Electrolytic hydrogen production equipment and hydrogen production system

Abstract

The utility model discloses electrolytic hydrogen production equipment and a hydrogen production system, and belongs to the field of electrolytic hydrogen production. The electrolytic hydrogen production equipment comprises a plurality of polar plate assemblies and a plurality of liquid inlet channels, wherein the plurality of polar plate assemblies are sequentially stacked to form a plurality of small electrolysis chambers which are separated from one another; and the at least two small electrolysis chambers are communicated with different liquid inlet channels. According to the invention, the number of the small electrolysis chambers communicated with each liquid inlet channel is reduced, the liquid outlet uniformity of the liquid inlet channels is improved, and the uniformity of flow distribution is improved.

Description

Technical Field

[0001] This application belongs to the field of electrolytic hydrogen production, and particularly relates to an electrolytic hydrogen production device and a hydrogen production system. Background Art

[0002] In the electrolytic hydrogen production devices in the related art, there is a problem of uneven flow distribution in each electrolytic cell. Especially with the progress of technology, the number of electrolytic cells in the electrolytic hydrogen production device is gradually increasing, and the problem of uneven flow distribution in each electrolytic cell is becoming more serious, affecting the overall performance of the electrolytic hydrogen production device. Summary of the Utility Model

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides an electrolytic hydrogen production device and a hydrogen production system, which can improve the uniformity of flow distribution in each electrolytic cell.

[0004] In a first aspect, this application provides an electrolytic hydrogen production device, including:

[0005] A plurality of plate assemblies, and the plurality of plate assemblies are stacked in sequence to form a plurality of spaced-apart electrolytic cells;

[0006] A plurality of liquid inlet channels, and at least two of the electrolytic cells communicate with different ones of the liquid inlet channels.

[0007] According to the electrolytic hydrogen production device provided by the embodiments of this application, by providing a plurality of liquid inlet channels, at least two of the plurality of electrolytic cells communicate with one of the plurality of liquid inlet channels, and another part of the plurality of electrolytic cells communicate with other liquid inlet channels among the plurality of liquid inlet channels, thereby reducing the number of electrolytic cells communicated with each liquid inlet channel, improving the liquid outlet uniformity of the liquid inlet channel, and improving the uniformity of flow distribution.

[0008] According to an embodiment of this application, the plurality of electrolytic cells are divided into multiple groups, and the multiple groups of electrolytic cells communicate with the plurality of liquid inlet channels in a one-to-one correspondence, and any two adjacent electrolytic cells are in different groups.

[0009] According to an embodiment of this application, the number of plate assemblies between two adjacent electrolytic cells in the same group is equal.

[0010] According to an embodiment of this application, for any group of electrolytic cells, the number of plate assemblies between two adjacent electrolytic cells in the group is equal to the number of plate assemblies between two adjacent electrolytic cells in another group.

[0011] According to an embodiment of the present application, it satisfies: L = (n - 1)L1 + nL2; where L is the distance between two adjacent electrolytic chambers in the same group, L1 is the thickness of the electrolytic chamber, L2 is the thickness of the gasket, and n is the number of groups of the electrolytic chambers.

[0012] According to an embodiment of the present application, the distance between the liquid outlet ports of the same liquid inlet channel is greater than the distance between adjacent electrolytic chambers.

[0013] According to an embodiment of the present application, the plate assembly includes:

[0014] Plates;

[0015] A pole frame surrounding the outside of the plates, the pole frame is provided with multiple groups of sub-channels, and the sub-channels corresponding to multiple plate assemblies form the liquid inlet channel, and one group of the multiple groups of sub-channels is communicated with the electrolytic chamber corresponding to its own plate assembly.

[0016] According to an embodiment of the present application, the pole frame is further provided with a notch, and one group of the multiple groups of sub-channels is communicated with the electrolytic chamber corresponding to its own plate assembly through the notch.

[0017] According to an embodiment of the present application, the notches of the pole frames in the same group are arranged at the same position, and the notches of the pole frames in different groups are arranged at different positions.

[0018] According to an embodiment of the present application, the pole frame includes two notches, one of the two notches is communicated with one of the multiple groups of sub-channels on the hydrogen side, and the other of the two notches is communicated with one of the multiple groups of sub-channels on the oxygen side.

