Method for diagnosing unsafe failure forms of Pack system, and electronic equipment

A diagnostic method and unsafe technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of maintenance risks and difficulties, and the inability to obtain the unsafe failure form of the Pack system, so as to achieve high safety and reduce unsafe Failure form misdiagnosis rate, effect of avoiding fire

Active Publication Date: 2019-05-21
DONGGUAN POWERWISE TECH CO LTD
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Problems solved by technology

Moreover, when a thermal runaway alarm occurs in the above method, the current non-safe failure

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  • Method for diagnosing unsafe failure forms of Pack system, and electronic equipment
  • Method for diagnosing unsafe failure forms of Pack system, and electronic equipment
  • Method for diagnosing unsafe failure forms of Pack system, and electronic equipment

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[0049] In order to describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following is a detailed description in conjunction with the embodiments and accompanying drawings.

[0050] See figure 1 - image 3 As shown, the present invention discloses a method for diagnosing non-safe failure modes of a Pack system. The Pack system includes a number of single batteries. The method for diagnosing non-safe failure modes of the Pack system includes the following steps:

[0051] S1. Calculate the probability of occurrence of multiple non-safe failure modes in the Pack system;

[0052] S2. Calculate the average value of the probability of occurrence of multiple non-safe failure modes to obtain the probability P of occurrence of thermal runaway of the Pack system;

[0053] S3, according to the formula Pre=∑ P>A P calculates the estimated probability of occurrence of thermal runaway P greater than the constant A, and diagnoses ...

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Abstract

The invention discloses a method for diagnosing unsafe failure forms of a Pack system. The method comprises the following steps: (1) calculating the occurrence probabilities of multiple unsafe failureforms in the Pack system; (2) calculating an average value of the occurrence probabilities of the multiple unsafe failure forms to obtain a thermal runaway occurrence probability P of the Pack system; (3) calculating an estimated occurrence probability Pre of which the thermal runaway occurrence probability P is greater than a constant A according to a formula Pr=sigma

A>P, and diagnosing an unsafe failure form of the Pack system according to the estimated occurrence probability Pre. The method for diagnosing the unsafe failure forms of the Pack system can quickly, effectively, safely and accurately diagnose the unsafe failure forms of the Pack system of an electric vehicle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for diagnosing non-safe failure modes of a Pack system. Background technique [0002] At present, the method commonly used to judge the probability of thermal runaway of the Pack system in electric vehicles is to use corresponding detection devices for targeted detection, such as detecting the water loss and air leakage of the battery through gas sensors, and early warning through smoke detectors. For the fire and smoke of the battery, the expansion and contraction of the battery are detected by the displacement sensor. Although adding the above sensors for detection can detect battery failure in advance and give the failure level according to the failure mode, so as to improve the life of the power system and ensure the safety of property and life. However, due to the backward technology and process of some battery manufacturers on the market, the power batte...

Claims

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Application Information

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IPC IPC(8): G01R31/3842G01R31/389G01R31/392
Inventor 郑庆飞罗明杰谢卿
Owner DONGGUAN POWERWISE TECH CO LTD
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