Charging isolation device of hydrogen fuel cell hybrid power locomotive

Abstract

The invention provides a hydrogen fuel cell hybrid power locomotive charging isolation device, and relates to the technical field of new energy automobile charging devices. The hydrogen fuel cell hybrid power locomotive charging isolation device comprises a power supply module, a control conversion module, a fault detection module, a transformer and a vehicle battery system, the power supply module outputs alternating current and provides electric power needed by charging to the control conversion module, the output end of the power supply module is connected with a locomotive charging interface through a charging wire, and the fault detection module is connected with the transformer. The output end of the locomotive charging port is connected with the input end of the control conversion module, and the control conversion module converts alternating current into direct current suitable for charging. The normal state and the redundant state of the system are monitored through the two safety relays respectively, when one relay detects a fault, the other relay can still keep operating, it is ensured that the power supply is not powered off, and therefore it is ensured that the system can continue to run safely when the fault occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging devices, and in particular to a charging isolation device for a hydrogen fuel cell hybrid locomotive. Background Art

[0002] A hydrogen fuel cell hybrid locomotive is a green means of transportation that uses hydrogen as its main fuel and combines it with battery energy storage technology. The locomotive converts hydrogen and oxygen into electrical energy through a fuel cell to drive the motor, and uses the battery for energy recovery during braking or low-speed driving to improve overall energy efficiency. The charging isolation device is a key safety component in a hydrogen fuel cell hybrid locomotive, responsible for achieving electrical isolation and fault protection during the charging process.

[0003] Many traditional power management systems in the current existing technology will cause the entire power supply to be cut off when a fault occurs, causing the system to be unable to continue operating, affecting safety and efficiency. In traditional systems, the power supply often needs to be manually reset after the fault is repaired, which increases the complexity of operation and recovery time. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a charging isolation device for a hydrogen fuel cell hybrid locomotive, which solves the problem that power outages are easily caused when a power management system fails.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hydrogen fuel cell hybrid locomotive charging isolation device, comprising a power module, a control conversion module, a fault detection module, a transformer and a vehicle battery system, the power module outputs alternating current, provides the power required for charging and is connected to the control conversion module, the output end of the power module is connected to the locomotive charging interface through a charging line, the output end of the locomotive charging port is connected to the input end of the control conversion module, the control conversion module converts alternating current into direct current suitable for charging, the output end of the control conversion module is connected to the input end of the fault detection module, the fault detection module monitors the system status in real time, the fault detection module includes multiple current, voltage, temperature sensors and monitoring systems and two safety relays, the output end of the fault detection module is feedback connected to the input end of the control conversion module, the transformer receives the direct current from the control conversion module for conversion, and the output end of the transformer outputs power suitable for the vehicle battery system, the vehicle battery system is used to store and release electrical energy to supply power to the electric vehicle.

[0006] Preferably, the power module includes an AC power supply and a charging pile, the AC power supply is connected to the input end of the charging pile through an AC cable of a dedicated power grid, and the charging pile is physically plugged and unplugged with the charging port of the hydrogen fuel cell hybrid locomotive through a transmission line and a charging plug.

[0007] Preferably, the control conversion module includes an AC / DC converter, a charging control module and a display interface, and the locomotive charging interface directly connects the power supply to the control conversion module inside the locomotive through a dedicated high-current carrying capacity cable.

[0008] Preferably, the AC / DC converter is used to convert alternating current into direct current to meet the charging needs of the battery. The output end of the AC / DC converter is connected to the input end of the charging control module. The charging control module is used to adjust the charging current, charging time and other control logic. The charging control module displays the charging status, progress and possible error information to the user through a display interface.

[0009] Preferably, the monitoring system of the fault detection module includes a main control chip, an automatic restart control logic and a relay restart module. The main control chip receives status and feedback information from each module, and can send instructions to other parts of the system for adjustment based on this information. Each sensor, automatic restart control logic and relay restart module will feed back the obtained information to the main control chip. The main control chip sends the fault status and monitoring results to the automatic restart control logic through digital signals or analog signals. The automatic restart control logic determines whether a fault occurs and decides whether the system needs to be restarted based on the monitoring information from the fault detection module. The automatic restart control logic transmits the information to the relay restart module to control the opening and closing of the relay, thereby restoring the power supply to the power supply. Two safety relays provide redundant protection. Safety relays A and B respectively monitor the normal and redundant states of the system. Once one part fails, the other part ensures that the system can still operate safely and charge while ensuring safety.

[0010] Preferably, the output end of the main control chip will feed back the detected information to the control conversion module, and display it through the display interface to remind the owner of the specific fault information of the vehicle charging, so as to quickly find the charging problem.

[0011] Preferably, when the fault detection module detects that various charging indicators are safe, it will convert the direct current transmitted by the fault detection module. The transformer is used for voltage conversion, current regulation, electrical safety isolation and signal transmission to ensure effective management and operational safety during battery charging.

