Uploaded September 2017 | Updated September 2026, 2 weeks ago
Arranging 18650 cells into packs that will spread the capacity even among your tesla power wall!
Reducing balance issues in the end.
-- More information below! --
Disclaimer. This is not a substitute for a good BMS! A BMS will always be needed for proper protection and keeping the cells in balance!
When arranging the cells I always arrange the cells in 100mAh buckets. Always make sure you have enough cells before you assemble any packs so you can easily spread them evenly among all the packs.
This will ensure that you in the end get less work and you dont have to calculate your packs to get them even. You will also end up with even packs in terms of types of cells.
I do not meassure IR due to that i run low current application in terms of current per cell. The IR for me is not that rellevant and the ones with high IR are removed by the discharge test it self.
Im not saying you shouldnt use IR... Thats up to you :)
The testers that is used are generally not that precise so therefore i arrange them in 100mAh buckets. For instance the Opus can easily diff 10% between tests. For instance due to bad contact!
If you want to buy anything i use for my system check links below.
Link to my page including how i process the cells: (It also includes link to the stuff)
http://diytechandrepairs.nu/current-solar-layout/
Links to 18650 Playlist with all videos needed!
youtube.com/watch?v=uyFm1PfmdSE&list=PLOW-knRjfDQccjKxfHxGtkpEtUf_lJCnd
Opus charger (Ebay)
Opus bt3100 charger: goo.gl/PwRR68
18650 Internal resistance tester!: goo.gl/6oFYKC
Well worth its money
SUPER DEAL on 18650 CELLS!
goo.gl/9eXj6Q
Tesla packs super deal!
goo.gl/dZn7UY
-------------------------------
Affiliate links (Using them helps me with this channel)
Ebay: goo.gl/PwRR68
Amazon: goo.gl/VSU4YH
Banggood goo.gl/fcCjJ5
---------------------------------------
Links
To my site and current solar layout:
http://diytechandrepairs.nu/current-solar-layout/
facebook.com/diytechandrepairs
diypowerwalls.com/t-Esperyd-Solar-and-powerwall-system
----------------------------------------
Want to help me out or if you appreciate what i do?
Patreon: patreon.com/DIYtech
paypal@romer.se / paypal.me/diytechandrepairs
By buying the stuff i link to will also yield some extra for me.
And done forget to share my work!
--------------------------------------------------------------
Arranging 18650 cells into packs that will spread the capacity even among your tesla power wall!
Reducing balance issues in the end.
-- More information below! --
Disclaimer. This is not a substitute for a good BMS! A BMS will always be needed for proper protection and keeping the cells in balance!
When arranging the cells I always arrange the cells in 100mAh buckets. Always make sure you have enough cells before you assemble any packs so you can easily spread them evenly among all the packs.
This will ensure that you in the end get less work and you dont have to calculate your packs to get them even. You will also end up with even packs in terms of types of cells.
I do not meassure IR due to that i run low current application in terms of current per cell. The IR for me is not that rellevant and the ones with high IR are removed by the discharge test it self.
Im not saying you shouldnt use IR... Thats up to you :)
The testers that is used are generally not that precise so therefore i arrange them in 100mAh buckets. For instance the Opus can easily diff 10% between tests. For instance due to bad contact!
If you want to buy anything i use for my system check links below.
Link to my page including how i process the cells: (It also includes link to the stuff)
http://diytechandrepairs.nu/current-solar-layout/
Links to 18650 Playlist with all videos needed!
youtube.com/watch?v=uyFm1PfmdSE&list=PLOW-knRjfDQccjKxfHxGtkpEtUf_lJCnd
Opus charger (Ebay)
Opus bt3100 charger: goo.gl/PwRR68
18650 Internal resistance tester!: goo.gl/6oFYKC
Well worth its money
SUPER DEAL on 18650 CELLS!
goo.gl/9eXj6Q
Tesla packs super deal!
goo.gl/dZn7UY
-------------------------------
Affiliate links (Using them helps me with this channel)
Ebay: goo.gl/PwRR68
Amazon: goo.gl/VSU4YH
Banggood goo.gl/fcCjJ5
---------------------------------------
Links
To my site and current solar layout:
http://diytechandrepairs.nu/current-solar-layout/
facebook.com/diytechandrepairs
diypowerwalls.com/t-Esperyd-Solar-and-powerwall-system
----------------------------------------
Want to help me out or if you appreciate what i do?
Patreon: patreon.com/DIYtech
paypal@romer.se / paypal.me/diytechandrepairs
By buying the stuff i link to will also yield some extra for me.
And done forget to share my work!
--------------------------------------------------------------
