A high power hydrogen fuel cell engine system

Abstract

The present invention discloses a high-power hydrogen fuel cell engine system, including a support frame, a battery stack frame, a battery stack, an air system, a hydrogen system, a water thermal management system and an electrical control system, wherein the battery stack is fixed in the battery stack frame, and the air system, the hydrogen system, the water thermal management system and the electrical control system are detachably fixed around the battery stack frame, and the battery stack frame is fixed on the support frame. The hydrogen fuel cell engine system has a high degree of system integration, and almost all the core components of the hydrogen fuel cell engine system are integrated around the battery stack and fixed on a support frame, occupying a small volume, which is convenient for the installation of the engine system, and at the same time optimizes the layout and position relationship of each system component, which can effectively improve the response speed of the engine system and the ability to adapt to extreme climate conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of engine systems, and in particular to a high-power hydrogen fuel cell engine system. Background Art

[0002] As the global greenhouse effect continues to rise, the development of new energy sources that can replace fossil fuels is extremely critical. Hydrogen energy is called the ultimate energy of the 21st century. The chemical energy conversion process in which it participates does not emit any pollutants. The hydrogen fuel cell engine system used in medium and heavy-duty commercial trucks and logistics vehicles provides very convenient conditions for energy development and utilization, which can greatly reduce greenhouse gas emissions and the rigid demand for fossil fuels.

[0003] The fuel cell engine systems available in the prior art generally have problems such as low power output and low system integration. Under vehicle-mounted operating conditions, it is difficult to achieve stable and reliable high power output and high integration and close integration with the entire vehicle. Summary of the invention

[0004] The present invention proposes a hydrogen fuel cell engine system, which has a high degree of integration, tight connection, small occupied volume, and is easy to disassemble and repair. At the same time, the positional relationship between various system components is optimized, and the response speed of the engine system and the ability to adapt to extreme climatic conditions are improved.

[0005] A high-power hydrogen fuel cell engine system, comprising a support frame, a battery stack frame, a battery stack, an air system, a hydrogen system, a water thermal management system and an electrical control system, wherein the battery stack is fixed in the battery stack frame, the air system, the hydrogen system, the water thermal management system and the electrical control system are detachably fixed around the battery stack frame, and the battery stack frame is fixed on the support frame;

[0006] The intercooler of the air system and the electric water pump, electronic thermostat and PTC heater of the water thermal management system are respectively fixed on both sides of the battery stack frame, with the air inlet of the intercooler facing upward; the high-voltage box, fuel cell controller, remote monitoring module of the electrical control system and the hydrogen concentration detection box of the air system are fixed on the top of the battery stack frame, and the hydrogen concentration detection box is arranged at the air outlet of the battery stack; the remaining components of each system are fixed at the bottom of the battery stack frame and are located between the battery stack frame and the support frame.

[0007] As a preferred embodiment of the above technical solution, the air system also includes a humidifier and a low-pressure air intake pressure sensor. The humidifier is arranged at the lower end of the air system, and the low-pressure air intake pressure sensor is arranged at the air inlet of the battery stack.

[0008] As a preferred embodiment of the above technical solution, the hydrogen system includes a high-pressure solenoid valve, a high-pressure hydrogen inlet pressure sensor, a hydrogen proportional valve, a low-pressure hydrogen inlet pressure sensor, a hydrogen-water separator, a hydrogen circulation pump, a pressure relief valve and a heating solenoid valve. The high-pressure solenoid valve, the high-pressure hydrogen inlet pressure sensor and the hydrogen proportional valve are integrated and installed. The low-pressure hydrogen inlet pressure sensor is arranged at the hydrogen inlet of the battery stack, the hydrogen-water separator and the hydrogen circulation pump are arranged at the hydrogen outlet of the battery stack, and the hydrogen-water separator and the heating solenoid valve are located below the hydrogen outlet of the battery stack.

[0009] As a preferred embodiment of the above technical solution, the water outlet of the battery stack, the hydrogen-water separator and the water outlet pipeline of the heating solenoid valve are arranged from top to bottom.

