×

Battery System for Vehicle

  • US 20120025769A1
  • Filed: 02/18/2010
  • Published: 02/02/2012
  • Est. Priority Date: 03/26/2009
  • Status: Active Grant
First Claim
Patent Images

1. A battery system for a vehicle, comprising:

  • a battery unit in which a plurality of cell groups are electrically connected in series, with a plurality of battery cells being electrically connected in series in each cell group;

    integrated circuits provided for the cell groups respectively, each of which measures the terminal voltage of each battery cell included in its cell group via a measurement line, and outputs battery cell information; and

    a control circuit that monitors states of the battery cells based on battery cell informations from the integrated circuits;

    wherein each of the integrated circuits comprises a measurement circuit that measures respective terminal voltages of battery cells in its cell group, and discharge circuits provided for each battery cell, each of which discharges its battery cell via measurement lines for that battery cell;

    and the control circuit transmits to each of the integrated circuits;

    a first discharge command that causes odd numbered battery cells of its cell group to be discharged;

    a first transmission command that causes terminal voltages of only the odd numbered battery cells, measured during execution of the first discharge command, to be sent to the control circuit;

    a second discharge command that causes even numbered battery cells of its cell group to be discharged; and

    a second transmission command that causes terminal voltages of only the even numbered battery cells, measured during execution of the second discharge command, to be sent to the control circuit;

    and diagnoses abnormality of a system including the battery cells, the measurement lines, and the discharge circuits based on the terminal voltages sent from each of the integrated circuits.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×