CN217280891U - Fuel cell packaging structure - Google Patents

Abstract

The utility model discloses a fuel cell packaging structure belongs to fuel cell technical field. The fuel cell packaging structure comprises a packaging box, a floating end plate and a packaging back plate, wherein the floating pressing assembly is detachably connected with the packaging box; the floating compression assembly comprises an adjusting piece, a conducting piece and an elastic piece arranged between the conducting piece and the floating end plate, wherein the adjusting piece is in threaded connection with the adjusting hole of the packaging back plate, one end of the conducting piece is abutted to the elastic piece, and the other end of the conducting piece is abutted to the adjusting piece and can rotate relative to the adjusting piece. The transmission piece is arranged between the adjusting piece and the elastic piece to separate the adjusting piece from the elastic piece, so that the abrasion of the elastic piece is avoided; the conducting piece pushes the elastic piece along the direction close to or far away from the floating end plate, and the elastic piece can generate stable pretightening force to realize the stable press mounting of the floating end plate on the galvanic pile.

Description

Fuel cell packaging structure

Technical Field

The utility model relates to a fuel cell technical field especially relates to a fuel cell packaging structure.

Background

The fuel cell is a device for directly converting chemical energy of fuel into electric energy, can be applied to a motor, and is a core component of a new energy automobile.

The known assembly pressing structure of the fuel cell comprises a stack, a packaging box body, a floating end plate, a packaging cover plate, a spring and a pressing bolt. The galvanic pile is positioned in the packaging box body, the galvanic pile is provided with a floating end plate, and the packaging cover plate is covered on the floating end plate. The compression bolt is in threaded connection with the packaging cover plate, a spring is arranged between the compression bolt and the floating end plate, and the compression bolt is rotated to extrude the spring to achieve up-and-down adjustment of the floating end plate.

However, the pressing bolt directly rotates in a friction mode relative to the spring, so that the spring is prone to being stressed unstably and inclined, the pre-tightening force generated by the spring is changed, and finally the pressing force of the galvanic pile is unstable; and the spring is easy to wear and shorten the service life after long-time use, which is not favorable for the stable operation of the fuel cell.

Therefore, it is desirable to provide a fuel cell package structure to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fuel cell packaging structure, when adjusting the floating end plate, the elastic component does not take place slope and pressurized stability, and the elastic component does not take place the friction with the regulating part moreover, increase of service life.

In order to realize the purpose, the following technical scheme is provided:

a fuel cell packaging structure comprises a packaging box for containing a galvanic pile, a floating end plate which is arranged in the packaging box in a floating mode and is tightly pressed on the galvanic pile, a packaging back plate which is detachably connected with the packaging box, and a floating pressing assembly which is arranged between the packaging back plate and the floating end plate, wherein the packaging back plate is provided with an adjusting hole;

the floating compression assembly comprises an adjusting piece, a conducting piece and an elastic piece arranged between the conducting piece and the floating end plate, wherein the adjusting piece is in threaded connection with the position of the adjusting hole of the packaging back plate, one end of the conducting piece is abutted to the elastic piece, and the other end of the conducting piece is abutted to the adjusting piece.

As an alternative of the fuel cell packaging structure, a guide groove is concavely arranged on the packaging back plate, the adjusting hole is communicated with the guide groove, and the conducting piece is slidably arranged in the guide groove.

As an alternative of the fuel cell packaging structure, the elastic member is a spring or a disc spring, the floating end plate is convexly provided with a guide protrusion, and the spring or the disc spring is sleeved on the guide protrusion; one end of the conducting piece, which is close to the spring or the disc spring, is provided with a slot, and a part of the guide protrusion is inserted into the slot.

As an alternative of a fuel cell packaging structure, the packaging box comprises a packaging shell and an anode end plate which are detachably connected, and a containing cavity with two through ends is formed in the packaging shell; the receiving cavity has a first port and a second port; the positive pole end plate will first port seals, the encapsulation backplate can dismantle connect in the encapsulation casing just will the second port seals, the pile stack in hold the intracavity and support in the positive pole end plate, the end plate that floats is located hold the intracavity, be used for compressing tightly the pile.

