electrochemical cell stack

Abstract

The present invention discloses an electrochemical cell stack, comprising: a housing defining an installation space; a core disposed within the installation space; and at least one elastic structure disposed within the installation space and supported between an end of the core and the housing. Thus, by providing the elastic structure between the end of the core and the housing, the core does not need to be bolted to the housing, and tie rods are not required at either end of the core. This reduces the number of components in the electrochemical cell stack, helps lower the cost of the electrochemical cell stack, facilitates assembly of the electrochemical cell stack, and ensures good airtightness of the electrochemical cell stack, thereby ensuring the reliability of the electrochemical cell stack and extending its service life.

Description

Technical Field

[0001] The present invention relates to the field of electrochemical cell stack assemblies, including but not limited to fuel cell stack assemblies. Background Art

[0002] In the related art, an electrochemical cell stack (fuel cell stack) includes a core, end plates, and a shell. The core includes multiple units connected in series. Blind end plates (metal plates) are provided at both ends of the core of the electrochemical cell stack. The core and the shell of the electrochemical cell stack are connected by bolts. The core is compressed by tie rods provided at both ends. This arrangement results in a large number of parts in the electrochemical cell stack, which is not conducive to reducing the cost of the electrochemical cell stack and is not convenient for assembling the electrochemical cell stack. In addition, as the electrochemical cell stack is used for a longer time, the airtightness of the electrochemical cell stack will be poor, which will make the use of the electrochemical cell stack unreliable and the service life of the electrochemical cell stack short. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an electrochemical cell stack that can reduce the number of components in the electrochemical cell stack, thereby reducing the cost of the electrochemical cell stack, and can ensure good airtightness of the electrochemical cell stack, thereby extending the service life of the electrochemical cell stack.

[0004] The electrochemical cell stack according to the present invention comprises: a shell defining an installation space; a core disposed in the installation space; and at least one elastic structure disposed in the installation space and supported between an end of the core and the shell.

[0005] According to the electrochemical cell stack of the present invention, an elastic structure is provided between the end of the core and the outer shell, so that the core does not need to be connected to the outer shell by bolts, and a pull rod structure does not need to be provided at both ends of the core, thereby reducing the number of parts of the electrochemical cell stack, which is beneficial to reducing the cost of the electrochemical cell stack, facilitating the assembly of the electrochemical cell stack, and ensuring good airtightness of the electrochemical cell stack, thereby ensuring the reliability of the electrochemical cell stack and extending the service life of the electrochemical cell stack.

[0006] In some examples of the present invention, the electrochemical cell stack further includes a floating plate, wherein the floating plate is provided between the elastic structure and the stack core.

[0007] In some examples of the present invention, a mounting post is provided on a surface of the floating plate opposite to the elastic structure, and the elastic structure is sleeved on an outer side of the mounting post.

[0008] In some examples of the present invention, an inner surface of the housing is provided with an avoidance groove corresponding to the mounting post.

[0009] In some examples of the present invention, a first mounting groove is provided on a surface of the floating plate opposite to the elastic structure, and an end of the elastic structure opposite to the floating plate is mounted in the first mounting groove.

[0010] In some examples of the present invention, the first mounting groove is disposed around the mounting post.

[0011] In some examples of the present invention, a second mounting groove is provided on an inner surface of the housing opposite to the elastic structure, and an end portion of the elastic structure opposite to the housing is mounted in the second mounting groove.

[0012] In some examples of the present invention, the first mounting groove and the second mounting groove are opposite to each other.

[0013] In some examples of the present invention, the floating plate and the mounting post are integrally formed.

[0014] In some examples of the present invention, the elastic structure is configured as a spring;

[0015] In some examples of the present invention, the electrochemical cell stack further includes: a gas outlet end plate, the gas outlet end plate being provided at the open end of the outer shell, a pull rod being integrated between the outer shell and the gas outlet end plate, the pull rod being used to compress the core.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 is a schematic diagram of an electrochemical cell stack according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the connection between the gas port end plate and the housing according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] electrochemical cell stack 100;

[0022] Housing 10; installation space 11; flange structure 12; connector 13; avoidance groove 14; second installation groove 15; press-fit surface 16;

[0023] Core 20; Current collecting plate 21;

[0024] Elastic structure 30; disc spring 31;

[0025] Gas port end plate 40; through hole 41;

[0026] Floating plate 50 ; mounting column 51 ; first mounting slot 52 . DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] Reference below Figure 1 and Figure 2 An electrochemical cell stack 100 (fuel cell stack) according to an embodiment of the present invention is described.