[0019] In a second aspect, the present application further provides a hydrogen production system, including: the electrolytic hydrogen production equipment as described in any one of the above.

[0020] According to the hydrogen production system provided by the embodiment of the present application, an electrolytic hydrogen production equipment is provided. The electrolytic hydrogen production equipment reduces the number of electrolytic chambers communicated with each liquid inlet channel by providing multiple liquid inlet channels, and at least two electrolytic chambers among the multiple electrolytic chambers are communicated with one of the multiple liquid inlet channels, and another part of the electrolytic chambers among the multiple electrolytic chambers are communicated with other liquid inlet channels among the multiple liquid inlet channels, thereby improving the liquid outlet uniformity of the liquid inlet channel and the uniformity of flow distribution.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0023] Figure 1 is a schematic structural diagram of an electrolytic hydrogen production device in the related art;

[0024] Figure 2 is one of the schematic structural diagrams of the electrolytic hydrogen production device provided by the embodiment of the present application;

[0025] Figure 3 is another schematic structural diagram of the electrolytic hydrogen production device provided by the embodiment of the present application;

[0026] Figure 4 is one of the schematic structural diagrams of the bipolar frame provided by the embodiment of the present application;

[0027] Figure 5 is Figure 4 the schematic back structure diagram of the bipolar frame provided in

[0028] Figure 6 is another schematic structural diagram of the bipolar frame provided by the embodiment of the present application;

[0029] Figure 7 is Figure 6 the schematic back structure diagram of the bipolar frame provided in

[0030] Figure 8 is yet another schematic structural diagram of the bipolar frame provided by the embodiment of the present application;

[0031] Figure 9 is Figure 8 the schematic back structure diagram of the bipolar frame provided in

[0032] Figure 10 is a third schematic structural diagram of the electrolytic hydrogen production device provided by the embodiment of the present application.

[0033] Reference signs:

[0034] bipolar plate assembly 1, bipolar plate 11, oxygen-side outlet 111, hydrogen-side outlet 112, bipolar frame 12, sub-channel 121, notch 122, electrolysis cell 13, liquid inlet channel 14, gasket 15. Detailed implementation manners

[0035] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0036] Reference will be made below to Figures 2 - 10Describe an electrolytic hydrogen production device, a plate assembly 1, and a hydrogen production system according to an embodiment of the present application.

[0037] The electrolytic hydrogen production device according to an embodiment of the present application includes: Figure 3 As shown, a plurality of plate assemblies 1 and Figure 2 and Figure 10 As shown, a plurality of liquid inlet channels 14; the plurality of plate assemblies 1 are stacked in sequence to form a plurality of spaced electrolytic chambers 13; at least two electrolytic chambers 13 communicate with different liquid inlet channels 14.

[0038] Among them, the plate assembly 1 includes a plate 11 and a pole frame 12 surrounding the outside of the plate 11. The plurality of plate assemblies 1 are stacked in sequence, and the pole frame 12 and the plate 11 can be connected by welding. An electrolytic chamber 13 is formed between adjacent plates 11, adjacent pole frames 12, or adjacent plate assemblies 1. A diaphragm is provided inside the plate assembly 1, and the diaphragm divides the electrolytic chamber 13 into a hydrogen-side chamber and an oxygen-side chamber. Adjacent two plate assemblies 1 are spaced by a gasket 15.

[0039] As Figure 2 and Figure 10 As shown, the liquid inlet channel 14 is used to supply alkali liquor to the electrolytic chamber 13. There are at least two liquid inlet channels 14, and at least two of the plurality of electrolytic chambers 13 communicate with different liquid inlet channels 14 from other electrolytic chambers 13.

[0040] In the related art, as Figure 1 As shown, the electrolytic hydrogen production device is mostly provided with one liquid inlet channel 14, and the liquid inlet channel 14 communicates with a plurality of sequentially arranged electrolytic chambers 13 respectively to supply alkali liquor to the plurality of electrolytic chambers 13.

