A fuel cell separator

Abstract

The utility model discloses a kind of fuel cell spacers, it is related to fuel cell spacer technical field;Conductive layer is equipped with outside base layer, and protective mechanism is equipped with outside base layer and conductive layer, protective mechanism includes first corrosion-resistant layer, first corrosion-resistant layer is fixedly connected with base layer, and second corrosion-resistant layer is equipped with outside conductive layer, first corrosion-resistant layer outside is equipped with first laminating layer, second corrosion-resistant layer outside is equipped with second laminating layer;First laminating layer and second laminating layer outside are equipped with groove, and groove outside is equipped with laminating mechanism, laminating mechanism includes backing plate, backing plate bottom is equipped with pad foot. By setting first corrosion-resistant layer outside base layer, second corrosion-resistant layer is set outside conductive layer, form the layered protective structure of base layer, conductive layer and corrosion-resistant layer, effectively isolate fuel cell working environment in reaction gas and electrolyte and other corrosive media, avoid base layer structure damage and conductive layer performance attenuation, increase the protective property of the equipment when using.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell spacer technology, specifically a fuel cell spacer. Background Technology

[0002] Fuel cell spacers, often referred to as bipolar plates, are one of the core components of a fuel cell. They are used to stack multiple cell units to form a fuel cell stack, playing a crucial role in conducting current and distributing reactant gases. The spacer needs to establish a current path between the series-connected anode and cathode to conduct the current generated within the cell to the outside. This requires it to have low contact resistance to ensure current conduction efficiency and reduce energy loss. However, existing fuel cell spacers have some shortcomings, such as: Existing fuel cell spacers may not have a layered protective structure, with the base layer and conductive layer directly exposed to the working environment. Lacking a dedicated corrosion-resistant layer, they are easily corroded by reaction gases and electrolytes under long-term use, leading to structural damage and decreased conductivity. Therefore, we propose a fuel cell spacer to address the problems mentioned above. Utility Model Content

[0003] The purpose of this invention is to provide a fuel cell spacer to solve the problem mentioned in the background art that current fuel cell spacers on the market may lack protection, leading to structural damage and decreased conductivity.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fuel cell spacer, comprising a base layer and fixed cover plates disposed on the top and bottom of the base layer; A conductive layer is provided on the outside of the base layer, and a protective mechanism is provided on the outside of the base layer and the conductive layer. The protective mechanism includes a first corrosion-resistant layer, which is fixedly connected to the base layer. A second corrosion-resistant layer is provided on the outside of the conductive layer, and a first bonding layer is provided on the outside of the first corrosion-resistant layer. A second bonding layer is provided on the outside of the second corrosion-resistant layer. The first and second bonding layers have grooves on their outer sides, and a bonding mechanism is provided on the outer side of the grooves. The bonding mechanism includes a pad, and a foot is installed at the bottom of the pad. The outer sides of the first and second bonding layers are fixedly connected to the foot.

[0005] By setting a first corrosion-resistant layer on the outside of the base layer and a second corrosion-resistant layer on the outside of the conductive layer, a layered protective structure of base layer, conductive layer and corrosion-resistant layer is formed, which can effectively isolate corrosive media such as reaction gases and electrolytes in the working environment of fuel cells, avoid damage to the base layer structure and performance degradation of the conductive layer, significantly extend the service life of the spacer, and thus increase the protection of the equipment during use.

[0006] As a preferred technical solution of this utility model, sealing joints are provided on both the left and right sides of the outer side of the base layer, and contacts are provided on the outer side of the sealing joints. Furthermore, an induction line is provided inside the base layer. The base layer is electrically connected to a voltage detector through the induction line, and the voltage detector is fixedly connected to the sealing joint.

[0007] The above technical solution can rigidly fix the sealing joint to the base layer, ensure stable current conduction, reduce power loss, improve the connection efficiency with external circuits due to the low resistance characteristics of the contacts, and avoid voltage fluctuations caused by poor contact.

[0008] As a preferred technical solution of this utility model, the first corrosion-resistant layer and the second corrosion-resistant layer are sealed and connected to the sealing joint, and the top and bottom of the first corrosion-resistant layer and the second corrosion-resistant layer are fixedly connected to the fixed cover plate.

[0009] The above technical solution enables the first corrosion-resistant layer, the second corrosion-resistant layer and the sealing joint to be sealed together, forming a full-coverage protection that completely isolates the erosion of reactive gases and electrolytes. The fixed connection between the corrosion-resistant layer and the fixed cover plate enhances the overall structural stability of the spacer and avoids compression deformation when the fuel cell is stacked.

[0010] As a preferred embodiment of this utility model, the top and bottom of the first bonding layer and the second bonding layer are fixedly connected to the fixed cover plate, and the groove is fixedly connected to the pad plate.

[0011] The above technical solution enables the first and second bonding layers to be fixedly connected to the fixed cover plate, buffering the vibration during fuel cell operation, reducing component wear, and the flexible characteristics of the bonding layers can compensate for installation errors, ensuring that each layer structure is tightly bonded and avoiding gas leakage.

[0012] As a preferred embodiment of this utility model, the outer sides of the first and second bonding layers are fixedly connected to the sealing joint, and the outer side of the sealing joint is provided with a connecting groove.

[0013] The above technical solution enables the bonding layer to be fixedly connected to the sealing joint, further enhancing the sealing effect and preventing corrosive media from entering through the joint gaps. The connecting groove provides a standardized connection interface for external pipelines or circuits, eliminating the need for customized special joints.

[0014] As a preferred technical solution of this utility model, a snap-fit ​​pad is provided on the outer side of the first bonding layer, and the connecting groove and the snap-fit ​​pad are used to bond and fix the outer side of the battery.

[0015] The above technical solution enables the mating of the snap-fit ​​pad and the connecting groove to achieve a tight fit between the spacer and the fuel cell unit, reducing contact resistance and improving current conduction efficiency.

[0016] As a preferred technical solution of this utility model, an insulating bolt is provided on the outside of the groove, and a plate is provided at the bottom of the insulating bolt. The plate can be used in conjunction with the pad to fix the fuel cell.

[0017] The above technical solution enables the insulating bolts to achieve insulating fixation of the spacer, avoid current leakage, ensure the power safety of the fuel cell, and the cooperation between the plate and the pad forms a multi-point fixation, ensuring that the spacer is firmly fixed to the fuel cell unit and avoiding displacement during transportation or operation.

[0018] Compared with the prior art, the beneficial effects of this utility model are: by setting a first corrosion-resistant layer on the outside of the base layer and a second corrosion-resistant layer on the outside of the conductive layer, a layered protective structure of base layer, conductive layer and corrosion-resistant layer is formed, which can effectively isolate corrosive media such as reaction gas and electrolyte in the working environment of fuel cell, avoid damage to the base layer structure and performance degradation of the conductive layer, significantly extend the service life of the spacer, and thus increase the protection of the device during use. Furthermore, by setting the first corrosion-resistant layer and the second corrosion-resistant layer, the first corrosion-resistant layer and the second corrosion-resistant layer can be sealed to the sealing joint to form a full-coverage protection, completely isolating the erosion of the reaction gas and electrolyte. The fixed connection between the corrosion-resistant layer and the fixed cover plate enhances the overall structural stability of the spacer and avoids the squeezing deformation when the fuel cell is stacked. Furthermore, the sealing joint allows for a secure connection between the bonding layer and the sealing joint, enhancing the sealing effect and preventing corrosive media from entering through the joint gaps. The connection groove provides a standardized connection interface for external pipelines or circuits, eliminating the need for custom-made special joints. Attached Figure Description

[0019] Figure 1 This is a front view of the structure of this utility model; Figure 2 This is a top-view cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 For the present utility model Figure 2 A magnified structural diagram at point A; Figure 4 This is a three-dimensional structural diagram of the pad of this utility model; Figure 5 This is a front view elevation diagram of Embodiment 2 of the present invention; Figure 6 For the present utility model Figure 5 A magnified structural diagram at point B.