[0010] As a preferred embodiment of the above technical solution, the water thermal management system also includes an electric water pump, an electronic thermostat, a PTC heater, a water inlet pressure sensor, a water inlet temperature sensor, a drain valve and a water outlet temperature sensor, and the drain valve and the electric water pump are located at the bottom of the water thermal management system.

[0011] As a preferred embodiment of the above technical solution, the hydrogen system and the water thermal management system further include a plate heat exchanger, and the plate heat exchanger is fixed on the battery stack.

[0012] As a preferred embodiment of the above technical solution, the electrical control system further includes a hydrogen pump controller, which is arranged on the side of the hydrogen circulation pump and located above the humidifier.

[0013] As a preferred embodiment of the above technical solution, the battery stack frame is made of 20 mm thick 6061 aluminum alloy.

[0014] As a preferred embodiment of the above technical solution, fixed supports for connecting to the support frame are symmetrically provided at the bottom of the battery stack frame.

[0015] As a preferred embodiment of the above technical solution, the top of the battery stack frame is also symmetrically provided with lifting ears.

[0016] The beneficial effects of the present invention are:

[0017] 1. The system has a high degree of integration. Almost all the core components of the hydrogen fuel cell engine system are integrated around the battery stack and fixed on a support frame, which occupies a small volume and is convenient for the installation of the engine system.

[0018] 2. The support frame, battery stack frame and all other components are detachable, and some components are integrated to facilitate later disassembly and maintenance.

[0019] 3. The layout and position relationship of each system component have been optimized, which can effectively improve the response speed of the engine system and its ability to adapt to extreme climatic conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 Schematic diagram of the split structure of the support frame and the battery stack frame.

[0022] Figure 3 Schematic diagram of the bottom structure of the battery stack frame Figure 1 .

[0023] Figure 4 Schematic diagram of the bottom structure of the battery stack frame Figure 2 .

[0024] Figure 5 Schematic diagram of the battery stack frame structure.

[0025] The accompanying drawings are marked as follows: 1-support frame, 2-battery stack frame, 3-battery stack, 4-intercooler, 5-humidifier, 6-low-pressure air intake pressure sensor, 7-hydrogen concentration detection box, 8-high-pressure solenoid valve, 9-high-pressure hydrogen inlet pressure sensor, 10-hydrogen proportional valve, 11-low-pressure hydrogen inlet pressure sensor, 12-plate heat exchanger, 13-hydrogen-water separator, 14-hydrogen circulation pump, 15-pressure relief valve, 16-heating solenoid valve, 17-electric water pump, 18-electronic thermostat, 19-PTC heater, 20-water inlet pressure sensor, 21-water inlet temperature sensor, 22-drain valve, 23-water outlet temperature sensor, 24-high-pressure box, 25-fuel cell controller, 26-remote monitoring module, 27-hydrogen pump controller, 28-fixed support, 29-lifting support ear. DETAILED DESCRIPTION

[0026] This embodiment is described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 5 A high-power hydrogen fuel cell engine system shown includes a support frame 1, a battery stack frame 2, a battery stack 3, an air system, a hydrogen system, a water thermal management system and an electrical control system, wherein the battery stack 3 is fixed in the battery stack frame 2, and the air system, the hydrogen system, the water thermal management system and the electrical control system are detachably fixed around the battery stack frame 2, and the battery stack frame 2 is fixed on the support frame 1;

[0028] The intercooler 4 of the air system and the electric water pump 17, electronic thermostat 18 and PTC heater 19 of the water thermal management system are respectively fixed on both sides of the battery stack frame 2, and the air inlet of the intercooler 4 faces upward; the high-voltage box 24, fuel cell controller 25, remote monitoring module 26 of the electrical control system and the hydrogen concentration detection box 7 of the air system are fixed on the top of the battery stack frame 2, and the hydrogen concentration detection box 7 is arranged at the air outlet of the battery stack 3; the remaining components of each system are fixed at the bottom of the battery stack frame 2 and are located between the battery stack frame 2 and the support frame 1.

