CN210692611U

CN210692611U - Battery pack

Info

Publication number: CN210692611U
Application number: CN201921318534.3U
Authority: CN
Inventors: 顾江娜; 邓励强; 岳帅; 李勇; 许玉林; 李相哲
Original assignee: Suzhou Ankao Energy Co Ltd
Current assignee: Suzhou Ankao Energy Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-06-05
Anticipated expiration: 2029-08-14

Abstract

The application discloses battery pack, including the battery box and accept in a plurality of battery module in the battery box, the outline of battery module is the cuboid structure, each the battery module is in the horizontal direction, along the width of cuboid arranges in proper order, every the last top surface of battery module and lower bottom surface level respectively lay the last water-cooling board of a rectangular plate structure and the lower water-cooling board of a rectangular plate structure, every all insert in the battery module establish with this battery module in the battery monomer heat conduction contact, and with go up water-cooling board with the soaking board that lower water-cooling board heat conduction is connected. The battery pack has the advantages of strong temperature regulation capability, high shock resistance and convenient maintenance.

Description

Battery pack

Technical Field

The present application relates to a battery pack.

Background

The battery pack, particularly a power battery pack for an electric vehicle, is mainly composed of a battery box and a plurality of battery modules accommodated in the battery box. In order to prevent the battery module from being heated too high to cause thermal runaway or avoid the battery module from being heated too low to cause electrical performance reduction, a water cooling plate is usually arranged in the battery box to absorb the heat of the battery module or heat the battery module. However, in the conventional battery pack, the plurality of battery modules share the same water cooling plate, and the surfaces of the plurality of battery modules are difficult to be flush, so that the contact between the water cooling plate and the battery modules is poor, the heat transfer rate is low, the water cooling plate can be installed only after the positions of the battery modules are installed and fixed, and a single battery module cannot be taken out of the water cooling plate and taken out of the battery box for maintenance; in addition, the same water-cooling plate needs to be selectively filled with cold water or hot water according to the ambient temperature, so that the heat absorption plate is used for absorbing heat of the battery module and heating the battery module, and the use is inconvenient.

Disclosure of Invention

The purpose of the application is: in order to solve the problems, the battery pack which is strong in temperature regulation capacity, high in shock resistance and convenient to overhaul and maintain is provided.

The technical scheme of the application is as follows:

a battery pack, comprising:

a battery case, and

a plurality of battery modules accommodated in the battery box,

the outline of battery module is the cuboid structure, each the battery module is in the horizontal direction, along the width of cuboid arranges in proper order, every the last top surface of battery module and lower bottom surface level respectively lay the last water-chilling plate of a rectangular plate structure and the lower water-chilling plate of a rectangular plate structure, every all insert in the battery module establish with this battery module in the battery monomer heat conduction contact, and with go up water-chilling plate with the soaking plate that water-chilling plate heat conduction is connected down.

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

the vapor chamber is internally sealed with phase-change liquid.

The phase-change liquid is electronic fluorinated liquid.

The battery box is internally provided with:

a cold water pipe communicated with all the water cooling runners in the upper water cooling plate,

a hot water pipe communicated with all the water cooling channels in the lower water cooling plate, and

the water return pipes are communicated with the water cooling runners in all the upper water cooling plates and all the lower water cooling plates;

the cold water pipe and the hot water pipe are provided with water supply ends extending out of the battery box, and the water return pipe is provided with a water outlet end extending out of the battery box.

The cold water pipe and the hot water pipe share the same water supply port, and the water supply port is simultaneously connected with the cold water pipe and the hot water pipe through a three-way valve.

All the lower water cooling plates are arranged on the same plane.

Go up the water cooling board with press from both sides between the battery module and establish the silica gel pad of horizontal arrangement, lower water cooling board with press from both sides between the battery module and establish the silica gel pad of horizontal arrangement.

The soaking plate is of an aluminum extruded structure.

And each battery module is fixedly connected with the upper water cooling plate on the upper top surface and the lower water cooling plate on the lower bottom surface.

This application is broken up into parts with the bold water-cooling board in traditional battery package, and the bottom and the top of every battery module dispose respectively and are used for heating and be used for endothermic water-cooling board, have following advantage:

1. the large-size water cooling plates with high requirements on the flatness are small-size water cooling plates respectively, the requirements on the flatness of the water cooling plates are reduced, the effective heat transfer area of each battery module and the water cooling plates is increased, and the water cooling plates can adjust the temperature of each battery module more quickly.

2. Every battery module and two water-cooling board fixed connection that correspond, when certain battery module or water-cooling board trouble in the battery package, can wholly demolish the maintenance with the combination of the battery module that corresponds and water-cooling board, the convenient maintenance.

