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JP-7857432-B2 - Heat radiator assemblies, battery packs, and vehicles

JP7857432B2JP 7857432 B2JP7857432 B2JP 7857432B2JP-7857432-B2

Inventors

  • シアオ、シアオリン
  • チョン、リチュン
  • ツァイ、ヤオミン
  • ポン、チンポー

Assignees

  • ビーワイディー カンパニー リミテッド

Dates

Publication Date
20260512
Application Date
20230428
Priority Date
20220429

Claims (20)

  1. The first heat sink (10) and A second heat sink (20), wherein the second heat sink (20) and the first heat sink (10) are arranged facing each other. A third heat sink (30) is connected between the first heat sink (10) and the second heat sink (20), and the third heat sink (30) communicates individually with the first heat sink (10) and the second heat sink (20), and a connecting portion (31) is provided on the third heat sink (30), and a main heat dissipation region (32) is formed surrounded by the third heat sink (30), the second heat sink (20), and the first heat sink (10), and the third heat sink (30), The system comprises at least one fourth heat sink (40), wherein the at least one fourth heat sink (40) is located within the main heat dissipation region (32), the at least one fourth heat sink (40) is connected between the first heat sink (10) and the second heat sink (20), the fourth heat sink (40) communicates individually 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) are 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) are both stamping plate type heat sinks, and the fourth heat sink (40) is a harmonica-shaped tube heat sink . Multiple fourth heat sinks (40) are provided, and the multiple fourth heat sinks (40) are spaced apart within the main heat dissipation region (32). A first main flow path (13) and a second main flow path (14) are arranged within the first heat sink (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 heat sink (10). A third main flow path (21) and a fourth main flow path (22) are arranged within the second heat sink (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 sink (20). A heat sink assembly (100) wherein the plurality of fourth heat sinks (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) via the first portion (42) of the plurality of fourth heat sinks (40), the first main flow path (13) communicates with the fourth main flow path (22) via the second portion (43) of the plurality of fourth heat sinks (40), and the fourth main flow path (22) communicates with the second main flow path (14) via the third portion (44) of the plurality of fourth heat sinks (40).
  2. The heat sink assembly (100) according to claim 1, wherein at least one open fixing groove (121) is provided 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 within the corresponding fixing groove (121).
  3. The heat sink assembly (100) according to claim 2, wherein the first heat sink (10) and the second heat sink (20) each comprise a first upper plate (11) and a first lower plate (12), the first lower plate (12) being fixed below the first upper plate (11), a flow path (122) and the fixing groove (121) being formed within the first lower plate (12) by stamping, the fixing groove (121) communicating with the flow path (122), and the flow path (122) communicating with the fourth heat sink (40) via the fixing groove (121).
  4. The heat sink assembly (100) according to claim 2 or 3, wherein 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).
  5. The heat sink assembly (100) according to claim 2 or 3, wherein the depth of the fixing groove (121) is equal to the height of the corresponding fourth heat sink (40).
  6. A heat sink assembly (100) according to claim 2 or 3, wherein first joining surfaces (41) are positioned on both sides of the end of the fourth heat sink (40), and second joining surfaces (1211) are positioned on both sides of the fixing groove (121) corresponding to the fourth heat sink (40), and the first joining surfaces (41) coincide with the second joining surfaces (1211).
  7. The heat sink assembly (100) according to claim 6, wherein each of the first joining surface (41) and the second joining surface (1211) is either a curved surface, an arc surface, or an inclined plane.
  8. At least two first branch channels (15) are arranged within the first heat sink (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 heat sinks (40) via the first sub-channel (151), the first main channel (13) communicates with the second portion (43) of the plurality of fourth heat sinks (40) via the second sub-channel (152), and/or A heat sink assembly (100) according to claim 1, wherein at least two second branch channels (16) are arranged within the first heat sink (10), the third portion (44) of the plurality of fourth heat sinks (40) communicates with the second main channel (14) via portions of the at least two second branch channels (16), and the second main channel (14) communicates with the third heat sink (30) via other portions of the at least two second branch channels (16).
  9. At least two fourth branch channels (24) are arranged within the second heat sink (20), the at least two fourth branch channels (24) each comprising a first channel (241) and a second channel (242), the second portion (43) of the plurality of fourth heat sinks (40) communicates with the fourth main channel (22) via the first channel (241), the fourth main channel (22) communicates with the third portion (44) of the plurality of fourth heat sinks (40) via the second channel (242), and/or A heat sink assembly (100) according to claim 1, wherein at least two third branch channels (23) are arranged within the second heat sink (20), the first portion (42) of the plurality of fourth heat sinks (40) communicates with the third main channel (21) via portions of the at least two third branch channels (23), and the third main channel (21) communicates with the third heat sink (30) via other portions of the at least two third branch channels (23).
  10. A heat sink assembly (100) according to claim 1, wherein a fifth main flow path (33) and a sixth main flow path (34) are arranged within 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 in communication with the second main flow path (14), and the sixth main flow path (34) is in communication with the third main flow path (21).
  11. The heat sink assembly (100) according to claim 9, wherein separation sections (70) are arranged on the outside of both ends of the fourth main flow path (22), the separation section (70) on the outside of one end of the fourth main flow path (22) separates a portion of the third branch flow path (23) from the first channel (241), and the separation section (70) on the outside of the other end of the fourth main flow path (22) separates another portion of the third branch flow path (23) from the second channel (242).
  12. The heat sink assembly (100) according to claim 10, wherein an inlet interface (311) and an outlet interface (312) are arranged in the connecting portion (31), the fifth main flow path (33) is in communication with the outlet interface (312), and the sixth main flow path (34) is in communication with the inlet interface ( 311 ).
  13. The heat sink assembly (100) according to claim 1, wherein the third heat sink (30) comprises a second upper plate (37) and a second lower plate (38), the second lower plate (38) being fixed below the second upper plate (37), a flow path (122) being formed within the second lower plate (38) by stamping, the flow path (122) communicating with the first heat sink (10) and the second heat sink (20), respectively, and the connecting portion (31) being positioned on the second upper plate (37).
  14. The heat sink assembly (100) according to claim 11, further comprising a fifth heat sink (50) and a sixth heat sink (60), wherein the fifth heat sink (50) is connected between the first heat sink (10) and the third heat sink (30), the fifth heat sink (50) is individually in communication with the first heat sink (10) and the third heat sink (30), the sixth heat sink (60) is connected between the second heat sink (20) and the third heat sink (30), the sixth heat sink (60) is individually in communication with the second heat sink (20) and the third heat sink (30), and both the fifth heat sink (50) and the sixth heat sink (60) are harmonica-shaped tube heat sinks.
  15. The heat sink assembly (100) according to claim 1, wherein the third heat sink (30) is a stamping plate type heat sink or a harmonica-shaped tube heat sink.
  16. A battery pack (1000) comprising the heat sink assembly (100) described in claim 1.
  17. A battery pack (1000) according to claim 16, comprising a plurality of battery cores (200), wherein each battery core (200) has an electrode (201), and the electrode (201) corresponds to the main heat dissipation region ( 32 ) of the heat sink assembly (100).
  18. The battery pack (1000) according to claim 17 , wherein the plurality of battery cores (200) are arranged in the longitudinal direction of the first heat sink (10) and the second heat sink (20).
  19. A vehicle (2000) comprising the battery pack (1000) according to claim 16 .
  20. The vehicle (2000) according to claim 19, comprising an air conditioning system (2001), wherein the connecting portion (31) of the radiator assembly (100) is connected to an air conditioning system pipeline (2002) within the vehicle (2000), and the connecting portion (31) and the air conditioning system pipeline (2002) are connected in parallel within the air conditioning system ( 2001 ) of the vehicle (2000).

