CN219677298U - Fuel cell stack packaging structure - Google Patents

Abstract

The utility model belongs to the technical field of fuel cells, and discloses a fuel cell stack packaging structure which comprises a stack body, a first end plate, a second end plate and a plurality of connecting assemblies. The first end plate of coupling assembling connection and second end plate, a plurality of coupling assembling set up along the circumference interval of pile body, coupling assembling includes the head rod, the second connecting rod, the third connecting rod, the fourth connecting rod, first regulating block, second regulating block and elastic component, the head rod is used for connecting first end plate and first regulating block, the second connecting rod is used for connecting first end plate and second regulating block, the head rod is the contained angle setting with the second connecting rod, the third connecting rod is used for connecting second end plate and first regulating block, the fourth connecting rod is used for connecting second end plate and second regulating block, the third connecting rod is the contained angle setting with the fourth connecting rod, the elastic component is used for making and forms elastic connection between first regulating block and the second regulating block, in order to take up first end plate and second end plate.

Description

Fuel cell stack packaging structure

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a fuel cell stack packaging structure.

Background

A fuel cell is a device that directly converts chemical energy (hydrogen) and an oxidant (air or oxygen) in a fuel into usable electric energy through an internal electrochemical reaction. The power generation method is considered to have wide application prospect because of the characteristics of environmental protection, high efficiency, sustainability and no limitation of Carnot cycle in the working process.

Typical fuel cell structures generally include membrane electrode assemblies, bipolar plates, end plates, current collector plates, insulating plates, sealing rings, elastic elements, fasteners, and the like. The operating temperature of the fuel cell stack under the rated working condition can reach 80 ℃, the operating temperature of the fuel cell under different working conditions can change greatly, and the fuel cell can generate micro deformation in the length direction due to the thermal expansion and contraction effect, so that the packaging force of the stack is increased or reduced sharply, the tightness and the power generation performance of the stack are affected, and therefore, the stack packaging needs special size compensation design. Currently, existing fuel cell stacks typically employ screw or ribbon type stack packaging. In these two packaging modes, an end plate is generally disposed on one side of the pile body (including the membrane electrode assembly, the bipolar plate, the current collecting plate and the insulating plate), and the other side of the pile body generally adopts a structure of a floating end plate-elastic element-end plate to absorb shock and compensate pile length change caused by environmental change.

However, when the small-size and multi-group disc springs are adopted to dynamically adjust the packaging load of the galvanic pile, the uniformity of the force acting on the floating end plate cannot be ensured due to the processing errors of the disc springs, the springs and other elastic elements, and the floating end plate is generally made of high polymer materials due to the insulation requirement, so that the problems of insufficient rigidity and easy deformation exist under the action of uneven load, and the galvanic pile is damaged when serious, so that the safety of the system is affected. In addition, the side of the pile with the disc springs improves the design difficulty of large-size fluid conveying structures (an air inlet manifold, an air outlet manifold, a cooling liquid inlet manifold, a cooling liquid outlet manifold and the like) due to the influence of the positions and the sizes of the disc spring elements, and limits the application expansibility of a pile system.

Therefore, there is a need for a fuel cell stack package structure that solves the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a fuel cell stack packaging structure which ensures that the stress of a cell stack body is uniform, is convenient for the design of a large-size fluid conveying structure and improves the expansibility of the application of the fuel cell stack.

To achieve the purpose, the utility model adopts the following technical scheme:

a fuel cell stack package structure comprising:

a galvanic pile body;

a first end plate provided at a first end of the stack body;

a second end plate provided at a second end of the stack body;

the connecting assembly is connected with the first end plate and the second end plate, the connecting assembly is arranged along the circumferential interval of the electric pile body, the connecting assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a first adjusting block, a second adjusting block and an elastic piece, the first connecting rod is used for connecting the first end plate and the first adjusting block, the second connecting rod is used for connecting the first end plate and the second adjusting block, the first connecting rod and the second connecting rod are arranged in an included angle mode, the third connecting rod is used for connecting the second end plate and the first adjusting block, the fourth connecting rod is used for connecting the second end plate and the second adjusting block, the third connecting rod and the fourth connecting rod are arranged in an included angle mode, the elastic piece is used for enabling the first adjusting block and the second adjusting block to form elastic connection so as to tighten the first end plate and the second end plate, and the first end plate is close to or far away from the first end plate and the second end plate.

