Liquid cooling plate assembly, liquid cooling battery box and battery pack

Abstract

The utility model discloses a kind of liquid cooling plate assemblies, liquid cooling battery box and battery pack, it is related to energy storage technical field, liquid cooling plate assembly includes liquid cooling plate body, liquid cooling plate body includes opposite first side and second side, first side is equipped with the convex portion of the bulge towards second side, convex portion is formed with liquid storage groove, second side is equipped with the liquid passage hole being communicated with liquid storage groove, liquid cooling plate body is used to be communicated with external cooling system through liquid passage hole;Second side is also equipped with the flow channel portion of the bulge towards first side, flow channel portion is formed with multiple shunt grooves, and multiple shunt grooves are communicated with liquid storage groove respectively.This application cooperates through liquid storage groove and shunt groove, reduce the flow resistance of refrigerant in the liquid inlet and outlet site of liquid cooling plate body, increase the liquid flow of refrigerant, can improve the flow efficiency of refrigerant, to improve the heat dissipation efficiency of liquid cooling plate assembly.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a liquid-cooled plate assembly, a liquid-cooled battery box, and a battery pack. Background Technology

[0002] With the increasing energy density of batteries, heat dissipation performance has become a crucial factor affecting battery safety. Liquid cooling is currently the primary heat dissipation method for battery modules, and current battery packs integrate liquid cooling housings. These housings utilize liquid cooling plates for heat dissipation, which are connected to the external cooling system. However, current liquid cooling plates in related technologies experience significant flow resistance when the refrigerant is input from the external cooling system to the plate and output from it. This results in low refrigerant flow rates at the inlet and outlet points of the liquid cooling plate, affecting refrigerant flow efficiency and consequently leading to low heat dissipation efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a liquid cooling plate assembly to reduce the flow resistance of the refrigerant, increase the refrigerant flow rate, and improve the heat dissipation efficiency of the liquid cooling plate assembly.

[0004] This utility model also proposes a liquid-cooled battery box having the above-mentioned liquid-cooled plate assembly.

[0005] This utility model also proposes a battery pack having the above-mentioned liquid-cooled battery box.

[0006] According to a first aspect embodiment of the present invention, the liquid cooling plate assembly includes a liquid cooling plate body, the liquid cooling plate body including a first side and a second side facing away from each other, the first side having a protrusion protruding away from the second side, the protrusion forming a liquid storage tank, the second side having a liquid passage hole communicating with the liquid storage tank, the liquid cooling plate body being used to communicate with an external cooling system through the liquid passage hole; the second side also having a flow channel portion protruding away from the first side, the flow channel portion forming multiple diversion channels, the multiple diversion channels respectively communicating with the liquid storage tank.

[0007] The liquid-cooled plate assembly according to the first aspect of the present invention has at least the following beneficial effects: In the liquid-cooled plate assembly of this application, when the refrigerant is input into the liquid-cooled plate body from the external cooling system, the refrigerant first flows into the storage tank through the liquid passage, and then flows into the multi-path diversion channel through the storage tank. Compared with related technologies where the refrigerant flows directly into the heat exchange channel from the liquid inlet, the storage tank design increases the liquid inlet space, which can act as a buffer, reduce the refrigerant inlet resistance, and facilitate the inflow of large-volume refrigerant. Moreover, the multi-path diversion channel diverts the refrigerant flowing into the storage tank, allowing the refrigerant to flow along multiple paths, further reducing flow resistance and achieving large-volume diversion. When the refrigerant is output from the liquid-cooled plate body, the refrigerant first flows into the storage tank through the multi-path diversion channel, and then flows out of the liquid passage through the liquid passage. The multi-path diversion channel diverts the refrigerant to be output, preventing refrigerant accumulation during the liquid outlet process and reducing refrigerant outlet resistance. At the same time, the increased outlet space of the storage tank can act as a temporary storage, which can also reduce flow resistance and facilitate the outflow of large-volume refrigerant. Thus, by coordinating the aforementioned liquid storage tank and distribution tank, this application reduces the flow resistance of the refrigerant at the inlet and outlet of the liquid cooling plate body, increases the inlet and outlet flow rate of the refrigerant, improves the flow efficiency of the refrigerant, and thereby improves the heat dissipation efficiency of the liquid cooling plate assembly.

[0008] According to some embodiments of the present invention, the protrusion and the liquid passage hole are provided as two, the two protrusions are spaced apart and respectively form two liquid storage tanks, and the two liquid passage holes are connected to the two liquid storage tanks one-to-one; The multiple diversion channels are configured as two diversion groups, each diversion group including at least two diversion channels, and the diversion channels in each diversion group are connected to the same liquid storage tank and the same liquid passage hole.

