CN210956861U - Press-fitting assembly for press-fitting fuel cell stack - Google Patents

Abstract

The utility model provides a press-fitting component for press-fitting a fuel cell stack, which comprises a press plate, a first pressure conduction piece and a pressure sensor, wherein the first pressure transmitter is arranged between the pressure plate and the pressure sensor, wherein the pressure sensor comprises a pressure transmitting part and a pressure sensing part, wherein the pressure sensing part is arranged downwards, and the pressure sensing part extends downwards and protrudes from the pressure transmission part, wherein the pressure sensor, the first pressure transmitter and the pressure plate are arranged from top to bottom in a vertical direction, wherein the press-fitting assembly is configured to have a press-fitting state and a suspended state, wherein when in the press-fitting state, the pressure sensing part of the pressure sensor is pressed against the first pressure conduction piece of the press-fitting assembly under the action of proper downward pressure; when the pressure sensor is in a suspension state, the pressure sensing part of the pressure sensor and the first pressure conduction piece of the press-fitting assembly are suspended synchronously.

Description

Press-fitting assembly for press-fitting fuel cell stack

Technical Field

The utility model relates to a fuel cell especially relates to a pressure equipment machine for pressure equipment fuel cell stack, wherein the utility model discloses a pressure equipment machine for pressure equipment fuel cell stack can compress tightly the free flow field board of the fuel cell stack that stacks together with being set up the membrane electrode assembly between the flow field board to ensure the gas tightness between fuel cell's flow field board and the membrane electrode assembly. Further, the utility model discloses still further provide a pressure equipment subassembly for pressure equipment fuel cell stack.

Background

A fuel cell is a power generation device that directly converts chemical energy in fuel into electrical energy through an electrochemical reaction. However, a single fuel cell (or fuel cell) can provide a lower voltage and lower output power. In practical applications, a plurality of fuel cells are generally stacked together to form a fuel cell stack capable of achieving high voltage and high power output. Accordingly, a fuel cell stack of a fuel cell is formed by stacking a plurality of fuel cell cells together.

The fuel cell stack of the fuel cell needs to maintain stable structure during use so as to ensure that the fuel cell maintains stable and continuous power output. The fuel cell stack of the existing fuel cell is usually fixed together by fastening means, such as screw fixing, the fuel cell units of the stacked fuel cell stack. However, when the fuel cells stacked together simply are directly fixed together, uneven stress is easily applied to each part of the fuel cell stack. The uneven stress on each part of the fuel cell stack may affect the sealing performance and the power transmission performance of the fuel cell stack, and ultimately the power output of the fuel cell stack. In addition, the uneven stress on each part of the fuel cell stack may cause the flow field plate of the fuel cell stack to deform due to the local over-stress, and even cause the damage of the proton exchange membrane, which results in the failure of the fuel cell stack. Therefore, the conventional fuel cell stack often needs to be pressed by a pressing machine before being fixed, so that the fuel cells of the fuel cell stack are tightly stacked together to ensure the sealing performance of the fuel cell stack.

Chinese utility model patent with application number CN 201811117476.8 discloses an automatic fuel cell stacking device, wherein this automatic fuel cell stacking device includes a stacking mechanism, a moving-out mechanism, a manipulator and a control mechanism, and this automatic fuel cell stacking device moves at the guide rail of workstation 11 through the pressure stack frame 14 accessible setting of this stacking mechanism to make the tightening frame 144 of the pressure stack frame 14 of this stacking mechanism align with the fuel cell stack of the mount table 12 of this stacking mechanism and compress tightly the fuel cell stack of the mount table 12 of this stacking mechanism. The fuel cell automatic stacking device has a plurality of defects when being used for press mounting of the fuel cell stack: first, the stacker frame 14 of the stacker mechanism is movable along a guide rail provided on the table 11, so that the direction of the downward pressing force provided by the press 143 of the stacker frame 14 of the stacker mechanism is likely to change. Even if the direction of the downward pressing force provided by the press 143 of the stacker frame 14 of the stacking mechanism is slightly changed, it is easy to cause uneven force application to the fuel cell stack disposed on the mounting table 12 of the stacking mechanism. In particular, when the automated fuel cell stacking apparatus is used for a long period of time, the direction of the downward pressure applied by the press 143 of the stack pressing frame 14 of the stacking mechanism is more likely to change. Second, the downward pressure provided by the press 143 of the stacker frame 14 of the loader mechanism needs to be transmitted to the take-up frame 144 through the press rod 148. The pressure is transmitted through the two pressure rods 148, and when the pressure rods 148 are shaken, the direction of the downward pressure is likely to be changed. Secondly, the downward pressure provided by the press 143 of the stack frame 14 of the stacking mechanism is not transmitted to the tightening frame 144 through a plane, and the contact surface between the tightening frame 144 and the fuel cell stack is not a plane, but needs to be transmitted to the fuel cell unit 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 144, the part of the tightening frame 144 away from the contact part of the pressure rod 148 and the pressure rod 148 is easy to be subjected to lever action, so that the pressing action is weakened and the stress of the fuel cell stack is uneven. Thirdly, the fuel cell automatic stacking device also corrects the alignment of the flow field plates of the fuel cell stack through the tightening pulley 149 and the positioning column 133 when the fuel cell stack is pressed. In essence, the proton exchange membrane is made of flexible material, and when the fuel cell automated stacking apparatus corrects the alignment of the flow field plates of the fuel cell stack by tightening the pulleys 149 and the positioning posts, the friction between the flow field plates or the bipolar plates of the fuel cells and the proton exchange membrane can easily cause the dislocation of the proton exchange membrane and the flow field plates of the fuel cells, or even cause the damage of the proton exchange membrane. Moreover, by tightening the interference between the pulleys 149 and the positioning posts 133, precise alignment between the flow field plates or bipolar plates of the fuel cell cells is not possible. Furthermore, the stack pressing action of the stack pressing frame 14 of the stack loading mechanism on the fuel cell stack needs to be realized through the cooperation between the tightening frame 144 and the positioning column 133. The size and the shape of the flow field plate of the fuel cell stack are limited, and the universality of the fuel cell automatic stacking device is reduced. Finally, the fuel cell automated stacking apparatus lacks detection of the downward pressure provided by the press 143 of the stacker frame 14 of the stacking mechanism. To achieve proper compression of the fuel cell stack, the amount of downward pressure to compress the fuel cell stack needs to be controlled. The downward pressure provided by the press 143 of the stack frame 14 of the stacking mechanism is too small, which makes it difficult to press the fuel cell stack, and the downward pressure provided by the press 143 of the stack frame 14 of the stacking mechanism is too large, which may cause the flow field plates and the bipolar plates of the fuel cell stack to be crushed.

