Package structure

Abstract

The utility model relates to the technical field of fuel cell stacks, and provides a packaging structure which is characterized in that a first end cover and a second end cover are arranged at an interval in a first direction; at least two strapping assemblies are arranged in the second direction at intervals, each strapping assembly comprises a strapping tape set and lock catches, the two lock catches are arranged in the third direction at intervals, each strapping tape set comprises a first strapping tape and a second strapping tape, the first strapping tape and the second strapping tape are connected through the lock catches, and the lock catches have the locking state and the unlocking state. The two lock catches are both in a locked state, and the strapping tape group enables the first end cover and the second end cover to have a movement trend of approaching each other in a first direction; every two adjacent lock catches in the second direction are connected through a balance rod. The first direction, the second direction and the third direction are perpendicular to one another. The relative position between the adjacent lock catches is corrected through the balance rod, and the dislocation of the strapping tape relative to the end cover is limited, so that the stability of the packaging structure for binding the fuel cell stack is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell stacks, and in particular to a packaging structure. Background Art

[0002] The fuel cell stack includes a plurality of single cells stacked in sequence along a first direction. During the product development stage, a packaging structure is required to bind and fix the fuel cell stack.

[0003] Generally, the packaging structure includes two end covers spaced apart in a first direction, the two end covers are connected by a strapping tape, and the strapping tape brings the two end covers close to each other along the first direction to clamp the fuel cell stack and prevent several single cells from being separated.

[0004] Since the fuel cell stack is prone to stack creep after running for a period of time or the fuel cell stack is deformed due to the dimensional tolerance of the bipolar plate, the force acting on the two end covers by the fuel cell stack is unevenly distributed, causing the pre-tightening force of the strapping strap to change, that is, the pre-tightening force of the strapping strap in some areas is larger and is in a tightened state, while the pre-tightening force of the strapping strap in other areas is relatively small and is relatively loose. When the strapping strap changes from a tightened state to a relaxed state, the strapping strap is prone to shift relative to the end cover. At this time, the force direction of the strapping strap on the end cover is also prone to deflection, causing a phase change in the end cover and even leading to further deformation of the fuel cell stack.

[0005] Therefore, a packaging structure is urgently needed to solve the above technical problems. Utility Model Content

[0006] The utility model aims to provide a packaging structure, which can limit the displacement of the strapping belt relative to the end cover, keep the force direction of the strapping belt on the end cover consistent, and thus maintain the reliability of the packaging structure binding the fuel cell stack.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A packaging structure for bundling a fuel cell stack, wherein the fuel cell stack comprises a plurality of single cells stacked in sequence along a first direction, and the packaging structure comprises:

[0009] The end caps include a first end cap and a second end cap spaced apart along the first direction;

[0010] A strapping assembly, wherein at least two groups of the strapping assembly are arranged at intervals along the second direction, each group of the strapping assembly comprises a strapping belt group and a lock buckle, two of the lock buckles are arranged at intervals in the third direction, the strapping belt group comprises a first strapping belt and a second strapping belt, the first strapping belt and the second strapping belt are connected by the lock buckle, the lock buckle comprises a locked state and an unlocked state, and when both of the lock buckles are in the locked state, the strapping belt group enables the first end cover and the second end cover to have a movement tendency to approach each other along the first direction;

[0011] A balance bar, wherein two adjacent lock buckles along the second direction are connected via the balance bar;

[0012] The first direction, the second direction and the third direction are perpendicular to each other.

[0013] As a preferred technical solution of the above-mentioned packaging structure, the above-mentioned first end cover and / or the above-mentioned second end cover are provided with an insertion hole, and the first and tail ports of the above-mentioned insertion hole are respectively formed on the opposite sides of the above-mentioned end cover in the above-mentioned third direction, and the above-mentioned first bundling strap and / or the above-mentioned second bundling strap are inserted into the above-mentioned insertion hole.

[0014] As a preferred technical solution of the packaging structure, along the first direction, the end of the first strapping belt and the end of the second strapping belt can be close to or away from each other and fixed by the lock.

[0015] As a preferred technical solution of the above-mentioned packaging structure, the above-mentioned lock includes a first locking piece and a second locking piece, and the above-mentioned first locking piece and the above-mentioned second locking piece can selectively move relative to each other along the above-mentioned first direction or lock each other, the above-mentioned first strapping belt is connected to the above-mentioned first locking piece, and the above-mentioned second strapping belt is connected to the above-mentioned second locking piece.

