Stack pole plate and frame of PEM electrolytic bath

Abstract

The utility model relates to the technical field of electrolytic baths, in particular to an electric pile polar plate and frame of a PEM electrolytic baths, which comprises a frame body, a flange, a baffle, a guide rail, a plug and a connecting seat, the frame body provides an installation condition for the flange, when the polar plate is installed on the frame body, a worker slides the baffle towards one side far away from the connecting seat by hand, and an installation groove between the baffle and the flange is exposed; at the moment, the worker pushes the polar plate into the mounting groove with the hand and pushes the baffle to the connecting seat until the baffle abuts against the flange and the plug is inserted into the connecting seat, and at the moment, the connecting seat and the plug are clamped, so that the baffle and the flange are fixed, the polar plate is mounted, the guide rail is arranged, the baffle is guided and limited, and the baffle is prevented from deviating during sliding; according to the frame, the polar plates are positioned through the baffles and the flanges, so that the mounting stability of the polar plates is guaranteed, and the phenomenon that the polar plates are loosened is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to a stack plate and a frame of a PEM electrolytic cell. Background Art

[0002] The main technologies for hydrogen production by electrolysis of water include alkaline water electrolyzer (AE), proton exchange membrane water electrolyzer (PEM) and solid oxide water electrolyzer (SOE). Among them, the proton exchange membrane water electrolyzer has high energy efficiency and a simple hydrogen production process, but the disadvantage is that it uses precious metal electrocatalysts, resulting in high costs. As the technology gradually develops, the cost is on a downward trend. The stack plate of the proton exchange membrane electrolyzer, also known as the bipolar plate, is a multifunctional element in the proton exchange membrane electrolyzer. It has two basic functions: one is to electrically connect to the adjacent cells in the stack; the other is to supply and remove reactants (i.e., water) and gaseous products (i.e., hydrogen and oxygen). The reaction flow field is an important component of the stack plate, which is used to generate a uniformly distributed flow field on the proton exchange membrane catalytic electrode. If the reaction flow field on the stack plate is unevenly distributed, it may lead to uneven use of the catalyst material of the catalytic electrode, and the overall efficiency of the proton exchange membrane electrolyzer is low; in addition, the temperature difference from the inlet to the outlet in the proton exchange membrane electrolyzer is too large, which will also reduce the overall reaction efficiency.

[0003] At present, the prior art CN219861604U discloses a stack plate and frame of a PEM electrolyzer, which relates to the technical field of PEM electrolyzers, wherein the stack plate includes an anode plate and a cathode plate, wherein an anode reaction flow field is arranged on one side of the anode plate, wherein the anode reaction flow field includes a first flow field reaction zone, wherein a first parallel flow field distributed transversely along the anode plate is arranged in the first flow field reaction zone; wherein a cathode reaction flow field is arranged on one side of the cathode plate, wherein the cathode reaction flow field includes a second flow field reaction zone, wherein a second parallel flow field distributed longitudinally along the cathode plate is arranged in the second flow field reaction zone; wherein a frame of a PEM electrolyzer forms a hollow area in the middle of the frame. The first parallel flow field of the utility model is distributed transversely, and the second parallel flow field is distributed longitudinally, in a perpendicular state, and the fluid in the flow channel of the first parallel flow field and the second parallel flow field exchanges heat during the transmission process, so that the temperature in the electrolyzer is stable, and no additional cooling measures are required, and the thermal management efficiency is high.

[0004] However, when the stacked plates are installed on the frame, they are usually connected and fixed by long rods between the fixing brackets without positioning the plates. The stability of the plate installation is poor and the plates are easily loosened. Utility Model Content

[0005] The utility model aims to provide a stack plate and frame of a PEM electrolyzer, aiming to solve the problem that the stack plate frame of the existing electrolyzer has poor stability in installing the stack plate and is prone to loosening of the plate.

[0006] To achieve the above-mentioned objectives, in a first aspect, the utility model provides a stack plate frame of a PEM electrolyzer, comprising a frame, a rib, a baffle, a guide rail, a plug and a connecting seat; the rib is fixedly connected to the frame and is located on one side of the frame, the guide rail is fixedly connected to the frame and is located on a side of the frame close to the rib, the rib is slidably connected to the guide rail and is located in the guide rail, the plug is fixedly connected to the baffle and is located on one side of the baffle, and the connecting seat is fixedly connected to the rib, is clamped with the plug, and is located on one side of the rib.

