Patent ID: 6227204
Filing Date: 2001-05-08
Classification: H02J,H04R

Abstract:
Charging device for charging of rechargeable NiCd, Ni-metal hydride and lithium batteries of implants by transcutaneous transmission of electric power from an external power transmission part to a power receiving part which forms a part of the implant, the charging device comprising a charging current detector having control means for producing a first charging phase in which a relatively high charging current flow is produced which is limited to a stipulated maximum value and for producing a second charging phase in which the charging current is reduced as compared to the charging current which flows in the first charging phase after the cell voltage of a battery being charged has reached a predetermined limiting charging voltage, the reduced charging current in the second charging phase having a value causing the cell voltage to be kept at least approximately to a predetermined constant voltage value during the second charging phase.