阅读说明：本技术 一种双源架线电路控制系统及电动牵引车 (Double-source overhead line circuit control system and electric tractor ) 是由 孟为祥 陈小微 陈方明 刘吉顺 于 2021-11-09 设计创作，主要内容包括：本发明涉及一种双源架线电路控制系统及电动牵引车,涉及电动牵引车技术领域,包括受电弓、动力蓄电池、DC/DC电源模块、第一串联电路、第二串联电路、第一并联电路及第二并联电路；受电弓上连接有第一串联电路、第一并联电路及第二并联电路,用于提供电能；受电弓上还连接有第二串联电路,第二串联电路上串联有DC/DC电源模块和动力蓄电池,受电弓通过DC/DC电源模块给动力蓄电池充电；动力蓄电池和第一串联电路、第一并联电路及第二并联电路连接,用于为第一串联电路、第一并联电路及第二并联电路提供电能。其优点在于：支持架空线受电弓无限续航作业,以及车载动力蓄电池高负载作业,作业场景大范围拓宽；支持受电弓给动力电池充电蓄能。(The invention relates to a double-source overhead line circuit control system and an electric tractor, which relate to the technical field of electric tractors and comprise a pantograph, a power storage battery, a DC/DC power module, a first series circuit, a second series circuit, a first parallel circuit and a second parallel circuit; the pantograph is connected with a first series circuit, a first parallel circuit and a second parallel circuit and used for providing electric energy; the pantograph is also connected with a second series circuit, the second series circuit is connected with a DC/DC power supply module and a power storage battery in series, and the pantograph charges the power storage battery through the DC/DC power supply module; the power storage battery is connected with the first series circuit, the first parallel circuit and the second parallel circuit and used for providing electric energy for the first series circuit, the first parallel circuit and the second parallel circuit. The advantages are that: the unlimited endurance operation of the overhead line pantograph and the high-load operation of the vehicle-mounted power storage battery are supported, and the operation scene is widened in a large range; and the pantograph is supported to charge and store energy for the power battery.)

1. A double-source overhead line circuit control system is characterized by comprising a pantograph (1), a power storage battery (2), a DC/DC power module (3), a first series circuit (4), a second series circuit (5), a first parallel circuit (6) and a second parallel circuit (7);

the pantograph (1) is connected with the first series circuit (4) and is used for providing electric energy for the first series circuit (4);

the pantograph is further connected with the second series circuit (5), the DC/DC power module (3) and the power storage battery (2) are connected in series on the second series circuit (5), and the pantograph (1) charges the power storage battery (2) through the DC/DC power module (3);

the pantograph (1) is also connected with the first parallel circuit (6) and the second parallel circuit (7) and used for providing electric energy for the first parallel circuit (6) and the second parallel circuit (7);

the power storage battery (2) is connected with the first series circuit (4), the first parallel circuit (6) and the second parallel circuit (7) and is used for providing electric energy for the first series circuit (4), the first parallel circuit (6) and the second parallel circuit (7);

the first series circuit (4), the second series circuit (5), the first parallel circuit (6), and the second parallel circuit (7) are connected in parallel with each other.

2. The dual-source overhead line circuit control system according to claim 1, wherein the first parallel circuit (6) is composed of a third series circuit (8), a fourth series circuit (9) and a fifth series circuit (10) connected in parallel, and the second parallel circuit (7) is composed of a sixth series circuit (11), a seventh series circuit (12), an eighth series circuit (13) and a ninth series circuit (14) connected in parallel.

