Monitoring system for fuel cell engine, engine and monitoring method

Abstract

The invention discloses a monitoring system for a fuel cell engine, the engine and a monitoring method. The monitoring system comprises a first monitoring device, a second monitoring device and an inner box body, the inner box body is arranged in the fuel cell engine, a hydrogen-related area is formed between the inner box body and the electric pile box body, and the hydrogen-related area is used for accommodating a hydrogen-related part; a non-hydrogen-related area is formed between the inner box body and the outer box body; the first monitoring device comprises a first hydrogen concentration sensor, the first hydrogen concentration sensor is an explosion-proof type hydrogen concentration sensor, and the first hydrogen concentration sensor is arranged in a hydrogen related area and used for monitoring whether gas leakage exists between pipelines or not; the second monitoring device comprises a second hydrogen concentration sensor, and the second hydrogen concentration sensor is arranged in the non-hydrogen-related area and used for monitoring whether gas leakage exists between the pipelines or not. The monitoring system can effectively monitor the core dangerous area of the fuel cell engine, and the operation safety of the fuel cell engine is improved. The monitoring method can scientifically guide the operation of the monitoring system.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cell engines, and particularly relates to a monitoring system, an engine and a monitoring method for a fuel cell engine. Background Art

[0002] New energy ships are supplemented with fuel cell engines as an environmentally friendly operation system. Therefore, it is particularly important to achieve a comprehensive perception of the state information of the fuel cell engine itself and the surrounding environment information, which can better meet the safe operation of the fuel cell engine in the ship field.

[0003] In a ship hydrogen fuel cell engine, the hydrogen environment is a Class I dangerous area. The explosion-proof performance of previous monitoring devices is insufficient, which is easy to cause damage, resulting in insufficient monitoring of the Class I dangerous area in the hydrogen fuel cell engine and prone to operation accidents of the hydrogen fuel cell engine. When fuel leaks inside the hydrogen fuel cell engine, previous monitoring devices with insufficient monitoring performance cannot detect and issue an alarm in time, thus there will be operation hidden dangers. In addition, the monitoring positions of previous monitoring devices are unreasonably arranged, making it difficult to effectively monitor the core dangerous area and there are situations that do not meet the monitoring requirements. Moreover, previous monitoring devices lack an independent power supply system and are easily affected by power loss, resulting in the loss of monitoring ability in the core dangerous area as a whole and prone to operation accidents.

[0004] Currently, there is a lack of a monitoring system for a fuel cell engine to effectively monitor the core dangerous area of the fuel cell engine. Currently, there is a lack of a fuel cell engine with this new monitoring system to ensure the safe operation of the fuel cell engine. Currently, there is a lack of a monitoring method for the new monitoring system to scientifically guide the operation of the monitoring system to ensure the safe operation of the fuel cell engine.

[0005] Therefore, a new technology is needed to solve the problem that there is a lack of a monitoring system for a fuel cell engine in the prior art. A new technology is needed to solve the problem that there is a lack of a fuel cell engine with a new monitoring system in the prior art. A new technology is needed to solve the problem that there is a lack of a monitoring method for the new monitoring system in the prior art. Summary of the Invention

[0006] To solve the above problems in the prior art, the present invention provides a monitoring system for a fuel cell engine, which can effectively monitor the core dangerous area of the fuel cell engine.

[0007] The present invention adopts the following technical solutions:

[0008] A monitoring system for a fuel cell engine, comprising a first monitoring device, a second monitoring device and an inner box body; the inner box body is arranged in the fuel cell engine, a hydrogen-involved area is formed between the inner box body and the stack box body, and the hydrogen-involved area is used to accommodate hydrogen-involved components; a non-hydrogen-involved area is formed between the inner box body and the outer box body; the first monitoring device includes a first hydrogen concentration sensor, the first hydrogen concentration sensor is an explosion-proof hydrogen concentration sensor, and the first hydrogen concentration sensor is arranged in the hydrogen-involved area for monitoring whether there is air leakage between pipelines; the second monitoring device includes a second hydrogen concentration sensor, and the second hydrogen concentration sensor is arranged in the non-hydrogen-involved area for monitoring whether there is air leakage between pipelines.

