Fuel cell system and assembling method

Abstract

The invention provides a fuel cell system and an assembling method, and belongs to the technical field of fuel cells. The electric pile assembly is arranged on the system frame; the system auxiliary assembly comprises an air system structure arranged on the system frame, a hydrothermal system structure arranged on the system frame and a hydrogen system structure arranged on the system frame; the direct-current converter is arranged on the system frame; and the control assembly is arranged on the system frame, the control assembly comprises a pressure boosting module, a pressure reducing module, an air compressor controller, a water pump module, a PTC controller and a radiator controller, and the control assembly is arranged on the rear side of the system frame. According to the fuel cell system and the assembly method provided by the invention, modular design is adopted, system parts are integrated, the integration level is high, and assembly and maintenance are easy. And a plurality of controllers are integrated into the control assembly, so that the problem of low integration level of a plurality of shells of a plurality of controllers is solved, and the integration level and the reliability of the fuel cell are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cells. Specifically, it relates to a fuel cell system and an assembly method, and more specifically, it is designed to provide a highly integrated fuel cell system and an assembly method. Background Art

[0002] Fuel cells, as an electrochemical conversion device (power generation device) that directly converts chemical energy into electrical energy, have been widely used. Fuel cells have the characteristics of being clean and pollution-free, and having high energy conversion efficiency, and are an important development direction in fields such as new energy vehicles.

[0003] Currently, with the increasing power demand of fuel cells, the volume of fuel cells is getting larger and larger. Moreover, there are a variety of current fuel cell control system controllers with low integration, resulting in increased maintenance difficulty and reduced reliability of existing fuel cells.

[0004] Therefore, promoting the innovative development of fuel cell technology has important development significance. Summary of the Invention

[0005] The purpose of the present invention is to provide a fuel cell system and an assembly method, aiming to solve the technical problem of low reliability existing in the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a fuel cell system, including:

[0007] A system framework;

[0008] A stack assembly, disposed on the system framework;

[0009] System auxiliary components, including an air system structure disposed on the system framework, a water and heat system structure disposed on the system framework, and a hydrogen system structure disposed on the system framework;

[0010] A DC converter, disposed on the system framework;

[0011] A control component, disposed on the system framework. The control component includes a boost module, a buck module, and an air compressor controller electrically connected to the air system structure, a water pump module, a PTC controller, and a radiator controller electrically connected to the water and heat system structure. The control component is disposed at the rear side of the system framework.

[0012] Preferably, the air system structure includes:

[0013] An air compressor, disposed at the bottom of the system framework;

[0014] A bypass valve, disposed at the bottom of the system framework;

[0015] An intercooler, which is arranged at the bottom of the system framework;

[0016] An air cleaner, which is arranged at the bottom of the system framework.

[0017] Preferably, the hydrothermal system structure includes:

[0018] A water filter, which is arranged on the system framework;

[0019] A deionization device, which is arranged on the system framework;

[0020] A water pump, which is connected to the system framework and is located on the left side of the air system structure;

[0021] A heater, which is connected to the system framework and is located on the left side of the air system structure.

[0022] Preferably, the hydrogen system structure includes:

[0023] A pressure reducing valve, which is arranged on the system framework;

[0024] A filter, which is arranged on the system framework;

[0025] A hydrogen circulation pump, which is arranged on the system framework.

[0026] Preferably, the hydrogen system structure further includes:

[0027] A radiator, which is connected to at least any one of the pressure reducing valve, the filter and the hydrogen circulation pump.

[0028] Preferably, the stack assembly is arranged on the side of the system framework.

[0029] Preferably, the DC converter is arranged on the upper end face of the system framework.

[0030] Preferably, the system framework is detachably connected to one or more of the stack assembly, the system auxiliary assembly, the DC converter and the control assembly.

[0031] Preferably, the system framework is composed of multiple plate bodies detachably connected.

[0032] The present invention also provides an assembly method for a fuel cell system, which is characterized by including the following steps:

[0033] Prepare the stack assembly, the system auxiliary assembly, the DC converter and the control assembly modules respectively;

[0034] Complete the assembly of the system framework;

[0035] Install the four modules of the stack assembly, system auxiliary assembly, DC converter, and control assembly on the system framework in sequence.

[0036] The beneficial effects of a fuel cell system and an assembly method provided by the present invention are as follows: Compared with the prior art, the fuel cell system of the present invention adopts a modular design, integrates system components, has a high degree of integration, is easy to assemble and maintain, and components with high failure rates can be directly disassembled for maintenance or replacement. Integrating many controllers into the control assembly eliminates the problem of low integration of multiple controllers in multiple housings, improving the integration and reliability of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is a block diagram of the connection relationship between the control assembly and other structures adopted by a fuel cell system provided by an embodiment of the present invention;

[0039] Figure 2 It is a schematic structure of a fuel cell system provided by an embodiment of the present invention Figure 1 ;

[0040] Figure 3 It is a schematic structure of a fuel cell system provided by an embodiment of the present invention Figure 2 .

