Heat dissipation assembly, battery module and electric vehicle

Abstract

The invention provides a heat dissipation assembly. The heat dissipation assembly comprises a main cold plate and a plurality of sub cold plates. A communicating liquid channel is formed in the main cooling plate, the main cooling plate is further provided with a liquid inlet and a liquid outlet which are communicated with the communicating liquid channel, the main cooling plate is provided with a plurality of butt-joint hole groups, the butt-joint hole groups are communicated with the communicating liquid channel, and each butt-joint hole group comprises a butt-joint inlet and a butt-joint outlet. Each sub-cold plate is provided with a sub-liquid channel, a connecting inlet and a connecting outlet, and each sub-cold plate is further provided with a connecting piece. In one sub cold plate, the connecting inlet and the connecting outlet are communicated with the sub liquid channel, and when the connecting piece is connected with the main cold plate, the butt-joint inlet in one butt-joint hole group is communicated with the connecting outlet, and the butt-joint outlet is communicated with the connecting inlet. The plurality of sub-cold plates are arranged at intervals in the first direction, and a containing groove for containing at least one battery pack is formed between every two adjacent sub-cold plates so as to cool the at least one battery pack located in the containing groove. The heat dissipation effect of the battery pack can be improved. The invention further provides a battery module and an electric vehicle.

Description

Technical Field

[0001] The present application relates to the field of cooling equipment, and in particular to a heat dissipation component, a battery module and an electric vehicle. Background Art

[0002] New energy is an important development direction of future energy. In the field of new energy, battery packs are key devices, so the heat dissipation technology of battery packs is very important. The battery pack has high energy density and poor thermal conductivity, which determines that it needs auxiliary heat dissipation technology. The existing liquid cooling only dissipates heat on the end face of the battery pack, and has a negative effect on the heat dissipation of the side of the battery pack. Summary of the invention

[0003] The present application provides a heat dissipation component, a battery module and an electric vehicle, which are convenient for improving the heat dissipation effect of a battery pack.

[0004] A first aspect of an embodiment of the present application provides a heat dissipation assembly, including a main cold plate and a plurality of sub-cold plates.

[0005] A connecting liquid channel is arranged inside the main cold plate, and the main cold plate is also provided with a liquid inlet and a liquid outlet connected to the connecting liquid channel. The main cold plate is provided with a plurality of docking hole groups, and the plurality of docking hole groups are connected to the connecting liquid channel, and each docking hole group includes a docking inlet and a docking outlet; each sub-cold plate is provided with a sub-liquid channel, a connecting inlet and a connecting outlet, and each sub-cold plate is also provided with a connecting piece; in a sub-cold plate, the connecting inlet and the connecting outlet are connected to the sub-liquid channel, and when the connecting piece is connected to the main cold plate, the docking inlet in a docking hole group is connected to the connecting outlet, and the docking outlet is connected to the connecting inlet; the plurality of sub-cold plates are arranged at intervals along a first direction, and a receiving groove for receiving at least one battery pack is formed between two adjacent sub-cold plates to cool the at least one battery pack located in the receiving groove.

[0006] This heat dissipation component can increase the contact area with the battery pack through the sub-cold plate, thereby improving the rapid heat dissipation of the battery pack and improving the safety of the battery module. The sub-cold plate and the main cold plate can be quickly assembled and easily disassembled during maintenance. In addition, the sub-cold plate can use the same specifications for different battery modules, and the main cold plate can be replaced to match different battery membrane groups.

[0007] Based on the first aspect, in some embodiments, the connecting liquid channel includes a first liquid channel, a second liquid channel and multiple sections of a third liquid channel; one end of the third liquid channel forms the docking outlet of one of the docking hole groups, and the other end forms the docking inlet of another of the docking hole groups; the connecting outlet of one of the sub-cold plates is connected with the connecting inlet of another of the sub-cold plates through a third liquid channel, so that the multiple sub-cold plates are connected in series; the liquid inlet is connected with the first sub-cold plate among the multiple sub-cold plates connected in series through the first liquid channel; the liquid outlet is connected with the last sub-cold plate among the multiple sub-cold plates connected in series through the second liquid channel.

