Why does the lithium electric car suddenly lose power but regain it after re-plugging?
4 Answers
Lithium electric car suddenly losing power but regaining it after re-plugging may indicate battery damage, and immediate repair is recommended. Causes of car battery damage: Continued operation of the cigarette lighter after turning off the engine; not turning off multimedia or air conditioning systems before shutting down the engine; prolonged use of electricity after turning off the engine; frequent or prolonged ignition attempts. Battery maintenance methods: Avoid storing the battery in a depleted state. A depleted state refers to the battery not being charged promptly after use, which can lead to sulfation. Lead sulfate crystals form on the electrode plates, blocking ion channels and resulting in insufficient charging and reduced battery capacity. The longer the battery remains unused in a depleted state, the more severe the damage. When the battery is not in use, it should be charged once a month to extend its lifespan.
It's quite common for electric vehicles to suddenly lose power and then regain it after re-plugging. I've pondered this issue myself while tinkering with my own vehicle. The most frequent cause is poor contact, where dust buildup or slight oxidation between the plug and socket leads to unstable connections; daily vibrations or bumps can interrupt the power, and re-plugging temporarily restores the connection. It could also be the battery's internal protection circuit kicking in, such as when overheating or a sudden current surge triggers protection mode, and plugging it back in resets it. Additionally, an aging or faulty charger with unstable output can cause intermittent power supply. In the long run, ignoring this issue can lead to reduced battery life or potential overheating risks. I recommend regularly cleaning the charging port, checking if the plug fits snugly, and avoiding use in high-temperature environments. If possible, use a multimeter to test if the charging voltage is stable, preventing minor issues from turning into major faults early on.
From a safety perspective, I think this issue is quite important. Sudden power loss and recovery in lithium battery electric vehicles may hide potential hazards. It's usually a connection problem, such as loose or oxidized terminals in the plug and socket, which disconnect due to vibration and reconnect when plugged back in. Another reason could be the activation of battery protection functions, such as safety mechanisms triggered by excessive load or temperature changes, where plugging and unplugging resets the circuit. However, frequent occurrences of this phenomenon should not be taken lightly, as it may lead to unexpected power loss during operation, causing accidents. I'm also concerned about charger damage leading to unstable output or battery aging causing internal short circuits. To prevent this, clean charging port stains, ensure the plug is fully inserted, and if the issue persists, stop using it and seek professional repair. Safety first—don't be careless. Maintaining your equipment properly can save a lot of trouble.
My lithium e-bike had a similar issue before. After powering off and reconnecting, it worked again. Most likely, the charging port was loose or dirty—cleaning and securing it solved the problem. It could also be a temporary disconnection caused by vibration, and reconnecting fixed it. Simply check if the plug is oxidized or loose, and clean the terminals with alcohol wipes to see if there's any improvement. If it's an internal battery protection function like overcurrent triggering, unplugging and replugging resets the system. Don’t rush to replace parts; check if routine maintenance is adequate. If the issue recurs, get it inspected at a shop for peace of mind—don’t overlook small details that could lead to bigger problems.
