precisely regulate the temperature, ensuring that the equipment is always in optimal operating condition.

[0052] Please see Figure 1In some embodiments of this application, both the first liquid cooling plate 1 and the second liquid cooling plate 2 extend along a first direction, with the length of the first liquid cooling plate 1 being less than the length of the second liquid cooling plate 2; the flow area of ​​the first liquid inlet plate 4 is less than the flow area of ​​the second liquid inlet plate 6, and the flow area of ​​the first liquid outlet plate 5 is less than the flow area of ​​the second liquid outlet plate 7. In these embodiments, by designing the first liquid cooling plate 1 and the second liquid cooling plate 2 to extend along the first direction with different lengths, and by adjusting the flow areas of the first liquid inlet plate 4 and the second liquid inlet plate 6, as well as the first liquid outlet plate 5 and the second liquid outlet plate 7, precise control of the coolant flow rate can be achieved, thereby meeting the actual heat exchange requirements of liquid cooling plates of different lengths. Specifically, since the length of the first liquid cooling plate 1 is less than the length of the second liquid cooling plate 2, it requires relatively less coolant, so the flow area of ​​the first liquid inlet plate 4 is designed to be smaller to meet this requirement; while the longer second liquid cooling plate 2 requires more coolant to ensure effective heat exchange, so the flow area of ​​the second liquid inlet plate 6 is larger to ensure sufficient coolant can flow in. Meanwhile, to match the design of the first inlet plate 4 and the second inlet plate 6 and ensure effective coolant discharge and stable system operation, the flow area of ​​the first outlet plate 5 is smaller than that of the second outlet plate 7. This avoids coolant accumulation in the shorter first liquid cooling plate 1 and ensures that the coolant in the longer second liquid cooling plate 2 can be quickly discharged after heat exchange. In summary, by optimizing the design of the length of the liquid cooling plates and the corresponding inlet and outlet plate flow areas, not only is precise regulation of coolant flow rate achieved, but the cooling efficiency and stability of the entire liquid cooling system 100 are also effectively improved, ensuring that each liquid cooling plate receives a suitable cooling effect, further enhancing the overall performance and applicability of the system.

[0053] Please see Figure 1In some embodiments of this application, the first liquid inlet plate 4, the first liquid outlet plate 5, the second liquid inlet plate 6, and the second liquid outlet plate 7 all extend along a first direction; the second liquid cooling plate 2 has a first segment (not shown in the figure, but understood with reference to the part opposite to the first liquid cooling plate 1) and a second segment (not shown in the figure, but understood with reference to the rest of the second liquid cooling plate 2) arranged along the first direction; the first liquid cooling plate 1 and the second liquid cooling plate 2 are arranged along a second direction (i.e., the plate thickness direction referred to herein), and are opposite to the first segment in the second direction; the diversion structure is arranged along the first direction with the first liquid cooling plate 1, and is opposite to the second segment in the second direction; the diversion plate 3 extends in a third direction, one end of the diversion plate 3 is connected to the first liquid inlet plate 4 and the second liquid inlet plate 6 on both sides of the first direction, and the other end of the diversion plate 3 is connected to the first liquid outlet plate 5 and the second liquid outlet plate 7 on both sides of the first direction, and the first direction, the second direction, and the third direction intersect each other. In these embodiments, by designing the first inlet plate 4, the first outlet plate 5, the second inlet plate 6, and the second outlet plate 7 to all extend along a first direction, and dividing the second liquid-cooled plate 2 into a first segment and a second segment arranged along the first direction, while arranging the first liquid-cooled plate 1 and the second liquid-cooled plate 2 along a second direction and opposite to the first segment in the second direction, and the flow-diverting structure arranged along the first direction with the first liquid-cooled plate 1 and opposite to the second segment in the second direction, a compact layout and optimized configuration of the internal components of the cooling system are achieved. Furthermore, the flow-diverting plate 3 extends upwards in a third direction, with one end connecting to the first inlet plate 4 and the second inlet plate 6 on both sides in the first direction, and the other end connecting to the first outlet plate 5 and the second outlet plate 7, forming a highly efficient fluid distribution network. This design not only allows for precise distribution of coolant according to the actual needs of each liquid-cooled plate, but also ensures the compactness and efficiency of the entire system. Specifically, by rationally arranging the direction and position of each component, the space occupied by the system can be minimized, while ensuring smooth and unobstructed flow of coolant into and out of each liquid-cooled plate, improving the overall heat exchange efficiency and stability of the system.

