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Electric car battery: 6 mistakes to avoid to preserve it

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September 21, 2024



Like a smartphone's battery, the health of your EV car's battery can quickly deteriorate if you're not careful. To maintain satisfactory battery performance over a longer period of time, it is necessary to adopt good charging and driving habits. Chargemap explains the 6 simple mistakes you should avoid to drive even longer and further with your electric car battery.

Mistake No. 1: Keeping the battery level low for too long

This first point forms the basis for good charging habits for your electric car battery. The ideal for daily use is a battery charge level between 20 and 80%.

If you regularly drop your battery to a very low level (below 5%) and do not charge it, it will accelerate its aging process.

Of course, there are cases where you are forced to stay within this range. For example, if you Charging your electric car to 95% just before a long journey and plugging it back in at your destination with less than 10% won't cause any major damage. As long as this happens selectively and, above all, as long as the electric car battery remains at these extreme values for a short time, you can afford it without any problems.


Mistake No. 2: Letting your e-car stand still for too long

During the first lockdown, we published an article describing how you can take care of your e-car and its battery during forced immobilization. The most important point to remember remains the same: an electric vehicle must be driven very regularly so as not to contribute to the premature aging of the battery.

If you don't drive it much, make sure you don't let it sit still for more than a month. To ensure the point raised above, you should stay within the range between 20 and 80% when parking for a long time, with the best value being between 50 and 75%.


Mistake No. 3: Fast charging too often

The possibility of using the Tesla Model 3, charging in the shortest possible time tempts you to want to benefit from it to the maximum. However, predominantly fast or ultra-fast charging is not desirable if you want to protect your electric car battery.

It is mainly a question of temperature. In order to achieve such a high charging power, a lot of heat is released, which can be harmful to the battery cells. If the vehicle is driven a lot and is mainly charged at fast-charging stations, the battery often overheats, which leads to an early reduction in performance.

It is therefore best to use slow to fast charging in everyday life and keep fast and ultra-fast charging for long journeys or emergencies. To find the right charging stations for your needs, remember to check the power filter in the Chargemap app .


Mistake No. 4: Showing nervous driving behavior

The battery of an electric car is designed for a certain number of charging cycles (one cycle = full charge and discharge). A lithium-ion battery lasts an average of 1000 to 1500 cycles. The more nervous you drive, the faster you need to recharge your vehicle. Of course, this shortens the service life of the battery.

Modern electric vehicles are equipped with devices that enable a more economical driving style. Driving in Eco mode is not only good for your battery, it's also a great way to save money because charging happens at longer intervals.

If you're a sporty rider, treat yourself to a little fun every now and then, but try anyway, mostly these principles of eco-driving Apply.


Mistake No. 5: Charging an electric car battery that has already been heated

One of the factors that affect the Charging time and performance of your vehicle is the temperature of the battery. Between 20 and 40°C, the battery can reach its maximum charging power.

Extreme heat (50-70°C) can be harmful to lithium-ion batteries. Just like fast charging, a lot of heat is generated in the batteries during long and sporty rides. When charging (especially fast charging), the battery can reach critical temperatures.

However, while this precaution applies to certain models such as the Nissan Leaf, some manufacturers are equipping their electric cars with high-performance battery temperature control systems. This is the case, for example, with Tesla models, which can handle temperature fluctuations very well. So, find out how your EV behaves in terms of cooling (or heating) the batteries.


Mistake No. 6: Park your electric car outdoors

This last point is not strictly speaking a "mistake". However, if you have a choice, it is better to park your e-car in a covered garage or underground car park.

In times of great heat, it is advisable not to expose your e-car to direct sunlight, if only because of the wear and tear of the vehicle itself. If the battery tends to heat up slightly and you have the time, you can also wait for the temperature of the battery to drop before plugging in the car.

Conversely, cold winter weather does not lead to premature battery wear, but prevents the cells from functioning optimally. For this reason, you can observe a decrease in the range of electric cars in the winter months. However, this does not cause the battery to deteriorate.

We hope these simple tips have helped you. If there's one thing you need to remember, it's that there's no universal magic formula that can prevent the battery in your EV from wearing out. Technological advances in battery technology help maximize battery life. However, good charging and driving habits will also help you to extend your journey with the electric car.

What do you do every day to save your electric car battery?

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