CN114388861A

CN114388861A - Fuel cell stack structure and fuel cell

Info

Publication number: CN114388861A
Application number: CN202011138632.6A
Authority: CN
Inventors: 亓峰; 张博特; 何难; 杨新春
Original assignee: Fuxin Dare Automotive Parts Co Ltd
Current assignee: Fuxin Dare Automotive Parts Co Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-04-22

Abstract

The application relates to the technical field of new energy, in particular to a fuel cell stack structure and a fuel cell. The fuel cell stack structure includes: at least one first sealing gasket, which is provided with at least one first combination part; at least one second sealing gasket, which is provided with at least one second combination part corresponding to the first combination part; and the electrode plate is positioned between the first sealing gasket and the second sealing gasket and is provided with at least one first through part corresponding to the first combination part, and the first combination part passes through the first through part to be combined with the second combination part so as to fix the electrode plate. This application realizes the location to the plate electrode through the seal gasket adjacent with the plate electrode, and at the pile stromatolite in-process, by the combination portion of insulating pad to the plate electrode location, need not to add outside or inside positioner, the pile equipment degree of difficulty is little, and the equipment precision is high, and the installation stroke is short, is difficult to cause the equipment difficulty.

Description

Fuel cell stack structure and fuel cell

Technical Field

The application relates to the technical field of new energy, in particular to a fuel cell stack structure and a fuel cell.

Background

The fuel cell stack assembly is a process of stacking electrode plates, insulating gaskets, membrane electrodes and other components one by one, each of which needs to meet accurate positioning tolerance, and for this reason, the stack stacking process generally adopts a positioning long pin or a method of positioning around the outer surface to ensure that the positioning tolerance is met.

For the method using the positioning long pin, after the positioning long pin is stacked to a certain height, due to the existence of the self verticality tolerance, the holes on the polar plates are difficult to be inserted in alignment, and after the stacking is finished, the polar plates are difficult to be pulled out. If the insulating material is adopted, the stack is not pulled out in the stacking process, and interference with the end plate of the stack can be caused in the final stacking process, and resistance can also be caused to the stacking process.

For the method of positioning the periphery of the outer surface, although the problem caused by long pin positioning is solved, the positioning is only carried out through the outer surface, and the position of the galvanic pile is deviated and deformed in the pile pressing process, particularly for a long pile, so that the pile assembling failure is caused because the galvanic pile is not limited in the pile assembling process.

Therefore, how to solve the positioning problem of the fuel cell stack stacking process becomes the direction of efforts of those skilled in the art.

Disclosure of Invention

The utility model provides a fuel cell pile structure and fuel cell, aim at solving the location problem of fuel cell pile process of piling, this application realizes the location to the plate electrode through the seal gasket adjacent with the plate electrode, at pile stromatolite in-process, the plate electrode location is fixed a position by the combination portion of insulating pad, need not to add outside or inside positioner, the pile equipment degree of difficulty is little, the equipment precision is high, compare with location long round pin location, pile the process in group, the portion of running through of every plate electrode only needs to fix a position with the first combination portion on the insulating pad, the installation stroke is short, be difficult to cause the equipment difficulty, after the equipment, need not to extract the locating pin, and the insulating pad can be along with pressing pile process and producing the displacement together, can not cause the risk of interfering with the end plate.

In a first aspect, the present application provides a fuel cell stack structure comprising:

at least one first sealing gasket, which is provided with at least one first combination part;

at least one second sealing gasket, which is provided with at least one second combination part corresponding to the first combination part; and

and the electrode plate is positioned between the first sealing gasket and the second sealing gasket and is provided with at least one first through part corresponding to the first combination part, and the first combination part passes through the first through part to be combined with the second combination part so as to fix the electrode plate.

In summary of the first aspect of the present application, in a first possible embodiment of the present application, the second combining part has a first space for accommodating the first combining part to move along a first direction, and the first direction is parallel to the electrode plate.

In a second possible embodiment of the present application, the second combining part has a second space for accommodating the first combining part to move along a second direction, which is a direction perpendicular to the electrode plates.

In a third possible embodiment of the present application, in combination with the first aspect of the present application, the first combining portion is a cylindrical protrusion, and the second combining portion is a cylindrical groove engaged with the cylindrical protrusion.

In a fourth possible embodiment of the present application, in combination with the first aspect of the present application, the first sealing gasket has a plurality of cylindrical protrusions disposed on a side facing the electrode plate and a side facing away from the electrode plate.

The second sealing gasket is provided with a plurality of cylindrical grooves which are arranged on one surface facing the electrode plate and one surface back to the electrode plate.

In a fifth possible embodiment of the present application, in combination with the first aspect of the present application, the first combination portion is a cylinder and the second combination portion is a through hole for fitting with the cylinder.

