Fuel cell stack pressing jig
By designing a fuel cell stack press stack fixture with multiple fine-tuning methods, the problems of poor stack stiffness, cumbersome debugging and low positioning accuracy caused by traditional design are solved, and higher assembly accuracy and whole stack stiffness are achieved.
Patent Information
- Application Number
- CN202421866180.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The design of traditional fuel cell stack press stack fixtures is unreasonable, resulting in poor rigidity of the front and rear end plates of the stack, cumbersome debugging of the press stack fixtures, low positioning accuracy, and poor reliability of the entire stack.
A fuel cell stack press fixture including a block assembly, a press assembly, a reinforcement, a first positioning assembly, a second positioning assembly, an airtight test assembly and a pad plate is designed, and multiple fine-tuning methods are used to improve assembly accuracy and rigidity of the entire stack.
Through this design, the processing accuracy of parts can be greatly reduced, the assembly accuracy and stiffness of the whole pile can be improved, and the impact of error accumulation on the consistency of the whole pile can be effectively reduced, solving the reliability and cumbersome debugging of traditional fixtures.
Smart Images
Figure CN222939948U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fuel cells, and particularly relates to a fuel cell stack pressing fixture. Background Art
[0002] Traditional proton exchange membrane fuel cell stack pressing fixtures generally have the following deficiencies:
[0003] 1) The installation and debugging of traditional pressing fixtures are cumbersome. Especially for large stacks with a stack core height greater than 500 mm, high precision requirements are imposed on the accuracy of each component of the platform (especially the flatness and perpendicularity of geometric tolerances), and at the same time, the requirements for the machining accuracy of components are also increased.
[0004] 2) For stacks encapsulated with screws, the positioning surface of the pressing fixture is in direct contact with the stack core. The rear end plate and the rear bearing plate are larger than the stack core size, resulting in the need to slot the rear end plate and the rear bearing plate to match the positioning surface of the pressing fixture; the rear end plate and the rear bearing plate are pressure-bearing components in the whole stack and have high requirements for stiffness. Slotting the rear end plate and the rear bearing plate will affect the reliability of the whole stack.
[0005] 3) Traditional pressing fixtures do not have a fine-tuning system for the positioning surface of the fixture. There are errors in part processing, and the cumulative errors have a great impact on the accuracy of the positioning surface, thereby affecting the consistency of the whole stack assembly. Summary of the Utility Model
[0006] The embodiment of the utility model provides a fuel cell stack pressing fixture, aiming to solve the problems such as poor stiffness of the front and rear end plates of the stack, cumbersome debugging of the pressing fixture, low positioning accuracy, and poor reliability of the whole stack caused by the unreasonable design of the existing pressing fixture.
[0007] To solve the above problems, the embodiment of the utility model provides a fuel cell stack pressing fixture applicable to the stack, which includes a pressing block assembly, a press machine assembly, a reinforcement member, a first positioning assembly, a second positioning assembly, an airtightness test assembly, and a backing plate;
[0008] The press machine assembly includes a bottom plate, a first limiting member arranged at one end of the bottom plate, and a second limiting member arranged at the other end of the bottom plate; the backing plate is arranged on the bottom plate; the airtightness test assembly is arranged on the side of the backing plate away from the bottom plate; the stack is arranged on the side of the airtightness test assembly away from the backing plate; the pressing block assembly is arranged on the top of the stack;
[0009] Both the first positioning assembly and the second positioning assembly are arranged on the backing plate, and one end of the first positioning assembly away from the backing plate and one end of the second positioning assembly away from the backing plate are respectively abutted against the stack; the reinforcement member is respectively connected with the first positioning assembly and the second positioning assembly.
[0010] As a preferred embodiment, a plurality of first supporting bosses are arranged on one side surface of the backing plate, and a plurality of second supporting bosses are arranged on the other side surface; the first supporting bosses and the second supporting bosses are arranged in one-to-one correspondence; the first positioning assembly and the second positioning assembly are respectively arranged on the second supporting bosses.
[0011] As a preferred embodiment, at least two limiting right angles are arranged on each of the second supporting bosses, and the limiting right angles are arranged near the outer side of the second supporting bosses.
