What Causes Abnormal Noises in New Energy Vehicles?

[DeMaverick]

New energy vehicles may produce abnormal noises during charging due to high temperatures, fan operation, or dust accumulation in the charging system. Below are detailed explanations and solutions: Temperature-related causes: If the ambient temperature is low and heat dissipation is efficient, the fan may not start or operate at a low speed. However, if the temperature exceeds 40 degrees Celsius, the fan will start running. When the temperature surpasses 50 degrees Celsius, the fan will operate at maximum speed, producing noticeable buzzing sounds that the owner can hear. Solution: Charge the vehicle in locations with lower ambient temperatures or better ventilation. Dust accumulation issue: Over time, dust accumulation in the charging system can also cause loud noises. During charging, new energy vehicles generate static electricity, which attracts dust from the environment to the charging system. This impairs heat dissipation, causing the temperature to spike immediately when the charging gun is connected, forcing the fan to operate at maximum speed continuously. Solution: Regularly clean the accumulated dust.

[SanIan]

Don't panic over abnormal noises in new energy vehicles—they're often minor mechanical issues. Last time I encountered this, it was the underbody guard plate loosened by a rock impact, causing a rattling sound while driving. A high-frequency whine might indicate worn bearings in the motor reducer, more noticeable in cold temperatures. If there's a squeaking sound during braking, it's likely due to thin brake pads or trapped debris. Also, don't overlook suspension noises—a clunk over speed bumps may suggest deteriorated top mounts. When possible, lift the vehicle to check chassis bolt torque, as many noises stem from loose assemblies. Remember to inspect CV joint boot integrity—ruptures leading to oil leaks can damage the drivetrain.

[AdamAnn]

Hearing a chirping sound while driving? Here are possible reasons: Poor contact in the high-voltage wiring harness can produce an electric current sound, somewhat like a bird chirping. When the charging pile contactor malfunctions, charging will produce a buzzing noise; this is a common issue at our community charging station. If the air conditioning compressor makes a clicking sound upon startup, it's likely due to insufficient refrigerant or loose piping. A buzzing sound from the rear should prompt a check on the battery cooling fan; a clogged filter can cause it to spin wildly. The most critical is the metallic friction sound from damaged reducer gears, which requires immediate stopping and inspection. It's recommended to record the abnormal sound environment with a phone and play it for the technician during repairs for easier diagnosis.

[TylerRose]

Address rattles by location. Clanking from the chassis area? Check battery pack mounting bolts. Whistling from the front compartment? Inspect motor mount brackets. Rustling near the wheels? Usually just rusty brake discs. New energy vehicles often have high-frequency sounds from heat pump AC systems – that's normal refrigerant flow noise requiring no repair. Steering column squeaks? Just add some grease. Remember, 80% of rattles come from loose plastic trim panels – even an unsecured first-aid kit in the trunk can cause tapping sounds.