What are the reasons for the inability to charge due to BMS failure in new energy vehicles?
3 Answers
Blown fuses, poor contact, poor plug contact, and battery end-of-life can all cause BMS failure in new energy vehicles, resulting in the inability to charge: Blown fuse: If the fuse inside the battery is blown, the only solution is to replace the internal fuse of the battery. Poor contact: Poor contact includes many aspects, such as poor contact between the fuse tube and the fuse seat, poor contact between the plug and socket, and poor contact between the charger and power source. These situations can affect the normal charging of the electric vehicle, leading to the battery not charging or not charging fully. Try reconnecting; if it still doesn't work, consider other reasons and address them promptly. Poor plug contact: Poor contact inside the battery is mainly due to connection issues between the positive and negative terminals. Try reconnecting or replacing the wires. If it still doesn't work, you may need to visit a 4S store for repairs. Battery end-of-life: The lifespan of a battery is about 5 years, but frequent incorrect charging methods can cause the battery to fail prematurely. The solution is to replace the battery.
I've been driving a new energy vehicle for several years, and BMS failures causing charging issues are quite common, mainly due to monitoring errors in the battery management system. For example, if a temperature sensor is faulty, the system might mistakenly judge the battery as overheating or overcooling, directly interrupting charging for safety. Software bugs can also cause trouble—outdated versions or update conflicts may make the BMS think the battery is fully charged or has a short circuit. Hardware issues like damaged circuit boards or disconnected communication lines can prevent the BMS from communicating with the charger, halting the charging process. Usually, it's important to watch out for weather effects, as extreme temperatures can easily trigger faults. It's best to use the original manufacturer's charging pile to avoid compatibility issues. If you find that charging isn't working, don't panic—first try restarting the vehicle or checking the charging cable. If that doesn't help, go to a 4S shop for repairs immediately to prevent long-term battery inactivity from shortening its lifespan. I've encountered this issue twice myself, and a simple software update fixed it.
As someone who frequently tinkers with electric vehicles, I suspect that the BMS's inability to charge might stem from system self-checks. If the BMS detects uneven battery voltage or aging battery cells, it will block charging to prevent explosion risks. Common causes include hardware aging, sensor malfunctions leading to incorrect data readings; software issues like programming errors or memory leaks causing the BMS to make confused judgments; and communication failures, such as loose connectors preventing the BMS from exchanging signals with the charging module. When charging, avoid overusing fast charging, which can overload the system and cause problems. Try switching to slow charging mode or changing the environment, like avoiding charging in a hot garage. From my experience, it's best to first visit a repair shop to scan for error codes with a diagnostic tool to pinpoint the issue before making repairs. Safety comes first—don't recklessly dismantle the wiring yourself.
