Hybrid power control system, method and device for electric motor car

Abstract

The invention provides a hybrid power control system, method and device of an electric motor car, and relates to the technical field of power systems. The system comprises a first power source, a second power source, a hydraulic flow direction switching valve and a hydraulic system, the first power source and the second power source are connected with the hydraulic system through the hydraulic flow direction switching valve, and the hydraulic flow direction switching valve is used for controlling the first power source or the second power source to provide power for the hydraulic system; the first power source is used for providing power when the electric motor car is in a running state; and the second power source is used for providing power when the electric motor car is in the loading state, and the loading state is the working state that the electric motor car controls the lifting device to work when the electric motor car is in the parking state. Through switching of the power source, the combustion risk of the high-voltage battery of the vehicle in the airport pickup operation process can be effectively reduced.

Description

Background Art

[0002] Airline catering vehicles are special vehicles for airports, specially used for catering on passenger planes. Currently, most of the airline catering vehicles used in airports are electric, that is, they are composed of a high-voltage electric chassis and an upper part. The high-voltage electric chassis is used to provide energy through the chassis high-voltage battery during the vehicle's driving process. The upper part includes a compartment for storing food and a four-way platform set on one side of the compartment. By driving the upper part up to approach the aircraft's cabin door, food is delivered to the aircraft.

[0003] However, in the related art, since the electric aviation food truck uses the original vehicle's high-voltage system to provide power energy when operating on the aircraft, there is a risk of high-voltage battery fire.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The present disclosure provides a hybrid power control system, method and device for an electric locomotive, which at least to some extent overcome the problem of high-voltage battery fire risk in the related art.

[0006] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0007] According to one aspect of the present disclosure, a hybrid power control system of an electric locomotive is provided, wherein the electric locomotive is provided with a lifting device for performing a lifting action and a hydraulic system for driving the lifting device to perform the lifting action, wherein the hydraulic system is powered by a first power source or a second power source, wherein the first power source is a power source inside the electric locomotive, and the second power source is a power source external to the electric locomotive; the system comprises: the first power source, the second power source, a hydraulic flow direction switching valve, and the hydraulic system, wherein the first power source and the second power source are respectively connected to the hydraulic system via the hydraulic flow direction switching valve, and the hydraulic flow direction switching valve is used to control the first power source or the second power source to provide power to the hydraulic system;

[0008] The first power source is used to provide power when the electric locomotive is in a driving state; the second power source is used to provide power when the electric locomotive is in a loading state, wherein the loading state is a working state in which the electric locomotive controls the operation of the lifting device when the electric locomotive is in a parking state.

[0009] In some embodiments, the hydraulic flow direction switching valve includes: a hydraulic shuttle valve or an electromagnetic reversing valve.

[0010] In some embodiments, the second power source includes: a driver, an AC motor and a hydraulic oil pump, wherein the AC motor is connected to the driver and the hydraulic oil pump respectively, and the AC motor is controlled by the driver so that the AC motor drives the hydraulic oil pump to provide power for the hydraulic system of the electric locomotive.

[0011] In some embodiments, the driver is a contactor, and the hydraulic oil pump is a variable pump, wherein the variable pump is also provided with a hydraulic oil pump displacement regulator for controlling the hydraulic oil displacement of the variable pump.

[0012] In some embodiments, the driver is a frequency converter, and the hydraulic oil pump is a quantitative pump.

[0013] In some embodiments, the system also includes: a locomotive controller; the locomotive controller is connected to the first power source and the second power source respectively, and the locomotive controller is used to monitor the operating status information of the second power source, so that when the operating status of the second power source becomes abnormal, the first power source is controlled to replace the second power source to provide power to the hydraulic system of the electric locomotive.

[0014] In some embodiments, the electric vehicle is an electric aviation catering vehicle, and the lifting device is used to lift the body of the electric aviation catering vehicle so that the body can meet the target aircraft.

[0015] According to another aspect of the present disclosure, a hybrid power control method for an electric locomotive is also provided, including: monitoring the working state of the electric locomotive; if the electric locomotive is in a driving state, controlling a first power source to provide power to the electric locomotive, wherein the first power source is a power source inside the electric locomotive; if the electric locomotive is in a loading state, controlling a second power source to provide power to the electric locomotive, wherein the loading state is a working state in which the electric locomotive controls the operation of a lifting device on the electric locomotive when the electric locomotive is parked, and the second power source is a power source external to the electric locomotive.

