HEAT RADIATOR ASSEMBLY, BATTERY PACK, AND VEHICLE

Abstract

A battery pack is provided in a vehicle. The battery pack includes a heat sink assembly. The heat sink assembly includes a first heat sink, a second heat sink, a third heat sink, and at least one fourth heat sink. The third heat sink is connected between the first heat sink and the second heat sink. The third heat sink is in separate communication with the first heat sink and the second heat sink, at least one fourth heat sink is connected between the first heat sink and the second heat sink, the fourth heat sink is in separate communication with the first heat sink and the second heat sink, the at least one fourth heat sink and the third heat sink are arranged side by side between the first heat sink and the second heat sink, both the first heat sink and the second heat sink are stamping plate type heat sinks, and the fourth heat sink is a harmonica shaped tube heat sink.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to and the benefit of Chinese Patent Application No. 202221059926.4, entitled "HEAT RADIATOR ASSEMBLY, BATTERY PACK, AND VEHICLE," filed by BYD Co., Ltd. on April 29, 2022. The entire contents of the above-referenced application are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of batteries, and in particular to a heat sink assembly, a battery pack, and a vehicle. [Background technology]

[0003] In the related art, some batteries dissipate heat through a radiator made of stamped brazed plate. The radiator made of stamped brazed plate not only has a relatively large overall weight and high cost, which does not contribute to improving the energy density of the entire pack, but also has a complicated internal flow path design and a relatively long flow path, which causes a relatively large loss. As a result, a relatively large temperature difference is generated between various parts of the battery, which does not contribute to balanced cooling of the battery. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to solve at least one of the technical problems existing in the related art. In view of this, the present disclosure provides a heat sink assembly, which has good heat dissipation performance and is light in weight. [Means for solving the problem]

[0005] The present disclosure further provides a battery pack.

[0006] The present disclosure further provides a vehicle.

[0007] The heat sink assembly according to the present disclosure includes a first heat sink, a second heat sink, where the second heat sink and the first heat sink are disposed opposite to each other, a third heat sink, where the third heat sink is connected between the first heat sink and the second heat sink, where the third heat sink is in separate communication with the first heat sink and the second heat sink, where a joint is disposed on the third heat sink, where a main heat dissipation area is formed by being surrounded by the third heat sink, the second heat sink, and the first heat sink, and at least one fourth heat sink. and at least one fourth heat sink located within the main heat dissipation area, the at least one fourth heat sink connected between the first heat sink and the second heat sink, the fourth heat sink individually communicating with the first heat sink and the second heat sink, the at least one fourth heat sink and the third heat sink disposed side by side between the first heat sink and the second heat sink, the first heat sink and the second heat sink both being stamping plate type heat sinks, and the fourth heat sink being a harmonica shaped tube heat sink.

[0008] Therefore, by disposing at least one fourth heat sink between the first heat sink and the second heat sink, configuring both the first heat sink and the second heat sink as stamped plate type heat sinks, and configuring the fourth heat sink as a harmonica-shaped tube heat sink, only a part of the structure in the heat sink assembly is a stamped plate type heat sink, so that the weight of the heat sink assembly can be reduced compared with the heat sink assembly of the related art in which the entire structure is all stamped plate type heat sinks. In addition, the relatively simple flow path design in the harmonica-shaped tube heat sink helps to optimize the heat dissipation performance of the heat sink assembly.

[0009] In one embodiment, at least one open fixing groove is disposed on the side of each of the first and second heat sinks facing the fourth heat sink (40), and an end of the fourth heat sink is fixed in the corresponding fixing groove.

[0010] In one embodiment, the first heat sink and the second heat sink include a first upper plate and a first lower plate, respectively. The first lower plate is fixed under the first upper plate. A flow path and a fixing groove are formed in the first lower plate by stamping. The fixing groove is in communication with the flow path, and the flow path is in communication with the fourth heat sink through the fixing groove.

[0011] In one embodiment, the width of the fixing groove is the same as the width of the corresponding fourth heat sink, and the end of the fourth heat sink is welded into the corresponding fixing groove.

[0012] In one embodiment, the depth of the fixing groove is equal to the height of the corresponding fourth heat sink.

[0013] In one embodiment, a first mating surface is disposed on both sides of an end of the fourth heat sink, a second mating surface is disposed on both sides of a fixing groove corresponding to the fourth heat sink, and the first mating surface coincides with the second mating surface.

[0014] In one embodiment, each of the first mating surface and the second mating surface is either a curved surface, an arcuate surface, or an inclined plane.

[0015] In one embodiment, a plurality of fourth heat sinks are disposed, and the plurality of fourth heat sinks are spaced apart within the main heat dissipation area.

[0016] In one embodiment, a first main flow path and a second main flow path are disposed in the first heat radiator, the first main flow path and the second main flow path being spaced apart in the length direction of the first heat radiator, and a third main flow path and a fourth main flow path are disposed in the second heat radiator, the third main flow path and the fourth main flow path being spaced apart in the width direction of the second heat radiator. The fourth heat radiators include a first portion, a second portion, and a third portion, the first main flow path communicates with the third main flow path through the first portion of the fourth heat radiators, the first main flow path communicates with the fourth main flow path through the second portion of the fourth heat radiators, and the fourth main flow path communicates with the second main flow path through the third portion of the fourth heat radiators.

[0017] In one embodiment, at least two first branch flow paths are arranged in the first heat radiator, the at least two first branch flow paths including a first sub-flow path and a second sub-flow path, the first main flow path is in communication with a first portion of the plurality of fourth heat radiators via the first sub-flow path, the first main flow path is in communication with a second portion of the plurality of fourth heat radiators via the second sub-flow path, and / or at least two second branch flow paths are arranged in the first heat radiator, a third portion of the plurality of fourth heat radiators is in communication with the second main flow path via a portion of the at least two second branch flow paths, and the second main flow path is in communication with the third heat radiator via another portion of the at least two second branch flow paths.

[0018] In one embodiment, at least two fourth branch flow paths are disposed in the second heat radiator, the at least two fourth branch flow paths including a first channel and a second channel, a second portion of the plurality of fourth radiators communicating with the fourth main flow path via the first channel, and the fourth main flow path communicating with a third portion of the plurality of fourth radiators via the second channel; and / or at least two third branch flow paths are disposed in the second heat radiator, a first portion of the plurality of fourth radiators communicating with the third main flow path via a portion of the at least two third branch flow paths, and the third main flow path communicating with the third radiator via another portion of the at least two third branch flow paths.

