o00scorpion00o
100 kW
Hi Everyone,
After a few months of using LiPo, I can say for sure that I have well gotten over my fear of it. It's just remarkable the amount of power you can pull from such a tiny pack and I'm only using a tiny bit of it, only pulling 60-70 peak from a 250 amp rated pack!
Going LiPo for the first time was a very daunting task and many thanks to all who helped me here at E.S!
Anyway, I have come to realise that the pack should last 300-500 cycles. Charging to 4.15 and not going much if at all below 3.5V per cell. I rarely use 8ah of the 10ah pack. It's amazing how far I can cycle on just 8 ah with the free wheeling ability of the mac. I can cycle 50 miles on just 5ah, so out of the full pack I could cycle nearly 100 miles!
Even if I were not cycling as much and using the full 10ah and getting 300-400 cycles, on the mac that 10ah full throttle would get me around 12 miles 30-35 mph maybe a little more, so that would be 400 cycles x 12 miles =4800 miles total , that would be about 1 year at about 12 miles a day for 7 days a week. at a cost of 240 Dollars, for 15S Zippy. A 48V 10ah Ping is 350 Dollars, but would last twice as long a little more, making it cheaper over all. (or would it?)
There is one thing though, the ping is a 1C rated battery, so it wouldn't give me the 60-70 ah peak my bike is hungry for, or even run it at 30 mph, the mac consumes about 1200 watts to go 30 mph @ 48 volts that would be 20 amps, and 2C, okay, the ping could do it, but it would probably shorten it's life by half! so the ping costs 700 Dollars to run for the year!
Now the better A123 batteries such as the ones cell-man offers are 10C rated 100% dod 1000 cycles will cost 550 Dollars for 11.5 ah 52 volts, 15S 20C 10ah Zippy LiPo costs 240 Dollars 300-500 cycles.
So in other words cell-man's A123 pack would last 3 years and cost 550 Dollars, making cell-man's A123 52 volt 10 ah pack cheaper for sure, and have the advantage of bms, where the LiPo would cost 720 for the 3 years!
Now I won't be using my lipo that much at all, and not much over winter, so my guess is that it will last me 3 years anyway.
The way I see it though is the C rating of cell-mans A123 is more than enough for most high power use, and works out the cheapest in the long run and is ideal for the every day commuter especially if the extra weight is not an issue, and of course plug in and forget charging!. The ping unfortunately is only good for low 1C use and is not really practical for high power use!
The LiPo is more than good for me simply because of the crap weather I don't get the chance for every day use and in 3 years something much better will be around, so do I really want LiFeP04 that will last 6 years when I can have something much better by the time I need a new battery?
What do you think?
Mark
After a few months of using LiPo, I can say for sure that I have well gotten over my fear of it. It's just remarkable the amount of power you can pull from such a tiny pack and I'm only using a tiny bit of it, only pulling 60-70 peak from a 250 amp rated pack!
Going LiPo for the first time was a very daunting task and many thanks to all who helped me here at E.S!
Anyway, I have come to realise that the pack should last 300-500 cycles. Charging to 4.15 and not going much if at all below 3.5V per cell. I rarely use 8ah of the 10ah pack. It's amazing how far I can cycle on just 8 ah with the free wheeling ability of the mac. I can cycle 50 miles on just 5ah, so out of the full pack I could cycle nearly 100 miles!
Even if I were not cycling as much and using the full 10ah and getting 300-400 cycles, on the mac that 10ah full throttle would get me around 12 miles 30-35 mph maybe a little more, so that would be 400 cycles x 12 miles =4800 miles total , that would be about 1 year at about 12 miles a day for 7 days a week. at a cost of 240 Dollars, for 15S Zippy. A 48V 10ah Ping is 350 Dollars, but would last twice as long a little more, making it cheaper over all. (or would it?)
There is one thing though, the ping is a 1C rated battery, so it wouldn't give me the 60-70 ah peak my bike is hungry for, or even run it at 30 mph, the mac consumes about 1200 watts to go 30 mph @ 48 volts that would be 20 amps, and 2C, okay, the ping could do it, but it would probably shorten it's life by half! so the ping costs 700 Dollars to run for the year!
Now the better A123 batteries such as the ones cell-man offers are 10C rated 100% dod 1000 cycles will cost 550 Dollars for 11.5 ah 52 volts, 15S 20C 10ah Zippy LiPo costs 240 Dollars 300-500 cycles.
So in other words cell-man's A123 pack would last 3 years and cost 550 Dollars, making cell-man's A123 52 volt 10 ah pack cheaper for sure, and have the advantage of bms, where the LiPo would cost 720 for the 3 years!
Now I won't be using my lipo that much at all, and not much over winter, so my guess is that it will last me 3 years anyway.
The way I see it though is the C rating of cell-mans A123 is more than enough for most high power use, and works out the cheapest in the long run and is ideal for the every day commuter especially if the extra weight is not an issue, and of course plug in and forget charging!. The ping unfortunately is only good for low 1C use and is not really practical for high power use!
The LiPo is more than good for me simply because of the crap weather I don't get the chance for every day use and in 3 years something much better will be around, so do I really want LiFeP04 that will last 6 years when I can have something much better by the time I need a new battery?
What do you think?
Mark
