With the continuous increase in the penetration rate of new energy vehicles, pure electric vehicles have become one of the mainstream choices for public transportation and private commuting. However, related riding experience issues have gradually emerged.
Recently, many consumers have reported experiencing discomfort such as dizziness, nausea, and ear pressure when riding in pure electric vehicles, and related discussions have repeatedly trended on social media platforms. Some consumers stated that they had no issues working or watching movies during long trips in fuel-powered vehicles, but experienced obvious motion sickness symptoms even during a short 20-minute commute in pure electric vehicles. The discomfort is more pronounced for some people when riding in the back seat.
Related false rumors have also spread: some claim that this phenomenon is related to excessive radiation from electric vehicles, while others argue that it is due to insufficient comfort caused by low vehicle prices. Some consumers even attribute the cause entirely to individual vestibular function abnormalities.
To help consumers scientifically understand this phenomenon, we combine medical principles, vehicle technical characteristics and industry measured data to conduct a comprehensive analysis of the motion sickness problem in pure electric vehicles.
01 Adaptability Assessment Based on Operational Phase
From a medical perspective, the discomfort caused by riding in a pure electric vehicle is essentially motion sickness, with the core诱因 being signal mismatch in the human balance perception system. According to clinical medical statistics, approximately 30% of the population has varying degrees of susceptibility to motion sickness. In scenarios with high signal mismatch, even people without a history of motion sickness may experience discomfort.
The human brain's determination of motion state mainly relies on the collaborative verification of three types of perception signals:
Inner ear vestibular system signals: As the body's built-in balance sensor, it can capture instantaneous changes in motion states such as acceleration, deceleration, and steering in real-time.
Visual signals: By capturing the dynamics of the surrounding environment, it transmits information such as displacement state and movement speed to the brain.
Proprioceptive signals: Muscles and joints can synchronously feedback the body's motion state through force changes (such as push-back feeling, shaking feeling).
Under normal circumstances, the three types of signals remain highly consistent. For example, when accelerating in a fuel-powered vehicle, the power increases linearly. The vestibular system perceives acceleration, the visual system captures the road scenery moving backward, and the proprioceptive system feels the push-back force. After the brain verifies that the three types of signals match, it determines a normal motion state and does not trigger discomfort.
If there is a deviation among the three types of signals, the brain will make a misjudgment. In the balance perception mechanism formed by human evolution, signal mismatch only occurs when hallucinations are produced due to toxin ingestion. Therefore, the brain will default that the body is poisoned and trigger defensive reactions such as nausea and vomiting to expel toxins. This is the core logic of motion sickness. The three core technical characteristics of pure electric vehicles happen to increase the probability of signal mismatch, making them more likely to trigger motion sickness reactions.
02 Three Characteristics Trigger Motion Sickness in Electric Vehicles
(1) Power Response Speed Far Exceeds Fuel-Powered Vehicles, Making It More Difficult for Human Perception Systems to Adapt
There are fundamental differences in power output characteristics between fuel engines and electric motors: the power output of a fuel engine is a linear increase process. After the driver steps on the accelerator, the engine needs to complete processes such as speed increase and gearbox shifting, usually requiring 1-2 seconds to reach maximum torque output. The acceleration process is gentle, reserving sufficient time for the synchronization and matching of the three types of perception signals. The brain can gradually adapt to the motion state, and discomfort is less likely to occur.
In contrast, the electric motor of a pure electric vehicle can output maximum torque within 0.1 seconds. Even entry-level household pure electric models generally have better acceleration performance than fuel-powered vehicles of the same price. Such instantaneous acceleration impact will make the vestibular system capture the drastic change in motion state immediately. If passengers look at their phones or observe stationary items inside the vehicle at this time, the visual system will send a signal of "the body is in a stationary state" to the brain. The contradiction between the two types of signals makes it impossible for the brain to determine the motion state, thereby triggering reactions such as dizziness and nausea.
Some drivers of operational vehicles frequently accelerate and decelerate sharply to improve traffic efficiency, further amplifying the impact of instantaneous power shocks. This is an important reason why pure electric vehicles used for ride-hailing are more likely to cause discomfort.
(2) Unpredictable Drag from Kinetic Energy Recovery Further Exacerbates Signal Mismatch
Kinetic energy recovery is an exclusive design for pure electric vehicles, with the core function of improving续航 efficiency. When the driver releases the accelerator, the motor does not enter an idle coasting state like a fuel engine, but switches to generator operation mode, converting driving kinetic energy into electrical energy and recharging it to the battery. This process will produce obvious deceleration effects. Different brands have significant differences in kinetic energy recovery tuning logic. Some performance-oriented models have a maximum kinetic energy recovery intensity of up to 0.3G deceleration, equivalent to the force of lightly stepping on the brake, and can even reach the acceleration level of an elevator emergency stop.
Unlike deceleration in fuel-powered vehicles, this kind of kinetic energy recovery deceleration has no clear early warning. When riding in a fuel-powered vehicle, the coasting deceleration after the driver releases the accelerator is gentle, and passengers can adapt in advance. Even if the driver steps on the brake, it is usually accompanied by changes in road conditions ahead, and passengers can predict and adjust their body state in advance through vision.
However, the kinetic energy recovery of pure electric vehicles is triggered passively, only requiring the driver to release the accelerator. Passengers have no room for advance prediction. When the body is still in the inertial forward state, it suddenly receives drag force. The vestibular system perceives deceleration, but the visual system does not receive an early prediction signal. The brain receives conflicting information again, and the discomfort reaction will be significantly aggravated.
According to industry research data, the incidence of motion sickness when riding in the back seat of a pure electric vehicle is more than 3 times higher than in the front seat. The core reason is that the rear view is limited, making it difficult for passengers to predict road conditions ahead and vehicle acceleration/deceleration rhythms, and difficult to adapt to the motion state in advance. This is also the core reason why many ride-hailing passengers prefer to sit in the front seat.
