Lifetime Average Wh/mi

[sorka]

I have just over 150,000 on my 2016 90D. I have averaged 287 Wh/mile. My battery has started to show signs of problems over the last few weeks but nothing that has stranded me yet. The battery held about 80 kWh for the last 5 years or so and in the last month it has dropped below 70 kWh. Not sure if it means anything.

What does SMT show for mv module difference at say a lowish 25% soc?

 

[electronhauler]

What does SMT show for mv module difference at say a lowish 25% soc?

I don't have SMT.. I watched TeslaBjorn using it on his YouTube channel but haven't got it yet.. I don't have an android device but I'll check again to see if it is available on iOS

 

[electronhauler]

I don't have SMT.. I watched TeslaBjorn using it on his YouTube channel but haven't got it yet.. I don't have an android device but I'll check again to see if it is available on iOS

I see it is now available for iOS.. I'll post an update after scanning maybe next week.

 

[electronhauler]

I haven't seen the MCU's, but this is an educated guess. The MCU has what is essentially a hard drive storage on it. It's not a spinning disk, but is an SSD technology. I expect that the early versions of the MCU had this storage soldered onto the MCU motherboard and removing it would run the risk of damage.

I would not be surprised if they changed this to a removable storage. Possibly even going with a commercially available SSD mounted on the MCU board. The processor for MCU 1 was an Nvidia processor and all the processors post MCU 1 are Intel and probably similar to one another if not the same. Popping a removable SSD off the old MCU and placing it on the new one would be easy to do in that case.

But changing processors, even if the SSD could be easily moved would require a fair bit of work replacing the drivers for the different processor and there may be other code issues that would take someone with a fair bit of computing skills to fix. So it's simpler just to tell people upgrading from MCU 1 that they will lose all their information and settings, but other upgrades can be done without losing data.

I don't know for sure, but this is my guess from being an Electronic Engineer and having built PCs since 1987. I'm just making some guesses about how the black box works.

MCU2 uses soldered eMMC memory too. My MCU1 failed and was replaced with a 'refurbished' MCU1 without charge. However the refurb was so slow as to be impractical. Sometimes the navigation would take 20 minutes to compute a route!. I stumped up for an MCU2 replacement so Tesla got the money anyway.

 

[electronhauler]

What does SMT show for mv module difference at say a lowish 25% soc?

I got SMT and it shows a 12 mV difference at 17% SOC

 

[sorka]

I got SMT and it shows a 12 mV difference at 17% SOC

Not bad. Can you post a screen shot?

 

[electronhauler]

I posted it under the “CAC is king” thread.

Vendor - CAC is King

Invariably when discussion turns to a failing battery pack, the topic of module swapping comes up, so we thought it would be a good time to talk about CAC - Calculated Average Capacity - and why it's important. In fact, if your talking to a shop about pack replacement/repair and they’re unable...

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