Will higher amp controller help?

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SYOTR   1 mW

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Re: Will higher amp controller help?

Post by SYOTR » Mar 18 2020 2:35pm

amberwolf wrote:
Mar 18 2020 12:10am

so for your 14s 3p pack, that would be 40mohm per cell / 3p = 13mohm per group, 13mohm * 14s = 187mohm.
For what it is worth, I looked at the specs on the LiitoKala site : https://www.aliexpress.com/item/3280390 ... hweb201603_
They show the internal resistance: ≤20mΩ.

goatman   100 kW

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Re: Will higher amp controller help?

Post by goatman » Mar 18 2020 2:41pm

SYOTR wrote:
Mar 18 2020 2:35pm
amberwolf wrote:
Mar 18 2020 12:10am

so for your 14s 3p pack, that would be 40mohm per cell / 3p = 13mohm per group, 13mohm * 14s = 187mohm.
For what it is worth, I looked at the specs on the LiitoKala site : https://www.aliexpress.com/item/3280390 ... hweb201603_
They show the internal resistance: ≤20mΩ.
I saw that too but it said impedence and im a bit of a dummy, I don't know if impedence and resistance is the same so I never mentioned it but the fact that fast charging it kills its life cycle to 250 suggested to me its a high resistance cell not a low resistance cell but like I said I don't know.

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amberwolf   100 GW

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Re: Will higher amp controller help?

Post by amberwolf » Mar 18 2020 11:22pm

even if it's 20mohm per cell, that's potentially ten times higher (ten times the wasted power) than the rc lipo type cells (depends on teh specific cells).

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zeccato   100 W

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Re: Will higher amp controller help?

Post by zeccato » Mar 19 2020 1:40am

In my opinion: you should double or triple the parallel, then either fatten the shunt, or better yet buy a programmable controller (24-72v. 40ah).
Full susp. folding 20 swxh r. (2011),. 02 2020 MacT8. batt. 48v. 25A Life (2012), and 48 7,5A a123 (2018?). Controller programmable EB3 12 FET. Charger Balancer 14s: TP1430C. Gophert CPS-6011 60V 11A. Mercury (rarely). Buzzer. https://www.google.com/url?sa=t&source= ... 6dXxc9-lNW

SYOTR   1 mW

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Re: Will higher amp controller help?

Post by SYOTR » Mar 20 2020 4:12pm

At this time, I will just use the battery I have built as it meets my needs. It is much better than the RC Lipos it replaced for many reasons. While the gains in speed and torque were not as much as I had expected, they are still better than with the Lipos. I have not yet tested the range as I have not run it down fully but it certainly should do better than the Lipos which got about 22 miles.
I use this bike primarily for shuttle for my whitewater kayaking trips when paddling solo. The longest distance would be 15 miles with some hills, but more often 5 or 6 miles. Because of the road conditions, I would seldom be doing even 20 mph.
My bike has limited space for batteries but I did do another layout with 18650 cells and I could fit a 14s 7p pack.
Perhaps in the future, I will build a larger pack for a higher wattage motor and speed controller, maybe on a small motorcycle frame.
Battery14s7p 18650.jpg
Battery14s7p 18650.jpg (161.29 KiB) Viewed 235 times
ebike1080.jpg
ebike1080.jpg (382.86 KiB) Viewed 235 times
Last edited by SYOTR on Mar 20 2020 7:12pm, edited 1 time in total.

goatman   100 kW

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Re: Will higher amp controller help?

Post by goatman » Mar 20 2020 5:05pm

nice clean build, I always thought orange cats were males but on the rare occasion theyre female.

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zeccato   100 W

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Re: Will higher amp controller help?

Post by zeccato » Mar 21 2020 1:57am

Fine, I've found that lfp resist abuse well,
More tests video etc.:
https://electrotransport.ru/ussr/index. ... 0350.0;all
Full susp. folding 20 swxh r. (2011),. 02 2020 MacT8. batt. 48v. 25A Life (2012), and 48 7,5A a123 (2018?). Controller programmable EB3 12 FET. Charger Balancer 14s: TP1430C. Gophert CPS-6011 60V 11A. Mercury (rarely). Buzzer. https://www.google.com/url?sa=t&source= ... 6dXxc9-lNW

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