3. The dual-source overhead line circuit control system according to claim 2, further comprising a driving motor controller (15), a driving motor (16), an electric air compressor controller (17), an electric air compressor (18), a steering oil pump motor controller (19), a steering motor (20), a DC/DC converter (21), and an on-vehicle battery (22);

the driving motor controller (15) and the driving motor (16) are connected in series on the first series circuit (4), the pantograph (1) is used for providing electric energy for the driving motor controller (15) and the driving motor (16), and the driving motor (16) is controlled to rotate through the driving motor controller (15);

the electric air compressor controller (17) and the electric air compressor (18) are connected in series on the third series circuit (8), the pantograph (1) is used for providing electric energy for the electric air compressor controller (17) and the electric air compressor (18), and the electric air compressor (18) is controlled to move through the electric air compressor controller (17);

the steering oil pump motor controller (19) and the steering motor (20) are connected in series on the fourth series circuit (9), the pantograph (1) is used for providing electric energy for the steering oil pump motor controller (19) and the steering motor (20), and the steering motor (20) is controlled to rotate through the steering oil pump motor controller (19);

the DC/DC converter (21) and the vehicle-mounted battery (22) are connected in series on the fifth series circuit (10), and the pantograph (1) charges the vehicle-mounted battery (22) through the DC/DC converter (21);

or the power storage battery (2) is used for supplying electric energy to the driving motor controller (15), the driving motor (16), the electric air compressor controller (17), the electric air compressor (188), the steering oil pump motor controller (19) and the steering motor (20), and the power storage battery (2) charges the vehicle-mounted storage battery (22) through the DC/DC converter (21).

4. The dual-source overhead line control system according to claim 2, further comprising a high-voltage heating device (23), an electric defrosting device (24), a battery water cooling device (25) and an air conditioning device (26), wherein the high-voltage heating device (23), the electric defrosting device (24), the battery water cooling device (25) and the air conditioning device (26) are respectively connected in series on the sixth series circuit (11), the seventh series circuit (12), the eighth series circuit (13) and the ninth series circuit (14), and the pantograph (1) is used for providing electric energy for the high-voltage heating device (23), the electric defrosting device (24), the battery water cooling device (25) and the air conditioning device (26);

or the power storage battery (2) is used for providing electric energy for the high-pressure heating device (23), the electric defrosting device (24), the battery water cooling device (25) and the air conditioning device (26).

5. The dual-source overhead line control system according to claim 3, wherein a pre-charging circuit (27) is connected in series with the first series circuit (4), the second series circuit (5) and the first parallel circuit (6), and the pre-charging circuit (27) is composed of a pre-charging relay (28), a pre-charging resistor (29) and a main relay (30) which are connected end to end in the positive and negative poles.

6. The dual-source overhead line circuit control system according to claim 3, wherein a reactor (31) is connected in series to the first series circuit (4) and the second series circuit (5).

7. The dual-source overhead line control system of claim 2, wherein fuses (32) are connected in series on the first series circuit (4), the second series circuit (5), the sixth series circuit (11), the seventh series circuit (12), the eighth series circuit (13), the ninth series circuit (14) and the first parallel circuit (6).

8. The double-power-supply overhead line control system according to claim 1, wherein a switch (33) for controlling the on and off of the power supply of the pantograph (1) and the power storage battery (2) is arranged on each of the pantograph (1) and the power storage battery (2).

9. The dual-source stringing circuit control system according to claim 1, characterized in that a thyristor contactor (34) is connected between the pantograph (1) and the first parallel circuit (6), and the thyristor contactor (34) is connected between the power accumulator (2) and the first and second parallel circuits (4, 7).

10. An electric traction vehicle, characterized in that: comprising the dual source overhead line circuit control system of any of claims 1-9.

Technical Field

The invention relates to the technical field of electric tractors, in particular to a double-source overhead line circuit control system.

Background

The electric tractor is driven by the motor for the transportation of the inside and outside bulk goods in workshop, the transport of assembly line material, the interval material handling of large-scale mill, the material often leaves in the trailer, needs the tractor to solve the high-efficient transportation of different interval materials. The rated traction mass is from 30 tons to 39 tons.

According to the purpose of the vehicle, the vehicle can be classified into a sitting type electric tractor, a standing type electric tractor, a mini type tractor, an electric double-drive tractor, a walking type electric tractor, an electric material electric tractor, a full-electric forklift, a balanced type electric forklift, a traction type electric forklift and the like.

