Methanol range-extending type automobile crane power system and control method

Abstract

The invention discloses a methanol range-extending type automobile crane power system and a control method, and the methanol range-extending type automobile crane power system comprises an energy storage device, a methanol range extender, a range extender controller, an upper motor, an upper motor controller, a main driving motor, a main driving motor controller and a whole automobile controller, the methanol range extender is connected with the energy storage device, the range extender controller is connected with the range extender, the upper motor is connected with the energy storage device, the upper motor controller is arranged between the energy storage device and the upper motor, the main driving motor is connected with the energy storage device, and the main driving motor controller is arranged between the main driving motor and the energy storage device. The vehicle control unit is connected with the energy storage device, the range extender controller, the upper motor controller and the main driving motor controller, the methanol engine is adopted as a power source, carbon emission is effectively reduced, environmental pollution is avoided, the cruising ability is effectively improved, and meanwhile the safety of a battery is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile cranes, and in particular relates to a methanol range-extended automobile crane power system and a control method. Background Art

[0002] At present, construction machinery is following the development direction of "energy conservation and emission reduction" in the automobile industry. It is an inevitable development result that the construction machinery industry vigorously develops and applies low-carbon, environmentally friendly green energy and reduces the consumption and dependence on traditional energy such as fuel.

[0003] In the existing technology, new energy vehicle cranes in the industry are mainly concentrated in two directions: pure electric power and hybrid power. The popular hybrid models on the market are mainly oil-electric hybrids. Although oil-electric hybrids overcome the shortcomings of pure electric models such as short cruising range and inconvenient charging, their economic performance is still not guaranteed due to the addition of a diesel internal combustion engine, and the carbon emissions generated by post-processing also seriously affect their environmental friendliness. Summary of the invention

[0004] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a methanol range-extended truck crane power system and a control method.

[0005] The methanol range-extended truck crane power system of the present invention comprises:

[0006] An energy storage device, the energy storage device is used to store and release electrical energy;

[0007] A methanol range extender, the methanol range extender is connected to the energy storage device and is used to provide electrical energy to the energy storage device;

[0008] A range extender controller, the range extender controller is connected to the range extender and is used to monitor the methanol range extender and control the start and stop, speed setting and power generation of the methanol range extender;

[0009] An upper-mounted motor, which is connected to the energy storage device and is used to provide power for upper-mounted operations and the hydraulic system of the outriggers;

[0010] A top motor controller, which is disposed between the energy storage device and the top motor and is used to control the start and stop of the top motor;

[0011] A main drive motor, which is connected to the energy storage device and is used to provide driving force for the truck crane;

[0012] A main drive motor controller, which is arranged between the main drive motor and the energy storage device and is used to control the start and stop of the main drive motor;

[0013] A vehicle controller, the vehicle controller is respectively connected to the energy storage device, the range extender controller, the upper motor controller and the main drive motor controller, and is used to collect status information of the energy storage device, the methanol range extender, the upper motor and the main drive motor, and send control commands to the range extender controller, the upper motor controller and the main drive motor controller.

[0014] Furthermore, in the above-mentioned methanol-range extended-type truck crane power system, the methanol range extender includes a methanol engine, a FISG motor, a FISG motor controller and a gasoline pump, the methanol engine and the FISG motor are integrated and connected through a flywheel, the gasoline pump output end is connected to the methanol engine, and the FISG motor is connected to the energy storage device through the FISG motor controller.

[0015] Furthermore, in the above-mentioned methanol-range extended-range truck crane power system, the energy storage device includes a power battery and a high-voltage control box, the high-voltage control box is arranged on the power battery, and the high-voltage control box is used to monitor and control the input and output of the power battery.

[0016] Furthermore, in the above-mentioned methanol extended-range truck crane power system, the control end of the high-voltage control box is connected to the vehicle controller, the input end of the high-voltage control box is connected to the FISG motor controller, and the output end of the high-voltage control box is respectively connected to the upper motor controller and the main drive motor controller.

