CN218779041U - Pole frame, pole plate and electrolytic cell - Google Patents

Abstract

The utility model provides a polar frame, polar plate and electrolysis trough relates to hydrogen manufacturing technical field. The polar frame includes the framework, the framework is provided with the runner structure and is used for the mounting hole of holding main polar plate, the framework is used for mounting hole department with main polar plate welded connection, the runner structure be used for main polar plate thickness direction one side with the mounting hole intercommunication forms inside intercommunication mouth, the runner structure is in position outside the mounting hole is formed with outside intercommunication mouth, at least partial highway section is provided with the insulating layer structure in the runner structure. Through at least partial highway section setting insulating layer structure in the runner structure for the electrically conductive area of contact between runner structure and the electrolyte reduces or even can neglect, under the support function's of keeping the polar frame the circumstances, reducible electric current passes through the electrolyte conduction in framework and the runner structure in proper order, can reduce the proportion of leakage current, makes more electric energy be used for carrying out effective electrolytic reaction in cathode chamber or positive pole indoor.

Description

Pole frame, pole plate and electrolytic cell

Technical Field

The utility model relates to a hydrogen manufacturing technical field particularly, relates to a utmost point frame, polar plate and electrolysis trough.

Background

The electrolytic cell of the hydrogen production system is generally composed of several to hundreds of electrolytic cells connected in series, and each electrolytic cell is composed of components such as a polar plate, an electrode and a diaphragm. The polar plate comprises a polar frame and a main polar plate, wherein a cathode chamber or an anode chamber for electrolysis is formed on two sides of the main polar plate, a pore passage communicated with the cathode chamber or the anode chamber is formed in the polar frame, and the pore passage is used for the passing of electrolyte or gas.

In an electrolytic cell, an electrode frame needs to play a supporting role and is generally made of a metal material, however, the arrangement mode can cause the electrode frame to be electrified, and when electrolytic operation is carried out, partial current can flow out of a cathode chamber or an anode chamber through electrolyte at the electrode frame and a pore passage, so that effective current for electrolytic reaction is reduced, and energy utilization rate and electrolytic efficiency are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses electric current leaks through utmost point frame and pore department electrolyte on the utmost point frame when aiming at solving electrolysis in the correlation technique to a certain extent, leads to the problem of electric energy loss.

For at least solving above-mentioned problem to a certain extent, first aspect, the utility model provides a polar frame, it includes the framework, the framework is provided with the runner structure and is used for the mounting hole of holding main polar plate, the framework is used for mounting hole department with main polar plate welded connection, the runner structure is used for main polar plate thickness direction one side with the mounting hole intercommunication forms inside intercommunication mouth, the runner structure is in position outside the mounting hole is formed with outside intercommunication mouth, at least some highway sections are provided with insulating layer structure in the runner structure.

Optionally, an insulating layer structure is disposed at least at the external communication port in the flow channel structure.

Optionally, the utmost point frame still includes insulating cover, the runner structure includes follows the thickness direction runs through runner hole and one end that the framework set up with the runner groove of runner hole intercommunication, the other end in runner groove is used for forming inside intercommunication mouth, the both ends in runner hole are used for forming respectively outside intercommunication mouth, insulating cover inlays to be located runner hole and/or in the runner inslot, insulating cover is used for forming the insulating layer structure.

Optionally, the insulating bush includes the cover body, the cover body inlays to be located the runner is downthehole, be provided with the side direction runner on the cover body, side direction runner one end with the inner chamber intercommunication of the cover body, the side direction runner other end corresponds to the runner groove sets up.

Optionally, a positioning part is formed on the outer wall of the sleeve body in a protruding manner;

the frame body is provided with a positioning groove communicated with the flow channel hole, and the positioning part is embedded in the positioning groove to position the lateral flow channel and the flow channel groove;

and/or, one of the positioning parts is embedded in the runner groove, and the lateral runner is correspondingly arranged at the positioning part.

