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Power lithium ion battery cycle life equivalent test method

A lithium-ion battery, cycle life technology, applied in the field of efficiency testing

Inactive Publication Date: 2016-05-04
BEIJING BEIJIAO NEW ENERGY TECH CO LTD
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Problems solved by technology

Therefore, how to select the equivalent stress conditions of battery life for laboratory testing according to the specific actual vehicle operating environment, determine the equivalent cycle life test method for simulating the actual operating environment, and use it to simulate and quantify the life of the battery in the actual pure electric vehicle application Mechanisms of aging remain a very challenging and important question

Method used

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  • Power lithium ion battery cycle life equivalent test method
  • Power lithium ion battery cycle life equivalent test method
  • Power lithium ion battery cycle life equivalent test method

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Embodiment Construction

[0042] In order to facilitate the understanding of those skilled in the art, the structural principles and implementation methods of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings:

[0043] 1. In order to analyze the operating environment and characteristics of pure electric vehicles in Beijing, and extract the equivalent test stress of the power lithium-ion battery cycle life (vehicle driving condition test stress, discharge depth test stress and operating temperature test stress), the actual load The pure electric bus and its on-board battery system have been used to build a test platform for pure electric vehicles (such as figure 1 shown).

[0044] Track the performance of the power lithium-ion battery in actual loading and operation, and analyze the main characteristics, operating status and performance change trend of the power lithium-ion battery pack for pure electric vehicles. At the s...

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Abstract

The invention discloses a power lithium ion battery cycle life equivalent test method, and brings forward an equivalent cycle life test method realized by simulating an actual running environment for a pure electric vehicle running environment. The method comprises erecting a pure electric vehicle test platform, acquiring pure electric vehicle real-vehicle running data, and analyzing and extracting a vehicle running condition reflecting a pure electric vehicle running feature; extracting vehicle driving working condition test stress; extracting discharge depth test stress of a power lithium ion battery; extracting working temperature test stress of the power lithium ion battery; and according to the extracted test stress, selecting a scope of different test stress reflecting actual conditions, and designing a complete cycle life equivalent test scheme simulating the working state of the power lithium ion battery in an actual pure electric vehicle running environment through combination. According to the method, the test result has certain guidance significance for actual application.

Description

technical field [0001] The invention relates to a method for testing the cycle life of a power lithium-ion battery, in particular to an equivalent test method for the cycle life of a power lithium-ion battery used for laboratory simulation and quantification of the battery aging mechanism in actual pure electric vehicle applications. Background technique [0002] The energy crisis and environmental pollution have become problems that the whole world faces and need to be solved urgently. It has become a global consensus to accelerate the strategic transformation of transportation energy and accelerate the development and promotion of new energy vehicles represented by electric vehicles. [0003] New energy vehicles have been identified as one of the seven strategic emerging industries in my country. Power battery, as one of the key technologies of new energy vehicles, is the technical bottleneck of its development. In order to effectively grasp the key external characteristi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/382
Inventor 马泽宇吴健张维戈孟学东韩耸
Owner BEIJING BEIJIAO NEW ENERGY TECH CO LTD
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