Beginners Guide to Processing 18650 Cells | Cell Database


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IFR 26650 Powerbank
#61
isn't 8x8=64 instead of 36?
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#62
yes all confused. its 6x6 Big Grin
Greetz Dennis

http://www.verticallife.nl

Current Of-grit setup
5 230Wp canadian Solar panels
2 Voltmaster 270Ah 12V Battery's
1 Outback flexmax80
1 Phoenix 3000 inverter
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#63
Remember to adjust the Opus to the correct charge voltage, since these cells are only 3.6v, and not 4.2v...! Smile

Ups, old thread... Smile
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#64
@miu Please see the first post where I set my OPUS to charge 3.7V max (these 26650's are nominal 3.3V).

small progress:
The new fusebox is installed so my spot welder is working good.

 
So I started to make square twisted busbars 

 
The 300W iron + flux are working well....I soldered the busbar to the nail.. twice Tongue .

 
4x2 for the 12V RV pack 4S 36P
Greetz Dennis

http://www.verticallife.nl

Current Of-grit setup
5 230Wp canadian Solar panels
2 Voltmaster 270Ah 12V Battery's
1 Outback flexmax80
1 Phoenix 3000 inverter
Reply
#65
small update:


Harvesting cells goes one slowly but steady.
My bike is up and running it needs a BMS/charger.
for the 56V pack.



I'm going to place 36P 4S in my camperbus for a 12V utility battery.

For my tiny house I'm working on a 108P 4S 


I will keep my 2 AGM 270Ah battery's and place the 26650 battery next to it.
A friend of mine offered to design a BMS so I'm looking forward to the result.

It should look something like this:


The big orange pack is for my house the small green one for my campingbus.

in the front a 18650 next to a 26650 for reference/scale.

today will be spot welding time for the negative side.
I still need to order fuse wire.. still unsure whats good
the cells can discharge 70A continues, or 120A peak..
But I will never use it so I take a weaker fuse to be safe.
I will be using my victron inverter that gives 3000vA and peaks 5000vA.
But might want to get another one in parallel one day.. (electric shower heater/electric cooking)

3000VAx 0.8/1000 =2.4kW

2.4kW/108 cells= 22W per cell

22W/3.3V=6.7A per cell 

So I guess a 15A fuse wire will do the job?(in cease I want to use 2 inverters one day)
Greetz Dennis

http://www.verticallife.nl

Current Of-grit setup
5 230Wp canadian Solar panels
2 Voltmaster 270Ah 12V Battery's
1 Outback flexmax80
1 Phoenix 3000 inverter
Reply
#66
Next step: Fuse wire.
I bought 0.2mm tinned, copper wire.
It's rated 5 Amp continuous.
But its actually burning at 9.32 Amps

 

For me thats no problem since the cell's should be able to discharge continuous  at 60Amps and peak at 120Amps.
I will not be asking this much from the power wall. The fuse wire will burn before the cells are anywhere near there peak.

I made the packs 72 Parralel so it can peak around 700Amp.... thats enough  Tongue 

Now I have to find some time for spot welding and get a BMS for LIFEPO.
Greetz Dennis

http://www.verticallife.nl

Current Of-grit setup
5 230Wp canadian Solar panels
2 Voltmaster 270Ah 12V Battery's
1 Outback flexmax80
1 Phoenix 3000 inverter
Reply
#67
My pack for the RV is ready for testing.
 

 I only need a BMS and isolation/protection







hbpowerwall likes this post
Greetz Dennis

http://www.verticallife.nl

Current Of-grit setup
5 230Wp canadian Solar panels
2 Voltmaster 270Ah 12V Battery's
1 Outback flexmax80
1 Phoenix 3000 inverter
Reply


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