Westart 20AH pouch cell

Batteries, Chargers, and Battery Management Systems.
999zip999   100 GW

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Re: Westart 20AH pouch cell

Post by 999zip999 » Feb 05 2017 4:44pm

A123 20ah wtf. I got 974 cycles so far. They are showing age after 4 years now at 90amps some sag. I mean I just fully loaded these batteries uphill downhill high regen every time these batteries I had no respect but I'm testing they said they wanted to be tested. Some horse's want to run. If not run them to they l die. A123"s want to run. So run them
Last edited by 999zip999 on Feb 16 2017 4:10pm, edited 2 times in total.

Animalector   10 kW

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Re: Westart 20AH pouch cell

Post by Animalector » Feb 05 2017 4:54pm

HAha this thread is about 20Ah cells and they haven't got them. Surprising that a manufacturer doesn't have stock of their product.

999zip999   100 GW

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Re: Westart 20AH pouch cell

Post by 999zip999 » Feb 06 2017 11:37pm

Still thinking ? I wanted 1p not 2p or two 20s 10ah as I think they can handle it at 85amps ?

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icherouveim   1 kW

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Re: Westart 20AH pouch cell

Post by icherouveim » Feb 16 2017 8:13am

999zip999 wrote:Still thinking ? I wanted 1p not 2p or two 20s 10ah as I think they can handle it at 85amps ?
Hello,
of course they can handle 85amps, I draw 105amps peak power from my little 10ah Westart battery pack but it's better to
have 2p if want to have less sag voltage and more capacity.
I've uploaded some photos with my little pack from westart at the previous pages of this threat.

999zip999   100 GW

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Re: Westart 20AH pouch cell

Post by 999zip999 » Feb 18 2017 6:15pm

I will go with the10ah cells as 20s. I need to wate for march. It just confused me that they took the 20ah cells down. Some kind of problem ? I could have two 10ah packs 20s.
The newest the greatest and then they went and took it off the website ???

cycleops612   10 kW

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Re: Westart 20AH pouch cell

Post by cycleops612 » Feb 18 2017 8:06pm

999zip999 wrote:I will go with the10ah cells as 20s. I need to wate for march. It just confused me that they took the 20ah cells down. Some kind of problem ? I could have two 10ah packs 20s.
The newest the greatest and then they went and took it off the website ???
10ah is still 740wh @74v 20s of storage, and monster c-rates, which is not bad. More than u need is also heavier than u need. its a question of balance, like life :).

It should take a pretty fast charge. It shouldnt take long to get a ~500wh top up during an outing with a hopefully not too heavy onboard charger) if there are any wall sockets around during the day, and increasingly, there are.

Hillhater   100 GW

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Re: Westart 20AH pouch cell

Post by Hillhater » Feb 19 2017 6:21pm

999zip999 wrote:Still thinking ? I wanted 1p not 2p or two 20s 10ah as I think they can handle it at 85amps ?
Have you ruled out HK Multistars ?
The 16 Ahr 10/20C packs are still best value ($72 for 6s...$12 per cell) and would have no problem with your 80amp needs.
And simple pack build too.
This forum owes its existence to Justin of ebikes.ca

999zip999   100 GW

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Re: Westart 20AH pouch cell

Post by 999zip999 » Feb 19 2017 6:54pm

Yes have ruled out Lipo. Multistar is a deal , seen to many Lipo fires with two hobby Neighbors. I need a very safe battery. I understand the high energy density.
Last edited by 999zip999 on Feb 19 2017 8:01pm, edited 1 time in total.

Hillhater   100 GW

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Re: Westart 20AH pouch cell

Post by Hillhater » Feb 19 2017 7:24pm

But what makes you believe these westart pouches are significantly safer ?
This forum owes its existence to Justin of ebikes.ca

999zip999   100 GW

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Re: Westart 20AH pouch cell

Post by 999zip999 » Feb 19 2017 8:02pm

I been trying to find out. Good point. Little info.

999zip999   100 GW

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Re: Westart 20AH pouch cell

Post by 999zip999 » Feb 19 2017 8:31pm

Yes anything with such energy can always be dangerous. I was hoping for something as safe as A123.

Hillhater   100 GW

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Re: Westart 20AH pouch cell

Post by Hillhater » Feb 19 2017 9:16pm

Westart cells are definitely not A123 chemistry , or even any LiFePO4 type. They are NMC or similar.
Most lipo fires are down to human error , either in simple abuse, over/under charge/discharge, poor pack assembly, wiring shorts, etc etc.
There certainly are some poor quality lipo cells/packs around, but sensible testing, use, and maintenance will see your battery safer than the risk of riding the local bus.
This forum owes its existence to Justin of ebikes.ca

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icherouveim   1 kW

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Re: Westart 20AH pouch cell

Post by icherouveim » Feb 21 2017 1:47am

999zip999 wrote:I will go with the10ah cells as 20s. I need to wate for march. It just confused me that they took the 20ah cells down. Some kind of problem ? I could have two 10ah packs 20s.
The newest the greatest and then they went and took it off the website ???
I spoke with Mrs Kelly 3 days ago and said the reason they've decided not to produce 20ah graphene cells at the moment is because the big EV companies are interesting more about their high density 3C NCM cells because they are cheaper. On the other hand the problem is their 25ah - 35ah cells don't have a big C rate so they are not good enough for us.

I am really happy with my 20ah - 10C westart NCM cells, I have them for 1.5 years now and with lot of abuse after 8.000km they are like new, I draw 115 amps all the time and they are still alive!

All my previous 18650 battery packs were dying in less than a year with the same use.

They don't produce 20ah - 10C cells anymore because everybody wants more capacity :(
The only way is if you have a big ebike frame and you go for 2P so then even the 3C cell will be enough.

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