CN-121983700-A - Three-dimensional hybrid heat exchange structure of battery module

CN121983700ACN 121983700 ACN121983700 ACN 121983700ACN-121983700-A

Abstract

The invention discloses a three-dimensional mixed heat exchange structure of a battery module, which comprises a battery cell group formed by arranging a plurality of battery cells, a connecting busbar assembly, a liquid cooling heat exchange assembly and an air cooling auxiliary assembly, wherein the liquid cooling heat exchange assembly comprises a top heat exchange member and a lateral heat exchange member, the liquid cooling heat exchange assembly further comprises a liquid supply converging structure and a liquid return converging structure, the top heat exchange member and the lateral heat exchange member are respectively provided with an internal flow passage for fluid heat exchange, the internal flow passages of the top heat exchange member and the internal flow passages of the lateral heat exchange member are respectively communicated with the liquid supply converging structure and the liquid return converging structure so that heat exchange fluid can respectively flow through the top heat exchange member and the lateral heat exchange member in the same liquid supply and return system, the air cooling auxiliary assembly comprises an air duct and an axial flow fan, and the air duct is arranged along at least one narrow surface of the battery cell group, and the axial flow fan is used for driving air flow to flow in the air duct to flow so as to exchange heat with the narrow surface. The technical scheme of the invention aims to realize compatibility and uniform temperature of cooling and heating under different temperature environments.

Inventors

XIAO JIANRONG
JIANG ZHIGANG
KE ZHIMING

Assignees

深圳市拓湃新能源科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251230

Claims (8)

1. The three-dimensional mixed heat exchange structure of the battery module is characterized by comprising a battery cell group formed by arranging a plurality of battery cells, a connecting busbar assembly, a liquid cooling heat exchange assembly and an air cooling auxiliary assembly; The battery cell group is provided with two opposite large sides and two opposite narrow sides, each battery cell is provided with a pole, and the connecting busbar assembly is used for being electrically connected with the pole; The liquid cooling heat exchange assembly comprises a top heat exchange member and a lateral heat exchange member, wherein the top heat exchange member is arranged in the area where the polar column and the connecting busbar assembly are positioned and forms thermal coupling with the connecting busbar assembly and the polar column through an insulating heat conduction interface; The liquid cooling heat exchange assembly further comprises a liquid supply converging structure and a liquid return converging structure, the top heat exchange member and the lateral heat exchange member are respectively provided with an internal flow passage for fluid heat exchange, and the internal flow passages of the top heat exchange member and the lateral heat exchange member are communicated with the liquid supply converging structure and the liquid return converging structure so that heat exchange fluid can respectively flow through the top heat exchange member and the lateral heat exchange member in the same liquid supply and return system; The air cooling auxiliary assembly comprises an air duct and an axial flow fan, wherein the air duct is arranged along at least one narrow surface of the battery cell group, and the axial flow fan is used for driving airflow to flow in the air duct so as to exchange heat with the narrow surface.
2. The three-dimensional hybrid heat exchange structure of a battery module according to claim 1, wherein the top heat exchange member comprises an upper soaking plate and a heat exchange pipeline arranged inside the upper soaking plate, and the heat exchange pipeline forms a foldback flow path along the extending direction of the connecting busbar assembly.
3. The solid mixed heat exchange structure of the battery module according to claim 2, wherein the insulating heat conduction interface is disposed between the upper soaking plate and the connection busbar assembly, and the insulating heat conduction interface comprises an insulating heat conduction gasket or an insulating heat conduction glue layer to form a surface contact heat conduction path while achieving electrical isolation.
4. The three-dimensional hybrid heat exchange structure of a battery module according to claim 2 or 3, wherein the lateral heat exchange member comprises at least one group of vertical heat exchange plates which are arranged at intervals along the arrangement direction of the battery cell group and respectively abut against the large faces of the corresponding battery cell sides; And each vertical heat exchange plate is internally provided with an in-plate flow passage, and the liquid inlet end and the liquid outlet end of the in-plate flow passage are respectively positioned at the same end or opposite ends of the vertical heat exchange plates.
5. The three-dimensional hybrid heat exchange structure of a battery module according to claim 4, wherein the liquid supply converging structure and the liquid return converging structure respectively comprise a common water inlet pipe and a common water outlet pipe, and the heat exchange pipeline and the in-plate flow channels of the vertical heat exchange plates are respectively communicated with the common water inlet pipe and the common water outlet pipe through water inlet and outlet branch pipes so as to form a common-pipe parallel water transport structure of a top heat exchange member and a lateral heat exchange member.
6. The three-dimensional hybrid heat exchange structure of a battery module according to claim 5, wherein the common water inlet pipe and the common water outlet pipe are arranged to extend along the side edges of the battery cell group, and the interfaces of the water inlet and outlet branch pipes are distributed along the arrangement direction of the battery cell group.
7. The three-dimensional mixed heat exchange structure of a battery module according to claim 4, wherein the vertical heat exchange plate is provided with a first liquid inlet and a first liquid outlet for cooling working conditions and a second liquid inlet and a second liquid outlet for heating working conditions, and the communication directions of the second liquid inlet and the second liquid outlet in a water carrying flow channel are opposite relative to the first liquid inlet and the first liquid outlet, so that heating medium flows reversely in the plate flow channel and heating uniformity is improved.
8. The three-dimensional hybrid heat exchange structure of a battery module according to any one of claims 1 to 7, wherein the air duct comprises an air duct cavity extending along at least one narrow side of the battery cell group, and an air inlet and an air outlet communicated with the air duct cavity, and the axial flow fan is installed at the air inlet to drive air flow to form a covered heat exchange air flow channel along the narrow side.