In a sixth possible embodiment of the present application, combining the first combining portion with the second combining portion is a matching block, and combining the first combining portion with the second combining portion is a matching opening.

In a seventh possible embodiment of the present application, in combination with the first aspect of the present application, the first sealing gasket further has a second combination portion, and the second sealing gasket further has a first combination portion.

In an eighth possible embodiment of the present application, in combination with the first aspect of the present application, the first combination portion and the second combination portion are respectively disposed along diagonal positions of the first sealing gasket.

In a second aspect, the present application provides a fuel cell comprising a fuel cell stack structure as in the first aspect.

This application realizes the location to the plate electrode through the seal gasket adjacent with the plate electrode, at pile stromatolite in-process, the plate electrode location is fixed a position by insulating spacers's combination portion, need not to add outside or inside positioner, the pile equipment degree of difficulty is little, the assembly precision is high, compare with the location long round pin location of location, pile the process in the group, the portion that runs through of every plate electrode only needs to fix a position with the first combination portion on the insulating spacers, the installation stroke is short, be difficult to cause the equipment difficulty, after the equipment, need not to extract the locating pin, and insulating spacers can be along with pressing the pile process and produce the displacement together, can not cause the risk of interfering with the end plate.

Compared with the mode of positioning the plane on the outer surface, the two sides of the electrode plate are clamped by the insulating gaskets on the two sides, so that internal support is provided for the galvanic pile which is not pressed, the relative position is kept in the process of pressing the galvanic pile, and the risk of deformation of the galvanic pile group is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a fuel cell stack structure provided in an embodiment of the present application;

FIG. 2 is a schematic view of a structure of a gasket seal provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a structure of an electrode plate provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a first combining part and a second combining part provided in the embodiment of the present application when combined;

fig. 5 is another schematic structural diagram of the first combined part and the second combined part provided in the embodiment of the present application when combined;

fig. 6 is another schematic structural diagram of the first combined part and the second combined part provided in the embodiment of the present application when combined;

fig. 7 is another schematic structural diagram of the first combined part and the second combined part provided in the embodiment of the present application when combined.

The sealing structure comprises a first sealing gasket 10, a first combined part 11, a cylindrical protrusion 111, a cylindrical column 112, a fitting block 113, an electrode plate 20, a first through part 21, a second sealing gasket 30, a second combined part 31, a cylindrical groove 311, a through hole 312, a fitting opening 313, a first space 41 and a second space 42.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The present embodiment provides a fuel cell stack structure and a fuel cell, which will be described in detail below.

Referring first to fig. 1, fig. 1 shows a schematic structural diagram of a fuel cell stack structure in an embodiment of the present application. The fuel cell stack structure includes:

at least one first sealing gasket 10, the first sealing gasket 10 having at least one first assembly 11;

the sealing gasket is an assembly for separating adjacent electrode plates 20 to form a seal around the electrode plates 20, and generally, the sealing gasket has an insulating property, and thus, may be called an insulating gasket. Illustratively, the material of the sealing gasket may be a plastic material, an insulating material, a non-conductive material, for example, silica gel, polyethylene, polystyrene, or the like. Specifically, referring to fig. 2, fig. 2 shows a schematic structural diagram of a gasket in the embodiment of the present application, since the gasket seals around the electrode plate 20, the gasket is formed in a generally rectangular frame shape, but is not limited thereto, for example, when the electrode plate 20 is in a regular hexagonal shape, the gasket may also be in a regular hexagonal frame shape, and for example, the shape of the gasket may also be different from the shape of the electrode plate 20.

The first gasket 10 is any one of gaskets in the fuel cell stack, and specifically, the first gasket 10 has at least one first assembly portion 11, wherein the first assembly portion 11 is used for passing through the electrode plate 20 to fix the electrode plate 20.

At least one second gasket 30, the second gasket 30 having at least one second assembly 31 corresponding to the first assembly 11;

the second gasket 30 is a gasket adjacent to the first gasket 10 in the fuel cell stack, so that the first gasket 10 and the second gasket 30 clamp the middle electrode plate 20 when the fuel cell stack is operated, and specifically, the second gasket 30 has at least one second combination portion 31 corresponding to the first combination portion 11, where the second combination portion 31 is used for combining with the first combination portion 11, so that the first gasket 10 and the second gasket 30 are connected and fixed when the electrode plate 20 is clamped.

In some embodiments, the first sealing gasket 10 further has the second combination portion 31, and the second sealing gasket 30 further has the first combination portion 11, so that it can be ensured that the first sealing gasket 10 and the second sealing gasket 30 both have the first combination portion 11 and the second combination portion 31, and at the same time, the two are combined with each other, so that the connection positioning is more stable and reliable. Further, for the first gasket 10 provided with the first combined portion 11 and the second combined portion 31, the first combined portion 11 and the second combined portion 31 may be respectively disposed along the diagonal positions of the first gasket 10, and the diagonal positions ensure that the parts of the first gasket 10 and the second gasket 30 are precisely aligned when combined.

