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Battery state-of-charge correction method and device

A technology of remaining battery power and remaining power, which is applied to measuring devices, measuring electrical variables, measuring electricity, etc., can solve the problem of low calculation accuracy of battery remaining power, and achieve the effect of improving user experience

Active Publication Date: 2014-03-26
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method and device for correcting the remaining battery power, which solves the technical problem that the calculation accuracy of the battery remaining power is not high in the prior art

Method used

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  • Battery state-of-charge correction method and device
  • Battery state-of-charge correction method and device
  • Battery state-of-charge correction method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] figure 1 For the flow chart of the method for correcting the remaining battery power provided by Embodiment 1 of the present invention, please refer to figure 1 , including the following processes:

[0050] S101. Estimate the open circuit voltage of the battery at present (assumed to be time t) to obtain an estimated value OCV of the open circuit voltage t '.

[0051] In the prior art, the open-circuit voltage of the battery is mainly obtained through the following two methods. First, when the device is turned on, before the battery supplies power to any load, it is obtained by detecting the open-circuit voltage of the battery; second, after the device is turned off, After the battery stops supplying power to the load for a period of time, it is obtained by detecting the open circuit voltage of the battery. In this embodiment, the open-circuit voltage of the battery can be estimated according to the battery voltage, the battery current, and the effective resistance v...

Embodiment 2

[0098] figure 2 For the schematic diagram of the device for correcting the remaining battery power provided by Embodiment 2 of the present invention, please refer to figure 2 , the device 2 for correcting the remaining battery power includes an open circuit voltage estimation module 21, a remaining power calculation module 22, a judging module 23 and a correction module 24, wherein,

[0099] The open circuit voltage estimation module 21 is used to estimate the current open circuit voltage of the battery to obtain an estimated open circuit voltage value OCV t ';

[0100] The remaining power calculation module 22 is used for estimating the value OCV according to the open circuit voltage t 'Estimate the current remaining power of the battery to obtain the estimated value of the remaining power SOC t ';

[0101] The judging module 23 is used to estimate the SOC value according to the remaining power t 'Determine whether it is necessary to check the current remaining power v...

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Abstract

The invention discloses a battery state-of-charge correction method and device. The method includes: estimating open-circuit voltage of a current battery to obtain an open-circuit voltage estimated value OCVt'; estimating current state-of-charge of the battery to obtain state-of-charge estimated value SOCt' according to the open-circuit voltage estimated value OCVt'; judging whether current state-of-charge estimated value SOCt needs to be corrected or not according to the state-of-charge estimated value SOCt'; if yes, correcting the current state-of-charge estimated value SOCt. According to the technical scheme, errors of the current state-of-charge reported to users are controlled in a certain range; the technical problems that during long-term use, especially later-period use, of portable devices such as cellphone, personal computer and PAD, aging of battery and key devices causes inaccuracy of state-of-charge calculation and running of high-consumption application causes fluctuation of battery state-of-charge are solved, and user experience is improved.

Description

technical field [0001] The invention relates to the field of power management, in particular to a method and device for correcting the remaining power of a battery. Background technique [0002] Portable devices integrate more and more functions to meet various needs of users. However, the aging effect of batteries and changing loads make it very complicated to track the remaining battery power. [0003] Currently, there are two common ways to know the remaining battery power: [0004] One of them is called the voltage smoothing method. This method collects the current voltage of the battery through the sampling device, subdivides the jumping voltage, and then converts it into the current remaining power through the voltage and power conversion table, and reports it to the user. The smoothing effect of power. However, this method only subdivides the fluctuating voltage when reporting the remaining power to the user, and then converts it into power and reports it to the use...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 邵超杰常学健
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD