CN114689671A

CN114689671A - Electrochemical reaction apparatus

Info

Publication number: CN114689671A
Application number: CN202210320186.3A
Authority: CN
Inventors: 陶华冰; 陶勇冰; 郑南峰
Original assignee: Tan Kah Kee Innovation Laboratory
Current assignee: Ludao Hydrogen Energy Xiamen Technology Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-01
Anticipated expiration: 2042-03-29
Also published as: WO2023184978A1; CN114689671B

Abstract

The present disclosure provides an electrochemical reaction apparatus including: a frame; the electrochemical device is arranged on the rack and comprises a first polar plate and a second polar plate, the first polar plate is provided with a first reaction cavity, the second polar plate is provided with a second reaction cavity, and the first reaction cavity and the second reaction cavity form a reaction space of an electrochemical reaction; and the storage device comprises a storage part, the storage part is provided with a first accommodating cavity, a second accommodating cavity, a first fluid inlet and a second fluid inlet, the first accommodating cavity and the second accommodating cavity form a communicator structure and form a storage space for storing liquid required by electrolytic reaction, the first fluid inlet is communicated with the first reaction cavity and the first accommodating cavity and is configured to introduce an electrolytic product of the first polar plate into the first accommodating cavity, and the second fluid inlet is communicated with the second reaction cavity and the second accommodating cavity and is configured to introduce an electrolytic product of the second polar plate into the second accommodating cavity. The present disclosure can meet the safety requirements for the separation of different electrode products.

Description

Electrochemical reaction apparatus

Technical Field

The present disclosure relates to the field of electrochemical technologies, and in particular, to an electrochemical reaction apparatus.

Background

Electrochemical techniques have extremely wide application in the industries of energy, chemical industry, water treatment and the like, and an electrochemical test system comprises a plurality of components, such as an electrolytic cell, a product separation system, a frame, an electrical control system and the like.

As the core of an electrochemical testing system, an electrolytic cell is composed of a plurality of components with different functions, so as to realize the requirements of uniform distribution of reactants, separation of products and electrode materials, good electrical contact of electrode components, material isolation of a cathode chamber and an anode chamber, isolation of the electrolytic cell from the outside and the like, and the requirements of balancing and optimizing various performances are required to realize the best overall performance. Two electrodes of the electrolytic cell can respectively generate products with different properties, such as oxidation products generated by an anode and reduction products generated by a cathode, and the production mostly needs to obtain electrode products with higher purity, wherein the sealing between the anode and the cathode and the sealing between the electrolytic cell and the outside are very important.

The electrolytic cell commonly used in industry is composed of at least two flat electrodes, and the structural optimization of the electrolytic cell assembly can provide powerful support for efficient production, test and research and development. For assembly, testing and production, the electrolytic cell needs to be easily disassembled and assembled, easily sealed, and capable of easily forming good internal electrical contact to reduce the internal resistance of the electrolytic cell.

In production-oriented electrolysis, the energy conversion efficiency is the most important technical parameter, and the energy conversion efficiency of the electrolytic cell is determined by the impedance of the electrolytic cell, including the internal resistance of the electrolytic cell, the activity of the catalyst and the mass transfer impedance. For example, PEM (proton exchange membrane) electrolyzers, which produce hydrogen and oxygen using pure water as a reactant, are highly efficient electrochemical energy storage technologies. The anode of the PEM electrolytic cell needs to be uniformly filled with pure water, the cathode and anode chambers often reach certain working pressure, the electrolytic cell can reach a plurality of current densities above A/cm2, and the performance of the electrolytic cell is very sensitive to assembly conditions. In the assembly of PEM electrolyzers, a reasonable structural design can facilitate production and research personnel to complete the assembly of low impedance electrolyzers and form good sealing, so as to realize the optimization of the performance of the electrolyzers and avoid the leakage of fluid. For example, an alkaline electrolytic cell, which uses an alkaline solution as an electrolyte and a reactant to generate hydrogen and oxygen, is a low-cost electrochemical energy storage technology. For example, in a chlor-alkali electrolytic cell, an electrolyte containing NaCl needs to be introduced into an anode, an alkaline electrolyte needs to be introduced into a cathode, chlorine gas is generated at the anode, hydrogen gas is generated at the cathode, and both gas products are dangerous gases, so that the chlor-alkali electrolytic cell is a basic electrochemical production industry. The cathode and anode gas products in these reaction cases are mixed and have the possibility of explosion, and all of them generate dangerous gas, such as hydrogen, which is the gas most prone to leakage. The process scale is large, and the optimization of energy efficiency is important in production and development.

During the research process of the electrolytic cell material and the assembly process, the work of screening the material, optimizing the process condition and the like needs to be realized through a proper cell structure. According to the related technology known by the inventor, the current electrolytic cell structure has the problems of inconvenient assembly, poor performance repeatability, high error rate and the like, and the conditions of overhigh impedance and fluid leakage are easy to occur during the assembly of the electrolytic cell, so that the electrolytic cell has poor performance and even cannot run safely. For example, when two polar plates are connected by a threaded connector, due to the lack of a device for fixing the polar plates, the constraint is usually required to be respectively applied from two sides of the two polar plates, so that the operation of a tester is inconvenient, and the assembly efficiency of the electrolytic cell is reduced; moreover, the electrolytic cells assembled in the above manner by persons with different operating experiences often differ in structure, which may lead to poor reproducibility of test results.

The two electrodes of the electrolytic cell can respectively produce products with different properties, such as oxidizing gas generated by an anode and reducing gas generated by a cathode, and the production mostly needs to obtain electrode products with higher purity. Therefore, the reaction system is often required to be equipped with a gas-liquid management system to achieve separation and purification of the product. A good gas-liquid management system is important for safe and efficient operation of system equipment.

In addition, the electrochemical reactor requires precise control of reactant flow, temperature, pressure, and assembly conditions, etc., for assembly, testing, and production. For example, in a PEM (proton exchange membrane) electrolytic water reaction, pure water needs to be introduced into an anode, oxygen is generated by the anode and mixed with the introduced pure water in the electrolytic process, a small amount of liquid is carried in the cathode, and products of two electrodes need to be separated to a certain degree so as to meet the purity requirement of a gas product; in the alkaline electrolyzed water reaction system, alkaline electrolyte with certain concentration is required to be introduced into an anode and a cathode, oxygen is generated at the anode, hydrogen is generated at the cathode, but gas products are mixed with the electrolyte, a gas-liquid separation system is required to separate purer gas products, and the electrolyte is required to be circulated back to an electrolytic cell; in an electrolytic reaction system in the chlor-alkali process, an electrolyte containing NaCl needs to be introduced into an anode, an electrolyte needs to be introduced into a cathode, chlorine is generated at the anode, hydrogen is generated at the cathode, gas products are mixed with the electrolyte, a gas-liquid separation system is needed to separate purer gas products, and the electrolyte is circulated back to an electrolytic cell. In these reaction cases, the mixed gas products of the cathode and anode may explode, and therefore a special gas-liquid management system is required to meet the safety requirement.

At present, a suitable commercial test bench is lacked in the market, the test bench is often manually built by research personnel, and a non-professional test tool, an unreasonable mechanism and a material can cause poor repeatability and high error rate of test data, and the research result is inaccurate, so that technical progress is severely limited.

Disclosure of Invention

The purpose of this disclosure is to provide an electrochemical reaction device, which can satisfy the safety requirement of different electrode product separation.