[0012] As a preferred embodiment, the first positioning assembly is arranged in one-to-one correspondence with the second supporting bosses, and the second positioning assembly is arranged in one-to-one correspondence with the second supporting bosses; the sum of the numbers of the first positioning assembly and the second positioning assembly is equal to the number of the second supporting bosses; the airtight test assembly is arranged inside the second supporting bosses.
[0013] As a preferred embodiment, the pressing block assembly includes a limiting block and a pressing block arranged on the limiting block. The limiting block is arranged on the top of the fuel cell stack, and the limiting block is respectively connected with the first positioning assembly and the second positioning assembly; when the fuel cell stack pressing jig is in a working state, the limiting block is embedded in the pressing block, and the pressing block is connected with the limiting block through screws.
[0014] Preferably, a plurality of limiting strips are arranged on the side surface of the limiting block, and the first positioning assembly and the second positioning assembly are respectively connected with the limiting strips; the limiting strips are arranged in one-to-one correspondence with the first positioning assembly and the second positioning assembly respectively.
[0015] As a preferred embodiment, the first limiting member and the second limiting member are symmetrically arranged.
[0016] As a preferred embodiment, the reinforcing member is respectively connected with one end of the first positioning assembly away from the backing plate and one end of the second positioning assembly away from the backing plate.
[0017] As a preferred embodiment, the airtight test assembly is fixed on the backing plate through a positioning pin.
[0018] As a preferred embodiment, the first positioning assembly includes a first adjusting strip, a first positioning plate and a first positioning block; the first positioning block is arranged on the second supporting boss; the first positioning plate is arranged on the first positioning block; the first adjusting strip is arranged on the first positioning plate through a first fastening screw.
[0019] Preferably, a first positioning groove is provided on the first adjusting strip, and at least two first positioning bosses adapted to the first positioning groove are provided on the first positioning plate. The first positioning groove is sleeved on the first positioning bosses; the first adjusting strip is connected to the reinforcing member.
[0020] Preferably, a first supporting boss is further provided on the first adjusting strip, and the first supporting boss abuts against the rear end plate of the stack; the top of the first adjusting strip is connected to the limiting strip by screws, and a gap is provided between the first adjusting strip and the limiting strip.
[0021] Preferably, a first limiting boss is further provided on the first positioning plate. The first limiting boss is arranged in parallel with the first positioning boss, and one side of the first adjusting strip abuts against the first limiting boss.
[0022] Preferably, two first positioning pins are provided on the first positioning block, and first pin holes adapted to the first positioning pins are provided at the bottom of the first positioning plate. The first positioning pins are arranged in the first pin holes, and the first positioning pins and the first pin holes are arranged in one-to-one correspondence.
[0023] Preferably, at least two first right-angle limiting bosses are provided on the first positioning block, and the two first right-angle limiting bosses are arranged diagonally;
[0024] A plurality of first mounting screws and a plurality of first bosses are further provided on the first positioning block. The plurality of first mounting screws and the plurality of first bosses are arranged in the space enclosed by the two first right-angle limiting bosses. The first positioning pins are arranged inside the first mounting screws and the first bosses; the plurality of first mounting screws are arranged at equal intervals, and the plurality of first bosses are arranged at equal intervals; and the first mounting screws and the first bosses are arranged alternately.
[0025] Preferably, a first fine-tuning screw is provided at the end corner of the first positioning block. By providing the fine-tuning screw, the adjustment function in 4 directions (i.e., forward tilt, backward tilt, left tilt and right tilt) can be realized.
[0026] As a preferred embodiment, the second positioning assembly includes a second adjusting strip, a second positioning plate and a second positioning block; the second positioning block is arranged on the second supporting boss; the second positioning plate is arranged on the second positioning block; the second adjusting strip is arranged on the second positioning plate by a second fastening screw.
[0027] Preferably, a second positioning groove is provided on the second adjusting strip, and at least two second positioning bosses adapted to the second positioning groove are provided on the second positioning plate. The second positioning groove is sleeved on the second positioning bosses; the second adjusting strip is connected to the reinforcing member.