[0008] In this heat dissipation component, multiple sub-cold plates are connected in series through the first liquid channel, the second liquid channel and multiple third liquid channels, so that the coolant in the heat dissipation component can pass through the multiple sub-cold plates in sequence. The coolant can flow through all the sub-cold plates, reducing the ineffective flow caused by the short circuit of the coolant.

[0009] Based on the first aspect, in some embodiments, the third liquid channel is S-shaped.

[0010] The third liquid channel in this heat dissipation component has a uniform shape, and one end can be connected to the middle of a sub-cold plate, and the other end can be connected to the end of the next sub-plate.

[0011] Based on the first aspect, in some embodiments, the second liquid channel has a bending section, which extends along a second direction to fill the area from the last sub-cold plate to the edge of the main cold plate, and the second direction is perpendicular to the first direction.

[0012] The bent section in this heat dissipation assembly can extend to the edge areas of the sub-cold plate and the main cold plate, so that the main cold plate can better cool the end of the battery pack.

[0013] Based on the first aspect, in some embodiments, the connecting liquid channel directly connects the liquid inlet and the liquid outlet; the connecting liquid channel includes a parallel inlet section and an outlet section; the inlet section is provided with a plurality of docking outlets, and the outlet section is provided with a plurality of docking outlets; the connecting inlet of any of the sub-cold plates is connected to the inlet section through one of the docking outlets, and the connecting outlet of any of the sub-cold plates is connected to the outlet section through one of the docking inlet, so that the multiple sub-cold plates are connected in parallel.

[0014] In this heat dissipation component, even if a sub-cold plate is not provided, the connecting liquid channel itself can connect the liquid inlet and the liquid outlet. Multiple sub-cold plates are connected to the inlet section and the outlet section, so that multiple sub-cold plates are connected in parallel. In this form, the coolant generates less heat accumulation, that is, after the coolant flows through a sub-cold plate, it enters the outlet section and is ready to flow out of the connecting liquid channel, and it is difficult to enter the next sub-cold plate to accumulate heat. This can reduce the phenomenon of heat accumulation in the sub-cold plate at the rear, and improve the cooling effect of the sub-cold plate at the rear.

[0015] Based on the first aspect, in some embodiments, the connecting liquid channel also includes a connecting section extending in a serpentine shape, and the inlet section and the outlet section are respectively connected at two ends of the connecting section; the flow cross-section of the connecting section is smaller than that of the inlet section, and / or the flow cross-section of the connecting section is smaller than that of the outlet section.

[0016] In this heat dissipation assembly, the flow cross section of the connecting section is small. Increasing the flow resistance of the connecting section can allow more coolant to pass through the sub-cold plate instead of flowing through the inlet section, the connecting section and the outlet section and out of the main cold plate without passing through the sub-cold plate.

[0017] Based on the first aspect, in some embodiments, the sub-cold plate is provided with extension pieces at the connection inlet and the connection outlet, the extension piece at the connection inlet is used to be inserted into the docking outlet along a third direction, and the extension piece at the connection outlet is used to be inserted into the docking inlet along the third direction; the extension piece includes at least two extension pieces arranged at intervals.

[0018] In this heat dissipation assembly, the sub-cold plate and the main cold plate can be pre-fixed by the extension piece, which is convenient for connecting and fixing the sub-cold plate and the main cold plate. The extension piece includes two extension pieces, which can facilitate positioning of the sub-cold plate and the main cold plate and improve connection accuracy.

[0019] Based on the first aspect, in some embodiments, the connecting member includes a connecting bolt, the main cold plate is provided with a connecting through hole, the sub-cold plate is provided with a connecting threaded hole, and the connecting bolt passes through the connecting through hole and is threadedly connected to the main cold plate to fix the sub-cold plate and the main cold plate.

[0020] In this heat dissipation assembly, the sub-cold plate and the main cold plate are fixed by connecting bolts, so that the sub-cold plate and the main cold plate are detachably connected, which is convenient for later maintenance.

[0021] A second aspect of the embodiment of the present application provides a battery module, which includes the above-mentioned heat dissipation assembly and a plurality of battery packs, wherein the plurality of battery packs are arranged at intervals along a first direction, and the receiving groove contains at least one of the plurality of battery packs.

