CN-224232699-U - Liquid cooling plate of battery pack and battery pack

Abstract

The embodiment of the application relates to the technical field of energy storage, and provides a liquid cooling plate of a battery pack and the battery pack, wherein the liquid cooling plate comprises a flow passage plate and a first drainage plate, a plurality of first flow passages and a plurality of second flow passages are arranged in the flow passage plate, the first flow passages and the second flow passages are communicated, are arranged side by side and are alternately arranged along the side by side arrangement direction. Through the setting of first drainage board, form the third runner between first drainage board and the runner board, can realize the parallelly connected setting of a plurality of first runners through the third runner, and need not to realize the parallelly connected setting of a plurality of first runners through a plurality of pipelines to can reduce the quantity of pipeline, avoid complicated pipe connection, and then effectively reduce the structural complexity of liquid cooling board, can also effectively reduce the volume of liquid cooling board, improve the practicality of liquid cooling board.

Inventors

• JIANG ZHIWEI
• HONG FANGJUN

Assignees

• 华为技术有限公司

Dates

Publication Date

20260512

Application Date

20250305

Claims (19)

1. 1. The liquid cooling plate of the battery pack is characterized by comprising a flow passage plate, wherein a first type of flow passage and a second type of flow passage are arranged in the flow passage plate, the first type of flow passage and the second type of flow passage are communicated, the first type of flow passage and the second type of flow passage are arranged side by side and are alternately arranged in the side by side arrangement direction, the flow passage directions of the first type of flow passage and the second type of flow passage are opposite, and the flow passage direction of cooling liquid in the flow passage is the flow direction of cooling liquid in the flow passage; The liquid cooling plate further comprises a first drainage plate, wherein the first drainage plate is arranged on the outer surface of the flow channel plate and forms a third flow channel with the outer surface of the flow channel plate, the third flow channel is used for being communicated with a liquid inlet or a liquid outlet of the liquid cooling plate and extends along the side-by-side arrangement direction, a plurality of first through holes are formed in the outer surface of the flow channel plate and used for communicating the third flow channel in the flow channel plate with the first flow channel, and the first flow channel comprises a plurality of first flow channels corresponding to the first through holes.
2. 2. The liquid cooling plate according to claim 1, wherein the first flow guiding plate is provided in a stacked manner with the flow channel plate in a thickness direction of the flow channel plate, and the plurality of first through holes are provided on an outer surface of the flow channel plate in the thickness direction.
3. 3. The liquid cooling plate according to claim 2, wherein the plurality of first through holes are aligned with the plurality of first flow passages in the thickness direction, and the plurality of first through holes are aligned with the third flow passages in the thickness direction.
4. 4. A liquid cooling plate according to any one of claims 1-3, wherein the first flow guiding plate is fastened to an outer surface of the flow channel plate, and the first flow guiding plate and the outer surface of the flow channel plate form the third flow channel.
5. 5. A liquid cooling plate according to any one of claims 1 to 3, wherein the surface of the first flow guiding plate facing the flow channel plate is provided with a groove, the liquid cooling plate further comprises a cover plate laminated between the outer surface of the flow channel plate and the first flow guiding plate, the cover plate seals the groove on the first flow guiding plate and forms the third flow channel, the cover plate is provided with a plurality of second through holes, and the plurality of second through holes and the plurality of first through holes are opposite to each other in the thickness direction of the flow channel plate.
6. 6. A liquid cooling plate according to any one of claims 1-3, wherein a fourth flow channel is further provided in the flow channel plate, the fourth flow channel extends along the side-by-side arrangement direction, the second flow channels comprise a plurality of second flow channels which are all communicated with the fourth flow channel, the third flow channel is used for being communicated with one of a liquid inlet or a liquid outlet of the liquid cooling plate, and the fourth flow channel is used for being communicated with the other one of the liquid inlet or the liquid outlet.
7. 7. The liquid cooling plate according to claim 4, wherein a fourth flow channel is further arranged in the flow channel plate, the fourth flow channel extends along the side-by-side arrangement direction, the second flow channels comprise a plurality of second flow channels which are all communicated with the fourth flow channel, the third flow channel is used for being communicated with one of a liquid inlet and a liquid outlet of the liquid cooling plate, and the fourth flow channel is used for being communicated with the other one of the liquid inlet and the liquid outlet.
