LF280K EVE cells FAKE Grade A cells !
- Thread starter LaFabrik
- Start date
sunshine_eggo
Happy Breffast!
There is no such thing as "A" grade cells. It's a marketing term. Cells are either EV grade or not. When EVE sells non-EV grade cells, they laser over the QR code with a big "B" - which as come to be known as "B" grade.
You have likely procured from a particularly lazy seller who couldn't be bothered to obliterate the old one before lasering on the new one.
On the other hand, the QR code under the cover is short.
On the other hand, the QR code visible when the cover is in place is wrong:
www.gobelpower.com
You have likely procured from a particularly lazy seller who couldn't be bothered to obliterate the old one before lasering on the new one.
On the other hand, the QR code under the cover is short.
On the other hand, the QR code visible when the cover is in place is wrong:
LiFePO4 Cells QR Codes Decoder : GobelPower.com
GobelPower.com : LiFePO4 Cells QR Codes Decoder - China Lithium Battery Distributor and manufacturer, Offers LiFePO4 Battery, 18650 Battery, 12V/24V/48V/72V Rechargable Lithium Battery for Home Solar Energy Storage, Electric Bikes, Scooters, Forklifts, Sweepers, Mowers and Boats.
Ampster
Renewable Energy Hobbyist
I have similar cells and they work fine in my 3P16S pack. Years ago I converted a VW to an EV and bought some Winston cells that were expensive but they were well matched and performed well for that EV. They were also $300 per kWh and were able to sustain brief discharge rates of 2 or 3 times their Amphour capacity. That was important for an EV but not important for a stationary pack that might see discharge rates never even close to half of the Amphour capacity. In C rate terminology, the EV cells could discharge briefly at 2-3 C and the EVE cells never go higher than 0.3-0.5C.
Quattrohead
Solar Wizard
CE approved and little rubber nipples, what's not to love.
Thanks for this information,There is no such thing as "A" grade cells. It's a marketing term. Cells are either EV grade or not. When EVE sells non-EV grade cells, they laser over the QR code with a big "B" - which as come to be known as "B" grade.
You have likely procured from a particularly lazy seller who couldn't be bothered to obliterate the old one before lasering on the new one.
On the other hand, the QR code under the cover is short.
On the other hand, the QR code visible when the cover is in place is wrong:
LiFePO4 Cells QR Codes Decoder : GobelPower.com
GobelPower.com : LiFePO4 Cells QR Codes Decoder - China Lithium Battery Distributor and manufacturer, Offers LiFePO4 Battery, 18650 Battery, 12V/24V/48V/72V Rechargable Lithium Battery for Home Solar Energy Storage, Electric Bikes, Scooters, Forklifts, Sweepers, Mowers and Boats.
i think the visible QR code seem's good
yes i did run the capacity test by myself, it is ok
so i'm little confuse, Are these cells grade A or not? why there are 2 QR codes, one of which is hidden under the sticker!
@sunshine_eggo already answered that question for you. @Alkaline is our resident QR authority but they look fine and if they meet claimed capacity, what’s the problem?
ultimately there is not really a problem, however what I do not appreciate is that the seller certified to me that the cells are grade A
Alkaline
Solar Wizard
You need to get rubbing alcohol and remove the glue around the qr code to be sure. But that white sticker on the side is generally a sign of grade B, here are some examples once cleaned:
Nightguest: https://diysolarforum.com/threads/e...en-qishou-technology.69614/page-2#post-883224
Wepower: https://diysolarforum.com/threads/docan-power-bad-experience-beware.61866/#post-773779
This is how they look with the B code: https://diysolarforum.com/threads/e...s-using-new-marking-method.40287/#post-509479
Grade B can easily pass capacity test so that's not a way to find out the difference, mostly the main issue with grade B is that keeping them in balance is difficult so you have to use an active balancer or some other thing to keep them happy.
Now with some grade B it can get ugly, they can leak, have really bad capacity issues, or other issues that render them unusable, judging form the forum I would say between 5-10% of grade B are just trash, hopefully you didn't get any of these.
Attachments
Alkaline
Solar Wizard
Well remove the glue with rubbing alcohol or some solvent frist to be 100% certain. It will take a long time but this is the only way to be sure.
If those two QR codes on the top aluminum housing are what I suspect are legitimate laser etched, it’s going to be a long rub. I would be very hesitant to get any solvent on the blue burst disk protector or on the terminal insulators.
Alkaline
Solar Wizard
Truth must prevail, worth it.
i used isopropylique alcohol
Quattrohead
Solar Wizard
That is some bullshit right there. I'm not going to be buying anymore cells anyway, but if I was it wouldn't be so called grade A on principle, fuck those lying bastards.
Any cell that you do not buy direct from the manufacturer is grade B/manufacture reject.
Any cell that you do not buy direct from the manufacturer is grade B/manufacture reject.
