Why should not fully charge electric car battery?
Experts say that car batteries have the best performance and lifespan when charged at 20-80%, and the charging time from 80% to 100% is quite long.
Therefore, experts advise unplugging the electric vehicle's battery charger when it reaches 80% battery.
Whether it’s a phone, laptop, or electric car battery, charging it to 100% will have a negative impact on the battery. Regularly charging the battery to 100% will cause the battery’s maximum kilowatt-hour storage capacity to decrease faster than normal.
That is also the reason why car manufacturers always focus on developing battery management software. This software allows users to easily set the maximum charge level for each charging lane.
However, when the car battery is completely discharged to 0%, it will put the battery at risk, and the car battery may even be damaged or worn out.
Experts cite that in a normal cycle, the sulfation process will accumulate lead crystals on the surface of the battery's lead plates. However, this accumulation is only temporary and will be reversed when the battery is recharged. If the battery is completely discharged to 0%, the lead sulfate crystals will crystallize and adhere to the surface of the battery, causing the battery to lose its energy storage capacity more quickly.
Fortunately, today's batteries are designed to maintain a buffer level of 5% to 10%. This means that when you look at the notification on the battery screen that the battery is 0%, the battery is actually not completely drained.
To increase battery life, it is best to maintain the initial charge level between 20% and 80%. This charge level both maintains the battery's operating state and ensures the vehicle's driving range.
When charging an electric vehicle, whether using a household outlet or a fast charging station, the charging capacity will decrease significantly when the battery is about 80% full. Above this battery capacity, the charging will automatically switch to a slow charging state to prevent the battery from overheating and affecting its lifespan. Therefore, the charging time from 20% to 80% can be faster than from 80% to 100%.
To keep your car battery in good working condition, remember the following 4 principles:
Charge at 20% to 80%
Avoid charging the battery to 100%
Avoid letting the battery drain to 0%
Maintain discharge depth below 50%