Preferably, one end of the first connecting rod is rotationally connected with the first end plate, the other end of the first connecting rod is rotationally connected with the first adjusting block, one end of the second connecting rod is rotationally connected with the first end plate, the other end of the second connecting rod is rotationally connected with the second adjusting block, one end of the third connecting rod is rotationally connected with the second end plate, the other end of the third connecting rod is rotationally connected with the first adjusting block, one end of the fourth connecting rod is rotationally connected with the second end plate, the other end of the fourth connecting rod is rotationally connected with the second adjusting block, the rotation axis between the first connecting rod and the first adjusting block, the rotation axis between the second connecting rod and the first end plate, the rotation axis between the second connecting rod and the second adjusting block, the rotation axis between the third connecting rod and the second end plate, the rotation axis between the third connecting rod and the first adjusting block, the rotation axis between the fourth connecting rod and the second end plate and the rotation axis between the fourth connecting rod and the second adjusting block are all parallel.

Preferably, the first adjusting block is provided with a first guide post, the second adjusting block is provided with a second guide post, the first guide post and the second guide post are coaxially arranged, the elastic piece is clamped between the first adjusting block and the second adjusting block, one end of the elastic piece is sleeved on the first guide post, the other end of the elastic piece is sleeved on the second guide post, the distance between the first connecting rod and the second connecting rod is gradually increased, the distance between the second end of the electric pile body and the first end of the electric pile body is gradually increased, and the distance between the third connecting rod and the fourth connecting rod is gradually increased.

Preferably, the first guide post is provided with a guide hole extending along the axial direction of the first guide post, and the second guide post can extend into the guide hole.

Preferably, the first adjusting block comprises a first connecting plate and a first adjusting plate, the first adjusting plate is fixedly arranged on one side, far away from the galvanic pile body, of the first connecting plate, the first connecting rod and the third connecting rod are both rotationally connected with the first connecting plate, and the first guide column is fixedly arranged on the first adjusting plate;

the second regulating block comprises a second connecting plate and a second regulating plate, the second regulating plate is fixedly arranged on one side, far away from the galvanic pile body, of the second connecting plate, the second connecting rod and the fourth connecting rod are both rotationally connected with the second connecting plate, and the second guide post is fixedly arranged on the second regulating plate.

Preferably, the connecting assembly further comprises a guide connecting piece, a first connecting hole is formed in the first adjusting block, a second connecting hole is formed in the second adjusting block, the second connecting hole and the first connecting hole are coaxially arranged, a first end of the guide connecting piece passes through the first connecting hole to be exposed to the first adjusting block, a second end of the guide connecting piece passes through the second connecting hole to be exposed to the second adjusting block, a first stop part is arranged on a part of the first end of the guide connecting piece, exposed to the first adjusting block, and a second stop part is arranged on a part of the second end of the guide connecting piece, exposed to the second adjusting block;

the connecting assembly comprises two elastic pieces, one of the two elastic pieces is sleeved at the first end of the guide connecting piece and clamped between the first stop part and the first adjusting block, and the other elastic piece is sleeved at the second end of the guide connecting piece and clamped between the second stop part and the second adjusting block;

the distance between the first connecting rod and the second connecting rod is gradually reduced from the first end of the pile body to the second end of the pile body, and the distance between the third connecting rod and the fourth connecting rod is gradually reduced from the second end of the pile body to the first end of the pile body.

Preferably, the guide connector includes:

the first end of the first connecting piece passes through the first connecting hole, and the first stopping part is arranged at the second end of the first connecting piece;

the first end of the second connecting piece penetrates through the second connecting hole and is connected with the first end of the first connecting piece, and the second stopping part is arranged at the second end of the second connecting piece.

Preferably, the first adjusting block comprises a third connecting plate and a third adjusting plate, the third adjusting plate is fixedly arranged on one side, far away from the galvanic pile body, of the third connecting plate, the first connecting rod and the third connecting rod are both rotationally connected with the third connecting plate, and the first connecting hole is formed in the third adjusting plate;

the second regulating block comprises a fourth connecting plate and a fourth regulating plate, the fourth regulating plate is fixedly arranged on one side, far away from the galvanic pile body, of the fourth connecting plate, the second connecting rod and the fourth connecting rod are both rotationally connected with the fourth connecting plate, and the second connecting hole is formed in the fourth regulating plate.

