BYD Megawatt Flash Charger used as playground swing sparks infrastructure safety concerns

Video footage of two young children using the suspended liquid-cooled cables of an operational BYD Megawatt Flash Charging station as playground swings went viral across Chinese social media during the National Day holiday, raising concerns about public infrastructure safety and high-power charging ergonomics.

The incident occurred on October 2, 2026, at an open-access public charging forecourt in Nanning, Guangxi Zhuang Autonomous Region. The recording shows the children gripping the charging connectors and swinging with their feet off the ground while adults filmed.

BYD customer service confirmed on October 4 that playing on charging equipment is strictly prohibited. The automaker said maintenance personnel had been dispatched to inspect the Nanning site and that it would tighten station monitoring and physical inspections.

Why the charger uses an overhead cable

The station features the BYD Megawatt Flash Charger, a high-power terminal unveiled alongside the brand’s e-Platform in March 2025. Engineered around a 1,000V high-voltage architecture, the system supports peak charging rates up to 10C for compatible passenger models, delivering 1,000 kW (1 MW) at 1,000V and 1,000A, with a theoretical hardware envelope reaching 1,500 kW at 1,500A.

To manage the weight of liquid-cooled high-amperage lines, BYD mounts the assembly on an overhead T-track equipped with a spring-loaded retractor. The suspension bears the line’s weight, keeping the connector accessible at chest level while preventing the cable from dragging across dirty or wet ground.

However, the overhead geometry can act as a pendulum when misused. With a connector gun weighing between 3.0 kg and 5.0 kg suspended from the overhead rail, a child swinging from the line places dynamic forces on the mechanism that differ substantially from standard single-operator handling.

The bigger risk is mechanical damage.

While initial public reactions focused on immediate electrocution hazards, established safety interlocks limit electrical risk in standby mode. Under China’s conductive charging standards (GB/T 18487.1 and GB/T 20234), the station’s main DC contactors remain open and de-energised while the gun is docked. High-voltage energy engages only after the connector physically couples to a vehicle and the required locking, control-pilot and communication checks are completed.

The more relevant engineering concern is latent structural fatigue. Retractor arms, internal cable glands, and connector strain-relief joints are designed for normal handling loads, not cyclic pendulum stress. Dynamic swing loading generates repeated transverse forces around the connector and suspension assembly.

Unlike standard air-cooled charging lines, liquid-cooled megawatt cables contain a multi-layer composite structure beneath their outer jacket: flexible high-amperage copper conductors, communication lines, and internal coolant channels. Repeated bending or transverse loading could damage these internal components or the protective-earth (PE) conductor without necessarily producing visible external damage.

Such internal degradation could create a safety issue for a subsequent charging session, particularly when the cable is exposed to the high currents associated with megawatt charging. The heavy suspended gun also presents a direct blunt-impact hazard if an operator or child loses grip during a swing.

Testing standards amid rapid expansion

The Nanning event highlights a potential gap between laboratory abuse standards and public-space behaviour. Active Chinese standards, including GB/T 18487.1 and GB/T 20234, mandate mechanical checks such as 5,000 N vehicle drive-over compression and linear tensile pulls between 200 N and 400 N. However, these tests address defined static or impact conditions rather than repeated, high-amplitude pendulum loading of overhead suspension systems.

The issue comes as BYD expands its charging network. The company has surpassed 10,000 operational Megawatt Flash Charging stations in China and is progressing toward a domestic target of 20,000 by the end of 2026. Internationally, BYD plans 6,000 flash charging stations by the end of 2027, including 3,000 in the European Union and 300 in the United Kingdom.

Many high-power charging sites operate in open commercial environments and can incorporate local battery energy storage systems (BESS) to manage grid demand. As megawatt-class charging moves into increasingly accessible public locations, cable-management systems must contend not only with normal driver use but also with foreseeable misuse of exposed hardware.