[0016] In some embodiments, if the electric locomotive is in the upper loading state, after the second power source provides power to the electric locomotive, the method also includes: monitoring the operating status information of the second power source; when the operating status of the second power source is abnormal, controlling the first power source to replace the second power source to provide power to the electric locomotive.

[0017] According to another aspect of the present disclosure, a hybrid power control device for an electric locomotive is also provided, including: a working status detection module for monitoring the working status of the electric locomotive; a first power source determination module for controlling the first power source to provide power to the electric locomotive if the electric locomotive is in a driving state, wherein the first power source is a power source inside the electric locomotive; a second power source determination module for controlling the second power source to provide power to the electric locomotive if the electric locomotive is in a loading state, wherein the loading state is a working state in which the electric locomotive controls the operation of a lifting device on the electric locomotive when the electric locomotive is in a parking state, and the second power source is a power source external to the electric locomotive.

[0018] According to another aspect of the present disclosure, an electronic device is also provided, which includes: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any one of the above-mentioned hybrid power control methods for an electric locomotive by executing the executable instructions.

[0019] According to another aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the hybrid power control method of an electric locomotive described in any one of the above is implemented.

[0020] According to another aspect of the present disclosure, a computer program product is also provided, including a computer program, wherein when the computer program is executed by a processor, the hybrid power control method of an electric locomotive is implemented.

[0021] The hybrid power control system, method and device of the electric locomotive provided in the embodiments of the present disclosure, the first power source and the second power source in the embodiments of the present disclosure are respectively connected to the hydraulic system through the hydraulic flow direction switching valve, and the first power source or the second power source is controlled by the hydraulic flow direction switching valve to provide power to the hydraulic system. When the electric locomotive is in the driving state, the power is provided by the first power source, and when the electric locomotive is in the upper loading state, the power is provided by the second power source. The embodiments of the present disclosure can effectively reduce the combustion risk of the vehicle's high-voltage battery during the pick-up operation by switching the power source.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0024] Figure 1 A schematic diagram of a hybrid power control system for an electric locomotive is shown;

[0025] Figure 2 A schematic diagram showing a second power source structure;

[0026] Figure 3 A schematic diagram showing another second power source structure;

[0027] Figure 4 A schematic diagram showing another second power source structure;

[0028] Figure 5 A schematic diagram of a hybrid power control system for another electric locomotive is shown;

[0029] Figure 6 A schematic diagram of a hybrid power control system for another electric locomotive is shown;

[0030] Figure 7 A flow chart showing a hybrid power control method for an electric locomotive is shown;

[0031] Figure 8 A flow chart of a control method for enabling a second power source of an electric locomotive is shown;

[0032] Fig. 9 A schematic diagram of a hybrid power control device for an electric locomotive is shown;

[0033] Fig.10 A block diagram of an electronic device in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0035] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0036] The specific implementation of the embodiment of the present disclosure is described in detail below with reference to the accompanying drawings.

[0037] Figure 1 FIG. 1 shows a schematic diagram of a hybrid power control system for an electric locomotive. Figure 1 As shown, the system may include a first power source 101 , a second power source 102 , a hydraulic flow direction switching valve 103 , a hydraulic system 104 and a lifting device 105 .

[0038] In one embodiment of the present disclosure, the electric locomotive is provided with a lifting device 105 for performing a lifting action and a hydraulic system 104 for driving the lifting device to perform the lifting action. The hydraulic system 104 is powered by a first power source 101 or a second power source 102. The first power source 101 is a power source inside the electric locomotive, and the second power source 102 is a power source outside the electric locomotive.

[0039] In one embodiment of the present disclosure, the first power source 101 and the second power source 102 are respectively connected to the hydraulic system 104 through the hydraulic flow direction switching valve 103, and the hydraulic flow direction switching valve 103 is used to control the first power source 101 or the second power source 102 to provide power to the hydraulic system 104.

[0040] In one embodiment of the present disclosure, the first power source 101 is used to provide power when the electric locomotive is in a driving state.

[0041] In one embodiment of the present disclosure, the second power source 102 is used to provide power when the electric vehicle is in a loading state, wherein the loading state is a working state in which the electric vehicle controls the operation of the lifting device 105 when the electric vehicle is parked.