SUMMERY OF THE UTILITY MODEL

The utility model has the main advantage of providing a pressure equipment machine for pressure equipment fuel cell stack, wherein the utility model is used for pressure equipment fuel cell stack's pressure equipment machine can compress tightly the free flow field board of the fuel cell stack that stacks together with being set up the membrane electrode assembly between the flow field board to ensure fuel cell's flow field board and the gas tightness between the membrane electrode assembly.

Another advantage of the present invention is to provide a press-fitting machine for press-fitting a fuel cell stack, wherein the utility model discloses a press-fitting machine for press-fitting a fuel cell stack can accurately detect the downward pressure that this system applyed at the fuel cell stack to ensure that the downward pressure that the fuel cell stack bore is in predetermineeing the within range and ensuring that the fuel cell stack is correctly press-fitted.

Another advantage of the present invention is to provide a press-fitting machine for press-fitting a fuel cell stack, wherein the utility model discloses a frame of the press-fitting machine for press-fitting a fuel cell stack is fixed on the frame of this system, in order to ensure the utility model discloses a direction of the downward pressure that the press-fitting machine for press-fitting a fuel cell stack provided is perpendicular downwards.

Another advantage of the present invention is to provide a press-fitting machine for press-fitting a fuel cell stack, wherein the utility model discloses a downward pressure that the press-fitting machine for press-fitting a fuel cell stack provided is exerted at the fuel cell stack through the pressure plate to ensure the even atress of each part homoenergetic of fuel cell stack. In other words, the utility model discloses a pressure equipment machine for pressure equipment fuel cell stack carries out the pressure equipment to fuel cell stack through a continuous application of force plane when pressure equipment fuel cell stack to ensure that each part atress of fuel cell stack is even.

Another advantage of the present invention is to provide a press-fitting assembly for press-fitting a fuel cell stack, wherein the utility model discloses a press-fitting assembly for press-fitting a fuel cell stack can accurately detect the downward pressure that this system applyed at the fuel cell stack to ensure that the downward pressure that the fuel cell stack bore is in predetermineeing the within range and ensuring that the fuel cell stack is correctly press-fitted.

Another advantage of the present invention is to provide a press-fitting assembly for press-fitting a fuel cell stack, wherein the utility model is used for the press-fitting machine of press-fitting a fuel cell stack or the downward pressure accessible that the press-fitting machine provided the utility model is used for the pressure plate of the press-fitting assembly of press-fitting a fuel cell stack is exerted at the fuel cell stack to ensure the even atress of each part homoenergetic of fuel cell stack.

The other advantages and features of the invention will be fully apparent from the following detailed description and realized by means of the instruments and combinations particularly pointed out in the appended claims.

