The Research Of Composite Batteries Control System Of Hybrid Electric Armored Vehicles

Hybrid electric armored vehicles can create an opportunity for electromagnetic weapons on future armored vehicles, in addition to its better mobility, better stability and better concealment. Due to all this characteristics, the battlefield survivability of armored vehicles is improved, and hybrid electric armored vehicles will become the future direction of armored vehicles. Regenerative braking is one of the most important features of hybrid vehicle armored vehicles.The paper mainly research into regenerative braking control system base on composite batteries, which is composed by Ni-MH battery and flywheel battery. Firstly, background of research, profile of hybrid electric armored vehicles and profile of regenerative braking system are introduced. Secondly, characteristics of Ni-MH battery is analyzed, model of it is built and simulation is done to verify its characteristics. It comes out with a conclusion that what range of SOC and power of Ni-MH battery is suit for charge and discharge. Then, taking stainless steel and composite material (graphite whisker) as example for comparison, a set of parameters is blocked out, according to the material of flywheel. High-speed flywheel battery system is designed base on the parameters, and its process of charge and discharge is analyzed. A conclusion is draw that region of charge and discharge of flywheel battery is wider than Ni-MH battery and limiting conditions is less than Ni-MH battery. A model of four-wheel independent drive off-road vehicles is designed base on Dong-Feng armored SUV. Regenerative braking control strategy and composite battery control strategy is proposed. Using MATLAB/SIMLINK simulation software, control model of energy recycle in the process of regenerative braking is established. According to the simulation, regenerative braking of hybrid electric armored vehicles is more efficient and safer. It is clear that flywheel battery is not only suit for special purpose of hybrid electric armored vehicles, but also suit for recycling energy while regenerative braking.In order to ensure the operation and power supply demand of the vehicles, Ni-MH battery will be still in place, though flywheel battery has so many advantages. These two batteries is combined into a composite battery. In the process of regenerative braking, on the one hand, energy should be recycled as much as possible, on the other hand, the battery should be protect for its long term use, as long as the vehicle is in safe state. A reasonable control strategy is needed which is the goal of this paper.