Stacking tool and stacking method for bipolar plates of alkaline electrolytic cell

Abstract

According to the stacking tool and method for the bipolar plate of the alkaline electrolytic cell, the stacking tool is a surrounding cylinder and comprises a plurality of tool rings which are arranged in a stacked mode, upper flanges and lower flanges of the tool rings are located in a positioning pin and connected and locked through bolts, and longitudinal rib plates arranged in the length direction of a connecting rod are arranged on the outer wall of the connecting rod; a transverse rib plate is arranged between every two adjacent longitudinal rib plates, positioning grooves formed in the length direction of the connecting rods are formed in the inner sides of the connecting rods, anti-collision nylon plates are arranged in the positioning grooves, the corresponding connecting rod positioning grooves of every two adjacent tool rings are communicated with each other, each tool ring is formed by connecting a plurality of arc-shaped units end to end, and the longitudinal rib plates of every two adjacent arc-shaped units are connected and locked through bolts. Through the assistance of the tool, the stacking quality is improved, the stacking efficiency is improved, and the stacking cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water electrolysis, and in particular to a bipolar plate stacking tool and a stacking method for an alkaline electrolytic cell. Background Art

[0002] The proportion of clean energy and renewable energy will gradually increase, especially the richness and expansion of hydrogen energy application scenarios, such as natural gas ammonia, hydrogen-based steelmaking, hydrogen energy transportation and other incremental markets, and the cost of green electricity hydrogen production has entered a rapid decline channel. As a result, water electrolysis hydrogen production equipment is gradually becoming large-scale, especially alkaline water electrolysis hydrogen production equipment, and alkaline re-lysis cells of 1,000 cubic meters and above have become the mainstream products in the market.

[0003] At present, the stacking of electrolytic cells uses three round bars to form a triangle positioning along the three points of the circumference of the electrolytic cell bipolar plate, and after stacking a certain number of plates, three excimer levels are used to correct the three-way stacking position deviation. The existing electrolytic cell stacking technology has a large amount of manual operation, complicated procedures and many human factors, and the quality is very uncontrollable when determining the stacking deviation. At the same time, this method can be applied to test prototypes and small-batch production, but it cannot adapt to the industrial mass production of electrolytic cells. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a bipolar plate stacking tool and a stacking method for an alkaline electrolytic cell, the stacking quality is improved, the stacking efficiency is improved, and the stacking cost is reduced.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a bipolar plate stacking tool for alkaline electrolytic cells, the stacking tool is an embracing cylinder, which includes a plurality of tooling rings stacked on each other, the tooling rings are in a circular ring shape, and the diameter and height of each layer of tooling rings are the same. The tooling rings include a lower flange, an upper flange, a plurality of connecting rods uniformly distributed between the upper flange and the lower flange, and an arc-shaped side plate arranged between adjacent connecting rods. The lower flange is provided with a lower mounting hole, the upper flange is provided with an upper mounting hole, and the upper flanges and lower flanges of adjacent tooling rings are connected by positioning pins. The connecting rod is arranged in the position and locked by bolt connection. The outer wall of the connecting rod is provided with a longitudinal rib plate arranged along its length direction, and a transverse rib plate is arranged between adjacent longitudinal rib plates. The transverse rib plate is fitted with the outer wall of the arc-shaped side plate. The arc-shaped side plate is provided with a weight-reducing hole between the longitudinal rib plate and the transverse rib plate. The inner side of the connecting rod is provided with a positioning groove arranged along its length direction. The positioning groove is provided with an anti-collision nylon plate. The connecting rod positioning grooves corresponding to adjacent tooling rings are interconnected. The tooling ring is formed by connecting a number of arc units end to end, and the longitudinal rib plates of adjacent arc units are connected and locked by bolt connection. Principle of the present invention: The stacking deviation is controlled by tooling to avoid the influence of uncontrollable factors of human identification. The stacking deviation is guaranteed by the tooling. During the process, the stacking workers do not need to check and inspect the deviation of the stacked bipolar plates, which reduces the stacking process and the verification process, greatly improving the stacking efficiency and meeting the needs of large-scale production. The three-way laser instrument and stacking positioning rod used in the current stacking technology can be eliminated; at the same time, since the stacking process is simplified and the stacking procedures are shortened, the cost of production auxiliary materials and labor costs are reduced.

[0006] As an improvement, the bottommost tooling ring is connected to the end pressure plate of the electrolytic cell via a positioning pin.

[0007] As an improvement, the anti-collision nylon plate is fixed in the positioning groove of the connecting rod by bolts.

[0008] As an improvement, the tooling ring is formed by connecting three arc-shaped units end to end, and each arc-shaped unit is provided with a connecting rod.

