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Method and system for evaluating capacity fading of power battery

A power battery and capacity attenuation technology, applied in the direction of measuring electrical variables, measuring electricity, and measuring devices, can solve problems such as high cost, high accuracy requirements, and low efficiency, and achieve low cost, high evaluation efficiency, and operability strong effect

Pending Publication Date: 2022-06-21
RAINBOW WIRELESS BEIJING NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The experimental analysis method needs to test the power battery under standard working conditions, and the working conditions of the vehicle power battery are complicated in the actual use process, which is quite different from the standard working conditions, and the test capacity under the standard working conditions cannot be obtained. After the battery is disassembled from the vehicle, it is tested under standard working conditions. The implementability is not strong, and the cost is high and the efficiency is low. The model analysis method requires high accuracy of the model and requires a large amount of offline data for model training. And optimization iteration, large amount of calculation, low efficiency

Method used

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  • Method and system for evaluating capacity fading of power battery
  • Method and system for evaluating capacity fading of power battery
  • Method and system for evaluating capacity fading of power battery

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Embodiment 1

[0049] figure 1 It is a flow chart of the method for evaluating the capacity attenuation of the power battery of the present invention. like figure 1 As shown, the present invention provides a method for evaluating the capacity decay of a power battery, the method comprising the following steps:

[0050] S1: Obtain the uploaded data of the power battery of the vehicle to be evaluated.

[0051] Specifically, the format of the data uploaded by the power battery conforms to the national standard, which includes: reporting time, vehicle state, state of charge, total current, SOC (State of Charge, state of charge of the power battery), the highest and lowest cell voltage and the highest and the minimum temperature, the above data fields are uploaded to the cloud according to the GB / T 32960-2016 standard.

[0052] S2: Preprocessing the uploaded data of the power battery to obtain a data segment of the charging capacity evaluation of the power battery.

[0053] Specifically, the ...

Embodiment 2

[0074] figure 2 It is a schematic diagram of the power battery capacity attenuation evaluation system of the present invention. like figure 2 As shown, the present invention also provides a power battery capacity attenuation evaluation system, the system includes:

[0075] The first acquisition module 201 is used to acquire the power battery upload data of the vehicle to be evaluated;

[0076] a data preprocessing module 202, configured to preprocess the uploaded data of the power battery to obtain a data segment of the charging capacity evaluation of the power battery;

[0077] The second obtaining module 203 is configured to obtain the initial full charge capacity and the current full charge capacity of the power battery of the vehicle to be evaluated according to the charge capacity evaluation data segment;

[0078] The capacity evaluation module 204 is configured to evaluate the capacity decay condition of the power battery of the vehicle to be evaluated according to ...

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Abstract

The invention relates to a power battery capacity fading evaluation method and system, and belongs to the technical field of power batteries. The method comprises the following steps: acquiring power battery uploading data of a to-be-evaluated vehicle; preprocessing the uploaded data of the power battery to obtain a charging capacity evaluation data fragment of the power battery; according to the charging capacity evaluation data fragment, obtaining the initial full-charge capacity and the current full-charge capacity of the to-be-evaluated vehicle power battery; and evaluating the power battery capacity attenuation condition of the vehicle to be evaluated according to the initial full charge capacity and the current full charge capacity to obtain an evaluation result. The method for evaluating the capacity fading of the power battery is high in operability, low in cost and high in evaluation efficiency.

Description

technical field [0001] The invention belongs to the technical field of power batteries, and in particular relates to a method and system for evaluating the capacity attenuation of a power battery. Background technique [0002] In recent years, my country's new energy vehicles have developed rapidly. In 2021, the sales of new energy vehicles will be 3.52 million, accounting for about 13% of the total vehicle sales. It has maintained rapid growth for many years. The number of new energy vehicles has also increased year by year. 10,000 vehicles. With the development of new energy vehicles, the safety, quality and service life of key components have also attracted more and more attention. As the core component of new energy vehicles, especially pure electric vehicles, power battery status evaluation and fault detection have always been the focus of new energy vehicle development and research. The capacity of the power battery reflects the size of its energy storage capacity. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/388G01R31/389G01R31/392G01R31/396
CPCG01R31/388G01R31/389G01R31/392G01R31/396
Inventor 黄亮
Owner RAINBOW WIRELESS BEIJING NEW TECH CO LTD
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