CN218069970U

CN218069970U - Heat management structure of soft package lithium ion battery module

Info

Publication number: CN218069970U
Application number: CN202221273690.4U
Authority: CN
Inventors: 高超; 王学宾; 宋海兰; 王乐; 刘辉; 胡春霞
Original assignee: Skycar Beijing Automotive Technology Co ltd
Current assignee: Skycar Beijing Automotive Technology Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-12-16
Anticipated expiration: 2032-05-25

Abstract

The invention provides a heat management structure of a soft package lithium ion battery module, which comprises a ladder-type liquid cooling plate and a cooling flow passage, wherein the cooling flow passage is provided with a water inlet and a water outlet, the cooling flow passage comprises a main pipe and an auxiliary pipe, a heating body is arranged in the main pipe, and the working voltage and the power of the heating body can be selected according to requirements. The U-shaped heat-conducting silica gel pads are laid on the auxiliary pipelines, and the shapes of the U-shaped heat-conducting silica gel pads correspond to the auxiliary pipelines one by one; the plastic insulating support is a plastic mould part and is erected on the U-shaped heat-conducting silica gel pad, and a series connection plate is arranged inside the plastic insulating support; the upper part of the battery cell is provided with a group of tabs, the tabs extend upwards and sequentially pass through the ladder-type liquid cooling plate, the U-shaped heat-conducting silica gel pad and the plastic insulating support to be bent and welded; the refrigeration heating face can be enlarged in this design for the face of weld of utmost point ear and the face of bending all are refrigeration heating face, and this design make full use of the usable floor area of utmost point ear and the high characteristic of metal coefficient of heat conductivity, make the refrigeration heating more high-efficient, and then make the battery adapt to various extreme operating modes better.

Description

Heat management structure of soft package lithium ion battery module

Technical Field

The invention relates to the technical field of new energy electric automobile accessories, in particular to a heat management structure of a soft package lithium ion battery module.

Background

The soft-package battery is widely applied to the field of new energy electric automobiles, and relates to wide and various types of automobiles, including but not limited to passenger cars, urban logistics vehicles, medium and heavy trucks, special cars and the like. At present, according to actual vehicle road test data of various vehicle types, the conditions that the battery is high in temperature or the heating rate does not meet the requirements can occur in the using process of a user of some vehicle types, and the user experience is greatly reduced. Because the environment that the user used varies, will inevitably meet extremely cold high temperature weather, can run for a long time even under extremely cold high temperature condition, this will require that thermal management system makes the battery reach reasonable temperature interval in the short time, can promote battery life-span and electrical property by a wide margin, otherwise can greatly reduced battery performance. Therefore, the problem that how to improve the refrigeration and heating effects through the optimization design of the thermal management structure is needed to be solved in the existing new energy industry can be known, and the novel thermal management structure which can enable the battery refrigeration and heating efficiency to be higher to adapt to extreme working conditions needs to be developed urgently.

Disclosure of Invention

The invention aims to: the invention aims to provide a heat management structure of a soft package lithium ion battery module aiming at the defects of the prior art, which makes full use of the usable area of a tab and the characteristic of high metal heat conductivity coefficient, so that the refrigeration and heating are more efficient, and the battery can better adapt to various extreme working conditions.

The technical scheme is as follows: the heat management structure of the soft package lithium ion battery module comprises a battery cell, a liquid cooling plate and an insulating pad, wherein the liquid cooling plate is laid on the upper surface of the battery cell, the insulating pad is laid on the upper surface of the liquid cooling plate, the liquid cooling plate is a ladder type liquid cooling plate, the insulating pad is a U-shaped heat conduction silica gel pad, and a plastic insulating support is supported on the U-shaped heat conduction silica gel pad;

the ladder-type liquid cooling plate comprises a set of cooling flow channels, the cooling flow channels are provided with water inlets and water outlets, the cooling flow channels comprise a main pipeline and an auxiliary pipeline, a heating body is arranged in the main pipeline, and the working voltage and the power of the heating body can be selected as required.

