06-17-2019, 04:59 PM | #1 |
Not Yet Wild
Join Date: Mar 2018
Posts: 28
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BMS Wiring for my Leaf Pack
I have a 57V 120AH 14S Leaf battery pack pictured below.
I am adding a chargery BMS to it. The BMS supports up to 24 cells, but I am using 14 cells. I am hoping for guidance on the BMS wiring. Please be gentle, I am doing my best. Starting from Right to Left in Picture. BMS Bank #1: BMS -1 --> Module 1 - Bottom Post (Main Negative Out) BMS +1 --> Module 2 - Center Post BMS +2 --> Module 3 - Top Post BMS +3 --> Module 4 - Center Post BMS +4 --> Module 5 - Bottom Post BMS +5 --> Module 6 - Center Post BMS +6 --> Module 7 - Top Post BMS +7 --> Module 8 - Center Post BMS +8 --> Module 9 - Bottom Post ----- BMS Bank #2: BMS -9 --> Module 9 - Bottom Post BMS +9 --> Module 10 - Center Post BMS +10 --> Module 11 - Top Post BMS +11 --> Module 12 - Center Post BMS +12 --> Module 13 - Bottom Post BMS +13 --> Module 14 - Center Post BMS +14 --> Module 14 - Top Post (Main Positive Out) |
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06-17-2019, 07:22 PM | #2 |
Gone Wild
Join Date: Sep 2014
Location: Orlando, FL
Posts: 1,308
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Re: BMS Wiring for my Leaf Pack
See page 17 of this manual for the 14S connection to a Chargery 24T
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06-17-2019, 07:26 PM | #3 |
Not Yet Wild
Join Date: Mar 2018
Posts: 28
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Re: BMS Wiring for my Leaf Pack
Thank you for the reply Sir. I did review that diagram carefully, but it appears to be a different pack configuration (4s+4s+6s), which is why I choose the other diagram showing it in series.
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06-18-2019, 08:59 PM | #4 |
Gone Wild
Join Date: Sep 2014
Location: Orlando, FL
Posts: 1,308
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Re: BMS Wiring for my Leaf Pack
You have 14 cells and this is the drawing they provide with the BMS 24 for 14 cells. Wiring wound be different if this were a BMS 16, and would be better suited here.
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06-19-2019, 06:20 AM | #5 |
Not Yet Wild
Join Date: Mar 2018
Posts: 28
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Re: BMS Wiring for my Leaf Pack
My apologies Sir, I did misspeak. My BMS is the 16, NOT the 24. I was confused as the manual is for both. My BMS only has the two ports. Is my diagram correct for the 16?
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06-19-2019, 06:29 AM | #6 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: BMS Wiring for my Leaf Pack
It makes no difference if there is a buss-bar or a piece of cable connecting the modules, all of those diagrams posted and referenced are exactly the same.
You always start with the first connector and don't go to the next one until all ports are connected. The reference on the next connector (first tap) goes to the same location as the last tap on the previous connector. Your connection description in the first post is correct. |
06-19-2019, 07:46 AM | #7 |
Gone Wild
Join Date: Sep 2014
Location: Orlando, FL
Posts: 1,308
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Re: BMS Wiring for my Leaf Pack
I am with Sergio completely and that your connection description was correct. My reference was for the 14S connection diagram.
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06-19-2019, 04:43 PM | #8 |
Not Yet Wild
Join Date: Mar 2018
Posts: 28
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Re: BMS Wiring for my Leaf Pack
Thank you both!!!!
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10-09-2019, 09:19 AM | #9 |
Gone Wild
Join Date: Nov 2012
Posts: 379
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Re: BMS Wiring for my Leaf Pack
I know this post is a few months old, but I'm having trouble wiring my BMS. Can you tell me whether this is correct? I based it off his description in the first post. [IMG][/IMG]
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10-09-2019, 09:51 AM | #10 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: BMS Wiring for my Leaf Pack
That looks correct, I assume You are splitting it into 2 separate packs correct?
If so keep that cable that connects the packs as short as practical and make sure both of the BMS wires 8+ and 9- connect to the same terminal as You have it drawn. |
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