[0041] According to the electrolytic hydrogen production device provided by the embodiment of the present application, by providing a plurality of liquid inlet channels 14, at least two of the plurality of electrolytic chambers 13 communicate with one of the plurality of liquid inlet channels 14, and another part of the plurality of electrolytic chambers 13 communicate with other liquid inlet channels 14 among the plurality of liquid inlet channels 14. Compared with the electrolytic hydrogen production device having a plurality of electrolytic chambers 13 and all the electrolytic chambers 13 communicating with the same liquid inlet channel 14, by providing a plurality of liquid inlet channels 14, the number of electrolytic chambers 13 connected to each liquid inlet channel 14 can be reduced, thereby reducing the number of electrolytic chambers 13 connected to each liquid inlet channel 14, improving the liquid outlet uniformity of the liquid inlet channel 14, and improving the uniformity of flow distribution.

[0042] In some embodiments, the multiple electrolysis chambers 13 are divided into multiple groups, and the multiple groups of electrolysis chambers 13 are in one-to-one correspondence and communication with the multiple liquid inlet channels 14, and any two adjacent electrolysis chambers 13 are in different groups. The liquid inlet channel 14 is used to convey lye to the electrolysis chamber 13. Each liquid inlet channel 14 communicates with the corresponding group of electrolysis chambers 13, and the multiple groups of electrolysis chambers 13 are in one-to-one correspondence and communication with the multiple liquid inlet channels 14.

[0043] In this embodiment, as Figure 2 and Figure 10 shown, two adjacent electrolysis chambers 13 belong to different groups. The electrolysis chambers 13 of different groups can be arranged in a certain arrangement pattern successively and alternately, or the electrolysis chambers 13 of different groups are randomly alternated. The electrolysis chambers 13 of the same group are separated by the electrolysis chambers 13 of other groups. For example, Figure 2 in, the electrolysis chambers 13 labeled A are one group, the electrolysis chambers 13 labeled B are one group, the electrolysis chambers 13 labeled C are one group, and between the electrolysis chambers 13 labeled A are arranged the electrolysis chambers 13 labeled B and the electrolysis chambers 13 labeled C; Figure 10 in, the electrolysis chambers 13 labeled A are one group, the electrolysis chambers 13 labeled B are one group, and between the electrolysis chambers 13 labeled A are arranged the electrolysis chambers 13 labeled B.

[0044] The distance between two adjacent electrolysis chambers 13 in the same group is equal to the thickness of the electrolysis chambers 13 of other groups spaced therebetween plus the thickness of the gasket 15 between the adjacent plate assemblies 1.

[0045] In some embodiments, the distance between the liquid outlet ports of the same liquid inlet channel 14 is greater than the distance between adjacent electrolysis chambers 13, so as to achieve spaced liquid inlet for the electrolysis chambers 13.

[0046] In some embodiments, as Figure 2 shown, the electrolytic hydrogen production device satisfies: L=(n - 1)L1 + nL2; where L is the distance between two adjacent ones of the electrolysis chambers in the same group, L1 is the thickness of the electrolysis chamber, L2 is the thickness of the gasket, and n is the number of groups of electrolysis chambers.

[0047] Among them, the number of groups of electrolysis chambers is at least 2 groups or more.

[0048] For example, Figure 2 in, the distance between two adjacent electrolysis chambers 13 labeled A is equal to the thickness of the electrolysis chambers 13 labeled B plus the thickness of the electrolysis chambers 13 labeled C and the thickness of 3 gaskets 15 between 4 electrolysis chambers 13.

[0049] For example, Figure 10Among them, the distance between adjacent electrolytic cells 13 labeled A is equal to the thickness of the electrolytic cell 13 labeled B plus the thickness of two gaskets 15 between three electrolytic cells 13.

[0050] In the related art, as Figure 1 shown, an electrolytic hydrogen production device is provided with an additional liquid inlet channel 14. The liquid inlet channel 14 is respectively communicated with a plurality of sequentially arranged electrolytic cells 13 to supply alkaline liquid to the plurality of electrolytic cells 13. In the above structure, adjacent two electrolytic cells 13 are spaced by a gasket 15, and the distance between the liquid outlet ports of the liquid inlet channel 14 is the thickness of the gasket 15. Since the distance between the liquid outlet ports of the liquid inlet channel 14 affects the flow rate distribution, a relatively small distance between the liquid outlet ports of the liquid inlet channel 14 will cause uneven flow rate distribution of the alkaline liquid entering each electrolytic cell 13. In addition, since the liquid outlet ports of the liquid inlet channel 14 are communicated with each electrolytic cell 13, part of the current will flow through the loop formed by the liquid inlet channel 14 and the sub-channel 121 of the plate assembly 1, which is called "bypass current", resulting in the loss of effective current. And according to the resistance calculation formula R = ρ * L / S, where ρ is the resistivity, L is the current path length, and S is the cross-sectional area of the current path, the current path length is proportional to the resistance. The smaller the current path length, the smaller the resistance, the larger the bypass current, and the lower the current efficiency.

