CN112412466B - Electric vehicle low-consumption surface mine exploitation method and electric vehicle electric energy feedback system - Google Patents
Electric vehicle low-consumption surface mine exploitation method and electric vehicle electric energy feedback system Download PDFInfo
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- CN112412466B CN112412466B CN202011297094.5A CN202011297094A CN112412466B CN 112412466 B CN112412466 B CN 112412466B CN 202011297094 A CN202011297094 A CN 202011297094A CN 112412466 B CN112412466 B CN 112412466B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010248 power generation Methods 0.000 claims description 32
- 239000004575 stone Substances 0.000 claims description 4
- 238000005422 blasting Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 5
- 230000001174 ascending effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005381 potential energy Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
-
- 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
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
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- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
According to the electric vehicle low-consumption surface mine exploitation method and the electric vehicle electric energy feedback system, the mining platform and the road are better combined through the three-dimensional parallel propulsion mining mode, the transportation distance of the electric vehicle is shortened, and the storage battery energy is timely supplemented on a downhill slope, so that the service life of the storage battery is greatly prolonged, and the driving range is increased. Meanwhile, a strong braking force can be generated during charging, so that the abrasion of a brake pad can be reduced, the vehicle speed is automatically reduced, and the vehicle is safer to drive. The gradient of the mine road is controlled, so that complete gas-electric charging is achieved, potential energy difference between an ascending slope of an empty vehicle and a descending slope of a heavy vehicle is fully utilized for charging, energy conversion efficiency loss of the electric vehicle is compensated, and low-energy-consumption operation of the electric vehicle is achieved.
Description
Technical Field
The invention relates to an electric vehicle low-consumption surface mine exploitation method and an electric vehicle electric energy feedback system.
Background
The electric transport vehicle for the surface mine engineering is fixed in operation line, and a plurality of surface mine transport lines are load downhill and idle uphill; the electric vehicle of load can send sufficient electric energy when downhill, if not utilize and waste and fall quite unfortunately, if use the electric energy that produces when downhill at the electric vehicle in-process of going upslope to consume, then can realize that the vehicle realizes the state that electric vehicle energy is planned "zero" to consume in the transportation.
The energy feedback control of the electric vehicle generally determines the feedback electric quantity according to the battery charge state, when the battery charge state is higher, the feedback is not performed, in the prior art, the energy feedback control of the electric vehicle determines whether the energy is recovered according to the battery charge and the highest voltage of the single battery, but when the battery charge threshold of the electric vehicle reaches 100% in actual running, the single voltage still does not reach the charge cut-off threshold, so that the single voltage still performs the energy feedback, namely, in the prior art, whether the energy feedback is performed is judged only according to the battery charge state, and the energy feedback has singleness.
In the braking and charging process of the electric mine, when the vehicle speed reaches a certain speed and the charging voltage approaches to the limit of charging and charging, the air vehicle automatically starts mechanical braking, and a large amount of energy is lost in the mechanical braking process.
Disclosure of Invention
In order to solve the technical problems, the invention provides a low-consumption surface mine exploitation method of an electric vehicle and an electric vehicle electric energy feedback system.
The invention is realized by the following technical scheme.
The invention provides a low-consumption surface mine exploitation method of an electric vehicle and an electric vehicle electric energy feedback system, which adopt the following scheme:
1 dividing a steep slope terrain into a plurality of steps;
2, connecting the steps by using a ramp;
3, single-step operation, after blasting, adopting an excavator to recursively push the single-step operation layer by layer, and transporting the single-step operation along the road by an electric vehicle.
The comprehensive gradient of the ramp is 5-8 degrees. When the downhill gradient is greater than 8 degrees, the ribbon should be punched with the gentle slope section. When the vehicle descends a slope section, the charging system automatically controls the speed of the vehicle to accelerate to travel, the ascending slope mainly consumes electricity, and the vehicle is mainly charged when descending the slope. The comprehensive gradient ratio of the ramp is controlled to be 5-8 degrees, the length ratio of the ramp of the total road section which is a mud stone road to the horizontal road is required to be greater than 6:1, and the length ratio of the ramp of the total road section which is a mud stone cement road to the horizontal road is required to be greater than 4:1.
In the step 3, the working sequence of steps is from top to bottom, the excavator adopts three-dimensional parallel recursion, and the direction is the same direction of a slope. The horizontal running distance of the heavy-duty vehicle on the mining area platform is shortened.
