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PROTECTIVE SEMICONDUCTOR APPARATUS FOR AN ASSEMBLED BATTERY, A BATTERY PACK INCLUDING THE PROTECTIVE SEMICONDUCTOR APPARATUS, AND AN ELECTRONIC DEVICE

  • US 20130113493A1
  • Filed: 07/07/2011
  • Published: 05/09/2013
  • Est. Priority Date: 07/14/2010
  • Status: Abandoned Application
First Claim
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1. A protective semiconductor apparatus for protecting an assembled battery including N secondary cells connected in series, the protective semiconductor apparatus comprising:

  • a disconnection detecting circuit including, for each of the N secondary cells, a voltage-sensing resistor configured to divide a voltage of the secondary cells;

    a reference voltage; and

    a first comparator configured to compare a voltage obtained by the voltage-sensing resistor with the reference voltage; and

    a circuit configured to connect an internal resistor having a resistance value smaller than a resistance value of a corresponding one of the voltage-sensing resistors in parallel to the corresponding voltage-sensing resistors successively and selectively at predetermined time intervals,wherein the disconnection detecting circuit is configured to detect disconnection between the N secondary cells and the protective semiconductor apparatus based on an output from the first comparator when the internal resistor is connected in parallel to the corresponding voltage-sensing resistor.

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