[0042] As can be seen from the above, the hybrid power control system, method and device of the electric locomotive provided in the embodiments of the present disclosure, the first power source and the second power source in the embodiments of the present disclosure are respectively connected to the hydraulic system through the hydraulic flow direction switching valve, and the first power source or the second power source is controlled by the hydraulic flow direction switching valve to provide power to the hydraulic system. When the electric locomotive is in the driving state, the power is provided by the first power source, and when the electric locomotive is in the upper state, the power is provided by the second power source. The embodiments of the present disclosure can effectively reduce the combustion risk of the vehicle's high-voltage battery during the pick-up operation by switching the power source.

[0043] In one embodiment of the present disclosure, the hydraulic flow direction switching valve 103 includes: a hydraulic shuttle valve or an electromagnetic reversing valve. Specifically, if the hydraulic flow direction switching valve 103 is a hydraulic shuttle valve, the oil outlet of the first hydraulic oil pump in the first power source 101 is connected to the hydraulic shuttle valve P1 interface, the oil outlet of the second hydraulic oil pump in the second power source 102 is connected to the hydraulic shuttle valve P2 interface, and the hydraulic system 104 is connected to the hydraulic shuttle valve A interface; if the hydraulic flow direction switching valve 103 is an electromagnetic reversing valve, the oil outlet of the first hydraulic oil pump in the first power source 101 is connected to the electromagnetic reversing valve A interface, the oil outlet of the second hydraulic oil pump in the second power source 102 is connected to the electromagnetic reversing valve B interface, and the hydraulic system 104 is connected to the electromagnetic reversing valve P interface, wherein the electromagnetic reversing valve needs to be controlled by the locomotive controller.

[0044] In one embodiment of the present disclosure, a hydraulic shuttle valve is a valve that automatically works by relying on a hydraulic pressure difference, and does not require an external power supply or other signal to trigger the action, which makes its operation simpler and more reliable, and provides a relatively fast response speed. At the same time, the hydraulic shuttle valve has a low cost and is relatively easy to maintain, and is suitable for application scenarios that require high working pressures; the electromagnetic reversing valve is suitable for remote control or automated control systems, and the control of flow and direction is more accurate than that of conventional hydraulic flow switching valves, and is easy to integrate into complex control systems. In addition, the electromagnetic reversing valve can also achieve a variety of additional functions such as pressure regulation. For example, in the pursuit of low cost, simplicity and reliability, a hydraulic shuttle valve can be used, and in the pursuit of high automation, precise control and support for remote operation, an electromagnetic reversing valve can be used. It should be noted that in actual situations, a hydraulic shuttle valve, an electromagnetic reversing valve or any other hydraulic flow switching valve that can meet the needs can be selected as needed, and the embodiments of the present disclosure do not specifically limit this.

[0045] Figure 2 A schematic diagram of a second power source structure is shown. Figure 2 As shown, the second power source may include: a driver 201 , an AC motor 202 and a hydraulic oil pump 203 .

[0046] In one embodiment of the present disclosure, the AC motor 202 is connected to the driver 201 and the hydraulic oil pump 203 respectively, and the AC motor 202 is controlled by the driver 201, so that the AC motor 202 drives the hydraulic oil pump 203 to provide power for the hydraulic system of the electric locomotive. Since the first hydraulic oil pump in the first power source usually adopts a fixed displacement pump, two types of working speeds, low speed or high speed, can be generally used at present, wherein the low speed can be, for example, 900rpm, and the high speed can be, for example, 1200rpm, and the switching between low speed and high speed is controlled according to the needs of the user. When using an external second power source, it is necessary to achieve the same hydraulic characteristics as the first power source, that is, when the working speed is at a low speed (for example, 900rpm), the hydraulic flow of the second power source is the same as the hydraulic flow of the first power source at the same low speed; when the working speed is at a high speed (for example, 1200rpm), the hydraulic flow of the second power source is the same as the hydraulic flow of the first power source at the same high speed. This not only simplifies the design and management of the hydraulic system, but also improves the flexibility, maintainability and economy of the system, helps the various parts of the system to work efficiently and coordinately, and improves overall efficiency.

[0047] In one embodiment of the present disclosure, Figure 3 FIG. 2 shows a schematic diagram of another second power source structure. Figure 3 As shown, the second power source may include a contactor 2011, an AC motor 202, a variable pump 2031 and a hydraulic oil pump displacement regulator 204. The hydraulic oil pump displacement regulator 204 may be used to control the hydraulic oil displacement of the variable pump 2031.

