Fastening Device and Production Line for Fuel Cell Stack

Abstract

The present invention provides a fastening device and a production line for a fuel cell stack, relating to the technical field of fuel cells. The production line includes the fastening device for the fuel cell stack. The fastening device for the fuel cell stack includes a winding mechanism, a fastening mechanism, a rack, a gear, a pneumatic tensioner, and a tension sensor. The winding mechanism is used for winding a strap and has a limiting effect on the strap. The fastening mechanism is used for fastening the end of the strap. One end of the tension sensor is connected to the fastening mechanism, and the tension sensor can monitor the tension of the wound strap. The rack is connected to the fastening mechanism, the gear is used for meshing with the rack, and the pneumatic tensioner is connected to the gear. The pneumatic tensioner is used for driving the gear to rotate according to the tension detected by the tension sensor, so as to drive the strap to be tightened on the winding mechanism. The fastening device for the fuel cell stack is applicable to fastening various fuel cell stacks, and can reduce the volume of the fuel cell stack, improve the fastening efficiency and consistency of the fuel cell stack.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular, to a fastening device and a production line for a fuel cell stack. Background Art

[0002] A fuel cell is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy. Bipolar plates, membrane electrode assemblies, current collectors, and end plates are important components in a fuel cell stack. The bipolar plates are used to distribute fuel, conduct electricity, and support the membrane electrode assembly, and the membrane electrode assembly is the place where the electrochemical reaction occurs. After the bipolar plates and the membrane electrode assemblies are repeatedly stacked in series, they form an integral body with the current collectors and end plates placed at both ends, and are pressed tightly under a certain external pressure to obtain a fastened fuel cell stack, simply referred to as a stack.

[0003] There are generally two methods for fastening the stack. One method is to tighten with a screw and lock with a nut. This structure and design are relatively simple, but it increases the volume of the stack, which is not conducive to the miniaturization of fuel cells and the improvement of volume power density. Another method is to weld an interface structure at the end of the stack fastener and fasten it with bolts and nuts, which is relatively convenient to use; the disadvantage of this method is that each fastener is only applicable to a stack of one height.

[0004] Therefore, designing a fastening device for a fuel cell stack that can reduce the volume of the stack, improve the fastening efficiency and consistency, and be applicable to fastening various stacks is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] The purpose of the present invention is to provide a fastening device and a production line for a fuel cell stack, which can reduce the volume of the stack, improve the fastening efficiency and consistency, and be applicable to fastening various stacks.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a fastening device for a fuel cell stack, where the fastening device for the fuel cell stack includes:

[0008] A winding mechanism for winding a binding band and having a limiting effect on the binding band;

[0009] A fastening mechanism for fastening the end of the binding band;

[0010] A tension sensor, one end of the tension sensor is connected to the fastening mechanism, and the tension sensor can monitor the tension of the winding binding band;

[0011] A rack connected to the belt fastening mechanism;

[0012] A gear for meshing with the rack;

[0013] A pneumatic tensioner, connected to the gear, is used to drive the gear to rotate according to the tension detected by the tension sensor, so as to drive the binding belt to tighten on the winding mechanism.

[0014] In an alternative embodiment, the fastening device of the fuel cell stack further includes:

[0015] A first pipeline, one end of the first pipeline is connected to the pneumatic tensioner;

[0016] A pressure regulating valve, connected to the other end of the first pipeline, the pressure regulating valve is used to adjust the tension value of the pneumatic tensioner, and the outlet pressure of the pressure regulating valve is adjusted according to the tension detected by the tension sensor (250).

[0017] In this way, a pressure regulating valve is provided on the pipeline of the pneumatic tensioner. The pressure regulating valve can adjust the air supply pressure of the pneumatic tensioner. The tension value of the binding belt can be measured by the tension sensor, and the tension value is fed back for adjusting the outlet pressure of the pressure regulating valve, so as to achieve the purpose of adjusting the tightening force of the binding belt.

[0018] In an alternative embodiment, the fastening device of the fuel cell stack further includes:

[0019] A bracket, connected to the rack;

[0020] A cylinder, the piston rod of the cylinder is connected to the bracket, and the cylinder is used to drive the bracket so that the rack meshes with or disengages from the gear.

