Charging NiMH Battery while in Use

Question

I have been trying to figure out if I could use my NiMH battery while it is in use for my current project. If it is possible, how would I go about doing this?

I am currently making a handheld retrogaming system using Raspberry Pi, a rear view camera monitor, and a NiMH battery.

michaelkellett · Answer

I just wrote a detailed reply to you and E14 dumped it with a bizarre error message - no time to do it over again so here's a summary.

You can only trickle charge using the connections you describe. If you want to fast charge you will need to design a more complex circuit where the load is driven directly by the externl supply whn it's available and the battery is charged by a separate charging circuit and have some kind of switch to connect the load directly to the battery when there is no external power.

The first link is a quite detailed description of NiMH batteries and the second a general FAQ.

data.energizer.com/PDFs/nickelmetalhydride_appman.pdf

http://www.gpbatteries.com/INT/index.php?option=com_k2&view=item&layout=item&id=236&Itemid=478

MK

Charging NiMH Battery while in Use

raspberry-pi mame portable