Why is the red light on the electric vehicle charger flashing and beeping continuously?
4 Answers
Electric vehicle charger's red light flashing and beeping continuously indicates that the device has not been fully charged. When fully charged, it will display a green light. If there is no indicator light, it may be due to not using the original charger, and the charger needs to be replaced; it could also be caused by battery aging, requiring a battery replacement to resolve the issue; or the charger might be damaged, and trying a different charger could help. Electric vehicles, also known as electric-driven vehicles, are divided into AC electric vehicles and DC electric vehicles. The electric vehicles commonly referred to are those that use batteries as the energy source, converting electrical energy into mechanical motion through components such as controllers and motors, with speed controlled by adjusting the current.
I encountered the same situation last time when charging my Emma electric scooter. At that time, the charger's red light was flashing and buzzing, which scared me so much that I immediately unplugged it. Later, I found out it was because the charging plug wasn't inserted tightly, causing poor contact with the metal plates. It could also be due to unstable voltage at home, especially during peak electricity usage hours in old residential areas at night. Also, when the battery has been undercharged for a long time and can't take a charge, it may trigger the protection mode with flashing lights. My suggestion is to unplug it, wait for ten minutes, and try again. Check if there's dust in the charging port. If that doesn't work, borrow a neighbor's charger of the same model for cross-testing. This can basically help determine whether it's a problem with the scooter or the charger. Never try to make do with it, as it could easily burn out the circuit board!
My Niu electric scooter's charger kept flashing a red warning light with a slight buzzing sound recently. I specifically went to the after-sales service to ask about it. The technician said there could be several reasons: the cooling fan is stuck or burnt out, causing high internal temperature which triggers the red warning light; the output circuit has aged with exposed wires causing a short circuit; or the battery pack voltage is abnormal and mismatched. The technician advised me to first feel the charger's casing temperature – if it's scalding hot, stop using it immediately. He also taught me a testing method: plug it in without load to see if the red light stays on steadily. If it still flashes without load, it's likely a charger malfunction. In this case, it needs replacement – buying one with the same parameters online costs about a hundred yuan.
Yesterday when charging my Yadea scooter, the charger suddenly went crazy with flashing red lights and a sizzling sound. Remembering a friend mentioned that oxidized battery charging ports can cause this, I used a cotton swab dipped in alcohol to clean the positive and negative copper contacts. Turns out there was a layer of green corrosion on the contact surfaces! Another time after rain, I had this issue and found moisture inside the circuit board when I opened it up. Drying it in a rice bin for two days fixed it. Nowadays, smart chargers will flash warning lights if the battery temperature exceeds 45°C as a protection measure, so it's best to charge in shaded areas during summer. If you can't fix it yourself, take it to a shop for inspection - safety first.
