Range-extended pure electric system

Abstract

The utility model discloses a range-extended pure electric system, which is applied to agricultural equipment and comprises a pure electric driving system, a methanol range-extended system and a control system. The pure electric driving system at least comprises a motor unit and a power battery unit, and the power battery unit is used for supplying power to the motor unit; the methanol range extending system at least comprises a methanol engine unit and a generator unit, and the methanol engine unit is used for driving the generator unit to generate electricity so as to charge the power battery unit or supply power to the motor unit; the control system at least comprises a high-voltage main and auxiliary drive controller and an MCU, the high-voltage main and auxiliary drive controller is connected with the power battery unit, the generator unit and the MCU, and the MCU is connected with the motor unit. When the agricultural machine is in a pure electric mode, the power battery unit supplies power to the motor unit, the advantages of environmental protection and high efficiency of a pure electric agricultural machine are achieved, the endurance mileage problem can be solved through the methanol range extending system, and the requirement for large-area farmland operation is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field especially relates to a range -extended type pure electric system. BACKGROUND

[0002] With the development of agricultural modernization, the performance requirement of agricultural machinery is continuously improved. The traditional fuel oil agricultural machinery has problems such as great environmental pollution, high energy consumption, great noise etc. Although the pure electric agricultural machinery is environmental protection and powerful, but the endurance mileage is limited, which limits its application in large area farmland operation, and although the gasoline range -extension can solve the endurance problem, but still can produce more emission pollution.

[0003] Therefore, it is urgent to provide a range -extended type pure electric system suitable for agricultural equipment, which has the environmental protection and high -efficient advantages of pure electric agricultural machinery, and can solve the endurance mileage problem through methanol range -extension system, to meet the demand of large area farmland operation. UTILITY MODEL CONTENT

[0004] The utility model discloses a range -extended type pure electric system suitable for agricultural equipment, which has the environmental protection and high -efficient advantages of pure electric agricultural machinery, and can solve the endurance mileage problem through methanol range -extension system, to meet the demand of large area farmland operation.

[0005] The utility model discloses a range -extended type pure electric system suitable for agricultural equipment, which has the environmental protection and high -efficient advantages of pure electric agricultural machinery, and can solve the endurance mileage problem through methanol range -extension system, to meet the demand of large area farmland operation.

[0006] A range -extended type pure electric system is applied to agricultural equipment, and includes:

[0007] A pure electric drive system includes at least a motor unit and a power battery unit, and the power battery unit is used to supply power for the operation of the motor unit.

[0008] A methanol range -extension system includes at least a methanol engine unit and a generator unit, and the methanol engine unit is used to drive the generator unit to generate electricity, so as to charge the power battery unit or supply power for the motor unit.

[0009] A control system includes at least a high -voltage main auxiliary drive controller and an MCU, the high -voltage main auxiliary drive controller is connected with the power battery unit, the generator unit and the MCU respectively, and the MCU is connected with the motor unit.

[0010] When the agricultural equipment is in pure electric mode, the power battery unit supplies power for the operation of the motor unit, and when the agricultural equipment is in methanol range -extension mode, the generator unit directly supplies power for the operation of the motor unit or charges the power battery unit.

[0011] Preferably, the methanol range extending system comprises at least one methanol tank connected to the methanol engine unit for supplying methanol for continuous operation of the methanol engine unit.

[0012] Preferably, the methanol range extending system further comprises at least one gasoline tank connected to the methanol engine unit for igniting when the methanol engine unit starts.

[0013] Preferably, the control system comprises a range extender control unit having an engine controller and a generator controller; the high-voltage main auxiliary drive controller is connected to the generator unit through the generator controller;

[0014] the range extender control unit is connected to the methanol engine unit through the engine controller to control operation of the methanol engine unit;

[0015] the range extender control unit is connected to the generator unit through the generator controller to control operation of the generator unit.