A braking electric energy feedback system of an electric vehicle comprises a whole vehicle controller, a motor controller, a BMS and a power generation control unit.
The whole vehicle controller is respectively connected with the motor controller, the BMS and the power generation control unit and is used for receiving the running information of the vehicle or sending a control instruction of the vehicle;
the motor controller collects the running state of the vehicle and is connected with the motor to control the starting or stopping of the vehicle;
the BMS acquires the temperature of the battery pack and the highest single voltage of the battery, and receives or transmits a control instruction of the whole vehicle controller;
and the power generation control unit collects feedback electric quantity of the generator and receives or transmits a control instruction of the whole vehicle controller.
The motor controller is also connected with a rotating speed sensor, the rotating speed sensor is arranged on the wheel shaft, the rotating speed sensor collects the rotating speed of the wheel shaft and transmits the rotating speed to the motor controller, the motor controller converts the rotating speed into the vehicle speed and transmits the vehicle speed to the whole vehicle controller, and the vehicle braking system is used for controlling whether the vehicle needs to be decelerated and controlled or not.
The BMS is connected with the battery pack to control the battery pack to switch between a boost charging mode and a buck charging mode in parallel or in series.
The power generation control unit controls connection or disconnection between the power generation clutch and the wheel shaft according to the rotation speed of the wheels.
When the motor controller detects that the vehicle is on a downhill slope, the whole vehicle controller controls the power generation control unit to enter a charging mode.
The whole vehicle controller sends out a boosting charging mode to the power generation control unit when the feedback electric quantity of the generator is larger than the highest single voltage threshold value of the battery; and when the feedback electric quantity of the generator is smaller than the highest single voltage threshold value of the battery, the whole vehicle controller sends out a step-down charging mode to the power generation control unit.
The vehicle controller also judges whether the vehicle speed is greater than the charging speed after judging that the vehicle is in a downhill state, if the vehicle speed is greater than or equal to the charging speed, the vehicle enters a charging mode, and if the vehicle speed is less than the charging speed and the feedback electric quantity of the generator is greater than the highest single voltage threshold value of the battery, the vehicle is automatically converted into mechanical braking.
The charging is in an air vehicle braking mode or the speed is more than or equal to 30km/h.
The mine road is a heavy vehicle downhill slope, an empty vehicle uphill slope, and the shape of the surface mine moving from top to bottom is fully utilized.
The gradient of the mine ramp is within 5-8 degrees, when the gradient of the single-section steep slope is more than 8 degrees, the steepest gradient is less than 13 degrees, and the length of the single section is not more than 100m.
When the gradient of the single-section steep slope of the mine road is far more than 8 degrees, the slope toe should be adjusted by the ribbon flushing section.
The invention has the beneficial effects that: the energy of the storage battery is timely supplemented, the service life of the storage battery is greatly prolonged, and the driving range is increased. Meanwhile, a strong braking force can be generated during charging, so that the abrasion of a brake pad can be reduced, the vehicle speed is automatically reduced, and the vehicle is safer to drive.
The invention controls the gradient of the mine road, achieves complete pneumatic and electric charging, fully utilizes the potential energy difference between the ascending slope of the empty vehicle and the descending slope of the heavy vehicle to charge, supplements the energy conversion efficiency loss of the electric vehicle, and realizes the low-energy-consumption operation of the electric vehicle.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a vehicle charge control system of the present invention;
fig. 3 is a schematic diagram of the structure of the charging circuit of the present invention.
In the figure: 100-whole vehicle controller, 200-motor controller, 201-motor, 202-wheel shaft, 203-rotation speed sensor, 300-BMS, 301-battery pack, 400-power generation control unit, 401-power generation clutch, 402-generator, 500-mine step and first road longitudinal section, 501-mining step propulsion section, 502-ramp between up and down steps
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
The utility model provides an electric vehicle low consumption surface mine exploitation method and electric vehicle electric energy feedback system, adopts following scheme:
1) Dividing the abrupt slope terrain into a plurality of steps;
2) Connecting the steps by using a ramp;
3) And (3) single-step operation, after blasting, adopting an excavator to recursively push the single-step operation layer by layer, and transporting the single-step operation along a road by an electric vehicle.
The gradient of the ramp is 5-8 degrees.
The degree of the mine road is within 5-8 degrees, when the gradient of the single-section steep slope is more than 8 degrees, the steepest gradient is less than 13 degrees, and the length of the single section is not more than 100m.
When the gradient of a single-section steep slope of the mine road is more than 8 degrees, the slope toe should be adjusted by the ribbon flushing section.