[0016] As a preferred technical solution of the packaging structure, the first locking member and the second locking member are both rod-shaped structures, and one axial end of the first locking member and one axial end of the second locking member are respectively connected to the strapping belt set;

[0017] The first locking member is provided with at least two first locking points along its axial direction, and the second locking member is provided with at least one second locking point, and the second locking point can be fixed with any of the first locking points.

[0018] As a preferred technical solution of the above-mentioned packaging structure, the above-mentioned first locking member is provided with a limiting groove along its axial direction, the above-mentioned first locking point is arranged on the side wall of the above-mentioned limiting groove, and the above-mentioned second locking member can be at least partially inserted into the above-mentioned limiting groove.

[0019] As a preferred technical solution of the above packaging structure, the above first locking point and the above second locking point are both hole-shaped structures, which are connected by fasteners or the above balance rod.

[0020] As a preferred technical solution for the above-mentioned packaging structure, it also includes a third end cover, which is located between the first end cover and the second end cover in the first direction, and the third end cover is connected to the first end cover or one of the second end covers through an elastic member, and the elastic member enables the third end cover to always have a movement tendency to be squeezed with the fuel cell stack along the first direction.

[0021] As a preferred technical solution of the above-mentioned packaging structure, the above-mentioned elastic member is arranged between the above-mentioned third end cover and the above-mentioned first end cover, at least two of the above-mentioned elastic members are arranged along the above-mentioned second direction and correspond one-to-one to the above-mentioned first strapping belts, and along the projection of the above-mentioned first direction, the above-mentioned elastic member is arranged opposite to the above-mentioned first strapping belt.

[0022] As a preferred technical solution of the above-mentioned packaging structure, it also includes a connecting component, the above-mentioned connecting component includes a connecting piece and a connecting shaft, the above-mentioned first strapping belt and / or the above-mentioned second strapping belt is provided with a connecting ring, the above-mentioned connecting shaft is provided with two, respectively penetrated through the above-mentioned connecting ring and the above-mentioned locking buckle along the above-mentioned second direction, the above-mentioned connecting sheet is provided with two intervals in the above-mentioned second direction, and the two above-mentioned connecting shafts are connected by the above-mentioned connecting sheet.

[0023] Beneficial effects of the utility model:

[0024] The same bundling assembly includes a first lock and a second lock symmetrically arranged in a third direction. After the packaging structure completes bundling the fuel cell stack, the fuel cell stack is located between the first end cover and the second end cover in the first direction, and between the first lock and the second lock in the third direction. When the first lock and the second lock are both in a locked state, the packaging structure is in a bundled state. At this time, the bundling belt is subjected to the tension of the first lock and the second lock, so that the bundling belt generates a pre-tightening force on the end cover, keeps the end cover against the fuel cell stack along the first direction, and then compresses a plurality of single cells. When the first lock and / or the second lock are in an unlocked state, the packaging structure is also in an unlocked state, and the first end cover and / or the second end cover cannot squeeze the fuel cell stack along the first direction. Each first strapping strap and / or second strapping strap is connected to the first lock and the second lock only at its head and tail ends, that is, the first lock, the first strapping strap, the second lock and the second strapping strap correspond to each other one by one, and the head and tail are connected to form a binding ring, and the axis of the binding ring is parallel to the second direction, so that the pre-tightening force applied by the strapping strap to the end cover is reduced to generate a component force in the second direction and / or the third direction, so that the first end cover and the second end cover clamp the fuel cell stack more stably. There are at least two balance bars, which are divided into a first balance bar and a second balance bar in the third direction. In the third direction, the first balance bar and the first lock are located on the same side of the fuel cell stack, the first balance bar is connected to the adjacent first lock, the second balance bar and the second lock are located on the same side of the fuel cell stack, and the second balance bar is connected to the adjacent second lock. In this way, the balance bar can always align adjacent lock buckles in the second direction, that is, at the same height in the first direction. In this way, the displacement of the strapping group relative to the end cover is limited, so that the strapping group only adjusts its own tensioning state, that is, only changes the force applied to the end cover without changing the direction of the force applied to the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the packaging structure provided by an embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of the structure of the packaging structure (excluding the end cover and the fuel cell stack) provided in an embodiment of the utility model;

[0028] Figure 3 It is an exploded schematic diagram of a lock buckle and a strapping belt assembly provided by an embodiment of the utility model;

[0029] Figure 4 It is a schematic diagram of the assembly of the first end cover and the third end cover provided in the embodiment of the utility model;

[0030] Figure 5 It is a schematic diagram of the structure of the first end cover and the second end cover provided in an embodiment of the utility model;

[0031] Figure 6 It is an exploded schematic diagram of a lock provided by an embodiment of the utility model;

[0032] Figure 7 It is a structural schematic diagram of a lock provided by an embodiment of the utility model.

