CN114714924A - Dual-source power supply system of pure electric mining truck, mining truck and application method - Google Patents

Dual-source power supply system of pure electric mining truck, mining truck and application method Download PDF

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Publication number
CN114714924A
CN114714924A CN202210375776.6A CN202210375776A CN114714924A CN 114714924 A CN114714924 A CN 114714924A CN 202210375776 A CN202210375776 A CN 202210375776A CN 114714924 A CN114714924 A CN 114714924A
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mining truck
pure electric
power
electric mining
module
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王田
袁云刚
庞帅
石显接
罗伟华
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Sinohydro Bureau 8 Co Ltd
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    • 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
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/20—Details of contact bow
    • B60L5/205—Details of contact bow with carbon contact members
    • 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
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/22—Supporting means for the contact bow
    • B60L5/28—Devices for lifting and resetting the collector
    • 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
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • 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
    • B60L2200/36—Vehicles designed to transport cargo, e.g. trucks
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a dual-source power supply system of a pure electric mining truck, the mining truck and an application method. The invention aims to solve the technical problems of short endurance mileage and insufficient transportation efficiency of the existing pure electric mining truck, can improve the endurance capacity of the mine pure electric mining truck, improves the production efficiency, and can achieve the purposes of green zero emission and all-weather uninterrupted operation.

Description

Dual-source power supply system of pure electric mining truck, mining truck and application method
Technical Field
The invention relates to the technology of new energy automobiles, in particular to a dual-source power supply system of a pure electric mining truck and an application method thereof.
Background
On the road of promoting green mine construction, harnessing haze PM2.5 becomes powerful power and pressure of automobile electromotion, and zero pollution and zero emission are the only options. Therefore, the pure electric mining truck is adopted for mining transportation, and the de-fuel electric operation of the mining truck is irreversible. However, the pure electric mining truck is limited by the energy storage of the storage battery, how to reduce the charging times during the operation, complete the production task, and improve the endurance mileage of the vehicle becomes the bottleneck of mine electric promotion. At present, the problem of increasing the battery pack is mainly solved, but because the battery pack is heavy in mass, high in cost and large in size, a lot of potential safety hazards exist in mechanical accumulation and stacking of the battery pack, and long-term stable operation of a vehicle is not facilitated. Therefore, it is very necessary to provide a dual-source power supply method and system with high automation degree, high working efficiency and easy operation.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems in the prior art, the invention provides a pure electric mining truck dual-source power supply system, a mining truck and an application method, aims to solve the technical problems of short endurance mileage and insufficient transportation efficiency of the existing pure electric mining truck, can improve the endurance capacity of the mine pure electric mining truck, improves the production efficiency, and achieves green zero emission, all-weather and uninterrupted operation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a pure electric mining truck dual-power supply system, includes bow net receiving module, DC AC module, energy recuperation module, first charge/outage control module, the module of charging, power battery group and second charge/outage control module, bow net receiving module is used for linking to each other in order to obtain outside power supply and is the motor M power supply of pure electric mining truck as first power through DC AC module as outside contact net, power battery group is used for being the motor M power supply of pure electric mining truck as second power, energy recuperation module links to each other and the output links to each other through first charge/outage control module, charging module, power battery group in order to utilize the energy of retrieving to charge for power electricity with the motor M power of pure electric mining truck, the output of bow net receiving module still links to each other through second charge/outage control module and charging module in order to utilize the electric wire netting to charge for power battery group .
Optionally, the pantograph-catenary power receiving module comprises a trolley pole, a trolley head, a carbon brush and a lifting driving mechanism, the trolley pole comprises two sections of hinged connecting rods, the lifting driving mechanism is connected between the connecting rods at two ends, the trolley head is installed at the top end of the trolley pole, and the carbon brush is installed at the top of the trolley head and used for contacting with a contact network to obtain a power supply of a power grid.
In addition, the invention also provides a pure electric mining truck which comprises a pure electric mining truck body with the motor M, wherein the pure electric mining truck body is internally provided with the pure electric mining truck double-source power supply system.
