steph280
Key Veteran
Location: Irvine, California
| I use a similar adapter for my Logo 20. If you plan to make two packs and use them for other purposes, it is very important to keep the two packs on the same charging cycle. If the two packs are not balanced, the combined pack will have shorter duration, less power, and your charger will miss peaks. This is why I try to charge/discharge both packs together whenever I can.
Freshly off the charger packs develop the most power and duration. If you leave it on trickle charge afterwards, you will notice power decrease.
Charger cells at higher amp will make them dump amps out faster as well, resulting in higher power output. This is a commonly used "trick" in RC car racing circuit. However, this can only apply to certain cells that allows for fast charge/discharge, such as the Sanyo SCR and RC series. The Sanyo HRSC2600, RC3000HV, and Panasonic stock/ultra metal are the first Nimh cells I'm aware of that can be fast charged.
Most of the modern chargers will measure the internal resistance along with voltage, thus determine the suitable amp to pump into the cells. My schulze will pump 8.1 amps into HRSC2600, while only 0.80 amps into the transmitter pack. This will give you a good indication on which cells can be fast charged.
You can also get cells "zapped" which results in even lower internal resistance. These cells will dump higher amp, but will only benefit those applications which requires more than 40 amps.
Another new thing the European is doing is physically compressing the cells in attempt to reduce internal resistance even further. I have not seen one done in the states, so I dont know how well it works. But apparently this technique was used by the current F5D world champion to set the current world speed record.
Sorry for the long post. Battery technology is an interesting topic, and is part of the reason for my interest in electric helis.
Stephen |
Would you say that it's just a trivial matter?