Preferably, the lengths of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are the same, and the structural dimensions of the first adjusting block and the second adjusting block are the same.

Preferably, the method further comprises:

a first current collecting plate disposed between the stack body and the first end plate;

a first insulating plate interposed between the first current collecting plate and the first end plate;

a second current collecting plate disposed between the stack body and the second end plate;

and the second insulating plate is clamped between the second current collecting plate and the second end plate.

The utility model has the beneficial effects that:

according to the fuel cell stack packaging structure, the first end plates and the second end plates at two ends of the electric stack body are connected through the plurality of connecting components, the first end plates and the second end plates are tensioned through the elasticity of the elastic pieces to realize packaging of the electric stack body, when the electric stack body expands, the first end plates are far away from the second end plates, when the electric stack body contracts, the first end plates are close to the second end plates, and when the first end plates are close to or far away from the second end plates, the first adjusting blocks are close to or far away from the second adjusting blocks, so that size compensation of the electric stack body is realized. Compared with the floating end plate in the prior art, the rigidity of the first end plate and the second end plate which are in contact with the pile body is higher, deformation is less likely to occur, and the flatness is better in the use process, so that the problem that the compression amount of each part of the pile body is inconsistent due to the deformation of the floating end plate is avoided, and the stress of the pile body is more uniform. And because the connecting component is arranged around the pile body, the design of the large-size fluid conveying structure can be facilitated, and the expansibility of the application of the fuel cell pile is improved.

Drawings

Fig. 1 is a schematic view of a fuel cell stack package structure according to a first embodiment of the present utility model;

fig. 2 is an exploded view of a fuel cell stack package structure according to a first embodiment of the present utility model;

fig. 3 is a schematic view of a part of a fuel cell stack package structure according to a first embodiment of the present utility model;

fig. 4 is a schematic diagram of a fuel cell stack package structure according to a second embodiment of the present utility model.

In the figure:

1. a galvanic pile body;

2. a first end plate;

3. a second end plate;

4. a connection assembly; 41. a first connecting rod; 42. a second connecting rod; 43. a third connecting rod; 44. a fourth connecting rod;

45. a first adjustment block; 451. a first guide post; 4511. a guide hole; 452. a first connection plate; 453. a first adjustment plate;

454. a third connecting plate; 455. a third adjusting plate;

46. a second adjustment block; 461. a second guide post; 462. a second connecting plate; 463. a second adjusting plate;

464. a fourth connecting plate; 465. a fourth adjusting plate;

47. an elastic member;

48. a guide connector; 481. a first stop portion; 482. a second stop portion;

49. a third connecting member;

5. a first current collecting plate;

6. a first insulating plate;

7. a second current collecting plate;

8. and a second insulating plate.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a fuel cell stack package structure including a stack body 1, a first end plate 2, a second end plate 3, and a plurality of connection members 4. The first end plate 2 is provided at a first end of the stack body 1. The second end plate 3 is provided at the second end of the stack body 1. The first end plate 2 and the second end plate 3 are connected to the connecting component 4, a plurality of connecting components 4 are arranged along the circumferential interval of the pile body 1, the connecting component 4 comprises a first connecting rod 41, a second connecting rod 42, a third connecting rod 43, a fourth connecting rod 44, a first adjusting block 45, a second adjusting block 46 and an elastic piece 47, the first connecting rod 41 is used for connecting the first end plate 2 with the first adjusting block 45, the second connecting rod 42 is used for connecting the first end plate 2 with the second adjusting block 46, the first connecting rod 41 and the second connecting rod 42 are arranged at an included angle, the third connecting rod 43 is used for connecting the second end plate 3 with the first adjusting block 45, the fourth connecting rod 44 is arranged at an included angle, when the first end plate 2 is close to or far from the second end plate 3, the first adjusting block 45 is close to or far from the second adjusting block 46, and the elastic piece 47 is used for enabling elastic connection to be formed between the first adjusting block 45 and the second adjusting block 46. In this embodiment, the elastic member 47 is a spring.

