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Power battery consistency detection method

A power battery and detection method technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as accurate analysis troubles, noisy data, etc., and achieve accurate consistency detection results, strong interpretability, and solid statistics The effect of theoretical support

Pending Publication Date: 2021-10-22
上海电享信息科技有限公司
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Problems solved by technology

It is difficult to analyze the data obtained by BMS, because different operating conditions will bring more noise data, which has caused certain troubles for accurate analysis. Voltage data without long-term charge and discharge tests, BMS voltage consistency has become an important means of power battery consistency analysis

Method used

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  • Power battery consistency detection method

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Embodiment 1

[0034] Embodiment 1: The power battery pack is composed of several single cells. In order to detect the consistency of each single battery in the power battery pack, the following power battery consistency detection method is adopted.

[0035] as attached figure 2 As shown, the power battery consistency detection method includes two parts: the noise reduction self-encoding training step and the consistency detection and positioning step. The flow of the noise reduction self-encoding training step is shown in the attached figure 2 As shown in the left half of the middle, the flow of the consistency detection and positioning steps is shown in the attached figure 2 As shown in the right half of the middle, the power battery consistency detection method will be described in detail below.

[0036] 1. Noise reduction autoencoder training

[0037] The denoising autoencoder training step consists of the following steps:

[0038] Step 1-1: The time-series data of multiple single ...

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Abstract

The invention relates to a power battery consistency detection method. The method comprises a noise reduction self-coding training step and a consistency detection positioning step. The noise reduction self-coding training step comprises the steps of obtaining sample time sequence data and obtaining corresponding sample feature data, and training the noise reduction self-coding model by using the sample feature data to obtain the noise reduction self-coding model for detection. The consistency detection positioning step comprises the steps of obtaining time sequence data to be detected and obtaining corresponding feature data to be detected, inputting the feature data to be detected into the noise reduction self-coding model for detection and obtaining noise reduction single battery voltage time sequence data, and performing single-factor variance analysis on the noise reduction single battery voltage time sequence data to obtain a single-factor variance analysis p value; and based on the single factor variance analysis p value, judging whether the power battery pack has inter-pack significant difference, and if so, performing multiple comparative analysis on the power battery pack to determine the position of a single battery with a consistency problem in the power battery pack. The method is accurate in detection result, high in interpretability and high in reliability.

Description

technical field [0001] The invention belongs to the technical field of power battery detection, and in particular relates to a method for detecting the consistency of a power battery. Background technique [0002] Consistency is one of the manifestations of power battery performance. Consistency mainly refers to the voltage and charge, capacity and its decline rate, internal resistance and its change rate, and service life after the single batteries of the same specification and type form a power battery pack. , Temperature influence, self-discharge rate and other parameters have certain differences, the smaller the difference, the better the consistency. [0003] The consistency of the power battery pack is a very important issue. Poor consistency will not only affect the power output and endurance performance of the battery pack, but also affect the operation safety of the battery pack and shorten the service life of the power battery pack. [0004] The consistency of the...

Claims

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Application Information

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IPC IPC(8): G01R31/396G01R31/367G01R31/385G01R31/36G01R31/387G01R31/00
CPCG01R31/396G01R31/367G01R31/385G01R31/3648G01R31/387G01R31/006
Inventor 赵建强钱磊朱卓敏
Owner 上海电享信息科技有限公司
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