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Device and process for charging of rechargeable batteries of implants

  • US 6,227,204 B1
  • Filed: 05/14/1999
  • Issued: 05/08/2001
  • Est. Priority Date: 08/21/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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