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Power battery thermal runaway early warning method

A power battery, thermal runaway technology, applied in battery/fuel cell control devices, electric vehicles, control devices, etc., can solve problems such as low detection accuracy

Active Publication Date: 2019-10-25
智锂物联(杭州)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, it is necessary to provide a power battery thermal runaway early warning method for the problem of low detection accuracy of the traditional thermal runaway early warning method

Method used

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  • Power battery thermal runaway early warning method
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  • Power battery thermal runaway early warning method

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Embodiment Construction

[0050] In order to make the above objectives, features and advantages of the present application more obvious and understandable, the specific implementation of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are explained in order to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of this application. Therefore, this application is not limited by the specific implementation disclosed below.

[0051] 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 a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an in...

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Abstract

The invention provides a power battery thermal runaway early warning method. The abnormal deviation of the lowest battery monomer voltage to the average voltage is calculated and the abnormal deviation of the highest monomer temperature to the average temperature is calculated through real-time detection data of the battery monomer voltage and the battery monomer temperature. The battery value ofa battery module is detected, and abnormal deviation of the charge state is calculated according to various detection parameters. Meanwhile, the combustible gas concentration and the gas pressure aredetected in real time, and whether the combustible gas concentration reaches a threshold value or not and whether the gas pressure reaches the threshold value or not are judged. The above parameters are comprehensively considered, and thermal runaway early warning is performed. According to the method, the thermal runaway can be early warned before the thermal runaway occurs, so that the harm caused by the thermal runaway is greatly reduced. The power battery thermal runaway early warning method is beneficial to improving the reliability of power battery safety management and reducing the occurrence of lithium ion power battery safety accidents.

Description

Technical field [0001] This application relates to the field of battery technology, in particular to a method for pre-warning the thermal runaway of a power battery. Background technique [0002] To alleviate energy shortages and environmental pollution, my country has included new energy vehicles as a strategic emerging technology industry. The electrification of automotive power systems has gradually become one of the main trends in the development of future automotive technology. One of the main characteristics of the electrification of the vehicle power system is the use of electrical energy instead of chemical energy as the main driving energy source for vehicles. Because of its high specific energy, low self-discharge rate and long cycle life, lithium-ion power battery is currently the most practical energy source for pure electric vehicles. [0003] However, with the large-scale application of lithium-ion batteries in electric vehicles, safety accidents of lithium-ion powe...

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Application Information

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IPC IPC(8): B60L58/10B60L58/12G07C5/08
CPCB60L58/10B60L58/12B60L2240/545B60L2240/549G07C5/0808G07C5/0816Y02T10/70
Inventor 潘岳冯旭宁欧阳明高卢兰光韩雪冰
Owner 智锂物联(杭州)科技有限公司
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