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During the daily charging process, many new energy vehicle owners
may have encountered the situation where charging automatically stops when it is close to being full
What is the reason for this? Follow today’s article
to gain deeper insights
The charging principle of new energy vehicles~
01
SOC is about 98% to ensure charging safety
SOC, which stands for State of Charge, refers to the battery’s charging status, also known as remaining power, representing the ratio of the remaining dischargeable power after the battery has been used for a period to its fully charged power, usually expressed as a percentage.
Many owners, to prevent overcharging their vehicles, will set the SOC below 100%. When the charging power reaches the preset SOC value, charging will stop. At the same time, most charging operators in the market, considering safety issues, will adjust the SOC threshold at the charging stations, meaning that 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 what people commonly refer to as “jumping guns” or “not being able to charge fully”; this is a normal phenomenon. This setup is intended to avoid the potential battery short circuit issues that may arise if the vehicle’s internal BMS (Battery Management System) cannot automatically interrupt the charging operation, which could lead to fires and unnecessary safety incidents.
02
Can achieve “full charge” through slow charging
Therefore, if the “jumping gun” occurs and the vehicle’s remaining power has reached the preset SOC, it can be considered normal. If the power has not reached the relevant value and it “jumps guns,” you can reinsert the charging plug and start charging again. Of course, some charging stations may further lower the SOC setting to increase charging safety in high-temperature weather; you can consult the station manager or customer service for specific inquiries and make judgments based on the actual situation.
So, if you want to pursue 100% full charge, under the premise that the vehicle’s SOC is set to 100%, you can charge it to the SOC threshold at a fast charging station, then switch to a slow charging station for trickle charging, which will achieve a “full charge.” However, it is still recommended to follow the shallow charge and shallow discharge usage pattern, as this is more in line with the normal usage state of lithium batteries.
END
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Langfang Vehicle Management
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