Pressing machine and pressing assembly for pressing fuel cell stack

Abstract

The present invention provides a press machine for press-fitting a fuel cell stack, which comprises a machine base, a frame, a support, a power device and a press assembly, wherein the power device is configured to provide downward pressure and upward lift to the press assembly, the frame is arranged on the machine base, the support is arranged on the frame, and the power device is arranged on the support, wherein the press assembly is configured to press-fit a fuel cell stack placed between the machine base and the press assembly under the action of the downward pressure provided by the power device.

Description

Technical Field

[0001] The present invention relates to a fuel cell, and more particularly to a press machine for press-assembling a fuel cell stack, wherein the press machine for press-assembling a fuel cell stack of the present invention can press the flow field plates of the fuel cell monomers of the stacked fuel cell stack and the membrane electrode assembly disposed between the flow field plates to ensure the airtightness between the flow field plates and the membrane electrode assembly of the fuel cell. Furthermore, the present invention further provides a press assembly for press-assembling a fuel cell stack. Background Art

[0002] A fuel cell is a power generation device that converts the chemical energy in a fuel directly into electrical energy through an electrochemical reaction. However, a single fuel cell (or fuel cell monomer) can only provide a low voltage and output power. In practical applications, multiple fuel cells are generally stacked together to form a fuel cell stack that can achieve high voltage and high power output. Accordingly, a fuel cell stack of a fuel cell is formed by stacking multiple fuel cell monomers together.

[0003] The fuel cell stack of a fuel cell needs to maintain structural stability during use to ensure that the fuel cell maintains a stable and continuous power output. The fuel cell stack of an existing fuel cell is mostly fixed together by fastening means, such as screw fixing. However, when the fuel cell monomers stacked together are directly fixed together, it is easy to cause uneven force on various parts of the fuel cell stack. Uneven force on various parts of the fuel cell stack may affect the sealing performance and power transmission performance of the fuel cell stack, and ultimately affect the power output of the fuel cell stack. In addition, the uneven force on various parts of the fuel cell stack may also cause the flow field plate of the fuel cell stack to deform due to excessive local force, and even cause damage to the proton exchange membrane, making the fuel cell stack unusable. Therefore, before being fixed, the existing fuel cell stack often needs to be pressed by a press so that the fuel cell monomers of the fuel cell stack are tightly stacked together to ensure the sealing performance of the fuel cell stack.

[0004] The Chinese invention patent with application number CN 201811117476.8 discloses an automatic stacking device for fuel cells, wherein the automatic stacking device for fuel cells includes a stacking mechanism, a removal mechanism, a manipulator and a control mechanism, and the automatic stacking device for fuel cells can be moved through a guide rail arranged on a workbench through the stacking frame of the stacking mechanism, so that the tightening frame of the stacking frame of the stacking mechanism can be aligned with the fuel cell stack arranged on the mounting platform of the stacking mechanism and press the fuel cell stack arranged on the mounting platform of the stacking mechanism. The automatic stacking device for fuel cells has many defects when used for press-fitting of fuel cell stacks: first, the stacking frame of the stacking mechanism can be moved along the guide rail arranged on the workbench, resulting in the direction of the downward pressure provided by the press provided on the stacking frame of the stacking mechanism being easily changed. Even if the direction of the downward pressure provided by the press provided by the press of the stacking frame of the stacking mechanism changes slightly, it is easy to cause uneven force on the fuel cell stack arranged on the mounting platform of the stacking mechanism. In particular, when the fuel cell automatic stacking device is used for a long time, it is more likely to cause the direction of the downward pressure provided by the press of the stacking frame of the stacking mechanism to change. Secondly, the downward pressure provided by the press of the stacking frame of the stacking mechanism needs to be transmitted to the tightening frame through the pressure rod. The pressure is transmitted through two pressure rods, and when the pressure rod shakes, it is easy to cause the direction of the downward pressure to change. Secondly, the downward pressure provided by the press of the stacking frame of the stacking mechanism is not transmitted to the tightening frame through a plane, and the contact surface between the tightening frame and the fuel cell stack is not a plane, but needs to be transmitted to the fuel cell monomer of the fuel cell stack through the end plate of the fuel cell stack. Accordingly, when the fuel cell stack is pressed down by the tightening frame, the part of the tightening frame away from the contact part of the pressure rod and the pressure rod is easy to weaken the downward pressure due to the lever effect and cause uneven force on the fuel cell stack. Thirdly, when the fuel cell stack is pressed, the automatic stacking device of the fuel cell also corrects the alignment of the flow field plate of the fuel cell stack through the tightening pulley and the positioning column. In essence, the proton exchange membrane is made of flexible materials. When the fuel cell automatic stacking device corrects the alignment of the flow field plate of the fuel cell stack by tightening the pulley and the positioning column, the friction between the flow field plate or bipolar plate of the fuel cell monomer and the proton exchange membrane can easily cause the proton exchange membrane to be misaligned with the flow field plate of the fuel cell monomer, or even cause the proton exchange membrane to be damaged. Moreover, it is impossible to achieve accurate alignment between the flow field plate or bipolar plate of the fuel cell monomer through the interference effect between the tightening pulley and the positioning column. In addition, the downward pressure of the stacking frame of the stacking mechanism on the fuel cell stack can only be achieved through the cooperation between the tightening frame and the positioning column. This not only limits the size of the flow field plate of the fuel cell stack, but also limits the shape of the flow field plate of the fuel cell stack, reducing the versatility of the fuel cell automatic stacking device. Finally, the fuel cell automatic stacking device lacks the detection of the downward pressure provided by the press of the stacking frame of the stacking mechanism.To achieve proper compression of the fuel cell stack, it is necessary to control the magnitude of the downward pressure for compressing the fuel cell stack. If the downward pressure provided by the press of the stack pressing rack of the stacking mechanism is too small, it will be difficult to compress the fuel cell stack. If the downward pressure provided by the press of the stack pressing rack of the stacking mechanism is too large, the flow field plate and the bipolar plate of the fuel cell stack may be crushed. Summary of the invention

[0005] The main advantage of the present invention is that it provides a press for pressing a fuel cell stack, wherein the press for pressing a fuel cell stack of the present invention is capable of pressing the flow field plates of the fuel cell monomers of the stacked fuel cell stack and the membrane electrode assemblies arranged between the flow field plates to ensure the airtightness between the flow field plates and the membrane electrode assemblies of the fuel cells.

