Energy management system and control method for electrically driven paver

文档序号：1809031 发布日期：2021-11-09 浏览：17次中文

阅读说明：本技术 一种电驱动摊铺机能量管理系统以及控制方法 (Energy management system and control method for electrically driven paver ) 是由张超张明年井然刘瑞吴淑莹于 2021-08-31 设计创作，主要内容包括：本发明公开了一种电驱动摊铺机能量管理系统以及控制方法,包括：动力电池、增程器、用电设备、直流母线和能量管理单元；所述的动力电池、增程器和用电设备均与直流母线连接,所述能量管理单元分别与动力电池、增程器、用电设备连接,所述的能量管理单元调节增程器功率,用于实现动力电池、增程器和用电设备之间能量分配管理；所述的能量管理单元调节用电设备功率,用于实现动力电池和用电设备之间能量分配管理。本发明实现增程器、动力电池和用电设备之间能量合理分配。(The invention discloses an energy management system and a control method of an electrically driven paver, comprising the following steps: the system comprises a power battery, a range extender, electric equipment, a direct current bus and an energy management unit; the power battery, the range extender and the electric equipment are all connected with the direct current bus, the energy management unit is respectively connected with the power battery, the range extender and the electric equipment, and the energy management unit adjusts the power of the range extender and is used for realizing energy distribution management among the power battery, the range extender and the electric equipment; the energy management unit adjusts the power of the electric equipment and is used for realizing energy distribution management between the power battery and the electric equipment. The invention realizes reasonable energy distribution among the range extender, the power battery and the electric equipment.)

1. An electrically driven paver energy management system, comprising: the system comprises a power battery, a range extender, electric equipment, a direct current bus and an energy management unit; the power battery, the range extender and the electric equipment are all connected with the direct current bus, the energy management unit is respectively connected with the power battery, the range extender and the electric equipment,

the energy management unit adjusts the power of the range extender and is used for realizing energy distribution management among the power battery, the range extender and the electric equipment;

the energy management unit adjusts the power of the electric equipment and is used for realizing energy distribution management between the power battery and the electric equipment.

2. The system for managing energy of an electrically driven paving machine as recited in claim 1, wherein the power cell is capable of both charging and discharging to release energy from the power cell to the dc bus and from the dc bus to the power cell.

3. The system for managing power of an electrically driven paving machine of claim 1, wherein the range extender comprises: an engine and a generator in series therewith; starting an engine by electric work of a generator, and then enabling the generator to exit from an electric working mode and enter into a power generation mode; energy flows to the range extender from the direct current bus only when the engine is started, and other energy flows to the direct current bus from the range extender, so that the power battery is charged, or electric energy is provided for electric equipment.

4. The system of claim 1, wherein when the powered device is operating in the power mode, power flows from the dc bus to the powered device; when the electric equipment works in a power generation state, energy flows to the direct current bus from the electric equipment, and energy feedback braking is achieved.

5. The method for controlling the energy management system of the electrically driven paver according to any one of the preceding claims 1 to 4, characterized in that the operation mode of the management system comprises: the electric motor comprises a pure electric mode and a hybrid mode, and the working mode is switched by a mode switch.

6. The method for controlling the energy management system of the electrically driven paver of claim 5 wherein the concrete control method of the mixing mode comprises the following modes:

(1) the power of the range extender is automatically adjusted along with the power consumption, and the system uses the power P_1CThe power battery is charged for the first time,

the realization conditions are as follows: when P is present₃＜P_2N - P_1cWhen and P is₂=P₁+P₃，P₁=P_1C；

(2) Power P of range extender_2NGenerating electricity, system with power P₁The power battery is charged for the first time,

the realization conditions are as follows: when P is present₃≥P_2N - P_1c，P₃＜P_2NWhen and P is₂= P_2N，P₁ = P₂ - P₃ ；

(3) Power P of range extender_2NPower generation, power battery andP₁the power is discharged and the discharge is carried out,

the realization conditions are as follows: when P is present₃≥P_2NWhen and P is₂= P_2N，P₁ = P₃ - P₂ ；

Wherein: p_2NFor generating power allowed by the range extender, P_1cAllowable charging power for power battery, P₁For power cell real-time power, P₂For range extender real-time power, P₃The power is real-time power of the electric equipment.

7. The control method of the energy management system of the electrically-driven paver of claim 5, characterized in that the specific control method of the electric-only mode comprises the following modes:

(1) when energy flows to electric equipment from the power battery, the energy management unit ensures that the total power of all electric equipment of the system does not exceed the allowed discharge power by staggering power utilization or limiting the power of part of electric equipment;

(2) when energy flows from the electric equipment to the power battery, the energy management unit controls the braking torque of the engine in the range extender to ensure that the total energy feedback power of the electric equipment of the system does not exceed the allowable charging power of the power battery.

Technical Field

The invention discloses an energy management system and a control method of an electrically driven paver, and relates to the technical field of pavers.

Background

The paver is mainly used for paving construction of stabilized soil and asphalt concrete of roads, and is used for realizing paving of construction materials by conveying the construction materials to the front of an ironing plate through a material conveying mechanism and then primarily compacting the construction materials through the ironing plate and a vibrating mechanism.