[0019] In one embodiment, a fifth main flow path and a sixth main flow path are disposed within the third heat sink, the fifth main flow path and the sixth main flow path being spaced apart along the length of the third heat sink, the fifth main flow path being in communication with the second main flow path, and the sixth main flow path being in communication with the third main flow path.

[0020] In one embodiment, a separator is disposed on either end of the fourth main flow path, the separator on one end of the fourth main flow path separating a portion of the third branch flow path from the first channel, and the separator on the other end of the fourth main flow path separating a portion of the third branch flow path from the second channel.

[0021] In one embodiment, an inlet interface and an outlet interface are disposed at the junction, the fifth main flow path is in communication with the outlet interface, and the sixth main flow path is in communication with the inlet interface.

[0022] In one embodiment, the third heat sink is a stamping plate type heat sink. The third heat sink includes a second upper plate and a second lower plate. The second lower plate is fixed under the second upper plate. A flow passage is formed in the second lower plate by stamping. The flow passage communicates with the first heat sink and the second heat sink, respectively, and the connecting portion is disposed on the second upper plate.

[0023] In one embodiment, the heat sink assembly further includes a fifth heat sink and a sixth heat sink, the fifth heat sink is connected between the first heat sink and the third heat sink, and the fifth heat sink is in separate communication with the first heat sink and the third heat sink. The sixth heat sink is connected between the second heat sink and the third heat sink, and the sixth heat sink is in separate communication with the second heat sink and the third heat sink. The fifth heat sink and the sixth heat sink are both harmonica-shaped tube heat sinks.

[0024] In one embodiment, the third heat sink is a stamping plate type heat sink or a harmonica-shaped tube heat sink.

[0025] A battery pack according to an embodiment of the present disclosure includes a heat sink assembly according to an embodiment of the first aspect.

[0026] In one embodiment, the battery pack includes a plurality of battery cores, the battery cores having electrodes, the electrodes corresponding to the main heat dissipation areas of the heat sink assembly.

[0027] In one embodiment, the multiple battery cores are disposed along the length of the first heat sink and the second heat sink.

[0028] A vehicle according to one embodiment of the present disclosure includes the battery pack described above.

[0029] In one embodiment, the vehicle includes an air conditioning system, the connector of the radiator assembly is connected to an air conditioning system pipeline in the vehicle, and the connector and the air conditioning system pipeline are connected in parallel within the vehicle's air conditioning system.

[0030] Additional aspects and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure.

[0031] The above and / or additional aspects and advantages of the present disclosure will become apparent and understandable in the following description of embodiments, which proceeds with reference to the accompanying drawings. [Brief description of the drawings]

[0032] [Figure 1] FIG. 1 is a schematic diagram of a battery pack according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic diagram of a heat sink assembly according to one embodiment of the present disclosure. [Diagram 3] FIG. 2 is a schematic diagram of a heat sink assembly according to one embodiment of the present disclosure. [Figure 3B] FIG. 13 is a schematic diagram of a fourth heat sink of a heat sink assembly according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is an exploded view of a first heat sink or a second heat sink according to an embodiment of the present disclosure. [Diagram 5] FIG. 13 is an exploded view of a third heat sink according to an embodiment of the present disclosure. [Figure 6] FIG. 13 is a schematic diagram of a fourth heat sink according to an embodiment of the present disclosure. [Figure 7] FIG. 13 is a schematic diagram of a fourth heat sink and a first heat sink according to an embodiment of the present disclosure. [Figure 8] FIG. 8 is a schematic diagram of region A in FIG. [Figure 9] FIG. 2 is a schematic diagram of a connection according to one embodiment of the present disclosure. [Figure 10] 1 is a schematic diagram of a vehicle according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] DETAILED DESCRIPTION OF THE DRAWINGS Embodiments of the present disclosure will now be described in detail, by way of example only, with reference to the accompanying drawings.

[0034] A heat sink assembly 100 according to an embodiment of the present disclosure will be described below with reference to Figures 1 to 9. The heat sink assembly 100 may be applied to a battery pack 1000.

[0035] Referring to Figures 1 to 9, a heat sink assembly 100 according to this embodiment of the present disclosure may mainly include a first heat sink 10, a second heat sink 20, a third heat sink 30, and at least one fourth heat sink 40.

[0036] The first heat sink 10 and the second heat sink 20 are disposed opposite to each other. The third heat sink 30 is connected between an end of the first heat sink 10 and an end of the second heat sink 20, and the third heat sink 30 is individually communicated with the first heat sink 10 and the second heat sink 20. A connecting portion 31 is disposed on the third heat sink 30. A main heat dissipation area 32 is formed by being surrounded by the third heat sink 30, the second heat sink 20, and the first heat sink 10. At least one fourth heat sink 40 is located in the main heat dissipation area 32. The at least one fourth heat sink 40 is connected between the first heat sink 10 and the second heat sink 20, and the fourth heat sink 40 is individually communicated with the first heat sink 10 and the second heat sink 20. At least one of the fourth heat sink 40 and the third heat sink 30 are arranged side by side between the first heat sink 10 and the second heat sink 20 .

[0037] Specifically, the refrigerant may enter from the connection 31 of the third radiator 30 and flow to one of the first radiator 10 and the second radiator 20. Since the first radiator 10, the second radiator 20, and the third radiator 30 jointly define a main heat dissipation area 32, the refrigerant in one of the first radiator 10 and the second radiator 20 may enter the main heat dissipation area 32 and enter the other of the first radiator 10 and the second radiator 20 from the main heat dissipation area 32. Then, the refrigerant returns from the other of the first radiator 10 and the second radiator 20 to the third radiator 30 and flows out from the connection 31 of the third radiator 30, thereby implementing the circulation of the refrigerant in the radiator assembly 100. When the radiator assembly 100 is applied to a battery, the cooling circulation of the refrigerant on the battery can be realized.

[0038] 2 to 3, at least one fourth radiator 40 is located in the main heat dissipation area 32, and at least one fourth radiator 40 is connected between the first radiator 10 and the second radiator 20. Thus, the refrigerant in one of the first radiator 10 and the second radiator 20 may flow into the fourth radiator 40 in the main heat dissipation area 32, and then flow from the fourth radiator 40 into the other of the first radiator 10 and the second radiator 20. Such a configuration can not only ensure the circulation flow of the refrigerant, but also increase the flow speed of the refrigerant, thereby improving the cooling efficiency.

