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I'd like a quick sanity check from some of you smart guys:
I have a Tesla standard LDU (not Sport or Performance) for a swap and I'm currently shopping for batteries. I found a Rav4 EV pack, which is manufactured by Tesla and has similar modules to the Model S and Model X packs. It is a 42 KWH pack and I BELIEVE the cells are in a 48p configuration instead of the 74p that you see in the 85 KWH Tesla packs.
I'm confident that I can repackage the Rav4 pack to fit my vehicle, but I'm concerned about the power output of the smaller pack. The Model S85 pack can produce 1520 amps for 3 seconds at a 6.5C discharge rate, I'm using the S85 module specs from HSR Motors for reference:
85-type | Battery Modules | Products | HSR Motors
However, the quick math tells me that the Rav4 pack uses different cells: 85KWH at 364V for the S85 is 3.15Ah per cell, and 42KWH at 386V for the Rav4 is 2.26Ah per cell. Using the same 6.5C discharge rate, that puts the max output of the Rav4 pack at 705 amps.
So my question is this: is it possible that the 2.26Ah cells in the Rav4 can tolerate a higher discharge rate? To get 1000 amps out of them would be a 9.2C discharge rate. To me, 1000 amps is kind of the "magic number" to make sure I'll be getting the power I want from my LDU.
Of course, if I have fudged my math or if I'm off base with my assumptions then please correct me.
I have a Tesla standard LDU (not Sport or Performance) for a swap and I'm currently shopping for batteries. I found a Rav4 EV pack, which is manufactured by Tesla and has similar modules to the Model S and Model X packs. It is a 42 KWH pack and I BELIEVE the cells are in a 48p configuration instead of the 74p that you see in the 85 KWH Tesla packs.
I'm confident that I can repackage the Rav4 pack to fit my vehicle, but I'm concerned about the power output of the smaller pack. The Model S85 pack can produce 1520 amps for 3 seconds at a 6.5C discharge rate, I'm using the S85 module specs from HSR Motors for reference:
85-type | Battery Modules | Products | HSR Motors
However, the quick math tells me that the Rav4 pack uses different cells: 85KWH at 364V for the S85 is 3.15Ah per cell, and 42KWH at 386V for the Rav4 is 2.26Ah per cell. Using the same 6.5C discharge rate, that puts the max output of the Rav4 pack at 705 amps.
So my question is this: is it possible that the 2.26Ah cells in the Rav4 can tolerate a higher discharge rate? To get 1000 amps out of them would be a 9.2C discharge rate. To me, 1000 amps is kind of the "magic number" to make sure I'll be getting the power I want from my LDU.
Of course, if I have fudged my math or if I'm off base with my assumptions then please correct me.