CN209804740U

CN209804740U - Battery module

Info

Publication number: CN209804740U
Application number: CN201920499039.0U
Authority: CN
Inventors: 岳帅; 顾江娜; 许玉林; 李相哲
Original assignee: Suzhou Ankao Energy Co Ltd
Current assignee: Shanghai Qike Network Technology Co ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2019-12-17
Anticipated expiration: 2029-04-12

Abstract

The application discloses battery module, including a plurality of battery monomer, these battery monomer are the matrix form and distribute and form battery array, still include: the pulsating heat pipe comprises an evaporation end, a heat insulation end and a condensation end, wherein the evaporation end is attached to the single battery, and the heat insulation end and the condensation end are positioned on the outer side of the battery array; and the water cooling plate is attached to the condensation end of the pulsating heat pipe. The battery module has the advantages of high heat dissipation efficiency, high energy density, safety and reliability.

Description

Battery module

Technical Field

The present application relates to a battery module.

Background

the power battery is widely applied to the automobile industry, the main reason of the wide application is that the power battery plays an increasingly large role in energy conservation and environmental protection, and the power battery is popular in the market under the popularization of national policies. The power battery can produce a large amount of heat during operation, if can not in time be taken away, the heat will gather around the battery, leads to electric core temperature to rise, and then makes the battery performance descend, probably appears phenomenons such as weeping, gassing, smoking even, can cause thermal runaway consequences such as burning and explosion when serious.

The battery module is a core component for forming the automobile power battery, and the existing battery module adopts a plurality of heat transfer structural components, is complex in system, difficult to assemble and incapable of ensuring the production efficiency; a large amount of space is occupied, the components are heavy in mass, and the energy density of the whole system is influenced; at present, most of adopted heat-conducting media are conductors (aluminum sheets, copper sheets, aluminum extruded heat pipes or graphite sheets and the like), so that short-circuit accidents are easily caused; the heat conductivity coefficient of most non-conductive heat-conducting media is lower, so that the heat dissipation effect is greatly influenced; meanwhile, due to the requirement of a heat transfer structure, the installation position and the installation mode of the water cooling plate are limited.

Disclosure of Invention

The purpose of the application is: in order to solve the problems, the battery module which is high in heat dissipation efficiency, large in energy density, safe and reliable is provided.

The technical scheme of the application is as follows:

a battery module comprises a plurality of battery monomers which are distributed in a matrix shape to form a battery array, and also comprises:

A pulsating heat pipe, comprising: the evaporation end is arranged close to the battery monomer, and the heat insulation end and the condensation end are positioned on the outer side of the battery array; and

And the water cooling plate is attached to the condensation end of the pulsating heat pipe.

on the basis of the technical scheme, the application also comprises the following preferable scheme:

The water cooling plate is laid on the side portion of the battery array, and a heat conduction gasket made of insulating materials is clamped between the water cooling plate and the battery array.

and the condensation end of the pulsating heat pipe is fixedly bonded with the water cooling plate through heat conducting glue.

And the condensation end of the pulsating heat pipe is wound outside the water cooling plate.

And the evaporation end of the pulsating heat pipe is wound outside the battery monomer.

The body of the pulsating heat pipe is made of PTFE or PP materials.

At least one part of the evaporation end of the pulsating heat pipe is clamped between the battery cells and is subjected to compression deformation.

The pulsating heat pipe is fixedly adhered with the battery monomer on the surface of the battery array.

The battery clamp is characterized by further comprising a battery clamp provided with a plurality of battery inserting holes distributed in a matrix shape, and the battery single bodies are inserted into the battery inserting holes.

The battery monomer is a lithium ion battery with a cylindrical structure.