[0009] Further, the second hydrogen concentration sensor is a conventional hydrogen concentration sensor or an explosion-proof hydrogen concentration sensor.

[0010] Further, at least two first hydrogen concentration sensors are provided; at least two second hydrogen concentration sensors are provided.

[0011] Further, the first monitoring device further includes a first power supply; the second monitoring device further includes a second power supply; both the first power supply and the second power supply are arranged outside the outer box body of the fuel cell engine;

[0012] Two first hydrogen concentration sensors are provided, and both of the two first hydrogen concentration sensors are arranged in the hydrogen-involved area; two second hydrogen concentration sensors are provided, and both of the two second hydrogen concentration sensors are arranged in the non-hydrogen-involved area;

[0013] The first of the first hydrogen concentration sensors is connected to the first power supply; the first of the second hydrogen concentration sensors is connected to the first power supply;

[0014] The second of the first hydrogen concentration sensors is connected to the second power supply; the second of the second hydrogen concentration sensors is connected to the second power supply.

[0015] Further, the first monitoring device further includes a first controller; the second monitoring device further includes a second controller;

[0016] The first controller is connected to the first power supply;

[0017] The first of the first hydrogen concentration sensors is connected to the first controller; the first of the second hydrogen concentration sensors is connected to the first controller;

[0018] The second controller is connected to the second power supply;

[0019] The second of the first hydrogen concentration sensors is connected to the second controller; the second of the second hydrogen concentration sensors is connected to the second controller.

[0020] Further, the first hydrogen concentration sensor is disposed at the highest point of the hydrogen-related area, and a first arc-shaped structure for guiding hydrogen to flow towards the highest point is provided in the hydrogen-related area;

[0021] The second hydrogen concentration sensor is disposed at the highest point of the non-hydrogen-related area, and a second arc-shaped structure for guiding hydrogen to flow towards the highest point is provided in the non-hydrogen-related area.

[0022] Further, the monitoring system further includes a third monitoring device, the third monitoring device includes a third hydrogen concentration sensor, the third hydrogen concentration sensor is disposed on the fuel cell stack box, and the third hydrogen concentration sensor is used to monitor whether there is air leakage between single cells in the fuel cell stack box.

[0023] Further, there are two third hydrogen concentration sensors; both of the two third hydrogen concentration sensors are disposed on the fuel cell stack box;

[0024] The first third hydrogen concentration sensor is connected to the first power supply and the first controller;

[0025] The second third hydrogen concentration sensor is connected to the second power supply and the second controller.

[0026] Further, the third hydrogen concentration sensor has a third probe; the third probe is used to be inserted into a monitoring hole on the fuel cell stack box.

[0027] Another object of the present invention is to provide a fuel cell engine with a novel monitoring system to ensure the safe operation of the fuel cell engine.

[0028] A fuel cell engine includes a fuel cell stack module, a hydrogen supply system with pipelines, an outer box body, an air system, and the monitoring system for a fuel cell engine as described above;

[0029] The fuel cell stack module includes a fuel cell stack and a fuel cell stack box;

[0030] The fuel cell stack is disposed within the fuel cell stack box;

[0031] The inner box body is located between the fuel cell stack box and the outer box body;

[0032] The hydrogen supply system with pipelines is disposed in the hydrogen-related area;

[0033] The air system is disposed in the non-hydrogen-related area.

[0034] Another object of the present invention is to provide a monitoring method for the monitoring system to scientifically guide the operation of the monitoring system to ensure the safe operation of the fuel cell engine.

[0035] A monitoring method for a monitoring system, which is carried out based on the described monitoring system for a fuel cell engine, includes the following steps:

[0036] S1. When the volume concentration of hydrogen detected by any one of the first hydrogen concentration sensor and the second hydrogen concentration sensor reaches 0.5% and lasts for three seconds, the ship control system uses an audible alarm device or an emergency display method to alert the crew.

[0037] When the volume concentration of hydrogen detected by any one of the first hydrogen concentration sensor and the second hydrogen concentration sensor reaches 1% and lasts for three seconds, the ship control system normally shuts down the hydrogen source and the hydrogen fuel cell system.