[0016] Preferably, the control system further comprises a vehicle control unit connected to the engine controller and the generator controller, respectively, to control operation of the agricultural equipment.

[0017] Preferably, the range extender pure electric system comprises a battery unit comprising a battery module, a first converter module and a second converter module;

[0018] the battery module has a charging end and a discharging end, the high-voltage main auxiliary drive controller is connected to the charging end of the battery module through the first converter module, and the high-voltage main auxiliary drive controller unit is connected to the discharging end of the battery module through the second converter module.

[0019] Preferably, the first converter module and / or the second converter module is a DCDC converter.

[0020] Preferably, the range extender pure electric system further comprises at least one fast charging interface connected to the power battery unit for charging the power battery unit.

[0021] Preferably, the range extender pure electric system further comprises:

[0022] a heating unit connected to the power battery unit through the high-voltage main auxiliary drive controller;

[0023] and / or,

[0024] a refrigeration unit connected to the power battery unit through the high-voltage main auxiliary drive controller.

[0025] Preferably, the heating unit is a PTC heater, and / or the refrigeration unit is an air conditioner compressor.

[0026] Compared with the prior art, the utility model has at least the following beneficial effects:

[0027] The range-extending pure electric system is suitable for agricultural equipment, and by combining pure electric driving and methanol range-extending technology, pollutants generated by methanol combustion are less than those generated by traditional fuel, carbon dioxide emission is lower than that of a traditional fuel engine, the methanol range-extending system can charge a battery pack or directly supply power, solves the problem of energy supply of existing agricultural equipment during long-term operation, greatly prolongs the endurance mileage of the agricultural equipment, especially in the case of long-time and high-load operation, ensures the continuous power output of the equipment, the system not only has a pure electric driving mode, but also can provide additional power support through the methanol range-extending system, realizes longer operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of the range-extending pure electric system provided by the utility model embodiment.

[0029] In the figure: 1, motor unit; 2, power battery unit; 3, methanol engine unit; 4, generator unit; 5, high-voltage main auxiliary drive controller; 6, MCU; 7, methanol tank; 8, gasoline tank; 9, range extender control unit; 10, engine controller; 11, generator controller; 12, whole vehicle control unit; 13, battery module; 14, first converter module; 15, second converter module; 16, fast charging interface; 17, PTC heater; 18, air conditioner compressor. DETAILED DESCRIPTION

[0030] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will not be repeated.

[0031] The words expressing position and direction described in the utility model are all explained by taking the drawings as examples, but changes can also be made according to needs, and the changes made are all included in the protection scope of the utility model.

[0032] Referring Figure 1 The utility model provides a range-extending pure electric system applied to agricultural equipment, comprising a pure electric driving system, a methanol range-extending system and a control system.

[0033] Specifically, the range-extending pure electric system provided by the utility model has a core of a pure electric drive system.

[0034] The pure electric drive system at least includes a motor unit 1 and a power battery unit 2, and the power battery unit 2 is used for supplying power for the operation of the motor unit 1. Specifically, the motor unit 1 can be a high-efficiency motor with high power density, so that the motor unit 1 can meet the power demand of the agricultural equipment in different working scenarios. In addition, the agricultural equipment has a transmission system and a drive shaft provided with wheels, and the high-efficiency motor is connected with the drive shaft of the agricultural equipment through the transmission system to realize the driving of the equipment. The power battery unit 2 adopts a high-energy-density power battery, such as a lithium battery pack, and the power battery unit 2 provides power energy to drive the motor unit 1 to work, so as to meet the power demand of the agricultural equipment in the pure electric mode. In addition, the power battery unit 2 can also be charged through an external fast-charging interface 16, and can also be charged through the generator unit 4 in the methanol range-extending system.

