dimitrib90
100 W
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- Oct 8, 2008
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- 142
Does anyone know what the continous discharge rate of the Thundersky batteries are? I was thinking that they are 2C continous and 4C pulse discharge. Any ideas?
Thundersky
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1 MW
I think you have it right.
dogman dan
1 PW
I bet the test data on thier cycle life was done at 1 c.
AndyH
10 kW
dimitrib90 said:
Here are links to their data sheets, and battery manual.
TS 40Ah Data Sheet http://www.thunder-sky.com/pdf/TS-LFP40.pdf
TS 60Ah Data Sheet http://www.thunder-sky.com/pdf/TS-LFP60.pdf
TS 90Ah Data Sheet http://www.thunder-sky.com/pdf/2008926101826.pdf
TS Battery Manual http://www.thunder-sky.com/pdf/2007030222.pdf
The discharge charts show .3C, .5C, and 1C discharge curves. Standard discharge is listed as .3C - I suspect cycle life is based on that rate.
Andy
dimitrib90
100 W
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1C!! Thats it? :x
Thunderskys are rated for 3C continuous, and will do this no problem, won't even get warm. I believe they are rated up to 10C peak, but I don't how long they specify peak is. I have pulled over 500 amps from a 90 Ah, and this was no problem. This is in a motorcycle application, and the bike comes up to speed very quickly, so no way to know how long it would sustain that 500 amps. My best guess is that peak is 30 seconds or less, but that's just a guess.
dogman dan
1 PW
It's gonna be interesting in a few years, when we find out what cycle life is in real world use. Till then, building packs to run at 1-2 c is wise in my opinion.
dogman dan
1 PW
Ok mr faithfull, you hammer your battery, and I'll learn when you post about it. Till then, call me mr prove it to me.
Dogman,
Why so negative about the TS cells? Do you have some reason to think cycle tests were done at 1C ? Do you have a substantive reason to believe that 1C cycling tests are significantly different than 3C ? Do you have direct experience?
I have seen installs on motorcycles that have run for more than 18 months with no problems. Testing by Rich Rudman of Manzantita Micro (20-30 kW inverter/chargers for electric cars) was done at 3C, and his test rig failed at a few months - before the TS cell.
I stipulate that these tests aren't conclusive proof. And yes, one can always run cells at way below limit in an attempt to preserve them. But why are you so skeptical?
Thanks,
Patrick
Why so negative about the TS cells? Do you have some reason to think cycle tests were done at 1C ? Do you have a substantive reason to believe that 1C cycling tests are significantly different than 3C ? Do you have direct experience?
I have seen installs on motorcycles that have run for more than 18 months with no problems. Testing by Rich Rudman of Manzantita Micro (20-30 kW inverter/chargers for electric cars) was done at 3C, and his test rig failed at a few months - before the TS cell.
I stipulate that these tests aren't conclusive proof. And yes, one can always run cells at way below limit in an attempt to preserve them. But why are you so skeptical?
Thanks,
Patrick
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