[0038] When the volume concentration of hydrogen detected by any one of the first hydrogen concentration sensor and the second hydrogen concentration sensor reaches 2%, the ship control system immediately cuts off the hydrogen source and the hydrogen fuel cell system.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] The monitoring system for a fuel cell engine of the present invention separately partitions a hydrogen-related area and a non-hydrogen-related area through an inner box. The hydrogen-related area is a Class I hazardous area, and explosion-proof hydrogen concentration sensors are arranged to monitor whether there is air leakage between pipelines; while the non-hydrogen-related area, as a less important hazardous area, can flexibly choose to use traditional hydrogen concentration sensors or explosion-proof hydrogen concentration sensors for monitoring. This layout of the present invention can effectively monitor the core hazardous area of the fuel cell engine and improve the operation safety of the fuel cell engine.

[0041] Preferably, for this monitoring system, the present invention arranges at least two of the first hydrogen concentration sensors and the second hydrogen concentration sensors respectively. Each first hydrogen concentration sensor operates with an independent power supply, and each second hydrogen concentration sensor operates with an independent power supply, ensuring that at least one first hydrogen concentration sensor is used for operation and at least one first hydrogen concentration sensor is used as a backup, and at least one second hydrogen concentration sensor is used for operation and at least one second hydrogen concentration sensor is used as a backup, effectively guaranteeing the monitoring ability of the fuel cell engine for the hydrogen concentration in the hazardous area and improving the operation safety of the fuel cell engine.

[0042] Preferably, the first hydrogen concentration sensor of the present invention is arranged at the highest point of the hydrogen-involved area and is provided with a first arc structure for hydrogen drainage, which improves the monitoring ability of the first hydrogen concentration sensor for the hydrogen concentration in the core dangerous area; the second hydrogen concentration sensor of the present invention is arranged at the highest point of the non-hydrogen-involved area and is provided with a second arc structure for hydrogen drainage, which improves the monitoring ability of the second hydrogen concentration sensor for the hydrogen concentration in the secondary important dangerous area.

[0043] The present invention optimizes the division of dangerous areas of the fuel cell engine, ensures the reliable operation of the monitoring system, improves the monitoring ability of the monitoring system for hydrogen, and improves the operation safety of the fuel cell engine.

[0044] A fuel cell engine of the present invention is equipped with a new type of monitoring system, which can ensure the safe operation of the fuel cell engine, effectively reduce the operation accidents of the fuel cell engine, and has important significance for the safe navigation of ships at sea.

[0045] A monitoring method of a monitoring system of the present invention establishes detection standards and feedback standards for hydrogen concentration of the new type of monitoring system, which can scientifically guide the operation of the new type of monitoring system to ensure the safe operation of the fuel cell engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The following further describes the technology of the present invention in detail with reference to the drawings and specific embodiments:

[0047] Figure 1 is a three-dimensional schematic diagram of the first perspective of the fuel cell engine of the present invention;

[0048] Figure 2 is a three-dimensional schematic diagram of the second perspective of the fuel cell engine of the present invention;

[0049] Figure 3 is a three-dimensional schematic diagram of the stack module of the present invention;

[0050] Figure 4 is Figure 1 a schematic diagram of a positive cross-section;

[0051] Figure 5 is Figure 4 a partial enlarged view at D;

[0052] Figure 6 is Figure 4 a partial enlarged view at E;

[0053] Figure 7This is a simplified schematic diagram of the fuel cell engine of the present invention and the first hydrogen concentration sensor, the second hydrogen concentration sensor, and the third hydrogen concentration sensor with independent power supply (wherein, the position between the first hydrogen concentration sensor and the first hydrogen concentration sensor is a simplified schematic, and there is no high-level difference in reality; the same applies to the remaining second and third hydrogen concentration sensors).