[0009] The stacking method of the present invention comprises the following steps: (1) Assemble the tooling rings. Each layer of tooling rings is processed to ensure the flatness and parallelism of the installation surface and to ensure that the manufacturing error meets the production requirements of the electrolyzer; (2) Stacking a corresponding number of tooling rings according to design requirements to meet the number of bipolar plate stacking requirements; (3) The stacking tool is lifted and fixed vertically on the pressure plate at the end of the electrolytic cell, and the pressure plate at the end of the electrolytic cell and the stacking tool form a cylindrical stacking space; (4) The bipolar plates, electrodes, diaphragms and sealing gaskets are placed in the stacking space in sequence, and the protrusions on the outer sides of the bipolar plates are matched with the positioning grooves; (5) After the number of stacked bipolar plates meets the requirement, the stacking tooling is removed, and another electrolytic cell end pressure plate is placed on the top of the stacked bipolar plates. The upper and lower electrolytic cell end pressure plates are connected by bolts, and the two electrolytic cell end pressure plates press and fix the bipolar plates between them.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. Control the stacking deviation through tooling to avoid the influence of uncontrollable factors of human identification; 2. The stacking deviation is guaranteed by the tooling. During the process, the stacking workers do not need to check and inspect the deviation of the stacked bipolar plates, which reduces the stacking and verification processes, greatly improves the stacking efficiency, and meets the needs of large-scale production; 3. The three-way laser instrument and stacking positioning rod used in the current stacking technology can be eliminated; at the same time, the stacking process is simplified and the stacking process is shortened, so the cost of production auxiliary materials and labor costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the usage status diagram of this stacking tooling.

[0012] Figure 2 Schematic diagram of a single-layer tooling ring.

[0013] Figure 3 This is a top view of the tooling ring.

[0014] Figure 4 for Figure 3 Enlarged view of point A.

[0015] Figure 5 Exploded view of the tooling ring. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figures 1 to 5As shown, a bipolar plate stacking tool for an alkaline electrolytic cell is provided. According to the cylindrical structure of the alkaline electrolytic cell, the stacking tool is an embracing cylinder 1; according to the designed total length of the electrolytic cell, the tool is designed as a multi-layered structure, which can be adjusted according to the length of the electrolytic cell. The tooling of the present invention is provided with a total of three layers of tooling rings 11 stacked on each other, the tooling rings 11 are in a circular shape, and the diameter and height of each layer of tooling rings 11 are the same. The tooling ring 11 comprises a lower flange 113, an upper flange 112, a plurality of connecting rods 116 uniformly distributed between the upper flange 112 and the lower flange 113, and an arc-shaped side plate 117 arranged between adjacent connecting rods 116; the lower flange 113 is provided with a lower mounting hole, the upper flange 112 is provided with an upper mounting hole, and the upper flanges 112 and the lower flanges 113 of adjacent tooling rings 11 are positioned by positioning pins and are connected and locked by bolts; the outer wall of the connecting rod 116 is provided with a longitudinal rib plate 114 arranged along its length direction, and a transverse rib plate 115 is provided between adjacent longitudinal rib plates 114, and the transverse rib plate 115 is in contact with the outer wall of the arc-shaped side plate 117, and the longitudinal rib plate 114 and the transverse rib plate 115 are in contact with the outer wall of the arc-shaped side plate 117, and the longitudinal rib plate 114 and the transverse rib plate 115 are connected. The overall structural strength of the tooling can be enhanced, deformation of the tooling can be prevented, and stacking accuracy can be improved; a weight-reducing hole is provided on the arc-shaped side plate 117 between the longitudinal rib plate 114 and the transverse rib plate 115, and the weight-reducing hole can reduce the overall weight of the tooling, and the stacking condition in the tooling can be observed through the weight-reducing hole; a positioning groove 118 is provided on the inner side of the connecting rod 116 along its length direction, and an anti-collision nylon plate 119 is provided in the positioning groove 118 of the connecting rod 116, and the anti-collision nylon plate 119 is fixed in the positioning groove 118 of the connecting rod 116 by bolts to ensure that the bipolar plate is not damaged by collision with the stacked metal; the connecting rod 116 positioning grooves 118 corresponding to adjacent tooling rings 11 are connected to each other, and the bipolar plates 3 can be stacked into the tooling in sequence. Each tooling ring 11 is also formed by splicing. The tooling ring 11 is formed by connecting three arc units 111 with the same curvature end to end. The longitudinal ribs 114 of adjacent arc units 111 are connected and locked by bolts. Each arc unit 111 is provided with a connecting rod 116. Three positioning grooves 118 are provided in the tooling, and three protrusions are provided on the outer side of the corresponding bipolar plate 3 to realize the positioning of the bipolar plate 3 in three directions.