At least one electrode plate 20, the electrode plate 20 is located between the first gasket seal 10 and the second gasket seal 30, and the electrode plate 20 has at least one first through portion 21 corresponding to the first combination portion 11, the first combination portion 11 passes through the first through portion 21 and is combined with the second combination portion 31 to fix the electrode plate 20;

the electrode plate 20 is a component that provides an electrochemical reaction site where an oxidation-reduction reaction occurs in the fuel cell and conducts electricity. Specifically, the electrode plate 20 may be an anode plate, a cathode plate, or a bipolar plate, and in some embodiments of the present application, the electrode plate 20 may be a metal plate, such as a copper conductive plate. In other embodiments of the present application, the electrode plate 20 may be a non-metallic plate, such as a conductive graphite plate. Wherein, the electrode plate 20 is located between the first sealing gasket 10 and the second sealing gasket 30, so that the first sealing gasket 10 and the second sealing gasket 30 clamp and fix the electrode plate 20.

Specifically, referring to fig. 3, fig. 3 shows a schematic structural diagram of an electrode plate 20 in an embodiment of the present application, wherein the electrode plate 20 has at least one first through portion 21 corresponding to the first combination portion 11, so that the first combination portion 11 passes through the first through portion 21 to be combined with the second combination portion 31 to fix the electrode plate 20, generally, in order to ensure that the first combination portion 11 can directly fix the electrode plate 20, the shape of the first through portion 21 generally conforms to the shape of the first combination portion 11, but is not limited thereto, for example, the first through portion 21 may be slightly larger than the first combination portion 11, and the electrode plate 20 is pressed by a pressing force during stacking the fuel cell stack, so as to prevent the electrode plate 20 from translating.

Exemplarily, referring to fig. 4, fig. 4 shows a schematic structural diagram of a first combining part 11 and a second combining part 31 when the first combining part 11 and the second combining part 31 are combined in the embodiment of the present application, the first combining part 11 is a cylindrical protrusion 111, the second combining part 31 is a cylindrical groove 311 which is matched with the cylindrical protrusion 111, and the combination of the first combining part 11 and the second combining part 31 is realized through the matching of the cylindrical protrusion 111 and the cylindrical groove 112. In some embodiments, a combination portion may be disposed on both sides of the insulating spacer to facilitate connection of a plurality of sealing spacers, for example, referring to fig. 4, the first sealing spacer 10 has a plurality of cylindrical protrusions 111 disposed on a side facing the electrode plate 20 and a side facing away from the electrode plate 20, the second sealing spacer 30 has a plurality of cylindrical recesses 311 disposed on a side facing the electrode plate 20 and a side facing away from the electrode plate 20, and for the electrode plate 20 between the first sealing spacer 10 and the second sealing spacer 30, the cylindrical recesses 311 facing the electrode plate 20 are engaged with the cylindrical protrusions 111 to achieve fixation, and for the electrode plate 20 of the previous layer or the next layer, the first sealing spacer 10 or the second sealing spacer 30 may be combined with the adjacent sealing spacer to achieve fixation.

When the fuel cell stack, because the upper and lower surfaces of each electrode plate 20 all have first seal gasket 10 and second seal gasket 30, consequently, only need insert the first integrated part 11 of first seal gasket 10 with the portion of running through of electrode plate 20 in proper order when the group is piled up, then make up second integrated part 31 and the first integrated part 11 of second seal gasket 30, repeat above-mentioned process to a plurality of electrode plates 20, can directly obtain the accurate fuel cell stack in location through the mode of piling up, need not to adopt the external surface positioner or adopt the pin location to carry out the group of fuel cell process, the pile equipment degree of difficulty is little, the equipment degree of precision is high, the installation stroke is short, be difficult to cause the equipment difficulty, and insulating gasket can be along with pressing the pile process and produce the displacement together, can not cause the risk of interfering with the end plate.

It should be noted that the above description of the fuel cell stack structure is only exemplary, and those skilled in the art can modify the above components equally under the guidance of the present application, for example, a plurality of first combining portions 11 can be uniformly arranged on the first sealing gasket 10 in a ring shape. For another example, referring to fig. 5, fig. 5 shows another schematic structural diagram of the first combination portion 11 and the second combination portion 31 when they are combined in the embodiment of the present application, where the first combination portion 11 is the cylinder 112, and the second combination portion 31 is the through hole 312 matched with the cylinder 112. For another example, referring to fig. 6, fig. 6 shows another schematic structural diagram of the first combining part 11 and the second combining part 31 when combined in the embodiment of the present application, wherein the first combining part 11 is the fitting block 113, and the second combining part 31 is the fitting opening 313. For another example, the fuel cell stack may further include other components such as a membrane electrode assembly, a potential detection assembly, and the like.