[0009] According to some embodiments of the present invention, each of the diversion groups includes two diversion channels, and the liquid passage hole connected to each of the diversion groups is located between the two diversion channels.

[0010] According to some embodiments of the present invention, the liquid cooling plate assembly further includes a transfer pipe disposed on the second side, one end of the transfer pipe communicating with the liquid passage hole and the other end communicating with the external cooling system, wherein the second side is the lower side of the liquid cooling plate body.

[0011] According to some embodiments of the present invention, the liquid cooling plate body includes a first cover plate and a second cover plate stacked together. The first cover plate includes a first cover plate body, an overlapping portion and a connecting portion. The connecting portion is connected to the first cover plate body and extends in a direction away from the surface where the first cover plate body is located. The overlapping portion is connected to one end of the connecting portion away from the first cover plate body. The overlapping portion and the first cover plate body are located on opposite sides of the connecting portion. The second cover plate is connected to the first cover plate body.

[0012] According to some embodiments of the present invention, the second cover plate is disposed on the lower side of the first cover plate body, the first cover plate body is provided with the protrusion, the second cover plate is provided with the flow channel and the liquid passage hole, and the adapter pipe is connected to the second cover plate; Alternatively, the second cover plate is disposed on the upper side of the first cover plate body, the connecting portion extends out of the edge of the second cover plate, the second cover plate is provided with the protrusion, the first cover plate body is provided with the flow channel portion and the liquid passage hole, and the adapter pipe is connected to the first cover plate body.

[0013] According to some embodiments of the present invention, the adapter pipe includes a first pipe section and a second pipe section, the first pipe section being connected to the overlapping portion, and the second pipe section being connected to the first cover plate body or the second cover plate.

[0014] According to some embodiments of the present invention, the adapter pipe further includes a third pipe section, which is connected between the first pipe section and the second pipe section; wherein, the third pipe section is inclined relative to the thickness direction of the liquid cooling plate body, or the third pipe section is configured as an arc-shaped pipe.

[0015] According to some embodiments of the present invention, one end of the adapter tube connected to the liquid cooling plate body is provided with a protruding tube portion, the protruding tube portion is inserted into the liquid passage hole, and is sealed with the liquid passage hole. And / or, the adapter pipe is a stamped part.

[0016] According to a second aspect of the present invention, a liquid-cooled battery box includes a support frame and a liquid-cooled plate assembly as described in any of the above embodiments, wherein the liquid-cooled plate assembly is connected to the support frame.

[0017] A battery pack according to a third aspect of the present invention includes a battery module and a liquid-cooled battery box as described in any of the above embodiments, wherein the battery module is mounted on the liquid-cooled battery box.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a first-view structural schematic diagram of the liquid cooling plate assembly according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the first side of the liquid cooling plate body according to an embodiment of the present utility model; Figure 3This is a schematic diagram of the second side of the liquid cooling plate body according to an embodiment of the present invention; Figure 4 This is a cross-sectional view showing the connection between the liquid storage tank and the distribution tank of the liquid-cooled plate body in an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of the first cover plate of the liquid cooling plate body in an embodiment of the present utility model; Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the structure of the second cover plate of the liquid cooling plate body in an embodiment of the present utility model; Figure 8 for Figure 7 A magnified view of a section at point B in the middle; Figure 9 This is a second-view structural schematic diagram of the liquid cooling plate assembly according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the structure of the liquid-cooled battery box according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the support frame of the liquid-cooled battery box according to an embodiment of the present utility model; Figure 12 for Figure 10 A magnified view of a section at point C; Figure 13 This is a cross-sectional view of the connection between the adapter pipe, the liquid cooling plate body, and the side beam in an embodiment of this utility model. Figure 14 This is a schematic diagram of the transfer tube structure according to an embodiment of the present utility model.