[0048] In one embodiment of the present disclosure, a contactor is generally used to control the start and stop of an electric motor; an AC motor is one of the main power sources for driving a variable pump, and by providing rotational motion to the pump shaft, the pump can suck in and compress hydraulic oil; the variable pump can change the volume of liquid discharged per revolution as needed, thereby adjusting the flow and pressure of the system to meet different working requirements, and is suitable for application scenarios that require precise control or automatic adjustment of performance according to load changes; a hydraulic oil pump displacement regulator can be used to control the output flow of the variable pump, and it changes the effective volume of the pump by adjusting the position of the internal structure of the pump.

[0049] In one embodiment of the present disclosure, the working parameters of the first power source are obtained, and the working parameters include but are not limited to flow, pressure, motor speed, etc. The contactor 2011 controls the start and stop of the AC motor 202, and selects the AC motor 202 with matching power and speed according to the working parameters of the first power source. The AC motor 202 is controlled to start by the contactor 2011, and the AC motor 202 needs to approximately reach the speed provided by the first power source. The hydraulic oil pump displacement regulator 204 is a hydraulic oil pump displacement regulator that can accurately adjust the pump displacement to ensure that a stable flow can be provided under different working conditions. The hydraulic oil pump displacement regulator 204 is driven by the AC motor 202, so that the variable pump 2031 reaches the hydraulic flow provided by the first power source according to the adjustment of the hydraulic oil pump displacement regulator 204. In actual work, according to load changes and system requirements, the setting of the displacement regulator is dynamically adjusted to adjust the pump displacement, ensure stable flow, and enable the two sets of power sources to smoothly transition and avoid sudden changes in flow caused by switching. The contactor 2011 is used to realize the constant speed operation of the AC motor 202, and the variable pump 2031 and the hydraulic oil pump displacement regulator 204 are used to control the hydraulic oil flow, so that the second power source can provide the same hydraulic flow as the first power source at the same low speed or high speed.

[0050] In one embodiment of the present disclosure, energy transfer in the related art needs to pass through more components, resulting in large energy loss. The embodiment of the present disclosure uses contactors, AC motors, variable pumps and hydraulic oil pump displacement regulators to build an efficient and responsive hydraulic system, which can not only better adapt to various working conditions, but also further simplify the power transmission link and reduce energy loss while ensuring the hydraulic working requirements.

[0051] In one embodiment of the present disclosure, Figure 4 FIG. 2 shows a schematic diagram of another second power source structure. Figure 4 As shown, the second power source may include an inverter 2012 , an AC motor 202 and a quantitative pump 2032 .

[0052] In one embodiment of the present disclosure, the frequency converter generally smoothly adjusts the speed of the AC motor by changing the power frequency supplied to the AC motor, thereby providing energy-saving effects; the AC motor, as one of the main power sources for driving the variable pump, enables the pump to suck in and compress hydraulic oil by providing rotational motion to the pump shaft; a fixed-meter pump refers to a hydraulic pump in which the volume of liquid discharged per rotation is fixed, and is suitable for working environments where frequent adjustment of flow or pressure is not required, and has a lower cost.

[0053] In one embodiment of the present disclosure, the working parameters of the first power source are obtained, and the working parameters include but are not limited to flow, pressure, motor speed, etc. The frequency converter 2012 needs to be able to accurately control the speed of the AC motor, so as to achieve fine adjustment of the flow, and select the AC motor 202 with matching power and speed according to the working parameters of the first power source. The AC motor 202 is accurately controlled by the frequency converter to reach the speed provided by the first power source, and then the quantitative pump 2032 is driven by the AC motor 202 to ensure that the same flow can be generated at the same speed. In actual work, according to load changes and system requirements, the output frequency of the frequency converter 2012 is dynamically adjusted to adjust the speed of the AC motor 202 to ensure stable flow, so that the two sets of power sources can smoothly transition and avoid sudden changes in flow caused by switching. The AC motor 202 is controlled by the frequency converter 2012 and the quantitative pump 2032, so that the second power source can provide the same hydraulic flow as the first power source at the same low speed or high speed.

[0054] In one embodiment of the present disclosure, energy transfer in the related art needs to pass through many components, resulting in large energy loss. However, the embodiment of the present disclosure can construct an economical and efficient hydraulic system through a frequency converter, an AC motor and a quantitative pump. It is suitable for scenarios where variable flow is achieved through a system with a simple structure. While ensuring the hydraulic working requirements, it can further simplify the power transmission link and reduce energy loss.

[0055] It should be noted that in actual situations, the solution of contactor, AC motor, variable pump and hydraulic oil pump displacement regulator or the solution of frequency converter, AC motor and fixed displacement pump can be selected according to needs, and the embodiments of the present disclosure do not make specific limitations on this.

