Power control system for hydrogen energy automobile crane and power control method thereof

Abstract

The invention discloses a power control system for a hydrogen energy automobile crane and a power control method thereof.The power control system comprises a power battery, a hydrogen fuel cell, a VCU module, a management and control box module, a vehicle-mounted charger, a controller module and a power distribution cabinet, and the power battery is electrically connected to the management and control box module, the hydrogen fuel cell and the VCU module; the vehicle-mounted charger is electrically connected to the control box module, the vehicle-mounted charger is electrically connected with an alternating current charging socket, the power distribution cabinet is electrically connected to the vehicle-mounted charger, and the controller module is electrically connected with a main drive motor, an air compressor, an electric power steering device and a hoisting motor; the structure has good practicability, the power battery is charged through the hydrogen fuel battery, suspended load operation can be maintained when charging conditions are not met and the electric quantity of the power battery is insufficient, the cruising ability of the whole machine is improved, and the working efficiency is guaranteed; and the electric energy can be reasonably distributed to charge the power battery and drive the controller module through the control box module.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen-powered truck cranes, and in particular relates to a power control system and a power control method for a hydrogen-powered truck crane. Background Art

[0002] At present, most truck cranes are fuel-powered, which is not economical, noisy and polluting. Truck cranes are divided into two working conditions in daily use: driving and hoisting. During hoisting, the engine needs to be started frequently, and the load power fluctuation is large, so that the engine cannot always be in the best working efficiency point, which directly leads to its poor economy and aggravates fuel consumption. When the vehicle is in braking or downhill state, the energy recovery module cannot be used, and the energy can only be dissipated in the form of heat energy, resulting in great energy waste and not environmentally friendly.

[0003] In the existing technology, new energy truck cranes are still in their infancy. Although some pure electric truck crane models utilize clean energy and can also carry out energy recovery modules, since many truck crane operations are in the field and there are no charging conditions at all, the endurance of pure electric truck cranes is difficult to guarantee, which greatly affects the efficiency of lifting operations. Therefore, it is difficult to be used in practice. In summary, there is an urgent need for a power control system and a power control method for a hydrogen truck crane. Summary of the invention

[0004] In order to solve part or all of the technical problems existing in the above-mentioned prior art, the present invention provides a power control system and a power control method for a hydrogen-powered truck crane.

[0005] On the one hand, the power control system for a hydrogen-powered truck crane provided by the present invention includes a power battery, a hydrogen fuel cell, a VCU module, a control box module, an on-board charger, a controller module, and a power distribution cabinet, wherein:

[0006] The power battery is electrically connected to the control box module, the hydrogen fuel cell, and the VCU module;

[0007] The on-board charger is electrically connected to the control box module, the on-board charger is electrically connected to an AC charging socket, and the power distribution cabinet is electrically connected to the on-board charger;

[0008] The controller module is electrically connected to the main drive motor, the air compressor, the electric power steering device, and the hoisting motor. The controller module controls the main drive motor, the air compressor, the electric power steering device, and the hoisting motor by transmitting signals. The controller module drives the main drive motor, the air compressor, the electric power steering device, and the hoisting motor through the power provided by the control box module.

[0009] Furthermore, in the above power control system for the hydrogen-powered truck crane, the controller module is electrically connected to a DCDC module, and the DCDC module is electrically connected to a battery.

[0010] Furthermore, in the above-mentioned power control system for the hydrogen-powered truck crane, the control box module is electrically connected to a DC socket.

[0011] As a specific implementation, in the above-mentioned power control system for the hydrogen-powered truck crane, the main drive motor is electrically connected to the power battery via an energy recovery module, and the main drive motor can supply power to the power battery via the energy recovery module.

[0012] Furthermore, in the above-mentioned power control system for the hydrogen-powered truck crane, the main drive motor is used to drive the hydrogen-powered truck crane to travel.

[0013] Furthermore, in the above-mentioned power control system for the hydrogen-powered truck crane, the hoisting motor is used to drive a hydraulic pump provided on the hydrogen-powered truck crane, and the hydraulic pump is used to control a slewing mechanism, outriggers, and lifting arm provided on the hydrogen-powered truck crane.