[0020] Icon labels: 10. Liquid-cooled battery box; 100. Liquid-cooled plate assembly; 110. Liquid cooling plate body; 110a. First side; 110b. Second side; 111. First cover plate; 1111. First cover plate body; 1112. Overlapping edge; 1113. Connecting part; 1114. Protrusion; 1114a. First protrusion; 1114b. Second protrusion; 1115. Liquid storage tank; 1115a. First liquid storage tank; 1115b. Second liquid storage tank; 112. Second cover plate; 1121. Flow channel section; 1122. Diverter groove; 1122a. First diverter groove; 1122b. Second diverter groove; 1123. Liquid passage hole; 1123a. Liquid inlet hole; 1123b. Liquid outlet hole; 120. Adaptor pipe; 120a. Inlet pipe; 120b. Outlet pipe; 121. First pipe section; 122. Second pipe section; 1221. Protruding pipe section; 123. Third pipe section; 124. Connector; 200, support frame; 200a, accommodating space; 210, side beam; 211, notch groove; 300, module mounting beam. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] This application provides a liquid-cooled plate assembly and a liquid-cooled battery box using the liquid-cooled plate assembly. The liquid-cooled battery box is used in a battery pack, which includes battery modules, and the battery modules are mounted in the liquid-cooled battery box.

[0026] The liquid-cooled plate assembly 100 provided in this application includes a liquid-cooled plate body 110. Please refer to... Figures 1 to 3 The liquid cooling plate body 110 includes a first side 110a and a second side 110b that are opposite to each other along its thickness direction. The second side 110b is provided with a liquid passage hole 1123. The liquid cooling plate body 110 is used to communicate with an external cooling system through the liquid passage hole 1123. The external cooling system provides refrigerant and power to the liquid cooling plate body 110 to realize refrigerant circulation.

[0027] Understandably, to accommodate the different interfaces between the liquid cooling plate body 110 and the external cooling system, the liquid cooling plate assembly 100 may also include an adapter pipe 120. The adapter pipe 120 connects the liquid cooling plate body 110 to the external cooling system and is connected to the aforementioned liquid passage hole 1123. The adapter pipe 120 may include an inlet pipe 120a and an outlet pipe 120b, and the liquid passage hole 1123 may include an inlet hole 1123a and an outlet hole 1123b. The inlet pipe 120a is connected to the inlet hole 1123a, and the outlet pipe 120b is connected to the outlet hole 1123b. The refrigerant provided by the external cooling system enters the refrigerant channel of the liquid cooling plate body 110 through the inlet pipe 120a. During its flow through the refrigerant channel, the refrigerant can carry away the heat transferred by the battery cell assembly, and then flows back to the external cooling system through the outlet pipe 120b. This cycle repeats continuously, achieving liquid cooling of the battery cell assembly.

[0028] In related technologies, liquid cooling plates currently use a conventional inlet and outlet liquid structure. The refrigerant encounters significant flow resistance when flowing into the liquid cooling plate from the external cooling system and when flowing out of the liquid cooling plate. This results in a small flow rate of the refrigerant at the inlet and outlet, affecting the flow efficiency of the refrigerant and leading to low heat dissipation efficiency of the liquid cooling plate.

[0029] In this regard, please refer to the embodiments of this application. Figure 2 , Figure 3 And refer to Figure 4 The liquid cooling plate body 110 has a protrusion 1114 on its first side 110a, which protrudes away from the second side 110b. The protrusion 1114 forms a liquid storage tank 1115, which communicates with the liquid passage 1123. The liquid cooling plate body 110 also has a flow channel 1121 protruding away from the first side 110a. The flow channel 1121 forms a multi-channel diversion channel 1122, which communicates with the liquid storage tank 1115.

[0030] Understandably, when the refrigerant is input into the liquid cooling plate body 110 from the external cooling system, the refrigerant first flows into the liquid storage tank 1115 through the liquid inlet 1123 (liquid inlet 1123a), and then flows into the multi-channel diversion channel 1122 through the liquid storage tank 1115. Compared with the related technology where the refrigerant flows directly into the heat exchange channel from the liquid inlet, the liquid storage tank 1115 is designed with an increased liquid inlet space, which can play a buffering role, reduce the refrigerant inlet resistance, and facilitate the inflow of large flow of refrigerant. Moreover, the multi-channel diversion channel 1122 diverts the refrigerant flowing into the liquid storage tank 1115, so that the refrigerant flows along multiple paths, further reducing the flow resistance and realizing the diversion of large flow. Similarly, when the refrigerant is output from the liquid cooling plate body 110, the refrigerant first flows into the liquid storage tank 1115 through the multi-channel diversion channel 1122, and then flows out of the liquid outlet 1123 (liquid outlet 1123b) through the liquid storage tank 1115. The refrigerant to be output is first diverted through the multi-channel diversion channel 1122 to avoid the accumulation of refrigerant during the liquid output process and reduce the refrigerant liquid output resistance. At the same time, the liquid storage tank 1115 increases the liquid output space, which can play a temporary storage role, which can also reduce the flow resistance and facilitate the large flow of refrigerant.

