High-power fuel cell integrated device

Abstract

According to the high-power fuel cell integrated device provided by the utility model, the electric piles of the fuel cell are modularly integrated and designed into the electric pile integrated cabinet body, and the electric piles in the electric pile integrated cabinet body are connected in series and / or in parallel according to the requirements of external output voltage and power, so that the required power and voltage grade requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and particularly relates to a high-power fuel cell integration device. Background Art

[0002] Existing fuel cell products often connect multiple sets of fuel cells in parallel, with relatively low power, generally around 200 kW. Moreover, manufacturing high-power fuel cell products has high requirements for the integration and process of the fuel cell stack. Also, the electrical power parameters of fuel cell products are directly related to the fuel cell stack. Currently, the fuel cell stacks used in vehicles are all of low voltage and small current, while fuel cells for ships or onshore power stations have significant differences in parameters such as power and voltage. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a high-power fuel cell integration device that can flexibly configure voltage and current parameters to meet the needs of fuel cells for ships and onshore power stations.

[0004] The technical solution of the utility model provides a high-power fuel cell integration device, including:

[0005] A fuel cell stack integration cabinet, including multiple fuel cell stacks connected in series and parallel, multiple hydrogen concentration sensors, and an inspection module;

[0006] Among them, the current generated by multiple fuel cell stacks connected in series and parallel is transmitted to the outside of the high-power fuel cell integration device through a copper bar; multiple hydrogen concentration sensors are used to monitor the hydrogen concentration inside the fuel cell stack integration cabinet; the inspection module is arranged on the top layer inside the fuel cell stack integration cabinet and is electrically connected to multiple fuel cell stacks through an inspection line, and is used to centrally manage the series or parallel connection of multiple fuel cell stacks inside the fuel cell stack integration cabinet according to the requirements of external output voltage and power;

[0007] An air compressor, arranged outside the fuel cell stack integration cabinet and connected to the fuel cell stack integration cabinet, for providing air for the fuel cell stack integration cabinet;

[0008] A hydrogen and hydrogen discharge gas path, arranged outside the fuel cell stack integration cabinet and connected to the fuel cell stack integration cabinet, for providing hydrogen;

[0009] A hydrogen circulation pump / ejector, arranged outside the fuel cell stack integration cabinet and connected to the hydrogen and hydrogen discharge gas path and the fuel cell stack integration cabinet, for re-injecting the hydrogen discharged from the fuel cell stack integration cabinet into the hydrogen and hydrogen discharge gas path.

[0010] Preferably, the air compressor includes:

[0011] An air humidifier arranged outside the fuel cell stack integration cabinet and connected to the fuel cell stack integration cabinet;

[0012] An air filter is connected to the air humidifier, and an air supercharger is connected to the air filter.

[0013] Preferably, the high-power fuel cell integrated device further includes a thermal management module disposed outside the stack integrated cabinet, and the thermal management module includes a radiator, a first water pump, and a water tank;

[0014] Both the first water pump and the water tank are connected to the stack integrated cabinet, and the radiator is respectively connected to the stack integrated cabinet.

[0015] Preferably, the high-power fuel cell integrated device further includes a water distributor and a second water pump disposed outside the stack integrated cabinet;

[0016] The water distributor is provided with an input end, a first output end, and a second output end. The input end is connected to the stack integrated cabinet, the first output end is connected to the second water pump, and the second output end is connected to the hydrogen circulation pump / ejector.

[0017] Preferably, the high-power fuel cell integrated device further includes a nitrogen inerting module, and the nitrogen inerting module includes:

[0018] A nitrogen passage, parallel to the hydrogen and hydrogen discharge gas path;

[0019] A solenoid valve, disposed between the hydrogen and hydrogen discharge gas path and the nitrogen passage, including a solenoid valve input end and a solenoid valve output end. The solenoid valve input end is connected to the nitrogen passage, and the solenoid valve output end is connected to the hydrogen and hydrogen discharge gas path, for unidirectionally conducting nitrogen;

[0020] A filter, disposed in the hydrogen and hydrogen discharge gas path, and the filter includes a filter input end and a filter output end. The filter input end is connected to the solenoid valve output end;

[0021] A proportional valve, disposed in the hydrogen and hydrogen discharge gas path, and is respectively connected to the filter output end and the stack integrated cabinet.