[0006] Another advantage of the present invention is that it provides a press for pressing a fuel cell stack, wherein the press for pressing a fuel cell stack of the present invention can accurately detect the downward pressure applied by the system to the fuel cell stack to ensure that the downward pressure on the fuel cell stack is within a preset range and ensure that the fuel cell stack is correctly pressed.

[0007] Another advantage of the present invention is that it provides a press for pressing fuel cell stacks, wherein the frame of the press for pressing fuel cell stacks of the present invention is fixed on the base of the system to ensure that the downward pressure provided by the press for pressing fuel cell stacks of the present invention is directed vertically downward.

[0008] Another advantage of the present invention is to provide a press for press-fitting a fuel cell stack, wherein the downward pressure provided by the press for press-fitting a fuel cell stack of the present invention is applied to the fuel cell stack through a pressure plate to ensure that all parts of the fuel cell stack are evenly stressed. In other words, when the press for press-fitting a fuel cell stack of the present invention presses the fuel cell stack through a continuous force-applying plane, thereby ensuring that all parts of the fuel cell stack are evenly stressed.

[0009] Another advantage of the present invention is that it provides a pressing assembly for pressing a fuel cell stack, wherein the pressing assembly for pressing a fuel cell stack of the present invention can accurately detect the downward pressure applied by the system to the fuel cell stack to ensure that the downward pressure on the fuel cell stack is within a preset range and ensure that the fuel cell stack is correctly pressed.

[0010] Another advantage of the present invention is that it provides a pressing assembly for pressing a fuel cell stack, wherein the pressing machine for pressing a fuel cell stack of the present invention or the downward pressure provided by the pressing machine can be applied to the fuel cell stack through the pressure plate of the pressing assembly for pressing a fuel cell stack of the present invention to ensure that all parts of the fuel cell stack can be evenly stressed.

[0011] Other advantages and features of the present invention are fully apparent from the following detailed description and can be achieved through the combination of means and devices particularly pointed out in the following description.

[0012] According to one aspect of the present invention, a press machine for press-assembling a fuel cell stack of the present invention that can achieve the aforementioned objectives and other objectives and advantages includes:

[0013] A machine base;

[0014] A rack;

[0015] a tray;

[0016] a power device, wherein the power device is configured to provide downward pressure and upward lift to the press assembly; and

[0017] A press-fitting assembly, wherein the frame is arranged on the base, the support is arranged on the frame, and the power device is arranged on the support, wherein the press-fitting assembly is configured to press-fit a fuel cell stack placed between the base and the press-fitting assembly under the action of downward pressure provided by the power device.

[0018] According to another aspect of the present invention, the present invention further provides a press-fit assembly for press-fitting a fuel cell stack, comprising:

[0019] a pressure plate;

[0020] a first pressure transmitting member; and

[0021] A pressure sensor, wherein the first pressure transmission component is arranged between the pressure plate and the pressure sensor, wherein the pressure sensor includes a pressure transmission part and a pressure sensing part, wherein the pressure sensing part is arranged downward, and the pressure sensing part extends and protrudes downward from the pressure transmission part, wherein the pressure sensor, the first pressure transmission component and the pressure plate are arranged from top to bottom in the vertical direction, wherein the press-fitting assembly is arranged to have a press-fitting state and a suspended state, wherein when the press-fitting assembly is in the press-fitting state, the pressure sensing part of the pressure sensor is pressed against the first pressure transmission component of the press-fitting assembly under the action of an appropriate downward pressure, so that the pressure sensor can detect the magnitude of the pressure applied to the pressure plate of the press-fitting assembly; when the press-fitting assembly is in the suspended state, the pressure sensing part of the pressure sensor is separated from the first pressure transmission component of the press-fitting assembly.

[0022] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0023] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 3 is a perspective view of a press machine for press-assembling a fuel cell stack according to an embodiment of the present invention, wherein the press machine for press-assembling a fuel cell stack according to the present invention shown in the figure is capable of press-assembling a fuel cell stack.

[0025] Figure 2 is another perspective view of the press assembly machine for press assembly of a fuel cell stack according to the above-mentioned embodiment of the present invention.

[0026] Figure 3A It is a stereoscopic view of a press assembly of a press machine for press-assembling a fuel cell stack according to the above-mentioned embodiment of the present invention, wherein the press assembly of the press machine for press-assembling a fuel cell stack of the present invention shown in the figure is not pressed on the fuel cell stack.

[0027] Figure 3B It is another stereoscopic view of the pressing assembly of the pressing machine for pressing a fuel cell stack according to the above-mentioned embodiment of the present invention, wherein the pressing assembly of the pressing machine for pressing a fuel cell stack of the present invention shown in the figure is pressed against the fuel cell stack.

[0028] Figure 4A It is a cross-sectional view of a press assembly of a press machine for press-assembling a fuel cell stack according to the above-mentioned embodiment of the present invention, wherein the press assembly of the press machine for press-assembling a fuel cell stack of the present invention shown in the figure is not pressed on the fuel cell stack.

[0029] Figure 4B It is another cross-sectional view of the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack according to the above-mentioned embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack of the present invention shown in the figure is pressed against the fuel cell stack.

[0030] Figure 5 It is an assembly diagram of a press assembly of a press assembly machine for press assembly of a fuel cell stack according to the embodiment of the present invention described above.

[0031] Fig. 6A It is a partial cross-sectional view of a press assembly of a press machine for press-assembling a fuel cell stack according to the above-mentioned embodiment of the present invention, wherein the press assembly of the press machine for press-assembling a fuel cell stack of the present invention shown in the figure is not pressed on the fuel cell stack.

[0032] Figure 6B It is a partial cross-sectional view of a press assembly of a press machine for press-assembling a fuel cell stack according to the above-mentioned embodiment of the present invention, wherein the press assembly of the press machine for press-assembling a fuel cell stack of the present invention shown in the figure is pressed against the fuel cell stack.

[0033] Figure 74 is a cross-sectional view of a second pressure transmission member of a press assembly of a press assembly machine for press assembling a fuel cell stack according to the embodiment of the present invention.

[0034] Figure 8 It is a bottom view of a pressing plate of a pressing assembly of a pressing machine for pressing a fuel cell stack according to the embodiment of the present invention.

[0035] Fig. 9 It is a bottom view of a pressure sensor of a press-assembly assembly of a press-assembly machine for press-assembling a fuel cell stack according to the embodiment of the present invention.

