Liquid cooling plate and battery pack

Abstract

The utility model discloses a liquid cooling plate and a battery pack, and relates to the technical field of batteries. The liquid cooling plate is provided with a first side and a second side which are arranged oppositely, a first liquid cooling loop and a second liquid cooling loop are formed in the liquid cooling plate, the first liquid cooling loop is arranged close to the first side, and the second liquid cooling loop is arranged close to the second side; the liquid cooling plate is provided with a first liquid inlet, a first liquid outlet, a second liquid inlet and a second liquid outlet, the first liquid inlet and the first liquid outlet are both communicated with the first liquid cooling loop, and the second liquid inlet and the second liquid outlet are both communicated with the second liquid cooling loop. Therefore, the liquid cooling plate is provided with the two spaced liquid cooling loops, and each liquid cooling loop is provided with the liquid inlet and the liquid outlet, so that the battery module can be cooled, heat diffusion is effectively inhibited, and the safety of the whole pack is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a liquid cooling plate and a battery pack. BACKGROUND

[0002] A battery module is the core of a battery pack, and generally a corresponding number of battery monomers is configured according to the size of the required output voltage, and then all the battery monomers are connected to output voltage. However, a battery module releases a large amount of heat during operation, and if effective cooling and heat dissipation are not performed, the service life of the battery module will be affected, and in severe cases, a safety accident will occur due to high temperature. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a liquid cooling plate and a battery pack to solve the technical problem of poor cooling effect of the existing liquid cooling plate on the battery module, which affects the service life and safety performance of the battery module.

[0004] In one aspect, the present application provides a liquid cooling plate, which has a first side and a second side opposite to each other, and a first liquid cooling circuit and a second liquid cooling circuit are formed inside the liquid cooling plate. The first liquid cooling circuit is arranged close to the first side, and the second liquid cooling circuit is arranged close to the second side. The liquid cooling plate is provided with a first liquid inlet, a first liquid outlet, a second liquid inlet and a second liquid outlet, wherein the first liquid inlet and the first liquid outlet are in communication with the first liquid cooling circuit, and the second liquid inlet and the second liquid outlet are in communication with the second liquid cooling circuit.

[0005] In some embodiments, the liquid cooling plate comprises a first cover plate, a second cover plate and a flow channel plate, the flow channel plate is arranged between the first cover plate and the second cover plate, the side surface of the flow channel plate facing the first cover plate has a first groove, the side surface of the flow channel plate facing the second cover plate has a second groove, the first groove and the first cover plate cooperate to form the first liquid cooling circuit, and the second groove and the second cover plate cooperate to form the second liquid cooling circuit. The liquid cooling plate is provided with a first liquid inlet, a first liquid outlet, a second liquid inlet and a second liquid outlet, wherein the first liquid inlet and the first liquid outlet are in communication with the first liquid cooling circuit, and the second liquid inlet and the second liquid outlet are in communication with the second liquid cooling circuit.

[0006] In some embodiments, the flow direction of the cooling medium in the first liquid cooling circuit is opposite to the flow direction of the cooling medium in the second liquid cooling circuit.

[0007] In some embodiments, the first liquid cooling circuit comprises a plurality of first sub-flow channels extending in a first direction, two adjacent first sub-flow channels are connected by a second sub-flow channel at the same end in the first direction, and the flow directions of the cooling medium in the two adjacent first sub-flow channels are opposite; and / or

[0008] The second liquid cooling circuit comprises a plurality of third sub-flow channels extending in a first direction, two adjacent third sub-flow channels are communicated by a fourth sub-flow channel at the same end in the first direction, and the flow directions of the cooling medium in the two adjacent third sub-flow channels are opposite.

[0009] In some embodiments, the first inlet and the first outlet are arranged on one side of the first cover plate away from the flow channel plate, and the first inlet and the first outlet are arranged abutting each other; the second inlet and the second outlet are arranged on one side of the second cover plate away from the flow channel plate, and the second inlet and the second outlet are arranged abutting each other.

