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Battery remaining power calculating method, battery remaining power calculating device, and battery remaining power calculating program

A technology of battery remaining capacity and remaining capacity, applied in the direction of measuring devices, secondary batteries, measuring electrical variables, etc., can solve the problems of poor calculation accuracy and difficult measurement of integral current, etc., to eliminate voltage changes, simplify configuration, and eliminate complex ammeters the desired effect

Active Publication Date: 2006-10-11
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because of poor calculation accuracy of the remaining capacity calculation method, it is difficult to display the remaining capacity to the user more accurately than the remaining capacity display in the current situation
[0010] In addition, when calculating the remaining battery capacity with high precision, both the conventional current integration method and the conventional voltage method require current measurement, and a circuit for current measurement is required
In addition, it is difficult to measure the integrated current with high precision even if this circuit is used in consideration of the characteristics of current changes in mobile phones, etc.

Method used

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  • Battery remaining power calculating method, battery remaining power calculating device, and battery remaining power calculating program
  • Battery remaining power calculating method, battery remaining power calculating device, and battery remaining power calculating program
  • Battery remaining power calculating method, battery remaining power calculating device, and battery remaining power calculating program

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no. 1 example

[0040] will refer to Figures 1 to 5 A portable telephone as an electronic device using the battery remaining capacity calculation method according to the present embodiment as the first embodiment of the present invention will be described. Note that although a cellular phone driven by a battery such as a secondary battery will be described, it need not be mentioned that the present embodiment is applicable to portable electronic equipment other than cellular phones, that is, such as digital cameras, video cameras, etc. , and PDA (Personal Digital Assistant) portable electronic devices.

[0041] figure 1 A block diagram showing a configuration example of a cellular phone that calculates the remaining capacity of a secondary battery using the battery remaining capacity calculation method according to the present embodiment. The cellular phone 11 is composed of a main body unit 21 and a battery unit 22 . The connection between the main body unit 21 and the battery unit 22 i...

no. 2 example

[0073] will refer to Image 6 and Figure 7 A method for calculating the remaining battery capacity using the same reference voltage curve in the low consumption mode and the high consumption mode according to the second embodiment of the present invention will be described. The battery remaining capacity calculation method according to the present embodiment differs from the battery remaining capacity calculation method according to the first embodiment only in the method of calculating the battery remaining capacity in the high consumption mode. Therefore, assuming e.g. reference Figures 1 to 3 The configuration of the portable phone, the reference voltage curve, and the reference table between the remaining capacity level and the voltage value are the same as those in the first embodiment.

[0074] Next, a method of calculating the battery remaining capacity according to the present embodiment will be described. The power consumption of the cellular phone 11 is characte...

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Abstract

Provided are a battery remaining power calculating method, a battery remaining power calculating device, and a battery remaining power calculating program for predicting a remaining capacity of a secondary battery with high accuracy by using a relatively simple circuit structure. Measure the output voltage value of the secondary battery. The use mode is divided into a high consumption mode in which the output current is a predetermined threshold or more and a low consumption mode in which the output current is lower than the predetermined threshold. In the low consumption mode, the remaining power is calculated from the output voltage value and a predetermined reference voltage curve which is a discharge characteristic of the secondary battery. In the high consumption mode, the remaining power is calculated assuming that the change in the remaining power when the low consumption mode is changed to the high consumption mode is almost zero.

Description

technical field [0001] The present invention relates to a battery remaining capacity calculation method, a battery remaining capacity calculating device, and a battery remaining capacity calculation program for calculating the available electric quantity of a secondary battery. Background technique [0002] Portable phones have now incorporated not only conventional calling functions but also e-mail functions, digital camera functions, etc., and thus are becoming multifunctional electronic devices of a high-functionality portable type. A cellular phone is driven by a battery formed of a secondary battery such as a lithium ion secondary battery. In order for the user of the cellular phone to use the cellular phone without worry, it is necessary to inform the user of the precise remaining capacity of the battery. This is because the battery drain of the portable phone is a problem that the user most wants to avoid for a period of time when the user is out, and if the user cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01M10/48
CPCG01R31/3648G01R31/3651G01R31/361G01R31/3624G01R31/3682G01R31/3842G01R31/367G01R31/3646G01R31/3828G01R31/36
Inventor 上坂进一光吉望
Owner MURATA MFG CO LTD
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