Patent ID: 6066939
Filing Date: 2000-05-23
Classification: H02J

Abstract:
A secondary battery pack comprising:first and second terminal portions connected to one of a load device and a charging device;a secondary battery;voltage detecting means for detecting a voltage level applied to said secondary battery and a battery voltage level of said secondary battery;switch means connected between one of said first and said second terminal portions and said secondary battery, said switch means being controlled to be in a disconnected state when said voltage detecting means detects a first voltage level; anda charging circuit connected between one of said first and said second terminal portions and said secondary battery, said charging circuit being controlled based on a voltage level detected by said voltage detecting means with reference to a second voltage level lower than said first voltage level by a predetermined voltage level, whereinsaid voltage detecting means includes first detecting means for detecting said voltage level applied to said secondary battery and second detecting means for detecting said battery voltage level of said secondary battery,said switch means is controlled to be in a disconnected state when said first detecting means detects said first voltage level,said charging circuit is controlled when said first detecting means detects said second voltage level, andsaid switch means is controlled when said second detecting means detects a voltage level higher than said first voltage level.