[0022] The battery pack in this battery module can be cooled by multiple sub-cold plates, thereby improving the cooling effect of the battery pack and improving the safety of the battery module.

[0023] A third aspect of an embodiment of the present application provides an electric vehicle, comprising a vehicle body, a motor, a cold source and the above-mentioned battery module, wherein the battery module is electrically connected to the multiple battery packs in the battery module; the cold source is connected to the liquid inlet and the liquid outlet of the heat dissipation component to provide cooling liquid for the connecting liquid channel.

[0024] This electric vehicle supplies power to the motor through the battery module with high safety performance, thereby improving the safety of the electric vehicle and protecting personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the assembly of a battery module in one embodiment of the present application is shown.

[0026] Figure 2 A schematic diagram of the internal structure of a heat dissipation assembly according to an embodiment of the present application is shown.

[0027] Figure 3 A partial cross-sectional view of a heat dissipation assembly according to an embodiment of the present application is shown.

[0028] Figure 4 A schematic diagram of the internal structure of a heat dissipation assembly in one embodiment of the present application is shown from another perspective.

[0029] Figure 5 A schematic diagram of the internal structure of a main cold plate in a heat dissipation assembly according to an embodiment of the present application is shown.

[0030] Figure 6 A schematic diagram of the internal structure of a sub-cold plate of a heat dissipation assembly according to an embodiment of the present application is shown.

[0031] Figure 7 A cross-sectional view of a sub-cold plate of a heat dissipation assembly according to an embodiment of the present application is shown.

[0032] Figure 8 A schematic diagram of the internal structure of a heat dissipation assembly according to an embodiment of the present application is shown.

[0033] Fig. 9 A schematic diagram of the internal structure of a heat dissipation assembly in one embodiment of the present application is shown from another perspective.

[0034] Main component symbols

[0035] Battery module 001

[0036] Heat dissipation component 010

[0037] Battery Pack 030

[0038] Main cold plate 100

[0039] Connecting fluid channel 110

[0040] First liquid channel 111

[0041] Second liquid channel 113

[0042] Bending section 1131

[0043] The third liquid channel 115

[0044] Entrance section 117

[0045] Exit section 118

[0046] Connecting section 119

[0047] Liquid inlet 120

[0048] Liquid outlet 130

[0049] Docking hole group 140

[0050] Raised portion 150

[0051] Connecting through hole 170

[0052] Sub-cold plate 200

[0053] The first sub-cold plate 201

[0054] Intermediate sub-cold plate 202

[0055] The last sub-cold plate 203

[0056] Sub-liquid channel 210

[0057] Extension 250

[0058] Extension piece 251

[0059] Connector 300

[0060] Connecting bolt 310

[0061] First direction X

[0062] Second direction Y

[0063] The third direction Z

[0064] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0065] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0066] Hereinafter, if used, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more. Positional terms such as "upper", "lower", "left", and "right" are defined relative to the orientation of the components schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts. They are used for description and clarification relative to the components, and may change accordingly according to changes in the orientation of the components placed in the accompanying drawings.

[0067] In this application, if used, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integrated; can be directly connected or indirectly connected through an intermediate medium. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items.

[0068] When the following embodiments are described in detail in conjunction with schematic diagrams, for ease of explanation, the diagrams showing the local structures of the devices will not be partially enlarged according to the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of this application.

[0069] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0070] Figure 1 A schematic diagram of the assembly of a battery module 001 in one embodiment of the present application is shown. Figure 2 A schematic diagram of the internal structure of a heat dissipation assembly 010 according to an embodiment of the present application is shown. Figure 3A partial cross-sectional view of a heat dissipation assembly 010 according to an embodiment of the present application is shown. Figure 4 A schematic diagram of the internal structure of a heat dissipation assembly 010 according to an embodiment of the present application is shown from another perspective.

