Fuel cell stack press fitting tool

Abstract

The application provides a fuel cell stack pressing tool, and belongs to the technical field of fuel cells, and solves the problems that the prior art cannot meet the pressing requirements of multiple stacks at the same time, and the positioning is not accurate and the failure rate is high. The tool comprises a pressing machine, a pressing plate, a pressing rod, a pressing rod centering device, a gantry beam, a locking device positioning device, a first positioning pin, a gantry column, a gantry support, a positioning connecting plate, a connecting bottom plate, a bipolar plate positioning tool, a second positioning pin, a third positioning pin, a PACK preloading support and a slide rail. The two ends of the gantry beam are assembled and fixed on the pressing machine through the sequentially connected gantry column, gantry support, positioning connecting plate, connecting bottom plate and slide rail. The bipolar plate positioning tool is preloaded on the positioning connecting plate, and the stack core is positioned through the combined positioning of the outer and inner positioning. The PACK preloading support is fixed on the bottom plate. The pressing of single stack and multiple stacks can be freely switched, and the pressing and packaging are completed at one time.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a fuel cell stack press-fitting fixture. Background Technology

[0002] Hydrogen energy, as an inexhaustible and clean energy source, is seeing increasingly promising applications and industrialization prospects. Particularly in the automotive industry, hydrogen fuel cell engines can replace internal combustion engines as power units. As the output power requirements of fuel cell engines increase, it becomes necessary to develop and design engines that are matched to the specific power requirements of the vehicle's layout.

[0003] As a core component of hydrogen fuel cell engines, the fuel cell stack's dimensions significantly limit the widespread use of fuel cell engines, necessitating the development of stacks of different sizes to meet these limitations. Currently, the market primarily utilizes single-stack and dual-stack structures.

[0004] Current fuel cell stack press-fit processes mostly involve stacking the cores as a single component, encapsulating them with steel strips or tie rods, and then assembling them with components such as the PACK casing. Existing fuel cell stack press-fit tooling has the following main problems: it can only meet the press-fit requirements of a single stack, not multiple stacks simultaneously; inaccurate positioning leads to press-fit defects, resulting in repeated press-fitting, which is time-consuming and labor-intensive; and the large variety of encapsulated components increases the risk and failure rate. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a fuel cell stack press-fitting fixture to solve the problems of existing technologies being unable to meet the requirements of simultaneous press-fitting of multiple stacks, and having inaccurate positioning and high failure rate.

[0006] On one hand, embodiments of the present invention provide a fuel cell stack press-fit fixture, including a press, a press plate, a press rod, a press rod centering device, a gantry beam, a locking device positioning device, a first positioning pin, a gantry column, a gantry bracket, a positioning connecting plate, a connecting base plate, a bipolar plate positioning fixture, a second positioning pin, a third positioning pin, a PACK pre-assembly bracket, a slide rail, and a base plate;

[0007] Both ends of the gantry beam are assembled and fixed to the press via gantry columns, gantry brackets, positioning connecting plates, connecting base plates, and slide rails connected in sequence. The base plates are installed on the slide rails in pairs for positioning the front plate of the PACK. The pressure plate, pressure rod, and pressure rod centering device are connected in sequence and pre-installed on the press head of the press. The bipolar plate positioning fixture is pre-installed on the positioning connecting plate for positioning the stacked cores using a combination of external and internal positioning. The PACK pre-installation bracket is fixed on the base plate for pre-installing the PACK shell onto the front plate of the PACK. The second and third positioning pins are located between the bipolar plate positioning fixture and the PACK pre-installation bracket for installing the current collector, bipolar plate, and membrane electrode assembly of the stacked single cells onto the front plate of the PACK. The locking device, positioning device, and first positioning pin are connected in sequence and installed on the rear plate of the PACK.