[0054] Reference numerals:

[0055] 1 - Outer box; 11 - Outer box purge inlet; 12 - Outer box purge outlet; 13 - Hydrogen interface; 14 - Drain port;

[0056] 2 - Inner box; 21 - Inner box purge inlet; 22 - Inner box purge outlet;

[0057] 3 - Stack box; 31 - Monitoring hole; 32 - Stack purge inlet; 33 - Stack purge outlet;

[0058] A - Hydrogen-related area; B - Non-hydrogen-related area; C - First enclosed area;

[0059] 41 - First hydrogen concentration sensor; 411 - First probe; 42 - Second hydrogen concentration sensor; 421 - Second probe; 43 - Third hydrogen concentration sensor; 431 - Third probe; 44 - Explosion-proof temperature sensor; 45 - Explosion-proof pressure sensor; 46 - Explosion-proof temperature and pressure integrated sensor;

[0060] 51 - First power supply; 52 - Second power supply;

[0061] 61 - First arc structure; D - Local enlarged drawing reference numeral; 62 - Second arc structure; E - Local enlarged drawing reference numeral;

[0062] 7 - Fuel cell engine. Detailed implementation manners

[0063] The following will clearly and completely describe the concept, specific structure, and technical effects generated by the present invention in combination with embodiments and the drawings to fully understand the purpose, solution, and effects of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0064] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the drawings.

[0065] Refer toFigures 1 to 7 , a monitoring system for a fuel cell engine, comprising a first monitoring device, a second monitoring device and an inner box body 2; the inner box body 2 is arranged in the fuel cell engine 7, and a hydrogen-involved area A is formed between the inner box body 2 and the stack box body 3, and the hydrogen-involved area A is used to accommodate hydrogen-involved components; a non-hydrogen-involved area B is formed between the inner box body 2 and the outer box body 1; the first monitoring device comprises a first hydrogen concentration sensor 41, the first hydrogen concentration sensor 41 is an explosion-proof hydrogen concentration sensor, and the first hydrogen concentration sensor 41 is arranged in the hydrogen-involved area A for monitoring whether there is air leakage between pipelines; the second monitoring device comprises a second hydrogen concentration sensor 42, and the second hydrogen concentration sensor 42 is arranged in the non-hydrogen-involved area B for monitoring whether there is air leakage between pipelines.

[0066] In the present invention, the inner box body 2 separately isolates the hydrogen-involved area A, and the explosion-proof hydrogen concentration sensor is arranged in the hydrogen-involved area A, which improves the monitoring ability of the monitoring system for the hydrogen concentration in the hydrogen-involved area A. Since this hydrogen-involved area is a Class I dangerous area, it is particularly important to effectively monitor the hydrogen concentration in this Class I dangerous area. In the present invention, an explosion-proof hydrogen concentration sensor is arranged in the hydrogen-involved area A, effectively avoiding the situation that the traditional sensor is prone to damage due to poor explosion-proof performance, establishing an effective detection of the hydrogen concentration in the Class I dangerous area, and effectively avoiding the problem that the fuel cell engine is prone to operating accidents due to insufficient monitoring of hydrogen leakage.

[0067] Refer to Figures 1 to 7 , in one embodiment, the second hydrogen concentration sensor 42 is a traditional hydrogen concentration sensor or an explosion-proof hydrogen concentration sensor. Hydrogen leakage may also occur in the non-hydrogen-involved area B, but its danger level is lower than that of the hydrogen-involved area A and is regarded as a less important dangerous area. Therefore, preferably, the second hydrogen concentration sensor 42 can be selected as a traditional hydrogen concentration sensor.

[0068] In one embodiment, at least two first hydrogen concentration sensors 41 are provided, and each first hydrogen concentration sensor 41 is connected to an independent power supply. This layout design ensures that at least one first hydrogen concentration sensor 41 is operating and at least one first hydrogen concentration sensor 41 is in standby, realizing the separate power supply operation of the first hydrogen concentration sensor 41 in the core dangerous area and ensuring the safe operation of the fuel cell engine 7.

[0069] At least two second hydrogen concentration sensors 42 are provided, and each second hydrogen concentration sensor 42 is connected to an independent power supply. This layout design ensures that at least one second hydrogen concentration sensor 42 is operating and at least one second hydrogen concentration sensor 42 is in standby, realizing the separate power supply operation of the second hydrogen concentration sensor 42 in the less important dangerous area and ensuring the safe operation of the fuel cell engine 7.

