CN211892872U

CN211892872U - Range-extending type electric automobile

Info

Publication number: CN211892872U
Application number: CN201922230355.0U
Authority: CN
Inventors: 江涛; 张勇; 张珊珊
Original assignee: Chery and Wanda Guizhou Bus Co Ltd
Current assignee: Chery and Wanda Guizhou Bus Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-10
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses an increase form electric automobile, including electric automobile, electric automobile is last to install auxiliary power unit, and auxiliary power unit is connected to generator controlgear and vehicle control unit, and generator controlgear is connected to DCDC conversion module and driving motor controller, and auxiliary power unit adopts generating set. The utility model discloses increase form electric automobile has increased the electric vehicle of auxiliary power unit (AP U) on pure electric vehicles's basis, and auxiliary power unit opens when vehicle demand power is big or the continuation of journey mileage needs extension, the utility model discloses the battery capacity of increase form car approximately accounts for pure electric vehicles' 30% ~40%, greatly reduced whole car driving system cost, and then reduced the cost of manufacture and the use cost of whole car, is equipped with auxiliary power unit simultaneously and can avoids the driver to the worry of the mileage of traveling.

Description

Range-extending type electric automobile

Technical Field

The utility model relates to an increase form electric automobile belongs to electric automobile technical field.

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. To reduce CO₂And dependence on fossil fuels, automakers 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 to-be-solved technical problem of the utility model is: the extended range electric automobile is 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 utility model discloses the technical scheme who takes does: 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.

The utility model has the advantages that: compared with the prior art, the utility model discloses the battery capacity of extended range formula car accounts for about 30% ~40% of pure electric automobile, greatly reduced whole car driving system cost, and then reduced the cost of manufacture and the use cost of whole car, it can avoid the driver to the worry of mileage of traveling to have equipped with auxiliary power unit simultaneously.

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 present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1: as shown in fig. 1-5, an extended range electric vehicle is composed of an electric power steering system (EPS) 1, an electric vacuum pump 2, a vehicle instrument 3, other electric accessories 4, a 12V dc power supply 5, a Battery Management System (BMS) 6, a power battery pack 7, an oil tank 8, a DCDC 9, a driving Motor Controller (MCU) 10, a generator control device (GCU) 11, a radiator i 12, a driving motor 13, a main reducer 14, an Auxiliary Power Unit (APU) 15, a compressor 16, a radiator ii 17, and a Vehicle Control Unit (VCU) 18, wherein the electric vehicle is provided with an auxiliary power unit 15, the auxiliary power unit 15 is connected to the generator control device 11 and the vehicle control unit 18, the generator control device 11 is connected to the DCDC conversion module 9 and the driving motor controller 10, and the auxiliary power unit 15 is a generator set; 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.

The utility model discloses the structure of range extending electric automobile is similar with the serial-type car, the difference still installed on-vehicle charging device outside group battery and driving motor and APU, make range extending electric automobile can utilize the electric wire netting to charge, so the range extending electric automobile will preferentially use low-priced electric energy drive, when needing extra power to supply, turn on generating set, and make the engine work in the best operating point, drive the generator work, the mechanical energy of output passes through power converter, convey to motor or power battery, give full play to its advantage, in the driving process, by vehicle control unit analysis footboard aperture signal, gear signal and key switch signal lamp, discern driver's intention, low-voltage circuit closes, attachment power-on work such as MCU control EPS; the high-voltage circuit is electrified, the output of the driving motor is controlled through the MCU, when the electric quantity of the power battery is insufficient, the vehicle control unit sends out a signal, and the ECU and the MCU output expected torque and current to work in a range extending mode.

The power system of the extended range electric automobile has more parts, an APU and an oil tank are added compared with a pure electric automobile, and a power battery pack is added compared with a traditional automobile, so that more consideration factors are taken for the whole automobile arrangement, including the vibration of the APU, the safety and heat management of the power battery, the maintenance problem, the distribution of the axle load and the like. As shown in fig. 1, the power battery pack 7 is installed on the electric vehicle under the passenger seat at a distance from the cabin. Where maintenance and heat dissipation are facilitated.

Preferably, the auxiliary power unit 15 is installed in the rear compartment of the electric vehicle and is equipped with a radiator 12 on one side, although the engine operates in a high efficiency region, but its vibration problem is not negligible, and thus it is placed in the rear compartment of the passenger car and is equipped with a radiator.

Example 2: 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.

In order to fully utilize electric energy and reasonably distribute power, the driving motor and the engine are enabled to operate in a high-efficiency area, and the range-extended mode of the range-extended electric automobile comprises a battery pack independent 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.

As shown in fig. 2, the battery pack is in an individual driving mode, i.e., a pure electric driving mode, at this time, the electric quantity of the battery can meet the power and energy requirements of the entire vehicle, the auxiliary power unit does not work, the electric energy is transmitted to the driving motor and converted into mechanical energy, and the mechanical energy reaches the wheels through the transmission system, and the entire vehicle runs with low noise and stable in the pure electric driving mode, which completely meets the requirements of the current city on new energy vehicles, so the running proportion of the battery pack in the individual driving mode in the entire driving mode should be increased, and the electric energy in the power grid is utilized to run.

As shown in fig. 3, the auxiliary power unit is driven in common with the battery pack: when the traction power of the whole vehicle is larger than a set value, the power battery is limited by the electric quantity or the output current of the power battery, the overload output influences the service life of the battery, the traction power at the moment is provided by the auxiliary power unit and the power battery pack together, 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, the auxiliary power unit and the power battery pack are driven together, the battery over-discharge can be avoided, and the fuel consumption of the APU can be reduced by selecting proper total equivalent at the starting time.

As shown in fig. 4, auxiliary power unit drive and charge mode: the operation mode fully embodies the advantages of two sets of power systems of the extended-range automobile compared with a pure electric automobile, when the electric quantity of a battery pack is close to the lower limit or a battery fails, the APU serves as a main power source to drive the whole automobile to run, and the mode has the defect of secondary energy conversion, namely chemical energy of fuel is transmitted to the battery by the APU firstly and then is transmitted to a driving motor and converted into mechanical energy. In order to overcome the defect, on the basis of selecting the optimal working mode of the engine, the operation proportion of the auxiliary power unit and the battery pack in the common driving mode in the whole driving mode is reduced as much as possible so as to reduce the secondary conversion of energy.

As shown in fig. 5, the regenerative energy recovery mode: according to the running working condition of the automobile, the automobile can be frequently decelerated and stopped in a city, the recovered energy at the moment has important significance for saving energy, the energy is recovered, the auxiliary power unit is closed, the traction motor works, the power recovery device 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 above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

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.