[0008] The beneficial effects of the above technical solution are as follows: It provides a multifunctional fuel cell stack press-fit fixture. This fixture can meet the press-fit requirements of both single and multi-stack fuel cell stacks, allowing for free switching between single and multi-stack press-fitting. It solves the problem of inaccurate positioning by combining internal and external positioning. Press-fitting and sealing are completed in one step without switching press-fitting devices, improving the pass rate of press-fitting, reducing the use of steel strips and tie rods, simplifying the fuel cell stack structure, and significantly reducing risks.

[0009] Based on a further improvement of the above method, the bipolar plate positioning fixture further includes a first positioning strip, a second positioning strip, a third positioning strip, and a positioning block connected in sequence; wherein,

[0010] The first positioning bar is used to position the bipolar plates and membrane electrodes that exceed the height of the internal space of the PACK housing during the packaging process.

[0011] The second positioning bar is used to position the bipolar plate and membrane electrode within the space height of the PACK housing to the space height after the packaging force is applied during the packaging process.

[0012] The third positioning bar is used to position the bipolar plates and membrane electrodes inside the PACK after packaging.

[0013] The positioning block is used to position the third positioning strip and the PACK front-end board.

[0014] Furthermore, when applied to a dual-stack single-plate structure, the fuel cell stack press-fitting fixture encapsulates the fuel cell stack in a bottom-to-top sequence.

[0015] Furthermore, all components of this tooling are detachable; and,

[0016] The positioning connecting plate is divided into a first positioning connecting plate and a second positioning connecting plate arranged symmetrically in structure.

[0017] The connection between the base plate and the slide rail is equipped with positioning strips or bolts to position the base plate.

[0018] The connection between the base plate and the PACK front-end board is equipped with a cylindrical pin for positioning the PACK front-end board.

[0019] Furthermore, the fuel cell stack press-fit tooling also includes a locking device replacement device; wherein,

[0020] The locking device replacement device is used after the core is pre-compressed. The locking device replacement device is placed between the pre-compressed PACK and the floating end plate, and then the locking device replacement device is pre-installed.

[0021] Furthermore, the fuel cell stack press-fit fixture also includes a controller; the controller executes the following program to complete the single electrode fabrication function of the fuel cell stack:

[0022] S1. Control the assembly of the gantry beam, gantry column, gantry bracket, positioning connecting plate, connecting base plate slide rail, and fix them on the press;

[0023] S2. The control base plate is installed on the slide rail and positioned using positioning strips or bolts;

[0024] S3. The control plate, pressure bar, and pressure bar alignment device are connected in sequence and pre-installed on the pressure head of the press.

[0025] S4. Control the PACK front-end board and the base plate to be positioned by cylindrical pins;

[0026] S5. Control the first positioning bar, the second positioning bar, the third positioning bar, and the positioning block to be connected in sequence and pre-installed on the positioning connection plate;

[0027] S6. The control PACK housing is mounted on the PACK pre-mounted bracket and pre-mounted on the PACK front end board;

[0028] S7. Control the second and third positioning pins to be installed on the PACK front end board, and then stack the current collector, bipolar plate and membrane electrode in sequence;

[0029] S8. After the stacking is completed, the locking device, the positioning device, and the first positioning pin are connected in sequence and installed on the PACK rear end plate. The press is then pressed down to perform pre-compression.

[0030] S9. During the pre-compression process, the first positioning strip and the second positioning strip are removed successively according to the downward movement of the core to complete the preparation of the single electrode of the fuel cell stack.

[0031] Furthermore, the controller also executes the following program to complete the single-stack PACK packaging function:

[0032] S10. After the first positioning bar, second positioning bar, third positioning bar, and positioning block are connected in sequence, they are pre-installed on the positioning connection plate again, and the PACK front-end board of another core is superimposed on the prepared core.

[0033] S11. Control the second and third positioning pins to be installed on the PACK front end board, and stack the current collector, bipolar plate, and membrane electrode in sequence, stack the core and repeat steps S10 to S11.

[0034] S12. After stacking the core, place a large shim on the floating end plate, and install the locking device, positioning device, and first positioning pin on the PACK rear end plate in sequence.