8. 8. The liquid cooling plate according to claim 5, wherein a fourth flow channel is further arranged in the flow channel plate, the fourth flow channel extends along the side-by-side arrangement direction, the second flow channels comprise a plurality of second flow channels which are all communicated with the fourth flow channel, the third flow channel is used for being communicated with one of a liquid inlet and a liquid outlet of the liquid cooling plate, and the fourth flow channel is used for being communicated with the other one of the liquid inlet and the liquid outlet.
9. 9. The liquid cooling plate according to claim 6, wherein a first assembling hole and a second assembling hole are formed in the first drainage plate, the first assembling hole is communicated with the third flow channel, the second assembling hole is communicated with the fourth flow channel, the first assembling hole is used for being communicated with one of the liquid inlet and the liquid outlet, and the second assembling hole is used for being communicated with the other of the liquid inlet and the liquid outlet.
10. 10. The liquid cooling plate according to claim 6, wherein the first drainage plate is provided with a first assembly hole, the first assembly hole is communicated with the third flow channel, the first assembly hole is used for being communicated with one of the liquid inlet and the liquid outlet, the liquid cooling plate further comprises a second drainage plate, the second drainage plate is arranged on the outer surface of the flow channel plate, the second assembly hole is formed in the second drainage plate, the second assembly hole is communicated with the fourth flow channel, and the second assembly hole is used for being communicated with the other of the liquid inlet and the liquid outlet.
11. 11. The liquid cooling plate according to claim 10, wherein the second flow guiding plate and the flow channel plate are stacked in a thickness direction of the flow channel plate, a third through hole communicated with the fourth flow channel is further formed in an outer surface of the flow channel plate, and the second assembly hole is communicated with the third through hole.
12. 12. The liquid cooling plate according to claim 11, wherein the second flow guiding plate and the first flow guiding plate are located on opposite sides of the flow channel plate in the thickness direction.
13. 13. The liquid cooling plate according to claim 6, wherein the fourth flow passage is located on one side of the first flow passage in the flow passage direction, and the plurality of first through holes are located at one end of the plurality of first flow passages toward the fourth flow passage.
14. 14. The liquid cooling plate according to claim 7, wherein the fourth flow passage is located at one side of the first flow passage in the flow passage direction, and the plurality of first through holes are located at one end of the plurality of first flow passages toward the fourth flow passage.
15. 15. A liquid cooling plate according to any one of claims 1 to 3, wherein the flow channel plate comprises a base plate and a base plate which are stacked, a plurality of first grooves and a plurality of second grooves are formed in the surface of the base plate facing the base plate, the plurality of first grooves and the plurality of second grooves are alternately arranged along the side-by-side arrangement direction, the base plate seals the plurality of first grooves and forms a plurality of first flow channels of the first type flow channel, the base plate seals the plurality of second grooves and forms a plurality of second flow channels of the second type flow channel, the first drainage plate is located on the outer surface of one side of the base plate facing away from the base plate, and the plurality of first through holes are formed in the base plate.
16. 16. The liquid cooling plate according to claim 6, wherein the flow channel plate comprises a bottom plate and a substrate which are stacked, a plurality of first grooves and a plurality of second grooves are formed in the surface of the bottom plate facing the substrate, the plurality of first grooves and the plurality of second grooves are alternately arranged along the side-by-side arrangement direction, the substrate seals the plurality of first grooves and forms a plurality of first flow channels of the first type flow channel, the substrate seals the plurality of second grooves and forms a plurality of second flow channels of the second type flow channel, the first flow guiding plate is positioned on the outer surface of one side of the substrate facing away from the bottom plate, and the plurality of first through holes are formed in the substrate.
17. 17. A liquid cooling plate according to any one of claims 1 to 3, further comprising a plurality of projections provided in the first type flow path or the second type flow path, the plurality of projections being spaced apart along the flow path.
18. 18. A battery pack comprising a plurality of cells and the liquid cooling plate according to any one of claims 1 to 17, wherein the plurality of cells are arranged on the flow channel plate, and each cell is opposite to the first type flow channel and the second type flow channel in the thickness direction of the liquid cooling plate.
19. 19. The battery pack of claim 18, wherein the plurality of cells comprises a plurality of rows of cells arranged side-by-side along the side-by-side arrangement, the plurality of cells in each row of cells being arranged along the flow path direction.

