CPC G01R 31/392 (2019.01) [G01R 31/389 (2019.01); G01R 31/396 (2019.01); G01R 31/3648 (2013.01)] | 17 Claims |
1. A Backup Battery Unit (BBU) cell comprising:
a battery with an internal impedance;
monitoring circuitry connected to the battery for monitoring a Status of Health (SOH) of the battery, the monitoring circuitry comprising:
a MOSFET, a resistor, and a second resistor connected in series;
a master control unit (MCU) connected to the MOSFET for controlling the MOSFET and determining the SOH of the battery; and
wherein determining the SOH of the battery comprises calculating the internal impedance of the battery using a voltage across the resistor.
|