In addition, the invention also provides an application method of the pure electric mining truck, which comprises the following steps: when the pure electric mining truck is in heavy load uphill, the pantograph-catenary power receiving module is connected with an external catenary to obtain external power supply, the pantograph-catenary power receiving module serves as a first power supply to supply power to a motor M of the pure electric mining truck through the DC/AC module, and meanwhile the pantograph-catenary power receiving module is connected with the charging module through the second charging/power-off control module to charge the power battery pack by utilizing a power grid; when the pure electric mining truck is lightly loaded and descends, the energy recovery module charges the power battery pack with the recovered energy from the motor M of the pure electric mining truck through the first charging/disconnecting control module and the charging module; when the pure electric mining truck is located in a non-contact network area outside an uphill slope and a downhill slope, the power battery pack is used for supplying power to a motor M of the pure electric mining truck so as to drive the pure electric mining truck.
Optionally, the method further comprises the step of determining a parameter of an electric machine M of the electric-only mining truck, the parameter of the electric machine M of the electric-only mining truck comprising a maximum torque or a rated torque, and the step of determining the maximum torque or the rated torque comprises: based on the maximum climbing angle of the pure electric mining truck or the actual climbing angle of the mining area, determining the maximum torque or the rated torque of a motor M of the pure electric mining truck according to the following formula:
Figure BDA0003590683000000021
in the above formula, α is the maximum climbing angle of the pure electric mining truck or the actual climbing angle of the mining area, and when α is the maximum climbing angle of the pure electric mining truck, T istqThe maximum torque of a motor M of the pure electric mining truck; when alpha is the actual climbing angle of the mining area of the pure electric mining truck, TtqThe rated torque of a motor M of the pure electric mining truck; i.e. igIs the speed ratio of a gearbox of a pure electric mining truck, i0Is the main reduction ratio eta of the pure electric mining truckdThe transmission efficiency of the pure electric mining truck is shown, m is the whole vehicle mass of the pure electric mining truck, g is the gravity acceleration, r is the tire radius of the pure electric mining truck, and f is the ramp resistance.
Optionally, the parameter of the electric machine M of the electric-only mining truck comprises a maximum rotation speed or a rated rotation speed, and the step of determining the maximum rotation speed or the rated rotation speed comprises: based on the maximum driving speed or the rated driving speed of the pure electric mining truck, determining the maximum rotating speed or the rated rotating speed of a motor M of the pure electric mining truck according to the following formula:
Figure BDA0003590683000000031
in the above formula, V is the maximum driving speed or the rated driving speed of the pure electric mining truck, and when V is the maximum driving speed of the pure electric mining truck, n is the maximum rotation speed of the motor M of the pure electric mining truck; when V is the rated running speed of the pure electric mining truck, n is the rated rotating speed of a motor M of the pure electric mining truck; r is the tire radius of the pure electric mining truck, igIs the speed ratio of a gearbox of a pure electric mining truck, i0The main reduction ratio of the pure electric mining truck is provided.
Optionally, the method further comprises the step of determining parameters of the power battery pack, wherein the parameters of the power battery pack comprise the battery capacity n required for meeting the maximum output power requirement of the motor M of the pure electric mining truckbatThe calculation function expression is as follows:
Figure BDA0003590683000000032
in the above formula, P is the output power of the battery, PbdmaxPower, η, supplied to the power battery pack at the minimum allowable state of chargemcThe efficiency of the motor M and the controller thereof of the pure electric mining truck is improved.
Optionally, the calculation function expression of the power provided by the power battery pack at the minimum allowable state of charge is as follows:
Figure BDA0003590683000000033
in the above formula, EbatIs the electromotive force of the power battery, Rbat0Is the equivalent internal resistance of the power battery pack.
Optionally, the method further comprises the step of determining a power parameter of the DC/AC module, wherein the output power of the DC/AC module is not less than the power demand P when the pure electric mining truck runs1And power demand P when charging the power battery pack2Sum of both, and power demand P1The formula of the calculation function is:
Figure BDA0003590683000000041
in the above formula, η is the efficiency of the power transmission system of the whole truck, m is the whole truck mass of the pure electric mining truck, g is the gravitational acceleration, crIs a rolling resistance coefficient, VmaxIs the maximum driving speed of the pure electric mining truck, and A is the windward area (m) of the electric mining truck2)，CdIs the air resistance coefficient.
Optionally, the power demand P2The formula of the calculation function is:
Figure BDA0003590683000000042
in the above formula, etacFor charging efficiency, QaIs rated capacity of power battery, StTo output capacitance, vaverageIs the average running speed of the pure electric mining truck, SzThe input capacitance is.