[0070] Referring to Figure 7 , in one embodiment, the first monitoring device further includes a first power source 51; the second monitoring device further includes a second power source 52; both the first power source 51 and the second power source 52 are disposed outside the outer casing 1 of the fuel cell engine;

[0071] Two first hydrogen concentration sensors 41 are provided, and both of the two first hydrogen concentration sensors 41 are disposed in the hydrogen - involved area A; two second hydrogen concentration sensors 42 are provided, and both of the two second hydrogen concentration sensors 42 are disposed in the non - hydrogen - involved area B;

[0072] The first of the first hydrogen concentration sensors 41 is connected to the first power source 51; the first of the second hydrogen concentration sensors 42 is connected to the first power source 51;

[0073] The second of the first hydrogen concentration sensors 41 is connected to the second power source 52; the second of the second hydrogen concentration sensors 42 is connected to the second power source 52.

[0074] In one embodiment, the first monitoring device further includes a first controller; the second monitoring device further includes a second controller;

[0075] The first controller is connected to the first power source 51;

[0076] The first of the first hydrogen concentration sensors 41 is connected to the first controller; the first of the second hydrogen concentration sensors 42 is connected to the first controller;

[0077] The second controller is connected to the second power source 52;

[0078] The second of the first hydrogen concentration sensors 41 is connected to the second controller; the second of the second hydrogen concentration sensors 42 is connected to the second controller.

[0079] Wherein, the first controller and the second controller are connected to the ship control system.

[0080] Preferably, the first controller and the second controller can be PLCs (programmable logic controllers).

[0081] Referring to Figures 4 to 6 , in one embodiment, the first hydrogen concentration sensor 41 is disposed at the highest point position in the hydrogen - involved area A, and a first arc - shaped structure 61 for guiding hydrogen to flow to the highest point position is provided in the hydrogen - involved area A;

[0082] The second hydrogen concentration sensor 42 is disposed at the highest point of the non-hydrogen-involved area B, and a second arc-shaped structure 62 for guiding hydrogen to flow to the highest point is provided in the non-hydrogen-involved area B.

[0083] Among them, since the density of hydrogen is small and the gas accumulates upward, if the first hydrogen concentration sensor 41 and the second hydrogen concentration sensor 42 are not arranged at the highest point of the corresponding area, there may be a situation where hydrogen cannot accumulate to the position of the hydrogen concentration sensor, and monitoring delay may occur. In the present invention, the first hydrogen concentration sensor 41 and the second hydrogen concentration sensor 42 are arranged at the highest point of the corresponding area, which can improve the monitoring ability of the monitoring system for hydrogen. At the same time, the present invention arranges the first arc-shaped structure 61 and the second arc-shaped structure 62, which is conducive to guiding the leaked hydrogen in the corresponding area to the highest point, facilitating the detection by the hydrogen concentration sensor, making the monitoring system more timely in monitoring, and more reliably ensuring the operation safety of the fuel cell engine 7.

[0084] Refer to Figures 4 to 6 , preferably, the first hydrogen concentration sensor 41 has a first probe 411, and the first probe 411 is arranged close to the first arc-shaped structure 61 on one side. When hydrogen leaks, the first probe 411 detects it, then the first hydrogen concentration sensor 41 generates a signal and outputs the signal to a controller (such as a PLC) for the next control of the ship control system.

[0085] Refer to Figures 4 to 6 , preferably, the second hydrogen concentration sensor 42 has a second probe 421, and the second probe 421 is arranged close to the second arc-shaped structure 62 on one side. When hydrogen leaks, the second probe 421 detects it, then the second hydrogen concentration sensor 42 generates a signal and outputs the signal to a controller (such as a PLC) for the next control of the ship control system. [[ID=]14]

[0086] Refer to Figure 3 , in one embodiment, the monitoring system further includes a third monitoring device, and the third monitoring device includes a third hydrogen concentration sensor 43. The third hydrogen concentration sensor 43 is disposed on the stack box 3, and the third hydrogen concentration sensor 43 is used to monitor whether there is air leakage between single cells in the stack box.

[0087] In one embodiment, the third hydrogen concentration sensor 43 is an explosion-proof hydrogen concentration sensor. For this core area, the present invention provides an explosion-proof hydrogen concentration sensor, which can improve the monitoring ability of the hydrogen concentration sensor for the area inside the stack box and is conducive to ensuring the operation safety of the fuel cell engine.

