| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a battery group controller capable of accurately performing cell balancing although the remaining capacity of a secondary battery consisting of the battery group widely varies. <P>SOLUTION: The battery group controller includes a voltage measuring circuit that measures the non-load voltage of all of single batteries at a starting time, a by-pass circuit having by-pass resistances connected in parallel with each single battery and by-pass switches, and a main control section that calculates by-passing timing and controls the corresponding by-pass control switches in ON state in response to the calculated by-pass timing. The CPU of the main control section converts the non-load voltage of each single battery measured in the voltage measuring circuit into a remaining capacity to calculate an average value of the remaining capacities, and controls the corresponding by-pass control switch in ON state for by-pass timing equivalent to a quantity of electricity, which is a different portion with an average value of the converted remaining capacity and calculated remaining capacity with regard to a single battery where a difference with an average value of the converted remaining capacity and calculated remaining capacity exceeds a set value. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