A first aspect of the present disclosure provides an electrochemical reaction apparatus including:

a frame;

the electrochemical device is arranged on the rack and comprises a first polar plate and a second polar plate with the polarity opposite to that of the first polar plate, the first polar plate is provided with a first reaction cavity, the second polar plate is provided with a second reaction cavity, and the first reaction cavity and the second reaction cavity form a reaction space of an electrochemical reaction; and

the storage device is installed on the rack and comprises a storage part, the storage part is provided with a first containing cavity, a second containing cavity, a first fluid inlet and a second fluid inlet, the first containing cavity and the second containing cavity form a communicating vessel structure and form a storage space for storing liquid required by electrolytic reaction, the first fluid inlet is communicated with the first reaction cavity and the first containing cavity and is configured to introduce the electrolytic product of the first polar plate into the first containing cavity, and the second fluid inlet is communicated with the second reaction cavity and the second containing cavity and is configured to introduce the electrolytic product of the second polar plate into the second containing cavity.

According to some embodiments of the present disclosure, the storage part includes a partition wall through which the first accommodation chamber and the second accommodation chamber are partitioned, and a bottom of the partition wall is provided with a communication port to communicate the first accommodation chamber and the second accommodation chamber.

According to some embodiments of the present disclosure, the first accommodating chamber and the second accommodating chamber are arranged side by side along a first direction and extend along a second direction perpendicular to the first direction, a dimension of the first accommodating chamber in the second direction is larger than a dimension of the first accommodating chamber in the first direction, and a dimension of the second accommodating chamber in the second direction is larger than a dimension of the second accommodating chamber in the first direction.

In accordance with some embodiments of the present disclosure,

the reservoir further having a fluid supply port configured to supply the liquid to the reaction space;

the electrochemical reaction apparatus further includes a fluid driving device configured to transfer the liquid stored in the storage space to the reaction space through the fluid supply port.

According to some embodiments of the present disclosure, the liquid is water, the fluid supply port is communicated with the second receiving chamber, the second fluid inlet is disposed at a top of the second receiving chamber, the second fluid inlet is configured to introduce the electrolysis product of the second electrode plate and the liquid flowing back from the reaction space to the storage space to the second receiving chamber, and the first fluid inlet is configured to introduce the electrolysis product of the first electrode plate and the liquid flowing back from the reaction space to the storage space to the first receiving chamber.

According to some embodiments of the present disclosure, the electrochemical reaction apparatus further comprises:

a motor, which is in driving connection with the fluid driving device and is configured to provide power required for conveying the liquid to the fluid driving device; and

a motor control module in signal connection with the motor and configured to send a control signal to the motor that adjusts the steering and rotational speed of the motor.

According to some embodiments of the present disclosure, the first fluid inlet is disposed at an upper portion of the first receiving chamber, and the second fluid inlet is disposed at a top portion of the second receiving chamber.

According to some embodiments of the present disclosure, the storage device includes a plurality of the storage portions, the first receiving cavity and the second receiving cavity of each of the storage portions are arranged side by side in a first direction, and the storage portions are arranged side by side in the first direction.

According to some embodiments of the present disclosure, the storage device includes a storage device body and a top cover, the first accommodating cavity and the second accommodating cavity of each storage portion are disposed in the storage device body, the top cover is disposed at a top end of the storage device body, and the top cover is shared by a plurality of storage portions.

According to some embodiments of the disclosure, the storage device further comprises:

a first exhaust device connected to the first accommodating chamber and configured to exhaust the gaseous electrolysis products of the first electrode plate stored in the first accommodating chamber; and

and the second exhaust device is connected to the second accommodating cavity and is configured to exhaust the gaseous electrolysis products of the second electrode plate stored in the second accommodating cavity.

According to some embodiments of the present disclosure, the first exhaust apparatus includes a first exhaust pipe having one end connected to a top end of the first accommodation chamber and a first cooling device disposed on the first exhaust pipe, the first cooling device is configured to cool fluid in the first exhaust pipe, the second exhaust apparatus includes a second exhaust pipe having one end connected to a top end of the second accommodation chamber and a second cooling device disposed on the second exhaust pipe, and the second cooling device is configured to cool fluid in the second exhaust pipe.

According to some embodiments of the present disclosure, the storage device further comprises a sampling device in communication with at least one of the first and second receiving cavities configured to expel the liquid within the storage space to obtain a test sample of the liquid.

According to some embodiments of the present disclosure, the sampling device includes a sampling tube connected to the bottom end of the first accommodating chamber and a sampling valve disposed on the sampling tube, and the sampling valve is configured to control on/off of the sampling tube.

According to some embodiments of the disclosure, the storage device further includes a liquid level control device disposed on the storage portion, the storage portion further has a third fluid inlet communicating with at least one of the first receiving chamber and the second receiving chamber, the liquid level control device is configured to detect a liquid level of the liquid in the storage space, and replenish the liquid into the storage space through the third fluid inlet when the liquid level of the liquid in the storage space is lower than a preset liquid level.

a temperature detection device configured to detect a temperature of the liquid within the storage space;

a heating device configured to heat the liquid within the storage space; and

the temperature control module is in signal connection with the temperature detection device and the heating device and is configured to send a control signal for heating the liquid to the heating device when the temperature of the liquid in the storage space is lower than a preset temperature until the liquid reaches the preset temperature.

According to some embodiments of the present disclosure, the storage part further has a first connection structure configured to mount the temperature detection device on the storage part and a second connection structure configured to mount the heating device on the storage part, the second connection structure being disposed at a bottom of the storage space, the first connection structure being disposed above the second connection structure.

According to some embodiments of the present disclosure, the electrochemical device includes a plurality of electrochemical devices arranged on the rack at intervals, the storage device includes a plurality of storage portions, and the storage spaces of the plurality of storage portions are in one-to-one correspondence with the reaction spaces of the plurality of electrochemical devices.

the power supply comprises a plurality of power supply units which are arranged in one-to-one correspondence with the plurality of electrochemical devices, and the power supply units are electrically connected with the first polar plate and the second polar plate; and

the internal resistance testing device comprises a plurality of internal resistance testing units which are arranged in one-to-one correspondence with the plurality of electrochemical devices, and the internal resistance testing units are configured to detect the internal resistance of the electrochemical devices in the electrochemical reaction process.

According to some embodiments of the disclosure, the electrochemical device further comprises:

a fixed part; and

a plurality of first connectors connected to the fixing portion, the plurality of first connectors being configured to fixedly mount the first and second electrode plates on the fixing portion such that the first and second reaction chambers form the reaction space.

According to some embodiments of the present disclosure, the electrochemical device further comprises a mounting seat on which the fixing part is mounted, the mounting seat being provided with at least one first fluid port communicating with the reaction space, the at least one first fluid port being configured to introduce or lead a fluid into or out of the reaction space.

According to some embodiments of the disclosure, the fixing portion is provided with a first limiting structure, the mount is provided with a second limiting structure, and the fixing portion is mounted on the mount through the first limiting structure and the second limiting structure so as to limit the position of the reaction space relative to the at least one first fluid port by limiting the position of the fixing portion relative to the mount.

According to some embodiments of the present disclosure, the first limit structure and the second limit structure are concave-convex fitting structures.

In accordance with some embodiments of the present disclosure,

the first connecting pieces penetrate through the first polar plate and the second polar plate in sequence and are connected with the fixing part;

the first limiting structure comprises a groove penetrating through the fixing part, the second limiting structure comprises a boss matched with the groove, the at least one first fluid port is formed in the end face of the boss, the end face of one side, close to the mounting seat, of the second pole plate is provided with at least one second fluid port connected with the at least one first fluid port in a one-to-one correspondence mode, and the at least one second fluid port is communicated with the reaction space.

According to some embodiments of the present disclosure, each of the first fluid ports is in contact with a corresponding of the second fluid ports, the electrochemical device further comprising a sealing member disposed between each of the first fluid ports and the corresponding second fluid ports.

In accordance with some embodiments of the present disclosure,

the first connecting piece comprises a threaded connecting piece, and the fixing part is provided with a plurality of first threaded connecting holes corresponding to the plurality of first connecting pieces;

first limit structure is including running through the recess of fixed part, second limit structure include with recess complex boss, the recess is the rectangle through groove, the boss is the cuboid structure, a plurality of first threaded connection hole distribute in the width direction's of recess both sides are in order to dodge the recess.