[0035] S13. Control the locking device, positioning device, and gantry beam placement jacks to preload the core;

[0036] S14. After pre-compressing the core, encapsulate the current PACK and the PACK front-end board;

[0037] S15. Control the press pressure release, remove the locking device and positioning device used for the first core assembly, and the first positioning pin to obtain a single fuel cell stack.

[0038] Furthermore, the controller also executes the following procedure to complete the pressing of the two stacks:

[0039] S16. After the base plate moves, fix it in place and install the second fuel cell stack;

[0040] S17. Install the locking device positioning device and the first positioning pin on the PACK rear end plate of the second fuel cell stack, and the press moves down to perform pre-pressing of the second fuel cell stack;

[0041] S18. Place the locking device replacement device between the PACK and the floating end plate, and pre-install the locking device positioning device;

[0042] S19. After pre-assembly, control the press to press and secure the two fuel cells;

[0043] S20. Perform an airtightness test. If the test is successful, prompt to remove some of the tooling and remove the packaged dual-pack from the press.

[0044] Furthermore, in step S16, the base plate (21) is moved by a stepping device to perform PACK packaging.

[0045] Furthermore, the pressure bar centering device adopts a conical centering method.

[0046] The summary section is provided to present the chosen concepts in a simplified form, which will be further described in the detailed description below. The summary section is not intended to identify essential or essential features of the invention, nor is it intended to limit the scope of the invention. Attached Figure Description

[0047] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same parts.

[0048] Figure 1 A schematic diagram of the fuel cell stack press-fit tooling composition for Example 1 is shown;

[0049] Figure 2 A three-dimensional schematic diagram of the fuel cell stack press-fit tooling of Example 2 is shown;

[0050] Figure 3 A schematic diagram of the fuel cell stack press-fit fixture for Example 2 is shown;

[0051] Figure 4 A schematic diagram of the pressing process in Example 2 is shown.

[0052] Figure Labels

[0053] 1-Pressure plate; 2-Pressure rod; 3-Pressure rod centering device; 4-Gantry frame crossbeam; 5-Locking device positioning device; 6-First positioning pin; 7-Locking device replacement device; 8-Gantry frame column; 9-Gantry frame bracket; 10-First positioning connecting plate; 11-Connecting base plate; 12-First positioning strip; 13-Second positioning strip; 14-Third positioning strip; 15-Second positioning pin; 16-Third positioning pin; 17-PACK pre-installed bracket; 18-Positioning block; 19-Second positioning connecting plate;

[0054] 20-Slide rail; 21-Base plate; 22-Limit block. Detailed Implementation

[0055] Embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0056] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., refer to different objects. Other explicit and implicit definitions may also be included below.

[0057] The abbreviations involved in this invention and their definitions are introduced below.

[0058] Fuel cell engine: An energy conversion device that directly converts the chemical energy in fuel and air into electrical energy through the membrane electrode assembly and bipolar plates, the core components inside the fuel cell stack. The reaction products, including water and waste heat, are discharged outside the reaction device. The generated electrical energy is supplied to the vehicle drive via a step-up / step-down DC-DC converter, providing sufficient kinetic energy for the vehicle.

[0059] Fuel cell stack: includes PACK housing, end plates, current collectors, membrane electrodes, bipolar plates, insulating plates, spring assemblies, and clamping devices.

[0060] Example 1

[0061] One embodiment of the present invention discloses a fuel cell stack press-fitting fixture, such as... Figure 1 As shown, it includes a press, a pressure plate 1, a pressure rod 2, a pressure rod centering device 3, a gantry beam 4, a locking device positioning device 5, a first positioning pin 6, a gantry column 8, a gantry bracket 9, a positioning connecting plate, a connecting base plate 11, a bipolar plate positioning fixture, a second positioning pin 15, a third positioning pin 16, a PACK pre-installed bracket 17, a slide rail 20, and a base plate 21.

[0062] The two ends of the gantry beam 4 are respectively assembled and fixed on the press by the gantry column 8, gantry bracket 9, positioning connecting plate, connecting base plate 11 and slide rail 20 connected in sequence.

