Battery charging device

摘要

In a battery charging device(10)capable of detecting abnormalities in cells comprising batteries through a simple arrangement and terminating charge accordingly, cell temperature information Ta and cell temperature information Tb in charging operation within respective blocks A and B are detected through temperature sensors TM1, TM2 and a temperature detecting portion (38) incorporated in a battery package (50), the cell temperature information Ta of block A and cell temperature information Tb of block B are compared through a comparing/determining portion (35) wherein upon determining that temperature difference information Tdf is exceeding reference information for comparison Tref, instructions for terminating charging operations are sent from a control portion (36) to a charge current controlling portion (34) assuming that abnormalities have occurred in the cells comprising the block A or block B during charging operations. With this arrangement, it is possible to detect a block including abnormal cells whose temperature does not rise or fall within a specified range together with remaining cells within the same block and to detect inconveniences of charge circuits or the like that performs charge upon division into blocks, and to terminate charging operations for the battery package (50).