Renault ZOE confidential #3 cold weather tests Renault com …

22 Мар 2014 | Author: | Комментарии к записи Renault ZOE confidential #3 cold weather tests Renault com … отключены
Renault Zoe Electric Cars

Electric vehicle particularities

As you probably know, an electric vehicle doesn’t react the  same way to cold as an internal-combustion vehicle. Renault ZOE doesn’t use oil or gas, so our engineers don’t have to monitor these items. But other Renault ZOE components required particular attention during cold weather testing.

First of all, we had to examine how cold weather conditions affect the battery . notably in terms of:

Capacity . a very cold battery doesn’t fully charge. It can be compared to a fuel tank that contracts in the cold. The result is, of course, reduced range.

  Power . a cold battery cannot provide all the power required by the motor, reflected in weaker acceleration.

Charge . an overly cold battery cannot be charged too fast, making for longer quick charging times. Cold, however, has no impact on standard charging, via a Wall-Box.

We also had to check the charging system :


The charging socket has to remain accessible (flap not blocked in freezing weather)

The cable has to be flexible enough to be rolled up at any time

The cable must not remain blocked in the socket.

Our first conclusions on Renault ZOE s results:  At -25°C,  Renault ZOE is fully functional and drops in performance are almost unnoticeable. The battery performs very well in cold conditions from this point of view.

More noticeable in cold conditions is reduced range, but Renault ZOE remains one of the best mass-produced electric vehicles in this respect, thanks in particular to its reversible heat pump . which reduces heating consumption in cold weather and generates approximately 2kW of cooling or 3kW of heat with just 1kW of electricity.

Renault ZOE scores top marks!

Renault ZOE performs strongly, especially compared with internal-combustion cars, on the following points:

motor start-up: exactly the same at -30°C as in temperate weather, i.e. immediately and silently. No engine warm-up, no smoke plumes, no clatter.

first runs: the motor is not affected by the cold. Motorists can drive off straight away and floor the accelerator without having to warm the car up. Also, while in motion, the battery heats up and gradually improves the points mentioned above.

heating: on top of being frugal, the heat pump provides heat fast. The car doesn’t need to be started several minutes beforehand.

pre-conditioning system: to heat the cabin up a little and defrost the windows before taking off, drivers simply pre-program the heating and the car is at “room temperature” when they get in. This will never be possible with a combustion vehicle, where the engine needs to be turned on.

Our engineers were pleasantly surprised by Renault ZOE – by the fast-action heat pump, by the strong performance of the battery on power in cold conditions and its ability to start the motor at very low temperatures, and by the car’s road holding, especially grip on slippery surfaces . The battery’s central and low position is a big advantage here.

Renault Zoe Electric Cars

Many thanks to Fabrice Izzillo, features engineer for Renault’s electric vehicle range, for all this information.

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Comments

Sounds good but if everything is going to plan why isn t car on sale in UK yet?

Hello Nick, I m afraid we can t share that information, as it is confidential. Thanks for your interest,

The Renault blog team

What is the range you can expect approximately at full charge and cold start at 0 degrees Celsius and at -15 degrees Celsius?

I like the heat pump concept in EV. sounds very impressive what it the performance like in cold climates?

What ambient air temperature is needed to achieve the stated CoP of 3 and how does this deteriorate as the ambient air temperature drops below 0 degree C?

Are there any issues with the performance of the system due to the external evaporator icing up?

Renault Zoe Electric Cars
Renault Zoe Electric Cars
Renault Zoe Electric Cars
Renault Zoe Electric Cars
Renault Zoe Electric Cars

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