[0041] In the figure: 1, system framework; 2, stack assembly; 3, system auxiliary assembly; 31, air system structure; 311, air compressor; 312, intercooler; 32, water and heat system structure; 321, water pump; 322, heater; 33, hydrogen system structure; 331, hydrogen circulation pump; 332, step-down proportional valve; 333, one-way filter valve; 4, DC converter; 5, control assembly; 51, boost module; 52, buck module; 53, air compressor controller; 54, water pump module; 55, PTC controller; 56, radiator controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present invention clearer, the following further details the present invention with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] Please refer toFigures 1 to 3 , a fuel cell system provided by the present invention will be described below. The fuel cell system includes a system frame 1, a stack assembly 2, a system auxiliary assembly 3, a DC converter 4, and a control assembly 5. The stack assembly 2 is disposed on the system frame 1; the system auxiliary assembly 3 includes an air system structure 31 disposed on the system frame 1, a hydrothermal system structure 32 disposed on the system frame 1, and a hydrogen system structure 33 disposed on the system frame 1; the DC converter 4 is disposed on the system frame 1; the control assembly 5 is disposed on the system frame 1, and the control assembly 5 includes a boost module 51, a buck module 52, and an air compressor controller 53 electrically connected to the air system structure 31, a water pump module 54, a PTC controller 55, and a radiator controller 56 electrically connected to the hydrothermal system structure 32. The control assembly 5 is disposed at the rear side of the system frame 1.

[0044] The operation process of assembling the fuel cell system is as follows: First, the stack assembly 2, the system auxiliary assembly 3, the DC converter 4, and the control assembly 5 are prepared in advance. Then, the assembly of the system frame 1 is completed. Then, the stack assembly 2, the system auxiliary assembly 3, the DC converter 4, and the control assembly 5 are respectively installed on the system frame 1.

[0045] Compared with the prior art, the fuel cell system provided by the present invention adopts a modular design, integrates system components, has a high degree of integration, is easy to assemble and maintain, and components with high failure rates can be directly disassembled for repair or replacement. Integrating a large number of controllers into the control assembly 5 eliminates the problem of low integration of multiple controllers in multiple housings, improving the integration and reliability of the fuel cell.

[0046] As a specific implementation manner of an embodiment of the present invention, please refer to Figures 1 to 3 , the air system structure 31 includes: an air compressor, a bypass valve, an intercooler, and an air filter. The air compressor 311 is disposed at the bottom of the system frame 1; the bypass valve is disposed at the bottom of the system frame 1; the intercooler 312 is disposed at the bottom of the system frame 1; the air filter is disposed at the bottom of the system frame 1.

[0047] As a specific implementation manner of an embodiment of the present invention, please refer to Figures 1 to 3, the hydrothermal system structure 32 includes: a water path filter, a deionization device, an electronic water pump 321, and a heater 322. The water path filter is arranged on the system frame 1; the deionization device is arranged on the system frame 1; the water pump (i.e., the electronic water pump) 321 is connected to the system frame 1, and the water pump 321 is located on the left side of the air system structure 31; the heater 322 is connected to the system frame 1, and the heater 322 is located on the left side of the air system structure 31. The water path filter and the deionization device are installed at the water inlet end of the fuel cell and are used to filter out impurities in the coolant when replenishing the coolant. The deionization device is installed after the water path filter. The electronic water pump 321 is connected between the radiator and the fuel cell to form a coolant circulation loop, and the temperature control of the fuel cell system is achieved by controlling the rotation speed of the electronic water pump 321 and the rotation speed of the radiator; the heater 322 is connected in parallel with the radiator through a branch pipe and is used for cold start in a low-temperature environment on the side branch of the main cooling water path.

[0048] As a specific implementation manner of an embodiment of the present invention, please refer to Figures 1 to 3 , the hydrogen system structure 33 includes: a step-down proportional valve 332, a filter, and a hydrogen circulation pump 331. The step-down proportional valve 332 is arranged on the system frame 1; the filter is arranged on the system frame 1; the hydrogen circulation pump 331 is arranged on the system frame 1.

[0049] Hydrogen enters the step-down proportional valve 332 through the one-way filter valve 333 and then enters the hydrogen fuel cell stack, i.e., the stack assembly 2, to provide fuel for the fuel cell. The step-down proportional valve 332 controls the pressure of the hydrogen inlet by setting the opening degrees of the inlet and outlet. The unconsumed hydrogen entering the fuel cell enters the hydrogen circulation pump through the hydrogen outlet of the stack and is recycled back to the inlet through cyclic pressurization. To ensure the normal operation of the hydrogen circulation pump, a radiator is separately connected, and this small radiator is used to cool components including a DC converter, an intercooler, and the hydrogen circulation pump.

