Thundersky only show .3C ? Scary how long they will last at 3C,
Someone needs to just simply test them and publish the results,
I'm probably going to build such a tester to truly find out.
For a 40AH, 24 cycles a day is 750 cycles a month, so it would take 3-6 months to truly find out, but I'd bet after 1 month you'd see some results.
I'd rather find out with one cell that a whole pack of them.
The caps don't have to supply all the current, if they can just reduce it by half during acceleration when the batteries are taxed, then it might double the life of the batteries, and for a $10k or $15k pack, that is a lot of cost savings. I'm more interested in building a really fast car using caps.
Originally Posted by T1 Terry
The cycle life for CALB and Thundersky batteries of 3,000 to 5,000 cycle @ 70% DoD is at the nominated 0.3C charge/discharge rate, it says this quite clearly in the specs, how many people don't want to read that bit :lol: I have put the question to each of the battery companies (there is a lot of them producing LiFeP04 batteries now) asking what the cycle life is at the max rated discharge. Either I receive no reply or some obscure specs from a completely different type and capacity battery that doesn't answer the question at all. They try the "no understand question" tactic rather than giving an honest answer.
Ultracaps could extend the cycle life but the number required relates to the max charge or discharge rate the motor will produce. At the max rated 650amps @ 48v in the case of my chosen motor would be a lot of caps, simply financially a non viable proposition. With a small light vehicle where minimal room for batteries is available and weight is everything but $$ are secondary then some gain could be achieved but I can't see it being enough to warrant the cost. A better deal $$ wise would be to sell the tired batteries at a reduced cost to someone looking for electrical energy storage generated via solar or wind or even using them yourself to make a solar home charging pack and using that value to offset the price of a new battery pack. With the cost of electricity continually rising and the cost of lithium batteries continually falling the self storage system makes a lot of sense and would save more $$ than cents