Bipolar plate of metal battery

Abstract

The utility model discloses a metal battery bipolar plate which comprises a cathode plate and an anode plate which are formed by stamping a single-layer metal sheet, the anode plate is provided with a plurality of connecting blocks, one side of each connecting block is fixedly provided with a clamping block, the cathode plate is provided with a mounting groove at a position corresponding to the connecting block, and the clamping blocks are fixedly arranged in the mounting grooves. A mounting groove is formed in the anode plate, a clamping block is arranged in the mounting groove, a clamping groove is formed in one side of the mounting groove, the clamping block is movably connected with the clamping groove, the clamping block limits the vertical movement of the anode plate when being mounted in the clamping groove, and a fixing device used for limiting the horizontal movement of the anode plate is further mounted on the cathode plate. And meanwhile, the horizontal movement of the anode plate is limited through the fixing device, so that the anode plate and the cathode plate are preliminarily fixed, the production is simple, the structure is practical, the fixing effect is good, the welding operation is further facilitated, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a metal battery bipolar plate. Background Art

[0002] Proton exchange membrane fuel cells (PEMFCs) are typically assembled from multiple bipolar plates and membrane electrode stacks. Common bipolar plate materials include graphite and metal. As a core component of PEMFCs, bipolar plates isolate the fuel gas, oxidant gas, and coolant. The flow field on the bipolar plates also plays a crucial role in gas distribution, membrane electrode assembly support, electron collection, and heat conduction. Uniform gas distribution along the membrane electrode surface is crucial. Localized gas shortages can lead to uneven electrochemical reactions, localized overheating, and even burn-through of the proton exchange membrane, damaging the PEMFC stack.

[0003] For example, the patent with application number: 202121657234.5 includes a cathode plate, an anode plate and a gasket frame, and the gasket frame is clamped between the cathode plate and the anode plate, and a positioning component for connecting the two is provided between the cathode plate and the anode plate, and the positioning component includes a plurality of positioning cylinders provided on the side of the cathode plate close to the anode plate and a plurality of positioning columns provided on the side of the anode plate close to the cathode plate, the positioning columns are plugged into the positioning cylinders, and the inner cavity of the positioning cylinders is provided with glue for bonding the positioning columns and the positioning cylinders, and the inner cavity of the positioning cylinders is provided with a containing film for encapsulating the glue. This application has the effect of effectively improving welding efficiency while ensuring docking accuracy.

[0004] With respect to the above-mentioned related technologies, the inventor believes that the above-mentioned patent adopts the method of setting a plurality of positioning tubes and positioning columns on the cathode plate and the anode plate for plugging, and setting glue in the positioning tube for fixing, so as to ensure that the cathode plate and the anode plate are accurately positioned and convenient for welding and fixing. However, the volume of the positioning tube is small, and setting the glue wrapped in the containing membrane increases the production difficulty, and the glue is easily damaged and fails, and the practicality is insufficient. Therefore, a metal battery bipolar plate is proposed. Utility Model Content

[0005] In order to solve the problems in the above background technology, the present invention provides a metal battery bipolar plate.

[0006] The utility model adopts the following technical solution: a metal battery bipolar plate, comprising a cathode plate and an anode plate formed by stamping a single layer of metal sheet, a gasket frame being installed between the cathode plate and the anode plate, an oxidant inlet and an oxidant outlet being respectively provided on the cathode plate, an oxidant flow channel being formed by punching out a groove on the front side of the cathode plate, a coolant inlet and a coolant outlet being respectively provided on the anode plate, a coolant flow channel being formed by punching out a groove on the front side of the anode plate, a plurality of connecting blocks being provided on the anode plate, a clamping block being fixedly installed on one side of the connecting block, an installation groove being provided on the cathode plate at a position corresponding to the connecting block, the connecting block and the clamping block being movably connected to the installation groove, a clamping groove being provided on one side of the installation groove, the clamping block being movably connected to the clamping groove, the clamping block limiting the vertical movement of the anode plate relative to the cathode plate when being installed in the clamping groove, and a fixing device for limiting the horizontal movement of the anode plate relative to the cathode plate being also provided on the cathode plate.

[0007] As a preferred embodiment of the present invention, the fixing device includes a headless bolt, a screw hole matching the headless bolt is provided on the cathode plate, and a through limiting hole is provided on the anode plate corresponding to the screw hole, and the headless bolt is installed in the limiting hole and threadedly connected to the screw hole.

