A method of safely hydrogenating a number rail vehicle

Abstract

The application discloses a kind of number rail vehicle safety hydrogenation methods, belong to vehicle hydrogen storage technical field, the present application is activated and hydrogenation door plate by safety operation key interlock vehicle, and by setting travel switch and hydrogen concentration sensor on hydrogenation door plate is used for real-time monitoring hydrogenation door plate state and hydrogen concentration overproof condition, prevent abnormal operation hydrogenation or hydrogen concentration overproof exception, driver operation has certain standardization function, after vehicle activation, if hydrogenation exception can automatically cut off hydrogen power system, provide great security guarantee.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage technology for vehicles, and in particular to a safe hydrogen refueling method for multi-rail vehicles. Background Technology

[0002] Steel-wheeled and steel-rail trams have undergone over 100 years of development, with vehicle technology updated multiple times. Currently, they possess mature technologies such as multi-module articulation, 100% low-floor operation, and contactless power supply, capable of meeting the transportation needs of medium- and low-capacity urban rail transit. However, in recent years, the development of steel-wheeled and steel-rail trams in China has encountered bottlenecks. Compared to conventional BRT systems, while they offer advantages such as larger passenger capacity and higher comfort, they suffer from disadvantages such as higher construction costs and longer construction periods, making them difficult to adapt to the current needs of urban public transportation construction in China. Therefore, combining the characteristics of steel-wheeled and steel-rail trams and rubber-tired BRT vehicles, the newly developed vehicle adopts rubber-tired operation (no steel rails), low floor, and hydrogen energy supply (no overhead contact line), replacing the traditional overhead contact line or pure energy storage power supply method. However, the existing hydrogen refueling method cannot ensure safety for multi-rail vehicles, especially since it is necessary to ensure that the vehicle is in a suitable condition before refueling and to confirm that the hydrogen refueling is normal before driving away. Since hydrogen is flammable and explosive, the safety hazards are significant. Therefore, a safe hydrogen refueling method suitable for multi-rail vehicles is designed. Summary of the Invention

[0003] This invention provides a safe hydrogen refueling method for digital rail vehicles, which can solve at least one of the problems mentioned in the background art.

[0004] A method for safe hydrogen refueling of a digital rail vehicle, the digital rail vehicle being equipped with an energy storage battery, a hydrogen power system, a network input / output unit, a network display screen (driver monitoring screen), a hydrogen concentration sensor, limit switches, a vehicle power mode switch, a vehicle activation switch, a hydrogen refueling cover, and an interlock key, including:

[0005] Before refueling with hydrogen, monitor the following vehicle conditions:

[0006] Vehicle power mode switch status, energy storage battery connection status, vehicle activation switch status, and interlock key status;

[0007] If at least one vehicle condition is detected as not meeting the hydrogen refueling requirements, the hydrogen refueling panel lock will be locked. When all of the above vehicle conditions are detected as meeting the hydrogen refueling requirements, the hydrogen refueling panel lock will switch from the locked state to the unlocked state, and hydrogen refueling can be performed by opening the hydrogen refueling panel lock with the interlock key.

[0008] After hydrogen refueling, the following vehicle statuses will be monitored:

[0009] Hydrogen refueling panel status, vehicle activation switch status, and hydrogen concentration status;

[0010] When the vehicle is activated, if at least one of the vehicle statuses, namely the hydrogen refueling panel status and the hydrogen concentration status, is detected as not meeting the start-up requirements, an alarm will be issued to the driver until the hydrogen refueling panel status and the hydrogen concentration status meet the requirements.

[0011] Both the hydrogen refueling cover lock and the vehicle activation switch lock installed in the driver's cab are restricted by interlocking keys, and only one key is allowed to be placed in the vehicle. Only one key is allowed to be unlocked at the same time. When the vehicle is awakened, the limit switch is monitored by the network. When the hydrogen refueling cover is not locked in place, the monitoring screen installed in the driver's cab displays a warning message and beeps to remind the driver.

[0012] The monitoring method for the status of the hydrogenation panel is as follows:

[0013] The limit switch is located inside the hydrogen refueling panel. The limit switch is used to monitor the position of the hydrogen refueling panel to determine whether the hydrogen refueling panel is closed. When the vehicle is in an active state, if the limit switch indicates that the hydrogen refueling panel is not closed, the vehicle network unit will alert the driver through the warning unit; otherwise, no alarm will be triggered.

[0014] The methods for monitoring hydrogen concentration are as follows:

[0015] The hydrogen concentration sensor is located inside the hydrogen refueling panel. When the vehicle is in the active state, if the limit switch indicates an abnormal hydrogen concentration, the vehicle network unit will alert the driver through the warning unit; otherwise, no alarm will be triggered.

[0016] The hydrogen refueling panel has two redundant limit switches.

