Beginners Guide to Processing 18650 Cells | Cell Database


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arduino/esp based BMS
#1
I'll be using The 7210A to charge up my pack since it will be a small system (520watt system) and a grid tie inverter with limiter.

I have an ESP32 on order to see if I can a) monitor voltages (14s) and b) create a discharge circuit  of around .75 - 1.0 amps

ESP32: https://learn.sparkfun.com/tutorials/esp...okup-guide
How to read multiple analog Read sensors (should apply to voltage readings i think): https://forums.adafruit.com/viewtopic.ph...7&start=60
Discharge circuit: 
https://www.youtube.com/embed/OBlmPQVaO4E

Good idea? has any one tried these methods or have had success/failures?
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#2
Check out BQ76940 that do all above in same unit kind of Smile
Follow me! >> YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcomming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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#3
(05-22-2017, 04:46 PM)daromer Wrote: Check out BQ76940 that do all above in same unit kind of Smile

Looks good. I will probably still try to use the ESP to send all the data to a server. I feel like this will be a year long project.
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#4
I did draw up a design with ESP with the BQ but never finnished it. I do have it somewhere if you want it or Smile
Its not tested nor did you check all components. I left out the balancing part though. But can be added fairly easy if wanted
Follow me! >> YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcomming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply
#5
(05-22-2017, 08:09 PM)daromer Wrote: I did draw up a design with ESP with the BQ but never finnished it. I do have it somewhere if you want it or  Smile
Its not tested nor did you check all components. I left out the balancing part though. But can be added fairly easy if wanted

wouldn't hurt. Thanks!
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