On-line electric vehicle (OLEV) system capable of controlling energy output based on sensor

The invention discloses an on-line electric vehicle (OLEV) system capable of controlling energy output based on a sensor. The OLEV system comprises an underground charging device embedded underground and a vehicle-mounted receiving device arranged on the vehicle. The underground charging device comprises an electric energy control module, an electric energy output module, a vehicle position detection module and a driving module. According to the detected vehicle position, when the vehicle drives to the position where the underground charging device is embedded, the electric energy control module transmits the electric energy through the electric energy output module and controls the underground charging device to move along with the vehicle along a rail through the driving module. The vehicle-mounted receiving device comprises an electric energy picking module and a battery charging module which is used for conducting charging management on a vehicle-mounted battery. When it is detected that the electric quantity of the vehicle-mounted battery is larger than the rated capacity, charging to the vehicle-mounted battery is stopped. By the adoption of the OLEV system, the underground charging device is made to move along with the electric vehicle, the cost for building the underground charging device is reduced, reasonable charging is conducted by sensing the electric quantity of the vehicle-mounted battery, and the over-charging problem of the vehicle-mounted battery is solved.