[0029] Specifically, the upward opening of the intercooler 4 can ensure that air enters the humidifier 5 from top to bottom, and the air inlet is arranged at a high position to avoid the risk of flooding; the external independent hydrogen concentration detection box 7 is easy to install, occupies a small volume, and is convenient for the later replacement of the hydrogen concentration detection box 7. The hydrogen concentration detection box 7 is arranged at the purge port at the top of the battery stack 3, and the detection response time is short; the high-voltage box 24, the fuel cell controller 25 and the remote monitoring module 26 are arranged on the top of the battery stack 3, which is convenient for the later maintenance and repair of electrical components and the plugging and unplugging of connectors. Among them, the function of the high-voltage box 24 is to turn on and off the external output current and voltage of the fuel cell system and to monitor the output current and voltage. The function of the fuel cell controller 25 is to control the coordinated work between the various electrical components of the fuel cell system. The function of the remote monitoring module 26 is to monitor the operation of the fuel cell system in real time and upload the records to the background platform.

[0030] In this embodiment, the air system further includes a humidifier 5 and a low-pressure air intake pressure sensor 6 . The humidifier 5 is arranged at the lowest end of the air system, and the low-pressure air intake pressure sensor 6 is arranged at the air inlet of the battery stack 3 .

[0031] Specifically, the humidifier 5 is arranged at the bottom of the air system to prevent excess water in the humidifier 5 from entering the battery stack 3, and also facilitates the water generated by the battery stack 3 to be discharged from the battery stack 3, further avoiding the risk of flooding of the battery stack 3. The low-pressure air intake pressure sensor 6 is used to monitor the air intake pressure, thereby controlling the air intake pressure at the front end of the battery stack 3 to meet the air volume requirement for the battery stack 3 reaction.

[0032] In this embodiment, the hydrogen system includes a high-pressure solenoid valve 8, a high-pressure hydrogen inlet pressure sensor 9, a hydrogen proportional valve 10, a low-pressure hydrogen inlet pressure sensor 11, a hydrogen-water separator 13, a hydrogen circulation pump 14, a pressure relief valve 15 and a heating solenoid valve 16. The high-pressure solenoid valve 8, the high-pressure hydrogen inlet pressure sensor 9 and the hydrogen proportional valve 10 are integrated and installed. The low-pressure hydrogen inlet pressure sensor 11 is arranged at the hydrogen inlet of the battery stack 3, the hydrogen-water separator 13 and the hydrogen circulation pump 14 are arranged at the hydrogen outlet of the battery stack 3, and the hydrogen-water separator 13 and the heating solenoid valve 16 are located below the hydrogen outlet of the battery stack 3.

[0033] Specifically, the high-pressure solenoid valve 8, the high-pressure hydrogen inlet pressure sensor 9 and the hydrogen proportional valve 10 are integrated to facilitate the overall disassembly and assembly of the three components, increase the hydrogen inlet pressure monitoring reaction speed, and control the opening of the hydrogen proportional valve 10 through the detection value of the low-pressure hydrogen inlet pressure sensor 11 at the hydrogen inlet of the battery stack 3, thereby providing sufficient hydrogen for the battery stack 3 reaction. The gas coming out of the hydrogen outlet of the battery stack 3 is a mixed gas containing unreacted hydrogen and water vapor generated by the reaction. The mixed gas is separated by the hydrogen-water separator 13, and the separated hydrogen is pressurized by the hydrogen circulation pump 14 and enters the battery stack 3 to participate in the reaction again. The water separated by the hydrogen-water separator 13 is discharged through the heating solenoid valve 16. The heating function of the heating solenoid valve 16 can effectively prevent the separated water from freezing in a low-temperature environment and blocking the drainage channel of the engine system. The hydrogen-water separator 13 and the hydrogen circulation pump 14 are arranged at the hydrogen outlet of the battery stack 3, which can ensure that the pipeline from the mixed gas coming out of the hydrogen outlet to the hydrogen circulation pump 14 is as short as possible, increase the intake back pressure of the hydrogen circulation pump 14, and avoid the pipeline being too long and causing the pipeline to be sucked out. The hydrogen-water separator 13 and the heating solenoid valve 16 are located below the hydrogen outlet of the battery stack 3, which facilitates the discharge of excess water generated by the reaction of the battery stack 3 from the battery stack 3, further avoiding the risk of flooding of the battery stack 3.

