Search

CN-224217544-U - Heat radiation structure of soft package battery pack for energy storage or power and battery module

CN224217544UCN 224217544 UCN224217544 UCN 224217544UCN-224217544-U

Abstract

The utility model discloses a heat radiation structure of a soft package battery pack for energy storage or power and a battery module, which are provided with a central axial flow air channel, an even number of metal radiating fin assemblies and radiating fin assemblies, wherein the metal radiating fin assemblies are distributed along the central axial flow air channel, the metal radiating fin assemblies are composed of metal radiating fins, the large surfaces of the metal radiating fins are vertically arranged relative to a first direction, the radiating fin assemblies are arranged on one side close to the central axial flow air channel, the large surfaces of the radiating fin assemblies are vertical to the large surfaces of the metal radiating fins, the central axial flow air channel is formed by limiting the radiating fin assemblies, the radiating fin assemblies are connected with the metal radiating fin assemblies through heat conducting copper pipe assemblies, and a fan is arranged on the central axial flow air channel. Compared with the prior art, the solar cell module has the advantages of simple structure, ensuring the contact area of a heat dissipation medium and a battery pack, tightly connecting a heat dissipation structure, improving the space utilization rate, and solving the problems of insufficient heat dissipation safety redundancy, low heat conduction efficiency and overweight and overrun of the structural size.

Inventors

  • ZHANG ZHONGQING
  • ZHOU XINYU
  • GUO XUDONG
  • LIU ZHENPING
  • YU ZIKAI
  • WU BO
  • WANG YUANXI

Assignees

  • 天目湖先进储能技术研究院有限公司

Dates

Publication Date
20260508
Application Date
20250520

Claims (20)

  1. 1. A battery pack heat dissipation structure characterized by having a central axial flow duct (400) disposed along a first direction, and further comprising an even number of metal fin assemblies (300) and heat dissipation fin assemblies (100); The metal radiating fin assemblies (300) are distributed along the central axial flow air duct (400), each group of the metal radiating fin assemblies (300) consists of a plurality of metal radiating fins (310), each metal radiating fin (310) is provided with a metal radiating fin large surface (311), a metal radiating fin long side surface (312) and a metal radiating fin short side surface (313), the metal radiating fin large surface (311), the metal radiating fin long side surface (312) and the metal radiating fin short side surface (313) are respectively contacted with planes in three different directions of the battery cell (510), and the metal radiating fin large surfaces (311) in each group of the metal radiating fin assemblies (300) are vertically arranged relative to the first direction; The heat radiation fin assembly (100) is arranged on one side close to the central axial flow air duct (400), the large surface of the heat radiation fin assembly (100) is perpendicular to the large surface (311) of the metal heat radiation fin, and the central axial flow air duct (400) is formed by limiting the heat radiation fin assemblies (100) which are arranged oppositely; The radiating fin assembly (100) is connected with the metal radiating fin assembly (300) through a heat conducting copper pipe assembly (200); the central axial flow air duct (400) is also provided with a fan (410) for providing flow power along the first direction for the central axial flow air duct (400).
  2. 2. The battery pack heat dissipating structure of claim 1, wherein said metal fin assemblies (300) are symmetrically distributed along said central axial flow duct (400).
  3. 3. The heat dissipation structure of a battery pack according to claim 1, wherein the metal heat sink (310) is made of aluminum, aluminum alloy, copper, or copper alloy.
  4. 4. The battery pack heat dissipation structure as recited in claim 1, wherein the metal heat sink (310) is made of aluminum.
  5. 5. A battery pack heat dissipating structure according to claim 1, wherein the area of the large metal heat sink surface (311) has a characteristic of covering 50% -90% of the area of the large cell surface (511).
  6. 6. The heat dissipation structure of a battery pack according to claim 1, wherein the area of the large surface (311) of the metal heat sink has a characteristic of covering 85% of the area of the large surface (511) of the battery cell.
  7. 7. The battery pack heat dissipation structure as recited in claim 1, wherein the metal heat sink (310) has a thickness of 0.5-1.2 mm.
  8. 8. The battery pack heat dissipating structure of claim 1, wherein said metal heat sink (310) has a thickness of 1mm.
  9. 9. The heat dissipation structure of a battery pack according to claim 1, wherein the heat conductive copper pipe assembly (200) comprises at least one set of a first heat conductive copper pipe (210) and a second heat conductive copper pipe (220), the first heat conductive copper pipe (210) and the second heat conductive copper pipe (220) are perpendicular to each other, and contact with the long side (312) of the metal heat sink and the short side (313) of the metal heat sink, respectively, to form an L-shaped right angle.
  10. 10. The battery pack heat dissipation structure of claim 9, wherein the lengths of the first and second copper heat conduction tubes (210, 220) are 50% -100% of the side lengths of the long side (312) and short side (313) of the metal heat sink, respectively.
  11. 11. The battery pack heat dissipation structure of claim 8, wherein the lengths of the first and second copper heat conduction tubes (210, 220) are 80% of the side lengths of the long side (312) and short side (313) of the metal heat sink, respectively.
  12. 12. The heat dissipation structure of a battery pack according to claim 1, wherein the heat conductive copper pipe assembly (200) is a round copper pipe, a square copper pipe, or a flat copper pipe.
  13. 13. The battery pack heat dissipation structure as recited in claim 1, wherein the heat conductive copper tube assembly (200) is a hollow flat copper tube.
  14. 14. The heat dissipation structure of a battery pack according to claim 1, wherein the thickness of the heat conductive copper pipe assembly (200) is 3-7 mm.
  15. 15. The battery pack heat dissipation structure of claim 1, wherein the thickness of the heat conductive copper tube assembly (200) is 6mm.
  16. 16. The battery pack heat dissipation structure of claim 1, wherein the heat conductive copper tube assembly (200) has a wall thickness of 0.5-1 mm.
  17. 17. The battery pack heat dissipation structure of claim 1, wherein the heat conductive copper tube assembly (200) has a wall thickness of 0.8 mm.
  18. 18. The heat dissipation structure of the battery pack according to claim 1, wherein the hollow inner space of the heat conduction copper pipe assembly (200) contains a vacuum cooling liquid, and the vacuum cooling liquid comprises one of an ethylene glycol aqueous solution, a propylene glycol aqueous solution, mineral oil, a preservative, and a phase change material.
  19. 19. The heat dissipation structure of the battery pack according to claim 1, wherein the heat dissipation fin assembly (100) is composed of heat dissipation fins (110), a large surface of each heat dissipation fin (110) is of an upper wide and lower narrow structure, and the lower narrow structure (111) is formed by inward shrinkage of at least one side of the heat dissipation fin (110), so that a gap space of at least one side of the heat dissipation fin assembly (100) is formed, and the gap space provides an installation space for the fan (410).
  20. 20. The heat dissipation structure of a battery pack according to claim 1, wherein the heat dissipation fin assembly (100) is a plurality of T-shaped heat dissipation fins (110), and the lower portion of each T-shaped heat dissipation fin (110) is provided with a narrowing structure (111) at two sides, so that two fans (410) are disposed on a central axial flow duct (400) between a group of metal heat dissipation fin assemblies (300).