Compared with the prior art, the invention mainly has the following advantages: the invention uses the pantograph and catenary power receiving module as a first path of power supply to supply power for the motor M of the pure electric mining truck, uses the power battery pack as a second path of power supply to supply power for the motor M of the pure electric mining truck, and can use the energy recovery module and the pantograph and catenary power receiving module to charge the power battery pack, the pure electric mining truck can be driven by different power sources under different road conditions, can be charged and powered to run by carrying a contact network through a pantograph, can be powered by a power battery pack system, and can be reversely charged by energy recovery during downhill sliding and braking, therefore, the problems of insufficient endurance capacity and low production efficiency of the mine pure electric mining truck can be solved, the endurance capacity of the mine pure electric mining truck can be improved, the production efficiency can be improved, and the purposes of green zero emission and all-weather uninterrupted operation can be achieved. The invention greatly improves the adaptability of the electric car in the field of mine transportation, completely removes petroleum for mining, paves roads electrically and intelligently for the first time, realizes that a pantograph power taking system moves to a heavy truck and a contact network power supply system moves to a mine for the first time, realizes that mining moves to green and intelligent, leads the development direction of the whole industry, and has great demonstration significance.
Drawings
Fig. 1 is a schematic structural diagram of a dual-source power supply system of a pure electric mining truck according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a pantograph-catenary power receiving module according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a basic principle of an application method of a dual-source power supply system according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the dual-power supply system of the pure electric mining truck in this embodiment includes a pantograph-catenary power receiving module 1, a DC/AC module 2, an energy recovery module 3, a first charging/disconnecting control module 4, a charging module 5, a power battery pack 6, and a second charging/disconnecting control module 7, where the pantograph-catenary power receiving module 1 is configured to be connected to an external catenary to obtain external power and to be used as a first power source to supply power to a motor M of the pure electric mining truck through the DC/AC module 2, the power battery pack 6 is configured to be used as a second power source to supply power to the motor M of the pure electric mining truck, the energy recovery module 3 is connected to the motor M of the pure electric mining truck, and an output end of the energy recovery module is connected to the power battery pack 6 through the first charging/disconnecting control module 4, the charging module 5, and the power battery pack 6 to charge the power battery pack 6 by using recovered energy, the output end of the pantograph-catenary current-collecting module 1 is also connected with the charging module 5 through a second charging/disconnecting control module 7 so as to charge the power battery pack 6 by utilizing a power grid.
The integrated power supply cabinet is characterized by further comprising an integrated power supply cabinet, wherein the first charging/discharging control module 4 and the second charging/discharging control module 7 are both arranged in the integrated power supply cabinet, so that the integrated power supply cabinet serves as a whole vehicle power supply control center; the power battery pack 6 is stored in the comprehensive power cabinet, and the pantograph and catenary power receiving module 1 and the energy recovery module 3 are respectively connected with the comprehensive power cabinet and are freely switched by the charging/power-off system as required. For example: under the working conditions of heavy load and uphill, the pantograph-catenary power receiving module 1 and a contact network can be used for supplying power, so that the problems of high electric energy consumption and insufficient power in climbing are solved; in a turning and parking place, the power battery pack 6 supplies power, so that the difficulty in laying a power grid is reduced, and the flexibility is realized; the pantograph-catenary power receiving module 1 and a catenary power supply period have the function of charging the power battery pack 6, so that the waiting time for charging a pure electric car is eliminated, and the attendance rate of equipment is improved; when braking is carried out on a downhill, energy recovery is carried out through the energy recovery module 3, and the overall economic benefit is improved.
Pantograph current collection is a common electrical contact component of rail trains. In this embodiment, the characteristics of a pure electric mining truck are modified, as shown in fig. 2, the pantograph-catenary power receiving module 1 in this embodiment includes a trolley pole 11, a trolley head 12, a carbon brush 13 and a lifting driving mechanism 14, the trolley pole 11 includes two sections of connecting rods hinged together, the lifting driving mechanism 14 is connected between the connecting rods at two ends, the trolley head 12 is installed at the top end of the trolley pole 11, the carbon brush 13 is installed at the top of the trolley head 12 to be in contact with a contact network to obtain a power supply of a power grid, and is connected to a direct-current power grid through the carbon brush 13 being pressed on an overhead power grid, that is, direct current on the overhead power grid can be communicated to the DC/AC module 2 through a high-voltage line, so as to supply power to a whole vehicle.