[0007] The stack plate frame of the PEM electrolyzer also has a sealing gasket, and the sealing gasket and the frame are close to the side of the baffle.

[0008] Among them, the connecting seat includes a base, a fixing bolt and a spring, the base is fixedly connected to the retaining edge and is located on one side of the retaining edge, the spring is fixedly connected to the base and is located inside the base, the fixing bolt is fixedly connected to the spring, slidably connected to the base, and is located inside the base.

[0009] In a second aspect, the utility model further provides a stack plate of a PEM electrolyzer, wherein the stack plate is arranged on one side of the rib and the baffle.

[0010] Among them, the stack plate includes a plate body and a handle, the plate body is slidably connected to the retaining edge and is located inside the retaining edge, and the handle is fixedly connected to the plate body and is located on the side of the plate body away from the sealing gasket.

[0011] Wherein, the stack plate also includes a sealing ring and an anti-skid layer, the sealing ring is fixedly connected to the plate body and is located on one side of the plate body, and the anti-skid layer is fixedly connected to the sealing ring and is located on one side of the sealing ring.

[0012] The utility model discloses a stack plate frame of a PEM electrolyzer. When installing the plate on the frame, the worker slides the baffle plate to the side away from the connecting seat with his hands to expose the installation groove between the baffle plate and the retaining edge. At this time, the worker pushes the plate into the installation groove with his hands again, and pushes the baffle plate toward the connecting seat until the baffle plate is against the retaining edge and the plug stops when inserted into the connecting seat. At this time, the connecting seat and the plug are engaged to complete the fixation of the baffle plate and the retaining edge, and the installation of the plate is realized. The guide rail is provided to guide and limit the baffle plate to avoid the baffle plate from deviating when sliding, which causes the plug to be unable to be smoothly inserted into the connecting seat. The frame positions the plate by the baffle plate and the retaining edge, thereby ensuring the stability of the plate installation and avoiding the occurrence of loose plate. The problem that the stack plate frame of the existing electrolyzer has poor stability in installing the stack plate and is prone to loose plate is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 The utility model is a schematic structural diagram of a stack plate frame of a PEM electrolyzer.

[0015] Figure 2 It is a connection schematic diagram of the plug and the connecting seat of the utility model.

[0016] Figure 3 The utility model is a schematic diagram of the structure of a PEM electrolytic cell stack plate.

[0017] Figure 4 The utility model is a schematic diagram of the connection between the stack plate and the frame of a PEM electrolyzer.

[0018] In the figure: 101-frame, 102-rib, 103-baffle, 104-guide rail, 105-plug, 106-connecting seat, 107-sealing pad, 108-base, 109-fixing bolt, 110-spring, 201-stack plate, 202-plate body, 203-handle, 204-sealing ring, 205-anti-slip layer. DETAILED DESCRIPTION

[0019] In the first aspect, the utility model provides a stack plate frame of a PEM electrolyzer, see Figure 1-Figure 2 , Figure 1 It is a structural schematic diagram of the utility model. Figure 2It is a connection diagram of the plug and the connecting seat of the utility model, including a frame 101, a rib 102, a baffle 103, a guide rail 104, a plug 105 and a connecting seat 106; the frame of the stack plate 201 of the PEM electrolyzer also has a sealing gasket 107, and the connecting seat 106 includes a base 108, a fixing bolt 109 and a spring 110. The above-mentioned scheme solves the problem that the stack plate 201 frame of the existing electrolyzer has poor stability when installed, which easily causes the plate to loosen. It can be understood that the above-mentioned scheme can be used in the scenario where the stack plate is installed in the electrolyzer.

