Provided is a power storage apparatus having an impedance measuring function and is capable of, when the apparatus has a large number of power storage elements connected in series, judging a deteriorated power storage element in a short period of time. The...

The protective circuit has predetermined number of single cells, which are successively switched in two cell rows (A,B,C,D), which lie parallel to each other. A phase current (Ia,Ib,Ic,Id) flowing while loading the battery pack in one cell row is compared ...

A car battery function monitoring system creates a state of function value indicating the probability of holding a minimum energy from a combination of the state of charge (SOC) and state of health characteristic values based on comparisons with actual, cr...