CN-224232710-U - High-efficient liquid cooling box structure is used in heat dissipation of battery package

Abstract

The utility model relates to a high-efficiency liquid cooling box body structure for heat dissipation of a battery pack, which comprises a first box body, a second box body and a first connecting piece, wherein the first box body and the second box body are connected through the first connecting piece, the box body structure also comprises a third box body and a second connecting piece, and two ends of the third box body are respectively connected with the first box body through the second connecting piece. This novel collaborative design through first framework, second framework and third framework has constructed the multi-layer distributed runner system that forms by first runner, second runner, fourth runner and fifth runner, covers the multidirectional three-dimensional heat dissipation of box. Compared with the traditional single-layer liquid cooling plate, the novel box structure has the advantages that the cooling contact area is increased, the heat accumulation problem can be effectively solved, the influence of multiple thermal resistance interfaces is obviously reduced, and the heat transfer efficiency is improved.

Inventors

• ZHANG YUANJUN
• CHEN DAN

Assignees

• 江苏天钧精密技术有限公司

Dates

Publication Date

20260512

Application Date

20250414

Claims (10)

1. 1. The efficient liquid cooling box structure for the heat dissipation of the battery pack is characterized by comprising a first box body, a second box body and a first connecting piece, wherein the first box body is connected with the second box body through the first connecting piece, the box structure further comprises a third box body and a second connecting piece, and two ends of the third box body are connected with the first box body through the second connecting piece respectively.
2. 2. The efficient liquid-cooled case structure for heat dissipation of a battery pack according to claim 1, wherein the first and second cases are disposed at intervals and are enclosed to form a rectangular shape, and the case structure further comprises a bottom plate enclosed on one side of an end surface enclosed by the first and second cases.
3. 3. The efficient liquid-cooled case structure for heat dissipation of a battery pack as set forth in claim 2, wherein the third frame is perpendicular to the first frame and the third frame end is located at the center of the first frame in the longitudinal direction.
4. 4. The efficient liquid-cooled case structure for heat dissipation in a battery pack according to claim 3, wherein four first flow channels are provided in the first frame along a longitudinal direction, the four first flow channels being distributed in a first direction.
5. 5. The efficient liquid-cooled case structure for heat dissipation in a battery pack as set forth in claim 4, wherein four second flow channels are provided in the second case along the longitudinal direction, the four second flow channels being distributed in the first direction.
6. 6. The efficient liquid-cooled case structure for heat dissipation in a battery pack according to claim 5, wherein the first connecting member is provided in a right-angled shape, and a sealing member is provided on a surface of a junction with the end portions of the first frame and the second frame, and a third flow passage is formed in the first connecting member.
7. 7. The efficient liquid-cooled case structure for heat dissipation in a battery pack as set forth in claim 6, wherein said first flow path and said second flow path are both in communication through said third flow path in a first plane.
8. 8. The efficient liquid cooling box structure for heat dissipation of a battery pack according to claim 7, wherein a sealing plate is arranged in the third box body, four fourth flow channels and four fifth flow channels which are distributed along the first direction are respectively arranged on two sides of the sealing plate along the length direction in the third box body, the fourth flow channels are not communicated at one end close to the sealing plate, and the fifth flow channels are communicated at one end close to the sealing plate.
9. 9. The efficient liquid-cooled box structure for heat dissipation of a battery pack according to claim 8, further comprising a water inlet and outlet device connected to the third frame, wherein the water inlet and outlet device comprises a water inlet section and a water outlet section distributed along a first direction and is respectively connected to two fourth flow channels corresponding to the first direction.
10. 10. The efficient liquid-cooled box structure for heat dissipation of a battery pack as set forth in claim 9, wherein the second connecting member has four through openings, and the fourth flow passage and the fifth flow passage are correspondingly communicated with the first flow passage of the first frame body through the through openings on the first plane.

Description

High-efficient liquid cooling box structure is used in heat dissipation of battery package Technical Field The utility model relates to the technical field of battery thermal management, in particular to a high-efficiency liquid cooling box structure for heat dissipation of a battery pack. Background With the continuous improvement of the energy density and the charge-discharge power requirements of the power battery by the new energy automobile and the energy storage system, the heat accumulation problem of the lithium battery pack under the high-rate working condition is increasingly remarkable. Experimental data show that when the working temperature of the lithium battery exceeds 45 ℃, the cycle life of the lithium battery is exponentially attenuated, and if the local temperature reaches more than 80 ℃, potential safety hazards such as thermal runaway and the like can be caused. The existing battery pack liquid cooling system and the battery box body adopt split type design, the box body is not provided with liquid cooling or is only provided with a single-layer liquid cooling plate structure, only one side of the cooling radiating surface is cooled, multiple thermal resistance interfaces exist between a cooling medium runner and the battery module, the heat transfer efficiency is low, the central temperature of the box body is high, heat cannot be efficiently dissipated, and the heat management efficiency of the battery pack cannot meet the heat management requirement of a new generation of high-energy-density battery packs. And the split structure increases the volume and the weight of the system, which is contrary to the trend of lightweight design of the battery pack. Disclosure of utility model In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a high-efficiency liquid cooling box structure for heat dissipation of a battery pack, so as to solve one or more problems in the prior art. In order to achieve the above purpose, the technical scheme of the utility model is as follows: The high-efficiency liquid cooling box body structure for the heat dissipation of the battery pack comprises a first box body, a second box body and a first connecting piece, wherein the first box body and the second box body are connected through the first connecting piece, the box body structure further comprises a third box body and a second connecting piece, and two ends of the third box body are connected with the first box body through the second connecting piece respectively. Furthermore, the first frame body and the second frame body are arranged at intervals and are enclosed to form a rectangular shape, and the box body structure further comprises a bottom plate which is enclosed at one side of the end face enclosed by the first frame body and the second frame body. Further, the third frame is perpendicular to the first frame, and the end of the third frame is located at the center of the length direction of the first frame. Further, four first flow channels distributed in the first direction are arranged in the first frame along the length direction. Further, four second flow channels distributed in the first direction are arranged in the second frame body along the length direction. Further, the first connecting piece is arranged in a right angle shape, a sealing piece is arranged on the surface of the connecting part of the end parts of the first frame body and the second frame body, and a third flow passage is formed in the first connecting piece. Further, in the first plane, the first flow channel and the second flow channel are both communicated through the third flow channel. Further, a sealing plate is arranged in the third frame body, four fourth flow channels and four fifth flow channels which are distributed along the first direction are respectively arranged on two sides of the sealing plate along the length direction in the third frame body, the fourth flow channels are not communicated at one end close to the sealing plate, and the fifth flow channels are communicated at one end close to the sealing plate. Further, the box body structure further comprises a water inlet and outlet device, the water inlet and outlet device is connected to the third box body, and the water inlet and outlet device comprises a water inlet section and a water outlet section which are distributed along the first direction and are respectively connected to two fourth flow channels corresponding to the first direction. Further, the second connecting piece is provided with four through holes, and the fourth flow channel and the fifth flow channel are correspondingly communicated with the first flow channel of the first frame body which is close to the fourth flow channel through the through holes on the first plane. Compared with the prior art, the utility model has the following beneficial technical effects: The utility model discloses a through the collaborative desig