[0088] Refer to Figure 3, in one embodiment, two third hydrogen concentration sensors 43 are provided; both of the two third hydrogen concentration sensors 43 are disposed on the fuel cell stack box 3;

[0089] The first third hydrogen concentration sensor 43 is connected to the first power supply 51 and the first controller;

[0090] The second third hydrogen concentration sensor 43 is connected to the second power supply 52 and the second controller.

[0091] Referring to Figure 3 , in one embodiment, the third hydrogen concentration sensor 43 has a third probe 431; the third probe 431 is used to be inserted into the monitoring hole 31 on the fuel cell stack box. When hydrogen leaks, if the third probe 431 detects it, the third hydrogen concentration sensor 43 will generate a signal and output the signal to a controller (such as a PLC) for the next-step control of the ship control system.

[0092] Another object of the present invention is to provide a fuel cell engine with a new monitoring system to ensure the safe operation of the fuel cell engine.

[0093] Referring to Figures 1 to 7 , a fuel cell engine 7 includes a fuel cell stack module, a hydrogen supply system with pipelines, an outer box 1, an air system, and the monitoring system for the fuel cell engine as described above;

[0094] The fuel cell stack module includes a fuel cell stack and a fuel cell stack box 3;

[0095] The fuel cell stack is disposed within the fuel cell stack box 3;

[0096] The inner box 2 is located between the fuel cell stack box 3 and the outer box 1; a hydrogen-involved area A is formed between the inner box 2 and the fuel cell stack box 3, and a non-hydrogen-involved area B is formed between the inner box 2 and the outer box 1; a first closed area C is formed within the fuel cell stack box 3; the hydrogen-involved area A, the non-hydrogen-involved area B, and the first closed area C are all closed areas;

[0097] The hydrogen supply system with pipelines is disposed in the hydrogen-involved area A;

[0098] The air system is disposed in the non-hydrogen-involved area B.

[0099] Among them, for the hydrogen supply system and the air system, reference can be made to the hydrogen supply system and the air system on the ship.

[0100] Among them, since there may be gas leakage in the fuel cell stack cavity, resulting in hydrogen entering the air system, therefore, the second hydrogen concentration sensor 42 is required for monitoring.

[0101] In one embodiment, a fuel cell engine 7 further includes a cooling system disposed in the non-hydrogen-involved area B. The cooling system can refer to the cooling system on a ship.

[0102] In one embodiment, the fuel cell stack is formed by stacking multiple single-cell batteries.

[0103] In one embodiment, the third monitoring device includes a third hydrogen concentration sensor 43. The third probe 431 of the third hydrogen concentration sensor 43 is arranged at the highest point in the first enclosed area C for monitoring whether there is air leakage between single-cell batteries. When hydrogen leaks out from the first enclosed area C and the hydrogen concentration reaches a certain level, the third hydrogen concentration sensor 43 monitors the hydrogen information and transmits the signal to the controller. Since the controller is connected to the ship control system, the ship control system controls the corresponding components to act, cut off the hydrogen supply and send out an alarm signal. Among them, due to the low density of hydrogen, the gas accumulates upward. If the third hydrogen concentration sensor 43 is not arranged at the highest point in the first enclosed area C, there may be a situation where hydrogen cannot accumulate to the position of the hydrogen concentration sensor, resulting in monitoring delay. In the present invention, the third hydrogen concentration sensor 43 is arranged at the highest point in the first enclosed area C, which can improve the monitoring ability of the monitoring system for hydrogen and ensure the safe operation of the fuel cell engine.

[0104] Refer to Figures 1 to 6 , in one embodiment, the outer box body 1 is provided with an outer box body purge inlet 11 and an outer box body purge outlet 12; the outer box body purge inlet 11 is connected from the outside of the outer box body 1 into the non-hydrogen-involved area B; the outer box body purge outlet 12 is connected from the non-hydrogen-involved area B to the outside of the outer box body 1; hydrogen can enter from the outer box body purge inlet 11, pass through the pipeline and come out from the outer box body purge outlet 12.

