Need help with automating 18650 tests

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Oberfail

Member
Joined
Jun 22, 2021
Messages
160
Hey, i'll soon get a shipment of over 3000 18650 cells and i could need some help with automating some parts of it.

The process should be the following:
- put cell into RC3563 IR meter & write down voltage & IR | usefull for a soon to be released tool
- capacity test them & write it down
- put cell into RC3563 IR meter & write down voltage & IR | usefull for a soon to be released tool

Ideally, i would like to have one, where i can plug a battery into my IR meter and it fills out the entry voltage & IR before testing and assigns it an ID to it. Then i'd have to press OK to save it to a database. After the capacity has been tested, i enter the ID of the cell and fill out the mAh and press OK again. Then i'll plug it into the RC3563 again to fill out voltage & IR after testing tables in the database.

Sadly i'm terrible at those tasks and could really need some help with automating that and i would be really thankfull, if one could help me out.
 

floydR

Member
Joined
Aug 23, 2017
Messages
1,356
I think one of the IR testers has a serial port I read. If you can figure out how to get the voltage and IR from the meter to a spreadsheet. Buy sequentially numbered stickers. read wolf's threads I believe that is where I read about the serial port.

Later floyd
 

cak

Member
Joined
Mar 14, 2021
Messages
93
Don't forget to test for self discharge. I know based on your IR readings it may not be needed but why not do it anyway. I usually do a main bulk charge of the cells in a parallel charger powered off a buck converter after my first Voltage/IR test. Then I let everything sit for 2-4 weeks and check readings again to make sure nothing dropped too much. Then continue with the capacity testing.

Don't know if I can help much with automation but I know for me once I get a good assembly line going things are pretty quick. The Capacity testing recharge usually seems to be the bottleneck so when I am paying attention I pull cells off once I have a reading and bulk charge elsewhere.
 

Wolf

Active member
Joined
Sep 25, 2018
Messages
1,652
Don't forget to test for self discharge. I know based on your IR readings it may not be needed but why not do it anyway
Absolutely! Matter of fact I do it twice Once at ≥25 days after capacity test and then one final time after I sort the cells with the excel Repakr assigning each cell to a pack, row and slot. Before I commit any cell to a pack it must pass all these tests.
Automation is achieved with a RC3563 IR tester with the cell holder fixture and some code I cobbled together . See https://secondlifestorage.com/index.php?threads/rc3563-ir-tester.8380/post-79687
If you want to see the whole Workbook of my 4th Battery here it is. https://1drv.ms/x/s!AmNMFw8cEOSHgbdtT6GpRmVGlHkqcw?e=H9D9JP
Wolf
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