NiCd/NiMH battery chargers

NiCd/NiMH battery chargers

Callisto Electronics Ltd. has designed flexible charger modules for NiMH and NiCd battery packs. These charger modules can be provided for integration into your own products or we can provide finished charger including housing, power cord and other necessary interface elements.

These modules and finished chargers can be adopted to a wide range of requirements (module size, charging current, number of cells per pack, different temperature sensors, special indicators (CHZxxx only), housing size, colour, etc.).

Please find below a summary of the different models currently available. The model number provides a link to the full datasheet.

Specifications of advanced battery charger modules


Number of cells	2-14	2-12	2-12
Fast charging current (Ifast)	0.25C .. 3 C recommended	0.25C .. 3 C recommended	0.25C .. 3 C recommended
Formation charge current	Adjustable
Top off charge current	Adjustable	1/4 Ifast	1/4 Ifast
Trickle charge current	Adjustable	1/256 Ifast	1/256 Ifast
-delta V sensitivity [mV]	-2..3mV/cell	-12mV/cell	-12mV/cell
Charging temperature window [ºC]	0 – 40 recommended any range possible	0 – 40 recommended any range possible	0 – 40 recommended any range possible
Input voltage	DC or AC around 1.5 x VBAT	Any sine wave AC around 1.5 x VBAT	9 - 28VDC
Dimenions of PCBA [mm]	44 x 55	44 x 55	51 x 115
Features	* Voltage gradient monitoring (dV/dt) * Charging disabled at too low or too high temperatures * Battery voltage measurement without charging current * Top-off and trickle charge function * Two LED outputs for charge status indication * Battery formation with lower charging current (pre-charging) * Battery-voltage check to avoid fast charging of deep discharged or overcharged batteries	* Multiple voltage gradient monitoring (dV/dt and d2V/dt2) * Charging disabled at too low or too high temperatures * Battery voltage measurement without charging current * Phase control for charge-current regulation * Top-off and trickle charge function * Two LED outputs for charge status indication * Battery-voltage check to avoid fast charging of deep discharged or overcharged batteries * Pulsed charging current	* Input voltage of charger can be above and below battery voltage * Multiple voltage gradient monitoring (dV/dt and d2V/dt2) * Charging disabled at too low or too high temperatures * Battery voltage measurement without charging current * Top-off and trickle charge function * Two LED outputs for charge status indication * Battery-voltage check to avoid fast charging of deep discharged or overcharged batteries
Options	temperature gradient monitoring (dT/dt), safety timer, different status indicator, discharge before charge		AC input voltage

All charger modules can be adapted to your requirements, please send your requirements via e-mail.