[0063] The base plate 21 is mounted on the slide rail 20 in pairs and is used to position the front end board of the PACK.

[0064] The pressure plate 1, pressure rod 2, and pressure rod centering device 3 are connected in sequence and pre-installed on the pressure head of the press.

[0065] The bipolar plate positioning fixture is pre-installed on the positioning connection plate and is used to position the inserted core stack by combining external and internal positioning.

[0066] The PACK pre-mount bracket 17 is fixed on the base plate 21 and is used to install the PACK housing onto the front panel of the PACK.

[0067] The second positioning pin 15 and the third positioning pin 16 are located between the third positioning strip 14 and the PACK pre-mounted bracket 17, and are used to mount the current collector, bipolar plate and membrane electrode of the stacked single cell on the front end board of the PACK.

[0068] The locking device positioning device 5 and the first positioning pin 6 are connected in sequence and then installed on the PACK rear end plate.

[0069] Compared with existing technologies, this embodiment provides a multifunctional fuel cell stack press-fit fixture. This fixture can meet the press-fit requirements of both single and multi-stack fuel cell stacks, allowing for seamless switching between single and multi-stack press-fitting. It solves the problem of inaccurate positioning by combining internal and external positioning, completing press-fitting and sealing in one step without switching press-fitting devices. This improves the pass rate of press-fitting, reduces the use of steel strips and tie rods, simplifies the fuel cell stack structure, and significantly reduces risks.

[0070] Example 2

[0071] Based on Embodiment 1, the bipolar plate positioning fixture is further improved by including a first positioning strip 12, a second positioning strip 13, a third positioning strip 14, and a positioning block 18 connected in sequence, as follows: Figures 2-3 As shown.

[0072] The first positioning bar 12 is used to position the bipolar plate and membrane electrode that exceed the height of the internal space of the PACK housing during the packaging process.

[0073] The second positioning bar 13 is used to position the bipolar plate and membrane electrode within the space height of the PACK housing to the space height after the packaging force is applied during the packaging process.

[0074] The third positioning strip 14 is used to position the bipolar plates and membrane electrodes in the PACK after packaging (positioning the bipolar plates and membrane electrodes within the theoretical spatial height of the PACK after the theoretical state packaging force is applied).

[0075] The positioning block is used to position the third positioning strip 14 against the PACK front-end board.

[0076] The first positioning bar 12, the second positioning bar 13, and the third positioning bar 14 perform three-level positioning on the fuel cell stack to be assembled, making the positioning more accurate.

[0077] Preferably, when applied to a dual-stack single-plate structure, the fuel cell stack press-fitting fixture is used for encapsulation in a bottom-to-top sequence.

[0078] Preferably, all components of the tooling are detachable. Furthermore, the positioning connecting plate is divided into a first positioning connecting plate 10 and a second positioning connecting plate 19 arranged symmetrically. Positioning strips or bolts are provided at the connection between the base plate 21 and the slide rail 20 to position the base plate 21. Cylindrical pins are provided at the connection between the base plate 21 and the PACK front end plate to position the PACK front end plate.

[0079] Preferably, the fuel cell stack press-fit fixture further includes a locking device replacement device 7. The locking device replacement device 7 is used to pre-install the fuel cell stack after the core is pre-pressed, by placing the locking device replacement device 7 between the pre-pressed PACK and the floating end plate.

[0080] Preferably, the fuel cell stack press-fit fixture also includes a controller.

[0081] Preferably, the controller executes the following program to complete the single-electrode fabrication function of the fuel cell stack:

[0082] S1. Assemble the control gantry beam 4, gantry column 8, gantry bracket 9, positioning connecting plate, connecting base plate 11, and slide rail 20, and fix them on the press;

[0083] S2. The control base plate 21 is installed on the slide rail 20 and positioned using positioning strips or bolts;

[0084] S3. After the control plate 1, pressure rod 2, and pressure rod centering device 3 are connected in sequence, they are pre-installed on the pressure head of the press.

