CN115610212A - Pure mining alternating current dump truck driving system with power battery capable of being configured in modular mode - Google Patents

Pure mining alternating current dump truck driving system with power battery capable of being configured in modular mode Download PDF

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Publication number
CN115610212A
CN115610212A CN202211318848.XA CN202211318848A CN115610212A CN 115610212 A CN115610212 A CN 115610212A CN 202211318848 A CN202211318848 A CN 202211318848A CN 115610212 A CN115610212 A CN 115610212A
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vehicle
power supply
power
voltage
external power
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CN202211318848.XA
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Chinese (zh)
Inventor
张晓强
王谦
刘明
杨绍波
邱增华
孙卫阳
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Xiangtan Electric Manufacturing Group Heavy Duty Equipment Co ltd
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Xiangtan Electric Manufacturing Group Heavy Duty Equipment Co ltd
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Priority to CN202211318848.XA priority Critical patent/CN115610212A/en
Publication of CN115610212A publication Critical patent/CN115610212A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/53—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/40—Working vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The system comprises a vehicle control unit, an external power access system, a variable frequency driving system, a vehicle auxiliary operation system and a power system, wherein the external power access system, the variable frequency driving system, the vehicle auxiliary operation system and the power system are sequentially and electrically connected; by utilizing the invention, the modular configuration of the power battery of the mining electric drive dump truck with the load of 110t to 300t or more can be realized, the configuration can be carried out according to the requirement of the vehicle on the electric quantity of the power battery, the pure electric operation of the vehicle is realized, the fuel consumption of a mine is reduced, the production cost of the mine is reduced, and the green development of the mine is realized.

Description

Pure mining alternating current dump truck driving system with power battery capable of being configured in modular mode
Technical Field
The invention relates to a pure electric mining alternating current dump truck driving system, in particular to a pure electric mining alternating current dump truck driving system with a power battery capable of being configured in a modularized mode.
Background
At present, large-scale mining dump trucks with the load of 110t to 300t and above are widely applied to large-scale strip mining and the construction of water conservancy and hydropower facilities, and undertake the transportation tasks of minerals and earthwork. The power source of the early large mining dump truck mainly uses a diesel engine as power, and the transmission mode of the truck mainly comprises mechanical transmission in which the diesel engine drives a rear wheel to rotate through a gearbox, or electric transmission in which the diesel engine drives a generator to generate electricity and the rear wheel is driven to rotate through electric energy. In any driving mode, a diesel engine is used as a power source.
In recent years, with the development of new energy industry, pure electric substitution of a power system of a mining dump truck with the load of less than 110t and 110t is realized, and pure electric substitution of the power system of a vehicle is difficult to realize on a large-scale mining dump truck with the vehicle load of more than 110t to 300t and above. The reason is as follows: (1) The bus voltage of the large mining dump truck is over 1000V, and the large mining dump truck can be realized at a large cost by the technical state of the current lithium battery; (2) The problem of voltage sharing of the battery pack caused by direct parallel connection of a plurality of branch batteries is difficult to solve, and the requirement of vehicle driving power cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a pure electric mining alternating current dumper driving system with a power battery capable of being configured in a modularized manner.
The technical scheme adopted for solving the technical problems is that the pure electric mining alternating current dump truck driving system with the power battery capable of being configured in a modularized mode comprises a vehicle control unit, an external power supply access system, a variable frequency driving system, a vehicle auxiliary operation system and a power system which are sequentially and electrically connected, wherein the vehicle control unit monitors the running states of the power system, the variable frequency driving system, the external power supply access system and the vehicle auxiliary operation system in real time through a CAN communication bus and sends control instructions to the systems according to the operating instructions of a driver and the states of the systems to enable the systems to work cooperatively;
the power system consists of a plurality of power submodules, and each submodule consists of a power battery pack, a battery thermal management system, a battery high-voltage power distribution cabinet and a bidirectional DCDC; the power system can carry out configuration of a plurality of power sub-modules according to different requirements of the pure electric mining dump truck with different loads on electric quantity and power, and the battery types and the battery rated voltage grades of each power sub-module and other power battery sub-modules can be different. The vehicle control unit has an energy management function, and controls the discharge power of the bidirectional DCDC by each battery pack according to the SOC of each battery pack when the vehicle runs by collecting the SOC of each battery pack, so that the aim of equalizing the residual electric quantity of each battery pack in the discharge process is fulfilled finally; the output end of the power system is a whole vehicle high-voltage bus, and a power supply is provided for the variable-frequency driving system and the vehicle auxiliary operation system through the high-voltage bus;
the variable frequency driving system consists of a brake resistance box, a left wheel traction frequency converter, a right wheel traction frequency converter, a left wheel traction motor and a right wheel traction motor;
the vehicle auxiliary operation system consists of an auxiliary engine power supply, a hydraulic oil pump motor, an oil pump motor driver, a whole vehicle heat management system, a 24V low-voltage power supply system and a cabin air conditioning system; an auxiliary engine power supply reduces the voltage of a high-voltage power supply to a low-voltage power supply and releases the low-voltage power supply on a low-voltage bus, and an oil pump motor driver, a whole vehicle heat management system, a 24V low-voltage power supply system, a cabin air conditioning system and a battery heat management system are all powered by the low-voltage bus;
the output end of the external power supply access system is also a high-voltage bus, and an external power supply is accessed to the high-voltage bus.
