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Battery SOH (State of Health) estimation method and equipment

A battery and voltage technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of measurement result error, long test cycle, and inability to measure the battery in real time online, so as to achieve accurate measurement results, real-time discrimination, Realize the effect of online real-time measurement

Inactive Publication Date: 2019-11-12
优必爱信息技术(北京)有限公司
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Problems solved by technology

[0003] In related technologies, battery SOH is mainly evaluated based on the laboratory test environment, usually using capacity decay method, partial discharge method, etc. These methods are mainly based on battery cycle charge and discharge tests to analyze changes in battery characteristics , so as to estimate the SOH of the battery. This method not only has a long test period, but also cannot perform online real-time measurement of the battery, resulting in errors in the measurement results.

Method used

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  • Battery SOH (State of Health) estimation method and equipment
  • Battery SOH (State of Health) estimation method and equipment
  • Battery SOH (State of Health) estimation method and equipment

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Embodiment

[0053] figure 1 It is a schematic flowchart of a battery SOH estimation method provided by an embodiment of the present invention. Such as figure 1 As shown, this embodiment provides a battery SOH estimation method, including:

[0054] Step 101, acquiring online data of the battery under test.

[0055] In some embodiments, the online data may include battery voltage, current, real-time battery capacity (State of Charge, SOC) and the like.

[0056] Step 102: Calculate and obtain model input variables of the battery under test according to the online data, where the model input variables are feature quantities extracted from the IC curve of the battery under test;

[0057]In some embodiments, there are many ways to calculate the input variables of the battery model. For example, you can first draw the voltage-power curve of the battery under test through the voltage in the online data and the real-time power of the battery, and then convert the voltage-power curve into IC cu...

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Abstract

The invention relates to a battery SOH (State of Health) estimation method and equipment, which are applied to the technical field of batteries, wherein the method comprises the following steps: acquiring online data of a tested battery; calculating to obtain a model input variable of the tested battery according to the online data, wherein the model input variable is the characteristic quantity extracted according to an IC curve of the tested battery; and inputting the model input variable of the tested battery into a pre-trained battery SOH judging model to determine SOH classification of the tested battery, wherein various kinds of SOH classifications are provided. The SOH of the battery can be directly obtained according to the online data, the time for testing in a laboratory is saved, the test period is shortened, the model input variable is finally obtained through calculation of the online data, the model input variable is input to the battery SOH judging model, so that the SOHclassification of the SOH of the tested battery can be directly determined, real-time judgement of the SOH of the battery is realized, and convenience is brought for operation.

Description

technical field [0001] The present invention relates to the technical field of batteries, in particular to a battery SOH estimation method and equipment. Background technique [0002] With the promotion of the new energy vehicle market and the improvement of user awareness, the sales of electric vehicles are increasing year by year. The main source of power is batteries, and its SOH (State Of Health) has an important impact on the use and development of electric vehicles. Therefore, , the SOH evaluation of electric vehicle power batteries is particularly important. [0003] In related technologies, battery SOH is mainly evaluated based on the laboratory test environment, usually using capacity decay method, partial discharge method, etc. These methods are mainly based on battery cycle charge and discharge tests to analyze changes in battery characteristics , so as to estimate the SOH of the battery. This method not only has a long test period, but also cannot perform online...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/367
CPCG01R31/367G01R31/392
Inventor 王志刚朱瑞
Owner 优必爱信息技术(北京)有限公司
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