[0017] The methanol range-extended truck crane power system control method of the present invention comprises:

[0018] When the vehicle controller collects the methanol range extender status information through the range extender controller, the vehicle controller sends a constant speed control command to the range extender controller to control the methanol range extender to run at a constant speed;

[0019] When the vehicle controller collects the status information of the energy storage device, when the power of the energy storage device is less than or equal to 45%, the vehicle controller sends a control command to the range extender controller to control the operation of the methanol range extender to charge the energy storage device;

[0020] On the contrary, when the power of the energy storage device is greater than or equal to 70%, the vehicle controller sends a control command to the range extender controller to control the methanol range extender to shut down;

[0021] When the vehicle controller collects the energy storage device status information that the energy storage device is in DC charging or AC charging when stopped, the vehicle controller sends a control command to the range extender controller to control the methanol range extender to prohibit operation;

[0022] When the vehicle controller sends a power-on command to the energy storage device, the high-voltage control box detects communication interruption during the power-on process, and the high-voltage control box disconnects the relays in sequence according to the power-off process;

[0023] When communication interruption occurs during operation after power-on, all relay states remain unchanged;

[0024] When the range extender controller receives the closing command from the vehicle controller, the range extender controller closes the methanol range extender pre-charging relay, delays 0.5S, and then closes the methanol range extender main relay;

[0025] After receiving the disconnection command, the range extender controller disconnects the methanol range extender main relay, delays 0.5S, and then disconnects the methanol range extender pre-charge relay.

[0026] The methanol range-extended truck crane power system and control method of the present invention have the following advantages and beneficial effects:

[0027] The present invention adopts a methanol engine as a power source, which effectively reduces carbon emissions and avoids environmental pollution. By connecting a vehicle controller, a range extender controller and an energy storage device, the endurance is effectively improved while improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 It is a structural topological diagram of the power system of the methanol range-extended truck crane of the present invention;

[0030] Figure 2 It is a schematic diagram of the range extender structure of the methanol range-extended truck crane power system of the present invention;

[0031] Figure 3 The circuit topology diagram of the methanol range-extended truck crane power system of the present invention.

[0032] Description of reference numerals:

[0033] 1: Energy storage device, 11: Power battery, 12: High voltage control box;

[0034] 2: methanol range extender, 21: methanol engine, 22: FISG motor, 23: FISG motor controller, 24: gasoline pump;

[0035] 3: Range extender controller; 4: Upper motor; 5: Upper motor controller; 6: Main drive motor; 7: Main drive motor controller; 8: Vehicle controller. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] like Figure 1 to Figure 2 As shown, the methanol range-extended truck crane power system of the present invention comprises:

[0038] Energy storage device 1, energy storage device 1 is used to store and release electrical energy;

[0039] A methanol range extender 2, which is connected to the energy storage device 1 and is used to provide electrical energy to the energy storage device 1;

[0040] The range extender controller 3 is connected to the range extender and is used to monitor the methanol range extender 2 and control the start and stop, speed setting and power generation of the methanol range extender 2;

[0041] The upper motor 4 is connected to the energy storage device 1 and is used to provide power for the upper operation and the hydraulic system of the outriggers;

[0042] The upper motor controller 5 is arranged between the energy storage device 1 and the upper motor 4, and is used to control the start and stop of the upper motor 4;

[0043] A main drive motor 6, which is connected to the energy storage device 1 and is used to provide driving force for the truck crane;

[0044] A main drive motor controller 7, which is arranged between the main drive motor 6 and the energy storage device 1, and is used to control the start and stop of the main drive motor 6;

[0045] The vehicle controller 8 is connected to the energy storage device 1, the range extender controller 3, the upper motor controller 5 and the main drive motor controller 7 respectively, and is used to collect status information of the energy storage device 1, the methanol range extender 2, the upper motor 4 and the main drive motor 6, and send control commands to the range extender controller 3, the upper motor controller 5 and the main drive motor controller 7.

[0046] Specifically, when the power of the energy storage device 1 is low or the charging amount reaches the requirement, the vehicle controller 8 collects relevant information and sends a control instruction to the range extender controller 3. The range extender controller 3 controls the start, speed setting, power generation or shutdown of the methanol range extender 2 by receiving the instruction from the vehicle controller 8 and combining the feedback information of the internal components of the methanol range extender 2. After executing the corresponding command, the methanol range extender 2 feeds back the corresponding state to the range extender controller 3;

[0047] When providing power to the upper motor 4 and the main drive motor 6 , the vehicle controller 8 sends control commands to the upper motor controller 5 and the main drive motor controller 7 .

[0048] Furthermore, in the methanol-range-extended truck crane power system of the present invention, the methanol range extender 2 includes a methanol engine 21, a FISG motor 22, a FISG motor controller 23 and a gasoline pump 24. The methanol engine 21 and the FISG motor 22 are integrated and connected through a flywheel, the output end of the gasoline pump 24 is connected to the methanol engine 21, and the FISG motor 22 is connected to the energy storage device 1 through the FISG motor controller 23, so that the methanol engine 21 is used as a driving force, and methanol is used as fuel to drive the FISG motor 22 to generate electricity. When the methanol engine 21 is ignited, the gasoline pump 24 is used to supply fuel for ignition, and the methanol fuel is switched after the methanol engine 21 is started.