[0010] In some embodiments, the first inlet and the second inlet are arranged on one side of the first cover plate away from the flow channel plate, and the first inlet and the second inlet are arranged abutting each other; the first outlet and the second outlet are arranged on one side of the second cover plate away from the flow channel plate, and the first outlet and the second outlet are arranged abutting each other.

[0011] In some embodiments, the flow channel plate is provided with first through holes and second through holes, the first through holes are in communication with the first inlet, the first liquid cooling circuit, or the first through holes are in communication with the second inlet, the second liquid cooling circuit; the second through holes are in communication with the first outlet, the first liquid cooling circuit, or the second through holes are in communication with the second outlet, the second liquid cooling circuit.

[0012] In some embodiments, the first inlet, the second inlet, the first outlet and the second outlet are arranged abutting each other.

[0013] In the second aspect, the application further provides a battery pack, comprising at least two battery groups; and the liquid cooling plate described above, which is arranged between two adjacent battery groups.

[0014] In some embodiments, the battery group comprises a plurality of battery monomers, the battery monomer comprises two first side walls, two second side walls and two end walls, the two first side walls are arranged opposite to each other in a first direction, the two second side walls are arranged opposite to each other in a third direction, and the two end walls are arranged opposite to each other in a second direction, and the liquid cooling plate is arranged between two adjacent second side walls.

[0015] The technical effect of the application is to provide a liquid cooling plate and a battery pack, the liquid cooling plate is provided with two spaced liquid cooling circuits, and each liquid cooling circuit is provided with an inlet and an outlet, so that the battery module can be cooled and cooled, the heat diffusion is effectively inhibited, and the safety of the whole pack is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The technical scheme of the application and other beneficial effects will be apparent from the following detailed description of the specific embodiments of the application with reference to the accompanying drawings.

[0017] Figure 1A partial structural schematic diagram of a battery pack provided for an embodiment of the present application.

[0018] Figure 2 A structural schematic diagram of a battery cell provided for an embodiment of the present application.

[0019] Figure 3 A partial structural schematic diagram of a liquid cooling plate provided for an embodiment of the present application.

[0020] Figure 4 A structural schematic diagram of a flow channel plate provided for an embodiment of the present application.

[0021] Figure 5 A cross-sectional view of a flow channel plate provided for an embodiment of the present application. Figure 4

[0022] The component identifiers in the drawings are as follows:

[0023] 100 battery pack; 1 liquid cooling plate; 11 first cover plate; 12 second cover plate; 13 flow channel plate;

[0024] 111 first side; 112 second side;

[0025] 131 first groove; 1311 first sub-groove; 1312 second sub-groove;

[0026] 132 second groove; 1321 third sub-groove; 1322 fourth sub-groove;

[0027] 134 first through hole; 135 second through hole;

[0028] 10 first liquid cooling circuit; 101 first sub-flow channel; 102 second sub-flow channel;

[0029] 20 second liquid cooling circuit; 201 third sub-flow channel; 202 fourth sub-flow channel;

[0030] 41 first liquid inlet; 42 second liquid inlet;

[0031] 51 first liquid outlet; 52 second liquid outlet;

[0032] 2 battery module; 21 battery cell; 211 first side wall; 212 second side wall; 213 end wall. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] ​In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and arrangements of the specific examples are described in the following. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application can repeat the reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0038] To solve the technical problem that the existing liquid cooling plate has poor cooling effect on the battery module, which affects the service life and safety performance of the battery module. Embodiments of the present application provide a liquid cooling plate and a battery pack comprising the same. The liquid cooling plate has a first side and a second side opposite to each other, and a first liquid cooling circuit and a second liquid cooling circuit are formed in the liquid cooling plate. The first liquid cooling circuit is arranged close to the first side, and the second liquid cooling circuit is arranged close to the second side. The liquid cooling plate is provided with a first liquid inlet, a first liquid outlet, a second liquid inlet and a second liquid outlet. The first liquid inlet and the first liquid outlet are in communication with the first liquid cooling circuit, and the second liquid inlet and the second liquid outlet are in communication with the second liquid cooling circuit. Therefore, the liquid cooling plate of the present application is provided with two spaced liquid cooling circuits, and each liquid cooling circuit is provided with a liquid inlet and a liquid outlet, which can cool the battery module, effectively suppress heat diffusion, and thus improve the safety of the whole pack. The following will be described in detail.

