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I would expect the car is a much more harsh environment for the battery than my house. I'm not talking about vibration or temperature, though those matter, but
by mhandley 12y ago
I would expect the car is a much more harsh environment for the battery than my house. I'm not talking about vibration or temperature, though those matter, but electrical demand. A model S has a 310kW motor. Nothing in my house comes anywhere close to demanding 310kW. Of course the Tesla will rarely require the full 310kW, but its charge and recharge cycles are at the mercy of your driving.
You could smooth out the peaks in my home demand with probably just 10kW. Perhaps smooth out many of my neighbours peaks with 50kW. But my point is that there are no hard bounds that the battery needs to satisfy, unlike in a car when you have to supply the drive current or sink the brake current. You can tune a home battery's charge/discard cycles for maximum battery life rather than maximum performance. I don't have data for how much difference that would make to battery life, but I would guess it may be significant.
- hayksaakian 12y agoif the battery has capacity of 85 kWh and you're saying the motor consumes 310kW at max, then that would mean a model S only has a range (time) of 16 minutes? Tesla estimates about 300 miles per charge at 60 MPH (300/60 = 5 hours) http://my.teslamotors.com/goelectric#range http://my.teslamotors.com/goelectric#range so if you get 5 hours out of 85 kw, that means you're using about 17 kW per hour
- adrianN 12y agoYou don't go 60MPH when your motor produces its peak power.
- function_seven 12y agoEvery time you accelerate, you're drawing way more current from the battery than you do cruising at highway speed. So the average power draw is 17 kW/hr, but some of that happens in great bursts.
- deleted 12y ago[deleted]
- anxman 12y agoTo clarify, the P85D model has a peak draw of 490-510.