During daily charging, many electric vehicle owners may have encountered the situation where the charging gun automatically stops when the battery is close to full.
What is the reason for this? Follow today’s article to gain a deeper understanding of the charging principles of electric vehicles.
01
SOC is About 98% to Ensure Charging Safety
SOC, or State of Charge, refers to the battery’s charging status, also known as remaining power. It represents the ratio of the remaining dischargeable power after the battery has been used for a while or kept for a long time to its fully charged power, usually expressed as a percentage.
Many vehicle owners set their car’s SOC below 100% to prevent overcharging. When the charging power reaches the preset SOC value, charging will stop. Additionally, most common charging operators adjust the SOC threshold at their stations for safety reasons. When the charging station detects that the vehicle’s remaining power has reached the set value, it will automatically stop the charging operation.
This leads to the so-called “jumping gun” or “not fully charged” situation, which is a normal phenomenon. This setting is to avoid potential battery short-circuit issues that could arise from overcharging when the vehicle’s built-in BMS (Battery Management System) fails to automatically interrupt the charging operation, possibly leading to fires and unnecessary safety incidents.
02
Can Achieve Full Charge Through Slow Charging
Therefore, if the charging gun stops and the vehicle’s remaining power has reached the preset SOC, it can be considered normal. If the power has not reached the related value and the gun stops, you can reinsert the gun and restart charging. Of course, some charging stations may further lower the SOC setting to increase safety during high temperatures and other weather conditions. You can consult the station administrator or customer service for specific information based on actual conditions.
So, if you want to pursue a full charge of 100%, under the premise that the vehicle’s SOC is set to 100%, you can charge at a fast charging station until the SOC threshold is reached, and then switch to a slow charging station for trickle charging to achieve “full charge.” However, it is still recommended to follow the practice of shallow charging and shallow discharging, which is more in line with the normal use state of lithium batteries.
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New Media Editor: Du BeibeiNew Media Review: Wen Yuanyuan, Shi LeleNew Media Supervisor: Yao Jinghua
Source: Shijiazhuang Vehicle Management Online,If there is any infringement, please contact us for deletion.