How to wire BMS that Will P was so excited about!
- Thread starter TEP
- Start date
gnubie
Solar Wizard
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- Sep 20, 2019
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Slight hijacking since I've not posted in this thread before but ... rearranging the cells into a single 12v high amp hour battery by parallelling cells and then hooking those sets in series to form 12v, possible?
SCClockDr
Solar Enthusiast
I assumed we were talking 8 cells. With 16 cells & 1 BMS to result in one 24 volt battery:
- Assemble 8 pairs of cells pos to pos & neg to neg.
- Once you have the 8 pairs.
- Arrange them as I described above alternating each pair vs each cell.
- This is the preferred arrangement with LiFePo4 cells (2p8s) with 1 BMS vs (8s2p) with 2 BMS's
To be completely clear.
If you are setting up a 4S 12ish volt arrangement, you must only have 4 cells or banks of cells monitored.
If your bms is a 48v bms, unless it can disregard the other 12 conductors, it will not work for you.
If you arrange the bank for 16S 48v, you can monitor the bank that way, but you will need a regulated power supply for the 12v draws in the vehicle, and a 48v inverter and charge controller.
If you are setting up a 4S 12ish volt arrangement, you must only have 4 cells or banks of cells monitored.
If your bms is a 48v bms, unless it can disregard the other 12 conductors, it will not work for you.
If you arrange the bank for 16S 48v, you can monitor the bank that way, but you will need a regulated power supply for the 12v draws in the vehicle, and a 48v inverter and charge controller.
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
this thread is too confusing because of the lack of clarity. no longer watching it...
grizzzman
Photon Vampire
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- Sep 21, 2019
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Then put 4 cells in parallel build four that way then put the four blocks in series then you will end up with a 12 volt 200 amp hour battery. Then pick up a 4S BMS for lifepo4 3.2 volt cells. You will need to come up with the connects to do this because the ones you have are to set up a 12 volt 8 cell set up.
Last edited:
Yes TEP, this is your solution if you have 16 cells and want a 12 volt battery. This is by far the simple solution.
So this is my layout for the 12V (200amp) 4S battery. Now to search for the appropriate BMS. Because my Zantrex is a 130 amp charger and a 2400W inverter. What amp rating would you suggest from this ebay listing?
JBD smart BMS 4S 12V 60A 80A 100A 120A Lifepo4 3.2V Lithium Protection Board APP | eBay
Include in BMS, need to buy them. don't include in BMS. in English. CAN version need to custom made.
www.ebay.com
MisterSandals
Participation Medalist
Okay so I Have sketched 4 Packs of 4 cells each. Each RED button is the Positive for the cell and the Pack. The individual cells are all connected positive to positive and negative to negative. (When I cut a pasted from PowerPoint the Buss bars disconnected, oops!)
I did just like Will said and arranged 4 cells ea. in parallel and then connected the four packs in series to get to the 200amp 4S battery.
With that accomplished, What would Folks suggest for the BMS listed on EBAY?: https://www.ebay.com/itm/JBD-smart-...62:m:miP2rb7g-wSJj_qQSQ6izkg&var=493436106469
I did just like Will said and arranged 4 cells ea. in parallel and then connected the four packs in series to get to the 200amp 4S battery.
With that accomplished, What would Folks suggest for the BMS listed on EBAY?: https://www.ebay.com/itm/JBD-smart-...62:m:miP2rb7g-wSJj_qQSQ6izkg&var=493436106469
tonyvincent
New Member
- Joined
- Dec 26, 2019
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- 22
Does BMS recommend it? The best of Bluetooth.
Is this better? I think this was the O.P.'s goal. (double check me, it is still early)
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