[0029] like Figure 1 and Figure 2 As shown, an electrochemical cell stack 100 according to an embodiment of the present invention includes: a housing 10, a core 20, and at least one elastic structure 30. The housing 10 defines an installation space 11, the core 20 is disposed in the installation space 11, and the elastic structure 30 is disposed in the installation space 11, and the elastic structure 30 is supported between the end of the core 20 and the housing 10.

[0030] Among them, the shell 10 can be a shell 10 with one end open, the shell 10 defines an installation space 11, the core 20 is arranged in the installation space 11 defined by the shell 10, the elastic structure 30 is arranged in the installation space 11 defined by the shell 10, the elastic structure 30 is arranged between the end of the core 20 and the shell 10, the number of elastic structures 30 can be set to one, the number of elastic structures 30 can also be set to multiple, and the elastic structure 30 is always in a compressed state, that is, the elastic structure 30 always has a tendency to stretch toward both ends of the elastic structure 30.

[0031] In the prior art, blind end plates (metal plates) are provided at both ends of the core of the electrochemical cell stack. The core is connected to the shell of the electrochemical cell stack by bolts, and the core is compressed by tie rods provided at both ends. This arrangement will result in more parts in the electrochemical cell stack, which is not conducive to reducing the cost of the electrochemical cell stack and is not convenient for assembling the electrochemical cell stack.

[0032] In the present application, an elastic structure 30 in a compressed state is provided between the end of the core 20 and the outer shell 10, thereby eliminating the need to connect the core 20 to the outer shell 10 with bolts, and eliminating the need to provide a pull rod structure at both ends of the core 20 to compress the core 20. This arrangement can reduce the number of components of the electrochemical cell stack 100, is beneficial to reducing the cost of the electrochemical cell stack 100, can facilitate the assembly of the electrochemical cell stack 100, and can improve the space utilization of the electrochemical cell stack 100.

[0033] It is understood that as the electrochemical cell stack 100 ages, the core 20 will undergo plastic deformation. After the core 20 undergoes plastic deformation, the height of the core 20 will decrease, causing the core 20 to become loose, resulting in poor airtightness of the core 20, unreliable use of the electrochemical cell stack 100, and a shorter service life of the electrochemical cell stack 100. By providing the elastic structure 30 in a compressed state, the elastic structure 30 applies pressure to the core 20, thereby preventing the core 20 from becoming loose after plastic deformation. It can also be understood that the elastic structure 30 applies pressure to the core 20, ensuring that the core 20 is well stressed and compacted after plastic deformation. This ensures good airtightness of the electrochemical cell stack 100, prevents gas leakage, improves the durability of the core 20, and ensures the reliability of the electrochemical cell stack 100.

[0034] Therefore, by setting an elastic structure 30 between the end of the core 20 and the outer shell 10, the core 20 does not need to be connected to the outer shell 10 by bolts, and there is no need to set a pull rod structure at both ends of the core 20, thereby reducing the number of parts of the electrochemical cell stack 100, which is beneficial to reducing the cost of the electrochemical cell stack 100, facilitating the assembly of the electrochemical cell stack 100, and ensuring good airtightness of the electrochemical cell stack 100, thereby ensuring the reliability of the use of the electrochemical cell stack 100 and extending the service life of the electrochemical cell stack 100.

[0035] Optionally, the electrochemical battery stack 100 can be set on a vehicle, which can be a new energy vehicle. The new energy vehicle will generate vibrations during driving, and the vibrations will be transmitted to the electrochemical battery stack 100. The elastic structure 30 can absorb the vibrations to avoid affecting the working performance and working life of the electrochemical battery stack 100 due to the vibrations. Moreover, when the electrochemical battery stack 100 collides, the elastic structure 30 can play a buffering role to avoid a violent impact between the core 20 and the outer shell 10 or other components, thereby avoiding dangerous situations such as explosion of the electrochemical battery stack 100.

