Testing the battery pack with the JK BMS. My 60V power supply tops out at 5.1A, which is fine for this basic test. I'm not exactly happy with the included buss bars, and gosh, the screws that are supposed to hold everything together are much less substantial than I expected. But, for the first test, it's fine. Everything is working exactly as expected. At these low C charge rates, the cells are all showing very low deviation, though, I do expect that to change when I set the system up for higher charging rates after the battery is put together "correctly."

#solar #grownostr #diy #lifepo4 #jkbms #battery #offgrid

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Discussion

NiCad?

Lifepo4 (Lithium Iron Phosphate)

Oh yeah and they end up with balancing issues like NiCad?

That's what all the skinny red wires are for. This BMS has a built in 2 amp active balancer to help take care of that issue

Good setup!

Thank you. It took a while to research, but, I've got a pretty good handle on these basics.

Hi did you top Balance the cells?

Are these new cells?

Hi. No. They are new cells and all tested exactly the same voltage out of the box. I won't bother to top balance them during testing, but probably will before final assembly.

Looking good. To bad the batteries are so expensive. But then again. the price of electricity keeps rising to breakeven point will get closer.

The price on raw cells is dropping dramatically. The next pack I build will be with 305Ah cells. This will be at about 2x the cost for 3x the capacity, and I expect that ratio to increase as the latest generation cells come into the market and the price of these older cells drops even further.

Also, if you can generate your own electricity, you're ahead of the game, too.