Description

Liquid cooling plate of battery pack and battery pack Technical Field The application relates to the technical field of energy storage, in particular to a liquid cooling plate of a battery pack and the battery pack. Background In the battery pack in the related art, due to unreasonable design of the bottom cooling plate, heat dissipation effects on a plurality of battery cells in the battery pack are different, the temperature uniformity of the battery cells is poor, and part of the battery cells are poor in safety and increase in thermal runaway risk due to poor heat dissipation effects. In order to improve the balance of heat dissipation of the bottom cooling plate to the plurality of battery cells, some bottom cooling plates in the related art can balance the heat dissipation of the plurality of battery cells, but the structure is too complex, and the practicability is not high. Disclosure of utility model The embodiment of the application provides a liquid cooling plate of a battery pack and the battery pack, which are used for solving the problems of complex liquid cooling plate and low practicality. In a first aspect, an embodiment of the present application provides a liquid cooling plate of a battery pack, where the liquid cooling plate includes a flow channel plate and a first drainage plate, a first type flow channel and a second type flow channel are disposed in the flow channel plate, the first type flow channel and the second type flow channel are communicated, the first type flow channel and the second type flow channel are arranged side by side and alternately arranged in a side by side direction, the flow channel directions of the first type flow channel and the second type flow channel are opposite, and the flow channel direction is a flow direction of a cooling liquid in the flow channel. The first type of runner includes a plurality of first runners, the second type of runner includes a plurality of second runners, a plurality of first runners and a plurality of second runners are arranged along the direction of arranging side by side in turn, the liquid cooling board still includes first drainage board, first drainage board sets up at the surface of runner board and with form the third runner between the surface of runner board, the third runner is used for communicating with inlet or the liquid outlet of liquid cooling board, the third runner is arranged along arranging the direction extension side by side, thereby the extending direction of third runner is roughly perpendicular with the direction of arranging side by side of a plurality of first runners. The surface of runner board is equipped with a plurality of first through-holes, and a plurality of first through-holes are used for intercommunication drainage inboard third runner and first class runner, and first class runner includes the first runner of a plurality of first runners that correspond with a plurality of first through-holes, and then communicates a plurality of first runners and third runner through a plurality of first through-holes. In this embodiment, because the setting of first drainage board for many first runners pass through the third runner can with liquid inlet or liquid outlet intercommunication of liquid cooling board, also can realize the parallelly connected setting of many first runners through first drainage board promptly, and need not many pipelines and communicate many first runners and liquid inlet or liquid outlet respectively, thereby can reduce the quantity that is used for realizing parallelly connected pipeline of many first runners, thereby can effectually reduce the pipeline connection complexity, reduce the degree of difficulty that many first runners and liquid inlet or liquid outlet are connected, with the structural complexity of reducing the liquid cooling board, simplify the structure of liquid cooling board, be favorable to the miniaturization of liquid cooling board, and then can effectively improve the practicality of liquid cooling board. In addition, in this embodiment, through the alternate arrangement of the first type of flow channels and the second type of flow channels, the electric core contacted with the liquid cooling plate can be contacted with the first type of flow channels and the second type of flow channels, but not only contacted with one of the first type of flow channels or the second type of flow channels, and the cooling liquid in the first type of flow channels and the second type of flow channels is usually larger and smaller, so that when the electric core contacted with the liquid cooling plate can be contacted with the first type of flow channels and the second type of flow channels, the temperature uniformity of each electric core can be effectively improved, and the situation that some electric cores cannot be effectively cooled is avoided. In some embodiments, the first drainage plate is laminated with the flow channel plate in the thickness direction of