Buggies Gone Wild Golf Cart Forum - View Single Post - Weird battery voltages after lithium conversion

Pat911 · 11-06-2022, 03:57 PM

Hi Naustin,

Sorry, but Dakota Lithium gave you bad advice. Series connected Lithium batteries will always give balancing problems

I just had another read of your initial post, the other three batteries ranged from 12.8v to 13.4v. Those three are also out of balance. Once the batteries are out of balance, the total pack Ah is reduced to the least charged battery. So if the most charged battery is at 100Ah and the least charged battery is only at 50Ah, you whole pack is reduced to 50Ah. If you're using the shunt to be guided as to how far you can go you'll be stuck away from home. Your cart will shut down when your SOC meter reads 50Ah.

How long did it run for before experiencing this problem, weeks, months? Unfortunately there's no easy way to fix it in the field as the battery that has shut down is simply flat. Nothing except charging it will get it going again.

The best fix for you is to get a 12v 4 port lithium charger that will charge all the batteries individually and ensure that each one gets to 100% capacity at each charge. This will eliminate your balancing problems. Noco have such a charger but it's not cheap. I believe its the Genpro 10x4.

Cheers
Pat.

11-06-2022, 03:57 PM	#4
Pat911 Gone Wild Join Date: Dec 2020 Location: Melbourne, Australia Posts: 1,944	Re: Weird battery voltages after lithium conversion Hi Naustin, Sorry, but Dakota Lithium gave you bad advice. Series connected Lithium batteries will always give balancing problems I just had another read of your initial post, the other three batteries ranged from 12.8v to 13.4v. Those three are also out of balance. Once the batteries are out of balance, the total pack Ah is reduced to the least charged battery. So if the most charged battery is at 100Ah and the least charged battery is only at 50Ah, you whole pack is reduced to 50Ah. If you're using the shunt to be guided as to how far you can go you'll be stuck away from home. Your cart will shut down when your SOC meter reads 50Ah. How long did it run for before experiencing this problem, weeks, months? Unfortunately there's no easy way to fix it in the field as the battery that has shut down is simply flat. Nothing except charging it will get it going again. The best fix for you is to get a 12v 4 port lithium charger that will charge all the batteries individually and ensure that each one gets to 100% capacity at each charge. This will eliminate your balancing problems. Noco have such a charger but it's not cheap. I believe its the Genpro 10x4. Cheers Pat.