ecitypower

[stiffi]

Hello,

Has anybody ever know ecitypower to produce batteries?

http://cgi.ebay.com/48V10Ah-LiFePO4-Battery-Pack-With-Alloy-Case-Charger_W0QQitemZ120484509890QQcmdZViewItemQQptZCycling_Parts_Accessories?hash=item1c0d6fb8c2

Seems like a great deal, and I've bought other components from them in the past, and they've always been top notch.

 

[morph999]

It might not be too bad if you have a 20 amp controller. When you look at these packs, the main thing to focus on is "Continuous discharge amps".

This one says

4. Continuous discharge current: 15 Amps.

That's not very good. My controller is 35 amps so this pack would not be able to work for me. It would cut out all the time. It might work with a 20 amp controller, though. Most of the good packs will say at least 30 amp continuous discharge. This is one of the lowest amps discharge that I've seen. I guess some people have ordered off of ebay and been happy. I think it's about 50/50. Maybe you could make a thread about ebay lifepo4 and see what people's thoughts are on them. There's probably some stuff about it already discussed on here if you use the search function.

Not a lot of places to find cheap lifepo4. I went with the thundersky cells. 36v20 for $384. ...$409 with shipping. I got it from http://elitepowersolutions.com

 

[stiffi]

I wasn't so much asking about eBay batteries, though I was looking.

It was the company ecitypower that caught my eye. I bought a charger from them and I know others have bought compnents from them. I did not know they made battery packs

I have had good experiences with them so far

 

[jorhyne1]

EVComponents has much better prices on Thundersky batteries compared to Elite Power Solutions. I'm not associated with them but they have a good reputation and offer a good prices.

 

[magudaman]

I just ordered 36x Headway 38120S lifepo4 10ah, 16s 100a continuous 200a peak BMS, and a 48v 10a charger, along with cell holders and battery tabs. With shipping it totaled just under a grand

I believe a couple other people have ordered there chargers and BMS systems. The batteries should be here next week, I'll post an update. I contacted them directly through there email contact. I am dealing with Jack Du, speaks ok English and has done great.

 

[morph999]

It would take one or two months to get my lifepo4 from evcomponents and then they tack on a 10 % charge. My lifepo4 will be here in 2 or 3 days and I only paid $23 for shipping.

10 % charge on $360 is $36. Not to mention, if you read the Warranty Policy of Evcomponents, you'll see that there is no warranty at all on the batteries. At least Elite Power says they'll replace a dead cell that was shipped.

 

[stiffi]

It would take one or two months to get my lifepo4 from evcomponents and then they tack on a 10 % charge. My lifepo4 will be here in 2 or 3 days and I only paid $23 for shipping.

10 % charge on $360 is $36. Not to mention, if you read the Warranty Policy of Evcomponents, you'll see that there is no warranty at all on the batteries. At least Elite Power says they'll replace a dead cell that was shipped.

Excuse me for possibly being an idiot, but their website confuses me. Take this link for example http://elitepowersolutions.com/products/product_info.php?cPath=16&products_id=74

Are they showing the stats for 1 cell?, or for a pack of cells? It says the voltage is 12.8 volts, but the title says (4 Cell Pack). So, does that mean this is "pack" with a 48v rating?

I'm just confused because the picture looks like one cell.

 

[magudaman]

That is a pack. It contains 4 cells inside. 4x lifepo4 cell in series are nominally 13.2v

 

[stiffi]

Okay,

So what am I missing? A 4 cell , 48v pack at 20AH for $128?

I see that includes no BMS, or charger, and excludes shipping, but isn't that a crazy deal?

 

[magudaman]

You have to purchase 4 packs to make a 48v pack so $520. They give volume discout if you order 20 or more. Still not a bad price for the amp hours. They are only good for 40 amps cont.

 

[stiffi]

It might not be too bad if you have a 20 amp controller. When you look at these packs, the main thing to focus on is "Continuous discharge amps".

This one says

4. Continuous discharge current: 15 Amps.

That's not very good. My controller is 35 amps so this pack would not be able to work for me. It would cut out all the time. It might work with a 20 amp controller, though. Most of the good packs will say at least 30 amp continuous discharge. This is one of the lowest amps discharge that I've seen. I guess some people have ordered off of ebay and been happy. I think it's about 50/50. Maybe you could make a thread about ebay lifepo4 and see what people's thoughts are on them. There's probably some stuff about it already discussed on here if you use the search function.

Not a lot of places to find cheap lifepo4. I went with the thundersky cells. 36v20 for $384. ...$409 with shipping. I got it from http://elitepowersolutions.com

I asked ecitypower for clarification and they told me the continuous discharge is 15 AMP while the Peak discharge is 20 A

I noticed for Pings 10 AH pack he lists.
Rated Discharging Amperage: 10 Amps
Max Continuous Discharging Amperage: 20 Amps

Are those numbers compareable for this ecity pack? Or is the 15 AMP continuous they list the same as Pings Max discharge definition?

 

[itron]

Hello,

Has anybody ever know ecitypower to produce batteries?

http://cgi.ebay.com/48V10Ah-LiFePO4-Bat ... 1c0d6fb8c2

Seems like a great deal, and I've bought other components from them in the past, and they've always been top notch.

same battery 10$ cheaper here:http://www.bmsbattery.com/index.php?cPath=1

 

[stiffi]

Actually, on that page they list the Continuous Discharge at 20 Amps. That's a page for the same company, however.

I wonder where the discrepency is?

 

[dogman dan]

Reading this thread, I got a bit lost. Mabye you are talking about a different battery now.

But the link that worked to the elite power solutions 4 cell battery showed a spec of 2c discharge rate. So that's pretty much the same as pings. It's 20 amp hours, so it should be capable of 40 amps continuous. But like a pingbattery, it should also last longer if you treat it as a 1 c battery and try to use it between 20 and 30 amps continuous, and stay away from 40 amps continuous.

The main problem I see with the 12v brick of 4 cells is there is no good way to put a cell level bms on it without dissasembling the thing. All you can monitor is a 4s string of cells, not each cell. And you'd need a bms set for monitoring that voltage instead of 3.5 v individual cells. About all you can do is monitor your discharge and hope the thing is 100% charged when you start. Seems like saving a few bucks by taking the low oil level light out of a car. Its cheaper, but it could cost more later.

Some will surely be able to make these work, but it's not for me. I much prefer the hop on and ride without thinking about it of a battery with a bms.

 

[stiffi]

same battery 10$ cheaper here:http://www.bmsbattery.com/index.php?cPath=1

I was talking about the battery in the link above. I think it's characteristics look very similar to the ping battery. Trouble is the company ecitypower lists two different discharge rates in different pages of their site