For those looking for 30q cells, I’ve managed to secure a decent quantity from nkon, through liion wholesale, at very good prices.
Both nkon and liion wholesale have proven to supply 100% genuine cells.
I’m selling them for $4.20 (hehe) a cell, that’s 50 qty prices at imrbatteries or liionwholesale. If you’re looking for a large amount, more than 50 cells, you’re probably better off getting it from them.
My prices are better if you need smaller quantities.
http://www.esk8life.com/samsung-30q-18650-cell
Additional battery build service
Parallel group build service
It’s in the product description but the added service will combine your cells into parallel groups, using the following:
- 10mm x 0.15mm pure nickel
- Rounded edges to avoid marring cap insulator
- Cap Insulator
- Fish Paper applied to positive terminals
- Spot welded with the Boss Welder
- Positive / Negative buss welded onto nickel, NOT PCB
- Nickel to PCB copper weld is rather weak, so using nickel as the bus lends a lot more strength
- Hot-glued onto Batt-PCB
Why the PCB? Checkout @akhlut’s wiki: http://github.com/akhlut/BATT-PCB/wiki
Battery Pack Build Service
http://www.esk8life.com/battery-pack-build
Only available with Parallel group build service
Combines parallel groups into a complete battery pack.
Serial connections are made with 1/2 inch copper strand.
Main + and – leads with 10awg silicone wire.
Result of this build yields a flexible pack (to a certain extent), and more importantly, is modular so P groups and various components can be replaced.
You have the option of a serpentine or “U turn” configuration (see product description).
Whole pack is covered in clear PVC shrink, and appropriate insulation applied using kapton tape, reinforced tape, and foam insulators.
Three feet of clear PVC shrink will be included in the package if you plan on installing your own BMS
Optional: Select “Perform QA” to perform a discharge, then full charge, then discharge to storage voltage (3.6v). Cell voltage will be measured at each cycle to ensure pack is in balance. This option will add 3-4 days to lead time.
BMS Install Service
http://www.esk8life.com/bms-install-service
Only available with Battery Pack Build Service, and purchase of a charge-only BMS
Installs BMS balance leads and BMS power connections.
BMS connections (P-, B-) are terminated with 3mm bullet connectors.
How to Order
Let’s say you need a 10s4p pack, want it built into a pack with a BMS installed.
- Add 40 cells, with the 4p build option selected, then add to cart.
- Then add the Battery Pack Build Service
- Then add a 10s BMS
- Then add the BMS Install Service
Photos
Please keep in mind these are demo shots using dead cells. Your order will be made with BRAND NEW cells.
Glued garallel groups, using a jig
Cap insulator and fish paper applied to positive terminal
Bound to PCB
Positive terminal
Negative terminal
Bus connections (nickels lengths will be perfectly precise in production builds)
Battery Pack Build
BMS Installed
Q&A
Who is this for?
The DIY builder who wants control of all aspects of their build, including the battery. Because the build service is modular, you can order a little (bare cells) or a complete pack, and fill in the rest yourself.
Who is this NOT for?
If you’re looking for a complete build, or want a fully integrated solution, this probably isn’t a good fit.
Does this include battery / volt meter, connectors, and/or switch (loopkey, anti-spark)?
No, you will install those things yourself.
Where are the fuses?
Pack fuse is not included, but you can install one pretty easily.
I don’t believe cell-level fusing is appropriate for low P count batteries (chaka’s probably going to kill me). Cell-level fusing makes sense in massive parallel packs but not for smaller packs with high discharge demands.
I may consider cell fuses, but will likely incur an additional cost as it’s much more labor intensive.
Anything other than 3P or 4P?
No, not at this time, sorry.