recharging a forklift

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Postby qdos » Tue Dec 15, 2009 8:37 am

ChrisB wrote:
Grumpy-b wrote:With modern electronically controlled chargers, if the battery voltage is too low they will not charge even if the battery is actually OK. The older non controlled ones will generally charge any lead acid battery that will take charge.
Its well worth having a simple non electronic controller for such uses.


Yep I'll go with that, I've got a lovely C-Tek charger, very nice it is too, but its a pain if a battery is really low as it wont touch it and refuses to start :evil: thus a couple of times I've had to kick start it with either another 12v or just charge the battery on an old fashioned charger to get the voltage back up where the c-tek can take over.


I have to agree with this too though a cunning trick is to put in the circuit another battery which has a charge to lift the voltage above that 'no can do' minimum or indeed charge a good battery and then connect that to the discharged one.

Not sure I've explained that very well.

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Postby EVguru » Thu Dec 24, 2009 11:54 am

If the battery voltage is too low, it could be that it is very flat, or it could be that you have a failed/shorted cell (or several). In this case, it would not be a good idea to charge the battery because you could vent the failed cell, or overcharge the good cells.

A really good intelligent charger will apply a low charge current to a battery that is too low and see if the voltage comes up to a sensible level. If it does, it will then charge normally, but if not it will shut down and give an error.

I believe the Brusa chargers do this.

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