The fuel cell stack packaging structure provided in this embodiment connects the first end plate 2 and the second end plate 3 at two ends of the stack body 1 through the plurality of connection assemblies 4, and realizes packaging the stack body 1 through the tensioning of the elastic force of the elastic member 47 between the first end plate 2 and the second end plate 3, when the stack body 1 expands, the first end plate 2 is far away from the second end plate 3, when the stack body 1 contracts, the first end plate 2 is near to the second end plate 3, and when the first end plate 2 is near to or far away from the second end plate 3, the first adjusting block 45 is near to or far away from the second adjusting block 46, thereby realizing size compensation of the stack body 1. Compared with the fuel cell stack packaging structure adopting the floating end plate-elastic element-end plate, the fuel cell stack packaging structure in the embodiment has the advantages that the plurality of connecting assemblies 4 are arranged at intervals along the circumferential direction of the cell stack body 1, the tensile force of the plurality of connecting assemblies 4 integrally acts on the cell stack body 1 through the first end plate 2 and the second end plate 3, compared with the floating end plate in the prior art, the rigidity of the first end plate 2 and the second end plate 3 which are in contact with the cell stack body 1 in the embodiment is higher, the deformation is less prone to occurring, the flatness is better in the use process, and therefore the problem that the compression amount of each part of the cell stack body 1 is inconsistent due to the deformation of the floating end plate is avoided, and the stress of the cell stack body 1 is more uniform. And because the connecting component 4 is arranged around the pile body 1, the design of large-size fluid conveying structures (an air inlet manifold, an air outlet manifold, a cooling liquid inlet manifold, a cooling liquid outlet manifold and the like) can be facilitated, and the expansibility of the application of the fuel cell pile is improved. In addition, compared with the package structure adopting the floating end plate-elastic element-end plate, the package structure of the cell stack in the embodiment omits one floating end plate, thereby being beneficial to reducing the cost of the fuel cell stack.

Further, one end of the first connecting rod 41 is rotatably connected with the first end plate 2, the other end is rotatably connected with the first adjusting block 45, one end of the second connecting rod 42 is rotatably connected with the first end plate 2, the other end is rotatably connected with the second adjusting block 46, one end of the third connecting rod 43 is rotatably connected with the second end plate 3, the other end is rotatably connected with the first adjusting block 45, one end of the fourth connecting rod 44 is rotatably connected with the second end plate 3, the other end is rotatably connected with the second adjusting block 46, the rotation axis between the first connecting rod 41 and the first end plate 2, the rotation axis between the first connecting rod 41 and the first adjusting block 45, the rotation axis between the second connecting rod 42 and the first end plate 2, the rotation axis between the second connecting rod 42 and the second adjusting block 46, the rotation axis between the third connecting rod 43 and the second end plate 3, the rotation axis between the third connecting rod 43 and the first adjusting block 45, the rotation axis between the fourth connecting rod 44 and the second end plate 3, and the rotation axis between the fourth connecting rod 44 and the second adjusting block 46 are all arranged in parallel. The first end plate 2, the second end plate 3, the first connecting rod 41, the second connecting rod 42, the third connecting rod 43, the fourth connecting rod 44, the first adjusting block 45 and the second adjusting block 46 form a multi-link mechanism, so that the first end plate 2 and the second end plate 3 can be moved toward and away from each other.

Further, the connecting assembly 4 further includes a third connecting member 49, and third connecting holes are respectively formed at two ends of the first connecting rod 41, the second connecting rod 42, the third connecting rod 43 and the fourth connecting rod 44, the third connecting member 49 and the third connecting holes are arranged in one-to-one correspondence, and the third connecting member 49 passes through the third connecting holes to be connected to the first end plate 2, the second end plate 3, the first adjusting block 45 or the second adjusting block 46. The rotational connection between the first connecting rod 41 and the first end plate 2, between the first connecting rod 41 and the first adjusting block 45, between the second connecting rod 42 and the first end plate 2, between the second connecting rod 42 and the second adjusting block 46, between the third connecting rod 43 and the first end plate 2, between the third connecting rod 43 and the first adjusting block 45, between the fourth connecting rod 44 and the first end plate 2, and between the fourth connecting rod 44 and the second adjusting block 46 is achieved by means of a third connecting piece 49. In this embodiment, the third connecting member 49 is a pin, and the side surfaces of the first end plate 2 and the second end plate 3, the first connecting block 45, and the side of the second connecting block 46 away from the stack body 1 are each provided with a pin hole through which one end of the third connecting member 49 is inserted. Further, connecting rings are arranged at two ends of the first connecting rod 41, the second connecting rod 42, the third connecting rod 43 and the fourth connecting rod 44, the third connecting hole is an inner hole of the connecting ring, and the third connecting piece 49 is in clearance fit with the connecting ring, so that the connecting ring can rotate relative to the third connecting piece 49. The end of the third connecting piece 49 remote from the pin hole is provided with a third stop for preventing the connecting ring from coming out.

