Bjørn Nyland 1000km challenge

[bwilson4web]

In the past month or so, Bjørn Nyland has shown EV reviews with the "1000km challenge" (625 mi). He times how long it takes to travel 1000km (625 mi):

• First leg with 100% SOC
• Charge as needed to reach 1000km (625 mi)

For example, here is a recent video screen shot showing the table at 40:24 in the video:

Here is the table with SAE units:

He has defined a clever, "Block-to-Block" benchmark for a usable distance, 625 miles, in a reasonable time, ~10-12 hours.

In parallel, my efforts have been aimed at a block-to-block time math model to optimize travel time for any given trip. This was inspired by a 14 hour, 711 mi trip to Detroit. It turns out only two vehicle metrics are needed:

1. Energy consumption as a function of speed (see graphs after signature)
2. Charging curve as a function of time

So let's apply the math model to Nyland's 1000km challenge:

1. Fully charge adjacent to 75 mph posted, Interstate - there is an NEMA 14-50 plug at the Rocket and Space Center. After fully charging at home, I'll head over early in the morning and top-off the charge; start the video recorders, and; GPS track loggers. Then I'll hit the Interstate and driving at USA highway speeds, drive toward Nashville and at a turnoff, return to the Athens Supercharger. The target distance, 217 mi, at USA Interstate speeds with 10 mi. reserve.
2. Athens AL to Dickson TN Supercharger - 122 miles with 30 mi reserve, expecting 15-17 minute charge. Drive at USA Interstate speed and arrive with 10 mi reserve. Subtotal: 339 mi.
3. Dickson TN to Athens AL Supercharger - charge to 122 miles with 30 mi reserve, expecting 15-17 minute charge. Arrive with 10 mi reserve. Subtotal: 461 mi.
4. Athens AL to Dickson TN Supercharger - 122 miles with 30 mi reserve, expecting 15-17 minute charge. Arrive with 10 mi reserve. Subtotal: 583 mi.
5. Dickson Supercharger to home - at 42 miles, call it at 626 miles. Then drive home Prius style (i.e., follow 65 mph trucks.)

My initial planning suggests it should take 10:35 (hh:mm). However, some tricks like driving at USA Interstate speeds suggest it may be doable closer to 10 hrs. Also, I could charge at the Athens Supercharger and drive halfway towards Nashville then make a cloverleaf U-turn back to Athens.

 

[bwilson4web]

An excellent compliment to the '1000 km challenge':


His table with SAE units:

Bob Wilson