[0012] Preferably, the vehicle battery system includes a hydrogen fuel cell and a battery management system. After receiving suitable electricity, the vehicle battery system supplies power to other loads. The hydrogen fuel cell converts hydrogen fuel into electrical energy to provide power support. The battery management system monitors and manages the status and health of the battery to ensure safe use. The output end of the battery management system is connected to the input end of the energy management unit. The energy management unit coordinates the energy output of the hydrogen fuel cell and the battery to optimize energy utilization efficiency.

[0013] The present invention provides a charging isolation device for a hydrogen fuel cell hybrid locomotive. It has the following beneficial effects: 1. The present invention uses two safety relays to monitor the normal state and redundant state of the system respectively. When one relay detects a fault, the other relay can still keep operating to ensure that the power supply is not cut off, thereby ensuring that the system can continue to operate safely when a fault occurs.

[0014] 2. The present invention realizes double isolation of the circuit through two relays, ensuring that the power supply is enabled only under safe conditions, thereby avoiding the risks caused by accidental operation during maintenance or charging.

[0015] 3. When the fault is repaired, the system can automatically restore power supply through the fault detection module and the automatic restart control logic reset relay, which greatly improves the convenience of operation and the availability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the charging process of the present invention; Figure 2 It is a schematic diagram of the fault detection process of the present invention; Figure 3 It is a schematic diagram of the charging component of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] Example: like Figure 1-3As shown, an embodiment of the present invention provides a charging isolation device for a hydrogen fuel cell hybrid locomotive, comprising a power module, a control conversion module, a fault detection module, a transformer and a vehicle battery system. The power module outputs alternating current, provides the power required for charging and is connected to the control conversion module. The output end of the power module is connected to the locomotive charging interface through a charging line, and the output end of the locomotive charging port is connected to the input end of the control conversion module. The control conversion module converts the alternating current into direct current suitable for charging. The output end of the control conversion module is connected to the input end of the fault detection module. The fault detection module monitors the system status in real time. The fault detection module includes multiple current, voltage, and temperature sensors and a monitoring system and two safety relays. The output end of the fault detection module is feedback-connected to the input end of the control conversion module. The transformer receives the direct current from the control conversion module for conversion. The output end of the transformer outputs power suitable for the vehicle battery system. The vehicle battery system is used to store and release electrical energy to supply power to the electric vehicle. Specifically, the power module is a built-in structure of the charging pile. The control conversion module, fault detection module, transformer and vehicle battery system are all internal components of the hydrogen fuel cell hybrid locomotive. The transformer is selected from Triad Magnetics F-090, which is suitable for a variety of power applications and can withstand high short-circuit currents to ensure safety in fault conditions. Both safety relays are selected from Siemens' 3RT2022-1B, which has strong resistance to high voltage and pressure shock, high safety and rapid response. During the fault detection process, once an abnormality is found, the fault detection module will immediately feedback the request to the control conversion module and quickly cut off the power supply to protect the equipment.

[0019] The power module includes an AC power supply and a charging pile. The AC power supply is connected to the input end of the charging pile through an AC cable of a dedicated power grid. The charging pile is physically connected to the charging port of the hydrogen fuel cell hybrid locomotive through a transmission line and a charging plug. Specifically, the charging piles are all independently set up and separated from other surrounding charging piles, ensuring that one car has one pile during charging, ensuring the independence of charging of hydrogen fuel cell hybrid locomotives, thereby improving charging safety.

[0020] The control conversion module includes an AC / DC converter, a charging control module and a display interface. The locomotive charging interface directly connects the power supply to the control conversion module inside the locomotive through a dedicated high-current carrying capacity cable. The AC / DC converter is used to convert alternating current into direct current to meet the charging needs of the battery. The output end of the AC / DC converter is connected to the input end of the charging control module. The charging control module is used to adjust the charging current, charging time and other control logic. The charging control module displays the charging status, progress and possible error information to the user through the display interface; Specifically, the AC / DC converter selected is Mean Well's LRS-350-48, which has high charging efficiency and good heat dissipation, and can handle different input voltage requirements. The display interface may also provide operating instructions and troubleshooting suggestions to help users quickly solve problems and improve charging convenience. The system can automatically cut off the power supply and prompt the user with fault information, and provide real-time feedback on the charging current and remaining time of the charging status to help users understand the progress.

[0021] The monitoring system of the fault detection module includes a main control chip, an automatic restart control logic and a relay restart module. The main control chip receives status and feedback information from each module, and can send instructions to other parts of the system for adjustment based on this information. Each sensor, automatic restart control logic and relay restart module will feed back the obtained information to the main control chip. The main control chip sends the fault status and monitoring results to the automatic restart control logic through digital signals or analog signals. The automatic restart control logic determines whether a fault occurs and decides whether the system needs to be restarted based on the monitoring information from the fault detection module. The automatic restart control logic transmits the information to the relay restart module to control the opening and closing of the relay, thereby restoring the power supply to the power supply. Two safety relays provide redundant protection. Safety relays A and B monitor the normal and redundant status of the system respectively. Once a part fails, the other part ensures that the system can still operate safely and charge while ensuring safety. The output end of the main control chip will feed back the detected information to the control conversion module and display it through the display interface to remind the owner of the specific fault information of the vehicle charging, which is used to quickly find the charging problem. Specifically, the setting of two safety relays extends the service life of the equipment and improves the overall charging efficiency.

