Hydrogen fuel cell driving system and portal crane

Abstract

The utility model relates to the technical field of cranes, and particularly discloses a hydrogen fuel cell driving system and a portal crane, the hydrogen fuel cell driving system comprises: a hydrogen fuel cell module; the heat dissipation module is used for dissipating heat of the hydrogen fuel cell module; a lithium battery module; the power distribution cabinet is electrically connected with the hydrogen fuel cell module, the heat dissipation module and the lithium battery module; the input end of the PCS cabinet is electrically connected with the output end of the power distribution cabinet; the input end of the main transformer is electrically connected with the output end of the PCS cabinet; the input end of the reactance cabinet is electrically connected with the output end of the main transformer; the input end of the current cabinet is electrically connected with the output end of the reactance cabinet; and the input end of the motor assembly is electrically connected with the output end of the current cabinet. The hydrogen fuel cell driving system and the portal crane are stable in power supply, capable of improving the energy utilization rate and environmentally friendly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cranes, in particular to a hydrogen fuel cell driving system and a portal crane. BACKGROUND

[0002] The energy supply modes of the portal crane mainly include the following two kinds: power supply and hybrid power supply. The power supply energy supply mode is relatively single and is greatly affected by the power grid. In the process of crane operation, once the power grid maintenance or failure occurs, the crane cannot continue to work, which affects the work efficiency; the energy utilization rate of the hybrid power supply energy supply mode is low, and greenhouse gases are emitted, which does not meet the green development requirement. SUMMARY

[0003] The purpose of the present application is to provide a hydrogen fuel cell driving system, which is stable in power supply, improves energy utilization rate and is green and environmentally friendly.

[0004] In order to achieve the above purpose, on the one hand, the present application provides a hydrogen fuel cell driving system, comprising:

[0005] a hydrogen fuel cell module;

[0006] a heat dissipation module for dissipating heat of the hydrogen fuel cell module;

[0007] a lithium battery module;

[0008] a power distribution cabinet electrically connected with the hydrogen fuel cell module, the heat dissipation module and the lithium battery module;

[0009] a PCS cabinet, an input end of which is electrically connected with an output end of the power distribution cabinet;

[0010] a main transformer, an input end of which is electrically connected with an output end of the PCS cabinet;

[0011] a reactance cabinet, an input end of which is electrically connected with an output end of the main transformer;

[0012] a current cabinet, an input end of which is electrically connected with an output end of the reactance cabinet; and

[0013] a motor assembly, an input end of which is electrically connected with an output end of the current cabinet.

[0014] In some embodiments, the hydrogen fuel cell module comprises a hydrogen fuel cell, an air compressor, a water pump, a hydrogen circulation pump and a DCF, the hydrogen fuel cell, the air compressor, the water pump and the hydrogen circulation pump are electrically connected with the power distribution cabinet through the DCF, the hydrogen fuel cell, the air compressor and the hydrogen circulation pump are in circulation communication, and the hydrogen fuel cell is in circulation communication with the water pump.

[0015] In some embodiments, the heat dissipation module comprises a high-pressure fan and a fan protector, the high-pressure fan is electrically connected to the power distribution cabinet through the fan protector, and the high-pressure fan is provided with a plurality of high-pressure fans and is used for ventilating and dissipating heat of the hydrogen fuel cell module.

[0016] In some embodiments, the lithium battery module comprises a lithium battery and a TMS, the lithium battery and the TMS are electrically connected to the power distribution cabinet respectively, the TMS is used for thermal management of the lithium battery, and the lithium battery is provided with a plurality of lithium batteries and is connected in series.

[0017] In some embodiments, the input end of the main transformer is electrically connected to a three-phase power supply.

[0018] In some embodiments, the output end of the main transformer is electrically connected to the input end of the current cabinet through an auxiliary transformer.

[0019] In some embodiments, the motor assembly comprises a lifting motor, a cart motor and a trolley motor, and the output end of the current cabinet is electrically connected to the lifting motor, the cart motor and the trolley motor.

[0020] In some embodiments, the motor assembly comprises a first frequency converter, a second frequency converter and a third frequency converter, the output end of the current cabinet is electrically connected to the lifting motor through the first frequency converter, the output end of the current cabinet is electrically connected to the cart motor through the second frequency converter, and the output end of the current cabinet is electrically connected to the trolley motor through the third frequency converter.

[0021] In some embodiments, the cart motor and the second frequency converter are each provided with a plurality of cart motors and a plurality of second frequency converters, and the plurality of cart motors are electrically connected to the plurality of second frequency converters one by one.