[0085] S4. Control the PACK front end board and the base plate 21 to be positioned by cylindrical pins; complete the preliminary tooling assembly through steps S1 to S4;

[0086] S5. After the first positioning bar 12, the second positioning bar 13, the third positioning bar 14, and the positioning block 18 are connected in sequence, they are pre-installed on the positioning connecting plate (first positioning connecting plate 10, second positioning connecting plate 19), that is, the bipolar plate positioning fixture is installed through this step.

[0087] S6. Control the PACK housing (PACK housing) to be installed on the PACK pre-mount bracket 17, pre-mounted on the PACK front end plate, that is, the PACK housing is pre-positioned on the tooling;

[0088] S7. Control the second positioning pin 15 and the third positioning pin 16 to be installed on the PACK front end board, and then stack the current collector, bipolar plate and membrane electrode in sequence to complete the front end board positioning function.

[0089] S8. After the stacking is completed, the locking device positioning device 5 and the first positioning pin 6 are connected in sequence and installed on the PACK rear end plate, and the press is pressed down to perform pre-compression;

[0090] S9. During the pre-compression process, the first positioning strip 12 and the second positioning strip 13 are removed successively according to the downward movement of the core to complete the preparation of the single electrode of the fuel cell stack.

[0091] Preferably, the controller also executes the following program to complete the single-stack PACK packaging function:

[0092] S10. Control the first positioning bar 12, the second positioning bar 13, the third positioning bar 14, and the positioning block 18 to be connected in sequence and then pre-installed on the positioning connecting plate (first positioning connecting plate 10, second positioning connecting plate 19) to superimpose the PACK front end plate of another core on the prepared core.

[0093] S11. Control the second positioning pin 15 and the third positioning pin 16 to be installed on the front end board of the PACK, and stack the current collector, bipolar plate and membrane electrode in sequence, stack the core and repeat steps S10 to S11 until the number of single cells reaches the standard, that is, the lower core stacking function is completed.

[0094] S12. After stacking the core, place a large shim on the floating end plate, and control the locking device positioning device 5 and the first positioning pin 6 to be installed on the PACK rear end plate in sequence.

[0095] S13. Control locking device, positioning device 5, and gantry beam 4 to place jacks and other devices to pre-compress the core;

[0096] S14. After pre-compressing the core, encapsulate the current PACK and the PACK front-end board;

[0097] S15. Control the press pressure release, remove the locking device positioning device 5 and the first positioning pin 6 used for the first core assembly, and obtain a single fuel cell stack.

[0098] Preferably, after step S15, the core sealing force, i.e., the airtightness test, can be added.

[0099] Preferably, the controller also executes the following procedure to complete the pressing of the two stacks:

[0100] S16. After the control base plate 21 is moved and fixed, install the second stack, including CVP (cell voltage acquisition device) installation and lower copper busbar installation, bipolar plate positioning fixture installation, upper core stacking, and PACK packaging.

[0101] S17. Install the locking device positioning device 5 and the first positioning pin 6 on the PACK rear end plate of the second fuel cell stack, and the press moves down to perform pre-pressing of the second fuel cell stack;

[0102] S18. Place the locking device replacement device 7 between the PACK and the floating end plate, and pre-install the locking device positioning device 5;

[0103] S19. After pre-assembly, control the press to press and secure the two fuel cells;

[0104] S20. Perform an airtightness test. If the test is successful, prompt to remove some of the tooling and remove the packaged dual-pack from the press.

[0105] Preferably, in step S16, a stepping device is used to assist the movement of the base plate 21 for PACK packaging. That is, a stepping device is used to assist in PACK packaging before stacking.

[0106] Preferably, the pressure bar centering device adopts a conical centering method.

[0107] During implementation, the controller's execution flow can be found in [reference needed]. Figure 4 , but not limited to Figure 4 The content.

[0108] Preferably, the slide rail 20 is further provided with a limiting block 22, which is used to limit the sliding range.

