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CN-224217541-U - Cooling assembly, battery pack and energy storage device

CN224217541UCN 224217541 UCN224217541 UCN 224217541UCN-224217541-U

Abstract

The utility model relates to the technical field of energy storage, in particular to a cooling assembly, a battery pack and an energy storage device, and aims to solve the problems of large temperature difference between a liquid inlet side and a liquid outlet side of the battery cooling assembly and poor temperature uniformity. To this end, the cooling module of the present utility model includes a heat exchange tube group and a first header. The heat exchange tube group comprises a plurality of heat exchange tubes, wherein a first flow passage and a second flow passage which are not communicated with each other are arranged in the first collecting tube, a water filling port and a first communication port which is communicated with one end of the plurality of heat exchange tubes in a one-to-one correspondence manner are arranged on the first flow passage, and a water outlet and a second communication port which is communicated with the other end of the plurality of heat exchange tubes in a one-to-one correspondence manner are arranged on the second flow passage. Through set up first runner and the second runner that each other does not communicate in single pressure manifold, eliminate the uneven problem that the flow distribution that parallel pipeline led to and parallel pipeline business turn over liquid side difference in temperature is big for the temperature variation of coolant liquid in each heat exchange tube is more unanimous, makes each position temperature distribution of battery more balanced.

Inventors

  • XU FAN
  • GAO CHENGQUAN
  • YANG ZHE
  • ZHANG SHUAI

Assignees

  • 江苏天合储能有限公司

Dates

Publication Date
20260508
Application Date
20250513

Claims (20)

  1. 1. A cooling assembly, the cooling assembly comprising: A heat exchange tube group (1), the heat exchange tube group (1) including a plurality of heat exchange tubes (11); The heat exchange device comprises a first collecting pipe (2), wherein the first collecting pipe (2) is internally provided with a first flow passage (21) and a second flow passage (22) which are not communicated with each other, the first flow passage (21) is provided with a water filling port (211) and a plurality of first communication ports (212) which are communicated with one ends of the heat exchange pipes (11) in a one-to-one correspondence manner, and the second flow passage (22) is provided with a water discharging port (221) and a plurality of second communication ports (222) which are communicated with the other ends of the heat exchange pipes (11) in a one-to-one correspondence manner.
  2. 2. The cooling assembly according to claim 1, wherein the first header (2) has a tubular structure and is sealed at both ends, a first partition (23) is provided in the first header (2), and the first partition (23) partitions a space in the first header (2) to form the first flow channel (21) and the second flow channel (22) which are distributed up and down.
  3. 3. A cooling assembly according to claim 2, characterized in that the first partition (23) is arranged horizontally in the first header (2).
  4. 4. A cooling module according to claim 2, wherein the first partition (23) divides the space in the first header (2) by equal volume to equalize the volumes of the first flow channel (21) and the second flow channel (22).
  5. 5. The cooling assembly according to claim 2, wherein the first communication port (212) and the second communication port (222) are both open on one side of the first header (2), and the water injection port (211) and the water discharge port (221) are both open on the other side of the first header (2) opposite to the first communication port (212).
  6. 6. The cooling assembly according to claim 5, wherein a first cavity (24) and a second cavity (25) are sequentially formed in the first collecting pipe (2) along the length direction of the first collecting pipe (2) near one side of the water injection port (211), the first cavity (24) is respectively communicated with the water injection port (211) and the first runner (21), and the second cavity (25) is respectively communicated with the water discharge port (221) and the second runner (22).
  7. 7. A cooling module according to claim 6, characterized in that a second partition (26) is provided in the first header (2), the second partition (26) separating the first flow channel (21) and the second flow channel (22) from the first cavity (24) and the second cavity (25).
  8. 8. A cooling module according to claim 7, wherein the second partition (26) is provided with two through holes at a distance from each other, the first flow passage (21) communicates with the first cavity (24) through one of the through holes, and the second flow passage (22) communicates with the second cavity (25) through the other through hole.
  9. 9. The cooling assembly according to claim 7, characterized in that the second partition (26) is arranged vertically in the first header (2).
  10. 10. The cooling assembly according to claim 6, characterized in that a third partition (27) is also provided in the first header (2), the first cavity (24) and the second cavity (25) being separated by the third partition (27).
  11. 11. The cooling assembly according to claim 10, characterized in that the third partition (27) is arranged vertically in the first header (2).
  12. 12. The cooling assembly according to claim 10, wherein the third partition (27) equally separates the first cavity (24) from the second cavity (25).
  13. 13. The cooling assembly according to claim 6, characterized in that the water injection port (211) and the water discharge port (221) are located at the same height position of the first collecting pipe (2), and/or that the water injection port (211) and the water discharge port (221) have the same caliber.
  14. 14. A cooling module according to claim 6, characterized in that the first header (2) is a square tube.
  15. 15. The cooling assembly according to claim 1, wherein each heat exchange tube (11) comprises two tube body parts (111) arranged in the length direction of the first header (2), one tube body part (111) is communicated with the first communication port (212), the other tube body part (111) is communicated with the second communication port (222), and the directions of cooling liquid in the adjacent two tube body parts (111) are opposite.
  16. 16. The cooling assembly according to claim 15, wherein the heat exchange tube (11) is a U-shaped tube, the heat exchange tube (11) further comprises a bent tube portion (112), and one end of the two tube body portions (111) away from the first collecting pipe (2) is respectively communicated with two ends of the bent tube portion (112).
  17. 17. A cooling module according to claim 16, wherein a plurality of said heat exchange tubes (11) are nested within each other.
  18. 18. The cooling assembly according to claim 16, wherein the heat exchange tube groups (1) are provided with a plurality of groups, the heat exchange tube groups (1) are sequentially arranged along the length direction of the first collecting pipe (2), and the directions of cooling liquid in two tube body parts (111) which are adjacent to each other at the outermost sides of two adjacent heat exchange tube groups (1) are opposite.
  19. 19. The cooling assembly according to claim 15, further comprising a second header (3), the second header (3) being spaced from the first header (2), the second header (3) having a return chamber (31), both ends of the tube body (111) remote from the first header (2) being in communication with the return chamber (31).
  20. 20. The cooling assembly according to claim 19, wherein a plurality of the return cavities (31) are sequentially arranged along the length direction of the second collecting pipe (3), and a plurality of the return cavities (31) are in one-to-one correspondence with a plurality of the heat exchange pipes (11).