[0028] Preferably, a second support boss is further provided on the second adjusting strip, and the second support boss abuts against the rear end plate of the stack; the top of the second adjusting strip is connected to the limiting strip by screws, and a gap is provided between the second adjusting strip and the limiting strip.
[0029] Preferably, a second limiting boss is further provided on the second positioning plate, the second limiting boss is arranged in parallel with the second positioning boss, and one side of the second adjusting strip abuts against the second limiting boss.
[0030] Preferably, two second positioning pins are provided on the second positioning block, second pin holes adapted to the second positioning pins are provided at the bottom of the second positioning plate, the second positioning pins are arranged in the second pin holes, and the second positioning pins and the second pin holes are arranged in one-to-one correspondence.
[0031] Preferably, at least two second right-angle limiting bosses are provided on the second positioning block, and the two second right-angle limiting bosses are arranged diagonally;
[0032] A plurality of second mounting screws and a plurality of second bosses are further provided on the second positioning block, the plurality of second mounting screws and the plurality of second bosses are arranged in the space enclosed by the two second right-angle limiting bosses, and the second positioning pins are arranged inside the second mounting screws and the second bosses; the plurality of second mounting screws are arranged at equal intervals, and the plurality of second bosses are arranged at equal intervals; and the second mounting screws and the second bosses are arranged alternately.
[0033] Preferably, a second fine-tuning screw is provided at the end corner of the second positioning block. By providing the fine-tuning screw, the adjustment functions in 4 directions (i.e., forward tilt, backward tilt, left tilt, and right tilt) can be realized.
[0034] As a preferred embodiment, four first positioning components are provided, and the four first positioning components are symmetrically arranged on both sides of the backing plate; two second positioning components are provided, and the two second positioning components are arranged at both ends of the backing plate.
[0035] As a preferred embodiment, the reinforcing member is arranged to enclose the outside of the stack; the reinforcing member is respectively connected to the first adjusting strip and the second adjusting strip by screws; a plurality of third fine-tuning screws are provided on the reinforcing member; and the plurality of third fine-tuning screws are evenly arranged on the reinforcing member.
[0036] The utility model has the following beneficial effects compared with the prior art: Through the structure of this application, the processing precision of parts can be greatly reduced, and the assembly precision of the whole stack can be effectively improved. When using the structure of this application for stack pressing, the stiffness of the whole stack can be improved during the stack encapsulation process. The structure of this application has multiple fine-tuning methods, which can effectively reduce the influence of error accumulation of each part on the assembly consistency of the whole stack. The structure of this application can effectively solve problems such as poor stiffness of the front and rear end plates of the stack, cumbersome debugging of the stack pressing fixture, low positioning accuracy, and poor coordination and reliability of the whole stack caused by unreasonable design of the stack pressing fixture. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0038] Figure 1 It is a schematic diagram of the overall structure of a stack pressing fixture for a fuel cell stack according to an embodiment of this application;
[0039] Figure 2 is Figure 1 a schematic diagram of the structure of the press assembly;
[0040] Figure 3 is Figure 1 a schematic diagram of the structure of the backing plate;
[0041] Figure 4 is Figure 1 a schematic diagram of the structure of the pressing block assembly;
[0042] Figure 5 is Figure 1 a schematic diagram of the structure of the first positioning assembly;
[0043] Figure 6 is Figure 5 a schematic diagram of the structure of the first positioning block;
[0044] Figure 7 is Figure 1 a schematic diagram of the structure of the second positioning assembly;
[0045] Figure 8 is Figure 7 a schematic diagram of the structure of the second positioning block. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0048] In this application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.
[0049] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.
