Best18650's
- Thread starter 11spokes
- Start date
bionx 1954
100 W
I use Bosch batteries. They have a 10C rating, Limn chemistry, extremely SAFE, and plug and charge no BMS required
docnjoj
1 GW
I use them too and they are really good! I wish they were easier to get and cheaper.bionx 1954 said:
otherDoc
teslanv
1 MW
The Samsung 25R cells should be excellent as well.
DrkAngel
1 GW
If you are talking 18650 LiCo ... such as are used in laptops etc.
I would recommend Panasonic or Samsung.
They seem to have much better durability than Sanyo or Sony.
All recent models are rigorously tested for safety and typically graphed at a 2C discharge rate.
Seems all major manufactures also produce higher discharge variants that suffer from reduced capacity.
There is always a trade off.
Higher discharge rate = lower capacity and vice versa.
As for safety ...
Almost daily, it seems, I hear another horror story about a LiPo fire!
On the other hand, In this century, the only stories I can recall, about 18650 Li-ion fires, were 2006 Sony cells with "particulate contamination".
Multiple ES members warn against 18650 dangers and have tried to demonstrate this "dangerous behavior".
They seem disappointed and disgusted that they can't create anything "dangerous" ... then ... still maintain their insistence of 18650 danger?
18650 cells, from any major manufacturer, have a better safety record than even LiFe, probably the safest Lithium there is.
Safe enough to be placed in hundreds of millions of homes (laptops).
But watch - 18650 explosions!!!
OK ...
He was able to start a fire ... but most people won't be putting a propane torch on their battery pack!!
Honestly!
Does anyone know of any fire from 18650 LiCo cells? (reputable manufacturer - Panasonic, Sanyo, Samsung, LG, post 2006 Sony etc.)???
I would recommend Panasonic or Samsung.
They seem to have much better durability than Sanyo or Sony.
All recent models are rigorously tested for safety and typically graphed at a 2C discharge rate.
Seems all major manufactures also produce higher discharge variants that suffer from reduced capacity.
There is always a trade off.
Higher discharge rate = lower capacity and vice versa.
As for safety ...
Almost daily, it seems, I hear another horror story about a LiPo fire!
On the other hand, In this century, the only stories I can recall, about 18650 Li-ion fires, were 2006 Sony cells with "particulate contamination".
Multiple ES members warn against 18650 dangers and have tried to demonstrate this "dangerous behavior".
They seem disappointed and disgusted that they can't create anything "dangerous" ... then ... still maintain their insistence of 18650 danger?
18650 cells, from any major manufacturer, have a better safety record than even LiFe, probably the safest Lithium there is.
Safe enough to be placed in hundreds of millions of homes (laptops).
But watch - 18650 explosions!!!
OK ...
He was able to start a fire ... but most people won't be putting a propane torch on their battery pack!!
Honestly!
Does anyone know of any fire from 18650 LiCo cells? (reputable manufacturer - Panasonic, Sanyo, Samsung, LG, post 2006 Sony etc.)???
docnjoj
1 GW
Interesting, DrkAngel. I get the impression that hobby LiPo (pouch cells) are the ones to fear. With Tesla using 18650 cells, and most laptop manufacturers also, I would take precautions like a BMS or cell monitoring with their use. I would not fear them.
otherDoc
otherDoc
Hillhater
100 TW
As with many thing in life, there is no "best 18650" it's a compromise .11spokes said:I am wondering what are the best 18650 batteries for ebike use.
What battery has the highest discharge rate. Best value for money or highest discharge rate and ah combined. And are 18650 battery set ups generally safer than HK lipo batteries?
The cells with the highest discharge rate (A123, or maybe Sony ?), do not have high energy density (Panasonic ?) and neither of those will be the cheapest per Whr !( used laptop cells ?)
So , you need to set you own priorities, cost/energy/power ?... And then seek out the best compromise that suits your individual requirements.
Whatever you decide, choose only "brand name" cells from a proven source as there is a lot of fake and dud cells available from dubious sellers .
Do not believe anything that claims to have more than 3600 mAhr capacity....
Keep well away from anything with "Fire" or "Power" in the brand name !
Hillhater said:Keep well away from anything with "Fire" or "Power" in the brand name !
+1
999zip999
100 TW
Get an Over rated battery for your needs with a little more ah also.
So let's talk about your needs.
So let's talk about your needs.
emcee
100 mW
Without know your application it is hard to recommend a cell best suited to your needs. I can share with you my experience. Don't waste time with recycled cells. It may be tempting given their price point but you will need to replace them much sooner. I got 1 year out of my recycled cell pack before it was toast. I am now using Samsung 29e in a 14s 10p pack. This gives me real world capacity of about 22ah charged to 4.1v/cell discharged to 3.0v/cell. My daily commute uses about 12ah so my battery is really overkill. But worst case scenario if I am down to 60% in 300 cycles, that means in two years I will have about 13ah of capacity. Still enough to get me to and from work. This is all worst case. I hope to get 5 years from this pack.
cwah
100 MW
emcee said:
I'm tempted to buy latest ncr18650b recycled cells for half price. What recycled cells did you buy?
The fingers
10 TW
fechter said:Hillhater said:Keep well away from anything with "Fire" or "Power" in the brand name !
+1
Those are non-rechargeable and are a grest deal for one time use in their flashlights. Must be kept dry until depleted or poof!
tomjasz
1 GW
But so far unobtanium?teslanv said:
teslanv
1 MW
Sammy 25R available here ($6.29 USD/cell, shipped - $326.82 for 52 cells to make 13S4P)
http://www.fasttech.com/product/1686801-authentic-samsung-inr18650-25r-3-6v-2500mah
I should think Paul will have his soon.
http://www.fasttech.com/product/1686801-authentic-samsung-inr18650-25r-3-6v-2500mah
I should think Paul will have his soon.
tomjasz
1 GW
Do you have his pricing?teslanv said:
Ohbse
10 kW
A number of people have had good experiences with the LG HE2 high power 18650's.
These are available from china for $3.75ea in quantities of 200+, only slightly more expensive for a lower number.
I am building a pack soon from these cells, I keep changing the design but think I have finally settled on 20s12p for 2kwh of capacity. This should comfortably support 150amp discharge for ~12kw power potential and will weigh ~12kg including all of the connections and packaging. There are many cells available with various levels of power potential and capacity, the cells you chose will vary wildly based on your application. What sort of power and range do you require?
These are available from china for $3.75ea in quantities of 200+, only slightly more expensive for a lower number.
I am building a pack soon from these cells, I keep changing the design but think I have finally settled on 20s12p for 2kwh of capacity. This should comfortably support 150amp discharge for ~12kw power potential and will weigh ~12kg including all of the connections and packaging. There are many cells available with various levels of power potential and capacity, the cells you chose will vary wildly based on your application. What sort of power and range do you require?