[0071] like Figure 1 As shown, this battery module 001 includes a heat dissipation component 010 and four battery packs 030. The four battery packs 030 are arranged at intervals along the first direction X. The heat dissipation component 010 includes a main cold plate 100 and three sub-cold plates 200. The three sub-cold plates 200 are arranged on one side of the main cold plate 100. The sub-cold plate 200 is inserted between two adjacent battery packs 030, and correspondingly, a battery pack 030 is also arranged between two adjacent sub-cold plates 200. Cooling liquid flows through the main cold plate 100 and the sub-cold plate 200 to dissipate heat from the battery pack 030.

[0072] It is understandable that the number of the sub-cold plates 200 can be other, and the arrangement of the sub-cold plates 200 can also be set to be that some sub-cold plates 200 are located on one side of the main cold plate 100, and other sub-cold plates 200 are located on the other side of the main cold plate 100.

[0073] like Figure 2 and Figure 3 As shown, the main cold plate 100 in the heat dissipation assembly 010 is provided with a connecting liquid channel 110, and the sub-cold plate 200 is provided with a sub-liquid channel 210. The connecting liquid channel 110 is connected with each sub-liquid channel 210, so that after the coolant enters the connecting liquid channel 110, it can enter each sub-liquid channel 210 through the connecting liquid channel 110, and then take away the heat through the sub-cold plate 200 that contacts the battery pack 030 with a large area. A cooling medium, such as heat dissipation silicone grease, can also be filled between the battery pack 030 and the sub-cold plate 200.

[0074] The main cold plate 100 is provided with a liquid inlet 120 and a liquid outlet 130 connected to the connecting liquid channel 110. The main cold plate 100 is provided with a plurality of docking hole groups 140, and the plurality of docking hole groups 140 are connected to the connecting liquid channel 110. Each docking hole group 140 includes a docking inlet and a docking outlet. Each sub-cold plate 200 is provided with a connection inlet and a connection outlet. In a sub-cold plate 200, the connection inlet and the connection outlet are connected to the sub-liquid channel 210. When the connector 300 is connected to the main cold plate 100, the docking inlet in a docking hole group 140 is connected to the connection outlet, and the docking outlet is connected to the connection inlet.

[0075] The liquid inlet 120 and the liquid outlet 130 are connected to the cold source. The coolant of the cold source enters the connecting liquid channel 110 through the liquid inlet 120, and the coolant flows back to the cold source through the liquid outlet 130 for cooling. In the heat dissipation assembly 010, the connecting liquid channel 110 of the main cold plate 100 transports the coolant to the sub-liquid channel 210 through the docking outlet and the connecting inlet. When the coolant flows through the sub-liquid channel 210, it absorbs the heat absorbed by the sub-cold plate 200 from the battery pack 030. The coolant then flows back to the connecting liquid channel 110 through the connecting outlet and the docking inlet.

[0076] like Figure 2 As shown, in this heat dissipation component 010, each sub-cold plate 200 is arranged in series. The connecting liquid channel 110 includes a first liquid channel 111, a second liquid channel 113 and two sections of a third liquid channel 115. One end of the third liquid channel 115 forms a docking outlet of a docking hole group 140, and the other end forms a docking inlet of another docking hole group 140. The connection outlet of one sub-cold plate 200 is connected to the connection inlet of another sub-cold plate 200 through a third liquid channel 115, so that the three sub-cold plates 200 are connected in series. The liquid inlet 120 is connected to the first sub-cold plate 201 of the three sub-cold plates 200 connected in series through the first liquid channel 111. The liquid outlet 130 is connected to the last sub-cold plate 203 of the multiple sub-cold plates 200 connected in series through the second liquid channel 113.

[0077] by Figure 2 Based on the orientation shown, the sub-cold plate 200 located on the far left is the first sub-cold plate 201, the sub-cold plate 200 located on the far right is the last sub-cold plate 203, and the sub-cold plate 200 located in the middle is the middle sub-cold plate 202. One section of the third flow channel connects the first sub-cold plate 201 and the middle sub-cold plate 202, and another section of the third flow channel connects the middle sub-cold plate 202 and the last sub-cold plate 203. Specifically, the connection inlet of the sub-cold plate 200 is arranged at the end located in the second direction Y, and the connection outlet of the sub-cold plate 200 is arranged in the middle position. The third liquid channel 115 is S-shaped. One end of the first liquid channel 111 is connected to the liquid inlet 120, and the other end is connected to the connection inlet of the first sub-cold plate 201. One end of a section of the third liquid channel 115 is connected to the connection outlet of the first sub-cold plate 201, and the other end is connected to the connection inlet of the middle sub-cold plate 202. One end of the other third liquid channel 115 is connected to the connection outlet of the middle sub-cold plate 202, and the other end is connected to the connection inlet of the last sub-cold plate 203. The second direction Y is perpendicular to the first direction X and parallel to the plane where the main cold plate 100 is located. One end of the second liquid channel 113 is connected to the connection outlet of the last sub-cold plate 203, and the other end is connected to the liquid outlet 130.

