Abstract: The large electric wheel truck has a large loading mass and contains a lot of potential ener⁃ gy and kinetic energy. When the vehicle brakes downhill，this part of energy is consumed in the form of heat energy on the brake resistor grid. The field actual measurement shows that this part of energy accounts for about 25% of the total energy consumption. Therefore，the recovery and utilization of brake energy has great economic value. According to the characteristics of the electric drive system of large electric wheel trucks，in order to efficiently recover and utilize the braking energy，a scheme of adding bidirectional DC/ DC and lithium titanate batteries to the main circuit is proposed. Through the energy coordinated control strategy based on power following and bus voltage regulation of the vehicle control system，the generator and battery pack are used as the main energy sources to follow the target demand power of the vehicle dur⁃ ing the energy control process. The DC bus voltage is adjusted by the generator set and high-power DC/ DC，so that the vehicle can automatically adjust the appropriate bus voltage according to the driving condi⁃ tions. This control scheme ensures that the vehicle has sufficient driving power，while realizing the recov⁃ ery and utilization of vehicle braking energy，reducing the fuel consumption of the engine，and improving the reliability of the vehicle braking system.

Key words: lithium titanate battery, electric wheel truck , braking energy , recovery and utilization, co? operative control