Multifunctional controller of fuel cell system and automobile

Abstract

The utility model discloses a multifunctional controller of a fuel cell system and an automobile, the multifunctional controller fixes a hydrogen pump controller and an FCU in a controller shell, the controller shell is provided with an FCU low-voltage interface connected with the FCU, and the FCU low-voltage interface is used for connecting a VCU of the automobile and BOP parts of the fuel cell system. The controller shell is provided with a high-voltage alternating-current connector connected with a hydrogen pump controller, the high-voltage alternating-current connector is used for being connected with a hydrogen pump of a vehicle, the controller shell is provided with a high-voltage direct-current connector connected with the hydrogen pump controller, and the high-voltage direct-current connector is used for being connected with a DC / DC converter of the vehicle. The fuel cell controller adopts a high-low voltage controller function integration scheme, the cost is reduced, the size of a fuel cell system is reduced, and the structural design flexibility of the fuel cell system is improved through the integrated design of the hydrogen pump controller and the FCU.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and particularly relates to a multifunctional controller for a fuel cell system. Background Art

[0002] As a new energy technology, fuel cells have environmental friendliness that cannot be compared with pure electric energy and have great development potential in the future; with the continuous progress of engineering technology, the structure of fuel cell systems is also moving towards miniaturization, high power, and high integration.

[0003] At present, the integration scheme on fuel cell systems is mostly the integration of the DC / DC converter function, such as the internal integration of an air compressor, DCL, etc. in the DC / DC; for example, the published document with the publication number CN 112600421A, the publication date of April 2, 2021, and the patent name of "A Hydrogen Fuel Cell DC-DC Converter Device and Current Control Method" discloses a hydrogen fuel cell DC-DC converter device and current control method. The branch current acquisition module is responsible for acquiring the real-time current of each phase branch and transmitting it to the DSP controller module. The branch current acquisition module, the first voltage and current sampling and short-circuit monitoring module, and the second voltage and current sampling and short-circuit monitoring module are all electrically connected to the input end of the DSP controller module, and the output end of the DSP controller module is electrically connected to the input end of the energy storage element and the power isolation switch tube module through the isolation switch tube drive module; the first voltage and current sampling and short-circuit monitoring module and the second current sampling and short-circuit monitoring module are respectively responsible for acquiring the input end voltage and current and the output end voltage and current, and are also responsible for real-time monitoring of the input and output end currents.

[0004] Similar DC / DC converters are restricted by the physical volume limitation. After integrating other components into the DC / DC converter, since the overall volume will become larger, it is not conducive to the system layout, so other components cannot be integrated anymore.

[0005] The fuel cell system controller (FCU) on the engine has a relatively single function and does not integrate other controllers. The functions of other components such as a hydrogen pump controller can be considered to be integrated inside the FCU to further simplify the volume of the fuel cell system; there is no such integration scheme for fuel cell systems on the market at present. Summary of the Invention

[0006] The technical problem to be solved by the utility model is to realize a multifunctional controller for a fuel cell system with high integration.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multifunctional controller of a fuel cell system, the multifunctional controller fixes the hydrogen pump controller and the FCU in the controller housing, the controller housing is provided with an FCU low-pressure interface connected to the FCU, the FCU low-pressure interface is used to connect the vehicle's VCU and the fuel cell system BOP components, the controller housing is provided with a high-voltage AC connector connected to the hydrogen pump controller, the high-voltage AC connector is used to connect the hydrogen pump of the fuel cell system, the controller housing is provided with a high-voltage DC connector connected to the hydrogen pump controller, the high-voltage DC connector is used to connect the vehicle's DC / DC converter.

[0008] The controller housing is provided with an identification area for marking information, and the marking information includes the product model, production date, and software version number information.

[0009] The controller housing is a metal housing, and a grounding point for grounding is provided on the controller housing.

[0010] The controller housing is provided with protruding heat dissipation fins, and two independent cavities are provided in the controller housing. The hydrogen pump controller and the FCU are fixed in the independent cavities and are in contact with the inner wall of the controller housing.

[0011] The controller housing is fixed with fixing feet for fixing it to the fuel cell system in the vehicle, and the fixing feet are provided with mounting holes.

[0012] The controller housing is formed by buckling a bottom plate and a cover plate, the fixing legs are fixed on the bottom plate, the heat dissipation fins are metal strips arranged at equal intervals, and the heat dissipation fins are fixed on the cover plate.

