A power system and control method of a hydrogen fuel cell vehicle with a cooling assembly

Abstract

The present invention discloses a power system and control method of a hydrogen fuel cell vehicle with a cooling component. The power system includes a first branch formed by connecting a supercapacitor, a DC / DC converter and a fuel cell DC converter in series through pipelines, and a second branch formed by connecting a motor controller and a motor in series through pipelines; the liquid inlet end of the first branch is connected to the liquid outlet end of the cooling component through a first pipeline, and the liquid outlet end of the first branch is connected to the liquid inlet end of the cooling component through a second pipeline; the second branch is connected to both ends of the first branch, and a water pump is provided on the second pipeline. The power system of the present invention includes a supercapacitor, a DC / DC converter, a fuel cell DC converter in series to form a first branch and a motor controller and a motor to form a second branch, so that the cooling component can cool the first branch and the second branch respectively, and the cooling component and the power system are arranged reasonably, which can meet the independent cooling requirements of different components in the power system and has a good cooling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell vehicles, and in particular to a power system with a cooling component of a hydrogen fuel cell vehicle and a control method thereof. Background Art

[0002] Fuel cell vehicles, as a new energy-driven vehicle, have the advantages of energy saving, no pollution, high efficiency, and low noise, and are an ideal development direction in the future. Since the whole vehicle system requires a large number of high-power electrical devices, these devices need water cooling. The cooling system of the power system in the prior art is generally designed for only a few components, so it is necessary to design multiple cooling systems to achieve cooling of the entire power system. The prior art has defects such as unreasonable cooling system structure layout and poor cooling effect.

[0003] Therefore, it is necessary to improve the cooling system of the existing power system to meet the cooling requirements of multiple high-power components and improve the cooling effect. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art and to provide a cooling system and control method for a hydrogen fuel cell vehicle power system with a reasonable layout and good cooling effect.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A power system of a hydrogen fuel cell vehicle with a cooling component, the power system comprising a first branch formed by connecting a supercapacitor, a DC / DC converter and a fuel cell DC converter in series through pipelines, and a second branch formed by connecting a motor controller and a motor in series through pipelines; a liquid inlet end of the first branch is connected to a liquid outlet end of the cooling component through a first pipeline, and a liquid outlet end of the first branch is connected to a liquid inlet end of the cooling component through a second pipeline; the second branch is connected to both ends of the first branch in parallel, and a water pump is provided on the second pipeline.

[0007] Preferably, the cooling component includes an expansion water tank and a radiator, the liquid inlet end of the first branch is connected to the liquid outlet end of the expansion water tank through the first pipeline, and the liquid inlet end of the first branch is connected to the liquid outlet end of the cooling component through the second pipeline; the radiator is connected in parallel to the liquid inlet end and the liquid outlet end of the expansion water tank, and an electronic fan is provided next to the radiator.

[0008] Preferably, the supercapacitor is connected to the first pipeline through a pipeline, and the motor controller is connected to the first pipeline through a pipeline.

[0009] Preferably, the second pipeline is provided with a temperature sensor, and the fourth pipeline is located between the temperature sensor and the expansion water tank.

[0010] Preferably, a first valve is provided on the first branch, and the first valve is located between the first pipeline and the supercapacitor; a second valve is provided on the second branch, and the second valve is located between the first pipeline and the motor controller.

[0011] Preferably, a first pressure sensor is provided on the first branch, and the first pressure sensor is located between the first valve and the supercapacitor; a second pressure sensor is provided on the second branch, and the second pressure sensor is located between the second valve and the motor controller.

[0012] Preferably, a first flow meter is provided on the first branch, and the first flow meter is located between the fuel cell DC converter and the second pipeline; a second flow meter is provided on the second branch, and the second flow meter is located between the motor and the second pipeline.

[0013] Preferably, the first valve and the second valve are both solenoid valves; the cooling system also includes a controller, and the first valve, the second valve, the temperature sensor, the first pressure sensor, the second pressure sensor, the first flow meter, the second flow meter, the water pump, and the electronic fan are all electrically connected to the controller.

[0014] Preferably, the controller includes a data detection module, a data analysis module, a valve control module, a water pump control module, and a fan control module; the data detection module is electrically connected to the data analysis module, and the data analysis module is electrically connected to the valve control module, the water pump control module, and the fan control module, respectively; the data detection module is electrically connected to the temperature sensor, the first pressure sensor, the second pressure sensor, the first flow meter, and the second flow meter, respectively; the valve control module is electrically connected to the first valve and the second valve, respectively; the water pump control module is electrically connected to the water pump; and the fan control module is electrically connected to the electronic fan.