3. The size of a single water cooling plate is small, so that the size of the water cooling plate processing equipment can be greatly reduced, and the processing is convenient.

4. The vehicle that disposes this battery package is accelerating, slow down, emergency braking or when jolting the road surface and going, inevitably has some relative displacement between battery module and the battery box, and relative displacement between the battery module, when beating inconsistent, the vibration impact only acts on each modular water-cooling board, compares with monoblock jumbo size water-cooling board, and water-cooling board's shock resistance is strong in this application, and is safe controllable more.

5. A water-cooling board for heating up arranges in battery module below for battery module top is arranged in to the water-cooling board of endothermic cooling, and cartridge and the samming board that is connected with water-cooling board heat conduction from top to bottom and is packaged with phase transition liquid in the battery module have promoted the heat transfer rate of each position battery monomer of battery module and water-cooling board greatly, have promoted the free temperature homogeneity of individual battery in the battery module.

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 an exploded view of a battery pack in an embodiment of the present application;

fig. 2 is a schematic view of the internal structure of a battery pack according to an embodiment of the present application;

fig. 3 is a schematic structural view of the battery module in fig. 2 after being removed;

fig. 4 is a schematic view illustrating a matching structure of a soaking plate and a single battery in a single battery module according to an embodiment of the present disclosure;

wherein: 1-battery box, 101-box body, 102-box cover, 2-battery module, 201-battery monomer, 3-upper water cooling plate, 4-lower water cooling plate, 5-soaking plate, 6-cold water pipe, 7-hot water pipe, 8-water return pipe and 9-three-way valve.

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 to 4 show an embodiment of a battery pack of the present application, which includes a battery box 1 and a plurality of (specifically, 8) battery modules 2 accommodated in the battery box. The battery box 1 is composed of a box body 101 with an open top and a box cover 102 closed at the open top, and the battery module 2 is mainly composed of a plurality of cylindrical battery cells 201.

The key improvement of the embodiment is as follows: the outline of aforementioned battery module 2 is the cuboid structure, each battery module 2 is on the horizontal direction, arrange in proper order along the width of cuboid, the last top surface of every battery module 2 and lower bottom surface level respectively lay the last water-cooling board 3 of a rectangular plate structure and the lower water-cooling board 4 of a rectangular plate structure, all insert in every battery module 2 establish with the interior battery monomer 201 heat conduction contact of this battery module 2, and with the aforesaid last water-cooling board 3 with the soaking board 5 of the heat conduction connection of lower water-cooling board 4.

The battery box of the battery pack is internally provided with 8 battery modules 2, and the upper water cooling plate 3 and the lower water cooling plate 4 are respectively provided with 8 corresponding modules.

The vapor chamber 5 is an aluminum extrusion structure, and a phase-change liquid is encapsulated therein, wherein the phase-change liquid is an electronic fluorination liquid.

A cold water pipe 6, a hot water pipe 7 and a water return pipe 8 are arranged in the battery box 1. Wherein: the cold water pipe 6 is communicated with all the water cooling runners in the upper water cooling plate 3, so that the upper water cooling plate 3 can absorb heat and cool the battery module 2. The hot water pipe 7 is communicated with all the water cooling channels in the lower water cooling plate 4, so that the lower water cooling plate 7 can heat and raise the temperature of the battery module. The water return pipe 8 is communicated with all the water cooling channels in the upper water cooling plate 3 and all the lower water cooling plates 4, so that cold water in the upper water cooling plate 3 or heat in the lower water cooling plates 4 is led out by the water return pipe 8. The cold water pipe 6 and the hot water pipe 7 are both provided with water supply ends extending out of the battery box 1, and the water return pipe 8 is provided with a water outlet end extending out of the battery box 1.

If the temperature of the battery pack is high and needs to be reduced, low-temperature cold water is supplied to the upper water-cooling plate 3 at the top of each battery module 2 through the cold water pipe 6, the cold water in the upper water-cooling plate 3 absorbs the heat of the battery modules 2 and then flows out of the water return pipe 8, the upper water-cooling plate 3 is far away from the bottoms of the battery modules 2 and the soaking plate 5 because the upper water-cooling plate 3 is close to the tops of the battery modules 2 and the soaking plate 5, the upper water-cooling plate 3 firstly absorbs the heat at the top of the soaking plate 5 so that the phase-change liquid vaporized at high temperature in the soaking plate 5 releases heat and condenses at the top of the soaking plate 5, the condensed phase-change liquid flows downwards to the bottom of the soaking plate 5 under the action of gravity, the condensed phase-change liquid is vaporized and flows upwards again (the phase-change liquid absorbs the heat of the battery monomers at the bottom of the battery, and the heat of the battery monomer at the bottom of the battery module can be quickly absorbed.