Description

Three-dimensional hybrid heat exchange structure of battery module Technical Field The invention relates to the technical field of heat exchange structures of battery modules, in particular to a three-dimensional hybrid heat exchange structure of a battery module. Background The cell module of the existing power battery or energy storage battery can generate obvious heat under the working conditions of high-rate charge and discharge, quick charge and high ambient temperature, and the temperature rising control usually depends on a thermal management structure such as air cooling or liquid cooling. The air cooling scheme is simple in structure and low in cost, the heat exchange capacity is easily limited by the environment temperature, the airflow structure and the installation space, the heat accumulation inside the battery cell is difficult to effectively inhibit in the scene of large heat load or large working condition fluctuation, the liquid cooling scheme can improve the heat exchange capacity, the traditional liquid cooling plates are arranged at the bottom or partial side surfaces of the battery cell, the heat exchange path is mainly arranged on the large surface or the bottom of the battery cell, the polar column and the connecting busbar region which are easier to form a high-temperature point in the battery cell module, and the partial high-impedance heating position at the joint of the polar column and the busbar is lack of a direct and short-path heat coupling heat exchange structure, so that the hot point temperature is difficult to drop in time, the temperature difference between the battery cells and the inside the battery cell is further aggravated, and the consistency, the service life and the safety margin of the module are influenced. In addition, the battery system has the problems of reduced available power, limited charge and discharge capacity and the like in a low-temperature environment, and the battery core is often required to be preheated or insulated in engineering. The existing preheating means generally needs to additionally arrange a heating plate, a heating film or an independent heating loop, the assembly space and wiring are complex, heat is difficult to quickly and uniformly transfer to the inside of the battery cell, and the conditions of slow temperature rise, uneven temperature distribution or higher energy consumption are easy to occur. Disclosure of Invention The invention mainly aims to provide a three-dimensional hybrid heat exchange structure of a battery module, which aims to solve the technical problems that in the prior art, high-efficiency heat exchange of bus bars/pole hot spots, rapid derivation of large-surface heat accumulation of a battery cell and compensation of a narrow-surface heat dissipation short plate are difficult to realize compatibility of cooling and heating and a uniform temperature effect under different environmental temperatures are difficult to realize in the same module structure. In order to achieve the above purpose, the three-dimensional hybrid heat exchange structure of the battery module provided by the invention comprises a battery cell group formed by arranging a plurality of battery cells, a connecting busbar assembly, a liquid cooling heat exchange assembly and an air cooling auxiliary assembly; The battery cell group is provided with two opposite large sides and two opposite narrow sides, each battery cell is provided with a pole, and the connecting busbar assembly is used for being electrically connected with the pole; The liquid cooling heat exchange assembly comprises a top heat exchange member and a lateral heat exchange member, wherein the top heat exchange member is arranged in the area where the polar column and the connecting busbar assembly are positioned and forms thermal coupling with the connecting busbar assembly and the polar column through an insulating heat conduction interface; The liquid cooling heat exchange assembly further comprises a liquid supply converging structure and a liquid return converging structure, the top heat exchange member and the lateral heat exchange member are respectively provided with an internal flow passage for fluid heat exchange, and the internal flow passages of the top heat exchange member and the lateral heat exchange member are communicated with the liquid supply converging structure and the liquid return converging structure so that heat exchange fluid can respectively flow through the top heat exchange member and the lateral heat exchange member in the same liquid supply and return system; The air cooling auxiliary assembly comprises an air duct and an axial flow fan, wherein the air duct is arranged along at least one narrow surface of the battery cell group, and the axial flow fan is used for driving airflow to flow in the air duct so as to exchange heat with the narrow surface. According to the technical scheme, the hot spot connecting the busbar assembly and the pole colum