A diagnostic method for inconsistency of power battery pack parameters

A technology of power battery pack and diagnostic method, applied in battery/fuel cell control device, measurement of electricity, electric vehicle, etc., can solve the problems of inability to realize, unstable, difficult to apply, etc.

Active Publication Date: 2021-05-11
CHONGQING UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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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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  • A diagnostic method for inconsistency of power battery pack parameters
  • A diagnostic method for inconsistency of power battery pack parameters
  • A diagnostic method for inconsistency of power battery pack parameters

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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 inconsistency of parameters of a power battery pack, belonging to the technical field of battery management. The method includes: S1: select power batteries with different initial performances and similar initial performances, use series-parallel connection to form two types of battery packs, and collect their technical parameters; S2: simulate real vehicle conditions on different roads, control The temperature of each monomer in the battery pack, conduct charge and discharge experiments on the power battery pack, collect the voltage, current, and temperature data of each monomer battery, and establish a real vehicle working condition test database; S3: use the feature extraction method to analyze the collected voltage Data processing and feature extraction of the time-domain data of , current, and temperature; S4: Evaluate the consistency of the battery pack by using the weight method for the extracted features, and combine the multi-scale entropy with the artificial neural network to realize the diagnosis of parameter inconsistency. The invention can diagnose the faulty battery in real time, improve the diagnostic accuracy of the parameter inconsistency of the battery group, and facilitate timely maintenance.

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 Patents(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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