[0021] In an alternative embodiment, the fastening device of the fuel cell stack further includes:

[0022] A slide rail, the rack is slidably matched with the slide rail, and the bracket is connected to the rack through the slide rail.

[0023] In an alternative embodiment, the slide rail includes:

[0024] A support frame, through holes are formed in the support frame, and the through holes are used for the rack to pass through;

[0025] Rollers, arranged at the bottom of the through holes, and the rollers are used to support the rack.

[0026] In an alternative embodiment, the winding mechanism includes:

[0027] A lower pressing plate tooling, a first groove is formed on the top surface of the lower pressing plate tooling;

[0028] An upper pressing plate tooling, a second groove is formed on the bottom surface of the upper pressing plate tooling, and the first groove and the second groove cooperate to form a hole with a hole, and the hole is used for the binding belt to pass through.

[0029] In an alternative embodiment, a boss is provided on the bottom surface of the lower platen tooling, and the boss is used to press one end of the strap.

[0030] In an alternative embodiment, the fastening device of the fuel cell stack further includes:

[0031] A pressure head is disposed on the top surface of the upper platen tooling, and the pressure head is used to apply pressure to the upper platen tooling.

[0032] In an alternative embodiment, the fastening mechanism includes:

[0033] A base;

[0034] A movable block is connected to the base by bolts, and the area formed between the movable block and the base is used to fasten the end of the strap.

[0035] In an alternative embodiment, the winding mechanism is used to wind multiple straps at one time, and the number of the fastening mechanisms, the racks, the gears, and the pneumatic tensioners is equal and plural.

[0036] In a second aspect, an embodiment of the present invention provides a production line for a fuel cell stack, and the production line includes the fastening device of the fuel cell stack according to the first aspect.

[0037] The beneficial effects of the fastening device and the production line of the fuel cell stack provided by the embodiments of the present invention include:

[0038] 1. The gear is driven to rotate by the pneumatic tensioner, the gear drives the rack to move, and the rack pulls the strap to tighten on the winding mechanism, thereby fastening the stack, and can reliably and stably drive the strap to be tightened;

[0039] 2. The driving force of the pneumatic tensioner can be measured and adjusted, so that the tightening degree of the strap can be flexibly controlled, and the tension of multiple straps is consistent;

[0040] 3. The length of the strap can be flexibly adjusted according to the height of the installed stack, which is convenient for the strap to wind stacks of various sizes, so as to be applicable to fastening multiple stacks and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 Structural schematic diagram of the fastening device for the fuel cell stack provided by the embodiment of the present invention;

[0043] Figure 2 is Figure 1 Structural schematic diagram of the winding mechanism in

[0044] Figure 3 Schematic diagram of the path of the strap winding;

[0045] Figure 4 Structural schematic diagram of the slide rail;

[0046] Figure 5 System control diagram of the fastening device for the fuel cell stack provided by the embodiment of the present invention.

[0047] Icons: 100 - Fastening device for fuel cell stack; 110 - Winding mechanism; 111 - Lower pressing plate tooling; 112 - Upper pressing plate tooling; 113 - First groove; 114 - Second groove; 115 - Boss; 120 - Pressing head; 130 - Mounting rack; 140 - Fastening mechanism; 141 - Base; 142 - Movable block; 150 - Cylinder; 160 - Bracket; 170 - Slide rail; 171 - Support frame; 172 - Roller; 180 - Rack; 190 - Gear; 200 - Pneumatic tensioner; 210 - First pipeline; 220 - Pipe joint; 230 - Pressure regulating valve; 240 - Controller; 250 - Tension sensor; 300 - Strap. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0051] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. This is 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 operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0052] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they should not be construed as indicating or implying relative importance.

[0053] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0054] The existing method of tightening the stack with screws increases the volume of the stack, which is not conducive to the miniaturization of fuel cells and the improvement of volume power density. The existing method of tightening the stack with welded fasteners can only be applied to stacks of one height, and its applicability is too poor.