[0039] Furthermore, the first heat sink 10 and the second heat sink 20 may both be configured as stamping plate type heat sinks, and the fourth heat sink 40 may be configured as a harmonica-shaped tube heat sink. Specifically, the first heat sink 10 and the second heat sink 20 are both configured as stamping plate type heat sinks. There are relatively many flow paths 122 for the refrigerant to flow inside the stamping plate type heat sink, and the stamping plate type heat sink has a relatively large area in contact with the outside world. Therefore, the cooling efficiency of the heat sink assembly 100 can be improved. The adoption of the harmonica-shaped tube heat sink can reduce the weight of the heat sink assembly 100, reduce the manufacturing cost of the heat sink assembly 100, and ensure uniform heat dissipation of the battery, thereby improving the energy density of the battery pack 1000. However, the present disclosure is not limited thereto.

[0040] Furthermore, when the harmonica-shaped tube radiator is disposed in the main heat dissipation area 32, even if the harmonica-shaped tube radiator is not used to completely fill the main heat dissipation area 32, i.e., there is a part of the main heat dissipation area 32 that cannot contact the outside world for heat dissipation, which may cause the heat dissipation of the heat dissipation assembly 100 to be uneven, the stamping plate type radiator is disposed on both ends of the harmonica-shaped tube radiator, and the stamping plate type radiator can fully contact the outside world, so that after absorbing heat, the stamping plate type radiator can uniformly dissipate the heat to the surroundings to achieve heat dissipation. Therefore, under the premise of reducing the weight of the radiator assembly 100 and reducing the manufacturing cost of the radiator assembly 100, the uniform heat dissipation of the radiator assembly 100 can be guaranteed.

[0041] In addition, the third heat sink 30 may be configured as, but is not limited to, a stamping plate type heat sink or a harmonica-shaped tube heat sink. The third heat sink 30 may be selectively configured according to the requirements for applying the heat sink assembly 100 to various batteries and the manufacturing cost of the heat sink assembly 100. Specifically, when the power of the battery pack 1000 is relatively small, the battery pack 1000 generates relatively little heat, and the heat sink assembly 100 dissipates heat sufficiently for the battery pack 1000, the third heat sink 30 may be configured as a harmonica-shaped tube heat sink. With such a configuration, the weight of the heat sink assembly 100 is reduced, and the battery pack 1000 can be made lighter. When the battery pack 1000 generates relatively more heat, and the heat sink assembly 100 needs to dissipate heat sufficiently for the battery pack 1000, the third heat sink 30 may be configured as a stamping plate type heat sink. Therefore, the applicability of the third heat sink 30 can be improved.

[0042] The heat dissipation assembly 100 of the present disclosure can reduce the weight and cost of the heat dissipation assembly 100 while ensuring heat dissipation performance, compared to when the entire heat dissipation assembly is configured as a stamping plate type heat dissipator. Therefore, the heat dissipation assembly 100 of the present disclosure can improve the heat dissipation uniformity and heat dissipation efficiency of the heat dissipation assembly 100, compared to when the heat dissipation assembly 100 is configured as a plurality of harmonica-shaped tube heat dissipators.

[0043] Therefore, by disposing at least one fourth heat sink 40 between the first heat sink 10 and the second heat sink 20, and configuring both the first heat sink 10 and the second heat sink 20 as stamping plate type heat sinks, and configuring the fourth heat sink 40 as a harmonica-shaped tube heat sink, the weight of the heat sink assembly 100 can be reduced and the performance of the heat sink assembly 100 can be optimized while ensuring uniform heat dissipation of the heat sink assembly 100.

[0044] 4 and 7, at least one open fixing groove 121 is arranged on the side of each of the first heat sink 10 and the second heat sink 20 facing the fourth heat sink 40, and the end of the fourth heat sink 40 is fixed in the corresponding fixing groove 121. Such a configuration not only reduces the difficulty in assembling both ends of the fourth heat sink 40 with the first heat sink 10 and the second heat sink 20, but also ensures the stability of the connection between both ends of the fourth heat sink 40 and the first heat sink 10 and the second heat sink 20, and prevents the fourth heat sink 40 from moving between the first heat sink 10 and the second heat sink 20 to cause structural damage to the heat sink assembly 100, thereby improving the structural reliability of the heat sink assembly 100. In addition, smooth flow of refrigerant between the first radiator 10 and the fourth radiator 40, and smooth mutual flow of refrigerant between the second radiator 20 and the fourth radiator 40 are ensured, thereby further improving the heat dissipation performance of the radiator assembly 100.

[0045] 4 and 7, the first heat sink 10 and the second heat sink 20 mainly include a first upper plate 11 and a first lower plate 12, respectively. The first lower plate 12 is fixed under the first upper plate 11, and a channel 122 and a fixing groove 121 are formed in the first lower plate 12 by stamping. The fixing groove 121 communicates with the channel 122, and the channel 122 communicates with the fourth heat sink 40 through the fixing groove 121. Specifically, the refrigerant may flow from the third heat sink 30 into the channel 122 of the first lower plate 12 of one of the first heat sink 10 and the second heat sink 20. Since the channel 122 communicates with the fixing groove 121, the refrigerant may flow from the channel 122 of one of the first heat sink 10 and the second heat sink 20 into the fixing groove 121. Then, the refrigerant flows from the fixing groove 121 into the fourth radiator 40, and flows from the fourth radiator 40 into the fixing groove 121 of the other of the first radiator 10 and the second radiator 20. Next, the refrigerant flows from the fixing groove 121 of the other of the first radiator 10 and the second radiator 20 into the flow path 122. Finally, the refrigerant returns to the third radiator 30 from the flow path 122 of the other of the first radiator 10 and the second radiator 20, and flows out of the third radiator 30. Such a configuration not only makes the structure of the first radiator 10 and the second radiator 20 more compact, but also ensures the smoothness and stability of the flow of the refrigerant between the first radiator 10 and the second radiator 20 and the fourth radiator 40.

[0046] Furthermore, the depth of the fixing groove 121 is equal to the height of the corresponding fourth heat sink 40, that is, the depth of the fixing groove 121 is equal to the height of the harmonica-shaped tube heat sink. When the end of the harmonica-shaped tube heat sink is placed in the fixing groove 121, the end of the harmonica-shaped tube heat sink is flush with the surface of the first lower plate 12. Therefore, the harmonica-shaped tube heat sink can be prevented from protruding from the first lower plate 12, and when the first upper plate 11 is placed on the first lower plate 12, the situation in which only the harmonica-shaped tube heat sink is in contact with the first upper plate 11 and the flow passage 122 on the first lower plate 12 cannot contact the first upper plate 11 can be avoided. Therefore, the structure of the heat sink assembly 100 is further optimized, and the heat dissipation efficiency of the heat sink assembly 100 is improved.

