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Testing method of thermal runaway characteristic of battery

A test method and technology of thermal runaway, applied in the direction of measuring electricity, calorimeter, measuring device, etc., can solve the problem of inability to accurately find the starting point of sample exotherm

Active Publication Date: 2014-06-04
TSINGHUA UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the usual calibration method, there is no sample inside the calorimeter, and in actual testing, especially in the testing process of large-capacity power batteries, the heat absorption of the battery sample to be tested will cause the surface temperature of the sample to be lower than that during the calibration process. Therefore, in the actual thermal runaway test process, the surface temperature of the sample will gradually drop during the time interval of stopping heating. This drop will cover the self-generated heat of the sample itself, making it impossible to accurately find the temperature of the sample during the experiment. The starting point of heat release, and the starting point of heat release marks the beginning of self-heating of the battery sample to be tested, which is of great significance for the analysis of thermal runaway characteristics

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Embodiment Construction

[0021] The method for testing the thermal runaway characteristics of the battery provided by the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0022] see figure 1 , a calorimeter 100 includes a calorimetric cavity 110, a top cover 120, a first temperature sensor 130 and a second temperature sensor 140, the first temperature sensor 130 is used to monitor the temperature of the surface of the battery sample to be tested, The second temperature sensor 140 is used to monitor the temperature of the calorimetry cavity 110 . In the embodiment of the present invention, a large-scale accelerated calorimeter EV-ARC produced by British THT Company is used to conduct a thermal runaway test.

[0023] The calorimeter further includes a fixing bracket 150 for fixing the battery sample to be tested, and the fixing bracket 150 can be hoisted on the top cover 120 . The fixing bracket 150 includes a plurality o...

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Abstract

The invention provides a testing method of the thermal runaway characteristic of a battery. The testing method of the thermal runaway characteristic of the battery comprises the steps of selecting a simulant, placing the simulant inside a calorimeter, calibrating the calorimeter, obtaining calibrating data, taking out the simulant after calibrating is carried out, placing a battery sample to be tested into the calorimeter, and testing the thermal runaway characteristic of the battery sample to be tested by the utilization of the calibrating data.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a test method for the thermal runaway characteristics of batteries. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, electrification of vehicle power system has gradually become the mainstream of future vehicle technology development. One of the main characteristics of the electrification of the vehicle power system is to use the power battery as the main energy supply source of the vehicle. However, in recent years, fire and explosion accidents have occurred frequently due to thermal runaway of power batteries. The safety problem of power batteries not only seriously threatens the safety of people's lives and property, but also hinders the large-scale industrialization of electric vehicles. The research on the thermal runaway behavior of power batteries, especially the research on the thermal runaway behavior of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01K19/00
Inventor 冯旭宁张明轩欧阳明高卢兰光何向明
Owner TSINGHUA UNIV
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