[0051] According to the electrolytic hydrogen production device provided by the embodiment of the present application, by providing a plurality of liquid inlet channels 14, the liquid outlet ports of each liquid inlet channel 14 are respectively communicated with the same group of electrolytic cells 13. Among the same group of electrolytic cells 13, adjacent two electrolytic cells 13 are separated by other groups of electrolytic cells 13. In other words, the distance between adjacent liquid outlet ports of the liquid inlet channel 14 is at least the thickness of one electrolytic cell 13 and at least the thickness of two gaskets 15. Compared with the case where the number of electrolytic cells 13 is the same and all electrolytic cells 13 are communicated with the same liquid inlet channel 14, on the one hand, by increasing the distance between adjacent two liquid outlet ports on the liquid inlet channel 14, the uniformity of the flow rate distribution among the plurality of electrolytic cells 13 is improved; on the other hand, by increasing the distance between adjacent two liquid outlet ports on the liquid inlet channel 14, the length of the current path can be increased, the resistance of the flow channel bypass can be increased, the bypass current can be reduced, and the current efficiency can be improved.

[0052] In some embodiments, as Figure 2 and Figure 10 shown, the number of plate assemblies 1 between adjacent two electrolytic cells 13 in the same group is equal.

[0053] In this embodiment, by setting the number of the plate assemblies 1 between two adjacent electrolytic chambers 13 in the same group to be equal, the distance between adjacent liquid outlets among the multiple liquid outlets on the liquid inlet channel 14 communicating with the electrolytic chambers 13 in this group can be made equal. According to the principle that the distance between liquid outlets affects the uniformity of flow distribution, the liquid outlets with equal distances can improve the uniformity of the flow rate of each liquid outlet, and further improve the uniformity of the flow distribution of the multiple electrolytic chambers 13.

[0054] Among them, the number of the plate assemblies 1 between two adjacent electrolytic chambers 13 in the same group can be 1, 2, 3 or more, and can be specifically determined according to the number of the plate assemblies 1 and the number of the liquid inlet channels 14 in the electrolytic hydrogen production equipment. For example, as Figure 2 shown, between the electrolytic chambers 13 labeled A in the same group, there are two other groups of electrolytic chambers 13, such as the electrolytic chambers 13 labeled B and the electrolytic chambers 13 labeled C, as Figure 10 shown, between the electrolytic chambers 13 labeled A in the same group, there is one other group of electrolytic chambers 13, such as the electrolytic chambers 13 labeled B.

[0055] In some embodiments, as Figure 2 and Figure 10 shown, for any group of electrolytic chambers 13, the number of the plate assemblies 1 between two adjacent electrolytic chambers 13 in the group is equal to the number of the plate assemblies 1 between two adjacent electrolytic chambers 13 in another group.

[0056] In this embodiment, the number of the plate assemblies 1 between adjacent electrolytic chambers 13 in different groups is equal, that is, the distances between two adjacent liquid outlets on different liquid inlet channels 14 are equal, and the liquid inlet structures of the multiple electrolytic chambers 13 arranged in sequence are the same, thereby improving the uniformity of the flow distribution of the multiple electrolytic chambers 13 arranged in sequence.

[0057] Exemplarily, as Figure 2As shown, the electrolytic compartments 13 labeled A form a group, the electrolytic compartments 13 labeled B form a group, and the electrolytic compartments 13 labeled C form a group. The electrolytic compartments 13 labeled A, the electrolytic compartments 13 labeled B, and the electrolytic compartments 13 labeled C are arranged alternately in sequence. Adjacent two electrolytic compartments 13 belong to different groups. There is one electrolytic compartment 13 labeled B and one electrolytic compartment 13 labeled C spaced between adjacent electrolytic compartments 13 labeled A. There is one electrolytic compartment 13 labeled A and one electrolytic compartment 13 labeled C spaced between adjacent electrolytic compartments 13 labeled B. There is one electrolytic compartment 13 labeled A and one electrolytic compartment 13 labeled B spaced between adjacent electrolytic compartments 13 labeled C. That is, the number of the plate assemblies 1 between adjacent two electrolytic compartments 13 labeled A, the number of the plate assemblies 1 between adjacent two electrolytic compartments 13 labeled B, and the number of the plate assemblies 1 between adjacent two electrolytic compartments 13 labeled C are equal.

