Pressure-fluctuation-resistant electrolytic cell structure

Abstract

The utility model discloses a pressure fluctuation resistant electrolytic bath structure, which relates to the technical field of electrolytic baths, and comprises two opposite end plates, a bipolar plate is arranged between the two end plates, two sides of the bipolar plate are respectively provided with an electrolysis unit, each electrolysis unit comprises two opposite electrode frames, and the two electrode frames are respectively provided with a pressure fluctuation resistant electrode. A diaphragm sealing gasket is installed between the two electrode frames in a matched mode, a diaphragm is installed on the inner side of the diaphragm sealing gasket in a matched mode, the anode support and the cathode support are the same in structure, a plurality of stamping grooves are formed in the anode support, stamping supporting frames are arranged in the stamping grooves, the stamping grooves are evenly distributed in the anode support, and the stamping supporting frames are arranged on the anode support. The cross section of the stamping supporting frame is in a trapezoid arch bridge shape. According to the utility model, the trapezoidal arch-bridge-shaped support frame is stamped on the support plate, so that the maximum contact area among the electrode support, the motor plate and the diaphragm is enlarged, the influence of electrolyte pressure fluctuation on the diaphragm is further reduced, and the service life of the diaphragm is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to an electrolytic cell structure resistant to pressure fluctuations. Background Art

[0002] The initial purity of hydrogen produced by water electrolysis is the highest, the process is simple and mature, and the process has zero carbon emissions. The only difference is that the electricity cost is relatively high. Therefore, vigorously developing renewable energy power generation and hydrogen production is an effective way to reduce electricity costs and achieve true green electricity to green hydrogen production. However, the electricity generated by renewable energy has the disadvantage of volatility. The fluctuation of electric capacity will bring about pressure fluctuations inside the electrolysis equipment. If water electrolysis hydrogen production wants to perfectly couple with renewable energy, the water electrolysis hydrogen production equipment needs to be designed to withstand such pressure fluctuations. The electrolyzer is the core component of the water electrolysis equipment. Its ability to adapt to pressure fluctuations will determine the fluctuation resistance level of the entire system. Therefore, improving the electrolyzer's ability to withstand pressure fluctuations is a prerequisite for the perfect coupling of water electrolysis hydrogen production with renewable energy. The pressure resistance level of the electrolyzer depends entirely on the gas barrier properties of the diaphragm.

[0003] However, after a period of continuous use, the diaphragms used in current electrolytic cells often break due to pressure fluctuations of the electrolyte in the electrolytic cell, causing the electrolytic cell to fail and greatly reducing the time between two maintenance of the electrolytic cell.

[0004] To this end, a pressure fluctuation-resistant electrolytic cell structure is proposed. Utility Model Content

[0005] In order to solve the problem of the diaphragm being damaged after a period of use as mentioned in the background art, the present invention aims to provide an electrolytic cell structure that is resistant to pressure fluctuations.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a pressure fluctuation resistant electrolytic cell structure, comprising two oppositely disposed end plates, a plate sealing gasket disposed between the two end plates, a bipolar plate fitted within the plate sealing gasket, and electrolytic cells disposed on both sides of the bipolar plate;

[0007] The electrolysis unit includes two pole frames arranged opposite to each other, a diaphragm sealing gasket is installed between the two pole frames, a diaphragm is installed on the inner side of the diaphragm sealing gasket, an electrolytic anode and an electrolytic cathode are also installed in the pole frame, an anode support is installed on one side of the electrolytic anode, and a cathode support is installed on one side of the electrolytic cathode. The anode support and the cathode support have the same structure, a plurality of stamping grooves are provided on the anode support, and a stamping support frame is provided in the stamping grooves. The stamping grooves are evenly distributed on the anode support, and the cross-section of the stamping support frame is a trapezoidal arch bridge shape.

[0008] Preferably, the two end plates are connected by a plurality of locking screws and corresponding locking bolts.

[0009] Preferably, the electrolysis anode and the electrolysis cathode are correspondingly installed on both sides of the diaphragm, the side where the electrolysis anode is installed is the anode cavity, and the side where the electrolysis cathode is installed is the cathode cavity.

[0010] Preferably, the anode cavity is connected to the oxygen outlet flow channel through the oxygen branch flow channel, the cathode cavity is connected to the hydrogen outlet flow channel through the hydrogen branch flow channel, and both the anode cavity and the cathode cavity are connected to the electrolyte inlet flow channel through the electrolyte branch flow channel.

[0011] Preferably, the oxygen outlet flow channel, the hydrogen outlet flow channel and the electrolyte inlet flow channel all pass through corresponding end plates.