In accordance with some embodiments of the present disclosure,

the first pole plate is provided with a plurality of first through holes which correspond to the first threaded connecting holes and are used for penetrating through the first connecting piece, the first reaction cavity forms a square distribution region, the first through holes are arranged on the periphery of the distribution region of the first reaction cavity and form a square distribution region so as to avoid the first reaction cavity, and the distribution region of the first reaction cavity and the distribution region of the first through holes are arranged in an included angle manner;

the second pole plate is provided with what a plurality of first threaded connection hole correspond is used for wearing to establish a plurality of second through-holes of first connecting piece, the second reaction chamber forms the distribution area of square, the second through-hole set up in just form the distribution area of square around the distribution area of second reaction chamber, in order to dodge the second reaction chamber, the distribution area of second reaction chamber with the distribution area of second through-hole sets up with becoming the contained angle.

According to some embodiments of the present disclosure, the electrochemical device further includes an electrolyte membrane installed between the first reaction chamber and the second reaction chamber.

In accordance with some embodiments of the present disclosure,

the electrolyte membrane is a proton exchange membrane;

the reservoir further having a fluid supply port configured to supply water to the reaction space;

the first fluid port comprises a first fluid inlet connected to the second fluid inlet and a first fluid outlet connected to the fluid supply port, the second fluid port comprises a second fluid inlet and a second fluid outlet in communication with the second reaction chamber, the second fluid inlet is in communication with the first fluid outlet and is configured to direct water into the second reaction chamber, and the second fluid outlet is in communication with the first fluid inlet and is configured to direct water and oxygen out of the second reaction chamber;

the first plate is provided with a third fluid port communicated with the first reaction cavity, and the third fluid port is configured to lead hydrogen out of the first reaction cavity.

According to some embodiments of the present disclosure, the electrochemical device further comprises a flow conduit, a first end of the flow conduit connected to the third fluid port, a second end of the flow conduit connected to the first fluid inlet.

According to some embodiments of the present disclosure, the electrochemical device further comprises a second connector configured to fixedly mount the fixing part on the mount.

In the electrochemical reaction equipment provided by the disclosure, a first accommodating cavity and a second accommodating cavity of a storage device form a communicating vessel structure, a state that a certain volume of liquid is stored in the first accommodating cavity and the second accommodating cavity is adopted, the liquid level of the liquid in the first accommodating cavity and the liquid level of the liquid in the second accommodating cavity are balanced and form a liquid seal, and two spaces which are not communicated with each other are formed on the liquid level of the first accommodating cavity and the liquid level of the second accommodating cavity. When the electrolysis products of the first polar plate and the second polar plate both contain gas, in the process of electrolysis reaction, the gaseous electrolysis products of the first polar plate and the second polar plate respectively enter two spaces which are not communicated with each other, so that the gaseous electrolysis products of different electrodes can be prevented from being mixed, for example, when water is electrolyzed, hydrogen and oxygen can be prevented from being mixed, and the risk of explosion is reduced. Moreover, the structure is convenient for collecting or sampling gaseous electrolysis products of different electrodes.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a schematic structural view of an electrochemical reaction apparatus according to some embodiments of the present disclosure.

Fig. 2 is a schematic structural diagram of a storage device according to some embodiments of the present disclosure.

Fig. 3 is a schematic cross-sectional view of the storage device shown in fig. 2.

Fig. 4 is a control schematic diagram of a temperature control module and a motor control module of an electrochemical reaction apparatus according to some embodiments of the present disclosure.

Fig. 5 is a schematic structural view of an electrochemical device according to some embodiments of the present disclosure.

Fig. 6 is an exploded structural view of the electrochemical device shown in fig. 5.

Fig. 7 is a schematic structural view of a first plate of the electrochemical device shown in fig. 5.

Fig. 8 is a schematic view of the structure of the second plate of the electrochemical device shown in fig. 5.

Fig. 9 is a schematic structural view of a fixing portion and a mounting seat of the electrochemical device shown in fig. 1 in an assembled state.

In fig. 1 to 9, each reference numeral represents:

1. a frame; 11. a viewing port;

2. an electrochemical device; 21. a first electrode plate; 211. a first reaction chamber; 212. a third fluid port; 213. a first projecting portion; 214. a first connection hole; 215. a first through hole; 22. a second polar plate; 221. a second reaction chamber; 222. a first flow passage; 223. a second flow passage; 224. a second projection; 225. a second connection hole; 226. a second through hole; 23. a fixed part; 231. a groove; 232. a first threaded connection hole; 233. a second threaded connection hole; 24. a first connecting member; 25. a flow guide seat; 251. a boss; 252. a first liquid outlet; 253. a first liquid inlet; 254. a third through hole; 26. a flow guide pipe; 27. a third connecting member;

3. a storage device; 31. a storage device body; 311. a first accommodating chamber; 312. a second accommodating chamber; 313. a fluid supply port; 314. a second fluid inlet; 315. a first fluid outlet; 316. a second fluid outlet; 317. a third fluid outlet; 318. a first fluid inlet; 319. a third fluid inlet; 310. a communication port; 32. a first exhaust device; 33. a second exhaust device; 34. a sampling device; 35. a first connecting structure; 36. a second connecting structure; 37. a top cover; x, a first direction; z, a second direction; y, a third direction; s, a partition wall;

4. an internal resistance testing device;

51. a temperature detection device; 52. a heating device;

61. a fluid driving device; 62. a motor;

7. a control device; 71. a temperature control module; 72. and a motor control module.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in fig. 1 to 9, some embodiments of the present disclosure provide an electrochemical reaction apparatus including a housing 1, an electrochemical device 2, and a storage device 3. The electrochemical reaction apparatus can be used as a test apparatus as well as a production apparatus.

The electrochemical device 2 is mounted on the housing 1. The electrochemical device 2 comprises a first polar plate 21 and a second polar plate 22 with opposite polarity to the first polar plate 21, the first polar plate 21 is provided with a first reaction chamber 211, the second polar plate 22 is provided with a second reaction chamber 221, and the first reaction chamber 211 and the second reaction chamber 221 form a reaction space for electrochemical reaction.

The reaction rate of the electrochemical reaction is generally slow, and in order to improve the testing efficiency or the production efficiency, the electrochemical reaction apparatus may include a plurality of electrochemical devices 2, and the plurality of electrochemical devices 2 may perform a plurality of sets of electrochemical reactions with the same or different test parameters simultaneously, without interfering with each other.

The electrochemical device 2 can be used as different types of electrochemical reactors according to different use requirements. For example, the electrochemical device may be one of the following: proton exchange membrane water electrolysis device, alkaline water electrolysis device, chlor-alkali electrolytic cell, fuel cell, flow battery.

The storage device 3 is mounted on the frame 1. The storage device 3 includes a storage part having a first receiving chamber 311, a second receiving chamber 312, a first fluid inlet 318 and a second fluid inlet 314, the first receiving chamber 311 and the second receiving chamber 312 forming a communicator structure and constituting a storage space for storing a liquid required for an electrolytic reaction, the first fluid inlet 318 communicating with the first reaction chamber 211 and the first receiving chamber 311 and configured to introduce an electrolysis product of the first electrode plate 21 into the first receiving chamber 311, and the second fluid inlet 314 communicating with the second reaction chamber 221 and the second receiving chamber 312 and configured to introduce an electrolysis product of the second electrode plate 22 into the second receiving chamber 312.

For example, in performing a PEM electrolyzed water test, the first plate may be a cathode plate, the second plate may be an anode plate, the first fluid inlet may be for the electrolysis product hydrogen introduced to the cathode, and the second fluid inlet may be for the electrolysis product oxygen introduced to the anode.

