Method for preventing and eliminating ignition of power battery of new energy automobile

Abstract

A method for preventing and eliminating ignition of a power battery of a new energy automobile comprises the steps that the power battery is soaked in a liquid fire extinguishing medium, and the liquid fire extinguishing medium has good fluidity, good heat exchange performance, good isolation performance and non-conductivity. When an internal short circuit occurs in a certain single battery, the temperature in the battery rises sharply, the material in the battery generates a large amount of combustible gas under the action of high temperature, and the shell of the battery is broken due to expansion of the combustible gas. At the moment, the liquid fire extinguishing medium with good fluidity enters the battery to isolate the relation between combustible gas and short-circuit sparks, the temperature in the battery is rapidly lowered due to the heat exchange property of the liquid fire extinguishing medium, and then the chemical reaction of the internal materials is terminated so that the purpose of extinguishing fire can be achieved.

Description

technical field

[0001] The invention relates to the management of power batteries of new energy vehicles, in particular to a method for preventing and eliminating fire of the power batteries of new energy vehicles. Background technique

[0002] During the long-term use of the power battery of new energy vehicles, a fire accident caused by its internal short circuit occurred, which restricted the healthy development of the industry. The method described in the Chinese patent "A Separate Automatic Fire Extinguishing System for Lithium-Ion Batteries for New Energy Vehicles" is based on the principle of data collection and electrical control by multiple sensors. The whole system is relatively complicated and has limitations. Contents of the invention

[0003] In order to prevent and eliminate the fire of the new energy vehicle power battery more efficiently and simply, the present invention provides a method for preventing and eliminating the fire of the new energy vehicle pow...

Examples

Embodiment Construction

[0005] The following embodiments are only some embodiments of the present invention, and do not represent all embodiments of the present invention.

[0006] A fixed assembly is formed by several special brackets for 26800 cylindrical power batteries, the upper and lower ends of the battery are fixed by the special bracket, and the joint between the bracket and the battery body and the surroundings of the battery assembly are sealed with plates and sealing materials, so that the battery The battery pool body of the assembly forms a cavity, and the fire extinguishing cooling medium is injected into the cavity, so that the maximum area of ​​the pool body of all the single batteries in the battery assembly is immersed in the fire extinguishing cooling medium, and the extinguishing cooling medium is separated from the electrodes , so as to achieve the purpose of protecting the battery from thermal runaway and fire around the clock.

[0007] In particular, the fire extinguishing coo...

technical field

[0001] The invention relates to the management of power batteries of new energy vehicles, in particular to a method for preventing and eliminating fire of the power batteries of new energy vehicles. Background technique

[0002] During the long-term use of the power battery of new energy vehicles, a fire accident caused by its internal short circuit occurred, which restricted the healthy development of the industry. The method described in the Chinese patent "A Separate Automatic Fire Extinguishing System for Lithium-Ion Batteries for New Energy Vehicles" is based on the principle of data collection and electrical control by multiple sensors. The whole system is relatively complicated and has limitations. Contents of the invention

[0003] In order to prevent and eliminate the fire of the new energy vehicle power battery more efficiently and simply, the present invention provides a method for preventing and eliminating the fire of the new energy vehicle pow...

Examples

Embodiment Construction

[0005] The following embodiments are only some embodiments of the present invention, and do not represent all embodiments of the present invention.

[0006] A fixed assembly is formed by several special brackets for 26800 cylindrical power batteries, the upper and lower ends of the battery are fixed by the special bracket, and the joint between the bracket and the battery body and the surroundings of the battery assembly are sealed with plates and sealing materials, so that the battery The battery pool body of the assembly forms a cavity, and the fire extinguishing cooling medium is injected into the cavity, so that the maximum area of ​​the pool body of all the single batteries in the battery assembly is immersed in the fire extinguishing cooling medium, and the extinguishing cooling medium is separated from the electrodes , so as to achieve the purpose of protecting the battery from thermal runaway and fire around the clock.

[0007] In particular, the fire extinguishing coo...