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Description

Currently, when charging in cold weather, the charging screen shows the power going into the battery, but does not show the power going into heating the battery.  In very cold weather, the power going into the battery can be at or near zero.  It can be interpreted that the charger is not working properly.

At a minimum, a person should know that the battery is being warmed up to be able to charge faster and to wait for 5-10 minutes or whatever for charging to achieve a normal speed.

Competitive/Pricing/Notes

None.

Status

Unknown.

(lightly edited by moderator)

rating;;3,2,4,0

rating;;3,3,4,0

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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

When it is very cold, the Supercharger cable becomes stiff from the cold and is hard to maneuver into a charge port. Suggest adding a heating wire into the Supercharger cable, and turning it on when a Model S gets near to the cable. This could make the cable more flexible and easier to manage.

Competitive/Pricing/Notes

Suggested by Opafiets in the Tesla Motors forum.

Status

A new thin liquid cooled/heated Supercharger cable was released in June-2015 at the Mountain View, CA Supercharger. New Superchargers will get this new design.

rating;;3,4,4,1

0 comment