阅读说明：本技术 一种纯电动汽车能量管理控制系统 (Energy management control system of pure electric vehicle ) 是由 周稼铭 何洪文 魏中宝 董鹏 衣丰艳 胡东海 衣杰 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种纯电动汽车能量管理控制系统,其中,包括能量管理控制器、电池组、电机、整车控制器和控制终端；能量管理控制器内设有温度传感器；能量管理控制器分别与电池组、电机、整车控制器和超级电容连接；电池组和超级电容均通过一主继电器与电机连接；主继电器与能量管理控制器连接；能量管理控制器用于获取电池组的电池温度、电池组的输出电压和电池组的输出电流,获取超级电容的输出电压和输出电流；能量管理控制器还用于获取控制终端的输入指令,通过整车控制器获取车辆的行驶状态,并根据输入指令及车辆的行驶状态控制主继电器的工作状态；以使选择合适的驱动策略。本发明能够大大节约能量。(The invention discloses an energy management control system of a pure electric vehicle, which comprises an energy management controller, a battery pack, a motor, a vehicle control unit and a control terminal, wherein the battery pack is connected with the energy management controller; a temperature sensor is arranged in the energy management controller; the energy management controller is respectively connected with the battery pack, the motor, the vehicle control unit and the super capacitor; the battery pack and the super capacitor are both connected with the motor through a main relay; the main relay is connected with the energy management controller; the energy management controller is used for acquiring the battery temperature of the battery pack, the output voltage of the battery pack and the output current of the battery pack, and acquiring the output voltage and the output current of the super capacitor; the energy management controller is also used for acquiring an input instruction of the control terminal, acquiring the running state of the vehicle through the vehicle control unit, and controlling the working state of the main relay according to the input instruction and the running state of the vehicle; so that the appropriate drive strategy is selected. The invention can greatly save energy.)

1. The energy management control system of the pure electric vehicle is characterized by comprising an energy management controller, a battery pack, a motor, a vehicle control unit and a control terminal;

a temperature sensor is arranged in the energy management controller;

the energy management controller is respectively connected with the battery pack, the motor, the vehicle control unit and the super capacitor;

the battery pack and the super capacitor are connected with the motor through a main relay; the main relay is connected with the energy management controller;

the energy management controller is used for acquiring the battery temperature of the battery pack, the output voltage of the battery pack and the output current of the battery pack, and acquiring the output voltage and the output current of the super capacitor;

the energy management controller is further used for acquiring an input instruction of the control terminal, acquiring the running state of the vehicle through the vehicle control unit, and controlling the working state of the main relay according to the input instruction and the running state of the vehicle; so that the appropriate drive strategy is selected.

2. The energy management control system of the pure electric vehicle according to claim 1, wherein the motor comprises an electric control controller and a direct-current brushless motor, the motor controller is electrically connected with the main relay, and the motor controller is connected with the direct-current brushless motor; the motor controller is electrically connected with the energy management controller;

and the direct current brushless motor is used for driving a vehicle to run or generate power according to the working state of the main relay and the control signal of the energy management controller.

3. The energy management system of the pure electric vehicle as claimed in claim 1, wherein the main relay has four working states, in a first working state, the battery pack is electrically connected with the motor through the main relay, and the super capacitor is disconnected with the motor; in a second working state, the battery pack is disconnected with the motor, and the super capacitor is connected with the motor; in a third working state, the battery pack is connected with the motor through the main relay, and the super capacitor is connected with the motor; and under a fourth working state, the battery pack is disconnected with the motor, and the super capacitor is disconnected with the motor.

4. The pure electric vehicle energy management system of claim 3, further comprising a DC/DC converter and an IGBT driver electrically connected to the energy management controller and the DC/DC converter, respectively; the DC/DC converter is connected in series between the super capacitor and the main relay; the IGBT driver is used for acquiring a control signal from the energy management controller, and converting the voltage of the super capacitor into corresponding voltage through the DC/DC converter or converting the electric energy generated by the motor into corresponding voltage according to the control signal so as to charge the super capacitor.

5. A pure electric vehicle energy management system according to claim 3 or 4, characterized in that the energy management controller is electrically connected with the main relay, and the energy management controller is used for controlling the working state of the main relay.

6. A pure electric vehicle energy management system according to claim 3 or 4, characterized in that, in the absence of a braking signal: when the acquired battery pack voltage is greater than 48.6V, controlling the main relay to be in a first working state; when the acquired battery pack voltage is between 45V and 48.6V, controlling the main relay to be in a third working state; when the voltage of the battery pack is between 25V and 45V, controlling the working state of the main relay according to the vehicle speed and the acceleration;

in the presence of a brake signal: and controlling the main relay to be in a second working state so as to enable the motor to generate current and charge the super capacitor.

7. The energy management system of the pure electric vehicle according to claim 6, wherein when the vehicle speed is lower than a preset speed value and the acceleration is smaller than a preset acceleration value, the main relay is controlled to be in the first working state when no braking signal exists and the battery pack voltage is between 25V and 45V, and otherwise, the main relay is controlled to be in the third working state.

8. The energy management system of the pure electric vehicle of claim 1, wherein the energy management controller is connected with the vehicle control unit through a CAN bus.

9. The energy management system of the pure electric vehicle according to claim 1, wherein the energy management controller controls the working state of the main relay according to the acquired battery temperature, so that when the acquired battery temperature is higher than a set value, the connection between the battery pack and the motor is disconnected, and the connection between the super capacitor and the motor is connected.

Technical Field

The invention relates to the technical field of energy management control systems of pure electric vehicles, in particular to an energy management control system of a pure electric vehicle.

