My adventures


MASSIVE restock of EV Batteries at www.batteryhookup.com 5% coupon "POWERWALLS"

daromer

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Oct 8, 2016
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Should be fine. Dont forget fuses and switches on the battery and solar side to. Including lightning protection if thats an issue in your area.
 

Ivo Staelens

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Aug 21, 2017
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Good evening all.

I updated the off grid setup schematic. Any remarks are very welcome.

Regards
image_lyxhfl.jpg
 

Ivo Staelens

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Aug 21, 2017
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109
Woehoe,


I scored three e bike batteries yesterday, total cell count 280 cells. Only disadvantage of those e bike batteries is that they are bitches to open... The ones I scored needed a disc grinder and some elbow grease to open them.

One battery had 40 cells, the other two 70 cells each... Let's hope I'll score some decent cells from that bunch.
 

wimpie007

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Apr 8, 2017
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81
What brand/type were they Ivo?
All packs I've collected so far had screws (normal philips head, Hex or Torx) to hold them together.
 

Ivo Staelens

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Aug 21, 2017
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109
There were screws, but I don't have the correct screwdriver, so I did it the rough way, it also worked :)
 

Ivo Staelens

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Aug 21, 2017
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Part two of my adventures has begun. With the already collected batteries i will build a 7s54p battery netting 3,3kwh of storage capacity. For starters i need 800 wires of about 10cm. This evening i made 316 of them. In the end i want to put my crypto miner off grid. This as a test case for a complete off grid setup. Let the adventure begin
 

rodagaster

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Feb 9, 2018
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16
Korishan said:
True. So far I haven't had an issue with 12V loads on modern psu's. The 5V rail I use on my other psu seems to be just fine as well, although, it is about 10yrs old. The former is about 1yr old and works fine. Though, I do use a psu tester to turn it on, so that might account for the load req'd to keep it running. Hrmm, I might wanna check that out as some point *ponders*
Hi Korishan i have changed a few of the old psu's and all i do is connect a 10ohm-10watt resistor to any red plus grd (black) and i have no problem with them ,i have just finished my little charge and discharge station it's a bit rough but works okay.
image_kxizmb.jpg

image_tcqggg.jpg
 

Ivo Staelens

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Aug 21, 2017
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109
In the mean time I've been keeping busy. The little power box has been used several times now and is staying reasonably balanced. I already charged and balanced it several times with my hobby RC lipo charger and it also works.

I am working on a big ambitious project to make heat and electricity of biomass, so that's why the powerwall project was a bit on the background.

Recently though I restarted collecting and testing cells, so I am back in business!
 

wim

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Apr 6, 2017
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556
IvoStaelens said:
I am working on a big ambitious project to make heat and electricity of biomass, so that's why the powerwall project was a bit on the background.

Hmmm interesting, what kind ofbiomass? something new?
 

Ivo Staelens

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Aug 21, 2017
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wim said:
IvoStaelens said:
I am working on a big ambitious project to make heat and electricity of biomass, so that's why the powerwall project was a bit on the background.

Hmmm interesting, what kind ofbiomass? something new?

At first I'm trying to make it all run with pellets. In the end I want to make it run on chipped clippings of garden cuttings. I have 26 willows in my garden (planted them three years ago with this project in mind)

What I'm designing and building doesn't exist on the market. I started from scratch a year ago, four years ago the idea was born. I thought and planned for three years and a year ago I started designing and building.

If you're interested, I have a closed face book group where you can follow the project, just let me know!

At this moment I have an 80% working heating skid and last year, me and a master student built the electricity generating part. That last one hasn't worked for now, but I'll get there :)
 
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Ivo Staelens

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Aug 21, 2017
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I still have heaps of work to do before it can even be communicated to the world... You're always welcome to come and have a look :p
 
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Ivo Staelens

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Aug 21, 2017
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Just an update. I am testing cells again with the diy test stand.

The collection of good cells is growing and recently most are plus 2500mAh.

Also a picture of recent e bike packs with prismatic cells. I will process those too, too much storage capacity to throw away.
 

Ivo Staelens

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Aug 21, 2017
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Three e bike batteries 44 cells each, and all cells test 0V.......

Another pack with 60 cells around 0,65V.....

That is what you call bad luck.....
 

Oz18650

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Oct 2, 2017
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205
Have you tried to recover any low voltage cells?
There are discussions on the forum about using very low currents being successful. e.g. 1 tp4056 feeding multiple cells in parallel.
With that many cells it might be worthwhile for you?
 

Ivo Staelens

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Aug 21, 2017
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I kind of read about it and decided not to recover the realy low ones.... I just dont know what lead them to go so low and what the consequences are for the cell....

Thanks for the advice though! It is painful to toss 60 cells at once but I do not want to cut corners in terms of safety
 

Ivo Staelens

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Aug 21, 2017
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Ivo Staelens said:
Just an update. I am testing cells again with the diy test stand.

The collection of good cells is growing and recently most are plus 2500mAh.

Also a picture of recent e bike packs with prismatic cells. I will process those too, too much storage capacity to throw away.

I figured it out
image_yikfno.jpg

image_ekyfvu.jpg

image_mewupa.jpg
 

100kwh-hunter

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Mar 2, 2019
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776
I had the same lot of them of what you have on your stairs, I brought them to the recycler two weeks ago.
Nobody wanted to trade them for a six pack....
Last week we drove to Belgium, Lummen, i would be very happy to give to you, or sended.

If i encounter more of them, save them or leave them?
I don't know how it works over there, but ebike dealers in the Netherlands know exactly what to give away or sell, aint much good.....just saying.
 

Ivo Staelens

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Aug 21, 2017
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100kwh-hunter said:
I had the same lot of them of what you have on your stairs, I brought them to the recycler two weeks ago.
Nobody wanted to trade them for a six pack....
Last week we drove to Belgium, Lummen, i would be very happy to give to you, or sended.

If i encounter more of them, save them or leave them?
I don't know how it works over there, but ebike dealers in the Netherlands know exactly what to give away or sell, aint much good.....just saying.

Save them! They are not 18650, but they hold electricity so you can test them the save way and integrate them in ur powerwall ?
 
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