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With the smart development of cities, various outdoor temporary power usage scenarios are on the rise. At the same time, the demand for continuous power supply in these scenarios is also increasing. To meet these needs, mobile energy storage vehicles have been developed. The key purpose of mobile energy storage vehicles is to ensure the continuous operation of various electrical devices in power-consuming scenarios; even in the event of a failure in the main power supply, it is possible to switch seamlessly to the energy storage power supply system. And depending on the different electrical usage scenarios, there are a wide variety of electrical devices. Many of these devices are highly sensitive to fluctuations in grid voltage; for example, various motors, and the AC contactors in control circuits will stop operating due to voltage drops of 40–50 ms ； Various gas discharge lamps, including high-pressure halogen lamps, high-pressure sodium lamps, and LED lamps, can also be affected by voltage dips of 30–40 ms, which can disrupt their normal operation ； There are also various computing storage devices; when the voltage drops below 60%, this condition, lasting for 40–50 ms, will cause the device to shut down. To address the aforementioned switching issues, the traditional solution involves using an ATS mechanical dual-power switching switch to enable rapid switching between primary and backup power systems. However, due to inherent limitations in its principle and structure, the maximum switching speed achievable with this solution is approximately 100 ms. Clearly, this speed fails to meet the requirements for uninterrupted operation of various loads that are becoming increasingly sensitive to voltage fluctuations. Many manufacturers of mobile energy storage units in the East China region are also actively seeking suitable switching solutions. Recently, Nanjing Guogao Electric was commissioned by several automobile companies to develop appropriate solutions. Leveraging its expertise in 1000A-class high-current static switching switch technology, the Guogao Electric project team took full account of the requirements of the operating environment for vehicle-mounted energy storage systems. Through laboratory simulations, they developed a high-power static switching solution suitable for such systems. The key technologies employed include rapid curve fitting for identification, handling of dynamic response impacts, and maintenance of thermal power balance, all of which enable fast and seamless switching between different power sources in the power supply network and energy storage system. The system's appearance and structure are as shown in the figure below. file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps14.jpg file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps15.png For rapid switching of the system, semiconductor thyristors or IGBTs are used. When the energy storage power unit is deployed at the site and connected to the external mains supply, this becomes the power source shown in the diagram. During normal operation, the device is powered by this mains supply; at the same time, the onboard backend system sends a standby command to the static switch, which then automatically switches to standby mode, waiting for a quick switch between the mains supply and the battery pack. When there is a power outage or voltage fluctuations in the mains supply, the device automatically switches to being powered by the battery pack (i.e., the backup power source), with the switching time being less than 5 ms, thus ensuring the proper operation of the connected loads. When the battery pack of the power car has too little charge, a charging command is sent to the static switch via the vehicle’s onboard system; the static switch then automatically switches to charging mode, allowing mains electricity to charge the battery. When charging is complete, a shutdown command is sent to the static switch via the vehicle’s backend system; the static switch then automatically switches to shutdown mode, waiting for the next command. file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps16.png file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps17.png The current voltage levels currently available include 200A, 400A, 800A, 1000A, 1200A, etc. Different capacity configurations correspond to different cabinet units, offering advantages such as flexible configuration, high reliability, seamless switching, and easy maintenance. These features provide reliable core functionality support for large-capacity new energy storage systems in the future.