Optionally, the positioning part is located at a first end of the sleeve body in the thickness direction, and the first end is the end where the lateral flow channel is located; the positioning parts are respectively positioned on two sides of the lateral flow channel.

Optionally, the frame body is provided with a plurality of flow channel structures respectively and correspondingly on two sides in the thickness direction, and the plurality of flow channel structures corresponding to each side respectively include an electrolyte flow channel and an exhaust flow channel.

Optionally, the insulating sleeve comprises a reinforcing framework and an insulating adhesive layer formed on the reinforcing framework in an encapsulating manner;

and/or a plurality of separate cavities are formed in the inner cavity and/or the lateral flow passages, the separate cavities are communicated through communicating openings, and the communicating openings of different adjacent separate cavities are arranged in a staggered manner.

In a second aspect, the present invention provides a pole plate comprising a main pole plate and a pole frame as described above in relation to the first aspect.

In a third aspect, the present invention provides an electrolytic cell comprising a plate as described above in relation to the second aspect.

For relevant prior art, the utility model discloses a utmost point frame, among polar plate and the electrolysis trough, when framework and main polar plate welded connection form the polar plate jointly and be used for the electrolysis trough, the runner structure circulates through outside intercommunication mouth and outside runner, through inside intercommunication mouth and mounting hole intercommunication, this moment, inside intercommunication mouth is located one side of main polar plate, that is to say, inside circulation mouth is used for the cathode chamber or the anode chamber intercommunication with main polar plate one side, can realize the intercommunication of cathode chamber or anode chamber and outside runner, this moment, through at least partial highway section sets up the insulating layer structure in the runner structure, make electrically conductive area of contact between runner structure and the electrolyte reduce or can ignore even, this moment, under the circumstances of the support function who keeps utmost point frame, reducible current conducts through the electrolyte in framework and the runner structure in proper order, can reduce the proportion of leakage current electrolyte in framework and the runner structure, make more electric energy be used for effectively electrolytic reaction in cathode chamber or anode chamber, the utility model discloses the leakage current can be reduced, improve electrolysis efficiency.

Drawings

Fig. 1 is an exploded view of a plate in an embodiment of the present invention;

fig. 2 is a schematic structural view of an insulating sleeve according to an embodiment of the present invention;

fig. 3 is a schematic view of the frame body on the cathode chamber side in the embodiment of the present invention;

fig. 4 is a schematic view of the frame body on the side of the anode chamber in the embodiment of the present invention;

fig. 5 is an exploded view of an embodiment of the present invention in which a sealing gasket is located between the plates.

Description of the reference numerals:

1-a frame body; 11-mounting holes; 12-a flow channel hole; 13-runner channels; 14-a positioning groove; 2-a main pole plate; 21-mastoid structure; 3-an insulating sleeve; 31-a sheath body; 32-lateral flow passages; 33-a positioning section; 34-lumen; 4-a sealing gasket; 41-through holes; 5-an electrolyte flow channel; 51-anode side electrolyte flow path; 52-cathode side electrolyte flow channels; 6-an exhaust channel; 61-oxygen exhaust flow channel; 62-hydrogen exhaust flow path.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the drawings, the Z-axis represents the vertical, i.e., up-down, position, and the positive direction of the Z-axis (i.e., the arrow of the Z-axis points) represents up, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the X-axis represents a horizontal direction and is designated as a left-right position, and a positive direction of the X-axis (i.e., an arrow direction of the X-axis) represents a right side and a negative direction of the X-axis (i.e., a direction opposite to the positive direction of the X-axis) represents a left side; in the drawings, the Y-axis indicates the front-rear position, and the positive direction of the Y-axis (i.e., the arrow direction of the Y-axis) indicates the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) indicates the rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

As shown in fig. 1, the embodiment of the utility model provides a polar frame, it includes framework 1, framework 1 is provided with the runner structure and is used for holding the mounting hole 11 of main polar plate 2, framework 1 is used for locating at mounting hole 11 and main polar plate 2 welded connection, the runner structure is used for communicating with mounting hole 11 and forming inside intercommunication mouth in main polar plate 2's thickness direction one side, the position of runner structure outside mounting hole 11 is formed with outside intercommunication mouth, at least some highway sections are provided with the insulating layer structure in the runner structure.