[0034] In this embodiment, the water outlet of the battery stack 3, the hydrogen-water separator 13 and the water outlet pipeline of the heating solenoid valve 16 are arranged from top to bottom.

[0035] Specifically, the water outlet of the battery stack 3, the hydrogen-water separator 13 and the water outlet pipeline of the heating solenoid valve 16 are arranged from top to bottom to increase the discharge speed of the reaction water and avoid freezing of the water remaining in the pipeline and blocking the pipeline in a low temperature environment.

[0036] In this embodiment, the water thermal management system also includes an electric water pump 17, an electronic thermostat 18, a PTC heater 19, a water inlet pressure sensor 20, a water inlet temperature sensor 21, a drain valve 22 and a water outlet temperature sensor 23, and the drain valve 22 and the electric water pump 17 are located at the bottom of the water thermal management system.

[0037] Specifically, when the water inlet temperature sensor 21 detects that the temperature of the antifreeze liquid in the water thermal management system is higher than the preset temperature, the antifreeze liquid pumped out by the electric water pump 17 reaches the electronic thermostat 18, the large circulation port of the electronic thermostat 18 is opened, and the small circulation port is closed, and the antifreeze liquid flows out through the large circulation port of the electronic thermostat 18 to the external heat dissipation device for cooling. The antifreeze liquid after cooling enters the battery stack 3 from the water inlet of the battery stack 3 through the pipeline, takes away the heat generated by the reaction of the battery stack 3, and then enters the electric water pump 17 for pressurization to form a heat dissipation cooling circuit after coming out of the water outlet of the battery stack 3; when the water inlet temperature sensor 21 detects that the water When the temperature of the antifreeze in the thermal management system is lower than the preset temperature, the antifreeze pumped out by the electric water pump 17 reaches the electronic thermostat 18, the small circulation port of the electronic thermostat 18 is opened, the large circulation is closed, and the antifreeze flows out through the small circulation port of the electronic thermostat 18 to the PTC heater 19. The antifreeze heated by the PTC heater 19 enters the battery stack 3 through the pipeline, heats and activates the battery stack 3, ensures that the battery stack 3 undergoes an electrochemical reaction at a preset appropriate temperature, improves the fuel utilization rate and the service life of the battery stack 3, and then the antifreeze flows out from the water outlet of the battery stack 3 to the electric water pump 17 for pressurization to form a heating circuit. Before the battery stack 3 enters the water, a water inlet pressure sensor 20 and a water inlet temperature sensor 21 are provided, and after the battery stack 3 exits the water, a water outlet temperature sensor 23 is provided. By detecting the temperature and pressure of the water inlet and outlet, the speed of the electric water pump 17, the opening and closing of the electronic thermostat 18, and the opening of the PTC heater 19 are adjusted to ensure that the battery stack 3 always works at the preset most suitable temperature.

[0038] In this embodiment, the hydrogen system and the water heat management system further include a plate heat exchanger 12 , and the plate heat exchanger 12 is fixed on the battery stack 3 .

[0039] Specifically, the plate heat exchanger 12 is connected in parallel to the hydrogen system and the water thermal management system, and uses the temperature of the antifreeze in the water thermal management system loop to heat the hydrogen entering the battery stack 3 to participate in the reaction, ensuring that the hydrogen participating in the reaction is basically consistent with the temperature of the battery stack 3, thereby improving hydrogen utilization.

[0040] In this embodiment, the electrical control system further includes a hydrogen pump controller 27 , which is disposed on a side of the hydrogen circulation pump 14 and located above the humidifier 5 .

[0041] Specifically, the arrangement of the hydrogen pump controller 27 shortens the connection harness between the hydrogen pump controller 27 and the hydrogen circulation pump 14, and the connector port of the hydrogen pump controller 27 faces outward, which is convenient for plugging and unplugging its connector and subsequent equipment testing and debugging.

[0042] In this embodiment, the battery stack frame 2 is made of 20 mm thick 6061 aluminum alloy.

[0043] Specifically, this material not only ensures the strength of the battery stack frame 2 and can effectively protect the battery stack 3 , but also can reduce the supporting weight of the support frame 1 .

[0044] In this embodiment, a fixing support 28 for connecting to the support frame 1 is symmetrically provided at the bottom of the battery stack frame 2 .

