Is there a problem with charging pack batteries in sets?

prState

Pedelecer
Jun 14, 2007
244
0
Las Vegas, Nevada
That is, putting rechargable batteries into seperate chargers and then loading them back into a single pack. Presumably, one designed to not have batteries soldered together.

What I'm getting at, is first matching batteries, always using them together in a homemade pack, but charging them in individual chargers. All the same type of chargers.

If this sounds more trouble than it's worth, it still solves some problems.

For one, it's easy to buy smaller chargers (4 or 8 batteries at a time). Thus, matching pack size never matters. Plus, I can more or less determine the capacity of the packs I make (amp hours) and what number of types I'm satisfied with. Also, I can probably save money buying some batteries in bulk.

And finally, once I've made a reusable pack, that's most of the hard part gone. I can replace springs (for pressure) as needed.

Workable? Un-workable?
 

flecc

Member
Oct 25, 2006
53,396
30,735
In theory it's not a good idea, given the potential for unbalanced final voltages in the packs.

However, the US Batteryspace company's 36 volt are made in three joined sections of 12 volts each, and each often comes with it's own charger, three of them. Clearly they've found it ok for some considerable while now, so it is at least possible if the chargers are consistent and of exactly the same make and model. Pic below of a batteryspace pack and chargers: