A bipolar plate stacking tool and stacking method for an alkaline electrolyzer

Abstract

A kind of for alkaline electrolytic cell bipolar plate stacking tool and stacking method, stacking tool is embraced shape cylinder, it includes several mutually stacked tool rings, the upper flange of tool ring is locked by locating pin between lower flange and is locked by bolt connection, the outer wall of connecting rod is provided with longitudinal rib plate along its length direction, transverse rib plate is arranged between adjacent longitudinal rib plate, the inner side of connecting rod is provided with locating groove along its length direction, anti-collision nylon plate is arranged in locating groove, the locating groove of corresponding connecting rod of adjacent tool ring is interconnected, tool ring is formed by the first and last connection of several arc units, and the longitudinal rib plate between adjacent arc units is locked by bolt connection. Through tooling, stacking quality is improved, stacking efficiency is improved, and stacking cost is reduced.

Description

Technical Field

[0001] The present 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 and renewable energy will gradually increase, especially as hydrogen energy applications expand in diverse and larger scale. In incremental markets such as natural gas blending with ammonia, hydrogen-based steelmaking, and hydrogen-powered transportation, the cost of green electricity-generated hydrogen is already rapidly declining. This is leading to the gradual expansion of water electrolysis hydrogen production equipment, particularly alkaline water electrolysis hydrogen production equipment. Alkaline regeneration cells with a capacity of 1,000 cubic meters or more have become the mainstream product in the market.

[0003] Currently, stacked electrolyzers are positioned using three round rods positioned along three points around the cell's bipolar plate circumference to form a triangle. After a certain number of plates are stacked, three excimer levels are used to correct for stacking position deviations in three directions. Existing electrolyzer stacking technology is labor-intensive, complex, and subject to numerous human factors, resulting in unpredictable quality control when determining stacking deviations. Furthermore, this method is suitable for testing prototypes and small-batch production, but is not suitable for industrial, large-scale electrolyzer production. Summary of the Invention

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

[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 tool rings stacked on each other, the tool rings are annular, the diameter and height of each layer of tool rings are the same, the tool 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 provided 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 flange and the lower flange of adjacent tool rings are connected by positioning pins. The connecting rod is positioned in the middle and locked by bolts. The outer wall of the connecting rod is provided with a longitudinal rib plate arranged along its length, and a transverse rib plate is provided between adjacent longitudinal rib plates. The transverse rib plate fits 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. 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. The longitudinal rib plates of adjacent arc units are connected and locked by bolts. The 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 tooling. During the process, there is no need for stacking workers to check and inspect the deviation of the stacked bipolar plates. The stacking process and the verification process are reduced, which greatly improves the stacking efficiency and meets 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 shortened, the cost of production auxiliary materials and labor costs are reduced.

[0006] As an improvement, the bottommost tooling ring is connected to the electrolytic cell end pressure plate through 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:

[0010] (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;

[0011] (2) Stack the corresponding number of tooling rings according to the design requirements to meet the requirements of the number of bipolar plates stacked;

[0012] (3) The stacking tooling is lifted and fixed upright on the end pressure plate of the electrolytic cell, and the end pressure plate of the electrolytic cell and the stacking tooling form a cylindrical stacking space;

[0013] (4) Place the bipolar plates, electrodes, diaphragms, and gaskets into the stacked space in sequence, with the protrusions on the outside of the bipolar plates fitting into the positioning grooves;

[0014] (5) After the number of stacked bipolar plates meets the requirements, the stacking tooling is removed, and another electrolytic cell end pressure plate is placed on 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.

[0015] The beneficial effects brought about by the present invention compared with the prior art are:

[0016] 1. Control stacking deviation through tooling to avoid the influence of uncontrollable factors caused by human marking;

[0017] 2. The tooling ensures stacking deviation. During the process, there is no need for stacking workers to calibrate and check the deviation of the stacked bipolar plates. This reduces the stacking and calibration processes, greatly improving the stacking efficiency and meeting the needs of large-scale production.

[0018] 3. The three-way laser instrument and stacking positioning rod used in the current stacking technology can be eliminated; at the same time, due to the simplification of the stacking process and the reduction of the stacking process, the cost of production auxiliary materials and labor costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the usage status diagram of this stacking tooling.

[0020] Figure 2 Schematic diagram of a single-layer tooling ring.

[0021] Figure 3 This is a top view of the tooling ring.

[0022] Figure 4 for Figure 3 Enlarged view of point A.