The DC/AC module 2 is used for realizing direct current and alternating current conversion so as to convert the direct current on the overhead line network into alternating current and supply power to the pure electric mining truck. The DC/AC module 2 needs to satisfy both the power demand for vehicle travel and the power demand for charging of the power battery. With the exception of the DC/AC module 2, all power components are protected from battery clamp pressure downstream of the power battery pack 6.
The energy recovery module 3 is an existing device for achieving regenerative braking energy recovery.
The first charging/discharging control module 4 is for implementing charging/discharging control.
The charging module 5 is used for charging the power battery pack 6.
In the embodiment, the power battery pack 6 adopts a lithium iron phosphate battery, and the battery has high energy density, can be charged/discharged at a short time and 2C rate, and can meet the requirements of dynamic property and driving range of the vehicle during off-line.
The second charge/discharge control module 7 is for implementing charge/discharge control.
In the embodiment of full-power braking, a chopping brake is not required to be integrated on a direct-current bus, only the DC/AC module 2 has input surge during lapping, and the surge can be avoided through a pre-charging circuit.
In addition, this embodiment still provides a pure electric mining truck, including the pure electric mining truck body that has motor M, is equipped with the two source power supply systems of pure electric mining truck in the preceding of this embodiment in the pure electric mining truck body to can realize the two source power supplies for motor M. The core parameter indexes of the motor M are torque and rotating speed, and the rated and peak torque of the motor are required to meet the dynamic requirements of maximum climbing and continuous maximum climbing of the vehicle, and specifically, the rated torque of the motor M in the embodiment should not be lower than 1382N.m, and the rated rotating speed is 1682 rpm.
As shown in fig. 3, this embodiment further provides an application method of the foregoing pure electric mining truck, including: when the pure electric mining truck goes up a slope in a heavy load mode, the pantograph and catenary power receiving module 1 is connected with an external contact net to obtain external power supply, the direct current/alternating current (DC/AC) module 2 is used as a first power supply to supply power to a motor M of the pure electric mining truck, and meanwhile the pantograph and catenary power receiving module is connected with the charging module 5 through the second charging/disconnecting control module 7 to be used for charging the power battery pack 6 by using a power grid; when the pure electric mining truck is in a light-load downhill state, the energy recovery module 3 charges a power battery pack 6 with recovered energy from a motor M of the pure electric mining truck through a first charging/disconnecting control module 4 and a charging module 5; when the pure electric mining truck is located in a non-contact network area outside an uphill slope and a downhill slope, the power battery pack 6 is used for supplying power to a motor M of the pure electric mining truck so as to drive the pure electric mining truck.
In the embodiment, the motor M and the controller perform matching calculation based on the parameters of the whole pure electric mining truck. Because the power of the overhead wire network is limited, the driving and charging module 5 of the whole vehicle can be cooperatively controlled with the DC/AC module 2, the safety of the overhead wire network is ensured, and the phenomenon that the power requirement on the same section of the wire network is too high, so that the voltage of the overhead wire network is too low is avoided.
The method further comprises the step of determining parameters of a motor M of the electric mining truck, the parameters of the motor M of the electric mining truck comprise a maximum torque or a rated torque, and the step of determining the maximum torque or the rated torque comprises: based on the maximum climbing angle of the pure electric mining truck or the actual climbing angle of the mining area, determining the maximum torque or the rated torque of a motor M of the pure electric mining truck according to the following formula:
Figure BDA0003590683000000071
in the above formula, α is the maximum climbing angle of the pure electric mining truck or the actual climbing angle of the mining area, and when α is the maximum climbing angle of the pure electric mining truck, T istqThe maximum torque of a motor M of the pure electric mining truck; when alpha is the actual climbing angle of the mining area of the pure electric mining truck, TtqThe rated torque of a motor M of the pure electric mining truck; i.e. igIs the speed ratio of a gearbox of a pure electric mining truck, i0Is the main reduction ratio eta of the pure electric mining truckdThe transmission efficiency of the pure electric mining truck is shown, m is the whole vehicle mass of the pure electric mining truck, g is the gravity acceleration, r is the tire radius of the pure electric mining truck, and f is the ramp resistance. Specifically, in this embodiment, according to the maximum climbing gradient in the parameter table of the entire vehicle and the continuous climbing gradient requirement of the actual working condition, the rated torque of the motor calculated according to the above formula should not be lower than 1382 n.m.
