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Battery remaining capacity measuring method and system

A technology of battery remaining power and measurement method, which is applied in the direction of measuring electricity, measuring device, measuring electrical variables, etc., and can solve problems such as errors

Active Publication Date: 2015-04-22
湖南容创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a battery residual power measurement method and system capable of accurately measuring battery SOC to solve the problem of large errors in existing battery SOC measurement methods

Method used

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  • Battery remaining capacity measuring method and system
  • Battery remaining capacity measuring method and system
  • Battery remaining capacity measuring method and system

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Embodiment Construction

[0032] 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 according to the drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0033] The method and system for measuring the remaining battery power of the present invention are realized by the applicant based on the following theoretical research:

[0034] SOC means state of charge. When the battery is used for a period of time or left unused for a long time, the ratio of the remaining capacity to the capacity of the fully charged state is usually expressed as a percentage.

[0035] As we all know, the current integration method works very well when the battery is fully charged and just charged. The discharge phenomenon will become very obvious. Therefore, a method must be used to corre...

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Abstract

The invention provides a battery remaining capacity measuring method and system. The method comprises the steps that firstly, the corresponding relations between SOCs and end voltages of a battery under a constant charge-discharge current at different temperatures are obtained through the two-dimensional interpolation algorithm; secondly, the corresponding relations between the SOCs, the charge-discharge current, the temperatures and the end voltages of the battery are integrated, and the charge-discharge current, the current temperature and the end voltage value of the battery are integrated; thirdly, according to the charge-discharge current, the current temperature and the end voltage value of the battery, a current battery voltage method SOCE is calculated; fourthly, SOC calculation is conducted on the battery through a current integration method to obtain a current integration method SOCC of the battery, and the voltage method SOCE and the current integration method SOCC are subjected to weighted integration to obtain the SOC value of the battery.

Description

technical field [0001] The invention relates to the technical field of battery management systems, in particular to a method and system for measuring remaining battery power. Background technique [0002] In today's high-tech age, portable devices such as mobile phones, PDAs, notebook computers, medical equipment, and measuring instruments are ubiquitous. With the development of more and more portable applications towards diversification, specialization and individualization, one thing remains unchanged, that is, all portable devices are powered by batteries. The battery is a widely used battery. Accurately estimating the SOC (state of charge, state of charge) of the battery has always been the most critical technology in the battery management system. Since the estimation of SOC is affected by the nonlinear characteristics of the battery and many other factors, improving the accuracy of SOC estimation has always been a difficult point in the battery management system. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 林勇胡志坤毛龙曹流崔彬方喜林王可志
Owner 湖南容创科技有限公司