[0058] Among them, as Figure 2 shown, the liquid inlet channel 14 labeled a supplies liquid to the electrolytic compartment 13 of the electrolytic compartment 13 labeled A, the liquid inlet channel 14 labeled b supplies liquid to the electrolytic compartment 13 of the electrolytic compartment 13 labeled B, and the liquid inlet channel 14 labeled c supplies liquid to the electrolytic compartment 13 of the electrolytic compartment 13 labeled C.

[0059] Exemplarily, as Figure 10 shown, the electrolytic compartments 13 labeled A form a group, the electrolytic compartments 13 labeled B form a group. The electrolytic compartments 13 labeled A and the electrolytic compartments 13 labeled B are arranged alternately in sequence. Adjacent two electrolytic compartments 13 belong to different groups. There is one electrolytic compartment 13 labeled B spaced between adjacent electrolytic compartments 13 labeled A. There is one electrolytic compartment 13 labeled A spaced between adjacent electrolytic compartments 13 labeled B. That is, for different groups of electrolytic compartments 13, the number of the plate assemblies 1 between adjacent two electrolytic compartments 13 labeled A is equal to the number of the plate assemblies 1 between adjacent two electrolytic compartments 13 labeled B.

[0060] In some embodiments, as Figures 3 - 9 shown, the plate assembly 1 includes: a plate 11 and a pole frame 12 surrounding the outside of the plate 11; the pole frame 12 is provided with multiple groups of sub-channels 121, and the sub-channels  121 corresponding to multiple plate assemblies 1 form the liquid inlet channel 14, and one group of the multiple groups of sub-channels 121 communicates with the electrolytic compartment 13 corresponding to the plate assembly 1 where it is located.

[0061] Among them, the electrode plate 11 and the electrode frame 12 jointly define an electrolysis chamber 13. A closed electrolysis chamber 13 is formed between adjacent electrode plate assemblies 1. Each electrode frame 12 is provided with multiple groups of sub-channels 121. The same group of sub-channels 121 corresponding to multiple electrode frames 12 are connected to form a liquid inlet channel 14, and multiple groups of sub-channels 121 on multiple electrode frames 12 are connected in a one-to-one correspondence to form multiple liquid inlet channels 14.

[0062] The structures of the electrode plate assemblies 1 where the same group of electrolysis chambers 13 are located are the same. That is, in the same group of electrode plate assemblies 1, the liquid inlet channel 14 formed by the same group of sub-channels 121 among multiple groups of sub-channels 121 is connected to the same group of electrolysis chambers 13, and one liquid inlet channel 14 supplies liquid to one group of electrolysis chambers 13.

[0063] Exemplarily, as Figure 3 shown, each electrode frame 12 is provided with 3 sub-channels 121 on the hydrogen side and 3 sub-channels 121 on the oxygen side. Multiple electrode plate assemblies 1 are stacked, and the corresponding sub-channels 121 in multiple electrode frames 12 are sequentially connected to form 3 liquid inlet channels 14 on the hydrogen side and 3 liquid inlet channels 14 on the oxygen side. Each liquid inlet channel 14 is connected to the corresponding group of electrolysis chambers 13.

[0064] Figure 4 and Figure 5 are schematic diagrams of the front and back sides of the first type of electrode plate assembly 1. Figure 6 and Figure 7 are schematic diagrams of the front and back sides of the second type of electrode plate assembly 1. Figure 8 and Figure 9 are schematic diagrams of the front and back sides of the third type of electrode plate assembly 1. The difference between electrode plate assemblies 1 with different structures lies in that the sub-channels 121 connecting different groups of electrode frames 12 to their electrolysis chambers 13 are different. Exemplarily, as Figure 4 shown, among the 3 sub-channels 121 on the right side, the rightmost sub-channel 121 is connected to its electrolysis chamber 13; as Figure 6 shown, among the 3 sub-channels 121 on the right side, the middle sub-channel 121 is connected to its electrolysis chamber 13; as Figure 8 shown, among the 3 sub-channels 121 on the right side, the leftmost sub-channel 121 is connected to its electrolysis chamber 13.