[0013] A car, wherein a fuel cell stack of the car is connected to a high-voltage power distribution box of the whole car via an all-in-one DC / DC converter, a power supply line of the all-in-one DC / DC converter is connected to a high-voltage DC connector of a multi-function controller, a VCU and fuel cell system BOP components of the car are connected to an FCU low-voltage interface of the multi-function controller via a signal line, and an input end of a hydrogen pump of the car is connected to a high-voltage AC connector of the multi-function controller.

[0014] The all-in-one DC / DC converter integrates DCF, PDU and ACP functions, and the whole vehicle high-voltage distribution box is respectively connected to the vehicle's power battery and the whole vehicle's all-in-one motor controller.

[0015] The fuel cell controller of the utility model adopts a high and low voltage controller function integration solution to reduce costs and reduce the volume of the fuel cell system. By integrating the hydrogen pump controller with the FCU, the flexibility of the fuel cell system structure design is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a brief description of the content expressed in each attached drawing in the specification of the present utility model and the markings in the drawings:

[0017] Figure 1 It is the high-voltage electrical architecture of the fuel cell system;

[0018] Figures 2-5 It is the structural schematic diagram of the multi-functional controller;

[0019] The markings in the above-mentioned drawings are all: 1. Identification area; 2. Cover plate; 3. Heat dissipation fins; 4. Grounding point; 5. Fixed feet; 6. High-voltage DC connector; 7. High-voltage AC connector; 8. Controller housing; 9. FCU low-voltage interface. Specific embodiments

[0020] The following is a further detailed description with reference to the attached drawings through the description of the embodiments. The specific embodiments of the present utility model, such as the shapes, structures of the various components involved, the mutual positions and connection relationships between the various parts, the functions and working principles of each part, the manufacturing process, and the operation and use methods, are further described in detail to help those skilled in the art have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present utility model.

[0021] The multi-functional controller of the fuel cell system is provided with a metal controller housing 8, and the FCU and hydrogen pump controller are integrated inside it, improving the flexibility of the fuel cell system structure design. The original connection relationship between the FCU and the hydrogen pump controller remains unchanged, and some functional modules can share circuit boards, housings, transistors, capacitors, resistors, etc. to achieve function integration, and reasonable arrangements can be made here according to vehicle models and configurations, etc.

[0022] Compared with the traditional scheme in which the FCU and the hydrogen pump controller are arranged dispersedly, this scheme can further improve the integration degree of the system. The multi-functional controller is externally configured with DC high-voltage input, AC high-voltage output, and low-voltage output interfaces. Among them, the high-voltage input interface is connected to the high-voltage distribution bus of the DC / DC converter; the AC high-voltage output is connected to the hydrogen pump to provide three-phase alternating current for the operation of the hydrogen pump motor; the low-voltage output interface provides signal control for each component of the fuel cell system and is connected to the VCU to receive control instructions from the whole vehicle. Considering the problem that the original DC / DC converter of the fuel cell system has too many integrated functions, resulting in limited integration layout of the whole vehicle, after adopting the scheme of the present invention, the flexibility of the fuel cell system integration layout is improved, and at the same time, cost reduction is achieved.

[0023] The controller housing 8 is a metal housing, which can not only shield electromagnetic interference, but also help to transfer internal heat. Two independent cavities are provided in the controller housing 8. The hydrogen pump controller and FCU are fixed in independent cavities and in contact with the inner wall of the controller housing 8. Insulating heat-conductive materials can be filled in the gap. The controller housing 8 is formed by a base plate and a cover plate 2 that are snapped together. The fixing feet 5 are fixed on the base plate. The fixing feet 5 are provided with mounting holes. The fixing feet 5 are used to fix the controller housing 8 on the fuel cell system in the vehicle. The heat sink fins 3 are fixed on the cover plate 2. The heat sink fins 3 are metal strips arranged at equal intervals. It is preferred to provide an electric air-cooled heat dissipation device next to the controller housing 8 to improve the heat dissipation effect of the heat sink fins 3. The controller housing 8 also needs to be connected to the ground through the grounding point 4.

