阅读说明：本技术 一种增程式电动汽车和驱动控制方法 (Range-extending electric automobile and drive control method ) 是由 江涛 张勇 张珊珊 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种增程式电动汽车和驱动控制方法,包括电动汽车,电动汽车上安装有辅助动力单元,辅助动力单元连接到发电机控制设备和整车控制器,发电机控制设备连接到DCDC转换模块和驱动电机控制器,辅助动力单元采用发电机组。本发明增程式电动汽车是在纯电动汽车的基础上增加了辅助动力单元(A P U)的电动车辆,辅助动力单元在车辆需求功率大或者续驶里程需要延长时开,本发明增程式汽车的电池容量大约占纯电动汽车的30%~40%,大大降低了整车动力系统成本,进而降低整车的制作成本与使用成本,同时配备了辅助动力单元可避免驾驶员对行驶里程的担忧。(The invention discloses an extended range electric automobile and a drive control method, wherein the extended range electric automobile comprises an electric automobile body, an auxiliary power unit is arranged on the electric automobile body, the auxiliary power unit is connected to a generator control device and a vehicle control unit, the generator control device is connected to a DCDC conversion module and a drive motor controller, and the auxiliary power unit adopts a generator set. The range-extended electric vehicle is an electric vehicle added with an Auxiliary Power Unit (APU) on the basis of a pure electric vehicle, the auxiliary power unit is started when the required power of the vehicle is high or the driving range needs to be extended, the battery capacity of the range-extended electric vehicle accounts for about 30-40% of that of the pure electric vehicle, the cost of a power system of the whole vehicle is greatly reduced, the manufacturing cost and the using cost of the whole vehicle are further reduced, and meanwhile, the auxiliary power unit is arranged to avoid worry of a driver about the driving range.)

1. An extended range electric automobile which characterized in that: the electric vehicle is provided with an auxiliary power unit (15), the auxiliary power unit (15) is connected to a generator control device (11) and a vehicle control unit (18), the generator control device (11) is connected to a DCDC conversion module (9) and a driving motor controller (10), and the auxiliary power unit (15) adopts a generator set.

2. The extended range electric vehicle of claim 1, wherein: the auxiliary power unit (15) is also connected to the power battery pack (7) through an onboard charging device, and the power battery pack (7) is connected to the battery management system (6) and the drive motor controller (10).

3. The extended range electric vehicle of claim 1, wherein: the power battery pack (7) is arranged below a passenger seat on the electric automobile and is away from the cockpit by a certain distance.

4. The extended range electric vehicle of claim 1, wherein: the auxiliary power unit (15) is arranged in the rear cabin of the electric automobile, and a first radiator (12) is arranged beside the auxiliary power unit.

5. The drive control method of the extended range electric vehicle according to any one of claims 1 to 4, characterized in that: the method comprises the following steps: the electric automobile is charged by utilizing a power grid, electric energy is preferentially used for driving, when additional power supplement is needed, a generator set of an auxiliary power unit is started for power supplement, an engine works at the optimal working point to drive a generator to work, output mechanical energy is transmitted to a motor or a power battery pack through a power converter, in the driving process, a whole automobile controller analyzes a pedal opening degree signal, a gear signal and a key switch signal lamp to identify the intention of a driver, a low-voltage circuit is closed, and the motor controller is driven to control the electric steering system to be powered on and work; the high-voltage circuit is electrified, the output of the driving motor is controlled through the driving motor controller, when the electric quantity of the power battery pack is insufficient, the vehicle control unit sends a signal, the traveling crane computer and the driving motor controller output expected torque and current, and the electric vehicle works in a range extending mode.

6. The drive control method of the extended range electric vehicle according to claim 5, characterized in that: the range extending mode comprises a battery pack single driving mode, an auxiliary power unit and battery pack common driving mode, an auxiliary power unit driving and charging mode and a regenerated energy recovery mode.

7. The drive control method of the extended range electric vehicle according to claim 6, characterized in that: the battery pack single driving mode is a pure electric driving mode, at the moment, the electric quantity of the battery can meet the power and energy requirements of the whole vehicle, the auxiliary power unit does not work, the electric energy is transmitted to the driving motor and converted into mechanical energy, the mechanical energy reaches wheels through the transmission system, and the running proportion of the battery pack single driving mode in the whole driving mode is increased.

8. The drive control method of the extended range electric vehicle according to claim 6, characterized in that: auxiliary power unit and battery pack common driving mode: when the traction power of the whole vehicle is larger than a set value, the traction power is provided by the auxiliary power unit and the power battery pack together, and the electric energy output by the auxiliary power unit and the energy output by the power battery pack are coupled through the transmission device and transmitted to the motor.

9. The drive control method of the extended range electric vehicle according to claim 6, characterized in that: auxiliary power unit and battery pack common driving mode: auxiliary power unit drive and charging mode: when the electric quantity of the battery pack is close to the lower limit or the battery fails, the APU serves as a main power source to drive the whole vehicle to run, and the running proportion of the auxiliary power unit and the battery pack in the whole driving mode is reduced.