Optionally, the first adjusting block 45 is provided with a first guide column 451, the second adjusting block 46 is provided with a second guide column 461, the first guide column 451 and the second guide column 461 are coaxially arranged, the elastic member 47 is arranged between the first adjusting block 45 and the second adjusting block 46 in a clamping manner, one end of the elastic member is sleeved on the first guide column 451, the other end of the elastic member is sleeved on the second guide column 461, the distance between the first connecting rod 41 and the second connecting rod 42 is gradually increased from the first end of the galvanic pile body 1 to the second end of the galvanic pile body 1, and the distance between the third connecting rod 43 and the fourth connecting rod 44 is gradually increased from the second end of the galvanic pile body 1 to the first end of the galvanic pile body 1. The guiding and limiting of the elastic member 47 is achieved by the first guide post 451 and the second guide post 461. In the present embodiment, the axes of the first and second guide posts 451, 461 are disposed perpendicular to the stacking direction of the cell stack body 1. When the pile body 1 does not work, the elastic piece 47 is in a compressed state, the elastic force of the elastic piece 47 tightens the first end plate 2 and the second end plate 3 through the connecting component 4, when the pile body 1 expands, the first end plate 2 and the second end plate 3 are far away from each other, the first adjusting block 45 is close to the second adjusting block 46, and the elastic piece 47 is further compressed.

Alternatively, the first guide post 451 is provided with a guide hole 4511 extending in the axial direction of the first guide post 451, and the second guide post 461 can be inserted into the guide hole 4511. The diameter of the guide hole 4511 matches the diameter of the second guide post 461 so that the second guide post 461 can be inserted into the guide hole 4511. The second guide post 461 is inserted into the guide hole 4511 when the fuel cell is not operating. Further, the second guide post 461 has a stepped cylindrical structure, the diameter of the larger part of the diameter is the same as that of the first guide post 451, the diameter of the smaller part of the diameter is equal to or slightly smaller than that of the guide hole 4511, the larger part of the second guide post 461 plays a role in guiding the elastic member 47, the smaller part of the diameter is inserted into the guide hole 4511, the relative movement of the first adjusting block 45 and the second adjusting block 46 is guided, and the elastic member 47 is ensured not to be separated, so that the package of the fuel cell stack is firm and reliable, and the problem that the seal failure of the electric stack is caused by the radial movement of the elastic member in the package structure adopting the floating end plate-elastic member-end plate is avoided.

Optionally, the first adjusting block 45 includes a first connecting plate 452 and a first adjusting plate 453, the first adjusting plate 453 is fixedly arranged on one side of the first connecting plate 452 away from the galvanic pile body 1, the first connecting rod 41 and the third connecting rod 43 are both rotationally connected with the first connecting plate 452, and the first guiding column 451 is fixedly arranged on the first adjusting plate 453. The second adjusting block 46 includes a second connecting plate 462 and a second adjusting plate 463, the second adjusting plate 463 is fixedly arranged on one side of the second connecting plate 462 away from the galvanic pile body 1, the second connecting rod 42 and the fourth connecting rod 44 are both rotationally connected with the second connecting plate 462, and the second guiding post 461 is fixedly arranged on the second adjusting plate 463.

Optionally, the lengths of the first connecting rod 41, the second connecting rod 42, the third connecting rod 43 and the fourth connecting rod 44 are the same, and the structural dimensions of the first adjusting block 45 and the second adjusting block 46 are the same, so that the tensile force of the connecting assembly 4 on the first end plate 2 and the second end plate 3 is along the stacking direction of the galvanic pile body 1.

