CN117604572A - Method for assembling electrolytic cell and pressurizing assembly used in same - Google Patents

Method for assembling electrolytic cell and pressurizing assembly used in same Download PDF

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Publication number
CN117604572A
CN117604572A CN202311601757.1A CN202311601757A CN117604572A CN 117604572 A CN117604572 A CN 117604572A CN 202311601757 A CN202311601757 A CN 202311601757A CN 117604572 A CN117604572 A CN 117604572A
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CN
China
Prior art keywords
pressure
assembly
pressurizing
contact surface
electrolytic cell
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CN202311601757.1A
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Chinese (zh)
Inventor
请求不公布姓名
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Jiangsu Hydrogen Guide Intelligent Equipment Co ltd
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Jiangsu Hydrogen Guide Intelligent Equipment Co ltd
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Priority to CN202311601757.1A priority Critical patent/CN117604572A/en
Publication of CN117604572A publication Critical patent/CN117604572A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/02—Assembly jigs
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/06—Operating or servicing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

The invention provides an assembly method of an electrolytic cell and a pressurizing assembly used by the assembly method, which comprises the following steps: pressurizing a pile assembly of the electrolytic tank in a sectional pressurizing mode, wherein in each section of pressurizing process, the pile assembly is pressurized at a set pressure and maintained for a period of time, and in two adjacent sections of pressurizing processes, the set pressure in the next section of pressurizing process is larger than the set pressure in the previous section of pressurizing process; fixing the galvanic pile component; the method comprises the steps of adopting a sectional pressure relief mode to relieve pressure of a pile assembly, wherein in each section of pressure relief process, the pile assembly is relieved by a set pressure, and the pressure is maintained for a period of time, and in two adjacent sections of pressure relief processes, the set pressure in the next section of pressure relief process is smaller than the set pressure in the previous section of pressure relief process. The assembly method of the electrolytic tank can enable the pressure inside the electrolytic tank to be more balanced, so as to solve the influence of the stress of the electrolytic tank on the press-fitting effect in the press-fitting process.

Description

Method for assembling electrolytic cell and pressurizing assembly used in same
Technical Field
The invention relates to the technical field of assembly of electrolytic cells, in particular to an assembly method of an electrolytic cell and a pressurizing assembly used by the assembly method.
Background
The electrolysis cell generally comprises a stack assembly and a fixing assembly for fixing the stack assembly together. The stack assembly generally includes a lower end plate, a lower insulating plate, a lower current collecting plate, a unit cell (at least one), an upper current collecting plate, an upper insulating plate, and an upper end plate, which are stacked in this order from the bottom up. The securing assembly typically includes a threaded rod and a nut. The pile component is provided with a plurality of through holes for the screw rod to pass through, and the through holes are distributed at intervals along the circumferential direction of the pile component.
When the electrolytic tank is assembled, namely when the electrolytic tank is packed, the screw rod can be firstly arranged on each through hole of the electric pile component in a penetrating way, then the electric pile component is pressurized, so that the electric pile component reaches the preset pressure (the electric pile component can be pressurized firstly, the electric pile component reaches the preset pressure, the screw rod is arranged on each through hole of the electric pile component in a penetrating way), and finally under the condition of keeping the electric pile component pressurized, the nuts can be respectively arranged at the upper end and the lower end of the screw rod, so that the nuts penetrating through the lower end of the screw rod are in butt joint with the lower end plate, and the nuts penetrating through the upper end of the screw rod are in butt joint with the upper end plate, so that the packing of the electrolytic tank is completed.
Because the electrolytic cell works through electrochemical reaction, in the process of assembling the electrolytic cell, the pressure balance in the electrolytic cell needs to be ensured as much as possible so as to solve the influence of the stress of the electrolytic cell on the press-fitting effect in the press-fitting process. However, in practical application, the method for assembling the electrolytic cell in the related technology cannot well ensure the pressure balance in the electrolytic cell, and cannot effectively solve the influence of the stress of the electrolytic cell on the press-fitting effect in the press-fitting process.
Disclosure of Invention
The invention provides an assembly method of an electrolytic cell, which aims to ensure that the pressure inside the electrolytic cell is more balanced so as to solve the influence of the stress of the electrolytic cell on the press-fitting effect in the press-fitting process.