[0018] like Figure 1 As shown, the bipolar plate stacking method of the present invention comprises the following steps: (1) Assembling the tooling ring 11, and processing each layer of the tooling ring 11 to ensure the flatness and parallelism of the installation surface, and to ensure that the manufacturing error meets the production requirements of the electrolytic cell; (2) stacking a corresponding number of tooling rings 11 according to design requirements to meet the number of bipolar plates 3 to be stacked; (3) The stacking tooling is lifted and fixed upright on the electrolytic cell end pressure plate 2, the bottom tooling ring is connected to the electrolytic cell end pressure plate through positioning pins, and the electrolytic cell end pressure plate 2 and the stacking tooling form a cylindrical stacking space 4; (4) The bipolar plate 3, the electrode, the diaphragm and the sealing gasket are sequentially placed in the stacking space 4, and the protrusions on the outer side of the bipolar plate 3 are matched with the positioning grooves 118; (5) After the number of stacked bipolar plates 3 meets the requirement, the stacking tooling is removed, and another electrolytic cell end pressing plate 2 is placed on top of the stacked bipolar plates 3. The upper and lower electrolytic cell end pressing plates 2 are connected by bolts, and the two electrolytic cell end pressing plates 2 press and fix the bipolar plates 3 between them.

[0019] Principle of the present invention: Control of stacking deviation is achieved through tooling to avoid the influence of uncontrollable factors of human identification. The stacking deviation is guaranteed by tooling, and the stacking workers do not need to calibrate and check the deviation of the stacked bipolar plates 3 during the process, which reduces the stacking process and the calibration process, greatly improving the stacking efficiency and meeting the needs of large-scale production. The three-way laser instrument and stacking positioning rod used in the current stacking technology can be eliminated; at the same time, since the stacking process is simplified and the stacking process is reduced, the cost of production auxiliary materials and labor costs are reduced.

Claims

1. A bipolar plate stacking tool for alkaline electrolytic cells, characterized in that: The stacked tooling is an embracing cylinder, which includes several tooling rings stacked on each other. The tooling ring is in a circular ring shape, and the diameter and height of each layer of tooling rings are the same. The tooling ring includes a lower flange, an upper flange, several connecting rods uniformly distributed between the upper flange and the lower flange, and an arc-shaped side plate arranged between adjacent connecting rods. The lower flange is provided with a lower mounting hole, and the upper flange is provided with an upper mounting hole. The upper flange and the lower flange of adjacent tooling rings are positioned in position by positioning pins and are connected and locked by bolts. The outer wall of the connecting rod is provided with a longitudinal rib plate arranged along its length direction, and a transverse rib plate is provided between adjacent longitudinal rib plates. The transverse rib plate is fitted with the outer wall of the arc-shaped side plate, and a weight reduction hole is provided on the arc-shaped side plate between the longitudinal rib plate and the transverse rib plate. The inner side of the connecting rod is provided with a positioning groove arranged along its length direction, and an anti-collision nylon plate is provided in the positioning groove. The connecting rod positioning grooves corresponding to adjacent tooling rings are connected to each other, and the tooling ring is formed by connecting a plurality of arc-shaped units end to end, and the longitudinal rib plates of adjacent arc-shaped units are connected and locked by bolts.

2. The bipolar plate stacking tool for alkaline electrolytic cells according to claim 1, characterized in that: The bottommost tooling ring is connected to the end pressure plate of the electrolytic cell through positioning pins.

3. The bipolar plate stacking tool for alkaline electrolytic cell according to claim 1, characterized in that: The anti-collision nylon plate is fixed in the positioning groove of the connecting rod by bolts.

4. The bipolar plate stacking tool for alkaline electrolytic cell according to claim 1, characterized in that: The tooling ring is formed by connecting three arc-shaped units end to end, and each arc-shaped unit is provided with a connecting rod.

5. The stacking method for bipolar plate stacking tooling for alkaline electrolytic cells according to claim 1, characterized in that: The following steps are involved: (1) Assemble the tooling rings. Each layer of tooling rings is processed to ensure the flatness and parallelism of the installation surface and to ensure that the manufacturing error meets the production requirements of the electrolyzer; (2) Stacking a corresponding number of tooling rings according to design requirements to meet the number of bipolar plate stacking requirements; (3) The stacking tool is lifted and fixed vertically on the pressure plate at the end of the electrolytic cell, and the pressure plate at the end of the electrolytic cell and the stacking tool form a cylindrical stacking space; (4) The bipolar plates, electrodes, diaphragms and sealing gaskets are placed in the stacking space in sequence, and the protrusions on the outer sides of the bipolar plates are matched with the positioning grooves; (5) After the number of stacked bipolar plates meets the requirement, the stacking tooling is removed, and another electrolytic cell end pressure plate is placed on the top of the stacked bipolar plates. The upper and lower electrolytic cell end pressure plates are connected by bolts, and the two electrolytic cell end pressure plates press and fix the bipolar plates between them.

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