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POWER SUPPLY DEVICE FOR DETECTING DISCONNECTION OF VOLTAGE DETECTION LINES

  • US 20120025836A1
  • Filed: 07/29/2011
  • Published: 02/02/2012
  • Est. Priority Date: 07/30/2010
  • Status: Active Grant
First Claim
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1. A power supply device comprising a plurality of battery units, wherein each of the battery unit comprising:

  • a battery block that includes a plurality of battery cells serially connected to each other;

    a voltage detecting circuit that detects the voltages of the battery cells, which constitute the battery block, through voltage detection lines;

    a power supply circuit that supplies electric power for operating the voltage detecting circuit from the battery block; and

    a disconnection detecting circuit that detects disconnection of said voltage detection lines based on the detection voltages of the battery cells, which are detected by said voltage detecting circuit,wherein the battery blocks of the battery units are serially connected to each other to constitute a battery pack,wherein at least one of the battery blocks of the battery units includes an unbalance resistor that is connected to the at least one of the battery blocks to increase the power consumption of the at least one of the battery blocks so that a current flows in the voltage detection line that is connected to a node between the at least one of the battery blocks and an adjacent block of the battery blocks, which is connected next to the at least one of the battery blocks to which said unbalance resistor connected.

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