A composite energy storage system based on a stepless speed change type flywheel and a power battery is characterized in that the composite energy storage system can be controlled to operate in different working modes according to different automobile operation working conditions, and the requirements of an automobile for high power density, high energy density, high energy conversion efficiency and long service life of the energy storage system can be met at the same time. Under the starting condition of the vehicle, the discharge current of the power battery can be reduced and the service life of the power battery system can be prolonged by virtue of the high-power density advantage of the stepless speed change type flywheel; under medium-high driving demand power, the composite energy storage system works in a dual-energy supply mode, and by means of the advantage of high power density based on the stepless speed change type flywheel, the power demand of the whole vehicle can be met, large-current discharge of a power battery can be prevented, the service life of the power battery is prolonged, and the working efficiency of the system is improved; under low driving demand power,based on the fact that the stepless speed change type flywheel does not participate in whole vehicle driving, the whole vehicle controller controls the electric energy output by the power battery tobe converted into mechanical energy through the motor at the same time, and then part of the remaining mechanical energy obtained after whole vehicle driving is met is transmitted to the flywheel so as to control the stepless speed change type flywheel to operate in an efficient state; and under the emergency braking working condition, by means of the advantage of instantaneous high-power feedbackbased on the stepless speed change type flywheel, more braking energy can be fed back compared with a conventional single-power-battery energy storage system, the energy utilization efficiency of thewhole vehicle is improved, large-current charging of a power battery can be prevented, and the service life of the power battery is prolonged.
一种基于无级变速式飞轮与动力电池的复合储能系统,其特征在于可以根据不同的汽车运行工况,控制复合储能系统运行于不同的工作模式,可以同时满足汽车对储能系统的高功率密度、高能量密度、高能量转换效率和长使用寿命的要求。车辆起步工况下,借助基于无级变速式飞轮高功率密度优势,能够降低动力电池的放电电流,延长动力电池系统的使用寿命;中高驱动需求功率下,复合储能系统工作于双能源供给模式,借助基于无级变速式飞轮高功率密度优势,不仅可满足整车功率需求,而且可防止动力电池大电流放电,延长其使用寿命,并提高系统工作效率;低驱动需求功率下,基于无级变速式飞轮不参与整车驱动,整车控制器同时控制动力电池输出的电能经电动机转化为机械能后,将满足整车驱动后剩下的一部分机械能传递给飞轮,以控制基于无级变速式飞轮运行于高效状态;紧急制动工况下,借助基于无级变速式飞轮瞬时高功率回馈优势,可回馈比常规单一动力电池储能系统更多的制动能量,提高整车能量利用效率,还可以可防止动力电池大电流充电,延长其使用寿命。
Composite energy storage system based on stepless speed change type flywheel and power battery
一种基于无级变速式飞轮与动力电池的复合储能系统
2020-09-18
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
European Patent Office | 2021
|COAXIAL TYPE POWER-ASSISTED STEPLESS SPEED CHANGE DEVICE
European Patent Office | 2019
|