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POWER CONTROL DEVICE AND POWER CONTROL METHOD

  • US 20150077063A1
  • Filed: 03/26/2013
  • Published: 03/19/2015
  • Est. Priority Date: 05/11/2012
  • Status: Active Grant
First Claim
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1. A power control device comprising:

  • a relay switch configured to be connected between a battery for supplying a load with electric power and the load, the relay switch being configured to switch between turning electricity on and off from the battery;

    a controller programmed to predict load power characteristics indicating characteristics of power consumed by the load over time, and to predict, based on the predicted load power characteristics, charge/discharge power characteristics indicating characteristics of charge/discharge power of the battery over time;

    a sensor configured to detect voltage between terminals of the battery; and

    a battery controller being operatively coupled to the relay switch, and programmed to selectively control the relay switch,the controller being programmed to specify a voltage detection period from the charge/discharge power characteristics that was predicted, over which the charge/discharge power of the battery is equal to or less than a prescribed power over a prescribed period, andthe battery controller being programmed to turn off the relay switch and to detect the open-circuit voltage based on the voltage between terminals of the battery during the voltage detection period.

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