[TechnicallyJeff]

I respectfully disagree with your post.

As adults, we are entitled to our own beliefs, and I speak from an engineering perspective with a deep understanding of the E-GMP platform and ICCU DC-DC converter software calibrations and logic.
I will refrain from responding in future to your posts because, from my perspective, you as a YouTube advocate are potentially misleading your audience. I hope you will take the time to review some of my posts on the use of 12V batteries with BMS and how different chemistries can deceive people into thinking they have more energy. However, in real-world conditions, when operating voltages are taken into consideration, they actually have less usable capacity.
Example.
Most of vehicles low DC side electronics will not tolerate voltage operating range of LFP , especially on the low side of voltage curve.
Onboard DC-DC converter has ability to provide 15.1V that is way above safe limit for LFP chemistry top voltage curve.
Self heating battery will actually trigger ICCU to believe that battery is experiencing erratic behavior and will suspended maintaining battery when stationary.
Ohmmu BMS has no ability to report to the ICCU if suddenly for some reason Ohmmu BMS stop charging or discharging.
This scenarios are quite dangerous if vehicle is in motion.
And the whole purpose of Ohmmu BMS is to use this BMS options to protect cells from over charging, cells imbalance.
And this the reason if 12V battery has BMS it should be slave to onboard DC-DC converter and vehicle should be designed to accept this type of battery design.
If Ohmmu battery BMS suddenly decided to stop charging while ICCU DC-DC converter is active can cause other low DC side electronics to fail.
Then there electric noise that DC-DC converter is producing and 12V lead-acid chemistry that has no BMS will always be in place to buffer this and prevent from reaching other electronics on low DC side.
So if you are interested in more detail or learning let me know.

I get what you're saying. The issue I guess is you're assuming either the Ohmmu BMS will fail, or it's parameters are set to allow it to simply stop charging or discharging randomly, neither of which I've seen reported. Ohmmu has said the safety parameters are set at fairly extreme values which wouldn't be hit during any normal usage situation.

I am not an engineer and have only a basic understanding here. I can only go based on information I've found, info provided from the company, your information, and my personal experiences along with many others.

One thing I will say, they do have a sodium version of the battery coming out in the future that won't use a BMS which seems like it would address most, if not all, of your concerns.

 

[ltcoljohnnyd]

Have you had any more problems with your. Ev6 12 volt battery since replacing it with the ohmmu?

 

[wd1]

I have both a Sodium Ion battery and the OHMMU Li battery. Both batteries seem to work perfectly along with the new updates for the ICCU. I have had both in the car recently and have had ZERO issues. In fact with the Sodium battery the car's 12v system seems to recharge the battery every few hours with no problem, keeping it at a steady 14 volts at rest. I also have a small device which powers my T-Box UHD from the USB-C power port only when the car is actually powered on in drive mode. The data still is bidirectional from the USB-A port.

When installing the OHMMU Li battery the app has an update for the BMS specifically for the EV-6. It is found on the last page of the App at the bottom. It works via bluetooth and will update the battery to the EV-6 BMS for that battery.

 

[Doobiewah]

I have both a Sodium Ion battery and the OHMMU Li battery. Both batteries seem to work perfectly along with the new updates for the ICCU. I have had both in the car recently and have had ZERO issues. In fact with the Sodium battery the car's 12v system seems to recharge the battery every few hours with no problem, keeping it at a steady 14 volts at rest. I also have a small device which powers my T-Box UHD from the USB-C power port only when the car is actually powered on in drive mode. The data still is bidirectional from the USB-A port.

When installing the OHMMU Li battery the app has an update for the BMS specifically for the EV-6. It is found on the last page of the App at the bottom. It works via bluetooth and will update the battery to the EV-6 BMS for that battery.

@wd1: Just want to add to your comment about the BMS, per Ohmmu from an email that I sent to them, for the app to properly update you need to have a very strong WiFi signal along with having a strong signal for bluetooth, so they recommended that you have the phone as close as possible to the battery when doing the update. I updated and it showed EV6 for the firmware. Another time, it was blank (this happened a few times, where it showed at times and not at others). They indicated that the firmware would still be on 'EV6' even if it wasn't showing at times and that it definitely needed the same strong WiFi and closeness to the battery to ensure it showed up. They also forwarded this minor issue to their BMS developer to see if there was a solution.

 

[TechnicallyJeff]

Have you had any more problems with your. Ev6 12 volt battery since replacing it with the ohmmu?

No issues whatsoever in my previous EV6 or in my new one.

 

[Doobiewah]

No issues whatsoever in my previous EV6 or in my new one.

Mine has worked flawlessly and I owe you thanks for your recommendation and install video. I feel confident having that battery on board.