[0078] In the heat dissipation assembly 010, the coolant flows along the following path: the liquid inlet 120, the first section, the sub-liquid channel 210 of the first sub-cold plate 201, the third liquid channel 115, the sub-liquid channel 210 of the middle sub-cold plate 202, the third liquid channel 115, the sub-liquid channel 210 of the last sub-cold plate 203, and the second liquid channel 113. The coolant can pass through the three sub-cold plates 200 in sequence.

[0079] See also Figure 2 and Figure 4 , the second liquid channel 113 has a bending section 1131, and the bending section 1131 extends along the second direction Y to fill the area from the last sub-cold plate 203 to the edge of the main cold plate 100, and the second direction Y is perpendicular to the first direction X. The end of the last battery pack 030 along the third direction Z contacts the area where the bending section 1131 is located, and the cooling effect of the end of the battery pack 030 along the third direction Z can be improved by circulating the coolant through the bending section 1131. It can be understood that one side of the last battery pack 030 contacts the last sub-cold plate 203, and the other side does not contact any sub-cold plate 200. The side of the last battery pack 030 that is not contacted by the sub-cold plate 200 can be cooled by air cooling. A sub-cold plate 200 can also be added to the heat dissipation assembly 010, so that both sides of the last battery pack 030 contact the sub-cold plate 200, and liquid cooling is performed through the two sub-cold plates 200.

[0080] Figure 5 A schematic diagram of the internal structure of a main cold plate 100 in a heat dissipation assembly 010 according to an embodiment of the present application is shown. Figure 6 A schematic diagram of the internal structure of a sub-cold plate 200 of a heat dissipation assembly 010 according to an embodiment of the present application is shown. Figure 7 A cross-sectional view of a sub-cold plate 200 of a heat dissipation assembly 010 according to an embodiment of the present application is shown.

[0081] like Figure 5 and Figure 6As shown, a protrusion 150 is provided at the position where the docking hole group 140 is provided on the main cold plate 100. The protrusion 150 is in a strip shape, and the protrusion 150 is provided corresponding to the sub-cold plate 200. The connector 300 includes a connecting bolt 310. The main cold plate 100 is provided with a connecting through hole 170. The sub-cold plate 200 is provided with a connecting threaded hole. After the connecting bolt 310 passes through the connecting through hole 170, it is threadedly matched with the connecting threaded hole, and the relative position of the sub-cold plate 200 and the main cold plate 100 is fixed by the connecting bolt 310. The protrusion 150 allows the connecting through hole 170 to be provided as a countersunk hole, so that the bolt head of the connecting bolt 310 sinks therein, protecting the bolt head of the connecting bolt 310, and to a certain extent, it can also reduce the risk of the connecting bolt 310 accidentally being rotated by external force, resulting in an unstable connection between the sub-cold plate 200 and the main cold plate 100. It can be understood that the connecting member 300 can also include an anti-loosening gasket, which is arranged on the bolt head of the connecting bolt 310 and the bottom wall of the countersunk hole, further reducing the risk of the connecting bolt 310 accidentally rotating due to external force, resulting in an unstable connection between the sub-cold plate 200 and the main cold plate 100.