[0039] As shown in Figure 1 The battery pack 100 has a first direction X, a second direction Y and a third direction Z perpendicular to each other.

[0040] As shown in Figures 1-2 The battery pack 100 provided by embodiments of the present application comprises a liquid cooling plate 1 and at least two battery modules 2. The liquid cooling plate 1 is arranged between two adjacent battery modules 2. The liquid cooling plate 1 is used to cool the battery module 2, effectively suppress heat diffusion, and thus improve the safety of the whole pack. Each battery module 2 comprises a plurality of battery monomers 21 arranged along the first direction X. Each battery monomer 21 comprises two first side walls 211, two second side walls 212 and two end walls 213. The two first side walls 211 are arranged opposite to each other in the first direction X. The two second side walls 212 are arranged opposite to each other in the third direction Z. The two end walls 213 are arranged opposite to each other in the second direction Y. The liquid cooling plate 1 is arranged between two adjacent second side walls 212. The first side wall 211 is the largest surface of the battery monomer 21. The end wall 213 is the smallest surface of the battery monomer 21. The area of the second side wall 212 is between that of the first side wall 211 and that of the second side wall 212. At least one of the two end walls 213 is provided with a pole.

[0041] The battery cell 21 includes, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the present disclosure is not limited thereto. The battery pack 100 is a power supply for a power consuming device. The power consuming device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as a power drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.

[0042] As shown in Figures 3-5 The liquid cooling plate 1 has a first side 111 and a second side 112 opposite to each other, and a first liquid cooling circuit 10 and a second liquid cooling circuit 20 are formed inside the liquid cooling plate 1. The first liquid cooling circuit 10 is arranged close to the first side 111, and the second liquid cooling circuit 20 is arranged close to the second side 112. It can be understood that the liquid cooling plate 1 can be an integrally formed structure, and the two liquid cooling circuits arranged at intervals inside the liquid cooling plate 1 are formed by an extrusion molding process.

[0043] The liquid cooling plate 1 is provided with a first liquid inlet 41, a first liquid outlet 51, a second liquid inlet 42, and a second liquid outlet 52. The first liquid inlet 41 and the first liquid outlet 51 are both in communication with the first liquid cooling circuit 10, and the second liquid inlet 42 and the second liquid outlet 52 are both in communication with the second liquid cooling circuit 20, so as to cool and cool the battery module 2 located on at least one side of the liquid cooling plate 1 in the third direction Z, effectively inhibit heat diffusion, and further improve the safety of the whole pack.

[0044] As shown in Figure 3 In this embodiment, the liquid cooling plate 1 includes a first cover plate 11, a second cover plate 12, and a flow channel plate 13.

[0045] As shown in Figure 1 and Figure 3 The first cover plate 11 and the second cover plate 12 are both in a rectangular structure. The surfaces of the first cover plate 11 and the second cover plate 12 are both flat surfaces, so that when the liquid cooling plate 1 is arranged between the two battery modules 2 in the third direction Z, the heat dissipation areas of the two battery modules 2 are completely consistent, the cooling medium contact areas are consistent, and the heat dissipation uniformity is improved.

[0046] The material of the surface of the first cover plate 11 and the second cover plate 12 is the same, for example, can include a metal layer and the outer surface of the metal layer is provided with an insulating layer, so that when the liquid cooling plate 1 is arranged between the two battery modules 2 in the third direction Z, the liquid cooling plate 1 and the battery module 2 can be in insulated contact.