However, the power supply of the existing tractor driving and controlling system only has a single power battery system source, the endurance mileage is generally about 100-.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The invention aims to provide a double-source overhead line circuit control system and an electric tractor, wherein the double-source overhead line circuit control system supports the unlimited endurance operation of an overhead line pantograph and the high-load operation of a vehicle-mounted power storage battery, and the operation scene is widened in a large range; and the pantograph is supported to charge and store energy for the power battery.

The invention provides a double-source overhead line circuit control system, which comprises a pantograph, a power storage battery, a DC/DC power module, a first series circuit, a second series circuit, a first parallel circuit and a second parallel circuit, wherein the pantograph is connected with the power storage battery; the pantograph is connected with the first series circuit and used for providing electric energy for the first series circuit; the pantograph is also connected with the second series circuit, the DC/DC power supply module and the power storage battery are connected in series on the second series circuit, and the pantograph charges the power storage battery through the DC/DC power supply module; the pantograph is also connected with the first parallel circuit and the second parallel circuit and used for providing electric energy for the first parallel circuit and the second parallel circuit; the power storage battery is connected with the first series circuit, the first parallel circuit and the second parallel circuit and used for providing electric energy for the first series circuit, the first parallel circuit and the second parallel circuit; the first series circuit, the second series circuit, the first parallel circuit and the second parallel circuit are connected in parallel.

Furthermore, the first parallel circuit is formed by connecting a third series circuit, a fourth series circuit and a fifth series circuit in parallel, and the second parallel circuit is formed by connecting a sixth series circuit, a seventh series circuit, an eighth series circuit and a ninth series circuit in parallel.

Furthermore, the double-source overhead line circuit control system also comprises a driving motor controller, a driving motor, an electric air compressor controller, an electric air compressor, a steering oil pump motor controller, a steering motor, a DC/DC converter and a vehicle-mounted storage battery; the drive motor controller and the drive motor are connected in series on the first series circuit, the pantograph is used for providing electric energy for the drive motor controller and the drive motor, and the drive motor is controlled to rotate by the drive motor controller; the electric air compressor controller and the electric air compressor are connected in series on the third series circuit, the pantograph is used for providing electric energy for the electric air compressor controller and the electric air compressor, and the electric air compressor is controlled to move by the electric air compressor controller; the steering oil pump motor controller and the steering motor are connected in series on the fourth series circuit, the pantograph is used for providing electric energy for the steering oil pump motor controller and the steering motor, and the steering motor is controlled to rotate by the steering oil pump motor controller; the DC/DC converter and the vehicle-mounted storage battery are connected in series on the fifth series circuit, and the pantograph charges the vehicle-mounted storage battery through the DC/DC converter;

or the power storage battery is used for supplying electric energy to the driving motor controller, the driving motor, the electric air compressor controller, the electric air compressor, the steering oil pump motor controller and the steering motor, and the power storage battery is charged by the DC/DC converter.

Further, the dual-source overhead line circuit control system further comprises a high-voltage heating device, an electric defrosting device, a battery water cooling device and an air conditioning device, wherein the high-voltage heating device, the electric defrosting device, the battery water cooling device and the air conditioning device are respectively connected in series on the sixth series circuit, the seventh series circuit, the eighth series circuit and the ninth series circuit, and the pantograph is used for providing electric energy for the high-voltage heating device, the electric defrosting device, the battery water cooling device and the air conditioning device;

or the power storage battery is used for providing electric energy for the high-pressure heating device, the electric defrosting device, the battery water cooling device and the air conditioning device;

furthermore, the first series circuit, the second series circuit and the first parallel circuit are all connected in series with a pre-charging circuit, and the pre-charging circuit is formed by connecting a pre-charging relay, a pre-charging resistor and the positive electrode and the negative electrode of the main relay in a head-to-tail manner.

Further, a reactor is connected in series to the first series circuit and the second series circuit.

Further, fuses are connected in series to the first series circuit, the second series circuit, the sixth series circuit, the seventh series circuit, the eighth series circuit, the ninth series circuit, and the first parallel circuit.

