CN211605354U

CN211605354U - A case lid for lithium ion battery

Info

Publication number: CN211605354U
Application number: CN202020416267.XU
Authority: CN
Inventors: 陶林; 谢虹; 朴雨植; 唐城琨
Original assignee: Taybo Shanghai Environmental Technology Co Ltd
Current assignee: Taybo Shanghai Environmental Technology Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-09-29
Anticipated expiration: 2030-03-27

Abstract

The utility model provides a case cover for lithium ion battery, which comprises a case cover body, wherein a plurality of small vent holes are arranged at the top of the case cover body, a water inlet round hole is arranged on one side surface of the case cover body, and film seals are respectively stuck on the small vent holes and the water inlet round hole; when the lithium ion battery is out of control due to heat, the water inlet round hole is externally connected with a pipeline communicated with the outside of the carriage to inject water into the battery pack. The utility model discloses a set up exhaust aperture and inlet round hole on lithium ion battery's case lid, solved when battery thermal runaway back, the unable discharge of box inside gas to and the unable problem that gets into the box of water.

Description

A case lid for lithium ion battery

Technical Field

The utility model relates to a lithium ion battery thermal runaway field specifically relates to a case lid for lithium ion battery.

Background

Current lithium ion battery is for preventing overheated catching fire, generally can all be equipped with extinguishing device, and when battery thermal runaway back, extinguishing device can be automatic toward the inside injection fire extinguishing agent of battery package, but because the battery package is sealed, the unable quick discharge of the gas of the inside leads to battery package internal pressure too high, inside the unable timely injection battery package of fire extinguishing agent, and then can't reach the effect of postponing battery package thermal runaway.

In addition, when the battery pack is out of control due to thermal runaway and open fire occurs, water cannot enter the battery pack to cool the battery when a fireman sprays water, and the open fire is extinguished.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a case lid for lithium ion battery, the utility model discloses a set up exhaust aperture and inlet round hole on lithium ion battery's case lid, solved when battery thermal runaway back, the unable discharge of box inside gas to and the unable problem that gets into in the box of water.

According to one aspect of the utility model, a case cover for a lithium ion battery is provided, which comprises a case cover body (1), wherein a plurality of small vent holes (2) are arranged at the top of the case cover body (1), a water inlet round hole (3) is arranged on one side surface of the case cover body, and film seals are respectively stuck on the small vent holes (2) and the water inlet round hole (3); when the lithium ion battery is out of control due to heat, the water inlet round hole (3) is externally connected with a pipeline communicated with the outside of the carriage to inject water into the battery pack.

Preferably, the film is polytetrafluoroethylene, the polytetrafluoroethylene has good sealing performance, water ions cannot pass through the film, and normal use of the lithium ion battery is guaranteed.

Preferably, the number of the small vent holes (2) is 6.

Preferably, the small vent holes (2) are formed in two sides of the top of the box cover body (1), so that the normal use of the battery pack at ordinary times is not influenced, and meanwhile, the gas on two sides of the battery pack can be smoothly and timely discharged during exhausting.

The working principle is as follows: when the fire extinguishing agent delays thermal runaway and the pressure in the battery pack increases, the polytetrafluoroethylene film for sealing the vent holes is broken under high pressure, so that gas in the battery pack can be discharged smoothly, the internal pressure and the external pressure of the battery pack are kept the same, and the fire extinguishing agent can be injected into the battery pack in time to delay the thermal runaway of the battery pack; when serious (if open fire appears), water can be injected into the battery pack through the pipeline which is externally connected with the water inlet round hole and communicated with the outside of the carriage, the inside of the battery pack is cooled, and the open fire is extinguished.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model relates to a case cover for lithium ion battery, the exhaust aperture effectively solves the problem that the fire extinguishing agent can not be injected into the battery pack in time after the battery is out of control due to heat;

(2) the utility model relates to a case lid for lithium ion battery, the round hole of intaking can in time connect the water pipe externally when the naked light appears and put out a fire to the battery package inside, and cool down to the battery package inside, reduce the loss;

(3) the utility model relates to a case cover for lithium ion battery, the small exhaust hole and the round hole of intaking adopt polytetrafluoroethylene film to seal, guarantee that when the lithium ion battery is in normal use, no steam and dust enter the battery pack;

(4) the utility model relates to a case cover for lithium ion battery, which has simple structure, smart design and remarkable effect;

(5) the utility model relates to a case lid for lithium ion battery makes simply, easily processing and assembly, and is with low costs, and the practicality is strong, is fit for promoting on a large scale.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a case cover for a lithium ion battery.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Examples

The present embodiment provides a case cover for a lithium ion battery, which is shown in detail in fig. 1: the box cover comprises a box cover body 1, wherein a plurality of small air holes 2 are formed in the top of the box cover body 1, a round water inlet hole 3 is formed in one side face of the box cover body, and thin film seals are adhered to the small air holes 2 and the round water inlet hole 3; when the lithium ion battery is out of control due to heat, the water inlet round hole 3 is externally connected with a pipeline communicated with the outside of the carriage to inject water into the battery pack.

Furthermore, the film is made of polytetrafluoroethylene, the polytetrafluoroethylene is good in sealing performance, water ions cannot pass through the film, and normal use of the lithium ion battery is guaranteed.

Furthermore, the number of the small vent holes 2 is 6.

Furthermore, the small vent holes 2 are formed in two sides of the top of the box cover body 1, so that normal use of the battery pack at ordinary times is not affected, and meanwhile, gas on two sides of the battery pack can be smoothly and timely discharged when the battery pack is exhausted.

The embodiment has the following beneficial effects:

(1) the small exhaust holes effectively solve the problem that the fire extinguishing agent cannot be injected into the battery pack in time after the battery is out of control due to heat;

(2) when open fire occurs, the water inlet round hole can be timely connected with an external water pipe to extinguish the fire in the battery pack and cool the interior of the battery pack, so that loss is reduced;

(3) the small exhaust holes and the circular water inlet holes are sealed by polytetrafluoroethylene films, so that water vapor, dust and the like cannot enter the battery pack when the lithium ion battery is normally used;

(4) the structure is simple, the design is ingenious, and the effect is obvious;

(5) the manufacturing is simple, the processing and the assembly are easy, the cost is low, the practicability is high, and the method is suitable for large-scale popularization.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A case cover for a lithium ion battery comprises a case cover body (1) and is characterized in that the top of the case cover body (1) is provided with a plurality of small air holes (2), one side surface of the case cover body is provided with a round water inlet hole (3), and the small air holes (2) and the round water inlet hole (3) are both adhered with thin film seals; when the lithium ion battery is out of control due to heat, the water inlet round hole (3) is externally connected with a pipeline communicated with the outside of the carriage to inject water into the battery pack.

2. The case cover for a lithium ion battery of claim 1, wherein the membrane is polytetrafluoroethylene.

3. The case cover for lithium ion batteries according to claim 1, characterized in that there are 6 said vent holes (2).

4. The case cover for a lithium ion battery according to claim 1, wherein the vent holes (2) are provided at both sides of the top of the case cover body (1).