Further, the external power access system comprises a main positive contactor, a main negative contactor, a pre-charging circuit, an external voltage sensor, a vehicle-mounted power receiving interface current sensor, a vehicle-mounted power receiving interface temperature sensor, a vehicle-mounted power receiving interface power sensor function and an external power supply system communication module; the external power supply access system is in butt joint with the external power supply system through the vehicle-mounted power receiving interface, the vehicle controller acquires connection state information of the vehicle-mounted power receiving interface and the external power supply system through the external voltage sensor, the vehicle-mounted power receiving interface temperature sensor and the vehicle-mounted power receiving interface force sensor, and reads parameters of the external power supply system through the external power supply system communication module to judge whether the external power supply can be started, if the external power supply can be started, the main contactor and the negative contactor are closed firstly, and then the pre-charging circuit is switched on. And when the voltage of the high-voltage bus is slightly lower than the voltage of the external power supply system, the external power supply is connected to the main positive contactor of the system, so that the high-voltage bus and the external power supply system are electrically butted.
Furthermore, the high-voltage bus is a physical connection entity of each system, and the power system releases energy to the high-voltage bus to provide a power supply for the variable-frequency driving system and the vehicle auxiliary operation system.
Further, brake resistance case, left wheel pull the converter, the right wheel pulls the converter carry on high-voltage bus: when the vehicle is towed, the left wheel towing frequency converter and the right wheel towing frequency converter respectively drive the left wheel towing motor and the right wheel towing motor to rotate so as to drive the vehicle to advance; when the vehicle is electrically braked, the left wheel traction motor and the right wheel traction motor are converted into generators, kinetic energy of the vehicle is converted into electric energy, and the electric energy is rectified by the left wheel traction frequency converter and the right wheel traction frequency converter respectively and then released to a high-voltage bus.
Furthermore, the output end of the bidirectional DCDC of each power battery submodule is connected in parallel to a high-voltage bus of the whole vehicle, and the rated voltage of the high-voltage bus and the rated voltage of each power battery submodule can be unequal.
Furthermore, the power system can carry out various power submodule configurations according to different requirements of the pure electric mining alternating current dump truck on the electric quantity and the power of the power system, so that the purpose of meeting the requirements on different electric quantities and power is achieved.
Furthermore, the external power supply access system can introduce an external power supply meeting requirements into a vehicle high-voltage bus, and the power battery can be charged through the bidirectional DCDC through the high-voltage bus. The left wheel traction frequency converter and the right wheel traction frequency converter can drive the vehicle to advance, and an auxiliary power supply can be used for supplying power to a vehicle auxiliary system, so that the external power supply of the vehicle can be supplied for running.
Furthermore, the vehicle control unit has an energy management function, calculates the electric quantity of each battery pack by acquiring the SOC of each battery pack, and controls the discharge power of the bidirectional DCDC when the vehicle is towed, so that the purpose of equalizing the SOC of each battery pack in the discharge process is finally achieved.
By utilizing the invention, the modularized configuration of the power battery of the mining electric drive dump truck with the load of 110t to 300t and above can be realized, the configuration can be carried out according to the requirement of the vehicle on the electric quantity of the power battery, and the pure electric operation of the vehicle can be realized. The external power supply access system can adopt a power grid erected along a road to supply power for the vehicle, so that the external power supply of the pure electric power vehicle can be supplied with power. The wide application of the invention is beneficial to reducing the mine fuel consumption, reducing the mine production cost and realizing the green development of the mine.
