CHEAP NEW ORIGINAL 18650 21700 BATTERY CELLS, POUCHES AND PACKS
- Thread starter tumich
- Start date
cwah
100 MW
i would bin the cell with the bump on it. I had a bump on one of my US18650V3 cell and it became a hole later on.
Hopefully it didn't exploded, but you are never too sure.
Safety first!
Hopefully it didn't exploded, but you are never too sure.
Safety first!
pdarnett said:Already wrapped up in tape and in my metal bin full of sand.
Did you notice I'd scored a real bargain on a charger recently?
I didn't notice that this cell was damaged. Maybe my fault or deliverer. I thought that I checked all
If sometimes some cells are damaged in pack I always write to buyer about it and I add bonus cells.
I will make refund for that ofc or bonus cells in next order (if will)
LG cells are really as good as promised, despite the very little information available, I've tested them and pretty sure they are 2850mah as rated. Under 0.5C not voltage sag appreciable. This is my report and pack made with those cells. Thank You tumich! You will be legend.
[youtube]5L9hOVG_0RQ[/youtube]
[youtube]5L9hOVG_0RQ[/youtube]
cwah
100 MW
pdarnett said:Already wrapped up in tape and in my metal bin full of sand.
Did you notice I'd scored a real bargain on a charger recently?
Yes you indeed got a very good deal. The 24V 200W power supply is a completely fanless and robust power supply as well as the 600W DC-DC converter with CC-CV. You should be happy with it if you need high voltage silence charging.
jimwebo
1 W
http://es.aliexpress.com/store/product/free-shipping-1m-long-10WX0-15T-mm-Pure-Ni-plate-Nickel-strip-tape-for-battery-welding/209428_875078077.htmlpdarnett said:
pdarnett said:
Thanks!
in the video You can see these, 19$ 10m: http://aliexpress.com/item/Free-shi...ylindrical/2050759694.html?recommendVersion=1
And if You don't mind a little more work, those has an unbeatable price/weight, just made "two paralleled bridges and two layers" I've used those ones also and are very much easier and quickier to spot weld: http://aliexpress.com/item/100pcs-N...-Equipment/1688446800.html?recommendVersion=1
999zip999
100 TW
What do you have that are nca ?
Honk said:
Same. Better calendar life/energy density than NCM (IMR-xxx), but less power density, it seems. But they can still accept a pretty good charge rate, and their capacity loss really slows down after 80%. So they're an awesome choice for anything that doesn't need power density.
Honk
100 W
- Joined
- Oct 10, 2011
- Messages
- 230
Really love NCA if they keep up to their promises.
I have ordered 200pcs of Samsung INR18650-29E and will build 2 sets of bike batteries.
Each build contaning 96 cells in 8p12s configuration. With BMS and equalization charger.
The good thing is that I can use them as well with my outboard trolling motor (with a DC-DC convertor down to 12V).
Very sturdy and lightweight compared to equivalent power from SLA's.
I have ordered 200pcs of Samsung INR18650-29E and will build 2 sets of bike batteries.
Each build contaning 96 cells in 8p12s configuration. With BMS and equalization charger.
The good thing is that I can use them as well with my outboard trolling motor (with a DC-DC convertor down to 12V).
Very sturdy and lightweight compared to equivalent power from SLA's.
Honk
100 W
- Joined
- Oct 10, 2011
- Messages
- 230
Great news... I just received my 200pcs of Samsung cells.
They were very well packed with separating paper walls between the cell packs.
Each pack was well wrapped in thick layers of bubble wrap and tape.
The parcel was fully filled up with soft newspaper as cell protection.
All packs have a measured resting voltage of 36V (3.6V per cell).
Only one of the packs left me wondering due to some white dust covering the pack at several areas all over. (The far right pack)
Could it be that this pack have been previously used and the cells is not new or it the dust coming from some other source?
The dusty pack has 3.6V per cell resting voltage so that part seems fine. Hopefully the dusty pack is all new and OK.
They were very well packed with separating paper walls between the cell packs.
Each pack was well wrapped in thick layers of bubble wrap and tape.
The parcel was fully filled up with soft newspaper as cell protection.
All packs have a measured resting voltage of 36V (3.6V per cell).
Only one of the packs left me wondering due to some white dust covering the pack at several areas all over. (The far right pack)
Could it be that this pack have been previously used and the cells is not new or it the dust coming from some other source?
The dusty pack has 3.6V per cell resting voltage so that part seems fine. Hopefully the dusty pack is all new and OK.
Attachments
bklynjim
1 mW
Hey Guys,
I need to resuscitate my A2B Metro internal frame pack. The configuration in 20S2P. This would be my first battery build so I'm looking for advice and answers to some very basic questions. Am I right to assume that I would be able to use most of the current spot welds on these Samsung cells? Could I do the rest with an 80W iron? Thanks guys!
I need to resuscitate my A2B Metro internal frame pack. The configuration in 20S2P. This would be my first battery build so I'm looking for advice and answers to some very basic questions. Am I right to assume that I would be able to use most of the current spot welds on these Samsung cells? Could I do the rest with an 80W iron? Thanks guys!
jimwebo
1 W
Hello.
Although the ideal is spot welding.
You can solder iron whenever you leave part of the plate of cells and welded on it, not to give too hot to cells.
A greeting.
Although the ideal is spot welding.
You can solder iron whenever you leave part of the plate of cells and welded on it, not to give too hot to cells.
A greeting.
bklynjim
1 mW
Thanks pdarnett. Did you reuse the connectors or create that from scratch? Are you using a spot welder? I think I need to do some more homework before jumping into this project.
velovelo
1 mW
sent you a PM
docnjoj
1 GW
I guess mine are still on the"slow boat".
otherDoc
otherDoc
