CN210723159U

CN210723159U - Fire extinguishing power battery module and battery pack

Info

Publication number: CN210723159U
Application number: CN201921951900.9U
Authority: CN
Inventors: 龙赛夫; 毛焕宇; 刘贯东; 马飒
Original assignee: Suzhou Youlion Battery Inc
Current assignee: Suzhou Youlion Battery Inc
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-06-09
Anticipated expiration: 2029-11-13

Abstract

The utility model provides a power battery module of putting out a fire, include: the fire extinguishing container comprises a module body, a top cover plate and a fire extinguishing container, wherein the top cover plate is fixedly installed at the top of the module body, a mounting groove is formed in the top cover plate and penetrates through the top cover plate, a surrounding plate extending upwards from the surface of the top cover plate is circumferentially arranged on the mounting groove, the fire extinguishing container is fixedly installed in the mounting groove, the bottom of the fire extinguishing container is an insulating polymer film, and a fire extinguishing agent is arranged inside the fire extinguishing container. The utility model also provides a battery package. The utility model provides a pair of power battery module and battery package put out a fire can effectively avoid lithium cell group to catch fire, improves lithium ion battery's security performance greatly.

Description

Fire extinguishing power battery module and battery pack

Technical Field

The utility model relates to a battery module and battery package particularly, relate to a power battery module and battery package of putting out a fire.

Background

With the development of new energy industry, electric vehicles are more and more popular, but the battery of the electric vehicle is on fire often, so that the safety performance of the electric vehicle is paid great attention. However, the battery is affected by many factors, wherein the influence caused by thermal runaway of the battery is very large, and the internal or external fire of the battery pack can possibly spread, namely, the internal fire is affected by the safety of vehicles and members outside the battery pack, or the vehicles are on fire and spread to the internal of the battery pack, so that the electric core and the battery module in the battery pack are on fire and explode, and the dangerous situation is aggravated. Therefore, the link of preventing heat expansion and fire spreading is particularly important.

In the related art, the upper case of the battery pack is generally designed to be combined with a fire-proof cloth (patent CN 206422120U) to seal and protect the battery from fire. But this can only block the burning cell and reduce the time of the spread of the burning, which can only delay, but not reduce and extinguish the fire of the cell. Patent CN 208541728U reports and adopts the container of putting out a fire to place on the battery package upper surface, and it can play the fire extinguishing effect, but a big space container is placed the battery package top, takes up a large amount of battery package weight and volume, is unfavorable for the promotion of energy density.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a power battery module and battery package put out a fire, when the battery cell takes place the thermal runaway, the fire extinguishing agent in the container can play fast and weaken and eliminate the fire of battery, avoids the intensity of a fire to stretch the explosion that causes whole battery package. In addition, after the battery cell is on fire, the intensity of a fire weakens and is extinguished the back, and the battery can not further burn and release the heat, does benefit to the battery cooling, finally reduces the heat expansion risk in the battery system. The method can reduce economic loss and ensure life safety of people.

Therefore, the utility model provides a power battery module puts out a fire, include: the fire extinguishing container comprises a module body, a top cover plate and a fire extinguishing container, wherein the top cover plate is fixedly installed at the top of the module body, a mounting groove is formed in the top cover plate and penetrates through the top cover plate, a surrounding plate extending upwards from the surface of the top cover plate is circumferentially arranged on the mounting groove, the fire extinguishing container is fixedly installed in the mounting groove, the bottom of the fire extinguishing container is an insulating polymer film, and a fire extinguishing agent is arranged inside the fire extinguishing container.

Further, the mounting groove is arranged along the length direction of the top cover plate.

Further, a heat conduction silica gel pad is arranged below the module body.

Further, the fire extinguishing container is in a cylindrical shape, a rectangular parallelepiped shape, a T shape or an arch shape.

Further, the insulating polymer film is resistant to temperature of 130 to 250 ℃.

Further, the insulating polymer film is a PE film, a PP film or a PVC film.

Additionally, the utility model provides a battery pack, including box and a plurality of foretell power battery module of putting out a fire, be provided with explosion-proof valve on the lateral wall of box.

The utility model provides a power battery module and battery package put out a fire is provided with the container of putting out a fire on the lamina tecti of battery module, and a plurality of battery modules are in proper order and parallel mount in the box of battery package, are provided with the explosion-proof valve on the lateral wall of box. When the single battery is out of control thermally and the temperature exceeds the temperature resistance of the insulating polymer film at the bottom of the fire extinguishing container, the insulating polymer film is decomposed at high temperature, and the fire extinguishing agent prepared from solid powder such as ammonium chloride, melamine, tetrabromobisphenol A, decabromophenylethane, hexachlorocyclotriphosphazene, triphenyl phosphorus oxide, pentaerythritol phosphate and the like in the fire extinguishing container is decomposed thermally. The thermally decomposed fire extinguishing agent can generate a melting layer or a carbon layer at the lithium ion cell explosion-proof valve to isolate oxygen so as to slow or stop combustion; the non-combustible gas generated by decomposition can dilute the oxygen concentration; the decomposition produces species that can capture hydroxyl radicals and hydrogen radicals produced in the combustion. Therefore, the fire extinguishing agent in the container can quickly weaken and extinguish the fire of the battery, and the explosion of the whole battery pack caused by the spread of fire is avoided. The heat conduction silica gel pad that module body below set up can improve the heat-sinking capability of battery die holder, reduces battery cell's thermal runaway.