[0020] According to this specific embodiment, the retaining edge 102 is fixedly connected to the frame 101 and is located on one side of the frame 101, the guide rail 104 is fixedly connected to the frame 101 and is located on a side of the frame 101 close to the retaining edge 102, the retaining edge 102 is slidably connected to the guide rail 104 and is located in the guide rail 104, the plug 105 is fixedly connected to the baffle 103 and is located on one side of the baffle 103, the connecting seat 106 is fixedly connected to the retaining edge 102, is engaged with the plug 105, and is located on one side of the retaining edge 102, when the frame 101 is installed with a plate, a worker uses his hand to slide the baffle 103 to a side away from the connecting seat 106, exposing the installation groove between the baffle 103 and the retaining edge 102, and then the worker uses his hand to push the plate The baffle 103 is inserted into the installation groove, and the baffle 103 is pushed toward the connecting seat 106 until the baffle 103 is against the retaining edge 102, and the plug 105 stops when inserted into the connecting seat 106. At this time, the connecting seat 106 and the plug 105 are engaged, completing the fixation of the baffle 103 and the retaining edge 102, and realizing the installation of the plate. The guide rail 104 is provided for guiding and limiting the baffle 103 to avoid the baffle 103 from deflecting when sliding, resulting in the plug 105 being unable to be smoothly inserted into the connecting seat 106. The frame positions the plate through the baffle 103 and the retaining edge 102, thereby ensuring the stability of the plate installation and avoiding the occurrence of loose plates. This solves the problem that the frame of the stack plate 201 of the existing electrolytic cell has poor stability in installing the stack plate 201, which is easy to cause loose plates.

[0021] The sealing gasket 107 and the frame 101 are close to the baffle 103 . The provision of the sealing gasket 107 increases the sealing between the frame 101 and the electrode plate, thereby preventing the electrolyte from leaking from the connection between the frame 101 and the electrode plate.

[0022] Secondly, the base 108 is fixedly connected to the retaining edge 102 and is located on one side of the retaining edge 102. The spring 110 is fixedly connected to the base 108 and is located in the base 108. The fixing bolt 109 is fixedly connected to the spring 110 and is slidably connected to the base 108 and is located in the base 108. The fixing bolt 109 is hemispherical on the side away from the spring 110. The plug 105 has a through hole. When the plug 105 is inserted into the base 108, the plug 105 first The fixing bolt 109 is squeezed to make it retract in the base 108 and compress the spring 110. When the baffle 103 abuts against the retaining edge 102, the plug 105 is also fully inserted into the base 108. At this time, the through hole on the plug 105 is aligned with the fixing bolt 109. The spring 110 is reset to push the fixing bolt 109 into the plug 105, so as to realize the clamping connection between the fixing bolt 109 and the plug 105, and complete the fixation of the baffle 103 and the retaining edge 102.

[0023] When the frame 101 is installing the plate, the worker uses his hand to slide the baffle 103 to the side away from the base 108 to expose the installation groove between the baffle 103 and the retaining edge 102. At this time, the worker uses his hand to push the plate into the installation groove and pushes the baffle 103 toward the base 108, so that the plug 105 is inserted into the base 108 to squeeze the fixing bolt 109, so that the fixing bolt 109 retracts in the base 108 and compresses the spring 110 until the baffle 103 is against the retaining edge 102 and the plug 105 is also fully inserted into the base 108. At this time, the through hole on the plug 105 is aligned with the fixing bolt 109, and the spring 110 is reset to push the fixing bolt 109 into the plug 105. At this time, the base 108 and the plug 105 are engaged, completing the fixation of the baffle 103 and the retaining edge 102, and realizing the installation of the plate.

[0024] In a second aspect, the present invention further provides a stack plate of a PEM electrolyzer. Based on the first aspect, refer to Figure 3-Figure 4 , Figure 3 It is a structural schematic diagram of the utility model. Figure 4 It is a schematic diagram of the connection between the stack plate and the frame of the utility model. The stack plate of the PEM electrolyzer of the present invention includes a plate body 202 and a handle 203 , and the stack plate 201 also includes a sealing ring 204 and an anti-slip layer 205 .

