CN220963420U - Cell stack assembly of fuel cell - Google Patents

Abstract

The utility model discloses a cell stack assembly of a fuel cell, which comprises: a cell stack body; the first platen and the second platen are opposite and spaced apart along a first direction; the pull rod assembly comprises a fixing seat, an elastic piece and a pull rod, wherein the fixing seat is located between the first pressing plate and the second pressing plate, one end of the pull rod is fixedly arranged on the second pressing plate, the other end of the pull rod stretches into the fixing seat, and the elastic piece is compressed between the fixing seat and the pull rod to drive the pull rod to move towards the first pressing plate along the first direction. Through first clamp plate, second clamp plate and pull rod subassembly cooperation, the elasticity of the elastic component in the pull rod subassembly can drive the pull rod and drive the second clamp plate and remove towards first clamp plate, is favorable to the pile main part to keep suitable compression, and the automatic compensation pile main part is because of ageing compression loss that causes, makes pile main part's compression load and rigidity keep at reasonable within range, and then improves fuel cell's leakproofness and conductivity.

Description

Cell stack assembly of fuel cell

Technical Field

The present utility model relates to the field of electrochemical cells, and more particularly to a cell stack assembly.

Background

In the related art, a compression assembly is used for compressing a cell stack of a fuel cell, the cell stack of the fuel cell needs to be reasonably compressed in the service life, and the cell stack of the fuel cell can generate compression loss due to the aging of components, so that the length of the cell stack is reduced, and the pressure applied to the cell stack is insufficient. The manner in which the stack is compressed using existing compression assemblies requires periodic inspection and tightening of the compression assemblies.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. It is therefore an object of the present utility model to provide a stack assembly for a fuel cell that automatically compensates for compression loss of a stack body due to aging, and maintains compression load and rigidity of the stack body within reasonable ranges.

A cell stack assembly according to an embodiment of the present utility model includes: a cell stack body; the first pressing plate and the second pressing plate are opposite and spaced along the first direction, and the cell stack main body is arranged between the first pressing plate and the second pressing plate; the pull rod assembly comprises a fixed seat, an elastic piece and a pull rod, wherein the fixed seat is positioned between the first pressing plate and the second pressing plate and is fixedly arranged on the first pressing plate, one end of the pull rod is fixedly arranged on the second pressing plate, the other end of the pull rod stretches into the fixed seat, the elastic piece is arranged in the fixed seat, and the elastic piece is configured to be compressed between the fixed seat and the pull rod to be suitable for driving the pull rod to move towards the first pressing plate along the first direction.

According to the cell stack assembly provided by the embodiment of the utility model, the first pressing plate, the second pressing plate and the pull rod assembly are matched, the elastic force of the elastic piece in the pull rod assembly can drive the pull rod to drive the second pressing plate to move towards the first pressing plate, so that the cell stack main body can be kept properly compressed, the compression loss of the cell stack main body caused by aging can be automatically compensated, the compression load and the rigidity of the cell stack main body can be kept in a reasonable range, and the tightness and the conductivity of the fuel cell can be further improved.

In some embodiments of the present utility model, the fixing base is annular to define an installation space, the pull rod includes a pull rod main body and a limiting plate, one end of the pull rod main body is fixedly arranged on the second pressing plate, the limiting plate is fixedly arranged at the other end of the pull rod main body and is located in the installation space, the fixing base has a first end wall along a first direction, the first end wall is located at one side of the limiting plate, which is close to the second pressing plate, and the elastic element is arranged between the limiting plate and the first end wall.

In some embodiments of the utility model, the tie rod body is disposed through the first end wall.

In some embodiments of the present utility model, the fixing seat further has a second end wall along the first direction, the second end wall is located at a side of the limiting plate near the first pressing plate, and a guide rod is connected between the first end wall and the second end wall, and the guide rod extends along the first direction and penetrates through the limiting plate.

In some embodiments of the present utility model, the guide rods are multiple, and the guide rods are all disposed through the limiting plate.

