jeff@uf.msc.umn.edu (Jeff Turner) (08/21/89)
I am interested in building a NiCd battery "Delta Peak (rapid) Charger." Apparently this type of charger detects a peak in something (voltage?) when the battery is fully charged and automatically shuts off to avoid over charging. I am interested in any information, including pointers to papers or articles on the subject. Thanks. Jeff Turner Minnesota Supercomputer Center, Inc. (612) 626-0544 1200 Washington Avenue South jeff@msc.umn.edu Minneapolis, Minnesota 55415
dmt@PacBell.COM (Dave Turner) (08/22/89)
In article <349@uc.msc.umn.edu> jeff@uf.UUCP (Jeff Turner) writes: >I am interested in building a NiCd battery "Delta Peak (rapid) Charger." >Apparently this type of charger detects a peak in something (voltage?) when the >battery is fully charged and automatically shuts off to avoid over charging. > >I am interested in any information, including pointers to papers or articles >on the subject. Wireless World Nov 1983 has a construction article on such a fast NiCd charger. It alternately charges and discharges the cells until the peak charge and discharge voltages begin to diverge; it then switches to standby. The article claims that it is "capable of charging all common cell types in an hour or so, with a single switch to accommodate batteries of different sizes." The charging is not affected by the number of cells in series. I have not made one of these but except for a few parts substitutions (BC transistors, a diode or two and a toroidal ferrite core) it looks fairly routine. For only &7 (7 pounds) you can order a ready-drilled glass fibre printed circuit board. PS Are we related? -- Dave Turner 415/542-1299 {att,bellcore,sun,ames,decwrl}!pacbell!dmt
barry@hprmokg.HP.COM (Barry Fowler) (08/23/89)
Last month's 73 Magazine (ham radio) has a pulse Ni Cad battery charger design for rapid charging without overheating.