Battery monitoring system and semiconductor device

摘要

A battery monitoring system includes a plurality of battery cells connected in series and including a first battery cell at a highest potential; a discharge circuit connected to a high potential side of the first battery cell through a first line; a circuit connected to the high potential side of the first battery cell through a second line; and a plurality of electro-static protection circuits each including one end portion connected to at least one of a high potential side and a low potential side of each of the battery cells, and another end portion connected to the first line.

主权项

1. A battery monitoring system comprising:
a plurality of battery cells connected in series and including a first battery cell at a highest potential and a second battery cell at a lowest potential; a first line having a first terminal connected to a high potential side of the first battery cell through a first filter, said first filter being connected to a low potential side of the second battery cell; a second line having a second terminal connected to the high potential side of the first battery cell through a second filter, said second filter being connected to the low potential side of the second battery cell; a third line having a third terminal connected to the low potential side of the second battery cell; a discharge circuit disposed between the first line and the third line; a circuit disposed between the second line and the third line, said circuit being configured to measure a voltage of the battery cells when an electrical current flows through the circuit; and a plurality of electro-static protection circuits each including one end portion connected to at least one of a high potential side and a low potential side of each of the battery cells, and another end portion connected to the first line so that the discharge circuit can discharge the electro-static protection circuits.