CN219393429U - Fuel cell - Google Patents

Abstract

The application provides a fuel cell comprising a plurality of battery cells; each battery unit comprises a cathode plate and an anode plate which are spaced along the thickness direction of the battery unit; the cathode plates are provided with a first side surface and a meandering ridge arranged on the first side surface; the anode plates are provided with a second side surface and a second meandering ridge arranged on the second side surface; the plurality of battery cells are connected in the thickness direction; the first side surface of the cathode plate of one of the two adjacent battery cells is opposite to the second side surface of the anode plate of the other battery cell, and a cooling channel is defined; in the cathode plate and the anode plate defining the cooling channel, the first serpentine ridge and the second serpentine ridge have a plurality of overlapping portions on a projection plane perpendicular to the thickness direction; at a part of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge have a gap in a thickness direction; at another portion of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge are in contact. The present application aims to reduce the flow resistance of a cooling flow channel.

Description

Fuel cell

Technical Field

The present application relates to the field of battery technologies, and in particular, to a fuel cell.

Background

There are various types of fuel cells. The proton exchange membrane fuel cell is a high-efficiency energy conversion power generation device which takes hydrogen as an optimal fuel and converts chemical energy in fuel and oxidant into electric energy in an electrochemical reaction mode. Proton exchange membrane (Proton Exchange Membrane, PEM for short) fuel cells generally comprise a membrane electrode assembly (Membrane Electrode Assemblies, MEA for short) and two electrode plates. The MEA component consists of a proton exchange membrane, a gas diffusion layer and a catalytic layer, and is a core component for generating electric energy of a fuel cell. The MEA components are flanked by cathode and anode plates. The fuel cell can be formed by stacking a plurality of battery cells, and a cooling flow channel is formed between two adjacent battery cells for cooling the fuel cell by flowing cooling liquid.

However, the flow resistance of the cooling flow passage in the prior art is large.

Disclosure of Invention

The application provides a fuel cell, which aims to reduce the flow resistance of a cooling channel in the fuel cell.

The application provides a fuel cell, which comprises a plurality of battery cells, wherein each battery cell has a thickness direction, and the battery cell comprises a cathode plate and an anode plate which are arranged at intervals in the thickness direction; each of the cathode plates has a first side and a first serpentine ridge disposed on the first side; each anode plate has a second side and a second serpentine ridge disposed on the second side;

the plurality of battery cells are sequentially connected along the thickness direction; wherein, the first side of the cathode plate of one of two adjacent battery monomers is opposite to the second side of the anode plate of the other battery monomer, and the two battery monomers are mutually arranged to jointly define a cooling channel;

in the cathode plate and the anode plate that together define the cooling channel, the first serpentine ridge and the second serpentine ridge have a plurality of overlapping portions on a projection plane perpendicular to the thickness direction,

wherein at a portion of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction; at another portion of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge are in contact.

Optionally, each of the battery cells has a length direction, and at one of two overlapping portions adjacent in the length direction, the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction, and at the other of the two overlapping portions adjacent, the first serpentine ridge and the second serpentine ridge are in contact.

Optionally, each of the battery cells has a width direction, and the first serpentine ridges have a plurality and are arranged at intervals along the width direction; the second serpentine ridges have a plurality of and are arranged at intervals along the width direction; the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at one of two overlapping portions adjacent in the width direction, and the first serpentine ridge and the second serpentine ridge are in contact at the other of the two overlapping portions adjacent.

Optionally, the first serpentine ridge has a plurality of first peaks, a plurality of first valleys, and a first transition disposed between adjacent first peaks and the first valleys; the second serpentine ridge has a plurality of second peaks, a plurality of second valleys, and second transitions between adjacent second peaks and second valleys;

the first transition portion and the second transition portion have a plurality of first overlapping portions on a projection plane perpendicular to the thickness direction in a cathode plate and an anode plate that together define the cooling channel;

wherein the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at one portion of the plurality of first overlapping portions, the first serpentine ridge and the second serpentine ridge being in contact at another portion of the plurality of first overlapping portions.

