Battery voltage measuring system

Inactive Publication Date: 2008-07-17
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022]In the present invention, by setting a value of the voltage between the terminals to be a s

Problems solved by technology

In this case, scale of circuit becomes large,

Method used

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  • Battery voltage measuring system
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Embodiment Construction

[0041]Hereinafter, a battery voltage measuring system according to embodiments of the present invention will be described in detail with reference to the attached figures.

[0042]FIG. 5 shows a configuration of the battery voltage measuring system 10 according to the embodiments of the present invention. The battery voltage measuring system 10 is composed of a battery 5, and a battery voltage measuring circuit 100. The battery 5 is connected to a load circuit 500. The battery voltage measuring circuit 100 is realized as an integrated circuit (IC) in this example but may be realized by individual circuits. The battery voltage measuring circuit 100 has reference voltage sources 1 and 4, an analog / digital (A / D) converter 6 and a control unit 20.

[0043]The battery voltage measuring circuit 100 according to a first embodiment of the present invention is separated from a mobile device in which the battery 5 is installed. The battery voltage measuring circuit 100 according to a second embodi

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Abstract

A battery voltage measuring system includes an analog/digital converter configured to receive a higher reference voltage and a lower reference voltage which is lower than the higher reference voltage and to outputs a digital output value based on an input voltage which is lower than the high voltage reference voltage and is higher than the low voltage reference voltage. A battery supplies a battery voltage as the higher reference voltage to the analog/digital converter; a first power supply supplies a first reference voltage as the input voltage to the analog/digital converter; and a second power supply supplies a second reference voltage as the lower reference voltage to the analog/digital converter.

Description

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Claims

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Application Information

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Owner RENESAS ELECTRONICS CORP
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