I am living in Germany and have a normal Model S 85kWh. We use km/h instead of mph in Germany. Please note, that 1 mile equals 1,609 kilometers.
I waited months for a perfect time to drive my fully topped up battery empty at a very high velocity. There are no speed limits on German Autobahns.
Yesterday (Saturday 5:30am) was the perfect time. My requirements for such a day were:
1. Low traffic density
2. Dry Roads
3. Daylight
4. Temperature < 20°C (68F)
I started topping up the car at 3:30am. 100% was reached at 5:00am and I started at 5:35am. I wanted to race the car as fast as possible in safe conditions. These conditions were:
0. Safety! No illegal speeds or maneuvers. Keep safety distance (for 200km/h - 125mph: 100m - 110yrds)
1. Reach my destination.
2. Long term power consumption <= 80kW
(I wanted to lower the risk for the battery. Long term discharge current should be less than 1C)
3. Driving foresight-fully not braking too often.
(I had to slow down twice from ~160km/h (100mph) to 120km/h (75mph) using the breakes)
4. After reaching 100km (60mls) Typical Range, I reduce max. power to ~60kW
(Cell voltage will have reduced significantly then and the taken amps from the battery would otherwise rise above 1C)
The Results:
Average speed had been ~165km/h (102mph).
Average energy use was 410 to 430 Wh/km (660 to 700 Wh/mi) on the Autobahn.
With street works, few speed limits and change at Autobahn crossings the average energy consumption was 392 Wh/km (631 Wh/mi).
I reached a distance of 181,6km (112,8mi).
Very interesting was the amount of energy I was able to get out of the battery. 0 Typical Range was reached 100m (90yrds) in front of the garage. So the Zero Mile protection as well as the Block Protection were untouched. 71,2 kWh came out of the battery. With these 9 kWh protection the battery just gave 80,2 kWh (instead of 85 kWh).
This is normal, because Peukert's Law says, that higher currents result in more losses. I compared this high speed discharging with a typical discharging of mine at an average of 204 Wh/km (328 Wh/mi). I got more (74,3 kWh) out of the battery during slow discharging. I also calculated the Kapa of the Peukert Function. It resulted in a value between 1.03 and 1.04, which is significantly better than a standard Li-Ion battery (1.05). This shows the high end chemistry of the cells in our cars.
P.S.: Cruising along undisturbed at 200km/h (125mph) I was overtaken by a Nissan GT-R at roughly 300km/h (185mph). There are more maniacs under their ways on German Autobahns very early on weekend mornings :scared:
I waited months for a perfect time to drive my fully topped up battery empty at a very high velocity. There are no speed limits on German Autobahns.
Yesterday (Saturday 5:30am) was the perfect time. My requirements for such a day were:
1. Low traffic density
2. Dry Roads
3. Daylight
4. Temperature < 20°C (68F)
I started topping up the car at 3:30am. 100% was reached at 5:00am and I started at 5:35am. I wanted to race the car as fast as possible in safe conditions. These conditions were:
0. Safety! No illegal speeds or maneuvers. Keep safety distance (for 200km/h - 125mph: 100m - 110yrds)
1. Reach my destination.
2. Long term power consumption <= 80kW
(I wanted to lower the risk for the battery. Long term discharge current should be less than 1C)
3. Driving foresight-fully not braking too often.
(I had to slow down twice from ~160km/h (100mph) to 120km/h (75mph) using the breakes)
4. After reaching 100km (60mls) Typical Range, I reduce max. power to ~60kW
(Cell voltage will have reduced significantly then and the taken amps from the battery would otherwise rise above 1C)
The Results:
Average speed had been ~165km/h (102mph).
Average energy use was 410 to 430 Wh/km (660 to 700 Wh/mi) on the Autobahn.
With street works, few speed limits and change at Autobahn crossings the average energy consumption was 392 Wh/km (631 Wh/mi).
I reached a distance of 181,6km (112,8mi).
Very interesting was the amount of energy I was able to get out of the battery. 0 Typical Range was reached 100m (90yrds) in front of the garage. So the Zero Mile protection as well as the Block Protection were untouched. 71,2 kWh came out of the battery. With these 9 kWh protection the battery just gave 80,2 kWh (instead of 85 kWh).
This is normal, because Peukert's Law says, that higher currents result in more losses. I compared this high speed discharging with a typical discharging of mine at an average of 204 Wh/km (328 Wh/mi). I got more (74,3 kWh) out of the battery during slow discharging. I also calculated the Kapa of the Peukert Function. It resulted in a value between 1.03 and 1.04, which is significantly better than a standard Li-Ion battery (1.05). This shows the high end chemistry of the cells in our cars.
P.S.: Cruising along undisturbed at 200km/h (125mph) I was overtaken by a Nissan GT-R at roughly 300km/h (185mph). There are more maniacs under their ways on German Autobahns very early on weekend mornings :scared:
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