[0036] Fig.10 Shown is an optional implementation of a pressure sensor of a press assembly of a press machine for press-assembling a fuel cell stack according to the above-mentioned embodiment of the present invention.

[0037] Fig.11A and Fig. 11B Shown is an optional implementation of a press assembly of a press machine for press-assembling a fuel cell stack according to the above-mentioned embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0039] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0040] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0041] Referring to the accompanying drawings of the present invention Figures 1 to 10, a press machine for press-fitting a fuel cell stack according to an embodiment of the present invention is illustrated, wherein the press machine for press-fitting a fuel cell stack of the present invention comprises a base 10, a frame 20, a pallet 30, a power device 40 and a press assembly 60, wherein the frame 20 is arranged on the base 10, the pallet 30 is arranged on the frame 20, the power device 40 is arranged on the pallet 30, wherein the power device 40 is arranged to provide downward pressure and upward lifting force to the press assembly 60, wherein the press assembly 60 is suitable for press-fitting a fuel cell stack 1 placed between the base 10 and the press assembly 60 under the action of the downward pressure provided by the power device 40, and being suspended in the air under the action of the upward lifting force provided by the power device 40. Preferably, the frame 20 is fixed to the base 10, so that the downward pressure provided by the power device 40 is smoothly transmitted to the press assembly 60.

[0042] As shown in the attached picture Figure 1 and Figure 2 As shown, the frame 20 of the press machine for press-assembling a fuel cell stack according to an embodiment of the present invention includes four columns 21, wherein each column 21 includes a lower end 211 and a higher end 212 extending upward from the lower end, wherein the lower end 211 of the column 21 is fixed to the base 10, and the support platform 30 is fixed to the higher end 212 of the column 21. In other words, the support platform 30 is supported by the column 21 of the frame 20. Preferably, the support platform 30 is horizontally supported by the column 21 of the frame 20. More preferably, the column 21 of the frame 20 is fixed to the four corners of the base 10, respectively.

[0043] As shown in the attached picture Figure 1 and Figure 2 As shown, the power device 40 of the press machine for press-fitting a fuel cell stack according to an embodiment of the present invention comprises a servo motor 41 and an electric cylinder 42 connected to the servo motor 41, wherein the servo motor 41 controls the piston 421 of the electric cylinder 42 to move forward (moving away from the servo motor 41 or toward the fuel cell stack) and backward (moving toward the servo motor 41 or away from the fuel cell stack) according to the control instruction and controls the magnitude of the downward pressure. Further, the press assembly 60 is connected to the piston 421 of the electric cylinder 42, wherein the piston 421 of the electric cylinder 42 is configured to reciprocate in the vertical direction under the downward pressure and upward lift provided by the power device 40, so that the press assembly 60 reciprocates in the vertical direction.

[0044] As shown in the attached picture Figure 1 and Figure 2As shown, the base 10 of the press machine for press-fitting a fuel cell stack according to an embodiment of the present invention comprises a body 11 and a workbench 12 horizontally arranged on the body 11, wherein the frame 20 is arranged on the body 11. Preferably, the workbench 12 is movably arranged on the body 11 to facilitate the operation of the operator. More preferably, the workbench 12 forms a horizontal operating surface 121 so that the fuel cell stack 1 can be placed horizontally on the workbench 12, and the press machine for press-fitting a fuel cell stack of the present invention is convenient for press-fitting the fuel cell stack 1.

[0045] As shown in the attached picture Figure 1 and Figure 2 As shown, the body 11 of the base 10 of the press machine for press-fitting a fuel cell stack according to an embodiment of the present invention forms a slide rail 111, and the workbench 12 forms a slide groove 120, wherein the workbench 12 is slidably disposed on the slide rail 111 through the slide groove 120, so that the workbench 12 can be slidably disposed on the body 11. Optionally, the slide rail 111 can also be a component or element fixedly disposed on the body 11. It can be understood that the workbench 12 can be slidably disposed on the body 11, and it can also be achieved in other ways. For example, the workbench 12 forms the slide rail 111, and the slide groove 120 is formed by the body 11.

[0046] It is worth noting that, in order to facilitate the operation of the operator, the horizontal operating surface 121 of the workbench 12 is located at a position higher than the top of the body 11 of the machine base 10 .

[0047] As shown in the attached picture Figures 1 to 5 As shown, the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention is connected to the piston 421 of the electric cylinder 42 of the power device 40, and the press-fitting assembly 60 forms a press-fitting plane 601 facing directly below it, so that the press-fitting assembly 60 can press-fit the fuel cell stack 1 under the downward pressure provided by the electric cylinder 42. Preferably, the press-fitting plane 601 is set to be horizontal and a continuous plane, so that the downward pressure can be uniformly provided to the force-bearing part of the fuel cell stack 1 through the press-fitting assembly 60.

[0048] As shown in the attached picture Figure 1 and Figure 2As shown, the press machine for press-fitting a fuel cell stack according to an embodiment of the present invention further includes two directional rods 70, wherein the directional rods 70 are respectively arranged on the support platform 30, and the directional rods 70 are arranged to be able to reciprocate up and down relative to the support platform 30. Further, the two ends of the press assembly 60 of the press machine for press-fitting a fuel cell stack of the present invention are respectively arranged on the directional rods 70 to keep the press plane 601 of the press assembly 60 horizontal. In other words, the directional rods 70 are used to keep the press plane 601 of the press assembly 60 always horizontal. Further, the directional rods 70 are arranged to be able to move synchronously with the piston 421 of the electric cylinder 42.