(3) Hidden Stimulation from Low-Frequency Vibration Easily Ignored by Consumers
Many consumers experience ear pressure and head swelling when riding in pure electric vehicles, which cannot be relieved even by opening windows for ventilation. The core诱因 of such discomfort is low-frequency vibration.
During the operation of a fuel-powered vehicle, engine noise and vibration can mask the 20-200Hz low-frequency vibration transmitted by the body and chassis, and the human body basically cannot perceive such signals. However, pure electric vehicles have no engine structure, and the NVH (Noise, Vibration, and Harshness) performance is better during operation. The originally masked low-frequency vibration will appear: tire noise when driving on paved roads, slight vibration transmitted by the chassis, and body resonance caused by design defects of some models will continuously produce low-frequency vibration.
According to test data in the automotive engineering field, when the low-frequency vibration intensity inside the vehicle exceeds 70dB, more than 60% of susceptible people will experience ear pressure and dizziness within 15 minutes. Such vibration frequency is extremely low and cannot be clearly captured by the human ear, but the inner ear vestibular system is extremely sensitive to this frequency band vibration, equivalent to continuous interference to the balance sensor. Prolonged stimulation will cause symptoms such as dizziness, ear pressure, and headache.
Some pure electric vehicle owners reported that they frequently experienced unexplained headaches in the first few months after purchasing the vehicle. No organic lesions were found in medical examinations. Subsequently, the symptoms gradually缓解 after operations such as full vehicle sound insulation and adjustment of chassis bushings. The root cause is the impact of low-frequency vibration.
03 Misconceptions about Motion Sickness in Electric Vehicles: The Truth
There are many false rumors about motion sickness in pure electric vehicles on the internet. The most widely spread one is that "excessive radiation from electric vehicles causes dizziness, hair loss, and affects health", which has no scientific basis.
The radiation generated by pure electric vehicles belongs to non-ionizing radiation, the same type as the radiation generated by mobile phones, WiFi, and microwave ovens. It has extremely low energy and will not damage the DNA structure of human cells, having no negative impact on health.
China has clear national standard requirements for electromagnetic radiation from pure electric vehicles. All pure electric models sold on the market need to pass the test of GB 8702-2014 "Electromagnetic Environmental Control Limits", and the radiation level is far below the safety threshold. Previous measured data from domestic authoritative testing institutions on mainstream pure electric models show that the radiation value inside the cockpit is only about 0.05μT, while the radiation value of a daily household hair dryer in operation is about 10μT, far higher than the radiation level inside the vehicle. Consumers do not need to be anxious about this. Online rumors such as "riding electric vehicles causes hair loss and affects fertility" have no scientific support and should not be believed.
Another common misconception is that "high-priced pure electric vehicles will not cause motion sickness". This statement has some rationality but is not absolute. High-end pure electric models usually invest more cost in optimizing riding comfort. For example, tuning acceleration logic to simulate the linear acceleration feeling of fuel-powered vehicles, setting multiple adjustable kinetic energy recovery gears or even supporting pure coasting mode, and equipping active noise reduction systems and adding sound insulation and vibration isolation materials to reduce the impact of low-frequency resonance. These measures can indeed significantly reduce the probability of motion sickness.
However, for operational pure electric vehicles such as ride-hailing and taxis, in consideration of maximizing续航, they usually set kinetic energy recovery to the highest gear and will not enable settings that牺牲续航 such as comfort mode. Therefore, even if the model is priced high, discomfort may still be obvious when riding.
04 Countermeasures for Motion Sickness in Electric Vehicles
For people prone to motion sickness reactions, the following four types of methods can effectively reduce the probability of discomfort:
Prioritize front seat seating: The front seat has a wider field of vision, allowing clear observation of road conditions ahead and advance prediction of vehicle acceleration and deceleration actions. This keeps visual signals synchronized with vestibular signals and can reduce the incidence of motion sickness by more than 50%.
Avoid looking at electronic devices during the ride: When looking down at mobile phones, tablets and other devices, the visual system will send a signal of "the body is in a stationary state" to the brain, further exacerbating signal mismatch in the central nervous system. When riding, try to look up at distant scenery ahead to allow the visual system to clearly transmit motion signals, which can effectively缓解 discomfort. If obvious nausea and dizziness symptoms have already appeared, pull over and take a short break. In a standing position, the balance perception system can quickly complete signal calibration, and discomfort usually缓解 within 5-10 minutes.
Communicate driving habits with the driver in advance: After getting on the bus, inform the driver that you are prone to motion sickness and ask him to drive smoothly. If conditions permit, ask the driver to set kinetic energy recovery to a low gear to reduce the occurrence of unpredictable drag.
Equip with缓解类物品: Carry items such as mints, essential balm, and motion sickness patches. When dizziness symptoms appear, take a mint or apply essential balm on the temples to effectively缓解 nausea.适当开窗通风 during the ride, as fresh air can also减轻 head swelling and stuffiness.
Currently, the domestic new energy vehicle industry has carried out systematic optimization for the motion sickness problem in pure electric vehicles. As of 2024, more than 12 domestic car companies have included "motion sickness prevention optimization" in the core indicators of vehicle research and development. Many pure electric models launched in the past two years have specially set "comfort mode" and "motion sickness prevention mode", tuning acceleration and deceleration logic and kinetic energy recovery strategies for people prone to motion sickness. Some models are also equipped with active suspension and active low-frequency noise reduction systems to further reduce the impact of dynamic shocks and resonance. With continuous technological iteration, the riding comfort of pure electric vehicles will continue to improve, and the motion sickness problem will be fundamentally solved.
