Patent ID: 7015699
Filing Date: 2006-03-21
Classification: H02J,Y02B,Y04S

Abstract:
1. A standby electric supply for ensuring the power for a load, comprising: an accumulator comprising multiple interconnected blocks; a switching portion that conditionally connects the accumulator to the load or to a charging current supply; a measurement and control portion that produces measurement results for describing the state of the accumulator and that controls the switching portion on the basis of the measurement results produced; wherein the measurement and control portion is arranged: to measure, at an initial time, the block specific initial value of the open cell voltage from the accumulator when charged; to produce from the measured block specific initial value of the open cell voltage a threshold value; to compare a measured block specific open cell voltage value at an observed time different from the initial time with the threshold value; and if the measured block specific open cell voltage value at the observed time has reached the threshold value, to control the switching portion to connect the accumulator to the charging current supply.