Glubux

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Total Cells: 8500

Total Capacity: 56.61 kWh Location:Posts: 47Threads: 3Joined: Nov 2016Reputation: 14 Total Cells: 8500Total Capacity: 56.61 kWh #1



I already produce a part of the electricity that I need. I have 1.4 kw of solar panel on the roof, an old 24v 460AH forklift battery, a Victron MPPT 100/50 charge controler, an 24v to 12v Victron voltage lowerer, and a 3KVA Victron inverter.



The plan is to build a shed to put all the batteries and the charge controler/inverters.



I started to collect laptop batteries a few months ago, I have around 650 for now, I started sorting and making my packs:









Ideas are :



-100 Ah for each pack by matching the number of cells, possibilty to add or remove cells if needed

-maximum use of copper wire, easy to find and easy to solder

-same bus bar lenght for each cell A quick presentation of my project.I already produce a part of the electricity that I need. I have 1.4 kw of solar panel on the roof, an old 24v 460AH forklift battery, a Victron MPPT 100/50 charge controler, an 24v to 12v Victron voltage lowerer, and a 3KVA Victron inverter.The plan is to build a shed to put all the batteries and the charge controler/inverters.I started to collect laptop batteries a few months ago, I have around 650 for now, I started sorting and making my packs:Ideas are :-100 Ah for each pack by matching the number of cells, possibilty to add or remove cells if needed-maximum use of copper wire, easy to find and easy to solder-same bus bar lenght for each cell jamesk9, shonalex, DK100 And 5 others like this post Find Reply Glubux

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Total Cells: 8500

Total Capacity: 56.61 kWh Location:Posts: 47Threads: 3Joined: Nov 2016Reputation: 14 Total Cells: 8500Total Capacity: 56.61 kWh #2

This is how I test my cells for now : Find Reply Sean

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Total Capacity: 0.00 kWh Location:Posts: 934Threads: 12Joined: Oct 2016Reputation: 10 Total Cells:Total Capacity: 0.00 kWh #3 Your neatness is to be applauded.



Have you tried testing the same cell in each of your dischargers and comparing the results ? Find Reply Glubux

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Total Cells: 8500

Total Capacity: 56.61 kWh Location:Posts: 47Threads: 3Joined: Nov 2016Reputation: 14 Total Cells: 8500Total Capacity: 56.61 kWh #4 Sean Wrote: Your neatness is to be applauded.



Have you tried testing the same cell in each of your dischargers and comparing the results ?



Thank you.



I tested it indirectly by testing a freshly separated pair of cells and capacity was only a few mah different, this happened a couple of time on different chargers so I would say they are not perfect but precise enough. Thank you.I tested it indirectly by testing a freshly separated pair of cells and capacity was only a few mah different, this happened a couple of time on different chargers so I would say they are not perfect but precise enough. Find Reply Glubux

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Total Cells: 8500

Total Capacity: 56.61 kWh Location:Posts: 47Threads: 3Joined: Nov 2016Reputation: 14 Total Cells: 8500Total Capacity: 56.61 kWh #5 Glubux Wrote: Sean Wrote: Your neatness is to be applauded.



Have you tried testing the same cell in each of your dischargers and comparing the results ?



Thank you.



I tested it indirectly by testing a freshly separated pair of cells and capacity was only a few mah different, this happened a couple of time on different chargers so I would say they are not perfect but precise enough. Sparky28 likes this post Find Reply miwall

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Total Capacity: 0.00 kWh Location:Posts: 15Threads: 4Joined: Oct 2016Reputation: 0 Total Cells:Total Capacity: 0.00 kWh #6 Hi like you Idea of using copper wire for busbars what Size cable is this looks like it could be 1.5mm or 2.5mm cable striped from Twin and Earth cable used for house wiring ?

Also what with missing out Batteries in your pack! Find Reply Lux_Gamer

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Total Capacity: 3.11 kWh Location:Posts: 66Threads: 7Joined: Oct 2016Reputation: 0 Total Cells: 420Total Capacity: 3.11 kWh #7 Hello,



I really like your pack design and your fuses.

One question is all that copper not a bit over kill.

Correct me if i am wrong but if it is 2,5mm cable it could handle 16-25 amps.

On the other hand i dont know how much you will pull form that pack.



Lux, Find Reply Glubux

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Total Capacity: 56.61 kWh Location:Posts: 47Threads: 3Joined: Nov 2016Reputation: 14 Total Cells: 8500Total Capacity: 56.61 kWh #8 The copper wire is a 1,5 mm², easy to find, I'm not sure it's overkill, I ll see when I'll put them to the test, anyway it is better to have too thick than too thin. Find Reply station240

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Total Capacity: 0.00 kWh Location: Adelade, AustraliaPosts: 186Threads: 26Joined: Oct 2016Reputation: 3 Total Cells:Total Capacity: 0.00 kWh #9 That size wire is probably about right, as you also have to consider resistance.

I worked out what the resistance of the longest length of wire there is.

0.0022789 Ohm => 2.2789mOhm

So the internal resistance of a cell is higher than the resistance of the wire. Find Reply PaulKennett

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Total Capacity: 22.94 kWh Location:Posts: 89Threads: 12Joined: Oct 2016Reputation: 2 Total Cells: 3100Total Capacity: 22.94 kWh #10 Very tidy pack there. And great colour spread too. Good job.

Paul Kennett

https://www.youtube.com/user/paulkennett

http://www.myonlinediary.com/index.php/Energy/PowerWall

--Paul Kennett https://teespring.com/stores/18650-merch - 18650 t-shirts Find Reply