The utility model provides a pair of power battery module and battery package put out a fire can effectively avoid lithium cell group to catch fire, improves lithium ion battery's security performance greatly.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a fire extinguishing power battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first scheme of a fire extinguishing power battery module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a second scheme of the fire extinguishing power battery module according to the embodiment of the present invention;

fig. 5 is a schematic view of a scheme three structures of a power battery module for fire extinguishing provided by an embodiment of the utility model.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1 to 3, the drawings show that the utility model discloses a power battery module and battery package put out a fire that embodiment one provides includes: module body 1, lamina tecti 2 and container 3 of putting out a fire, 2 fixed mounting of lamina tecti are at the top of module body 1, be provided with mounting groove 21 on the lamina tecti 2, mounting groove 21 runs through lamina tecti 2, mounting groove 21 circumference is provided with the bounding wall 22 that upwards extends from 2 surfaces of lamina tecti, 3 fixed mounting of container 3 of putting out a fire are in mounting groove 21, the bottom of container 3 of putting out a fire is insulating polymer film 31, the inside of container 3 of putting out a fire is provided with the fire extinguishing agent, specifically adopt what kind of fire extinguishing agent can refer to chinese patent CN201810867491.8, it does not belong to the utility model discloses an innovation part, no longer.

Specifically, referring to fig. 1 to 3, a heat conductive silicone pad 11 is disposed below the module body 1.

Specifically, referring to fig. 1 to 3, the insulating polymer film 31 is resistant to temperature of 130 to 250 degrees.

Specifically, referring to fig. 1 to 3, the insulating polymer film 31 is a PE film, a PP film, or a PVC film.

Additionally, the utility model provides a battery pack, including box 4 and a plurality of battery module, be provided with explosion-proof valve 41 on the lateral wall of box 4.

Example two:

referring to fig. 1 to fig. 3, the drawings show a fire extinguishing power battery module and a battery pack provided by the second embodiment of the present invention, and the present embodiment further makes the following technical solutions as improvements on the basis of the above embodiments: the mounting groove 21 is arranged along the length direction of the top cover plate 2.

The mounting groove is arranged along the length direction of the top cover plate and is positioned in the center of the top cover plate, so that the control area of the fire extinguishing container in the mounting groove is larger. No matter where the battery module produces thermal runaway, the fire extinguishing container installed in the installation groove can release the fire extinguishing agent more quickly and effectively.

Example three:

referring to fig. 4 and 5, a power battery module with fire extinguishing function according to a third embodiment of the present invention is shown in the drawings, and the present embodiment further provides the following technical solutions as improvements on the basis of the above embodiments: the fire extinguishing container 3 is in a cylinder shape, a cuboid shape, a T shape or an arch shape.

The shape of the fire extinguishing container can be made into different shapes such as a cylinder shape, a cuboid shape, a T shape, a bow shape and the like according to the conditions of the space inside the battery pack, the storage amount of the fire extinguishing agent and the like.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a power battery module puts out a fire which characterized in that includes: module body (1), lamina tecti (2) and container (3) of putting out a fire, lamina tecti (2) fixed mounting be in the top of module body (1), be provided with mounting groove (21) on lamina tecti (2), mounting groove (21) run through lamina tecti (2), mounting groove (21) circumference is provided with certainly lamina tecti (22) that upwards extend in (2) surface, container (3) fixed mounting of putting out a fire is in mounting groove (21), the bottom of container (3) of putting out a fire is insulating polymer film (31), the inside of container (3) of putting out a fire is provided with the fire extinguishing agent.

2. Fire extinguishing power battery module according to claim 1, characterized in that the mounting groove (21) is arranged along the length direction of the top cover plate (2).

3. Fire extinguishing power battery module according to claim 1, characterized in that a heat conducting silicone pad (11) is arranged below the module body (1).

4. Fire extinguishing power battery module according to claim 1, characterized in that the fire extinguishing container (3) is cylindrical, cuboid, T-shaped or bow-shaped.

5. The fire extinguishing power battery module as recited in claim 1, characterized in that the insulating polymer film (31) is resistant to temperature of 130 to 250 degrees.

6. Fire extinguishing power battery module according to claim 5, characterized in that the insulating polymer film (31) is a PE film, a PP film or a PVC film.

7. A battery pack, comprising: a box body (4) and a plurality of fire-extinguishing power battery modules according to any one of claims 1 to 6, wherein the side wall of the box body (4) is provided with an explosion-proof valve (41).