Furthermore, switches for controlling the power supply of the pantograph and the power storage battery to be turned on and off are arranged on the pantograph and the power storage battery.

Further, a thyristor contactor is connected between the pantograph and the first parallel circuit, and a thyristor contactor is connected between the power storage battery and the first and second parallel circuits.

The invention also provides an electric tractor which comprises the double-source overhead line circuit control system.

The invention provides a double-source overhead line circuit control system and an electric tractor, wherein a pantograph of the double-source overhead line circuit control system is connected with a first series circuit, a second series circuit, a first parallel circuit and a second parallel circuit and is used for supplying power to the first series circuit, the second series circuit, the first parallel circuit and the second parallel circuit; meanwhile, the pantograph charges the power storage battery through the DC/DC power supply module; the power storage battery is connected with the first series circuit, the first parallel circuit and the second parallel circuit and used for providing electric energy for the first series circuit, the first parallel circuit and the second parallel circuit; by supporting the unlimited endurance operation of the overhead line pantograph and the high-load operation of the power storage battery, the operation scene is widened in a large range; the pantograph can charge and store energy for the power storage battery.

Drawings

Fig. 1 is a schematic structural diagram of a dual-source overhead line circuit control system according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the dual-source overhead line circuit control system in fig. 1.

Fig. 3 is another schematic diagram of the dual-source overhead line circuit control system of fig. 1.

The reference numerals and components referred to in the drawings are as follows:

1. pantograph 2, power storage battery 3 and DC/DC power module

4. First series circuit 5, second series circuit 6, first parallel circuit

7. Second parallel circuit 8, third series circuit 9, fourth series circuit

10. Fifth series circuit 11, sixth series circuit 12, seventh series circuit

13. Eighth series circuit 14, ninth series circuit 15, drive motor controller

16. Driving motor 17, electric air compressor controller 18 and electric air compressor

19. Steering oil pump motor controller 20, steering motor 21, DC/DC converter

22. Vehicle-mounted storage battery 23, high-voltage heating device 24 and electric defrosting device

25. Battery water cooling device 26, air conditioner 27, and precharge circuit

28. Pre-charge relay 29, pre-charge resistor 30, main relay

31. Reactor 32, fuse 33, and switch

34. Silicon controlled contactor

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The terms first, second, third, fourth and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

Fig. 1 is a schematic structural diagram of a dual-source overhead line circuit control system according to an embodiment of the present invention. Referring to fig. 1, a dual-power stringing circuit control system according to an embodiment of the present invention includes a pantograph 1, a power battery 2, a DC/DC power module 3, a first series circuit 4, a second series circuit 5, a first parallel circuit 6, and a second parallel circuit 7; the pantograph 1 is connected with a first series circuit 4 and used for providing electric energy for the first series circuit 4; the pantograph is also connected with a second series circuit 5, the second series circuit 5 is connected with a DC/DC power module 3 and a power storage battery 2 in series, and the pantograph 1 charges the power storage battery 2 through the DC/DC power module 3; the pantograph 1 is also connected with a first parallel circuit 6 and a second parallel circuit 7, and is used for providing electric energy for the first parallel circuit 6 and the second parallel circuit 7; the power storage battery 2 is connected with the first series circuit 4, the first parallel circuit 6 and the second parallel circuit 7 and is used for providing electric energy for the first series circuit 4, the first parallel circuit 6 and the second parallel circuit 7; the first series circuit 4, the second series circuit 5, the first parallel circuit 6, and the second parallel circuit 7 are connected in parallel with each other.

The pantograph 1 is a DC750V pantograph, and the DC/DC power module 3 is a 250kw DC/DC power module.