According to the utility model discloses an aspect, can realize aforementioned purpose and other purposes and advantage the utility model discloses a pressure equipment subassembly for pressure equipment fuel cell stack includes:

a platen;

a first pressure transmitter; and

a pressure sensor, wherein the first pressure conduction member is disposed between the pressing plate and the pressure sensor, wherein the pressure sensor comprises a pressure conduction part and a pressure sensing part, wherein the pressure sensing part is disposed downward, and the pressure sensing part extends and protrudes downward from the pressure conduction part, wherein the pressure sensor, the first pressure conduction member and the pressing plate are disposed from top to bottom along a vertical direction, wherein the press-fitting assembly is disposed to have a press-fitting state and a suspension 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 conduction member of the press-fitting assembly under the action of an appropriate downward pressure, so that the pressure sensor can detect the magnitude of pressure applied to the pressing plate of the press-fitting assembly; when the press-fitting assembly is in a suspended state, the pressure sensing part of the pressure sensor is separated from the first pressure conduction piece of the press-fitting assembly.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.

Drawings

Fig. 1 is a perspective view of a press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention, wherein the press-fitting machine for press-fitting a fuel cell stack of the present invention is capable of press-fitting a fuel cell stack as shown in the figure.

Fig. 2 is another perspective view of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention described above.

Fig. 3A is a perspective view of a press-fitting assembly of a press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack is not pressed against the fuel cell stack.

Fig. 3B is another perspective view of the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack is pressed against the fuel cell stack.

Fig. 4A is a cross-sectional view of a press-fitting assembly of a press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack is not pressed against the fuel cell stack.

Fig. 4B 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 embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack is pressed against the fuel cell stack.

Fig. 5 is an assembly view of the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention described above.

Fig. 6A is a partial cross-sectional view of a press-fitting assembly of a press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack is not pressed against the fuel cell stack.

Fig. 6B is a partial cross-sectional view of the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention, wherein the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack is pressed against the fuel cell stack.

Fig. 7 is a sectional view of the second pressure conduction member of the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention described above.

Fig. 8 is a bottom view of the pressing plate of the press-fitting assembly of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention.

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

Fig. 10 shows an alternative implementation of a pressure sensor for a press-fitting assembly of a press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention described above.

Fig. 11A and 11B show an alternative implementation of a press-fitting assembly of a press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 10 of the drawings attached to the present specification, a press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention is illustrated, wherein the press-mounting machine for press-mounting the fuel cell stack comprises a machine base 10, a machine frame 20, a supporting platform 30, a power device 40 and a press-mounting assembly 60, wherein the frame 20 is provided on the base 10, the pallet 30 is provided on the frame 20, the power unit 40 is provided on the pallet 30, wherein the power device 40 is configured to provide a downward pressure and an upward lift force to the press-fitting assembly 60, wherein the press-fitting assembly 60 is adapted to press-fit the fuel cell stack 1, which is placed between the housing 10 and the press-fitting assembly 60, under a downward pressure provided by the power unit 40, and to be suspended under an upward lift provided by the power unit 40. Preferably, the frame 20 is fixed to the housing 10 so that the downward pressure provided by the power unit 40 is smoothly transmitted to the press-fitting assembly 60.

As shown in fig. 1 and 2 of the drawings, the frame 20 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention includes four columns 21, wherein each column 21 includes a lower end 211 and an upper end 212 extending upward from the lower end, wherein the lower end 211 of the column 21 is fixed to the frame 10, and the pallet 30 is fixed to the upper end 212 of the column 21. In other words, the pallet 30 is supported on the column 21 of the frame 20. Preferably, the pallet 30 is horizontally supported on the column 21 of the stand 20. More preferably, the pillars 21 of the housing 20 are fixed to four corners of the frame 10, respectively.

As shown in fig. 1 and fig. 2 of the drawings, the power device 40 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention includes 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 (to move away from the servo motor 41 or toward the fuel cell stack) and backward (to move toward the servo motor 41 or away from the fuel cell stack) and controls the magnitude of the downward pressure according to the control command. Further, the press-fitting 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 the upward lift provided by the power unit 40, thereby reciprocating the press-fitting assembly 60 in the vertical direction.

As shown in fig. 1 and 2 of the drawings, the machine base 10 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention includes a machine body 11 and a table 12 horizontally disposed on the machine body 11, wherein the machine frame 20 is disposed on the machine body 11. Preferably, the table 12 is movably disposed at the body 11 to facilitate an operation of an operator. More preferably, the table 12 forms a horizontal operation surface 121 so that the fuel cell stack 1 can be horizontally placed on the table 12, and facilitates press-fitting of the fuel cell stack 1 by the press-fitting machine of the present invention for press-fitting the fuel cell stack.

As shown in fig. 1 and fig. 2 of the drawings, the machine body 11 of the machine base 10 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention forms a slide rail 111, and the worktable 12 forms a slide groove 120, wherein the worktable 12 is slidably disposed on the slide rail 111 through the slide groove 120, so that the worktable 12 is slidably disposed on the machine body 11. Alternatively, the sliding rail 111 may be a component or element fixedly disposed on the body 11. It is understood that the working platform 12 is slidably disposed on the machine body 11, and may be implemented in other manners. For example, the working platform 12 forms the sliding rail 111, and the sliding slot 120 is formed by the body 11.