[0049] Furthermore, in the methanol-extended-range truck crane power system of the present invention, the energy storage device 1 includes a power battery 11 and a high-voltage control box 12. The high-voltage control box 12 is arranged on the power battery 11. The high-voltage control box 12 is used to monitor and control the input and output of the power battery 11. The input and output of the power battery 11 are effectively managed by the high-voltage control box 12, thereby ensuring the safety and service life of the battery.

[0050] Furthermore, in the methanol-range extended-range truck crane power system of the present invention, the control end of the high-voltage control box 12 is connected to the vehicle controller 8, the input end of the high-voltage control box 12 is connected to the FISG motor controller 23, and the output end of the high-voltage control box 12 is respectively connected to the upper motor controller 5 and the main drive motor controller 7.

[0051] The methanol range-extended truck crane power system control method of the present invention comprises:

[0052] like Figure 3As shown, when the vehicle controller 8 collects the state information of the methanol range extender 2 through the range extender controller 3, the vehicle controller 8 sends a constant speed control command to the range extender controller 3 to control the methanol range extender 2 to run at a constant speed. For example, the methanol engine 21 is in the most efficient fuel consumption area at 1400r / min, and the output power can meet the needs of the range extender generator at this time, so the range extender controller 3 controls the methanol engine 21 to run at a constant speed of 1400r / min;

[0053] When the vehicle controller 8 collects the status information of the energy storage device 1, when the power of the energy storage device 1 is less than or equal to 45%, the vehicle controller 8 sends a control command to the range extender controller 3 to control the methanol range extender 2 to charge the energy storage device 1. In order to prevent the overcharge of the power battery 11, all the power battery 11 charging related (including the methanol range extender 2) working conditions make the high-voltage control box 12 perform interlocking control according to the battery power, and increase the voltage interlocking between the high-voltage control box 12 and the vehicle controller 8. In the pure AC charging mode, the voltage is limited to 95% of the upper limit of the working voltage specified by the power battery 11; a similar situation occurs in the upper-mounted "charging while running" mode. In this mode, since the upper-mounted motor 4 will not work all the time, the power battery 11 actually works in a state of frequent switching of charging and discharging. At this time, the condition for the power battery 11 to be fully charged is set at 95% of the upper limit of the working voltage specified by the power battery 11;

[0054] On the contrary, when the power of the energy storage device 1 is greater than or equal to 70%, the vehicle controller 8 sends a control command to the range extender controller 3 to control the methanol range extender 2 to shut down;

[0055] When the vehicle controller 8 collects the state information of the energy storage device 1 and the energy storage device 1 is in DC charging or AC charging when stopped, the vehicle controller 8 sends a control command to the range extender controller 3 to control the methanol range extender 2 to prohibit operation;

[0056] When the vehicle controller 8 sends a power-on command to the energy storage device 1, the high-voltage control box 12 detects communication interruption during the power-on process, and the high-voltage control box 12 disconnects the relays in sequence according to the power-off process. For example: when receiving the power-on command: close the left battery pre-charge relay; after the left pre-charge relay is closed, delay 0.5S, and close the middle battery pre-charge relay; after the middle pre-charge relay is closed, delay 0.5S, and close the right battery pre-charge relay; after the right pre-charge relay is closed, delay 0.5S, and close the left battery main relay; after the left main relay is closed, delay 0.5S, and close the middle battery main relay; after the middle main relay is closed, delay 0.5S, and close the right battery main relay; after the right battery relay is closed, delay 0.5S, and close the total relay for pre-charge; after the total relay is pre-charged, delay 0.5S and close the total relay;

[0057] After receiving the high voltage command, the disconnection action is as follows: disconnect the main relay of the main relay; after the main relay is disconnected, delay 0.5S and disconnect the pre-charge of the main relay; after the pre-charge of the main relay is disconnected, delay 0.5S and disconnect the main relay of the left battery; after the main relay of the left battery is disconnected, delay 0.5S and disconnect the main relay of the middle battery; after the main relay of the middle battery is disconnected, delay 0.5S and disconnect the main relay of the right battery; after the main relay of the right battery is disconnected, delay 0.5S and disconnect the pre-charge relay of the left battery; after the pre-charge relay of the left battery is disconnected, delay 0.5S and disconnect the pre-charge relay of the middle battery; after the pre-charge relay of the middle battery is disconnected, delay 0.5S and disconnect the pre-charge relay of the right battery;

[0058] When communication interruption occurs during operation after power-on, all relay states remain unchanged;

[0059] When the range extender controller 3 receives the closing instruction from the vehicle controller 8, the range extender controller 3 closes the methanol range extender 2 pre-charging relay, delays 0.5S, and then closes the methanol range extender 2 main relay;

[0060] After receiving the disconnection command, the range extender controller 3 disconnects the main relay of the methanol range extender 2, delays 0.5S, and then the range extender controller 3 disconnects the pre-charging relay of the methanol range extender 2.

