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Not sure if they used all these ideas but regen is better in the cold now.

Description

In cold weather, make the car more efficient and perform consistently by using regen power more efficiently.

In cold weather (eg: less than about 40F, 5C), the battery can’t accept the high currents of normal regen.  Currently, this is addressed by making regen weaker depending on the battery temperature.  This makes the regen-braking force inconsistent and makes me use my brakes more (wasted energy).

When using regen braking, the power could optionally be used to heat the cabin.  Any power beyond the heating capability (limited by the power of the heater or suitable temperature-deviation from the user-set temperature) could be used to charge the battery.  If there is still power beyond that, it could go towards heating the battery up to temperature.  If all those uses are exceeded, only then would regen be limited.

Competitive/Pricing/Notes

Full-regen is about 70-50 kW.  The heater is about 4-6 kW, and the battery heater (ie motor-heating) is about 4-6 kW (only in the S/X, no battery heater in the 3) (note that while there is technically no actual battery heater for the 3, they send specially designed, inefficient pulses of power to the motor to heat the motor which is thermally connected to the battery; this is thus the equivalent of a ~4KW heater).  This may be only an incremental improvement but may increase range slightly, make the battery more efficient, and make regen more consistent.

Moderator:  Extending this idea a bit further, seats without passengers could have the seat heaters turned briefly on during deacceleration to consume a bit more power.

Status

Unknown.

(lightly edited by moderator)

 rating;;3,3,4,0

0 comment

Description

Currently, if the heater is off and you turn on the front window defroster, the defroster works quite quickly.  When turning off the defroster, the heater is set on.  In this case one must then turn the heater off again.

Instead, the heater should be returned to the selected state that preceded the defroster use.

Competitive/Pricing/Notes

Moderator: It may be considered a feature that the heater is set on after defrost – i.e. less button presses for the most common operation.  Few owners turn off heat in cold weather and just leave auto-temp on.

Status

Unknown.

(lightly edited by moderator)

rating;;2,2,4,0

rating;;3,3,4,0

0 comment

Description

Make heat in steering wheel (winter package) adjustable in steps like the seat heat. Today it is getting very hot fast and you have to turn it off even though some heat would be nice.

Competitive/Pricing/Notes

All other passenger heating options are adjustable.

Status

Unknown.

(lightly edited by moderator)

rating;;3,2,4,0

rating;;3,3,4,0

0 comment

Cold Weather Options from App

by MR

Description

Add controls to the app to turn on various HVAC and cold weather options such as heated seats, windshield defrost, wiper heater, rear windshield defrost, steering wheel heat, etc.

Competitive/Pricing/Notes

Would be nice in the midwest to be able to preheat all the cold weather package items before getting into Model S

Status

Unknown.

(edited by moderator)

rating;;3,3,4,0

rating;;3,3,4,0

0 comment

Description

Heat the the front radar to keep it free of snow or ice in cold conditions.

Competitive/Pricing/Notes

If  you have snow or ice build up on the radar, it may prevent it from working.

Status

Unknown.

(lightly edited by moderator)

rating;;3,2,3,0

rating;;3,3,4,0

0 comment

Description

Have an option to automatically crack the windows and/or sunroof if the car interior exceeds a high temperature threshold.

Competitive/Pricing/Notes

The windows could close automatically if the car detects rain. This would be great for the interior, keep the  temperature down without the need to run the fan and/or ac.

Moderator: This may have a small safety and security issue.

Status

Version 8.0 added a new feature to automatically run the HVAC if inside temperatures exceed 105 degrees. While not identical to the requested feature, but accomplishes a similar goal of keeping the car from getting too hot.

(lightly edited by moderator)

rating;;2,4,4,1

 

0 comment

Heat Pump to Improve Range

by Thom EM

Description

Use a HVAC heat pump for heat and cooling for improved range, especially in cold weather. The Heat pump is more efficient than a resistive heater currently used.

Competitive/Pricing/Notes

It is wasteful to use electric resistance heat, when the same electricity put into a heat pump can move about four times as much heat into the car. Electric energy is much more valuable than combustion energy, as we know from the fact that electric motors are several times more efficient than combustion engines. For the very same reason that EVs are a great idea, use of electric energy to resistively heat them is a terrible idea.

Reversible heat pumps are standard practice in home HVAC systems, and now offered in some EVs, such as the current generation Nissan Leaf.

Heat Pumps will add cost, and it should be pointed out that a resistive heater is still required, as heat pumps efficiency drops as the temperature gets colder, and stop working at about 0 degrees F.  Tesla does take waste heat from the battery and motor operation to help heat the cabin.

Status

Unknown.

(lightly edited by moderator)

rating;;2,2,3,0

0 comment

Description

Create a phone/app/car setting that activates battery warm up, regardless of internal temperature setting,  prior to starting a trip.  This startup could be for a number of minutes, or as a countdown to anticipated departure time. Currently I don’t believe cabin temperature initiation will bring the battery up to temperature sufficiently.  This energy-burning activity would be ‘less costly’ if it could be effected prior to unplugging from the wired source.  Secondly, it may be advantageous (Safer?) if this same capability were available even when not plugged in…prior to starting wintry trips, even with its significant hit to range.

Competitive/Pricing/Notes

None.

Status

When climate control is on (remotely or locally) and power is available from the charging connection, the battery will be heated if needed. Added with v5.9 software.

rating;;4,4,4,1

0 comment

Description

Via the remote app, allow defrosting control as well as wiper heaters (Winter package option).

Competitive/Pricing/Notes

None.

Status

Implemented with V10 (Oct-2019).

(Simplified by Moderator)

rating;;3,4,4,1

0 comment

Description

When using the Tesla remote phone app to control the HVAC it currently can override previous settings and works even if the car is in motion. Two suggestions:

1) If the remote HVAC is used to turn off the HVAC, when entering the car, the car should resume the last non-off settings. For example, set the car temp to 72 degrees for 5 minutes with the remote. Then turn it off remotely. Get into the car 10 minutes later, and it should resume at the 72 degree settings (not remain off as it currently does). Think of the remote HVAC control as a temporary override until you get into the car.

2) Remote HVAC settings change should be ignored if the car is not in Park (very minor).

Rewritten above by Admin for clarity. Original wording:
When you utilize the remote control from your phone, and you turn off the environmental controls, it should signal the transition in the MODE the car is in at that moment. If the car is locked (no user nearby) then the enable or disable of the environmental control is contextual to that locked state – same if you remotely adjust it when someone is driving (but frankly I don’t see why remote control is allowed in that case). This contextual reference method would fix an interesting error currently seen: turn on the HVAC remotely, then later turn it off – when you get back in the car the HVAC is off for normal operation – which is wrong.

Competitive/Pricing/Notes

We’re not aware of any vendor that offers this feature.

Status

Unknown.

rating;;3,2,4,0

 

rating;;3,3,3,0

0 comment