For another example, in conducting an electrolytic NaCl solution test, the first plate may be a cathode plate and the second plate may be an anode plate, and the first fluid inlet may be for introducing the electrolysis product hydrogen gas at the cathode and the second fluid inlet may be for introducing the electrolysis product chlorine gas at the anode.

Of course, in the case where the electrolysis products of the electrodes and the liquid required for the electrolysis reaction are mixed with each other, the first fluid inlet 318 is not limited to the electrolysis products introduced into the first plate 21, the second fluid inlet 314 is not limited to the electrolysis products introduced into the second plate 22, and the first fluid inlet 318 and the second fluid inlet 314 may also be used to introduce the liquid required for the electrolysis reaction into the storage space.

In the electrochemical reaction apparatus provided by the embodiment of the present disclosure, a first accommodating chamber and a second accommodating chamber of the storage device form a communicating vessel structure, and in a state where a certain volume of liquid is stored in the first accommodating chamber and the second accommodating chamber, liquid levels of the liquid in the first accommodating chamber and the second accommodating chamber are balanced and form a liquid seal, and two spaces that are not communicated with each other are formed above a liquid level of the first accommodating chamber and above a liquid level of the second accommodating chamber. When the electrolysis products of the first polar plate and the second polar plate both contain gas, in the process of electrolysis reaction, the gaseous electrolysis products of the first polar plate and the second polar plate respectively enter two spaces which are not communicated with each other, so that the gaseous electrolysis products of different electrodes can be prevented from being mixed, for example, when water is electrolyzed, hydrogen and oxygen can be prevented from being mixed, and the risk of explosion is reduced. Moreover, the structure is convenient for collecting or sampling gaseous electrolysis products of different electrodes.

In some embodiments, as shown in fig. 3, the storage part includes a partition wall S through which the first receiving chamber 311 and the second receiving chamber 312 are partitioned, and a bottom of the partition wall S is provided with a communication port 310 to communicate the first receiving chamber 311 and the second receiving chamber 312.

In this embodiment, when the liquid level of the liquid in the storage space is higher than the top edge of the communication port 310, two spaces that are not communicated with each other may be formed above the liquid level of the first accommodating chamber and above the liquid level of the second accommodating chamber. That is, by providing the communication port 310 at the bottom of the partition wall, as the electrolytic reaction proceeds and the liquid is consumed, the liquid can form a liquid seal in the first accommodation chamber and the second accommodation chamber even if the remaining liquid in the storage space is small, thereby continuously functioning to prevent the gaseous electrolytic products of the different electrodes from being mixed. In addition, compared with the case where the communication ports are formed in the bottom surfaces of the first accommodating chamber and the second accommodating chamber, the communication port 310 is formed in the partition wall in the present embodiment, which is structurally simpler and more reliable.

As shown in fig. 3, the partition wall may be formed integrally with the other chamber walls forming the first containing chamber and the second containing chamber. To facilitate the machining of the communication port 310, the partition wall may also be formed separately from the other chamber walls forming the first accommodation chamber and the second accommodation chamber and then connected to the other chamber walls.

In some embodiments, the first receiving cavity 311 and the second receiving cavity 312 are arranged side by side along the first direction X, and the first receiving cavity 311 and the second receiving cavity 312 extend along a second direction Z perpendicular to the first direction, a dimension of the first receiving cavity 311 in the second direction Z is larger than a dimension of the first receiving cavity 311 in the first direction X, and a dimension of the second receiving cavity 312 in the second direction Z is larger than a dimension of the second receiving cavity 312 in the first direction X.

For example, in the embodiment shown in fig. 2 and 3, the first accommodating chamber and the second accommodating chamber are rectangular parallelepiped structures, the first direction X corresponds to the length direction of the first accommodating chamber and the second accommodating chamber, the second direction Z corresponds to the height direction of the first accommodating chamber and the second accommodating chamber, the third direction Y corresponds to the width direction of the first accommodating chamber and the second accommodating chamber, and the liquid level of the liquid is perpendicular to the second direction Z in the use state of the storage device. In some embodiments, not shown, the first and second receiving cavities may also be of prismatic or cylindrical configuration.

In this embodiment, on the basis that the communication port 310 is provided at the bottom of the partition wall, by making the size of the first accommodating chamber 311 in the second direction Z larger than the size of the first accommodating chamber 311 in the first direction X, and making the size of the second accommodating chamber 312 in the second direction Z larger than the size of the second accommodating chamber 312 in the first direction X, the bottom areas of the first accommodating chamber and the second accommodating chamber are small and the height thereof is large, and even if the remaining liquid in the storage space is small, the liquid in the storage space can be maintained at a certain level to form a liquid seal.

In some embodiments, as shown in fig. 2-4, the reservoir further has a fluid supply port 313, the fluid supply port 313 being configured to supply liquid to the reaction space. The storage device further comprises a fluid driving device 61, the fluid driving device 61 being configured to deliver the liquid stored in the storage space to the reaction space through the fluid supply port 313.

The fluid driving device 61 may be a pump, such as a peristaltic pump. In the embodiment shown in fig. 2 and 3, when the fluid supply port 313 is disposed at the top of the first receiving cavity 311, the storage device may further include a delivery pipe extending to the bottom of the storage space so as to discharge the liquid.

For the electrolytic reaction to occur in some electrochemical devices provided with an electrolyte membrane, it is only necessary to supply a liquid to one of the first reaction chamber and the second reaction chamber and form a liquid circulation, and the liquid may permeate from one electrode to the other electrode through the electrolyte membrane during the electrolytic reaction, causing an additional loss of the liquid. For example, in the PEM electrolysis water test, only water as a liquid is supplied to the anode of the electrolytic cell and forms a water cycle, the anode generates oxygen and protons, the protons permeate through the proton exchange membrane to the cathode and generate hydrogen, and during the electrolysis process, a part of water at the anode permeates through the proton exchange membrane to the cathode, causing additional loss of water. After the electrolysis reaction is carried out for a period of time, the anode of the electrolytic cell may lack water, so that the electrolysis reaction cannot be continued.

In some embodiments, as shown in fig. 2 and 3, the liquid is water, the fluid supply port 313 is in communication with the second accommodating chamber 312, the second fluid inlet 314 is disposed at the top of the second accommodating chamber 312, the second fluid inlet 314 is configured to introduce the electrolysis products of the second plate 22 and the liquid flowing back from the reaction space to the storage space to the second accommodating chamber 312, and the first fluid inlet 318 is configured to introduce the electrolysis products of the first plate 21 and the liquid flowing back from the reaction space to the storage space to the first accommodating chamber 311.

In this embodiment, the storage means supplies water to the anode of the electrolytic cell through the fluid supply port 313, introduces oxygen gas generated at the anode and water circulating back in the liquid into the second accommodation chamber 312 through the second fluid inlet 314, performs gas-liquid separation of oxygen gas and water in the second accommodation chamber 312, and introduces hydrogen gas generated at the cathode and water permeating from the anode to the cathode into the first accommodation chamber 311 through the first fluid inlet 318, and performs gas-liquid separation of hydrogen gas and water in the first accommodation chamber 311. Since the first receiving chamber and the second receiving chamber form a communicating vessel structure, water permeating from the anode to the cathode can be reused for the electrolysis reaction, reducing the additional loss of liquid, and the electrolysis reaction in the electrochemical device 2 can be continued for a long time without replenishing the liquid into the storage space.

In some embodiments, as shown in fig. 4, the electrochemical reaction apparatus further includes a motor 62 and a motor control module 72. The motor 62 is in driving connection with the fluid driving device 61 and is configured to provide the fluid driving device 61 with the power required for delivering the liquid. The motor control module 72 is in signal communication with the motor 62 and is configured to send control signals to the motor 62 that regulate the rotational direction and speed of the motor 62. The motor control module 72 can adjust the delivery rate of the liquid by adjusting the rotational speed of the motor 62.