[0047] The flow channel plate 13 is arranged between the first cover plate 11 and the second cover plate 12, the side surface of the flow channel plate 13 facing the first cover plate 11 has a first groove 131, and the side surface of the flow channel plate 13 facing the second cover plate 12 has a second groove 132, the first groove 131 and the first cover plate 11 cooperate to form the first liquid cooling circuit 10, and the second groove 132 and the second cover plate 12 cooperate to form the second liquid cooling circuit 20.

[0048] As shown in Figures 3-5 , the liquid cooling plate 1 is provided with a first liquid inlet 41, a first liquid outlet 51, a second liquid inlet 42 and a second liquid outlet 52, wherein the first liquid inlet 41 and the first liquid outlet 51 are in communication with the first liquid cooling circuit 10, and the second liquid inlet 42 and the second liquid outlet 52 are in communication with the second liquid cooling circuit 20.

[0049] Therefore, the liquid cooling plate 1 is provided with two spaced liquid cooling circuits, and each liquid cooling circuit is provided with a water inlet and a water outlet, so that the battery module 2 can be cooled and the heat diffusion can be effectively inhibited, thereby improving the safety of the whole package.

[0050] As shown in Figures 4-5 , in this embodiment, the flow direction of the cooling medium of the first liquid cooling circuit 10 is opposite to the flow direction of the cooling medium of the second liquid cooling circuit 20. The flow direction design of the liquid cooling plate 1 can realize that the area of each battery monomer 21 is basically consistent, which is beneficial to control the temperature difference between each battery monomer 21. Among them, Figure 4 and Figure 5 the arrow direction represents the flow direction of the cooling medium.

[0051] As shown in Figures 4-5 , the first liquid cooling circuit 10 includes a plurality of first sub-flow channels 101 extending in the first direction X and a plurality of second sub-flow channels 102 extending in the second direction Y, two adjacent first sub-flow channels 101 are connected by the second sub-flow channel 102 at the same end in the first direction X, and the flow direction of the cooling medium in the two adjacent first sub-flow channels 101 is opposite. Among them, the two adjacent first sub-flow channels 101 are connected by the second sub-flow channel 102 to form a U-shaped flow channel, and a plurality of U-shaped flow channels are connected to form an S-shaped first liquid cooling circuit 10, so as to cool and dissipate heat of the battery module 2 and effectively inhibit heat diffusion.

[0052] The second liquid cooling circuit 20 comprises a plurality of third sub-flow channels 201 extending along the first direction X and a plurality of fourth sub-flow channels 202 extending along the second direction Y. Adjacent two third sub-flow channels 201 are communicated by a fourth sub-flow channel 202 at the same end of the first direction X, and the flow directions of the cooling medium in the adjacent two third sub-flow channels 201 are opposite. Moreover, the adjacent two third sub-flow channels 201 are communicated by the fourth sub-flow channel 202 to form a U-shaped flow channel, and a plurality of U-shaped flow channels are communicated to form an S-shaped second liquid cooling circuit 20 to cool and dissipate heat for the battery module 2, effectively inhibiting heat diffusion.

[0053] Therefore, the flow directions of the liquid cooling medium in the first liquid cooling circuit 10 and the second liquid cooling circuit 20 are from the liquid inlet to the liquid outlet. In each liquid cooling circuit, the flow directions of every adjacent two flow channels are designed to be opposite. The temperature of the liquid cooling medium in the flow channel communicated with the liquid inlet of the first liquid cooling circuit 10 is lower, and the temperature of the liquid cooling medium in the flow channel communicated with the liquid outlet of the second liquid cooling circuit 20 is higher. By arranging the flow channel communicated with the liquid inlet of the first liquid cooling circuit 10 adjacent to the flow channel communicated with the liquid outlet of the second liquid cooling circuit 20, the problem of excessively high or low temperature at a certain position of the battery module 2 can be solved, and the temperature difference between each battery monomer 21 can be controlled.