The invention provides a double-source overhead line circuit control system.A pantograph 1 is connected with a first series circuit 4, a second series circuit 5, a first parallel circuit 6 and a second parallel circuit 7 and is used for supplying power to the first series circuit 4, the second series circuit 5, the first parallel circuit 6 and the second parallel circuit 7; meanwhile, the pantograph 1 charges the power storage battery 2 through the DC/DC power module 3; the power storage battery 2 is connected with the first series circuit 4, the first parallel circuit 6 and the second parallel circuit 7, and when the pantograph 1 is disconnected from power supply, the power storage battery 2 can be used for supplying electric energy to the first series circuit 4, the first parallel circuit 6 and the second parallel circuit 7; by supporting the unlimited endurance operation of the overhead line pantograph 1 and the high-load operation of the power storage battery 2, the operation scene is widened in a large range; when the power storage battery 2 is insufficient, the pantograph 1 can charge the power storage battery 2 to store energy.

Fig. 3 is another schematic diagram of the dual-source overhead line circuit control system of fig. 1. Referring to fig. 3, the first parallel circuit 6 according to the embodiment of the present invention is formed by connecting the third series circuit 8, the fourth series circuit 9 and the fifth series circuit 10 in parallel, and the second parallel circuit 7 is formed by connecting the sixth series circuit 11, the seventh series circuit 12, the eighth series circuit 13 and the ninth series circuit 14 in parallel.

Fig. 2 is a schematic structural diagram of the dual-source overhead line circuit control system in fig. 1. Referring to fig. 2, the dual-source overhead line circuit control system according to the embodiment of the present invention further includes a driving motor controller 15, a driving motor 16, an electric air compressor controller 17, an electric air compressor 18, a steering oil pump motor controller 19, a steering motor 20, a DC/DC converter 21, and a vehicle-mounted battery 22; the driving motor controller 15 and the driving motor 16 are connected in series on the first series circuit 4, the pantograph 1 is used for providing electric energy for the driving motor controller 15 and the driving motor 16, and the driving motor 16 is controlled to rotate by the driving motor controller 15; the electric air compressor controller 17 and the electric air compressor 18 are connected in series on the third series circuit 8, the pantograph 1 is used for providing electric energy for the electric air compressor controller 17 and the electric air compressor 18, and the electric air compressor 18 is controlled to move through the electric air compressor controller 17; the steering oil pump motor controller 19 and the steering motor 20 are connected in series on the fourth series circuit 9, the pantograph 1 is used for providing electric energy for the steering oil pump motor controller 19 and the steering motor 20, and the steering motor 20 is controlled to rotate by the steering oil pump motor controller 19; the DC/DC converter 21 and the vehicle-mounted battery 22 are connected in series to the fifth series circuit 10, and the pantograph 1 charges the vehicle-mounted battery 22 through the DC/DC converter 21;

or the power storage battery 2 is used for providing electric energy for the driving motor controller 15, the driving motor 16, the electric air compressor controller 17, the electric air compressor 188, the steering oil pump motor controller 19 and the steering motor 20, and the power storage battery 2 charges the vehicle-mounted storage battery 22 through the DC/DC converter 21.

The vehicle-mounted battery 22 is a 24V battery;

when power is supplied through the pantograph 1, the pantograph 1 supplies electric energy to the driving motor controller 15, the driving motor 16, the electric air compressor controller 17, the electric air compressor 18, the steering oil pump motor controller 19 and the steering motor 20, and the driving motor 16 is controlled to rotate through the driving motor controller 15; the electric air compressor 18 is controlled to move by the electric air compressor controller 17; the steering motor 20 is controlled to rotate by the steering oil pump motor controller 19; meanwhile, the pantograph 1 charges the vehicle-mounted storage battery 22 through the DC/DC converter 21, and the pantograph 1 charges the power storage battery 2 through the DC/DC power module 3.

When power is supplied through the pantograph 1, the power storage battery 2 is used to supply electric power to the driving motor controller 15, the driving motor 16, the electric air compressor controller 17, the electric air compressor 188, the steering oil pump motor controller 19, and the steering motor 20, and the power storage battery 2 charges the vehicle-mounted storage battery 22 through the DC/DC converter 21.