[0022] In another aspect, the application provides a gantry crane comprising a kinetic energy recovery device and the hydrogen fuel cell driving system of the aspect.

[0023] The application provides a hydrogen fuel cell driving system and a gantry crane, which has the beneficial effects that:

[0024] The hydrogen fuel cell module generates electric energy, and drives the motor assembly to run after passing through the power distribution cabinet, the main transformer, the electric reactance cabinet and the current cabinet, so that the power supply is stable, the energy utilization rate is improved, and the environment is green and environmentally friendly. The heat dissipation module can dissipate heat of the hydrogen fuel cell module, ensure the operation safety, and the lithium battery module can store electric energy to provide additional power for the gantry crane. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A principle schematic diagram of a hydrogen fuel cell driving system provided by some embodiments of the application is shown.

[0026] Figure 2 A schematic diagram of a hydrogen fuel cell module of a hydrogen fuel cell driving system according to some embodiments of the present application.

[0027] Figure 3 A schematic diagram of a heat dissipation module of a hydrogen fuel cell driving system according to some embodiments of the present application.

[0028] Figure 4 A schematic diagram of a lithium battery module of a hydrogen fuel cell driving system according to some embodiments of the present application.

[0029] In the figure: 1, hydrogen fuel cell module; 2, heat dissipation module; 3, lithium battery module; 4, power distribution cabinet; 5, PCS cabinet; 6, main transformer; 7, electric reactance cabinet; 8, current cabinet; 9, motor assembly; 10, hydrogen fuel cell; 11, air compressor; 12, water pump; 13, hydrogen circulation pump; 14, DCF; 15, high-pressure fan; 16, fan protector; 17, lithium battery; 18, TMS; 19, auxiliary transformer; 20, lifting motor; 21, trolley motor; 22, crab motor; 23, first frequency converter; 24, second frequency converter; 25, third frequency converter; 26, electric reactance cabinet protector. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0031] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. That is, the features with "first", "second" can explicitly or implicitly include one or more of the features. In addition, unless otherwise stated, the meaning of "multiple" is two or more.

[0032] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0033] As Figures 1-4As shown, the hydrogen fuel cell driving system provided by some embodiments of the present application comprises a hydrogen fuel cell module 1, a heat dissipation module 2, a lithium battery module 3, a power distribution cabinet 4, a PCS cabinet 5, a main transformer 6, a reactance cabinet 7, a current cabinet 8 and a motor assembly 9.

[0034] The hydrogen fuel cell module 1 is the energy supply core of the portal crane, providing stable and continuous power output, which can dynamically follow the actual power demand of the portal crane in real time. The power generation process only produces water, which is green and pollution-free, and can effectively reduce carbon emissions.

[0035] The supply voltage of the lithium battery module 3 is DC 618V, which provides a stable and reliable DC voltage platform for the hydrogen fuel cell module 1, and provides starting power support for the starting and running of the hydrogen fuel cell module 1 and the heat dissipation module 2. At the same time, the lithium battery module 3 and the hydrogen fuel cell module 1 cooperate to generate power output to meet the actual load power demand of the motor assembly 9. When the crane is parked, the energy generated by the kinetic energy recovery device of the crane can be effectively recovered and stored.

[0036] The heat dissipation module 2 is used for heat dissipation of the hydrogen fuel cell module 1, and provides cooling protection for the hydrogen fuel cell module 1 during operation, so as to ensure that the hydrogen fuel cell module 1 generates electricity at an appropriate temperature and maximizes the power generation efficiency.

[0037] The power distribution cabinet 4 is electrically connected with the hydrogen fuel cell module 1, the heat dissipation module 2 and the lithium battery module 3. The power distribution cabinet 4 distributes the electric energy of the hydrogen fuel cell module 1, the heat dissipation module 2 and the lithium battery module 3, and performs wire harness switching work.

[0038] The input end of the PCS cabinet 5 is electrically connected with the output end of the power distribution cabinet 4. The PCS cabinet 5 is a bidirectional DC / AC conversion device, which converts the DC power of the hydrogen fuel cell module 1 and the lithium battery module 3 into AC power for the motor assembly 9, and converts the feedback energy during the parking process of the portal crane into DC power for the lithium battery module 3 to store and utilize the energy.

[0039] The input end of the main transformer 6 is electrically connected with the output end of the PCS cabinet 7. The main transformer 6 boosts the 380V power generated by the hydrogen fuel cell module 1 and the 380V power supplied by the mains to AC 400V, which plays a role in stabilizing the voltage on the AC side.

