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Fire extinguishing method of battery system and battery system

A technology of a battery system and a battery management system, which is applied to the fire extinguishing method of the battery system and the field of the battery system, can solve problems such as poor safety of the battery system, and achieve the effects of fast gas diffusion, reduction of combustion probability, and improvement of fire extinguishing efficiency.

Active Publication Date: 2019-02-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional fire extinguishing system cannot suppress the fire of the battery very well, resulting in poor safety of the battery system

Method used

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  • Fire extinguishing method of battery system and battery system
  • Fire extinguishing method of battery system and battery system
  • Fire extinguishing method of battery system and battery system

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Embodiment Construction

[0054] Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0055] The battery system (also called battery energy storage system, or energy storage system) composed of battery cells connected in series and parallel is widely used in various scenarios that require battery system power supply, such as: electric vehicles, base station energy storage, data center backup Electricity and many other scenes. Thermal runaway, that is, combustion, may occur in the conditions of manufacturing defects and improper management of battery cells. The combustion of a single battery will release a large amount of heat. If it is not handled in time or improperly handled, it will cause the entire battery system to catch fire.

[0056] In the battery system, the thermal runaway combustion scene of the battery cell is as follows: figure 1 shown. figure 1 Among them, a battery system includes 13 single cells (cells are batteries)...

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Abstract

The invention discloses a fire extinguishing method of a battery system and the battery system. With adoption of the fire extinguishing method, the safety of the battery system can be improved. The battery system comprises a battery management system (BMS), a battery module, a gas sensor and a fire extinguishing device. BMS receives the concentration value of flammable and combustible gas collected by the gas sensor from the gas sensor, determines a target gas sensor with a security risk and the risk level of the target gas sensor according to the concentration value of the flammable and combustible gas, starts the fire extinguishing device corresponding to the target gas sensor when the risk level of the target gas sensor exceeds the first risk alarm value, and sprays fire extinguishing gas to the battery module corresponding to the target gas sensor through the fire extinguishing device. According to the fire extinguishing method, the gas sensor is adopted to monitor the flammable and combustible gas, fire is extinguished through the fire extinguishing gas, the early warning time can be prolonged, the best fire extinguishing opportunity can be grasped, and the combustion probability of a system is reduced to improve the safety of the battery system.

Description

technical field [0001] The present application relates to the field of energy storage systems, in particular to a battery system fire extinguishing method and the battery system. Background technique [0002] The battery energy storage system uses batteries (such as lithium-ion batteries) as energy storage units. The active material inside the battery is chemically active, and it is prone to thermal runaway under the condition of abuse or manufacturing defects, and then burns or explodes, which easily causes loss of life and property. [0003] Battery energy storage systems generally have the functions of charge and discharge management, state estimation, thermal management, battery fault diagnosis and safety protection. Among them, the safety protection function needs to ensure the safety of personnel and equipment when the battery is in thermal runaway. [0004] At present, the battery combustion alarm and fire extinguishing method in the battery energy storage system is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C3/16A62C5/00A62C37/36G01R31/382G01N33/00H01M10/42H01M10/48
CPCA62C3/16A62C5/006A62C37/36H01M10/4207H01M10/425H01M10/482Y02E60/10
Inventor 杨同欢蔡兵司淑坤
Owner HUAWEI TECH CO LTD
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