[0015] A control method for a power system of a hydrogen fuel cell vehicle with a cooling assembly as described above, the specific control process is as follows:

[0016] The temperature sensor sends the detected temperature data, the first pressure sensor and the second pressure sensor send the detected pressure data, and the first flow meter and the second flow meter send the detected flow data to the controller in real time;

[0017] When the temperature of the second pipeline is higher than a certain temperature setting value, the controller turns on the water pump and the electronic fan to cool the first branch and the second branch; at the same time, the controller controls the pressure of the first branch within the first pressure setting value range and the flow of the first branch within the first flow setting value range by controlling the opening of the first valve and the second valve and the speed of the water pump; controls the pressure of the second branch within the second pressure setting value range and the flow of the second branch within the second flow setting value range.

[0018] The present invention discloses a power system and control method for a hydrogen fuel cell vehicle with a cooling component. The power system includes a first branch formed by connecting a supercapacitor, a DC / DC converter and a fuel cell DC converter in series through pipelines, and a second branch formed by connecting a motor controller and a motor in series through pipelines; the liquid inlet end of the first branch is connected to the liquid outlet end of the cooling component through a first pipeline, and the liquid outlet end of the first branch is connected to the liquid inlet end of the cooling component through a second pipeline; the second branch is connected to both ends of the first branch, and a water pump is provided on the second pipeline. The power system of the present invention includes a first branch formed by connecting a supercapacitor, a DC / DC converter and a fuel cell DC converter in series, and a second branch formed by connecting a motor controller and a motor in series, so that the cooling component can cool the two branches separately, and can cool the first branch and the second branch. The cooling component and the power system are arranged reasonably, and can meet the independent cooling requirements of different components in the power system, and the cooling effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a power system with a cooling assembly for a hydrogen fuel cell vehicle according to an embodiment of the present invention;

[0020] Figure 2 The present invention is a control principle block diagram of a power system of a hydrogen fuel cell vehicle with a cooling component according to an embodiment of the present invention.

[0021] Description of the markings in the figure:

[0022] 1. Power system; 2. Cooling component; 3. Supercapacitor; 4. DC / DC converter; 5. Fuel cell DC converter; 6. First branch; 7. Motor controller; 8. Motor; 9. Second branch; 10. First pipeline; 11. Second pipeline; 12. Water pump; 13. Expansion tank; 14. Radiator; 15. Electronic fan; 16. Temperature sensor; 17. First valve; 18. Second valve; 19. First pressure sensor; 20. Second pressure sensor; 21. First flow meter; 22. Second flow meter; 23. Controller; 24. Data detection module; 25. Data analysis module; 26. Valve control module; 27. Water pump control module; 28. Fan control module. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] Example 1

[0025] like Figure 1 As shown, a power system of a hydrogen fuel cell vehicle with a cooling component, the power system 1 includes a first branch 6 formed by connecting a supercapacitor 3, a DC / DC converter 4 and a fuel cell DC converter 5 in series through pipelines, and a second branch 9 formed by connecting a motor controller 7 and a motor 8 in series through pipelines; the liquid inlet end of the first branch 6 is connected to the liquid outlet end of the cooling component 2 through a first pipeline 10, and the liquid outlet end of the first branch 6 is connected to the liquid inlet end of the cooling component 2 through a second pipeline 11; the second branch 9 is connected to both ends of the first branch 6 in parallel, and a water pump 12 is provided on the second pipeline 11.

[0026] The present invention discloses a power system and control method for a hydrogen fuel cell vehicle with a cooling component. The power system includes a first branch formed by connecting a supercapacitor, a DC / DC converter and a fuel cell DC converter in series through pipelines, and a second branch formed by connecting a motor controller and a motor in series through pipelines; the liquid inlet end of the first branch is connected to the liquid outlet end of the cooling component through a first pipeline, and the liquid outlet end of the first branch is connected to the liquid inlet end of the cooling component through a second pipeline; the second branch is connected to both ends of the first branch, and a water pump is provided on the second pipeline. The power system of the present invention includes a first branch formed by connecting a supercapacitor, a DC / DC converter and a fuel cell DC converter in series, and a second branch formed by connecting a motor controller and a motor in series, so that the cooling component can cool the two branches separately, and can cool the first branch and the second branch. The cooling component and the power system are arranged reasonably, and can meet the independent cooling requirements of different components in the power system, and the cooling effect is good.

