Power supply system, electric mining truck

Abstract

This utility model provides a power supply system, including: a power receiving component, a high-voltage distribution cabinet, a high-voltage distribution box, and a power battery pack; the power receiving component is detachably electrically connected to the high-voltage power grid and electrically connected to the high-voltage distribution cabinet to receive the grid voltage provided by the high-voltage power grid and transmit the grid voltage to the high-voltage distribution cabinet; the high-voltage distribution cabinet is electrically connected to the electric drive system and the high-voltage distribution box, and is used to step down the grid voltage and distribute it to the electric drive system and the high-voltage distribution box; the high-voltage distribution box is electrically connected to the power battery pack, and is used to receive the first grid voltage distributed by the high-voltage distribution cabinet, output charging voltage to the power battery pack, and also to output the battery voltage output by the power battery pack to the electric drive system through the high-voltage distribution cabinet. This utility model also provides an electric mining truck. The power supply system and electric mining truck of this utility model can improve the driving range of the electric mining truck, thereby improving the attendance efficiency of the electric mining truck.

Description

Technical Field

[0001] This utility model relates to the field of engineering vehicle technology, and in particular to a power supply system and an electric mining truck. Background Technology

[0002] With the proposal and steady advancement of the national dual-carbon strategy, and the continuous development of new energy technologies, the pace of electrification of mining trucks used for transporting earth and stone is also gradually accelerating.

[0003] At present, electric mining trucks mainly use the power battery pack installed on the vehicle as the power source to drive the motor and the entire vehicle.

[0004] However, the current electric mining trucks are limited by the technology of the power battery pack and its energy density, which greatly limits their driving range and reduces their operational efficiency. Utility Model Content

[0005] This utility model provides a power supply system and an electric mining vehicle using the same, which can improve the driving range of the electric mining vehicle, thereby improving the attendance efficiency of the electric mining vehicle and providing high flexibility.

[0006] This utility model provides a power supply system, including: a power receiving component, a high-voltage distribution cabinet, a high-voltage distribution box, and a power battery pack; the power receiving component is detachably electrically connected to a high-voltage power grid and electrically connected to the high-voltage distribution cabinet to receive the grid voltage provided by the high-voltage power grid and transmit the grid voltage to the high-voltage distribution cabinet; the high-voltage distribution cabinet is electrically connected to an electric drive system and the high-voltage distribution box, and is used to step down the grid voltage and distribute it to the electric drive system and the high-voltage distribution box; the high-voltage distribution box is electrically connected to the power battery pack, and is used to receive the first grid voltage distributed by the high-voltage distribution cabinet, output a charging voltage to the power battery pack, and also to output the battery voltage output by the power battery pack to the electric drive system through the high-voltage distribution cabinet.

[0007] In one embodiment, the power receiving component includes a pantograph and a first switching component; the pantograph is electrically connected to the high-voltage power grid; the first switching component is located in the energy recovery circuit of the pantograph and is used to disconnect or connect the energy recovery circuit of the pantograph, and when connected, transmit the received braking energy recovery to the high-voltage power grid.

[0008] In one embodiment, the high-voltage distribution cabinet includes a contactor for identifying whether the energized component is electrically connected to the high-voltage power grid.

[0009] In one embodiment, the high-voltage distribution cabinet includes a second switching assembly and an on-board capacitor; the on-board capacitor is electrically connected to the second switching assembly; the second switching assembly is located in the energy recovery circuit of the on-board capacitor, and is used to disconnect or connect the energy recovery circuit of the on-board capacitor, and when connected, transmits the received braking recovery energy to the on-board capacitor so that the on-board capacitor can be charged.

[0010] In one embodiment, the power system further includes a third switching component; the third switching component is located in the energy recovery circuit of the power battery pack, and is used to disconnect or connect the energy recovery circuit of the power battery pack, and when connected, output the received braking recovery energy to the power battery pack so that the power battery pack can be charged.