[0082] See also Figure 6 and Figure 7 , the sub-liquid channel 210 in the sub-cold plate 200 is arranged in a serpentine shape, so that the sub-liquid channel 210 can cover a larger area of ​​the sub-cold plate 200, and the coolant can also stay in the sub-liquid channel 210 of the sub-cold plate 200 for a longer time, so that the cooling effect of the coolant is improved. The three connecting through holes 170 on the main cold plate 100 are arranged at intervals along the second direction Y, and correspondingly, the three connecting bolts 310 are arranged at intervals along the second direction Y. Two installation areas are formed between the three connecting through holes 170, and the two installation areas are separated by the connecting through hole 170 located in the middle. The connection inlet is located in one of the installation areas, and the connection outlet is located in the other installation area. Connecting bolts 310 are provided on both sides of the connection inlet and the connection outlet, so that the connection stability of the connection inlet and the docking outlet, as well as the connection stability of the connection outlet and the docking inlet are improved.

[0083] It is understandable that the main cold plate 100 can be manufactured in a one-step molding form, or two plates with grooves can be produced first. After the two plates with grooves are assembled along the third direction Z, a connecting fluid channel 110 is formed between the two plates with grooves through the grooves, and then the two plates with grooves are fixedly connected by welding or other means to ensure the sealing of the main cold plate 100.

[0084] It is understandable that the sub-cold plate 200 can be manufactured in a one-step molding form, or two plates with grooves can be produced first. After the two plates with grooves are assembled along the first direction X, the sub-liquid channel 210 is formed between the two plates with grooves through the grooves, and then the two plates with grooves are fixedly connected by welding or the like to ensure the sealing of the sub-cold plate 200.

[0085] See also Figure 1 and Figure 7 The sub-cold plate 200 is provided with an extension piece 250 at the connection inlet and the connection outlet. The extension piece 250 at the connection inlet is used to be inserted into the docking outlet along the third direction Z, and the extension piece 250 at the connection outlet is used to be inserted into the docking inlet along the third direction Z. The extension piece 250 includes at least two extension pieces 251 arranged at intervals.

[0086] The extension piece 250 can be used to pre-fix the sub-cold plate 200 and the main cold plate 100, which is convenient for connecting and fixing the sub-cold plate 200 and the main cold plate 100. The extension piece 250 includes two extension pieces 251, which can facilitate positioning of the sub-cold plate 200 and the main cold plate 100 and improve connection accuracy.

[0087] Figure 8 A schematic diagram of the internal structure of a heat dissipation assembly 010 according to another embodiment of the present application is shown. Fig. 9 A schematic diagram of the internal structure of a heat dissipation assembly 010 from another perspective according to another embodiment of the present application is shown.

[0088] like Figure 8 As shown, in this heat dissipation assembly 010, each sub-cold plate 200 is arranged in parallel. The connecting liquid channel 110 includes a parallel inlet section 117 and an outlet section 118. Three docking outlets are provided on the inlet section 117, and three docking outlets are provided on the outlet section 118. Each docking inlet and a docking outlet correspond to each other along the second direction Y, forming a docking hole group 140. The connection inlet of any sub-cold plate 200 is connected to the inlet section 117 through a docking outlet, and the connection outlet of any sub-cold plate 200 is connected to the outlet section 118 through a docking inlet, so that the three sub-cold plates 200 are connected in parallel through the main cold plate 100.

[0089] by Figure 8The sub-cold plate 200 located on the far left is the first sub-cold plate 201, the sub-cold plate 200 located on the far right is the last sub-cold plate 203, and the sub-cold plate 200 located in the middle is the middle sub-cold plate 202. The first sub-cold plate 201, the middle sub-cold plate 202 and the last sub-cold plate 203 are arranged in parallel, and one end located in the second direction Y is connected to the inlet section 117, and the other end is connected to the outlet section 118. Specifically, the coolant enters the inlet section 117 of the connecting liquid channel 110 through the liquid inlet 120, and when flowing through the docking outlet corresponding to the first sub-cold plate 201, part of the coolant can enter the first sub-cold plate 201 through the docking outlet and the connecting inlet. After the part of the coolant circulates in the sub-liquid channel 210 of the first sub-cold plate 201, it flows into the outlet section 118 through the connecting outlet of the first sub-cold plate 201, and flows out of the connecting liquid channel 110 through the outlet 130 through the outlet section 118. The coolant that has not entered the sub-liquid channel 210 of the first sub-cold plate 201 from the inlet section 117 continues to flow through the inlet section 117, wherein part of the coolant can enter the middle sub-cold plate 202 through the docking outlet and the connecting inlet, and after flowing in the sub-liquid channel 210 of the middle sub-cold plate 202, the part of the coolant flows into the outlet section 118 through the connecting outlet of the middle sub-cold plate 202, and flows out of the connecting liquid channel 110 through the outlet 130 through the outlet section 118. The coolant that has not entered the sub-liquid channel 210 of the middle sub-cold plate 202 from the inlet section 117 continues to flow through the inlet section 117, wherein at least part of the coolant can enter the last sub-cold plate 203 through the docking outlet and the connecting inlet, and after flowing in the sub-liquid channel 210 of the last sub-cold plate 203, the at least part of the coolant flows into the outlet section 118 through the connecting outlet of the last sub-cold plate 203, and flows out of the connecting liquid channel 110 through the outlet 130 through the outlet section 118.