[0031] Thus, through the coordinated operation of the aforementioned liquid storage tank 1115 and the diversion tank 1122, this application reduces the flow resistance of the refrigerant at the inlet and outlet of the liquid cooling plate body 110, increases the inlet and outlet flow rate of the refrigerant, and can improve the flow efficiency of the refrigerant, thereby improving the heat dissipation efficiency of the liquid cooling plate assembly 100.

[0032] The battery module includes a cell assembly and a battery cover. The cell assembly is generally supported on a liquid cooling plate body 110. In some embodiments of this application, to facilitate the support of the cell assembly, a first side 110a is the upper side of the liquid cooling plate body 110, and a second side 110b is the lower side of the liquid cooling plate body 110. The battery cover and the cell assembly are supported on the first side 110a of the liquid cooling plate body 110. It can be understood that since the flow channel portion 1121 is located on the second side 110b of the liquid cooling plate body 110, the first side 110a can be set very flat, which is conducive to the full contact between the cell assembly and the liquid cooling plate body 110, ensuring the heat dissipation effect of the cell assembly.

[0033] In some embodiments, two protrusions 1114 and two liquid passage holes 1123 are provided. The two protrusions 1114 are spaced apart and respectively form two liquid storage tanks 1115. The two liquid passage holes 1123 are connected to the two liquid storage tanks 1115 one-to-one. The multi-channel diversion channel 1122 is provided as two diversion groups. Each diversion group includes at least two diversion channels 1122. The diversion channels 1122 in each diversion group are connected to the same liquid passage hole 1123 through the same liquid storage tank 1115.

[0034] Combination Figure 2 And refer to Figure 5 and Figure 6The protrusion 1114 may include a first protrusion 1114a and a second protrusion 1114b, the first protrusion 1114a forming a first liquid storage tank 1115a, and the second protrusion 1114b forming a second liquid storage tank 1115b. (Refer to reference) Figure 7 and Figure 8 The two liquid passages 1123 are an inlet 1123a and an outlet 1123b, respectively. The first liquid storage tank 1115a is connected to the inlet 1123a, and the second liquid storage tank 1115b is connected to the outlet 1123b. The two flow dividers are used to divide the input and output of the refrigerant, respectively. The flow divider 1122 of one flow divider is connected to the inlet 1123a through the first liquid storage tank 1115a, and the flow divider 1122 of the other flow divider is connected to the outlet 1123b through the second liquid storage tank 1115b.

[0035] For ease of explanation, the diversion channel 1122 connected to the first liquid storage tank 1115a is defined as the first diversion channel 1122a, and the diversion channel 1122 connected to the second liquid storage tank 1115b is defined as the second diversion channel 1122b. Specifically, during the refrigerant circulation process, the refrigerant flows into the first liquid storage tank 1115a through the inlet hole 1123a, and flows to the main channel (not shown) of the liquid cooling plate body 110 through at least two first diversion channels 1122a. The refrigerant undergoes heat exchange in the main channel, and then flows from the main channel to the second diversion channel 1122b. It then merges into the second liquid storage tank 1115b through at least two second diversion channels 1122b, and flows out through the outlet hole 1123b.

[0036] In some embodiments, each diversion group includes two diversion channels 1122. The refrigerant flowing into the first storage tank 1115a through the inlet 1123a is divided into two streams by the diversion channels 1122 and merges into the main flow channel; correspondingly, the refrigerant flowing out of the main flow channel is divided into two streams by the diversion channels 1122 and merges into the second storage tank 1115b.

[0037] In some embodiments, such as Figure 8 As shown, when each diversion group includes two diversion channels 1122, the liquid passage hole 1123 connected to each diversion group is located between the two diversion channels 1122. It can be understood that in this embodiment, by placing the liquid passage hole 1123 between the two diversion channels 1122, the refrigerant flows directly into the liquid storage tank 1115 from the liquid passage hole 1123 and is then divided into two streams, rather than having the refrigerant first pass through one diversion channel 1122 before flowing to the other. This facilitates the uniform distribution of the refrigerant, ensuring that the flow rate of the refrigerant flowing into the two diversion channels 1122 is the same (or nearly the same).

[0038] Understandably, in order to distribute the refrigerant more evenly, in some embodiments, the distance between the liquid passage 1123 and any of the flow channels 1122 in each flow group is equal.

