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Is Charging an Electric Vehicle After Use Every Day Harmful to the Battery?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.22
Electric vehicles are very convenient, so many people use them as a means of transportation. When using an electric vehicle, it is necessary to charge it frequently. Everyone has different charging habits. Some people charge it after use every day, while others wait for the electric vehicle to run out of battery before charging. Everyone knows that charging after running out of battery can cause harm to the battery. So, is "charging after use" harmful to the battery? Insiders will tell you the answer.


Some users charge the battery after using an electric vehicle every day and then return home, resulting in almost daily charging. Will charging the electric vehicle after use cause damage to the battery? Let's first take a look at the advantages and disadvantages of charging after use.

1.The advantages of "charging after use"

Charging after use can keep the battery fully charged, which can avoid the situation of insufficient battery power and loss of power. Therefore, charging after use also has advantages, mainly manifested in two aspects.

1. Avoid electric vehicles running out of power midway

After using an electric vehicle every day, charging it can quickly replenish the amount of electricity used, which can keep the battery fully charged and prevent the situation of forgetting to charge and being unable to ride the electric vehicle on the second day, as well as the problem of the electric vehicle running out of battery midway.

2. Prevent battery crystallization

As is well known, the process of charging and discharging electric vehicle batteries actually involves a chemical reaction. After the electric vehicle is discharged, the concentration of the electrolyte will decrease. If the battery is not charged for a long time, crystallization will occur at the two poles of the battery, which will affect the speed of the chemical reaction and reduce the battery capacity. If the battery is charged after use every day, it can prevent crystallization.

2.The disadvantage of "charging after use"

Although charging after use has a certain maintenance effect on the battery, charging after use also has its drawbacks, which can lead to the following three situations.

1. Accelerate battery aging

Batteries have a designed lifespan, which is generally calculated based on the number of charging and discharging cycles. If an electric vehicle is charged after each use and returned home, it will inevitably waste the number of charging and discharging cycles of the electric vehicle, which will accelerate battery aging and reduce battery service life.

2. In case of battery water shortage

As mentioned earlier, the charging and discharging process of a battery is a chemical reaction inside the battery. During charging or discharging, heat is generated, and the water in the electrolyte will evaporate. If used up, charging will accelerate the evaporation of water, which will also affect the battery's service life.

3. Damage to the charger

Although chargers are not as important as batteries, they also have a lifespan. If a charger is used frequently, the internal circuits will age. After increasing usage, unstable output current and inability to automatically cut off power may occur. In this case, it is necessary to replace the charger.

3.Can electric vehicles be charged immediately after use?

Above, we analyzed the advantages and disadvantages of charging after use. Can our electric vehicle be charged after use? Actually, this depends on the type of electric vehicle battery and actual usage.

Different types of batteries result in different charging methods

If your electric vehicle is a lead-acid battery, we do not recommend charging it after use because lead-acid batteries have a shorter lifespan. Charging it after use will inevitably shorten the usage time.

If your electric vehicle uses lithium or sodium batteries, charging them after use has little impact on the battery, especially sodium batteries, which can have a lifespan of up to 10 years. The lifespan of an electric vehicle is only 5-7 years, so there is no need to worry too much about the charging method.

Charge according to actual situation

In addition, we also need to charge according to the actual situation of the battery. For example, if your battery has a relatively small capacity and is used up on the first day, if it is not charged, it cannot be used normally on the second day, so it needs to be charged after use, otherwise it will affect travel.

If the battery capacity is not small or aging, and the battery is sufficient to last for more than two days, it is still advisable to reduce the number of charges as much as possible and keep the battery level at 20-30% before charging.
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