If the temperature of the battery pack is low and needs to be raised, high-temperature hot water is supplied to the lower water cooling plate 4 at the bottom of each battery module 2 through the hot water pipe 7, and the hot water in the lower water cooling plate 4 heats the battery modules 2 and then flows out of the water return pipe 8. In the same way, the phase-change liquid at the bottom in the soaking plate 5 is heated to vaporize and flow upwards, the top in the soaking plate 5 is cooled and condensed and drops downwards, and the heat is emitted to the battery monomer at the top of the battery module when condensed, so that the battery monomer at the top of the battery module is heated and heated. The circulation is repeated, so that the lower water cooling plate 4 can heat the battery monomer at the bottom of the battery module close to the lower water cooling plate and can also heat the battery monomer at the top of the battery module rapidly.

Further, the cold water pipe 6 and the hot water pipe 7 share the same water supply port, which is simultaneously connected to the cold water pipe 6 and the hot water pipe 7 through a three-way valve 9. When the battery module needs to be heated, the connecting end of the three-way valve 9 and the cold water pipe 6 is closed, the connecting end of the three-way valve 9 and the hot water pipe 7 is communicated, hot water is introduced into the water supply port, and the hot water flows into the hot water pipe 7 through the three-way valve; when the battery module needs to absorb heat and cool, the connecting end of the three-way valve 9 and the cold water pipe 6 is communicated, the connecting end of the three-way valve 9 and the hot water pipe 7 is closed, cold water is introduced into the water supply port, and the cold water flows into the cold water pipe 6 through the three-way valve.

Moreover, in order to save the length of the pipe and the space in the box occupied by the pipe, the cold water pipe 6, the hot water pipe 7 and the water return pipe 8 are arranged on the same side of each battery module 2 in the embodiment.

All the lower water-cooled panels 4 are arranged on the same plane.

The upper water cooling plate 3 and the battery module 2 are clamped by a silica gel pad arranged horizontally, and the lower water cooling plate 4 and the battery module 2 are clamped by a silica gel pad arranged horizontally. The silica gel pad has good thermal conductivity and insulating property, and prevents the water-cooling plate made of metal from being in direct contact with the battery monomer 201 to cause short circuit.

In addition, in the present embodiment, each battery module 2 is fixedly connected to the upper water cooling plate 3 on the upper top surface and the lower water cooling plate 4 on the lower bottom surface.

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 pack, comprising:

a battery case (1), and

a plurality of battery modules (2) accommodated in the battery box,

its characterized in that, the outline of battery module (2) is the cuboid structure, each battery module (2) on the horizontal direction, along the width of cuboid arranges in proper order, every go up the top surface of battery module (2) and lower bottom surface difference level lay the last water-cooling board (3) of a rectangular plate structure and lower water-cooling board (4) of a rectangular plate structure, every all insert in battery module (2) establish with battery monomer (201) heat conduction contact in this battery module (2) and with go up water-cooling board (3) with soaking board (5) that lower water-cooling board (4) heat conduction is connected.

2. The battery pack according to claim 1, wherein the vapor chamber (5) contains a phase-change liquid.

3. The battery pack of claim 2, wherein the phase-change liquid is an electro-fluorinated liquid.

4. The battery pack according to claim 2, wherein the battery case (1) further has disposed therein:

a cold water pipe (6) which is communicated with all the water cooling channels in the upper water cooling plate (3),

a hot water pipe (7) communicated with all the water-cooling flow passages in the lower water-cooling plate (4), and

the water return pipes (8) are communicated with all the water cooling channels in the upper water cooling plate (3) and all the water cooling channels in the lower water cooling plate (4);

the cold water pipe (6) and the hot water pipe (7) are provided with water supply ends extending out of the battery box (1), and the water return pipe (8) is provided with a water outlet end extending out of the battery box (1).

5. The battery pack according to claim 4, wherein the cold water pipe (6) and the hot water pipe (7) share the same water supply port, which is simultaneously connected to the cold water pipe (6) and the hot water pipe (7) through a three-way valve (9).

6. Battery pack according to claim 1, characterized in that all the lower water-cooled plates (4) are arranged on the same plane.

7. The battery pack according to claim 1, wherein a horizontally arranged silica gel pad is sandwiched between the upper water cooling plate (3) and the battery module (2), and a horizontally arranged silica gel pad is sandwiched between the lower water cooling plate (4) and the battery module (2).

8. The battery pack according to claim 1, wherein the soaking plate (5) is an aluminum extruded structure.

9. The battery pack according to claim 1, wherein each of the battery modules (2) is fixedly connected with the upper water-cooling plate (3) on the upper top surface thereof and the lower water-cooling plate (4) on the lower bottom surface thereof.