[0055] Please refer to Figure 1 , this embodiment provides a fastening device 100 for a fuel cell stack, which can reduce the volume of the stack, improve the efficiency and consistency of fastening the stack, and is applicable to fastening various stacks.

[0056] The fastening device 100 for a fuel cell stack includes a tape winding mechanism 110, a pressing head 120, a mounting bracket 130, a tape fastening mechanism 140, a cylinder 150, a bracket 160, a slide rail 170, a rack 180, a gear 190, a pneumatic tensioner 200, a first pipeline 210, a pipe joint 220, a pressure regulating valve 230, and a tension sensor 250.

[0057] Among them, the winding mechanism 110 is used to wind the strap 300, and multiple straps 300 can be wound at one time. The strap 300 can be made of stainless steel or other materials. Combining Figure 2 , the tape winding mechanism 110 includes a lower pressing plate tooling 111 and an upper pressing plate tooling 112. Specifically, the pressing head 120 is arranged on the top surface of the upper pressing plate tooling 112, and the pressing head 120 is used to apply pressure to the upper pressing plate tooling 112.

[0058] The tape fastening mechanism 140 is used to fasten the end of the strap 300. The tape fastening mechanism 140 includes a base 141 and a movable block 142. The movable block 142 is connected to the base 141 by bolts. The area formed between the movable block 142 and the base 141 is used to fasten the end of the strap 300.

[0059] The rack 180 is connected to the belt fastening mechanism 140, the rack 180 is slidably engaged with the slide rail 170, the gear 190 is used to mesh with the rack 180, the pneumatic tensioner 200 is connected to the gear 190, and the pneumatic tensioner 200 is used to drive the gear 190 to rotate so as to drive the strap 300 to tighten on the belt winding mechanism 110.

[0060] One end of the first pipeline 210 is connected to the pneumatic tensioner 200, the other end of the first pipeline 210 is connected to the pressure regulating valve 230, and the pressure regulating valve 230 is connected to the air source through the pipe joint 220. The pressure regulating valve 230 adjusts the air supply pressure in real time according to the feedback signal of the tension sensor 250 and is used to adjust the tension value of the pneumatic tensioner 200. The pneumatic tensioner 200 can also be lubricated with engine oil or lubricating oil to reduce the friction force and extend the service life. In this embodiment, multiple pneumatic tensioners 200 are used in parallel, and the exhaust gas of the compressed gas is connected together through a common pipeline and guided to the outside for collection to prevent the atomized oil mist from polluting the indoor environment and the fuel cell stack.

[0061] The bracket 160 is connected to the rack 180, the piston rod of the cylinder 150 is connected to the bracket 160, the bracket 160 is connected to the slide rail 170, and the cylinder 150 is used to drive the bracket 160 so that the rack 180 meshes with or disengages from the gear 190.

[0062] The mounting bracket 130 is connected to the pressing head 120, and the pressure regulating valve 230, the pneumatic tensioner 200, and the cylinder 150 are all mounted on the mounting bracket 130. In this embodiment, the cylinder 150 is a non-oil cylinder 150.

[0063] Please refer to Figure 2 , the belt winding mechanism 110 includes a lower pressing plate tooling 111 and an upper pressing plate tooling 112. A first groove 113 is formed on the top surface of the lower pressing plate tooling 111, and a second groove 114 is formed on the bottom surface of the upper pressing plate tooling 112. The widths of the first groove 113 and the second groove 114 are both greater than the width of the strap 300. The first groove 113 and the second groove 114 cooperate to form a belt hole through which the strap 300 passes. In this embodiment, the number of the first grooves 113 and the second grooves 114 is three each, and the first grooves 113 and the second grooves 114 are arranged in one-to-one correspondence to form three belt holes through which three straps 300 can pass simultaneously. In this way, the belt holes can ensure that the straps 300 are fully limited and will not be overly squeezed by the lower pressing plate tooling 111 and the upper pressing plate tooling 112, avoiding the situation that the pneumatic tensioner 200 cannot pull the straps 300.