In some embodiments of the utility model, the elastic member is sleeved on the guide rod.

In some embodiments of the present utility model, the fixing base further has a connecting sidewall connected between the first end wall and the second end wall, the inner sidewall of the connecting sidewall has a limiting boss, the limiting boss is located on a side of the limiting plate, which is close to the second pressing plate, along the first direction, and the limiting boss is adapted to be in abutment with the limiting plate for limiting.

In some embodiments of the present utility model, the fixing base is connected to a fixing rod, and the fixing rod is fixedly arranged on the first pressing plate.

In some embodiments of the utility model, the tie rod assemblies are plural, with the plural tie rod assemblies disposed about the stack body.

In some embodiments of the present utility model, the plurality of elastic members are compressed between the fixing base and the pull rod.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a cell stack assembly according to an embodiment of the present utility model;

Fig. 2 is a schematic view of a pull rod assembly according to an embodiment of the present utility model.

Reference numerals:

A cell stack assembly 100;

A cell stack body 1;

A first platen 2; a second pressing plate 3;

Pull rod assembly 4

A fixing base 41;

A mounting space 411; a first end wall 412; a second end wall 413;

A connecting sidewall 414; limit boss 415;

An elastic member 42;

a pull rod 43;

A pull rod body 431; a limiting plate 432;

A guide bar 44;

A fixing rod 5.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.

A stack assembly 100 according to an embodiment of the present utility model is described below with reference to fig. 1-2.

As shown in fig. 1 and 2, a stack assembly 100 according to an embodiment of the present utility model includes: a cell stack body 1; a first pressing plate 2 and a second pressing plate 3, the first pressing plate 2 and the second pressing plate 3 being opposite and spaced apart in a first direction, the cell stack body 1 being provided between the first pressing plate 2 and the second pressing plate 3; the pull rod assembly 4, the pull rod assembly 4 includes fixing base 41, elastic component 42 and pull rod 43, and fixing base 41 is located between first clamp plate 2 and the second clamp plate 3 and sets firmly in first clamp plate 2, and the one end of pull rod 43 sets firmly in second clamp plate 3, and in the other end of pull rod 43 stretched into fixing base 41, elastic component 42 locates in the fixing base 41, and elastic component 42 is configured to compress between fixing base 41 and pull rod 43 in order to be suitable for driving pull rod 43 to remove along first direction towards first clamp plate 2.

The stack assembly 100 includes a stack body 1, a first pressing plate 2, and a second pressing plate 3, and the stack body 1 converts chemical energy into electrical energy, which is a body portion of a fuel cell. The first pressing plate 2 and the second pressing plate 3 are oppositely arranged along a first direction, namely, the X direction in fig. 1, the first pressing plate 2 and the second pressing plate 3 are arranged at intervals along the first direction so as to form an assembly space between the first pressing plate 2 and the second pressing plate 3, the cell stack main body 1 is arranged in the assembly space between the first pressing plate 2 and the second pressing plate 3, and the first pressing plate 2 and the second pressing plate 3 are clamped at two ends of the cell stack main body 1 along the first direction so as to realize the effect that the first pressing plate 2 and the second pressing plate 3 can compress the cell stack main body 1.