[0045] Specifically, the fixed supports 28 are symmetrically fixed on both sides of the bottom of the battery stack frame 2, with multiple groups provided on each side, and are fixedly connected to the top of the support frame 1, which is easy to disassemble and assemble and can ensure installation stability.

[0046] In this embodiment, the top of the battery stack frame 2 is symmetrically provided with lifting ears 29 .

[0047] Specifically, the lifting ears 29 are fixed on the four top corners of the battery stack frame 2, and are connected to the lifting ears 29 through external lifting equipment to lift the battery stack frame 2 with the battery stack 3 installed, so as to facilitate the installation of other components of each system on the battery stack frame 2, and also facilitate the installation of the battery stack frame 2 on the support frame 1.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-power hydrogen fuel cell engine system, characterized in that: It includes a support frame, a battery stack frame, a battery stack, an air system, a hydrogen system, a water thermal management system and an electrical control system, wherein the battery stack is fixed in the battery stack frame, and the air system, the hydrogen system, the water thermal management system and the electrical control system are detachably fixed around the battery stack frame, and the battery stack frame is fixed on the support frame; the intercooler of the air system and the electric water pump, the electronic thermostat and the PTC heater of the water thermal management system are respectively fixed on both sides of the battery stack frame, and the air inlet of the intercooler faces upward; the high-voltage box, the fuel cell controller, the remote monitoring module of the electrical control system and the hydrogen concentration detection box of the air system are fixed on the top of the battery stack frame, and the hydrogen concentration detection box is arranged at the air outlet of the battery stack; the remaining components of each system are fixed at the bottom of the battery stack frame and are located between the battery stack frame and the support frame; the air system includes a humidifier, and the humidifier is arranged at the bottom of the air system.

2. The hydrogen fuel cell engine system according to claim 1, characterized in that: The air system further comprises a low-pressure air intake pressure sensor, and the low-pressure air intake pressure sensor is arranged at the air inlet of the battery stack.

3. The hydrogen fuel cell engine system according to claim 2, characterized in that: The hydrogen system includes a high-pressure solenoid valve, a high-pressure hydrogen inlet pressure sensor, a hydrogen proportional valve, a low-pressure hydrogen inlet pressure sensor, a hydrogen-water separator, a hydrogen circulation pump, a pressure relief valve and a heating solenoid valve. The high-pressure solenoid valve, the high-pressure hydrogen inlet pressure sensor and the hydrogen proportional valve are integrated and installed. The low-pressure hydrogen inlet pressure sensor is arranged at the hydrogen inlet of the battery stack, the hydrogen circulation pump is arranged at the hydrogen outlet of the battery stack, and the hydrogen-water separator and the heating solenoid valve are located below the hydrogen outlet of the battery stack.

4. The hydrogen fuel cell engine system according to claim 3, characterized in that: The water outlet of the battery stack, the hydrogen-water separator and the water outlet pipeline of the heating solenoid valve are arranged from top to bottom.

5. The hydrogen fuel cell engine system according to claim 4, characterized in that: The water thermal management system also includes an electric water pump, an electronic thermostat, a PTC heater, a water inlet pressure sensor, a water inlet temperature sensor, a drain valve and a water outlet temperature sensor. The drain valve and the electric water pump are located at the bottom of the water thermal management system.

6. The hydrogen fuel cell engine system according to claim 5, characterized in that: The hydrogen system and water heat management system further include a plate heat exchanger, which is fixed on the battery stack.

7. The hydrogen fuel cell engine system according to claim 3, characterized in that: The electrical control system further comprises a hydrogen pump controller, which is arranged on the side of the hydrogen circulation pump and located above the humidifier.

8. The hydrogen fuel cell engine system according to claim 1, characterized in that: The battery stack frame is made of 20mm thick 6061 aluminum alloy.

9. The hydrogen fuel cell engine system according to claim 1, characterized in that: The bottom of the battery stack frame is symmetrically provided with fixed supports for connecting with the support frame.

10. The hydrogen fuel cell engine system according to claim 1, characterized in that: The top of the battery stack frame is also symmetrically provided with lifting ears.

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