Background

In order to deal with the problems of energy shortage and environmental pollution, the development of new energy automobiles is receiving more and more attention from governments and society of various countries. The pure electric vehicle has the outstanding advantages of high efficiency, zero emission and the like, and is one of important directions for vehicle development. However, the performance of the power battery still has a technical bottleneck at the present stage, and the driving range of the pure electric vehicle is obviously reduced along with the decline of the performance of the power battery; especially under the urban driving working conditions of frequent starting, acceleration, braking and the like, the energy consumption of the electric automobile is increased, the driving range is obviously shortened, and the use of the pure electric automobile is severely limited. How to reasonably adjust the energy distribution of the electric automobile under the condition of a complex road, reduce the energy consumption of the whole automobile and prolong the driving range of the pure electric automobile is a main problem concerned by the industry and the scholars. With the development of intelligent transportation and power battery technologies in recent years, the running condition of the pure electric vehicle is constructed and predicted according to the running condition data of an actual road, and meanwhile, the energy dissipation process of the pure electric vehicle is optimized and managed by combining a battery modeling and state estimation method, so that the method becomes an effective way for improving the driving range of the pure electric vehicle.

Disclosure of Invention

The invention aims to provide an energy management control system of a pure electric vehicle, which has the advantages of optimizing energy conservation, and solves the problem that the driving range of the pure electric vehicle is obviously reduced along with the decline of the performance of a power battery of the traditional electric vehicle; especially under the urban driving working conditions of frequent starting, acceleration, braking and the like, the energy consumption of the electric automobile is increased, the driving range is obviously shortened, and the use of the pure electric automobile is seriously limited.

In order to achieve the purpose, the invention provides the following technical scheme: an energy management control system of a pure electric vehicle comprises an energy management controller, a battery pack, a motor, a vehicle control unit and a control terminal;

a temperature sensor is arranged in the energy management controller;

the energy management controller is respectively connected with the battery pack, the motor, the vehicle control unit and the super capacitor;

the battery pack and the super capacitor are connected with the motor through a main relay; the main relay is connected with the energy management controller;

the energy management controller is used for acquiring the battery temperature of the battery pack, the output voltage of the battery pack and the output current of the battery pack, and acquiring the output voltage and the output current of the super capacitor;

the energy management controller is further used for acquiring an input instruction of the control terminal, acquiring the running state of the vehicle through the vehicle control unit, and controlling the working state of the main relay according to the input instruction and the running state of the vehicle; so that the appropriate drive strategy is selected.

The energy management control system of the pure electric vehicle as described above, wherein optionally, the motor includes an electric control controller and a dc brushless motor, the motor controller is electrically connected to the main relay, and the motor controller is connected to the dc brushless motor; the motor controller is electrically connected with the energy management controller;

and the direct current brushless motor is used for driving a vehicle to run or generate power according to the working state of the main relay and the control signal of the energy management controller.

The energy management control system of the pure electric vehicle is characterized in that the energy management control system comprises a battery pack, a super capacitor, a motor, a main relay, a motor and a super capacitor, wherein the battery pack is electrically connected with the motor through the main relay; in a second working state, the battery pack is disconnected with the motor, and the super capacitor is connected with the motor; in a third working state, the battery pack is connected with the motor through the main relay, and the super capacitor is connected with the motor; and under a fourth working state, the battery pack is disconnected with the motor, and the super capacitor is disconnected with the motor.

The energy management control system of the pure electric vehicle optionally further comprises a DC/DC converter and an IGBT driver, wherein the IGBT driver is electrically connected with the energy management controller and the DC/DC converter respectively; the DC/DC converter is connected in series between the super capacitor and the main relay; the IGBT driver is used for acquiring a control signal from the energy management controller, and converting the voltage of the super capacitor into corresponding voltage through the DC/DC converter or converting the electric energy generated by the motor into corresponding voltage according to the control signal so as to charge the super capacitor.

The energy management control system of the pure electric vehicle is characterized in that the energy management controller is electrically connected with the main relay, and the energy management controller is used for controlling the working state of the main relay.

The energy management control system of the pure electric vehicle is as described above, wherein optionally, in the absence of a braking signal: when the acquired battery pack voltage is greater than 48.6V, controlling the main relay to be in a first working state; when the acquired battery pack voltage is between 45V and 48.6V, controlling the main relay to be in a third working state; when the voltage of the battery pack is between 25V and 45V, controlling the working state of the main relay according to the vehicle speed and the acceleration;

in the presence of a brake signal: and controlling the main relay to be in a second working state so as to enable the motor to generate current and charge the super capacitor.

The energy management control system for the pure electric vehicle as described above, optionally, when there is no braking signal and the battery voltage is between 25V and 45V, when the vehicle speed is less than a preset speed value and the acceleration is less than a preset acceleration value, the main relay is controlled to be in the first working state, otherwise, the main relay is controlled to be in the third working state.

The pure electric vehicle energy management control system is characterized in that the energy management controller is connected with the vehicle control unit through a CAN bus.

The energy management control system of the pure electric vehicle as described above, optionally, the energy management controller controls the working state of the main relay according to the acquired battery temperature, so that when the acquired battery temperature is greater than a set value, the connection between the battery pack and the motor is disconnected, and the connection between the super capacitor and the motor is connected.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the super capacitor and the battery pack are arranged on the pure electric vehicle, the corresponding control parameters are obtained from the vehicle control unit, the control terminal, the battery pack and the super capacitor by the energy management controller through the arranged energy management controller, and the power supply mode of the battery pack and the super capacitor is reasonably controlled by various parameters, so that the energy can be greatly saved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The components of the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.