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Portable 18650 charging station.
#1
Hi, 

I needed extra charging capacity because all of a sudden 200 battery packs fell out of the sky.
This time I wanted something light, stealth, silent and portable.
The power supply is a 5V/40A one, it gets fairly hot, measured once 70°C. When all slots are filled it drags +120watts from the grid.
Not visible on picture, but I have a large rocker switch to switch on/off the power supply.
Enjoy the pictures of my built.

The case


TP4056 & holder arrangement.


Portable @work & on the train to work.


Ofcourse doing a great job at home too...







Frank
Korishan, wim, DCkiwi And 1 others like this post
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#2
Thumbs Up 
Sh*t.... I hate to say it, but you beat me on the line here.  Dodgy
I had the same idea and project is under construction....a new thread will be online in 2 or 3 weeks.

But congrats, it really looks nice and It seems really practical.
Batteries harvested: 802 / Usable batteries: 747 (93 %)

Cells tested: 747 (Average: 1878 mAh) / Cells in production: 0 (00 %)

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#3
lol, was there no thread on 18650 addictions ? ... charging cells on the way to- and at work would be a serious case of it  Big Grin

Ohhhh, now i see ... Belgium ... never mind  Rolleyes Wink
___________________________________
18x 300Wp solar off grid and 10x 180Wp solar tracker grid-tie
10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#4
never charge batteries unattended  Big Grin . Thats very clever. And even in the train. Worldclass.  Idea
Korishan likes this post
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#5
(10-03-2018, 06:42 PM)Franky Beuselinck Wrote: Hi, 

I needed extra charging capacity because all of a sudden 200 battery packs fell out of the sky.
This time I wanted something light, stealth, silent and portable.
The power supply is a 5V/40A one, it gets fairly hot, measured once 70°C. When all slots are filled it drags +120watts from the grid.
Not visible on picture, but I have a large rocker switch to switch on/off the power supply.
Enjoy the pictures of my built.

The case


TP4056 & holder arrangement.


Portable @work & on the train to work.


Ofcourse doing a great job at home too...







Frank

Hi Frank, I'm new to 18650 DIY battery packs and am still in the collecting phase. My understanding of electronics is limited. I haven't started processing any cells yet but am learning all I can on this site for now. I like your charger and have two questions:

1) Since I read somewhere that TP4056 doesn't have reverse polarity protection and TP5100 has it, can I just replace the TP4056 with TP5100 in your build without any modifications? Or will I need additional modifications, in which case I would rather just stay with TP4056?

2) Can the charge current be selected? Say I want the cells to only be charged at 500 mA, is there a way of setting that on the TP4056 (or TP5100), or does it only chose its charge current automatically?

PS: I hope I'm not reviving an old thread here. trying to learn some practical knowledge
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