The application has the advantages that:

1. The heat dissipation performance is improved.

The tube body of the pulsating heat pipe is vacuumized and then filled with part of working medium, and bubble columns and liquid columns are formed in the tube and are arranged at intervals and in a randomly distributed state due to the small enough tube diameter. At the evaporation end, the working medium absorbs heat to generate bubbles, expands and boosts pressure quickly, and pushes the working medium to flow to the condensation end. Pressure imbalance exists at the cold end and the hot end, so that the working medium flows between the evaporation end and the condensation end in an oscillating mode, and heat transfer is achieved. The latent heat of vaporization of the working medium is large, and the heat of the evaporation end is rapidly taken away by the reciprocating vaporization and condensation, so that the heat conductivity coefficient of the pulsating heat pipe is very high. The heat source (battery monomer) and cold source (water-cooling board) are connected to the pulsation heat pipe, and the heat that battery monomer charge-discharge produced passes to the cold drawing rapidly along the pulsation heat pipe, is taken away by the inside coolant of water-cooling board, avoids the heat at electric core surface, the inside gathering of module, can realize filling soon, putting soon of battery module.

2. The energy density is improved.

the tube body of the pulsating heat pipe is a plastic tube with a hollow interior, so that the density is low and the material is light; the structure is simple, and the manufacturing process is mature; the occupied space is small, the installation is convenient, and the energy density of the battery pack is improved.

3. The safety and reliability are improved.

The pulsating heat pipe is made of a plastic pipe with good weather resistance, corrosion resistance and wear resistance, and working media which are nontoxic, harmless, non-combustible and non-corrosive are filled in the pulsating heat pipe. The insulation property is good, and short circuit can be prevented; the pipeline has certain elasticity, can effectively alleviate the impact of the hard object when vibrating or extruding, has greatly improved the safe and reliable performance of battery module.

4. The heat transfer is not influenced by gravity, the water cooling plate can be placed at will, and the spatial degree of freedom is larger.

pressure at the cold end and the hot end of the pulsating heat pipe is unbalanced, so that the working medium flows between the evaporation end and the condensation end in an oscillating mode. Compared with the conventional heat pipe, the pulsating heat pipe does not need a wick structure, the motion performance of the pulsating heat pipe is basically not influenced by the action of gravity, and the pulsating heat pipe can work in the environments of gravity field inversion, microgravity field, gravity field change and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present application;

Fig. 2 is a schematic cross-sectional view illustrating a battery module according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a pulsating heat pipe in an embodiment of the present application;

Wherein: 1-battery monomer, 2-pulsating heat pipe, 201-evaporation end, 202-heat insulation end, 203-condensation end, 3-water cooling plate, 4-battery clamp and 5-heat conduction gasket.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

fig. 1 shows the structure of a battery pack, which is formed by connecting two small battery modules (or battery modules) in series. The battery module in this embodiment also includes a battery holder 4 (or called a battery support), the battery holder 4 is provided with a plurality of battery insertion holes distributed in a matrix, end portions of a plurality of battery cells 1 are respectively inserted into the battery insertion holes of the battery holder 4, and the battery cells 1 are also distributed in a matrix under the restriction of the battery insertion holes, so as to form a battery array. The battery inserting holes of the battery clamp 4 are also provided with metal conducting strips, and the positive electrode end/negative electrode end of each battery cell in the battery array is in contact connection with the metal conducting strips (welding is needed if necessary), so that the parallel connection of each battery cell in the battery array is realized. The negative/positive terminals of the battery array in the other battery module are also inserted into the battery insertion holes of the battery holder 4 from the other side and are connected in contact with the metal conductive sheets (if necessary, welded), thereby achieving parallel connection of the two battery modules. The battery cell 1 is a lithium ion battery with a cylindrical structure.

Referring to fig. 1 to 3 again, the key improvement of the present embodiment is that the battery module is further configured with a pulsating heat pipe 2 and a water-cooling plate 3, wherein:

Pulsating heat pipe 2 includes an evaporator end 201, an adiabatic end 202, and a condenser end 203. The evaporation end 201 is arranged adjacent to the battery cell 1, and the insulation end 202 and the condensation end 203 are both located outside the battery array.

The water cooling plate 3 is arranged to abut against the condensation end 203 of the pulsating heat pipe 2.