The invention provides an assembly method of an electrolytic cell, which comprises the following steps:
pressurizing a pile assembly of the electrolytic tank in a sectional pressurizing mode, wherein in each section of pressurizing process, the pile assembly is pressurized at a set pressure and maintained for a period of time, and in two adjacent sections of pressurizing processes, the set pressure in the next section of pressurizing process is larger than the set pressure in the previous section of pressurizing process;
fixing the galvanic pile component; and
the method comprises the steps of adopting a sectional pressure relief mode to relieve pressure of a pile assembly, wherein in each section of pressure relief process, the pile assembly is relieved by a set pressure, and the pressure is maintained for a period of time, and in two adjacent sections of pressure relief processes, the set pressure in the next section of pressure relief process is smaller than the set pressure in the previous section of pressure relief process.
In one embodiment, the number of pressurizing sections for pressurizing the pile assembly of the electrolytic tank by means of the sectional pressurizing is greater than or equal to the number of pressure releasing sections for releasing the pile assembly by means of the sectional pressure releasing.
In one embodiment, the dwell time for each stage of pressurization is a first time, the first time being 1min-10min;
the pressure maintaining time of each pressure release section is a second time, and the second time is 1min-10min.
In one embodiment, in the step of pressurizing the pile assembly of the electrolytic tank in a sectional pressurizing manner and in the step of depressurizing the pile assembly in a sectional depressurizing manner, a pressure head assembly is used for applying pressure to the pile assembly, the pile assembly is provided with a first pressure contact surface in pressure contact with the pressure head assembly, and the pressure head assembly is provided with a second pressure contact surface in pressure contact with the pile assembly;
before the step of pressurizing the pile assembly of the electrolytic tank in a sectional pressurizing mode and after the step of depressurizing the pile assembly in a sectional depressurizing mode, the method further comprises the step of detecting the parallelism of the first pressure contact surface and the second pressure contact surface.
In one embodiment, in the step of detecting parallelism of the first crimp face and the second crimp face, the first crimp face and the second crimp face are relatively stationary, and a spacing between the first crimp face and the second crimp face is 5-15mm.
In one embodiment, the first crimp face has an air port, and at least a portion of the air port is located outside the second crimp face when the second crimp face is crimped onto the first crimp face.
The invention also provides a pressurizing assembly used for the assembly method of the electrolytic cell, wherein the electric pile assembly is provided with a first pressure contact surface which is in pressure contact with the pressure head assembly, and the pressure head assembly is provided with a second pressure contact surface which is in pressure contact with the electric pile assembly, and the pressurizing assembly is characterized in that the pressure head assembly comprises:
a platen having the second press-contact surface; and
the distance measuring sensors are used for detecting the distance between the first press-contact surface and the second press-contact surface, the distance measuring sensors are multiple, and the sensors are distributed at different positions of the pressing plate so as to detect the parallelism of the first press-contact surface and the second press-contact surface according to the distance between the first press-contact surface and the second press-contact surface detected by the distance measuring sensors.
In one embodiment, the platen has a plurality of corners, and the plurality of ranging sensors are disposed one-to-one at the plurality of corners.
In one embodiment, the pressure sensor is further arranged on the pressing plate and is used for detecting the pressure applied to the electric pile assembly.
In one embodiment, the pressure sensors are provided at both corners of the platen and at the middle of the platen.
In the method for assembling the electrolytic tank, the stack assembly of the electrolytic tank is pressurized in a sectional pressurizing mode, the stack assembly is pressurized at a set pressure in each pressurizing process, and the set pressure in the next pressurizing process is larger than the set pressure in the previous pressurizing process. Therefore, when the pile assembly is required to be pressurized to the final pressure target value Fn, the set pressure of the last stage of pressurizing process can be Fn, and the set pressure of the previous stage of pressurizing process is smaller than Fn. In the assembly method of the electrolytic tank, the pile component is pressurized by a set pressure in each section of pressurizing process, the pressure is maintained for a period of time, the internal force of the electrolytic tank in the pressing process is released by the pressure maintaining, the pressure in the electrolytic tank can be more balanced, and therefore the influence of the stress of the electrolytic tank in the pressing process on the pressing effect can be further solved.
Meanwhile, in the assembly method of the electrolytic tank, the pressure of the pile assembly is relieved in a sectional pressure relief mode, wherein in each section of pressure relief process, the pile assembly is relieved by a set pressure, and in two adjacent sections of pressure relief processes, the set pressure of the next section of pressure relief process is smaller than that of the previous section of pressure relief process. Therefore, when the pressure of the pile component with the pressure of Fn is released, the set pressure of the last section of pressure release process can be Fn (the Fn can be far more than 0 and less than Fn, and can be only slightly more than 0), and the set pressure of the previous section of pressure release process is larger than Fn. In the assembly method of the electrolytic tank, in the pressure relief process of each section, the pile component is relieved by a set pressure, the pressure is maintained for a period of time, the internal force generated in the fixing process (in the nut screwing process) of the electrolytic tank is further released by the pressure maintaining, the pressure in the electrolytic tank can be more balanced, and therefore the influence of the stress of the electrolytic tank in the press mounting process on the press mounting effect can be further solved.
Therefore, the assembly method of the electrolytic tank adopts a press-fitting process combining a sectional type pressurizing process and a pressure releasing process, and effectively solves the influence of stress of the electrolytic tank on the press-fitting effect in the press-fitting process.
Drawings
FIG. 1 is a schematic view showing the structure of an electrolytic cell according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of assembling an electrolytic cell according to an embodiment of the invention;
FIG. 3 is a flow chart of step S210 of the method of assembling the electrolytic cell shown in FIG. 2;
FIG. 4 is a schematic view of a support assembly according to an embodiment of the present invention;
FIG. 5 is a side view of the support assembly shown in FIG. 4;
FIG. 6 is a schematic view of the ram assembly of an embodiment of the invention;
FIG. 7 is a layout view of a distance sensor and a pressure sensor of the ram assembly shown in FIG. 6;
fig. 8 is a schematic view of the ram assembly of fig. 7 in compression with a stack assembly.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the cell 10 includes a stack assembly 12 and a securing assembly 14 that secures the elements of the stack assembly 12 together.
The securing assembly 14 generally includes a threaded rod 14a and a nut 14b. The stack assembly 12 has a via 122 through which the screw 14a passes. The plurality of vias 122 are arranged at intervals along the circumferential direction of the stack assembly 12. When assembling the electrolytic cell 10, that is, when packing the electrolytic cell 10, the screw rod 14a may be first inserted into each through hole 122 of the pile assembly 12, then the pile assembly 12 may be pressurized so that the pile assembly 12 reaches a preset pressure (the pile assembly 12 may be first pressurized so that the pile assembly 12 reaches the preset pressure, then the screw rod 14a may be inserted into each through hole 122 of the pile assembly 12), and finally the nuts 14b may be respectively installed at the upper end and the lower end of the screw rod 14a so that the nut 14b (the lower nut 14a 1) inserted into the lower end of the screw rod 14a is in contact with the lower end plate 12a of the pile assembly 12, and the nut 14b (the upper nut 14a 2) inserted into the upper end of the screw rod 14a is in contact with the upper end plate 12e of the pile assembly 12, thereby completing the packing of the electrolytic cell 10.
Specifically, in the present embodiment, the stack assembly 12 includes a lower end plate 12a, a lower insulating plate 12b, a lower current collecting plate 12c, a single cell 12d (at least one, in the present embodiment, a plurality), an upper current collecting plate, an upper insulating plate, and an upper end plate 12e, which are stacked in this order from bottom to top. Wherein, the single cell 12d is at least one. It will be appreciated that in other embodiments, the structure of the cell stack assembly 12 is not limited to the laminated structure described above, and may be varied as appropriate.
Specifically, in the present embodiment, a disc spring assembly 14c is also provided between the upper nut 14a2 and the upper end plate 12e. In this way, the spring assembly 14c is protected from the buffer action of the spring assembly 14c during assembly of the nut 14a2. It will be appreciated that in other embodiments, disc spring assembly 14c may be omitted.
Specifically, in the present embodiment, each fixing assembly 14 includes two lower nuts 14a1 and two upper nuts 14a2, wherein a first nut 142 abuts against the galvanic pile assembly 12, and a second nut 144 abuts against the first nut 142. In this manner, the securing assembly 14 may be made more secure to secure the components of the stack assembly 12. It will be appreciated that in other embodiments, each securing assembly 14 may also include a lower nut 14a1 and an upper nut 14a2.
Specifically, in the present embodiment, as shown in fig. 1 and 8, the number of the vias 122 is 24, and accordingly, the number of the fixing components 14 is 24. It will be appreciated that in other embodiments, the number of vias 122 and fixation elements 14 may be provided as desired.