[0020] In the diagram: 1. Base layer; 2. Conductive layer; 3. First corrosion-resistant layer; 4. Second corrosion-resistant layer; 5. First bonding layer; 6. Second bonding layer; 7. Groove; 8. Pad; 9. Foot; 10. Snap-fit ​​pad; 11. Sealing joint; 1101. Connecting groove; 1102. Contact; 12. Fixing cover plate; 13. Voltage detector; 14. Insulating bolt; 15. Adhesive plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: To address the problem in the prior art that the lack of protection in fuel cell spacers can lead to structural damage and decreased conductivity, the following solution is disclosed. Please refer to [link / reference]. Figures 1-4 The present invention provides a technical solution: a fuel cell spacer, including a base layer 1 and fixed cover plates 12 disposed on the top and bottom of the base layer 1; A conductive layer 2 is provided on the outside of the base layer 1, and a protective mechanism is provided on the outside of the base layer 1 and the conductive layer 2. The protective mechanism includes a first corrosion-resistant layer 3, which is fixedly connected to the base layer 1. A second corrosion-resistant layer 4 is provided on the outside of the conductive layer 2, and a first bonding layer 5 is provided on the outside of the first corrosion-resistant layer 3. A second bonding layer 6 is provided on the outside of the second corrosion-resistant layer 4. The first bonding layer 5 and the second bonding layer 6 have a groove 7 on their outer sides, and a bonding mechanism is provided on the outer side of the groove 7. The bonding mechanism includes a pad 8, and a pad foot 9 is installed at the bottom of the pad 8. The outer sides of the first bonding layer 5 and the second bonding layer 6 are fixedly connected to the pad foot 9. Sealing joints 11 are provided on both the left and right sides of the outer side of the base layer 1, and contacts 1102 are provided on the outer side of the sealing joints 11. Induction wires are provided inside the base layer 1. The base layer 1 is electrically connected to the voltage detector 13 through the induction wires, and the voltage detector 13 is fixedly connected to the sealing joints 11. The first corrosion-resistant layer 3 and the second corrosion-resistant layer 4 are sealed to the sealing joint 11, and the top and bottom of the first corrosion-resistant layer 3 and the second corrosion-resistant layer 4 are fixedly connected to the fixed cover plate 12. The top and bottom of the first bonding layer 5 and the second bonding layer 6 are fixedly connected to the fixed cover plate 12, and the groove 7 is fixedly connected to the pad 8. The outer sides of the first bonding layer 5 and the second bonding layer 6 are fixedly connected to the sealing joint 11, and the outer side of the sealing joint 11 is provided with a connecting groove 1101. The outer side of the first bonding layer 5 is provided with a snap-fit ​​pad 10, and the connecting groove 1101 and the snap-fit ​​pad 10 are bonded and fixed to the outer side of the battery.

[0023] Example 2: This example discloses another fuel cell spacer, which differs from Example 1, as follows: Figures 5-6 As shown, the difference between this embodiment and embodiment 1 is that: an insulating bolt 14 is provided on the outside of the groove 7, and a plate 15 is provided at the bottom of the insulating bolt 14, and the plate 15 can cooperate with the pad 8 to fix the fuel cell. The insulating bolt 14 is installed on the outside of the groove 7. The plate 15 and the pad 8 cooperate to form a multi-point fixing structure, which lays the foundation for subsequent assembly with the fuel cell unit. Then the snap-fit ​​pad 10 will be fixed to the outside of the fuel cell with the plate 15 and the fuel cell.