[0033] In the figure:

[0034] X, first direction; Y, second direction; Z, third direction;

[0035] 100. Fuel cell stack;

[0036] 10. First end cover; 11. Insertion hole;

[0037] 20. Second end cover;

[0038] 30, lock buckle; 30a, first lock buckle; 30b, second lock buckle; 31, first locking member; 311, first locking point; 312, limiting groove; 32, second locking member; 321, second locking point;

[0039] 40. Strapping belt set; 40a. First strapping belt; 40b. Second strapping belt; 41. Connecting ring;

[0040] 50, balance pole; 50a, first balance pole; 50b, second balance pole;

[0041] 60. Fasteners;

[0042] 70. The third end cover;

[0043] 80. Elastic parts;

[0044] 90. Connecting assembly; 91. Connecting piece; 92. Connecting shaft. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] like Figures 1 to 7 As shown, the utility model provides a packaging structure for bundling a fuel cell stack 100, the fuel cell stack 100 includes a plurality of single cells stacked in sequence along a first direction X, and the packaging structure includes an end cap, a bundling assembly and a balance bar 50. Among them, the end cap includes a first end cap 10 and a second end cap 20 arranged at intervals along the first direction X; the bundling assembly is arranged at intervals along the second direction Y in at least two groups, each group of bundling assemblies includes a bundling belt group 40 and a lock 30, and two locks 30 are arranged at intervals in the third direction Z, the bundling belt group 40 includes a first bundling belt 40a and a second bundling belt 40b, the first bundling belt 40a and the second bundling belt 40b are connected by the lock 30, and the lock 30 includes a locked state and an unlocked state. When both locks 30 are in the locked state, the bundling belt group 40 enables the first end cap 10 and the second end cap 20 to have a movement tendency to approach each other along the first direction X; two locks 30 adjacent to each other along the second direction Y are connected by a balance bar 50; the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0050] The same bundling assembly includes a first lock buckle 30a and a second lock buckle 30b symmetrically arranged in the third direction Z. After the packaging structure completes bundling the fuel cell stack 100, the fuel cell stack 100 is located between the first end cover 10 and the second end cover 20 in the first direction X, and between the first lock buckle 30a and the second lock buckle 30b in the third direction Z. When the first lock buckle 30a and the second lock buckle 30b are both in a locked state, the packaging structure is in a bundled state. At this time, the bundling belt 40 is subjected to the tension of the first lock buckle 30a and the second lock buckle 30b, so that the bundling belt 40 generates a pre-tightening force on the end cover, keeps the end cover against the fuel cell stack 100 along the first direction X, and then compresses a plurality of single cells. When the first lock buckle 30a and / or the second lock buckle 30b are in an unlocked state, the packaging structure is also in an unlocked state, and the first end cover 10 and / or the second end cover 20 cannot squeeze the fuel cell stack 100 along the first direction X.

[0051] Specifically, each first strapping strap 40a and / or second strapping strap 40b is connected to the first lock buckle 30a and the second lock buckle 30b only at the head and tail ends thereof, that is, the first lock buckle 30a, the first strapping strap 40a, the second lock buckle 30b and the second strapping strap 40b correspond to each other one by one, and the head and tail are connected to form a binding ring, and the axis of the binding ring is parallel to the second direction Y. In this way, the pre-tightening force applied by the strapping strap 40 to the end cover is reduced to generate a component force in the second direction Y and / or the third direction Z, so that the first end cover 10 and the second end cover 20 clamp the fuel cell stack 100 more stably.