[0054] It should be noted that the included angles between any two of the first direction, the second direction, and the third direction are not limited and can be 80°, 85°, 90°, 95°, or 100°. In some embodiments, the included angles between any two of the first direction, the second direction, and the third direction are 90°.

[0055] Please see Figure 1 and Figure 2In some embodiments of this application, in the third direction, the dimensions of the flow channels of the first inlet plate 4 and the second inlet plate 6 are comparable, while in the second direction, the dimensions of the flow channels of the first inlet plate 4 are smaller than those of the second inlet plate 6. In these embodiments, by making the dimensions of the flow channels of the first inlet plate 4 and the second inlet plate 6 comparable in the third direction, and making the dimensions of the flow channels of the first inlet plate 4 smaller than those of the second inlet plate 6 in the second direction, precise control of the coolant flow rate is achieved. This design takes into account the actual heat exchange requirements of different liquid cooling plates; that is, the longer second liquid cooling plate 2 requires more coolant to maintain its high heat exchange efficiency, therefore its corresponding second inlet plate 6 has a larger flow area to ensure sufficient coolant inflow. Conversely, the shorter first liquid cooling plate 1 has lower heat exchange requirements, resulting in a smaller flow area for its corresponding first inlet plate 4, avoiding unnecessary coolant waste. Furthermore, the consistent dimensions in the third direction ensure the compactness and consistency of the entire flow distribution structure, helping to reduce system complexity and improve space utilization. In summary, by differentiating the dimensions of the first inlet plate 4 and the second inlet plate 6 in different directions, not only is the precise distribution of coolant flow achieved, but the overall cooling efficiency and stability of the system are also improved.

[0056] Please see Figure 1 , Figure 3 and Figure 4 In some embodiments of this application, in the third direction, the dimensions of the flow channel of the first liquid outlet plate 5 are comparable to those of the second liquid outlet plate 7, while in the second direction, the dimensions of the flow channel of the first liquid outlet plate 5 are smaller than those of the second liquid outlet plate 7. In these embodiments, by making the dimensions of the flow channels of the first liquid outlet plate 5 and the second liquid outlet plate 7 comparable in the third direction, and making the dimensions of the flow channel of the first liquid outlet plate 5 smaller than those of the second liquid outlet plate 7 in the second direction, flow management during coolant discharge is optimized. This design is based on the differences in heat exchange requirements of each liquid cooling plate. The longer second liquid cooling plate 2 requires a larger outlet channel to quickly discharge coolant after heat exchange, preventing efficiency loss due to coolant stagnation. In contrast, the shorter first liquid cooling plate 1 has lower heat exchange requirements and a smaller inflow of coolant, so its smaller outlet channel is sufficient to meet its discharge needs. Simultaneously, the consistent dimensions in the third direction ensure the consistency and compactness of the entire flow distribution structure, reducing unnecessary space occupation and material consumption. In summary, by optimizing the dimensions of the first outlet plate 5 and the second outlet plate 7 in different directions, not only is the efficiency of coolant discharge and the stability of the system improved, but the overall performance and applicability of the liquid cooling system 100 are also further enhanced.