The cell stack assembly 100 may further include a tie rod assembly 4, where the tie rod assembly 4 further includes a fixing base 41, an elastic member 42, and a tie rod 43, the fixing base 41 is located between the first pressing plate 2 and the second pressing plate 3, and the fixing base 41 is fixedly connected to the first pressing plate 2, for example: the fixing base 41 may be fixedly connected to the first pressing plate 2 by welding, and the fixing base 41 may also be fixedly connected to the first pressing plate 2 by screwing, but the present utility model is not limited thereto, and the fixing base 41 may also be fixedly connected to the first pressing plate 2 by other means, so long as the fixing base 41 is fixedly connected to the first pressing plate 2. One end of the pull rod 43 is fixedly disposed on the second pressing plate 3, for example: one end of the pull rod 43 may be fixedly connected to the second pressing plate 3 by welding, and one end of the pull rod 43 may be fixedly connected to the second pressing plate 3 by screwing, but the present utility model is not limited thereto, and one end of the pull rod 43 may be fixedly connected to the second pressing plate 3 by other means, as long as one end of the pull rod 43 is fixedly connected to the second pressing plate 3. The other end of the pull rod 43 stretches into the fixed seat 41, the elastic piece 42 is arranged in the fixed seat 41, the elastic piece 42 is compressed between the fixed seat 41 and the pull rod 43, the elastic force of the elastic piece 42 can drive the pull rod 43 to drive the second pressing plate 3 to move towards the first pressing plate 2 along the first direction, the distance between the first pressing plate 2 and the second pressing plate 3 is reduced to compress the cell stack main body 1, the first pressing plate 2 and the second pressing plate 3 provide compression load for the cell stack main body 1, and the compression load and rigidity of the cell stack main body 1 are kept in a reasonable range. The elastic force of the elastic member 42 automatically compensates for compression loss of the stack body 1 due to aging, which is advantageous in that the stack body 1 continuously maintains a proper compression and stack length, thereby improving sealability and electrical conductivity of the fuel cell.

Specifically, the stack body 1 includes a plurality of fuel cells. Along the first direction, pile body 1 presss from both sides and locates between first clamp plate 2 and the second clamp plate 3, fixing base 41 sets firmly in first clamp plate 2, the one end of pull rod 43 sets firmly in second clamp plate 3, the other end of pull rod 43 stretches into in fixing base 41 and elastic component 42 compression is between fixing base 41 and pull rod 43, pile body 1 length reduces when pile body 1 causes the compression loss because of the part ageing, the elasticity of elastic component 42 is greater than pile body 1 to the holding power of first clamp plate 2 and second clamp plate 3, thereby the elasticity of elastic component 42 can drive pull rod 43 to drive second clamp plate 3 along first direction towards first clamp plate 2 removal, distance between first clamp plate 2 and the second clamp plate 3 reduces, pile body 1 is compressed in the compression load automatic compensation pile body 1 of pile body 1 because of ageing is favorable to pile body 1 continuously keeps suitable compression and stack length, and then improve fuel cell's leakproofness and conductivity.

Therefore, through the cooperation of the first pressing plate 2, the second pressing plate 3 and the pull rod assembly 4, the elastic force of the elastic piece 42 in the pull rod assembly 4 can drive the pull rod 43 to drive the second pressing plate 3 to move towards the first pressing plate 2, so that the cell stack main body 1 is favorable for keeping proper compression, compression loss of the cell stack main body 1 caused by aging is automatically compensated, compression load and rigidity of the cell stack main body 1 are kept in a reasonable range, and sealing performance and conductivity of a fuel cell are improved.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the fixing base 41 is annular to define an installation space 411, the pull rod 43 includes a pull rod main body 431 and a limiting plate 432, one end of the pull rod main body 431 is fixedly disposed on the second pressing plate 3, the limiting plate 432 is fixedly disposed on the other end of the pull rod main body 431 and is located in the installation space 411, the fixing base 41 has a first end wall 412 along a first direction, the first end wall 412 is located on a side of the limiting plate 432 adjacent to the second pressing plate 3, and the elastic member 42 is disposed between the limiting plate 432 and the first end wall 412.

