Why do EVs stop automatically during charging?

Why does my electric car automatically stop charging during charging?

Why does it stop charging at 95%?

Is the charge stopped because there is a problem with the EV Charger?

EVs stop automatically during charging

Electric vehicle owners must have doubts and even complaints about the process of using charging piles.

Indeed, as a tool for travel, a stable way of replenishing energy is the foundation and the key.

Unexpected conditions such as “charging interruption” will directly affect the use of electric vehicles

So, is the “charging interruption” really all the reason for the charging pile?

In order to protect charging safety

SOC, the full name of State of Charge, is the charging state of the battery, also known as the remaining power.

It represents the ratio of the amount of discharge left to its full charge, usually expressed as a percentage.

In order to prevent their cars from overcharging, many owners will set the SOC of their vehicles below 100%. When the charging power has reached the preset SOC value, it will stop charging.

And most of the common charging operators will also adjust the SOC threshold of the station in consideration of security issues.

For example, they adjusted the SOC threshold to 98%. When the pile end detects that the remaining power of the vehicle has reached 98%,

it will automatically stop the charging operation.

This is a normal phenomenon. This setting is in order to avoid the battery short-circuit problem that may result in unnecessary safety accidents.

SOC system interface

What are the reasons for “automatically stop charging”?

As can be seen from the above, in fact, “charging interruption” is not entirely a problem of EV Chargers. So what are the reasons and what can we do?

  • Insulator detection fault:
  1. When there is an insulator detection fault, first confirm whether the model and connector are consistent;
  2. Check whether the vehicle charging port has foreign bodies or water stains.
  • BMS- High voltage/alarm, timeout:
  1. Confirm that the vehicle is stopped and turned off, switch to the correct model on the charging pile screen, and then carry out the correct charging steps;
  2. If the display is still abnormal, it is recommended to restart the vehicle or change the pile to try charging again;
  3. If the vehicle power is too low, especially less than 10%, it is recommended to use an AC EV charger to properly recharge, and then use a DC EV charger to charge.
  • Abnormal connection between charging pile and car/pile starting response times out:
  1. Confirm whether there is foreign matter in the connector to ensure the reliability of the connection;
  2. Re-pull and insert the charging gun, hold the handle of the charging gun, insert it into the charging pile port, and hear a “click” sound, indicating that the charging pile has been correctly inserted;
  3. If the connection is still abnormal, it is recommended to replace the charger and start charging again or contact customer service staff.

Of course, if the weather is hot, the high temperature will trigger the thermal protection device of the EV Charger. And there will also be a ” charging interruption ” situation, which aims to prevent the battery from overheating and causing danger.

SOC system interface2

Seek full charge?

When the automatic charging stops, the remaining power of the vehicle has reached the preset SOC, then it can be regarded as normal.

When the power does not reach the relevant value, but the charging is interrupted, you can re-insert the gun and start charging again.

So what if you’re going for a 100% full charge?

Under the premise of SOC setting to 100%, you can use the fast charging station to charge to the SOC threshold, and then choose AC EV Charger to recharge. This will allow for a full charge.

However, it is still recommended that you follow the charging principle of partial charging and reducing a deep discharge, which is more in line with the normal use of lithium cells.

Charging is the process of “communication” between the car and the charger. A good charging experience requires the “tacit understanding” and “harmony” of the two. Improving the charging experience of customers is also what Bluesky is trying to do.

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