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SOC-OCV curve cluster calibration method, SOC correction method and SOC correction device of lithium battery

A technology of SOC-OCV and calibration method, which is applied in the field of calibration of lithium battery SOC-OCV curve clusters, can solve the problems of inaccurate SOC-OCV calibration curve and large error of battery SOC estimation, so as to reduce estimation error and improve accuracy Effect

Active Publication Date: 2019-06-07
XUJI GRP +4
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Problems solved by technology

[0005] The purpose of the present invention is to provide a calibration method, SOC correction method and device for lithium battery SOC-OCV curve clusters, which are used to solve the problem of inaccurate SOC-OCV correction curves due to ignoring the influence of the resting time on the battery open circuit voltage OCV problem, and the problem of relatively large estimation error of battery SOC

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  • SOC-OCV curve cluster calibration method, SOC correction method and SOC correction device of lithium battery
  • SOC-OCV curve cluster calibration method, SOC correction method and SOC correction device of lithium battery
  • SOC-OCV curve cluster calibration method, SOC correction method and SOC correction device of lithium battery

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Example of calibration method for lithium battery SOC-OCV curve cluster:

[0033] This embodiment provides a calibration method for the SOC-OCV curve cluster of a lithium battery. According to the size of the battery resting time, the calibration method correspondingly obtains the charging SOC-OCV corresponding to different resting times within the set resting time range. OCV curve and discharge SOC-OCV curve, and then form a lithium battery SOC-OCV curve cluster, the specific steps are as follows:

[0034] (1) Set the resting time as the first setting time, and obtain the charging SOC-OCV curve A with the resting time as the first setting time respectively 充 and discharge SOC-OCV curve A 放 .

[0035] Among them, the charging SOC...

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Abstract

The invention relates to an SOC-OCV curve cluster calibration method, an SOC correction method and an SOC correction device of a lithium battery. The calibration method comprises that standing time isset as first setting time, and a charging SOC-OCV curve charging A and a discharging SOC-OCV curve discharging A within the standing time of the first setting time are obtained; and according to thecharging SOC-OCV curve charging A and the discharging SOC-OCV curve discharging A within the first setting time, corresponding charging SOC-OCV curve and discharging SOC-OCV curve when the standing time is greater than the first setting time are calculated within the set standing time range, and further an SOC-OCV curve cluster of the lithium battery is obtained. The charging SOC-OCV curve and thedischarging SOC-OCV curve corresponding to different standing time are obtained according to the different standing time, the SOC-OCV curve cluster of the lithium battery is formed, influence of thestanding time on the open circuit voltage OCV of the battery is taken into full consideration, and the accuracy of the SOC-OCV curve is improved effectively.

Description

technical field [0001] The invention relates to a calibration method for a lithium battery SOC-OCV curve cluster, an SOC correction method and a device, and belongs to the technical field of batteries. Background technique [0002] Lithium-ion batteries are widely used in many fields such as electric vehicles, energy storage, and portable electronics because of their high energy density and long cycle life. During the use of the battery, its state of charge is an important indicator, that is, the ratio of the actual power that can be provided in the current state to the power that can be fully charged, expressed in SOC (state of charge). The remaining power of the battery in the current state can be known through the SOC value, which is convenient for the battery management system to issue various instructions to the battery. The open circuit voltage, that is, the terminal voltage of the battery in the open circuit state, is represented by OCV (open circuit voltage). It is ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/388G01R31/378H01M10/44
CPCY02E60/10
Inventor 郭宝甫张鹏栗磊曹新慧王卫星田盈谢青松王法宁陈玉玺苑军军
Owner XUJI GRP
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