[0064] The bottom surface of the lower platen tooling 111 is provided with bosses 115. After the strap 300 is wound around the strap winding mechanism 110, the surface of the boss 115 will press one end of the strap 300. In this embodiment, the number of bosses 115 is three, and the bosses 115 are arranged in one-to-one correspondence with the first grooves 113. The width of the boss 115 is smaller than the width of the strap 300 to ensure that the boss 115 will not press on the end plate of the stack. In this way, during the assembly or tensioning process of the strap 300, the strap 300 is squeezed by the boss 115, which can ensure that when the stack is under the stacking pressure and the rack 180 applies a pulling force to the strap 300, the strap 300 will not become loose or be pulled out.

[0065] In other embodiments, between the upper platen tooling 112 and the press head 120 and between the lower platen tooling 111 and the stack, a positioning structure, such as a cylindrical rod, can be designed according to the stack positioning method to fully ensure the stacking dimension accuracy.

[0066] Please refer to Figure 3 , the winding path of the strap 300 on the fastening device 100 of the fuel cell stack: First, the strap 300 starts to wind from position A, passes through B, C, D in sequence, and returns to A; then, the strap 300 from position A to position B is abutted against the boss 115 of the lower platen tooling 111, and the strap 300 is continuously wound from position A so that the strap 300 is caught in the first groove 113 of the lower platen tooling 111 and passes through E, F in sequence; finally, the end of the strap 300 at position F is fastened to the fastening mechanism 140 to complete the winding of the strap 300; in addition, the upper platen tooling 112 also needs to be assembled onto the lower platen tooling 111, and then the press head 120 is pressed onto the upper platen tooling 112 and a certain pressure is applied so that the stack receives the required stacking pressure.

[0067] Please refer to Figure 4 , the slide rail 170 includes a support frame 171 and rollers 172. Through holes are provided on the support frame 171 for the rack 180 to pass through. The rollers 172 are rotatably arranged at the bottom of the through holes, and the rollers 172 are used to support the rack 180. Specifically, the roller 172 can be composed of a rotating shaft and a bearing sleeved on the rotating shaft, wherein the rotating shaft is installed on the support frame 171. The number of rollers 172 can be multiple, and the multiple rollers 172 are arranged at equal intervals to facilitate the stable movement of the rack 180.

[0068] In this way, the slide rail 170 can play a guiding role in the movement of the rack 180. During the use of the slide rail 170, lubricating oil can also be used to reduce the friction between the rack 180 and the slide rail 170, minimize the error of the tension force of the strap 300 to the greatest extent, and make the forces on each strap 300 consistent.

[0069] Please refer to Figure 5 ,Figure 5 The dashed line represents the gas path connection, and the solid line represents the communication connection. The fastening device 100 of the fuel cell stack further includes a controller 240 and a tension sensor 250. Among them, the tension sensor 250 is used to collect the tightening force of the strap 300. The controller 240, the pressure regulating valve 230, and the tension sensor 250 are all electrically connected. The controller 240 controls the compressed gas from the gas source to enter the cylinder 150, and according to the tension value of the strap 300 collected by the tension sensor 250, controls the outlet pressure of the pressure regulating valve 230, so as to control the driving force of the pneumatic tensioner 200, making the tightening force of each strap 300 uniform.

[0070] Specifically, in this embodiment, the controller 240 is preset with multiple tightening force control points. Among them, the tightening force control points at least include a first pre-tightening force, a second pre-tightening force, and a third pre-tightening force with gradually increasing tension values. When the controller 240 receives the start tightening signal, first, the controller 240 adjusts the outlet pressure of each pressure regulating valve 230, and at the same time drives each pneumatic tensioner 200 to slowly tighten all the straps 300. And during the tightening process, the real-time tension value of each strap 300 is obtained through the tension sensor 250, and the outlet pressure of each pressure regulating valve 230 is quickly adjusted according to the tension value to balance the tightening force of each strap 300, so that the tension received by each strap 300 during the tightening process is the same; then, when the tightening force of all the straps 300 reaches the first pre-tightening force, the controller 240 continues to adjust the outlet pressure of each pressure regulating valve 230, and at the same time obtains the tension value in each tension sensor 250, and continuously and quickly adjusts the outlet pressure of the pressure regulating valve 230 according to the tension value, so that the tightening force of each strap 300 synchronously reaches the second pre-tightening force and keeps the pressure for a certain period of time, which can be 5 minutes; finally, the controller 240 adjusts the outlet pressure of each pressure regulating valve 230, and at the same time obtains the tension value in each tension sensor 250, and continuously and quickly adjusts the outlet pressure of the pressure regulating valve 230 according to the tension value, so that the tightening force of each strap 300 synchronously reaches the third pre-tightening force and keeps the pressure for a certain period of time, which can be 5 minutes.