[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0051] Specifically, as Figures 1 to 2As shown in the figure, an embodiment of the utility model provides a fuel cell stack pressing fixture, which is applicable to the stack 100 and includes a pressing block assembly 10, a press machine assembly 20, a reinforcement member 30, a first positioning assembly 40, a second positioning assembly 50, an airtightness testing assembly 60, and a backing plate 70;
[0052] The press machine assembly 20 includes a bottom plate 21, a first limiting member 22 disposed at one end of the bottom plate 21, and a second limiting member 23 disposed at the other end of the bottom plate 21; the backing plate 70 is disposed on the bottom plate 21; the airtightness testing assembly 60 is disposed on the side of the backing plate 70 away from the bottom plate 21; the stack 100 is disposed on the side of the airtightness testing assembly 60 away from the backing plate 70; the pressing block assembly 10 is disposed on the top of the stack 100;
[0053] Both the first positioning assembly 40 and the second positioning assembly 50 are disposed on the backing plate 70, and the ends of the first positioning assembly 40 and the second positioning assembly 50 away from the backing plate 70 are respectively in contact with the stack 100; the reinforcement member 30 is respectively connected to the first positioning assembly 40 and the second positioning assembly 50.
[0054] As a preferred embodiment, as Figure 3 shown, a plurality of first support bosses 71 are disposed on one side surface of the backing plate 70, and a plurality of second support bosses 72 are disposed on the other side surface; the first support bosses 71 and the second support bosses 72 are arranged in one-to-one correspondence; the first positioning assembly 40 and the second positioning assembly 50 are respectively disposed on the second support bosses 72.
[0055] As a preferred embodiment, at least two limiting right angles A are disposed on each of the second support bosses 72, and the limiting right angles A are disposed close to the outer side of the second support bosses 72.
[0056] As a preferred embodiment, the first positioning assembly 40 and the second support bosses 72 are arranged in one-to-one correspondence, and the second positioning assembly 50 and the second support bosses 72 are arranged in one-to-one correspondence; the sum of the numbers of the first positioning assembly 40 and the second positioning assembly 50 is equal to the number of the second support bosses 72; the airtightness testing assembly 60 is disposed inside the second support bosses 72.
[0057] By providing the first support boss 71 and the second support boss 72 on both side surfaces of the backing plate 70, it is beneficial to reduce the contact surface between the backing plate 70 and the press block assembly 10, improve the mating accuracy between the backing plate 70 and the press block assembly 10, and can reduce the machining accuracy of other areas (areas other than the support bosses) of the backing plate 70. By providing the limiting right angle A, the positions of the first positioning assembly 40 and the second positioning assembly 50 on the backing plate 70 can be quickly aligned, and the first positioning assembly 40 and the second positioning assembly 50 can be quickly limited, thereby improving the debugging efficiency of the stacking fixture and having the function of accommodating machining errors.
[0058] As a preferred embodiment, as Figure 4 shown, the press block assembly 10 includes a limiting block 11 and a press block 12 provided on the limiting block 11. The limiting block 11 is provided on the top of the fuel cell stack 100, and the limiting block 11 is respectively connected to the first positioning assembly 40 and the second positioning assembly 50; when the fuel cell stack stacking fixture is in a working state, the limiting block 11 is embedded in the press block 12, and the press block 12 is connected to the limiting block 11 by screws. With this setting, the stiffness of the limiting block 11 can be effectively improved.
[0059] Preferably, a plurality of limiting strips 111 are provided on the side surface of the limiting block 11, and the first positioning assembly 40 and the second positioning assembly 50 are respectively connected to the limiting strips 111; the limiting strips 111 are respectively arranged in one-to-one correspondence with the first positioning assembly 40 and the second positioning assembly 50. The one-to-one correspondence setting means that one first positioning assembly 40 is provided on one limiting strip 111, or one second positioning assembly 50 is provided on one limiting strip 111, rather than one first positioning assembly 40 and one second positioning assembly 50 being provided on one limiting strip 111 at the same time.
[0060] As a preferred embodiment, the first limiting member 22 and the second limiting member 23 are symmetrically arranged.
[0061] As a preferred embodiment, the reinforcing member 30 is respectively connected to one end of the first positioning assembly 40 away from the backing plate 70 and one end of the second positioning assembly 50 away from the backing plate 70.
[0062] As a preferred embodiment, the airtight test assembly 60 is fixed to the backing plate 70 by a positioning pin.
