Safety monitoring and controlling method for li-ion power battery thermorunaway and device thereof

A power battery and thermal runaway technology, applied in battery temperature control, secondary battery, secondary battery repair/maintenance, etc., can solve problems such as large amount of dust, pollution of battery box and battery compartment, and large volume

Inactive Publication Date: 2017-12-05
北京理工晋西科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of dust in the dry powder fire extinguishing device, the battery box and the battery compartment will be seriously polluted when the fire is extinguished
Aerosol is a multi-phase mixed fire extinguishing agent, which is highly corrosive and conductive, and will cause a short circuit of the power battery. At the same time, as a combustion-type fire extinguishing method, it will aggravate the thermal damage of t

Method used

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  • Safety monitoring and controlling method for li-ion power battery thermorunaway and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] This embodiment provides a safety prevention and control method for thermal runaway of lithium-ion power battery, which can control the thermal runaway speed of lithium-ion battery, reduce the risk of fire after runaway, and extinguish the initial fire of power battery box and battery compartment.

[0022] Specifically, a composite medium with both cooling and extinguishing effects is used as a safety prevention and control medium for thermal runaway of lithium-ion batteries, and the safety prevention and control medium is filled in a lithium-ion battery safety prevention and control device with a specific structure. When the temperature, fire and other detection sensors detect signs of thermal runaway or fire of the lithium-ion battery, the fire controller uses an electric start to open the medium injection port of the lithium-ion battery safety prevention and control device, and the safety prevention and control in the prevention and control device The ...

Example Embodiment

[0024] Example 2:

[0025] This embodiment provides a lithium-ion battery safety prevention and control device that can adopt the safety prevention and control method described in Embodiment 1, such as figure 1 As shown, the safety prevention and control device includes: a housing 1 and a prevention and control medium filling port 2, a pressure gauge connection port 3, a nozzle 4, and a safety valve pressure relief port 5 provided on the housing 1. At the same time, a fire controller (commonly used fire alarm controllers sold in the market can be used) is provided on the shell 1. When in use, the safety prevention and control device is placed in a power battery box or a battery compartment, and the size and shape of the housing 1 can be flexibly designed and changed according to the requirements of the use occasion (such as an electric vehicle battery box, etc.). Considering the narrow internal space of the battery box, the housing 1 is designed as a rectangular flat box; when u...

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Abstract

The invention discloses a safety monitoring and controlling method for li-ion power battery thermorunaway and a device thereof. When a li-ion power battery suffers from thermorunaway, a composite medium with cooling and fire-extinguishing effects is used as a safety monitoring and controlling medium to enter a power battery box or battery tank in an injection mode. The safety monitoring and controlling medium is composed of chemical substances which are formed by C, F, H and O elements and have cooling and fire-extinguishing effects. A li-ion battery safety monitoring and controlling device based on the above safety monitoring and controlling method comprises a shell and a safety monitoring and controlling medium filling port, a pressure meter connector, a nozzle and a safety valve pressure relief opening which are arranged on the shell. The safety monitoring and controlling device can effectively prevent or reduce the li-ion battery thermorunaway risk, reduce fire probability of the li-ion battery box (tank), control and extinguish initial fire, and has functions of starting operation for many times and extinguishing re-ignited fire of the power battery box.

Description

Technical field [0001] The invention relates to a safety prevention and control method and device, in particular to a prevention and control method and device for preventing or reducing the risk of thermal runaway of a lithium ion battery. Background technique [0002] Currently, lithium-ion batteries have been widely used in military and civilian applications such as mobile phones, electric vehicles, and ships. Due to inevitable manufacturing defects and other internal and external reasons, lithium-ion batteries often suffer from thermal runaway, leading to accidents such as combustion and explosion. In particular, lithium-ion power batteries used in vehicles and ships have a large number of single batteries and complex assembly and connection methods. In the power battery compartment of large battery buses, the number of lithium-ion batteries is often more than 5,000. The probability of thermal runaway of single lithium-ion battery is generally more than five parts per million...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/613H01M10/625H01M10/65
CPCH01M10/4207H01M10/425H01M10/613H01M10/625H01M10/65Y02E60/10
Inventor 杜志明张泽林郭泽荣刘玲王爽赵林双郝晋媛
Owner 北京理工晋西科技有限公司
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