[0035] It should be noted that the power battery unit 2 is a BMS (Battery Management System) power battery, and the BMS is an intelligent system for managing and protecting the power battery, which ensures the safety, efficiency and service life of the battery during use. In actual application, the power battery is usually composed of multiple battery monomers, and the functions of the BMS include but are not limited to: (1) the battery monomers can be intelligently managed to ensure the safety and stability of the battery pack during charging and discharging, and to avoid the influence of the performance of the entire battery pack caused by the problem of a single battery; (2) by monitoring the health status and charging status of the power battery in real time, the use process of the power battery is optimized, and the damage to the battery caused by excessive charging and discharging is reduced, so as to prolong the service life of the battery; (3) measures such as cutting off the circuit and starting the cooling system can be taken in time to avoid problems such as battery overheating, open circuit and overcharging, prevent the power battery from being dangerous under extreme conditions such as high load and high temperature, and protect the safety of users.

[0036] In order to prolong the working time of the agricultural equipment, especially when the power battery unit 2 is insufficient, the range-extending pure electric system will automatically switch to the methanol range-extending mode, and the methanol range-extending system will provide additional power support.

[0037] The methanol range extending system at least comprises a methanol engine unit 3 and a generator unit 4, the methanol engine unit 3 is used to drive the generator unit 4 to generate electricity for charging the power battery unit 2 or supplying power to the motor unit 1. Specifically, the methanol engine unit 3 adopts a high-efficiency methanol engine, which can generate mechanical energy by burning methanol, and the methanol engine drives the generator unit 4 to generate electricity, the generator unit 4 is driven by the methanol engine, which is responsible for charging the power battery unit 2 or directly providing power to the motor unit 1, so that the agricultural equipment can run continuously whether in charging mode or direct power supply mode.

[0038] In addition, the methanol range extending system can also include at least one methanol tank 7 and a gasoline tank 8, wherein the methanol tank 7 is connected with the methanol engine unit 3 for supplying methanol for the continuous operation of the methanol engine unit 3, and the gasoline tank 8 is connected with the methanol engine unit 3 for ignition when the methanol engine unit 3 starts. Specifically, the methanol tank 7 is used to store methanol and provide fuel for the methanol engine unit 3 to ensure long-time operation of the engine, and the gasoline tank 8 is used to provide starting fuel for the methanol engine unit 3, which ignites the fuel when the methanol engine starts. Since gasoline is easier to ignite than methanol when the engine starts, it can improve the stability of the operation of the methanol engine and ensure smooth start and working condition of the engine.

[0039] It should be noted that since the methanol engine unit 3 only consumes gasoline when starting, in actual application, the gasoline tank 8 can be set in a smaller number or smaller volume than the methanol tank 7.

[0040] In order to optimize the switching between the pure electric drive system and the methanol range extending system, intelligent management and control is needed with the help of a control system. The control system ensures that the scheduling of power and the operation of the equipment can be carried out efficiently and smoothly in the pure electric mode and the methanol range extending mode.

[0041] The control system at least comprises a high-voltage main auxiliary drive controller 5 and an MCU (micro control unit) 6, the high-voltage main auxiliary drive controller 5 is connected with the power battery unit 2, the generator unit 4 and the MCU 6 respectively, and the MCU 6 is connected with the motor unit 1; when the agricultural equipment is in the pure electric mode, the power battery unit 2 supplies power for the operation of the motor unit 1; when the agricultural equipment is in the methanol range extending mode, the generator unit 4 directly supplies power for the operation of the motor unit 1 or charges the power battery unit 2. Specifically, the high-voltage main auxiliary drive controller 5 is responsible for the scheduling of high-voltage current, ensuring the conversion and distribution of current from the power battery unit 2 or the generator unit 4 to the motor unit 1 or the battery module 13, and the high-voltage main auxiliary drive controller 5 is connected with the power battery unit 2, the generator unit 4 and the MCU 6 to ensure safe operation of the system.