As fuel cell packaging structure's alternative, still include the locating lever, the side of floating end plate is concave to be equipped with first spacing groove, the inside wall of encapsulation casing is concave to be equipped with the second spacing groove, first spacing groove with the second spacing groove encloses to establish and forms spacing space, the one end of locating lever with the positive pole end plate is connected, the other end of locating lever is worn to locate spacing space.

As an alternative of the fuel cell packaging structure, the positioning rod is provided in plurality, and the plurality of positioning rods are arranged at intervals along the circumferential direction of the inner side wall of the packaging shell.

As an alternative of the fuel cell packaging structure, a side wall of the packaging shell is provided with an assembly opening communicated with the accommodating cavity, and the electric pile can enter and exit the accommodating cavity from the assembly opening.

As an alternative to the fuel cell packaging structure, a support plate is further included, and opposite ends of the support plate are respectively connected to the side walls of the fitting opening.

As an alternative of the fuel cell packaging structure, the fuel cell packaging structure further comprises a pull rod, one end of the pull rod is connected with the anode end plate, and the other end of the pull rod penetrates through the side wall of the assembling opening and is connected with the packaging back plate.

As an alternative to the fuel cell packaging structure, the floating compression assemblies are arranged at intervals in a plurality of groups.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a fuel cell packaging structure, when rotating the regulating part and adjusting the pressure equipment power that the floating end plate pressed to the pile, the conduction piece sets up between regulating part and elastic component, separate regulating part and elastic component, avoided the direct contact of regulating part and elastic component, a terminal surface friction of regulating part relative conduction piece, the conduction piece transmits the displacement of regulating part to the elastic component, the elastic component does not take place the friction with the conduction piece all the time, the wearing and tearing of elastic component have been avoided, the elastic component life has been prolonged, fuel cell steady operation; because the conducting piece can push the elastic piece along the direction close to or far away from the floating end plate, the elastic piece does not incline and generates stable pretightening force, the stable press mounting of the floating end plate on the electric pile is realized, and the stable operation of the fuel cell is facilitated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is an exploded view of a fuel cell package according to an embodiment of the present invention;

fig. 2 is a partial cross-sectional view of a floating hold-down assembly in an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic structural diagram of the package housing according to an embodiment of the present invention.

Reference numerals:

1. packaging the shell; 2. an anode end plate; 3. packaging the back plate; 4. a floating hold-down assembly; 5. a floating end plate; 6. a galvanic pile; 7. positioning a rod; 8. a support plate; 9. a pull rod;

11. a second limit groove; 12. an assembly port; 13. a guide post; 14. a sealing groove;

31. an adjustment hole; 32. a guide groove; 33. a via hole;

41. an adjustment member; 411. a guide projection; 412. a first limit groove; 42. a conductive element; 43. an elastic member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The fuel cell comprises an electric pile and a fuel cell packaging structure packaged on the outer side of the electric pile, the electric pile comprises bipolar plates and a membrane electrode assembly which are alternately stacked in sequence, and the fuel cell packaging structure is connected with a vehicle. The fuel cell can be applied to the fields of new energy automobiles, electric bicycles and the like. The fuel cell packaging structure is one of main accessories of the fuel cell, and has an IP 67-level waterproof sealing effect on the galvanic pile, so that the impact resistance and shock resistance of the galvanic pile are improved, and the normal use of the galvanic pile is ensured.

The current stage fuel cell packaging structure comprises a galvanic pile, a packaging box body, a floating end plate, a packaging cover plate, a spring and a compression bolt. The galvanic pile is located the encapsulation box, and the end plate setting that floats is on the upper portion of galvanic pile, and encapsulation apron lid is established on the end plate that floats, and the encapsulation apron has the through-hole that runs through its thickness direction, and the one end of spring offsets with the end plate that floats, and clamp bolt and through-hole screw-thread fit, and the one end of clamp bolt orientation end plate that floats compresses tightly with the other end of spring. The packaging box body is only provided with one port for the power supply stack to enter and exit.

The floating end plate is adjusted up and down by rotating the compression bolt and extruding the spring, so that the adaptive adjustment of the press-fitting force provided by the floating end plate to the stack is realized. However, in the process of adjusting the press-fitting force, the press-fitting bolt rotates relative to the spring, the press-fitting bolt and the spring rub, on one hand, the spring is easy to incline, so that the press-fitting force applied to the pile is unstable, and on the other hand, the spring is not beneficial to the stable operation of the fuel cell after being worn and failed.

