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Comprehensive evaluation method and system for thermal runaway safety of power battery

A comprehensive evaluation, power battery technology, applied in the measurement of electricity, measurement of electrical variables, thermal analysis of materials, etc., can solve problems such as effective evaluation of thermal runaway safety

Active Publication Date: 2019-08-06
TSINGHUA UNIV
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Problems solved by technology

[0004] Based on this, it is necessary to provide multi-scale thermal stability related tests based on battery materials, battery pole pieces and battery cells, and pass The test data is compared and analyzed comprehensively, and a comprehensive evaluation method and system for thermal runaway safety of power batteries are obtained.

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  • Comprehensive evaluation method and system for thermal runaway safety of power battery
  • Comprehensive evaluation method and system for thermal runaway safety of power battery
  • Comprehensive evaluation method and system for thermal runaway safety of power battery

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Embodiment Construction

[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the comprehensive evaluation method and system for thermal runaway safety of power batteries provided by the present application will be further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0040] see figure 1 , the application provides a comprehensive evaluation method for thermal runaway safety of power batteries, including:

[0041] S10, providing a battery material, and performing component analysis, morphology analysis, structure analysis, and surface and interface analysis on the battery material to obtain a performance analysis diagram of the battery material.

[0042] The battery material may include battery positive active material, battery negative ac...

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Abstract

The application relates to a comprehensive evaluation method and system for thermal runaway safety of a power battery. With the comprehensive evaluation method, multi-scale mechanism analysis and comprehensive evaluation are carried out on the thermal runaway of a battery. According to comprehensive evaluation method, related thermal stability testing is carried at three dimensions of the batterymaterial, the battery pole piece and the single battery body. On the basis of comprehensive comparative analysis of the test data, influences on the thermal runaway of the single battery body by thermal characteristics of different components and the mutual coupling effects between components are determined by combining in situ and ex-situ observation and material characterization methods. The mechanism analysis and thermal safety quantitative evaluation of the thermal runaway of the battery are provided by combining the test result of the adiabatic thermal runaway of the single battery body.The comprehensive evaluation method and system have the important practical value and guiding significance in the safety design and thermal runaway prevention of the power battery for an electric vehicle.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a comprehensive evaluation method and system for thermal runaway safety of power batteries. Background technique [0002] Electric vehicles are the main body of new energy vehicles, and power batteries are the core energy source of electric vehicles. The driving range of an electric vehicle depends on the specific energy of the power battery and the number of batteries on the electric vehicle. Due to the space and cost constraints of electric vehicles, increasing the specific energy of power batteries is the key to increasing the driving range of electric vehicles. Generally, power batteries with higher specific energy under the same volume store more energy, and may release more energy when thermal runaway occurs, bringing more serious safety hazards. Therefore, it is necessary to fully evaluate and consider the thermal runaway safety of the power battery in the de...

Claims

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Application Information

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IPC IPC(8): G01R31/367G01N33/00G01N25/00
CPCG01N25/00G01N33/00G01R31/367
Inventor 王昱冯旭宁任东生卢兰光欧阳明高何向明王莉
Owner TSINGHUA UNIV
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