Arrangement and method for determining the state of a battery based on a capacity of the battery

摘要

A method for determining the state of a battery comprising at least two battery strings, wherein said battery strings are connected to a load and to a power supply unit, the method comprising: disconnecting (401) at least one first battery strings from said load; reducing (402) an output voltage of said power supply unit to said load below a first threshold value; discharging (403) at least one second battery string to said load; monitoring (404) the discharging of the at least one second battery string; determining (405) a capacity of said at least one second battery string based on at least in part the monitoring of discharging; and reconnecting (406) said at least one first battery strings to said power supply unit and to said load.

主权项

1. A method for determining the state of a battery comprising at least two battery strings, wherein said battery strings are connected to a load and to a power supply unit, the method comprising:
disconnecting at least one first battery string from said load; reducing an output voltage of said power supply unit to said load below a first threshold value; discharging at least one second battery string to said load; monitoring the discharging of the at least one second battery string; determining a capacity of said at least one second battery string based on at least in part the monitoring of discharging; detecting whether a power from a utility line to said power supply unit is interrupted; and reconnecting said at least one first battery string to said load if the power from said utility line to said power supply unit is interrupted.