[0054] In an embodiment, the first groove 131 comprises a first sub-groove 1311 extending along the first direction X and a second sub-groove 1312 extending along the second direction Y, and the two ends of the second sub-groove 1312 are respectively communicated with adjacent two first sub-grooves 1311.

[0055] The first sub-groove 1311 and the first cover plate 11 cooperatively form a first sub-flow channel 101 extending along the first direction X, and the second sub-groove 1312 and the first cover plate 11 cooperatively form a second sub-flow channel 102 extending along the second direction Y.

[0056] The second groove 132 comprises a third sub-groove 1321 extending along the first direction X and a fourth sub-groove 1322 extending along the second direction Y, and the two ends of the third sub-groove 1321 are respectively communicated with adjacent two fourth sub-grooves 1322.

[0057] The third sub-groove 1321 and the second cover plate 12 cooperatively form a third sub-flow channel 201, and the fourth sub-groove 1322 and the second cover plate 12 cooperatively form a fourth sub-flow channel 202.

[0058] The flow channel plate 13 can be formed by an extrusion molding process. The flow channel plate 13 can include a plurality of fluidly connected flow channel units, each of which includes two U-shaped flow channels, and one of the two U-shaped flow channels surrounds the other, and the plurality of fluidly connected U-shaped flow channels constitute one first liquid cooling circuit 10 or second liquid cooling circuit 20 arranged in an S shape.

[0059] In one embodiment, the first sub-flow channel 101 is in communication with the first liquid inlet 41, and the second sub-flow channel 102 is in communication with the first liquid outlet 51. The third sub-flow channel 201 is in communication with the second liquid inlet 42, and the fourth sub-flow channel 202 is in communication with the second liquid outlet 52. Therefore, by providing a liquid inlet and a liquid outlet in each liquid cooling circuit, the communication of the two liquid cooling circuits is avoided, which prevents the liquid cooling flow channel from being too long and affecting the cooling effect.

[0060] In one embodiment, the first liquid inlet 41 and the first liquid outlet 51 are both arranged on the side of the first cover plate 11 away from the flow channel plate 13, and the first liquid inlet 41 and the first liquid outlet 51 are arranged abutting each other. In this way, the cooling medium near the first liquid inlet 41 has a lower temperature, and the cooling medium near the first liquid outlet 51 has a higher temperature. The first liquid cooling circuit 10 is designed in a staggered distribution form with high and low temperatures close to each other, which is conducive to more uniform temperature distribution of the entire liquid cooling plate 1. Moreover, it can also reduce the layout of the pipeline, which is conducive to improving the space utilization rate of the battery pack 100.

[0061] Similarly, the second liquid inlet 42 and the second liquid outlet 52 are both arranged on the side of the second cover plate 12 away from the flow channel plate 13, and the second liquid inlet 42 and the second liquid outlet 52 are arranged abutting each other. In this way, the cooling medium near the second liquid inlet 42 has a lower temperature, and the cooling medium near the second liquid outlet 52 has a higher temperature. The second liquid cooling circuit 20 is designed in a staggered distribution form with high and low temperatures close to each other, which is conducive to more uniform temperature distribution of the entire liquid cooling plate 1. Moreover, it can also reduce the layout of the pipeline, which is conducive to improving the space utilization rate of the battery pack 100.

[0062] The first liquid cooling circuit 10 and the second liquid cooling circuit 20 can use different liquid inlet pipes and liquid outlet pipes, so that the flow rates of the cooling medium in the two liquid cooling circuits can be controlled separately, which can effectively control the cooling effect of the battery module 2.