In order to stably bear the force, avoid abrasion and prolong the service life of the elastic member in the process of adjusting the press-fitting force applied to the stack, the embodiment provides a fuel cell package structure, and the details of the embodiment are described in detail below with reference to fig. 1 to 4.

The fuel cell packaging structure comprises a packaging box, a floating end plate 5 and a packaging back plate 3 detachably connected with the packaging box, wherein a galvanic pile 6 can be stacked in the packaging box, and the floating end plate 5 is arranged above the galvanic pile 6 in a pressing mode. Wherein the encapsulation case is equipped with the chamber that holds that both ends link up including encapsulation casing 1 and positive pole end plate 2 in the encapsulation casing 1, holds the chamber and has first port and second port, holds the chamber and pile 6 bipolar plate size looks adaptation, holds the chamber and is used for piling up pile 6, and end plate 5 floats is located and holds the intracavity and press a terminal surface that keeps away from positive pole end plate 2 at pile 6. The adoption sets up the connecting hole that supplies the fastener to pass on anode end plate 2, is convenient for anode end plate 2 to adopt fastener detachably to connect in a port department of encapsulation casing 1, and anode end plate 2 seals first port. A connecting hole for a fastener to pass through is also formed in the packaging back plate 3, so that the packaging back plate 3 can be detachably connected to the other port of the packaging shell 1 by the fastener, and the second port is sealed by the packaging back plate 3. In the assembling process, an operator can optionally assemble the anode end plate 2 and the packaging back plate 3 at any one of the two ports of the packaging shell 1, so that the assembling difficulty is reduced. In this embodiment, the floating end plate 5 is designed as a one-piece floating plate for compressing the stack 6. One end face of the floating end plate 5 is abutted to the galvanic pile 6, a plurality of groups of floating pressing assemblies 4 are uniformly arranged on the other end face at intervals, and the galvanic pile 6 is pressed between the floating end plate 5 and the anode end plate 2. The multiple groups of floating compaction assemblies 4 enable the galvanic pile 6 to be stressed uniformly in the process that the floating end plate 5 presses the galvanic pile 6.

The packaging shell 1 is made of non-metal materials, such as carbon fibers, and the galvanic pile 6 is insulated from the packaging structure. The package housing 1 may be, but is not limited to, a rectangular structure.

In the implementation, the package housing 1 is only designed with one accommodating cavity, in other embodiments, the package housing 1 may be provided with a plurality of accommodating cavities, and the electric pile 6 with different thicknesses may be integrated in one package housing 1; the dimensions of the plurality of receiving cavities are adapted to the galvanic pile 6. The electric pile 6 with different sizes can be integrated in one packaging shell 1.

As shown in fig. 1 and fig. 2, the adjustment holes 31 are formed through the package back plate 3 in the thickness direction, and each set of floating pressure components 4 includes an adjustment member 41, a conductive member 42, and an elastic member 43 disposed between the conductive member 42 and the floating end plate 5. The elastic member 43 may be, but is not limited to, a disc spring or a spring. The adjusting piece 41 is screwed on the adjusting hole 31 of the packaging back plate 3, two ends of the conducting piece 42 are respectively elastically abutted with the tail end of the adjusting piece 41 and the elastic piece 43, and the pressing force of the floating end plate 5 to the stack 6 can be adjusted by rotating the adjusting piece 41, and the distance between the floating end plate 5 and the anode end plate 2 can be changed. The adjusting member 41 in this embodiment is a set screw.