10. The drive control method of the extended range electric vehicle according to claim 6, characterized in that: regenerative energy recovery mode: when the automobile is decelerated and stopped, energy recovery is carried out, the auxiliary power unit is closed, the traction motor works and is equivalent to a generator, the generated electric power supplies power to the power battery pack, and the mechanical energy recovered by braking is converted into electric energy to be stored in the battery.

Technical Field

The invention relates to a range-extending type electric automobile and a drive control method, and belongs to the technical field of electric automobiles.

Background

Under the dual challenges of energy and environmental issues, the development of new energy automobiles becomes the development direction of automobile industries of various countries. In order to reduce CO2 emissions and the reliance on fossil fuels, automobile manufacturers have focused their attention on electric vehicles. Pure electric vehicles is a clean car in the true sense, and pure electric vehicles has several advantages over traditional cars: the method has the advantages of small pollution, low noise and high light weight of the whole vehicle. However, the capacity and cost bottlenecks of the battery at the present stage cannot be broken through, so that the electric vehicle cannot be widely popularized. The reason why consumers do not choose to purchase pure electric vehicles is that mileage anxiety has a high proportion.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the extended range electric automobile and the drive control method are provided to overcome the defects of limited power battery capacity and unsatisfactory continuous mileage of a pure electric automobile and realize smooth transition from a fuel automobile to the pure electric automobile.

The technical scheme adopted by the invention is as follows: the utility model provides an increase form electric automobile, includes electric automobile, installs auxiliary power unit on the electric automobile, and auxiliary power unit is connected to generator control equipment and vehicle control unit, and generator control equipment is connected to DCDC conversion module and driving motor controller, and auxiliary power unit adopts the generating set.

Preferably, the auxiliary power unit is further connected to a power battery pack through an onboard charging device, the power battery pack being connected to the battery management system and the drive motor controller.

Preferably, the power battery pack is arranged below a passenger seat on the electric automobile and is at a distance from the cockpit.

Preferably, the auxiliary power unit is installed in a rear cabin of the electric automobile, and a first radiator is installed beside the auxiliary power unit.

A drive control method of an extended range electric vehicle comprises the following steps: the electric automobile is charged by utilizing a power grid, electric energy is preferentially used for driving, when additional power supplement is needed, a generator set of an auxiliary power unit is started for power supplement, an engine works at the optimal working point to drive a generator to work, output mechanical energy is transmitted to a motor or a power battery pack through a power converter, in the driving process, a whole automobile controller analyzes a pedal opening degree signal, a gear signal and a key switch signal lamp to identify the intention of a driver, a low-voltage circuit is closed, and the motor controller is driven to control the electric steering system to be powered on and work; the high-voltage circuit is electrified, the output of the driving motor is controlled through the driving motor controller, when the electric quantity of the power battery pack is insufficient, the vehicle control unit sends a signal, the traveling crane computer and the driving motor controller output expected torque and current, and the electric vehicle works in a range extending mode.

The range extending mode comprises a battery pack single driving mode, an auxiliary power unit and battery pack common driving mode, an auxiliary power unit driving and charging mode and a regenerated energy recovery mode.

The battery pack single driving mode is a pure electric driving mode, at the moment, the electric quantity of the battery can meet the power and energy requirements of the whole vehicle, the auxiliary power unit does not work, the electric energy is transmitted to the driving motor and converted into mechanical energy, the mechanical energy reaches wheels through the transmission system, and the running proportion of the battery pack single driving mode in the whole driving mode is increased.

Auxiliary power unit and battery pack common driving mode: when the traction power of the whole vehicle is larger than a set value, the traction power is provided by the auxiliary power unit and the power battery pack together, and the electric energy output by the auxiliary power unit and the energy output by the power battery pack are coupled through the transmission device and transmitted to the motor.

Auxiliary power unit and battery pack common driving mode: auxiliary power unit drive and charging mode: when the electric quantity of the battery pack is close to the lower limit or the battery fails, the APU serves as a main power source to drive the whole vehicle to run, and the running proportion of the auxiliary power unit and the battery pack in the whole driving mode is reduced.

Regenerative energy recovery mode: when the automobile is decelerated and stopped, energy recovery is carried out, the auxiliary power unit is closed, the traction motor works and is equivalent to a generator, the generated electric power supplies power to the power battery pack, and the mechanical energy recovered by braking is converted into electric energy to be stored in the battery.

The range-extended electric automobile is an electric automobile added with an Auxiliary Power Unit (APU) on the basis of a pure electric automobile, wherein the auxiliary power unit is started when the required power of the automobile is high or the driving range needs to be extended.

The invention has the beneficial effects that: compared with the prior art, the battery capacity of the extended range type automobile accounts for about 30-40% of that of a pure electric automobile, the cost of a power system of the whole automobile is greatly reduced, the manufacturing cost and the using cost of the whole automobile are further reduced, and meanwhile, the auxiliary power unit is equipped to avoid worrying about the driving mileage of a driver.

Drawings

FIG. 1 is a schematic diagram of the control principle of the present invention;

FIG. 2 is a diagram showing a mode of driving the battery pack alone;

FIG. 3 is a diagram of the mode of common driving of the APU and the battery pack;

FIG. 4 is a diagram of an APU drive and charging mode;

fig. 5 is a regenerative energy recovery pattern diagram.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.