Aiming at a range-extending type hybrid power electric driving paver, a power source of the range-extending type hybrid power electric driving paver is composed of a power battery and a range-extending device, aiming at a multi-power system, the power between the range-extending device, the power battery and electric equipment needs to be matched well, and the following problems are caused because the power matching is unreasonable:

1. the range extender power only works according to the allowable charging power of the power battery; when the equipment is in a working state, the power battery works in a discharging state for a long time, and the power battery cannot be charged to an ideal working state in the working process. And stopping charging when necessary.

2. The power of the range extender cannot be automatically adjusted along with the power of the electric equipment, and when the power of the electric equipment is high, the discharge current of the power battery of the vehicle exceeds the rated discharge current for a long time, so that the service life of the power battery is influenced.

3. The power of the range extender cannot be automatically adjusted along with the power of electricity, and when the electricity equipment performs feedback braking, the charging current of the power battery of the vehicle exceeds the allowable charging current, so that the service life of the power battery is influenced, and even the power battery of the vehicle is permanently damaged.

Disclosure of Invention

Aiming at the defects in the background technology, the invention provides an energy management system and a control method of an electrically-driven paver, and reasonable energy distribution among a range extender, a power battery and electric equipment is realized.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an electrically driven paving machine energy management system, comprising: the system comprises a power battery, a range extender, electric equipment, a direct current bus and an energy management unit; the power battery, the range extender and the electric equipment are all connected with the direct current bus, the energy management unit is respectively connected with the power battery, the range extender and the electric equipment,

the energy management unit adjusts the power of the range extender and is used for realizing energy distribution management among the power battery, the range extender and the electric equipment;

the energy management unit adjusts the power of the electric equipment and is used for realizing energy distribution management between the power battery and the electric equipment.

Further, the power battery can be charged to store energy and can also be discharged to release energy, namely, the energy can flow from the power battery to the direct current bus and can also flow from the direct current bus to the power battery.

Further, the range extender includes: an engine and a generator in series therewith; starting an engine by electric work of a generator, and then enabling the generator to exit from an electric working mode and enter into a power generation mode; energy flows to the range extender from the direct current bus only when the engine is started, and other energy flows to the direct current bus from the range extender, so that the power battery is charged, or electric energy is provided for electric equipment.

Further, when the electric equipment works in an electric state, energy flows from the direct current bus to the electric equipment; when the electric equipment works in a power generation state, energy flows to the direct current bus from the electric equipment, and energy feedback braking is achieved.

A control method of an energy management system of an electrically driven paver, wherein the working mode of the management system comprises the following steps: the electric motor comprises a pure electric mode and a hybrid mode, and the working mode is switched by a mode switch.

Further, the concrete control method of the hybrid mode comprises the following modes:

(1) the power of the range extender is automatically adjusted along with the power consumption, and the system uses the power P_1CThe power battery is charged for the first time,

the realization conditions are as follows: when P is present₃＜P_2N - P_1cWhen and P is₂=P₁+P₃，P₁=P_1C；

(2) Power P of range extender_2NGenerating electricity, system with power P₁The power battery is charged for the first time,

the realization conditions are as follows: when P is present₃≥P_2N - P_1c，P₃＜P_2NWhen and P is₂= P_2N，P₁ = P₂ - P₃ ；

(3) Power P of range extender_2NPower generation, power cell with P₁The power is discharged and the discharge is carried out,

the realization conditions are as follows: when P is present₃≥P_2NWhen and P is₂= P_2N，P₁ = P₃ - P₂ ；

Further, the specific control method of the pure electric mode comprises the following modes:

Has the advantages that:

1. the range extender diesel engine works at an economic rotating speed, and energy is saved.

2. In the hybrid mode, the power requirements of the equipment under the limit load are realized by matching the power of the range extender and the power battery and discharging current of the power battery at 2C or higher in a short time, the power of the range extender is automatically regulated by the energy pipe system, and the reasonable energy distribution among the power battery, the range extender and the electric equipment is realized. In the pure electric mode, the energy management system realizes energy management between the power battery and the electric equipment by automatically adjusting the power of the electric equipment.

Drawings

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

Detailed Description

The following describes the embodiments in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in FIG. 1, an electrically driven paving machine energy management system includes: the system comprises a power battery, a range extender, electric equipment, a direct current bus and an energy management unit; the power source 1 is a power battery, the power source 2 is a range extender, the power battery, the range extender and the electric equipment are all connected with a direct current bus, the energy management unit is respectively connected with the power battery, the range extender and the electric equipment,

the energy management unit adjusts the power of the range extender and is used for realizing energy distribution management among the power battery, the range extender and the electric equipment;

the energy management unit adjusts the power of the electric equipment and is used for realizing energy distribution management between the power battery and the electric equipment.

The power battery can be charged to store energy and can also be discharged to release energy, namely the energy can flow to the direct current bus from the power battery, and also can flow to the power battery from the direct current bus.

The range extender includes: an engine and a generator in series therewith; starting an engine by electric work of a generator, and then enabling the generator to exit from an electric working mode and enter into a power generation mode; energy flows to the range extender from the direct current bus only when the engine is started, and other energy flows to the direct current bus from the range extender, so that the power battery is charged, or electric energy is provided for electric equipment.

When the electric equipment works in an electric state, energy flows to the electric equipment from the direct current bus; when the electric equipment works in a power generation state, energy flows to the direct current bus from the electric equipment, and energy feedback braking is achieved.