[0090] It is understandable that the inlet section 117 and the outlet section 118 may not be directly connected, but only connected through the sub-liquid channels 210 of the three sub-cold plates 200 , so that the coolant will pass through the sub-liquid channels 210 of the three sub-cold plates 200 .

[0091] like Figure 8As shown, the connecting liquid channel 110 also includes a connecting section 119, and the inlet section 117 and the outlet section 118 are respectively connected to the two ends of the connecting section 119. The connecting section 119 extends in a serpentine shape. The coolant that does not flow through the three sub-cold plates 200 can enter the outlet section 118 from the inlet section 117 via the connecting section 119. In this way, on the one hand, it can avoid the failure of the sub-cold plate 200 causing the circulation problem of the entire heat dissipation component 010, and on the other hand, the flow rate flowing through each sub-liquid channel 210 can be adjusted by adjusting the specific parameters of the connecting section 119. Specifically, the flow cross-section of the connecting section 119 is smaller than the inlet section 117 and the outlet section 118. When the coolant enters the connecting section 119 from the inlet section 117, there is a large resistance, and the coolant in the driving inlet section 117 tends to enter the outlet section 118 through the sub-liquid channel 210. By adjusting the specific extension shape and flow cross-section of the connecting section 119, the distribution of the coolant between the connecting liquid channel 110 and the sub-liquid channel 210 can be adjusted. It can be understood that the flow cross-section of the connecting section 119 is only smaller than one between the inlet section 117 and the outlet section 118, and the coolant can be restricted from directly entering the outlet section 118 from the inlet section 117 via the connecting section 119, thereby improving the coolant flow rate in the sub-liquid channel 210.

[0092] like Figure 8 and Fig. 9 As shown, the connecting section 119 also extends along the second direction Y to fill the area from the last sub-cold plate 203 to the edge of the main cold plate 100. The cooling effect of the end of the battery pack 030 corresponding to the area along the third direction Z can be improved by circulating the coolant through the connecting section 119.

[0093] The heat dissipation assembly 010 provided in the present application can increase the contact area with the battery pack 030 through the sub-cold plate 200, thereby improving the rapid heat dissipation of the battery pack 030 and improving the safety of the battery module 001. The sub-cold plate 200 and the main cold plate 100 can be quickly assembled and easily disassembled during maintenance. In addition, in response to different battery modules 001, the sub-cold plate 200 can use a uniform specification, and the main cold plate 100 can be replaced to match different battery membrane groups.

[0094] The present application also provides an electric vehicle (not shown in the figure). The electric vehicle includes a vehicle body, a motor, a cold source, and the above-mentioned battery module 001, wherein the battery module 001 is electrically connected to a plurality of battery packs 030 in the battery module 001. The cold source is connected to the liquid inlet 120 and the liquid outlet 130 of the heat dissipation component 010 to provide cooling liquid to the connecting liquid channel 110.

[0095] This electric vehicle can be a two-wheel electric vehicle, a three-wheel electric vehicle or a four-wheel electric vehicle. Especially when the electric vehicle is a two-wheel electric vehicle, the limited space of the two-wheel electric vehicle can be used to provide an excellent cooling effect for the battery pack 030, thereby improving the safety of the electric vehicle.

[0096] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the disclosure scope of the present application.