The rated and peak rotating speed of the motor M meet the requirements of the highest vehicle speed and the continuous highest vehicle speed. In this embodiment, the parameter of the motor M of the all-electric mining truck includes a maximum rotation speed or a rated rotation speed, and the step of determining the maximum rotation speed or the rated rotation speed includes: based on the maximum driving speed or the rated driving speed of the pure electric mining truck, determining the maximum rotating speed or the rated rotating speed of a motor M of the pure electric mining truck according to the following formula:
Figure BDA0003590683000000072
in the above formula, V is the maximum driving speed or rated driving speed of the pure electric mining truckSpeed, when V is the maximum driving speed of the pure electric mining truck, n is the maximum rotating speed of a motor M of the pure electric mining truck; when V is the rated running speed of the pure electric mining truck, n is the rated rotating speed of a motor M of the pure electric mining truck; r is the tire radius of the pure electric mining truck, igIs the speed ratio of a gearbox of a pure electric mining truck, i0The main reduction ratio of the pure electric mining truck is provided. Specifically, in this embodiment, according to the maximum vehicle speed requirement in the finished vehicle parameter table and the continuous maximum vehicle speed requirement of the actual working condition, the rated rotation speed of the motor is calculated according to the above formula to be 1682 rpm. And (3) matching according to a market motor type spectrum, and determining the final motor M parameters as follows:
table 1: a parameter table of the motor M.
Serial number Item Parameter(s)
1 Rated/maximum torque (N.m) 1330/2800
2 Rated/peak speed (rpm) 1700/3500
3 Rated/maximum power (kW) 250/350
The selection of the number of the batteries needs to meet the power requirement of the mine card for running, and also needs to ensure that the mine card can provide the power requirement of acceleration or climbing for the mine card under the condition that the battery discharge reaches a certain depth. Accordingly, the present embodiment also includes the step of determining parameters of power battery pack 6, the parameters of power battery pack 6 including a battery capacity n required to meet a maximum output power demand of motor M of the electric mining truckbatThe calculation function expression is as follows:
Figure BDA0003590683000000081
in the above formula, P is the output power of the battery, PbdmaxThe power provided by the power battery pack 6 under the minimum allowable state of charge, etamcThe efficiency of the motor M and the controller thereof of the pure electric mining truck is improved.
The voltage characteristics of a lithium iron phosphate battery can be expressed as:
Ebat＝Ubat+Rbat0.Ibat
in the above formula, EbatIs the electromotive force (V), U of the power battery pack 6batIs the operating voltage (V), R of the power battery pack 6bat0Is the equivalent internal resistance (omega), I of the power battery pack 6batIs the operating current (a) of the power battery pack 6. In general, Ebat、Rbat0Are all working currents IbatAnd a function Of the current electric quantity state value SOC (State Of Charge), and the worst working state Of the battery is considered when calculating the battery. Assuming the minimum allowable operating state value (SOClow) for which the SOC is set, the corresponding electromotive force EbatAnd battery equivalent internal resistance Rbat0The maximum power at which the battery discharges is calculated. The discharge efficiency of the lithium iron phosphate battery is as follows:
Figure BDA0003590683000000082
the high working efficiency of the storage battery can be ensured from the discharge efficiency of the lithium iron phosphate storage battery. Therefore, in practical applications, the maximum output power of a lithium iron phosphate battery should be limited to:
Figure BDA0003590683000000083
when calculating the maximum output power of a single battery, the maximum output power should be calculated by selecting the battery with the worst SOC, that is, generally, when the SOC is 0.1. Thus, the computational function expression of the power provided by the power battery 6 at the minimum allowable state of charge is:
Figure BDA0003590683000000091
in the above formula, EbatIs the electromotive force of the power battery pack 6, Rbat0Is the equivalent internal resistance of the power battery pack 6.
Therefore, the battery capacity required to meet the maximum output power demand of the motor can be calculated by:
Figure BDA0003590683000000092
in the above formula, P is the output power of the battery, PbdmaxThe power provided by the power battery pack 6 under the minimum allowable state of charge, etamcThe efficiency of the motor M and the controller thereof of the pure electric mining truck is improved. In this example, the battery parameters for the power battery pack 6 are determined by calculation and matching with reference to the market product type spectrum as follows:
table 2: battery parameters of the power battery pack 6.