[0040] The input end of the reactance cabinet 7 is electrically connected with the output end of the main transformer 6, and the reactance cabinet 3 is connected with a reactance cabinet controller 26. The reactance cabinet controller 26 is a control and alarm integrated system of the reactance cabinet 7, and mainly functions to monitor and control the operation of the reactance cabinet 7.

[0041] The input end of the current cabinet 8 is electrically connected with the output end of the reactance cabinet 7, and the current cabinet 8 mainly plays a role of current distribution, protection and control.

[0042] The input end of the motor assembly 9 is electrically connected with the output end of the current cabinet 8, and the motor assembly 9 serves as an output load of the gantry crane.

[0043] Based on the above structure, the hydrogen fuel cell module 1 generates electric energy, which drives the motor assembly 9 to operate after passing through the power distribution cabinet 4, the PCS cabinet 5, the main transformer 6, the reactance cabinet 7 and the current cabinet 8, so as to provide stable power supply and improve energy utilization rate and green environmental protection. In addition, the heat dissipation module 2 can dissipate heat for the hydrogen fuel cell module 1, so as to ensure safe operation, and the lithium battery module 1 can store electric energy to provide additional power for the gantry crane.

[0044] As shown in Figure 2 some embodiments, the hydrogen fuel cell module 1 includes a hydrogen fuel cell 10, an air compressor 11, a water pump 12, a hydrogen circulation pump 13 and a DCF 14, the hydrogen fuel cell 10, the air compressor 11, the water pump 12 and the hydrogen circulation pump 13 are electrically connected with the power distribution cabinet 4 through the DCF 14, the hydrogen fuel cell 10, the air compressor 11 and the hydrogen circulation pump 13 are in circulation communication, and the hydrogen fuel cell 10 is in circulation communication with the water pump 12. The air compressor provides oxygen required for electrochemical reaction of the hydrogen fuel cell 10 by compressing air and delivering it to the cathode of the hydrogen fuel cell 10, so as to improve the power density and efficiency of the hydrogen fuel cell 10 and reduce the overall size of the system. The water pump 12 increases the flow of cooling liquid to reduce the temperature of the hydrogen fuel cell 10, so as to ensure efficient operation of the hydrogen fuel cell 10 and prolong its service life. The hydrogen circulation pump 13 can recycle the hydrogen gas that has not been completely reacted to the inlet of the hydrogen fuel cell 10, so as to improve the utilization rate of hydrogen gas and reduce waste. The DCF 14 is a boost DC converter of the hydrogen fuel cell 10, which has high conversion efficiency and converts electric energy for use of the air compressor 11, the water pump 12, the hydrogen circulation pump 13 and the power distribution cabinet 4.

[0045] As shown in Figure 3 some embodiments, the heat dissipation module 2 includes a high-pressure fan 15 and a fan protector 16, the high-pressure fan 15 is electrically connected with the power distribution cabinet 4 through the fan protector 16, and the high-pressure fan 15 is provided with a plurality of high-pressure fans and is used for ventilating and dissipating heat for the hydrogen fuel cell module 1. The high-pressure fan 15 can generate high-pressure airflow to dissipate heat for the hydrogen fuel cell module 1, and the fan protector 16 can monitor parameters such as current, vibration and temperature of the high-pressure fan 15 in real time, so as to timely find abnormal conditions of the high-pressure fan 15, such as overload, short circuit, overheating and excessive vibration, so as to avoid faults.

[0046] As shown in Figure 4As shown, in some embodiments, the lithium battery module 3 comprises lithium batteries 17 and a TMS 18, the lithium batteries 17 and the TMS 18 are electrically connected with the power distribution cabinet respectively, the TMS 18 is used for thermal management of the lithium batteries 17, and the lithium batteries 17 are provided with a plurality of and are connected in series with each other. The TMS 18 as a thermal management unit comprises a condenser, an evaporator and a cooling pipeline, and is used for thermal management of the lithium batteries 17.

[0047] In some embodiments, the input end of the main transformer 6 is electrically connected with a three-phase power supply 18. The three-phase power supply 18 adopts municipal power supply, and is mainly used as power supply of the portal crane when the hydrogen fuel cell module 1 is not enabled to supply power.

[0048] In some embodiments, the hydrogen fuel cell driving system comprises an auxiliary transformer 19, and the output end of the main transformer 6 is electrically connected with the input end of the current cabinet 8 through the auxiliary transformer 19. The auxiliary transformer 19 is a power supply node of the motor assembly 9, and various levels of power supply are provided for the motor assembly 9 through the auxiliary transformer 19 to convert 400V voltage into 380V and 220V.