Specifically, in the present embodiment, the pattern formed by the surrounding of the plurality of vias 122 (the plurality of fixing members 14) is adapted to the shape of the stack assembly 12. In this manner, the components of the stack assembly 12 are more readily secured. More specifically, in the present embodiment, the stack assembly 12 is rectangular, and the plurality of vias 122 and the plurality of fixing assemblies 14 each also enclose a rectangle. It will be appreciated that in other implementations, the pattern formed by the plurality of vias 122 (plurality of fixation assemblies 14) may not be adapted to the shape of the stack assembly 12.
Since the electrolytic cell 10 is operated by electrochemical reaction, it is necessary to ensure pressure equalization in the electrolytic cell 10 as much as possible when assembling the electrolytic cell 10, that is, packing the electrolytic cell 10, in order to solve the influence of stress of the electrolytic cell 10 on the press-fitting effect during the press-fitting process. However, in practical applications, it is found that the method for assembling the electrolytic tank 10 in the related art cannot well ensure the pressure balance inside the electrolytic tank 10, and cannot effectively solve the influence of the stress of the electrolytic tank 10 on the press-fitting effect in the press-fitting process
In order to solve the above problems, the present invention provides a method of assembling an electrolytic cell, as shown in fig. 2. The method for assembling the electrolytic cell comprises the following steps:
step S210, pressurizing a pile assembly of the electrolytic tank in a sectional pressurizing mode, wherein in each section of pressurizing process, the pile assembly is pressurized at a set pressure, and the pressure is maintained for a period of time, and in two adjacent sections of pressurizing processes, the set pressure in the next section of pressurizing process is larger than the set pressure in the previous section of pressurizing process.
Step S220, fixing the galvanic pile assembly.
Step S230, the pile component is decompressed by adopting a sectional decompression mode, wherein in each section of decompression process, the pile component is decompressed by a set pressure, the pile component is maintained for a period of time, and in two adjacent sections of decompression processes, the set pressure in the next section of decompression process is smaller than the set pressure in the previous section of decompression process.
In the method for assembling the electrolytic tank, the stack assembly of the electrolytic tank is pressurized in a sectional pressurizing mode, the stack assembly is pressurized at a set pressure in each pressurizing process, and the set pressure in the next pressurizing process is larger than the set pressure in the previous pressurizing process. Therefore, when the pile assembly is required to be pressurized to the final pressure target value Fn, the set pressure of the last stage of pressurizing process can be Fn, and the set pressure of the previous stage of pressurizing process is smaller than Fn. In the assembly method of the electrolytic tank, the pile component is pressurized by a set pressure in each section of pressurizing process, the pressure is maintained for a period of time, the internal force of the electrolytic tank in the pressing process is released by the pressure maintaining, the pressure in the electrolytic tank can be more balanced, and therefore the influence of the stress of the electrolytic tank in the pressing process on the pressing effect can be further solved.
Meanwhile, in the assembly method of the electrolytic tank, the pressure of the pile assembly is relieved in a sectional pressure relief mode, wherein in each section of pressure relief process, the pile assembly is relieved by a set pressure, and in two adjacent sections of pressure relief processes, the set pressure of the next section of pressure relief process is smaller than that of the previous section of pressure relief process. Therefore, when the pressure of the pile component with the pressure of Fn is released, the set pressure of the last section of pressure release process can be Fn (the Fn can be far more than 0 and less than Fn, and can be only slightly more than 0), and the set pressure of the previous section of pressure release process is larger than Fn. In the assembly method of the electrolytic tank, in the pressure relief process of each section, the pile component is relieved by a set pressure, the pressure is maintained for a period of time, the internal force generated in the fixing process (in the nut screwing process) of the electrolytic tank is further released by the pressure maintaining, the pressure in the electrolytic tank can be more balanced, and therefore the influence of the stress of the electrolytic tank in the press mounting process on the press mounting effect can be further solved.
Therefore, the assembly method of the electrolytic tank adopts a press-fitting process combining a sectional type pressurizing process and a pressure releasing process, and effectively solves the influence of stress of the electrolytic tank on the press-fitting effect in the press-fitting process.