Optionally, the first peak portion and the second valley portion have a plurality of second overlapping portions on a projection plane perpendicular to the thickness direction; or (b)

The second peak portion and the first valley portion have a plurality of third overlapping portions on a projection plane perpendicular to the thickness direction;

wherein the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at any one of the plurality of second overlapping portions or the plurality of third overlapping portions, the first serpentine ridge and the second serpentine ridge being in contact at another one of the plurality of second overlapping portions or the plurality of third overlapping portions.

Optionally, the first peaks and the first valleys are reverse curved; the second peaks and the second valleys are reverse curved;

the first peak portion and the second peak portion are bent in the same direction, the second valley portion and the first valley portion are bent in the same direction, the first peak portion and the second peak portion are arranged in a staggered mode in a projection plane perpendicular to the thickness direction, and the first valley portion and the second valley portion are arranged in a staggered mode in a projection plane perpendicular to the thickness direction.

Optionally, the first transition portion and the second transition portion are smooth transition portions.

Optionally, the cathode plate has a first liquid-dividing region and a first liquid-collecting region at both ends of the first serpentine ridge;

the anode plate is provided with a second liquid dividing area and a second liquid collecting area which are positioned at two ends of the second serpentine ridge;

in the cathode plate and the anode plate which jointly define the cooling channel, the first liquid separation area and the second liquid separation area jointly define a liquid separation cavity, the first liquid collection area and the second liquid collection area jointly define a liquid collection cavity, and the liquid separation cavity is communicated with the liquid collection cavity through the cooling channel.

Optionally, the cathode plate further comprises a third side surface opposite to the first side surface in the thickness direction, and the third side surface is provided with a first groove corresponding to the first serpentine ridge for cathode gas flow;

the anode plate further comprises a fourth side surface opposite to the second side surface in the thickness direction, and the fourth side surface is provided with a second groove which is arranged corresponding to the second serpentine ridge and used for anode gas flow.

Optionally, each of the battery cells further includes a membrane electrode assembly, and the membrane electrode assembly is disposed between the cathode plate and the anode plate of the same battery cell.

The technical scheme of the embodiment of the application is as follows: the cathode plate and the anode plate both have a thickness direction; each negative plate is provided with a first side surface and a first meandering ridge; each anode plate has a second side and a second serpentine ridge disposed on the second side. The plurality of battery cells are sequentially connected in the thickness direction. Wherein, the first side of the negative plate of one of two adjacent battery monomers is opposite to the second side of the positive plate of the other battery monomer, and the cooling channel is defined jointly. In the cathode plate and the anode plate that collectively define the cooling channel, the first serpentine ridge and the second serpentine ridge have a plurality of overlapping portions on a projection plane perpendicular to the thickness direction, wherein at a part of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction so that the coolant can flow therethrough without blocking the flow of the coolant due to the contact of the two with each other, thereby reducing the flow resistance of the coolant; while at another portion of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge are in contact, both may still be partially in contact to ensure electrical conductivity between two adjacent cells. In the technical solution of the embodiment of the present application, in the case where the gas of the fuel cell has a good diffusion capability, two adjacent cells in the fuel cell also have a good conductivity, and the cooling liquid in the cooling flow channel also has a good flow capability so that it has a good heat dissipation capability. In addition, the serpentine ridge also allows the coolant to flow in a serpentine manner within the cooling channel, increasing its flow path, allowing the coolant to absorb heat sufficiently.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of a unit cell according to an embodiment of the present application;

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

fig. 4 is a schematic structural view of an anode plate provided in an embodiment of the present application;

FIG. 5 is a first arrangement schematic of a first serpentine ridge and a second serpentine ridge according to an embodiment of the present application;

FIG. 6 is a second arrangement schematic of a first serpentine ridge and a second serpentine ridge in an embodiment of the present application;

fig. 7 is a schematic structural view of a fuel cell provided in an embodiment of the present application.