[0049] As shown in the attached picture Figures 3A to 9As shown, the press assembly 60 of the press assembly machine for press-assembling a fuel cell stack according to an embodiment of the present invention includes a press plate 61, a first pressure transmission member 62, and a pressure sensor 63 disposed on the piston 421 of the electric cylinder 42, wherein the first pressure transmission member 62 is disposed between the press plate 61 and the pressure sensor 63, wherein the pressure sensor 63 includes a pressure transmission portion 631 and a pressure sensing portion 632, wherein the pressure sensing portion 632 is disposed downward, and the pressure sensing portion 632 extends and protrudes downward from the pressure transmission portion 631, wherein the pressure sensor 63, the first pressure transmission member 62, and the pressure sensor 63 are ..., the first pressure transmission member 62, and the pressure sensor 63 are disposed between the press plate 61 and the pressure sensor 63, wherein the pressure sensor 63 includes a pressure transmission portion 631 and a pressure sensing portion 632, wherein the pressure sensing portion 632 is disposed downward, and the pressure sensing portion 632 extends and protrudes downward from the pressure The force transmission member 62 and the pressing plate 61 are arranged vertically from top to bottom, wherein the press assembly 60 is arranged to have a press state and a suspended state, wherein when the press assembly 60 is in the press state, the pressure sensing part 632 of the pressure sensor 63 is pressed against the first pressure transmission member 62 of the press assembly 60 by the piston 421 under the action of the downward pressure provided by the power device 40, so that the pressure sensor 63 can detect the magnitude of the pressure on the pressing plate 61 of the press assembly 60 and the magnitude of the downward pressure applied by the pressing plate 61 to the fuel cell stack 1. At this time, the downward pressure generated by the electric cylinder 42 is transmitted to the pressure sensor 63 through the piston 421, and is transmitted to the pressing plate 61 through the pressure sensor 63, so that the press assembly machine of the present invention can press the fuel cell stack 1 through the pressing plate 61. Further, when the press-fit assembly 60 is in a suspended state, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure transmission member 62 of the press-fit assembly 60 move upward synchronously and separate from the pressing plate 61, thereby preventing the pressure sensor 63 from being accidentally touched by the first pressure transmission member 62 and causing the pressure sensor 63 to produce an erroneous detection result. At this time, the relative position of the first pressure transmission member 62 and the pressure sensing portion 632 of the pressure sensor 63 remains fixed. In other words, when the press-fit assembly 60 is in a suspended state, the first pressure transmission member 62 of the press-fit assembly 60 and the pressing plate 61 form a spacing space therebetween, so that the first pressure transmission member 62 of the press-fit assembly 60 is separated from the pressing plate 61, thereby preventing the pressure sensor 63 from being accidentally touched by the first pressure transmission member 62 and producing an erroneous detection result. In addition, when the press-fit assembly 60 is in a suspended state, the first pressure transmission member 62 of the press-fit assembly 60 is kept separated from the pressure plate 61. Accordingly, the first pressure transmission member 62 of the pressure sensor 63 contacts the pressure plate 61 and transmits the pressure it receives to the pressure sensing portion 632 of the pressure sensor 63 only when the press-fit assembly 60 is press-fitted to the fuel cell stack 1. Accordingly, in this way, false contact between the pressure sensor 63 and the first pressure transmission member 62 is avoided.It can be understood that the pressure sensing part 632 of the pressure sensor 63 can be electrically connected to the control module of the control unit 90 of the press machine of the present invention through a signal line, so that the pressure signal detected by the pressure sensor 63 can be transmitted to the control module of the control unit 90.

[0050] It is worth noting that since the press plate 61 of the press assembly 60 of the press assembly machine for press-assembling a fuel cell stack of the present invention frequently presses the fuel cell stack 1, the press plate 61 of the press assembly 60 should have a certain hardness to prevent the press plate 61 from being deformed and difficult to provide a uniformly distributed downward pressure to the fuel cell stack 1 in a short time. In addition, in order to prevent the press plate 61 from being deformed, the press plate 61 of the press assembly 60 should also have an appropriate thickness. Preferably, the press plate 61 of the press assembly 60 is made of a material with a Rockwell hardness of not less than HRC45. More preferably, the press plate 61 of the press assembly 60 is made of a metal material with a Rockwell hardness of not less than HRC45.

[0051] As shown in the attached picture Figure 1 and Figure 2 As shown, the press machine for press-fitting a fuel cell stack according to an embodiment of the present invention further transmits the downward pressure and upward lifting force generated by the power device 40 to the press-fit assembly 60 through a pressure transmission column, wherein one end of the pressure transmission column is connected to the piston 421 of the electric cylinder 42 of the power device 40, and the other end of the pressure transmission column is connected to the press-fit assembly 60, wherein the power device 40 is configured to provide downward pressure, and the pressure transmission column is suitable for transmitting the downward pressure provided by the power device 40 to the press-fit assembly 60. Further, the power device 40 can also provide an upward lifting force to lift the press-fit assembly 60 upward and keep the press-fit assembly 60 in a suspended state. Accordingly, when the press-fit assembly 60 is in the press-fit state, the pressure sensing portion 632 of the pressure sensor 63 is pressed against the first pressure transmission member 62 of the press-fit assembly 60 by the pressure transmission column under the downward pressure provided by the power device 40, so that the pressure sensor 63 can detect the magnitude of the pressure applied to the pressure plate 61 of the press-fit assembly 60 and the magnitude of the downward pressure applied by the pressure plate 61 to the fuel cell stack 1. However, the pressure transmission column can be provided to be integrally formed with the piston 421. In this case, the pressure transmission column can be regarded as a part of the piston 421.

[0052] As shown in the attached picture Figures 3A to 9As shown, the pressing plate 61 of the pressing assembly 60 of the pressing machine for pressing a fuel cell stack according to an embodiment of the present invention includes a pressure-bearing portion 611 and a pressure-applying portion 612 fixed to the pressure-bearing portion 611. It can be understood that the bottom of the pressing plate 61 of the pressing assembly 60 forms the pressing plane 601. More specifically, the bottom of the pressure-applying portion 612 of the pressing plate 61 of the pressing assembly 60 forms the pressing plane 601. Therefore, the pressure-applying portion 612 of the pressing plate 61 of the pressing assembly 60 should have a certain hardness. Preferably, the pressure-applying portion 612 of the pressing plate 61 of the pressing assembly 60 is made of a material with a Rockwell hardness of not less than HRC45. More preferably, the pressure-applying portion 612 of the pressing plate 61 of the pressing assembly 60 is made of a metal material with a Rockwell hardness of not less than HRC45. The pressure-applying portion 612 of the pressing plate 61 of the press-fitting assembly 60 is preferably detachably fixed to the pressure-bearing portion 611 of the pressing plate 61, so that the pressure-applying portion 612 can be replaced. Further, the length of the pressure-bearing portion 611 of the pressing plate 61 of the press-fitting assembly 60 is preferably greater than the length of the pressure-applying portion 612, and the two directional rods 70 are respectively disposed at both ends of the pressure-bearing portion 611.