Drawings
Fig. 1 is a block diagram of the structure of the embodiment of the present invention.
In the figure: 01-a vehicle control unit, 02-an external power supply access system, 03-a variable frequency drive system, 04-a power system, 05-a vehicle auxiliary operation system, 06-a high-voltage bus, 07-a low-voltage bus, 08-a left wheel frequency converter, 09-a left wheel motor, 10-a right wheel frequency converter, 11-a right wheel motor, 12-a brake resistance box and 13-an auxiliary machine power supply. 14-oil pump motor driver, 15-oil pump motor, 16-24V low-voltage power supply system, 17-cabin air conditioning system, 18-whole vehicle thermal management system, 19-vehicle-mounted power receiving interface, 20-charging control cabinet, 21-battery pack, 22-power distribution cabinet, 23-bidirectional DCDC, 24-battery thermal management system and 25-power battery submodule. 26-a vehicle-mounted power receiving interface power sensor, 27-a vehicle-mounted power receiving interface temperature sensor, 28-an external voltage sensor, 29-a vehicle-mounted power receiving interface current sensor, 30-an external power supply access system main positive contactor, 31-an external power supply access system main negative contactor and 33-an external power supply system communication module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the present embodiment includes an external power supply access system 02, a variable frequency drive system 03, a vehicle auxiliary operation system 05, and a power system 04, which are electrically connected in sequence. The vehicle control system further comprises a vehicle control unit 01, wherein the vehicle control unit 01 monitors the running states of the power system 04, the variable frequency driving system 03, the external power access system 02 and the vehicle auxiliary operation system 05 in real time through a CAN communication bus, and sends control instructions to the systems according to the operating instructions of a driver and the states of the systems, so that the systems work cooperatively.
The vehicle control unit 01 is provided with a plurality of I/O interfaces and a CAN communication interface, is a central part of a vehicle control system, and is a core component for enabling a power system 04, a variable frequency driving system 03, an external power supply access system 02 and a vehicle auxiliary operation system 05 to work in a coordinated manner; the vehicle brake system is a main control component for realizing functions of vehicle running, regenerative braking, battery charging, fault diagnosis and processing, vehicle state monitoring and the like.
The vehicle controller 01 mainly collects information of an accelerator pedal and an electric brake pedal of the vehicle and various control switch signals on an instrument desk through an I/O interface, so that the operation intention of a driver is analyzed, and finally the operation intention is converted into control requirements on various systems of the whole vehicle. Meanwhile, the vehicle control unit detects the working states of the power system, the variable frequency driving system, the external power access system and the vehicle auxiliary operation system in real time through the CAN communication bus, and performs intelligent regulation and control to enable the working states to work cooperatively, and the specific structure of the vehicle control unit 01 is the prior art and is not described in detail herein.
The power system 04 is composed of a plurality of power submodules 25, and each submodule is composed of a power battery pack 21, a battery thermal management system 24, a battery high-voltage power distribution cabinet 22 and a bidirectional DCDC 23. The power system 02 can perform various power submodule configurations according to different requirements of the pure electric mining alternating current dump truck on electric quantity and power so as to achieve the purpose of meeting the requirements on different electric quantities and power.
The output end of the power system 04 is a high-voltage bus 06 of the whole vehicle, and a power supply is provided for the variable-frequency driving system 03 and the vehicle auxiliary operation system 05 through the high-voltage bus 06.
The variable frequency driving system 03 is composed of a brake resistance box 12, a left wheel traction frequency converter 08, a right wheel traction frequency converter 10, a left wheel traction motor 09 and a right wheel traction motor 11.
The vehicle auxiliary operation system 05 consists of an auxiliary machine power supply 13, a hydraulic oil pump motor 15, an oil pump motor driver 14, a whole vehicle thermal management system 18, a 24V low-voltage power supply system 16 and a cabin air conditioning system 17.
The external power access system 02 is composed of a high-voltage control cabinet 19 and a vehicle-mounted power receiving interface 20, the output end of the external power access system 02 is also a high-voltage bus 06, and an external power is accessed to the high-voltage bus 06.