[0047] In addition, the first upper plate 11 is disposed on the first lower plate 12, and the first upper plate 11 can be in uniform and sufficient contact with the outside world, in which case the first upper plate 11 can uniformly distribute the received heat to the multiple flow channels 122. The flow channels 122 are heated more uniformly, thereby improving the heat dissipation performance of the first heat sink 10 and the second heat sink 20.

[0048] 7 and 8, the width of the fixing groove 121 is the same as the width of the corresponding fourth heat sink 40, and the end of the fourth heat sink 40 is welded into the corresponding fixing groove 121. With such a configuration, the fit between the fourth heat sink 40 and the fixing groove 121 is realized without changing the shape of the end of the fourth heat sink 40, thereby making it possible to facilitate the fit between the fourth heat sink 40 and the fixing groove 121.

[0049] In addition, after the end of the fourth heat sink 40 is placed in the fixing groove 121, the fourth heat sink 40 and the fixing groove 121 are connected and fixed by welding. Therefore, not only can the strength of the connection and fixation between the fourth heat sink 40 and the fixing groove 121 be improved, but the connection between the fourth heat sink 40 and the fixing groove 121 can be made simpler and more direct.

[0050] 8, the first joint surface 41 is disposed on both sides of the end of the fourth heat sink 40, and the second joint surface 1211 is disposed on both sides of the fixing groove 121, and the first joint surface 41 coincides with the second joint surface 1211. Specifically, the first joint surface 41 on both sides of the end of the fourth heat sink 40 coincides with the second joint surface 1211 on both sides of the fixing groove 121. With this configuration, both sides of the end of the fourth heat sink 40 and both sides of the fixing groove 121 can closely coincide with each other, thereby improving the welding strength between the fourth heat sink 40 and the fixing groove 121, and thereby improving the structural reliability of the heat sink assembly 100.

[0051] Referring to FIG. 8, each of the first joint surface 41 and the second joint surface 1211 is either a curved surface, an arc surface, or an inclined plane. Specifically, both sides of the end of the conventional harmonica-shaped tube radiator are arc-shaped, and both sides of the fixing groove 121 are curved. If the gap between the harmonica-shaped tube radiator and the fixing groove 121 is too large, poor welding may occur, and the pressure resistance and pressure burst resistance requirements after welding may not be met. By configuring each of the first joint surface 41 and the second joint surface 1211 to be either a curved surface, an arc surface, or an inclined plane, the two sides of the end of the fourth radiator 40 and the two sides of the fixing groove 121 can be more closely attached to each other. In addition, under the premise that the first bonding surface 41 and the second bonding surface 1211 are in close contact with each other, each of the first bonding surface 41 and the second bonding surface 1211 is selectively configured to be either a curved surface, an arc surface, or an inclined plane, which configuration can not only facilitate the manufacture of the fixing groove 121 and the fourth heat sink 40, but also improve the applicability of the fourth heat sink 40, the first heat sink 10, and the second heat sink 20.

[0052] 1 to 3, a plurality of fourth heat sinks 40 are arranged, and the plurality of fourth heat sinks 40 are spaced apart in the main heat dissipation area 32. Such a configuration can not only improve the heat dissipation efficiency of the heat sink assembly 100, but also make the heat dissipation in the main heat dissipation area 32 more uniform, thereby preventing excessive temperature difference in the battery pack 1000, and further promoting balanced cooling of the battery pack 1000.

[0053] In some embodiments of the present disclosure, referring to FIG. 3 and FIG. 3B, a first main flow path 13 and a second main flow path 14 are arranged in the first heat radiator 10. The first main flow path 13 and the second main flow path 14 are spaced apart in the length direction of the first heat radiator 10. A third main flow path 21 and a fourth main flow path 22 are arranged in the second heat radiator 20, and the third main flow path 21 and the fourth main flow path 22 are spaced apart in the width direction of the second heat radiator 20. The plurality of fourth heat radiators 40 includes a first portion 42, a second portion 43, and a third portion 44. The first main flow path 13 is in communication with the third main flow path 21 through the first portion 42 of the plurality of fourth heat radiators 40, and the first main flow path 13 is in communication with the fourth main flow path 22 through the second portion 43 of the plurality of fourth heat radiators 40. The fourth main flow path 22 communicates with the second main flow path 14 through the third portion 44 of the plurality of fourth radiators 40. For example, in the example of FIG. 3B, along the left-to-right direction, the three leftmost fourth radiators 40 are the first portion 42, the fourth to eighth fourth radiators 40 are the second portion 43, and the ninth to rightmost fourth radiators 40 are the third portion 44. It should be noted that the above quantities are for ease of understanding and may be specially set according to actual circumstances to suit actual applications.

[0054] In some embodiments of the present disclosure, referring to FIG. 3 and FIG. 3B , at least two first branch flow paths 15 are arranged in the first heat radiator 10, the at least two first branch flow paths 15 including a first sub-flow path 151 and a second sub-flow path 152, the first main flow path 13 is in communication with a first portion 42 of the plurality of fourth heat radiators 40 via the first sub-flow path 151, the first main flow path 13 is in communication with a second portion 43 of the plurality of fourth heat radiators 40 via the second sub-flow path 152, and / or at least two second branch flow paths 16 are arranged in the first heat radiator 10, the third portion 44 of the plurality of fourth heat radiators 40 is in communication with the second main flow path 14 via a portion of the at least two second branch flow paths 16, and the second main flow path 14 is in communication with the third heat radiator 30 via another portion of the at least two second branch flow paths 16. For example, in the example of FIG. 3B, along the left-to-right direction, the first to seventh second branch channels 16 communicate with the third portion 44, and the eighth and ninth second branch channels 16 communicate with the third heat radiator 30. The second main channel 14 may directly communicate with the third heat radiator 30, or the second main channel 14 may communicate with the fifth heat radiator 50 through another portion of the second branch channel 16. Of course, the first main channel 13 may communicate with the first portion 42 and the second portion 43, and the first main channel 13 may alternatively communicate with the first portion 42 through the first sub-channel 151, and the first main channel 13 may alternatively communicate with the second portion 43 through the second sub-channel 152.