[0039] The battery module includes a cell assembly and a battery cover. When the battery module is installed in a liquid-cooled battery box, the cell assembly is supported on the liquid cooling plate body 110, and the battery cover is connected to the edge of the liquid cooling plate body 110, sealing the cell assembly within the enclosed space formed by the battery cover and the liquid cooling plate body 110. The sealing effect between the battery cover and the liquid cooling plate body 110 closely affects the waterproof performance of the battery pack.

[0040] In this embodiment, the first side 110a of the liquid cooling plate body 110 is used for a sealing connection with the battery cover. Please refer to... Figure 9 The adapter pipe 120 is disposed on the second side 110b of the liquid cooling plate body 110. One end of the adapter pipe 120 is connected to the liquid cooling plate body 110, and the other end is connected to the external cooling system. The second side 110b is the lower side of the liquid cooling plate body 110.

[0041] By connecting the adapter pipe 120 to the lower side (second side 110b) of the liquid cooling plate body 110, the connection structure of the battery cover on the upper side (first side 110a) of the liquid cooling plate body 110 is not affected by the adapter pipe 120. Compared with traditional liquid cooling plates with adapter pipes on the upper side, there is no need to set a conductive structure on the battery cover to lead the adapter pipe 120 out to the outside of the battery cover, and the sealing structure between the lead-out part of the adapter pipe 120 and the battery cover is eliminated, which greatly simplifies the structure and reduces the sealing difficulty between the battery cover and the liquid cooling plate body 110. Compared with the related technology of integrating the adapter pipe 120 into the liquid cooling box bracket, there is no need to integrate and seal the adapter pipe 120 on the liquid cooling box bracket, which also greatly simplifies the structure, reduces the sealing difficulty, and can reduce production costs.

[0042] Please refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of the liquid-cooled battery box 10 according to an embodiment of this application. The liquid-cooled battery box 10 includes a support frame 200. The support frame 200 is the main support body of the liquid-cooled battery box 10. The liquid cooling plate body 110 is supported and connected to the support frame 200. When the battery cell assembly is placed on the liquid cooling plate body 110, the weight of the liquid cooling plate body 110 and the battery cell assembly acts on the support frame 200. At the same time, the support frame 200 serves as a connecting component for the liquid-cooled battery box 10 (and the battery pack as a whole), so that the liquid-cooled battery box 10 or the battery pack as a whole can be hoisted or transported through the support frame 200.

[0043] Please refer to Figure 11The support frame 200 includes multiple side beams 210, which are sequentially connected to form a frame shape, and the multiple side beams 210 enclose a receiving space 200a. The liquid cooling plate body 110 is connected to the side beams 210, and part of the structure of the liquid cooling plate body 110 is located in the receiving space 200a. It should be noted that the arrangement of the liquid cooling plate body 110 "partially located in the receiving space 200a" includes not only the case where the liquid cooling plate body 110 extends entirely or partially into the receiving space 200a, but also the case where it does not extend into the receiving space, but is set on the upper surface of the side beams 210, but is still within the spatial range of the receiving space 200a extending in the height direction.

[0044] Since the adapter pipe 120 is located on the lower side of the liquid cooling plate body 110, when the liquid cooling plate body 110 is connected to the support frame 200, part of the structure of the adapter pipe 120 is located within the receiving space 200a. To enable the adapter pipe 120 to connect the external cooling system to the liquid cooling plate body 110, please refer to some embodiments of this application. Figure 11 and Figure 12 The side beam 210 is provided with a notch 211, and part of the structure of the transfer pipe 120 passes through the notch 211 to extend to the outside of the support frame 200 and connect with the external cooling system.

[0045] Since the side beam 210 needs to be provided with a notch 211, in order to ensure that the side beam 210 has sufficient strength, the side beam 210 can be designed to be taller. In one possible implementation, the liquid cooling plate body 110 can be set in a basin shape, so that the liquid cooling plate body 110 sinks to the lower part of the receiving space 200a, so as to increase the height of the side beam 210 without increasing the support height of the cell assembly (overall height of the battery pack).

[0046] Please combine Figure 1 , Figure 5 And refer to Figure 13The liquid cooling plate body 110 includes a first cover plate 111 and a second cover plate 112 stacked together. The first cover plate 111 includes a first cover plate body 1111, an overlapping portion 1112, and a connecting portion 1113. The connecting portion 1113 is connected to the edge of the first cover plate body 1111 and extends in a direction away from the surface of the first cover plate body 1111. The overlapping portion 1112 is connected to the end of the connecting portion 1113 away from the first cover plate body 1111. The overlapping portion 1112 and the first cover plate body 1111 are located on opposite sides of the connecting portion 1113. The second cover plate 112 is connected to the first cover plate body 1111. The overlapping portion 1112 is provided with the aforementioned first connecting surface 1112a, which is used to seal the connection between the overlapping portion 1112 and the battery cover. The overlapping portion 1112 may also be provided with a second connecting surface 1112b, which is opposite to the first connecting surface 1112a. The overlapping portion 1112 is connected to the edge beam 210 through the second connecting surface 1112b.

[0047] The second cover plate 112 can be connected to the upper side of the first cover plate body 1111 or to the lower side of the first cover plate body 1111.

[0048] Understandably, to ensure the sealing of the connection between the overlapping portion 1112 and the battery cover, the connecting portion 1113 is arranged around the edge of the first cover body 1111. Correspondingly, the overlapping portion 1112 is also arranged in a ring around the circumference of the connecting portion 1113, with the overlapping portion 1112 located outside the connecting portion 1113 and the first cover body 1111 located inside the connecting portion 1113. In this embodiment, through the above arrangement, the connecting portion 1113 and the main body of the first cover 111 form a basin-shaped groove that is recessed relative to the overlapping portion 1112, making the first cover 111 generally basin-shaped.

[0049] Therefore, in the above embodiment, the first cover plate 111 is set in a basin shape, so that the support surface of the liquid cooling plate body 110 used to support the battery cell assembly sinks. This allows the side beam 210 of the support frame 200 to be raised without increasing the support height of the battery cell assembly (i.e., the overall height of the support frame 200 is increased, but the relative height of the battery cell assembly after installation on the liquid cooling plate body 110 remains unchanged). Compared with the traditional liquid cooling box using a flat liquid cooling plate, the strength of the side beam 210 can be improved, thereby enhancing the overall load-bearing capacity and deformation resistance of the support frame 200. In particular, when the side beam 210 is provided with a notch 211, raising the side beam 210 based on the basin-shaped design of the liquid cooling plate body 110 can ensure that the side beam 210 has sufficient strength.

[0050] Please refer to Figure 13In one embodiment of this application, the second cover plate 112 is stacked and connected below the first cover plate body 1111. In this case, the first cover plate 111 serves as the upper cover plate of the liquid cooling plate body 110, and the second cover plate 112 serves as the lower cover plate of the liquid cooling plate body 110. The liquid cooling plate body 110 supports the cell assembly through the first cover plate body 1111. The first cover plate body 1111 is provided with the aforementioned protrusion 1114, and the second cover plate 112 is provided with the aforementioned flow channel portion 1121 and liquid passage hole 1123. The adapter pipe 120 is connected to the second cover plate 112.

[0051] In another possible embodiment of this application (not shown in the figures), the second cover plate 112 is stacked and connected above the first cover plate body 1111. In this case, the first cover plate 111 serves as the lower cover plate of the liquid cooling plate body 110, and the second cover plate 112 serves as the upper cover plate of the liquid cooling plate body 110. In this embodiment, the liquid cooling plate body 110 can support the cell assembly through the second cover plate 112. To connect the first connecting surface 1112a of the overlap portion 1112 to the battery cover, the connecting portion 1113 extends out from the edge of the second cover plate 112. The second cover plate 112 is provided with the aforementioned protrusion, the first cover plate body 1111 is provided with the aforementioned flow channel portion and liquid passage hole, and the adapter pipe 120 is connected to the first cover plate body 1111.

[0052] To better connect the adapter pipe 120 and the liquid cooling plate body 110, the adapter pipe 120 can be adapted to fit the basin-shaped liquid cooling plate body 110. In some embodiments, please refer to the reference. Figure 13 and Figure 14 The transfer pipe 120 includes a first pipe section 121, a second pipe section 122, and a third pipe section 123. The third pipe section 123 is connected between the first pipe section 121 and the second pipe section 122. The first pipe section 121 is connected to the overlap section 1112, and the second pipe section 122 is connected to the first cover plate body 1111 or the second cover plate 112. It is readily apparent that the above embodiments have indicated that the first cover plate 111 can serve as either the upper or lower cover plate of the liquid cooling plate. When the first cover plate 111 serves as the upper cover plate of the liquid cooling plate body 110, such as... Figure 8 As shown, the second tube 122 is connected to the second cover plate 112. When the first cover plate 111 serves as the lower cover plate of the liquid cooling plate body 110 (not shown in the figure), the second tube 122 is connected to the first cover plate body 1111.