List of reference numerals

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should 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 the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus 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 of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, the term "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 utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model 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.

As shown in fig. 1 and 7, the present application provides a fuel cell 1 including a plurality of cells 10. As shown in fig. 2, the battery cell 10 includes a cathode plate 11 and an anode plate 12. The battery cell 10 further includes a membrane electrode assembly 13 disposed between the cathode plate 11 and the anode plate 12. The cathode plate 11, the membrane electrode assembly 13, and the anode plate 12 are stacked in the thickness direction to form the battery cell 10. The plurality of battery cells 10 are stacked in order in the thickness direction to form the fuel cell 1. Wherein, between two adjacent battery cells 10, a cathode plate 11 and another anode plate 12 are oppositely arranged to construct a cooling channel for flowing cooling liquid.

In the prior art, the opposite sides of the cathode plate 11 are the cathode gas flow path side and the cooling flow path side, respectively. Opposite sides of the anode plate 12 are an anode gas flow path side and a cooling flow path side, respectively. In order to improve the diffusion capability of the cathode gas and the anode gas, the cathode plate 11 and the anode plate 12 are punched to form serpentine grooves on the respective gas flow channel sides, and serpentine ridges are formed on the respective cooling flow channel sides due to the fact that the cathode plate 11 and the anode plate 12 are integral metal plates. After the cooling channels are constructed, the serpentine ridges of the cathode plate 11 and the serpentine ridges of the anode plate 12 are in intersecting contact, increasing the conductivity, but also causing an increase in the flow resistance of the cooling channels, which is detrimental to the flow of the cooling liquid.

For this reason, the technical solution in the embodiment of the present application is: each of the battery cells 10 has a thickness direction. Each of the battery cells 10 includes the cathode plate 11 and the anode plate 12 spaced apart in the thickness direction thereof; as shown in fig. 3, each of the cathode plates 11 has a first side S1 and a first serpentine ridge 111 provided on the first side; as shown in fig. 4, each anode plate 12 has a second side S2 and a second serpentine ridge 112 disposed on the second side S2. The plurality of battery cells 10 are sequentially connected in the thickness direction. Wherein the first side S1 of the cathode plate 11 of one of the adjacent two battery cells 10 is disposed opposite to the second side S2 of the anode plate 12 of the other, and together define a cooling channel. As shown in fig. 5 and 6, in the cathode plate 11 and the anode plate 12 that together define the cooling channel, the first serpentine ridge 111 and the second serpentine ridge 112 have a plurality of overlapping portions a on a projection plane perpendicular to the thickness direction, wherein at a part of the plurality of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 have a gap (not shown) in the thickness direction so that the cooling liquid can flow therethrough without blocking the flow of the cooling liquid due to the contact of the two with each other, thereby reducing the flow resistance of the cooling liquid; while at the other part of the plurality of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 are in contact, both of which are still partially contactable to ensure electrical conductivity between the adjacent two battery cells 10.

In the technical solution of the embodiment of the present application, in the case where the gas of the fuel cell 1 has a good diffusion capability, the two adjacent cells 10 in the fuel cell 1 also have a good electrical conductivity, and the cooling liquid in the cooling flow channel also has a good flow capability so that it has a good heat dissipation capability. In addition, the serpentine ridge also allows the coolant to flow in a serpentine manner within the cooling channel, increasing its flow path, allowing the coolant to absorb heat sufficiently.

The projections of the first serpentine ridge 111 and the second serpentine ridge 112 on the projection plane in the thickness direction have a plurality of portions intersecting each other, that is, a plurality of overlapping portions a. In three-dimensional space, the first serpentine ridge 111 and the second serpentine ridge 112 may be in contact at the overlapping portion a of one portion or may have a gap at the overlapping portion a of the other portion. When the coolant flows to the contact position of the first serpentine ridge 111 and the second serpentine ridge 112, the coolant is blocked, and the flow resistance increases, thereby disturbing the flow at the contact position. When the coolant flows to the overlapping portion a of the first serpentine rib 111 and the second serpentine rib 112 without contacting, the coolant passes through the gap, and the flow resistance thereof is reduced. Therefore, the flow resistance of the cooling liquid is reduced in the entire cooling flow passage, facilitating the flow thereof.