The vehicle control unit 01 is a core component of the whole system, monitors the running states of the power system 04, the variable frequency driving system 03, the external power access system 02 and the vehicle auxiliary operation system 05, and sends control instructions to the systems according to the operating instructions of a driver and the states of the systems, so that the systems work cooperatively.
The power battery pack 21, the battery thermal management system 24 and the battery high-voltage power distribution cabinet 23 of each power battery submodule 25 are isolated 23 from the power battery packs 21, the battery thermal management systems 24 and the battery high-voltage power distribution cabinets of other power battery submodules, and the battery type and the rated voltage grade of each power battery submodule 25 can be different. The output end of the bidirectional DCDC 23 of each power battery submodule 25 is connected in parallel with a high-voltage bus 06 of the whole vehicle, and the rated voltage of the high-voltage bus 06 can be unequal to the rated voltage of each power battery submodule 25.
The power system 04 can perform configuration of various power sub-modules 25 according to different requirements of the pure electric mining alternating current dump truck on the electric quantity and power of the power system, so as to achieve the purpose of meeting the requirements on different electric quantities and power.
The vehicle control unit 01 has an energy management function, the vehicle control unit 01 calculates the electric quantity of each battery pack 21 by acquiring the SOC of each battery pack 21, and controls the discharge power of the bidirectional DCDC 23 according to the electric quantity of each battery pack when the vehicle is towed, so that the purpose that the SOCs of the battery packs 21 are equal in the discharge process is finally achieved;
the high-voltage bus 06 is a physical connection entity of each system, and the power system 04 releases energy to the high-voltage bus 06 to provide a power supply for the variable-frequency driving system 03 and the vehicle auxiliary operation system 05;
the brake resistance box 12, the left wheel traction frequency converter 08 and the right wheel traction frequency converter 10 in the frequency conversion driving system 03 are mounted on a high-voltage bus: when the vehicle is towed, the left wheel towing frequency converter 08 and the right wheel towing frequency converter 10 respectively drive the left wheel towing motor 09 and the right wheel towing motor 11 to rotate so as to drive the vehicle to move forwards; when the vehicle is braked, the left wheel traction motor 09 and the right wheel traction motor 11 are changed into generators, the kinetic energy of the vehicle is converted into electric energy, and then the electric energy is respectively rectified by the left wheel traction frequency converter 08 and the right wheel traction frequency converter 10 and then released onto the high-voltage bus 06;
when the vehicle brakes, the vehicle control unit 01 calculates the electric quantity of each battery pack 21 by acquiring the SOC of each battery pack 21, and accordingly each battery pack controls the charging power of the bidirectional DCDC 23, and releases the energy of the vehicle left wheel traction frequency converter 08 and the vehicle right wheel traction frequency converter 10 on the high-voltage bus 06 for recovery, so as to achieve the purpose of recovering the vehicle braking energy, and ensure that the SOC of each power battery pack 21 is equal in the recharging process.
If the power system 04 cannot recover all braking energy, the vehicle control unit 01 controls the high-voltage bus 06 to be connected with the braking resistor box 12, and the energy which cannot be recovered is released in a thermal mode, so that the vehicle is ensured to have enough electric braking force.
The auxiliary operation system 05 of the vehicle is characterized in that an auxiliary power supply 13 of the vehicle reduces the voltage of a high-voltage power supply into a low-voltage power supply and releases the low-voltage power supply on a low-voltage bus 07, and an oil pump motor driver 14, a whole vehicle thermal management system 18, a 24V low-voltage power supply system 16, a cabin air conditioning system 17 and a battery thermal management system 24 are all powered by the low-voltage bus.
The vehicle controller 01 monitors the vehicle state in real time, and in combination with an operation instruction of a driver, controls the hydraulic oil pump motor 15 through the oil pump motor driver 14 to provide power for a vehicle hydraulic system, controls the whole vehicle thermal management system 18 to work, and controls the cabin air conditioning system 17 to regulate the temperature of a driving cab.
The external power access system 02 may direct external satisfactory power to the vehicle high voltage bus 06 and the bi-directional DCDC 23 uses the energy on the high voltage bus 06 to charge the battery pack 21. The left wheel traction frequency converter 08 and the right wheel traction frequency converter 09 can also use the energy on the high-voltage bus 06 to drive the vehicle to move forward, and the auxiliary machine power supply 13 can also use the energy on the high-voltage bus 06 to supply power for the vehicle auxiliary operation system 05.