[0024] Working principle: When using this fuel cell spacer, the base layer 1, the first corrosion-resistant layer 3 and the first bonding layer 5, the conductive layer 2, the second corrosion-resistant layer 4 and the second bonding layer 6 are bonded together in sequence. The first corrosion-resistant layer 3 is rigidly fixed to the base layer 1, and the second corrosion-resistant layer 4 is tightly bonded to the conductive layer 2 to form a targeted layered protection structure. The assembled layered structure is sealed and connected to the sealing joint 11 to ensure that corrosive media cannot enter from the joint gap. The outer side of the fixing cover plate 12 is fixed to the top and bottom of the first corrosion-resistant layer 3 and the second corrosion-resistant layer 4. The pad plate 8 is fixed in the groove 7 on the outer side of the first bonding layer 5 and the second bonding layer 6. The outer side of the pad foot 9 is fixedly connected to the first bonding layer 5 and the second bonding layer 6. When the fuel cell is working, the reactant gas and electrolyte come into contact with the surface of the spacer. The first corrosion-resistant layer 3 is specifically designed to isolate the base layer 1 from corrosion, preventing damage to the base layer 1 structure. The second corrosion-resistant layer 4 specifically protects the conductive layer 2, preventing it from being corroded and causing a decrease in conductivity, ensuring that the spacer can conduct current stably for a long time. At the same time, the voltage detector 13 will detect the conductivity of the conductive layer 2. The connection groove 1101 provides a standardized connection interface for external pipelines or circuits, eliminating the need for customized special connectors and simplifying the assembly process of the fuel cell stack.

[0025] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fuel cell spacer, comprising a base layer (1) and fixed cover plates (12) disposed on the top and bottom of the base layer (1); Its features are: The base layer (1) is provided with a conductive layer (2) on the outside, and a protective mechanism is provided on the outside of the base layer (1) and the conductive layer (2). The protective mechanism includes a first corrosion-resistant layer (3), which is fixedly connected to the base layer (1). A second corrosion-resistant layer (4) is provided on the outside of the conductive layer (2), and a first bonding layer (5) is provided on the outside of the first corrosion-resistant layer (3). A second bonding layer (6) is provided on the outside of the second corrosion-resistant layer (4). The first bonding layer (5) and the second bonding layer (6) are provided with a groove (7) on the outside, and a bonding mechanism is provided on the outside of the groove (7). The bonding mechanism includes a pad (8), and a foot (9) is installed at the bottom of the pad (8). The first bonding layer (5) and the second bonding layer (6) are fixedly connected to the foot (9).

2. The fuel cell spacer according to claim 1, characterized in that, The base layer (1) is provided with sealing joints (11) on both the left and right sides of the outer side, and the sealing joints (11) are provided with contacts (1102) on the outer side. The base layer (1) is provided with induction wires. The base layer (1) is electrically connected to the voltage detector (13) through the induction wires, and the voltage detector (13) is fixedly connected to the sealing joints (11).

3. The fuel cell spacer according to claim 2, characterized in that, The first corrosion-resistant layer (3) and the second corrosion-resistant layer (4) are sealed to the sealing joint (11), and the top and bottom of the first corrosion-resistant layer (3) and the second corrosion-resistant layer (4) are fixedly connected to the fixed cover plate (12).

4. The fuel cell spacer according to claim 3, characterized in that, The top and bottom of the first bonding layer (5) and the second bonding layer (6) are fixedly connected to the fixed cover plate (12), and the groove (7) is fixedly connected to the pad plate (8).

5. The fuel cell spacer according to claim 4, characterized in that, The outer sides of the first bonding layer (5) and the second bonding layer (6) are fixedly connected to the sealing joint (11), and the outer side of the sealing joint (11) is provided with a connecting groove (1101).

6. The fuel cell spacer according to claim 5, characterized in that, The first bonding layer (5) has a snap-fit ​​pad (10) on its outer side, and the connecting groove (1101) and the snap-fit ​​pad (10) are bonded and fixed to the outer side of the battery.

7. The fuel cell spacer according to claim 1, characterized in that, An insulating bolt (14) is provided on the outside of the groove (7), and a plate (15) is provided at the bottom of the insulating bolt (14), and the plate (15) can be used with the pad (8) to fix the fuel cell.

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