[0014] On the other hand, the power control method for a hydrogen-powered truck crane provided by the present invention comprises:

[0015] Plug-in mode: start the hydrogen truck crane. When the control box module detects that the on-board charger is working, it is in plug-in mode. When the control box module detects that the load power of the whole machine is less than the power supply power of the on-board charger, the control box module transmits part of the power provided by the on-board charger to the controller module to drive the controller module and then drive the hoisting motor, and transmits the other part to the power battery to charge it. At this time, if the power of the power battery is a first value, a first signal is sent to the control box module. After receiving the first signal, the control box module controls to turn off the on-board charger and transmits the power provided by the power battery to the controller module for power supply;

[0016] Then, as the hydrogen-powered truck crane operates, if the power battery consumes to a second value, the power battery sends a second signal to the control box module. After receiving the second signal, the control box module controls the start-up of the on-board charger. The control box module transmits part of the power provided by the on-board charger to the controller module to drive the controller module and then drive the hoisting motor, and transmits the other part to the power battery to charge it.

[0017] When the control box module detects that the load power of the whole machine is greater than the power supply power of the on-board charger, the control box module transmits all the electric energy provided by the on-board charger to the controller module to drive the hoisting motor.

[0018] Unplugged mode: start the hydrogen-powered truck crane. When the control box module detects that the onboard charger is not working, it is in unplugged mode. When the VCU module detects that the power of the power battery is a third value, the power battery is used to power the control box module. The control box module transmits power to the controller module to drive the main drive motor, the air compressor, the electric power steering device, and the hoisting motor.

[0019] When the VCU module monitors that the power battery has a fourth value, the VCU module controller module controls the hydrogen fuel cell to start, charges the power battery through the hydrogen fuel cell, and then the power battery supplies power to the control box module. The control box module transmits electrical energy to the controller module, thereby driving the main drive motor, the air compressor, the electric power steering device, and the hoisting motor.

[0020] As a specific implementation, in the power control method for the hydrogen-powered truck crane, the first value is that the remaining power of the power battery is above 90%, and the second value is that the remaining power of the power battery is below 60%.

[0021] As a specific implementation, in the above-mentioned power control method for a hydrogen-powered truck crane, the third value is that the remaining power of the power battery is above 30%, and the fourth value is that the remaining power of the power battery is below 29%.

[0022] As a specific implementation, in the above-mentioned power control method for a hydrogen-powered truck crane, when the on-board charger supplies power through the power distribution cabinet, the on-board charger adjusts the charging current of the power distribution cabinet according to the charging power of the power distribution cabinet.

[0023] The power control system and power control method for the hydrogen energy truck crane of the present invention have the following advantages and positive effects:

[0024] (1) The present invention charges the power battery through a hydrogen fuel cell, and can maintain the hoisting operation when the charging conditions are not met and the power battery is insufficient. In the non-plug-in extended-range mode, it is always at the optimal power point and maintains the optimal state to charge the power battery. The use of hydrogen fuel cells improves the adaptability of the whole machine to the environment in terms of energy supply, and improves the endurance of the whole machine, ensuring work efficiency;

[0025] (2) In the present invention, the control box module can select the energy provided by the on-board charger according to the load power and the charging power, and reasonably allocate it to charging the power battery and driving the controller module, so that the distribution of electric energy in the system can be dynamically adjusted to better adapt to different working conditions;

[0026] (3) The present invention is provided with an on-board charger. When the on-board charger is powered by the power distribution cabinet in the factory, the on-board charger can switch the maximum allowable charging power according to the actual situation on site, so as to achieve the purpose of limiting the charging current and protecting the safety of the distribution line. This can effectively prevent the charging current of the on-board charger from being greater than the current carrying capacity of the distribution box cable, thereby ensuring the safety of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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:

[0028] Figure 1 The present invention is a schematic diagram of the working principle of the power control system for the hydrogen energy truck crane.

[0029] Description of reference numerals:

[0030] 1-power battery, 2-hydrogen fuel cell, 3-VCU module, 4-control box module, 5-on-board charger, 6-controller module, 7-power distribution cabinet, 8-AC charging socket, 10-main drive motor, 11-air compressor, 12-electric power steering device, 13-hoisting motor, 14-DCDC module, 15-battery, 16-DC socket, 17-energy recovery module. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figure 1 As shown, the present invention provides a power control system and a power control method for a hydrogen energy truck crane.