[0065] The electrode frames 12 of the same group of electrode plate assemblies 1 have the same structure. When the sub-channels 121 are all supplied with liquid, the sub-channels 121 connecting the same group of electrode plate assemblies 1 to the electrolysis chambers 13 are the same, that is, the same liquid inlet channel 14 supplies liquid to the same group of electrolysis chambers 13.

[0066] In some embodiments, such as Figures 3 - 9As shown, each bipolar plate frame 12 includes a plurality of sub-channels 121 on the hydrogen side and a plurality of sub-channels 121 on the oxygen side. The sub-channels 121 on the hydrogen side and the sub-channels 121 on the oxygen side are distributed on both sides of the bipolar plate frame 12. The liquid inlet channels 14 are also divided into a plurality of liquid inlet channels 14 on the hydrogen side and a plurality of liquid inlet channels 14 on the oxygen side.

[0067] In some embodiments, the bipolar plate frame 12 is further provided with a notch 122, and one group of the multiple groups of sub-channels 121 communicates with the corresponding electrolytic cell 13 of the bipolar plate assembly 1 where it is located through the notch 122.

[0068] In this embodiment, the notch 122 is a channel connecting the sub-channel 121 and the electrolytic cell 13. In the multiple bipolar plate assemblies 1 stacked in sequence, each bipolar plate frame 12 is provided with a notch 122, and the notch 122 is used to connect the corresponding electrolytic cell 13 and the liquid inlet channel 14 of the bipolar plate assembly 1 where it is located.

[0069] In some embodiments, the notches of the same group of bipolar plate frames are set at the same position, and the notches 122 of different groups of bipolar plate frames 12 are set at different positions to enable the same liquid inlet channel 14 to communicate with the same type of electrolytic cell 13.

[0070] In some embodiments, as Figures 3 - 9 shown, the bipolar plate frame 12 is provided with an oxygen-side outlet 111 and a hydrogen-side outlet 112. The oxygen-side outlet 111 is used to discharge oxygen, and the hydrogen-side outlet 112 is used to discharge hydrogen.

[0071] In some embodiments, the structures of the bipolar plate assemblies 1 where the same group of electrolytic cells 13 are located are the same, that is, in the same group of bipolar plate assemblies 1, the same group of sub-channels 121 among the multiple groups of sub-channels 121 of the bipolar plate frame 12 communicate with the formed electrolytic cell 13. Among the multiple liquid inlet channels 14 formed by the multiple groups of bipolar plate assemblies 1, each liquid inlet channel 14 communicates with the corresponding group of electrolytic cells 13.

[0072] In some embodiments, a group of sub-channels 121 communicating with the corresponding electrolytic cell 13 of the bipolar plate assembly 1 where it is located communicates with the corresponding electrolytic cell 13 through a notch 122 provided in the bipolar plate frame 12.

[0073] In this embodiment, one end of the notch 122 communicates with the sub-channel 121, and the other end of the notch 122 communicates with the electrolytic cell 13.

[0074] According to the electrode plate assembly 1 provided by the embodiments of the present application, by providing a plurality of liquid inlet channels 14, at least two of the plurality of electrolytic chambers 13 are in communication with one of the plurality of liquid inlet channels 14, and another part of the plurality of electrolytic chambers 13 is in communication with other liquid inlet channels 14 among the plurality of liquid inlet channels 14, thereby reducing the number of electrolytic chambers 13 communicated with each liquid inlet channel 14, improving the liquid outlet uniformity of the liquid inlet channel 14, and improving the uniformity of flow rate distribution.

[0075] In some embodiments, as Figures 4 - 9 shown, each electrode frame 12 includes a plurality of sub-channels 121 on the hydrogen side and a plurality of sub-channels 121 on the oxygen side. The sub-channels 121 on the hydrogen side and the sub-channels 121 on the oxygen side are distributed on both sides of the electrode frame 12, and the liquid inlet channels 14 are also divided into a plurality of liquid inlet channels 14 on the hydrogen side and a plurality of liquid inlet channels 14 on the oxygen side.