[0012] Preferably, the diaphragm sealing gasket and the plate sealing gasket are both silicone sealing rings.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The positive and negative electrode supports of the present invention are stamped in a trapezoidal arch bridge-shaped support frame on the support plate. The support plate and the support frame are arranged in parallel, so that the maximum contact area between the electrode support and the motor plate and the diaphragm is increased, so that the electrode support can better support the motor plate and the diaphragm, thereby reducing the impact of electrolyte pressure fluctuations on the diaphragm and effectively extending the service life of the diaphragm.

[0015] 2. The trapezoidal arch bridge-shaped support frame used in the present invention can make the electrolyte flow more smoothly through the electrode support, effectively reduce the pressure fluctuation range of the electrode liquid in the electrolytic cell, reduce the turbulence of the electrolyte in the electrolytic cell, and increase the stability of the electrolytic cell during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a basic structural diagram of a pressure fluctuation resistant electrolytic cell structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the basic structure of the anode support of the present utility model.

[0018] Figure 3 The utility model is a pressure fluctuation resistant electrolytic cell structure Figure 2 Another perspective of the picture.

[0019] Figure 4 The utility model is a pressure fluctuation resistant electrolytic cell structure Figure 2 Cross-sectional view of .

[0020] Figure 5This is a schematic diagram of a stamping method for a pressure fluctuation resistant electrolytic cell structure of the present invention.

[0021] Figure 6 Schematic diagram of the basic structure of the currently used line-contact electrode support before stretching.

[0022] Figure 7 Schematic diagram of the basic structure of the currently used line-contact electrode support after stretching.

[0023] Figure 8 for Figure 7 Cross-sectional view of CC.

[0024] In the figure: 101, end plate; 102, locking screw; 103, pole frame; 104, diaphragm sealing gasket; 105, diaphragm; 106, electrolysis anode; 107, electrolysis cathode; 108, anode support; 109, cathode support; 110, pole plate sealing gasket; 111, bipolar plate; 112, hydrogen outlet flow channel; 113, oxygen outlet flow channel; 114, electrolyte inlet flow channel; 115, electrolysis unit; 116, anode cavity; 117, cathode cavity; 118, oxygen branch flow channel; 119, hydrogen branch flow channel; 120, electrolyte branch flow channel; 201, stamping groove; 202, stamping support frame. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-5As shown, this embodiment provides a pressure fluctuation resistant electrolytic cell structure, including two oppositely arranged end plates 101, a plate sealing gasket 110 is provided between the two end plates 101, a bipolar plate 111 is installed in the plate sealing gasket 110, and an electrolysis unit 115 is provided on both sides of the bipolar plate 111. The electrolysis unit 115 includes two oppositely arranged pole frames 103, a diaphragm sealing gasket 104 is installed between the two pole frames 103, and a diaphragm 105 is installed inside the diaphragm sealing gasket 104. An electrolytic anode 106 and an electrolytic cathode 107 are also installed in the frame 103. An anode support 108 is installed on one side of the electrolytic anode 106, and a cathode support 109 is installed on one side of the electrolytic cathode 107. The anode support 108 and the cathode support 109 have the same structure. A plurality of stamping grooves 201 are provided on the anode support 108, and a stamping support frame 202 is provided in the stamping grooves 201. The stamping grooves 201 are evenly distributed on the anode support 108, and the cross-section of the stamping support frame 202 is a trapezoidal arch bridge shape.

[0027] In this embodiment, the trapezoidal arch bridge-shaped support frame can make the electrolyte flow through the electrode support more smoothly, effectively reduce the pressure fluctuation range of the electrode liquid in the electrolytic cell, reduce the turbulence of the electrolyte in the electrolytic cell, increase the stability of the electrolytic cell during operation, and thus make the operation of the electrolytic cell more stable, effectively reducing the interval time between two maintenances.

[0028] The two end plates 101 are connected by a number of locking screws 102 and corresponding 1 locking bolts. The electrolytic anode 106 and the electrolytic cathode 107 are correspondingly installed on both sides of the diaphragm 105. The side where the electrolytic anode 106 is installed is the anode cavity 116, and the side where the electrolytic cathode 107 is installed is the cathode cavity 117. The anode cavity 116 is connected to the oxygen outlet flow channel 113 through the oxygen branch channel 118, and the cathode cavity 117 is connected to the hydrogen outlet flow channel 112 through the hydrogen branch channel 119. The anode cavity 116 and the cathode cavity 117 are both connected to the electrolyte inlet flow channel 114 through the electrolyte branch channel 120. The oxygen outlet flow channel 113, the hydrogen outlet flow channel 112 and the electrolyte inlet flow channel 114 all pass through the corresponding end plates 101. The diaphragm sealing gasket 104 and the plate sealing gasket 110 are both silicone sealing rings.

