MONITORING APPARATUS AND METHOD OF BATTERY CONTACT POINT IN CHARGE/DISCHARGE SYSTEM WITH BATTERIES CONNECTED IN SERIES
First Claim
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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.
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Abstract
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.
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Citations
14 Claims
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1. A monitoring apparatus, comprising:
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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, and measure 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, and calculate a contact resistance of the first battery contact point using the measured loop resistance, the output voltage, and the first battery voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14)
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8. A monitoring method comprising:
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separating a plurality of batteries connected in series from a battery charge/discharge control circuit by operating relays connected to the plurality of batteries; measuring 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; connecting 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; conducting the set current during the period of time; obtaining the output voltage of the charge/discharge system measured during the conducting of the set current; obtaining a first battery voltage measured by an isolated battery management system (BMS) provided in a first battery contact point of the first battery; and calculate a contact resistance of the first battery contact point using the measured loop resistance, the output voltage, and the first battery voltage.
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Specification