[0033] On the one hand, the present invention discloses a power control system for a hydrogen energy truck crane, comprising a power battery 1, a hydrogen fuel cell 2, a VCU module 3, a control box module 4, an on-board charger 5, a controller module 6, and a power distribution cabinet 7. A BMS unit is arranged in the control box module 4. Due to space limitations, the power battery 1 is located at the counterweight part of the upper part of the vehicle, and other high-voltage power components are located at the lower part of the vehicle. Since there is relative rotation between the upper and lower parts of the vehicle, a mid-return slip ring is used in the middle to realize energy conversion between the upper and lower parts of the vehicle. Among them, the power battery 1 is electrically connected to the control box module 4, the hydrogen fuel cell 2, and the VCU module 3. The VCU module 3 can transmit control signals to the hydrogen fuel cell 2 and the power battery 1, and can also receive the remaining power signal transmitted in real time by the power battery 1; the on-board charger 5 is electrically connected to the control box module 4, the on-board charger 5 is electrically connected to the AC charging socket 8, and the electric energy is transmitted from the AC charging socket 8 to the control box module 4 through the on-board charger 5. The distribution cabinet 7 is electrically connected to the on-board charger 5, and the electric energy can also be transmitted from the distribution cabinet 7 to the control box module 4 through the on-board charger 5; the hydrogen energy truck crane will have a long period of pause during operation, and the on-board charger 5 can be used to continuously replenish the power battery 1 to extend the battery life of the whole machine. The controller module 6 is electrically connected to the main drive motor 10, the air compressor 11, the electric power steering device 12, and the hoisting motor 13. The controller module 6 controls the main drive motor 10, the air compressor 11, the electric power steering device 12, and the hoisting motor 13 by transmitting signals. The controller module 6 drives the main drive motor 10, the air compressor 11, the electric power steering device 12, and the hoisting motor 13 through the power provided by the control box module 4.

[0034] Furthermore, in the power control system for the hydrogen-powered truck crane of the present invention, the controller module 6 is electrically connected to the DCDC module 14 , and the DCDC module 14 is electrically connected to the battery 15 .

[0035] Furthermore, in the power control system for the hydrogen-powered truck crane of the present invention, the control box module 4 is electrically connected to a DC socket 16 .

[0036] As a specific implementation, in the power control system for a hydrogen-powered truck crane of the present invention, the main drive motor 10 is electrically connected to the power battery 1 through the energy recovery module 17, and the main drive motor 10 can supply power to the power battery 1 through the energy recovery module 17. More specifically, during the entire process, if the entire machine is in a braking state or a downhill state, the main drive motor 10 emits a negative torque through the energy recovery module 17 to recover energy, and the power battery 1 is charged in this state.

[0037] Furthermore, in the power control system for the hydrogen-powered truck crane of the present invention, the main drive motor 10 is used to drive the hydrogen-powered truck crane to travel, and the main drive motor 10 is powered by the controller module 6 .

[0038] Furthermore, in the power control system for the hydrogen-powered truck crane of the present invention, the hoisting motor 13 is used to drive the hydraulic pump provided on the hydrogen-powered truck crane. The hoisting motor 13 is powered by the controller module 6, and the hydraulic pump is used to control the slewing mechanism, outriggers, and lifting arm provided on the hydrogen-powered truck crane.

[0039] On the other hand, the power control method for a hydrogen-powered truck crane of the present invention is implemented using the above-mentioned power control system, and specifically includes:

[0040] Plug-in mode: start the hydrogen truck crane. When the control box module 4 detects that the on-board charger 5 is working, it is in plug-in mode. When the control box module 4 detects that the load power of the whole machine is less than the power supply power of the on-board charger 5, the control box module 4 transmits part of the power provided by the on-board charger 5 to the controller module 6 to drive the controller module 6 and then drive the hoisting motor 13. The other part is transmitted to the power battery 1 for charging. This mode is charging while hoisting. At this time, if the power of the power battery 1 is a first value, a first signal is sent to the control box module 4. After receiving the first signal, the control box module 4 controls to turn off the on-board charger 5. More specifically, the control box module 4 requests a current of 0A to the on-board charger 5, and at the same time controls the on-board charger 5 to turn off the output, and turns off the AC slow charging without disconnecting the AC contactor, and transmits the power provided by the power battery 1 to the controller module 6 for power supply. At this time, the power required for the hoisting motor and accessories all comes from the power battery 1.