In this embodiment, the number of pressurizing sections for pressurizing the stack assembly of the electrolytic cell by means of the sectional pressurizing is greater than or equal to the number of pressure releasing sections for releasing the pressure of the stack assembly by means of the sectional pressure releasing. Therefore, the influence of the stress of the electrolytic tank on the press-fitting effect in the press-fitting process can be effectively solved, and the assembly efficiency of the electrolytic tank can be improved by accelerating the realization of pressure relief. It is understood that in other embodiments, the number of pressurization segments may be less than the number of depressurization segments.
In this embodiment, the number of pressurizing sections is 3-6 sections, and the number of pressure releasing sections is 2-5 sections. Therefore, the influence of the stress of the electrolytic tank on the press-fitting effect in the press-fitting process can be effectively solved, and the assembly efficiency of the electrolytic tank can be improved by accelerating the realization of pressure relief. Specifically, in the present embodiment, the number of pressurization sections is 4 sections, and the number of depressurization sections is 4 sections.
In this embodiment, the dwell time of each stage of pressurization is a first time, and the first time is 1min-10min. Therefore, the influence of the stress of the electrolytic tank on the press-fitting effect in the press-fitting process can be effectively solved, and the assembly efficiency of the electrolytic tank can be improved by accelerating the realization of pressurization. Specifically, in the present embodiment, the first time is 3min.
In this embodiment, the dwell time of each pressure relief is a second time, and the second time is 1min-10min. Therefore, the influence of the stress of the electrolytic tank on the press-fitting effect in the press-fitting process can be effectively solved, and the assembly efficiency of the electrolytic tank can be improved by accelerating the realization of pressure relief. Specifically, in the present embodiment, the second time is 3min.
In the present embodiment, a step of providing a pile assembly through which a plurality of screws are threaded is further included before step S210. So that the step S220 is to install upper and lower nuts at the upper and lower ends of the screw rod, respectively. It will be appreciated that, in other implementations, when the pile assembly of step S210 is not threaded, step S220 is to thread a plurality of threaded rods on the pile assembly, and install an upper nut and a lower nut on the upper and lower ends of the threaded rods, respectively.
In this embodiment, the pile assembly is fixed by using the fixing assembly, that is, the pile assembly is fixed by using the screw and the nut, so that in step S220, the upper and lower ends of the screw may be respectively provided with the upper nut and the lower nut, or a plurality of screws may be inserted into the pile assembly, and the upper and lower ends of the screw may be respectively provided with the upper nut and the lower nut. It will be appreciated that, in other embodiments, the stack assembly may be fixed by binding, etc., where the specific implementation of step S220 is a specific binding mode.
In this embodiment, as shown in fig. 3, the following steps are further included before step S210:
in step S210a, as shown in fig. 4 and 5, a support assembly 300 is provided, the support assembly 300 includes a support base 310 and support columns 320 disposed on the support base 310, an upper end surface 320a of the support columns 320 is located below the upper end surface 310a of the support base 310, the support columns 320 are plural, and the plural support columns 320 are arranged at intervals along a circumferential direction of the support base 310.
In step S210b, the stack assembly is placed on the upper end surface of the supporting seat, and the plurality of vias of the stack assembly are located on the periphery of the supporting seat and are respectively disposed on the plurality of supporting columns in a one-to-one manner.
In step S210c, screws are respectively inserted into the plurality of through holes, and the lower end of each screw is placed on the upper end surface of the support column.
The supporting seat and the supporting columns of the supporting assembly are respectively used for supporting the pile assembly and the screw rods, so that the pile assembly is conveniently supported, the upper end faces of the screw rods can be controlled to be approximately flush by controlling the upper end faces of the supporting columns to be approximately flush, even if the pile assembly is pressurized, the screw rods do not fall down (the supporting columns are rigid columns at the moment) or recover even if the screw rods fall down (the supporting columns are elastic columns at the moment) due to the supporting action of the supporting columns on the screw rods, and therefore, after the pile assembly is pressurized, the upper end faces of the screw rods can still be ensured to be approximately flush, and the nut is more conveniently assembled at the upper ends of the screw rods.
In the present embodiment, as shown in fig. 1 and 6 to 8, in the step of pressurizing the cell stack assembly of the electrolytic cell by the stage pressurizing method and in the step of depressurizing the cell stack assembly by the stage depressurizing method, that is, in the step S210 and the step S230, the pressure is applied to the cell stack assembly 12 by the ram assembly 400, the cell stack assembly 12 has the first pressure contact surface 124 in pressure contact with the ram assembly 400, and the ram assembly 400 has the second pressure contact surface 400a in pressure contact with the cell stack assembly 12.