The fixing seat 41 is annular, the annular fixing seat 41 can define an installation space 411, one end of the pull rod 43 extends into the installation space 411 of the fixing seat 41, the elastic member 42 is assembled in the installation space 411, and the elastic member 42 is compressed between the fixing seat 41 and the pull rod 43. The pull rod 43 may include a pull rod main body 431 and a limiting plate 432, where one end of the pull rod main body 431 is fixedly disposed on the second pressing plate 3, for example: one end of the pull rod body 431 may be fixedly connected to the second pressing plate 3 by welding, and one end of the pull rod body 431 may be fixedly connected to the second pressing plate 3 by screwing, but the present utility model is not limited thereto, and one end of the pull rod body 431 may be fixedly connected to the second pressing plate 3 by other means, as long as one end of the pull rod body 431 is fixedly connected to the second pressing plate 3. The limiting plate 432 is fixed to the other end of the pull rod body 431, for example: the limiting plate 432 may be fixedly connected to the other end of the pull rod body 431 by welding, and the limiting plate 432 may be fixedly connected to the other end of the pull rod body 431 by screwing, but the present utility model is not limited thereto, and the limiting plate 432 may be fixedly connected to the other end of the pull rod body 431 by other means as long as the limiting plate 432 is fixedly connected to the other end of the pull rod body 431. The limiting plate 432 is located in the installation space 411 of the fixing base 41. The fixing seat 41 has a first end wall 412 along the first direction, the first end wall 412 is located at one side of the limiting plate 432 close to the second pressing plate 3, and the elastic member 42 is compressed between the limiting plate 432 and the first end wall 412, so that the effect that the elastic member 42 drives the limiting plate 432 to drive the second pressing plate 3 to move towards the first pressing plate 2 is achieved, and further the stack main body 1 is facilitated to keep proper compression and stacking length, and sealing performance and conductivity of the fuel cell are improved.

In some embodiments of the present utility model, as shown in fig. 1 and 2, a drawbar body 431 is provided through the first end wall 412.

The first end wall 412 may be provided with a through hole, the pull rod main body 431 may be disposed through the through hole, the cross section of the pull rod main body 431 may be circular, and the shape of the through hole is corresponding to the through hole, but the utility model is not limited thereto, as long as the shape of the through hole is matched with the shape of the pull rod main body 431, the pull rod main body 431 is disposed through the first end wall 412, so that the limiting plate 432 is beneficial to driving the pull rod main body 431 to move in the first direction in the through hole of the first end wall 412, and further driving the second pressing plate 3 to move towards the first pressing plate 2 in the first direction, so as to reduce the distance between the first pressing plate 2 and the second pressing plate 3, compensate the compression loss caused by aging of the cell stack main body 1, and keep the compression load and rigidity of the cell stack main body 1 within reasonable ranges.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the fixing seat 41 further has a second end wall 413 along the first direction, the second end wall 413 is located on a side of the limiting plate 432 near the first pressing plate 2, a guide rod 44 is connected between the first end wall 412 and the second end wall 413, and the guide rod 44 extends along the first direction and penetrates through the limiting plate 432.

The fixing seat 41 further has a second end wall 413 along the first direction, the second end wall 413 is located at one side of the limiting plate 432 near the first pressing plate 2, and the first end wall 412 and the second end wall 413 are oppositely disposed and are respectively located at two sides of the fixing seat 41 along the first direction. The guide rod 44 is fixedly connected between the first end wall 412 and the second end wall 413, the guide rod 44 extends along the first direction and penetrates through the limiting plate 432, the guide rod 44 has a guide effect, in the installation space 411, the guide rod 44 mainly plays a guide effect on the limiting plate 432, when the elastic piece 42 drives the limiting plate 432 to move towards the first pressing plate 2, the limiting plate 432 can move relatively accurately along the first direction under the guide effect of the guide rod 44, and the risk of the second pressing plate 3 shifting caused by the angular deviation of the limiting plate 432 is reduced. Thereby reducing the risk of poor conduction of the cell stack main body 1 caused by uneven compression load, and further being beneficial to the working reliability of the cell stack main body 1.

In some embodiments of the present utility model, as shown in fig. 2, the guide rods 44 are plural, and the plural guide rods 44 are all disposed through the limiting plate 432.