In short, when the set screw is rotated to adjust the press-fitting force of the floating end plate 5 to the stack 6, the adjusting piece 41 can rotate relative to the conducting piece 42, the elastic piece 43 does not rotate relative to the conducting piece 42, for example, the contact surface of the conducting piece 42 and the adjusting piece 41 is smoothed, and the contact surface of the conducting piece 42 and the elastic piece 43 is roughened; or the contact area between the adjuster 41 and the conductive element 42 is smaller than the contact area between the elastic element 43 and the conductive element 42, that is, the sliding friction force between the adjuster 41 and the conductive element 42 is smaller than the static friction force between the elastic element 43 and the conductive element 42. Since the conduction member 42 is disposed between the adjustment member 41 and the elastic member 43, the adjustment member 41 is spaced from the elastic member 43 by direct contact, and friction between the adjustment member 41 and the elastic member 43 is prevented. In the actual adjusting process, the adjusting part 41 slides and rubs against the end face of the conducting part 42, and the conducting part 42 transfers the moving force of the adjusting part 41 to the elastic part 43, so that the abrasion of the elastic part 43 is avoided, the service life of the elastic part 43 is prolonged, and the stable operation of the fuel cell is facilitated. Because the conductive piece 42 pushes the elastic piece 43 along the vertical direction, the elastic piece 43 only bears the pressure along the vertical direction and can generate stable pretightening force, and the stable press mounting of the floating end plate 5 on the electric pile 6 is realized.

When the whole thickness of galvanic pile 6 diminishes or the pressure equipment power needs to be increased, rotate adjusting part 41 and can promote the direction that the end plate 5 that floats moves towards being close to galvanic pile 6, and then increase the pressure that the end plate 5 that floats pressed to galvanic pile 6, realize the regulation to galvanic pile 6's pressure equipment power, galvanic pile 6 can be stably encapsulated. Because the distance between the floating end plate 5 and the anode end plate 2 is variable, the fuel cell packaging structure can package the electric pile 6 with different thicknesses, and the application range of the packaging structure is expanded.

As shown in fig. 2, an adjusting hole 31 and a guide groove 32 are disposed on the package back plate 3 along the thickness direction, the inner diameter of the adjusting hole 31 is smaller than the inner diameter of the guide groove 32, the adjusting hole 31 is a threaded hole, the adjusting hole 31 is vertically communicated with the guide groove 32, the adjusting hole 31 and the guide groove 32 are coaxially disposed, an adjusting member 41 is screwed in the adjusting hole 31, and a conductive member 42 is slidably disposed in the guide groove 32. During the rotation of the adjusting member 41, the conductive member 42 slides along the guide groove 32, so that the conductive member 42 can only slide up and down, and the accuracy of the movement of the conductive member 42 is ensured. When the movable range of the floating compressing assembly 4 needs to be extended, the design length of the adjusting member 41 can be extended; when the thickness of the stack 6 is thin, it is also possible to use the designed length of the extension conductive member 42 without extending the length of the adjustment member 41. In some application scenarios, the accuracy of the thread of the adjusting hole 31 is improved, which is beneficial to improve the accuracy of the pressure of the adjusting piece 41 on the floating end plate 5.

When the elastic member 43 is a disc spring, a guide protrusion 411 is disposed on an end surface of the floating end plate 5 close to the conductive member 42, the disc spring is sleeved on the guide protrusion 411, a slot is disposed on an end of the conductive member 42 close to the spring, and a portion of the guide protrusion 411 is inserted into the slot and can slide up and down relative to the slot. The guide protrusion 411 is additionally arranged to be matched with the slot of the conduction piece 42, so that the guide protrusion 411 can slide up and down relative to the slot of the conduction piece 42. In some application scenarios, the upper and lower ends of the disc spring may be welded with the floating end plate 5 and the conductive member 42, respectively.

As shown in fig. 3 and fig. 4, in order to position the stack 6 and the floating end plate 5, the fuel cell package structure further includes a positioning rod 7, a first limit groove 412 is concavely arranged on the side surface of the floating end plate 5, a second limit groove 11 is concavely arranged on the inner side wall of the package casing 1, the first limit groove 412 and the second limit groove 11 are enclosed to form a limit space, one end of the positioning rod 7 is inserted into the blind hole of the anode end plate 2, the other end of the positioning rod 7 is penetrated into the limit space, the blind hole corresponds to the limit space, and the positioning rod 7 is arranged along the vertical direction. The length of the positioning rod 7 can be designed according to the overall thickness of the actual stack 6 and the floating end plate 5, and is not limited too much. The positioning rod 7 is matched with the first limiting groove 412 of the floating end plate 5, and the floating end plate 5 can only move up and down in the process of floating and adjusting the pressure stacking force. The positioning rod 7 is abutted against the first limiting groove 412 and the second limiting groove 11 respectively, so that a gap is generated between the floating end plate 5 and the packaging shell 1, and the floating end plate 5 is prevented from colliding with the packaging shell 1 in the adjusting process.

