3PHASE
3PHASE
After reading this, I checked my notification log, and got the vcfront message on June 4 and June 5, but at night while it was plugged in. Installed v3 several weeks ago. On fsd beta 2022.12.3.20 too. I don’t drive the car every day.
-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Ohmmu 12V Battery Feedback
- Thread starter LasVegas2019
- Start date
3PHASE
3PHASE
What's the worse thing that could happen, other than maybe it wouldn't install software updates?
Reading this thread, it seems problems only affect 3 and Y. How much older model S. I have a 17 S, so far the original OEM still works but I am wondering whether it is safe to replace it proactively. I can wait till the original dies and since I have extended warranty, I think it is covered, but certainly don’t want to be stranded or long wait for parts.
According to the owner of Ohmmu, they are running about 10 test vehicles with an additional 10 coming online for test this week. They are going slow on the gen 4 until satisfied with test results. Perhaps ask to be a Beta tester for them.
It's now been over two months with the Ohmmu Ver.3 battery with no issues. This is in a 2018 dual motor long range model 3 with software 2022.12.3.20
I'm almost at 5 months from just charging my battery up with no more errors. Several updates and even had the car sit for over 2 weeks not driven.
Mine is the v2, bought last year June 2021.
Mine is the v2, bought last year June 2021.
If there are no alerts in the notification section makes me wonder if there was a change to the software in the most recent updates.
Mrbrock
Active Member
Guess they are suggesting a new unused battery should hold more than 70% soc between manufacture and installation. If it’s below this it is either really old or faulty.
Mrbrock
Active Member
Yes it is. The procedure quoted from the service manual is specifically for installing a NEW battery. NEW is mentioned 3 times in the quoted paragraph.
Weird, I now have an alert from 6/28 showing vc front error. It didn't show up a few days ago when I checked. I guess I should expect to start seeing 12v errors pop up soon.
Although I'm using a different lithium battery, I believe the VCFRONT_a180 errors I have been seeing recently (one or two popped up as active errors, while the vast majority occur passively and sporadically in the notifications section) may be related. I have been running the Braille G30HD lithium 12V battery in my model 3 performance since december 2018 with no issues until recently. Note the Braille battery doesn't have a BMS, so I thought the battery was actually dying, but i tested the voltage (13.3V) and did a 100A load test (voltage at 12V after 10sec of 100A discharge) and everything checked out fine.
After the most recent vehicle firmware update to 2022.16.2, I noticed that the voltage waveforms have changed, in that when the battery is already at ~13.3V, it no longer blindly charges it at 14.2V for 1-2hrs. In addition, the frequency of passive VCFRONT_a180 has decreased, and only has happened once in the last week. My hunch is that for passive VCFRONT_a180 errors, they can be ignored if you're able to confirm that the voltage at the battery posts (I have a bluetooth based voltage monitoring device attached and read the voltage from my phone) is correct, and the errors only arise because there is some battery behaviors that the car isn't expecting, but ability to perform all necessary functions isn't actually impacted.
After the most recent vehicle firmware update to 2022.16.2, I noticed that the voltage waveforms have changed, in that when the battery is already at ~13.3V, it no longer blindly charges it at 14.2V for 1-2hrs. In addition, the frequency of passive VCFRONT_a180 has decreased, and only has happened once in the last week. My hunch is that for passive VCFRONT_a180 errors, they can be ignored if you're able to confirm that the voltage at the battery posts (I have a bluetooth based voltage monitoring device attached and read the voltage from my phone) is correct, and the errors only arise because there is some battery behaviors that the car isn't expecting, but ability to perform all necessary functions isn't actually impacted.
The below waveforms are what I have been observing on my Braille battery, and perhaps show the background VCFRONT_a180 errors as being side effects of some testing/characterization that the car is doing. Are you all observing something similar?
Here's a voltage waveform with the cursor at the timestamp of a background VCFRONT_a180 error. On other days when I'd see the error in the notifications, it would always be preceded by a similar waveform with a rounded dip downward, then settle back at 13.3V for the rest of the night and into the morning:
Here's a more recent waveform after the update to 2022.16.2, where I no longer see all the repeating jagged peaks that would precede a background VCFRONT_a180. No errors occurred on this day, and it seems to stay at the 14.2V area for a much shorter time. However, it spends a lot more time at 13.4-13.6V :
Here's a voltage waveform with the cursor at the timestamp of a background VCFRONT_a180 error. On other days when I'd see the error in the notifications, it would always be preceded by a similar waveform with a rounded dip downward, then settle back at 13.3V for the rest of the night and into the morning:
Here's a more recent waveform after the update to 2022.16.2, where I no longer see all the repeating jagged peaks that would precede a background VCFRONT_a180. No errors occurred on this day, and it seems to stay at the 14.2V area for a much shorter time. However, it spends a lot more time at 13.4-13.6V :
Good info keep posting. It is possible Tesla changed the charging and maintenance profile. What are you using to measure the wave forms?
Last edited:
I am on 2022.16.2
I am getting the error as a passive error. No active errors are shown when I get in the car to drive.
Consider adding the battery monitor module so you can see what the charging system is doing when the errors are generated. Very inexpensive and takes 5 minutes to install. The V4 battery is supposed to correct this but the more data the better.
So ive had the V4 battery for 2 weeks now and havent had any issues like before. Been doing everything the same, using sentry, cabin overheat and check the voltage of the battery daily and its staying at 14volts consistently. When i received the new battery i also put it on a trickle charger meant for Lipo batteries to get it fully charged before i installed the battery.
Similar threads
- Locked
- Marketplace listing