The external power access system 02 comprises a main positive contactor 30, a main negative contactor 31, a pre-charging circuit 32, an external voltage sensor 28, a vehicle-mounted power receiving interface current sensor 29, a vehicle-mounted power receiving interface temperature sensor 27, a vehicle-mounted power receiving interface force sensor 26 and an external power supply system communication module 33;
the external power access system 02 is in butt joint with an external power supply system through the vehicle-mounted power receiving interface 19, the vehicle controller 01 acquires connection state information of the vehicle-mounted power receiving interface 19 and the external power supply system through the external voltage sensor 28, the vehicle-mounted power receiving interface temperature sensor 27 and the vehicle-mounted power receiving interface power sensor 26, and reads parameters of the external power supply system through the external power supply system communication module 33 to judge whether the external power supply can be started, and if the external power supply can be started, the main contactor 31 and the negative contactor are closed firstly.
After the vehicle-mounted power receiving interface 19 is in butt joint with an external power supply system, if the bidirectional DCDC 23 is in a discharging state, the main negative contactor 31 of the external power access system is closed first, the discharging voltage of the bidirectional DCDC 23 is adjusted, and after the voltage of the high-voltage bus 06 is slightly lower than the voltage of the external power supply system, the main positive contactor 30 of the external power access system is connected, so that the high-voltage bus 06 and the external power supply system are electrically in butt joint.
After the vehicle-mounted power receiving interface 19 is in butt joint with an external power supply system, when the bidirectional DCDC 23 is in a shutdown state, the main negative contactor 31 of the external power supply access system is closed first, and then the pre-charging circuit 32 is started. When the voltage 06 of the high-voltage bus is slightly lower than the voltage of the external power supply system, the main positive contactor 30 of the external power supply access system is switched on, so that the high-voltage bus 06 and the external power supply system are electrically butted.
The embodiment can realize pure electric operation of a large-scale dump truck with the load of more than 110t to 300t and above for strip mine or water conservancy and hydropower construction, is beneficial to reducing the fuel consumption of a mine, reduces the production cost in the process of mine and water conservancy and hydropower construction, and simultaneously realizes green development of the mine.
Various modifications and variations of the present invention may be made by those skilled in the art, which are still within the scope of the present patent provided they are within the scope of the claims and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims (8)

1. The pure electric mining alternating current dump truck driving system with the power battery capable of being configured in a modularized mode comprises a whole vehicle controller and is characterized in that: the vehicle control unit monitors the running states of the power system, the variable frequency driving system, the external power access system and the vehicle auxiliary operation system in real time through a CAN communication bus, and sends control instructions to the systems according to the operating instructions of a driver and the states of the systems so that the systems work cooperatively;
the power system comprises a plurality of power sub-modules, and each sub-module consists of a power battery pack, a battery thermal management system, a battery high-voltage power distribution cabinet and a bidirectional DCDC; the vehicle control unit has an energy management function, controls the discharge power of each group of bidirectional DCDCDCDC by collecting the SOC of each battery pack when the vehicle runs, and finally achieves the purpose of equalizing the residual electric quantity of each battery pack in the discharge process; the output end of the power system is a whole vehicle high-voltage bus, and a power supply is provided for the variable-frequency driving system and the vehicle auxiliary operation system through the high-voltage bus;
the variable frequency driving system consists of a brake resistance box, a left wheel traction frequency converter, a right wheel traction frequency converter, a left wheel traction motor and a right wheel traction motor;
the vehicle auxiliary operation system consists of an auxiliary engine power supply, a hydraulic oil pump motor, an oil pump motor driver, a whole vehicle heat management system, a 24V low-voltage power supply system and a cabin air conditioning system; the auxiliary engine power supply reduces the voltage of the high-voltage power supply to a low-voltage power supply and releases the low-voltage power supply on a low-voltage bus, and an oil pump motor driver, a whole vehicle heat management system, a 24V low-voltage power supply system, a cabin air conditioning system and a battery heat management system are all powered by the low-voltage bus;
the output end of the external power supply access system is also a high-voltage bus, and an external power supply is accessed to the high-voltage bus.