[0063] As a preferred embodiment, as Figures 5 to 6As shown in the figure, the first positioning component 40 includes a first adjusting bar 41, a first positioning plate 42, and a first positioning block 43; the first positioning block 43 is arranged on the second support boss 72; the first positioning plate 42 is arranged on the first positioning block 43; the first adjusting bar 41 is arranged on the first positioning plate 42 through a first fastening screw 44. When stacking, loosen the first fastening screw 44, and under the action of the stacking force, the first adjusting bar 41 moves downward together with the stack core. To ensure the stacking effect, the movement stroke of the adjusting bar needs to be greater than the compression height of the stack core.
[0064] Preferably, a first positioning groove 411 is arranged on the first adjusting bar 41, and at least two first positioning bosses 421 adapted to the first positioning groove 411 are arranged on the first positioning plate 42. The first positioning groove 411 is sleeved on the first positioning boss 421; the first adjusting bar 41 is connected to the reinforcing member 30. By connecting the reinforcing member 30 to the first adjusting bar 41, the connection stiffness between components can be effectively improved, and the positioning accuracy can be further enhanced.
[0065] Preferably, a first support boss 412 is further arranged on the first adjusting bar 41, and the first support boss 412 abuts against the rear end plate of the fuel cell stack 100; the top of the first adjusting bar 41 is connected to the limiting bar 111 through a screw, and a gap is arranged between the first adjusting bar 41 and the limiting bar 111. By providing this gap, the stack core can be effectively prevented from being affected by lateral forces.
[0066] Preferably, a first limiting boss 422 is further arranged on the first positioning plate 42. The first limiting boss 422 is arranged in parallel with the first positioning boss 421, and one side of the first adjusting bar 41 abuts against the first limiting boss 422.
[0067] By the cooperation of the first positioning groove 411 and the first positioning boss 421, that is, by adopting surface contact sliding fit, a better sliding effect can be achieved, and the first adjusting bar 41 can be adjusted in height according to the height of the fuel cell stack; the first limiting boss 422 plays a role of limiting and guiding during the sliding process. The first fastening screw is used to lock the position of the first adjusting bar 41 on the first positioning plate 42. When stacking, the first fastening screw locks the first adjusting bar 41, and when pressing the stack, the first fastening screw needs to loosen the first adjusting bar 41.
[0068] Preferably, two first positioning pins 431 are provided on the first positioning block 43, and a first pin hole (not labeled in the figure) adapted to the first positioning pins 431 is provided at the bottom of the first positioning plate 42. The first positioning pins 431 are arranged in the first pin holes, and the first positioning pins 431 and the first pin holes are arranged in one-to-one correspondence. Through the cooperation of the first positioning pins 431 and the first pin holes, the installation position accuracy of the first positioning plate 42 and the first positioning block 43 can be effectively improved.
[0069] Preferably, at least two first right-angle limiting bosses 432 are provided on the first positioning block 43, and the two first right-angle limiting bosses 432 are arranged diagonally.
[0070] A plurality of first mounting screws 433 and a plurality of first bosses 434 are further provided on the first positioning block 43. The plurality of first mounting screws 433 and the plurality of first bosses 434 are arranged in the space enclosed by the two first right-angle limiting bosses 432. The first positioning pins 431 are arranged inside the first mounting screws 433 and the first bosses 434. The plurality of first mounting screws 433 are arranged at equal intervals, and the plurality of first bosses 434 are arranged at equal intervals. And the first mounting screws 433 and the first bosses 434 are arranged alternately.
[0071] By providing the first boss 434 on the mounting surface of the first positioning block 43, the influence of the flatness of the contact surface on the installation accuracy can be reduced. The first boss 434 can reduce the contact area, reduce the processing difficulty of the surface accuracy, and improve the assembly accuracy. The two right-angle limiting bosses 432 are distributed diagonally, which can limit the sliding of the first positioning plate 42 on the surface of the first positioning block 43 and improve the relative position accuracy of the first positioning plate 42 and the first positioning block 43. The first positioning plate 42 and the first positioning block 43 can be fixed by the first mounting screws 433.
[0072] Preferably, a first fine-tuning screw 435 is provided at the end corner of the first positioning block 43. By providing the fine-tuning screw, the adjustment function in four directions (i.e., forward tilt, backward tilt, left tilt, and right tilt) can be realized.