In the step 3, the working sequence of steps is from top to bottom, the excavator adopts three-dimensional parallel recursion, and the direction is the same direction of a slope.
The utility model provides an electric vehicle braking electric energy feedback system, includes whole car controller 100, motor controller 200, BMS300, electricity generation control unit 400 its characterized in that:
the whole vehicle controller 100 is respectively connected with the motor controller 200, the BMS300 and the power generation control unit 400, and is used for receiving running information of a vehicle or sending a control instruction of the vehicle;
the motor controller 200 collects the running state of the vehicle and is connected with the motor 201 to control the starting or stopping of the vehicle;
the BMS300 collects the battery pack temperature and the highest cell voltage of the battery, and receives or transmits a control command of the vehicle controller 100;
the power generation control unit 400 collects feedback power of the generator, and receives or transmits a control command of the vehicle controller 100.
The motor controller 200 is further connected with a rotation speed sensor 203, the rotation speed sensor 203 is mounted on the wheel shaft 202, the rotation speed sensor 203 collects the rotation speed of the wheel shaft 202 and transmits the rotation speed to the motor controller 200, the motor controller 200 converts the rotation speed into a vehicle speed and transmits the vehicle speed to the whole vehicle controller 100, and whether the vehicle needs to be decelerated or not to control the vehicle speed state is controlled through a vehicle braking system.
The BMS300 is connected with the battery pack 301 to control the battery pack 301 to switch between a boost charging mode and a buck charging mode in parallel or in series.
The power generation control unit 400 controls connection or disconnection between the power generation clutch 401 and the wheel shaft 202 according to the wheel rotation speed.
When the motor controller 200 detects that the vehicle is descending a slope, the whole vehicle controller 100 controls the power generation control unit 400 to enter a charging mode.
The whole vehicle controller 100 sends out a boost charging mode to the power generation control unit 400 when the feedback electric quantity of the generator is larger than the highest single voltage threshold value of the battery; the vehicle controller 100 sends out a step-down charging mode to the power generation control unit 400 when the feedback electric quantity of the generator is smaller than the highest single voltage threshold of the battery.
The vehicle controller 100 further determines whether the vehicle speed is greater than the charging speed after determining that the vehicle is in a downhill state, if the vehicle speed is greater than or equal to the charging speed, the vehicle enters a charging mode, and if the vehicle speed is less than the charging speed and the feedback electric quantity of the generator is greater than the highest single voltage threshold of the battery, the vehicle is automatically converted into mechanical braking.
The charging speed is when the braking system is started or the vehicle speed exceeds 30km/h.
The power generation system is characterized in that the power generator is connected to the wheel rotating shaft, the clutch is arranged, when the electric vehicle is in running, the vehicle is decelerated, descends and needs to brake, the clutch arranged on the wheel rotating shaft is used for combining driving wheels connected with the power generator, the power generator is driven by inertia of the vehicle to generate power, and the power generator system has certain braking capability on the rotating shaft while generating power, so that the speed of the vehicle is reduced during descending.
As shown in fig. 2, the speed measurement comparison circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a potentiometer RP1, a potentiometer RP2, a diode D1, a diode D2, a triode BG1, a triode BG2, an integrated circuit IC1, a relay J1, a speed measurement sensor R and a switch S1; the resistor R1 is connected between the positive electrode of the battery E1 and the collector electrode of the triode BG1, the resistor R2 is connected between the emitter electrode of the triode BG1 and the ground, the resistor R3 is connected between the collector electrode of the triode BG1 and the ground, the resistor R4 is connected between the base electrode of the triode BG2 and the negative electrode of the diode D1, the resistor R6 is connected between the emitter electrode of the triode BG2 and the ground, the potentiometer RP1 is connected between the positive electrode of the battery E1 and the base electrode of the triode BG1, the potentiometer RP2 is connected between the positive electrode of the battery E1 and the 2 pin of the integrated circuit IC1, the positive electrode of the diode D1 is connected between the base electrode of the integrated circuit IC1, the negative electrode is connected with the resistor R5, the base electrode of the speed measuring sensor R1 is connected between the base electrode of the triode IC1 and the ground, the collector electrode is connected with the 3 pin of the integrated circuit IC1, the base electrode of the resistor BG2 is connected between the resistor R5, the base electrode of the triode BG2 is connected between the positive electrode of the resistor R1 and the collector electrode of the diode D1, the positive electrode of the resistor R1 is connected with the collector electrode of the diode D1, and the positive electrode of the resistor R1 is connected between the positive electrode of the resistor R1 and the diode G1 is connected with the positive electrode of the diode 1, and the positive electrode of the resistor D1 is connected with the resistor S1 is connected between the positive electrode of the resistor S1 and the positive electrode of the resistor S1 is connected with the resistor S1.