[0056] In one embodiment of the present disclosure, when the second power source is connected to the electric locomotive, the electric locomotive is usually turned off, that is, the first power source (high-voltage battery) of the vehicle is disconnected, which effectively avoids the risk of high-voltage battery fire during the connection operation.

[0057] In one embodiment of the present disclosure, Figure 5 FIG. 2 shows a schematic diagram of a hybrid power control system for another electric vehicle. Figure 5 As shown, the hybrid control system may further include a locomotive controller 106. The locomotive controller 106 is often directly controlled by a user, and the user may receive signals and switch speeds through the locomotive controller 106.

[0058] In one embodiment of the present disclosure, Figure 6 FIG. 2 shows a schematic diagram of a hybrid power control system for another electric vehicle. Figure 6As shown, the hybrid control system includes: a first power source consisting of a high-voltage battery 601, a high-voltage power distribution 602, a microcontroller MCU driver 603, a main driver 604, a gearbox 605, a power take-off 606 and a first hydraulic oil pump 607, a second power source consisting of an AC socket 608, a driver 201, an AC motor 202, a hydraulic oil pump displacement regulator 204 and a second hydraulic oil pump 609, a locomotive controller 106, a hydraulic flow direction switching valve 103, a hydraulic system 104, and a lifting device 105.

[0059] In one embodiment of the present disclosure, the working process of the first power source is specifically as follows: the high-voltage battery 601 provides high-voltage direct current to the MCU driver 603 through the high-voltage distribution unit 602, and the MCU driver 603 communicates with the locomotive controller 106 through the CAN bus. The MCU driver 603 drives the main driver 604 of the electric locomotive, and the main driver 604 drives the gearbox 605. The gearbox 605 is provided with a power take-off 606, and the power take-off 606 is connected to the first hydraulic oil pump 607. The first hydraulic oil pump 607 is connected to the hydraulic system 104 through the hydraulic flow direction switching valve 103 to provide power for it, so that the hydraulic system 104 controls the lifting device 105 to perform the lifting operation.

[0060] In one embodiment of the present disclosure, the first hydraulic oil pump 607 is usually a fixed displacement pump. Currently, two types of working speeds, low speed or high speed, can be used. The low speed can be, for example, 900 rpm, and the high speed can be, for example, 1200 rpm. The switching between low speed and high speed is controlled according to the needs of the user. When using an external second power source, it is necessary to achieve the same hydraulic characteristics as the first power source, that is, when the working speed is at a low speed (for example, 900 rpm), the hydraulic flow of the second power source is the same as the hydraulic flow of the first power source at the same low speed; when the working speed is at a high speed (for example, 1200 rpm), the hydraulic flow of the second power source is the same as the hydraulic flow of the first power source at the same high speed. Low speed and high speed can be controlled by the locomotive controller 106 according to the user's operation of different hydraulic systems to control the MCU driver 603 to achieve speed switching.

[0061] In one embodiment of the present disclosure, when the electric locomotive is in a driving state, the hydraulic system does not need to work. At this time, the first power source provides power to the electric locomotive, and the power take-off 606 is disconnected from the gearbox 605. The working process is specifically as follows: the high-voltage battery 601 provides high-voltage direct current to the MCU driver 603 through the high-voltage distribution unit 602, the MCU driver 603 communicates with the locomotive controller 106 through the CAN bus, the MCU driver 603 drives the main driver 604 of the electric locomotive, the main driver 604 drives the gearbox 605, and the gearbox 605 drives the axle through the drive shaft, so that the vehicle is in a driving state.

[0062] In one embodiment of the present disclosure, the electric locomotive equipped with the above-mentioned hybrid power control system can be an electric aviation food truck. The apron is equipped with an AC380V power supply terminal, which can provide safe and reliable AC380V power to the outside. The lifting device can be used to lift the body of the electric aviation food truck so that the body can meet the target aircraft and complete the transportation and delivery of aircraft food.

[0063] In one embodiment of the present disclosure, taking the AC380V power terminal installed on the apron as an example, the working process of the second power source is specifically as follows: an AC socket 608 (for example, an AC380V AC socket) is provided on the electric locomotive. After the AC380V power supply of the apron is plugged in, the AC socket 608 will give a gun plug signal to the locomotive controller 106, and the AC power supply is connected to the driver 201. The driver 201 is connected to the AC motor 202, and the AC motor 202 drives the second hydraulic oil pump 609. The second hydraulic oil pump 609 is connected to the hydraulic system 104 through the hydraulic flow direction switching valve 103 to provide power for it, so that the hydraulic system 104 controls the lifting device 105 to perform the lifting operation.

