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Method for diagnosing parameter inconsistency of power battery packs

A technology of a power battery pack and a diagnostic method, which is applied in the direction of battery/fuel cell control devices, measuring electricity, electric vehicles, etc., can solve problems such as difficult application, impossibility, and instability, and achieve easy maintenance means and easy implementation Effect

Active Publication Date: 2019-07-23
CHONGQING UNIV +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to apply in engineering, and there may be instability when applied to real vehicle conditions, or even impossible

Method used

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  • Method for diagnosing parameter inconsistency of power battery packs
  • Method for diagnosing parameter inconsistency of power battery packs
  • Method for diagnosing parameter inconsistency of power battery packs

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Embodiment Construction

[0052] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0053] see Figure 1 ~ Figure 3 , figure 1 The method for diagnosing the inconsistency of a power battery pack parameter according to the present invention ...

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Abstract

The invention relates to a method for diagnosing the parameter inconsistency of power battery packs, and belongs to the technical field of battery management. The method comprises the following steps:S1: selecting power batteries having different initial performance and similar initial performance, forming two types of battery packs in a series parallel manner, and collecting technical parametersthereof; S2: simulating real vehicle working conditions under different roads, controlling the temperature of each monomer in the battery packs, performing a charge-discharge experiment on the powerbattery packs, collecting the voltage, current and temperature data of each battery cell, and establishing a real vehicle working condition test database; S3: performing data processing and feature extraction on time domain data of the collected voltage, current and temperature by using a feature extraction method; and S4, evaluating the consistency of the battery packs for the extracted featuresby using a weight method, and achieving parameter inconsistency diagnosis by combining a multi-scale entropy with an artificial neural network. By adoption of the method provided by the invention, faulty batteries can be diagnosed in real time, the diagnosis accuracy of the parameter inconsistency of the battery packs is improved, and timely maintenance is facilitated.

Description

technical field [0001] The invention belongs to the technical field of battery management, and relates to a method for diagnosing the inconsistency of parameters of a power battery pack. Background technique [0002] In order to meet the energy and power requirements of the vehicle, the vehicle power battery usually needs to form a battery pack by connecting hundreds or thousands of single cells in series and parallel. The energy density, safety, durability and other performance of the grouped battery packs will decrease to a certain extent compared with the monomers. The main reason for this phenomenon is the inconsistency between the power battery packs. Accurately diagnosing the inconsistency parameters of the battery pack can better provide a basis for maintaining the battery pack and prevent the inconsistency from increasing. [0003] The inconsistency of the battery pack mainly comes from two aspects. On the one hand, in terms of production and manufacturing, the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/396G01R31/367B60L58/10
CPCB60L58/10G01R31/367G01R31/396Y02T10/70
Inventor 冯飞胡晓松胡凤玲刘波杨辉前陈六平张小川谢翌唐小林杨亚联
Owner CHONGQING UNIV
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