Serial number Index (I) Parameter(s)
1 Type (B) Lithium iron phosphate
2 Voltage platform (Range) (V) 576
3 Battery capacity (kWh) 105
The DC/AC module 2 needs to meet both the power demand for vehicle travel and the charging power demand of the power battery 6. The method further comprises the step of determining the power parameter of the DC/AC module 2, wherein the output power of the DC/AC module 2 is not less than the power requirement P when the pure electric mining truck runs1And the power demand P when charging the power battery pack 62Sum of both, and power demand P1The calculation function expression of (a) is:
Figure BDA0003590683000000093
in the above formula, η is the efficiency of the power transmission system of the whole truck, m is the whole truck mass of the pure electric mining truck, g is the gravitational acceleration, crIs a rolling resistance coefficient, VmaxIs the maximum driving speed of the pure electric mining truck, and A is the windward area (m) of the electric mining truck2)，CdIs the air resistance coefficient.
In this embodiment, the power requirement P2The formula of the calculation function is:
Figure BDA0003590683000000101
in the above formula, etacFor charging efficiency, QaIs rated capacity of power battery, StTo output capacitance, vaverageIs the average running speed of the pure electric mining truck, SzThe input capacitance is. Calculated and matched against the market product type spectrum, the product parameters of the finally selected DC/AC module 2 are as follows:
table 3: product parameter table for the DC/AC module 2.
Figure BDA0003590683000000102
The invention and its embodiments have been described above schematically, without this being limitative. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a two source power supply system of electricelectric moves mining truck, its characterized in that, includes bow net electric module (1), DC/AC module (2), energy recuperation module (3), first control module (4) that charge/cut off power supply, charging module (5), power battery group (6) and second control module (7) that charges/cut off power supply, bow net electric module (1) is used for linking to each other in order to obtain outside power supply and is the motor M power supply of electricelectric moves mining truck as first power through DC/AC module (2) with outside contact net, power battery group (6) are used for as the second power supply for electricelectric moves mining truck's motor M power supply, energy recuperation module (3) links to each other with electricelectric moves mining truck's motor M and the output passes through first control module (4) that charges/cut off power supply, charging module (5), The power battery pack (6) is connected to charge the power battery pack (6) by utilizing recovered energy, and the output end of the pantograph-catenary power receiving module (1) is also connected with the charging module (5) by a second charging/disconnecting control module (7) to charge the power battery pack (6) by utilizing a power grid.
2. The dual-source power supply system for the pure electric mining truck according to claim 1, characterized in that the pantograph-catenary power receiving module (1) comprises a trolley pole (11), a trolley head (12), a carbon brush (13) and a lifting driving mechanism (14), wherein the trolley pole (11) comprises two sections of connecting rods which are hinged, the lifting driving mechanism (14) is connected between the connecting rods at two ends, the trolley head (12) is installed at the top end of the trolley pole (11), and the carbon brush (13) is installed at the top of the trolley head (12) and is used for contacting with a catenary to obtain power of a power grid.
3. A pure electric mining truck comprising a pure electric mining truck body with an electric machine M, characterized in that the pure electric mining truck body is provided therein with the pure electric mining truck dual-source power supply system of claim 1 or 2.
4. A method of using the electric-only mining truck of claim 3, comprising: when the pure electric mining truck goes up a slope in a heavy load mode, the pantograph-catenary power receiving module (1) is connected with an external catenary to obtain external power supply, the pantograph-catenary power receiving module serves as a first power supply to supply power to a motor M of the pure electric mining truck through the DC/AC module (2), and meanwhile the pantograph-catenary power receiving module is connected with the charging module (5) through the second charging/disconnecting control module (7) to charge the power battery pack (6) through a power grid; when the pure electric mining truck is lightly loaded and descends, the energy recovery module (3) charges a power battery pack (6) with the recovered energy from a motor M of the pure electric mining truck through a first charging/disconnecting control module (4) and a charging module (5); when the pure electric mining truck is located in a non-contact network area outside an uphill slope and a downhill slope, the power battery pack (6) is used for supplying power to a motor M of the pure electric mining truck so as to drive the pure electric mining truck.