[0071] In this embodiment, the controller 240 can adopt industrial automatic control devices such as PLCs and industrial computers, and through program control, the forces on two or more straps during the tightening process can be made the same, ensuring that the tightening forces received by the fuel cell stack straps during tightening and assembly are the same.

[0072] The length of the rack 180 can be flexibly adjusted according to the height of the fuel cell stack and the length of the strap 300. Even if there is only one type of rack 180 with a fixed size, when the tension of the strap 300 reaches the first pre-tightening tension, the controller 240 can control the separation of the rack 180 from the gear 190, enabling the rack 180 to return to its initial state. Then, loosen the strap fastening mechanism 140, re-tighten the strap 300, and lock the fastening mechanism 140 again to continue the tensioning. In this way, one type of rack 180 can also fasten fuel cell stacks of multiple specifications and adapt to the applications of multiple fuel cell stacks.

[0073] In this embodiment, three straps 300 are wound around the strap winding mechanism 110, and the numbers of the strap fastening mechanism 140, the rack 180, the gear 190, and the pneumatic tensioner 200 are equal and all three. In this way, the fastening device 100 of the fuel cell stack provided in this embodiment can simultaneously tighten three straps 300 on the fuel cell stack, improving the efficiency of fastening the fuel cell stack.

[0074] In other embodiments, the numbers of the fastening mechanism 140, the rack 180, the gear 190, and the pneumatic tensioner 200 can also be one, two, or even more, and can be flexibly set according to processing requirements. The number of the straps 300 can be adjusted as needed.

[0075] The working process of the fastening device 100 of the fuel cell stack provided in this embodiment:

[0076] First, after the strap 300 is wound and fixed on the fastening device 100 of the fuel cell stack, the controller 240 controls the piston rod of the cylinder 150 to contract, driving the bracket 160, the slide rail 170, and the rack 180 to move upward until the rack 180 meshes with the gear 190.

[0077] Then, the controller 240 collects the tension value of the tension sensor 250, controls the pneumatic tensioner 200 to tighten the strap 300 by adjusting the outlet pressure of the pressure regulating valve 230 until the strap 300 reaches the tension requirement on the fuel cell stack, and manually or automatically welds the connection of the strap 300.

[0078] Finally, the controller 240 controls the piston rod of the cylinder 150 to extend, driving the bracket 160, the slide rail 170, and the rack 180 to move downward until the rack 180 is completely separated from the gear 190, enabling the rack 180 to slide freely, removing the end of the strap 300 from the strap fastening mechanism 140, restoring the height of the pressure head 120, and performing operations such as cutting the strap 300. The fastening of the fuel cell stack is completed.

[0079] This embodiment also provides a production line of a fuel cell stack. The production line includes the fastening device 100 of the fuel cell stack. The production line can also include an automatic welder, which is used to weld the strap 300 after the strap 300 fastens the fuel cell stack.

[0080] Beneficial effects of the fastening device 100 of the fuel cell stack and the production line provided in this embodiment:

[0081] 1. A pressure regulating valve 230 is provided on the pipeline of the pneumatic tensioner 200. The pressure regulating valve 230 can adjust the air supply pressure of the pneumatic tensioner 200 to achieve the purpose of adjusting the tension of the strap 300;

[0082] 2. The pneumatic tensioner 200 drives the gear 190 to rotate. The gear 190 drives the rack 180 to move. The rack 180 pulls the strap 300 to tighten on the winding mechanism 110, thereby fastening the fuel cell stack and being able to drive the strap 300 to tighten reliably and stably;

[0083] 3. The tension sensor 250 detects the tension of the strap 300, and the controller 240 controls the pressure regulating valve 230 of each pneumatic tensioner according to the detected tension, so as to quickly adjust the compressed gas pressure and drive the rack 180 to make the tension of each strap 300 uniform;