Description

Heat radiation structure of soft package battery pack for energy storage or power and battery module Technical Field The utility model relates to the technical field of heat dissipation of battery packs, in particular to a heat dissipation structure of a soft package battery pack for energy storage or power and a battery module. Background The soft package battery pack is a power source of a plurality of new energy devices, and has the advantages of small volume, high energy density, high safety, flexible design and the like, so that the soft package battery pack is well applied at present. The soft package battery has lighter weight, but after being grouped, the whole battery pack has larger weight and more complex structure because of the structural support and heat dissipation design requirements, and the soft package battery pack can generate higher heat during operation, and the heat is easier to accumulate because of the high energy density and the compact structure, so that the heat dissipation difficulty is obviously increased, and the heat dissipation management faces more challenges. The thermal management system design of the pouch battery is therefore critical. At present, a soft package battery pack for energy storage or power is commonly used for two heat dissipation modes, namely natural heat dissipation, namely heat dissipation silicone grease is filled between batteries of the soft package battery pack, a module is closely mounted on a metal shell, heat is conducted to the shell and then conducted to the outside air for heat dissipation in a natural convection and heat radiation mode, liquid cooling heat dissipation is carried out, a layer of heat dissipation structure with a flowable liquid pipeline is covered on the surface of the battery, and heat of the battery is taken away by using heat dissipation liquid flowing in the pipeline. However, in practical application, the battery pack system requiring multiple high-rate discharge such as a small and medium-sized unmanned aerial vehicle, a special electric carrier, a deep sea detector and the like has the problem of poor heat dissipation effect under various working conditions such as the acceleration working condition of a traversing machine, the load departure of a plant protection unmanned aerial vehicle and the like, the problem that local overheating is easy to occur due to poor heat dissipation effect of natural heat dissipation, the risk of thermal runaway is increased, the problem of long-time high-rate charge and discharge is unfavorable, the problem that liquid cooling heat dissipation consumes the internal energy of a battery is excessively high, the cost is excessively high, and the battery pack system has the overweight and overrun structure size, the complex pipeline structure and the problem that the battery pack is unfavorable for being transplanted to a small-sized energy storage or power soft package battery pack and the like. In view of this, we need to study a heat dissipation structure and a battery module of a soft package battery pack for energy storage or power, which has simple structure, low cost, uniform heat dissipation and prolonged service life of the battery. Disclosure of utility model The utility model aims to solve the problems of complex structure, low heat dissipation efficiency and high heat dissipation cost of the soft package battery pack for energy storage or power in the prior art, and at present, the soft package battery pack commonly uses two heat dissipation modes, namely natural heat dissipation and liquid cooling heat dissipation, but has the problems of insufficient safety redundancy of natural heat dissipation, low heat conduction efficiency, overhigh liquid cooling heat dissipation cost and overweight and overrun of structural size. Therefore, the heat dissipation efficiency is improved by tightly attaching and combining the large-area coverage mode, the heat dissipation structure does not exceed the space of 6% inside the battery pack, the problems of insufficient safety redundancy, low heat conduction efficiency, complex structure and high cost are solved, and the heat dissipation structure and the battery module of the soft-package battery pack for energy storage or power, which are simple in structure, low in cost, uniform in heat dissipation and long in service life of the battery, are researched. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a heat radiation structure of a soft package battery pack for energy storage or power, which is provided with a central axial flow air duct arranged along a first direction, and also comprises an even number of metal heat radiation fin assemblies and heat radiation fin assemblies; The metal radiating fin assemblies are distributed along the central axial flow air duct, each group of metal radiating fin assemblies consists of a plurality of metal radiating fins