[0011] This utility model also provides an electric mining vehicle, which includes the aforementioned power supply system and electric drive system.

[0012] In one embodiment, the electric drive system includes a motor control module, a first drive motor, and a second drive motor. The motor control module is electrically connected to the high-voltage distribution cabinet and is used to receive the grid voltage distributed by the high-voltage distribution cabinet after stepping down the grid voltage, or to receive the battery voltage output by the high-voltage distribution box through the high-voltage distribution cabinet, and output a first power supply voltage to the first drive motor and a second power supply voltage to the second drive motor. The first drive motor is used to receive the first power supply voltage and output a first drive torque to drive the middle axle. The second drive motor is used to receive the second power supply voltage and output a second drive torque to drive the rear axle.

[0013] In one embodiment, the motor control module includes a main drive controller, an auxiliary drive controller, and a second motor controller. The main drive controller is used to receive a second grid voltage distributed by the high-voltage distribution cabinet after stepping down the grid voltage, or to receive a first battery voltage output by the high-voltage distribution box through the high-voltage distribution cabinet, so as to output the first power supply voltage to the first drive motor. The auxiliary drive controller is used to receive a third grid voltage distributed by the high-voltage distribution cabinet after stepping down the grid voltage, or to receive a second battery voltage output by the high-voltage distribution box through the high-voltage distribution cabinet, so as to output the second power supply voltage to the second drive motor through the second motor controller.

[0014] In one embodiment, the electric drive system further includes a steering motor; the main drive controller is also electrically connected to the steering motor for outputting a third power supply voltage to the steering motor.

[0015] In one embodiment, the auxiliary drive controller includes at least one of a first DC / DC converter, a second DC / DC converter, a first DC / AC converter, and a third DC / DC converter; the first DC / DC converter is electrically connected to a battery; the second DC / DC converter is connected to an air conditioner thermistor; the first DC / AC converter is connected to an air compressor; and the third DC / DC converter is electrically connected to an air conditioner compressor.

[0016] This utility model discloses a power supply system and an electric mining truck, comprising: a power receiving component, a high-voltage distribution cabinet, a high-voltage distribution box, and a power battery pack. Therefore, it can receive grid voltage provided by the high-voltage power grid through the power receiving component or output battery voltage through the power battery pack, and output it to the electric drive system through the high-voltage distribution cabinet. Thus, this utility model's power supply system and electric mining truck can improve the driving range of the electric mining truck, thereby increasing its operational efficiency and flexibility.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 The diagram shown is a block diagram illustrating the structure and connection relationship of a power supply system according to an embodiment of this utility model.

[0019] Figure 2 The diagram shown is a block diagram illustrating the structure and connection relationship of a power supply system according to another embodiment of this utility model.

[0020] Figure 3 The diagram shown is an electrical signal transmission diagram of an electric mining truck provided in an embodiment of this utility model when powered by a high-voltage power grid.

[0021] Figure 4 The diagram shown is an electrical signal transmission diagram of an electric mining truck provided in an embodiment of this utility model when powered by a power battery pack.

[0022] Figure 5 The diagram shown is an electrical signal transmission diagram of an electric mining truck during braking energy recovery according to an embodiment of this utility model. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the present utility model will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0024] Figure 1The diagram shown is a block diagram illustrating the structure and connection relationships of a power supply system according to an embodiment of this utility model. Figure 1 As shown, a power supply system provided in one embodiment of the present invention includes: a power receiving component 10, a high-voltage distribution cabinet 11, a high-voltage distribution box 12, and a power battery pack 13.

