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Old 01-06-2020, 12:49 PM   #1
fstop
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Join Date: Oct 2019
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Default Leaf Module G2 basics

So I've started putting together my parts list for a Leaf pack...

1) What size / diameter ring terminals do I need for the BMS voltage monitoring points on the leaf packs? These are bolts included with the module as I understand it, that I remove and insert the monitoring ring terminal under - correct?

2) Are the + and - terminals on each module the same size bolt as the above, or if not what size? I'm planning to split the pack into 2 7 module packs, for ease of installation and mounting flexibility. I'll need to use a few cables to connect the 2 packs together and will need to make up those cables. I realize I should be able to use copper bus-bar type connections on adjacent terminals, which I think I can order with the modules.

3) Any wire type recommendations for the BMS voltage monitoring leads / temp sensor leads? 18-20ga stranded OK?

4) Best way to "check" integrity of Leaf modules upon receiving? Want to make sure all modules are w/in spec, and don't get weak or iffy cells.

How should I go about checking each one?

Thanks!
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Old 01-06-2020, 01:54 PM   #2
MyCousinVinnie
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Default Re: Leaf Module G2 basics

screws/bolts on leaf are 6mm and 8mm if my memory is correct. Wiring depends on the BMS you will use. Chargery comes with wires, 20 or 22 I believe it is. Don't think Zeva does and not sure it's size.

if you plan on splitting the packs, I'd suggest an 8 and a 6, as two 7s doesn't really work as well. if possible, don't split the pack, but depends how the layout in an onward. I have an old club car ds.

I'd order my cells with the copper bus bars. I got mine from a guy whose eBay name was azlithium, I think. Very easy to deal with and would build what you want.
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Old 01-06-2020, 10:08 PM   #3
fstop
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Default Re: Leaf Module G2 basics

Quote:
Originally Posted by MyCousinVinnie View Post
screws/bolts on leaf are 6mm and 8mm if my memory is correct. Wiring depends on the BMS you will use. Chargery comes with wires, 20 or 22 I believe it is. Don't think Zeva does and not sure it's size.

if you plan on splitting the packs, I'd suggest an 8 and a 6, as two 7s doesn't really work as well. if possible, don't split the pack, but depends how the layout in an onward. I have an old club car ds.

I'd order my cells with the copper bus bars. I got mine from a guy whose eBay name was azlithium, I think. Very easy to deal with and would build what you want.
AZlithium is actually where I sourced the Chargery BMS unit. I may not need to split the packs, but seems like I could remove them myself that way (I can't lift 130lbs from inside the cart like that - no way). You are right though - not sure the best way to try and interconnect the modules if split...

Did you get a "smart" charger that talks to the BMS?

Thanks
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Old 01-07-2020, 11:27 AM   #4
fstop
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Default Re: Leaf Module G2 basics

Quote:
Originally Posted by MyCousinVinnie View Post
screws/bolts on leaf are 6mm and 8mm if my memory is correct. Wiring depends on the BMS you will use. Chargery comes with wires, 20 or 22 I believe it is. Don't think Zeva does and not sure it's size.

if you plan on splitting the packs, I'd suggest an 8 and a 6, as two 7s doesn't really work as well. if possible, don't split the pack, but depends how the layout in an onward. I have an old club car ds.

I'd order my cells with the copper bus bars. I got mine from a guy whose eBay name was azlithium, I think. Very easy to deal with and would build what you want.
Was looking at the Chargery charger and stumbled on this review... does not look good. Makes me concerned for my BMS unit as well.

I don't know if this is the charger you ended up with?

https://endless-sphere.com/forums/viewtopic.php?t=95330
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Old 01-07-2020, 04:04 PM   #5
MyCousinVinnie
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Default Re: Leaf Module G2 basics

That's not the same charger used for this application. I have the C10325 from Chargery. I haven't used mine extensively yet, but there are others using them without problem.

And so, that also answers your question whether I got a charger that talks to my BMS.
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Old 01-07-2020, 07:55 PM   #6
fstop
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Default Re: Leaf Module G2 basics

Quote:
Originally Posted by MyCousinVinnie View Post
That's not the same charger used for this application. I have the C10325 from Chargery. I haven't used mine extensively yet, but there are others using them without problem.

And so, that also answers your question whether I got a charger that talks to my BMS.
Thanks - I appreciate all the info. My setup I think will be almost identical, so your documenting it here is very helpful.

I'm still not positive what the "connected" charger actually does -vs- a "dumb" one, since the BMS itself is supposedly balancing cells during charge?
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Old 01-13-2020, 03:50 PM   #7
MyCousinVinnie
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Default Re: Leaf Module G2 basics

A charger paired with the system eliminates the need for an overcharge cut-off relay from what I understand. I have one relay - an over-discharge relay. that function is built into the chargery system.
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