[0073] As a preferred embodiment, as Figures 7 to 8 shown, the second positioning assembly 50 includes a second adjusting bar 51, a second positioning plate 52, and a second positioning block 53; the second positioning block 53 is provided on the second support boss 72; the second positioning plate 52 is provided on the second positioning block 53; the second adjusting bar 51 is provided on the second positioning plate 52 through a second fastening screw 54. When piling up, loosen the second fastening screw 54, and under the action of the piling-up force, the second adjusting bar 51 moves downward together with the core. To ensure the effect of piling up, the movement stroke of the adjusting bar needs to be greater than the compression height of the core.
[0074] Preferably, a second positioning groove 511 is provided on the second adjusting strip 51, and at least two second positioning bosses 521 adapted to the second positioning groove 511 are provided on the second positioning plate 52. The second positioning groove 511 is sleeved on the second positioning boss 521; the second adjusting strip 51 is connected to the reinforcing member 30. By connecting the reinforcing member 30 to the second adjusting strip 51, the connection stiffness between components can be effectively improved, and the positioning accuracy can be further enhanced.
[0075] Preferably, a second supporting boss 512 is further provided on the second adjusting strip 51, and the second supporting boss 512 abuts against the rear end plate of the stack 100; the top of the second adjusting strip 51 is connected to the limiting strip 111 by screws, and a gap is provided between the second adjusting strip 51 and the limiting strip 111. By providing this gap, the stack core can be effectively prevented from being subjected to lateral forces.
[0076] Preferably, a second limiting boss 522 is further provided on the second positioning plate 52. The second limiting boss 522 is arranged in parallel with the second positioning boss 521, and one side of the second adjusting strip 51 abuts against the second limiting boss 522.
[0077] Through the cooperation of the second positioning groove 511 and the second positioning boss 521, that is, by adopting surface contact sliding fit, a better sliding effect can be achieved, and the second adjusting strip 51 can be adjusted in height correspondingly according to the height of the stack; the second limiting boss plays a role of limiting and guiding during the sliding process, and the second fastening screw is used to lock the position of the second adjusting strip on the second positioning plate. The second fastening screw locks the second adjusting strip during stacking, and the second fastening screw needs to loosen the second adjusting strip during pressing the stack.
[0078] Preferably, two second positioning pins 531 are provided on the second positioning block 53, and a second pin hole (not marked in the figure) adapted to the second positioning pin 531 is provided at the bottom of the second positioning plate 52. The second positioning pin 531 is arranged in the second pin hole, and the second positioning pin 531 and the second pin hole are arranged in one-to-one correspondence. Through the cooperation of the second positioning pin 531 and the second pin hole, the installation position accuracy of the second positioning plate 52 and the second positioning block 53 can be effectively improved.
[0079] Preferably, at least two second right-angle limiting bosses 532 are provided on the second positioning block 53, and the two second right-angle limiting bosses 532 are arranged diagonally;
[0080] A plurality of second mounting screws 533 and a plurality of second bosses 534 are further provided on the second positioning block 53. The plurality of second mounting screws 533 and the plurality of second bosses 534 are arranged in the space enclosed by the two second right-angle limiting bosses 532. The second positioning pin 531 is arranged inside the second mounting screw 533 and the second boss 534. The plurality of second mounting screws 533 are arranged at equal intervals, and the plurality of second bosses 534 are arranged at equal intervals. Moreover, the second mounting screws 533 and the second bosses 534 are arranged alternately.
[0081] By providing the second boss 534 on the mounting surface of the second positioning block 53, the influence of the flatness of the contact surface on the mounting accuracy can be reduced. The second boss 534 can reduce the contact area, lower the processing difficulty of the surface accuracy, and improve the assembly accuracy. The two right-angle limiting bosses 532 are diagonally distributed, which can limit the sliding of the second positioning plate 52 on the surface of the second positioning block 53 and improve the relative position accuracy between the second positioning plate 52 and the second positioning block 53. The second positioning plate 52 and the second positioning block 53 can be fixed by the second mounting screws 533.
