We've used this Revolectrix CellPro PowerLab 8 device successfully to charge and discharge individual cells quite automatically.
Originally designed for the radio controlled helicopter hobby, this device is up to 1344 watts and so offers some pretty interesting utility in charging, discharging, and bottom balancing individual cells, even fairly large ones.
Used in conjunction with a 12v battery source, the part we like best is its ability to discharge cells at rates up to 30 amperes recovering the energy INTO the 12volt battery.
You can also use the 12v battery to charge and we routinely do this at 20 amperes.
The 1344 watt capacity allows charging up to 40 amps but the battery jack connections probably do not. This is often used with a different connector to charge up to 8 LITTLE batteries in parallel. We simply don't use it that way and would urge you to limit charging to 20 amps through the supplied banana jacks.
The included USB interface and the downloadable software allow you to change charge/discharge profiles and make modifications to the parameters in this device.
It ALSO allows you to easily graph the charge and discharge curves of a cell and find it's total capacity. And you can set it up to do a complete cycle of charge and discharge to any voltage levels you choose. It displays voltage, current, amp hours, etc on either your PC or on the backlit LED display.
1. The CellPro PowerLab 8 Battery Workstation
2. Large battery clips to connect to 12v battery (or power supply).
3.Fused Banana jack wires to connect to your test cell.
4. Multicell balance cable
5. USB connector adapter to connect the PowerLab 8 to your PC - download the Powerlab Software..
6. Two medium battery clips to connect your test cell.
7. Attractive carry bag to store these items when not in use.
This package includes the things we've found useful in using this device on larger cells.
POWERLAB8 SOFTWARE DOWNLOAD
POWERLAB 8 USER GUIDE
Pack capacity: 20 mAh to 360Ah
Input voltage: 10-32VDC,
reverse polarity protected Input current: 1A to 60A,
software limited Power conversion: Synchronous DC/DC converter, supports multiple switcher frequencies of 31.25 kHz, 62.5 kHz, 125 kHz; user selectable by preset,
85% to 93% efficiency depending on output current
Output battery charge current: Adjustable range 10mA to 40A, limited by 60A input current
Output battery discharge current: Internal discharge 10mA to 10A,
100W max Regenerative discharge 10mA to 40A,
1344W max** Continuous max output power: 612W @ +12VDC input, 1344W @ +26.35VDC
Voltage calibration: Cell voltage measurements are factory calibrated to a standard traceable to NIST; calibration is to +/- 6 mV
Current calibration: Charge current is factory calibrated on a 4A standard; calibration is to +/- 1mA
Measurement accuracy: Voltage resolution: 78uV (16 bit) Voltage tolerance: +/- 6mV Charge current: +/- 1%
Capacity added to pack: +/- 1% Percent capacity (“Fuel”): +/- 5% (with accurate fuel table defined for battery being charged)
Serial data output: 19.2kbps, 8 bits, 1 start bit, 1 stop bit, no parity
Data integrity: Checksum, CRC checking
Cooling fans: Twin, 13 CFM, 50mm diameter
Heat sink: Internal 200W aluminum, thin finned
Output battery connector: “Cellpro” compatible, JST PA series, 9 position
LCD: 2 line, 16 character, light grey/blue backlit
Size: 5.82" x 6.55" x 3.57"