It should be noted that, for the convenience of the operator, the horizontal operation surface 121 of the working platform 12 is located at a position higher than the top of the machine body 11 of the machine base 10.

As shown in fig. 1 to 5 of the drawings, according to the embodiment of the present invention, the press-fitting component 60 of the press-fitting machine for press-fitting a fuel cell stack is connected to the piston 421 of the electric cylinder 42 of the power device 40, and the press-fitting component 60 forms a press-fitting plane 601 facing right below the press-fitting component, so that the press-fitting component 60 can press-fit the fuel cell stack 1 under the action of the downward pressure provided by the electric cylinder 42. Preferably, the press-fitting plane 601 is disposed horizontally and is a continuous plane, so that the downward pressure can be uniformly applied to the force-receiving portion of the fuel cell stack 1 through the press-fitting assembly 60.

As shown in fig. 1 and 2 of the drawings, the press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention further includes two orientation bars 70, wherein the orientation bars 70 are respectively disposed on the pallet 30, and the orientation bars 70 are disposed to be capable of reciprocating up and down relative to the pallet 30. Further, the two ends 61 of the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack of the present invention are respectively disposed at the orientation bars 70 to keep the press-fitting plane 601 of the press-fitting assembly 60 horizontal. In other words, the orientation bar 70 is used to keep the press-fitting plane 601 of the press-fitting assembly 60 horizontal at all times. Further, the directional lever 70 is provided to be capable of moving in synchronization with the piston 421 of the electric cylinder 42.

As shown in fig. 3A to 9 of the drawings, the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention includes a press plate 61, a first pressure conduction member 62, and a pressure sensor 63 disposed at the piston 421 of the electric cylinder 42, wherein the first pressure conduction member 62 is disposed between the press plate 61 and the pressure sensor 63, wherein the pressure sensor 63 includes a pressure conduction 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 conduction portion 631, wherein the pressure sensor 63, the first pressure conduction member 62, and the press plate 61 are disposed vertically from top to bottom, wherein the press-fitting assembly 60 is disposed to have a press-fitting state and a suspended state, wherein when the press-fitting assembly 60 is in the press-fitting state, the pressure sensing portion 632 of the pressure sensor 63 is pressed against the first pressure conduction member 62 of the press-fitting 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 applied to the pressing plate 61 of the press-fitting assembly 60 and the magnitude of the downward pressure applied to the pressing plate 61 of 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-fitting machine of the present invention can press-fit the fuel cell stack 1 through the pressing plate 61. Further, when the press-fitting assembly 60 is in a suspended state, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure conduction member 62 of the press-fitting assembly 60 move upward synchronously and are separated from the pressure plate 61, so as to prevent the pressure sensor 63 from being touched by the first pressure conduction member 62 by mistake and causing the pressure sensor 63 to generate an erroneous detection result. At this time, the relative positions of the first pressure transmitter 62 and the pressure sensing portion 632 of the pressure sensor 63 are kept fixed. In other words, when the press-fitting assembly 60 is in a suspended state, the first pressure conduction member 62 of the press-fitting assembly 60 and the pressing plate 61 form a spacing space therebetween, so that the first pressure conduction member 62 of the press-fitting assembly 60 and the pressing plate 61 are spaced apart, thereby preventing the pressure sensor 63 from being touched by the first pressure conduction member 62 by mistake and generating a false detection result. In addition, when the press-fitting assembly 60 is in a suspended state, the first pressure conduction member 62 of the press-fitting assembly 60 is kept separated from the pressing plate 61. Accordingly, the first pressure conduction member 62 of the pressure sensor 63 is in contact with the pressure plate 61 and conducts the pressure applied thereto to the pressure sensing portion 632 of the pressure sensor 63 only when the press-fitting assembly 60 press-fits the fuel cell stack 1. Accordingly, in this way, a false contact between the pressure sensor 63 and the first pressure conductor 62 is avoided. It can be understood that the pressure sensing portion 632 of the pressure sensor 63 is electrically connected to the control module of the control unit 90 of the press-fitting machine 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.

It should be noted that, since the pressing plate 61 of the pressing assembly 60 of the pressing machine for pressing a fuel cell stack according to the present invention frequently presses the fuel cell stack 1, the pressing plate 61 of the pressing assembly 60 should have a certain hardness, so that the pressing plate 60 is deformed and it is difficult to provide a downward pressure to the fuel cell stack 1 uniformly. In addition, in order to prevent the pressing plate 60 from being deformed, the pressing plate 61 of the press-fitting assembly 60 should have an appropriate thickness. Preferably, the press plate 61 of the press-fitting assembly 60 is made of a material having a Rockwell hardness of not less than HRC 45. More preferably, the press-fitting plate 61 of the press-fitting assembly 60 is made of a metallic material having Rockwell hardness of not less than HRC 45.

