Collector plate for hydrogen fuel cell stack

Abstract

The utility model discloses a collector plate for a hydrogen fuel cell stack, and relates to the technical field of collector plates. The device comprises a first collector plate and a second collector plate, oxidizing agent injection grooves are formed in the surfaces of the first collector plate and the second collector plate, cooling liquid injection grooves are formed in the surfaces of the first collector plate and the second collector plate, and hydrogen injection grooves are formed in the surfaces of the first collector plate and the second collector plate; one side of the oxidant injection groove is provided with an oxidant channel, and one end of the oxidant channel far away from the oxidant injection groove is provided with an oxidant outlet; and a cooling liquid circulation channel is formed in one side of the cooling liquid injection groove. Through the effect of the reinforcing ribs, the reinforcing ribs are additionally arranged at the blank positions of the cooling liquid circulation channels, so that the strength of the first collector plate and the second collector plate after integration can be greatly enhanced, and the situation that the first collector plate and the second collector plate are deformed and damaged due to vibration or friction during use is avoided; therefore, the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of current collecting plates, and in particular relates to a current collecting plate used for a hydrogen fuel cell stack. Background Art

[0002] As a new type of energy conversion device, fuel cells have attracted more and more attention for their many advantages such as high energy conversion rate, strong reliability, cleanliness, and no noise. Fuel cells are mainly composed of membrane electrodes, bipolar plates, current collectors, end plates, and several battery cells connected in series. The current collector is an important component for the positive and negative output of the stack, and is mainly responsible for collecting and outputting the positive and negative currents of the stack.

[0003] The utility model with publication number "CN113555579A" and name "A Fuel Cell Stack Current Collector Plate" discloses a current collector plate, which can make the fuel cell stack current collector plate and the internal stack in the same temperature zone, which is beneficial to reduce the temperature rise effect of the current collector plate. However, due to its characteristics, its side is relatively thin. After long-term use, if it is impacted by external forces such as collision, it is easy to deform, which is not convenient for subsequent use. Utility Model Content

[0004] The purpose of the utility model is to provide a current collecting plate for a hydrogen fuel cell stack. Through the effect of the reinforcing ribs, the device adds reinforcing ribs in the blank spaces of the coolant circulation channel. This arrangement can greatly enhance the strength of the first current collecting plate and the second current collecting plate after integration, and avoid deformation and damage of the first current collecting plate and the second current collecting plate due to vibration or friction during use, thereby extending the service life of the device and solving the problem that the existing current collecting plate is easily deformed after long-term use, which is inconvenient for subsequent use if it is impacted by external forces such as collisions.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A current collecting plate for a hydrogen fuel cell stack comprises a first current collecting plate and a second current collecting plate which are bonded and fixed to each other, wherein the surfaces of the first current collecting plate and the second current collecting plate are both provided with an oxidant injection groove, the surfaces of the first current collecting plate and the second current collecting plate are both provided with a coolant injection groove, and the surfaces of the first current collecting plate and the second current collecting plate are both provided with a hydrogen injection groove.

[0007] An oxidant channel is opened on one side of the oxidant injection groove, and an oxidant outflow port is opened at one end of the oxidant channel away from the oxidant injection groove.

[0008] A cooling liquid circulation channel is opened on one side of the cooling liquid injection groove, and a cooling liquid outflow port is opened at one end of the cooling liquid circulation channel away from the cooling liquid injection groove.

[0009] One side of the hydrogen injection tank is provided with a hydrogen flow channel, and a hydrogen flow outlet is opened at one end of the hydrogen flow channel away from the hydrogen injection tank.

[0010] Reinforcing grooves are formed inside the first current collector plate, and reinforcing ribs are fixed to the inner walls of the reinforcing grooves.

[0011] Lead-out parts are fixed to one side of both the first current collector plate and the second current collector plate.

[0012] The present utility model is further configured as follows: The reinforcing ribs are arranged in a "w" shape, and a sealing strip is fixed to the outside of the first current collector plate close to the hydrogen injection tank.

[0013] The present utility model is further configured as follows: Wiring holes are formed on the surfaces of the lead-out parts, and a guide tube is fixed to one side of the wiring holes on the surface of the first current collector plate.

[0014] The present utility model is further configured as follows: A plurality of power-taking parts are fixed to the outside of the first current collector plate, and insulating sleeves are fixed to the outside of the power-taking parts.

[0015] The present utility model is further configured as follows: Sealing grooves are formed on the inner walls of the lead-out parts of the first current collector plate, and sealing rings are fixed inside the lead-out parts of the second current collector plate.