[0084] 4. The driving force of the pneumatic tensioner 200 can be adjusted synchronously, so that the tightening degree of the strap 300 can be flexibly controlled, and the maximum driving force of the pneumatic tensioner 200 is relatively large, which is suitable for straps of different strengths and different materials;

[0085] 5. The length of the strap 300 wound on the belt winding mechanism 110 can be flexibly adjusted, which is convenient for the strap 300 to wind fuel cell stacks of various sizes, so as to be suitable for fastening various fuel cell stacks and having good applicability.

[0086] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A fastening device for a fuel cell stack, characterized in that, The fastening device of the fuel cell stack includes: A winding mechanism (110) for winding a strap (300) and having a limiting effect on the strap (300). The winding mechanism (110) includes a lower pressing plate tooling (111) and an upper pressing plate tooling (112). A pressing head (120) is arranged on the top surface of the upper pressing plate tooling (112), and the pressing head (120) is used to apply pressure to the upper pressing plate tooling (112); A fastening mechanism (140) for fastening the end of the strap (300). The fastening mechanism (140) includes a base (141) and a movable block (142). The movable block (142) is connected to the base (141) by bolts, and the area formed between the movable block (142) and the base (141) is used to fasten the end of the strap (300); A tensile force sensor (250), one end of the tensile force sensor (250) is connected to the fastening mechanism (140), and the tensile force sensor (250) can monitor the tensile force of the wound strap (300); A rack (180) connected to the fastening mechanism (140); A gear (190) for meshing with the rack (180); A pneumatic tensioner (200) connected to the gear (190). The pneumatic tensioner (200) is used to drive the gear (190) to rotate according to the tensile force detected by the tensile force sensor (250), so as to drive the strap (300) to tighten on the winding mechanism (110).

2. The fastening device of the fuel cell stack according to claim 1, characterized in that, The fastening device of the fuel cell stack further includes: A first pipeline (210), one end of the first pipeline (210) is connected to the pneumatic tensioner (200); A pressure regulating valve (230) connected to the other end of the first pipeline (210). The pressure regulating valve (230) is used to adjust the tensile force value of the pneumatic tensioner (200), and the outlet pressure of the pressure regulating valve (230) is adjusted according to the tensile force detected by the tensile force sensor (250).

3. The fastening device for a fuel cell stack according to claim 1, characterized in that, The fastening device of the fuel cell stack further includes: A bracket (160) connected to the rack (180); A cylinder (150), the piston rod of the cylinder (150) is connected to the bracket (160), and the cylinder (150) is used to drive the bracket (160) so that the rack (180) meshes with or disengages from the gear (190).

4. The fastening device of the fuel cell stack according to claim 3, characterized in that, The fastening device of the fuel cell stack further includes: A slide rail (170), the rack (180) is slidably matched with the slide rail (170), and the bracket (160) is connected to the rack (180) through the slide rail (170).

5. The fastening device for a fuel cell stack according to claim 4, characterized in that, The slide rail (170) includes: A support frame (171) with a through hole opened on the support frame (171), and the through hole is used for the rack (180) to pass through; A roller (172) arranged at the bottom of the through hole, and the roller (172) is used to support the rack (180).

6. The fastening device of the fuel cell stack according to claim 1, characterized in that, The top surface of the lower platen tooling (111) is provided with a first groove (113), and the bottom surface of the lower platen tooling (111) is provided with a boss (115), and the boss (115) is used to press one end of the strap (300). The bottom surface of the upper platen tooling (112) is provided with a second groove (114), and the first groove (113) and the second groove (114) cooperate to form a hole, and the hole is used for the strap (300) to pass through.

7. The fastening device for a fuel cell stack according to claim 1, characterized in that, The number of the fastening mechanism (140), the rack (180), the gear (190) and the pneumatic tensioner (200) is equal and each is multiple, and the winding mechanism (110) can wind multiple straps (300) at one time.

8. A production line for a fuel cell stack, characterized in that, Comprising the fastening device for a fuel cell stack according to any one of claims 1-7.

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