Optionally, the fuel cell stack package structure provided in the present embodiment further includes a first current collecting plate 5, a first insulating plate 6, a second current collecting plate 7, and a second insulating plate 8. The first current collecting plate 5 is disposed between the stack body 1 and the first end plate 2. The first insulating plate 6 is sandwiched between the first current collecting plate 5 and the first end plate 2. The second current collecting plate 7 is disposed between the stack body 1 and the second end plate 3. The second insulating plate 8 is sandwiched between the second current collecting plate 7 and the second end plate 3. The first insulating plate 6 is used for separating the first end plate 2 from the pile body 1, and the second insulating plate 8 is used for separating the second end plate 3 from the pile body 1, so that the pile body 1 is prevented from being short-circuited. Further, in this embodiment, each component of the connection assembly 4 is insulated, so as to ensure insulation between the connection assembly 4 and the pile body 1.

Alternatively, the angle between the first link 41 and the second link 42 and the angle between the third link 43 and the fourth link 44 are both smaller than 90 °. Since the lengths of the first link 41, the second link 42, the third link 43 and the fourth link 44 are equal in this embodiment, the included angle between the first link 41 and the second link 42 is equal to the included angle between the third link 43 and the fourth link 44, and the tension of the first link 41 on the first end plate 2, the tension of the second link 42 on the first end plate 2, the tension of the third link 43 on the second end plate 3 and the tension of the fourth link on the second end plate 3 are all equal. The smaller the included angle between the first connecting rod 41 and the second connecting rod 42 and the included angle between the third connecting rod 43 and the fourth connecting rod 44, the smaller the required elastic force of the elastic member 47 along the stacking direction of the electric pile body 1, compared with the compensation design of the floating end plate-elastic element-end plate in the prior art, the fuel cell stack packaging structure in the embodiment can effectively reduce the number of the elastic members 47 and further reduce the cost of the fuel cell stack by reducing the included angle between the first connecting rod 41 and the second connecting rod 42 and the included angle between the third connecting rod 43 and the fourth connecting rod 44.

Example two

As shown in fig. 4, the present embodiment provides a fuel cell stack package structure including a stack body 1, a first end plate 2, a second end plate 3, and a plurality of connection members 4. The connection assembly 4 includes a first connection rod 41, a second connection rod 42, a third connection rod 43, a fourth connection rod 44, a first adjustment block 45, a second adjustment block 46, and an elastic member 47. The fuel cell stack package structure provided in this embodiment is substantially the same as that in the first embodiment, except that the connection assembly 4 in this embodiment further includes a guide connection member 48, a first connection hole is provided on the first adjustment block 45, a second connection hole is provided on the second adjustment block 46, the second connection hole is coaxially provided with the first connection hole, a first end of the guide connection member 48 passes through the first connection hole and is exposed to the first adjustment block 45, a second end passes through the second connection hole and is exposed to the second adjustment block 46, a first stop portion 481 is provided on a portion of the first end of the guide connection member 48 exposed to the first adjustment block 45, and a second stop portion 482 is provided on a portion of the second end of the guide connection member 48 exposed to the second adjustment block 46. The connecting assembly 4 in this embodiment includes two elastic members 47, one of the two elastic members 47 is sleeved on the first end of the guiding connecting member 48 and is clamped between the first stop portion 481 and the first adjusting block 45, and the other elastic member is sleeved on the second end of the guiding connecting member 48 and is clamped between the second stop portion 482 and the second adjusting block 46. The distance between the first connecting rod 41 and the second connecting rod 42 gradually decreases from the first end of the stack body 1 to the second end of the stack body 1, and the distance between the third connecting rod 43 and the fourth connecting rod 44 gradually decreases from the second end of the stack body 1 to the first end of the stack body 1. In the fuel cell stack package structure in this embodiment, when the stack body 1 is not in operation, the two elastic members 47 in the connection assembly 4 are in a compressed state, the elastic force of the elastic members 47 tightens the first end plate 2 and the second end plate 3 through the connection assembly 4, and when the stack body 1 expands, the first adjustment block 45 and the second adjustment block 46 are away from each other, and the two elastic members 47 in the connection assembly 4 are further compressed.

