Ohmmu battery [question about ohmmu battery for Model 3LR]

[roddeitrich]

Has anyone ever been able to get the original Ohmmu battery to work on a Tesla Model 3 LR.

 

[Stanwood Steve]

I believe Mountain Pass Performance offers an alternative. I've had the Ohmmu version 2 installed in my 2018 Model 3 Performance for about a year or so, and never had an issue. Not sure why some have issues and some don't, but it's been absolutely trouble free for me. I replaced my OEM battery with about 45k miles on the car, and it now has 75,000 miles on it, with no error messages.

 

[voltaholic]

I checked into mountain pass. they are using a starting battery with lower capacity than the lead acid OEM.
I just found something from LithiumMoto. Anybody heard of them ?

 

[Flybyglass]

I checked into mountain pass. they are using a starting battery with lower capacity than the lead acid OEM.
I just found something from LithiumMoto. Anybody heard of them ?

Never heard of Lithium Moto. Sent a not to find out if they use a BMC internally. The Mountain Pass battery is based on an aviation battery.

 

[Flybyglass]

Never heard of Lithium Moto. Sent a not to find out if they use a BMC internally. The Mountain Pass battery is based on an aviation battery.

They use a BMC although no mention on the web page. I am skeptical.

 

[Islandcapture]

FYI I have this problem. Ordered in March, received in April. This will be my third time to reset the car (tomorrow). I emailed Ohmmu support so waiting for their reply. The car hasn't updated itself for weeks, but the other Tesla beside it has. I'll update my post in case someone still has this issue as well.

 

[dfwatt]

After being All Quiet on the Western Front so to speak, got my first battery needs replacement warning. Ran for four months roughly with a beta version 3 I think, so I'm tempted just to do a reset and see how long that goes. Was there another rewrite of the 12 volt sub system such that once again very high voltages are being pushed out from the pack? Feels like whack a mole. Have emailed Ohmmu but they are on Western time so probably won't hear back for a while.

 

[golfpilot]

I have inquired with Ingenext on possibly getting a setting that will ignore 12v alerts. With the ohmmu app and the blutooth enabled bms, I don't see why this would cause any issues.

 

[dfwatt]

I have inquired with Ingenext on possibly getting a setting that will ignore 12v alerts. With the ohmmu app and the blutooth enabled bms, I don't see why this would cause any issues.

Probably not a good idea. By ignoring alerts you have no warning that the 12 V sub system is draining your battery aggressively when it detects what it considers to be a terminal fault. This means you have no warning at all that your car is about to brick and become undrivable. The key is to intervene as soon as you get evidence for the battery suicide routine being activated.

 

[golfpilot]

Probably not a good idea. By ignoring alerts you have no warning that the 12 V sub system is draining your battery aggressively when it detects what it considers to be a terminal fault. This means you have no warning at all that your car is about to brick and become undrivable. The key is to intervene as soon as you get evidence for the battery suicide routine being activated.

isn't that the purpose of the blutooth bms system and ohmmu app?

 

[dfwatt]

isn't that the purpose of the blutooth bms system and ohmmu app?

The Bluetooth app on the battery just allows you to disconnect it and monitor its charging and discharging. I'm not aware that it can alert you (at least I haven't figured out how to do this) in the context of the car's 12 V subsystem aggressively discharging the battery. Bluetooth Protocols are also ultra short range. I can't even communicate with the battery 20' away.The Tesla app on the other hand gives you Immediate warning when it starts the suicide routine. Even if you're miles from the car as long as you have either Wi-Fi or cellular connection For both the car and the phone.

 

[voltaholic]

The Mod 3 and Y 12V lithium bugaboo certainly is vexing. Looks like LithiumMoto.com/tesla-12v-battery is currently looking for "testers" to try out a new lithium workaround.

 

[Flybyglass]

The Mod 3 and Y 12V lithium bugaboo certainly is vexing. Looks like LithiumMoto.com/tesla-12v-battery is currently looking for "testers" to try out a new lithium workaround.

That must be what they meant by "Clinical Trials"

 

[Scrutmonkey]

2018 LR with Ohmmu from March 2022…emailed Ohmmu twice…no response.

I’m tempted to try reinstalling it again and see how far till the error pops up. Last time it was 1.5 days. Anyone here get a module from them yet?

Edit: sorry, found a big thread on the charging section, might check that out as well.

Longer term Ohmmu experiences?

I went through 19 successful Cycles of the v4+ battery until this morning when I got a message that my 12v system needs to be replaced. Went out to the car to try that Tow mode reset but the message on the left side was saying there wasn't enough power to support the 12v electrical system...

teslamotorsclub.com

 

[Flybyglass]

2018 LR with Ohmmu from March 2022…emailed Ohmmu twice…no response.

I’m tempted to try reinstalling it again and see how far till the error pops up. Last time it was 1.5 days. Anyone here get a module from them yet?

Edit: sorry, found a big thread on the charging section, might check that out as well.

Longer term Ohmmu experiences?

I went through 19 successful Cycles of the v4+ battery until this morning when I got a message that my 12v system needs to be replaced. Went out to the car to try that Tow mode reset but the message on the left side was saying there wasn't enough power to support the 12v electrical system...

teslamotorsclub.com

They are now issuing the V4+ with bluetooth. Contact them for warranty.