[0053] As shown in the attached picture Figures 3A to 9 As shown, the pressing assembly 60 of the pressing machine for pressing a fuel cell stack according to an embodiment of the present invention further includes a second pressure conductor 64, wherein the second pressure conductor 64 is arranged between the pressure plate 61 and the pressure conductor 631 of the pressure sensor 63, wherein when the pressing assembly 60 is in a pressing state, the pressure conductor 631 of the pressure sensor 63 is pressed against the second pressure conductor 64 of the pressing assembly 60 by the piston 421 under the action of the downward pressure provided by the power device 40, so that the downward pressure provided by the power device 40 is transmitted to the pressure plate 61 of the pressing assembly 60 through the piston 421, so that the pressure plate 61 of the pressing assembly 60 can press the fuel cell stack 1. In other words, when the press-fitting assembly 60 is in a press-fitting state, the downward pressure generated by the electric cylinder 42 is transmitted to the pressure sensor 63 through the piston 421, and the pressure sensor 63 transmits the pressure to the second pressure transmitter 64 and the first pressure transmitter 62 respectively through its pressure transmission part 631 and the pressure sensing part 632. The first pressure transmitter 62 and the second pressure transmitter 64 further transmit the downward pressure to the press plate 61 of the press-fitting assembly 60, so that the press plate 61 of the press-fitting assembly 60 can press the fuel cell stack 1.

[0054] It is worth noting that, as shown in the attached figure Figures 3A to 9As shown, the second pressure transmission member 64 of the press assembly 60 of the press assembly machine for press-assembling a fuel cell stack according to an embodiment of the present invention is fixed to the pressure transmission part 631 of the pressure sensor 63, so that the second pressure transmission member 64 can move synchronously with the pressure sensor 63. Accordingly, the second pressure transmission member 64 is arranged between the pressure plate 61 and the pressure transmission part 631 of the pressure sensor 63, increasing the contact surface of the pressure plate 61 of the press assembly 60 transmitted to the downward pressure generated by the electric cylinder 42 through the piston 421 and the pressure sensor 63, so that the downward pressure generated by the electric cylinder 42 can be more smoothly transmitted to the pressure plate 61 of the press assembly 60 and the pressure on the fuel cell stack can be more stable and the size distribution is more uniform. Therefore, the first pressure transmission member 62 and the second pressure transmission member 64 are preferably block-shaped. More preferably, the first pressure transmission member 62 is preferably columnar, and the second pressure transmission member 64 is preferably table-shaped. Preferably, the second pressure transmission member 64 is configured to be able to reciprocate within a preset distance D relative to the pressure plate 61, wherein the preset distance D is 0.1 mm-0.5 mm.

[0055] As shown in the attached picture Figures 3A to 9As shown, the pressure transmission part 631 of the pressure sensor 63 of the press assembly machine for press assembly of a fuel cell stack according to an embodiment of the present invention forms a receiving cavity 6310, and the second pressure transmission member 64 forms a through hole 640, wherein the pressure sensing part 632 is arranged in the receiving cavity 6310, and the first pressure transmission member 62 is arranged in the through hole 640 of the second pressure transmission member 64, and the pressure transmission part 631 of the pressure sensor 63 is opposite to the second pressure transmission member 64, and the pressure sensing part 632 of the pressure sensor 63 is opposite to the second pressure transmission member 64. After the downward pressure generated by the electric cylinder 42 is transmitted to the pressure sensor 63 through the piston 421 for the first pressure transmission component 62, the pressure sensor 63 can transmit the downward pressure to the second pressure transmission component 64 and the first pressure transmission component 62 respectively through its pressure transmission part 631 and the pressure sensing part 632. The first pressure transmission component 62 and the second pressure transmission component 64 can further transmit the downward pressure to the pressure plate 61 of the press assembly 60, and enable the pressure plate 61 of the press assembly 60 to press the fuel cell stack 1. Accordingly, when the piston 421 of the electric cylinder 42 moves downward, so that the pressure sensor 63 and the second pressure transmission member 64 move downward until the pressure plate 61 presses against the fuel cell stack 1, the pressure sensing part 632 of the pressure sensor 63 presses against the first pressure transmission member 62, and the second pressure transmission member 64 presses against the pressure plate 61 of the press-fitting assembly 60, so that the downward pressure generated by the electric cylinder 42 is transmitted to the fuel cell stack 1 via the piston 421, the pressure sensor 63, the first pressure transmission member 62, the second pressure transmission member 64, and the pressure plate 61; when the fuel cell stack 1 is press-fitted, the pressure sensor 63 and the second pressure transmission member 64 move upward driven by the piston 421 of the electric cylinder 42, and the pressure sensor 63 is separated from the first pressure transmission member 62. Optionally, one end of the first pressure transmission member 62 facing the pressure sensor 63 is fixed to the pressure sensor 63. More preferably, the pressure sensor 63 is an eddy current pressure sensor so as to be able to detect static pressure. Most preferably, the pressure sensing portion 632 has a ring-shaped cross-section.

[0056] As shown in the attached picture Figures 3A to 9As shown, the first pressure transmission member 62 of the press assembly 60 of the press assembly machine for press assembly of a fuel cell stack according to an embodiment of the present invention has a pressure transmission end 621 facing the pressure sensor 63 and a pressure-bearing end 622 disposed on the press plate 61. When the press assembly 60 is in a press assembly state, the pressure sensing portion 632 of the pressure sensor 63 is pressed against the pressure transmission end 621 of the first pressure transmission member 62 of the press assembly 60 by the piston 421 under the action of the downward pressure provided by the power device 40. Further, the first pressure transmission member 62 has a fixing portion 623 extending upward from the pressure transmission end 621, wherein the fixing portion 623 is adapted to be accommodated in the accommodating cavity 6310 of the pressure transmission portion 631 of the pressure sensor 63 and fixed to the pressure sensor 63.

[0057] As shown in the attached picture Figures 3A to 9 As shown, the press plate 61 of the press assembly 60 of the press assembly machine for press-assembling a fuel cell stack according to an embodiment of the present invention further forms a receiving chamber 6110, wherein the pressure-bearing end 622 of the first pressure transmitter 62 is adapted to be disposed in the receiving chamber 6110. Further, the receiving chamber 6110 is formed in the pressure-bearing portion 611 of the press plate 61, so that the pressure-bearing end 622 of the first pressure transmitter 62 can directly act on the pressure-applying portion 612 of the press plate 61. Correspondingly, the second pressure transmitter 64 is adapted to directly act on the pressure-bearing portion 611 of the press plate 61.