[0082] Preferably, a second fine-tuning screw 535 is provided at the end corner of the second positioning block 53. By providing the fine-tuning screw, the adjustment functions in four directions (i.e., forward tilt, backward tilt, left tilt, and right tilt) can be realized.
[0083] As a preferred embodiment, four first positioning components 40 are provided. The four first positioning components 40 are symmetrically arranged on both sides of the backing plate 70. Two second positioning components 50 are provided. The two second positioning components 50 are arranged at both ends of the backing plate 70.
[0084] As a preferred embodiment, the reinforcing member 30 is arranged to enclose the outside of the fuel cell stack 100. The reinforcing member 30 is respectively connected to the first adjusting bar 41 and the second adjusting bar 51 by screws. A plurality of third fine-tuning screws 31 are provided on the reinforcing member 30. The plurality of third fine-tuning screws 31 are evenly arranged on the reinforcing member 30. Through the third fine-tuning screws 31, the above-mentioned first positioning component 40 and second positioning component 50 can be coordinately adjusted to further improve the positioning accuracy.
[0085] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims
1. A fuel cell stack pressing jig, suitable for a fuel cell stack, characterized in that: It includes a pressing block assembly, a press assembly, a reinforcing member, a first positioning assembly, a second positioning assembly, an airtight test assembly and a backing plate; The press assembly includes a bottom plate, a first stopper disposed at one end of the bottom plate, and a second stopper disposed at the other end of the bottom plate; the pad is disposed on the bottom plate; the airtight test assembly is disposed on a side of the pad away from the bottom plate; The battery stack is arranged on the side of the airtight test assembly away from the backing plate; the pressing block assembly is arranged on the top of the battery stack; The first positioning assembly and the second positioning assembly are both arranged on the pad, and one end of the first positioning assembly away from the pad and one end of the second positioning assembly away from the pad are respectively abutted against the battery stack; the reinforcement is respectively connected to the first positioning assembly and the second positioning assembly.
2. The fuel cell stack pressing jig according to claim 1, characterized in that: A plurality of first supporting bosses are arranged on one side surface of the pad, and a plurality of second supporting bosses are arranged on the other side surface; the first supporting bosses and the second supporting bosses are arranged in one-to-one correspondence; the first positioning assembly and the second positioning assembly are respectively arranged on the second supporting bosses.
3. The fuel cell stack pressing jig according to claim 2, characterized in that: Each of the second supporting bosses is provided with at least two limiting right angles, and the limiting right angles are provided close to the outer side of the second supporting boss; The first positioning assembly is arranged in a one-to-one correspondence with the second supporting boss, and the second positioning assembly is arranged in a one-to-one correspondence with the second supporting boss; the sum of the number of the first positioning assemblies and the second positioning assemblies is equal to the number of the second supporting bosses; the airtight test assembly is arranged on the inner side of the second supporting boss.
4. The fuel cell stack pressing jig according to claim 3, characterized in that: The pressing block assembly includes a limit block and a pressing block arranged on the limit block, the limit block is arranged at the top of the fuel cell stack, and the limit block is respectively connected to the first positioning assembly and the second positioning assembly; when the fuel cell stack pressing jig is in a working state, the limit block is embedded in the pressing block, and the pressing block is connected to the limit block by screws.
5. The fuel cell stack pressing jig according to claim 4, characterized in that: A plurality of limit bars are arranged on the side of the limit block, and the first positioning component and the second positioning component are respectively connected to the limit bars; the limit bars are respectively arranged in one-to-one correspondence with the first positioning component and the second positioning component; The first limiting member and the second limiting member are symmetrically arranged; The reinforcing member is respectively connected to one end of the first positioning component away from the backing plate and one end of the second positioning component away from the backing plate; The airtight test assembly is fixed on the backing plate via positioning pins.
6. The fuel cell stack pressing jig according to claim 5, characterized in that: The first positioning assembly includes a first adjustment strip, a first positioning plate and a first positioning block; the first positioning block is arranged on the second supporting boss; the first positioning plate is arranged on the first positioning block; the first adjustment strip is arranged on the first positioning plate through a first fastening screw.