[0041] The hoisting process is a power-consuming process without energy feedback, so the power is consumed quickly. In order to prevent the power battery 1 from being insufficient due to continuous power consumption after being fully charged, as the hydrogen-powered truck crane operates, if the power of the power battery 1 is consumed to a second value, the power battery 1 sends a second signal to the control box module 4. After receiving the second signal, the control box module 4 controls the start of the on-board charger 5. The control box module 4 transmits part of the power provided by the on-board charger 5 to the controller module 6 to drive the controller module 6 and then drive the hoisting motor 13, and the other part is transmitted to the power battery 1 to charge it. In general, during the operation of the hydrogen-powered truck crane, the control box module 4 always monitors the power of the power battery 1, and determines the start and stop of the on-board charger 5 according to the power of the power battery 1 and the set first and second values;

[0042] When the control box module 4 detects that the load power of the whole machine is greater than the power supply power of the on-board charger 5, the on-board charger 5 and the battery form a complementary power supply. The complementary power supply transmits all the electric energy provided by the on-board charger 5 to the controller module 6 through the control box module 4 for power distribution, which is used to drive the hoisting motor 13.

[0043] Unplugged mode: start the hydrogen-powered truck crane. When the control box module 4 detects that the onboard charger 5 is not working, it is in unplugged mode. When the VCU module 3 detects that the power level of the power battery 1 is the third value, the power battery 1 is used to supply power to the control box module 4. The control box module 4 transmits the power to the controller module 6 to drive the main drive motor 10, the air compressor 11, the electric power steering device 12, and the hoisting motor 13. At this time, the vehicle is in unplugged pure electric mode.

[0044] When the VCU module 3 monitors that the power level of the power battery 1 is the fourth value, the VCU module 3 controller module 6 controls the hydrogen fuel cell 2 to start, and the hydrogen fuel cell 2 generates electricity to charge the power battery 1, and the power battery 1 then supplies power to the control box module 4, and the control box module 4 transmits the electricity to the controller module 6, thereby driving the main drive motor 10, the air compressor 11, the electric power steering device 12, and the hoisting motor 13. At this time, the vehicle is in the unplugged extended-range mode. Since this mode adopts a series connection, the hydrogen fuel cell 2 can always be at the optimal power point.

[0045] As a specific implementation, in the power control method for a hydrogen-powered truck crane of the present invention, the vehicle cab is provided with a driving mode switching button, which can switch between a normal mode, a power mode and an economic mode.

[0046] As a specific implementation, in the power control method for a hydrogen truck crane of the present invention, the first value is that the remaining power of the power battery 1 is above 90%, and the second value is that the remaining power of the power battery 1 is below 60%.

[0047] As a specific implementation, in the power control method for a hydrogen truck crane of the present invention, the third value is that the remaining power of the power battery 1 is above 30%, and the fourth value is that the remaining power of the power battery 1 is below 29%.

[0048] Furthermore, in the power control method for a hydrogen-powered truck crane of the present invention, when the on-board charger 5 supplies power through the power distribution cabinet 7, the on-board charger 9 adjusts the charging current of the power distribution cabinet according to the charging power of the power distribution cabinet 7. This is set up because the cable specifications arranged in the distribution box are different in different scenarios, and the current carrying capacity of cables of different specifications is also different. In order to prevent the charging current from being greater than the cable current carrying capacity, the on-board charger 9 can switch the maximum charging power according to the actual situation on site, so as to achieve the purpose of limiting the charging current and protecting the safety of the distribution line.

[0049] In summary, compared with the prior art, the power control system and power control method for hydrogen-powered truck crane of the present invention have the following advantages and positive effects:

[0050] (1) The present invention charges the power battery 1 through the hydrogen fuel cell 2, and can maintain the hoisting operation when the charging conditions are not met and the power battery 1 is insufficient. In the non-plug-in extended-range mode, it is always at the optimal power point and maintains the optimal state to charge the power battery 1. The use of the hydrogen fuel cell 2 improves the adaptability of the whole machine to the environment in terms of energy supply, and improves the endurance of the whole machine, ensuring work efficiency;

[0051] (2) In the present invention, the control box module 4 can select the energy provided by the on-board charger 5 according to the load power and the charging power, and reasonably allocate it to charging the power battery 1 and driving the controller module 6, so that the distribution of electric energy in the system can be dynamically adjusted to better adapt to different working conditions;

[0052] (3) The present invention is provided with an on-board charger 9. When the on-board charger 5 is powered by the power distribution cabinet 7 in the factory, the on-board charger 9 can switch the maximum allowable charging power according to the actual situation on site, so as to achieve the purpose of limiting the charging current and protecting the safety of the distribution line. This can effectively prevent the charging current of the on-board charger 5 from being greater than the current carrying capacity of the distribution box cable, thereby ensuring the safety of power supply.