Due to the manufacturing precision, the fuel cell stack is prone to an accumulated error in the stacking process, for example, the first protrusion of the first insulating gasket is shifted by 0.01mm, and after the stack is stacked to 100 layers, the accumulated deviation is 1 mm.

With reference to fig. 7, fig. 7 is a schematic structural diagram of the first combination portion 11 and the second combination portion 31 when they are combined according to the embodiment of the present application. The second assembly portion 31 has a first space 41 for accommodating the first assembly portion 11 to move along the first direction, and the first direction is parallel to the electrode plate 20, so that the first assembly portion 11 of the first sealing gasket 10 can translate in the second assembly portion 31 to further drive the electrode plate 20 to translate, and the accumulated deviation of the fuel cell stack is eliminated, generally, the first space 41 of the second assembly portion 31 can be set at every certain number (for example, 20 layers, 50 layers) of insulating spacers at the electrode plate 20, or can be calculated according to the measured deviation of a single insulating spacer, and the insulating spacer therebetween does not need to set the first space 41.

In some embodiments of the present application, in order to ensure that the first sealing gasket 10 and the second sealing gasket 30 can be sufficiently tightly attached to the electrode sheet, the second combining portion 31 has a second space 42 for accommodating the first combining portion 11 to move along a second direction, which is a direction perpendicular to the electrode plate 20, so that there is a margin when the first combining portion 11 and the second combining portion 31 are combined, and a phenomenon that the first combining portion 11 pushes the second combining portion 31 away so that the second sealing gasket 30 cannot be tightly attached to the electrode plate 20 is avoided.

It should be noted that the above description of the first combining portion 11 and the second combining portion 31 being combined to eliminate the accumulated deviation is only exemplary, and those skilled in the art may modify the above components equally under the guidance of the present application, for example, the second combining portion 31 may be provided as a chute with a certain length, and the first combining portion 11 moves in the direction of the chute in the second combining portion 31 to realize the adjustment of the accumulated deviation in the fixed direction.

Further, in order to better implement the fuel cell end plate in the embodiments of the present application, on the basis of the fuel cell end plate, a fuel cell is further provided in the embodiments of the present application, and the fuel cell includes the fuel cell stack structure described in any of the embodiments above.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be considered merely illustrative and not restrictive of the broad application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

It should be noted that in the foregoing description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

The foregoing detailed description of the fuel cell stack structure and the fuel cell provided in the embodiments of the present application has been provided, and the principles and embodiments of the present invention are described herein by using specific examples, and the description of the foregoing examples is only provided to help understanding the method and the core concept of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A fuel cell stack structure, comprising:

at least one first sealing gasket having at least one first combination portion;

at least one second sealing gasket, wherein the second sealing gasket is provided with at least one second combination part corresponding to the first combination part; and

the electrode plate is positioned between the first sealing gasket and the second sealing gasket and is provided with at least one first penetrating part corresponding to the first combination part, and the first combination part penetrates through the first penetrating part to be combined with the second combination part so as to fix the electrode plate.

2. A fuel cell stack structure according to claim 1,

the second combining part has a first space for accommodating the first combining part to move along a first direction, and the first direction is parallel to the electrode plate.

3. A fuel cell stack structure according to claim 1,

the second combining part has a second space for accommodating the first combining part to move along a second direction, and the second direction is a direction perpendicular to the electrode plates.

4. A fuel cell stack structure according to claim 1,

the first combination portion is a cylindrical protrusion, and the second combination portion is a cylindrical groove matched with the cylindrical protrusion.

5. A fuel cell stack structure according to claim 4,

the first sealing gasket has a plurality of the cylindrical protrusions disposed on a surface facing the electrode plate and a surface facing away from the electrode plate.

The second sealing gasket has a plurality of the cylindrical grooves disposed on a side facing the electrode plate and a side facing away from the electrode plate.

6. A fuel cell stack structure according to claim 1,

the first combination portion is a cylinder, and the second combination portion is a through hole matched with the cylinder.

7. A fuel cell stack structure according to claim 1,

the first combination part is a matching block, and the second combination part is a matching port.

8. A fuel cell stack structure according to any one of claims 1 to 7,

the first gasket further includes the second assembly portion, and the second gasket further includes the first assembly portion.

9. A fuel cell stack structure according to claim 8,

the first combination portion and the second combination portion are arranged along the diagonal positions of the first sealing gasket respectively.

10. A fuel cell comprising the fuel cell stack structure according to any one of claims 1 to 9.