The U-shaped heat-conducting silica gel pad is laid on the auxiliary pipeline, and the shapes of the U-shaped heat-conducting silica gel pad correspond to the auxiliary pipeline one by one;

the plastic insulating support is a plastic mould piece and is erected on the U-shaped heat-conducting silica gel pad, and a series connection plate is arranged inside the plastic insulating support;

the upper part of the battery cell is provided with a group of tabs, the tabs extend upwards, and sequentially pass through the ladder-type liquid cooling plate, the U-shaped heat-conducting silica gel pad and the plastic insulating support to be bent and welded to form a bent surface and a welded surface; the refrigeration heating face can be enlarged in this design for the face of weld of utmost point ear and the face of bending all are refrigeration heating face, and this design make full use of the usable floor area of utmost point ear and the high characteristic of metal coefficient of heat conductivity, make the refrigeration heating more high-efficient, and then make the battery adapt to various extreme operating modes better.

Furthermore, the main pipeline comprises a first main pipeline and a second main pipeline which are arranged in parallel, a group of auxiliary pipelines are arranged between the first main pipeline and the second main pipeline, and the first main pipeline, the second main pipeline and the auxiliary pipelines form an integrally communicated inner cavity water channel; the secondary pipes are uniformly distributed and are in a serpentine shape. The ladder type liquid cooling plate is provided with a first water inlet and a first water outlet, and the diameter, the angle and the style of the ladder type liquid cooling plate are adjusted as required to distinguish the water inlet and the water outlet.

Further, the surface of the ladder-type liquid cooling plate is provided with an insulating layer.

Furthermore, the insulating layer is subjected to insulating treatment by adopting a PVD (physical vapor deposition) coating process, so that the safety is improved.

Furthermore, the material of the series plate is one or more of copper or steel.

Further, the thickness range of the U-shaped heat conduction silica gel pad is 0.5 to 2mm.

Furtherly, the material of ladder formula liquid cooling board is the aluminum alloy, and ladder formula, length can be according to laminate polymer battery module adaptation design.

Has the advantages that: compared with the prior art, the invention has the advantages that: make full use of the space of laminate polymer battery module, through the optimal design to the thermal management structure, make full use of the usable area of utmost point ear and the high characteristic of metal coefficient of heat conductivity to solve the problem that laminate polymer battery thermal management structure can not deal with various extreme operating modes among the prior art, make the refrigeration heating more high-efficient, also make the battery more can adapt to various complete car extreme operating modes.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic diagram of an internal cavity water channel;

fig. 5 is a schematic structural view of another view angle of the present invention, illustrating the tab bending surface and the welding surface.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

The heat management structure of the soft package lithium ion battery module shown in fig. 1-5 comprises a battery core 4, a liquid cooling plate and an insulating pad, wherein the liquid cooling plate is laid on the upper surface of the battery core, the insulating pad is laid on the upper surface of the liquid cooling plate, the liquid cooling plate is a ladder-type liquid cooling plate 1, the insulating pad is a U-shaped heat-conducting silica gel pad 3, and a plastic insulating support 2 is supported on the U-shaped heat-conducting silica gel pad 3;

the ladder-type liquid cooling plate 1 comprises a set of cooling flow channels, the cooling flow channels are provided with water inlets and water outlets, the cooling flow channels comprise a main pipeline and an auxiliary pipeline, a heating body is arranged in the main pipeline, and the working voltage and the power of the heating body can be selected as required. The main pipeline comprises a first main pipeline 1-1 and a second main pipeline 1-2 which are arranged in parallel, a group of auxiliary pipelines 1-3 are arranged between the first main pipeline 1-1 and the second main pipeline 1-2, and the first main pipeline 1-1, the second main pipeline 1-2 and the auxiliary pipelines form an integrally communicated inner cavity water channel 5, which is shown in figure 4; the secondary pipelines are uniformly distributed and are in a serpentine shape. The ladder type liquid cooling plate is provided with a first water inlet and a first water outlet, and the diameter, the angle and the style of the ladder type liquid cooling plate are adjusted as required to distinguish the water inlet and the water outlet. The surface of ladder formula liquid cooling board has the insulating layer, and the insulating layer adopts PVD cladding material technology to carry out insulation treatment, improves the security. Ladder formula liquid cooling plate 1's material is the aluminum alloy, ladder formula, and length can be according to laminate polymer battery module adaptation design.

