High Speed NiCd Charger for R/C

Posted on Oct 4, 2012

It can safely charge a 7-cell RC2000 pack in about 14 minutes, and an RC2400 or CP2400SCR pack in about 17 minutes. As a NiCd cell is being charged, two things happen which affect its temperature. Due to resistive losses within the cell, some of the charging current is converted to heat (I2R losses). At the same time, the chemical reaction that takes place during NiCd charging absorbs heat (i.e. it`s an endothermic reaction).

High Speed NiCd Charger for R/C
Click here to download the full size of the above Circuit.

Once a cell is fully charged, the endothermic chemical reaction stops. This means that continued charging current, no matter how low, will cause the cell to heat up. Higher currents will heat the cell up faster. At 10 Amps for example, the cell will heat

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