[0058] As shown in the attached picture Figures 3A to 9 As shown, the press assembly 60 of the press assembly machine for press-assembling a fuel cell stack according to an embodiment of the present invention further includes two retainers 65, wherein each retainer 65 includes a low end 651 and a high end 652 extending upward from the low end 651, wherein the low end 651 of the two retainers 65 are respectively fixed to the press plate 61, and the high end 652 of the two retainers 65 are respectively slidably arranged on both sides of the second pressure transmission member 64. Preferably, the retainer 65 is L-shaped. Further, the height of the high end 652 of the retainer 65 is h, and the sliding distance D of the retainer 65 relative to the second pressure transmission member 64 is not greater than h.

[0059] As shown in the attached picture Figures 3A to 9As shown, the high end portion 652 of each retaining member 65 of the pressing assembly 60 of the pressing machine for pressing a fuel cell stack according to an embodiment of the present invention forms a slide groove 6520, and the second pressure transmitting member 64 forms two engaging portions 641, wherein the engaging portions 641 are respectively arranged on both sides of the second pressure transmitting member 64, wherein the engaging portions 641 are arranged to be slidably engaged with the slide groove 6520 of the high end portion 652 of the retaining member 65. Further, the slide groove 6520 of the high end portion 652 of the retainer 65 is arranged to extend to the top of the high end portion 652 of the retainer 65 and the low end portion 651 of the retainer 65, so that the high end portion 652 of the retainer 65 forms a hook 6521, wherein when the fuel cell stack 1 is press-fitted, the pressure sensor 63 and the second pressure transmission member 64 move upward by a preset distance D driven by the piston 421 of the electric cylinder 42, each of the retainers 65 can be suspended on the second pressure transmission member 64 through the hook 6521 formed by its high end portion 652. At this time, the pressing plate 61 of the press-fit assembly 60 no longer provides any downward pressure. It can be understood that when the press-fit assembly 60 is in a suspended state, the spacing distance between the pressure sensing portion 632 of the pressure sensor 63 and the first pressure transmission member 62 is the same as the preset distance D. It is noteworthy that the retaining member 65 and the second pressure transmission member 64 hold the pressure plate 61 of the press-fit assembly 60, the first pressure transmission member 62, the retaining member 65 and the second pressure transmission member 64, and can form an organic whole no matter in the press-fit state or in the suspended state.

[0060] As shown in the attached picture Figures 1 to 9As shown, according to an embodiment of the present invention, the present invention further provides a press-fitting assembly 60 for press-fitting a fuel cell stack, wherein the press-fitting assembly 60 includes a press plate 61, a first pressure transmission member 62 and a pressure sensor 63, wherein the first pressure transmission member 62 is arranged between the press plate 61 and the pressure sensor 63, wherein the pressure sensor 63 includes a pressure transmission portion 631 and a pressure sensing portion 632, wherein the pressure sensing portion 632 is arranged downward, and the pressure sensing portion 632 extends and protrudes downward from the pressure transmission portion 82, wherein the pressure sensor 63, The first pressure transmission member 62 and the pressing plate 61 are arranged from top to bottom in the vertical direction, wherein the press assembly 60 is arranged to have a press state and a suspended state, wherein when the press assembly 60 is in the press state, the pressure sensing portion 632 of the pressure sensor 63 presses against the first pressure transmission member 62 of the press assembly 60 under the action of an appropriate downward pressure, so that the pressure sensor 63 can detect the magnitude of the pressure on the pressing plate 61 of the press assembly 60 and the magnitude of the downward pressure applied by the pressing plate 61 to the fuel cell stack 1 can be detected. Further, when the press assembly 60 is in the suspended state, the pressure sensing portion 632 of the pressure sensor 63 is suspended synchronously with the first pressure transmission member 62 of the press assembly 60, so as to avoid the pressure sensor 63 being accidentally touched by the first pressure transmission member 62 and causing the pressure sensor 63 to produce an erroneous detection result. At this time, the first pressure transmission member 62 is held between the pressure sensing portion 632 of the pressure sensor 63 and the pressing plate 61. In other words, when the press-fit assembly 60 is in a suspended state, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure transmission member 62 of the press-fit assembly 60 form a spacing space between the two, so that the pressure sensing portion 632 and the first pressure transmission member 62 of the press-fit assembly 60 are separated, thereby preventing the pressure sensor 63 from being accidentally touched by the first pressure transmission member 62 and generating an erroneous detection result. In addition, when the press-fit assembly 60 is in a suspended state, the first pressure transmission member 62 is held between the pressure sensing portion 632 of the pressure sensor 63 and the pressing plate 61. Accordingly, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure transmission member 62 of the press-fit assembly 60 only come into contact when the fuel cell stack 1 is press-fitted, which can further prevent the generation of detection errors.

[0061] Attached pictures Fig.10The figure shows an optional implementation of the pressure sensor 63 of the press machine for press-fitting a fuel cell stack according to an embodiment of the present invention, wherein the pressure sensor 63 includes a pressure transmission part 631 and at least three pressure sensing parts 632A extending from the pressure transmission part 631, wherein the pressure sensing parts 632A are arranged at intervals. It can be understood that since the pressure sensing part 632A of the pressure sensor 63 is arranged at three mutually spaced positions, when the pressure of the press plate 61 of the press assembly 60 on the fuel cell stack 1 is uneven, the pressure sensed by the pressure sensing part 632A of the pressure sensor 63 is also different. In other words, when the pressure sensed by the pressure sensing part 632A of the pressure sensor 63 is different, the pressure of the press plate 61 of the press assembly 60 on different parts of the fuel cell stack 1 is different. In this way, it can be detected whether the pressure of the press plate 61 of the press assembly 60 on different parts of the fuel cell stack 1 is uniform.