[0109] Compared with the prior art, the fuel cell stack press-fitting fixture provided in this embodiment has the following characteristics:

[0110] Beneficial effects:

[0111] 1. Based on the bipolar plate structure, the core stacking adopts a combination of external and internal positioning, which makes the positioning more accurate, improves the pressing qualification rate, eliminates repeated pressing, and saves time and material costs.

[0112] 2. Based on the structure of the press equipment, a sliding block + limit block is adopted (see...). Figure 2 The method of pre-loading dual cores with a single pressure head reduces the types of components and is more conducive to a significant increase in mass power density and volume power density.

[0113] 3. Based on the dual-stack single-end board structure, the packaging is carried out in the order of bottom to top.

[0114] 4. The core is press-fitted using a tapered centering and positioning guide method. This results in more accurate positioning and significantly improves the success rate of the fuel cell stack press-fitting and sealing.

[0115] 5. A stepper device is used to assist in PACK packaging before stacking.

[0116] 6. The PACK front-end board and assembly tooling are positioned using a pin positioning method.

[0117] 7. The three-segment positioning strip design makes positioning more accurate.

[0118] 8. Single-stacking and dual-stacking loading can be freely switched.

[0119] 9. It can reduce the storage space of tooling. By freely switching between single and double stacks, it can reduce the maintenance and upkeep of tooling and save tooling usage costs. At the same time, the structure eliminates the structural forms of tie rods and steel strips, reducing the tooling fixtures used for steel strip packaging and tie rod packaging. Steel strips and tie rods can be eliminated, reducing the product's usage cost.

[0120] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to the prior art of the embodiments, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A fuel cell stack pressing tool characterized by comprising: The fuel cell stack pressing and assembling tool comprises a press, a pressing plate (1), a pressing rod (2), a pressing rod centering device (3), a portal beam (4), a locking device positioning device (5), a first positioning pin (6), a portal column (8), a portal support (9), a positioning connecting plate, a connecting bottom plate (11), a bipolar plate positioning tool, a second positioning pin (15), a third positioning pin (16), a PACK pre-assembly support (17), a sliding rail (20), a bottom plate (21); The two ends of the portal beam (4) are assembled and fixed on the press through the sequentially connected portal column (8), portal support (9), positioning connecting plate, connecting bottom plate (11) and sliding rail (20); the bottom plate (21) is installed on the sliding rail (20) and is arranged in pairs for positioning the PACK front end plate; the pressing plate (1), pressing rod (2) and pressing rod centering device (3) are sequentially connected and pre-assembled on the pressing head of the press; the bipolar plate positioning tool is pre-assembled on the positioning connecting plate and is used for positioning the stack by combining external and internal positioning; the PACK pre-assembly support (17) is fixed on the bottom plate (21) and is used for pre-assembling the PACK shell on the PACK front end plate; the second positioning pin (15) and third positioning pin (16) are arranged between the bipolar plate positioning tool and PACK pre-assembly support (17) and are used for assembling the current collector plate, bipolar plate and membrane electrode of the stack single cell on the PACK front end plate; the locking device positioning device (5) and first positioning pin (6) are sequentially connected and installed on the PACK rear end plate; The bipolar plate positioning tool further comprises a first positioning strip (12), a second positioning strip (13), a third positioning strip (14) and a positioning block (18) which are sequentially connected; wherein, The first positioning strip (12) is used for positioning the bipolar plate and membrane electrode which exceeds the height of the internal space of the PACK shell during encapsulation; The second positioning strip (13) is used for positioning the bipolar plate and membrane electrode which is within the space height of the PACK shell after the encapsulation force is applied during encapsulation; The third positioning strip (14) is used for positioning the bipolar plate and membrane electrode in the PACK after encapsulation; The positioning block is used for positioning the third positioning strip (14) and PACK front end plate; The components of the tool are all detachable components; and The positioning connecting plate is divided into a first positioning connecting plate (10) and a second positioning connecting plate (19) which are symmetrically arranged; The connecting position of the bottom plate (21) and sliding rail (20) is provided with a positioning strip or bolt for positioning the bottom plate (21); The connecting position of the bottom plate (21) and PACK front end plate is provided with a cylindrical pin for positioning the PACK front end plate; The fuel cell stack pressing and assembling tool further comprises a controller; the controller executes the following program to complete the single electrode preparation function of the stack: S1. Assemble and fix the portal beam (4), portal column (8), portal support (9), positioning connecting plate, connecting bottom plate (11) and sliding rail (20) on the press; S2. Install the bottom plate (21) on the sliding rail (20) and position it by using a positioning strip or bolt; S3. Control the pre-assembly of the pressing plate (1), the pressing rod (2), and the pressing rod centering device (3) on the pressing head of the press in sequence; S4. Control the positioning of the PACK front end plate and the bottom plate (21) by the cylindrical pin; S5. Control the pre-assembly of the first positioning strip (12), the second positioning strip (13), the third positioning strip (14), and the positioning block (18) on the positioning connecting plate in sequence; S6. Control the mounting of the PACK shell on the PACK pre-assembly support (17) and the pre-assembly on the PACK front end plate; S7. Control the mounting of the second positioning pin (15) and the third positioning pin (16) on the PACK front end plate, and the stacking of the current collector plate, the bipolar plate, and the membrane electrode in sequence; S8. After the stacking is completed, control the mounting of the locking device positioning device (5) and the first positioning pin (6) on the PACK rear end plate in sequence, and pre-press the press; S9. During the pre-pressing process, remove the first positioning strip (12) and the second positioning strip (13) according to the downward movement of the stack core, and complete the preparation of the single electrode of the electric pile.