[0008] As a preferred embodiment of the present invention, the height of the headless bolt when installed in the screw hole does not exceed the end surface of the anode plate.

[0009] As a preferred embodiment of the present invention, the length of the clamping block is smaller than the length of the installation slot.

[0010] As a preferred embodiment of the present invention, the clamping block is symmetrically provided with an inclined surface at one end facing the mounting groove.

[0011] As a preferred embodiment of the present invention, a through hole is opened on the gasket frame at a position corresponding to the screw hole, the shape and size of the through hole are consistent with the shape of the limiting hole and the shape of the screw hole, and the headless bolt is movably connected to the through hole.

[0012] As a preferred embodiment of the present invention, the fixing device includes the elastic card block, the end of the card block is fixedly installed with a fixing hook, an L-shaped fixing groove is opened on one side of the installation groove, and the fixing hook is snap-fitted into the fixing groove.

[0013] As a preferred embodiment of the present invention, an inwardly inclined surface is provided on one end of the fixing hook facing the fixing groove.

[0014] As a preferred embodiment of the present invention, the height of the clamping block when installed in the mounting groove does not exceed the end surface of the cathode plate.

[0015] As a preferred embodiment of the present invention, a through slot is provided on the gasket frame at a position corresponding to the mounting slot, the shape of the through slot is consistent with the shape of the mounting slot, and the connecting block is movably connected to the through slot.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model is installed in the installation groove through the connecting block, which plays a positioning role for the cathode plate and the anode plate, which is beneficial to the alignment of the cathode plate and the anode plate during welding operation and ensures the accuracy of the fit.

[0018] 2. The utility model fixes the cathode plate and the anode plate by buckling the clamping block into the clamping slot, limiting the vertical movement of the anode plate relative to the cathode plate. At the same time, the horizontal movement of the anode plate is limited by the headless bolt or the fixing hook, so that the anode plate and the cathode plate are initially fixed. The production is simple and the structure is practical, the fixing effect is good, and the welding operation is further facilitated, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded schematic diagram of the overall structure of the first embodiment of the present utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the partial structure of the cathode plate and the anode plate of the first embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of a headless bolt of the present utility model;

[0022] Figure 4 This is an exploded schematic diagram of the overall structure of the second embodiment of the present utility model;

[0023] Figure 5 This is a schematic cross-sectional view of the partial structure of the cathode plate and the anode plate of the second embodiment of the present utility model.

[0024] In the figure: 1. cathode plate; 11. gasket frame; 111. through groove; 112. through hole; 12. oxidant inlet; 13. oxidant outlet; 14. mounting groove; 141. clamping groove; 142. fixing groove; 15. screw hole; 2. anode plate; 21. coolant inlet; 22. coolant outlet; 23. connecting block; 231. clamping block; 232. fixing hook; 24. limiting hole; 241. headless bolt. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0026] Example 1:

[0027] See also Figure 1-5 The utility model provides a metal battery bipolar plate, comprising a cathode plate 1 and an anode plate 2 formed by stamping a single layer of metal sheet, a gasket frame 11 is further installed between the cathode plate 1 and the anode plate 2, an oxidant inlet 12 and an oxidant outlet 13 are respectively opened on the cathode plate 1, and a groove is punched out on the front of the cathode plate 1 to form an oxidant flow channel, a coolant inlet 21 and a coolant outlet 22 are respectively opened on the anode plate 2, and a groove is punched out on the front of the anode plate 2 to form a coolant flow channel, a plurality of connecting blocks 23 are provided on the anode plate 2, a clamping block 231 is fixedly installed on one side of the connecting block 23, and a mounting groove is opened at a position corresponding to the connecting block 23 on the cathode plate 1 14. The connecting block 23 and the clamping block 231 are movably connected to the installation slot 14. A clamping slot 141 is provided on one side of the installation slot 14. The clamping block 231 is movably connected to the clamping slot 141. When the clamping block 231 is installed in the clamping slot 141, it limits the vertical movement of the anode plate 2 relative to the cathode plate 1. A fixing device for limiting the horizontal movement of the anode plate 2 relative to the cathode plate 1 is also installed on the cathode plate 1. After the cathode plate 1 and the anode plate 2 are fitted together and installed, their vertical and horizontal movements are restricted, thereby ensuring the stable fixation of the cathode plate 1 and the anode plate 2, facilitating the fitting and alignment of the cathode plate 1 and the anode plate 2 during welding operations, and ensuring the accuracy of the fitting.