[0025] The receiving component 10 is detachably electrically connected to the high-voltage power grid and electrically connected to the high-voltage distribution cabinet 11. It receives the grid voltage provided by the high-voltage power grid and transmits the grid voltage to the high-voltage distribution cabinet 11. The high-voltage distribution cabinet 11 is electrically connected to the electric drive system 2 and the high-voltage distribution box 12. It steps down the grid voltage and distributes it to the electric drive system 2 and the high-voltage distribution box 12. The high-voltage distribution box 12 is electrically connected to the power battery pack 13. It receives the first grid voltage distributed by the high-voltage distribution cabinet 11, outputs a charging voltage to the power battery pack 13, and also outputs the battery voltage from the power battery pack 13 to the electric drive system 2 through the high-voltage distribution cabinet 11. Specifically, in one embodiment, the high-voltage power grid is a high-voltage DC power grid. The DC / DC step-down circuit in the high-voltage distribution cabinet 11 steps down the grid voltage provided by the high-voltage power grid and distributes it to the electric drive system 2 and the high-voltage distribution box 12.

[0026] In one embodiment, the high-voltage distribution cabinet 11 is also used to receive the regenerative braking energy output by the electric drive system 2, and transmit the received regenerative braking energy to the power battery pack 13 through the high-voltage distribution box 12 to charge the power battery pack 13, or transmit the received regenerative braking energy to the high-voltage power grid through the power receiving component 10, or store the regenerative braking energy to improve energy utilization.

[0027] In one embodiment, the power receiving component 10 includes a pantograph and a first switching assembly. The pantograph is electrically connected to a high-voltage power grid. The first switching assembly is located in the pantograph's energy recovery circuit and is used to disconnect or connect the pantograph's energy recovery circuit. When connected, it transmits the received braking and regenerative braking energy to the high-voltage power grid, thereby supplying power to other electrical equipment connected to the high-voltage power grid.

[0028] In one embodiment, the high-voltage distribution cabinet 11 includes a contactor for identifying whether the energized component 10 is electrically connected to the high-voltage power grid. Specifically, in one embodiment, the contactor may be connected to a vehicle controller to send the detection result of whether the energized component 10 is electrically connected to the high-voltage power grid to the vehicle controller (not shown in the figure).

[0029] In one embodiment, the high-voltage distribution cabinet 11 includes an on-board capacitor and a second switching assembly. The on-board capacitor is electrically connected to the second switching assembly. The second switching assembly is located in the energy recovery circuit of the on-board capacitor and is used to disconnect or connect the energy recovery circuit of the on-board capacitor. When connected, it transfers the received regenerative braking energy to the on-board capacitor to charge it.

[0030] In one embodiment, the power system further includes a third switching assembly. The third switching assembly is located in the energy recovery circuit of the power battery pack 13 and is used to disconnect or connect the energy recovery circuit of the power battery pack 13. When connected, it outputs the received regenerative braking energy to the power battery pack 13 so that the power battery pack 13 can be charged.

[0031] In one embodiment, the first, second, and third switch components are all mechanical switches, and are turned on or off based on user operations such as pressing, tossing, or rotating. In other embodiments, at least one of the first, second, and third switch components may also be a relay. At least one of the first, second, and third switch components may be connected to the vehicle controller and be turned on or off based on the corresponding control signal output by the vehicle controller. Specifically, when the vehicle is in braking condition, the vehicle controller may control one of the first, second, and third switch components to be turned on based on the remaining charge of the power battery pack 13 output by the battery management system. For example, when the remaining charge of the power battery pack 13 is lower than a first preset threshold, the vehicle controller controls the third switch component to be turned on, so that the high-voltage distribution cabinet 11 can transmit the received braking recovery energy to the power battery pack 13 through the high-voltage distribution box 12, thereby charging the power battery pack 13. For example, if the remaining charge of the power battery pack 13 is not lower than the first preset threshold, the vehicle controller may, but is not limited to, control the second switch assembly to conduct when the remaining capacity of the on-board capacitor is less than the second preset threshold, so that the energy recovery circuit of the on-board capacitor in the high-voltage distribution cabinet 11 is conducted, thereby receiving regenerative braking energy to charge the on-board capacitor. As another example, if the remaining charge of the power battery pack 13 is not lower than the first preset threshold, the vehicle controller may, but is not limited to, control the first switch assembly to conduct when the remaining capacity of the on-board capacitor is greater than the second preset threshold, so that the high-voltage distribution cabinet 11 transmits the received regenerative braking energy to the high-voltage power grid through the pantograph's energy recovery circuit.