2. The alternating-current dumper driving system for pure electric mines with the modularly configurable power batteries according to claim 1, wherein the alternating-current dumper driving system comprises: the external power supply access system comprises a main positive contactor, a main negative contactor, a pre-charging circuit, an external voltage sensor, a vehicle-mounted power receiving interface current sensor, a vehicle-mounted power receiving interface temperature sensor, a vehicle-mounted power receiving interface force sensor function and an external power supply system communication module; the external power supply access system is in butt joint with the external power supply system through the vehicle-mounted power receiving interface, the vehicle controller acquires connection state information of the vehicle-mounted power receiving interface and the external power supply system through the external voltage sensor, the vehicle-mounted power receiving interface temperature sensor and the vehicle-mounted power receiving interface force sensor, and reads parameters of the external power supply system through the external power supply system communication module to judge whether the external power supply can be started, if the external power supply can be started, the main negative contactor is closed firstly, then the pre-charging circuit is switched on, when the voltage of the high-voltage bus is slightly lower than the voltage of the external power supply system, the main positive contactor of the external power supply access system is switched on, and the high-voltage bus and the external power supply system are enabled to complete electrical butt joint.
3. A pure electric mining alternating current dump truck driving system with a modularly configurable power battery according to claim 1 or 2, characterized in that: the high-voltage bus is a physical connection entity of each system, and the power system releases energy to the high-voltage bus to provide a power supply for the variable-frequency driving system and the vehicle auxiliary operation system.
4. A pure electric mining alternating current dump truck driving system with a modularly configurable power battery according to claim 1 or 2, characterized in that: brake resistance case, left wheel pull converter, right wheel pull the converter and mount on high-voltage bus: when the vehicle is towed, the left wheel towing frequency converter and the right wheel towing frequency converter respectively drive the left wheel towing motor and the right wheel towing motor to rotate so as to drive the vehicle to advance; when the vehicle is electrically braked, the left wheel traction motor and the right wheel traction motor are converted into generators, kinetic energy of the vehicle is converted into electric energy, and the electric energy is rectified by the left wheel traction frequency converter and the right wheel traction frequency converter respectively and then released to a high-voltage bus.
5. A pure electric mining alternating current dump truck driving system with a modularly configurable power battery according to claim 1 or 2, characterized in that: the output end of the bidirectional DCDC of each power battery submodule is connected in parallel to a high-voltage bus of the whole vehicle, and the rated voltage of the high-voltage bus and the rated voltage of each power battery submodule can be unequal.
6. A pure electric mining alternating current dump truck driving system with a modularly configurable power battery according to claim 1 or 2, characterized in that: the power system can carry out various power submodule configurations according to different requirements of the pure electric mining alternating current dump truck on the electric quantity and the power of the power system, so that the requirements of vehicles with different loads on the electric quantity and the power are met.
7. A pure electric mining alternating current dump truck driving system with a modularly configurable power battery according to claim 1 or 2, characterized in that: the external power supply access system can introduce an external power supply meeting requirements into a vehicle high-voltage bus, the high-voltage bus can charge a power battery through a bidirectional DCDC, the vehicle can be driven to advance by a left-wheel traction frequency converter and a right-wheel traction frequency converter, and the auxiliary power supply can supply power to a vehicle auxiliary system through an auxiliary power supply, so that the external power supply of the vehicle can be powered and operated.
8. A pure electric mining alternating current dump truck driving system with a modularly configurable power battery according to claim 1 or 2, characterized in that: the vehicle control unit has an energy management function, calculates the electric quantity of each battery pack by acquiring the SOC of each battery pack, and controls the discharge power of the bidirectional DCDC when the vehicle is pulled, so that the purpose of equalizing the SOC of each battery pack in the discharge process is finally achieved.
CN202211318848.XA 2022-10-26 2022-10-26 Pure mining alternating current dump truck driving system with power battery capable of being configured in modular mode Pending CN115610212A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116373715A (en) * 2023-06-05 2023-07-04 湘电重型装备有限公司 Large-tonnage pure electric wheel dumper
CN116945919A (en) * 2023-09-21 2023-10-27 三一重型装备有限公司 Mine car high-voltage control system, method, electric mine car, equipment, medium and chip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116373715A (en) * 2023-06-05 2023-07-04 湘电重型装备有限公司 Large-tonnage pure electric wheel dumper
CN116945919A (en) * 2023-09-21 2023-10-27 三一重型装备有限公司 Mine car high-voltage control system, method, electric mine car, equipment, medium and chip

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