In some embodiments, as shown in fig. 2 and 3, the first fluid inlet 318 is disposed at an upper portion of the first receiving chamber 311, and the second fluid inlet 314 is disposed at a top portion of the second receiving chamber 312.

In order to smoothly introduce the gaseous electrolysis product into the storage space, the first fluid inlet and the second fluid inlet need to be disposed at positions higher than the liquid level of the liquid. In this embodiment, through set up first fluid entry in the upper portion of first holding the chamber and set up second fluid entry in the top of second holding the chamber, can reserve the space of bigger holding liquid for first holding chamber and second holding the chamber, do benefit to the time of extension storage portion operation, reduce the frequency of replenishing liquid in to the storage space.

For an electrochemical reaction apparatus including a plurality of electrochemical devices 2, in order to introduce electrolysis products of the plurality of electrochemical devices 2, respectively, and to supply a liquid required for an electrolysis reaction to the plurality of electrochemical devices 2, the storage means 3 may include a plurality of storage portions, accordingly.

In some embodiments, the storage device 3 includes a plurality of storage portions, the first receiving cavity 311 and the second receiving cavity 312 of each storage portion are arranged side by side along the first direction X, and the storage portions are arranged side by side along the first direction X.

Accordingly, fluid inlets or fluid outlets serving the same function in the plurality of reservoirs may be arranged on the same side of the reservoir in the first direction and connected to the fluid line. For example, in the embodiment shown in fig. 2 and 3, the first receiving cavities 311 and the second receiving cavities 312 of the plurality of storage parts may be arranged at intervals in the first direction X. The plurality of first fluid inlets 318 are disposed at the front side of each storage portion in the first direction X, and the plurality of second fluid inlets 314 and the plurality of fluid supply ports 313 are disposed at the upper side of each storage portion in the first direction X.

In this embodiment, the first arrangement that holds the chamber and the second arrangement that holds the chamber and each arrangement that stores the portion of every storage portion make a plurality of storage portions have higher integrated level in the space, help saving experimental place to can make and form succinct normal structural layout with the fluid pipeline that the storage space of a plurality of storage portions corresponds the connection, do benefit to the efficiency that promotes operating personnel installation or dismantle fluid pipeline.

In some embodiments, the storage device 3 includes a storage device body 31 and a top cover 37, the first receiving cavity 311 and the second receiving cavity 312 of each storage portion are disposed in the storage device body 31, the top cover 37 is disposed at the top end of the storage device body 31, and the top cover 37 is shared by a plurality of storage portions. After the test, the top cover 37 is removed from the storage device body 31, and the storage space of each storage part can be cleaned. The material of the storage device body and the top cover may be a material that does not easily introduce impurities into the liquid in the storage space, such as resin.

In this embodiment, the storage spaces of the storage portions are integrated on the storage device body 31, and the storage portions share the top cover 37, so that the efficiency of disassembling, assembling and cleaning the storage device is improved.

In some embodiments, as shown in fig. 2 and 3, the storage device further includes a first exhaust device 32 and a second exhaust device 33. The first exhaust device 32 is connected to the first receiving chamber 311, and configured to exhaust the gaseous electrolysis products of the first electrode plate 21 stored in the first receiving chamber 311. The second exhaust device 33 is connected to the second receiving chamber 312, and is configured to exhaust the gaseous electrolysis products of the second electrode plate 22 stored in the second receiving chamber 312.

Depending on the different gaseous electrolysis products, the first and second gas discharge means 32, 33 may be connected to a gas collection means for collecting the gaseous electrolysis products, or may be directly connected to the external environment for directly discharging the gaseous electrolysis products to the external environment, if the direct discharge of the gaseous electrolysis products may pose a safety risk, the first and second gas discharge means 32, 33 may also be connected to a gas treatment means, for example, in the embodiment shown in fig. 2 and 3, the first gas discharge means 32 may be connected to a microreactor catalyzed with Pt or Pd for reducing the safety risk posed by hydrogen in an electrolysis water test.

In some embodiments, the first exhaust device 32 includes a first exhaust pipe having one end connected to the top end of the first accommodating chamber 311 and a first cooling device disposed on the first exhaust pipe, the first cooling device being configured to cool the fluid in the first exhaust pipe, and the second exhaust device 33 includes a second exhaust pipe having one end connected to the top end of the second accommodating chamber 312 and a second cooling device disposed on the second exhaust pipe, the second cooling device being configured to cool the fluid in the second exhaust pipe. For example, in the embodiment shown in fig. 2 and 3, one end of the first exhaust pipe may be connected to the first fluid outlet 315 on the top surface of the first receiving chamber 311, and one end of the second exhaust pipe may be connected to the second fluid outlet 316 on the top surface of the second receiving chamber 312.

In this embodiment, first blast pipe is connected in the first top that holds the chamber, and the second blast pipe is connected in the second top that holds the chamber, does benefit to smoothly discharging storage device with gaseous electrolysis product outside. The fluid to be cooled may be the electrolysis products in gaseous form or may be a vapour of a liquid. The first cooling device can cool the fluid flowing through the first exhaust pipe, the second cooling device can cool the fluid flowing through the second exhaust pipe, and the condensed liquid can flow back to the storage space along the first exhaust pipe and the second exhaust pipe. The material of the first exhaust pipe and the second exhaust pipe may be a material that is not likely to introduce impurities into the liquid in the storage space, such as a titanium alloy.

In some embodiments, as shown in fig. 1 and 2, the storage device 3 further comprises a sampling device 34, the sampling device 34 being in communication with at least one of the first receiving cavity 311 and the second receiving cavity 312 and configured to discharge the liquid in the storage space to obtain a test sample of the liquid.

The sampling device 34 can be used to obtain a liquid test sample at any time during the operation of the electrochemical reaction apparatus, so as to monitor and analyze the liquid, and also to discharge the residual liquid when the storage space needs to be cleaned.

In some embodiments, to further facilitate sampling and draining, the sampling device 34 includes a sampling tube connected to the bottom end of the first accommodating cavity 311 and a sampling valve disposed on the sampling tube, and the sampling valve is configured to control the on-off of the sampling tube. For example, in the embodiment shown in fig. 2 and 3, one end of the sampling tube may be connected to the third fluid outlet 317 on the bottom surface of the first receiving chamber 311.

In some embodiments, as shown in fig. 3, the storage device 3 further comprises a liquid level control device disposed on the storage portion, the storage portion further has a third fluid inlet 319 communicated with at least one of the first receiving cavity 311 and the second receiving cavity 312, the liquid level control device is configured to detect a liquid level of the liquid in the storage space, and supplement the liquid into the storage space through the third fluid inlet 319 when the liquid level of the liquid in the storage space is lower than a preset liquid level.

The preset liquid level can be determined according to the position of the communication port 310, so that the first accommodating cavity and the second accommodating cavity can form liquid seals all the time to prevent gaseous electrolysis products of different electrodes from mixing, and continuous and stable operation of the storage device and the electrochemical reaction equipment is facilitated.

In order to facilitate the experimenter to observe the change condition of the liquid level in the storage space in the test process, the storage device body 31 can also be partially or completely transparent, and the corresponding position on the rack 1 is provided with the observation port 11.

In some embodiments, as shown in fig. 4, the electrochemical reaction apparatus further includes a temperature detection device 51, a heating device 52, and a temperature control module 71. The temperature detection device 51 is configured to detect the temperature of the liquid within the storage space. The heating device 52 is configured to heat the liquid within the storage space. The temperature control module 71 is in signal connection with the temperature detection device 51 and the heating device 52, and is configured to send a control signal for heating the liquid to the heating device 52 when the temperature of the liquid in the storage space is lower than a preset temperature until the liquid reaches the preset temperature.