Further, as shown in fig. 4, the guide connector 48 includes a first connector and a second connector. The first end of the first connecting member passes through the first connecting hole, and the first stop portion 481 is disposed at the second end of the first connecting member. The first end of the second connecting member passes through the second connecting hole and is connected with the first end of the first connecting member, and the second stop 482 is disposed at the second end of the second connecting member. In this embodiment, the first connecting piece is provided with an internal thread, the second connecting piece is provided with an external thread, and the first connecting piece and the second connecting piece are in threaded connection.

Alternatively, as shown in fig. 4, the first adjusting block 45 in the present embodiment includes a third connecting plate 454 and a third adjusting plate 455, the third adjusting plate 455 is fixedly disposed on a side of the third connecting plate 454 away from the stack body 1, the first connecting rod 41 and the third connecting rod 43 are both rotatably connected with the third connecting plate 454, and the first connecting hole is disposed on the third adjusting plate 455. The second adjusting block 46 includes a fourth connecting plate 464 and a fourth adjusting plate 465, the fourth adjusting plate 465 is fixedly disposed on one side of the fourth connecting plate 464 far away from the galvanic pile body 1, the second connecting rod 42 and the fourth connecting rod 44 are both rotatably connected with the fourth connecting plate 464, and the second connecting hole is disposed on the fourth adjusting plate 465.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A fuel cell stack package structure, characterized by comprising:

a galvanic pile body (1);

a first end plate (2) provided at a first end of the stack body (1);

a second end plate (3) provided at a second end of the stack body (1);

the connecting components (4) are connected with the first end plate (2) and the second end plate (3), the connecting components (4) are arranged along the circumferential interval of the galvanic pile body (1), the connecting components (4) comprise a first connecting rod (41), a second connecting rod (42), a third connecting rod (43), a fourth connecting rod (44), a first adjusting block (45), a second adjusting block (46) and an elastic piece (47), the first connecting rod (41) is used for connecting the first end plate (2) with the first adjusting block (45), the second connecting rod (42) is used for connecting the first end plate (2) with the second adjusting block (46), the first connecting rod (41) is arranged with the second connecting rod (42) in an included angle mode, the third connecting rod (43) is used for connecting the second end plate (3) with the first adjusting block (45), the fourth connecting rod (44) is used for connecting the second end plate (3) with the second adjusting block (46), the fourth connecting rod (44) is used for connecting the second adjusting block (46) with the second adjusting block (45) in an included angle mode, the fourth connecting rod (43) is arranged with the second connecting rod (45) is arranged with the elastic piece (47), to tighten the first end plate (2) and the second end plate (3), the first adjusting block (45) being closer to or farther from the second adjusting block (46) when the first end plate (2) is closer to or farther from the second end plate (3).

2. The fuel cell stack package structure according to claim 1, wherein the first connecting rod (41) has one end rotatably connected to the first end plate (2) and the other end rotatably connected to the first regulating block (45), the second connecting rod (42) has one end rotatably connected to the first end plate (2) and the other end rotatably connected to the second regulating block (46), the third connecting rod (43) has one end rotatably connected to the second end plate (3) and the other end rotatably connected to the first regulating block (45), the fourth connecting rod (44) has one end rotatably connected to the second end plate (3) and the other end rotatably connected to the second regulating block (46), a rotational axis between the first connecting rod (41) and the first end plate (2), a rotational axis between the first connecting rod (41) and the first regulating block (45), a rotational axis between the second connecting rod (42) and the first end plate (2), a rotational axis between the second connecting rod (42) and the second regulating block (45), a rotational axis between the second connecting rod (42) and the third connecting rod (43) and the rotational axis between the second connecting rod (42) and the first regulating block (45) The rotation axis between the fourth connecting rod (44) and the second end plate (3) and the rotation axis between the fourth connecting rod (44) and the second adjusting block (46) are arranged in parallel.

3. The fuel cell stack package structure according to claim 1, wherein a first guide post (451) is provided on the first adjusting block (45), a second guide post (461) is provided on the second adjusting block (46), the first guide post (451) and the second guide post (461) are coaxially provided, the elastic member (47) is sandwiched between the first adjusting block (45) and the second adjusting block (46), one end of the elastic member is sleeved on the first guide post (451), the other end of the elastic member is sleeved on the second guide post (461), the distance between the first connecting rod (41) and the second connecting rod (42) gradually increases from the first end of the electric stack body (1) to the second end of the electric stack body (1), and the distance between the third connecting rod (43) and the fourth connecting rod (44) gradually increases from the second end of the electric stack body (1).

