nissan leaf 24 volt
- Thread starter rhineha6
- Start date
RikH said:
See this image showing a system with a 6P arrangement & Batrium "leafmons":
https://secondlifestorage.com/image/ytglrr
If you do a search on this site (top right) for "leaf" you'll see how others have used & connectedthem
Exactly how you connect them depends on how many of the 2cell-in-1 block units you have.
Like RikH says, odd cell numbers might not be the best use of your packs, maybe consider a 48V system = 14S (use all the cells)
Bro please help me I have 12 modules 3 in parallel 3 series. I don't have the mind for this part. Can you show me the most cost effective bms with balance and wiring diagram.
24volt system
So each of the leaf cells is actually physically 2 cells in series with a center connection.
You need a 7s = 7 in series for 24V.
So with your 12 cells you would arrange in 4 groups in series with each "group" = 3 cells in parallel
ie 8s, but you would not use the "2nd half" of the last cells. Ie you're using "3.5" in series of your "2-in-one" leaf cell packs
There's lots of examples online for who to connect them & with a BMS.
Have a read here:
offgridsolarbook.com
the pic here:
has 4 cells in parallel but basically the right layout for you.
You can see the paralleling busbars, yours would be three cells long.
Each 1/2 side of the leaf cell = 1x 3.7V "cell", so you start with the most -ve cell = your battery PACK 0V & step to the centre for B1 BMS point, then to the right side +ve = B2. connection to next cell module -ve (also =same B2), center = B3, right side +ve =B4 connection to next cell module, etc, etc, then center of last cell module = B7 also = your battery PACK +ve.
Each step increases by approx 3.7V from the 0 terminal.
Check everything with a multimeter before you join, maybe use thin wire to test connections (thin wire would melt like a fuse vs big sparks from thick cables).
You need a 7s = 7 in series for 24V.
So with your 12 cells you would arrange in 4 groups in series with each "group" = 3 cells in parallel
ie 8s, but you would not use the "2nd half" of the last cells. Ie you're using "3.5" in series of your "2-in-one" leaf cell packs
There's lots of examples online for who to connect them & with a BMS.
Have a read here:
How to Build a Lithium-Ion Battery System for less than $400 per kWh — Off Grid Solar Book
I have seen a lot of people on the internet repurposing old laptop batteries and batteries from electric vehicles. This is a great way to acquire low cost, high quality batteries, but it does require a lot of work to disassemble, test, and sort them. I think this will become a common method in the f
offgridsolarbook.com
has 4 cells in parallel but basically the right layout for you.
You can see the paralleling busbars, yours would be three cells long.
Each 1/2 side of the leaf cell = 1x 3.7V "cell", so you start with the most -ve cell = your battery PACK 0V & step to the centre for B1 BMS point, then to the right side +ve = B2. connection to next cell module -ve (also =same B2), center = B3, right side +ve =B4 connection to next cell module, etc, etc, then center of last cell module = B7 also = your battery PACK +ve.
Each step increases by approx 3.7V from the 0 terminal.
Check everything with a multimeter before you join, maybe use thin wire to test connections (thin wire would melt like a fuse vs big sparks from thick cables).