Would this battery be any good? (ICR18650-26F cells)

[The Stig]

Anyone bought this battery or know if these cells are any good? This would be a 36V replacement battery for certain production 24V ebikes. (In my case an E-moto Ridge 3.0, BTW I've changed the controller. Still wondering if the stock controller could handle 36V)

Model: BX3632
Cells: Samsung ICR18650-26F

http://www.amazon.com/BiXPower-Electric-Bicycle-Capacity-BiXPower/dp/B00987T9J4

http://www.power4go.com/36v-8ah-e-bike-high-power-lithium-ion-battery-bx3632h/

 

[Hillhater]

It is quoted as a 4lb weight pack, so say that 3lb of cells ( 1.5kg) and each cell is 50gms ( 47 to be exact).
So that would suggest there are 30 cells inside, and for a 36v pack that would imply a 10S, 3P config.
Each cell is rated at 5.2A max discharge, so the pack should be rated for 15.6A max discharge
..Probably more like 8-10A continuous.
=( 350W continuous, and 560W max. discharge)

..is that enough for your needs ?
Neat battery package system.
Note:- the second link says the cells are Panasonic ?

 

[The Stig]

The manufacturer does have a slightly higher capacity variant with Panasonic cells: CGR18650CG
If those cells are any better...?

http://www.bixnet.com/bx3691.html

It will be driving a bafang motor so the motor limits me to what 20A cont. For reliable yearlong running? My cell man eb3 6fet goes down to 14A current limit I think... It says 7A in the software but I think the controller runs at double the set limit.

 

[The Stig]

Hmm seems like the one with the sumsung cells is the newer version of the one with the Panasonic cells... So I bought one off of ebay, bx3632. Main reason is my bike already has that type of battery mount.

The only other ready made removable lockable battery I know of with good cells are these from cell man, but they wouldn't fit on my bike. http://em3ev.com/store/index.php?route=product/product&product_id=161

 

[d8veh]

The case is a standard part, There's loads of different manufacturers that use it, and there's lots of different cells that they put inside. They normally have 40 cells inside, so the range of capacities is 8.8aH to 11.6aH. The 11.6aH ones have the high-discharge Panasonic NCR18650 PD (or similar) cells, so are the best. The weight is normally about 2.5kg, so the one that says 4lb may only have 30 cells, so I'd avoid it unless light-weight is a priority. The mounting system is not very strong, and I've seen a couple of reports of broken ones, so I wouldn't use that type for off-road use unless you can give it a bit of extra support.

 

[The Stig]

Do you know any reliable or ebay sellers with the 40cell batteries?

I have 14 days to return it after receiving if I find something better.

The problems I've had with this type of case is waterproofing. The seem to come really badly waterproofed.

 

[d8veh]

Waterproofing is always a problem. A disposable shower cap should fit nicely over your one to keep it dry.

 

[The Stig]

Liberal applications of silicone work too :lol:

 

[The Stig]

Alright so I got the battery mounted. I'm programming the controller now but don't know what to put as the LVC... Samsung says something to the effect but don't know how practical it is.

3.10 Discharge Cut-off Voltage: 2.75V

http://www.produktinfo.conrad.com/datenblaetter/250000-274999/251024-an-01-en-LiIon_AKKU_SAMSUNG_ICR18650.pdf

 

[d8veh]

Program your controller to cut off at 31V.

 

[The Stig]

The black stuff smeared in certain places of the battery is silicone. a lot of silicone.

I still need to do the finishing touches and cover up the hose clamps - somehow...