4. A fuel cell stack package structure according to claim 3, wherein the first guide post (451) is provided with a guide hole (4511) extending in an axial direction of the first guide post (451), and the second guide post (461) is capable of protruding into the guide hole (4511).

5. A fuel cell stack packaging structure according to claim 3, wherein the first adjusting block (45) comprises a first connecting plate (452) and a first adjusting plate (453), the first adjusting plate (453) is fixedly arranged on one side of the first connecting plate (452) away from the stack body (1), the first connecting rod (41) and the third connecting rod (43) are both rotationally connected with the first connecting plate (452), and the first guide column (451) is fixedly arranged on the first adjusting plate (453);

the second regulating block (46) comprises a second connecting plate (462) and a second regulating plate (463), the second regulating plate (463) is fixedly arranged on one side, far away from the galvanic pile body (1), of the second connecting plate (462), the second connecting rod (42) and the fourth connecting rod (44) are both rotationally connected with the second connecting plate (462), and the second guide column (461) is fixedly arranged on the second regulating plate (463).

6. The fuel cell stack package structure according to claim 1, wherein the connection assembly (4) further includes a guide connection member (48), a first connection hole is provided on the first adjustment block (45), a second connection hole is provided on the second adjustment block (46), the second connection hole is coaxially provided with the first connection hole, a first end of the guide connection member (48) is exposed to the first adjustment block (45) through the first connection hole, a second end is exposed to the second adjustment block (46) through the second connection hole, a first stopper (481) is provided on a portion of the guide connection member (48) where the first end is exposed to the first adjustment block (45), and a second stopper (482) is provided on a portion of the guide connection member (48) where the second end is exposed to the second adjustment block (46);

the connecting assembly (4) comprises two elastic pieces (47), one of the two elastic pieces (47) is sleeved at the first end of the guide connecting piece (48) and clamped between the first stopping part (481) and the first adjusting block (45), and the other elastic piece is sleeved at the second end of the guide connecting piece (48) and clamped between the second stopping part (482) and the second adjusting block (46);

from the first end of pile body (1) to the second end of pile body (1), the distance between head rod (41) with second connecting rod (42) reduces gradually, from the second end of pile body (1) to the first end of pile body (1), the distance between third connecting rod (43) with fourth connecting rod (44) reduces gradually.

7. The fuel cell stack package structure according to claim 6, wherein the guide connection member (48) includes:

a first connecting piece, a first end of which passes through the first connecting hole, and the first stopping part (481) is arranged at a second end of the first connecting piece;

and the first end of the second connecting piece passes through the second connecting hole and is connected with the first end of the first connecting piece, and the second stopping part (482) is arranged at the second end of the second connecting piece.

8. The fuel cell stack package structure according to claim 6, wherein the first adjusting block (45) includes a third connecting plate (454) and a third adjusting plate (455), the third adjusting plate (455) is fixedly disposed on a side of the third connecting plate (454) away from the stack body (1), the first connecting rod (41) and the third connecting rod (43) are both rotationally connected with the third connecting plate (454), and the first connecting hole is disposed on the third adjusting plate (455);

the second adjusting block (46) comprises a fourth connecting plate (464) and a fourth adjusting plate (465), the fourth adjusting plate (465) is fixedly arranged on one side, far away from the pile body (1), of the fourth connecting plate (464), the second connecting rod (42) and the fourth connecting rod (44) are both rotationally connected with the fourth connecting plate (464), and the second connecting hole is formed in the fourth adjusting plate (465).

9. The fuel cell stack package structure according to claim 1, wherein the lengths of the first connecting rod (41), the second connecting rod (42), the third connecting rod (43), and the fourth connecting rod (44) are the same, and the structural dimensions of the first regulating block (45) and the second regulating block (46) are the same.

10. The fuel cell stack package according to any one of claims 1 to 9, further comprising:

a first current collecting plate (5) provided between the stack body (1) and the first end plate (2);

a first insulating plate (6) interposed between the first current collecting plate (5) and the first end plate (2);

a second current collecting plate (7) provided between the stack body (1) and the second end plate (3);

and a second insulating plate (8) interposed between the second current collecting plate (7) and the second end plate (3).