[0064] In one embodiment of the present disclosure, when the electric locomotive is in the parking state, the locomotive controller 106 first detects a gun plug signal (for example, an AC380V gun plug signal). After detecting the gun plug signal, the locomotive controller 106 determines whether the electric locomotive is in the upper working state, that is, whether the electric locomotive is in a state where the handbrake of the chassis is pulled, the gear is in the parking gear, and the power output PTO switch is pressed; when the locomotive controller 106 detects that the electric locomotive is in the upper working state, the locomotive controller 106 detects whether the AC380V power supply is normal, whether the driver 201 is normal, and whether the switch for the user to enable the second power source is effective. After the above three devices are normal, the locomotive controller 106 controls the operation of the AC motor 202 according to the operating conditions. At the same time, during the operation, the locomotive controller 106 also needs to collect the operating current and heating status of the AC motor 202 in the second power source in real time.

[0065] In one embodiment of the present disclosure, after the electric aviation food truck docks, the second power source is preferably used to drive the hydraulic system 104 to operate. If an abnormality occurs in the second power source, the first power source is switched to drive the hydraulic system 104 to operate.

[0066] In one embodiment of the present disclosure, the electric locomotive is powered by a chassis high-voltage battery while traveling. During lifting operations, the high-voltage battery is disconnected and energy is provided by an apron power supply, thereby effectively avoiding the risk of high-voltage battery catching fire during aircraft reception operations, reducing power transmission links, and improving work efficiency.

[0067] In one embodiment of the present disclosure, Figure 7FIG. 1 is a flow chart showing a hybrid power control method for an electric locomotive. Figure 7 As shown, the method comprises the following steps:

[0068] S702, monitoring the working status of the electric locomotive.

[0069] S704, if the electric locomotive is in a driving state, control the first power source to provide power to the electric locomotive, wherein the first power source is a power source inside the electric locomotive.

[0070] S706, if the electric locomotive is in the loading state, control the second power source to provide power to the electric locomotive, wherein the loading state is the working state of controlling the operation of the lifting device on the electric locomotive when the electric locomotive is parked, and the second power source is a power source external to the electric locomotive.

[0071] As can be seen from the above, the disclosed embodiment monitors the working state of the electric locomotive and selects different power sources to provide power to the electric locomotive when the electric locomotive is in different working states, so that the electric locomotive is powered by the internal high-voltage battery during driving and by the external power supply during loading. The disclosed embodiment can effectively reduce the risk of combustion of the vehicle's high-voltage battery during the pickup operation by switching the power source.

[0072] In one embodiment of the present disclosure, taking the AC380V power supply terminal installed on the apron as an example, Figure 8 A flow chart of a control method for enabling a second power source of an electric locomotive is shown. Figure 8 As shown, the method includes:

[0073] S801, monitoring locomotive status information of the electric locomotive through a locomotive controller.

[0074] S802, determine whether the electric locomotive is in a normal operating state. If yes, execute S803; if no, execute S801.

[0075] Specifically, the above S802 may include:

[0076] S8021, determine whether the locomotive controller detects the AC380V gun plug signal.

[0077] S8022, determine whether the electric locomotive is in the loading state.

[0078] S8023, determine whether the operating status of the AC380V power supply detected by the locomotive controller is normal.

[0079] S8024, determining whether the operating status of the driver detected by the locomotive controller is normal.

[0080] S8025, determining whether the start switch of the second power source detected by the locomotive controller is valid.

[0081] It should be noted that when any one of the above S8021 to S8025 is a negative situation, S801 is executed, and when each of the above S8021 to S8025 is a positive situation, S803 is executed.

[0082] S803, controlling the operation of the AC motor of the electric locomotive according to the operating conditions through the locomotive controller.

[0083] S804, collecting the running current and heating status of the AC motor in real time through the locomotive controller.

[0084] As can be seen from the above, the disclosed embodiment monitors the working state of the electric locomotive and selects an external power source to provide power to it when multiple preset conditions are met, so that the electric locomotive is powered by an external power source during the loading process without the need for an internal power supply of the electric locomotive. The disclosed embodiment can effectively reduce the risk of combustion of the vehicle's high-voltage battery during the pickup operation by switching the power source.

