Max Battery Power setting in P90DL

[apacheguy]

This is the exact opposite of a system I recently proposed to optimize SpC rates if and when they increase to 150 kW:

Supercharging: Chill Mode

 

[sorka]

There's a rumour floating around that the P85D takes 2.9s to get to 60 instead of the 2.8 of the P90D and that's because the cell impedance is lower in the new cells so the voltage drop under high load is less, meaning that you can get more power out of the pack at a given current level.

This development would seem to fit in well with that.

It would also suggest that the P85D won't get this max battery power setting.

That was a rumor. Also additives like silicon that increase how many Lithium Ions that anode can absorb tend to increase impedance. The price for increased capacity is often decreased maximum current. So if they didn't manage to increase the impedance of the new cells with Silicon, they must have discovered something revolutionary to get around it which is quite possible.

 

[Ingineer]

It's probably using the electric pack heater to raise the temp. Pete90D reported he heard the "whine" while stationary. This noise is the glycol loop pumps ramping up to high. Sometimes during a reboot you can hear the same thing happen if the car was/is charging.

 

[Matias]

It would be nice to know, what is pack's spesific heat capacity. Was the electric heater 4.5kW? I think it will take several minutes to heat the pack if it is cold.

 

[Kalud]

Very cool new feature. I found out the same behavior myself with my P85 from 2013. When I was having a warm pack, right after Supercharging for example, I was logging much higher, often more that 470hp (from KW conversion) with the REST api.

One example I have here is 357kW (479hp). Otherwise with a battery at "room" temperature, I usually cannot see more than 337kW (452hp).

I'd like to get that max battery power mode in the P85! Please Tesla!

 

[Pete90D]

It would be nice to know, what is pack's spesific heat capacity. Was the electric heater 4.5kW? I think it will take several minutes to heat the pack if it is cold.

Yesterday afternoon when I charged it was 72F outside, and it took about 10 miles of driving before it was "Ready". Last night when I drove it was 65F and it took only a few miles. So I'm baffled by this max power option, when to have it on, when to have it off...

 

[djp]

The Roadster also has a Performance charge mode that holds the pack at a higher temperature to improve 0-60 times, but with a trade-off in increased wear on the cells.

 

[Pete90D]

Interesting. Would this be covered under warranty for a battery replacement if it degraded quickly?

 

[djp]

Interesting. Would this be covered under warranty for a battery replacement if it degraded quickly?

No, the warranty doesn't cover degradation from regular use. The battery is treated as a wear and tear item under the warranty, similar to tires.

 

[yobigd20]

Might be a feature for the P85 with Ludicrous Upgrades, can't wait to figure it out

you mean the original P85's ??

 

[okashira]

- - - Updated - - -

It will be interesting to see how these cells test out once some folks get their hands on some bare ones...

They are surely Sanyo NCR18650GA, which have been available for about 6 months, and lots of data out there already. Great cells

 

[Matias]

So if you change 85 kWh pack cells to those cells do you get 90 kWh or more or less?

Ps.How about testing those 85 kWh pack cells with 100mA dicharge? You were planning that.

- - - Updated - - -

https://www.fasttech.com/product/2399300-authentic-sanyo-ncr18650ga-3-6v-3500mah

According to this test it would give almost exatly 90 kWh.

 

[Ingineer]

I doubt Tesla would switch suppliers unless it's just a stop-gap until the Gigafactory is online.

 

[Matias]

I doubt Tesla would switch suppliers unless it's just a stop-gap until the Gigafactory is online.

Sanyo is subsidiary of Panasonic

https://en.wikipedia.org/wiki/Sanyo


- - - Updated - - -

If 90 kWh pack cells are Sanyo NCR18650GA, that would make pack capacity 90 kWh with 1 amp cell disharge

see https://www.fasttech.com/product/2399300-authentic-sanyo-ncr18650ga-3-6v-3500mah

On the other hand 85 Kwh pack has more like 81 kWh capacity with 1 amp cell disharge

see http://www.teslamotorsclub.com/showthread.php/45063-Tesla-Model-S-18650-Cell-Test-Data

So difference is almost 9 kWhs?

 

[AmpedRealtor]

So basically now the P90DL has a "launch mode"? lol

 

[apacheguy]

The Roadster also has a Performance charge mode that holds the pack at a higher temperature to improve 0-60 times, but with a trade-off in increased wear on the cells.

Yeah, I was thinking about this. From a performance standpoint the cells may "love the heat" but certainly not from a degradation standpoint.

 

[Kbra]

Am i the only one not seeing the "L" at the end of P90D badge on the car?

 

[jpet]

Am i the only one not seeing the "L" at the end of P90D badge on the car?

Instead of adding an L, Tesla has opted to underline the P90D.

 

[mgboyes]

Am i the only one not seeing the "L" at the end of P90D badge on the car?

P90DL is just terminology invented on here to differentiate the ludicrous version. It's not an official Tesla name.

 

[Ingineer]

Sanyo is subsidiary of Panasonic

Wow, I did not know this. Thanks!