this thread is meant to discuss how ultracapacitors can extend the life of batteries.
the afs trinity testing showed:
AFS Trinity claims a 150,000-mile useful life for its battery/ultracap system. What is this based on? The claimed 150,000 miles useful life is based on ten months of extensive and continuous physical testing by America's leading independent battery testing laboratory, Mobile Power Solutions of Beaverton, Oregon. This laboratory subjected AFS Trinity's dual energy storage system of lithium ion batteries and ultracapacitors to a demanding duty cycle simulating an urban/highway driving cycle with strong and frequent high current demands. Such a driving cycle was meant to subject the batteries to the kind of strong and frequent loads that the energy storage system would be subjected to by an aggressive driveró think New York or Paris cabby or your teenager. The AFS Trinity system delivered more than 3,800 duty cycles before the batteries reached end-of-life. Each cycle represents a full charge and discharge. Assuming that each charge can deliver sufficient power to propel a vehicle for 40 miles, this represents 152,000 miles, which we rounded down to 150,000.
I can compare the costs to how much it even costs to build an EV. Batteries are very expensive and will fall in price but in the meantime EVers still buy them even with the cost being so high. The production EVs are expensive, yet people still buy them. The ROI is WAY out for an EV right now. So the cost is a factor however under an early adopter label, the cost is high and ROI is low until the cost is low and the ROI high.
so, back to the discussion..........
as far as a balancing system there is already an active balancing system sold by maxwell for their caps. the kit costs 95 dollars for 5 circuit boards. 89 if you buy more than 5 kits.
I found an article laying out the diagram of this active balancing system.
I am wondering if I can have them made cheaper than buying them from maxwell distributors.
and.. can this active balancing circuit designed for 2.7 vdc be used for lipo 2.7 vdc cells?