Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Batteries & Chargers => Topic started by: crock on April 12, 2013, 04:46:29 pm

Title: Charging batteries in Series
Post by: crock on April 12, 2013, 04:46:29 pm

Hi,


 I know this has kind of been on before but if I had 2X  7.2V NiMH permanently joined in series ( +ve to -ve ) ie 14.4V for use and for charging would there be any problems ?


 I intend buying a charger capable of charging up to 18V packs.   I know there is a potential problem with charging in series.


As an extra query could I charge SLA in series as well ?   I've only got the one at the mo.


Thanks as usual


Crock from the sunny Highlands  :-)

Title: Re: Charging batteries in Series
Post by: crock on April 12, 2013, 04:49:05 pm

Sorry that should have read 'potential problem with charging in parallell'  , Derrr and whoops.  Sorry.   {:-{

Title: Re: Charging batteries in Series
Post by: Netleyned on April 12, 2013, 04:52:37 pm

No problem in series.
A7.2 pack is 6 cells in series
A 6v SLA is 3 cells in series
Parallel is the problem if the batteries
are not matched and one pack tries to charge
the lower charged pack.

Ned

Title: Re: Charging batteries in Series
Post by: sparkey on April 12, 2013, 04:55:18 pm

 %% No problems with 2x7.2v in series, the charger see's them as one big battery,I have used this method lots of times to get the required
voltage,hope this is of some help,Ray. {:-{ {:-{ {:-{

Title: Re: Charging batteries in Series
Post by: grendel on April 12, 2013, 04:55:26 pm

I charge a pair of 6v sla's on a 12v charger (I wanted 12v and when I got to the shop 2x 6v was cheaper than 1x12v by a large amount. if they are used as a set it shouldnt cause problems, if they are used seperately and discharged different amounts it could be tricky.
Grendel

Title: Re: Charging batteries in Series
Post by: crock on April 12, 2013, 05:31:17 pm

Thanks Chaps, confirms my thinking.  i will now place my order with componentshop.


 :-))