[0053] The first pipe section 121 also extends beyond the edge of the overlapping section 1112 for connection with an external cooling system. Figure 14 As shown, a connector 124 may be provided at one end of the first tube 121 extending out of the overlap portion 1112, and the first tube 121 is connected to an external cooling system through the connector 124. It can be understood that the connector 124 and the first tube 121 can be an integrally formed structure, or the connector 124 and the first tube 121 can be separately connected.

[0054] Understandably, in this embodiment, by connecting the first tube portion 121 of the adapter pipe 120 to the overlapping portion 1112, when the liquid cooling plate body 110 is connected to the side beam 210, a notch 211 needs to be provided at the contact point between the side beam 210 and the overlapping portion 1112. The notch 211 is designed as an open notch, so that during the connection process between the liquid cooling plate assembly 100 and the carrier, the first tube portion 121 of the adapter pipe 120 can easily pass through the notch 211 and the liquid cooling plate assembly 100 can be directly overlapped and placed on the side beam 210. The assembly difficulty is small, which facilitates the assembly of the two and can improve production efficiency. Moreover, because of the above-mentioned arrangement, the liquid cooling plate assembly 100 can be directly placed on the side beam 210. In this way, the adapter pipe 120 and the liquid cooling plate body 110 can be pre-connected as a whole before assembly, and then the liquid cooling plate assembly 100 can be assembled with the support frame 200 in a complete component form. There is no need to install the adapter pipe 120 separately during the assembly process, which reduces the installation steps of the loose parts and further improves production efficiency.

[0055] In one embodiment of this application, the transfer pipe 120 is brazed to the overlap portion 1112, the first cover plate body 1111, or the second cover plate 112.

[0056] For some embodiments of this application, please refer to Figure 13 The third tube 123 is inclined relative to the thickness direction of the liquid cooling plate. By inclining the third tube 123 relative to the thickness direction of the liquid cooling plate (i.e., the vertical direction in the figure), that is, setting the third tube 123 as an inclined tube relative to the first tube 121 and the second tube 122, compared with the straight tube design, the third tube 123 can guide the refrigerant fluid to change its flow direction smoothly and gently along its tube wall, which can reduce the flow resistance of the refrigerant between the first tube 121 and the second tube 122, and correspondingly improve the flow efficiency of the refrigerant system. This allows the liquid cooling plate body 110 to remove the heat generated by the battery cell assembly in a timely manner through the refrigerant, thereby ensuring the liquid cooling heat dissipation effect of the liquid cooling plate body 110 on the battery cell assembly.

[0057] In another possible implementation, the third pipe section 123 can also be configured as an arc-shaped pipe. Similar to the above embodiment, by configuring the third pipe section 123 as an arc-shaped pipe, the flow resistance of the refrigerant can also be reduced; however, this will not be elaborated upon here.

[0058] In one embodiment, please refer again Figure 13 and Figure 14The end of the adapter pipe 120 connected to the liquid cooling plate body 110 is provided with a protruding tube portion 1221, which is inserted into the liquid passage hole 1123 and is sealed with the liquid passage hole 1123. The protruding tube portion 1221 protrudes from the second tube portion 122. The protruding tube portion 1221 and the liquid passage hole 1123 can be connected and sealed by brazing, thus the entire liquid cooling plate assembly 100 is formed by brazing. It is understood that the cross-sectional shape of the protruding tube portion 1221 can be set in various ways, including but not limited to circular, elliptical, and square shapes; this embodiment does not limit this.

[0059] The above embodiment provides a protruding tube portion 1221 at one end of the adapter tube 120. By inserting the protruding tube portion 1221 into the liquid passage hole 1123 of the liquid cooling plate body 110, the adapter tube 120 is positioned by the cooperation between the protruding tube portion 1221 and the liquid passage hole 1123. The adapter tube 120 can be quickly aligned with the liquid passage hole 1123 through the protruding tube portion 1221, which effectively ensures the alignment accuracy between the two and avoids misalignment. Moreover, the protruding tube portion 1221 is inserted into the liquid passage hole 1123, that is, part of the structure of the adapter is embedded in the liquid cooling plate body 110, which can enhance the connection strength between the adapter and the liquid cooling plate body 110 and prevent the adapter from easily detaching from the liquid cooling plate body 110 due to vibration or impact.

[0060] In one embodiment, the adapter pipe 120 is a stamped part. The adapter pipe 120 in this embodiment is manufactured by stamping, which reduces production costs compared to the traditional adapter pipes in related technologies that are machined.

