spaceballs
Member
Well PEM can suck out what 300KW from the ESS, so to me that high current DCThe car and electronics are not designed for high current DC.
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I'm no engineer so can someone explain why they can't just bypass the PEM and onboard charger and wire directly to the battery to make Supercharging possible?...
What I suggested is basically this.
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... *The only exception I can think of is if the cell count were lowered, in order to make room for a coolant line to snake through the rows/layers of cells....
This already exists, ESS has active water cooling between cells, wouldn't be too hard to put in better battery pump if it required it.
Also with newer battery tech, with lower cell IR, it will have lower heat generated at higher C rates.
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... It would be a lot more challenging to change the cell count or add DC bypass, ...
DC bypass wouldn't be too hard for Tesla to do, firmware change, and HV wire tap between ESS and PEM.
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They'd need to upgrade most of the supporting systems to do this:
- New Model S charge port
- Rewiring charge port, PEM and battery
- Add DC bypass contactors
- New firmware
- Possibly increased cooling
Plus all the testing needed to bring it to production. It's a lot easier to do a 1:1 swap of the battery cells to create a long-range pack.
Some notes of your list.
- New Model S charge port - Agreed needed.
- Add DC bypass contactors - Not needed already in ESS
- New firmware - Agreed would need updated firmware to enable DC bypass contactors to SC.
- Possibly increased cooling - Unlikely needed with latest Cell IR technology.