The frame body 1 and the main electrode plate 2 are made of a metal material, and have conductivity, and the frame body 1 has high structural stability and good supportability.

It should be noted that the insulating layer structure may be an insulating coating, and is directly coated on the inner wall of the flow channel hole 12 and/or the flow channel groove 13. For example, phosphate-based inorganic binder coatings, plasma sprayed Al2O3 coatings. It may of course also be formed at least partly by an insulating sleeve 3 as described later on, as will be illustrated.

In the present specification, the whole frame 1 is taken as a circular ring as an example, and in this case, the thickness direction is the axial direction of the frame 1, and the thickness direction can be understood as the Y-axis direction in the drawing.

So, when framework 1 and main polar plate 2 welded connection form the polar plate jointly and are used for the electrolysis trough, the runner structure circulates through outside intercommunication mouth and outside runner, communicate with mounting hole 11 through inside intercommunication mouth, at this moment, inside intercommunication mouth is located one side of main polar plate 2, that is to say, inside circulation mouth is used for the cathode chamber or the anode chamber intercommunication with 2 one sides of main polar plate, can realize the intercommunication of cathode chamber or anode chamber and outside runner, at this moment, through setting up the insulating layer structure in at least partial highway section in the runner structure, make the electrically conductive area of contact between runner structure and the electrolyte reduce or even can ignore, at this moment, under the condition that keeps the support function of utmost point frame, reducible current is in proper order through the electrolyte conduction in framework 1 and the runner structure, can reduce the proportion of electrolyte leakage current in framework 1 and the runner structure, make more electric energy be used for carrying out effective electrolytic reaction in cathode chamber or anode chamber, the utility model discloses can improve electrolysis efficiency, still can improve framework 1's life to a certain extent.

Optionally, an insulating layer structure is arranged in the flow channel structure at least at the external communication port.

When the electrolyte in the frame 1 and the flow channel structure is sequentially leaked through the frame 1 after the frame 1 and the main electrode 2 are connected to form the electrode plate, since the conductivity of the metal is high relative to the conductivity of the electrolyte, the resistance of the leakage path of the electrolyte leaking through the external flow port and the external communication port is relatively low relative to the resistance of the leakage path formed in other portions, for example, the resistance is smaller than the resistance of the leakage path formed by the electrolyte through the internal flow port and the internal communication port.

Therefore, when the insulating layer structure cannot cover all inner walls of the flow channel structure, which are used for being in contact with the electrolyte, the insulating layer structure is preferentially arranged at the external communication port, and compared with the insulating layer structure arranged at other positions, such as the internal communication port, the resistance of a leakage path formed by the electrolyte in the frame body 1 and the flow channel structure can be greatly improved, and the electric energy utilization rate can be improved.

As shown in fig. 1 and fig. 2, the electrode frame further includes an insulating sleeve 3, the flow channel structure includes a flow channel hole 12 penetrating through the frame body 1 along the thickness direction and a flow channel groove 13 having one end communicated with the flow channel hole 12, the other end of the flow channel groove 13 is used for forming an internal communication port, and two ends of the flow channel hole 12 are respectively used for forming an external communication port; the insulating sleeve 3 is embedded in the runner hole 12 and/or the runner groove 13, and the insulating sleeve 3 is used for forming an insulating layer structure.

When the plate is used in an electrolytic cell, generally, the flow channel structures corresponding to the anode chamber and the cathode chamber are not communicated with each other, and the flow channel holes 12 corresponding to the anode chambers on different plates are communicated with each other (as shown in fig. 5, a sealing gasket 4 is generally arranged between the plate frames, and a through hole 41 corresponding to the flow channel hole 12 is arranged on the sealing gasket 4), so as to jointly form a main flow channel, and the main flow channel is communicated with each anode chamber through each flow channel groove 13.