[0063] In one embodiment, the first liquid inlet 41 and the second liquid inlet 42 are arranged on the side of the first cover plate 11 away from the flow channel plate 13, and the first liquid inlet 41 and the second liquid inlet 42 are arranged abuttingly. In this way, the first liquid cooling circuit 10 and the second liquid cooling circuit 20 can adopt the same liquid inlet pipeline, and the cooling medium is transmitted through the liquid inlet pipeline and then is divided into the first liquid inlet 41 and the second liquid inlet 42, so as to reduce the layout of the pipeline and improve the space utilization of the battery pack 100. Of course, the first liquid inlet 41 and the second liquid inlet 42 can be connected with different liquid inlet pipelines respectively, so that the flow of the first liquid cooling circuit 10 and the second liquid cooling circuit 20 can be controlled separately.

[0064] The first liquid outlet 51 and the second liquid outlet 52 are arranged on the side of the second cover plate 12 away from the flow channel plate 13, and the first liquid outlet 51 and the second liquid outlet 52 are arranged abuttingly. In this way, the liquid cooling medium of the first liquid cooling circuit 10 and the second liquid cooling circuit 20 can be converged into the same liquid outlet pipeline and then flows out from the liquid outlet pipeline, so as to reduce the layout of the pipeline and improve the space utilization of the battery pack 100. Of course, the first liquid outlet 51 and the second liquid outlet 52 can be connected with different liquid outlet pipelines respectively, so that the liquid cooling medium of the first liquid cooling circuit 10 and the second liquid cooling circuit 20 can flow out from different liquid outlet pipelines.

[0065] Therefore, the first liquid cooling circuit 10 and the second liquid cooling circuit 20 can adopt the same liquid inlet pipeline and liquid outlet pipeline, so as to improve the cooling effect of the battery module 2 and the space utilization of the battery pack 100. The first liquid cooling circuit 10 and the second liquid cooling circuit 20 can adopt different liquid inlet pipelines and liquid outlet pipelines, so as to facilitate the separate control of the flow of each liquid cooling circuit.

[0066] Further, the first liquid inlet 41, the second liquid inlet 42, the first liquid outlet 51 and the second liquid outlet 52 are arranged abuttingly, so that the cooling medium near the first liquid inlet 41 has a lower temperature, the cooling medium near the first liquid outlet 51 has a higher temperature, the cooling medium near the second liquid inlet 42 has a lower temperature, and the cooling medium near the second liquid outlet 52 has a higher temperature. The design of the first liquid cooling circuit 10 and the second liquid cooling circuit 20 is in the form of high-low temperature close staggered distribution, which is conducive to the uniform temperature distribution of the whole liquid cooling plate 1. Moreover, the layout of the pipeline can be further reduced, and the space utilization of the battery pack 100 can be improved.

[0067] The above-mentioned "abuttingly arranged" can be understood as being arranged adjacently and spaced apart on one side of the liquid cooling plate 1. For example, the first liquid inlet 41 and the second liquid inlet 42 are arranged abuttingly, that is, the first liquid inlet 41 and the second liquid inlet 42 are located on the same side of the liquid cooling plate 1, and the two liquid inlets are arranged adjacently and spaced apart. The principle of the abutting arrangement of the two liquid outlets or the abutting arrangement of the liquid inlet and the liquid outlet is the same, which will not be described here.

[0068] As shown in Figure 4 The flow channel plate 13 is provided with first through holes 134 and second through holes 135. The first through holes 134 are in communication with the second liquid inlet 42 and the second liquid cooling circuit 20, and the second through holes 135 are in communication with the second liquid outlet 52 and the second liquid cooling circuit 20. In this way, the first liquid inlet 41 and the second liquid inlet 42 are located on the upper surface of the liquid cooling plate 1, and the first liquid outlet 51 and the second liquid outlet 52 are located on the lower surface of the liquid cooling plate 1, so as to further reduce the layout of the pipeline and improve the space utilization of the battery pack 100.

[0069] In other embodiments, the first through holes 134 are in communication with the first liquid inlet 41 and the first liquid cooling circuit 10, and the second through holes 135 are in communication with the first liquid outlet 51 and the first liquid cooling circuit 10. In this way, the layout of the pipeline can also be reduced, and the space utilization of the battery pack 100 can also be improved.

