Judgment method and system for electric vehicle battery system vibration test and storage medium

A technology for electric vehicle battery and vibration testing, which is applied in vibration testing, testing of machines/structural components, measuring devices, etc., which can solve the waste of time and money costs, the inability to accurately determine the failure location, and the inability to quantify the evaluation of electric vehicle battery systems Reliability and other issues to achieve the effect of saving time and cost, improving safety and reliability

CN112710446AActive Publication Date: 2021-04-27BEIJING PRIDE NEW ENERGY BATTERY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-04-27

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Abstract

The invention discloses a judgment method and system for an electric vehicle battery system vibration test and a storage medium, and relates to the field of battery vibration tests. The method comprises the following steps: step 1, obtaining a PSD map containing n to-be-tested point curves in an electric vehicle battery system vibration test; step 2, extracting coordinate values of n first nodes exceeding a warning line in the PSD map; step 3, according to a preset time range, extracting a coordinate value of a second node in the preset time range; step 4, judging the result of the vibration test of the electric vehicle battery system according to the coordinate values of the n first nodes and the coordinate values of the second nodes; and step 5, if the judgment result is abnormal, sending out an error early warning, and based on the to-be-tested point corresponding to the abnormal judgment result, disassembling and checking the equipment for the vibration test of the electric vehicle battery system. The problem that the failure position cannot be accurately judged can be solved, and the effects of improving the safety and reliability of the battery system while accurate positioning is achieved.
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Description

technical field

[0001] The invention relates to the field of battery vibration tests, in particular to a judging method, system and storage medium for the vibration test of an electric vehicle battery system. Background technique

[0002] With the strong support of relevant national policies, my country's new energy electric vehicle industry has achieved rapid development and iterative upgrading of related technologies, and the safety and reliability of battery systems have become one of the important concerns of consumers. National agencies have also issued relevant safety policies and regulations, including corresponding test conditions and standards for structural safety.

[0003] However, the nearly 40-hour test can only locate whether there is a safety problem in the battery system, and it is impossible to quantitatively evaluate the reliability of the long-term application of the electric vehicle battery system. In the case of failure, due to the chain failure reactio...

Examples

Embodiment 1

[0134] Embodiment 1, after the test is completed, the battery system is quantitatively analyzed through important index parameters, and then the reliability of the battery system is evaluated and the design improvement is guided. As we all know, during the vibration test, the modal frequency of the system will decrease, and the RMS index at the modal frequency will increase accordingly. So there are two sets of key evaluation metrics and in,

[0135]

[0136]

[0137] Usually the rate of change after the test is 3% to 5%. when or If any one of them is greater than 5%, the reliability of the evaluation system is poor, and there are still hidden dangers in a small number of products in large-scale products, which should be further optimized; when and Both are less than 3%, the system reliability is very high, and the structural strength has exceeded the required application environment by a lot, and can be streamlined and optimized in terms of light weight and ...