Recent content by bluetrepidation

Hello I'm running a JK BMS with an AC conversion kit on a golf cart. If I manually disable charging in the J Kong app and go from accelerating to regen braking the BMS passes charge current to the batters for a few seconds before dropping to zero. Is this the the body diode in the mosfets...

What kind of batteries are those?!?!?

OK good news. I moved this pack to a test bench and dedicated some time to troubleshooting it. Two problems. First, the balance current on my old BMS was not enough to keep up with these large amp hour cells. I installed a JK BMS with a 2 amp active balancer and after manually balancing again I...

Yes charged to 3.65 with all cells paralleled. Then I let them stand for 3 days while I got caught up in yard work. A.J.

Typo.

Hello everyone. I took the pack apart and connected all my cells in parallel to balance them. After this I ran a load test and I'm seeing the same results. I do like the idea of moving the problem cells and seeing if the voltage sag follows. Let me run that test and I'll post pack soon. Thanks...

Hello, I have a 2p8s pack of 100Ah Fortune cells from Electric Car Parts Company. I've fully cycled the cells maybe 40 times. Recently I've noticed that I can't run my loads as long as in the past. When charging I noticed my BMS seems to be cutting off the pack early. So I decided to...

Hi all. I ended up purchasing the MK3/VE.Bus cable and installing "Venus OS" on a Raspberry Pi to control my inverter. I didn't really need a screen so saved a few $ going this route.

Hello all. I installed these in a golf cart and sold it off to a family member but I'll post back once I get over there and check up on the batteries.

Hello, I'm considering purchasing a original Multiplus. What cable do I need to configure the device? If I install a Control GX can I access all the settings via it instead of purchasing the USB cable? Thanks, A.J.

My neighbor is 103 years old, swims daily, and drives still.

Yes keeping the pack at 4.2 v per cell will shorten the life. But don't worry. Maybe only charge to 4 volts per cell instead. You actually won't loose to much capacity since the discharge curved is very "flat" except at the ends. Maybe run a capacity test and see. A.J.

I tend to keep my packs at half charge and top off when I plan on using them. It's more about the time the pack sits at full charge as well as the max charge voltage. There is a little adjustable trim pot for the charger voltage you could reduce if you wanted. A.J.

Yes the pack tops out at 50.4 volts or 4.2 volts per cell. You are correct 3.7v would be the correct nominal voltage. I guess the LiFePO4 shouldn't be taken literally. A.J.

FYI I just posted about this pack also.... Mine are packed tight with foam but the screws around the top are slotted. You could loosen those and press down on the top and resecure. This clamps the battery down in the foam...