[0016] The present utility model has the following beneficial effects:

[0017] 1. Through the action of the reinforcing ribs, the device is provided with reinforcing ribs in the blank space of the coolant flow channel. This setting can greatly enhance the strength of the integrated first current collector plate and second current collector plate, avoiding deformation and damage of the first current collector plate and second current collector plate due to vibration or friction during use, thereby extending the service life of the device.

[0018] 2. Through the action of the sealing grooves and sealing rings, during the use of the device, the sealing grooves and sealing rings can increase the friction between the first current collector plate and the second current collector plate, making the connection between the first current collector plate and the second current collector plate more tight during the working process of the device, and avoiding offset between the first current collector plate and the second current collector plate.

[0019] Of course, it is not necessary for any product implementing the present utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 This is a schematic structural diagram of a current collector plate for a hydrogen fuel cell stack of the present utility model.

[0022] Figure 2 This is a schematic structural diagram of the rear view perspective of the present utility model.

[0023] Figure 3 This is a schematic internal structure diagram of the first current collector plate of the present utility model.

[0024] Figure 4 This is a schematic internal structure diagram of the second current collector plate of the present utility model.

[0025] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0026] 1 - First current collector plate, 2 - Second current collector plate, 3 - Oxidant injection groove, 4 - Coolant injection groove, 5 - Hydrogen injection groove, 6 - Oxidant channel, 7 - Oxidant flow outlet, 8 - Coolant circulation channel, 9 - Coolant flow outlet, 10 - Hydrogen flow channel, 11 - Hydrogen flow outlet, 12 - Reinforcement groove, 13 - Reinforcement rib, 14 - Lead-out part, 15 - Sealing strip, 16 - Wiring hole, 17 - Guide tube, 18 - Power-taking part, 19 - Insulating sleeve, 20 - Sealing groove, 21 - Sealing ring. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the attached drawings and in combination with the embodiments.

[0028] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0029] In the present utility model, unless otherwise stated, the directions such as "up, down" are usually in the directions shown in the attached drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the sake of easy understanding and description, "left, right" are usually in the left and right shown in the attached drawings; "inside, outside" refer to the inside and outside relative to the contour of each component itself, but the above direction terms are not used to limit the present utility model.

[0030] Embodiment 1

[0031] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0032] Specifically, it refers to a current collector plate for a hydrogen fuel cell stack, including a first current collector plate 1 and a second current collector plate 2 that are fixedly attached to each other. Oxidant injection grooves 3 are provided on the surfaces of both the first current collector plate 1 and the second current collector plate 2. Coolant injection grooves 4 are provided on the surfaces of both the first current collector plate 1 and the second current collector plate 2. Hydrogen injection grooves 5 are provided on the surfaces of both the first current collector plate 1 and the second current collector plate 2. An oxidant channel 6 is provided on one side of the oxidant injection groove 3, and an oxidant outlet 7 is provided at one end of the oxidant channel 6 far from the oxidant injection groove 3. A coolant flow channel 8 is provided on one side of the coolant injection groove 4, and a coolant outlet 9 is provided at one end of the coolant flow channel 8 far from the coolant injection groove 4. A hydrogen flow channel 10 is provided on one side of the hydrogen injection groove 5, and a hydrogen outlet 11 is provided at one end of the hydrogen flow channel 10 far from the hydrogen injection groove 5. A strengthening groove 12 is provided inside the first current collector plate 1, and strengthening ribs 13 are fixed to the inner wall of the strengthening groove 12. Lead-out parts 14 are fixed to one side of both the first current collector plate 1 and the second current collector plate 2. When in use, the first current collector plate 1 and the second current collector plate 2 are overlapped and spliced. After the first current collector plate 1 and the second current collector plate 2 are fixed, the oxidant channel 6, the coolant flow channel 8, and the hydrogen flow channel 10 inside the first current collector plate 1 and the second current collector plate 2 are formed. During use, corresponding materials can be injected into the oxidant injection groove 3, the coolant injection groove 4, and the hydrogen injection groove 5 to achieve a cooling effect. At the same time, strengthening ribs 13 are added at the blank spaces of the coolant flow channel 8. This setting can greatly enhance the strength of the integrated first current collector plate 1 and the second current collector plate 2, avoiding deformation and damage of the first current collector plate 1 and the second current collector plate 2 due to vibration or friction during use, thereby extending the service life of the device.