In an embodiment, adjacent first serpentine ridges 111 define a first flow path therebetween for coolant flow; in an embodiment, adjacent second serpentine ridges 112 define a second flow path therebetween for coolant flow. The first serpentine ridge 111 and the second serpentine ridge 112 together define a cooling flow path H for the flow of a cooling fluid.

In an embodiment, the cathode plate 11 further includes a third side surface opposite to the first side surface S1 in the thickness direction, the third side surface being provided with a first groove provided in correspondence with the first serpentine ridge 111 for cathode gas flow. For example, the first serpentine ridge 111 is formed by stamping the third side of the body of the cathode plate 11, and thus the third side of the body of the cathode plate 11 corresponds to the first groove of the first serpentine ridge 111. The first grooves are for cathode gas flow. The anode plate 12 further includes a fourth side surface opposite to the second side surface S2 in the thickness direction, the fourth side surface being provided with a second groove provided in correspondence with the second serpentine ridge 112 for anode gas flow. For example, the second serpentine ridge 112 is formed by stamping the fourth side of the plate body of the anode plate 12, and thus the fourth side of the body of the anode plate 12 corresponds to the second groove having the first serpentine ridge. The second trench is for anode gas flow.

For convenience of description, in the following embodiment, the overlapping portion a is understood as a portion where the first serpentine ridge 111 and the second serpentine ridge 112 intersect each other on a projection plane perpendicular to the thickness direction.

As an alternative to the above embodiment, as shown in fig. 5, each of the battery cells 10 has a length direction. The first serpentine ridge 111 and the second serpentine ridge 112 each meander along the length. The overlapping portions a are plural, and the plural overlapping portions a are spaced apart in the longitudinal direction. At one of the two overlapping portions a adjacent in the length direction, the first serpentine ridge 111 and the second serpentine ridge 112 have a gap in the thickness direction, and at the other of the two overlapping portions a adjacent, the first serpentine ridge 111 and the second serpentine ridge 112 are in contact. For example, in the flow direction of the cooling liquid, the overlapping portions a of the first serpentine rib 111 and the second serpentine rib 112 are alternately arranged in a gap-contact-gap-contact manner, so that the flow resistance of the cooling channel can be reduced while ensuring good electrical conductivity of two adjacent battery cells 10.

As an alternative to the above-described embodiment, each of the battery cells 10 has a width direction, as shown in fig. 6. In general, in the application of the fuel cell 1, the width direction is generally the gravitational direction or the height direction. The first serpentine ridge 111 has a plurality and is disposed at intervals in the width direction; the second serpentine rib 112 has a plurality and is disposed at intervals in the width direction. At one of the two overlapping portions a adjacent in the width direction, the first serpentine ridge 111 and the second serpentine ridge 112 have a gap in the thickness direction, and at the other of the two overlapping portions a adjacent, the first serpentine ridge 111 and the second serpentine ridge 112 are in contact. For example, the overlapping portions a of the first serpentine rib 111 and the second serpentine rib 112 are alternately arranged in a gap-contact-gap-contact manner in the vertical direction of the flow of the cooling liquid, so that only a portion of the cooling liquid is blocked in the same flow cross section, and thus the flow resistance of the cooling channel can be reduced while ensuring good conductivity of two adjacent battery cells 10.

As an alternative implementation of the above embodiment, the first serpentine ridge 111 has a plurality of first peaks 111b, a plurality of first valleys 111c, and first transitions 111a provided between adjacent first peaks 111b and the first valleys 111 c; the second serpentine ridge 112 has a plurality of second peaks 121b, a plurality of second valleys 121c, and second transitions 121a disposed between adjacent second peaks 121b and second valleys 121 c. The serpentine ridge has valleys and peaks to facilitate good diffusion of the gas from the gas side of each of the cathode plate 11 and the anode plate 12. The transition portion is provided to ensure smooth flow of the gas.