[0085] In one embodiment of the present disclosure, after the above S706, the method further includes: monitoring the operating status information of the second power source; when the operating status of the second power source is abnormal, controlling the first power source to replace the second power source to provide power to the electric locomotive.

[0086] Based on the same inventive concept, the present disclosure also provides a hybrid power control device for an electric locomotive, as described in the following embodiments. Since the principle of solving the problem in the device embodiment is similar to that in the above method embodiment, the implementation of the device embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.

[0087] In one embodiment of the present disclosure, Fig. 9 A schematic diagram of a hybrid power control device for an electric vehicle is shown. The device comprises: a working state detection module 901 , a first power source determination module 902 and a second power source determination module 903 .

[0088] Among them, the working status detection module 901 is used to monitor the working status of the electric locomotive; the first power source determination module 902 is used to control the first power source to provide power to the electric locomotive if the electric locomotive is in a driving state, wherein the first power source is the power source inside the electric locomotive; the second power source determination module 903 is used to control the second power source to provide power to the electric locomotive if the electric locomotive is in a loading state, wherein the loading state is the working state of the electric locomotive controlling the operation of the lifting device on the electric locomotive when the electric locomotive is in a parking state, and the second power source is a power source external to the electric locomotive.

[0089] As can be seen from the above, the disclosed embodiment monitors the working state of the electric locomotive and selects different power sources to provide power to the electric locomotive when the electric locomotive is in different working states, so that the electric locomotive is powered by the internal high-voltage battery during driving and by the external power supply during loading. The disclosed embodiment can effectively reduce the risk of combustion of the vehicle's high-voltage battery during the pickup operation by switching the power source.

[0090] In one embodiment of the present disclosure, the device also includes: a power source replacement module 904, which is used to monitor the operating status information of the second power source; when the operating status of the second power source is abnormal, the first power source is controlled to replace the second power source to provide power to the electric locomotive.

[0091] Those skilled in the art will appreciate that various aspects of the present disclosure may be implemented as systems, methods or program products. Therefore, various aspects of the present disclosure may be specifically implemented in the following forms, namely: complete hardware implementation, complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to herein as "circuits", "modules" or "systems".

[0092] Refer to the following Fig.10 The electronic device 1000 according to this embodiment of the present disclosure is described. Fig.10 The electronic device 1000 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0093] Fig.10 A block diagram of an electronic device in an embodiment of the present disclosure is shown. Fig.10 The electronic device 1000 according to this embodiment of the present disclosure is described. Fig.10 The electronic device 1000 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0094] like Fig.10 As shown, the electronic device 1000 is in the form of a general computing device. The components of the electronic device 1000 may include but are not limited to: the at least one processing unit 1010, the at least one storage unit 1020, and a bus 1030 connecting different system components (including the storage unit 1020 and the processing unit 1010).

[0095] The storage unit stores a program code, and the program code can be executed by the processing unit 1010, so that the processing unit 1010 executes the steps described in the above "Exemplary Method" section of this specification according to various exemplary embodiments of the present disclosure. For example, the processing unit 1010 can execute the following steps of the above method embodiment: monitoring the working state of the electric locomotive; if the electric locomotive is in a driving state, controlling the first power source to provide power to the electric locomotive, wherein the first power source is a power source inside the electric locomotive; if the electric locomotive is in a loading state, controlling the second power source to provide power to the electric locomotive, wherein the loading state is a working state of the electric locomotive controlling the operation of the lifting device on the electric locomotive when the electric locomotive is in a parking state, and the second power source is a power source external to the electric locomotive.

[0096] The storage unit 1020 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 10201 and / or a cache storage unit 10202 , and may further include a read-only storage unit (ROM) 10203 .

[0097] The storage unit 1020 may also include a program / utility 10204 having a set (at least one) of program modules 10205, such program modules 10205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0098] Bus 1030 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0099] The electronic device 1000 may also communicate with one or more external devices 1040 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 1000, and / or communicate with any device that enables the electronic device 1000 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 1050. Furthermore, the electronic device 1000 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 1060. As shown, the network adapter 1060 communicates with other modules of the electronic device 1000 via a bus 1030. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 1000, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0100] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0101] Based on the same inventive concept, the embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, any of the above-mentioned hybrid power control methods for electric locomotives is implemented. Since the implementation of the computer-readable storage medium embodiment can refer to the implementation of the above-mentioned method embodiment, the repeated parts will not be repeated.