[0036] In some embodiments of the present invention, Figure 1and Figure 2 As shown, the electrochemical cell stack 100 may further include a gas port end plate 40, which may be disposed at the open end of the housing 10. Specifically, the open end of the housing 10 may be provided with a flange structure 12, which may be sleeved on the outer side of the housing 10. The flange structure 12 may be integrally formed with the housing 10, and the end of the gas port end plate 40 adjacent to the housing 10 may be in abutment contact with the flange structure 12.

[0037] Alternatively, as Figure 2 As shown, the air port end plate 40 and the flange structure 12 can be connected by a connector 13 to close the open end of the housing 10. Optionally, the air port end plate 40 and the flange structure 12 can be provided with corresponding connecting holes, and the connector 13 can cooperate with the connecting holes to fixedly connect the air port end plate 40 and the flange structure 12.

[0038] Optionally, the number of connection holes can be set to multiple. When the cross-section of the flange structure 12 is rectangular, the multiple connection holes can be arranged at intervals along the edge of the rectangle. When the cross-section of the flange structure 12 is circular, the multiple connection holes can be arranged at intervals in the circumferential direction of the circle. The multiple connecting parts 13 can respectively cooperate with the multiple connection holes to fix the gas port end plate 40 and the flange structure 12. This arrangement can maintain the pressing force of the core 20, and can ensure the firmness of the connection between the gas port end plate 40 and the outer shell 10, and can avoid the separation of the gas port end plate 40 and the outer shell 10.

[0039] Furthermore, a sealing structure can be sandwiched between the air vent end plate 40 and the flange structure 12, and the shape of the sealing structure can be adapted to the flange structure 12. For example, when the cross-section of the flange structure 12 is rectangular, the cross-section of the sealing structure can also be rectangular. When the cross-section of the flange structure 12 is circular, the cross-section of the sealing structure can also be circular. Such an arrangement can ensure that the sealing structure can play a good sealing role, and can prevent water vapor, dust, etc. from entering the installation space 11 through the gap between the air vent end plate 40 and the flange structure 12, thereby ensuring the safety of the electrochemical cell stack 100.

[0040] Furthermore, the connector 13 can be inserted into the connection hole from the end of the gas port end plate 40 away from the flange structure 12. Of course, the connector 13 can also be inserted into the connection hole from the end of the flange structure 12 away from the gas port end plate 40. It is understood that when the connector 13 is inserted into the connection hole from the end of the gas port end plate 40 away from the housing 10, the connection hole on the flange structure 12 can be a blind hole. When the connector 13 is inserted into the connection hole from the end of the flange structure 12 away from the gas port end plate 40, the connection hole on the gas port end plate 40 can be a blind hole. The connector 13 can be a countersunk bolt. Optionally, a rubber pad can be glued to the countersunk hole of the connection hole with waterproof glue. This arrangement can prevent the connector 13 from loosening.

[0041] Alternatively, as Figure 1 As shown, in the thickness direction of the gas port end plate 40, the gas port end plate 40 can be provided with a through hole 41, and the through hole 41 can penetrate the gas port end plate 40 in the thickness direction of the gas port end plate 40. The number of the through holes 41 can be set to multiple. When the electrochemical cell stack 100 is a hydrogen electrochemical cell stack 100, hydrogen and air can enter or exhaust the installation space 11 through the through hole 41.

[0042] In some embodiments of the present invention, Figure 1 As shown, the electrochemical cell stack 100 may further include a floating plate 50, which may be provided between the elastic structure 30 and the core 20. It should be noted that the floating plate 50 may be provided between the elastic structure 30 and the core 20. Optionally, current collecting plates 21 may be provided at both ends of the core 20. The floating plate 50 may be provided between the current collecting plates 21 and the elastic structure 30. The force generated by the elastic structure 30 may be applied to the core 20 via the floating plate 50. The floating plate 50 may evenly apply the force generated by the elastic structure 30 to the core 20. This arrangement can prevent the elastic structure 30 from damaging the core 20, and can evenly apply the force to the core 20, thereby increasing the service life of the core 20.

[0043] In some embodiments of the present invention, Figure 1 As shown, a mounting post 51 may be provided on the surface of the floating plate 50 opposite the elastic structure 30, and the elastic structure 30 may be sleeved around the mounting post 51. It should be noted that one end of the mounting post 51 may be connected to the floating plate 50, while the other end of the mounting post 51 may extend away from the core 20. The elastic structure 30 may be sleeved around the mounting post 51, guiding the elastic structure 30. This arrangement ensures that the elastic structure 30 can extend along the axial direction of the mounting post 51, thereby ensuring that the elastic structure 30 can reliably apply pressure to the core 20.

[0044] Optionally, the number of mounting posts 51 can be set to multiple, and the multiple mounting posts 51 can be arranged at intervals on the center line of the floating plate 50, or the multiple mounting posts 51 can be evenly spaced around the central axis of the floating plate 50. The outer side of each mounting post 51 can be provided with an elastic structure 30. Such an arrangement can further ensure the reliability of the electrochemical cell stack 100.

[0045] In some embodiments of the present invention, Figure 1As shown, the inner surface of the housing 10 may be provided with an avoidance groove 14 corresponding to the mounting post 51. It should be noted that the inner surface of the housing 10 may be provided with the avoidance groove 14, which may be formed by machining. The number of the avoidance grooves 14 may be the same as the number of the mounting posts 51. A plurality of avoidance grooves 14 may be provided in a one-to-one correspondence with a plurality of mounting posts 51. At least a portion of the structure of each mounting post 51 may be provided in the avoidance groove 14 corresponding thereto. This arrangement may reduce the volume of the mounting space 11 occupied by the mounting post 51, thereby allowing a larger core 20 to be arranged in the mounting space 11, thereby facilitating improved space utilization of the electrochemical cell stack 100 and improved power generation efficiency of the electrochemical cell stack 100.

[0046] In some embodiments of the present invention, Figure 1 As shown, a first mounting groove 52 may be provided on the surface of the floating plate 50 opposite the elastic structure 30, and an end portion of the elastic structure 30 opposite the floating plate 50 may be mounted in the first mounting groove 52. It should be noted that the first mounting groove 52 may be provided on the floating plate 50, and the first mounting groove 52 may be provided on the surface of the floating plate 50 opposite the elastic structure 30, and the first mounting groove 52 may be formed by machining.

[0047] The number of first mounting grooves 52 can be the same as the number of elastic structures 30. Multiple first mounting grooves 52 can be set in a one-to-one correspondence with multiple elastic structures 30. At least part of the structure of the elastic structure 30 can be installed in the corresponding first mounting groove 52. This arrangement can reduce the volume of the installation space 11 occupied by the elastic structure 30, thereby further improving the space utilization of the electrochemical cell stack 100.

[0048] In addition, the first mounting groove 52 can limit and guide the elastic structure 30. By providing the first mounting groove 52, the elastic structure 30 can be prevented from being displaced in its radial direction, thereby ensuring that the elastic structure 30 can reliably apply pressure to the core 20.

[0049] In some embodiments of the present invention, Figure 1 As shown, the first mounting groove 52 can be arranged around the mounting column 51, and it can also be understood that the mounting column 51 can be arranged in the first mounting groove 52. Optionally, the central axis of the first mounting groove 52, the central axis of the mounting column 51 and the central axis of the elastic structure 30 are arranged in a collinear manner. Such an arrangement can make the arrangement positions of the first mounting groove 52, the mounting column 51 and the elastic structure 30 reasonable, and can avoid eccentricity between the first mounting groove 52 and the mounting column 51, thereby avoiding eccentricity between the first mounting groove 52 and the elastic structure 30, and further enable the elastic structure 30 to be reliably supported between the end of the core 20 and the outer shell 10.

