Charging apparatus

Abstract

There is provided a charging apparatus, which uses a charging control timer having a relatively simple constitution, capable of preventing an overcharge of a secondary battery while detecting the overcharge of the secondary battery even if a charge current value is relatively small. The charging apparatus that discontinues the charging in a preset expiration time period of a timer has a variable controller for controlling the preset expiration time period of a timer in response to an interrupted time if the charging operation that is interrupted before reaching the preset expiration time of a timer is started again.

1 . A charging apparatus that discontinues a charging operation at a preset expiration time period of a timer, the charging apparatus comprising: 
 variable control means for controlling the preset expiration time period in response to an interrupted time if the charging operation is interrupted before reaching the preset expiration time period of a timer.    
     
     
         2 . The charging apparatus according to  claim 1 , wherein the charging apparatus continues a trickle charging after the expiration time period of a timer.  
     
     
         3 . The charging apparatus according to  claim 2 , wherein the trickle charging after the expiration time period of a timer is a pulse charging.  
     
     
         4 . The charging apparatus that discontinues a charging operation at a preset expiration time period of a timer, the charging apparatus comprising: 
 variable controller for controlling the preset expiration time period in response to an interrupted time if the charging operation is interrupted before reaching the preset expiration time period of a timer.