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Battery voltage monitoring apparatus

  • US 10,649,034 B2
  • Filed: 04/15/2016
  • Issued: 05/12/2020
  • Est. Priority Date: 01/05/2007
  • Status: Active Grant
First Claim
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1. A battery voltage monitoring apparatus monitoring a voltage of an assembled battery, the assembled battery including a plurality of battery cells, the battery voltage monitoring apparatus comprising;

  • a first voltage sensor module that monitors voltages of a plurality of battery cells arranged at a high voltage side; and

    a second voltage sensor module that monitors voltages of a plurality of battery cells arranged at a low voltage side,wherein the second voltage sensor module comprises a voltage sensor that is connected to a terminal and detects a voltage of a battery cell connected to the terminal, the terminal being supplied with a power source potential of the second voltage sensor module,wherein the voltage sensor comprises a comparator including a first comparator terminal and a second comparator terminal, the first comparator terminal being supplied with a voltage according to the voltage of the battery cell, the second comparator terminal being supplied with a reference voltage, andwherein the comparator has a hysteresis characteristic and the hysteresis characteristic of the comparator is set according to an output of the comparator evaluated by comparing the reference voltage with a voltage of the terminal which is determined based on the voltage of the battery cell and the power source potential.

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