kmp647
Well-known member
How Nissan engineers 135 mile epa Leaf
each leaf module is a 4 cell stack 2s2p
think each cell is around 33ah or so
since they need to add capacity and keep voltage the same using the same cells….
they go to either a 2s3p module, or a 2s4p
2s3p give a 50% increase in capacity (36kwh pack) EPA range ? 120 ?
2s4p gives 100% increase in capacity(48kwh) EPA range ? 150 ?
pack voltage remains the same, capacity increases, BMS will need to take on the monitoring and balancing of the additional cells
costs kept low because no new cell size is needed. current modules get thicker and heavier. not really a big deal for Nissan considering all they have done with the Leaf.
its a common technic for increasinp pack capacity
pack shape and case needs modify , longer pack maybe extending into the phantom spare tire area?
This is how Nissan will offer more range , no way they will change the cell size
they will offer 2s3p or more liekly 2s4p cell config in the 48kwh pack
2s3p change could be a mid cycle refresh with new BMS and some suspension upgrade and tires, same body
2s4p might require a model changeover redesign because of weight and size of pack
best we can hope for in 2015 model ? 2s3p 36kwh option ? on my curent leaf 60 mile commute I get home with 2-3 bars and about 14 to 20 miles reserve/ 36kwh leaf 5 or 6 bars 50 to 60 reserve
each leaf module is a 4 cell stack 2s2p
think each cell is around 33ah or so
since they need to add capacity and keep voltage the same using the same cells….
they go to either a 2s3p module, or a 2s4p
2s3p give a 50% increase in capacity (36kwh pack) EPA range ? 120 ?
2s4p gives 100% increase in capacity(48kwh) EPA range ? 150 ?
pack voltage remains the same, capacity increases, BMS will need to take on the monitoring and balancing of the additional cells
costs kept low because no new cell size is needed. current modules get thicker and heavier. not really a big deal for Nissan considering all they have done with the Leaf.
its a common technic for increasinp pack capacity
pack shape and case needs modify , longer pack maybe extending into the phantom spare tire area?
This is how Nissan will offer more range , no way they will change the cell size
they will offer 2s3p or more liekly 2s4p cell config in the 48kwh pack
2s3p change could be a mid cycle refresh with new BMS and some suspension upgrade and tires, same body
2s4p might require a model changeover redesign because of weight and size of pack
best we can hope for in 2015 model ? 2s3p 36kwh option ? on my curent leaf 60 mile commute I get home with 2-3 bars and about 14 to 20 miles reserve/ 36kwh leaf 5 or 6 bars 50 to 60 reserve