[0055] In some embodiments of the present disclosure, referring to FIG. 3 and FIG. 3B , at least two fourth branch flow paths 24 are arranged in the second heat radiator 20, the at least two fourth branch flow paths 24 including a first channel 241 and a second channel 242, the second portion 43 of the plurality of fourth heat radiators 40 is in communication with the fourth main flow path 22 via the first channel 241, the fourth main flow path 22 is in communication with the third portion 44 of the plurality of fourth heat radiators 40 via the second channel 242, and / or at least two third branch flow paths 23 are arranged in the second heat radiator 20, the first portion 42 of the plurality of fourth heat radiators 40 is in communication with the third main flow path 21 via a portion of the at least two third branch flow paths 23, and the third main flow path 21 is in communication with the third heat radiator 30 via another portion of the at least two third branch flow paths 23. In other embodiments, the third main flow path 21 may be in direct communication with the third heat radiator 30, or the third main flow path 21 may be in direct communication with the first portion 42 of the plurality of fourth heat radiators 40. For example, in the example of FIG. 3B, five third branch flow paths 23 are shown, and three third branch flow paths 23 adjacent to the left end of the second heat radiator 20 may be a part of the third branch flow path 23, and two third branch flow paths 23 adjacent to the right end of the second heat radiator 20 may be another part of the third branch flow path 23.

[0056] In some embodiments of the present disclosure, referring to Figures 3 and 3B, a fifth main flow path 33 and a sixth main flow path 34 are arranged in the third heat sink 30, the fifth main flow path 33 and the sixth main flow path 34 are spaced apart in the longitudinal direction of the third heat sink 30, the fifth main flow path 33 is connected to the second main flow path 14, and the sixth main flow path 34 is connected to the third main flow path 21.

[0057] Specifically, the refrigerant may enter the third main flow path 21 of the second radiator 20 from the sixth main flow path 34 of the third radiator 30 through another portion of the third branch flow path 23. Next, the refrigerant enters a portion of the third branch flow path 23 from the third main flow path 21, and then enters the first portion 42 of the fourth radiator 40 from a portion of the third branch flow path 23. Next, the refrigerant enters the first sub-flow path 151 of the first radiator 10 from the first portion 42 of the fourth radiator 40, and the refrigerant flows from the first sub-flow path 151 of the first radiator 10 into the first main flow path 13. Thus, the refrigerant in the first main flow path 13 flows from the second sub-flow path 152 through the second portion 43 of the fourth radiator 40 into the first channel 241 of the second radiator 20, and the refrigerant enters the fourth main flow path 22 from the first channel 241. The refrigerant in the fourth main flow path 22 enters a part of the second branch flow path 16 of the first radiator 10 through the third portion 44 of the second channel 242. Then, the refrigerant enters the second main flow path 14 from the second branch flow path 16, and then enters the fifth main flow path 33 of the third radiator 30 from the second main flow path 14 through another portion of the second branch flow path 16, thereby realizing the circulation of the refrigerant in the radiator assembly 100. With this configuration, under the premise of the same surface area, the refrigerant has a longer flow length within the radiator assembly 100, which can not only improve the heat dissipation efficiency of the radiator assembly 100, but also reduce the volume of the radiator assembly 100, thereby facilitating the arrangement of the radiator assembly 100 within the battery pack 1000 and improving the density of the battery pack 1000.

[0058] Similarly, alternatively, the refrigerant may enter the second main flow passage 14 of the first radiator 10 from the fifth main flow passage 33 of the third radiator 30, and then flow in the opposite direction to the above-mentioned circulation flow direction. Finally, the refrigerant enters the sixth main flow passage 34 of the third radiator 30. The effect of the flow passage 122 is the same as that described above, and the details will not be described again in this specification.

[0059] The first main flow path 13 and the second main flow path 14 are flow paths for flowing only within the first heat radiator 10, and the third main flow path 21 and the fourth main flow path 22 are flow paths for flowing only within the second heat radiator 20. The first branch flow path 15 is a flow path through which the first main flow path 13 communicates with the outside, and the second branch flow path 16 is a flow path through which the second main flow path 14 communicates with the outside. The third branch flow path 23 is a flow path through which the third main flow path 21 communicates with the outside, and the fourth branch flow path 24 is a flow path through which the fourth main flow path 22 communicates with the outside.

[0060] In some other embodiments of the present disclosure, the refrigerant may enter one of the first radiator 10 and the second radiator 20 through the third radiator 30, and then enter the fourth radiator 40 through one of the first radiator 10 and the second radiator 20. Then, the refrigerant enters the other of the first radiator 10 and the second radiator 20 through the fourth radiator 40. Finally, the refrigerant enters the third radiator 30 from the other of the first radiator 10 and the second radiator 20. Therefore, the design of the flow path 122 of the radiator assembly 100 can be simplified while ensuring the heat dissipation performance of the radiator.

[0061] 3, the separation section 70 is disposed on the outside of both ends of the fourth main channel 22. The separation section 70 on the outside of one end of the fourth main channel 22 separates a part of the third branch channel 23 from the first channel 241, and the separation section 70 on the outside of the other end of the fourth main channel 22 separates another part of the third branch channel 23 from the second channel 242. For example, the separation section 70 may be configured to have a rounded shape. Therefore, the fluid flows between a part of the third branch channel 23, another part of the third branch channel 23, the first channel 241, and the second channel 242 do not affect each other.

[0062] For example, the separating portion may be configured to have a rounded shape, so that stamping is convenient, and the separating portion can guide the flow of the refrigerant, thereby further improving the smoothness and stability of the flow of the refrigerant. The separating portion can also reduce the noise generated by the flow of the refrigerant to a certain extent.

[0063] For example, first, the refrigerant flows upward from the third main flow path 21, passes through the first portion 42 into the first main flow path 13, and moves downward in the first main flow path 13. Next, the refrigerant passes through the second portion 43 into the fourth main flow path 22, and then flows upward from the fourth main flow path 22. Subsequently, the refrigerant passes through the third portion 44 into the second main flow path 14. A portion of the refrigerant flows upward between the first radiator 10 and the second radiator 20, and another portion of the refrigerant moves downward due to pressure drive, since the flow paths are connected to each other.

[0064] 9, an inlet interface 311 and an outlet interface 312 are disposed on the connecting portion 31. The fifth main flow path 33 communicates with the outlet interface 312, and the sixth main flow path 34 communicates with the inlet interface 311. Specifically, by configuring the inlet interface 311 on the connecting portion 31 to communicate with the sixth main flow path 34 and configuring the outlet interface 312 on the connecting portion 31 to communicate with the fifth main flow path 33, the difficulty in communicating the third heat sink 30 with the first heat sink 10 and the second heat sink 20 can be reduced based on the fact that the inlet interface 311 and the sixth main flow path 34 communicate smoothly with each other and the outlet interface 312 and the fifth main flow path 33 communicate smoothly with each other.