[0017] A vehicle that meets the requirements for hydrogen refueling must be in the following states: the vehicle power mode switch is in the "electric" position, the energy storage battery is in the off state, the vehicle activation switch is in the off state, and the interlock key is in the state where the vehicle activation switch is not inserted.

[0018] When the vehicle network unit receives an abnormal concentration information from the hydrogen concentration sensor and determines the vehicle's power mode, if the vehicle power module is in the "electric" position, the vehicle network unit sends a cut-off signal to the vehicle control system. The vehicle control system then cuts off the hydrogen power system and alerts the driver through the warning unit. Otherwise, it only alerts the driver through the warning unit.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention interlocks the vehicle activation and hydrogen refueling door panel through a safe operation key, and uses a limit switch and a hydrogen concentration sensor on the hydrogen refueling door panel to monitor the status of the hydrogen refueling door panel and the hydrogen concentration exceeding the standard in real time, preventing abnormal operation of hydrogen refueling or abnormal hydrogen concentration exceeding the standard, which has a certain standardizing effect on driver operation. If the hydrogen refueling is abnormal after the vehicle is activated, the hydrogen power system can be automatically cut off, providing a great safety guarantee. Attached Figure Description

[0020] Figure 1 This is a flowchart of the safe hydrogenation method of the present invention;

[0021] Figure 2 This is a schematic diagram of the monitoring principle of the hydrogenation cover plate of the present invention. Detailed Implementation

[0022] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0023] like Figures 1 to 2 As shown in the figure, an embodiment of the present invention provides a safe hydrogen refueling method for digital rail vehicles, comprising:

[0024] Before refueling with hydrogen, monitor the following vehicle conditions:

[0025] Vehicle power mode switch status, energy storage battery connection status, vehicle activation switch status, and interlock key status;

[0026] The monitoring scheme is as follows: The monitoring system monitors the vehicle's power mode switch, energy storage battery connection status, vehicle activation switch status, and interlock key status through circuit monitoring or position sensors. The vehicle power mode switch has an electric position and a hybrid position. When refueling with hydrogen, the vehicle power mode switch needs to be set to the electric position. When the monitoring system detects that the vehicle power mode switch is set to the electric position, it determines that the vehicle meets the requirements for hydrogen refueling; otherwise, it does not. When refueling with hydrogen, the energy storage battery needs to be disconnected. If the monitoring system detects that the energy storage battery is disconnected, it determines that the vehicle meets the requirements for hydrogen refueling; otherwise, it does not. The vehicle activation switch has two positions, "1" and "0," corresponding to activation and dormancy, respectively. When refueling with hydrogen, the energy storage battery needs to be disconnected. If the monitoring system detects that the energy storage battery is disconnected, it determines that the vehicle meets the requirements for hydrogen refueling; otherwise, it does not. When refueling with hydrogen, because the hydrogen refueling panel lock needs to be opened, it is necessary to monitor whether the interlock key has been removed. If the monitoring system detects that the interlock key has been removed, the result is that the vehicle meets the requirements for hydrogen refueling; otherwise, it does not.

[0027] If at least one vehicle condition is detected as not meeting the hydrogen refueling requirements, the hydrogen refueling panel lock will be locked. In addition to being secured by the hydrogen refueling panel lock, the hydrogen refueling panel is also secured by a mechanical lock controlled by a relay. After the monitoring system detects that all vehicle conditions meet the requirements, it can control the mechanical lock to open via the relay. Then, the operator can open the hydrogen refueling panel lock using the interlock key, thereby opening the hydrogen refueling panel. That is, when all the above vehicle conditions are detected as meeting the hydrogen refueling requirements, the hydrogen refueling panel lock switches from the locked state to the openable state, and the hydrogen refueling panel lock can be opened using the interlock key to refuel.

[0028] If the monitoring system detects that at least one vehicle does not meet the requirements, it will alert the driver and hydrogen refueling personnel through the warning unit, which may include a buzzer, alarm light, network display screen, etc.

[0029] After hydrogen refueling, the following vehicle statuses will be monitored:

[0030] Hydrogen refueling panel status, vehicle activation switch status, and hydrogen concentration status;

[0031] When the vehicle is activated, if at least one of the vehicle statuses, namely the hydrogen refueling panel status and the hydrogen concentration status, is detected as not meeting the startup requirements, an alarm will be issued to the driver until the hydrogen refueling panel status and the hydrogen concentration status meet the requirements.

[0032] The monitoring method for the above-mentioned hydrogenation panel status is as follows:

[0033] The limit switch is located inside the hydrogen refueling panel. This limit switch monitors the panel's position to determine if it is closed. When the vehicle is active, if the limit switch indicates the panel is not closed, the vehicle network unit alerts the driver via a warning unit; otherwise, no alert is issued. Figure 2 As shown, S1 and S2 are limit switches, and CB is the circuit breaker for the switch monitoring circuit.

