New battery build

[TimE]

Just built my second 280Ah 24v battery for my boat. Envision grade B cells with a JK bms. I installed the cells in 1" cutting board material and cuts some handles as this is a heavy battery. There is a piece of 3mm acrylic that makes a lid to protect the cells from anything that might be dropped on it.
I charged up with a 15A 24v charger then swapped over to a bench top supply for the last bit. I let the JK do the balancing with its 2A active balancer. All good and ready to join the other battery in parallel.

 

[agtcovert]

Nice, dig that enclosure.

 

[Rednecktek]

What are the screws in the center, more sheathed all-thread? Did that mess with the rear bus bar?

Too bad about the JK BMS.

 

[TimE]

What are the screws in the center, more sheathed all-thread? Did that mess with the rear bus bar?

Too bad about the JK BMS.

There are 6 sheathed threaded rods holding the compression plates together.
I have been running the same JK bms for the last couple of years without problem. I moved this bms off my 105Ah 24v battery so I didn't need to buy a bms. If a better bms comes along with 2A active balancing I will swap them out but as yet, I haven't seen a better bms. These bms have 200A rating and work fine

 

[Rednecktek]

I'm just giving you a hard time.

I only use JBD and Daly's because 100% of my JK's have died on me within weeks of going in. They do make good range targets though.

 

[TimE]

I'm just giving you a hard time.

I only use JBD and Daly's because 100% of my JK's have died on me within weeks of going in. They do make good range targets though.

A friend had Daly BMS in his battery. Similar failure as you describe. Failures do happen, but so far the two JK bms I am running are working fine. I have a spare one just in case. They are cheap enough to do that and can be swapped in 5 mins.