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Battery control device

  • US 9,685,807 B2
  • Filed: 01/27/2014
  • Issued: 06/20/2017
  • Est. Priority Date: 03/29/2013
  • Status: Active Grant
First Claim
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1. A battery control device comprising:

  • a first memory that stores a plurality of SOC-OCV characteristics, wherein each of the plurality of SOC-OCV characteristics indicates a relationship between an open circuit voltage (OCV), a temperature and a state of charge of battery;

    a second memory that stores a plurality of relationships between a residual capacitance and the OCV;

    a signal communication means that is communicatively coupled to a cell battery controller;

    a voltage detector electrically connected to an assembled battery, wherein the assembled battery includes a plurality of electrically connected batteries;

    a current detector electrically connected to the assembled battery that measures an electric current flowing through the assembled battery; and

    a processor communicatively coupled to the first and second memory, the signal communication means, the voltage detector and the current detector;

    wherein the processor;

    acquires a first voltage from the voltage detector,acquires a first current from current detector,calculates a first OCV based on the first voltage and the first current,determines a first residual capacity for the assembled battery based on the first current,retrieves from the first memory a particular SOC-OCV characteristic based on the first OCV and the first residual capacity,determining if the particular SOC-OCV characteristic has varied based on the first OCV and the first residual capacity,selects a different SOC-OCV characteristic as a selected SOC-OCV characteristic if the particular SOC-OCV is determined to vary,selects the particular SOC-OCV characteristic as the selected SOC-OCV characteristic if the particular is determined to not vary, andautomatically controls the charge and discharge of the assembled battery based on the selected SOC-OCV characteristic.

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