[0025] According to this specific embodiment, the stack plate 201 is arranged on one side of the retaining edge 102 and the baffle 103, and the stack plate 201 is used in conjunction with the frame of the first aspect. The stack plate 201 includes an anode plate and a cathode plate, and the stack plate 201, one side of the anode plate is provided with an anode reaction flow field, the anode reaction flow field includes a first inlet, a first inflow area, a first flow field reaction area, a first outflow area and a first outlet connected in sequence, a first parallel flow field distributed along the transverse direction of the anode plate is provided in the first flow field reaction area, and the first parallel flow field includes a plurality of flow channels distributed side by side, The first inlet and the first outlet both penetrate the anode plate along the thickness direction of the anode plate; a cathode reaction flow field is arranged on one side of the cathode plate, and the cathode reaction flow field includes a second inlet, a second inflow area, a second flow field reaction area, a second outflow area and a second outlet which are connected in sequence; a second parallel flow field is arranged in the second flow field reaction area along the longitudinal direction of the cathode plate, and the second parallel flow field includes a plurality of flow channels distributed side by side; the second inlet and the second outlet both penetrate the cathode plate along the thickness direction of the cathode plate; a plurality of anode reaction flow fields are adjacently arranged on the anode plate, and a plurality of cathode reaction flow fields are adjacently arranged on the cathode plate.

[0026] Among them, the plate body 202 is slidably connected to the retaining edge 102 and is located inside the retaining edge 102. The handle 203 is fixedly connected to the plate body 202 and is located on the side of the plate body 202 away from the sealing gasket 107. The plate body 202 is used in conjunction with the frame of the first aspect and provides installation conditions for the handle 203. The design of the handle 203 makes it easy to pull out the plate body 202 from the frame when it is corroded and damaged in the later stage, thereby improving practicality.

[0027] Secondly, the sealing ring 204 is fixedly connected to the electrode body 202 and is located on one side of the electrode body 202. The anti-skid layer 205 is fixedly connected to the sealing ring 204 and is located on one side of the sealing ring 204. The setting of the sealing ring 204 is used to improve the air tightness at the inlet and outlet of the electrode body 202. The surface of the anti-skid layer 205 is provided with protective patterns, which enhances the stability of the connection between the inlet and outlet of the electrode body 202 and the pipeline.

[0028] When the electrode plate body 202 is used, the electrode plate body 202 is pushed into the retaining edge 102 , and the retaining plate 103 retains the electrode plate body 202 therein.

[0029] What is disclosed above is only a preferred embodiment of the stack plate and frame of a PEM electrolyzer of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A stack plate frame of a PEM electrolyzer, characterized in that: It includes a frame, a rib, a baffle, a guide rail, a plug and a connecting seat; The retaining edge is fixedly connected to the frame and is located at one side of the frame, the guide rail is fixedly connected to the frame and is located at a side of the frame close to the retaining edge, the retaining edge is slidably connected to the guide rail and is located in the guide rail, the plug is fixedly connected to the baffle and is located at one side of the baffle, and the connecting seat is fixedly connected to the retaining edge, is clamped with the plug, and is located at one side of the retaining edge.

2. A stack plate frame for a PEM electrolyzer as claimed in claim 1, characterized in that: The stack plate frame of the PEM electrolyzer also has a sealing gasket, and the sealing gasket and the frame are close to the side of the baffle.

3. A stack plate frame for a PEM electrolyzer as claimed in claim 2, characterized in that: The connecting seat includes a base, a fixing bolt and a spring. The base is fixedly connected to the retaining edge and is located on one side of the retaining edge. The spring is fixedly connected to the base and is located inside the base. The fixing bolt is fixedly connected to the spring and is slidably connected to the base and is located inside the base.

4. A stack plate of a PEM electrolyzer, applied to a stack plate frame of a PEM electrolyzer as claimed in claim 3, characterized in that: The stack plate is arranged on one side of the rib and the baffle.

5. A stack plate for a PEM electrolyzer as claimed in claim 4, characterized in that: The stack plate comprises a plate body and a handle, wherein the plate body is slidably connected to the retaining edge and is located inside the retaining edge, and the handle is fixedly connected to the plate body and is located on a side of the plate body away from the sealing gasket.

6. A stack plate for a PEM electrolyzer as claimed in claim 5, characterized in that: The stack plate also includes a sealing ring and an anti-skid layer. The sealing ring is fixedly connected to the plate body and is located on one side of the plate body. The anti-skid layer is fixedly connected to the sealing ring and is located on one side of the sealing ring.

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