[0052] Furthermore, since the fuel cell stack 100 is prone to stack creep after running for a period of time or the fuel cell stack 100 is deformed due to dimensional tolerance problems of the bipolar plates, the force applied by the fuel cell stack 100 to the first end cover 10 and the second end cover 20 is unevenly distributed, causing the pre-tightening force of the strapping strap to change, that is, the pre-tightening force of the strapping strap in some areas is relatively large and is in a tightened state, while the pre-tightening force of the strapping strap in other areas is relatively small and is relatively loose. When the strapping strap changes from a tightened state to a relaxed state, the strapping strap is prone to shift relative to the end cover. At this time, the force direction of the strapping strap on the end cover is also prone to deflection, causing a phase change in the end cover, and even leading to further deformation of the fuel cell stack 100.

[0053] To this end, the utility model further provides a balance bar 50, which is used to connect the adjacent lock buckles 30 along the second direction Y. Specifically, at least two balance bars 50 are provided, which are divided into a first balance bar 50a and a second balance bar 50b in the third direction Z. In the third direction Z, the first balance bar 50a and the first lock buckle 30a are located on the same side of the fuel cell stack 100, the first balance bar 50a connects the adjacent first lock buckle 30a, the second balance bar 50b and the second lock buckle 30b are located on the same side of the fuel cell stack 100, and the second balance bar 50b connects the adjacent second lock buckle 30b. In this way, the balance bar 50 can always align the adjacent lock buckles 30 in the second direction Y, that is, at the same height in the first direction X. In this way, the displacement of the strapping group 40 relative to the end cover is limited, so that the strapping group 40 only adjusts its own tension state, that is, only changes the force applied to the end cover, but does not change the force applied to the end cover.

[0054] In this embodiment, all the first lock buckles 30a are connected through the same first balance pole 50a. In other embodiments, a plurality of first balance poles 50a are provided, each first balance pole 50a is only connected to part of the first lock buckles 30a, and two adjacent first balance poles 50a are connected through at least one first lock buckle 30a.

[0055] Optionally, the first end cover 10 and / or the second end cover 20 is provided with an insertion hole 11, the first and rear ends of the insertion hole 11 are respectively formed on opposite sides of the end cover in the third direction Z, and the first strapping belt 40a and / or the second strapping belt 40b is inserted into the insertion hole 11.

[0056] Since the strapping group 40 is always in a tensioned state in the binding state, when it is damaged, the damaged area will expand rapidly under the action of the pre-tightening force, causing the first strapping group 40a and / or the second strapping group 40b to break. To this end, in this embodiment, by inserting the first strapping group 40a and / or the second strapping group 40b into the insertion hole 11, it is convenient to implement the strapping group 40 to apply a pre-tightening force to the end cover pointing to the side of the fuel cell stack 100, and the end cover can also provide protection for the strapping group 40, reduce the exposed area of ​​the strapping group 40, and avoid the strapping group 40 from being damaged or broken due to wear and weathering corrosion. The insertion hole 11 can also limit the strapping group 40 from being displaced from the end cover in the radial direction of the insertion hole 11.

[0057] In other embodiments, the first end cover 10 and / or the second end cover 20 is provided with a placement groove on a side facing away from the fuel cell stack 100 , and the first bundling strap 40 a and / or the second bundling strap 40 b is buried in the placement groove.

[0058] Optionally, along the first direction X, the end of the first strapping belt 40 a and the end of the second strapping belt 40 b can be moved closer to or farther from each other and fixed by the buckle 30 .

[0059] Specifically, in this embodiment, the lock buckle 30 includes a first locking member 31 and a second locking member 32. The first locking member 31 and the second locking member 32 can selectively move relative to each other along the first direction X or lock each other. The first strapping belt 40a is connected to the first locking member 31, and the second strapping belt 40b is connected to the second locking member 32.

[0060] In this way, by changing the relative positions of the first locking member 31 and the second locking member 32 in the first direction X, the extension length of the lock 30 in the first direction X is adjusted, and thus it is applicable to the fuel cell stack 100 with different thickness dimensions in the first direction X. That is, when in use, firstly select the relative positions of the first locking member 31 and the second locking member 32 according to the thickness dimension of the fuel cell stack 100 in the first direction X and lock them. At this time, the strapping group 40 is in a tight state and can give a pre-tightening force to the first end cover 10 and the second end cover 20, so that the two end covers are pressed toward one side of the fuel cell stack 100.

