What are the reasons for BYD DMi-EV limitation?
3 Answers
BYD DMi-EV limitation refers to the occasional dashboard alert of EV function limitation during driving, where the engine starts, and the system can resume normal operation after turning off and restarting the power, with the fault occurring irregularly. The following are the reasons for DMi-EV limitation: 1. Battery pack failure. 2. BMS failure. 3. Drive motor controller failure. 4. Related circuit failure. Here is a brief introduction about BYD Auto: BYD Auto, generally referring to BYD Company Limited, is headquartered in Shenzhen, Guangdong, China. It is a new technology private enterprise with three major industrial groups: IT, automobiles, and new energy.
Speaking of the power limitation issues with BYD DM-i or EV models, I've been driving this car for a while and often hear people discussing it. The main reasons lie in the battery management system. When the battery level is too low or the battery temperature is abnormal, the system automatically enters protection mode to limit power output, preventing battery over-discharge damage. Another cause is software bugs, such as when certain version updates fail, the vehicle may misjudge a fault and enter a limited state. Additionally, poor electrical contact or cooling system failures can also trigger it. I once experienced this on the highway due to oxidation of the charging port causing unstable connection. To prevent this, I've developed habits like regularly checking battery health, using original chargers, ensuring timely software updates, and not forcing the car to drive when limited—instead pulling over to restart the system or visiting a 4S shop for line checks. Maintaining the battery above half charge during daily driving significantly reduces risks—safety first, after all.
As a seasoned driver with years of experience behind the wheel of DM-i models, I believe the primary causes of performance limitations can be categorized into several key areas. The state of the power battery is fundamental - decreased health or insufficient charge in low temperatures can trigger system current restrictions. Secondly, control unit malfunctions, such as overheating of the electronic control module or software compatibility issues, may cause the vehicle to mistakenly activate protection modes. Common hardware problems include blown fuses and relay failures in the circuitry. External factors like improper modifications or frequent aggressive acceleration accelerating component aging also contribute. Occasionally, poor charging environments can lead to instability. The solution is to immediately stop and inspect when the dashboard displays warnings, avoiding forced driving to prevent further damage. Regular maintenance including battery testing and software calibration is crucial - I recommend professional diagnostic scans every six months to detect issues early and avoid major troubles. Driving experience teaches us that prevention is far simpler than repairs.
