Hello.
I have a little challenge in my hands. I discharged my 2P20S LiPo pack to deep for my charger to start charging it. I removed parts of the enclousing tape to disconnect my BMS. I found that all the parallels are between 3,50 and 3,66v To a total of about 72,1 volts. I figured that this is a product of my BMS cutting the load at a lower voltage than my charger will accept to start charging my pack with 84volts.
I had the pack inside over night to get to about 20C temp, hoping this vould increese the volt to a acceptable level for the charger. Sadly it did not. Next sted would be to heat it to 40C temp in the oven. But some how I do not like the sound of putting a big LiPo pack in a owen, not knowing if that 40C on the knob will actually be way above at places nearer to the elements... :?
Sadly I have soldered all the main power-cables together between the packs, so I can not get the main connectors from the balance charger to the + and - directly. All I can tap into without dismantling large amounts is to charge via the 24AWG balance cables. But I find that to be a not so good solution, since that will take days, brining into account that I dont tink anything over 0,6A sould be a good idea, and my balance charger only does "full-charge" mode 4,2v. If I could only bring them up to 3,7, that would work at that low amp i guess (taking time into consideration).
Does anybody have any good ideas of how to soulve this in a timly fashion without doing dangerous manuvers to the pack?
I have a little challenge in my hands. I discharged my 2P20S LiPo pack to deep for my charger to start charging it. I removed parts of the enclousing tape to disconnect my BMS. I found that all the parallels are between 3,50 and 3,66v To a total of about 72,1 volts. I figured that this is a product of my BMS cutting the load at a lower voltage than my charger will accept to start charging my pack with 84volts.
I had the pack inside over night to get to about 20C temp, hoping this vould increese the volt to a acceptable level for the charger. Sadly it did not. Next sted would be to heat it to 40C temp in the oven. But some how I do not like the sound of putting a big LiPo pack in a owen, not knowing if that 40C on the knob will actually be way above at places nearer to the elements... :?
Sadly I have soldered all the main power-cables together between the packs, so I can not get the main connectors from the balance charger to the + and - directly. All I can tap into without dismantling large amounts is to charge via the 24AWG balance cables. But I find that to be a not so good solution, since that will take days, brining into account that I dont tink anything over 0,6A sould be a good idea, and my balance charger only does "full-charge" mode 4,2v. If I could only bring them up to 3,7, that would work at that low amp i guess (taking time into consideration).
Does anybody have any good ideas of how to soulve this in a timly fashion without doing dangerous manuvers to the pack?