[0022] The technical solution of the present utility model proposes a high-power fuel cell integrated device. By modularly integrating the fuel cell stack into a stack integrated cabinet, according to the requirements of the external output voltage and power, the stacks inside the stack integrated cabinet are connected in series and parallel to meet the required power and voltage level requirements. Description of the Drawings

[0023] Figure 1 Schematic diagram of the high-power fuel cell integrated device;

[0024] Figure 2 Front view of the stack integrated cabinet;

[0025] Figure 3 Side view of the stack integrated cabinet.

[0026] Description of the reference numerals:

[0027] 1 - Filter; 2 - Supercharger; 3 - Humidifier; 4 - Tail exhaust valve; 5 - Cabinet tail exhaust valve; 6 - Solenoid valve; 7 - Water pump; 8 - Radiator; 9 - Water tank; 10 - Solenoid valve; 11 - Filter; 12 - Proportioning valve; 13 - Stack integrated cabinet; 14 - Water separator; 15 - Water pump; 16 - Hydrogen circulation pump / ejector; 17 - Copper busbar; 18 - Inspection circuit; 19 - Cooling water inlet; 20 - Air inlet; 21 - Hydrogen outlet; 22 - Nitrogen outlet; Nitrogen inlet - 23; Hydrogen / nitrogen inlet - 24; Cooling water outlet - 25; Air outlet - 26. Detailed implementation mode

[0028] The following further elaborates on the present utility model in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0029] As Figure 1 shown, the embodiment of the present utility model provides a high-power fuel cell integration device for large-power marine or land use, which modularly integrates the stacks of the fuel cell into a stack integrated cabinet, and designs the stacks in the stack integrated cabinet in series or parallel according to the requirements of the external output voltage and power, so as to meet the required power and voltage level requirements.

[0030] The stacks in the stack integrated cabinet will maintain a high degree of consistency during use, evenly distribute their output power. If a certain stack is damaged, it will withdraw from operation and power output, and the other stacks will evenly share the output power. In the embodiment of the present utility model, according to external requirements, multiple stacks inside the stack integrated cabinet automatically select to be connected in series or parallel, so that the output of the stack integrated cabinet reaches the required power and voltage level requirements. The current generated by all stacks is transported through the copper busbar in the cabinet to the DC / DC outside a high-power fuel cell integration device. The inspection module VCM of each stack is centrally placed on the top layer of the cabinet, and its circuit is directly designed to run inside the cabinet for centralized management, as Figure 2 shown. The stack integrated cabinet is designed with a certain protection level, the stack integrated cabinet is hermetically designed, hydrogen concentration sensors are simultaneously designed and arranged at multiple places on the stack integrated cabinet, and at the same time, the stack integrated cabinet has a certain explosion-proof strength, which can better meet the safety requirements of hydrogen fuel cells. At the same time, the stack integrated cabinet can be opened on both the side and the back, which is convenient for personnel to centrally repair the stack pipelines and circuits.

[0031] Outside the stack integrated cabinet, according to the technical parameter requirements of the stack, a high-power and large-flow air compressor (air filter, air supercharger, and air humidifier) and a hydrogen circulation pump / ejector are configured to centrally supply hydrogen and air to all stacks. An external high-power radiator, water pump, and water tank form a set of thermal management modules to centrally cool and manage all stacks. The water generated by each stack in the stack integrated cabinet can be separated from the gas and water through a water separator along with hydrogen and discharged to the outside. To prevent excessive backpressure and ensure the normal discharge of the generated water, a water pump is configured after the water separator to timely discharge the water generated in the stack cabinet according to the drainage requirements.