[0105] Refer to Figures 1 to 6 , in one embodiment, the inner box body 2 is provided with an inner box body purge inlet 21 and an inner box body purge outlet 22; the inner box body purge inlet 21 is connected from the outside of the outer box body 1 into the inner box body 2; the inner box body purge outlet 22 is connected from the inside of the inner box body 2 to the outside of the outer box body 1; hydrogen can enter from the inner box body purge inlet 21, pass through the pipeline and come out from the inner box body purge outlet 22.

[0106] Refer to Figures 1 to 6, in one embodiment, the stack box 3 is provided with a stack purge inlet 32 and a stack purge outlet 33; the stack purge inlet 32 is connected from the outside of the outer box 1 into the inside of the stack box 3; the stack purge outlet 33 is connected from the inside of the stack box 3 out to the outside of the outer box 1; hydrogen can enter from the stack purge inlet 32, pass through the pipeline and come out from the stack purge outlet 33.

[0107] Refer to Figure 7 , in one embodiment, the outer box purge inlet 11, which is connected from the outside of the outer box 1 into the pipeline of the non-hydrogen-involved area B, has a branch, and one branch is communicated with the stack purge inlet 32.

[0108] Refer to Figures 1 to 2 , in one embodiment, the outer box 1 is further provided with a hydrogen interface 13, and the hydrogen interface 13 is used for connecting with a hydrogen delivery pipeline.

[0109] Refer to Figures 1 to 2 , in one embodiment, the outer box 1 is further provided with a drain port 14, and the drain port 14 is used for connecting with a drain pipeline.

[0110] Refer to Figure 3 , in one embodiment, the stack box 3 is further provided with an explosion-proof temperature sensor 44, an explosion-proof pressure sensor 45, and an explosion-proof temperature and pressure integrated sensor 46. The explosion-proof temperature sensor 44 is used for monitoring temperature; the explosion-proof pressure sensor 45 is used for monitoring pressure; the explosion-proof temperature and pressure integrated sensor 46 is used for monitoring temperature and pressure.

[0111] Another object of the present invention is to provide a monitoring method for a monitoring system to scientifically guide the operation of the monitoring system to ensure the safe operation of the fuel cell engine.

[0112] Refer to Figure 7 , a monitoring method for a monitoring system, which is carried out based on the above-mentioned monitoring system for a fuel cell engine, includes the following steps:

[0113] S1. When any one of the first hydrogen concentration sensor 41, the second hydrogen concentration sensor 42, and the third hydrogen concentration sensor 43 detects that the hydrogen volume concentration reaches 0.5% and lasts for three seconds, the ship control system uses an audible alarm device or an emergency display method to prompt the crew to pay attention;

[0114] When any one of the first hydrogen concentration sensor 41, the second hydrogen concentration sensor 42, and the third hydrogen concentration sensor 43 detects that the hydrogen volume concentration reaches 1% and lasts for three seconds, the ship control system normally shuts down the hydrogen source and the hydrogen fuel cell system;

[0115] When the hydrogen volume concentration detected by any one of the first hydrogen concentration sensor 41, the second hydrogen concentration sensor 42, and the third hydrogen concentration sensor 43 reaches 2%, the ship control system immediately cuts off the hydrogen source and the hydrogen fuel cell system.

[0116] Among them, for the ship control system, the sound alarm device, the hydrogen source, and the hydrogen fuel cell system, reference can be made to the control system, the sound alarm device, the hydrogen source, and the hydrogen fuel cell system used in ships.

[0117] For other contents of the monitoring system, the engine, and the monitoring method for a fuel cell engine according to the present invention, reference can be made to the prior art and will not be elaborated here.

[0118] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A monitoring system for a fuel cell engine, characterized in that, It includes a first monitoring device, a second monitoring device and an inner box body; the inner box body is arranged in a fuel cell engine, a hydrogen-involved area is formed between the inner box body and a stack box body, and the hydrogen-involved area is used to accommodate hydrogen-involved components; a non-hydrogen-involved area is formed between the inner box body and an outer box body; the first monitoring device includes a first hydrogen concentration sensor, the first hydrogen concentration sensor is an explosion-proof hydrogen concentration sensor, and the first hydrogen concentration sensor is arranged in the hydrogen-involved area for monitoring whether there is air leakage between pipelines; the second monitoring device includes a second hydrogen concentration sensor, and the second hydrogen concentration sensor is arranged in the non-hydrogen-involved area for monitoring whether there is air leakage between pipelines.

