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Custom design and manufacture of state-of-the-art
battery chargers, UPS, and power supplies
12V Charger for 16 batteries at a time
The requirement was for a field charger that could be transported easily, and charge 16
SLA (sealed lead acid ), flooded lead acid or VRLA batteries simultaneously. Each battery
charging circuit is fully independent with its own smart controller, and status LEDs. The power
supply has universal input 85 VAC to 235 VAC 50/60 cycle. We put it in a Pelican™ style
case with an o-ring gasket to make it rugged and waterproof. The microprocessor controlled
charger boards monitor fault conditions as well as monitor each 12V battery separately for
state-of-charge and end-of-charge.
The front panel contains:
- One illuminated A.C. power switch.
- One A.C. power port.
- One A.C. 10 Amp circuit breaker reset button.
- 16 (10) circuit breaker reset buttons, one per channel.
- 48 (30) LED indicators, three per channel.
- Explanatory stencils describing the LED indicators, connector pins,
instructions for use, specifications, and labeling for circuit breakers and the A.C. power port
and switch.
- Batteries can be left on the charger indefinitely for maintenance
and float charge
- If the power to the charger fails the batteries are kept safe
- Using precise voltage measurements and modern charge algorithms the
charger can safely charge batteries above the C/3 rate recommended by battery
manufacturers
Options: This product type could be extended to any number of
batteries, different battery chemistries, and different charge algorithms. It can also be rack
mounted, or repackaged for indoor use. The microcontroller boards can also monitor battery
temperature if required.
| Detailed Specifications |
PST-10CH-N |
PST-16CH-G |
| |
Navy part number 3755AS225 |
Commerical version |
| Max Charge Current |
4.15 Amps, 8 channels
2.8 Amps, 2 channels |
2.8 Amps, 16 channels |
| Input |
85-235 VAC 50/60 Hz |
85-235 VAC 50/60 Hz |
| Number of Batteries |
1 to 10 simultaneously |
1 to 16 simultaneously |
| Nominal Battery Voltage |
12 Volts |
12 Volts |
| Float charge voltage |
13.8V |
13.8V |
| Battery Capacity |
1 to 40+ Amp-Hours |
1 to 40+ Amp-Hours |
| Total Charging Power |
800 Watts |
800 Watts |
| Weight |
22 lbs, 10 kg |
22 lbs, 10 kg |
Charge times for typical batteries
| Battery Size |
Estimated Hours to full
charge |
| |
4.15A charge rate |
2.8A charge rate |
| 3AH |
<1 hour |
1.5 hours |
| 7AH |
2 hours |
3 hours |
| 10AH |
2.6 hours |
4 hours |
| 12AH |
3 hours |
4.5 hours |
| 17AH |
4.5 hours |
6.5 hours |
| 22AH |
5.5 hours |
8 hours |
| 28AH |
7 hours |
10.5 hours |
| 33AH |
8.5 hours |
12.5 hours |
| 40AH |
10 hours |
15 hours |
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