So it’s basically down to the i2c isolator not working at lower voltages and wanting the system to be comparable with other cell chemistries other than standard lithium. That makes since.
Is there any work being done on the ESP controller board to be able to cut power to the load of the entire pack if one of the cells reports under-voltage or some other error? (Either through a relay or power mosfets.) From my current understanding the ESP only collects and reports each cell’s status.
Looks good, I hand solders my first one too. I had mine installed for about a week. They initially started great but then I started getting more and more false figures till all but one wasn’t working. Going to look at the code modifications to see if I’ve broken anything. I need to double check the validation code as the rogue readings are getting through to grafana which shouldn’t be happening.
I’ve been following along for the past few weeks and have been working on a parts list this weekend. I have published my current working list here. I have found everyone on Mouser and Element14 and prices are in Australian dollars.
During my search for parts I noticed a slightly cheaper I2C isolator and wondered whether the Texas Instruments ISO154x-Q1 isolator (ISO1540QDRQ1) would work as alternative to the ADUM1250ARZ. From my very limited understanding they do look similar, and have the same pin layouts and dimensions. Thoughts?
Hi Jesse C, Your list is handy if you want it fast but …some items are expensive over there!!! Take a look at my list above on Aliexpress the Adums are 1/3th of the price!!
After many hours of hand soldering…
Got them installed on my battery pack. I am occasionally seeing the bars shoot up to 64v but besides that it is working well.