Taking the insulating sleeve 3 embedded in the flow channel hole 12 as an example, at this time, the outside of the insulating sleeve 3 is in close contact with the inner wall of the flow channel hole 12 to form a large interference, so that the electrolyte passes through the inner cavity 34 of the insulating sleeve 3 at the insulating sleeve 3. The insulating sleeve 3 may be an O-ring seal, for example.

Thus, the conductive contact area between the inner wall of the flow channel hole 12 and the electrolyte can be reduced, and/or the conductive contact area between the inner wall of the flow channel groove 13 and the electrolyte can be reduced; utilize insulating cover 3 to form the insulating layer structure, can be on the basis of realizing reducing the electric leakage, subsequent maintenance and maintenance of being convenient for, for example when using for a long time and damaging, can directly change insulating cover 3, if adopt other modes such as insulating coating formation insulating layer structure, after insulating layer structure damage for example by electrolyte corrodes, need transport the polar plate again to the producer and carry out the coating again and handle, be unfavorable for accomplishing the maintenance fast, adopt insulating cover 3's form, be convenient for change, the operation is convenient, therefore, the clothes hanger is strong in practicability.

As shown in fig. 1 and 2, optionally, the insulating sleeve 3 includes a sleeve body 31, the sleeve body 31 is embedded in the flow channel hole 12, a lateral flow channel 32 is disposed on the sleeve body 31, one end of the lateral flow channel 32 is communicated with an inner cavity 34 of the sleeve body 31, and the other end of the lateral flow channel 32 is disposed corresponding to the flow channel groove 13.

Illustratively, in this case, both ends of the sleeve body 31 extend to the axial edges of the flow passage hole 12, and are flush with or slightly protruded from the axial end face of the flow passage hole 12. When the frame 1 contacts with the sealing gasket 4, the sleeve 31 forms a seal with the sealing gasket 4 at the external communication port, which increases the resistance of the electric conduction through the frame 1 and the electrolyte, and reduces the leakage of the current at the flow channel structure.

It should be understood that the lateral flow channel 32 may be a hole or a groove disposed on the side wall of the sheath 31, which is shown in fig. 1 as a groove, and when the groove is a groove, the opening direction of the groove may be the same or opposite to the opening direction of the flow channel groove 13, which is not limited, and fig. 1 shows the same opening direction.

It should be understood that the other end of the lateral flow channel 32 is disposed corresponding to the flow channel groove 13, and it may be that the other end of the lateral flow channel 32 is communicated with the flow channel groove 13, or the other end of the lateral flow channel 32 is disposed protruding from the outer wall of the sheath body 31 and extends to the inside of the flow channel groove 13, even to the internal communication port formed by the flow channel groove 13, in which case, the insulating sheath 3 may cover substantially the entire inner wall of the flow channel structure. Alternatively, the lateral flow path 32 and the flow path groove 13 may also function as a positioning portion 33 and a positioning groove 14 described later, and a good positioning effect can be obtained without providing the positioning portion 33 and the positioning groove 14.

As shown in fig. 1 and 2, the outer wall of the sleeve 31 is protruded to form a positioning portion 33, the frame 1 is provided with a positioning groove 14 communicated with the flow channel hole 12, and the positioning portion 33 is embedded in the positioning groove 14 to position the lateral flow channel 32 and the flow channel groove 13.

That is, when the positioning portion 33 is embedded in the positioning groove 14, the lateral flow passage 32 corresponds to the position of the flow passage groove 13.

At the moment, better installation stability can be obtained, and the practicability is strong. In this case, the lateral flow path 32 may be at least partially extended into the flow path groove 13 to be positioned in a plurality of directions.

Optionally, one of the positioning portions 33 is further used for forming the lateral flow channel 32, and at this time, the positioning portion 33 is embedded in the flow channel groove 13, which is not shown in the figure and will not be described in detail here.