[0102] More specific examples of computer-readable storage media in the present disclosure may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0103] In the present disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, wherein a readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A readable signal medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0104] Alternatively, the program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0105] In a specific implementation, the program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0106] Based on the same inventive concept, a computer program product is also provided in the embodiment of the present disclosure, including: a computer program or an instruction, which implements the hybrid power control method of an electric locomotive in any one of the above method embodiments when the computer program or the instruction is executed by a processor. Since the principle of solving the problem in the computer program product embodiment is similar to that in the above method embodiment, the implementation of the computer program product embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.

[0107] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0108] In addition, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0109] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0110] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A hybrid power control system for an electric locomotive, characterized in that: The electric locomotive is provided with a lifting device for performing a lifting action and a hydraulic system for driving the lifting device to perform the lifting action, the hydraulic system is powered by a first power source or a second power source, the first power source is a power source inside the electric locomotive, and the second power source is a power source external to the electric locomotive; the system comprises: The first power source, the second power source, the hydraulic flow direction switching valve and the hydraulic system, wherein the first power source and the second power source are connected to the hydraulic system through the hydraulic flow direction switching valve respectively, and the hydraulic flow direction switching valve is used to control the first power source or the second power source to provide power to the hydraulic system; The first power source is used to provide power when the electric locomotive is in a driving state; The second power source is used to provide power when the electric locomotive is in a loading state, wherein the loading state is a working state in which the electric locomotive controls the operation of the lifting device when the electric locomotive is in a parking state.

2. The hybrid power control system of an electric locomotive according to claim 1, characterized in that: The hydraulic flow direction switching valve includes: a hydraulic shuttle valve or an electromagnetic reversing valve.

3. The hybrid power control system of an electric locomotive according to claim 1, characterized in that: The second power source includes: a driver, an AC motor and a hydraulic oil pump, wherein the AC motor is connected to the driver and the hydraulic oil pump respectively, and the AC motor is controlled by the driver so that the AC motor drives the hydraulic oil pump to provide power for the hydraulic system of the electric locomotive.

4. The hybrid power control system of an electric locomotive according to claim 3, characterized in that: The driver is a contactor, and the hydraulic oil pump is a variable pump, wherein the variable pump is also provided with a hydraulic oil pump displacement regulator for controlling the hydraulic oil displacement of the variable pump.

5. The hybrid power control system of an electric locomotive according to claim 3, characterized in that: The driver is a frequency converter, and the hydraulic oil pump is a quantitative pump.

6. The hybrid power control system of an electric locomotive according to claim 1, characterized in that: The system further includes: a locomotive controller; The locomotive controller is connected to the first power source and the second power source respectively, and is used to monitor the operating status information of the second power source so that when the operating status of the second power source becomes abnormal, the first power source is controlled to replace the second power source to provide power to the hydraulic system of the electric locomotive.

7. The hybrid power control system of an electric locomotive according to claim 1, characterized in that: The electric locomotive is an electric aviation catering vehicle, and the lifting device is used to lift the body of the electric aviation catering vehicle so that the body can meet the target aircraft.

8. A hybrid power control method for an electric locomotive, characterized in that: include: Monitor the working status of electric locomotives; If the electric locomotive is in a driving state, controlling a first power source to provide power to the electric locomotive, wherein the first power source is a power source inside the electric locomotive; If the electric locomotive is in the loading state, the second power source is controlled to provide power to the electric locomotive, wherein the loading state is the working state of controlling the operation of the lifting device on the electric locomotive when the electric locomotive is parked, and the second power source is a power source external to the electric locomotive.

9. The hybrid power control method of an electric locomotive according to claim 8, characterized in that: If the electric locomotive is in the loading state, after providing power to the electric locomotive through the second power source, the method further includes: Monitoring the operating status information of the second power source; When an abnormality occurs in the operating state of the second power source, the first power source is controlled to replace the second power source to provide power to the electric locomotive.

10. A hybrid power control device for an electric locomotive, characterized in that: include: A working status detection module is used to monitor the working status of the electric locomotive; a first power source determination module, configured to control a first power source to provide power to the electric locomotive if the electric locomotive is in a driving state, wherein the first power source is a power source inside the electric locomotive; The second power source determination module is used to control the second power source to provide power to the electric locomotive if the electric locomotive is in a loading state, wherein the loading state is a working state in which the electric locomotive controls the operation of the lifting device on the electric locomotive when the electric locomotive is parked, and the second power source is a power source external to the electric locomotive.

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