[0061] Optionally, the first locking member 31 and the second locking member 32 are both rod-shaped structures, and one axial end of the first locking member 31 and one axial end of the second locking member 32 are respectively connected to the strapping belt group 40; the first locking member 31 has at least two first locking points 311 opened along its axial direction, and the second locking member 32 is provided with at least one second locking point 321, and the second locking point 321 can be fixed to any first locking point 311.

[0062] Specifically, in this embodiment, the first locking point 311 and the second locking point 321 are both hole-shaped structures, which are connected by the fastener 60 or the balance rod 50 .

[0063] For the convenience of description, the first locking member 31 is recorded as a first support rod, the second locking member 32 is recorded as a second support rod, the first locking point 311 is recorded as a first positioning hole, and the second locking point 321 is recorded as a second positioning hole.

[0064] It should be noted that, in this embodiment, when the packaging structure completes bundling the fuel cell stack 100 , the length direction of the first locking member 31 and the second locking member 32 is parallel to the first direction X. In other embodiments, the length direction of the first locking member 31 and the second locking member 32 intersects with the first direction X.

[0065] In the same first lock buckle 30a or second lock buckle 30b, the first support rod is provided with n first positioning holes along the first direction X, and the second support rod is provided with m second positioning holes along the first direction X, satisfying m≥1, n≥1.

[0066] When the number of the second positioning holes opened is m=1 and the number of the first positioning holes opened is n=1, after the second positioning holes are coaxially aligned with the first positioning holes along the second direction Y, the fastener 60 or the balance bar 50 is inserted into the second positioning holes and the first positioning holes to lock the relative positions of the first support rod and the second support rod. In this way, the lock buckle 30 only has a locked state and an unlocked state. When in the locked state, the first end cover 10 and the second end cover 20 can clamp the battery stack located in the middle. When in the unlocked state, the first end cover 10 and the second end cover 20 can move relatively independently to release the binding of the battery stack.

[0067] When the number of second positioning holes m=1 and the number of first positioning holes n>1, for ease of expression, the number of first positioning holes n=3, which are recorded as the first positioning holes a, b and c gradually away from the second end cover 20 along the length direction of the second support rod.

[0068] The second positioning hole is coaxially aligned with any one of the three first positioning holes along the second direction Y, and is penetrated through the second positioning hole and the selected first positioning hole by a fastener 60 or a balance bar 50 to lock the relative positions of the first support rod and the second support rod. In this way, the lock buckle 30 not only has a locked state and an unlocked state, but also includes an adjustment state. According to the length of the battery stack in the first direction X, the first positioning holes located at different positions in the first direction X are selected to be aligned and locked with the second positioning holes, that is, the second positioning hole is selected to be aligned and locked with the first positioning hole a, and the spacing between the first end cover 10 and the second end cover 20 in the first direction X is the smallest, and the second positioning hole is aligned and locked with the first positioning hole c, and the spacing between the first end cover 10 and the second end cover 20 in the first direction X is the largest.

[0069] When the number of second positioning holes m>1 and the number of first positioning holes n>1, for the sake of convenience, the number of second positioning holes m=2, denoted as the second positioning hole a and the second positioning hole b, wherein the second positioning hole a is closer to the first end cover 10 than the second positioning hole b, and the number of first positioning holes n=3, denoted as the first positioning hole a, the first positioning hole b and the first positioning hole c gradually away from the second end cover 20 along the length direction of the second support rod.

[0070] When only one of the fastener 60 or the balance bar 50 is used as a locking member, any second positioning hole and any first positioning hole can be selected to be coaxially aligned along the second direction Y, wherein when the second positioning hole a is coaxially locked with the first positioning hole a, the distance between the first end cover 10 and the second end cover 20 in the first direction X is the smallest, and when the second positioning hole b is coaxially locked with the first positioning hole c, the distance between the first end cover 10 and the second end cover 20 in the first direction X is the largest. In this way, multiple positioning holes are provided on both the first support bar and the second support bar, further expanding the adjustable range of the distance between the first end cover 10 and the second end cover 20.

[0071] Furthermore, the distance between the second positioning hole a and the second positioning hole b is L1, and at least two groups of first positioning holes with a distance of L1 are formed on the second support rod, and one group includes two first positioning holes. Specifically, the distance between the first positioning hole b and the first positioning hole a and the first positioning hole b is L1. In this way, when the balance bar 50 connects the second positioning hole a and the first positioning hole c, the fastener 60 or another balance bar 50 can also be used to connect the second positioning hole b and the first positioning hole b; or when the balance bar 50 connects the second positioning hole a and the first positioning hole b, the fastener 60 or another balance bar 50 can also be used to connect the second positioning hole b and the first positioning hole c. By adding the fastener 60 or another balance bar 50, the force of the balance bar 50 in the same lock 30 can be shared.