[0028] Please pay attention to Figure 1-3 The fixing device includes a headless bolt 241, a screw hole 15 matching the headless bolt 241 is provided on the cathode plate 1, and a through limiting hole 24 is provided on the anode plate 2 corresponding to the screw hole 15. The headless bolt 241 is installed in the limiting hole 24 and is threadedly connected to the screw hole 15. The headless bolt 241 passes through the limiting hole 24 and is installed in the screw hole 15, so that the cathode plate 1 and the anode plate 2 play a limiting role, limiting the horizontal movement of the anode plate 2 relative to the cathode plate 1, thereby achieving the fixation of the cathode plate 1 and the anode plate 2.

[0029] Please pay attention to Figure 2The height of the headless bolt 241 when installed in the screw hole 15 does not exceed the end face of the anode plate 2. This design prevents the headless bolt 241 from protruding from the surface of the anode plate 2 and affecting the subsequent production and installation.

[0030] Please pay attention to Figure 2 The length of the card block 231 is smaller than the length of the installation slot 14, and the card block 231 is symmetrically provided with an inclined surface at one end facing the installation slot 14. This design facilitates the card block 231 to be inserted into the installation slot 14 more smoothly for installation, thereby improving the convenience of the installation operation.

[0031] Please pay attention to Figure 1 A through hole 112 is provided on the gasket frame 11 at a position corresponding to the screw hole 15. The shape and size of the through hole 112 are consistent with the shape of the limiting hole 24 and the shape of the screw hole 15. The headless bolt 241 is movably connected to the through hole 112.

[0032] Please pay attention to Figure 2 The height of the block 231 when installed in the installation groove 14 does not exceed the end surface of the cathode plate 1. This design prevents the connecting block 23 from protruding from the surface of the cathode plate 1 and affecting the subsequent production and installation.

[0033] Please pay attention to Figure 2 A through slot 111 is provided on the gasket frame 11 at a position corresponding to the mounting slot 14 . The shape of the through slot 111 is consistent with that of the mounting slot 14 . The connecting block 23 is movably connected to the through slot 111 .

[0034] The working principle of the first embodiment of the present invention is as follows:

[0035] During installation, the connecting block 23 and the clamping block 231 on the anode plate 2 are passed through the through slot 111 of the gasket frame 11 and aligned with the mounting slot 14 on the cathode plate 1. When the anode plate 2 and the cathode plate 1 are in contact, the anode plate 2 is moved toward the clamping slot 141. The anode plate 2 drives the connecting block 23 and the clamping block 231 to move, so that the clamping block 231 moves to the clamping slot 141, thereby limiting the vertical movement of the cathode plate 1 and the anode plate 2. At this time, the limiting hole 24 on the anode plate 2 and the gasket frame 1 The through holes 112 on 1 are aligned with the screw holes 15 on the cathode plate 1, and the headless bolt 241 is screwed into the screw hole 15 through the limiting hole 24 and the through hole 112. The lower part of the headless bolt 241 is installed in the screw hole 15, and the upper part of the headless bolt 241 is installed in the limiting hole 24 to limit the anode plate 2, thereby limiting the horizontal movement between the cathode plate 1 and the anode plate 2, ensuring that the cathode plate 1 and the anode plate 2 are accurately aligned and stably fixed, which is convenient for welding operations.

[0036] Example 2:

[0037] Please pay attention to Figure 4-5 The fixing device includes an elastic block 231, and a fixing hook 232 is fixedly installed on the end of the block 231. An L-shaped fixing groove 142 is opened on one side of the mounting groove 14, and the fixing hook 232 is clamped and installed in the fixing groove 142. The fixing hook 232 is clamped in the fixing groove 142, thereby limiting the horizontal movement of the anode plate 2 relative to the cathode plate 1. At the same time, the elastic block plays a limiting role on the cathode plate 1 and the anode plate 2, thereby achieving the fixation of the cathode plate 1 and the anode plate 2.

[0038] Please pay attention to Figure 5 The fixing hook 232 is provided with an inward inclined surface at one end facing the fixing groove 142, which facilitates the inner wall of the installation groove 14 to automatically push the fixing hook 232 to drive the block 231 to bend. When the fixing hook 232 is aligned with the fixing groove 142, the fixing hook 232 automatically rebounds so that the fixing hook 232 is clamped in the fixing groove 142, and the installation operation is simple.

