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Battery management system and method of controlling the same

  • US 9,170,305 B2
  • Filed: 02/14/2012
  • Issued: 10/27/2015
  • Est. Priority Date: 04/07/2011
  • Status: Active Grant
First Claim
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1. A battery management system (BMS) of an electric vehicle having a battery, the BMS comprising:

  • a reference setup unit configured to set a charge completion value used to calculate a state of health (SOH) of the battery, wherein the battery comprises one or more battery packs each including a plurality of battery cells;

    a charge amount calculation unit configured to calculate an amount actually charged in the battery from a first point in time when charging of the battery begins to a second point in time when the battery charging actually reaches the charge completion value; and

    an SOH calculation unit configured to calculate the SOH of the battery, while the battery is being charged, wherein the SOH of the battery is calculated based on a ratio of i) the amount actually charged in the battery to ii) a preset charge amount expected to be charged from the first point in time to the second point in time,wherein the charge completion value is a state of charge (SOC) which is lower than 100%,or a voltage of the battery which is lower than the voltage when the battery is fully charged.

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