[0057] Please see Figures 1 to 3In some embodiments of this application, multiple first liquid cooling plates 1 are provided, arranged along a second direction. A first liquid inlet plate 4 connects the main liquid inlet to the liquid inlet of one of the first liquid cooling plates 1, and a first liquid outlet plate 5 connects the main liquid outlet to the liquid outlet of one of the first liquid cooling plates 1. The liquid cooling system 100 also includes a first connecting pipe 8 and a second connecting pipe 9. The first connecting pipe 8 connects between the liquid inlets of two adjacent first liquid cooling plates 1, and the second connecting pipe 9 connects between the liquid outlets of two adjacent first liquid cooling plates 1, so that the multiple first liquid cooling plates 1 are connected in parallel. In these embodiments, by arranging multiple first liquid cooling plates 1 along a second direction, and using the first liquid inlet plate 4 and the first liquid outlet plate 5 to connect the main liquid inlet and the main liquid outlet to the liquid inlet and the liquid outlet of one of the first liquid cooling plates 1 respectively, and introducing the first connecting pipe 8 and the second connecting pipe 9 to connect the liquid inlets and the liquid outlets of two adjacent first liquid cooling plates 1 respectively, the parallel connection between the multiple first liquid cooling plates 1 is realized. This parallel structure ensures uniform distribution of coolant among the multiple first liquid cooling plates 1, avoiding uneven heat dissipation caused by excessive or insufficient flow rate from a single first liquid cooling plate 1. Simultaneously, the parallel connection ensures a relatively stable coolant flow rate for each first liquid cooling plate 1, improving the overall heat dissipation efficiency and reliability of the liquid cooling system 100. Furthermore, this design enhances the system's flexibility and scalability, allowing for adjustments to the number and layout of the first liquid cooling plates 1 according to actual heat dissipation requirements. The number of first liquid cooling plates 1 can be two, three (as shown in the figure), four, or other quantities to meet different heat dissipation needs and system design requirements.

[0058] Please see Figures 1 to 3In some embodiments of this application, multiple second liquid cooling plates 2 are provided, arranged along a second direction. A second liquid inlet plate 6 connects the main liquid inlet to the liquid inlet of one of the second liquid cooling plates 2, and a second liquid outlet plate 7 connects the main liquid outlet to the liquid outlet of one of the second liquid cooling plates 2. The liquid cooling system 100 also includes a third connecting pipe 10 and a fourth connecting pipe 11. The third connecting pipe 10 connects between the liquid inlets of two adjacent second liquid cooling plates 2, and the fourth connecting pipe 11 connects between the liquid outlets of two adjacent second liquid cooling plates 2, so that the multiple second liquid cooling plates 2 are connected in parallel. In these embodiments, by arranging multiple second liquid cooling plates 2 along a second direction, and using the second liquid inlet plate 6 and the second liquid outlet plate 7 to connect the main liquid inlet and the main liquid outlet to the liquid inlet and the liquid outlet of one of the second liquid cooling plates 2 respectively, and introducing the third connecting pipe 10 and the fourth connecting pipe 11 to connect the liquid inlets and the liquid outlets of two adjacent second liquid cooling plates 2 respectively, the parallel connection between the multiple second liquid cooling plates 2 is realized. This parallel structure ensures uniform distribution of coolant among the multiple second liquid cooling plates 2, avoiding uneven heat dissipation caused by excessive or insufficient flow rate from a single second liquid cooling plate 2. Simultaneously, the parallel connection ensures a relatively stable coolant flow rate for each second liquid cooling plate 2, improving the overall heat dissipation efficiency and reliability of the liquid cooling system 100. Furthermore, this design enhances the system's flexibility and scalability, allowing for adjustments to the number and layout of the liquid cooling plates according to actual heat dissipation needs. The number of second liquid cooling plates 2 can be two, three, four (as shown in the figure), or other quantities to meet different heat dissipation requirements and system design specifications.