[0039] The present invention replaces the fixing device for limiting the horizontal movement between the cathode plate 1 and the anode plate 2 on the basis of the first embodiment, making the fitting and installation operation of the cathode plate 1 and the anode plate 2 simpler and more convenient. The specific working principle is as follows:

[0040] The connecting block 23 on the anode plate 2, as well as the clamping block 231 and the fixing hook 232, are passed through the through slot 111 of the gasket frame 11 and aligned with the mounting slot 14 on the cathode plate 1 and inserted. When the anode plate 2 is in contact with the cathode plate 1, the anode plate 2 is moved toward the fixing slot 142. The anode plate 2 drives the clamping block 231 and the fixing hook 232 to move toward the fixing slot 142. The inner wall of the mounting slot 14 pushes the fixing hook 232 to move outward to bend the clamping block 231. When the fixing hook 232 is aligned with the fixing slot 142, the clamping block 231 automatically resets and drives the fixing hook 232 to move inward and insert into the fixing slot 142, thereby limiting the vertical and horizontal movement between the cathode plate 1 and the anode plate 2. The installation operation is simpler, more convenient, and more practical.

[0041] The above description of the present invention is illustrative in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A metal battery bipolar plate, comprising a cathode plate (1) and an anode plate (2) formed by stamping a single layer of metal sheet, wherein a gasket frame (11) is further installed between the cathode plate (1) and the anode plate (2), an oxidant inlet (12) and an oxidant outlet (13) are respectively provided on the cathode plate (1), and a groove is punched out on the front surface of the cathode plate (1) to form an oxidant flow channel, and a coolant inlet (21) and a coolant outlet (22) are respectively provided on the anode plate (2), and a groove is punched out on the front surface of the anode plate (2) to form a coolant flow channel, characterized in that: The anode plate (2) is provided with a plurality of connection blocks (23), a clamping block (231) is fixedly mounted on one side of the connection block (23), a mounting groove (14) is provided on the cathode plate (1) at a position corresponding to the connection block (23), the connection block (23) and the clamping block (231) are movably connected to the mounting groove (14), a clamping groove (141) is provided on one side of the mounting groove (14), the clamping block (231) is movably connected to the clamping groove (141), and when the clamping block (231) is mounted in the clamping groove (141), the vertical movement of the anode plate (2) relative to the cathode plate (1) is restricted, and a fixing device for restricting the horizontal movement of the anode plate (2) relative to the cathode plate (1) is also mounted on the cathode plate (1).

2. The metal battery bipolar plate according to claim 1, characterized in that: The fixing device includes a headless bolt (241), a screw hole (15) matching the headless bolt (241) is provided on the cathode plate (1), a through limiting hole (24) is provided at a location on the anode plate (2) corresponding to the screw hole (15), and the headless bolt (241) is installed in the limiting hole (24) and is threadedly connected to the screw hole (15).

3. The metal battery bipolar plate according to claim 2, characterized in that: The height of the headless bolt (241) when installed in the screw hole (15) does not exceed the end surface of the anode plate (2).

4. The metal battery bipolar plate according to claim 3, characterized in that: The length of the clamping block (231) is smaller than the length of the installation slot (14).

5. The metal battery bipolar plate according to claim 4, characterized in that: An end of the clamping block (231) facing the mounting groove (14) is symmetrically provided with an inclined surface.

6. The metal battery bipolar plate according to claim 4, characterized in that: A through hole (112) is provided on the gasket frame (11) at a position corresponding to the screw hole (15); the shape and size of the through hole (112) are consistent with the shape of the limiting hole (24) and the shape of the screw hole (15); and the headless bolt (241) is movably connected to the through hole (112).

7. The metal battery bipolar plate according to claim 1, characterized in that: The fixing device comprises an elastic clamping block (231), an end of the clamping block (231) is fixedly mounted with a fixing hook (232), an L-shaped fixing groove (142) is provided on one side of the mounting groove (14), and the fixing hook (232) is clamped and mounted in the fixing groove (142).

8. The metal battery bipolar plate according to claim 7, characterized in that: An inwardly inclined surface is provided at one end of the fixing hook (232) facing the fixing groove (142); and the height of the clamping block (231) when installed in the installation groove (14) does not exceed the end surface of the cathode plate (1).

9. The metal battery bipolar plate according to claim 8, characterized in that: A through slot (111) is provided on the gasket frame (11) at a position corresponding to the mounting slot (14); the shape of the through slot (111) is consistent with that of the mounting slot (14); and the connecting block (23) is movably connected to the through slot (111).

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