5. The method of applying an electric-only mining truck according to claim 4, further comprising the step of determining a parameter of electric machine M of the electric-only mining truck, the parameter of electric machine M of the electric-only mining truck comprising a maximum torque or a rated torque, and the step of determining the maximum torque or the rated torque comprising: based on the maximum climbing angle of the pure electric mining truck or the actual climbing angle of the mining area, determining the maximum torque or the rated torque of a motor M of the pure electric mining truck according to the following formula:
Figure FDA0003590682990000021
in the above formula, α is the maximum climbing angle of the pure electric mining truck or the actual climbing angle of the mining area, and when α is the maximum climbing angle of the pure electric mining truck, T istqThe maximum torque of a motor M of the pure electric mining truck; when alpha is the actual climbing angle of the mining area of the pure electric mining truck, TtqThe rated torque of a motor M of the pure electric mining truck; i.e. igIs the speed ratio of a gearbox of a pure electric mining truck, i0Is the main reduction ratio eta of the pure electric mining truckdThe transmission efficiency of the pure electric mining truck is shown, m is the whole vehicle mass of the pure electric mining truck, g is the gravity acceleration, r is the tire radius of the pure electric mining truck, and f is the ramp resistance.
6. The method of using a pure electric mining truck according to claim 5, characterized in that the parameters of the electric machine M of the pure electric mining truck comprise a maximum or rated rotational speed, and the step of determining the maximum or rated rotational speed comprises: based on the maximum driving speed or the rated driving speed of the pure electric mining truck, determining the maximum rotating speed or the rated rotating speed of a motor M of the pure electric mining truck according to the following formula:
Figure FDA0003590682990000022
in the above formula, V is the maximum driving speed or the rated driving speed of the pure electric mining truck, and when V is the maximum driving speed of the pure electric mining truck, n is the maximum rotation speed of the motor M of the pure electric mining truck; when V is the rated running speed of the pure electric mining truck, n is the rated rotating speed of a motor M of the pure electric mining truck; r is the tire radius of the pure electric mining truck, igIs the speed ratio of a gearbox of a pure electric mining truck, i0The main reduction ratio of the pure electric mining truck is provided.
7. Method of application of a pure electric mining truck according to claim 6, characterized in that it further comprises the step of determining parameters of the power battery pack (6), said parameters of the power battery pack (6) comprising the battery capacity n required to meet the maximum output power demand of the electric machine M of the pure electric mining truckbatThe calculation function expression is as follows:
Figure FDA0003590682990000031
in the above formula, P is the output power of the battery, PbdmaxThe power provided by the power battery pack (6) under the minimum allowable charge state, etamcThe efficiency of the motor M and the controller thereof of the pure electric mining truck is improved.
8. The method for applying a pure electric mining truck according to claim 7, characterized in that the computational function expression of the power supplied by the power battery pack (6) at the minimum allowable state of charge is:
Figure FDA0003590682990000032
in the above formula, EbatIs the electromotive force, R, of the power battery pack (6)bat0Is the equivalent internal resistance of the power battery pack (6).
9. Method of application of a pure electric mining truck according to claim 8, characterized in that it further comprises a step of determining power parameters of the DC/AC module (2), the output power of said DC/AC module (2) not being less than the power demand P when the pure electric mining truck is running1And the power demand P when the power battery pack (6) is charged2Sum of both, and power demand P1The formula of the calculation function is:
Figure FDA0003590682990000033
in the above formula, η is the efficiency of the power transmission system of the whole truck, m is the whole truck mass of the pure electric mining truck, g is the gravitational acceleration, crIs a rolling resistance coefficient, VmaxThe maximum running speed of the pure electric mining truck, A is the windward area of the electric mining truck, and C is the speed of the electric mining truckdIs the air resistance coefficient.
10. Method of application of a pure electric mining truck according to claim 9, characterized in that the power demand P2The formula of the calculation function is:
Figure FDA0003590682990000034
in the above formula, etacFor charging efficiency, QaIs rated capacity of power battery, StTo output capacitance, vaverageIs the average running speed of the pure electric mining truck, SzThe input capacitance is.
CN202210375776.6A 2022-04-11 2022-04-11 Dual-source power supply system of pure electric mining truck, mining truck and application method Pending CN114714924A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116811664A (en) * 2023-08-30 2023-09-29 新誉集团有限公司 Running control method and device for electric mine car
WO2024022660A1 (en) * 2022-07-29 2024-02-01 Siemens Mobility GmbH Road vehicle having a current collector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024022660A1 (en) * 2022-07-29 2024-02-01 Siemens Mobility GmbH Road vehicle having a current collector
CN116811664A (en) * 2023-08-30 2023-09-29 新誉集团有限公司 Running control method and device for electric mine car
CN116811664B (en) * 2023-08-30 2023-11-07 新誉集团有限公司 Running control method and device for electric mine car

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