[0072] Preferably, in this embodiment, the first support rod is provided with a plurality of first positioning holes equidistantly along its length direction, the second support rod is provided with a plurality of second positioning holes equidistantly along its length direction, and the spacing between two adjacent second positioning holes is equal to the spacing between two adjacent first positioning holes.

[0073] Preferably, in this embodiment, the fastener 60 and the balance rod 50 are both provided with threads, which can be threadedly connected with the nut.

[0074] In other embodiments, the balance pole 50 is connected to only one of the first support pole and the second support pole in the same set of locks 30, that is, the balance pole 50 is connected to the first support pole or the second support pole adjacent to each other in the second direction Y, and the first support pole and the second support pole in the same set of locks 30 are fixed by fasteners 60.

[0075] In other embodiments, the first locking point 311 is provided with a first hook, and the second locking point 321 is provided with a second hook, and the first hook and the second hook can be locked along the first direction X.

[0076] Optionally, the first locking member 31 is provided with a limiting groove 312 along its axial direction, the second locking point 321 is arranged on the side wall of the limiting groove 312, and the second locking member 32 can be at least partially inserted into the limiting groove 312. In this way, the plug-in arrangement of the first locking member 31 and the second locking member 32 makes it easier to align the first locking point 311 and the second locking point 321 when adjusting the relative positions of the first locking member 31 and the second locking member 32 in the first direction X.

[0077] Optionally, the packaging structure further includes a third end cover 70, which is located between the first end cover 10 and the second end cover 20 in the first direction X. The third end cover 70 is connected to one of the first end cover 10 or the second end cover 20 through an elastic member 80, and the elastic member 80 enables the third end cover 70 to always have a movement tendency to be squeezed with the fuel cell stack 100 along the first direction X. Specifically, in this embodiment, the elastic member 80 is a butterfly spring, and the two action ends of the elastic member 80, one of which abuts against the third end cover 70, and the other abuts against the first end cover 10 or the second end cover 20. When the lock 30 is in a locked state, generally, the elastic member 80 is in a force storage state. In order to restore the deformation, the elastic member 80 acts on the third end cover 70 to move toward the side where the fuel cell stack 100 is located, and keeps in close contact with the end face of the fuel cell stack 100 in the first direction X, so as to play a fine-tuning role.

[0078] Furthermore, the elastic member 80 is disposed between the third end cover 70 and the first end cover 10. At least two elastic members 80 are disposed along the second direction Y and correspond one to one with the first strapping belt 40a. In the projection along the first direction X, the elastic member 80 is disposed opposite to the first strapping belt 40a.

[0079] Optionally, the packaging structure further includes a connection component 90, the connection component 90 includes a connection piece 91 and a connection shaft 92, the first strapping belt 40a and / or the second strapping belt 40b are provided with a connection ring 41, two connection shafts 92 are provided, respectively penetrated in the connection ring 41 and the lock buckle 30 along the second direction Y, two connection pieces 91 are provided at intervals in the second direction Y, and the two connection shafts 92 are connected by the connection piece 91. Specifically, in this embodiment, the first locking member 31 is provided with a light hole along the second direction Y, after the connection shaft 92 is penetrated in the light hole, the middle part of the connection shaft 92 is located in the light hole, and the axial ends of the connection shaft 92 are exposed outside the light hole, one end of the connection piece 91 is sleeved on the connection shaft 92, and on the opposite side of the two connection pieces 91, the connection shaft 92 is inserted with a latch or is threadedly connected with a nut to prevent the connection piece 91 from withdrawing. The connecting assembly 90 is used to connect the first strapping band 40a and the first locking member 31, providing the two with the freedom to swing around the second direction Y, so that the first strapping band 40a and the first locking member 31 can be adaptively adjusted to adapt to the fuel cell stack 100 of different thicknesses in the first direction X.

[0080] In other embodiments, one of the first strapping strap 40a or the second strapping strap 40b is connected to the lock buckle 30, the lock buckle 30 has a protruding plug, and the other has a plug interface along its length direction. The lock buckle 30 connects the first strapping strap 40a and the second strapping strap 40b by plugging the plug into the plug interface.