[0027] There can be many types of cooling components 2, which are not limited here. The cooling component 2 in this embodiment may include an expansion water tank 13 and a radiator 14. The liquid inlet end of the first branch 6 is connected to the liquid outlet end of the expansion water tank 13 through the first pipeline 10, and the liquid inlet end of the first branch 6 is connected to the liquid outlet end of the cooling component 2 through the second pipeline 11; the radiator 14 is connected to the liquid inlet end and the liquid outlet end of the expansion water tank 13 in parallel, and an electronic fan 15 can be provided next to the radiator 14. By turning on the electronic fan 15, the heat dissipation effect of the radiator 14 can be accelerated.

[0028] Since the supercapacitor 3 has high cooling requirements, the supercapacitor 3 can be connected to the first pipeline 10 through a pipeline, so that the supercapacitor 3 is arranged at a position closest to the liquid outlet of the water pump 12, which can meet the cooling needs of the supercapacitor 3; since the motor controller 7 has high cooling requirements, the motor controller 7 can be connected to the first pipeline 10 through a pipeline, so that the motor controller 7 is arranged at a position closest to the liquid outlet of the water pump 12, which can meet the cooling needs of the supercapacitor 3.

[0029] The second pipeline 11 may be provided with a temperature sensor 16 to detect the temperature of the liquid in the second pipeline 11 .

[0030] A first valve 17 may be provided on the first branch 6, and the first valve 17 may be located between the first pipeline 10 and the supercapacitor 3. By adjusting the opening of the first valve 17, the pressure and flow of the first branch 6 may be controlled, and excessive pressure may be prevented from causing damage to the electrical components in the first branch 6. A second valve 18 may be provided on the second branch 9, and the second valve 18 may be located between the first pipeline 10 and the motor controller 7. By adjusting the opening of the second valve 18, the pressure and flow of the second branch 9 may be controlled, and excessive pressure may be prevented from causing damage to the electrical components in the second branch 9.

[0031] A first pressure sensor 19 may be provided on the first branch 6 to detect the pressure of the first branch 6, and the first pressure sensor 19 may be located between the first valve 17 and the supercapacitor 3; a second pressure sensor 20 may be provided on the second branch 9 to detect the pressure of the second branch 9, and the second pressure sensor 20 may be located between the second valve 18 and the motor controller 7.

[0032] A first flow meter 21 may be provided on the first branch 6 to detect the flow of the first branch 6, and the first flow meter 21 may be located between the fuel cell DC converter 5 and the second pipeline 11; a second flow meter 22 may be provided on the second branch 9 to detect the flow of the first branch 6, and the second flow meter 22 may be located between the motor 8 and the second pipeline 11.

[0033] To realize the automatic control function, the first valve 17 and the second valve 18 can both be solenoid valves; the cooling system can also include a controller 23, and the first valve 17, the second valve 18, the temperature sensor 16, the first pressure sensor 19, the second pressure sensor 20, the first flow meter 21, the second flow meter 22, the water pump 12 and the electronic fan 15 can all be electrically connected to the controller 23.

[0034] like Figure 2As shown, the controller 23 may include a data detection module 24, a data analysis module 25, a valve control module 26, a water pump control module 27, and a fan control module 28; the data detection module 24 may be electrically connected to the data analysis module 25, and the data analysis module 25 may be electrically connected to the valve control module 26, the water pump control module 27, and the fan control module 28, respectively; the data detection module 24 may be electrically connected to the temperature sensor 16, the first pressure sensor 19, the second pressure sensor 20, the first flow meter 21, and the second flow meter 22, respectively; the valve control module 26 may be electrically connected to the first valve 17 and the second valve 18, respectively; the water pump control module 27 may be electrically connected to the water pump 12; and the fan control module 28 may be electrically connected to the electronic fan 15.

[0035] A control method for a power system of a hydrogen fuel cell vehicle with a cooling component, the specific control process is as follows:

[0036] The temperature sensor 16 sends the detected temperature data, the first pressure sensor 19 and the second pressure sensor 20 send the detected pressure data, and the first flow meter 21 and the second flow meter 22 send the detected flow data to the data detection module 24 in real time; the data detection module 24 sends the detected data to the data analysis module 25;

[0037] When the data analysis module 25 analyzes that the temperature of the second pipeline 11 is higher than a certain temperature setting value, the data analysis module 25 sends instructions to the water pump control module 27 and the fan control module 28, the water pump control module 27 turns on the water pump 12, and the fan control module 28 turns on the electronic fan 15 to cool down the first branch 6 and the second branch 9;

[0038] At the same time, the data analysis module 25 sends instructions to the valve control module 26. The valve control module 26 controls the pressure of the first branch 6 within the first pressure setting value range and the flow of the first branch 6 within the first flow setting value range by controlling the opening of the first valve 17 and the second valve 18 and the speed of the water pump 12; controls the pressure of the second branch 9 within the second pressure setting value range and the flow of the second branch 9 within the second flow setting value range.