7. The fuel cell stack pressing jig according to claim 6, characterized in that: The first adjusting strip is provided with a first positioning groove, the first positioning plate is provided with at least two first positioning bosses adapted to the first positioning groove, the first positioning groove is sleeved on the first positioning boss; the first adjusting strip is connected to the reinforcing member; The first adjustment bar is also provided with a first support boss, and the first support boss is in contact with the rear end plate of the battery stack; the top of the first adjustment bar is connected to the limit bar by a screw, and a gap is provided between the first adjustment bar and the limit bar; The first positioning plate is also provided with a first limiting boss, the first limiting boss is arranged parallel to the first positioning boss, and one side edge of the first adjustment strip abuts against the first limiting boss; The first positioning block is provided with two first positioning pins, the bottom of the first positioning plate is provided with a first pin hole matched with the first positioning pin, the first positioning pin is arranged in the first pin hole, and the first positioning pin and the first pin hole are arranged in a one-to-one correspondence.
8. The fuel cell stack pressing jig according to claim 7, characterized in that: At least two first right-angle limiting bosses are arranged on the first positioning block, and the two first right-angle limiting bosses are arranged diagonally; The first positioning block is also provided with a plurality of first mounting screws and a plurality of first bosses, the plurality of first mounting screws and the plurality of first bosses are arranged in a space enclosed by the two first right-angle limiting bosses, the first positioning pin is arranged on the inner side of the first mounting screw and the first boss; the plurality of first mounting screws are arranged at equal intervals, the plurality of first bosses are arranged at equal intervals; and the first mounting screws and the first bosses are arranged alternately; A first fine-tuning screw is arranged on the end corner of the first positioning block.
9. The fuel cell stack pressing jig according to claim 8, characterized in that: The second positioning assembly includes a second adjustment bar, a second positioning plate and a second positioning block; the second positioning block is arranged on the second supporting boss; the second positioning plate is arranged on the second positioning block; the second adjustment bar is arranged on the second positioning plate through a second fastening screw.
10. The fuel cell stack pressing jig according to claim 9, characterized in that: The second adjustment strip is provided with a second positioning groove, the second positioning plate is provided with at least two second positioning bosses adapted to the second positioning groove, and the second positioning groove is sleeved on the second positioning boss; the second adjustment strip is connected to the reinforcement member; The second adjustment bar is also provided with a second supporting boss, which abuts against the rear end plate of the fuel cell stack; the top of the second adjustment bar is connected to the limit bar by screws, and a gap is provided between the second adjustment bar and the limit bar.
11. The fuel cell stack pressing jig according to claim 10, characterized in that: The second positioning plate is also provided with a second limiting boss, the second limiting boss is arranged parallel to the second positioning boss, and one side edge of the second adjustment strip abuts against the second limiting boss; The second positioning block is provided with two second positioning pins, the bottom of the second positioning plate is provided with a second pin hole adapted to the second positioning pin, the second positioning pin is arranged in the second pin hole, and the second positioning pin and the second pin hole are arranged one by one; At least two second right-angle limiting bosses are arranged on the second positioning block, and the two second right-angle limiting bosses are arranged diagonally; The second positioning block is also provided with a plurality of second mounting screws and a plurality of second bosses, and the plurality of second mounting screws and the plurality of second bosses are arranged in a space enclosed by two second right-angle limiting bosses, and the second positioning pin is arranged on the inner side of the second mounting screw and the second boss; the plurality of second mounting screws are arranged at equal intervals, and the plurality of second bosses are arranged at equal intervals; and the second mounting screws and the second bosses are arranged alternately.
12. The fuel cell stack pressing jig according to claim 11, characterized in that: A second fine-tuning screw is provided on the end corner of the second positioning block; There are four first positioning components, which are symmetrically arranged on both sides of the pad; there are two second positioning components, which are arranged on both ends of the pad; The reinforcement is enclosed and arranged on the outside of the battery stack; the reinforcement is connected to the first adjustment strip and the second adjustment strip respectively through screws; a plurality of third fine-tuning screws are arranged on the reinforcement; and a plurality of the third fine-tuning screws are evenly arranged on the reinforcement.