Does slow charge to 100% affect battery health?

01 Principle & Characteristics of slow charging
The AC charging pile is usually called "slow charge", and the slow charge pile transmits alternating current to the vehicle charger, and the vehicle charger converts the alternating current to the direct current required by the battery pack to charge the battery pack. Slow charge because of the lower power, compared to fast charge (DC pile), full battery time is also longer. At the same time, due to its lower charging power, the temperature of the battery during the charging process is lower, which is conducive to improving the battery life.

02 Slow charge to 100%, is it really feasible?
Small battery impact: Slow charge compared to fast charge, the full charge process is gentler, the charging current is smaller, and less heat is generated during the charging process, so under normal conditions of use, charging the battery to 100% by slow charge usually has less impact on battery health.
Prevention of overcharge risk: Compared with fast charge, slow charge has two advantages to effectively prevent overcharge risk: first, slow charge charging current is smaller, overcharge risk is also lower; Second, the slow charge to the vehicle OBC power supply, the vehicle OBC then charge the battery, OBC detects that the battery is full, it will automatically stop charging, to protect the battery, so as to effectively avoid the occurrence of overcharge. Choose a slow charge to charge the battery, overcharging can have a serious impact on battery life and safety.
Long-term effects of continuous high power: Although slow charging to 100% has little impact on battery health, if the battery is maintained at a high power level or full charge level for a long time, it will accelerate battery aging, resulting in battery bulges, battery passivation and other sites. Therefore, it is recommended that car owners try to avoid long-term full charge storage of vehicles.

03 How to use slow charge reasonably
Develop the habit of "shallow charging and shallow discharge" : The best charging range of lithium iron phosphate batteries is usually considered to be between 20%-100%; The best charging range for terpolymer lithium batteries is usually believed to be between 20% and 80%, which is more beneficial for extending battery life, of course, the specific recommendations provided by the car battery maintenance manual prevail.
Planning charging plan: Owners should reasonably plan the charging schedule according to their driving habits and needs to reduce unnecessary charging during the vehicle deactivation, so as to avoid unnecessary overcharging of the battery.
Regular "deep charge and deep discharge" : It is recommended to fill the battery regularly and discharge it deeply according to the requirements of the car battery maintenance manual, which is conducive to activating the battery and making the battery service life longer. It is generally recommended to deep-charge and deep-discharge once every 1-2 months.

Slow charge option: Choosing a quality slow charge is also a key factor, it is crucial to ensure charging efficiency and the long-term health of the battery.

Overall, the damage to the battery caused by slow charging to full charge is usually small, but owners should avoid leaving the battery in a state of high power for a long time to maintain the health of the battery and extend its service life.