In this embodiment, before the step of pressurizing the stack assembly of the electrolytic cell by means of the staged pressurizing, the method further includes a step of detecting parallelism of the first pressure contact surface and the second pressure contact surface. Thus, whether the first press contact surface is too inclined or not can be timely found. If the first press contact surface is too large in inclination, the inclination of the first press contact surface can be adjusted through the pre-pressing stack assembly, so that the problem that the single battery is laterally displaced in the press mounting process due to the fact that the first press contact surface is too large in inclination and generates large lateral force in the press mounting process can be avoided.
In this embodiment, after the step of decompressing the stack assembly by adopting the segmented decompression method, the method further includes a step of detecting the parallelism of the first compression joint surface and the second compression joint surface. In this way, it can be evaluated whether the first crimp surface after the packing is completed is excessively inclined. If the first pressure welding surface is too large in inclination, the electrolytic tank finished in packaging can be judged to be unqualified, and reworking is needed to be carried out for packaging again.
In this embodiment, in the step of detecting the parallelism of the first crimp face and the second crimp face, the first crimp face and the second crimp face are relatively stationary, and the spacing between the first crimp face and the second crimp face is 5 to 15mm. In this way, the parallelism detection of the first press contact surface and the second press contact surface is very convenient to realize by using the distance measuring sensor. Specifically, in the present embodiment, the interval between the first crimp face and the second crimp face is 10mm.
In this embodiment, the first crimp face 124 has a gas port 126. When the second pressure contact surface 400a is in pressure contact with the first pressure contact surface 124, at least part of the air port 126 is located outside the second pressure contact surface 400a, that is, at least part of the air port 126 is not covered by the second pressure contact surface 400a, so that the air port 126 of the electrolytic tank is not completely sealed by the pressure head assembly 400 and is communicated with the atmosphere, and the internal pressure of the electrolytic tank is released in time. Specifically, in the present embodiment, the plurality of air ports 126 are disposed one-to-one at the plurality of corners of the first press-contact surface 124.
The present invention also provides a pressurizing assembly 400 for use in the above-described method of assembling an electrolytic cell, as shown in fig. 1 and 6-8. Wherein the stack assembly 12 has a first crimp face 124 that is crimped with the ram assembly 400. The ram assembly 400 has a second crimp face 400a that is crimped with the stack assembly 12.
Ram assembly 400 includes platen 410 and ranging sensor 420. The platen 410 has a second press face 400a. The distance measurement sensor 420 is used to detect the spacing between the first crimp face 124 and the second crimp face 400a. The distance measuring sensor 420 is plural. The plurality of sensors 420 are distributed at different portions of the platen 410 to detect parallelism of the first and second crimp faces 124 and 400a according to the spacing between the first and second crimp faces 124 and 400a detected by the plurality of ranging sensors 420.
The ram assembly 400 described above is very convenient for achieving the detection of parallelism of the first crimp face 124 and the second crimp face 400a. It will be appreciated that in other embodiments, other means may be employed to detect parallelism of the first crimp face 124 and the second crimp face 400a.
In the present embodiment, the platen 410 has a plurality of corners, and the plurality of ranging sensors 420 are disposed at the plurality of corners one-to-one. Therefore, the parallelism detection accuracy is improved. It will be appreciated that in other embodiments, there may be only two ranging sensors 420, and that two ranging sensors 420 may be disposed on the platen 410 other than at the corners. Specifically, in the present embodiment, the platen 410 has a square shape, and the number of the ranging sensors 420 is four. It will be appreciated that in other embodiments, platen 410 may be polygonal with a number of sides greater than four, in which case ranging sensor 420 may be greater than four. It will be appreciated that in other embodiments, the platen 410 may be rounded or otherwise have no corners, and that the plurality of ranging sensors 420 may be distributed in various orientations (e.g., up, down, left, right, etc.) of the platen 410.
In this embodiment, the ram assembly 400 further includes a pressure sensor 430 disposed on the platen 410. The pressure sensor 430 is used to detect the pressure applied to the stack assembly 12. In this manner, it is very convenient to obtain the pressure exerted by the ram assembly 400 on the stack assembly 12. It will be appreciated that in other embodiments, the pressure sensor 430 may be omitted, in which case the pressure exerted by the ram assembly 400 on the stack assembly 12 may be obtained from the torque of the servo hydraulic system driving the movement of the ram assembly 400.
