Patent ID: 8947052
Filing Date: 2015-02-03
Classification: H01M,H02J,Y02E

Abstract:
1. A charge-discharge control circuit for controlling cycles of charging and discharging of a secondary battery including plural cells, comprising: a cell balance detection circuit that detects that a voltage of at least one of the plural cells reaches a predetermined voltage in a first charging operation; a memory circuit that memorizes a first cell that reaches the predetermined voltage first among the plural cells in the first charging operation; bypass circuits respectively connected to the plural cells in parallel, each of the bypass circuits including a switch unit for bypassing the current that flows through the corresponding cell when charging; and a control circuit that controls, in a second charging operation after the secondary battery charged by the first charging operation is discharged, the switch unit corresponding to the first cell memorized by the memory circuit so that the switch unit corresponding to the first cell is switched on from a start to an end of the second charging operation.