What are the reasons for the BYD e5 charging gun tripping?

[SanJoy]

The main reason for the BYD e5 charging gun tripping is that the power of the charging pile is greater than the circuit power. The following are the related reasons and solutions: 1. Power mismatch: In terms of the power of the charging pile, the charging power is 3.5kW (220V, 16A) and 7kW (220V, 32A). When the power of the charging pile is greater than the circuit power or the on-board charger power is greater than the power of the charging pile, it will cause the charging gun to trip. Solution: Find a charging pile with the correct power for charging. 2. BMS communication problem: There is a problem with the communication module between the vehicle's BMS and the charging pile, causing it to send wrong commands and leading to the charging gun tripping. Solution: Perform a software upgrade for the vehicle.

[Kara]

I've been using the BYD e5 for almost three years now, and I've encountered charging interruptions multiple times. The main issue is poor contact at the charging port, especially after rain when moisture gets in and causes oxidation of the metal contacts, leading to poor connection. The charger then detects an abnormality and automatically cuts off the power. Another common reason is excessively high battery temperature. Charging outdoors in summer for over an hour can raise the battery pack temperature above 45°C, triggering the protection system to forcibly disconnect. The charging station itself also matters—older DC fast chargers with unstable voltage or abnormal data communication can cause interruptions. A minor but important detail is if the charging gun isn’t fully inserted; if the latch doesn’t make a crisp click sound, there’s likely poor contact. Lastly, a reminder to everyone: onboard charger malfunctions can also cause interruptions. A fellow owner experienced this when the cooling fan in the charging module failed, causing the system to overheat and shut down. Always remember to dry the port before charging and avoid high-temperature periods for the safest experience.

[VonWalter]

Charging interruption, simply put, means the charging process is forcibly terminated. Dirty charging gun heads are the primary culprit—dust accumulation on metal contacts is like lint in a phone charging port, increasing contact resistance and disrupting communication signals. The Battery Management System (BMS) is highly sensitive; it will cut power immediately if it detects abnormal voltage in a single cell or a temperature difference exceeding 5°C. Power mismatch between the charger and the vehicle is also common—using a 120kW charger on a car that only supports 60kW is like connecting a small hose to a high-pressure water gun, causing it to burst. Once, my car kept interrupting charging in the garage, and it turned out the charging cable was pinched by the door, damaging internal wiring. Additionally, sudden grid voltage fluctuations can trigger protection mechanisms, especially in urban villages during peak hours when voltage fluctuates wildly. It's recommended to first check the charging gun contacts—carrying alcohol wipes to clean the ports works wonders.

[Xavier]

After studying the BYD e5 charging protocol, it's clear that the core issue of charging interruption lies in handshake failure. During the initial charging phase, the vehicle and charging station exchange hundreds of authentication data packets, and any signal interference can disrupt this process. The most common cause is a faulty electronic lock on the charging gun, where incomplete engagement leads to poor contact in communication pins. Compatibility issues also arise with outdated charging station software versions - for instance, a 2015 version charging station may frequently fail when charging 2020 model vehicles. The vehicle's onboard charger overload protection is another often overlooked factor; exceeding power limits while charging with air conditioning on can directly trigger a shutdown. Even mobile signal jammers in underground parking lots can interfere with charging communication frequencies - I've personally experienced cases where moving the car just 10 meters solved the problem. My recommendation is to turn off all vehicle electronics during charging, and if interruptions occur, simply trying a different charging station usually resolves the issue.

[Madeline]

After five failed attempts, I finally figured out the tricks. The temperature sensor in the charging gun is the most sensitive—it cuts off power if the nozzle exceeds 65°C. In summer, soaking the gun in cold water actually works wonders for cooling it down. Damaged charging cables are easily overlooked; after my cable got cracked by a car wheel, the resistance increased, causing it to disconnect every ten minutes. The unactivated battery preheating function is another headache—during subzero charging, the BMS forcibly pauses heating for half an hour. I’ve even encountered weirder issues—a short circuit in the charging port’s illumination light drained the 12V battery, causing chaos in the vehicle’s low-voltage system and triggering protection measures. Now I’ve learned my lesson: before charging, I check the cables for bulges, and in freezing weather, I remotely activate battery preheating first. Never let small issues escalate into major faults.

[VanAlexandra]

The gun tripping is essentially a safety mechanism in action. Sudden current changes during the charging handshake phase can trigger it, such as starting the vehicle immediately after plugging in the gun. Poor grounding of the charging pile is more dangerous, as voltage drift exceeding 50V will inevitably trip. Once, I used an extension cord for charging, but the wire was too thin and heated up, causing a voltage drop, and the system judged it as abnormal and cut off. When the differences between individual cells in the battery pack are too large, the BMS will actively terminate charging to prevent overcharging. In this case, it's necessary to go to a 4S shop for balance maintenance. Incorrect settings in the charging app are also common, such as overlapping scheduled charging times causing logical conflicts. The most worry-free method is to record the tripping time: if it happens at the beginning, it's mostly a contact issue; if it trips at 80%, it's a battery health warning. Carrying a multimeter to measure the charging pile's voltage is advisable, with a stable 220V±10% being the safest.