The tube body of the pulsating heat pipe 2 is vacuumized and then filled with part of working medium, and bubble columns and liquid columns which are arranged at intervals and distributed randomly are formed in the tube due to the small enough tube diameter. At the evaporation end 201, the working medium absorbs heat to generate bubbles, expands and boosts pressure rapidly, and pushes the working medium to flow to the condensation end 203. The latent heat of vaporization of the working medium is large, the heat of the evaporation end is rapidly taken away to the condensation end 203 through reciprocating vaporization and condensation, and the heat is absorbed and taken out by the water cooling plate 3 which is arranged by being attached to the condensation end 203.

In this embodiment, the water-cooling plate 3 is laid on the side of the battery array, and a heat-conducting gasket 5 made of an insulating material is sandwiched between the water-cooling plate 3 and the battery array. In this way, the heat of the battery array can be transferred to the water cooling plate 3 through the heat conducting gasket 5 in addition to the pulsating heat pipe.

In order to increase the heat conduction area between the condensation end 203 of the pulsating heat pipe 2 and the water cooling plate 3, the condensation end 203 of the pulsating heat pipe 2 is wound outside the water cooling plate 3, and the condensation end 203 of the pulsating heat pipe is bonded and fixed with the water cooling plate 3 by using heat conduction glue, so that the two are prevented from being separated.

In order to facilitate the installation and arrangement of the evaporation end 201 of the pulsating heat pipe 2 in the battery array, the evaporation end 201 of the pulsating heat pipe 2 is embedded in a gap of the battery array and wound outside the battery cell 1 in the present embodiment.

The body of the pulsating heat pipe 2 is made of a plastic material with deformability, such as a PTFE material or a PP material, and has good weather resistance, corrosion resistance, wear resistance and insulating property. A part (or all) of the evaporation end 201 of the pulsating heat pipe 2 is clamped between the battery cells 1 in an interference manner, and a certain amount of compression deformation occurs under the clamping force. The compression deformation of the pulsating heat pipe 2 can reduce the thermal contact resistance between the pulsating heat pipe and the battery cell 1, and simultaneously, the pulsating heat pipe plays a role in buffering and protecting the battery cell 1 in the vibration or impact process.

In order to improve the structural stability of the pulsating heat pipe 2, the pulsating heat pipe 2 is fixed to the battery cell 1 on the surface of the battery array by gluing.

The two battery modules in fig. 1 share the same water cooling plate 3, and each battery module is provided with a plurality of pulsating heat pipes 2.

The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims

1. A battery module comprises a plurality of battery monomers (1), the battery monomers (1) are distributed in a matrix shape to form a battery array, and the battery module is characterized by further comprising:

A pulsating heat pipe (2) comprising an evaporation end (201) arranged against the battery cell (1) and an insulating end (202) and a condensation end (203) located outside the battery array; and

The water cooling plate (3) is attached to the condensation end (203) of the pulsating heat pipe (2).

2. The battery module according to claim 1, wherein the water-cooling plate (3) is laid on the side of the battery array, and a heat-conducting gasket (5) made of an insulating material is sandwiched between the water-cooling plate (3) and the battery array.

3. The battery module according to claim 1, wherein the condensation end (203) of the pulsating heat pipe (2) is fixed to the water-cooling plate (3) by bonding with a heat-conducting glue.

4. The battery module according to claim 1, wherein the condensation end (203) of the pulsating heat pipe (2) is wound outside the water-cooled plate (3).

5. The battery module according to claim 1, wherein the evaporation end (201) of the pulsating heat pipe (2) is wound outside the battery cell (1).

6. The battery module according to claim 1, wherein the tubular body of the pulsating heat pipe (2) is made of PTFE or PP.

7. The battery module according to claim 6, wherein at least a part of the evaporation end (201) of the pulsating heat pipe (2) is sandwiched between the battery cells (1) and is compressively deformed.

8. The battery module according to claim 1, wherein the pulsating heat pipe (2) is adhesively fixed with the battery cells (1) on the surface of the battery array.

9. the battery module according to claim 1, further comprising a battery holder (4) having a plurality of battery insertion holes formed therein in a matrix, wherein the battery cells (1) are inserted into the battery insertion holes.

10. the battery module according to claim 1, wherein the battery cells (1) are lithium ion batteries of cylindrical structure.