LOL! I love Mike's work since I first saw it in 2006. The last time I checked, he was modifying a Prius transaxle to be a rear-drive, electric motor for his Insight ... replacing the 5th wheel. <grins>
Quote:
Originally Posted by Daox
Ack, how could I forget. Eric also sent me this link not too long ago. Mike Dabrowski (Insight guru, MIMI inventor) has also been tinkering around with these cells. Hes has some excellent testing results on his site including thermal testing. As you can see, they heat up very uniformly, and the tabs do tend to stay cooler than the rest of the cell.
http://99mpg.com/workshops/designingandbuildi |
Awe man! He has great toys!
One thing he brought up that is obvious once you think about it ... compression of the polypaks. But I didn't see a plot of compression force vs. cell capacity.
Well I had another insight this afternoon (Ok, old man finally remembered something) about my eBike load:
There are two potential loads:
- 350W/48V = 7.29A - rated power current
- 15A "Maxmum current"
I've used the maximum current for all of my earlier, draft calculations but at 350W, we'll see half the current load. But as for the A123 cells, they are going to have an easy life.
The other thing to share is I bought my first airplane, a Cherokee 140, and a Yamaha 550 motorcycle to drive to and from the airport. I was always going to be a Visual Flight Rules pilot which meant if it was nice enough to fly, it was nice enough to ride the bike. Although I had a full set of leathers, motorcycles and bicycles don't do well on snow and ice. Realistic temperature range:
- 40F (4C) - assumes gloves and layers under rain suit
- 100F (38C)
If I remember correctly, Mike lives in the NorthEast and has to deal with greater temperature swings than I do. Combined with the relatively light load of the eBike, this should be an awesome combination. <grins>
In bad weather, I'll have to take one of our Prius or stay home.
Bob Wilson