[0023] Figure 5 Exploded view of the tooling ring. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1 to 5The figure shows a bipolar plate stacking fixture for alkaline electrolytic cells. Based on the cylindrical structure of the alkaline electrolytic cell, the stacking fixture is an embracing cylinder 1. Based on the designed total length of the electrolytic cell, the fixture is designed into a multi-layered structure that can be adjusted to the desired cell length. The fixture comprises three stacked layers of fixture rings 11, each in a circular shape, with the same diameter and height. The tooling ring 11 includes a lower flange 113, an upper flange 112, a number of connecting rods 116 uniformly distributed between the upper flange 112 and the lower flange 113, and an arcuate side plate 117 provided 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 flange 112 and the lower flange 113 of adjacent tooling rings 11 are positioned by a locating pin and locked by bolt connection; the outer wall of the connecting rod 116 is provided with a longitudinal rib 114 arranged along its length direction, and a transverse rib 115 is provided between adjacent longitudinal ribs 114, and the transverse rib 115 is fitted with the outer wall of the arcuate side plate 117, and the longitudinal rib 114 and the transverse rib 11 5 can enhance the overall structural strength of the tooling, prevent tooling deformation, and improve stacking accuracy; 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. The weight-reducing hole can reduce the overall weight of the tooling, and the stacking situation 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, and an anti-collision nylon plate 119 is provided in the positioning groove 118. 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 positioning grooves 118 of the connecting rods 116 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 composed of three arc-shaped units 111 with the same curvature connected end to end. The longitudinal ribs 114 of adjacent arc-shaped units 111 are connected and locked by bolts. Each arc-shaped 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 achieve positioning of the bipolar plate 3 in three directions.

[0026] like Figure 1 As shown, the bipolar plate stacking method of the present invention includes the following steps:

[0027] (1) Assemble the tooling ring 11. Each layer of the tooling ring 11 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 electrolytic cell;

[0028] (2) stacking a corresponding number of tooling rings 11 according to design requirements to meet the required number of bipolar plates 3 stacked;

[0029] (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 a positioning pin. The electrolytic cell end pressure plate 2 and the stacking tooling form a cylindrical stacking space 4.

[0030] (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;

[0031] (5) After the number of stacked bipolar plates 3 meets the requirement, the stacking tooling is removed, and another electrolytic cell end pressure plate 2 is placed on top of the stacked bipolar plates 3. The upper and lower electrolytic cell end pressure plates 2 are connected by bolts, and the two electrolytic cell end pressure plates 2 press and fix the bipolar plates 3 between them.

[0032] The principle of the present invention is to control the stacking deviation through tooling, avoiding the influence of uncontrollable factors caused by human identification. The tooling ensures the stacking deviation, and during the process, the stacking workers do not need to calibrate and check the deviation of the stacked bipolar plates. This reduces the stacking and calibration processes, greatly improving the stacking efficiency and meeting the needs of large-scale production. The three-dimensional laser instrument and stacking positioning rod used in current stacking technology can be eliminated; at the same time, due to the simplification of the stacking process and the reduction of the stacking process, the cost of production auxiliary materials and labor costs are reduced.

Claims

1. A bipolar plate stacking tool for an alkaline electrolytic cell, characterized by: The stacked tooling is an embracing cylinder, which includes several tooling rings stacked on each other, the tooling rings are circular, and the diameter and height of each layer of tooling rings are the same, the tooling ring includes a lower flange, an upper flange, a plurality of connecting rods evenly distributed between the upper flange and the lower flange, and an arcuate 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, the upper flange and the lower flange of adjacent tooling rings are positioned in a locating pin and locked by bolt connection, the outer wall of the connecting rod is provided with a longitudinal rib plate arranged along its length direction, a transverse rib plate is provided between adjacent longitudinal rib plates, the transverse rib plate is fit with the outer wall of the arcuate side plate, the arcuate side plate is provided with a weight reduction 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, 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, the tooling ring is formed by connecting a plurality of arc units end to end, and the longitudinal ribs of adjacent arc 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 electrolytic cell end pressure plate through a positioning pin.

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

4. The bipolar plate stacking tool for alkaline electrolytic cells 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) Stack the corresponding number of tooling rings according to the design requirements to meet the requirements of the number of bipolar plates stacked; (3) The stacking tooling is lifted and fixed upright on the end pressure plate of the electrolytic cell, and the end pressure plate of the electrolytic cell and the stacking tooling form a cylindrical stacking space; (4) Place the bipolar plates, electrodes, diaphragms, and gaskets into the stacked space in sequence, with the protrusions on the outside of the bipolar plates fitting into the positioning grooves; (5) After the number of stacked bipolar plates meets the requirements, the stacking tooling is removed, and another electrolytic cell end pressure plate is placed on 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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