[0076] In some embodiments, the electrode frame 12 may include two notches 122. One of the two notches 122 is in communication with one of the multiple groups of sub-channels 121 on the hydrogen side, and the other notch 122 of the two notches 122 is in communication with one of the multiple groups of sub-channels 121 on the oxygen side. The structures of the electrode plate assemblies 1 where the electrolytic chambers 13 of the same group are located are the same, that is, in the same group of electrode plate assemblies 1, the positions where the notches 122 are provided are the same. Among the multiple liquid inlet channels 14 formed by the multiple groups of sub-channels 121, the notch 122 in the electrode frame 12 where the electrolytic chambers 13 of the same group are located is in communication with the sub-channel 121 at the same position.

[0077] The embodiments of the present application further provide a hydrogen production system, including: the electrolytic hydrogen production device in any of the above embodiments.

[0078] According to the hydrogen production system provided by the embodiments of the present application, by adopting the electrolytic hydrogen production device in any of the embodiments, the electrolytic hydrogen production device is provided with a plurality of electrode plate assemblies 1, the plurality of electrode plate assemblies 1 form a plurality of liquid inlet channels 14, the liquid outlet of each liquid inlet channel 14 is respectively in communication with the electrolytic chambers 13 of the same group, and the distance between adjacent liquid outlets of the liquid inlet channel 14 is at least the thickness of one electrolytic chamber 13 and the thickness of at least two gaskets 15, improving the uniformity of flow rate distribution among the plurality of electrolytic chambers 13, increasing the length of the current path, increasing the flow path bypass resistance, reducing the bypass current, and contributing to the improvement of the current efficiency.

[0079] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0080] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0081] In the description of this application, "the first feature", "the second feature" may include one or more of such features.

[0082] In the description of this application, "a plurality of" means two or more.

[0083] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0084] In the description of this application, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal level than the second feature.

[0085] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0086] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. An electrolytic hydrogen production device, characterized in that, Comprising: A plurality of plate assemblies, and the plurality of plate assemblies are sequentially stacked to form a plurality of spaced electrolytic chambers; A plurality of liquid inlet channels, and at least two of the electrolytic chambers communicate with different ones of the liquid inlet channels.

2. The electrolytic hydrogen production device according to claim 1, characterized in that, The plurality of electrolytic chambers are divided into multiple groups, and the multiple groups of electrolytic chambers communicate with the plurality of liquid inlet channels in a one-to-one correspondence, and any two adjacent electrolytic chambers are in different groups.

3. The electrolytic hydrogen production device according to claim 2, wherein, The number of plate assemblies between two adjacent electrolytic chambers in the same group is equal.

4. The electrolytic hydrogen production device according to claim 2, characterized in that, For any group of electrolytic chambers, the number of plate assemblies between two adjacent electrolytic chambers in the group is equal to the number of plate assemblies between two adjacent electrolytic chambers in another group.

5. The electrolytic hydrogen production equipment according to claim 2, wherein Satisfying: L=(n - 1)L1 + nL2; wherein, L is the distance between two adjacent electrolytic chambers in the same group, L1 is the thickness of the electrolytic chamber, L2 is the thickness of the gasket, and n is the number of groups of the electrolytic chambers.

6. The electrolytic hydrogen production device according to claim 1, wherein, The distance between the liquid outlet ports of the same liquid inlet channel is greater than the distance between adjacent electrolytic chambers.

7. The electrolytic hydrogen production device according to any one of claims 1-6, characterized in that, The plate assembly includes: A plate; A pole frame surrounding the outside of the plate, the pole frame is provided with multiple groups of sub-channels, and the sub-channels corresponding to the plurality of plate assemblies form the liquid inlet channel, and one group of the multiple groups of sub-channels communicates with the electrolytic chamber corresponding to its own plate assembly.

8. The electrolytic hydrogen production device according to claim 7, characterized in that The pole frame is further provided with a notch, and one group of the multiple groups of sub-channels communicates with the electrolytic chamber corresponding to its own plate assembly through the notch.

9. The electrolytic hydrogen production device according to claim 8, characterized in that, The notches of the pole frames in the same group are arranged at the same position, and the notches of the pole frames in different groups are arranged at different positions.

10. A hydrogen production system, characterized in that, Comprising: The electrolytic hydrogen production device according to any one of claims 1-9 above.

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