[0032] In one embodiment, the electric drive system 2 includes a motor control module, a first drive motor 21, and a second drive motor 24. The motor control module is electrically connected to the high-voltage distribution cabinet 11 and is used to receive the grid voltage distributed by the high-voltage distribution cabinet 11 after stepping down the grid voltage, or to receive the battery voltage output by the high-voltage distribution box 12 through the high-voltage distribution cabinet 11, and output a first supply voltage to the first drive motor 21 and a second supply voltage to the second drive motor 24. The first drive motor 21 receives the first supply voltage and outputs a first drive torque to drive the middle axle. The second drive motor 24 receives the second supply voltage and outputs a second drive torque to drive the rear axle.

[0033] In one embodiment, the motor control module includes a main drive controller 20, an auxiliary drive controller 22, and a second motor controller 23. The main drive controller 20 receives a second grid voltage distributed by the high-voltage distribution cabinet 11 after stepping down the grid voltage, or receives a first battery voltage output by the high-voltage distribution box 12 through the high-voltage distribution cabinet 11, to output a first supply voltage to the first drive motor 21. The auxiliary drive controller 22 receives a third grid voltage distributed by the high-voltage distribution cabinet 11 after stepping down the grid voltage, or receives a second battery voltage output by the high-voltage distribution box 12 through the high-voltage distribution cabinet 11, to output a second supply voltage to the second drive motor 24 through the second motor controller 23. Specifically, in one embodiment, the main drive controller 20 and the auxiliary drive controller 22 can be integrated together, or the main drive controller 20, the auxiliary drive controller 22, and the second motor controller 23 can be integrated together to improve the integration of the power supply system.

[0034] Figure 2 The diagram shown is a structural and connection diagram of a power supply system according to another embodiment of this utility model. Figure 2 As shown, the power supply system may also include a heat sink 14. The heat sink 14 is electrically connected to the high-voltage distribution box 12 and is powered by the high-voltage distribution box 12.

[0035] In one embodiment, the high-voltage distribution box 12 may also be provided with a charging interface 121. The power battery pack 13 can receive voltage provided by the charging equipment through the charging interface 121 on the high-voltage distribution box 12 for charging.

[0036] In one embodiment, the electric drive system 2' further includes a steering motor 25. The main drive controller 20 is also electrically connected to the steering motor 25 and is used to output a third supply voltage to the steering motor 25. Specifically, the main drive controller 20 outputs the third supply voltage to the steering motor 25 via a built-in DC / AC converter to power the steering motor 25. The active controller 20 can also control the steering motor 25 via a built-in control unit.

[0037] In one embodiment, the auxiliary drive controller 22 includes at least one of a first DC / DC converter, a second DC / DC converter, a first DC / AC converter, and a third DC / DC converter. The first DC / DC converter is electrically connected to the battery 30. The second DC / DC converter is connected to the air conditioner thermistor 31. The first DC / AC converter is connected to the air compressor 32. The third DC / DC converter is electrically connected to the air conditioner compressor 33. In other embodiments, at least one of the first DC / DC converter, the second DC / DC converter, the first DC / AC converter, and the third DC / DC converter in the auxiliary drive controller 22 may also be connected to other electrical equipment to supply power to those other electrical equipment.

[0038] This utility model also provides an electric mining vehicle, including the power supply system as described above, and electric drive systems 2 and 2'.

[0039] In one embodiment, the electric mining truck may be, but is not limited to, a wide-body mining dump truck. A wide-body mining dump truck is a heavy-duty transport vehicle specifically designed for open-pit mines, primarily used for rock and earth stripping and ore transport. Specifically, the electric mining truck may travel on long transport routes or on short routes such as loading and unloading areas.

