Recent content by pretzel

Since you have two, first compare both temperatures, then extend one, and compare again to make sure they are still in sync. then do the 2nd one. That's my plan, anyway.

Exactly this. Relocate the shunt so it's reachable by both identically sized negative leads and attach both to the battery minus terminal. Then a jumper from shunt system minus to the negative busbar, just as you have it.

Thanks for this contribution, but it's hard to follow. Could you please edit your post to be more clear on what this refers to: and which 'balance voltage' is this? I think you mean 'Balance turn on voltage'? I think I like this, and would say that using 3.55 or 3.60v as the highest value...

Thanks for checking my work and watching out for well being :) No charging or balancing woes here. Yep, my power supply is an Iota DLS-30. With the plug in it tops out at 14.2v, so that's still just 3.55v/cell, which I'm calling 100% I initially top balanced it 6 months ago with a bench...

Hey - I think I figured out a way to automate this top balancing process using only the built in balancing. First, make sure you are set to only balance when not charging. Then, under Parameter View, top two values: - set the overvoltage to 3.55v - set the overvoltage release to 3.45v The BMS...

Seems like you are on track for success. The balancing on a JBD is super slow, so it will take days and weeks of eeking it along like that. Frustrating, too, when hitting the 3.65 cutoff voltage. I had the same issue, but have access to the cells, so just attached a capacitive active balancer...

PSA: *never* use silicone around electrical connections - if MIL-SPEC is to be believed. It is a very effective insulator and will mess up connections like switches, etc. Again, according to MIL-SPEC.

you're right - 1/4" should fit m6 ok. I was thinking of another issue, oops

good find but those are 1/4" - and it's hard to find bigger, in general. so would need to snip the rings or drill and tap the busbars - which I did anyway ? edit: you're right - 1/4" should fit m6 ok. I was thinking of another issue, oops

My experience with them in spring 2022 was mixed. The website was very glitchy. Email response was lacking. But eventually, everything was sorted out. Prices were good. Gear was picked up from will call, so no delivery experience here. A refund for cancelled items eventually processed. My...

Are you running both 200A BMS's actively in parallel at the [P-] outputs? Or how are you splitting the load? -thx

Great info, thanks. A ring terminal with the proper wire caliber to fit the sensor would probably work very well for that. Maybe a little thermal paste + gentle compression to keep it in place.

Thanks, I appreciate that! Super helpful to read through and make sense of it all. Great info. I did update after manually equalizing the higher cells a couple of times: And now I'm seeing Vdiff at 0.014v for the pack at 13.8v, so good enough for now, I'll say. [update after a couple of...

Awesome, thanks. It's weird #4 is consistently low, but it crept up to within 0.03v after twice running through draining #1-3 and charging everything up. Now up to 14.4v, and the Vdiff range is only 0.03v, so good enough? I think I'm ready to do a pack load test and see how it performs!

Thanks. I'm still a bit stuck on why this one cell isn't balancing and I suspect the JBS BMS isn't send balancing current properly. I drained the 3 higher cells with a lightbulb, and #4 cell briefly lit up with the "B" balance icon, but since then, nothing. The other 3 cells are constantly...