Monitoring apparatus and method of battery contact point in charge/discharge system with batteries connected in series

摘要

A monitoring apparatus and method of a battery contact point that autonomously measures contact resistances of a contact terminal for directly connecting a battery for charging/discharging and a circuit in a charge/discharge apparatus for charging/discharging a single secondary battery or a plurality of secondary batteries in series.

主权项

1. A monitoring apparatus, comprising:
a measuring element configured to:
separate a plurality of batteries connected in series from a battery charge/discharge control circuit by operating relays connected to the plurality of batteries, andmeasure a loop resistance of the battery charge/discharge control circuit, exclusive of a battery contact point, using an output voltage and a conducting current of a charge/discharge system while conducting a set current during a period of time; and a calculator configured to:
connect a first battery, among the plurality of batteries, to the battery charge/discharge control circuit by operating a first relay, among the relays, provided for charging/discharging of the first battery,conduct the set current during the period of time,obtain the output voltage of the charge/discharge system measured during the conducting of the set current,obtain a first battery voltage measured by an isolated battery management system (BMS) provided in a first battery contact point of the first battery, andcalculate a contact resistance of the first battery contact point using the measured loop resistance, the output voltage, and the first battery voltage.