[0034] The methods for monitoring the hydrogen concentration mentioned above are as follows:

[0035] The hydrogen concentration sensor is installed inside the hydrogen refueling panel. When the vehicle is in the active state, if the limit switch indicates an abnormal hydrogen concentration, the vehicle network unit will alert the driver through the warning unit; otherwise, no alarm will be triggered.

[0036] If at least one abnormality is found in the hydrogen refueling panel or hydrogen concentration, the driver will receive an alarm and switch the vehicle activation switch to "0" to put the vehicle into sleep mode. Then, the driver should get out of the vehicle to troubleshoot the problem. After troubleshooting, the driver should switch the vehicle activation switch back to "1" to activate the vehicle. Once there are no abnormalities, the driver can leave the hydrogen refueling station normally.

[0037] The hydrogen concentration sensor and limit switch are connected to the vehicle network unit. The vehicle network unit can obtain the values ​​measured by the hydrogen concentration sensor and limit switch and compare them with the preset values ​​to determine whether they are qualified.

[0038] In addition, two limit switches are redundantly installed in the hydrogenation panel to improve accuracy;

[0039] A vehicle that meets the requirements for hydrogen refueling must be in the following states: the vehicle power mode switch is in the "electric" position, the energy storage battery is in the off state, the vehicle activation switch is in the off state, and the interlock key is in the state where the vehicle activation switch is not inserted.

[0040] When the vehicle network unit receives an abnormal concentration information from the hydrogen concentration sensor and determines the vehicle's power mode, if the vehicle power module is in the "electric" position, the vehicle network unit sends a cut-off signal to the vehicle control system. The vehicle control system then cuts off the hydrogen power system and alerts the driver through the warning unit. Otherwise, it only alerts the driver through the warning unit.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit and essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for safe hydrogen refueling of multi-rail vehicles, characterized in that, include: Before refueling with hydrogen, monitor the following vehicle conditions: Vehicle power mode switch status, energy storage battery connection status, vehicle activation switch status, and interlock key status; If at least one vehicle condition is detected as not meeting the hydrogen refueling requirements, the hydrogen refueling panel lock will be locked. When all of the above vehicle conditions are detected as meeting the hydrogen refueling requirements, the hydrogen refueling panel lock will switch from the locked state to the unlocked state, and hydrogen refueling can be performed by opening the hydrogen refueling panel lock with the interlock key. After hydrogen refueling, the following vehicle statuses will be monitored: Hydrogen refueling panel status, vehicle activation switch status, and hydrogen concentration status; When the vehicle is activated, if at least one of the vehicle statuses, namely the hydrogen refueling panel status and the hydrogen concentration status, is detected as not meeting the startup requirements, an alarm will be issued to the driver until the hydrogen refueling panel status and the hydrogen concentration status meet the requirements.

2. The method for safe hydrogen refueling of a multi-track vehicle as described in claim 1, characterized in that, The method for monitoring the status of the hydrogenation panel is as follows: The limit switch is located inside the hydrogen refueling panel. The limit switch is used to monitor the position of the hydrogen refueling panel to determine whether the hydrogen refueling panel is closed. When the vehicle is in an active state, if the limit switch indicates that the hydrogen refueling panel is not closed, the vehicle network unit will alert the driver through the warning unit; otherwise, no alarm will be triggered.

3. The method for safe hydrogen refueling of a multi-track vehicle as described in claim 1, characterized in that, The method for monitoring the hydrogen concentration is as follows: The hydrogen concentration sensor is located inside the hydrogen refueling panel. When the vehicle is in the active state, if the limit switch indicates an abnormal hydrogen concentration, the vehicle network unit will alert the driver through the warning unit; otherwise, no alarm will be triggered.

4. The method for safe hydrogen refueling of a multi-track vehicle as described in claim 1, characterized in that, The hydrogenation panel is redundantly equipped with two limit switches.

5. The method for safe hydrogen refueling of a multi-track vehicle as described in claim 1, characterized in that, The vehicle status that meets the hydrogen refueling requirements is as follows: the vehicle power mode switch is in the "electric" position, the energy storage battery is in the off state, the vehicle activation switch is in the off state, and the interlock key is in the state where the vehicle activation switch is not inserted.

6. The method for safe hydrogen refueling of a multi-track vehicle as described in claim 3, characterized in that, When the vehicle network unit receives an abnormal concentration information from the hydrogen concentration sensor and determines the vehicle's power mode, if the vehicle power module is in the "electric" position, the vehicle network unit sends a cut-off signal to the vehicle control system. The vehicle control system then cuts off the hydrogen power system and alerts the driver through the warning unit. Otherwise, it only alerts the driver through the warning unit.

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