[0053] 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.

[0054] 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 power control system for a hydrogen-powered truck crane, characterized in that: The power control system for the hydrogen-powered truck crane includes a power battery, a hydrogen fuel cell, a VCU module, a control box module, an on-board charger, a controller module, and a power distribution cabinet, wherein: The power battery is electrically connected to the control box module, the hydrogen fuel cell, and the VCU module; The on-board charger is electrically connected to the control box module, the on-board charger is electrically connected to an AC charging socket, and the power distribution cabinet is electrically connected to the on-board charger; The controller module is electrically connected to the main drive motor, the air compressor, the electric power steering device, and the hoisting motor. The controller module controls the main drive motor, the air compressor, the electric power steering device, and the hoisting motor by transmitting signals. The controller module drives the main drive motor, the air compressor, the electric power steering device, and the hoisting motor through the power provided by the control box module.

2. The power control system for a hydrogen truck crane according to claim 1, characterized in that: The controller module is electrically connected to a DCDC module, and the DCDC module is electrically connected to a battery.

3. The power control system for a hydrogen truck crane according to claim 1, characterized in that: The control box module is electrically connected to a DC socket.

4. The power control system for a hydrogen truck crane according to claim 1, characterized in that: The main drive motor is electrically connected to the power battery via an energy recovery module, and the main drive motor can supply power to the power battery via the energy recovery module.

5. The power control system for a hydrogen truck crane according to claim 1, characterized in that: The main drive motor is used to drive the hydrogen energy truck crane to move.

6. The power control system for a hydrogen truck crane according to claim 1, characterized in that: The hoisting motor is used to drive the hydraulic pump provided on the hydrogen-powered truck crane, and the hydraulic pump is used to control the slewing mechanism, outriggers and lifting arm provided on the hydrogen-powered truck crane.

7. A power control method for a hydrogen-powered truck crane, the power control method being implemented using the power control system according to any one of claims 1 to 6, comprising: Plug-in mode: start the hydrogen truck crane. When the control box module detects that the on-board charger is working, it is in plug-in mode. When the control box module detects that the load power of the whole machine is less than the power supply power of the on-board charger, the control box module transmits part of the power provided by the on-board charger to the controller module to drive the controller module and then drive the hoisting motor, and transmits the other part to the power battery to charge it. At this time, if the power of the power battery is a first value, a first signal is sent to the control box module. After receiving the first signal, the control box module controls to turn off the on-board charger and transmits the power provided by the power battery to the controller module for power supply; Then, as the hydrogen-powered truck crane operates, if the power battery consumes to a second value, the power battery sends a second signal to the control box module. After receiving the second signal, the control box module controls the start-up of the on-board charger. The control box module transmits part of the power provided by the on-board charger to the controller module to drive the controller module and then drive the hoisting motor, and transmits the other part to the power battery to charge it. When the control box module detects that the load power of the whole machine is greater than the power supply power of the on-board charger, the control box module transmits all the power provided by the on-board charger to the controller module to drive the hoisting motor; Unplugged mode: start the hydrogen-powered truck crane. When the control box module detects that the onboard charger is not working, it is in unplugged mode. When the VCU module detects that the power of the power battery is a third value, the power battery is used to power the control box module. The control box module transmits power to the controller module to drive the main drive motor, the air compressor, the electric power steering device, and the hoisting motor. When the VCU module monitors that the power battery has a fourth value, the VCU module controller module controls the hydrogen fuel cell to start, charges the power battery through the hydrogen fuel cell, and then the power battery supplies power to the control box module. The control box module transmits electrical energy to the controller module, thereby driving the main drive motor, the air compressor, the electric power steering device, and the hoisting motor.

8. The power control method for a hydrogen-powered truck crane according to claim 7, characterized in that: The first value is when the remaining power of the power battery is greater than 90%, and the second value is when the remaining power of the power battery is less than 60%.

9. The power control method for a hydrogen truck crane according to claim 7, characterized in that: The third value is that the remaining power of the power battery is greater than 30%, and the fourth value is that the remaining power of the power battery is less than 29%.

10. The power control method for a hydrogen-powered truck crane according to claim 7, characterized in that: When the on-board charger is powered by the power distribution cabinet, the on-board charger adjusts the charging current of the power distribution cabinet according to the charging power of the power distribution cabinet.

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