[0042] It should be noted that the MCU, i.e. micro control unit, is mainly used for real-time monitoring of the running state of the motor unit 1 in the extended range electric system, and adjusting the output power of the motor according to the demand, to ensure the stable operation of the agricultural equipment under different loads.

[0043] In addition, the control system includes an extended range control unit 9, which has an engine controller 10 and a generator controller 11; the high-voltage main auxiliary drive controller 5 connects the generator unit 4 through the generator controller 11; wherein the extended range control unit 9 connects the methanol engine unit 3 through the engine controller 10 to control the operation of the methanol engine unit 3, such as controlling the start and stop of the engine; the extended range control unit 9 connects the generator unit 4 through the generator controller 11 to control the operation of the generator unit 4, such as controlling the operation of the generator.

[0044] Further, the control system further includes a vehicle control unit 12, which is connected to the engine controller 10 and the generator controller 11 respectively to control the operation of the agricultural equipment. Specifically, the vehicle control unit 12 is the central part of the whole system, responsible for adjusting the working state of the whole extended range electric system according to the actual demand, and after cooperating with the engine controller 10 and the generator controller 11, it can ensure the smooth switching of the agricultural equipment between the pure electric mode and the methanol extended range mode, and ensure the continuous operation of the agricultural equipment.

[0045] Therefore, the extended range electric system is suitable for agricultural equipment, which combines pure electric drive and methanol extended range technology, and the pollutants generated by methanol combustion are less than traditional fuel, and the carbon dioxide emission is lower than traditional fuel engine, the methanol extended range system can charge the battery pack or directly supply power, solving the energy supply problem of existing agricultural equipment during long-term operation, greatly extending the endurance mileage of the agricultural equipment, especially in the case of long-time and high-load operation, to ensure the continuous power output of the equipment. The system not only has a pure electric drive mode, but also can provide additional power support through the methanol extended range system to realize longer operation.

[0046] In some optional embodiments, the extended-range all-electric system includes a battery unit, which includes a battery module 13, a first converter module 14, and a second converter module 15. Specifically, the battery module 13 can have a charge and discharge function, the battery module 13 has a charging end and a discharging end, the high-voltage main auxiliary drive controller 5 connects the charging end of the battery module 13 through the first converter module 14, and the high-voltage main auxiliary drive controller unit 5 connects the discharging end of the battery module 13 through the second converter module 15. In actual applications, the first converter module 14 and / or the second converter module 15 can be selected as a DCDC converter. The battery module 13 can be a 24V battery, the first converter module 14 is used to convert the high voltage of the power battery unit 2 into a 24V low voltage suitable for the battery module 13 to charge the battery module 13, and the second converter module 15 is used to convert the 24V low voltage of the battery module 13 into a 12V low voltage to enable the battery module 13 to power the electrical components on the agricultural equipment.

[0047] In some optional embodiments, in order to improve the convenience of charging the power battery unit 2, the extended-range all-electric system further includes at least one fast charging interface 16 connected with the power battery unit 2 for charging the power battery unit 2. Thus, through the fast charging interface 16, the user can quickly charge the power battery unit 2, reduce downtime, and improve the overall work efficiency of the agricultural equipment.

[0048] In some optional embodiments, in order to ensure that the power battery unit 2 can work stably under different climate conditions, the extended-range all-electric system further includes a heating unit and a refrigeration unit. The heating unit is connected to the power battery unit 2 through the high-voltage main auxiliary drive controller 5, and / or the refrigeration unit is connected to the power battery unit 2 through the high-voltage main auxiliary drive controller 5. Specifically, in actual applications, the heating unit is a PTC heater 17, and / or the refrigeration unit is an air conditioner compressor 18. Thus, when the ambient temperature is low, the PTC heater 17 heats the power battery unit 2 through the high-voltage main auxiliary drive controller 5 to ensure that the battery can maintain good performance under low temperature conditions. When the ambient temperature is high, the air conditioner compressor 18 removes excess heat from the power battery through the high-voltage main auxiliary drive controller 5 to avoid overheating of the battery, thereby prolonging the service life and stability of the battery.