[0039] For matters not mentioned above, the prior art applies.

[0040] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art to which the present invention belongs may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the present invention or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the present invention.

Claims

1. A power system with a cooling assembly for a hydrogen fuel cell vehicle, characterized in that: The power system (1) comprises a first branch (6) formed by connecting a supercapacitor (3), a DC / DC converter (4) and a fuel cell DC converter (5) in series via a pipeline, and a second branch (9) formed by connecting a motor controller (7) and a motor (8) in series via a pipeline; the liquid inlet end of the first branch (6) is connected to the liquid outlet end of the cooling component (2) via a first pipeline (10), and the liquid outlet end of the first branch (6) is connected to the liquid inlet end of the cooling component (2) via a second pipeline (11); the second branch (9) is connected in parallel to both ends of the first branch (6), and a water pump (12) is provided on the second pipeline (11); The cooling assembly (2) comprises an expansion water tank (13) and a radiator (14); the liquid inlet end of the first branch (6) is connected to the liquid outlet end of the expansion water tank (13) through the first pipeline (10), and the liquid outlet end of the first branch (6) is connected to the liquid outlet end of the cooling assembly (2) through the second pipeline (11); the radiator (14) is connected in parallel to the liquid inlet end and the liquid outlet end of the expansion water tank (13), and an electronic fan (15) is provided next to the radiator (14); The supercapacitor (3) is in communication with the first pipeline (10) through a pipeline, and the motor controller (7) is in communication with the first pipeline (10) through a pipeline; The second pipeline (11) is provided with a temperature sensor (16); The first branch (6) is provided with a first valve (17), and the first valve (17) is located between the first pipeline (10) and the supercapacitor (3); the second branch (9) is provided with a second valve (18), and the second valve (18) is located between the first pipeline (10) and the motor controller (7); The first branch (6) is provided with a first pressure sensor (19), and the first pressure sensor (19) is located between the first valve (17) and the supercapacitor (3); the second branch (9) is provided with a second pressure sensor (20), and the second pressure sensor (20) is located between the second valve (18) and the motor controller (7); A first flow meter (21) is provided on the first branch (6), and the first flow meter (21) is located between the fuel cell DC converter (5) and the second pipeline (11); a second flow meter (22) is provided on the second branch (9), and the second flow meter (22) is located between the motor and the second pipeline (11); The control method of the power system of the hydrogen fuel cell vehicle with cooling assembly, the specific control process is as follows: The temperature sensor (16) sends the detected temperature data, the first pressure sensor (19) and the second pressure sensor (20) send the detected pressure data, and the first flow meter (21) and the second flow meter (22) send the detected flow data to the controller (23) in real time; When the temperature of the second pipeline (11) is higher than a certain temperature setting value, the controller (23) turns on the water pump (12) and the electronic fan (15) to cool the first branch (6) and the second branch (9); at the same time, the controller (23) controls the opening of the first valve (17) and the second valve (18) and the rotation speed of the water pump (12) to control the pressure of the first branch (6) within a first pressure setting value range and the flow rate of the first branch (6) within a first flow rate setting value range; and controls the pressure of the second branch (9) within a second pressure setting value range and the flow rate of the second branch (9) within a second flow rate setting value range.

2. A hydrogen fuel cell vehicle power system with a cooling assembly as claimed in claim 1, characterized in that: The first valve (17) and the second valve (18) are both solenoid valves; the cooling assembly (2) also includes a controller (23); the first valve (17), the second valve (18), a temperature sensor (16), a first pressure sensor (19), a second pressure sensor (20), a first flow meter (21), a second flow meter (22), a water pump (12), and an electronic fan (15) are all electrically connected to the controller (23).

3. A power system with a cooling assembly for a hydrogen fuel cell vehicle as claimed in claim 2, characterized in that: The controller (23) comprises a data detection module (24), a data analysis module (25), a valve control module (26), a water pump control module (27), and a fan control module (28); the data detection module (24) is electrically connected to the data analysis module (25), and the data analysis module (25) is electrically connected to the valve control module (26), the water pump control module (27), and the fan control module (28); the data detection module (24) is electrically connected to the temperature sensor (16), the first pressure sensor (19), the second pressure sensor (20), the first flow meter (21), and the second flow meter (22); the valve control module (26) is electrically connected to the first valve (17) and the second valve (18), respectively; the water pump control module (27) is electrically connected to the water pump (12); and the fan control module (28) is electrically connected to the electronic fan (15).

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