Balancing and capacity test.
So my cells should hopefully arrive February. I'd quite like to be ready for then. Minimising single use items would be great.
Questions first:
1) My ideal
capacity test idea. I'm going to purchase a victron smart shunt 500a, and JBD smart BMS 200a. So my question is this:
Can I use these two for capacity test? (Battery -> shunt -> BMS -> load (load - should this be via inverter? Or can I attach any 12v appliance? Such as LED lights))
If I understand correctly this wiring will allow the shunt to stay on when the test is done, I also plan on having a live screen record video to capture the final stages of the test from the shunts bluetooth, so I can see Ah and get my final capacity (screen record is necessary, because I understand the shunt/ Bluetooth won't store the data).
BMS set to 10v LVD. If this isn't a smart plan, i have listed below a more traditional method(or so I believe).
My main reason for doing it this way, is because I don't want to purchase more stuff, it saves money and is more environmentally conscious.
- If this yields unsatisfactory results I may have to purchase a tester and start over.
- Will this shunt record the total ah? I guess this is my biggest concern!
2) Car battery jump cables..! Is this a good idea to use for capacity testing?
As I'd rather not cut wire and put lugs on for temporary tests.
https://www.amazon.se/dp/B0856PHNLX...t_i_RTDW7P6REMN06QEXGJ9W?_encoding=UTF8&psc=1
Balancing:
- If they seem low SOC, Divide the 12 cells into 4 4s packs in series, charge them with the 8amp charger I use for my car battery (it has a fast charge option, maybe someone can say if that's a good idea to use or not).
-Connect all 12 cells in parallel and charge with a power supply @ 3.6v 10a, until the amps drop down to Zero.
https://www.amazon.se/dp/B071HW378T...t_i_SD8WCHCHBF11PBENPV68?_encoding=UTF8&psc=1
• This step seems fairly straight forward.. or so I hope ?
Capacity test
*If using the smart shunt doesn't work!
-Split the cell up into 4s 12v packs.
-connect capacity tester. Set at zero before connecting to battery. then up the power from the tester and wait until it cuts out and gives a final report.
https://www.amazon.se/dp/B09DF7V98Y...t_i_ZAXB796F2NA21FMXPQXT?_encoding=UTF8&psc=1
I am curious to know if this is a good way to do it.. as most people capacity test each cell, from my YouTube searches. But having 12 cells and 1 tester seems very arduous to test one by one.
- * should I, for some reason top balance again after capacity test? Does the capacity test effect the balancing?
I do hope this makes some sense.