[0024] The controller housing 8 is provided with an identification area 1 for marking information. The identification area 1 can be fixed with a product nameplate for marking the product model, production date, software version number and other information; since this controller is a high- and low-voltage integration, a high-voltage mark is also required above the components to remind personnel of the safety protection against electric shock.

[0025] The high-voltage power supply enters from the high-voltage DC connector 6, is converted into three-phase AC power internally, and then output to the outside through the high-voltage AC connector 7 to power components such as the hydrogen pump; the control signal is output to the outside through the FCU low-voltage interface 9.

[0026] For a car equipped with a multi-function controller, the battery stack of the car is connected to the high-voltage distribution box of the whole vehicle through an all-in-one DC / DC converter, and the power supply line of the all-in-one DC / DC converter is connected to the high-voltage DC connector 6 of the multi-function controller. The all-in-one DC / DC converter integrates DCF, PDU, and ACP functions, and the high-voltage distribution box of the whole vehicle is respectively connected to the power battery of the car and the all-in-one motor controller of the whole vehicle. The VCU and fuel cell system BOP components of the car are connected to the FCU low-voltage interface 9 of the multi-function controller through signal lines, and the input end of the hydrogen pump of the car is connected to the high-voltage AC connector 7 of the multi-function controller.

[0027] This solution can further improve the system integration. The multifunctional controller is externally configured with DC high-voltage input, AC high-voltage output and low-voltage output interfaces. The high-voltage input interface is connected to the high-voltage distribution bus of the DC / DC converter; the AC high-voltage output is connected to the hydrogen pump to provide three-phase AC power for the hydrogen pump motor; the low-voltage output interface provides signal control for various components of the fuel cell system, and is connected to the VCU to receive control instructions from the vehicle.

[0028] Through the creation and application of the utility model, a new solution can be provided for the integration of fuel cell system components, and the physical structure of the system can be simplified to a certain extent.

[0029] The present invention has been described by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A multi-functional controller for a fuel cell system, characterized in that: The multifunctional controller fixes the hydrogen pump controller and the FCU in the controller housing. The controller housing is provided with an FCU low-pressure interface connected to the FCU, and the FCU low-pressure interface is used to connect the vehicle's VCU and the fuel cell system BOP components. The controller housing is provided with a high-voltage AC connector connected to the hydrogen pump controller, and the high-voltage AC connector is used to connect the vehicle's hydrogen pump. The controller housing is provided with a high-voltage DC connector connected to the hydrogen pump controller, and the high-voltage DC connector is used to connect the vehicle's DC / DC converter.

2. The multifunctional controller according to claim 1, wherein: The controller housing is provided with an identification area for marking information, and the marking information includes the product model, production date, and software version number information.

3. The multifunctional controller according to claim 1 or 2, characterized in that: The controller housing is a metal housing, and a grounding point for grounding is provided on the controller housing.

4. The multifunctional controller according to claim 3, characterized in that: The controller housing is provided with protruding heat dissipation fins, and two independent cavities are provided in the controller housing. The hydrogen pump controller and the FCU are fixed in the independent cavities and are in contact with the inner wall of the controller housing.

5. The multifunctional controller according to claim 4, characterized in that: The controller housing is fixed with fixing feet for fixing it to the fuel cell system in the vehicle, and the fixing feet are provided with mounting holes.

6. The multifunctional controller according to claim 5, characterized in that: The controller housing is formed by buckling a bottom plate and a cover plate, the fixing legs are fixed on the bottom plate, the heat dissipation fins are metal strips arranged at equal intervals, and the heat dissipation fins are fixed on the cover plate.

7. An automobile for the multifunctional controller according to any one of claims 1-6, wherein the fuel cell stack is connected to the vehicle high-voltage power distribution box through an all-in-one DC / DC converter, and is characterized in that: The power supply line of the all-in-one DC / DC converter is connected to the high-voltage DC connector of the multi-function controller, the VCU of the vehicle and the BOP components of the fuel cell system are connected to the FCU low-voltage interface of the multi-function controller through signal lines, and the input end of the hydrogen pump of the fuel cell system is connected to the high-voltage AC connector of the multi-function controller.

8. The automobile according to claim 7, characterized in that: The all-in-one DC / DC converter integrates DCF, PDU, and ACP functions, and the whole vehicle high-voltage distribution box is respectively connected to the vehicle's power battery and the whole vehicle's all-in-one motor controller.

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