[0049] In some embodiments, the motor assembly 9 comprises a lifting motor 20, a trolley motor 22 and a crab motor 21, and the output end of the current cabinet 8 is electrically connected with the lifting motor 20, the trolley motor 22 and the crab motor 21.

[0050] In some embodiments, the motor assembly comprises a first frequency converter 23, a second frequency converter 24 and a third frequency converter 25, the output end of the current cabinet 8 is electrically connected with the lifting motor 20 through the first frequency converter 23, the output end of the current cabinet 8 is electrically connected with the trolley motor 22 through the second frequency converter 24, and the output end of the current cabinet 8 is electrically connected with the crab motor 21 through the third frequency converter 25. The first frequency converter 23, the second frequency converter 24 and the third frequency converter 25 are used as direct current to alternating current devices, and alternating current of a specific frequency is provided for the lifting motor 20, the trolley motor 22 and the crab motor 21.

[0051] In some embodiments, the trolley motor 22 and the second frequency converter 24 are both provided with a plurality of, and the plurality of trolley motors 24 are electrically connected with the plurality of second frequency converters 22 one by one.

[0052] The portal crane provided by some embodiments of the hydrogen fuel cell driving system further comprises a kinetic energy recovery device.

[0053] The above description is only the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. A hydrogen fuel cell drive system characterized by comprising: The system comprises: a hydrogen fuel cell module; a heat dissipation module for dissipating heat of the hydrogen fuel cell module; a lithium battery module; a power distribution cabinet electrically connected with the hydrogen fuel cell module, the heat dissipation module and the lithium battery module; a PCS cabinet, the input end of which is electrically connected with the output end of the power distribution cabinet; a main transformer, the input end of which is electrically connected with the output end of the PCS cabinet; a reactance cabinet, the input end of which is electrically connected with the output end of the main transformer; a current cabinet, the input end of which is electrically connected with the output end of the reactance cabinet; and a motor assembly, the input end of which is electrically connected with the output end of the current cabinet. The hydrogen fuel cell module comprises a hydrogen fuel cell, an air compressor, a water pump, a hydrogen circulation pump and a DCF, the hydrogen fuel cell, the air compressor, the water pump and the hydrogen circulation pump are electrically connected with the power distribution cabinet through the DCF, the hydrogen fuel cell, the air compressor and the hydrogen circulation pump are in circulation communication, and the hydrogen fuel cell is in circulation communication with the water pump.

2. The hydrogen fuel cell drive system of claim 1, wherein, The heat dissipation module comprises a high-pressure fan and a fan protector, the high-pressure fan is electrically connected with the power distribution cabinet through the fan protector, and the high-pressure fan is provided with a plurality of high-pressure fans and is used for ventilating and dissipating heat of the hydrogen fuel cell module.

3. The hydrogen fuel cell drive system of claim 1, wherein The lithium battery module comprises a lithium battery and a TMS, the lithium battery and the TMS are electrically connected with the power distribution cabinet respectively, the TMS is used for heat management of the lithium battery, and the lithium battery is provided with a plurality of lithium batteries which are in series connection with each other.

4. The hydrogen fuel cell drive system of claim 1, wherein, The input end of the main transformer is electrically connected with a three-phase power supply.

5. The hydrogen fuel cell drive system of claim 1, wherein, The system comprises an auxiliary transformer, the output end of the main transformer is electrically connected with the input end of the current cabinet through the auxiliary transformer.

6. The hydrogen fuel cell drive system of claim 1, wherein, The motor assembly comprises a lifting motor, a cart motor and a trolley motor, and the output end of the current cabinet is electrically connected with the lifting motor, the cart motor and the trolley motor.

7. The hydrogen fuel cell drive system of claim 1, wherein, The motor assembly comprises a first frequency converter, a second frequency converter and a third frequency converter, the output end of the current cabinet is electrically connected with the lifting motor through the first frequency converter, the output end of the current cabinet is electrically connected with the cart motor through the second frequency converter, and the output end of the current cabinet is electrically connected with the trolley motor through the third frequency converter.

8. The hydrogen fuel cell drive system of claim 7, wherein, The cart motor and the second frequency converter are each provided with a plurality of cart motors and a plurality of second frequency converters which are electrically connected in one-to-one correspondence.

9. The hydrogen fuel cell drive system of claim 8, wherein, The system comprises a kinetic energy recovery device and the hydrogen fuel cell driving system according to any one of claims 1-9.

10. A portal crane, characterized in that ​

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