In this embodiment, the temperature detection device and the heating device may be disposed at the bottom of the first accommodating cavity or the bottom of the second accommodating cavity, so that the temperature detection device and the heating device can still work normally in a state of less liquid in the storage space.

When the storage device 3 includes a plurality of storage portions, the preset temperatures of the liquids in the respective storage portions may be set to different values so as to investigate the influence of the different temperatures of the liquids on the electrolytic reaction.

For the PEM electrolyzed water test, the reaction temperature in the electrolytic cell is generally in the range of 20 ℃ to 100 ℃, and the temperature detection device 51 can adopt a Pt100 temperature sensor with higher sensitivity in the temperature range to improve the control accuracy.

In some embodiments, as shown in fig. 3, the storage part further has a first connecting structure 35 and a second connecting structure 36, the first connecting structure 35 is configured to mount the temperature detecting device 51 on the storage part, the second connecting structure 36 is configured to mount the heating device 52 on the storage part, the second connecting structure 36 is disposed at the bottom of the storage space, and the first connecting structure 35 is disposed above the second connecting structure 36.

In this embodiment, the heating device 52 is installed at the bottom of the storage space and below the temperature detecting device 51. Since the hot and cold liquid will generate convection in the heating process, the above structure is beneficial for the heating device 52 to heat the liquid in the storage space sufficiently and uniformly, and the detection result of the temperature detection device 51 is also beneficial for reflecting the overall temperature of the liquid in the storage space, thereby improving the accuracy of temperature detection.

In some embodiments, the temperature control module and the motor driving module described above can be implemented as a general purpose Processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic device, discrete Gate or transistor Logic, discrete hardware components, or any suitable combination thereof for performing the functions described in this disclosure.

In some embodiments, as shown in fig. 1, the electrochemical reaction apparatus includes a plurality of electrochemical devices 2 arranged at intervals on a frame 1, and the storage device 3 includes a plurality of storage portions, and storage spaces of the plurality of storage portions are in one-to-one correspondence with reaction spaces of the plurality of electrochemical devices 2.

For example, in the embodiment shown in fig. 1, the electrochemical reaction apparatus includes four electrochemical devices 2, and the four electrochemical devices 2 are arranged in a square shape on the housing 1. Accordingly, the storage device 3 includes four storage portions, the first accommodation cavity 311 and the second accommodation cavity 312 of each storage portion are arranged side by side along the first direction X, and the four storage portions are arranged side by side along the first direction X. In some embodiments, not shown, the electrochemical reaction apparatus may further comprise more or less electrochemical devices 2, for example six, eight, twelve electrochemical devices 2.

As shown in fig. 4, when the storage device 3 includes a plurality of storage parts, in order to realize the control of the temperature of the liquid in the plurality of storage parts, the electrochemical reaction apparatus may include a plurality of temperature detection devices 51, a plurality of heating devices 52, and a plurality of temperature control modules 71; in order to achieve control of the transfer rate of the liquid in the plurality of reservoirs, the electrochemical reaction apparatus may include a plurality of fluid-driving devices 61, a plurality of motors 62, and a plurality of motor control modules 72.

The temperature control module 71 and the motor control module 72 may be provided independently of each other; as shown in fig. 4, the temperature control module 71 and the motor control module 72 may also be integrated on the same control device 7. In order to meet the requirement of processing and storing a large amount of data of the plurality of temperature control modules 71 and the plurality of motor control modules 72, the control device 7 may employ a 32-bit ARM processor and a 64MB SRAM (Static Random-Access Memory).

In some embodiments, the electrochemical reaction apparatus further comprises a power source and an internal resistance test device 4. The power supply includes a plurality of power supply units provided in one-to-one correspondence with the plurality of electrochemical devices 2, and the power supply units are electrically connected to the first and

second electrode plates

21 and 22. The internal resistance testing device 4 includes a plurality of internal resistance testing units provided in one-to-one correspondence with the plurality of electrochemical devices 2, the internal resistance testing units being configured to detect the internal resistance of the electrochemical devices 2 during the electrochemical reaction.

In this embodiment, the power supply may adopt a multi-channel dc power supply, each channel of the multi-channel dc power supply serves as a power supply unit, the internal resistance testing device 4 may adopt a multi-channel internal resistance tester, and each channel of the multi-channel internal resistance tester serves as an internal resistance testing unit. The arrangement is favorable for making the electrochemical reaction equipment compact in volume and convenient to use.

In some embodiments, the electrochemical device 2 further comprises a fixation portion 23 and a plurality of first connectors 24. The plurality of first connectors 24 are connected to the fixing portion 23. The plurality of first connectors 24 are configured to fixedly mount the first and

second electrode plates

21 and 22 on the fixing portion 23 such that the first and

second reaction chambers

211 and 221 form a reaction space.

In this embodiment, the electrochemical device adopts the connected mode that fixed part and a plurality of first connecting piece are connected to replace the connected mode that a plurality of connecting pieces are connected with a plurality of corresponding cooperation parts one by one respectively, a plurality of first connecting pieces only need be connected with the fixed part just can make first reaction chamber and second reaction chamber form electrochemical reaction's reaction space, in the in-process of being connected first connecting piece and fixed part, the fixed part can play the constraint effect to first polar plate and second polar plate in the assembly direction, first polar plate, be difficult for producing the dislocation between second polar plate and the fixed part, operating personnel need not exert the constraint simultaneously from the both sides of assembly direction, thereby do benefit to the packaging efficiency who improves electrochemical device. And under the constraint action of the fixing part, the electrochemical devices assembled by testers with different operation experiences have smaller structural differences, so that the assembly consistency of the electrochemical devices is improved, the influence of independent variables on the test is reduced, and the repeatability of the test result is improved.

In some embodiments, the electrochemical device 2 further comprises a mounting seat on which the fixation portion 23 is mounted, the mounting seat being provided with at least one first fluid port in communication with the reaction space, the at least one first fluid port being configured to introduce or lead fluid into or out of the reaction space.

The mounting seat may be a separate component, such as the deflector seat 25 shown in fig. 5, 6 and 9. The deflector seat 25 may be connected to the frame 1 by a third connection 27. The mounting base may also be integrally formed with the frame 1 as part of the frame 1 shown in fig. 1.

The fluid introduced into or led out of the reaction space through the first fluid port can be liquid, gas or a gas-liquid mixture; the fluid introduced into or discharged from the reaction space through the first fluid port may be a liquid in the galvanic cell or the electrolytic cell, a reactant of an electrode reaction occurring on one of the electrodes, a product of an electrode reaction occurring on one of the electrodes, a mixture of a reactant of an electrode reaction occurring on one of the electrodes and a liquid, or a mixture of a product of an electrode reaction occurring on one of the electrodes and a liquid.

That is, the first fluid port provided in the mounting seat may be used to introduce or discharge a liquid into or from the reaction space, or may be used to introduce a reactant or a product of an electrochemical reaction into the reaction space. The number of first fluid ports and the flow direction of the fluid of each first fluid port may be set according to the electrochemical reaction occurring in the electrochemical device.

In this embodiment, be provided with first fluid port on the mount pad, through installing the fixed part on the mount pad, just can form the fluid passage with reaction space intercommunication, especially under the condition that electrochemical reaction equipment includes a plurality of electrochemical devices, can reduce the external fluid pipeline of electrochemical device, make the fluid pipeline have more succinct arrangement, do benefit to the dismouting efficiency that promotes electrochemical device and electrochemical reaction equipment, also do benefit to and make electrochemical device and fluid pipeline have higher integrated level in the space, thereby save the test site.

In some embodiments, the fixing portion 23 is provided with a first limit structure, the mounting seat is provided with a second limit structure, and the fixing portion 23 is mounted on the mounting seat through the first limit structure and the second limit structure, so as to limit the position of the reaction space relative to the at least one first fluid port by limiting the position of the fixing portion 23 relative to the mounting seat.