As shown in fig. 1 and fig. 2, optionally, the positioning portion 33 is located at a first end of the sheath 31 in the thickness direction, where the first end is an end where the lateral flow channel 32 is located.

Therefore, along the thickness direction, the first end applies force to the second end, the sleeve body 31 of the insulating sleeve 3 is plugged into the runner hole 12, the positioning part 33 corresponds to the positioning groove 14, the lateral runner 32 corresponds to the runner groove 13 until the insulating sleeve 3 is installed in place, the insulating sleeve 3 can be well attached to the runner hole 12 and the runner groove 13 of the runner structure, and good sealing and isolating performance is achieved.

As shown in fig. 2, further, at least two positioning portions 33 are respectively located at two sides of the lateral flow passage 32.

In this way, it is easy to apply force to the two positioning portions 33 so that the insulating sheath 3 is compressed, thereby facilitating assembly into the flow channel hole 12.

It should be understood that in some cases, three positioning portions 33 are provided, wherein one of the positioning portions at the middle position is used for correspondingly opening the lateral flow passage 32, which is shown in the figure and will not be described in detail herein.

As shown in fig. 1, 3 and 4, optionally, two sides of the frame 1 in the thickness direction are respectively provided with a plurality of flow channel structures, and the plurality of flow channel structures corresponding to each side respectively include an electrolyte flow channel 5 and an exhaust flow channel 6.

Specifically, two sides of the frame 1 in the thickness direction correspond to a cathode chamber side (for example, the cathode chamber is located on the side opposite to the Y axis of the main plate 2) and an anode chamber side (for example, the cathode chamber is located on the side of the Y axis of the main plate 2), respectively, where the electrolyte flow channel 5 corresponding to the cathode chamber side is a cathode-side electrolyte flow channel 52, the exhaust flow channel 6 corresponding to the cathode chamber side is a hydrogen exhaust flow channel 62, the electrolyte flow channel 5 corresponding to the anode chamber side is an anode-side electrolyte flow channel 51, the exhaust flow channel 6 corresponding to the anode chamber side is an oxygen exhaust flow channel 61, and the flow channel structures of the cathode chamber side and the anode chamber side do not interfere with each other. The anode-side electrolyte flow path 51 and the cathode-side electrolyte flow path 52 are generally provided near the lower end of the frame 1 for replenishing the anode chamber and the cathode chamber with electrolyte, respectively.

In this way, the frame and the main plate 2 form a bipolar plate, which is not described in detail here.

In a further alternative, the insulating sheath 3 comprises a reinforcing skeleton and an insulating glue layer encapsulated on the reinforcing skeleton (this solution is not shown).

That is to say, insulating cover 3 still strengthens its bulk rigidity through embedding reinforcing frame, avoids seriously warping and influencing its runner function or sealing performance at the assembly process or use a period of time.

In a further alternative, the inner cavity 34 and/or the lateral flow passage 32 are formed with a plurality of compartments which communicate with each other through communication openings, and the communication openings of different adjacent compartments are offset (this solution is not shown).

It will be appreciated that the electrolyte passing through the flow channel structure is also capable of conducting electricity itself, forming a leakage circuit.

The length that needs when can strengthen electrolyte flow through cover body 31 like this to the resistance that this part corresponds can be multiplicable, thereby the electric quantity that reduces to reveal through the inside electrolyte of insulating cover 3, thereby can improve electric energy utilization ratio, improve electrolysis efficiency.

It should be understood that the related art may be adopted for the parts not described in the present scheme, for example, the mastoid structure 21 may be provided on the main pole plate 2. The electrolyte may be an alkaline electrolyte or the like.

As shown in fig. 1, another embodiment of the present invention provides a pole plate, which includes a main pole plate 2 and the pole frame of the above embodiment.

The main electrode plate 2 is positioned in a mounting hole 11 formed in the frame body 1 of the electrode frame and is welded to the frame body 1, and details thereof will not be described here.