2. The monitoring system for a fuel cell engine according to claim 1, characterized in that, There are at least two of the first hydrogen concentration sensors; there are at least two of the second hydrogen concentration sensors.

3. The monitoring system for a fuel cell engine according to claim 2, characterized in that, The first monitoring device further includes a first power supply; the second monitoring device further includes a second power supply; There are two of the first hydrogen concentration sensors, and both of the two first hydrogen concentration sensors are arranged in the hydrogen-involved area; there are two of the second hydrogen concentration sensors, and both of the two second hydrogen concentration sensors are arranged in the non-hydrogen-involved area; The first of the first hydrogen concentration sensors is connected to the first power supply; the first of the second hydrogen concentration sensors is connected to the first power supply; The second of the first hydrogen concentration sensors is connected to the second power supply; the second of the second hydrogen concentration sensors is connected to the second power supply.

4. The monitoring system for a fuel cell engine according to claim 3, wherein, The first monitoring device further includes a first controller; the second monitoring device further includes a second controller; The first controller is connected to the first power supply; The first of the first hydrogen concentration sensors is connected to the first controller; the first of the second hydrogen concentration sensors is connected to the first controller; The second controller is connected to the second power supply; The second of the first hydrogen concentration sensors is connected to the second controller; the second of the second hydrogen concentration sensors is connected to the second controller.

5. The monitoring system for a fuel cell engine according to claim 1, wherein, The first hydrogen concentration sensor is arranged at the highest point position in the hydrogen-involved area, and a first arc-shaped structure for guiding hydrogen to flow to the highest point position is arranged in the hydrogen-involved area; The second hydrogen concentration sensor is arranged at the highest point position in the non-hydrogen-involved area, and a second arc-shaped structure for guiding hydrogen to flow to the highest point position is arranged in the non-hydrogen-involved area.

6. The monitoring system for a fuel cell engine according to claim 4, characterized in that, The monitoring system further includes a third monitoring device, the third monitoring device includes a third hydrogen concentration sensor, the third hydrogen concentration sensor is arranged on the stack box body, and the third hydrogen concentration sensor is used to monitor whether there is air leakage between single cells in the stack box body.

7. The monitoring system for a fuel cell engine according to claim 6, characterized in that, There are two of the third hydrogen concentration sensors; both of the two third hydrogen concentration sensors are arranged on the stack box body; The first of the third hydrogen concentration sensors is connected to the first power supply and the first controller; The second of the third hydrogen concentration sensors is connected to the second power supply and the second controller.

8. The monitoring system for a fuel cell engine according to claim 6, characterized in that, The third hydrogen concentration sensor has a third probe; the third probe is used to be inserted into a monitoring hole on the stack box body.

9. A fuel cell engine, characterized in that, It includes a stack module, a hydrogen supply system with pipelines, an outer box body, an air system and a monitoring system for a fuel cell engine according to any one of claims 1-8; The stack module includes a stack and a stack box; The stack is arranged inside the stack box; The inner box is located between the stack box and the outer box; The hydrogen supply system with pipelines is arranged in the hydrogen - involved area; The air system is arranged in the non - hydrogen - involved area.

10. A monitoring method for a monitoring system, which is carried out based on the monitoring system for a fuel cell engine according to any one of claims 1 to 8, characterized in that, It includes the following steps: S1. When the volume concentration of hydrogen detected by any one of the first hydrogen concentration sensor and the second hydrogen concentration sensor reaches 0.5% and lasts for three seconds, the ship control system uses an audible alarm device or an emergency display method to alert the crew; When the volume concentration of hydrogen detected by any one of the first hydrogen concentration sensor and the second hydrogen concentration sensor reaches 1% and lasts for three seconds, the ship control system normally shuts down the hydrogen source and the hydrogen fuel cell system; When the volume concentration of hydrogen detected by any one of the first hydrogen concentration sensor and the second hydrogen concentration sensor reaches 2%, the ship control system immediately cuts off the hydrogen source and the hydrogen fuel cell system.

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