[0065] 9, an inlet 313 and an outlet 314 are further disposed in the connecting portion 31. The inlet 313 communicates with the inlet interface 311, and the outlet 314 communicates with the outlet interface 312. The inlet interface 311 and the outlet interface 312 are both disposed at the bottom of the connecting portion 31, and the inlet 313 and the outlet 314 are both disposed outside the connecting portion 31 in the length direction of the heat sink assembly 100. Such a configuration facilitates communication between the heat sink assembly 100 and the outside world, and ensures that the inlet 313 is stably communicated with the inlet interface 311, and the outlet 314 is stably communicated with the outlet interface 312. For example, the pore size of the inlet 313 is larger than that of the inlet interface 311, and the pore size of the outlet 314 is larger than that of the outlet interface 312.

[0066] Referring to FIG. 5, the third heat sink 30 is a stamping plate type heat sink. The third heat sink 30 includes a second upper plate 37 and a second lower plate 38. The second lower plate 38 is fixed under the second upper plate 37. A channel 122 is formed in the second lower plate 38 by stamping. The connecting portion 31 is disposed on the second upper plate 37. Specifically, by configuring the third heat sink 30 as a stamping plate type heat sink, the contact area between the heat sink assembly 100 and the outside world is further increased, thereby further improving the heat dissipation uniformity of the heat sink assembly 100.

[0067] In addition, an inlet hole 35 and an outlet hole 36 are arranged on the second upper plate 37 of the third radiator 30, and the inlet interface 311 of the connecting part 31 communicates with the inlet hole 35. Therefore, the refrigerant can enter the flow path 122 of the third radiator 30 through the connecting part 31. The outlet interface 312 and the outlet hole 36 on the connecting part 31 communicate with each other, so that the refrigerant can enter the connecting part 31 from the third radiator 30, thereby further improving the efficiency of the refrigerant circulation.

[0068] Referring to FIG. 3, the heat sink assembly 100 further includes a fifth heat sink 50 and a sixth heat sink 60. The fifth heat sink 50 is connected between the first heat sink 10 and the third heat sink 30, and the sixth heat sink 60 is connected between the second heat sink 20 and the third heat sink 30. The fifth heat sink 50 and the sixth heat sink 60 may both be configured as harmonica-shaped tube heat sinks. With this configuration, the weight of the harmonica-shaped tube heat sink is lighter than the weight of the stamping plate type heat sink when the lengths are the same. Therefore, compared to directly disposing stamping plate type heat sinks between the third heat sink 30 and the first heat sink 10 and between the third heat sink 30 and the second heat sink 20, by configuring the fifth heat sink 50 and the sixth heat sink 60 as harmonica-shaped tube heat sinks, the weight of the heat sink assembly 100 can be further reduced while ensuring the heat dissipation efficiency of the heat sink assembly 100.

[0069] Optionally, a channel 122 and a fixing groove 121 are formed in the fifth heat sink 50 by stamping, and the fixing groove 121 communicates with the channel 122. The fifth heat sink 50 may communicate with the first heat sink 10 through the corresponding channel 122. Specifically, the refrigerant may flow from the first heat sink 10 into the channel 122 of the fifth heat sink 50, and since the channel 122 communicates with the fixing groove 121, the refrigerant may flow from the channel 122 in the first heat sink 10 into the fixing groove 121. Then, the refrigerant flows from the fixing groove 121 into the fifth heat sink 50 and into the fixing groove 121 corresponding to the fifth heat sink 50. Then, the refrigerant flows from the fixing groove 121 of the fifth heat sink 50 into the channel 122 corresponding to the fifth heat sink 50. Therefore, the smoothness and stability of the flow of the refrigerant between the first radiator 10 and the fifth radiator 50 can be guaranteed. Of course, alternatively, the refrigerant may flow in the opposite direction according to the above path.

[0070] In addition, a flow passage 122 and a fixing groove 121 are formed in the sixth heat dissipator 60 by stamping, and the fixing groove 121 is in communication with the flow passage 122. The sixth heat dissipator 60 may be in communication with the second heat dissipator 20 through the corresponding flow passage 122. Specifically, the refrigerant may flow from the sixth heat dissipator 60 into the flow passage 122 of the second heat dissipator 20. Since the flow passage 122 is in communication with the fixing groove 121, the refrigerant may flow from the flow passage 122 in the sixth heat dissipator 60 into the fixing groove 121. Then, the refrigerant flows from the fixing groove 121 into the second heat dissipator 20 and into the corresponding fixing groove 121 of the second heat dissipator 20. Then, the refrigerant flows from the fixing groove 121 of the second heat dissipator 20 into the corresponding flow passage 122 of the second heat dissipator 20. Therefore, the smoothness and stability of the flow of the refrigerant between the sixth radiator 60 and the second radiator 20 can be guaranteed. For example, the structure of the fifth radiator 50 and the sixth radiator 60 may be substantially the same as the structure of the first radiator 10 or the second radiator 20.

[0071] 1, a battery pack 1000 according to an embodiment of the present disclosure may mainly include a plurality of battery cores 200 having electrodes 201 and the heat dissipation assembly 100 described above. The main heat dissipation area 32 of the heat dissipation assembly 100 corresponds to the electrodes 201. Specifically, the electrodes 201 of the plurality of battery cores 200 correspond to the main heat dissipation area 32, and the main heat dissipation area 32 can dissipate the heat of the electrodes 201 of the plurality of battery cores 200, thereby improving the heat dissipation performance and reliability of the battery pack 1000. In addition, since the heat dissipation performance of the battery pack 1000 is improved, the power limit of the heat dissipation of the battery pack 1000 is also reduced, thereby improving the performance of the battery pack 1000.

[0072] 1, the multiple battery cores 200 are arranged in the length direction of the first heat sink 10 and the second heat sink 20. Such a configuration not only facilitates the arrangement of the heat sink assembly 100 in the battery pack 1000, but also maximizes the space of the battery pack 1000, so that the heat sink assembly 100 can dissipate heat more uniformly for the multiple battery cores 200.