[0062] Attached pictures Fig.11A and Fig. 11B What is shown is an optional implementation of the pressing assembly 60 of the pressing machine for pressing a fuel cell stack according to an embodiment of the present invention, wherein a slide groove 640A is formed on both sides of the second pressure transmitting member 64A of the pressing assembly, and the high end portion 652A of each retaining member 65A forms an engaging portion 6521A, wherein the engaging portion 6521A formed by the high end portion 652A of the retaining member 65A is configured to be slidably engaged with the slide groove 640A of the second pressure transmitting member 64A. Further, the slide groove 640A of the second pressure transmission member 64A is arranged to extend on both sides of the second pressure transmission member 64A, so that a hook is formed on both sides of the second pressure transmission member 64A, wherein when the fuel cell stack 1 is press-fitted, the pressure sensor 63 and the second pressure transmission member 64A move upward driven by the piston 421 of the electric cylinder 42, and each of the retaining members 65A can be suspended on the second pressure transmission member 64A through the slide groove 640A formed on both sides thereof. It is worth noting that the retaining member 65A and the second pressure transmission member 64A hold the pressing plate 61, the first pressure transmission member 62, the retaining member 65A and the second pressure transmission member 64A of the press-fitting assembly 60, whether in the press-fitting state or in the suspended state, and can form an organic whole.

[0063] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved.

[0064] The functional and structural principles of the present invention have been demonstrated and described in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A press machine for press-assembling a fuel cell stack, characterized in that: include: A machine base; A rack; a tray; a power unit; and A press-fitting assembly, wherein the power device is configured to provide downward pressure and upward lift to the press-fitting assembly, the power device includes a servo motor and an electric cylinder connected to the servo motor, wherein the press-fitting assembly is connected to the piston of the electric cylinder, wherein the piston of the electric cylinder is configured to be able to reciprocate in the vertical direction under the action of the downward pressure and upward lift provided by the power device, wherein the frame is arranged on the base, the support platform is arranged on the frame, and the power device is arranged on the support platform, wherein the press-fitting assembly is configured to press-fit a fuel cell stack placed between the base and the press-fitting assembly under the action of the downward pressure provided by the power device, wherein the press-fitting assembly includes a pressure plate, a first pressure transmission member, a second pressure transmission member and a pressure sensor arranged on the piston of the electric cylinder, wherein the first pressure transmission member is arranged between the pressure plate and the pressure sensor, wherein the pressure sensor includes a pressure transmission portion and at least one pressure sensing portion, wherein the pressure sensing portion is arranged downward, and the pressure sensing portion is downward from the pressure transmission portion The press-fit assembly is provided with a press-fit state and a suspended state, wherein the pressure sensor, the first pressure transmission member and the pressure plate are arranged from top to bottom in a vertical direction, wherein the press-fit assembly is provided with a press-fit state and a suspended state, wherein when the press-fit assembly is in the press-fit state, the pressure sensing part of the pressure sensor is pressed against the first pressure transmission member of the press-fit assembly by the piston under the action of the downward pressure provided by the power device, so that the pressure sensor can detect the magnitude of the pressure on the pressure plate of the press-fit assembly; when the press-fit assembly is in the suspended state, the press-fit assembly is suspended under the action of the upward lift provided by the power device, and the first pressure transmission member of the press-fit assembly is separated from the pressure plate, wherein the second pressure transmission member is arranged between the pressure plate and the pressure transmission part of the pressure sensor, wherein when the press-fit assembly is in the press-fit state, the pressure transmission part of the pressure sensor is pressed against the second pressure transmission member of the press-fit assembly by the piston under the action of the downward pressure provided by the power device, so that the downward pressure provided by the power device is transmitted to the pressure plate of the press-fit assembly through the piston.

2. The press machine according to claim 1, characterized in that: The press-fitting assembly forms a press-fitting plane facing directly below it, wherein the press-fitting plane is a continuous plane and is arranged to be horizontal.

3. The press machine according to claim 1, characterized in that: The pressure transmission part of the pressure sensor forms a receiving cavity, and the second pressure transmission component forms a through hole, wherein the pressure sensing part is arranged in the receiving cavity, and the first pressure transmission component is arranged in the through hole of the second pressure transmission component.

4. The press machine according to claim 3, characterized in that: The pressure transmission part of the pressure sensor faces the second pressure transmission component, and the pressure sensing part of the pressure sensor faces the first pressure transmission component.

5. The press machine according to claim 3, characterized in that: The press-fitting assembly further includes two retaining members, each of which includes a lower end portion and a higher end portion extending upward from the lower end portion, wherein the lower end portions of the two retaining members are respectively fixed to the pressure plate, and the higher end portions of the two retaining members are respectively slidably disposed on both sides of the second pressure transmitting member.

6. The press machine according to claim 5, characterized in that: The height of the high end portion of the retaining member is h, and a sliding distance D of the retaining member relative to the second pressure transmitting member is not greater than h.

7. The press machine according to claim 5, characterized in that: The high end portion of each retaining member forms a slide groove, and the second pressure transmitting member forms two engaging portions, wherein the engaging portions are respectively arranged on both sides of the second pressure transmitting member, wherein the engaging portions are arranged to be suitable for slidably engaging with the slide groove of the high end portion of the retaining member.

8. The press machine according to claim 7, characterized in that: The slide groove of the high end portion of the retaining member is arranged to extend at the top end of the high end portion of the retaining member and the low end portion of the retaining member, so that the high end portion of the retaining member forms a hook.

9. The press machine according to claim 5, characterized in that: A slide groove is formed on both sides of the second pressure transmission component of the press-fitting assembly, and the high end portion of each retaining component forms an engaging portion, wherein the engaging portion formed by the high end portion of the retaining component is configured to be slidably engaged with the slide groove of the second pressure transmission component.

10. The press machine according to claim 9, characterized in that The slide groove of the second pressure transmission component is arranged to extend on both sides of the second pressure transmission component, so that a hook is formed on each side of the second pressure transmission component.

11. The press machine according to claim 1, 3, 5, 6, 7, 8, 9 or 10, characterized in that: The first pressure transmission part of the press-fit assembly has a pressure transmission end facing the pressure sensor and a pressure-bearing end facing the pressure plate, wherein when the press-fit assembly is in a press-fit state, the pressure sensing part of the pressure sensor is pressed against the pressure transmission end of the first pressure transmission part of the press-fit assembly by the piston under the action of the downward pressure provided by the power device.

12. The press machine according to claim 4, characterized in that: The first pressure transmission part of the press-fit assembly has a pressure transmission end facing the pressure sensor and a pressure-bearing end facing the pressure plate, wherein when the press-fit assembly is in a press-fit state, the pressure sensing part of the pressure sensor is pressed against the pressure transmission end of the first pressure transmission part of the press-fit assembly by the piston under the action of the downward pressure provided by the power device.