As shown in fig. 4, a plurality of positioning rods 7 are provided at intervals in the circumferential direction along the four side walls of the package case 1. The positioning rods 7 are mutually constrained, and the assembly precision of the electric pile 6 and the floating end plate 5 is further improved.

In some application scenarios, as shown in fig. 1, a side wall of the package housing 1 is provided with an assembling port 12, the assembling port 12 is communicated with the accommodating cavity, and the stack 6 may be assembled into the accommodating cavity of the package housing 1 from the assembling port 12 in a lateral direction. In this embodiment, the package housing 1 can be placed into the stack 6 from the first port and the second port, and can also be placed into the stack 6 from the assembly port 12 on the side surface, so that the assembly manner of the package housing 1 is increased, and the package housing is suitable for different types of assembly manipulators.

Due to the addition of the assembly opening 12, in order to improve the overall structural strength of the package housing 1, the fuel cell package structure further includes a support plate 8, and opposite ends of the support plate 8 are respectively connected to the sidewalls of the assembly opening 12. Specifically, a plurality of hollow structures are arranged on the support plate 8, and the hollow structures can be triangular, circular, arched and the like, so that the structural strength of the support plate 8 is improved, and the weight of the support plate 8 is reduced.

When the electric pile 6 is exerted pressure equipment power by holding screw, the electric pile 6 can be given positive pole end plate 2 and 3 reaction forces of encapsulation backplate simultaneously, in order to further guarantee encapsulation casing 1 respectively with the positive pole end plate 2 with the packaging backplate between 3 stability of being connected, fuel cell packaging structure still includes pull rod 9, be connected the one end and the positive pole end plate 2 of pull rod 9, the other end passes the lateral wall of assembly opening 12 and is connected with encapsulation backplate 3, pull rod 9 passes the frame of assembly opening 12, avoid occupying the inner space of encapsulation casing 1.

As shown in fig. 1 and 4, the guide posts 13 are arranged at two ports of the package housing 1 at intervals, so that the assembly of the anode end plate 2 and the package back plate 3 with the package housing 1 is facilitated, and the assembly efficiency is improved. For the assembly of the electric pile 6, the ejector rod of the press is convenient to act on the electric pile 6, a plurality of through holes 33 are arranged on the packaging back plate 3 in a penetrating manner, and after the ejector rod of the press passes through the through holes 33, the ejector rod of the press is convenient to eject to the area of the floating end plate 5 without the guide protrusion 411. A first sealing ring is arranged between the anode end plate 2 and the packaging shell 1, and a second sealing ring is arranged between the packaging back plate 3 and the packaging shell 1, so that the assembly sealing performance of the packaging structure is ensured. Specifically, two ports of the package housing 1 are provided with sealing grooves 14 for placing sealing rings.

The assembly steps of the fuel cell package structure in this embodiment are as follows:

1. firstly, fastening an anode end plate 2 and a packaging shell 1 into a whole through bolts;

2. then the anode end plate 2 and the packaging shell 1 are integrally placed on a lower tool of a press, and then the packaging back plate 3 is fixed on an upper tool of the press;

3. the positioning rod 7 penetrates through the second limiting groove 11 of the packaging shell 1 and is inserted into a corresponding blind hole in the anode end plate 2;

4. then, a plurality of electric piles 6 are sequentially placed into the accommodating cavity from the assembling port 12, stacked among a plurality of positioning rods 7 and supported on the anode end plate 2;

5. after the plurality of stacks 6 are stacked, the floating end plate 5, the elastic member 43, and the conductive member 42 are installed in order;

6. operating the press to enable ejector rods of an upper tool of the press to penetrate through the four through holes 33 on the packaging back plate 3, and pressing the ejector rods on the floating end plate 5;

7. operating the press to push down the ram (the speed must be very slow, preferably 0.01mm/s) until the stack 6 is compressed to the design size (the air-tight test is carried out halfway);