Another embodiment of the present invention provides an electrolytic cell comprising the plate of the above embodiment.

As shown in fig. 5, which shows a schematic view of the relative positions of two bipolar plates and the sealing gasket 4 therebetween. The frame bodies 1 of the polar frames of the two bipolar plates are respectively positioned at two sides of the sealing gasket 4, the sealing gasket 4 can be arranged into an annular structure, the inner ring of the sealing gasket is connected with the diaphragm, two sides of the diaphragm are respectively and correspondingly provided with electrodes, and at the moment, the electrodes and the polar plates at two sides of the diaphragm respectively form cavities, such as an anode chamber and a cathode chamber, which are not described in detail herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the terms "an embodiment," "one embodiment," "some embodiments," "exemplary" and "one embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present disclosure.

Claims (10)

1. The utility model provides a polar frame, its characterized in that includes framework (1), framework (1) is provided with runner structure and is used for mounting hole (11) of holding main polar plate (2), framework (1) is used for mounting hole (11) department with main polar plate (2) welded connection, runner structure is used for the thickness direction one side of main polar plate (2) with mounting hole (11) intercommunication forms inside intercommunication mouth, the runner structure is in position outside mounting hole (11) is formed with outside intercommunication mouth, at least some highway sections are provided with the insulating layer structure in the runner structure.

2. The pole frame according to claim 1, wherein an insulating layer structure is provided within the flow channel structure at least at the external communication port.

3. The pole frame according to claim 1, further comprising an insulating sleeve (3), wherein the flow channel structure comprises a flow channel hole (12) penetrating the frame body (1) in the thickness direction and a flow channel groove (13) having one end communicating with the flow channel hole (12), the other end of the flow channel groove (13) is used for forming the internal communication port, the two ends of the flow channel hole (12) are respectively used for forming the external communication port, the insulating sleeve (3) is embedded in the flow channel hole (12) and/or the flow channel groove (13), and the insulating sleeve (3) is used for forming the insulating layer structure.

4. The pole frame according to claim 3, wherein the insulating sleeve (3) comprises a sleeve body (31), the sleeve body (31) is embedded in the flow channel hole (12), a lateral flow channel (32) is arranged on the sleeve body (31), one end of the lateral flow channel (32) is communicated with an inner cavity (34) of the sleeve body (31), and the other end of the lateral flow channel (32) is arranged corresponding to the flow channel groove (13).

5. The pole frame according to claim 4, characterized in that the outer wall of the sleeve body (31) is convexly formed with a positioning part (33);

the frame body (1) is provided with a positioning groove (14) communicated with the flow channel hole (12), and the positioning part (33) is embedded in the positioning groove (14) to position the lateral flow channel (32) and the flow channel groove (13);

and/or one positioning part (33) is embedded in the runner groove (13), and the lateral runner (32) is correspondingly arranged at the positioning part (33).

6. The pole frame according to claim 5, wherein the positioning portion (33) is located at a first end of the sleeve body (31) in the thickness direction, the first end being an end where the lateral flow channel (32) is located; the positioning parts (33) are respectively positioned on two sides of the lateral flow passage (32).

7. The pole frame according to any one of claims 1 to 6, wherein a plurality of the flow channel structures are correspondingly arranged on two sides of the frame body (1) along the thickness direction, and the flow channel structures corresponding to each side respectively comprise an electrolyte flow channel (5) and an exhaust flow channel (6).

8. The pole frame according to claim 4, characterized in that the insulating sheath (3) comprises a reinforcing skeleton and an insulating glue layer encapsulated on the reinforcing skeleton;

and/or a plurality of separated cavities are formed in the inner cavity (34) and/or the lateral flow passage (32), the separated cavities are communicated through communication openings, and the communication openings of different adjacent separated cavities are arranged in a staggered mode.

9. A pole plate, characterized in that it comprises a main pole plate (2) and a pole frame according to any one of claims 1 to 8.

10. An electrolytic cell comprising the plate of claim 9.

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