Description

Cross-reference of Related Applications This disclosure claims priority and benefit to Chinese Patent Application No. 202221059926.4, entitled “HEAT RADIATOR ASSEMBLY, BATTERY PACK, AND VEHICLE,” filed by BYD Co., Ltd. on 29 April 2022. The entire contents of the above referenced application are incorporated herein by reference. This disclosure relates to the technology of batteries, and more particularly to heat sink assemblies, battery packs, and vehicles. In related technologies, some batteries dissipate heat through heat sinks made of stamped brazed plates. Heat sinks made of stamped brazed plates are relatively heavy and expensive, thus not contributing to improving the overall energy density of the pack. Furthermore, their complex internal flow path design and relatively long flow paths result in relatively large losses. Consequently, relatively large temperature differences occur between different parts of the battery, failing to contribute to balanced cooling of the battery. This is a schematic diagram of a battery pack according to one embodiment of the present disclosure.This is a schematic diagram of a heat sink assembly according to one embodiment of the present disclosure.This is a schematic diagram of a heat sink assembly according to one embodiment of the present disclosure.This is a schematic diagram of a fourth heat sink in a heat sink assembly according to one embodiment of the present disclosure.This is an exploded view of a first or second heat sink according to one embodiment of the present disclosure.This is an exploded view of a third heat sink according to one embodiment of the present disclosure.This is a schematic diagram of a fourth heat sink according to one embodiment of the present disclosure.This is a schematic diagram of a fourth heat sink and a first heat sink according to one embodiment of the present disclosure.This is a schematic diagram of region A in Figure 7.This is a schematic diagram of a connecting portion according to one embodiment of the present disclosure.This is a schematic diagram of a vehicle according to one embodiment of the present disclosure. Embodiments of this disclosure are described in detail below, and embodiments described with reference to the accompanying drawings are illustrative. A heat sink assembly 100 according to one 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. Referring to Figures 1 to 9, the 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. The first heat sink 10 and the second heat sink 20 are arranged facing each other. The third heat sink 30 is connected between the end of the first heat sink 10 and the end of the second heat sink 20, and the third heat sink 30 communicates individually with the first heat sink 10 and the second heat sink 20. A connecting portion 31 is provided on the third heat sink 30. The main heat dissipation region 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 within the main heat dissipation region 32. 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 communicates individually with the first heat sink 10 and the second heat sink 20. At least one fourth heat sink 40 and a third heat sink 30 are arranged side-by-side between the first heat sink 10 and the second heat sink 20. Specifically, the refrigerant may enter from the connecting portion 31 of the third heat sink 30 and flow into one of the first heat sink 10 and the second heat sink 20. Since the first heat sink 10, the second heat sink 20, and the third heat sink 30 jointly define the main heat dissipation region 32, the refrigerant in one of the first heat sink 10 and the second heat sink 20 may enter the main heat dissipation region 32 and then flow from the main heat dissipation region 32 into the other of the first heat sink 10 and the second heat sink 20. Subsequently, the refrigerant returns to the third heat sink 30 from the other of the first heat sink 10 and the second heat sink 20, and flows out from the connecting portion 31 of the third heat sink 30, thereby circulating the refrigerant within the heat sink assembly 100. When the heat sink assembly 100 is applied to a battery, cooling circulation of the refrigerant can be achieved on the battery. Referring to Figures 2 and 3, at least one fourth radiator 40 is located within the main heat dissipation region 32, and at least one fourth radiator 40 is connected between the first radiator 10 and the second radiator 20. Therefore, the refrigerant in one of the first radiator 10 and the second radiator 20 may flow into the fourth radiator 40 within