[0050] In some embodiments of the present invention, Figure 1 As shown, the inner surface of the housing 10 opposite to the elastic structure 30 may be provided with a second mounting groove 15, and the end of the elastic structure 30 opposite to the housing 10 may be installed in the second mounting groove 15. It should be explained that the housing 10 may be provided with a second mounting groove 15, and the second mounting groove 15 may be provided on the inner surface of the housing 10 opposite to the elastic structure 30. The second mounting groove 15 may be formed by machining. The number of second mounting grooves 15 provided may be the same as the number of elastic structures 30 provided. Multiple second mounting grooves 15 may be provided in a one-to-one correspondence with multiple elastic structures 30. At least part of the elastic structure 30 may be installed in the corresponding second mounting groove 15. Such an arrangement may further reduce the volume of the installation space 11 occupied by the elastic structure 30, thereby further improving the space utilization of the electrochemical cell stack 100.

[0051] In addition, the second mounting groove 15 can also limit and guide the elastic structure 30. By providing the second mounting groove 15, the elastic structure 30 can be prevented from being displaced in its radial direction, thereby ensuring that the elastic structure 30 can reliably apply pressure to the core 20.

[0052] In some embodiments of the present invention, Figure 1 As shown, the first mounting groove 52 and the second mounting groove 15 can be arranged relative to each other. It can be understood that the number of the first mounting grooves 52 can be the same as the number of the second mounting grooves 15, and the multiple first mounting grooves 52 can be arranged in a one-to-one correspondence with the multiple second mounting grooves 15, that is, in the thickness direction of the floating plate 50, the open ends of the multiple first mounting grooves 52 can be respectively arranged toward the multiple second mounting grooves 15, and the open ends of the multiple second mounting grooves 15 can also be respectively arranged toward the multiple first mounting grooves 52. Such an arrangement can make the arrangement of the first mounting grooves 52 and the second mounting grooves 15 reasonable, thereby ensuring that the elastic structure 30 can be reliably supported between the end of the core 20 and the outer shell 10.

[0053] In some embodiments of the present invention, the floating plate 50 and the mounting column 51 can be integrally formed, that is, the floating plate 50 and the mounting column 51 can be constructed as an integrally formed part. The integrally formed part has good structural strength. Such a setting can improve the connection reliability between the floating plate 50 and the mounting column 51 and prevent the floating plate 50 from separating from the mounting column 51.

[0054] Furthermore, by constructing the floating plate 50 and the mounting column 51 as an integrally formed part, the number of parts of the electrochemical cell stack 100 can be further reduced, thereby making it easier to assemble the electrochemical cell stack 100, improving the assembly efficiency of the electrochemical cell stack 100, and reducing the assembly time of the electrochemical cell stack 100, thereby facilitating an increase in the production of the electrochemical cell stack 100.

[0055] In some embodiments of the present invention, the elastic structure 30 can be constructed as a spring. Further, the elastic structure 30 can be constructed as a disc spring 31. It can be understood that the disc spring 31 has a variable stiffness characteristic. The disc spring 31 bears a larger load in a smaller space. The disc spring 31 has good buffering and vibration absorption capabilities, and the disc spring 31 has a longer service life. By constructing the elastic structure 30 as a disc spring 31, the reliability of the elastic structure 30 can be guaranteed, and the poor airtightness of the electrochemical cell stack 100 due to unreliable operation of the elastic structure 30 can be avoided.

[0056] In some embodiments of the present invention, a pull rod may be provided between the outer shell 10 and the gas port end plate 40, one end of the pull rod may be connected to the gas port end plate 40, and the other end of the pull rod may be connected to the outer shell 10. Specifically, the other end of the pull rod may be connected to the end of the outer shell 10 away from the gas port end plate 40. The pull rod may be integrated with the outer shell 10 and / or the gas port end plate 40. The pull rod may be used to compress the core 20 to improve the stress on the core 20 to ensure the airtightness of the electrochemical cell stack 100.

[0057] Optionally, the tie rod may be arranged in the installation space 11 , and the tie rod may be located outside the core 20 . This arrangement can avoid interference between the tie rod and the core 20 , thereby ensuring the safety of the electrochemical cell stack 100 .

[0058] Optionally, the number of tie rods can be multiple, and the multiple tie rods can be arranged at intervals in the length direction of the gas port end plate 40, or the multiple tie rods can be arranged at intervals in the circumferential direction of the gas port end plate 40. Of course, according to actual needs, the multiple tie rods can also be arranged in other ways. By setting multiple tie rods, the force on the core 20 can be uniform, thereby improving the service life of the core 20.

