Lithium-ion battery charging methods and techniques for electric vehicles. The correct way to charge a lithium-ion battery in an electric vehicle is to use a compatible charger and charge for one hour. Lithium-ion batteries have no memory effect and can be charged at any time. Many customers contact us through our website or by phone to inquire about the correct charging methods and detailed charging process for lithium-ion batteries in electric vehicles. Today, we will explain it in detail.
Lithium-ion battery electric vehicle charging methods and techniques
With advancements in lithium battery technology and reductions in production costs, lithium-ion electric vehicles, powered by lithium-ion batteries, have become commonplace in ordinary households. However, as lithium-ion batteries for electric vehicles gradually become more prevalent in the market, many people are unaware of the correct charging methods for these batteries.
1. Lithium-ion battery electric vehicles do not require special activation methods; the lithium-ion battery will activate naturally while the electric vehicle is in motion.
2. Charge according to the standard time and procedure, even for the first three times.
3. If a low battery warning appears while driving an electric vehicle, it should be charged as soon as possible. Lithium-ion batteries begin the sulfation process after discharge, and noticeable sulfation appears after about 12 hours.
4. Always use a compatible lithium-ion battery charger. First, insert the charger's output plug into the corresponding battery charging socket, then insert the charger plug into a mains power outlet. Observe the indicator light to determine if the battery is charging. If the charger is lost or damaged, please contact the corresponding dealer to purchase a replacement.
5. For lithium-ion battery packs, try to charge them as needed to prevent the battery from being under-voltage every time before charging. This can greatly improve battery life and keep the battery in a shallow cycle state, thus extending the battery's lifespan.
Methods for the first charging of lithium-ion battery electric vehicles
◆Since the lithium-ion batteries of electric vehicles sold on the market are already fully charged, the first charging time for a new lithium-ion battery should be 1-2 hours after the charger indicator light goes off. In summer, the charging time can be shortened appropriately, and it is not advisable to charge for an extended period after the light goes off.
◆The best time to charge is when the battery level reaches about 70%. In summer, after the charging indicator turns green, float charge for 1-2 hours. In winter, after the charging indicator turns green, you can extend the float charging time by about 2 hours. In particularly cold northern regions, try to bring the lithium-ion battery indoors to charge.
◆The initial charging time for a lithium-ion battery in an electric vehicle: Since the battery has not undergone charging and discharging before leaving the factory, it's important to ensure its normal operation. Generally, a charging time of about 5-6 hours is sufficient to fully charge the battery. Subsequent uses can be charged for slightly longer periods.
◆When charging a lithium-ion battery for the first time, the charger may heat up very quickly and intensely. Therefore, especially in summer, do not place the charger on objects that are prone to heat and combustion, and it is best not to place it on the seat of an electric vehicle to prevent fire.
Correct charging time for lithium-ion battery electric vehicles
The correct way to charge a lithium-ion battery for an electric vehicle is to follow the standard charging time and procedure, even for the first three times. After the charger indicator light turns green, continue charging for about 1-2 hours, then stop charging. In particular, avoid charging for more than 12 hours; the typical charging time is 3-5 hours.
When the battery is 100% depleted, the charging time is generally around 8 to 10 hours. Do not exceed 12 hours. It is not recommended to use up all the battery every time. It is generally recommended to charge when the battery level is around 70%, at which point the charging time is generally 6 to 8 hours.
Modern electric vehicle lithium-ion battery chargers use a three-stage charging process: constant voltage, constant current, and trickle charging. The first two stages are crucial. After these stages, the battery is essentially fully charged, and the indicator light will turn green, indicating the start of the trickle charging stage. To protect the battery, do not disconnect the power cord during this time. Continue charging for 1-2 hours to effectively extend battery life. However, once the light turns green, do not exceed 8 hours.
Generally, it's best to charge electric vehicle lithium-ion batteries according to the specifications in the datasheet. If that's not available, you need to calculate based on the capacity of the lithium-ion battery and the current of the charger. For example, a 48V/20A lithium-ion battery with a 5A charger will take a little over 4 hours to charge, a 10A charger will take a little over 2 hours, and a 20A charger will take one hour.
In summary, the above are the correct charging methods for lithium-ion batteries in electric vehicles. Frequent, prolonged charging can cause premature loss of the electrolyte in lithium-ion batteries, thus affecting their lifespan.
