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BATTERY VOLTAGE MONITORING DEVICE

  • US 20120046893A1
  • Filed: 05/19/2010
  • Published: 02/23/2012
  • Est. Priority Date: 05/20/2009
  • Status: Active Grant
First Claim
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1. A battery voltage monitoring device for monitoring an output voltage of a unit cell or unit cells in each of battery modules that are connected in series, comprising:

  • integrated circuits, each of which samples and holds the output voltage of the unit cell or unit cells in each of the battery modules;

    a cascade communication circuit that connects the integrated circuits in series to transmit signals to the integrated circuits according to a connection order of the integrated circuits; and

    a programmable controller connected to an integrated circuit located at an upstream end of the cascade communication circuit and an integrated circuit located at a downstream end of the cascade communication circuit with respect to signal transmission;

    wherein the controller is programmed to;

    output a voltage sampling and holding command signal to the integrated circuit at the upstream end such that the voltage sampling and holding command signal be transmitted to each of the integrated circuits via the cascade communication circuit, the voltage sampling and holding command signal commanding each of the integrated circuits to sample and hold output voltage of the unit cell or unit cells in each of the battery modules; and

    output a transmission command signal to the integrated circuit at the upstream end such that the transmission command signal be transmitted via the the cascade communication circuit to each of the integrated circuits after transmission of the voltage sampling and holding command signal, the transmission command signal commanding each of the integrated circuits to transmit output voltage held by each of the integrated circuits to the controller via the cascade communication circuit.

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