The number of the guide rods 44 may be plural, and the number of the guide rods 44 may be 2, 3, 4 or more, and in the present application, the number of the guide rods 44 is 4, for example, the plurality of guide rods 44 are all disposed through the limiting plate 432, when one of the guide rods 44 breaks, the other guide rods 44 can continue to exert the guiding function, which is favorable for the guide rods 44 to reliably exert the guiding function, and the four guide rods 44 are symmetrically disposed at two sides of the pull rod main body 431, which can improve the working stability of the limiting plate 432, and further reduce the risk of angular offset of the limiting plate 432.

In some embodiments of the present utility model, as shown in fig. 2, the elastic member 42 is sleeved on the guide rod 44.

The elastic member 42 is sleeved on the guide rod 44, the guide rod 44 can play a supporting role on the elastic member 42 to a certain extent, so that the elasticity of the elastic member 42 is always kept in the first direction, the risk that the elastic member 42 is compressed and bent is reduced, the elastic members 42 are prevented from interfering with each other, the risk that the elastic member 42 fails due to the lack of support is reduced, the working reliability of the elastic member 42 is further improved, the limiting plate 432 can be continuously driven to drive the second pressing plate 3 to move towards the first pressing plate 2, the compression loss caused by aging of the cell stack main body 1 is compensated, the compression load and the rigidity are kept in a reasonable range, and the sealing performance and the electrical conductivity of the fuel cell are improved.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the fixing base 41 further has a connecting sidewall 414, the connecting sidewall 414 is connected between the first end wall 412 and the second end wall 413, the inner sidewall of the connecting sidewall 414 has a limiting boss 415, the limiting boss 415 is located on a side of the limiting plate 432 near the second pressing plate 3 along the first direction, and the limiting boss 415 is adapted to abut against the limiting plate 432 for limiting.

The fixing seat 41 further has two connecting side walls 414, the two connecting side walls 414 may be opposite to each other and spaced apart, the two connecting side walls 414 are connected between the first end wall 412 and the second end wall 413, and the two connecting side walls 414, the first end wall 412 and the second end wall 413 together form the annular fixing seat 41. The inside wall of connecting lateral wall 414 has spacing boss 415, along the first direction, and spacing boss 415 is located the one side that limiting plate 432 is close to second clamp plate 3, and spacing boss 415 is spacing with limiting plate 432 butt, can reduce limiting plate 432 towards the excessive compression elastic component 42 risk of second clamp plate 3 to reduce elastic component 42 inefficacy risk, and then be favorable to the operational reliability of elastic component 42.

In some embodiments of the present utility model, as shown in fig. 2, the fixing base 41 is connected to a fixing rod 5, and the fixing rod 5 is fixedly arranged on the first pressing plate 2.

The fixing base 41 is connected with a fixing rod 5, the fixing rod 5 is fixedly arranged between the second end wall 413 and the first pressing plate 2 of the fixing base 41, the fixing rod 5 can be fixedly connected between the second end wall 413 and the first pressing plate 2 in a welding mode, and can also be fixedly connected between the second end wall 413 and the first pressing plate 2 in a screwing mode, but the application is not limited to this, and the fixing rod 5 can also be fixedly connected between the second end wall 413 and the first pressing plate 2 in other modes, so long as the fixing rod 5 is fixedly arranged between the second end wall 413 and the first pressing plate 2. The fixing seat 41 is stably fixed on the first pressing plate 2 through the fixing rod 5, the damage risk of parts in the installation space 411 caused by displacement of the fixing seat 41 is reduced, the working reliability of the pull rod assembly 4 is improved, and the normal working of the fuel cell is facilitated.

In some embodiments of the present utility model, as shown in fig. 1, the tie rod assemblies 4 are plural, and the plurality of tie rod assemblies 4 are arranged around the stack body 1.