The U-shaped heat-conducting silica gel pads 3 are laid on the auxiliary pipelines, and the shapes of the U-shaped heat-conducting silica gel pads correspond to the auxiliary pipelines one by one; the thickness range of the U-shaped heat-conducting silica gel pad 3 is 2mm.

The plastic insulating support 2 is a plastic mould part and is erected on the U-shaped heat-conducting silica gel pad 3, and a series connection plate is arranged inside the plastic insulating support 2; the material of the series plate is one or more of copper or steel.

The upper part of the battery cell 4 is provided with a group of tabs 6, the tabs 6 extend upwards, and sequentially pass through the ladder-type liquid cooling plate 1, the U-shaped heat-conducting silicon rubber pad 3 and the plastic insulating support 2 to be bent and welded to form a bent surface 7 and a welding surface 8; the refrigerating and heating surface can be enlarged in the design, so that the welding surface and the bending surface of the lug are refrigerating and heating surfaces, the usable area of the lug and the characteristic of high metal heat conductivity coefficient are fully utilized in the design, the refrigerating and heating are more efficient, and the battery can better adapt to various extreme working conditions.

The installation method comprises the following steps: the ladder-type liquid cooling plate is installed firstly, then the U-shaped heat-conducting silica gel pads are laid on the auxiliary pipelines of the ladder-type liquid cooling plate, the plastic insulating support is installed on the ladder-type liquid cooling plate, and the battery tabs are bent and welded after penetrating through the liquid cooling structure.

As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a soft packet of lithium ion battery module's thermal management structure, includes electric core (4), liquid cooling board, insulating pad, the liquid cooling board has been laid to the upper surface of electric core, the insulating pad, its characterized in that have been laid to the upper surface of liquid cooling board: the liquid cooling plate is a ladder type liquid cooling plate (1), the insulating pad is a U-shaped heat-conducting silica gel pad (3), and a plastic insulating support (2) is supported on the U-shaped heat-conducting silica gel pad (3);

the ladder-type liquid cooling plate (1) comprises a group of cooling flow channels, each cooling flow channel is provided with a water inlet and a water outlet, each cooling flow channel comprises a main pipeline and an auxiliary pipeline, and a heating body is arranged in each main pipeline;

the U-shaped heat-conducting silica gel pads (3) are laid on the auxiliary pipelines, and the shapes of the U-shaped heat-conducting silica gel pads correspond to the auxiliary pipelines one by one;

the plastic insulating support (2) is erected on the U-shaped heat-conducting silica gel pad (3), and a series connection plate is arranged inside the plastic insulating support (2);

the upper portion of electric core (4) has a set of utmost point ear (6), utmost point ear (6) upwards extend, pass in proper order ladder formula liquid cold drawing (1), U type heat conduction silica gel pad (3) and plastic insulation support (2) form face of bending (7) and face of weld (8).

2. The heat management structure of the soft package lithium ion battery module according to claim 1, characterized in that: the main pipeline comprises a first main pipeline (1-1) and a second main pipeline (1-2) which are arranged in parallel, a group of auxiliary pipelines (1-3) are arranged between the first main pipeline (1-1) and the second main pipeline (1-2), and the first main pipeline (1-1), the second main pipeline (1-2) and the auxiliary pipelines form an inner cavity water channel (5) which is integrally communicated.

3. The heat management structure of the soft package lithium ion battery module according to claim 1, characterized in that: the surface of the ladder-type liquid cooling plate is provided with an insulating layer.

4. The heat management structure of the soft package lithium ion battery module according to claim 3, characterized in that: and the insulating layer is subjected to insulating treatment by adopting a PVD (physical vapor deposition) plating process.

5. The heat management structure of the soft package lithium ion battery module according to claim 1, characterized in that: the series plates are made of one or more of copper or steel.

6. The heat management structure of the soft package lithium ion battery module according to claim 1, characterized in that: the thickness range of the U-shaped heat-conducting silica gel pad (3) is 0.5-2 mm.

7. The heat management structure of soft package lithium ion battery module of claim 1, characterized in that: the ladder type liquid cooling plate (1) is made of aluminum alloy.