Am I the only engineer who noticed the disappearance of the actual battery volts and amps during supercharging a few years ago? There's plenty of room on the screens to give us everything: volts, amps, kilowatts, accumulated kilowatt hours, accumulated fake, er, rated miles, rated miles per hour, etc. During all charging, not just supercharging.
Software wishlist
- Thread starter lklundin
- Start date
Speaking of technical data during charging, one important piece of engineering information accumulated internally by every electric car with a high voltage battery pack (i.e., every electric and hybrid car) is a list of individual module voltages. It's critical that they're matched, because charging must stop when any one module voltage reaches its safe upper limit and the whole system must shut down when any one module reaches its lower safe limit.
in a healthy battery pack, these voltages will closely track. If they diverge, it probably means that one or more cells in a module has failed. Either it has failed open-circuit, or it has shorted and blown the fuse bond wire connecting it to the module bus. A failed cell effectively takes out one cell in every other module because the amp-hour capacity of the whole pack is limited to the capacity of the weakest module.
Naturally it would also be very nice to see the raw output of the charge integrator that monitors the amp-hour state of the entire pack. It resets to zero when you charge the car to 100% and goes negative as you discharge. This would tell you what the pack is really doing as it ages, especially as the pack reaches full depletion. (Admittedly, this is something I never do. I'm one of those guys who, on road trips, stops at more superchargers than he has to, and works hard to keep the state of charge above 20%.)
Anybody know if this data is already available through the diag port? It must be one of the first things the service techs check during routine service. C'mon Tesla, give us some useful easter eggs!
in a healthy battery pack, these voltages will closely track. If they diverge, it probably means that one or more cells in a module has failed. Either it has failed open-circuit, or it has shorted and blown the fuse bond wire connecting it to the module bus. A failed cell effectively takes out one cell in every other module because the amp-hour capacity of the whole pack is limited to the capacity of the weakest module.
Naturally it would also be very nice to see the raw output of the charge integrator that monitors the amp-hour state of the entire pack. It resets to zero when you charge the car to 100% and goes negative as you discharge. This would tell you what the pack is really doing as it ages, especially as the pack reaches full depletion. (Admittedly, this is something I never do. I'm one of those guys who, on road trips, stops at more superchargers than he has to, and works hard to keep the state of charge above 20%.)
Anybody know if this data is already available through the diag port? It must be one of the first things the service techs check during routine service. C'mon Tesla, give us some useful easter eggs!
Last edited:
UrsS
Member
There is probably more information than you bargained for here. But if you read through the posts you will find how to get all the info you want from your car:
Model S: Battery & Charging
UrsS
Member
Here you can find instructions on how to get all the battery information on your car. Lots of useful info on battery life etc. Also lots of rants about Tesla's communication.
Sudden Loss Of Range With 2019.16.x Software
Sudden Loss Of Range With 2019.16.x Software
Similar threads