[0059] Please see Figures 1 to 3In some embodiments of this application, a plurality of first liquid cooling plates 1 and a plurality of second liquid cooling plates 2 are arranged adjacent to each other along a second direction; wherein, the first liquid cooling plate 1 adjacent to the plurality of second liquid cooling plates 2 is connected to a first liquid inlet plate 4 and a first liquid outlet plate 5; the second liquid cooling plate 2 adjacent to the plurality of first liquid cooling plates 1 is connected to a second liquid inlet plate 6 and a second liquid outlet plate 7. In these embodiments, the plurality of first liquid cooling plates 1 are arranged along the second direction, the plurality of second liquid cooling plates 2 are arranged along the second direction, and the plurality of first liquid cooling plates 1 and the plurality of second liquid cooling plates 2 are arranged adjacent to each other along the second direction, that is, the plurality of first liquid cooling plates 1 are arranged along the second direction to form a liquid cooling plate group, and the plurality of second liquid cooling plates 2 are also arranged along the same direction to form another liquid cooling plate group. The two liquid cooling plate groups are arranged along the second direction and do not intersect each other. The first liquid cooling plate 1, located at the junction of the two liquid cooling plate groups, is responsible for the input and output of coolant for the corresponding liquid cooling plate group through the first inlet plate 4 and the first outlet plate 5. The second liquid cooling plate 2, located at the junction, completes the input and output of coolant for its corresponding liquid cooling plate group through the second inlet plate 6 and the second outlet plate 7. This design not only achieves precise control and uniform distribution of coolant flow but also ensures the compactness and efficiency of the entire system. By clearly separating the two liquid cooling plate groups and allowing each to independently manage its coolant flow path, the system structure is simplified, unnecessary piping complexity is reduced, and space utilization is improved. Furthermore, this design enhances system maintainability; when one liquid cooling plate group needs maintenance or replacement, it will not affect the normal operation of the other group, thereby enhancing the system's stability and flexibility. In summary, this optimized layout significantly improves the heat dissipation efficiency, reliability, and adaptability of the liquid cooling system 100.

[0060] Please see Figures 1 to 3In some embodiments of this application, the liquid cooling system 100 further includes a flow plate 12, a fifth connecting pipe 13, and a sixth connecting pipe 14. The flow plate 12 extends in a third direction. A second inlet plate 6 is connected to one end of the fifth connecting pipe 13 via the flow plate 12, and the inlet of the second liquid cooling plate 2 adjacent to the plurality of first liquid cooling plates 1 is connected to the other end of the fifth connecting pipe 13. A second outlet plate 7 is connected to one end of the sixth connecting pipe 14 via the flow plate 12, and the outlet of the second liquid cooling plate 2 adjacent to the plurality of first liquid cooling plates 1 is connected to the other end of the sixth connecting pipe 14. In these embodiments, by introducing the flow plate 12, the fifth connecting pipe 13, and the sixth connecting pipe 14, an indirect connection is achieved between the second liquid cooling plate 2 adjacent to the plurality of first liquid cooling plates 1 and the second inlet plate 6 and the second outlet plate 7, thereby leaving sufficient space between adjacent first liquid cooling plates 1 and second liquid cooling plates 2 for the installation of external heat exchange components. Specifically, the second inlet plate 6 is connected to one end of the fifth connecting pipe 13 via the flow plate 12, while the inlet of the second liquid cooling plate 2, adjacent to the multiple first liquid cooling plates 1, is connected to the other end of the fifth connecting pipe 13. Similarly, the second outlet plate 7 is connected to one end of the sixth connecting pipe 14 via the flow plate 12, while the outlet of the second liquid cooling plate 2 is connected to the other end of the sixth connecting pipe 14. This design not only ensures that the coolant can be efficiently and evenly distributed to each liquid cooling plate, but also greatly simplifies the system layout and reduces the space constraints and complexity that may result from direct connections. In addition, it improves the system's flexibility and maintainability, making component installation and replacement easier, and providing ample space and support for integrating various external devices. In summary, this optimized design significantly improves the heat dissipation efficiency, compactness, and adaptability of the liquid cooling system 100.