[0032] To ensure the safety of the high-power fuel cell integrated device, a nitrogen inerting module is designed in the configuration of the high-power fuel cell integrated device. Nitrogen can be connected to the hydrogen supply and hydrogen discharge pipelines. At the same time, it can also be directly connected to the stack integrated cabinet. In this way, not only the hydrogen supply pipeline is inerted and replaced, but also the entire stack integrated cabinet can be directly inerted. During normal operation, the inside of the stack integrated cabinet is in a nitrogen environment, which not only does not affect the normal operation of the stack but also avoids the explosion risk caused by hydrogen leakage from the stack. When the high-power fuel cell integrated device is not in operation for a long time, nitrogen can replace the residual hydrogen in the pipeline through the hydrogen pipeline, further ensuring the safety of the device. The layout of all pipelines in the stack cabinet is as Figure 3 shown.

Claims

1. A high-power fuel cell integrated device, characterized in that: include: The battery stack integrated cabinet includes multiple series-parallel battery stacks, multiple hydrogen concentration sensors and inspection modules; Among them, the current generated by multiple series-parallel stacks is transmitted to the outside of the high-power fuel cell integrated device through copper bars; multiple hydrogen concentration sensors are used to monitor the hydrogen concentration inside the stack integrated cabinet; the inspection module is arranged on the top layer inside the stack integrated cabinet, and is electrically connected to multiple stacks through inspection lines, and is used to centrally manage the series or parallel connection of multiple stacks inside the stack integrated cabinet according to the requirements of external output voltage and power; An air compressor is arranged outside the battery stack integrated cabinet, connected to the battery stack integrated cabinet, and used to provide air for the battery stack integrated cabinet; The hydrogen and hydrogen exhaust gas path is arranged outside the fuel cell integrated cabinet and connected to the fuel cell integrated cabinet to provide hydrogen; The hydrogen circulation pump / ejector is installed outside the fuel cell integrated cabinet, connected to the hydrogen and hydrogen exhaust gas path and the fuel cell integrated cabinet, and is used to refill the hydrogen exhausted from the fuel cell integrated cabinet into the hydrogen and hydrogen exhaust gas path.

2. A high-power fuel cell integrated device as claimed in claim 1, characterized in that: The air compressor comprises: An air humidifier provided outside the battery stack integrated cabinet and connected to the battery stack integrated cabinet; The air filter is connected to the air humidifier, and the air supercharger is connected to the air filter.

3. A high-power fuel cell integrated device as claimed in claim 1, characterized in that: The high-power fuel cell integrated device also includes a thermal management module arranged outside the fuel cell integrated cabinet, and the thermal management module includes a radiator, a first water pump and a water tank; The first water pump and the water tank are both connected to the battery stack integrated cabinet, and the radiators are respectively connected to the battery stack integrated cabinet.

4. A high-power fuel cell integrated device as claimed in claim 1, characterized in that: The high-power fuel cell integrated device also includes a water distributor and a second water pump arranged outside the fuel cell integrated cabinet; The water distributor is provided with an input end, a first output end and a second output end, wherein the input end is connected to the battery stack integrated cabinet, the first output end is connected to the second water pump, and the second output end is connected to the hydrogen circulation pump / ejector.

5. A high-power fuel cell integrated device as claimed in claim 1, characterized in that: The high-power fuel cell integrated device further includes a nitrogen inerting module, which includes: a nitrogen passage, parallel to the hydrogen and hydrogen exhaust passages; A solenoid valve is provided between the hydrogen and hydrogen exhaust gas path and the nitrogen gas path, comprising a solenoid valve input end and a solenoid valve output end, the solenoid valve input end is connected to the nitrogen gas path, and the solenoid valve output end is connected to the hydrogen and hydrogen exhaust gas path, and is used for unidirectional conduction of nitrogen; A filter is provided in the hydrogen and hydrogen exhaust gas path, the filter comprises a filter input end and a filter output end, and the filter input end is connected to the solenoid valve output end; A proportional valve is arranged in the hydrogen and hydrogen exhaust gas paths, and is connected to the filter output end and the battery stack integrated cabinet respectively.

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