jimbo69ny
1 W
- Joined
- Feb 9, 2018
- Messages
- 52
Hello,
I am adding a range extending battery pack to my 2014 Toyota Rav 4 EV. The vehicle's OEM pack was made by Tesla and uses 18650 cells. It has a 92s48p configuration. The main fuse for the OEM battery pack is 325 amps. 325 amps / 48 = 6.77 amps. That means each cell could potentially see 6.77 amps at the time the main fuse blows. I dont know what nominal amperage of the car during normal driving is.
I am adding an additional pack using 18650 cells. It will be a 92s31p configuration. I am open to suggestions on cells but I was leaning towards the Panasonic ncr18650b cell because I have heard they are reliable and they have one of the highest mah rating I have seen. I will be using cell fuses in my build.
My question is this,
I am trying to figure out if the cells in my additional pack will be able to handle the amp load of the car. I have been told that the Panasonic ncr18650b cells are 2 c with a peak amperage of 6.7 per cell. 6.7 x 31 parallel cells would give me a total of 207.7 amps.
To put it another way. If I took the 325 amp rating from the OEM battery pack's fuse. Would I divide that by 79? (48p from the OEM pack + 31p from my additional pack) If so that would give me a value of 4.11 amps per cell. That sounds much safer than 6.7 amps per cell.
Thanks!
I am adding a range extending battery pack to my 2014 Toyota Rav 4 EV. The vehicle's OEM pack was made by Tesla and uses 18650 cells. It has a 92s48p configuration. The main fuse for the OEM battery pack is 325 amps. 325 amps / 48 = 6.77 amps. That means each cell could potentially see 6.77 amps at the time the main fuse blows. I dont know what nominal amperage of the car during normal driving is.
I am adding an additional pack using 18650 cells. It will be a 92s31p configuration. I am open to suggestions on cells but I was leaning towards the Panasonic ncr18650b cell because I have heard they are reliable and they have one of the highest mah rating I have seen. I will be using cell fuses in my build.
My question is this,
I am trying to figure out if the cells in my additional pack will be able to handle the amp load of the car. I have been told that the Panasonic ncr18650b cells are 2 c with a peak amperage of 6.7 per cell. 6.7 x 31 parallel cells would give me a total of 207.7 amps.
To put it another way. If I took the 325 amp rating from the OEM battery pack's fuse. Would I divide that by 79? (48p from the OEM pack + 31p from my additional pack) If so that would give me a value of 4.11 amps per cell. That sounds much safer than 6.7 amps per cell.
Thanks!