[0081] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A packaging structure for bundling a fuel cell stack (100), wherein the fuel cell stack (100) comprises a plurality of single cells stacked in sequence along a first direction (X), characterized in that: The packaging structure comprises: An end cap, comprising a first end cap (10) and a second end cap (20) arranged at intervals along the first direction (X); A strapping assembly, wherein at least two groups of strapping assemblies are arranged at intervals along a second direction (Y), each group of strapping assemblies comprises a strapping belt group (40) and a lock buckle (30), two lock buckles (30) are arranged at intervals along a third direction (Z), the strapping belt group (40) comprises a first strapping belt (40a) and a second strapping belt (40b), the first strapping belt (40a) and the second strapping belt (40b) are connected via the lock buckle (30), the lock buckle (30) comprises a locked state and an unlocked state, and when both of the lock buckles (30) are in the locked state, the strapping belt group (40) enables the first end cover (10) and the second end cover (20) to have a movement tendency to approach each other along the first direction (X); A balance bar (50), wherein two adjacent lock buckles (30) along the second direction (Y) are connected via the balance bar (50); The first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

2. The packaging structure according to claim 1, characterized in that: The first end cover (10) and / or the second end cover (20) is provided with an insertion hole (11), the first and the second ends of the insertion hole (11) are respectively formed on opposite sides of the end cover in the third direction (Z), and the first binding belt (40a) and / or the second binding belt (40b) are inserted into the insertion hole (11).

3. The packaging structure according to claim 1, characterized in that: Along the first direction (X), the end of the first strapping belt (40a) and the end of the second strapping belt (40b) can approach or move away from each other and are fixed by the lock buckle (30).

4. The packaging structure according to claim 3, characterized in that: The lock buckle (30) comprises a first locking member (31) and a second locking member (32), wherein the first locking member (31) and the second locking member (32) are capable of selectively moving relative to each other along the first direction (X) or locking with each other, the first strapping belt (40a) is connected to the first locking member (31), and the second strapping belt (40b) is connected to the second locking member (32).

5. The packaging structure according to claim 4, characterized in that: The invention also comprises a connecting component (90), wherein the connecting component (90) comprises a connecting piece (91) and a connecting shaft (92); the first strapping belt (40a) and / or the second strapping belt (40b) is provided with a connecting ring (41); two connecting shafts (92) are provided, respectively passing through the connecting ring (41) and the locking buckle (30) along the second direction (Y); two connecting pieces (91) are provided at intervals in the second direction (Y); and the two connecting shafts (92) are connected via the connecting piece (91).

6. The packaging structure according to claim 4, characterized in that: The first locking member (31) and the second locking member (32) are both rod-shaped structures, and one axial end of the first locking member (31) and one axial end of the second locking member (32) are respectively connected to the strapping belt set (40); The first locking member (31) is provided with at least two first locking points (311) along its axial direction, and the second locking member (32) is provided with at least one second locking point (321), and the second locking point (321) can be fixed with any one of the first locking points (311).

7. The packaging structure according to claim 6, characterized in that: The first locking member (31) is provided with a limiting groove (312) along its axial direction, the first locking point (311) is arranged on a side wall of the limiting groove (312), and the second locking member (32) can be at least partially inserted into the limiting groove (312).

8. The packaging structure according to claim 6, characterized in that: The first locking point (311) and the second locking point (321) are both hole-shaped structures and are connected via a fastener (60) or the balance pole (50).

9. The packaging structure according to claim 1, characterized in that: The invention also includes a third end cover (70), wherein the third end cover (70) is located between the first end cover (10) and the second end cover (20) in the first direction (X), and the third end cover (70) is connected to one of the first end cover (10) and the second end cover (20) via an elastic member (80), and the elastic member (80) enables the third end cover (70) to always have a movement tendency to be squeezed with the fuel cell stack (100) along the first direction (X).

10. The packaging structure according to claim 9, characterized in that: The elastic member (80) is arranged between the third end cover (70) and the first end cover (10), and at least two elastic members (80) are arranged along the second direction (Y) and correspond one to one with the first strapping belt (40a), and along the projection of the first direction (X), the elastic member (80) is arranged opposite to the first strapping belt (40a).

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