As shown in fig. 1 and fig. 2 of the drawings, the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention further transmits the downward pressure and the upward lifting force generated by the power device 40 to the press-fitting assembly 60 through a pressure transmission guide pillar, wherein one end of the pressure transmission guide pillar is connected to the piston 421 of the electric cylinder 42 of the power device 40, and the other end of the pressure transmission guide pillar is connected to the press-fitting assembly 60, wherein the power device 40 is configured to provide the downward pressure, and the pressure transmission guide pillar is adapted to transmit the downward pressure provided by the power device 40 to the press-fitting assembly 60. Further, the power device 40 can provide an upward lifting force to lift the press-fitting assembly 60 upward and keep the press-fitting assembly 60 in a suspended state. Accordingly, when the press-fitting assembly 60 is in the press-fitting state, the pressure sensing portion 632 of the pressure sensor 63 is pressed against the first pressure conduction member 62 of the press-fitting assembly 60 by the pressure conduction column 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 applied to the pressure plate 61 of the press-fitting assembly 60 and the magnitude of the downward pressure applied to the pressure plate 61 of the fuel cell stack 1. However, the pressure-transmitting post may be provided integrally with the piston 421. At this time, the pressure transmission pillar may be regarded as a part of the piston 421.

As shown in fig. 3A to 9 of the drawings, the pressing plate 61 of the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention includes a pressure-receiving portion 611 and a pressure-applying portion 612 fixed to the pressure-receiving portion 611. It will be appreciated that the bottom of the press plate 61 of the press-fitting assembly 60 forms the press-fitting plane 601. More specifically, the bottom of the pressing portion 612 of the pressing plate 61 of the press-fitting assembly 60 forms the press-fitting plane 601. Therefore, the pressing portion 612 of the pressing plate 61 of the press-fitting assembly 60 should have certain hardness. Preferably, the pressing portion 612 of the pressing plate 61 of the press-fitting assembly 60 is made of a material having a rockwell hardness of not less than HRC 45. More preferably, the pressing portion 612 of the pressing plate 61 of the press-fitting assembly 60 is made of a metal material having a rockwell hardness of not less than HRC 45. The pressing portion 612 of the pressing plate 61 of the press-fitting assembly 60 is preferably detachably fixed to the pressing portion 611 of the pressing plate 61 so that the pressing portion 612 can be replaced. Further, the length of the pressure receiving portion 611 of the pressure plate 61 of the press-fitting assembly 60 is preferably greater than the length of the pressing portion 612, and the two orientation bars 70 are respectively disposed at both ends of the pressure receiving portion 611.

As shown in fig. 3A to 9 of the drawings, the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention further includes a second pressure conduction member 64, wherein the second pressure conduction member 64 is disposed between the pressing plate 61 and the pressure conduction portion 631 of the pressure sensor 63, when the press-fitting assembly 60 is in the press-fitting state, the pressure conduction portion 631 of the pressure sensor 63 is pressed against the second pressure conduction member 64 of the press-fitting 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 pressing plate 61 of the press-fitting assembly 60 through the piston 421, so that the pressing plate 61 of the press-fitting assembly 60 can press-fit the fuel cell stack 1. In other words, when the press-fitting assembly 60 is in the press-fitting state, the downward pressure generated by the electric cylinder 42 is transmitted to the pressure sensor 63 through the piston 421, the pressure sensor 63 is transmitted to the second pressure transmitter 64 and the first pressure transmitter 62 through the pressure transmitter 631 and the pressure sensor 632, respectively, and the first pressure transmitter 62 and the second pressure transmitter 64 further transmit the downward pressure to the pressing plate 61 of the press-fitting assembly 60, so that the pressing plate 61 of the press-fitting assembly 60 can press-fit the fuel cell stack 1.

It should be noted that, as shown in fig. 3A to 9 of the drawings, the second pressure conduction member 64 of the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention is fixed to the pressure conduction portion 631 of the pressure sensor 63, so that the second pressure conduction member 64 can move synchronously with the pressure sensor 63. Accordingly, the second pressure conduction member 64 is disposed between the pressing plate 61 and the pressure conduction portion 631 of the pressure sensor 63, so that the contact surface between the pressing plate 61 of the press-fitting assembly 60 and the downward pressure generated by the electric cylinder 42 is increased, and the downward pressure generated by the electric cylinder 42 is transmitted to the pressing plate 61 of the press-fitting assembly 60 through the piston 421 and the pressure sensor 63, so that the downward pressure generated by the electric cylinder 42 can be transmitted to the pressing plate 61 of the press-fitting assembly 60 more smoothly, and the pressure applied to the fuel cell stack is more uniform in size distribution. Thus, the first pressure transmitter 62 and the second pressure transmitter 64 are preferably block-shaped. More preferably, the first pressure transmitter 62 is preferably cylindrical and the second pressure transmitter 64 is preferably mesa-shaped. Preferably, the second pressure transmitter 64 is configured to reciprocate within a predetermined distance D with respect to the pressure plate 61, wherein the predetermined distance D is 0.1mm to 0.5 mm.