[0073] Furthermore, the positive electrode 2011 of the battery core 200 and the negative electrode 2012 of the battery core 200 are disposed at both ends in the longitudinal direction of the battery core 200. The positive electrode 2011 of the battery core 200 and the negative electrode 2012 of the battery core 200 generate the most heat. Therefore, by arranging a plurality of fourth heat sinks 40 in the longitudinal direction between the first heat sink 10 and the second heat sink 20, and making the plurality of fourth heat sinks 40 correspond to the positive electrodes 2011 of the plurality of battery cores 200 and the negative electrodes 2012 of the plurality of battery cores 200, i.e., by ensuring that as many fourth heat sinks 40 as possible are arranged on the positive electrodes 2011 and negative electrodes 2012 of each battery core 200 to dissipate the heat of the positive electrodes 2011 and negative electrodes 2012 of the plurality of battery cores 200, the weight of the heat sink assembly 100 can be reduced, and the structural design of the heat sink assembly 100 can be optimized.

[0074] Referring to FIG. 10, a vehicle 2000 according to one embodiment of the present disclosure includes the battery pack 1000 described above.

[0075] As the only inlet and outlet of the refrigerant in the radiator assembly 100, the connection part 31 of the radiator assembly 100 may be connected to an air conditioning system pipeline 2002 in the vehicle 2000, and the connection part 31 and the air conditioning system pipeline 2002 are connected in parallel in the air conditioning system 2001 of the vehicle 2000. The radiator assembly 100 may be used as an evaporator or a condenser in the battery pack 1000. The air conditioning controller of the vehicle 2000 controls whether the refrigerant flows into the radiator assembly 100, and controls the evaporation (condensation) of the refrigerant in the radiator assembly 100 according to the requirements of the battery pack 1000 to realize the cooling (heating) of the battery pack 1000. The radiator assembly 100 may be used in parallel connection with other evaporators or condensers in the air conditioning system 2001, or the radiator assembly 100 may be used alone as an evaporator or a condenser in the air conditioning system 2001.

[0076] When the radiator assembly 100 is used as an evaporator, the liquid refrigerant evaporates in the radiator assembly 100 to cool the battery pack 1000. When the radiator assembly 100 is used as a condenser, the gas refrigerant condenses in the radiator assembly 100 to heat the battery pack 1000. Because the refrigerant flows inside the radiator assembly 100, the radiator assembly 100 has high heat dissipation efficiency and high energy efficiency compared to a heat exchanger with a single-phase liquid flowing inside.

[0077] Furthermore, the radiator assembly 100 of the vehicle 2000 transfers heat by a phase change of the refrigerant (gas to liquid or liquid to gas). The heat transfer efficiency of the refrigerant is higher than that of a conventional single-phase liquid working fluid, so it further contributes to cooling and heating the battery pack 1000, thereby improving the energy efficiency ratio of the air conditioning system 2001 on the vehicle 2000 and reducing the energy consumption of the air conditioning system 2001.

[0078] In describing the present disclosure, it should be understood that the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are orientations or positional relationships indicated based on the accompanying drawings, and are not intended to suggest or imply that devices or elements should have a particular orientation or be constructed and operated in a particular orientation, but are merely used to explain and simplify the description of the present disclosure, and therefore should not be construed as limitations on the present disclosure.

[0079] In the description herein, a description using the reference terms "one embodiment," "some embodiments," "exemplary embodiments," "one example," "particular examples," or "some examples" means that the particular feature, structure, material, or characteristic described with reference to the embodiment or example is included in at least one embodiment or example of the disclosure. In the description herein, general descriptions of the aforementioned terms do not necessarily refer to the same embodiment or example.

[0080] While embodiments of the present disclosure have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of the present disclosure being as defined by the appended claims and their equivalents. [Explanation of symbols]

[0081] 1000 Battery Packs 2000 vehicles 2001 Air conditioning system 2002 Air conditioning system pipeline 100 Heat sink assembly 200 Battery Core 201 Electrode 10 First heat sink 11 First Top Plate 12 First Lower Plate 121 Fixed groove 1211 Second joint surface 122 Channel 13 First main channel 14 Second main channel 15 First branch channel 151 First Sub-channel 152 Second Sub-channel 16 Second branch channel 20 Second heat sink 21 Third main channel 22 Fourth Main Channel 23 Third branch channel 24 Fourth branch 241 First Channel 242 Second Channel 30 Third heat sink 31 Connecting part 311 Ingress Interface 312 Exit Interface 313 Entrance 314 Exit 32 Main heat dissipation area 33 Fifth Main Channel 34 6th Main Channel 35 Entrance hole 36 Exit hole 37 Second Top Plate 38 Second Lower Plate 40 Fourth Heat Sink 41 First joint surface 42 First Part 43 Second Part 44 Third Part 50 Fifth Heat Sink 60 6th Heat Sink 70 Separation section

Claims

1. A first heat sink (10); A second heat radiator (20), the second heat radiator (20) and the first heat radiator (10) being disposed opposite each other; a third heat sink (30), the third heat sink (30) being connected between the first heat sink (10) and the second heat sink (20), the third heat sink (30) being in communication with the first heat sink (10) and the second heat sink (20) individually, the third heat sink (30) being provided with a connecting portion (31), and a main heat dissipation area (32) being formed by being surrounded by the third heat sink (30), the second heat sink (20), and the first heat sink (10); at least one fourth heat sink (40), the at least one fourth heat sink (40) being located in the main heat dissipation area (32), the at least one fourth heat sink (40) being connected between the first heat sink (10) and the second heat sink (20), the fourth heat sink (40) being in separate communication with the first heat sink (10) and the second heat sink (20), the at least one fourth heat sink (40) and the third heat sink (30) being arranged side by side between the first heat sink (10) and the second heat sink (20), the first heat sink (10) and the second heat sink (20) both being stamping plate type heat sinks, and the fourth heat sink (40) being a harmonica-shaped tube heat sink; A heat sink assembly (100) comprising:

2. The radiator assembly (100) of claim 1, wherein at least one open fixing groove (121) is arranged on the side of each of the first radiator (10) and the second radiator (20) facing the fourth radiator (40), and an end of the fourth radiator (40) is fixed within the corresponding fixing groove (121).

3. 3. The radiator assembly (100) of claim 2, wherein the first radiator (10) and the second radiator (20) respectively comprise a first upper plate (11) and a first lower plate (12), the first lower plate (12) is fixed under the first upper plate (11), a flow path (122) and the fixing groove (121) are formed in the first lower plate (12) by stamping, the fixing groove (121) is in communication with the flow path (122), and the flow path (122) is in communication with the fourth radiator (40) via the fixing groove (121).

4. The radiator assembly (100) of claim 2 or 3, wherein the width of the fixing groove (121) is the same as the width of the corresponding fourth radiator (40), and the end of the fourth radiator (40) is welded into the corresponding fixing groove (121).

