Multi-sensor information fusion power battery thermal runaway early warning method

A power battery and multi-sensor technology, applied in the direction of instruments, measuring electronics, scientific instruments, etc., can solve the problems of low detection accuracy and achieve the effects of improving reliability, reducing safety accidents, and reducing hazards

Inactive Publication Date: 2019-11-01
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, it is necessary to provide a multi-sensor information fusion early warning method for power b

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  • Multi-sensor information fusion power battery thermal runaway early warning method
  • Multi-sensor information fusion power battery thermal runaway early warning method
  • Multi-sensor information fusion power battery thermal runaway early warning method

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Embodiment Construction

[0043] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0044] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to"...

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Abstract

The invention provides a multi-sensor information fusion power battery thermal runaway early warning method, wherein abnormal offset of the lowest battery cell voltage to average voltage is calculatedthrough real-time monitoring data of battery cell voltage and battery cell temperature, and abnormal offset of the highest cell temperature to average temperature is calculated. Meanwhile, combustible gas concentration and gas pressure are monitored in real time, whether the combustible gas concentration meets a threshold value is judged, and whether the gas pressure meets the threshold is also judged. By comprehensive consideration of parameters above, thermal runaway early warning is executed. Through the method provided by the invention, early warning can be executed for the thermal runaway before the thermal runaway happens, consequently, harm caused by thermal runaway is reduced to a greater extent. The method provided by the invention is beneficial for improving reliability of battery safety management and reducing occurrence of safety accidents of a lithium ion power battery.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a thermal runaway warning method for a power battery based on multi-sensor information fusion. Background technique [0002] In order to alleviate the problems of energy shortage and environmental pollution, my country has listed new energy vehicles as a strategic emerging technology industry. The electrification of automobile power system has gradually become one of the main trends in the development of future automobile technology. One of the main characteristics of the electrification of the vehicle power system is to use electrical energy instead of chemical energy as the main source of driving energy for the vehicle. Due to its high specific energy, low self-discharge rate and long cycle life, lithium-ion power batteries are currently the most practical energy source for pure electric vehicles. [0003] However, with the large-scale application of lithium-ion b...

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Application Information

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IPC IPC(8): G01R31/396G01R31/385G01K13/00
CPCG01K13/00G01R31/385G01R31/396
Inventor 潘岳冯旭宁欧阳明高卢兰光韩雪冰金昌勇
Owner TSINGHUA UNIV
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