During the daily charging process, many new energy vehicle owners
may have encountered the situation where the charging gun automatically disconnects when the battery is nearly full.
What is the reason behind this? Stay tuned for today’s article
to gain deeper insights.
Principle of New Energy Vehicle Charging~
01
SOC is Around 98% to Ensure Charging Safety
SOC, short for State of Charge, refers to the charging status of the battery. It indicates the ratio of the remaining dischargeable energy to the fully charged energy of the battery, usually expressed as a percentage.
Many vehicle owners set their vehicle’s SOC below 100% to prevent overcharging. When the charging energy reaches the preset SOC value, charging will stop. Additionally, charging operators often adjust the SOC threshold for safety reasons. That is, when the charging station detects that the vehicle’s remaining energy has reached the set value, it will automatically stop the charging operation.
This leads to what many refer to as the “jump gun” or “not fully charged” situation, which is a normal phenomenon. This setting is to prevent potential battery short-circuit issues that could arise from overcharging when the vehicle’s built-in BMS (Battery Management System) cannot automatically interrupt the charging operation, which may lead to fires and unnecessary safety incidents.
02
Achieving a Full Charge Through Slow Charging
Therefore, if the “jump gun” occurs and the vehicle’s remaining energy reaches the preset SOC, it can be considered a normal situation. If the energy has not reached the relevant value but disconnects, you can reinsert the charging gun and restart the charging. Of course, some charging stations may further lower the SOC setting for safety in high temperatures, and users can consult station administrators or customer service for specifics based on actual conditions.
If you want to pursue a 100% full charge, with the vehicle’s SOC set to 100%, you can charge at a fast charging station until the SOC threshold is reached, and then choose a slow charging station for trickle charging to achieve a “full charge.” However, it is still recommended to follow the usage pattern of shallow charging and shallow discharging, which is more in line with the normal usage state of lithium batteries.
END