In some embodiments, the first and second limiting structures are male and female mating structures. For example, one of the first and second retention structures may include a groove and the other may include a boss.

In some embodiments, as shown in fig. 5, 6 and 9, a plurality of first connectors 24 are connected to the fixing portion 23 through the first and

second electrode plates

21 and 22 in sequence. The first limit structure includes a groove 231 penetrating the fixing portion 23, and the second limit structure includes a boss, such as a boss 251, disposed on the diversion seat 25 and engaged with the groove 231. At least one first fluid port is arranged on the end face of the boss, at least one second fluid port which is correspondingly connected with the at least one first fluid port in a one-to-one mode is arranged on the end face of one side, close to the mounting seat, of the second polar plate 22, and the at least one second fluid port is communicated with the reaction space.

In this embodiment, the groove 231 is a through groove penetrating through the fixing portion 23 to form a space avoiding the boss, and after the fixing portion is mounted on the mounting seat, the first fluid port disposed on the end surface of the boss and the second fluid port disposed on the end surface of the second polar plate 22 on the side close to the mounting seat can form a connection relationship to form a fluid channel communicated with the reaction space, so that the electrochemical device has higher assembly and disassembly efficiency.

In some embodiments, each first fluid port is in contact with a corresponding second fluid port, and the electrochemical device further comprises a sealing member disposed between each first fluid port and the corresponding second fluid port.

In this embodiment, when the fixing portion 23 is mounted on the mounting seat through the first limiting structure and the second limiting structure, the first fluid port and the corresponding second fluid port may be tightly attached through a sealing member, which is beneficial to reducing the leakage of the fluid during the use process, thereby optimizing the performance of the electrochemical device.

In some embodiments, not shown, a quick connector or the like may be used to connect between each first fluid port and the corresponding second fluid port.

In some embodiments, as shown in fig. 5, 6 and 9, the first connection member 24 comprises a threaded connection member, and the fixing portion 23 is provided with a plurality of first threaded connection holes 232 corresponding to the plurality of first connection members 24; the first limiting structure includes a groove 231 penetrating through the fixing portion 23, and the second limiting structure includes a boss matched with the groove 231, for example, a boss 251 disposed on the flow guide seat 25. Recess 231 is the rectangle through groove, and the boss is the cuboid structure, and a plurality of first threaded connection holes 232 distribute in the width direction's of recess 231 both sides in order to dodge recess 231.

In this embodiment, when the first connecting member 24 is a threaded connecting member, the first pole plate, the second pole plate and the fixing portion may have a tendency to rotate relatively during the assembling or disassembling process. The rectangular groove 231 penetrating through the fixing part 23 and the boss 251 in a cuboid structure are arranged, so that the trend of relative rotation of the first polar plate, the second polar plate and the fixing part can be inhibited by limiting the rotation of the fixing part relative to the mounting seat, and the assembly and disassembly efficiency of the electrochemical device is further improved. The rectangular groove 231 penetrating through the fixing portion 23 and the boss 251 having a rectangular parallelepiped structure are also beneficial to uniformly and reasonably arranging the plurality of first threaded connecting holes 232 in the remaining space of the fixing portion 23.

In some embodiments, as shown in fig. 7 and 8, the first plate 21 is provided with a plurality of first through holes 215 corresponding to the plurality of first threaded connection holes 232 for penetrating the first connection member 24, the first reaction chamber 211 forms a square distribution region, the first through holes 215 are disposed around the distribution region of the first reaction chamber 211 and form a square distribution region to avoid the first reaction chamber 211, and the distribution region of the first reaction chamber 211 and the distribution region of the first through holes 215 are disposed at an angle; the second plate 22 is provided with a plurality of second through holes 226 corresponding to the plurality of first threaded connection holes 232 and used for penetrating the first connection member 24, the second reaction chamber 221 forms a square distribution area, the second through holes 226 are arranged around the distribution area of the second reaction chamber 221 and form a square distribution area to avoid the second reaction chamber 221, and the distribution area of the second reaction chamber 221 and the distribution area of the second through holes 226 form an included angle.

In this embodiment, the first reaction chamber 211 and the second reaction chamber 221 may be configured as a winding flow channel closely arranged, so as to improve the test efficiency by increasing the contact area of the reactants. Under the premise that the distribution areas of the first reaction chamber and the second reaction chamber are fixed, the distribution area of the first reaction chamber 211 and the distribution area of the first through hole 215 are arranged in an included angle mode, and the distribution area of the second reaction chamber 221 and the distribution area of the second through hole 226 are arranged in an included angle mode, so that the first polar plate and the second polar plate can have smaller sizes, and the integration of a plurality of electrochemical devices 2 on one electrochemical reaction device is facilitated. The included angle may be in the range 30 to 60, for example 45. The first through holes 215 are disposed around the distribution area of the first reaction chamber 211, and the second through holes 226 are disposed around the distribution area of the second reaction chamber 221, which also facilitates the rational utilization of the remaining space on the plate.

In some embodiments, the electrochemical device 2 further includes an electrolyte membrane installed between the first reaction chamber 211 and the second reaction chamber 221.

In some embodiments, the electrolyte membrane is a proton exchange membrane when used as a reactor in a PEM electrolyzed water test. The storage part also has a fluid supply port 313, and the fluid supply port 313 is configured to supply water to the reaction space. The first fluid port comprises a first inlet port connected to the second fluid inlet 314 and a first outlet port connected to the fluid supply port 313, and the second fluid port comprises a second inlet port in communication with the second reaction chamber 221 and configured to introduce water into the second reaction chamber 221 and a second outlet port in communication with the first inlet port and configured to direct water and oxygen out of the second reaction chamber 221. The first plate 21 is provided with a third fluid port 212 communicating with the first reaction chamber 211, and the third fluid port 212 is configured to guide the hydrogen gas out of the first reaction chamber 211.

In this embodiment, for an electrochemical device having an electrolyte membrane such as a proton exchange membrane, by adopting the connection manner in which the fixing portion is connected to the plurality of first connection members, the first polar plate, the proton exchange membrane, and the second polar plate are not easily dislocated during the assembly process, which is beneficial to further improving the assembly efficiency of the electrochemical device. And, under the constraint effect of fixed part, the part is more in the electrochemical device, is favorable to reducing the difference that different operation experience's experimenter assembled electrochemical device is structural more and promotes the assembly uniformity of electrochemical device to promote the repeatability of test result.

In some embodiments, as shown in fig. 5 and 6, the electrochemical device 2 further comprises a flow conduit 26, a first end of the flow conduit 26 being coupled to the third fluid port 212, and a second end of the flow conduit 26 being coupled to the first fluid inlet 318.

The other end of the flow tube 26 may be connected to a storage device for the product or the like when the electrochemical device is assembled. For example, when the electrochemical device is used as a reactor for PEM water electrolysis tests, the other end of the flow conduit 26 can be connected to a hydrogen gas collection device.

As shown in fig. 5 to 9, when the electrochemical device is used as a reactor for PEM electrolytic water test, the second plate 22 corresponds to an anode of an electrolytic cell, the second plate 22 is provided with a second protrusion 224 and a second connection hole 225 for connecting with a power supply, during electrolysis, water is a reactant of an anode reaction, oxygen and protons are a product of the anode reaction, water in the storage device 3 is used as an electrolyte and a cooling medium, and is introduced into the second reaction chamber 221 from the second accommodating chamber 312 through the fluid supply port 313, the first liquid outlet 252, the second liquid inlet and the first flow channel 222 on the fluid guide seat 25, and oxygen generated by the anode is introduced into the second accommodating chamber 312 from the second flow channel 223 through the second liquid outlet, the first liquid inlet 253 and the second fluid inlet 314 on the fluid guide seat 25; the first plate 21 corresponds to the cathode of the electrolytic cell, the second plate 22 is provided with a first protrusion 213 and a first connection hole 214 for connecting with a power supply, during electrolysis, protons enter the first reaction chamber 211 through the proton exchange membrane, hydrogen is a product of the cathode reaction, and hydrogen is introduced into the first accommodation chamber 311 through the third fluid port 212, the flow guide pipe 26 and the first fluid inlet 318. Since a small amount of water leaks to the first reaction chamber 211 through the proton exchange membrane during the electrolysis, the small amount of water leaking to the first reaction chamber 211 is also introduced into the first accommodating chamber 311 through the third fluid port 212, the flow guide tube 26 and the first fluid inlet 318.