[0033] Embodiment 2

[0034] Please refer to Figures 3-4 , based on Embodiment 1, the present invention provides the following technical solutions:

[0035] The strengthening ribs 13 are arranged in a "w" shape. A sealing strip 15 is fixed to the outside of the first current collector plate 1 near the hydrogen injection groove 5. Wiring holes 16 are provided on the surface of the lead-out part 14, and a guiding tube 17 is fixed to one side of the wiring hole 16 on the surface of the first current collector plate 1. A plurality of power-taking parts 18 are fixed to the outside of the first current collector plate 1, and insulating sleeves 19 are fixed to the outside of the power-taking parts 18. A sealing groove 20 is provided on the inner wall of the lead-out part 14 of the first current collector plate 1, and a sealing ring 21 is fixed inside the lead-out part 14 of the second current collector plate 2. During the use of the device, the sealing groove 20 and the sealing ring 21 can increase the friction between the first current collector plate 1 and the second current collector plate 2, making the connection between the first current collector plate 1 and the second current collector plate 2 closer during the working process of the device and avoiding deviation between the first current collector plate 1 and the second current collector plate 2.

[0036] The working principle of a current collector plate for a hydrogen fuel cell stack provided by the present utility model is as follows: During use, the first current collector plate 1 and the second current collector plate 2 are overlapped and spliced. After fixing the first current collector plate 1 and the second current collector plate 2, the oxidant channels 6, coolant flow channels 8, and hydrogen flow channels 10 are formed inside the first current collector plate 1 and the second current collector plate 2. During use, corresponding materials can be injected into the oxidant injection tank 3, coolant injection tank 4, and hydrogen injection tank 5 to achieve a cooling effect. At the same time, reinforcing ribs 13 are added to the blank spaces of the coolant flow channels 8. This setting can greatly enhance the strength of the integrated first current collector plate 1 and second current collector plate 2, avoiding deformation and damage of the first current collector plate 1 and the second current collector plate 2 due to vibration or friction during use, thereby extending the service life of the device. During the use of the device, the sealing groove 20 and the sealing ring 21 can increase the friction between the first current collector plate 1 and the second current collector plate 2, making the connection between the first current collector plate 1 and the second current collector plate 2 tighter during the working process of the device and preventing offset between the first current collector plate 1 and the second current collector plate 2.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0038] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not elaborate on all details and do not limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can understand and utilize the present utility model well. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A current collector plate for a hydrogen fuel cell stack, comprising a first current collector plate (1) and a second current collector plate (2) that are fixedly attached to each other, characterized in that: Oxidant injection grooves (3) are formed on the surfaces of the first current collector plate (1) and the second current collector plate (2). Coolant injection grooves (4) are formed on the surfaces of the first current collector plate (1) and the second current collector plate (2). Hydrogen injection grooves (5) are formed on the surfaces of the first current collector plate (1) and the second current collector plate (2). An oxidant channel (6) is formed on one side of the oxidant injection groove (3). An oxidant outlet (7) is formed at one end of the oxidant channel (6) away from the oxidant injection groove (3). A coolant flow channel (8) is formed on one side of the coolant injection groove (4). A coolant outlet (9) is formed at one end of the coolant flow channel (8) away from the coolant injection groove (4). A hydrogen flow channel (10) is formed on one side of the hydrogen injection groove (5). A hydrogen outlet (11) is formed at one end of the hydrogen flow channel (10) away from the hydrogen injection groove (5). Reinforcing grooves (12) are formed inside the first current collector plate (1). Reinforcing ribs (13) are fixed to the inner walls of the reinforcing grooves (12). Lead-out parts (14) are fixed to one side of the first current collector plate (1) and the second current collector plate (2).

2. The current collector plate for a hydrogen fuel cell stack according to claim 1, characterized in that, The reinforcing ribs (13) are arranged in a "w" shape. A sealing strip (15) is fixed to the outside of the first current collector plate (1) near the hydrogen injection groove (5).

3. A current collector plate for a hydrogen fuel cell stack according to claim 1, characterized in that, Wiring holes (16) are formed on the surface of the lead-out part (14). A guide tube (17) is fixed to one side of the wiring hole (16) on the surface of the first current collector plate (1).

4. A current collector plate for a hydrogen fuel cell stack according to claim 1, characterized in that, A number of power-taking parts (18) are fixed to the outside of the first current collector plate (1). Insulating sleeves (19) are fixed to the outside of the power-taking parts (18).

5. A current collector plate for a hydrogen fuel cell stack according to claim 1, characterized in that, Sealing grooves (20) are formed on the inner walls of the lead-out parts (14) of the first current collector plate (1). Sealing rings (21) are fixed inside the lead-out parts (14) of the second current collector plate (2).

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