As shown in fig. 3A to 9 of the drawings, the pressure conducting part 631 of the pressure sensor 63 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention forms a receiving cavity 6310, the second pressure conducting member 64 forms a through hole 640, wherein the pressure sensing part 632 is disposed in the receiving cavity 6310, the first pressure conducting member 62 is disposed in the through hole 640 of the second pressure conducting member 64, the pressure conducting part 631 of the pressure sensor 63 faces the second pressure conducting member 64, the pressure sensing part 632 of the pressure sensor 63 faces the first pressure conducting member 62, so that after the downward pressure generated by the electric cylinder 42 is transmitted to the pressure sensor 63 through the piston 421, the pressure sensor 63 can be respectively transmitted to the second pressure conducting member 64 and the first pressure conducting member 62 through the pressure conducting part 631 and the pressure sensing part 632 thereof, the first pressure transmitter 62 and the second pressure transmitter 64 can further transmit downward pressure to the pressing plate 61 of the press-fitting assembly 60, and enable the pressing plate 61 of the press-fitting assembly 60 to press-fit the fuel cell stack 1. Correspondingly, when the piston 421 of the electric cylinder 42 moves downward, so that the pressure sensor 63 and the second pressure transmitter 64 move downward until the pressure plate 61 presses against the fuel cell stack 1, the pressure sensing portion 632 of the pressure sensor 63 presses against the first pressure transmitter 62, and the second pressure transmitter 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 through the piston 421, the pressure sensor 63, the first pressure transmitter 62, the second pressure transmitter 64, and the pressure plate 61; when the fuel cell stack 1 is completely pressed, the pressure sensor 63 and the second pressure transmitter 64 are moved upward by the piston 421 of the electric cylinder 42, and the pressure sensor 63 is separated from the first pressure transmitter 62. Optionally, an end of the first pressure conductor 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 to be able to detect a static pressure. Most preferably, the pressure sensing portion 632 has an annular cross-section.

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

As shown in fig. 3A to 9 of the drawings, the pressing plate 61 of the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention further forms a receiving chamber 6110, wherein the pressure-receiving end 622 of the first pressure-transmitting member 62 is adapted to be disposed in the receiving chamber 6110. Further, the receiving chamber 6110 is formed at the pressure receiving portion 611 of the pressure plate 61, so that the pressure receiving end 622 of the first pressure conductive member 62 can directly act on the pressure applying portion 612 of the pressure plate 61. Correspondingly, the second pressure transmitter 64 is adapted to act directly on the pressure-receiving portion 611 of the pressure plate 61.

As shown in fig. 3A to 9 of the drawings, the press-fitting assembly 60 of the press-fitting machine for press-fitting a fuel cell stack according to the embodiment of the present invention further includes two holding members 65, wherein each of the holding members 65 includes a lower end portion 651 and an upper end portion 652 extending upward from the lower end portion 651, wherein the lower end portions 651 of the two holding members 65 are respectively fixed to the pressing plate 61, and the upper end portions 652 of the two holding members 65 are respectively slidably disposed at both sides of the second pressure transmitter 64. Preferably, the retainer 65 is L-shaped. Further, the height of the high end 652 of the holder 65 is h, and the distance D that the holder 65 slides relative to the second pressure transmitter 64 is not more than h.

As shown in fig. 3A to 9 of the drawings, the high end portion 652 of each of the holding members 65 of the press-fitting assembly 60 for press-fitting a fuel cell stack according to the embodiment of the present invention forms a sliding groove 6520, and the second pressure conduction member 64 forms two engaging portions 641, wherein the engaging portions 641 are respectively disposed at both sides of the second pressure conduction member 64, and the engaging portions 641 are disposed to be slidably engaged with the sliding grooves 6520 of the high end portion 652 of the holding member 65. Further, the sliding groove 6520 of the high end portion 652 of the holder 65 is disposed to extend at the top end of the high end portion 652 of the holder 65 and the low end portion 651 of the holder 65, so that the high end portion 652 of the holder 65 forms a hook 6521, wherein when the fuel cell stack 1 is press-fitted, the pressure sensor 63 and the second pressure conduction member 64 are moved upward by a predetermined distance D by the piston 421 of the electric cylinder 42, and each of the holders 65 can be hung on the second pressure conduction member 64 by the hook 6521 formed at the high end portion 652 thereof. At this point, the press plate 61 of the press-fitting assembly 60 no longer provides any downward pressure. It can be understood that, when the press-fitting assembly 60 is in the suspended state, the spacing distance between the pressure sensing portion 632 of the pressure sensor 63 and the first pressure transmission element 62 is the same as the predetermined distance D. It should be noted that the holding member 65 and the second pressure conduction member 64 hold the pressing plate 61, the first pressure conduction member 62, the holding member 65 and the second pressure conduction member 64 of the press-fitting assembly 60, and they can form an organic whole in both the press-fitting state and the suspended state.

