A high efficiency Ni-Cd battery charger using stepwise monitoring

Chin E. Lin, C. C. Chieng, J. J. Chang

Research output: Contribution to conferencePaperpeer-review

Abstract

A circuit design for accomplishing high efficiency Ni-Cd battery charging for portable electronic appliances is presented. The proposed method uses a stepwise mV monitoring to trace the battery voltage to determine the state of charging. The control strategy of this charger senses the most important negative delta voltage characteristic of the Ni-Cd batteries. It ensures full recharging under various residual conditions, and maintains battery lifetime. A constant current power supply is applied; this extends the charging capability for different battery voltages. The recharging efficiency was tested and shown to reach above 97% to 105% of the rated specification. The recharging failure rate is approximately 0 to 200 sample tests within 6 months. The proposed circuit design has been fabricated into an integrated circuit.

Original languageEnglish
Pages2461-2465
Number of pages5
Publication statusPublished - 1991 Dec 1
EventProceedings of the 1991 International Conference on Industrial Electronics, Control and Instrumentation - IECON '91 - Kobe, Jpn
Duration: 1991 Oct 281991 Nov 1

Other

OtherProceedings of the 1991 International Conference on Industrial Electronics, Control and Instrumentation - IECON '91
CityKobe, Jpn
Period91-10-2891-11-01

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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