[0049] Therefore, the range-extending pure electric system is applied to the agricultural equipment, the seamless switching of the pure electric driving and the methanol range-extending system can meet the demand of long-time and high-power agricultural operation, the control system realizes the switching of the pure electric mode and the methanol range-extending mode through intelligent scheduling, ensures the efficient operation of the equipment under different working conditions, in addition, the range-extending pure electric system improves the endurance, charging efficiency and environmental adaptability of the equipment through the design of the battery module 13, the fast charging interface 16, the heating / cooling unit and the like, thereby improving the operation efficiency and reducing the environmental impact.

[0050] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model, all these changes should belong to the protection scope of the utility model claim.

Claims

1. A range-extending pure electric system applied to agricultural equipment, characterized in that, Comprise: A pure electric drive system, comprising at least a motor unit (1) and a power battery unit (2) for powering the operation of the motor unit (1); A methanol range extending system, comprising at least a methanol engine unit (3) for driving the generator unit (4) to generate electricity for charging the power battery unit (2) or powering the motor unit (1), and a generator unit (4); A control system, comprising at least a high-voltage main auxiliary drive controller (5) connected to the power battery unit (2), the generator unit (4) and an MCU (6), and the MCU (6) connected to the motor unit (1); When the agricultural equipment is in pure electric mode, the power battery unit (2) powers the operation of the motor unit (1); when the agricultural equipment is in methanol range extending mode, the generator unit (4) directly powers the operation of the motor unit (1) or charges the power battery unit (2).

2. The extended-range electric system of claim 1, wherein, The methanol range extending system comprises at least one methanol tank (7) connected to the methanol engine unit (3) for supplying methanol for continuous operation of the methanol engine unit (3).

3. The range extended pure electric system of claim 2, wherein, The methanol range extending system further comprises at least one gasoline tank (8) connected to the methanol engine unit (3) for ignition when the methanol engine unit (3) starts.

4. The range extended pure electric system of claim 1, wherein, The control system comprises a range extender control unit (9) having an engine controller (10) and a generator controller (11); the high-voltage main auxiliary drive controller (5) is connected to the generator unit (4) through the generator controller (11); The range extender control unit (9) is connected to the methanol engine unit (3) through the engine controller (10) to control the operation of the methanol engine unit (3); The range extender control unit (9) is connected to the generator unit (4) through the generator controller (11) to control the operation of the generator unit (4).

5. The range extended pure electric system of claim 4, wherein, The control system further comprises a vehicle control unit (12) connected to the engine controller (10) and the generator controller (11) to control the operation of the agricultural equipment.

6. The range extended electric system of claim 1, wherein, The range extending pure electric system comprises a battery unit, which comprises a battery module (13), a first converter module (14) and a second converter module (15); The battery module (13) has a charging end and a discharging end, the high-voltage main auxiliary drive controller (5) is connected to the charging end of the battery module (13) through the first converter module (14), and the high-voltage main auxiliary drive controller (5) is connected to the discharging end of the battery module (13) through the second converter module (15).

7. The range extended pure electric system according to claim 6, characterized in that, The first converter module (14) and / or the second converter module (15) is a DCDC converter.

8. The range extended electric system of claim 1, wherein, The range-extending pure electric system further comprises at least one fast charging interface (16) connected with the power battery unit (2) for charging the power battery unit (2).

9. The range extended electric system of claim 1, wherein, The range-extending pure electric system further comprises: a heating unit connected with the power battery unit (2) through the high-voltage main auxiliary drive controller (5); and / or, a refrigeration unit connected with the power battery unit (2) through the high-voltage main auxiliary drive controller (5).

10. The range extended pure electric system of claim 9, wherein, The heating unit is a PTC heater (17), and / or the refrigeration unit is an air conditioner compressor (18).

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