Description

Cooling assembly, battery pack and energy storage device Technical Field The utility model relates to the technical field of energy storage, and particularly provides a cooling assembly, a battery pack and an energy storage device. Background With the rapid development of new energy industry, the battery energy storage system is increasingly widely applied in the fields of electric automobiles, power grid peak shaving and the like. However, the battery module generates a large amount of heat during the working process, if the heat dissipation is not timely, the problems of local overheating, uneven temperature distribution and the like are easily caused, and further the risks of battery performance attenuation, cycle life shortening and even thermal runaway are caused. Therefore, an efficient and reliable cooling system becomes a key technology for guaranteeing safe and stable operation of the battery pack. Conventional battery cooling schemes mostly employ side-by-side harmonica flow channel designs to achieve coolant flow and heat exchange, however, such conventional designs suffer from significant drawbacks. On one hand, all the parallel harmonica pipe flow passages are used for liquid from the same side, and the cooling liquid flows out from the other side after fully exchanging heat through the modules, so that the overall temperature of the liquid inlet side and the liquid outlet side is greatly deviated, and on the other hand, in the parallel harmonica pipes, the longer the distance from the liquid inlet is, the longer the travel of the cooling liquid is, the flow resistance is correspondingly increased, and the flow is correspondingly reduced. The reduced flow directly results in a poor cooling effect, further exacerbating the difference in cooling effect between the individual harmonica tubes. Accordingly, there is a need in the art for a new solution to the above-mentioned problems. Disclosure of utility model The utility model aims to solve the technical problems, namely the problems of large temperature difference between the liquid inlet side and the liquid outlet side and poor temperature uniformity of the traditional battery cooling assembly. In a first aspect, the present utility model provides a cooling assembly. The cooling assembly comprises a heat exchange tube group and a first collecting pipe, wherein the heat exchange tube group comprises a plurality of heat exchange tubes, a first flow passage and a second flow passage which are not communicated with each other are arranged in the first collecting pipe, a water filling port and first communication ports which are communicated with one ends of the plurality of heat exchange tubes in a one-to-one correspondence manner are formed in the first flow passage, and a water discharging port and second communication ports which are communicated with the other ends of the plurality of heat exchange tubes in a one-to-one correspondence manner are formed in the second flow passage. In the preferred technical scheme of the cooling assembly, the first collecting pipe is of a tubular structure, two ends of the first collecting pipe are sealed, a horizontal partition plate is arranged in the first collecting pipe, and the space in the first collecting pipe is divided by the horizontal partition plate to form the first flow channel and the second flow channel which are distributed up and down. In a preferred embodiment of the above cooling module, the first partition is horizontally disposed in the first header. In a preferred embodiment of the above cooling module, the first partition plate divides the space in the first header by equal volume so that the volumes of the first flow channel and the second flow channel are equal. In the preferred technical scheme of the cooling assembly, the first communication port and the second communication port are both arranged on one side of the first collecting pipe, and the water filling port and the water discharging port are both arranged on the other side of the first collecting pipe opposite to the first communication port. In the preferred technical scheme of the cooling assembly, one side close to the water injection port is provided with a first cavity and a second cavity in sequence along the length direction of the first collecting pipe, the first cavity is respectively communicated with the water injection port and the first flow channel, and the second cavity is respectively communicated with the water outlet and the second flow channel. In a preferred embodiment of the above cooling module, a second partition is disposed in the first header, and the second partition separates the first flow passage and the second flow passage from the first cavity and the second cavity. In a preferred embodiment of the above cooling assembly, the second partition is provided with two through holes at intervals, the first flow passage communicates with the first cavity through one of the through holes, and the second