Electric automobile battery pack random vibration fatigue acceleration method based on real road spectrum

An electric vehicle, random vibration technology, applied in the field of random vibration and fatigue of power battery structure, can solve the problems of battery pack laboratory bench vibration fatigue acceleration, single evaluation standard, etc., to ensure accuracy, strong engineering practicability, and ensure consistent effect

Inactive Publication Date: 2018-05-15
开沃新能源汽车集团股份有限公司
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Problems solved by technology

[0003] The present invention provides a random vibration fatigue acceleration method for battery packs of electric vehicles based on the real road spectrum in order to solve the problems in the prior art described above. , to accelerate the vibration fatigue of the electric vehicle battery pa

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  • Electric automobile battery pack random vibration fatigue acceleration method based on real road spectrum
  • Electric automobile battery pack random vibration fatigue acceleration method based on real road spectrum
  • Electric automobile battery pack random vibration fatigue acceleration method based on real road spectrum

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] The structural failure of the battery pack is mostly caused by structural fatigue, that is, during the normal driving of the electric vehicle, the battery pack is subjected to cyclic alternating loads, and the stress level is low, generally lower than the structural yield limit, and eventually the structural fatigue failure is caused by the accumulation of fatigue damage. In order to verify the structural reliability of the battery pack, the most direct method is to evaluate the fatigue life performance of the battery pack structure on the road test site, and it is necessary to complete a reliability test of more than 50,000 kilometers. This method is expensive. However, there are many uncontrollable factors in the road test. Usually, the vibration reliability test is transplanted indoors. On the road simulation test machine, the fatigue reliability test of the b...

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Abstract

The invention discloses an electric automobile battery pack random vibration fatigue acceleration method based on a real road spectrum. The method comprises the steps of (1) acquisition and analysis of the road load spectrum; (2) calculation of full life circle fatigue damage spectrum of the battery pack; and (3) formation of battery pack vibration fatigue acceleration (laboratory standard). Electric automobile battery pack laboratory stand vibration fatigue acceleration is performed for different installing positions of different automobile battery packs according to the actually measured road spectrum of the electric automobile driving so that the problem of single evaluation standard can be solved, and the China's electric automobile operation condition can be further met on the basis of the domestic road condition and the battery manufacturing level of the domestic enterprise.

Description

Technical field: [0001] The invention relates to a random vibration fatigue acceleration method of an electric vehicle battery pack based on a real road spectrum, which belongs to the field of random vibration and fatigue of power battery structures. Background technique: [0002] The electric vehicle battery pack is the energy source of the electric vehicle. Due to the unevenness of the road surface, the battery pack installed on the electric vehicle will inevitably bear the vibration from the road surface. Generally, the excitation from the road surface is random, and this random vibration is usually a long-term, low-stress continuous action. If the battery structure design is unreasonable, the fatigue damage of the battery caused by vibration will continue to accumulate, which will also lead to fatigue failure of the battery pack structure, affect the normal use of the battery, and bring hidden dangers to the safety of the vehicle. In response to this problem, a series o...

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Application Information

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IPC IPC(8): G01M7/02G01M7/08
CPCG01M7/022G01M7/08
Inventor 张勇张蒙阳
Owner 开沃新能源汽车集团股份有限公司
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