[0061] Please see Figures 1 to 3 In some embodiments of this application, at least one of the first connecting pipe 8, the second connecting pipe 9, the third connecting pipe 10, and the fourth connecting pipe 11 is a corrugated pipe. In these embodiments, designing at least one of the first connecting pipe 8, the second connecting pipe 9, the third connecting pipe 10, and the fourth connecting pipe 11 as a corrugated pipe significantly improves the flexibility and adaptability of the liquid cooling system 100. The corrugated pipe design effectively absorbs displacement and vibration during pipe installation, reducing the risk of pipe damage caused by thermal expansion or mechanical stress. Specifically, the elastic structure of the corrugated pipe allows it to expand, contract, and bend within a certain range, thereby compensating for minor positional deviations between different liquid cooling plates, ensuring smooth flow of coolant, and avoiding pressure loss and uneven flow caused by rigid pipe connections. Furthermore, this design simplifies system installation and maintenance, reduces the requirements for precise alignment, and improves system reliability and durability. In summary, using corrugated pipes as connecting pipes not only enhances the stability and flexibility of the liquid cooling system 100 but also extends the system's service life.

[0062] Please see Figures 1 to 3 In some embodiments of this application, at least one of the fifth connecting pipe 13 and the sixth connecting pipe 14 is made of an elastic material. In these embodiments, by designing at least one of the fifth connecting pipe 13 and the sixth connecting pipe 14 to be made of an elastic material, the adaptability and reliability of the liquid cooling system 100 are further optimized. Connecting pipes made of elastic materials have good flexibility and shock absorption properties, effectively absorbing vibration and displacement during system operation and preventing leakage and damage caused by external stress or internal pressure fluctuations. Furthermore, the use of elastic materials simplifies complex installation steps, reduces the need for precise positioning and fixing, and makes the system easier to assemble and maintain.

[0063] Please see Figure 1 , Figures 5 to 7 ( Figure 7 (The direction of coolant flow is indicated by a straight arrow). In some embodiments of this application, the first liquid cooling plate 1 includes a first flat tube 101 and a first collector 102 and a second collector 103 connected to both ends of the first flat tube 101. The first flat tube 101 contains two first liquid channels. The inlet and outlet of the first liquid cooling plate 1 are both located in the first collector 102 and are connected to one end of each of the two first liquid channels. The other ends of the two first liquid channels are connected through the second collector 103. In these embodiments, by designing the first liquid cooling plate 1 to include a first flat tube 101 and a first collector 102 and a second collector 103 connected to both ends of the first flat tube 101, and by providing two first liquid channels within the first flat tube 101, the inlet and outlet of the first liquid cooling plate 1 are both located in the first collector 102 and are connected to one end of each of the two first liquid channels, while the other ends of the two first liquid channels are connected through the second collector 103. This achieves efficient flow and uniform distribution of coolant within the first liquid cooling plate 1. Specifically, this dual-channel design not only increases the flow path of the coolant and improves heat exchange efficiency, but also ensures that the coolant is evenly distributed to each channel through the manifold, avoiding localized overheating or insufficient cooling. Furthermore, since both the inlet and outlet are located in the first manifold 102, the design of external piping connections is simplified, potential leakage points are reduced, and the system's reliability and ease of installation are improved. In summary, this optimized design significantly enhances the heat dissipation performance and stability of the first liquid cooling plate 1, while also improving the overall reliability and maintenance convenience of the system.

[0064] In some examples, the first flat tube 101 is a serpentine flat tube, which can better adapt to the shape of external components (such as cylindrical battery cells 200), thereby increasing the heat exchange contact area and heat exchange efficiency, and ensuring a more uniform and efficient heat exchange effect.

[0065] Please see Figure 1 , Figure 5 and Figure 6 In some embodiments of this application, the dimension of the first manifold 102 connecting the first inlet plate 4 and the first outlet plate 5 in the second direction is larger than the dimension of the other first manifolds 102 in the first direction. This design makes it easier to connect the first flat tube 101 to the first inlet plate 4 and the first outlet plate 5, which are located at a certain distance, via the first manifold 102. By increasing the dimension of the first manifold 102 in the second direction, the flow distribution structure including the first inlet plate 4 and the first outlet plate 5 is allowed to be closer to the second liquid cooling plate 2, thereby achieving a more compact structure. This layout not only optimizes the flow path of the coolant but also improves the overall space utilization of the system, enhancing the adaptability and flexibility of the liquid cooling system 100 in complex environments.