In the embodiment, as shown in fig. 5, in the cathode plate 11 and the anode plate 12 that collectively define the cooling channels, the first transition portion 111a and the second transition portion 121a have a plurality of first overlapping portions a1 on a projection plane perpendicular to the thickness direction. That is, in the present embodiment, the overlapping portion a includes a plurality of first overlapping portions a1 intersected by the first transition portion 111a of the first serpentine ridge 111 and the second transition portion 121a of the second serpentine ridge 112. For convenience of description, the plurality of first overlapping portions a1 are a first group of overlapping portions a. In the first set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 have a gap in the thickness direction at one portion of the plurality of first overlapping portions a1, and the first serpentine ridge 111 and the second serpentine ridge 112 are in contact at another portion of the plurality of first overlapping portions a1.

As an alternative implementation of the above-described embodiment, as shown in fig. 5 or 6, the first peak portion 111b and the second valley portion 121c have a plurality of second overlapping portions a2 on a projection plane perpendicular to the thickness direction; or the second peak portion 121b and the first valley portion 111c have a plurality of third overlapping portions a3 on a projection plane perpendicular to the thickness direction; that is, in the present embodiment, the overlapping portion a includes a portion intersected by the first peak 111b of the first serpentine ridge 111 and the second valley 121c of the second serpentine ridge 112 or a portion intersected by the first valley 111c of the first serpentine ridge 111 and the second peak 121b of the second serpentine ridge 112. The first overlapping parts a1 are a first group; the plurality of second overlapping sites a2 are the second group or the plurality of third overlapping sites a3 are the third group.

In some embodiments, in the first set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 have a gap in the thickness direction at one portion of the plurality of first overlapping portions a1, and the first serpentine ridge 111 and the second serpentine ridge 112 contact at another portion of the plurality of first overlapping portions a1. In the second set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 are in contact at the locations of the plurality of first overlapping portions a1. In the third set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 each have a gap in the thickness direction at the portion of the plurality of first overlapping portions a1.

In some embodiments, in the first set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 have a gap in the thickness direction at one portion of the plurality of first overlapping portions a1, and the first serpentine ridge 111 and the second serpentine ridge 112 contact at another portion of the plurality of first overlapping portions a1. In the second set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 have gaps at the locations of the plurality of first overlapping portions a 1; alternatively, in the third set of overlapping portions a, the first serpentine ridge 111 and the second serpentine ridge 112 each have contact in the thickness direction at the portions of the plurality of first overlapping portions a1.

Alternatively, still other embodiments are: the first serpentine ridge 111 and the second serpentine ridge 112 are disposed in contact at any one of the first, second, and third sets of overlapping portions a, and the other two sets are disposed as gaps. Or still other embodiments are: the first serpentine ridge 111 and the second serpentine ridge 112 are disposed in contact at a first set of overlapping sites a; any one of the second and third sets of overlapping portions a and a is set to be in contact, and the other set is set to be in gap.

In the above embodiment, it is considered that in practical use, since water is generated in the gas flow passage on the cathode plate 11 side, in general, a protrusion is provided in the region of the groove corresponding to the valley portion thereof, and thus a concave design is performed in the position of the top surface of the first serpentine ridge 111 corresponding to the valley portion. Therefore, in the case of reducing the amount of water in the gas flow passage side of the cathode plate 11, in general, the first serpentine ridge 111 and the second serpentine ridge 112 are disposed with a gap therebetween at the third set of overlapping portions a; while the second overlapping parts a in the other two groups are arranged to be contacted, one part of the first overlapping parts a is arranged to be a gap, and the other part is arranged to be contacted (simultaneously, the conductivity and the flow resistance are both considered); or the second set of overlapping portions a in the other two sets are set to be in contact, and the first set of overlapping portions a are all set to be in contact (if for higher conductivity); alternatively or in addition, the second set of overlapping portions a of the two other sets are arranged to be in contact, and the first set of overlapping portions a are all arranged to be gaps (if for a lower flow resistance).