[0022] When the fault detection module detects that the charging indicators are safe, it will convert the DC power transmitted by the fault detection module. The transformer is used for voltage conversion, current regulation, electrical safety isolation and signal transmission to ensure effective management and operational safety during battery charging. Based on the information received, the main control chip can adjust various parts of the system in real time and send instructions for adjustments, thereby improving the reliability of the system.

[0023] The vehicle battery system includes a hydrogen fuel cell and a battery management system. After receiving suitable electricity, the vehicle battery system supplies power to other loads. The hydrogen fuel cell converts hydrogen fuel into electrical energy to provide power support. The battery management system monitors and manages the status and health of the battery to ensure safe use. The output of the battery management system is connected to the input of the energy management unit. The energy management unit coordinates the energy output of the hydrogen fuel cell and battery to optimize energy utilization efficiency.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A charging isolation device for a hydrogen fuel cell hybrid locomotive, characterized in that: include: A power supply module, a control conversion module, a fault detection module, a transformer and a vehicle battery system. The power supply module outputs AC power to provide the power required for charging and is connected to the control conversion module. The output end of the power supply module is connected to the locomotive charging interface through a charging line, and the output end of the locomotive charging port is connected to the input end of the control conversion module. The control conversion module converts AC power into DC power suitable for charging. The output end of the control conversion module is connected to the input end of the fault detection module. The fault detection module monitors the system status in real time. The fault detection module includes multiple current, voltage, temperature sensors and monitoring systems and two safety relays. The output end of the fault detection module is feedback connected to the input end of the control conversion module. The transformer receives DC power from the control conversion module for conversion. The output end of the transformer outputs power suitable for the vehicle battery system. The vehicle battery system is used to store and release electrical energy to supply power to the electric vehicle.

2. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 1, characterized in that: The power module includes an AC power supply and a charging pile. The AC power supply is connected to the input end of the charging pile through an AC cable of a dedicated power grid. The charging pile is physically plugged and unplugged with the charging port of the hydrogen fuel cell hybrid locomotive through a transmission line and a charging plug.

3. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 1, characterized in that: The control conversion module includes an AC / DC converter, a charging control module and a display interface, and the locomotive charging interface directly connects the power supply to the control conversion module inside the locomotive through a dedicated high-current carrying capacity cable.

4. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 3, characterized in that: The AC / DC converter is used to convert alternating current into direct current to meet the charging needs of the battery. The output end of the AC / DC converter is connected to the input end of the charging control module. The charging control module is used to adjust the charging current, charging time and other control logic. The charging control module displays the charging status, progress and possible error information to the user through a display interface.

5. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 1, characterized in that: The monitoring system of the fault detection module includes a main control chip, an automatic restart control logic and a relay restart module. The main control chip receives status and feedback information from each module, and can send instructions to other parts of the system for adjustment based on this information. Each sensor, automatic restart control logic and relay restart module will feed back the obtained information to the main control chip. The main control chip sends the fault status and monitoring results to the automatic restart control logic through digital signals or analog signals. The automatic restart control logic determines whether a fault occurs and decides whether the system needs to be restarted based on the monitoring information from the fault detection module. The automatic restart control logic transmits the information to the relay restart module to control the opening and closing of the relay, thereby restoring the power supply to the power supply. Two safety relays provide redundant protection. Safety relays A and B monitor the normal and redundant states of the system respectively. Once one part fails, the other part ensures that the system can still operate safely and charge while ensuring safety.

6. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 5, characterized in that: The output end of the main control chip will feed back the detected information to the control conversion module, and display it through the display interface to remind the owner of the specific fault information of the vehicle charging, so as to quickly find the charging problem.

7. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 1, characterized in that: When the fault detection module detects that various charging indicators are safe, it will convert the direct current transmitted by the fault detection module. The transformer is used for voltage conversion, current regulation, electrical safety isolation and signal transmission to ensure effective management and operational safety during battery charging.

8. A hydrogen fuel cell hybrid locomotive charging isolation device according to claim 1, characterized in that: The vehicle battery system includes a hydrogen fuel cell and a battery management system. After receiving suitable electricity, the vehicle battery system supplies power to other loads. The hydrogen fuel cell converts hydrogen fuel into electrical energy to provide power support. The battery management system monitors and manages the status and health of the battery to ensure safe use. The output end of the battery management system is connected to the input end of the energy management unit. The energy management unit coordinates the energy output of the hydrogen fuel cell and the battery to optimize energy utilization efficiency.

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