As shown in fig. 1 to 9 of the drawings, according to an embodiment of the present invention, there is further provided a press-fitting assembly 60 for press-fitting a fuel cell stack, wherein the press-fitting assembly 60 includes a pressing plate 61, a first pressure conduction member 62 and a pressure sensor 63, wherein the first pressure conduction member 62 is disposed between the pressing plate 61 and the pressure sensor 63, wherein the pressure sensor 63 includes a pressure conduction portion 631 and a pressure sensing portion 632, wherein the pressure sensing portion 632 is disposed downward, and the pressure sensing portion 632 extends downward and protrudes from the pressure conduction portion 82, wherein the pressure sensor 63, the first pressure conduction member 62 and the pressing plate 61 are disposed vertically from top to bottom, wherein the press-fitting assembly 60 is disposed to have a press-fitting state and a suspension state, wherein when the press-fitting assembly 60 is in the press-fitting state, the pressure sensing portion 632 of the pressure sensor 63 is pressed against the first pressure conduction member 62 of the press-fitting assembly 60 under the action of a proper downward pressure, so that the pressure sensor 63 can detect the magnitude of the pressure applied to the pressing plate 61 of the press-fitting assembly 60 and the magnitude of the downward pressure applied to the pressing plate 61 of the fuel cell stack 1. Further, when the press-fitting assembly 60 is in a suspended state, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure conduction member 62 of the press-fitting assembly 60 are suspended synchronously, so as to prevent the pressure sensor 63 from being touched by the first pressure conduction member 62 by mistake and causing the pressure sensor 63 to generate an erroneous detection result. At this time, the first pressure transmitter 62 is held between the pressure sensing portion 632 of the pressure sensor 63 and the pressure plate 61. In other words, when the press-fitting assembly 60 is in a suspended state, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure conduction member 62 of the press-fitting assembly 60 form a space therebetween, so that the pressure sensing portion 632 and the first pressure conduction member 62 of the press-fitting assembly 60 are separated, thereby preventing the pressure sensor 63 from being erroneously touched by the first pressure conduction member 62 and generating an erroneous detection result. In addition, when the press-fitting 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 pressure plate 61. Accordingly, the pressure sensing portion 632 of the pressure sensor 63 and the first pressure conduction member 62 of the press-fitting assembly 60 are in contact only when the fuel cell stack 1 is press-fitted, and the detection error can be further prevented.

Fig. 10 of the drawings shows an alternative implementation of the pressure sensor 63 of a press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention, wherein the pressure sensor 63A includes a pressure conducting portion 631 and at least three pressure sensing portions 632A respectively extending from the pressure conducting portion 631, wherein the pressure sensing portions 632A are disposed at intervals. It can be understood that since the pressure sensing portions 632A of the pressure sensor 63A are disposed at three mutually spaced positions, the pressure sensed by the pressure sensing portions 632A of the pressure sensor 63A is also different when the fuel cell stack 1 is subjected to uneven pressure of the pressure plate 61 of the press-fitting assembly 60. In other words, when the pressures sensed by the pressure sensing portions 632A of the pressure sensors 63A are different, different portions of the fuel cell stack 1 are subjected to different pressures of the pressure plate 61 of the press-fitting assembly 60. In this way, it is possible to detect whether the different portions of the fuel cell stack 1 are uniformly pressed by the pressing plates 61 of the press-fitting assembly 60.

Fig. 11A and 11B of the drawings illustrate an alternative implementation of the press-fitting assembly 60 of a press-fitting machine for press-fitting a fuel cell stack according to an embodiment of the present invention, wherein both sides of the second pressure-conducting member 64A of the press-fitting assembly 60A are respectively formed with a sliding groove 640A, and the high end portion 652A of each of the holding members 65A is formed with an engaging portion 6521A, wherein the engaging portion 6521A formed by the high end portion 652A of the holding member 65A is configured and adapted to slidably engage with the sliding groove 640A of the second pressure-conducting member 64A. Further, the sliding grooves 640A of the second pressure transmission member 64A are disposed to extend on both sides of the second pressure transmission member 64A, so that a hook 641A is formed on each of both sides of the second pressure transmission member 64A, wherein when the fuel cell stack 1 is completely press-fitted, and the pressure sensor 63 and the second pressure transmission member 64A are moved upward by the piston 421 of the electric cylinder 42, each of the holding members 65A can be hung on the second pressure transmission member 64A through the sliding grooves 640A formed on both sides thereof. It should be noted that the holding member 65A and the second pressure conduction member 64A hold the pressing plate 61, the first pressure conduction member 62, the holding member 65A and the second pressure conduction member 64A of the press-fitting assembly 60, and they can form an organic whole regardless of the press-fitting state or the suspended state.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished.