In the above embodiment, the technical means that the first serpentine ridge 111 and the second serpentine ridge 112 are provided as the gaps at the overlapping portion a may be: at the overlapping portion a, the first serpentine ridge 111 and the second serpentine ridge 112 protrude from the cathode plate 11 body and the anode plate 12 body to a lower height than the rest; for example, at the overlapping portion a, the first serpentine ridge 111 is provided with a recessed region 1111.

As an alternative implementation of the above embodiment, the first peaks 111b and the first valleys 111c are reversely curved; the second peak portions 121b and the second valley portions 121c are reversely curved; the first peak 111b and the second peak 121b are bent in the same direction, the second valley 121c and the first valley 111c are bent in the same direction, the first peak 111b and the second peak 121b are arranged in a staggered manner in a projection plane perpendicular to the thickness direction, and the first valley 111c and the second valley 121c are arranged in a staggered manner in a projection plane perpendicular to the thickness direction. For example, the first peak 111b and the second peak 121b are periodically shifted in the longitudinal direction. For example, the first valley 111c and the second valley 121c are periodically offset in the longitudinal direction. In the embodiment, the first peak portions 111b and the first valley portions 111c are arranged periodically alternately in the length direction, similarly to the trend of a sine or cosine function. The second peak portions 121b and the second valley portions 121c are alternately arranged in the longitudinal direction, similarly to the trend of a sine or cosine function.

As an alternative to the above embodiment, the first transition portion 111a and the second transition portion 121a are smooth transition portions. For example, the first transition portion 111a and the second transition portion 121a may be provided in a smooth streamline shape, such as a circular arc transition, a smooth curve shape. The provision of smooth transitions is mainly to reduce the flow resistance of the cooling liquid in the serpentine flow channel.

As an alternative to the above examples, the cathode plate 11 has a first liquid separation zone and a first liquid collection zone at both ends of the first serpentine ridge 111; the anode plate 12 has a second liquid separation region and a second liquid collection region located at opposite ends of the second serpentine ridge 112; in the cathode plate 11 and the anode plate 12 which jointly define the cooling channel, the first liquid-dividing region and the second liquid-dividing region jointly define a liquid-dividing cavity, the first liquid-collecting region and the second liquid-collecting region jointly define a liquid-collecting cavity, and the liquid-dividing cavity is communicated with the liquid-collecting cavity through the cooling channel. In an embodiment, the liquid separation chamber is in communication with a cooling liquid supply pipe. The liquid collecting cavity is communicated with the cooling liquid discharging pipe. The cooling liquid enters the liquid separating cavity through the cooling liquid supply pipe, then enters the cooling channel, flows to the liquid collecting cavity, and then absorbs heat in the cooling liquid drain pipe. The coolant supply pipe and the coolant discharge pipe may be provided using a conventional structure of the fuel cell 1.

In the above embodiment, a sealing member is further provided between the cathode plate 11 and the anode plate 12 in two adjacent battery cells 10, and the sealing member deforms when the battery cells 10 are stacked so as to avoid the loss of the cooling liquid. The fuel cell 1 further includes two end plates between which the plurality of battery cells 10 are disposed. Since the seal and end plate structure is not the focus of improvement in this application, conventional arrangements in the art may be employed and are not described in detail herein.

While a fuel cell provided by the embodiments of the present application has been described in detail, specific examples are set forth herein to illustrate the principles and embodiments of the present utility model, and the description of the above examples is merely intended to facilitate an understanding of the methods of the present utility model and their core ideas; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. A fuel cell comprising a plurality of cells, each cell having a thickness direction, the cells comprising a cathode plate and an anode plate disposed at intervals in the thickness direction; each of the cathode plates has a first side and a first serpentine ridge disposed on the first side; each anode plate has a second side and a second serpentine ridge disposed on the second side;

the plurality of battery cells are sequentially connected along the thickness direction; wherein, the first side of the cathode plate of one of two adjacent battery monomers is opposite to the second side of the anode plate of the other battery monomer, and the two battery monomers are mutually arranged to jointly define a cooling channel;

in the cathode plate and the anode plate that together define the cooling channel, the first serpentine ridge and the second serpentine ridge have a plurality of overlapping portions on a projection plane perpendicular to the thickness direction,

wherein at a portion of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction; at another portion of the plurality of overlapping portions, the first serpentine ridge and the second serpentine ridge are in contact.

