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Method for preventing thermal runaway of lithium ion battery

A lithium-ion battery and thermal runaway technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of lithium-ion thermal runaway safety and other issues

Inactive Publication Date: 2019-08-09
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] Aiming at the current safety problems of lithium-ion thermal runaway, a method for preventing thermal runaway of lithium-ion batteries was invented

Method used

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  • Method for preventing thermal runaway of lithium ion battery
  • Method for preventing thermal runaway of lithium ion battery
  • Method for preventing thermal runaway of lithium ion battery

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Embodiment Construction

[0018] A method for preventing thermal runaway of a lithium-ion battery, comprising the battery management system detecting various parameters of the lithium-ion battery such as temperature, temperature rise rate, voltage, internal resistance, and battery capacity through a data acquisition device, and performing data acquisition , process and analyze the obtained data in the processor, and make a judgment on whether the current battery will trigger thermal runaway. The specific process is attached figure 1 As shown, the detected battery parameters and judgment criteria are as follows:

[0019] The first is to detect the temperature of the battery, as attached figure 2 As shown, when the battery temperature exceeds 60°C, that is, it exceeds the normal operating temperature of the battery, it is determined that the battery has entered a high-temperature operating state; when the temperature of the battery exceeds 90°C, it is determined that the SEI film inside the battery beg...

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Abstract

The invention relates to a method for preventing the thermal runaway of a lithium ion battery. The method, by detecting the working parameters of the lithium ion battery and by using the parameter indexes as an independent condition or a logical combination condition, determines whether the lithium ion battery is subjected to thermal runaway, and then uses a series of measures to avoid triggeringthe thermal runaway of the lithium ion battery in order to ensure the safety of the battery and its system. The method of the invention is applicable to various fields in automobiles, energy storage devices, and aviation where lithium ion batteries exist.

Description

technical field [0001] The method of the invention is applicable to various fields in which lithium-ion batteries exist, such as automobiles, energy storage devices, and aviation. Background technique [0002] Energy and environmental protection are major global issues that need to be solved urgently. With the continuous improvement of China's industrialization level, the huge demand for oil will increase the pressure on China's energy security. Whether it is used as an energy storage device or a power source for electric components such as automobiles, lithium-ion batteries are clean and pollution-free. Moreover, lithium-ion batteries are widely used in various fields due to their high energy density, low cost, and many cycle times. [0003] During the working process of lithium-ion batteries, if the heat generated cannot be dissipated in time, it is easy to cause heat accumulation inside. When the heat accumulates to a certain extent, the SEI film inside the battery will ...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/635H01M10/633
CPCH01M10/613H01M10/633H01M10/635Y02E60/10
Inventor 冯能莲董士康丰收李德壮
Owner BEIJING UNIV OF TECH
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