8. mounting the support plate 8 on the side wall of the assembly opening 12 by using bolts, mounting the packaging back plate 3 on the packaging shell 1, and further fastening the packaging back plate 3 and the anode end plate 2 by using a pull rod 9;

9. keeping the position state of the press unchanged, screwing the adjusting piece 41 into the adjusting hole 31 of the packaging backboard 3 and propping against the upper part of the conducting piece 42;

10. continuously and uniformly screwing the adjusting piece 41 by a torque wrench until the pressure displayed by the press is reduced to be less than 100N, and finally checking the torque of all the set screws;

11. and operating the press to withdraw the mandril of the upper tool, withdrawing the fuel cell packaging structure packaged with the electric pile 6 from the press, and installing other electric pile accessories.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a fuel cell packaging structure, including the packaging box that is used for holding galvanic pile (6), float set up in the packaging box and compress tightly in unsteady end plate (5) of galvanic pile (6), with packaging box can dismantle packaging backplate (3) of connecting and set up in packaging backplate (3) with unsteady subassembly (4) that compress tightly between end plate (5), packaging backplate (3) are provided with regulation hole (31), its characterized in that:

the floating compression assembly (4) comprises an adjusting piece (41), a conducting piece (42) and an elastic piece (43) arranged between the conducting piece (42) and the floating end plate (5), wherein the adjusting piece (41) is in threaded connection with the adjusting hole (31) of the packaging back plate (3), one end of the conducting piece (42) is abutted to the elastic piece (43), and the other end of the conducting piece (42) is abutted to the adjusting piece (41).

2. The fuel cell packaging structure according to claim 1, wherein the packaging back plate (3) is concavely provided with a guide groove (32), the adjusting hole (31) is communicated with the guide groove (32), and the conducting member (42) is slidably arranged in the guide groove (32).

3. The fuel cell packaging structure according to claim 1, wherein the elastic member (43) is a spring or a disc spring, the floating end plate (5) is provided with a protruding guide protrusion (411), the spring or the disc spring is sleeved on the guide protrusion (411), one end of the conductive member (42) close to the spring or the disc spring is provided with a slot, and a portion of the guide protrusion (411) is inserted into the slot.

4. The fuel cell packaging structure according to claim 1, wherein the packaging box comprises a packaging shell (1) and an anode end plate (2) which are detachably connected, and a containing cavity with two through ends is arranged in the packaging shell (1); the receiving cavity has a first port and a second port; the positive pole end plate (2) will first port is sealed, encapsulation backplate (3) can dismantle connect in encapsulation casing (1) and will the second port is sealed, pile up in galvanic pile (6) hold the intracavity, floating end plate (5) float and locate hold the intracavity, be used for compressing tightly galvanic pile (6).

5. The fuel cell packaging structure according to claim 4, further comprising a positioning rod (7), wherein a first limiting groove (412) is concavely formed in a side surface of the floating end plate (5), a second limiting groove (11) is concavely formed in an inner side wall of the packaging shell (1), the first limiting groove (412) and the second limiting groove (11) are enclosed to form a limiting space, one end of the positioning rod (7) is connected with the anode end plate (2), and the other end of the positioning rod (7) penetrates through the limiting space.

6. The fuel cell package structure according to claim 5, wherein the positioning rod (7) is provided in plurality, and the plurality of positioning rods (7) are provided at intervals in the circumferential direction along the inner side wall of the package case (1).

7. The fuel cell packaging structure according to claim 4, wherein a side wall of the packaging casing (1) is provided with a mounting port (12) communicated with the accommodating cavity, and the stack (6) can enter and exit the accommodating cavity from the mounting port (12).

8. The fuel cell packaging structure according to claim 7, further comprising a support plate (8), wherein opposite ends of the support plate (8) are respectively connected to the side walls of the mounting port (12).

9. The fuel cell packaging structure according to claim 7, further comprising a tie rod (9), wherein one end of the tie rod (9) is connected to the anode end plate (2), and the other end passes through the side wall of the mounting opening (12) and is connected to the packaging back plate (3).

10. The fuel cell packaging structure according to any one of claims 1 to 9, wherein the floating compression assemblies (4) are arranged at intervals in a plurality of groups.

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