The BMS controls the battery pack 301 to switch the boost charging mode and the buck charging mode in parallel or in series with the battery pack connection.
The power generation control unit 400 controls connection or disconnection between the power generation clutch 401 and the wheel shaft 202 according to the wheel rotation speed.
When the motor controller 200 detects that the vehicle is descending a slope, the whole vehicle controller 100 controls the power generation control unit 400 to enter a charging mode. When the speed per hour of the downhill electric vehicle exceeds 30km/h, a 1 foot of an integrated circuit IC1 outputs a high level, a triode BG2 is conducted, a relay J1 is attracted, a normally open contact J1-1 is closed, a normally closed contact J1-2 is opened, a boosting charging circuit stops working, storage batteries E1, E2 and E3 are changed from serial connection into parallel connection, HD is a lantern light bulb, the cold resistance of the storage batteries is 0.2 omega, the charging circuit is basically not influenced when the storage batteries do not work, when the vehicle speed increases, the charging voltage also rises, the HD is lightened, the thermal resistance of the storage batteries increases rapidly, and the voltage at two ends also increases, so that the charging current is limited, the charging current of each storage battery is not overrun, and the whole circuit is protected to work safely.
The boost charging circuit comprises a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a diode D4, a triode BG3, a triode BG4, a rectifying pile UR, a transformer B, normally closed contacts J1-2 of a relay J1 and a fuse FU.
The resistor R7 is connected between the 2 pin of the input coil B1-1 of the transformer B and the 2 pin of the input coil B1-2 of the transformer B, the resistor R8 is connected between the 3 pin and the 4 pin of the rectifier stack UR, the positive electrode of the capacitor C1 is connected with the 2 pin of the input coil B1-1 of the transformer B, the negative electrode is grounded, the capacitor C2 is connected between the 1 pin and the 3 pin of the input coil B1-1 of the transformer B, the positive electrode of the capacitor C3 is connected with the 3 pin of the rectifier stack UR, the negative electrode is connected with the 4 pin of the rectifier stack UR, the positive electrode of the diode D3 is connected with the 2 pin of the input coil B1-1 of the transformer B, the positive electrode of the diode D4 is connected with the 3 pin of the rectifier stack UR through the fuse FU, the negative electrode is connected with the positive electrode of the battery E1, and the normally-closed contact J1-2 of the relay J1 is connected between the normally-open contact J1-1 of the relay J1 and the 2 pin of the input coil B1-1 of the transformer B.
As shown in fig. 2, the step-down charging circuit includes a battery E1, a battery E2, a battery E3, a diode D5, a dc motor M, a normally open contact J1-1 of a relay J1, a normally closed contact J1-2, a bulb HD, and a switch S2.
The battery E1, the battery E2 and the battery E3 are connected in series through a normally-closed contact J1-2 of the relay J1, the normally-open contact J1-1 of the relay J1 is connected in parallel, the diode D5 is connected between the fixed end of the switch S2 and the ground in parallel, the 1 of the switch S2 is connected with the positive electrode of the battery E1, the 2 is connected with the common point of the normally-open contact J1-1 and the normally-closed contact J1-2 of the relay J1, and the bulb HD is connected between the normally-open contact J1-1 of the relay J1 and the positive electrode of the battery E1.
The whole vehicle controller 100 sends out a boost charging mode to the power generation control unit 400 when the feedback electric quantity of the generator is larger than the highest single voltage threshold value of the battery; the vehicle controller 100 sends out a step-down charging mode to the power generation control unit 400 when the feedback electric quantity of the generator is smaller than the highest single voltage threshold of the battery.
The vehicle controller 100 further determines whether the motor controller 200 controls the vehicle to be in a braking state before controlling the power generation control unit 400 to enter a charging mode, and enters the charging mode if the vehicle is in a non-braking state.
The vehicle controller 100 further determines whether the vehicle speed is greater than the charging speed after determining the vehicle braking state, if the vehicle speed is greater than or equal to the charging speed, the vehicle enters the charging mode, and if the vehicle speed is less than the charging speed and the feedback electric quantity of the generator is greater than the highest single voltage threshold of the battery, a fault signal is sent.