2. The fuel cell stack press fitting tool according to claim 1, characterized by When applied to a double-stack single-plate structure, the fuel cell stack pressing tool is packaged in the order of first down and then up.

3. The fuel cell stack press fitting tool according to claim 1, characterized by, It also includes a locking device replacement device (7); wherein, After pre-pressing the stack core, the locking device replacement device (7) is placed between the pre-pressed PACK and the floating end plate, and the locking device replacement device (7) is pre-assembled.

4. The fuel cell stack press assembly tool of claim 1, wherein, The controller also executes the following program to complete the PACK packaging function of a single stack: S10. Control the pre-assembly of the first positioning strip (12), the second positioning strip (13), the third positioning strip (14), and the positioning block (18) on the positioning connecting plate in sequence, and stack another PACK front end plate on the prepared stack core; S11. Control the mounting of the second positioning pin (15) and the third positioning pin (16) on the PACK front end plate, and the stacking of the current collector plate, the bipolar plate, and the membrane electrode in sequence, and repeat steps S10-S11 to stack the core; S12. After stacking the core, place a large gasket on the floating end plate, and control the mounting of the locking device positioning device (5) and the first positioning pin (6) on the PACK rear end plate in sequence; S13. Control the placement of the locking device positioning device (5) and the gantry beam (4) on the jack to pre-press the core; S14. After pre-pressing the core, package the current PACK and the PACK front end plate; S15. Control the release of the press pressure, remove the locking device positioning device (5) and the first positioning pin (6) used in the assembly of the first stack core, and obtain a single electric pile.

5. The fuel cell stack press assembly tool of claim 4, wherein, The controller also executes the following program to complete the pressing of a double stack: S16. Control the movement and fixation of the bottom plate (21), install the second electric pile as the upper pile; S17. Mount the locking device positioning device (5) and the first positioning pin (6) on the PACK rear end plate of the second electric pile, and pre-press the second electric pile by lowering the press; S18. Place the locking device replacement device (7) between the PACK and the floating end plate, and pre-assembly the locking device positioning device (5). S19. After pre-assembly, control the press to press the two stacks and fix them; S20. Perform air tightness test, and after passing the test, remove part of the tooling, and move the packaged double-stack PACK out of the press.

6. The fuel cell stack press assembly tool of claim 5, wherein, In step S16, the bottom plate (21) is moved by the stepping device to perform PACK packaging.

7. The fuel cell stack press fitting tool according to claim 1 or 2, characterized by The press rod centering device adopts a conical centering method.

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