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Analogue measurement data detection system and battery voltage detection system

  • US 9,939,470 B2
  • Filed: 03/18/2016
  • Issued: 04/10/2018
  • Est. Priority Date: 06/30/2011
  • Status: Active Grant
First Claim
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1. A battery voltage detection system comprising:

  • a plurality of battery cells included in a battery;

    a selector, to which terminal voltages of the plurality of respective battery cells are inputted and which outputs an analogue signal;

    a reference voltage generation circuit configured to generate and output a variable reference voltage; and

    an analogue/digital converter configured to output a digital signal corresponding to the analogue signal, whereinthe reference voltage generation circuit includes;

    a differential amplifier;

    a first resistor connected between an output terminal and an inverting input terminal of the differential amplifier; and

    a second resistor electrically connected to the inverting input terminal of the differential amplifier and one end of the first resistor, andthe reference voltage generation circuit outputs the variable reference voltage based on a resistance ratio between the first resistor and the second resistor.

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