[0066] Please see Figure 1 In some embodiments of this application, the second liquid cooling plate 2 includes a second flat tube 201 and a third manifold 202 and a fourth manifold 203 respectively connected to both ends of the second flat tube 201. The second flat tube 201 contains two second liquid channels. The inlet and outlet of the second liquid cooling plate 2 are both located in the third manifold 202 and are connected to one end of each of the two second liquid channels. The other ends of the two second liquid channels are connected through the fourth manifold 203. In these embodiments, by designing the second liquid cooling plate 2 to include a second flat tube 201 and the third manifold 202 and fourth manifold 203 respectively connected to both ends of the second flat tube 201, and by providing two second liquid channels within the second flat tube 201, the inlet and outlet of the second liquid cooling plate 2 are both located in the third manifold 202 and are connected to one end of each of the two second liquid channels, while the other ends of the two second liquid channels are connected through the fourth manifold 203. This achieves efficient flow and uniform distribution of coolant within the second liquid cooling plate 2. This dual-channel design not only increases the coolant flow path and improves heat exchange efficiency, but also ensures that the coolant is evenly distributed to each channel through the manifold, avoiding localized overheating or insufficient cooling. Furthermore, since both the inlet and outlet are located in the third manifold 202, the design of external piping connections is simplified, potential leakage points are reduced, and the system's reliability and ease of installation are improved. In summary, this optimized design significantly enhances the heat dissipation performance and stability of the second liquid cooling plate 2, while also improving the overall system reliability and maintenance convenience.

[0067] In some examples, the second flat tube 201 is a serpentine flat tube, which can better adapt to the shape of external components (such as cylindrical battery cells 200), thereby increasing the heat exchange contact area and heat exchange efficiency, and ensuring a more uniform and efficient heat exchange effect.

[0068] Please see Figure 1 and Figure 5 In some embodiments of this application, the liquid cooling system 100 further includes an inlet nozzle 15 and an outlet nozzle 16. The inlet nozzle 15 is connected to a main inlet, and the outlet nozzle 16 is connected to a main outlet. In these embodiments, the introduction of the inlet nozzle 15 and the outlet nozzle 16 provides a more convenient and efficient interface for the input and output of coolant. The inlet nozzle 15 ensures that coolant enters the liquid cooling system 100 at a stable pressure and flow rate, while the outlet nozzle 16 effectively guides the coolant out of the system, thereby achieving smooth circulation of the coolant. This structure not only improves the overall operating efficiency of the system but also enhances its reliability and maintainability, facilitating quick connection and disconnection of the coolant supply in practical applications, further improving the practicality and flexibility of the liquid cooling system 100.

[0069] Please see Figure 8 This application also proposes a battery pack 1000, which includes a plurality of battery cells 200 and a liquid cooling system 100. The liquid cooling system 100 has multiple liquid cooling plates for heat exchange with the plurality of battery cells 200, and the structure of the liquid cooling system 100 is as described above. Since this battery pack 1000 adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0070] Please see Figure 8In some embodiments of this application, each liquid cooling plate (including a first liquid cooling plate 1 and a second liquid cooling plate 2) extends along a first direction, and the plurality of liquid cooling plates are spaced apart in a second direction; the plurality of battery cells 200 include a plurality of battery cell rows arranged along the second direction, each battery cell row including a plurality of battery cells 200 arranged along the first direction, and two battery cell rows are provided between two adjacent liquid cooling plates. In these embodiments, by designing each liquid cooling plate to extend along the first direction and spaced apart in the second direction, while arranging the plurality of battery cells 200 into a plurality of battery cell rows arranged along the second direction, each battery cell row including a plurality of battery cells 200 arranged along the first direction, and providing two battery cell rows between two adjacent liquid cooling plates, an optimal balance between efficient thermal management and space utilization is achieved. Specifically, for each cell 200, each cell array has a liquid cooling plate for heat exchange. Besides the liquid cooling plates located at the boundaries of multiple cells 200, there is a cell array on each side of the other liquid cooling plates. This allows two cell arrays to share a single liquid cooling plate, enabling the coolant to uniformly and efficiently cover and cool these cells 200. This not only avoids the problem of uneven or insufficient heat exchange caused by a single liquid cooling plate handling too many cells 200, but also reduces the number of liquid cooling plates used in a limited space, thus saving space, maximizing the number of cells 200, increasing the energy density of the battery pack 1000, and maintaining good heat exchange performance. In summary, by placing two cell arrays between two adjacent liquid cooling plates, not only is efficient thermal management achieved, but the space utilization and overall performance of the battery pack 1000 are also significantly improved.