The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (15)

1. A press-fitting assembly for press-fitting a fuel cell stack, comprising:

a platen;

a first pressure transmitter; and

a pressure sensor, wherein the first pressure conduction member is disposed between the pressing plate and the pressure sensor, wherein the pressure sensor comprises a pressure conduction part and a pressure sensing part, wherein the pressure sensing part is disposed downward, and the pressure sensing part extends and protrudes downward from the pressure conduction part, wherein the pressure sensor, the first pressure conduction member and the pressing plate are disposed from top to bottom along a vertical direction, wherein the press-fitting assembly is disposed to have a press-fitting state and a suspension 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 conduction member of the press-fitting assembly under the action of an appropriate downward pressure, so that the pressure sensor can detect the magnitude of pressure applied to the pressing plate of the press-fitting assembly; when the press-fitting assembly is in a suspended state, the pressure sensing part of the pressure sensor and the first pressure conduction piece of the press-fitting assembly are suspended synchronously.

2. A press-fitting assembly according to claim 1, further comprising a second pressure-conducting member, wherein the second pressure-conducting member is disposed between the pressing plate and the pressure-conducting portion of the pressure sensor, wherein when the press-fitting assembly is in the press-fitting state, the pressure-conducting portion of the pressure sensor is pressed against the second pressure-conducting member of the press-fitting assembly by the downward pressure, so that the downward pressure is transmitted to the pressing plate of the press-fitting assembly.

3. A press-fitting assembly according to claim 2, wherein the pressure-transmitting portion of the pressure sensor defines a receiving cavity and the second pressure-transmitting member defines a through-hole, wherein the pressure-sensing portion is disposed in the receiving cavity, the first pressure-transmitting member is disposed in the through-hole of the second pressure-transmitting member, and the pressure-transmitting portion of the pressure sensor faces the second pressure-transmitting member, and the pressure-sensing portion of the pressure sensor faces the first pressure-transmitting member.

4. A press-fitting assembly according to claim 3, further comprising two holding members, wherein each of the holding members 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 holding members are respectively fixed to the pressing plate, and the higher end portions of the two holding members are respectively slidably disposed on both sides of the second pressure-transmitting member.

5. A press-fitting assembly according to claim 4, wherein the high end of the retainer has a height h, and the retainer slides relative to the second pressure conduction member by a distance D of no more than h.

6. A press-fitting assembly according to claim 4, wherein said high end portion of each of said holding members defines a slide groove, and said second pressure-transmitting member defines two engaging portions, wherein said engaging portions are respectively provided on both sides of said second pressure-transmitting member, and wherein said engaging portions are provided so as to be adapted to slidably engage with said slide grooves of said high end portion of said holding member.

7. A press-fitting assembly according to claim 6, wherein said slide groove of said high end portion of said retainer is arranged to extend at a top end of said high end portion of said retainer and at said low end portion of said retainer, so that said high end portion of said retainer forms a hook.

8. A press-fitting assembly according to claim 4, wherein the second pressure-transmitting member of the press-fitting assembly is formed with a slide groove on each side thereof, and the high end portion of each of the holding members is formed with an engaging portion, wherein the engaging portion formed at the high end portion of the holding member is adapted to slidably engage with the slide groove of the second pressure-transmitting member.

9. A press-fitting assembly according to claim 8, wherein the runners of the second pressure conduction member are arranged to extend on both sides of the second pressure conduction member, so that a hook is formed on each of both sides of the second pressure conduction member.

10. A press-fitting assembly according to claim 1, 2, 4, 5, 6, 7, 8 or 9, wherein the first pressure conduction member of the press-fitting assembly has a pressure conduction end facing the pressure sensor and a pressure receiving end facing the pressure plate, and wherein when the press-fitting assembly is in the press-fitting state, the pressure sensing portion of the pressure sensor is pressed against the pressure conduction end of the first pressure conduction member of the press-fitting assembly by the downward pressure.

11. A press-fitting assembly according to claim 3, wherein the first pressure-transmitting member of the press-fitting assembly has a pressure-transmitting end facing the pressure sensor and a pressure-receiving end facing the pressure plate, and wherein when the press-fitting assembly is in the press-fitting state, the pressure-sensing portion of the pressure sensor is pressed against the pressure-transmitting end of the first pressure-transmitting member of the press-fitting assembly by the downward pressure.

12. A press-fitting assembly according to claim 11, wherein said first pressure-conducting member has a securing portion extending upwardly from said pressure-conducting end, wherein said securing portion is adapted to be received in said receiving cavity of said pressure-conducting portion of said pressure sensor.

13. A press-fitting assembly according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the pressure sensor is an eddy current pressure sensor.

14. A press-fitting assembly according to claim 2, 3, 4, 5, 6, 7, 8 or 9, wherein said second pressure-conducting member of the press-fitting assembly is secured to said pressure-conducting portion of the pressure sensor.

15. A press-fitting assembly according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein said press-fitting plate defines a press-fitting plane, wherein said press-fitting plane is a continuous plane and is disposed horizontally.

Images