13. The press machine according to claim 12, characterized in that: The first pressure transmitting member has a fixing portion extending upward from the pressure transmitting end, wherein the fixing portion is suitable for being accommodated in the accommodating cavity of the pressure transmitting portion of the pressure sensor.

14. The press-fitting machine according to claim 1, characterized in that: The pressure sensor includes a pressure transmission part and at least three pressure sensing parts respectively extending from the pressure transmission part, wherein the pressure sensing parts are arranged at intervals.

15. The press according to claim 1, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that The pressure sensor is an eddy current pressure sensor.

16. A press according to claim 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that The second pressure transmission member of the press-fit assembly is fixed to the pressure transmission portion of the pressure sensor.

17. A press according to claim 2, 3, 4, 5, 6, 7, 8, 9 or 10, characterized in that The pressing plate of the press-fitting assembly forms the press-fitting plane.

18. The press machine according to claim 12 or 13, characterized in that: The pressure-bearing end of the pressing plate of the press-fit assembly is made of a material with a Rockwell hardness not less than HRC45.

19. A press-fit assembly for press-fitting a fuel cell stack, characterized in that: include: a pressure plate; a first pressure transmitting member; a second pressure transmitting member; and A pressure sensor, wherein the first pressure transmission member is arranged between the pressure plate and the pressure sensor, wherein the pressure sensor includes a pressure transmission part and a pressure sensing part, wherein the pressure sensing part is arranged downward, and the pressure sensing part extends and protrudes downward from the pressure transmission part, wherein the pressure sensor, the first pressure transmission member and the pressure plate are arranged from top to bottom in a vertical direction, wherein the press-fit assembly is arranged to have a press-fit state and a suspended state, wherein when the press-fit assembly is in the press-fit state, the pressure sensing part of the pressure sensor is pressed against the pressure sensor under the action of an appropriate downward pressure The first pressure transmission component of the press-fit assembly enables the pressure sensor to detect the size of the pressure applied to the pressure plate of the press-fit assembly; when the press-fit assembly is in a suspended state, the pressure sensing part of the pressure sensor is suspended synchronously with the first pressure transmission component of the press-fit assembly, wherein the second pressure transmission component is arranged between the pressure plate and the pressure transmission component of the pressure sensor, wherein when the press-fit assembly is in a press-fit state, the pressure transmission component of the pressure sensor is pressed against the second pressure transmission component of the press-fit assembly under the action of the downward pressure, thereby transmitting the downward pressure to the pressure plate of the press-fit assembly.

20. The press-fit assembly according to claim 19, characterized in that The pressure transmission part of the pressure sensor forms a receiving cavity, and the second pressure transmission component forms a through hole, wherein the pressure sensing part is arranged in the receiving cavity, and the first pressure transmission component is arranged in the through hole of the second pressure transmission component.

21. The press-fit assembly according to claim 20, characterized in that The pressure transmission part of the pressure sensor faces the second pressure transmission component, and the pressure sensing part of the pressure sensor faces the first pressure transmission component.

22. The press-fit assembly according to claim 21, characterized in that The press-fitting assembly further includes two retaining members, each of which includes a lower end portion and a higher end portion extending upward from the lower end portion, wherein the lower end portions of the two retaining members are respectively fixed to the pressure plate, and the higher end portions of the two retaining members are respectively slidably disposed on both sides of the second pressure transmitting member.

23. The press-fit assembly according to claim 22, characterized in that The height of the high end portion of the retaining member is h, and a sliding distance D of the retaining member relative to the second pressure transmitting member is not greater than h.

24. The press-fit assembly according to claim 22, characterized in that The high end portion of each retaining member forms a slide groove, and the second pressure transmitting member forms two engaging portions, wherein the engaging portions are respectively arranged on both sides of the second pressure transmitting member, wherein the engaging portions are arranged to be suitable for slidably engaging with the slide groove of the high end portion of the retaining member.

25. The press-fit assembly according to claim 24, characterized in that The slide groove of the high end portion of the retaining member is arranged to extend at the top end of the high end portion of the retaining member and the low end portion of the retaining member, so that the high end portion of the retaining member forms a hook.

26. The press-fit assembly according to claim 22, characterized in that A slide groove is formed on both sides of the second pressure transmission component of the press-fitting assembly, and the high end portion of each retaining component forms an engaging portion, wherein the engaging portion formed by the high end portion of the retaining component is configured to be slidably engaged with the slide groove of the second pressure transmission component.

27. The press-fit assembly according to claim 26, characterized in that The slide groove of the second pressure transmission component is arranged to extend on both sides of the second pressure transmission component, so that a hook is formed on each side of the second pressure transmission component.

28. A press-fit assembly according to claim 19, 20, 22, 23, 24, 25, 26 or 27, characterized in that The first pressure transmission component of the press-fit assembly has a pressure transmission end facing the pressure sensor and a pressure-bearing end facing the pressure plate, wherein when the press-fit assembly is in a press-fit state, the pressure sensing portion of the pressure sensor is pressed against the pressure transmission end of the first pressure transmission component of the press-fit assembly under the action of the downward pressure.

29. The press-fit assembly according to claim 21, characterized in that The first pressure transmission component of the press-fit assembly has a pressure transmission end facing the pressure sensor and a pressure-bearing end facing the pressure plate, wherein when the press-fit assembly is in a press-fit state, the pressure sensing portion of the pressure sensor is pressed against the pressure transmission end of the first pressure transmission component of the press-fit assembly under the action of the downward pressure.

30. The press-fit assembly according to claim 29, characterized in that The first pressure transmitting member has a fixing portion extending upward from the pressure transmitting end, wherein the fixing portion is suitable for being accommodated in the accommodating cavity of the pressure transmitting portion of the pressure sensor.

31. The press-fit assembly of claim 19, 20, 21, 22, 23, 24, 25, 26 or 27, wherein: The pressure sensor is an eddy current pressure sensor.

32. The press-fit assembly of claim 20, 21, 22, 23, 24, 25, 26 or 27, wherein: The second pressure transmission member of the press-fit assembly is fixed to the pressure transmission portion of the pressure sensor.

33. The press-fit assembly of claim 19, 20, 21, 22, 23, 24, 25, 26 or 27, wherein: The pressing plate forms a pressing plane, wherein the pressing plane is a continuous plane and is arranged to be horizontal.

34. The press-fit assembly according to claim 29 or 30, characterized in that The pressure-bearing end of the pressure plate is made of a material with a Rockwell hardness not less than HRC45.

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