[0071] Thirdly, embodiments of this utility model provide an electrical device, which includes a battery pack 1000, the structure of which is as described above. Since this electrical device employs all the technical solutions of the above embodiments, it at least possesses the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0072] The electrical equipment can be vehicles, energy storage power supplies, consumer electronics, medical equipment, smart cities, etc., and this application does not make any specific restrictions.

[0073] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. 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 utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A liquid cooling system, characterized in that, include: Multiple liquid cooling plates, including a first liquid cooling plate and a second liquid cooling plate; and, The diversion structure includes a diversion plate, a first inlet plate, a first outlet plate, a second inlet plate, and a second outlet plate, wherein the diversion plate has a main inlet and a main outlet. The first liquid inlet plate is connected to the main liquid inlet and the liquid inlet of the first liquid cooling plate; the first liquid outlet plate is connected to the main liquid outlet and the liquid outlet of the first liquid cooling plate; the second liquid inlet plate is connected to the main liquid inlet and the liquid inlet of the second liquid cooling plate; and the second liquid outlet plate is connected to the main liquid outlet and the liquid outlet of the second liquid cooling plate.

2. The liquid cooling system according to claim 1, characterized in that, Both the first liquid cooling plate and the second liquid cooling plate extend along a first direction, and the length of the first liquid cooling plate is less than the length of the second liquid cooling plate. The flow area of ​​the first liquid inlet plate is smaller than that of the second liquid inlet plate, and the flow area of ​​the first liquid outlet plate is smaller than that of the second liquid outlet plate.

3. The liquid cooling system according to claim 2, characterized in that, The first liquid inlet plate, the first liquid outlet plate, the second liquid inlet plate, and the second liquid outlet plate all extend along the first direction; The second liquid cooling plate has a first section and a second section arranged along a first direction; The first liquid cooling plate and the second liquid cooling plate are arranged along the second direction and are positioned opposite to the first segment in the second direction; The diversion structure is arranged along the first liquid cooling plate in the first direction and is opposite to the second section in the second direction. The diversion plate extends upward in the third direction. One end of the diversion plate is connected to the first liquid inlet plate and the second liquid inlet plate on both sides in the first direction, and the other end of the diversion plate is connected to the first liquid outlet plate and the second liquid outlet plate on both sides in the first direction. The first direction, the second direction and the third direction intersect each other.

4. The liquid cooling system according to claim 3, characterized in that, In the third direction, the size of the flow channel of the first inlet plate is comparable to the size of the flow channel of the second inlet plate; in the second direction, the size of the flow channel of the first inlet plate is smaller than the size of the flow channel of the second inlet plate; and / or, In the third direction, the size of the flow channel of the first liquid outlet plate is equivalent to the size of the flow channel of the second liquid outlet plate. In the second direction, the size of the flow channel of the first liquid outlet plate is smaller than the size of the flow channel of the second liquid outlet plate.

5. The liquid cooling system according to claim 3, characterized in that, The first liquid cooling plate is provided in multiple ways, and the multiple first liquid cooling plates are arranged along the second direction. The first liquid inlet plate is connected to the total liquid inlet and the liquid inlet of one of the first liquid cooling plates, and the first liquid outlet plate is connected to the total liquid outlet and the liquid outlet of one of the first liquid cooling plates. The liquid cooling system further includes a first connecting pipe and a second connecting pipe. The first connecting pipe is connected between the liquid inlets of two adjacent first liquid cooling plates, and the second connecting pipe is connected between the liquid outlets of two adjacent first liquid cooling plates, so that multiple first liquid cooling plates are connected in parallel.