Claims

1. A heat dissipation component, characterized in that: include: A main cold plate, wherein a connecting liquid channel is provided inside, the main cold plate is further provided with a liquid inlet and a liquid outlet connected to the connecting liquid channel, the main cold plate is provided with a plurality of docking hole groups, the plurality of docking hole groups are connected to the connecting liquid channel, and each of the docking hole groups includes a docking inlet and a docking outlet; A plurality of sub-cold plates, each of which is provided with a sub-liquid channel, a connection inlet and a connection outlet, and each of which is also provided with a connector; In one of the sub-cold plates, the connection inlet and the connection outlet are in communication with the sub-liquid channel, and when the connector is connected to the main cold plate, the docking inlet in one of the docking hole groups is in communication with the connection outlet, and the docking outlet is in communication with the connection inlet; A plurality of the sub-cold plates are arranged at intervals along a first direction, and a receiving groove for receiving at least one battery pack is formed between two adjacent sub-cold plates to cool the at least one battery pack located in the receiving groove.

2. The heat dissipation assembly according to claim 1, characterized in that: The communicating fluid channel comprises a first fluid channel, a second fluid channel and a plurality of sections of a third fluid channel; One end of the third liquid channel forms the docking outlet of one docking hole group, and the other end forms the docking inlet of another docking hole group; The connection outlet of one of the sub-cold plates is connected to the connection inlet of another of the sub-cold plates through one of the third fluid passages, so that the multiple sub-cold plates are connected in series; The liquid inlet is connected to the first sub-cold plate of the plurality of sub-cold plates connected in series through the first liquid channel; The liquid outlet is communicated with the last sub-cold plate among the plurality of sub-cold plates connected in series through the second liquid channel.

3. The heat dissipation assembly according to claim 2, characterized in that: The third liquid channel is S-shaped.

4. The heat dissipation assembly according to claim 2, characterized in that: The second liquid channel has a bent section, and the bent section extends along a second direction to fill the area from the last sub-cold plate to the edge of the main cold plate, and the second direction is perpendicular to the first direction.

5. The heat dissipation assembly according to claim 1, wherein: The communicating fluid passage comprises an inlet section and an outlet section arranged in parallel; The inlet section is provided with a plurality of docking outlets, and the outlet section is provided with a plurality of docking outlets; The connection inlet of any one of the sub-cold plates is communicated with the inlet section through one of the docking outlets, and the connection outlet of any one of the sub-cold plates is communicated with the outlet section through one of the docking inlet, so that the multiple sub-cold plates are connected in parallel.

6. The heat dissipation assembly according to claim 5, characterized in that: The communication fluid channel further comprises a connecting section extending in a serpentine shape, and the inlet section and the outlet section are respectively connected to two ends of the connecting section; The flow cross section of the connecting section is smaller than that of the inlet section, and / or the flow cross section of the connecting section is smaller than that of the outlet section.

7. The heat dissipation assembly according to claim 2 or 5, characterized in that: The sub-cold plate is provided with extension pieces at the connection inlet and the connection outlet, the extension piece at the connection inlet is used to be inserted into the docking outlet along the third direction, and the extension piece at the connection outlet is used to be inserted into the docking inlet along the third direction; The extension piece includes at least two extension pieces which are spaced apart from each other.

8. The heat dissipation assembly according to claim 2 or 5, characterized in that: The connecting member includes a connecting bolt, the main cold plate is provided with a connecting through hole, the sub-cold plate is provided with a connecting threaded hole, and the connecting bolt passes through the connecting through hole and is threadedly connected to the main cold plate to fix the sub-cold plate and the main cold plate.

9. A battery module, characterized in that: A heat dissipation assembly comprising the heat dissipation assembly according to any one of claims 1 to 8 and a plurality of battery packs, wherein the plurality of battery packs are arranged at intervals along a first direction; At least one of the plurality of battery packs is accommodated in the accommodating groove.

10. An electric vehicle, characterized in that: comprising a vehicle body, a motor, a cold source and a battery module as claimed in claim 1, wherein the battery module is electrically connected to the plurality of battery packs in the battery module; The cold source is communicated with the liquid inlet and the liquid outlet of the heat dissipation component to provide cooling liquid for the communication liquid channel.

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