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What does the EV limitation of BYD Qin Plus DM-i mean?

2 Answers

VonMatthew

07/25/25 2:56am

The EV limitation of BYD Qin Plus DM-i refers to a type of fault issue in electric vehicles (BEV/PHEV, etc.), where the high-voltage electrical system fails to function properly. This involves components such as the battery pack, onboard charging device, electric drive and control electronic system, air conditioning compressor, and other electrical appliances. Reasons for triggering EV function limitation: The first reason is that the vehicle's high-voltage management system detects a structural open circuit in the high-voltage interlock loop. To protect personnel safety, it disconnects the high-voltage circuit electrical connection. The second reason is functional high-voltage interlock, typically where sensors, based on detected critical vehicle data status, disconnect the high-voltage circuit electrical connection to ensure personnel safety and prevent further vehicle damage. Both reasons can lead to vehicle performance limitations, resulting in the EV function being restricted. Possible scenarios when EV function is limited: Fault alarm: This alerts the driver through dashboard warning lights or related warning messages. Reduced high-voltage output power: This lowers the motor's output power, giving the driver time to react and stop the vehicle. Cut-off of high-voltage output: When the vehicle is in a stopped state, the high-voltage output is directly cut off, preventing the vehicle from starting.

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LeLane

08/10/25 4:46pm

That day, I was driving my BYD Qin Plus DM-i EV for an outing when the dashboard suddenly displayed the word 'Limited,' which gave me a scare. Simply put, it means the vehicle system automatically restricted power output, possibly due to an overheated battery pack, a software glitch, or an issue with the motor. In hybrid vehicles, when sensors detect minor problems, they activate a protective mode—preventing you from driving too fast or accelerating abruptly to avoid damaging components. It happened once in my car, where the speed directly dropped below 60 km/h, and it felt like pressing the accelerator had no effect. Emergency response? I quickly pulled over, turned off the engine, waited five minutes, and restarted—sometimes it would recover. But in the long run, it's best to drive to a 4S shop for a detailed inspection and not delay, to avoid battery degradation affecting daily commutes. Remember, this is a common issue, and regular maintenance can reduce the risks.

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