6. The liquid cooling system according to claim 5, characterized in that, The second liquid cooling plate is provided in multiple ways, and the multiple second liquid cooling plates are arranged along the second direction. The second liquid inlet plate is connected to the total liquid inlet and the liquid inlet of one of the second liquid cooling plates, and the second liquid outlet plate is connected to the total liquid outlet and the liquid outlet of one of the second liquid cooling plates. The liquid cooling system further includes a third connecting pipe and a fourth connecting pipe. The third connecting pipe is connected between the liquid inlets of two adjacent second liquid cooling plates, and the fourth connecting pipe is connected between the liquid outlets of two adjacent second liquid cooling plates, so that multiple second liquid cooling plates are connected in parallel.

7. The liquid cooling system according to claim 6, characterized in that, A plurality of first liquid cooling plates and a plurality of second liquid cooling plates are arranged adjacent to each other along a second direction; The first liquid cooling plate adjacent to the plurality of second liquid cooling plates is connected to the first liquid inlet plate and the first liquid outlet plate, and the second liquid cooling plate adjacent to the plurality of first liquid cooling plates is connected to the second liquid inlet plate and the second liquid outlet plate.

8. The liquid cooling system according to claim 7, characterized in that, The liquid cooling system also includes a flow plate, a fifth connecting pipe and a sixth connecting pipe, wherein the flow plate extends in a third direction; The second liquid inlet plate is connected to one end of the fifth connecting pipe through the flow plate, and the liquid inlet of the second liquid cooling plate adjacent to the plurality of first liquid cooling plates is connected to the other end of the fifth connecting pipe. The second liquid outlet plate is connected to one end of the sixth connecting pipe through the flow plate, and the liquid outlet of the second liquid cooling plate adjacent to the plurality of first liquid cooling plates is connected to the other end of the sixth connecting pipe.

9. The liquid cooling system according to claim 8, characterized in that, At least one of the first connecting pipe, the second connecting pipe, the third connecting pipe, and the fourth connecting pipe is a corrugated pipe; and / or, At least one of the fifth connecting pipe and the sixth connecting pipe is made of an elastic material.

10. The liquid cooling system according to any one of claims 1 to 9, characterized in that, The first liquid cooling plate includes a first flat tube, and a first current collector and a second current collector respectively connected to the two ends of the first flat tube. The first flat tube is provided with two first liquid channels. The liquid inlet and liquid outlet of the first liquid cooling plate are both located in the first current collector and are respectively connected to one end of the two first liquid channels. The other ends of the two first liquid channels are connected through the second current collector.

11. The liquid cooling system according to claim 10, characterized in that, The size of the first current collector connecting the first inlet plate and the first outlet plate in the second direction is larger than the size of the other first current collectors in the first direction.

12. The liquid cooling system according to any one of claims 1 to 9, characterized in that, The second liquid cooling plate includes a second flat tube and a third and a fourth current collector connected to the two ends of the second flat tube respectively. The second flat tube has two second liquid channels. The liquid inlet and liquid outlet of the second liquid cooling plate are both located in the third current collector and are connected to one end of the two second liquid channels respectively. The other ends of the two second liquid channels are connected through the fourth current collector.

13. The liquid cooling system according to any one of claims 1 to 9, characterized in that, The liquid cooling system also includes an inlet nozzle and an outlet nozzle, the inlet nozzle being connected to the main inlet and the outlet nozzle being connected to the main outlet.

14. A battery pack, characterized in that, It includes multiple battery cells and a liquid cooling system as described in any one of claims 1 to 13, wherein the multiple liquid cooling plates are used for heat exchange with the multiple battery cells.

15. The battery pack according to claim 14, characterized in that, Each of the liquid cooling plates extends along a first direction, and the plurality of liquid cooling plates are spaced apart in a second direction; The plurality of battery cells include a plurality of battery cell rows arranged along a second direction, each battery cell row including a plurality of battery cells arranged along a first direction, and two battery cell rows are provided between two adjacent liquid cooling plates.

16. An electrical appliance, characterized in that, Includes the battery pack as described in claim 14 or 15.

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