The method supports the unlimited endurance operation of the overhead line pantograph 1 and the high-load operation of the power storage battery 2, widens the operation scene in a large range, and supports the charging and energy storage of the power storage battery 2 by the pantograph 1.

With further reference to fig. 2 and 3, the dual-source overhead line circuit control system provided by the present invention further includes a high-voltage heating device 23, an electric defrosting device 24, a battery water cooling device 25 and an air conditioning device 26, wherein the high-voltage heating device 23, the electric defrosting device 24, the battery water cooling device 25 and the air conditioning device 26 are respectively connected in series to the sixth series circuit 11, the seventh series circuit 12, the eighth series circuit 13 and the ninth series circuit 14, and the pantograph 1 is used for providing electric energy for the high-voltage heating device 23, the electric defrosting device 24, the battery water cooling device 25 and the air conditioning device 26;

or the power storage battery 2 is used for supplying electric energy to the high-pressure heating device 23, the electric defrosting device 24, the battery water cooling device 25 and the air conditioning device 26.

Referring to fig. 2, the first series circuit 4, the second series circuit 5, and the first parallel circuit 6 are all connected in series with a precharge circuit 27, and the precharge circuit 27 is formed by connecting the positive and negative poles of a precharge relay 28, a precharge resistor 29, and a main relay 30 to each other end to end. It should be noted that, at the moment when the frequency converter is powered on, since the voltage across the capacitor of the energy storage element on the dc bus is 0 before, a large impact current is generated, the voltage drop of the power supply increases, interference to the power grid is formed, and the charging current of the capacitor can be reduced through the pre-charging loop 27.

Further, a reactor 31 is connected in series to the first series circuit 4 and the second series circuit 5, and the reactor 31 is mainly used for limiting a short-circuit current.

Further, fuses 32 are connected in series to the first series circuit 4, the second series circuit 5, the sixth series circuit 11, the seventh series circuit 12, the eighth series circuit 13, the ninth series circuit 14, and the first parallel circuit 6, and short-circuit protection is performed by the fuses 32.

Furthermore, switches 33 for controlling the on and off of the power supply of the pantograph 1 and the power storage battery 2 are arranged on the pantograph 1 and the power storage battery 2. When the pantograph 1 is required to supply power, the power storage battery 2 is disconnected from the power supply through the switch 33; when the power storage battery 2 is required to supply power, the switch 33 disconnects the power supply to the pantograph 1.

Further, a thyristor contactor 34 is connected between the pantograph 1 and the first parallel circuit 6, and a thyristor contactor 34 is connected between the power storage battery 2 and the first and second parallel circuits 4 and 7. The thyristor contactor 34 not only makes and breaks the circuit, but also has a low voltage discharge protection function.

Based on the above description, the present invention has the following advantages:

1. according to the double-source overhead line circuit control system, a first series circuit 4, a second series circuit 5, a first parallel circuit 6 and a second parallel circuit 7 are connected to a pantograph 1 and used for supplying power to the first series circuit 4, the second series circuit 5, the first parallel circuit 6 and the second parallel circuit 7; meanwhile, the pantograph 1 charges the power storage battery 2 through the DC/DC power module 3; the power storage battery 2 is connected with the first series circuit 4, the first parallel circuit 6 and the second parallel circuit 7, and when the pantograph 1 is disconnected from power supply, the power storage battery 2 can be used for supplying electric energy to the first series circuit 4, the first parallel circuit 6 and the second parallel circuit 7; by supporting the unlimited endurance operation of the overhead line pantograph 1 and the high-load operation of the power storage battery 2, the operation scene is widened in a large range; when the power storage battery 2 is insufficient, the pantograph 1 can charge the power storage battery 2 to store energy.

2. According to the double-source overhead line circuit control system, the original high-voltage system at the load end of a vehicle power storage battery, a driving motor, an auxiliary driving motor and the like can be used, and vehicle refitting can be completed only by adding the high-voltage DCDC cabinet module and the roof power receiving module on the original basis.

The invention also provides an electric tractor which comprises the double-source overhead line circuit control system.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.