[0061] This application also provides a battery pack, which includes a battery module and a liquid-cooled battery box 10 based on any of the above embodiments, wherein the battery module is mounted in the liquid-cooled battery box 10. Because the battery pack adopts all the technical solutions of the liquid-cooled battery box 10 of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0062] The battery module may include a cell assembly, which is supported on and in contact with the liquid cooling plate body 110. The cell assembly is positioned and fixed to the liquid cooling plate by a module mounting beam 300 to ensure effective contact between the cell assembly and the liquid cooling plate. The battery module may also include a battery cover, which is connected to the aforementioned overlapping portion 1112 of the liquid cooling plate body 110. The battery cover and the liquid cooling plate body 110 are closed to form a sealed space, in which the cell assembly is disposed.

[0063] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A liquid-cooled plate assembly, characterized in that, The device includes a liquid-cooled plate body, which comprises a first side and a second side facing away from each other. The first side has a protrusion that protrudes away from the second side and forms a liquid storage tank. The second side has a liquid passage hole communicating with the liquid storage tank. The liquid-cooled plate body is used to communicate with an external cooling system through the liquid passage hole. The second side also has a flow channel portion that protrudes away from the first side and forms a multi-channel diversion channel, which is respectively connected to the liquid storage tank.

2. The liquid-cooled plate assembly according to claim 1, characterized in that, The protrusion and the liquid passage hole are provided as two, the two protrusions are spaced apart and respectively form two liquid storage tanks, and the two liquid passage holes are connected to the two liquid storage tanks one-to-one; The multiple diversion channels are configured as two diversion groups, each diversion group including at least two diversion channels, and the diversion channels in each diversion group are connected to the same liquid storage tank and the same liquid passage hole.

3. The liquid-cooled plate assembly according to claim 2, characterized in that, Each of the flow dividers includes two flow dividers, and the liquid passage connecting each flow divider is located between the two flow dividers.

4. The liquid-cooled plate assembly according to any one of claims 1 to 3, characterized in that, The liquid cooling plate assembly also includes a transfer pipe disposed on the second side. One end of the transfer pipe is connected to the liquid passage hole, and the other end is connected to the external cooling system. The second side is the lower side of the liquid cooling plate body.

5. The liquid-cooled plate assembly according to claim 4, characterized in that, The liquid cooling plate body includes a first cover plate and a second cover plate stacked together. The first cover plate includes a first cover plate body, an overlapping portion, and a connecting portion. The connecting portion is connected to the first cover plate body and extends in a direction away from the surface where the first cover plate body is located. The overlapping portion is connected to the end of the connecting portion away from the first cover plate body. The overlapping portion and the first cover plate body are located on opposite sides of the connecting portion. The second cover plate is connected to the first cover plate body.

6. The liquid-cooled plate assembly according to claim 5, characterized in that, The second cover plate is disposed on the lower side of the first cover plate body. The first cover plate body is provided with the protrusion. The second cover plate is provided with the flow channel and the liquid passage hole. The adapter pipe is connected to the second cover plate. Alternatively, the second cover plate is disposed on the upper side of the first cover plate body, the connecting portion extends out of the edge of the second cover plate, the second cover plate is provided with the protrusion, the first cover plate body is provided with the flow channel portion and the liquid passage hole, and the adapter pipe is connected to the first cover plate body.

7. The liquid-cooled plate assembly according to claim 6, characterized in that, The transfer pipe includes a first pipe section and a second pipe section, the first pipe section being connected to the overlapping portion, and the second pipe section being connected to the first cover plate body or the second cover plate.

8. The liquid-cooled plate assembly according to claim 7, characterized in that, The transfer pipe further includes a third pipe section, which is connected between the first pipe section and the second pipe section; wherein the third pipe section is inclined relative to the thickness direction of the liquid cooling plate body, or the third pipe section is configured as an arc-shaped pipe.

9. The liquid-cooled plate assembly according to claim 5, characterized in that, The end of the adapter pipe that connects to the liquid cooling plate body is provided with a protruding tube portion, which is inserted into the liquid passage hole and is sealed to the liquid passage hole. And / or, the adapter pipe is a stamped part.

10. A liquid-cooled battery box, characterized in that, It includes a support frame and a liquid-cooled plate assembly as described in any one of claims 1 to 9, wherein the liquid-cooled plate assembly is connected to the support frame.

11. A battery pack, characterized in that, It includes a battery module and the liquid-cooled battery box as described in claim 10, wherein the battery module is mounted in the liquid-cooled battery box.

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