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Gas production rate measurement and gas collection device for thermal runaway process of lithium ion battery

A lithium-ion battery and collection device technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as large errors, low accuracy of gas production measurement results, and many gas impurities, and achieve reliable data support. Effect

Inactive Publication Date: 2019-07-02
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gas impurities collected by the simple device are more, and the accuracy of the gas production measurement results is not high, resulting in a large error between the subsequent gas composition analysis results and the real results

Method used

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  • Gas production rate measurement and gas collection device for thermal runaway process of lithium ion battery
  • Gas production rate measurement and gas collection device for thermal runaway process of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] like figure 1 As shown, this embodiment provides a gas production measurement and gas collection device during thermal runaway of lithium-ion batteries, including:

[0053] A pressure explosion-proof container A with a closed space, including a top cover A1, a container wall A2 and a base A3, the internal volume V of the pressure explosion-proof container 容器 = 1.0L, the pressure range is 0 atmosphere to 6 atmospheres;

[0054] A plurality of heating devices B for heating the pressure explosion-proof container A and the lithium-ion battery to be tested, the heating device includes 3 heating modules B1-B3 evenly distributed on the circumference of the middle part of the container wall, and 1 heating module placed on the top cover A heating module B4, a heating module B5 placed on the base and a heating module B6 placed on the battery, the heating module on the battery is connected with a heating wire wound on the battery. The temperature range of the heating module is 0...

Embodiment 2

[0076] Measure the mass and size of the lithium-ion battery, record its mass as m, and calculate its volume as V;

[0077] The lithium-ion battery is placed in the battery suspension device C of the pressure explosion-proof container A, and the internal volume V of the pressure explosion-proof container is 容器 =1.0L, the battery heating module B6 is connected to the heating wire and wound on the battery, the battery temperature detection module F6 is placed on the battery, the positive and negative electrodes of the battery are connected to the voltage acquisition line through the terminal posts E1 and E2, and the pressure explosion-proof container A is sealed;

[0078] Open the inert gas inlet and outlet valves, pass inert gas for a period of time, drain the air in the container, fill the container with inert gas, and keep the container pressure at about 1 atmosphere, and close the inert gas inlet and outlet valves; at this time Denote the pressure as p 0 , the temperature is...

Embodiment 3

[0086] Measure the mass and size of the lithium-ion battery, record its mass as m, and calculate its volume as V;

[0087] The lithium-ion battery is placed in the battery suspension device C of the pressure explosion-proof container A, and the internal volume V of the pressure explosion-proof container A is 容器 =1.0L, the battery temperature detection module F6 is placed on the battery, the positive and negative poles of the battery are electrically connected to the battery charging and discharging equipment E3 through the terminal posts E1, E2, connected to the voltage acquisition line, and the pressure explosion-proof container A is sealed;

[0088] Open the inert gas inlet and outlet valves, pass inert gas for a period of time, drain the air in the container, fill the container with inert gas, and keep the container pressure at about 1 atmosphere, and close the inert gas inlet and outlet valves; at this time Denote the pressure as p 0 , the temperature is T 0 ;

[0089] ...

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Abstract

The invention, which belongs to the technical field of safety control, particularly relates to a gas production rate measurement and gas collection device for the thermal runaway process of a lithiumion battery. The device comprises a pressure explosion-proof container, a heating device, a battery suspension device, an inert gas circulation device, a battery charge and discharge module, a detection device, an explosion-proof pressure relief module, a control system, and a gas collection module. Compared with the prior art, the gas production rate measurement and gas collection device has thefollowing beneficial effects: gas production rate measurement and gas collection are carried out on gas generated by the thermal runaway triggered by the high-temperature, over-charging, and over-discharge problems of the lithium-ion battery; the temperature and voltage changing situations of the thermal runaway process of the lithium ion battery are monitored in real time; and the reliable data support is provided for the analysis of thermal runaway of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of safety control, and in particular relates to a gas production measurement and gas collection device in the thermal runaway process of a lithium-ion battery. Background technique [0002] In recent years, the electric vehicle industry has developed rapidly around the world. The core component of electric vehicles is power batteries; in my country, lithium-ion batteries are mainly used as power batteries for electric vehicles. However, due to frequent reports of fire and explosion accidents caused by lithium-ion batteries, their safety issues have attracted much attention. The safety problem of lithium-ion batteries is mainly caused by thermal runaway. High temperature, overcharge, over-discharge, etc. are important reasons for thermal runaway of lithium-ion batteries. Thermal runaway of lithium-ion batteries produces gas at high temperatures. The gas analysis is the research One of the important means of ...

Claims

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Application Information

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IPC IPC(8): G01N7/16G01R31/382
CPCG01N7/16
Inventor 田君陈亚东王一拓赵鼎陈芬田崔钧高申胡道中王发成佟蕾张跃强高洪波
Owner CHINA NORTH VEHICLE RES INST
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