[0061] In summary, compared with the prior art, the methanol-range extended-type truck crane power system and control method of the present invention have the following advantages and beneficial effects: the present invention adopts a methanol engine as a power source, effectively reduces carbon emissions, avoids environmental pollution, and effectively improves endurance by connecting the vehicle controller, the range extender controller and the energy storage device, while improving the safety of the battery.

[0062] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A methanol range-extended truck crane power system, characterized in that: The methanol range-extended truck crane power system comprises: An energy storage device, the energy storage device is used to store and release electrical energy; A methanol range extender, the methanol range extender is connected to the energy storage device and is used to provide electrical energy to the energy storage device; A range extender controller, the range extender controller is connected to the range extender and is used to monitor the methanol range extender and control the start and stop, speed setting and power generation of the methanol range extender; An upper-mounted motor, which is connected to the energy storage device and is used to provide power for upper-mounted operations and the hydraulic system of the outriggers; A top motor controller, which is disposed between the energy storage device and the top motor and is used to control the start and stop of the top motor; A main drive motor, which is connected to the energy storage device and is used to provide driving force for the truck crane; A main drive motor controller, which is arranged between the main drive motor and the energy storage device and is used to control the start and stop of the main drive motor; A vehicle controller, the vehicle controller is respectively connected to the energy storage device, the range extender controller, the upper motor controller and the main drive motor controller, and is used to collect status information of the energy storage device, the methanol range extender, the upper motor and the main drive motor, and send control commands to the range extender controller, the upper motor controller and the main drive motor controller.

2. The methanol range-extended truck crane power system according to claim 1 is characterized in that: The methanol range extender includes a methanol engine, a FISG motor, a FISG motor controller and a gasoline pump. The methanol engine and the FISG motor are integrated and connected via a flywheel, the gasoline pump output end is connected to the methanol engine, and the FISG motor is connected to the energy storage device via the FISG motor controller.

3. The methanol range-extended truck crane power system according to claim 2 is characterized in that: The energy storage device includes a power battery and a high-voltage control box. The high-voltage control box is arranged on the power battery, and the high-voltage control box is used to monitor and control the input and output of the power battery.

4. The methanol range-extended truck crane power system according to claim 3 is characterized in that: The control end of the high-voltage control box is connected to the vehicle controller, the input end of the high-voltage control box is connected to the FISG motor controller, and the output end of the high-voltage control box is respectively connected to the upper motor controller and the main drive motor controller.

5. A method for controlling a methanol-range-extended truck crane power system, the method being applied to the methanol-range-extended truck crane power system according to any one of claims 1 to 4, comprising: When the vehicle controller collects the methanol range extender status information through the range extender controller, the vehicle controller sends a constant speed control command to the range extender controller to control the methanol range extender to run at a constant speed; When the vehicle controller collects the status information of the energy storage device, when the power of the energy storage device is less than or equal to 45%, the vehicle controller sends a control command to the range extender controller to control the operation of the methanol range extender to charge the energy storage device; On the contrary, when the power of the energy storage device is greater than or equal to 70%, the vehicle controller sends a control command to the range extender controller to control the methanol range extender to shut down; When the vehicle controller collects the energy storage device status information that the energy storage device is in DC charging or AC charging when stopped, the vehicle controller sends a control command to the range extender controller to control the methanol range extender to prohibit operation; When the vehicle controller sends a power-on command to the energy storage device, the high-voltage control box detects communication interruption during the power-on process, and the high-voltage control box disconnects the relays in sequence according to the power-off process; When communication interruption occurs during operation after power-on, all relay states remain unchanged; When the range extender controller receives the closing command from the vehicle controller, the range extender controller closes the methanol range extender pre-charging relay, delays 0.5S, and then closes the methanol range extender main relay; After receiving the disconnection command, the range extender controller disconnects the methanol range extender main relay, delays 0.5S, and then disconnects the methanol range extender pre-charge relay.

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