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Flexible evaluation and sorting method for power battery performance

A power battery and battery performance technology, which is applied in the field of flexible evaluation and sorting of power battery performance, can solve problems such as the inability to accurately predict the actual capacity of the battery, and achieve high accuracy and strong adaptability

Active Publication Date: 2021-12-07
蓝谷智慧(北京)能源科技有限公司
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AI Technical Summary

Problems solved by technology

The SOH estimation in the actual strategy is also a simple internal resistance / impedance method, power method, ampere-hour integration method, etc., which cannot accurately predict the actual capacity of the battery and accurately predict the change in battery performance

Method used

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  • Flexible evaluation and sorting method for power battery performance

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Experimental program
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Embodiment 1

[0025] Such as figure 1 As shown, a flexible evaluation and sorting method for power battery performance includes the following parts:

[0026] (1) Battery benchmark model and database establishment

[0027] For the power battery installed or decommissioned on the vehicle, obtain the basic information of the battery: battery manufacturer, battery material, battery nominal voltage, nominal capacity, and connection method. Extract the electrochemical performance data of this battery, that is, the charge and discharge data under the nominal capacity, and the life decay trend data of the battery or corresponding cells under different temperatures, different currents, and different charge and discharge depths.

[0028] According to the battery charging data and life attenuation trend data, analyze the battery performance attenuation mechanism, that is, the factors that affect the battery capacity attenuation and the data on it. The operating temperature T of the battery, the char...

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Abstract

The invention discloses a flexible evaluation and sorting method for power battery performance, including battery benchmark model and database establishment, characteristic parameter acquisition, algorithm evaluation, battery classification strategy, system integration and other parts; the advantage of the invention is: the combination of real-time and historical data The flexible evaluation and grading of the battery can be compatible with different data sources and data types, realizing multi-dimensional evaluation of batteries, and the evaluation time is short and the operation is simple.

Description

technical field [0001] The invention relates to a battery performance evaluation method, in particular to a power battery performance flexible evaluation and sorting method, which belongs to the field of battery performance evaluation methods. Background technique [0002] With the rapid growth of the new energy industry in recent years, the amount of scrapped power batteries will also increase in the future. From 2015 to 2017, the sales of new energy vehicles in my country will continue to increase. According to the operating mileage of about 100,000-200,000 kilometers, the use of 3-5 years It is estimated that 300,000 vehicles will enter the used car market in 2019. According to the 8-year scrapping period, it is estimated that the amount of scrapping in 2019 will reach 322,000 tons. The market is huge, and the recycling and utilization of power batteries is imminent. [0003] For such a large amount of decommissioned batteries, according to the relevant national standards...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07C5/34B07C5/344
CPCB07C5/34B07C5/344
Inventor 范凤松李玉军申子垒张津伟由勇车晓刚董海书陈丽贝张绍贤李晓峰李鹏飞王晓鹏
Owner 蓝谷智慧(北京)能源科技有限公司