LVC on NIMH

[DRIFT_BUGGY]

Do you use LVC on NIMH battery packs?

[wallot]

why? truck will just stop/move slowly if batteries dont give enough power without any danger to them

[BrianG]

There are really two reasons why an LVC won't work well on NiMH:

1) All current LVC circuits assume lithium cell voltages, which is 4.2v/cell peaked, 3.7v/cell nom, and ~3v/cell cutoff. Since NiMHs are 1.2v/cell nom, you'd have to always use a multiple of 3 cells (3 NiMH cells roughly equals 1 Li cell).

2) NiMH drop voltage more under load. During heavy starts, the voltage may drop below LVC threshold quite a bit. Of course, the amount of v drop depends on the setup; 10th scale 2WD is a lot easier on batteries than 8th scale truggy/MT.

[bl-is-future]

^^^^what he said,

[DRIFT_BUGGY]

Originally Posted by BrianG

There are really two reasons why an LVC won't work well on NiMH:

1) All current LVC circuits assume lithium cell voltages, which is 4.2v/cell peaked, 3.7v/cell nom, and ~3v/cell cutoff. Since NiMHs are 1.2v/cell nom, you'd have to always use a multiple of 3 cells (3 NiMH cells roughly equals 1 Li cell).

2) NiMH drop voltage more under load. During heavy starts, the voltage may drop below LVC threshold quite a bit. Of course, the amount of v drop depends on the setup; 10th scale 2WD is a lot easier on batteries than 8th scale truggy/MT.

Thanks for clearing that up. I was reading a instruction manual or maybe off the net they were talking about running LVC on NiMh/NiCd packs and have never really heard of people doing this. Thought that could of been the reason why my batteries die. I go to charge them and they come up saying 'Voltage To High'. What causes that?