The vehicle controller 100 further detects whether the vehicle is in a braking state after determining the vehicle speed, enters a charging state if the vehicle is in a braking mode, and sends out a fault signal if the vehicle is in a non-braking state.
As shown in fig. 1, the area of the coming platform is too large and the energy consumption is too large in the mining area of the mine, so that the dynamic balance in the charging process of the electric car cannot be met, and therefore, the road and the platform in the mine 500 are controlled to be recursively and gradually, and the energy balance in the electric car is realized by controlling the position of the step 501 and the gradient of the ramp 502.
Claims (1)
1. The electric vehicle low-consumption surface mine exploitation method adopts the following scheme:
1) Dividing the abrupt slope terrain into a plurality of steps;
2) Connecting the steps by using a ramp;
3) Single-step operation, after blasting, adopting an excavator to recursively push the single-step operation layer by layer, and transporting the single-step operation along a road by an electric vehicle;
the comprehensive gradient ratio of the ramp is controlled to be 5-8 degrees, the length ratio of the ramp of the total road section which is a mud stone road to the horizontal road is required to be greater than 6:1, and the length ratio of the ramp of the total road section which is a mud stone cement road to the horizontal road is required to be greater than 4:1;
the step operation sequence in the step 3) is from top to bottom, the excavator adopts three-dimensional parallel recursion, and the direction is the same direction of the slope;
the braking electric energy feedback system of the electric vehicle comprises a whole vehicle controller (100), a motor controller (200), a BMS (300) and a power generation control unit (400), and is characterized in that:
the whole vehicle controller (100) is respectively connected with the motor controller (200), the BMS (300) and the power generation control unit (400) and is used for receiving running information of a vehicle or sending a control instruction of the vehicle;
the motor controller (200) collects the running state of the vehicle and is connected with the motor (201) to control the starting or stopping of the vehicle;
the BMS (300) collects the temperature of the battery pack and the highest single voltage of the battery, and receives or transmits a control instruction of the whole vehicle controller (100);
the power generation control unit (400) collects feedback electric quantity of the generator and receives or transmits a control instruction of the whole vehicle controller (100);
the motor controller (200) is also connected with a rotating speed sensor (203), the rotating speed sensor (203) is arranged on the wheel shaft (202), the rotating speed sensor (203) collects the rotating speed of the wheel shaft (202) and transmits the rotating speed to the motor controller (200), the motor controller (200) converts the rotating speed into a vehicle speed and transmits the vehicle speed to the whole vehicle controller (100), and the vehicle braking system is used for controlling whether the vehicle needs to be in a speed reduction control state or not;
the BMS (300) is connected with the battery pack (301) to control the battery pack (301) to switch between a boost charging mode and a buck charging mode in parallel or in series;
the power generation control unit (400) controls connection or disconnection between the power generation clutch (401) and the wheel shaft (202) according to the rotation speed of the wheels;
the whole vehicle controller (100) also judges whether the vehicle speed is greater than the charging speed after judging that the vehicle is in a downhill state, enters a charging mode if the vehicle speed is greater than or equal to the charging speed, and automatically turns into mechanical braking if the vehicle speed is less than the charging speed and the feedback electric quantity of the generator is greater than the highest single voltage threshold of the battery;
when the motor controller (200) detects that the vehicle is on a downhill slope, the whole vehicle controller (100) controls the power generation control unit (400) to enter a charging mode;
the whole vehicle controller (100) sends out a boosting charging mode to the power generation control unit (400) when the feedback electric quantity of the generator is larger than the highest single voltage threshold of the battery; the whole vehicle controller (100) sends out a step-down charging mode to the power generation control unit (400) when the feedback electric quantity of the generator is smaller than the highest single voltage threshold of the battery;
the charging speed is when the braking system is started or the vehicle speed is more than or equal to 30 km/h;
the mine road is a heavy vehicle downhill slope, an empty vehicle uphill slope, and the shape of the surface mine moving from top to bottom is fully utilized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297094.5A CN112412466B (en) | 2020-11-18 | 2020-11-18 | Electric vehicle low-consumption surface mine exploitation method and electric vehicle electric energy feedback system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297094.5A CN112412466B (en) | 2020-11-18 | 2020-11-18 | Electric vehicle low-consumption surface mine exploitation method and electric vehicle electric energy feedback system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112412466A CN112412466A (en) | 2021-02-26 |
| CN112412466B true CN112412466B (en) | 2023-06-27 |
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