Friday , February 26 2021

With the electronic car well heated by winter



Munich.

Electric car drivers are used a lot. One of the favorite jokes about the competition Verbrenner is that the electronic car driver in the winter always have a hat and gloves in the car have, because the oven is eating too much power.
By Claudius Lauder, DPA

Volker Blandov of Good Secret considers this excessive excessive: "For the first generation vehicles that was partly a problem." However, today's battery size make it easier to heat the car. "

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Warm up the car through the app

In addition, it is often also a question of the correct default. So most e-cars can be pre-installed through applications already. "In this case, the vehicle's battery is also preheated to optimize power, braking and charging behavior," explains Blandow.

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BMW also recommends this form of precondition to its car customers. "If the vehicle is connected to a charging station or even only to a 230-volt charging cable, the energy needed comes from the network," says Paloma Bronkhurst of BMW. "The range is therefore not burdened by heating the interior."

Limited range in winter

It is undisputed, however, that mail cars in the cold season with lower ranges to calculate. "This is partly because of the energy needed for heating, in addition, the cold also has an impact on the conductivity within the battery," says Blandow.

For example, if an oven with a capacity of 5 kW is installed and vehicle consumption is typically 15 kW per 100 km, the driver should calculate with a loss range of about 30%.

Optimal energy consumption

But BMW, Tesla and other manufacturers are equipped with their electric cars with different driving modes that can also minimize the effects of low temperatures. In this case, for example, heating power is reduced and distribution power optimization. Blandow advises to use a far more efficient steering wheel seat heating while driving. "If you use both, you can definitely lower the temperature within three or four degrees without losing much of your comfort."

Another way to reduce power consumption is through a heat pump. "It uses the internal heat of the high-voltage battery and the electric motor to control the temperature of the interior, and the interaction between the electric heating and the heat pump system is completely automated," explains Bronkhoerst. According to BMW, the electric range compared to a car without a heat pump in heating mode can be increased by 30 percent.

Charging the battery takes longer in the cold

"Anyone who tries to charge an electric car is very cold and can wonder how long it can take," says Blandow. Double times load times are not uncommon. That the chemical reactions within a lithium ion battery need it hot.

This effect is particularly obvious when an electric car is almost empty and parked outside at very low temperatures. The voltage of the battery can thus further sink below the critical limit. Protect the battery then ensure that the charging current is abgeregelt. "The car can only move in turtle mode," Blando warns.

Sets charging cycles with a timer

Recommended: Set the charge time using the charging timer. If you want to get out in the morning car, the best thing to do is to load the car into the morning hours. The effect has a cold battery on recovery, and therefore energy recovery during braking. "With a car cooled, it does not work as efficiently with one pre-air conditioner," explains Brunckhorst.

However, it does not change the driving behavior. Once the battery is at operating temperature after several kilometers, full energy recovery is available again.

No one should worry about freezing battery systems. This is ensured by different insulation systems. According to Tesla, the batteries of US cars are surrounded by liquid, which ensures that no overheating or hypothermia can occur.The fact that the Californian manufacturer sells most of the cars in Europe in Norway and Denmark may be another indication of winter adjustment.

In the winter, electric drivers have to say goodbye to their usual range usually prior to the charging station. Photo: Andrea Worenz

In the winter, electric drivers have to say goodbye to their usual range usually prior to the charging station. Photo: Andrea Worenz
Photo: Andrea Warnz

Electronic vehicle drivers should be calculated in the winter with shorter ranges than in the summer. Photo: Wilfrid Wolf

Electronic vehicle drivers should be calculated in the winter with shorter ranges than in the summer. Photo: Wilfrid Wolf
Photo: Wolf Wolf

Volker Blandow is the head of the Department of Smart Mobility. Photo: TÜV SÜD AG

Volker Blandow is the head of the Department of Smart Mobility. Photo: TÜV SÜD AG
Photo: TÜV SÜD AG

Often, electronic cars like the BMW I3 (front) can not only be charged but also warm up in advance before the journey begins. This can minimize the power requirement for heating when traveling. Photo: BMW

Often, electronic cars like the BMW I3 (front) can not only be charged but also warm up in advance before the journey begins. This can minimize the power requirement for heating when traveling. Photo: BMW
Photo: BMW

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