The battery builders club

Overkill Solar has a new llt app. I downloaded it, looks nice but didnt get a chance to mess around with it yet https://overkillsolar.com/support-downloads/

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Stop it, I’m having flashbacks :sob:
Was thinking its possibly shit usb cords.

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I used a known good one, just because if you pulled it out after a failed attempt it’s a brick. :smiley: I really did not look forward to the experience, even though I read the wiki and was warned about that part. Only reason I did it was because I wanted to have wake-from-CAN support.

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No straight white male stuff ever its racist … LOL

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Does the LTT BMS have to be always on? or is there. a way to power it off?

i’m very slightly concerned about power consumption. (yes i hear you saying… ā€œit’s no big dealā€ )
but i’m mostly just annoyed the bluetooth shows up in scans all the time.

No way to turn off the BLE as far as I know, but also it doesn’t matter, the draw is so low

:stuck_out_tongue_winking_eye:

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Unless you have a 1p battery with microcells I can’t imagine it being a problem

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I vaguely recalling there’s a port for a power switch that can be hooked up to it. Does that turn off the BT I have no idea :man_shrugging:, but likely you can reach out to them and ask. They’re fairly responsive.

It doesn’t turn off the bluetooth.

You could put a switch on the 5v line of the bluetooth module tho.

Yeah definitely next best thing

been monitoring my lacroix thats been out of service for 5 months with the cells at 3.8 . Hasn’t moved at all for me to notice. I think if your phone was fully connected to the bms (aka blue light lit up) then maybe over time there would be some drain on a small pack

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BLE energy consumption depends on a lot of parameters, but when not connected is usually consumes around 100 to 500µA, with peaks at around 1mA and lows at around 1µA.

This really depends on how the device is configured though, and since LLT is closed source, we have no clue. It’s verrry low though.

Source

Im really struggling to source some affordable wide nickel strips for my build (im from the UK). Does anyone have any suggestions? Im happy to buy in from China provided it’s a reputable seller.

I just get them straight from aliexpress, so far all good and no steel. :smiley:

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What stores have you used successfully?

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Shenzhen Glacier tools Store

I’ve purchased from these guys twice and both times passed the brine and spark tests.

I think that steel city has been reco’d in past too if memory serves. Don’t have a link for that store tho…

Edit- one thing I will say is that the above store did send me 0.2mm nickel when I ordered 0.15. I have a Kweld so that wasn’t an issue but caveat emptor.

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They shut down or smthn

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Ye.

I’ve looked everywhere, and for the life of me cannot find the maximum and recommended values for charging current for the LTT Smart BMS. Can anyone advise?

Also, I’d like someone to clarify/validate my understanding of basic electronics…

I’m building a 12S4P Samsung 40T pack. Each cell is rated at 35A continuous discharge, and 2A - 6A charging current. With 4 in parallel, does that mean my overall pack (I know the BMS limits charge current, but for arguments sake…) has a max continuous discharge current 140A and max charge current 24A?

Also, another noddy question. If I have two Flipsky 6354s attached to my VESC, each pulling around 50A does that mean 100A coming from the battery?

Should pay more attention in my electrical engineering modules…cheers :slight_smile: