Great forum, great thread!
Using HK Multistar High Capacity batteries (4s and 6s) was raised 12 months ago, but for use with a 16.0 (http://www.trialscentral.com/forums/topic/34845-oset-batteries-lithium-lipo-conversion-directions/?p=414419)
I'm planning to convert a 2015 20.0 Eco to lipo (15-20Ah capacity) and had come across these batteries thinking they looked like good options when bundled to 12s - which led me to this thread.
Option 1 - 20,000mAh 6S 10C 6S1P - https://hobbyking.com/en_us/multistar-high-capacity-6s-20000mah-multi-rotor-lipo-pack.html
Option 2 - 16,000mAh 6S 10C 6S2P - https://hobbyking.com/en_us/multistar-high-capacity-6s-16000mah-multi-rotor-lipo-pack.html
Given ghwy's feedback to the post and the wealth of other information embedded throughout this thread, I'm unsure if they're really a great fit for the 20.0 and am looking for a sanity check of my plan.
I've read;
- Oset 20.0 Eco (1200W motor) is capable of pulling a peak current of 100A, possibly 150A - so I'll assume 150A
- Multistar's C rating of 10C/20C is unlikely - 2C/5C seems more real world and will base battery build on that
- Therefore discharge rates are;
- 20,000mAh packs
- Constant - 20,000*2C/1000 = 40A
- Peak - 20,000*5C/1000 = 100A
- 16,000mAh packs
- Constant - 16,000*2C/1000 = 32A
- Peak - 16,000*5C/1000 = 80A
For the 20.0, am I right in thinking with the 6S packs to not exceed 5C (a 150A peak current being drawn) I would need to build two parallel 2x20,000mAh bundles (doubling the discharge rates) to then run in series to get 12s (~48V)? Using a total of 4 packs for a 12S battery with a whopping 40,000mAh, allowing a constant discharge rate of 80A and a very comfortable peak of 200A?
The alternative of using 16,000mAh 6S would reduce the overall size and weight, but with a still massive 32,000mAh 12S battery allowing a constant discharge rate of 64A and a very comfortable peak of 160A. Is 64A for these 20.0 48V Osets getting a little low?
Do I have the correct understanding and math on the battery build and resultant capacity? If so, I think it's back to the drawing board and find a higher C pack.
Open to any and all suggestions or criticisms.
Cheers,
Hosko