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Energy storage battery early fault fusion diagnosis method and safety early warning system

A technology for energy storage batteries and early failures, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of not being able to adapt to the engineering environment, the accuracy rate is far apart, and the influence of sequence variance, so as to achieve strong robustness and noise Small impact and good stability

Pending Publication Date: 2021-09-24
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is theoretically feasible, it cannot adapt to complex and changeable engineering environments.
In practical applications, additive noise can easily affect the variance of the sequence, leading to the occurrence of misdiagnosed segments, which leads to the accuracy of the method in the application will be far from the expected effect

Method used

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  • Energy storage battery early fault fusion diagnosis method and safety early warning system
  • Energy storage battery early fault fusion diagnosis method and safety early warning system
  • Energy storage battery early fault fusion diagnosis method and safety early warning system

Examples

Experimental program
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Embodiment 1

[0037] This embodiment discloses an early fault fusion diagnosis method for an energy storage battery, including:

[0038] The time series of the variance is obtained by calculating the variance of the series module voltage in real time. This time series has the characteristic that the complexity will increase when a certain battery fails. Use the sample entropy to evaluate the complexity of the sequence, and then judge whether there is a battery module failure.

[0039] For specific types of faults that do not cause an increase in the complexity of the time series, such as short circuits with increasing degrees, poor contact of sensors (the measured value of voltage does not change with the actual voltage value), etc., it is often difficult to find it only by using the sample entropy method. Two solutions to this problem are proposed here. One is to design another detector sensitive to the above faults in parallel with the sample entropy detector to achieve full fault diagno...

Embodiment 2

[0086] The purpose of this embodiment is to provide a computing device, which includes a memory, a processor, and a computer program stored in the memory and operable on the processor. The processor implements the steps of the above method when executing the program.

Embodiment 3

[0088] The purpose of this embodiment is to provide a computer-readable storage medium.

[0089] A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above-mentioned method are executed.

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Abstract

The invention provides an energy storage battery early fault fusion diagnosis method and a safety early warning system, and the method comprises the steps: obtaining the voltage of a series battery module, calculating the variance of the voltage of the series battery module, and obtaining a sequence with the complexity rising during a fault; and evaluating the complexity of the sequence by using the sample entropy, so that the full fault diagnosis of the battery module can be realized. According to the battery early-stage tiny fault diagnosis method based on transverse variance and longitudinal sample entropy fusion, the battery tiny fault can be effectively diagnosed, the robustness is high, and the noise influence is small.

Description

technical field [0001] The disclosure belongs to the technical field of battery fault diagnosis, and in particular relates to an early fault fusion diagnosis method of an energy storage battery and a safety early warning system. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The safety of power batteries has become a bottleneck restricting the development of the new energy vehicle industry. Any failure or safety hazard of the battery system, if not diagnosed in time and effectively dealt with, may trigger a chain reaction and even lead to catastrophic consequences. Therefore, it is the key to ensure the safe operation of the power battery to detect the early minor faults of the battery in time and accurately find out the root cause of the fault. However, the existing methods have insufficient ability to predict faults and cannot meet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/385G01R31/396
CPCG01R31/396G01R31/385
Inventor 张承慧李京伦商云龙李世鹏段彬张奇
Owner SHANDONG UNIV
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