In the present embodiment, pressure sensors 430 are provided at both corners of the platen 410 and at the middle of the platen 410. That is, in the present embodiment, the pressure sensor 430 is arranged in a corner+center layout manner, so that the problem that the stress on the mechanical structure is too concentrated due to the too concentrated single point of the pressure sensor 430 is avoided, thereby causing the deformation of the pressing plate 410 and affecting the press-fitting effect. Specifically, in the present embodiment, the pressing plate 410 has a square shape, the total number of the pressure sensors 430 is 5, and each of the four corners and the center is provided with one pressure sensor 430 in a five-point layout manner of four corners and the center.
In this embodiment, the ram assembly 400 further includes a ram 440 for connection to a servo hydraulic system. The pressing plates 410 are arranged at intervals on the pressing head 440. The gap between platen 410 and ram 440 is used to keep away from ranging sensor 410 and/or pressure sensor 430. In this manner, not only is the platen 410 conveniently connected to the servo hydraulic system, but the distance measurement sensor 410 and/or the pressure sensor 430 are also conveniently installed.
The following is a specific embodiment of the press-fitting according to the present invention
Firstly controlling a displacement mode of a servo hydraulic system, driving a pressure head assembly to move downwards, stopping at a position 10mm away from an upper end plate of the electrolytic tank, observing the values of four-point distance measuring sensors, and if the difference of the values of the four-point distance measuring sensors is in a conforming range, considering that the parallelism of a pressing plate of the upper end plate of the electrolytic tank and the pressing plate of the upper pressure head assembly meets the requirement, controlling the pressure mode of the servo hydraulic system, and continuously driving the pressure head assembly to move downwards;
when the feedback pressure value of the pressure sensor is F1, the servo hydraulic system is controlled to perform a pressure maintaining mode, the pressure maintaining time is T1, and the internal force of the electrolytic tank in the production process of press fitting is released through pressure maintaining, so that the pressure inside the electrolytic tank can be more balanced;
when the pressure maintaining time T1 is up, the servo hydraulic system is controlled to continue to move in the pressure mode, the pressure head assembly is driven to move downwards, and when the feedback pressure value of the pressure sensor is F2, the servo hydraulic system is controlled to perform the pressure maintaining mode, and the pressure maintaining time is T2;
when the pressure maintaining time T2 is up, the servo hydraulic system is controlled to continue to move in the pressure mode, the pressure head assembly is driven to move downwards, and when the feedback pressure value of the pressure sensor is F3, the servo hydraulic system is controlled to perform the pressure maintaining mode, and the pressure maintaining time is T3;
sequentially carrying out sectional pressurization, and controlling a servo hydraulic system to carry out a pressure maintaining mode when the set final pressure target value Fn is reached, wherein the pressure maintaining time is Tn; and when the dwell time Tn is up, controlling the servo hydraulic system to continue to move in a displacement mode, ensuring that the pressure head assembly is stationary at the current position, and then packaging the electrolytic tank.
After the packing work is finished, the servo hydraulic system is controlled to be switched to a pressure mode and then to carry out slow pressure relief, when the feedback pressure value of the pressure sensor is f1, the servo hydraulic system is controlled to carry out a pressure maintaining mode, the pressure maintaining time is t1, the internal force of the electrolytic tank in the tightening process is further released through pressure maintaining, and the pressure inside the electrolytic tank can be more balanced;
when the pressure maintaining time t1 is up, controlling the servo hydraulic system to keep in a pressure mode, driving the pressure head assembly to move upwards, and when the feedback pressure value of the pressure sensor is f2, controlling the servo hydraulic system to perform the pressure maintaining mode, wherein the pressure maintaining time is t2;
when the pressure maintaining time t2 is up, controlling the servo hydraulic system to keep in a pressure mode, driving the pressure head assembly to move upwards, and when the feedback pressure value of the pressure sensor is f3, controlling the servo hydraulic system to perform the pressure maintaining mode, wherein the pressure maintaining time is t3;
and sequentially performing sectional decompression, when the set final decompression pressure target value fn is reached, controlling the servo hydraulic system to switch to a displacement mode, continuously moving the pressure head assembly upwards, and when the pressure sensor value is zero, observing the value of the four-point distance measuring sensor to evaluate whether the packed electrolytic tank meets the requirement or not.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. A method of assembling an electrolytic cell comprising the steps of:
pressurizing a pile assembly of the electrolytic tank in a sectional pressurizing mode, wherein in each section of pressurizing process, the pile assembly is pressurized at a set pressure and maintained for a period of time, and in two adjacent sections of pressurizing processes, the set pressure in the next section of pressurizing process is larger than the set pressure in the previous section of pressurizing process;
fixing the galvanic pile component; and
the method comprises the steps of adopting a sectional pressure relief mode to relieve pressure of a pile assembly, wherein in each section of pressure relief process, the pile assembly is relieved by a set pressure, and the pressure is maintained for a period of time, and in two adjacent sections of pressure relief processes, the set pressure in the next section of pressure relief process is smaller than the set pressure in the previous section of pressure relief process.