2. The fuel cell according to claim 1, wherein each of the cells has a longitudinal direction,

the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at one of two overlapping portions adjacent in the length direction, and the first serpentine ridge and the second serpentine ridge are in contact at the other of the two overlapping portions adjacent.

3. The fuel cell according to claim 1, wherein each of the cells has a width direction,

the first serpentine ridges have a plurality of and are arranged at intervals along the width direction; the second serpentine ridges have a plurality of and are arranged at intervals along the width direction;

the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at one of two overlapping portions adjacent in the width direction, and the first serpentine ridge and the second serpentine ridge are in contact at the other of the two overlapping portions adjacent.

4. The fuel cell of claim 1, wherein the first serpentine ridge has a plurality of first peaks, a plurality of first valleys, and a first transition disposed between adjacent first peaks and the first valleys; the second serpentine ridge has a plurality of second peaks, a plurality of second valleys, and second transitions between adjacent second peaks and second valleys;

the first transition portion and the second transition portion have a plurality of first overlapping portions on a projection plane perpendicular to the thickness direction in a cathode plate and an anode plate that together define the cooling channel;

wherein the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at one portion of the plurality of first overlapping portions, the first serpentine ridge and the second serpentine ridge being in contact at another portion of the plurality of first overlapping portions.

5. The fuel cell according to claim 4, wherein the first peak portion and the second valley portion have a plurality of second overlapping portions on a projection plane perpendicular to the thickness direction; or (b)

The second peak portion and the first valley portion have a plurality of third overlapping portions on a projection plane perpendicular to the thickness direction;

wherein the first serpentine ridge and the second serpentine ridge have a gap in the thickness direction at any one of the plurality of second overlapping portions or the plurality of third overlapping portions, the first serpentine ridge and the second serpentine ridge being in contact at another one of the plurality of second overlapping portions or the plurality of third overlapping portions.

6. The fuel cell of claim 4 or 5, wherein the first peak and the first valley are reverse curved; the second peaks and the second valleys are reverse curved;

the first peak portion and the second peak portion are bent in the same direction, the second valley portion and the first valley portion are bent in the same direction, the first peak portion and the second peak portion are arranged in a staggered mode in a projection plane perpendicular to the thickness direction, and the first valley portion and the second valley portion are arranged in a staggered mode in a projection plane perpendicular to the thickness direction.

7. The fuel cell of claim 4, wherein the first transition and the second transition are smooth transitions.

8. The fuel cell of claim 1 wherein the cathode plate has a first liquid dividing region and a first liquid collecting region at either end of the first serpentine ridge;

the anode plate is provided with a second liquid dividing area and a second liquid collecting area which are positioned at two ends of the second serpentine ridge;

in the cathode plate and the anode plate which jointly define the cooling channel, the first liquid separation area and the second liquid separation area jointly define a liquid separation cavity, the first liquid collection area and the second liquid collection area jointly define a liquid collection cavity, and the liquid separation cavity is communicated with the liquid collection cavity through the cooling channel.

9. The fuel cell according to claim 1, wherein the cathode plate further includes a third side surface opposite to the first side surface in the thickness direction, the third side surface being provided with a first groove provided in correspondence with the first serpentine ridge for cathode gas flow;

the anode plate further comprises a fourth side surface opposite to the second side surface in the thickness direction, and the fourth side surface is provided with a second groove which is arranged corresponding to the second serpentine ridge and used for anode gas flow.

10. The fuel cell of claim 1, wherein each of the cells further comprises a membrane electrode assembly disposed between a cathode plate and an anode plate of the same cell.