[0040] In one embodiment, if the electric mining truck is traveling on a long transportation route, i.e., the entire vehicle is in overhead wire mode, then as follows Figure 3 As shown, the electric mining truck can receive the grid voltage provided by the high-voltage grid through the power receiving component 10, and after the grid voltage is stepped down by the high-voltage distribution cabinet 11, it is distributed to the electric drive system 2 and the high-voltage distribution box 12. Then, the high-voltage distribution box 12 outputs a charging voltage to charge the power battery pack 12 and supplies power to the radiator 14. Specifically, the main drive controller 20 receives the second grid voltage distributed by the high-voltage distribution cabinet 11 after stepping down the grid voltage, and outputs a first supply voltage to the first drive motor 21 and a third supply voltage to the steering motor 25. The auxiliary drive controller 22 receives the third grid voltage distributed by the high-voltage distribution cabinet 11 after stepping down the grid voltage, and outputs a second supply voltage to the second drive motor 24 through the second motor controller 23. It can also supply power to equipment such as the battery 30, the air conditioning thermistor 31, the air compressor 32, and the air conditioning compressor 33. In this way, even under heavy-load uphill conditions, the electric mining truck can be powered by the high-voltage power grid and provide greater torque output through the first drive motor 21 and the second drive motor 22, thereby meeting the requirements of power and driving force for heavy-load uphill conditions.

[0041] In one embodiment, if the electric mining truck is traveling on a short distance, i.e., the vehicle is in pure electric mode, then as follows: Figure 4As shown, the electric mining truck can be powered by the power battery pack 13. Specifically, the high-voltage distribution box 12 outputs the battery voltage from the power battery pack 13 to the electric drive system 2 through the high-voltage distribution cabinet 11, and powers the radiator 14. The high-voltage distribution cabinet 11 receives the battery voltage and outputs a first battery voltage to the main drive controller 20 and a second battery voltage to the auxiliary drive controller 22, thereby powering the first motor 21, the second motor 24, and the steering motor 25, etc.

[0042] In one implementation, if the vehicle is in regenerative braking mode, then as follows Figure 5 As shown, the electric mining truck can receive the regenerative braking energy output by the electric drive system 2 through the high-voltage distribution cabinet 11, and transmit the received regenerative braking energy to the power battery pack 13 through the high-voltage distribution box 12 to charge the power battery pack 13, or transmit the received regenerative braking energy to the high-voltage power grid through the power receiving component 10 to supply power to other vehicles through the high-voltage power grid, or store the regenerative braking energy through the built-in on-board capacitor.

[0043] In one embodiment, if the vehicle is in a stopped and non-operating state, it can enter charging mode. The electric mining truck can receive voltage from the charging equipment through the charging interface 121 on the high-voltage distribution box 12, thereby charging the power battery pack 13.

[0044] The power supply system and electric mining truck of this invention include: a power receiving component 10, a high-voltage distribution cabinet 11, a high-voltage distribution box 12, and a power battery pack 13. Therefore, it can receive grid voltage provided by the high-voltage power grid through the power receiving component 10 or output battery voltage through the power battery pack 13, and output it to the electric drive system 2 through the high-voltage distribution cabinet 11. Thus, the power supply system and electric mining truck of this invention can improve the driving range of the electric mining truck, thereby improving its operational efficiency and flexibility.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A power supply system characterized by comprising: include: Power receiving components, high-voltage switchgear, high-voltage distribution boxes, and power battery packs; The power receiving component is detachably electrically connected to the high-voltage power grid and electrically connected to the high-voltage distribution cabinet, for receiving the grid voltage provided by the high-voltage power grid and transmitting the grid voltage to the high-voltage distribution cabinet; The high-voltage distribution cabinet is electrically connected to the electric drive system and the high-voltage distribution box, and is used to step down the grid voltage and distribute it to the electric drive system and the high-voltage distribution box. The high-voltage distribution box is electrically connected to the power battery pack, and is used to receive the first grid voltage distributed by the high-voltage distribution cabinet and output the charging voltage to the power battery pack. It is also used to output the battery voltage output by the power battery pack to the electric drive system through the high-voltage distribution cabinet.