2. The method for assembling an electrolytic cell according to claim 1, wherein the number of pressurizing sections for pressurizing the stack assembly of the electrolytic cell by means of the sectional pressurizing is greater than or equal to the number of pressure releasing sections for releasing the stack assembly by means of the sectional pressure releasing.
3. The method of assembling an electrolytic cell according to claim 1, wherein the dwell time of each pressurizing step is a first time, the first time being 1min to 10min;
the pressure maintaining time of each pressure release section is a second time, and the second time is 1min-10min.
4. The method of assembling an electrolytic cell according to claim 1, wherein in the step of pressurizing the cell stack assembly of the electrolytic cell by means of the staged pressurizing and in the step of depressurizing the cell stack assembly by means of the staged depressurizing, a pressure is applied to the cell stack assembly by means of a pressure head assembly having a first pressure contact surface in pressure contact with the pressure head assembly and a second pressure contact surface in pressure contact with the cell stack assembly;
before the step of pressurizing the pile assembly of the electrolytic tank in a sectional pressurizing mode and after the step of depressurizing the pile assembly in a sectional depressurizing mode, the method further comprises the step of detecting the parallelism of the first pressure contact surface and the second pressure contact surface.
5. The method of assembling an electrolytic cell according to claim 4, wherein in the step of detecting parallelism of the first pressure contact surface and the second pressure contact surface, the first pressure contact surface and the second pressure contact surface are relatively stationary, and a distance between the first pressure contact surface and the second pressure contact surface is 5 to 15mm.
6. The method of assembling an electrolytic cell according to claim 4, wherein the first pressure contact surface has an air port, and wherein at least a portion of the air port is located outside the second pressure contact surface when the second pressure contact surface is pressure-contacted with the first pressure contact surface.
7. A pressurizing assembly for use in the method of assembling an electrolytic cell according to any one of claims 1 to 6, wherein the stack assembly has a first crimping surface which is crimped with the ram assembly, and the ram assembly has a second crimping surface which is crimped with the stack assembly, characterized in that the ram assembly comprises:
a platen having the second press-contact surface; and
the distance measuring sensors are used for detecting the distance between the first press-contact surface and the second press-contact surface, the distance measuring sensors are multiple, and the sensors are distributed at different positions of the pressing plate so as to detect the parallelism of the first press-contact surface and the second press-contact surface according to the distance between the first press-contact surface and the second press-contact surface detected by the distance measuring sensors.
8. The pressurizing assembly for the assembly method of the electrolytic cell according to claim 7, wherein the pressure plate has a plurality of corners, and a plurality of the distance measuring sensors are disposed one to one at the plurality of corners.
9. The pressurizing assembly for the assembly method of the electrolytic cell according to claim 7, further comprising a pressure sensor provided on the pressure plate for detecting a pressure applied to the cell stack assembly.
10. A pressurizing assembly for an electrolytic cell assembling method according to claim 9, wherein the pressure sensor is provided at each of the corners of the pressure plate and the middle of the pressure plate.
CN202311601757.1A 2023-11-28 2023-11-28 Method for assembling electrolytic cell and pressurizing assembly used in same Pending CN117604572A (en)

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Application Number Priority Date Filing Date Title
CN202311601757.1A CN117604572A (en) 2023-11-28 2023-11-28 Method for assembling electrolytic cell and pressurizing assembly used in same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311601757.1A CN117604572A (en) 2023-11-28 2023-11-28 Method for assembling electrolytic cell and pressurizing assembly used in same

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CN117604572A true CN117604572A (en) 2024-02-27

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