[0029] Reference Figure 6-8 As shown in the three figures, the electrode support structure currently used is shown. Figure 6 , open several transparent incisions a on the electrode support plate, and then pull the two ends of the electrode support plate (the pulling direction refers to the white arrow in the figure), refer to Figure 7 , which is a schematic diagram of the structure after the electrode support plate is pulled apart (a is Figure 5 The cutouts in the Figure 8 , the figure is Figure 6CC cross-sectional view, after the electrode support plate is stretched, a mesh structure is formed (B1 in the figure is the highest burr point formed after the electrode support plate is stretched, and B2 is the lowest burr point formed after the electrode support plate is stretched). The burrs are formed at Figure 6 The incision step is formed by cutting the cutting blade. Figure 8 In the structure, the sharp points B1 and B2 are more likely to damage the diaphragm 105.

[0030] In this embodiment, the electrode support plate is made by stamping, and the stamping direction is the same as that of the reference plate. Figure 5 The black arrows in the figure are in the same direction. In the figure, d1 and d3 are the two sides that are in contact with the electrode plate and the diaphragm 105. There are no burrs on these sides. D2 and d4 are the positions where burrs will be formed during stamping, but these positions do not contact the electrode plate and the diaphragm 105, thereby greatly improving the service life of the motor support plate and effectively preventing damage to the diaphragm 105.

[0031] It should be noted that the positive and negative electrode supports of the present invention are stamped in a trapezoidal arch bridge-shaped support frame stamped out on the support plate, and the support plate and the support frame are arranged in parallel, so that the maximum contact area between the electrode support and the motor plate and the diaphragm 105 becomes larger, so that the electrode support can better support the motor plate and the diaphragm 105, thereby reducing the impact of electrolyte pressure fluctuations on the diaphragm 105, and effectively extending the service life of the diaphragm 105. The trapezoidal arch bridge-shaped support frame used in the present invention can make the electrolyte flow through the electrode support more smoothly, effectively reduce the pressure fluctuation range of the electrode liquid in the electrolytic cell, reduce the turbulence of the electrolyte in the electrolytic cell, and increase the stability of the electrolytic cell during operation.

[0032] In this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure fluctuation resistant electrolytic cell structure, characterized by: The invention comprises two end plates (101) arranged opposite to each other, a plate sealing gasket (110) being provided between the two end plates (101), a bipolar plate (111) being fitted in the plate sealing gasket (110), and electrolysis units (115) being provided on both sides of the bipolar plate (111); The electrolysis unit (115) comprises two pole frames (103) arranged opposite to each other, a diaphragm sealing gasket (104) being installed between the two pole frames (103), a diaphragm (105) being installed inside the diaphragm sealing gasket (104), an electrolysis anode (106) and an electrolysis cathode (107) being installed inside the pole frame (103), an anode support (108) being installed on one side of the electrolysis anode (106), and a cathode support (109) being installed on one side of the electrolysis cathode (107), the anode support (108) and the cathode support (109) having the same structure, a plurality of stamping grooves (201) being provided on the anode support (108), a stamping support frame (202) being provided in the stamping grooves (201), the stamping grooves (201) being evenly distributed on the anode support (108), and the cross section of the stamping support frame (202) being in the shape of a trapezoidal arch bridge.

2. The pressure fluctuation resistant electrolytic cell structure according to claim 1, characterized in that: The two end plates (101) are connected via a plurality of locking screws (102) in cooperation with corresponding locking bolts.

3. The pressure fluctuation resistant electrolytic cell structure according to claim 1, characterized in that: The electrolysis anode (106) and the electrolysis cathode (107) are correspondingly installed on both sides of the diaphragm (105), the side where the electrolysis anode (106) is installed is the anode cavity (116), and the side where the electrolysis cathode (107) is installed is the cathode cavity (117).

4. The pressure fluctuation resistant electrolytic cell structure according to claim 3, characterized in that: The anode chamber (116) is connected to the oxygen outlet flow channel (113) through the oxygen branch flow channel (118), the cathode chamber (117) is connected to the hydrogen outlet flow channel (112) through the hydrogen branch flow channel (119), and the anode chamber (116) and the cathode chamber (117) are both connected to the electrolyte inlet flow channel (114) through the electrolyte branch flow channel (120).

5. The pressure fluctuation resistant electrolytic cell structure according to claim 4, characterized in that: The oxygen outlet flow channel (113), the hydrogen outlet flow channel (112) and the electrolyte inlet flow channel (114) all pass through the corresponding end plates (101).

6. The pressure fluctuation resistant electrolytic cell structure according to claim 1, characterized in that: The diaphragm sealing gasket (104) and the plate sealing gasket (110) are both silicone sealing rings.

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