[0059] In some embodiments of the present invention, an insulating film may be installed within the housing 10. The assembly order of the electrochemical cell stack 100 is: gas port end plate 40 → current collecting plate 21 → stack core 20 → current collecting plate 21 → floating plate 50 → elastic structure 30 → housing 10 (this housing 10 is the housing 10 that has already been installed with the insulating film). After assembly, the electrochemical cell stack 100 may be press-fitted. This press-fitting method may be fixed-size press-fitting. Press-fitting is stopped when the housing 10 and the gas port end plate 40 are completely in contact. The housing 10 and the gas port end plate 40 may then be fixedly connected via the connector 13 to complete the press-fitting process of the electrochemical cell stack 100.

[0060] Alternatively, as Figure 1 As shown, the shell 10 has a pressing surface 16, which can be the end surface of the shell 10 away from the gas port end plate 40. By increasing the thickness of the shell 10 away from the gas port end plate 40, the deformation caused by the pressing force can be reduced, thereby improving the problem of unqualified airtightness of the electrochemical cell stack 100, and also improving the stress of each component, thereby improving the operating performance of the electrochemical cell stack 100.

[0061] Furthermore, if Figure 1 As shown, the thickness of the end of the shell 10 away from the gas port end plate 40 can be H1, and H1 can satisfy the relationship 30mm≤H1≤40mm. It can be understood that the thickness of the end of the shell 10 away from the gas port end plate 40 can be any value between 30mm and 40mm. This setting can make the thickness of the end of the shell 10 away from the gas port end plate 40 reasonable, thereby reducing the deformation caused by the pressing force, improving the problem of unqualified airtightness of the electrochemical cell stack 100, improving the force of each component, and thus improving the operating performance of the electrochemical cell stack 100.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0064] In the description of the present invention, "plurality" means two or more.

[0065] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0066] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0067] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An electrochemical cell stack (100), characterized in that include: A housing (10), wherein a mounting space (11) is defined within the housing (10); A core (20), the core (20) being disposed in the installation space (11); at least one elastic structure (30), the elastic structure (30) being disposed in the installation space (11) and supported between an end of the core (20) and the outer shell (10); A floating plate (50), the floating plate (50) being cushioned between the elastic structure (30) and the core (20); A mounting post (51) is provided on a surface of the floating plate (50) opposite to the elastic structure (30), and the elastic structure (30) is sleeved on the outside of the mounting post (51); There are a plurality of mounting columns (51), and the plurality of mounting columns (51) are evenly spaced around the central axis of the floating plate (50), and the elastic structure (30) is sleeved on the outer side of each mounting column (51); The inner surface of the housing (10) is provided with an avoidance groove (14) corresponding to the mounting column (51); the surface of the floating plate (50) opposite to the elastic structure (30) is provided with a first mounting groove (52); the end of the elastic structure (30) opposite to the floating plate (50) is mounted in the first mounting groove (52); and the floating plate (50) and the mounting column (51) are integrally formed.

2. The electrochemical cell stack (100) according to claim 1, characterized in that The first mounting groove (52) is arranged around the mounting column (51).

3. The electrochemical cell stack (100) according to claim 1, characterized in that A second mounting groove (15) is provided on the inner surface of the housing (10) opposite to the elastic structure (30), and an end portion of the elastic structure (30) opposite to the housing (10) is mounted in the second mounting groove (15).

4. The electrochemical cell stack (100) according to claim 3, characterized in that The first mounting groove (52) and the second mounting groove (15) are opposite to each other.

5. The electrochemical cell stack (100) according to any one of claims 1 to 4, characterized in that The elastic structure (30) is configured as a spring.

6. The electrochemical cell stack (100) according to any one of claims 1 to 4, characterized in that The electrochemical cell stack (100) further includes: a gas outlet end plate (40), the gas outlet end plate (40) being arranged at the open end of the outer shell (10), and a pull rod being integrated between the outer shell (10) and the gas outlet end plate (40), the pull rod being used to compress the stack core (20).

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