2. The power supply system according to claim 1, characterized by The power receiving component includes a pantograph and a first switch assembly; The pantograph is electrically connected to the high-voltage power grid. The first switching assembly is located in the energy recovery circuit of the pantograph and is used to disconnect or connect the energy recovery circuit of the pantograph, and when connected, transmit the received braking energy recovery to the high-voltage power grid.

3. The power supply system according to claim 2, characterized in that, The high-voltage distribution cabinet includes a contactor, which is used to identify whether the power receiving component is electrically connected to the high-voltage power grid.

4. The power supply system according to claim 1, characterized in that, The high-voltage distribution cabinet includes an on-board capacitor and a second switch assembly. The vehicle-mounted capacitor is electrically connected to the second switching assembly; The second switching assembly is located in the energy recovery circuit of the vehicle capacitor, and is used to disconnect or connect the energy recovery circuit of the vehicle capacitor. When connected, it transmits the received braking energy recovery to the vehicle capacitor so that the vehicle capacitor can be charged.

5. The power supply system according to any one of claims 1 to 4, characterized in that, The power system also includes a third switching assembly; The third switch assembly is located in the energy recovery circuit of the power battery pack, and is used to disconnect or connect the energy recovery circuit of the power battery pack. When connected, it outputs the received braking recovery energy to the power battery pack so that the power battery pack can be charged.

6. An electric mining vehicle, characterized in that, The electric mining truck includes the power supply system and the electric drive system as described in any one of claims 1 to 5.

7. The electric mining vehicle according to claim 6, characterized in that, The electric drive system includes a motor control module, a first drive motor, and a second drive motor; The motor control module is electrically connected to the high-voltage distribution cabinet and is used to receive the grid voltage distributed by the high-voltage distribution cabinet after stepping down the grid voltage, or to receive the battery voltage output by the high-voltage distribution box through the high-voltage distribution cabinet, and output a first power supply voltage to the first drive motor and a second power supply voltage to the second drive motor. The first drive motor is used to receive the first power supply voltage and output the first drive torque to drive the middle bridge; The second drive motor is used to receive the second power supply voltage and output the second drive torque to drive the rear axle.

8. The electric mining vehicle according to claim 7, characterized in that, The motor control module includes a main drive controller, an auxiliary drive controller, and a second motor controller. The main drive controller is used to receive the second grid voltage distributed by the high-voltage distribution cabinet after the grid voltage is stepped down, or to receive the first battery voltage output by the high-voltage distribution box through the high-voltage distribution cabinet, so as to output the first power supply voltage to the first drive motor. The auxiliary drive controller is used to receive the third grid voltage distributed by the high-voltage distribution cabinet after stepping down the grid voltage, or to receive the second battery voltage output by the high-voltage distribution box through the high-voltage distribution cabinet, so as to output the second power supply voltage to the second drive motor through the second motor controller.

9. The electric mining vehicle according to claim 8, characterized in that, The electric drive system also includes a steering motor; The main drive controller is also electrically connected to the steering motor and is used to output a third power supply voltage to the steering motor.

10. The electric mining vehicle according to claim 8, characterized in that, The auxiliary drive controller includes at least one of a first DC / DC converter, a second DC / DC converter, a first DC / AC converter, and a third DC / DC converter; The first DC / DC converter is electrically connected to the battery; The second DC / DC converter is connected to the air conditioner thermistor; The first DC / AC converter is connected to the air compressor; The third DC / DC converter is electrically connected to the air conditioner compressor.

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