$2948 for (32) (280aH)(New) LiFePO4

Thermodynamical

:̸̢̤̩̹͙̞̲̫̓̽
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May 26, 2020
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I received 48 of these cells and they seem to be good. I am top balancing now, but they all seem to be well matched. They are new, but no QR codes. Well packaged and good hardware.
Epic. Can you make a battery bank build thread sometime in the future if it works out? Are you building 3 48VDC packs basically?
 

MattR

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Nov 26, 2020
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I bought 32 of these and they are testing about 310 Ah so far. Very nice. They are indeed new cells with no QR code.

The only problem is that despite using a torque wrench set to 3.5 nM, 5 of the laser-welded studs popped off. I'm working with a local company to get them rewelded now and so far the Alibaba vendor support has been very good. We'll see what happens when it comes time to pay for the work.

The vendor told me they have changed their QA procedures to better test the studs for future orders.
 

Fussel

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Jan 26, 2021
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I received 48 of these cells and they seem to be good. I am top balancing now, but they all seem to be well matched. They are new, but no QR codes. Well packaged and good hardware.
where bought?

i want to buy some lifepo4 cells, shipped to germany.
any suggestions?
 

100kwh-hunter

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Very nice link, thank you.
But even with my zoom on 25% it is home cinema projection.

Found the seller, but does it work with import tax and vat and shipping?
 
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Pyrofx

Flux capacitor builder
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Jul 27, 2020
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Oatman Az
16 cells here friday. Testing to start soon. Pretty painless transaction. 64 days order to door. Even was sent ship tracking info.
Let's hope they test out well.
 

Haga7584

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Feb 26, 2021
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Waiting for mine and still need to get everything for testing. Will have to start shopping soon.
 

Pyrofx

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Just realised they shipped the 5 boxes without any hazmat markings on the boxes.
These guys are going to create a problem one of these days.
 

JimmyL

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Jun 14, 2021
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Has the price of 280ah cells gone up recently? Getting quotes from USD$102 (Shenzen Qishou to usd$125 (amy wan) plus delivery.

Can you actually buy brand new cells direct from the manufacturere and not go through midllemen?
 

100kwh-hunter

Solar Enthusiast
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Messages
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Has the price of 280ah cells gone up recently? Getting quotes from USD$102 (Shenzen Qishou to usd$125 (amy wan) plus delivery.

Can you actually buy brand new cells direct from the manufacturere and not go through midllemen?
I dont think they are new, but second handed, i am almost sure....
New ones are as 2 as much more expensive.
they came mostly from ev's and roberments energies storage projects.
For our goal they will last a 20-30 years, easy.
New ones will last a minimum of 8000 cycles for our DOD(20 to 80-90ish), meaning how the most of us tread those batts......so no abuse
 

upnorthandpersonal

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I dont think they are new, but second handed, i am almost sure....
New ones are as 2 as much more expensive.
they came mostly from ev's and roberments energies storage projects.
For our goal they will last a 20-30 years, easy.
New ones will last a minimum of 8000 cycles for our DOD(20 to 80-90ish), meaning how the most of us tread those batts......so no abuse

No, they are (for most vendors, at least the ones that are somewhat reputable and where members of this forum worked with) new old stock or cells that don't fully meet the requirements (not matched, slightly under capacity, etc. - cells that just won't do for vehicles). Once a cell sits in a warehouse for a certain amount of time, they are not considered anymore for things like vehicles. The cells are never used, they just sat around. At some point, there was a surplus of EVE cells that they got rid off through brokers/resellers. Now that it's demonstrated there is a market for that, others jump on the wagon. At least one vendor cells new cells directly from EVE. EVE doesn't like dealing with individual customers, which is why their prices for cells on their web store are so high: these are samples, companies don't care about the price. Once you buy a container full of them, the price drops below what we're paying per cell.
 
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JimmyL

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No, they are (for most vendors, at least the ones that are somewhat reputable and where members of this forum worked with) new old stock or cells that don't fully meet the requirements (not matched, slightly under capacity, etc. - cells that just won't do for vehicles). Once a cell sits in a warehouse for a certain amount of time, they are not considered anymore for things like vehicles. The cells are never used, they just sat around. At some point, there was a surplus of EVE cells that they got rid off through brokers/resellers. Now that it's demonstrated there is a market for that, others jump on the wagon. At least one vendor cells new cells directly from EVE. EVE doesn't like dealing with individual customers, which is why their prices for cells on their web store are so high: these are samples, companies don't care about the price. Once you buy a container full of them, the price drops below what we're paying per cell.
So do you think these Alibaba vendors have enough cash to buy these cells by the container load? Surely there is a company that actually sells brand new cells like any other product.
 

upnorthandpersonal

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So do you think these Alibaba vendors have enough cash to buy these cells by the container load?

No, these vendors are getting the cells that are new old stock as I mentioned.

Surely there is a company that actually sells brand new cells like any other product.

The only company that we (as in, members of this forum) are pretty highly confident of that sells brand new EVE cells is Shenzhen Luyuan.
 

Hedges

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The only problem is that despite using a torque wrench set to 3.5 nM, 5 of the laser-welded studs popped off. I'm working with a local company to get them rewelded now and so far the Alibaba vendor support has been very good. We'll see what happens when it comes time to pay for the work.

Do you think that was just from torque, or from tilt peeling it at one edge?

If you use an extension to the socket and balance it with your other hand, that should eliminate prying force. It also eliminates radial loading on the threads for less friction, higher clamping force for a given torque.


The vendor told me they have changed their QA procedures to better test the studs for future orders.

I could imagine it is possible for laser weld to be quite shallow.
QA (pull, torque, or pry test) should keep bad welds from being shipped.
Samples tested to higher force, possibly destructive, should be done for process control.
 
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