The application is described by taking the example that the number of the pull rod assemblies 4 is 8, and the plurality of the pull rod assemblies 4 are uniformly distributed around the cell stack main body 1, when one of the pull rod assemblies 4 fails, the other pull rod assemblies 4 can continuously drive the pull rod 43 to drive the second pressing plate 3 to move towards the first pressing plate 2, so that compression loss of the cell stack main body 1 caused by aging is automatically compensated, compression load and rigidity are kept in a reasonable range, further the reliability of the pull rod assemblies 4 is improved, and normal operation of a fuel cell is ensured.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the elastic members 42 may be plural, and the plural elastic members 42 are compressed between the fixing base 41 and the pull rod 43.

The number of the elastic members 42 may be plural, the plural elastic members 42 are compressed between the fixing seat 41 and the pull rod 43, and the number of the elastic members 42 may be 2, 4 or 6, and the application is described by taking the case that the number of the elastic members 42 is 4. When one of the elastic members 42 fails, the other elastic members 42 can continue to exert the driving function, which is beneficial to the elastic members 42 to reliably exert the driving function, and the four elastic members 42 are symmetrically arranged at two sides of the pull rod main body 431, so that the working stability of the limiting plate 432 can be improved, and the risk of angular offset of the limiting plate 432 can be reduced. The elastic force of the plurality of elastic members 42 automatically compensates for compression loss of the stack body 1 due to aging, which is advantageous in that the stack body 1 continuously maintains a proper compression and stack length, thereby further improving sealability and electrical conductivity of the fuel cell.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A stack assembly for a fuel cell, comprising:

a cell stack body;

A first pressure plate and a second pressure plate opposite and spaced apart in a first direction, the cell stack body being disposed between the first pressure plate and the second pressure plate;

the pull rod assembly comprises a fixed seat, an elastic piece and a pull rod, wherein the fixed seat is positioned between the first pressing plate and the second pressing plate and is fixedly arranged on the first pressing plate, one end of the pull rod is fixedly arranged on the second pressing plate, the other end of the pull rod stretches into the fixed seat, the elastic piece is arranged in the fixed seat, and the elastic piece is configured to be compressed between the fixed seat and the pull rod so as to be suitable for driving the pull rod to move towards the first pressing plate along the first direction.

2. The fuel cell stack assembly according to claim 1, wherein the fixing base is annular to define an installation space, the pull rod includes a pull rod body and a limiting plate, one end of the pull rod body is fixedly disposed on the second pressing plate, the limiting plate is fixedly disposed on the other end of the pull rod body and located in the installation space, the fixing base has a first end wall along the first direction, the first end wall is located on a side of the limiting plate, which is close to the second pressing plate, and the elastic member is disposed between the limiting plate and the first end wall.

3. The fuel cell stack assembly according to claim 2, wherein the tie rod body is provided through the first end wall.

4. The fuel cell stack assembly according to claim 2, wherein the fixing base further has a second end wall along the first direction, the second end wall is located at a side of the limiting plate near the first pressing plate, and a guide rod is connected between the first end wall and the second end wall, extends along the first direction and penetrates through the limiting plate.

5. The fuel cell stack assembly according to claim 4, wherein the guide rods are plural, and the guide rods are provided in plural in penetrating manner to the limiting plate.

6. The fuel cell stack assembly according to claim 4, wherein the elastic member is sleeved on the guide rod.

7. The fuel cell stack assembly of claim 4, wherein the mounting base further has a connecting sidewall connected between the first end wall and the second end wall, the connecting sidewall having a limiting boss on an inner sidewall thereof along the first direction, the limiting boss being located on a side of the limiting plate adjacent to the second pressure plate, the limiting boss being adapted to be limited in abutment with the limiting plate.

8. The fuel cell stack assembly according to claim 1, wherein the fixing base is connected with a fixing rod, and the fixing rod is fixedly arranged on the first pressing plate.

9. The fuel cell stack assembly according to any one of claims 1-8, wherein the tie rod assembly is a plurality of the tie rod assemblies disposed around the stack body.

10. The fuel cell stack assembly according to any one of claims 1 to 8, wherein the elastic members are plural, and the plural elastic members are compressed between the fixing base and the tie rod.