[0070] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0071] The liquid cooling plate and the battery pack provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the technical solutions of the present application and the core ideas thereof. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling plate, characterized in that, the liquid cooling plate has a first side and a second side opposite to each other, and a first liquid cooling circuit and a second liquid cooling circuit are formed in the liquid cooling plate, the first liquid cooling circuit is arranged close to the first side, and the second liquid cooling circuit is arranged close to the second side; the liquid cooling plate is provided with a first liquid inlet, a first liquid outlet, a second liquid inlet and a second liquid outlet, wherein the first liquid inlet and the first liquid outlet are in communication with the first liquid cooling circuit, and the second liquid inlet and the second liquid outlet are in communication with the second liquid cooling circuit. 2.The liquid cooling plate according to claim 1, characterized in that, the liquid cooling plate comprises a first cover plate, a second cover plate and a flow channel plate, the flow channel plate is arranged between the first cover plate and the second cover plate, a side surface of the flow channel plate facing the first cover plate is provided with a first groove, a side surface of the flow channel plate facing the second cover plate is provided with a second groove, the first groove and the first cover plate cooperatively form the first liquid cooling circuit, and the second groove and the second cover plate cooperatively form the second liquid cooling circuit. 3.The liquid cooling plate according to claim 1 or 2, characterized in that, a flow direction of a cooling medium in the first liquid cooling circuit is opposite to a flow direction of a cooling medium in the second liquid cooling circuit. 4.The liquid cooling plate according to claim 3, characterized in that, the first liquid cooling circuit comprises a plurality of first sub-flow channels extending in a first direction, two adjacent first sub-flow channels are in communication through a second sub-flow channel at the same end in the first direction, and flow directions of the cooling medium in the two adjacent first sub-flow channels are opposite; and / or the second liquid cooling circuit comprises a plurality of third sub-flow channels extending in the first direction, two adjacent third sub-flow channels are in communication through a fourth sub-flow channel at the same end in the first direction, and flow directions of the cooling medium in the two adjacent third sub-flow channels are opposite. 5.The liquid cooling plate according to claim 2, characterized in that, the first liquid inlet and the first liquid outlet are arranged on a side of the first cover plate away from the flow channel plate, and the first liquid inlet and the first liquid outlet are arranged in abutment; the second liquid inlet and the second liquid outlet are arranged on a side of the second cover plate away from the flow channel plate, and the second liquid inlet and the second liquid outlet are arranged in abutment. 6.The liquid cooling plate according to claim 2, characterized in that, the first liquid inlet and the second liquid inlet are arranged on a side of the first cover plate away from the flow channel plate, and the first liquid inlet and the second liquid inlet are arranged in abutment; the first liquid outlet and the second liquid outlet are arranged on a side of the second cover plate away from the flow channel plate, and the first liquid outlet and the second liquid outlet are arranged in abutment. 7.The liquid cooling plate according to claim 6, characterized in that, the flow channel plate is provided with a first through hole and a second through hole, the first through holes are in communication with the first liquid inlet, the first liquid cooling circuit, or the second through holes are in communication with the second liquid inlet, the second liquid cooling circuit. The second through holes are in communication with the first liquid outlet and the first liquid cooling circuit, or the second through holes are in communication with the second liquid outlet and the second liquid cooling circuit. 8.The liquid cooling plate according to claim 4 or 5, characterized in that, The first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet are arranged in abutment with each other.

9. A battery pack, characterized by, Comprise: At least two battery modules; And The liquid cooling plate according to any one of claims 1 to 8 is arranged between two adjacent battery modules. 10.The battery pack according to claim 9, characterized in that, The battery module comprises a plurality of battery cells, the battery cells comprise two first side walls, two second side walls and two end walls, the two first side walls are arranged opposite to each other in a first direction, the two second side walls are arranged opposite to each other in a third direction, and the two end walls are arranged opposite to each other in a second direction, and the liquid cooling plate is arranged between two adjacent second side walls.

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