[0050] In this embodiment, the hydrogen system structure 33 further includes a radiator, and the radiator is connected to at least any one of the step-down valve, the filter, and the hydrogen circulation pump 331.

[0051] As a specific implementation manner of an embodiment of the present invention, please refer to Figures 1 to 3 , the stack assembly 2 is arranged on the side of the system frame 1. Arranging the stack assembly 2 on the side of the system frame 1 is beneficial to the voltage inspection of the fuel cell stack assembly 2 to ensure the normal discharge of each unit. On the other hand, it is beneficial to maintenance, and the fault point can be quickly located when a fault or abnormal discharge occurs in the stack assembly 2.

[0052] As a specific implementation manner of an embodiment of the present invention, please refer to Figures 1 to 2, the DC converter 4 is disposed on the upper end surface of the system frame 1. Disposing the DC converter 4 on the upper end surface by using the flat surface of the system frame 1 can make better and more reasonable use of the space. On the other hand, placing it on the upper end surface can ensure the effective heat dissipation of the DC converter 4 and prevent interference with other components.

[0053] As a specific implementation manner of an embodiment of the present invention, please refer to Figures 1 to 2 , the system frame 1 is detachably connected to one or more of the stack assembly 2, the system auxiliary assembly 3, the DC converter 4, and the control assembly 5.

[0054] In this embodiment, the system frame 1 is formed by detachably connecting multiple plate bodies. Specifically, the system frame 1 is composed of a steel frame. Five of the six faces of the system frame 1 are fixed by bolts. Fixing points are provided on both the front and rear sides of the system frame 1 and insulating foot pads are provided. The fixing points are used to connect and fix related components such as a hydrogen circulation pump, a hydrogen ratio valve, an inlet and outlet valve member, and a heater, and the structural design is more centralized.

[0055] The present invention also provides an assembly method for a fuel cell system, which is characterized by including the following steps: respectively completing the preparation work of the four modules of the stack assembly 2, the system auxiliary assembly 3, the DC converter 4, and the control assembly 5; completing the assembly of the system frame 1; and sequentially installing the four modules of the stack assembly 2, the system auxiliary assembly 3, the DC converter 4, and the control assembly 5 on the system frame 1.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuel cell system, characterized in that: include: System framework; A battery stack assembly is arranged on the system frame; A system auxiliary component, comprising an air system structure disposed on the system frame, a hydrothermal system structure disposed on the system frame, and a hydrogen system structure disposed on the system frame; A DC converter is arranged on the system frame; A control component is arranged on the system frame, and the control component includes a boost module, a buck module, and an air compressor controller electrically connected to the air system structure, and a water pump module, a PTC controller, and a radiator controller electrically connected to the hydrothermal system structure. The control component is arranged on the rear side of the system frame.

2. A fuel cell system according to claim 1, characterized in that: The air system structure includes: An air compressor is arranged at the bottom of the system frame; A bypass valve is arranged at the bottom of the system frame; An intercooler is arranged at the bottom of the system frame; An air filter is arranged at the bottom of the system frame.

3. A fuel cell system according to claim 1, characterized in that: The hydrothermal system structure comprises: A water filter is arranged on the system frame; A deionization device, arranged on the system frame; A water pump connected to the system frame, wherein the water pump is located on the left side of the air system structure; A heater is connected to the system frame, and the heater is located on the left side of the air system structure.

4. A fuel cell system according to claim 1, characterized in that: The hydrogen system structure comprises: A pressure reducing valve, arranged on the system frame; A filter is arranged on the system frame; A hydrogen circulation pump is arranged on the system frame.

5. A fuel cell system according to claim 4, characterized in that: The hydrogen system structure also includes: A radiator is connected to at least any one of the pressure reducing valve, the filter and the hydrogen circulation pump.

6. A fuel cell system according to claim 1, characterized in that: The battery stack assembly is arranged on a side of the system frame.

7. A fuel cell system according to claim 1, characterized in that: The DC converter is arranged on the upper end surface of the system frame.

8. A fuel cell system according to any one of claims 1 to 7, characterized in that: The system frame is detachably connected to one or more of the battery stack assembly, the system auxiliary assembly, the DC converter, and the control assembly.

9. A fuel cell system according to claim 1, characterized in that: The system frame is composed of a plurality of plates which are detachably connected.

10. A method for assembling a fuel cell system, characterized in that: The following steps are involved: Complete the preparation work of the four modules: battery stack components, system auxiliary components, DC converters, and control components; Complete the assembly of the system framework; The four modules of battery stack assembly, system auxiliary assembly, DC converter and control assembly are installed on the system frame in sequence.

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