5. The radiator assembly (100) according to any one of claims 2 to 4, wherein a depth of the fixing groove (121) is equal to a height of the corresponding fourth radiator (40).

6. A heat sink assembly (100) according to any one of claims 2 to 5, wherein a first joining surface (41) is arranged on both sides of the end of the fourth heat sink (40), a second joining surface (1211) is arranged on both sides of the fixing groove (121) corresponding to the fourth heat sink (40), and the first joining surface (41) coincides with the second joining surface (1211).

7. The heat sink assembly (100) of claim 6, wherein each of the first mating surface (41) and the second mating surface (1211) is either a curved surface, an arc surface, or an inclined plane surface.

8. The heat dissipation assembly (100) of any one of claims 1 to 7, further comprising a plurality of fourth heat dissipators (40), said plurality of fourth heat dissipators (40) being spaced apart within said main heat dissipation area (32).

9. A first main flow path (13) and a second main flow path (14) are arranged in the first radiator (10), and the first main flow path (13) and the second main flow path (14) are spaced apart in the longitudinal direction of the first radiator (10); a third main flow path (21) and a fourth main flow path (22) are arranged in the second radiator (20), and the third main flow path (21) and the fourth main flow path (22) are spaced apart from each other in a width direction of the second radiator (20); 9. The radiator assembly (100) of claim 8, wherein the plurality of fourth radiators (40) comprises a first portion (42), a second portion (43), and a third portion (44), the first main flow path (13) communicates with the third main flow path (21) through the first portions (42) of the plurality of fourth radiators (40), the first main flow path (13) communicates with the fourth main flow path (22) through the second portions (43) of the plurality of fourth radiators (40), and the fourth main flow path (22) communicates with the second main flow path (14) through the third portions (44) of the plurality of fourth radiators (40).

10. at least two first branch channels (15) are arranged in the first radiator (10), the at least two first branch channels (15) comprising a first sub-channel (151) and a second sub-channel (152), the first main channel (13) communicates with the first portion (42) of the plurality of fourth radiators (40) via the first sub-channel (151), and the first main channel (13) communicates with the second portion (43) of the plurality of fourth radiators (40) via the second sub-channel (152); and / or 10. The radiator assembly (100) of claim 9, wherein at least two second branch flow paths (16) are disposed within the first radiator (10), the third portion (44) of the plurality of fourth radiators (40) is in communication with the second main flow path (14) via a portion of the at least two second branch flow paths (16), and the second main flow path (14) is in communication with the third radiator (30) via another portion of the at least two second branch flow paths (16).

11. at least two fourth branch flow paths (24) are arranged in the second radiator (20), the at least two fourth branch flow paths (24) having a first channel (241) and a second channel (242), the second portion (43) of the plurality of fourth radiators (40) communicates with the fourth main flow path (22) via the first channel (241), and the fourth main flow path (22) communicates with the third portion (44) of the plurality of fourth radiators (40) via the second channel (242); and / or 11. The radiator assembly (100) according to claim 9 or 10, wherein at least two third branch flow paths (23) are arranged in the second radiator (20), the first portion (42) of the plurality of fourth radiators (40) is in communication with the third main flow path (21) via a portion of the at least two third branch flow paths (23), and the third main flow path (21) is in communication with the third radiator (30) via another portion of the at least two third branch flow paths (23).

12. 12. The radiator assembly (100) according to any one of claims 9 to 11, wherein a fifth main flow path (33) and a sixth main flow path (34) are arranged in the third radiator (30), the fifth main flow path (33) and the sixth main flow path (34) are spaced apart in the longitudinal direction of the third radiator (30), the fifth main flow path (33) communicates with the second main flow path (14), and the sixth main flow path (34) communicates with the third main flow path (21).

13. 13. The radiator assembly (100) according to any one of claims 9 to 12, wherein a separation portion (70) is arranged on the outside of both ends of the fourth main flow path (22), the separation portion (70) on the outside of one end of the fourth main flow path (22) separating a part of the third branch flow path (23) from the first channel (241), and the separation portion (70) on the outside of the other end of the fourth main flow path (22) separating another part of the third branch flow path (23) from the second channel (242).

14. 14. The radiator assembly (100) according to any one of claims 9 to 13, wherein an inlet interface (311) and an outlet interface (312) are arranged in the connection portion (31), the fifth main flow path (33) communicates with the outlet interface (312), and the sixth main flow path (34) communicates with the inlet interface (311).

15. 15. The radiator assembly (100) according to any one of claims 1 to 14, wherein the third radiator (30) comprises a second upper plate (37) and a second lower plate (38), the second lower plate (38) is fixed under the second upper plate (37), a flow passage (122) is formed in the second lower plate (38) by stamping, the flow passage (122) is in communication with the first radiator (10) and the second radiator (20), respectively, and the connecting portion (31) is disposed on the second upper plate (37).

16. 16. The radiator assembly (100) of any one of claims 13 to 15, further comprising a fifth radiator (50) and a sixth radiator (60), the fifth radiator (50) being connected between the first radiator (10) and the third radiator (30), the fifth radiator (50) being in separate communication with the first radiator (10) and the third radiator (30), the sixth radiator (60) being connected between the second radiator (20) and the third radiator (30), the sixth radiator (60) being in separate communication with the second radiator (20) and the third radiator (30), and both the fifth radiator (50) and the sixth radiator (60) being harmonica-shaped tube radiators.

17. The heat sink assembly (100) of any one of claims 1 to 16, wherein the third heat sink (30) is a stamped plate type heat sink or a harmonica shaped tube heat sink.

18. A battery pack (1000) comprising the heat sink assembly (100) according to any one of claims 1 to 17.

19. 20. The battery pack (1000) of claim 18, comprising a plurality of battery cores (200), each having an electrode (201), the electrode (201) corresponding to the main heat dissipation area (32) of the heat sink assembly (100).

20. 20. The battery pack (1000) according to claim 18 or 19, wherein the plurality of battery cores (200) are arranged in a longitudinal direction of the first heat sink (10) and the second heat sink (20).

21. A vehicle (2000) comprising the battery pack (1000) according to any one of claims 18 to 20.

22. 22. The vehicle (2000) of claim 21, comprising an air conditioning system (2001), wherein the connection portion (31) of the radiator assembly (100) is connected to an air conditioning system pipeline (2002) in the vehicle (2000), and the connection portion (31) and the air conditioning system pipeline (2002) are connected in parallel within the air conditioning system (2001) of the vehicle (2000).

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