In order to make the mounting relationship between the fixing portion and the mounting seat more secure and reliable, in some embodiments, the electrochemical device 2 further comprises a second connecting member configured to fixedly mount the fixing portion 23 on the mounting seat.

The second connector may be a threaded connector, for example, in the embodiment shown in fig. 6 and 9, the threaded connector is inserted into the third through hole 254 of the guide seat 25 and connected with the second threaded connection hole 233 of the fixing portion 23 to fixedly mount the fixing portion 23 on the guide seat 25. In some embodiments, which are not shown in the drawings, the second connector may also be a magnetic connector respectively disposed on the fixing portion and the mounting seat.

Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent replacements of parts of the technical features may be made, which are all covered by the technical solution claimed by the disclosure.

Claims

1. An electrochemical reaction apparatus, comprising:

a frame (1);

the electrochemical device (2) is mounted on the frame (1), the electrochemical device (2) comprises a first polar plate (21) and a second polar plate (22) with the polarity opposite to that of the first polar plate (21), the first polar plate (21) is provided with a first reaction cavity (211), the second polar plate (22) is provided with a second reaction cavity (221), and the first reaction cavity (211) and the second reaction cavity (221) form a reaction space of an electrochemical reaction; and

a storage device (3) mounted on the frame (1), the storage device (3) including a storage portion, the reservoir having a first receiving chamber (311), a second receiving chamber (312), a first fluid inlet (318) and a second fluid inlet (314), the first containing cavity (311) and the second containing cavity (312) form a communicating vessel structure and form a storage space for storing liquid required by electrolytic reaction, the first fluid inlet (318) is communicated with the first reaction cavity (211) and the first containing cavity (311) and is configured to introduce the electrolysis products of the first polar plate (21) into the first containing cavity (311), the second fluid inlet (314) is communicated with the second reaction chamber (221) and the second containing chamber (312) and is configured to introduce the electrolysis products of the second plate (22) into the second containing chamber (312).

2. The electrochemical reaction apparatus according to claim 1, wherein the storage part includes a partition wall (S), the first accommodation chamber (311) and the second accommodation chamber (312) are partitioned by the partition wall (S), and a communication port (310) is provided at a bottom of the partition wall (S) to communicate the first accommodation chamber (311) and the second accommodation chamber (312).

3. The electrochemical reaction apparatus according to claim 2, wherein the first receiving chamber (311) and the second receiving chamber (312) are arranged side by side along a first direction (X) and the first receiving chamber (311) and the second receiving chamber (312) extend along a second direction (Z) perpendicular to the first direction, a dimension of the first receiving chamber (311) in the second direction (Z) is larger than a dimension of the first receiving chamber (311) in the first direction (X), and a dimension of the second receiving chamber (312) in the second direction (Z) is larger than a dimension of the second receiving chamber (312) in the first direction (X).

4. The electrochemical reaction apparatus according to claim 1,

the reservoir further having a fluid supply port (313), the fluid supply port (313) being configured to supply the liquid to the reaction space;

the electrochemical reaction apparatus further includes a fluid driving device (61), the fluid driving device (61) being configured to deliver the liquid stored in the storage space to the reaction space through the fluid supply port (313).

5. The electrochemical reaction apparatus according to claim 4, wherein the liquid is water, the fluid supply port (313) is in communication with the second receiving chamber (312), the second fluid inlet (314) is provided at a top of the second receiving chamber (312), the second fluid inlet (314) is configured to introduce an electrolysis product of the second electrode plate (22) and the liquid flowing back from the reaction space to the storage space to the second receiving chamber (312), and the first fluid inlet (318) is configured to introduce an electrolysis product of the first electrode plate (21) and the liquid flowing back from the reaction space to the storage space to the first receiving chamber (311).

6. The electrochemical reaction apparatus as claimed in claim 4, further comprising:

a motor (62) in driving connection with the fluid driving device (61) and configured to provide the fluid driving device (61) with power required for conveying the liquid; and

a motor control module (72) in signal connection with the motor (62) configured to send control signals to the motor (62) that adjust the rotational direction and speed of the motor (62).

7. The electrochemical reaction apparatus of claim 1, wherein the first fluid inlet (318) is provided at an upper portion of the first receiving chamber (311), and the second fluid inlet (314) is provided at a top portion of the second receiving chamber (312).

8. The electrochemical reaction apparatus according to claim 1, wherein the storage device (3) includes a plurality of the storage portions, the first receiving chamber (311) and the second receiving chamber (312) of each of the storage portions are arranged side by side along a first direction (X), and the storage portions are arranged side by side along the first direction (X).

9. The electrochemical reaction apparatus according to claim 8, wherein the storage device (3) includes a storage device body (31) and a top cover (37), the first receiving chamber (311) and the second receiving chamber (312) of each of the storage portions are disposed in the storage device body (31), the top cover (37) is disposed at a top end of the storage device body (31), and the top cover (37) is shared by a plurality of the storage portions.

10. The electrochemical reaction apparatus according to any one of claims 1 to 9, wherein the storage device (3) further comprises:

a first exhaust device (32) connected to the first accommodating chamber (311) and configured to exhaust the gaseous electrolysis products of the first electrode plate (21) stored in the first accommodating chamber (311); and

a second exhaust device (33) connected to the second accommodating chamber (312) and configured to exhaust the gaseous electrolysis products of the second electrode plate (22) stored in the second accommodating chamber (312).

11. The electrochemical reaction apparatus according to claim 10, wherein the first exhaust device (32) includes a first exhaust pipe having one end connected to a top end of the first receiving chamber (311) and a first cooling device provided on the first exhaust pipe, the first cooling device being configured to cool the fluid in the first exhaust pipe, and the second exhaust device (33) includes a second exhaust pipe having one end connected to a top end of the second receiving chamber (312) and a second cooling device provided on the second exhaust pipe, the second cooling device being configured to cool the fluid in the second exhaust pipe.

12. The electrochemical reaction apparatus according to any one of claims 1 to 9, wherein the storage device (3) further comprises a sampling device (34), the sampling device (34) being in communication with at least one of the first receiving chamber (311) and the second receiving chamber (312) and being configured to drain the liquid within the storage space to obtain a test sample of the liquid.

13. The electrochemical reaction apparatus according to claim 12, wherein the sampling device (34) comprises a sampling tube connected to a bottom end of the first receiving chamber (311) and a sampling valve provided on the sampling tube, the sampling valve being configured to control on/off of the sampling tube.

14. The electrochemical reaction apparatus according to any one of claims 1 to 9, wherein the storage device (3) further comprises a liquid level control device provided on the storage part, the storage part further having a third fluid inlet (319) communicating with at least one of the first receiving chamber (311) and the second receiving chamber (312), the liquid level control device being configured to detect a liquid level of the liquid in the storage space, and to replenish the liquid in the storage space through the third fluid inlet (319) when the liquid level of the liquid in the storage space is lower than a preset liquid level.

15. The electrochemical reaction apparatus according to any one of claims 1 to 9, further comprising:

a temperature detection device (51) configured to detect a temperature of the liquid within the storage space;

a heating device (52) configured to heat the liquid within the storage space; and

a temperature control module (71) in signal connection with the temperature detection device (51) and the heating device (52), configured to send a control signal to the heating device (52) to heat the liquid when the temperature of the liquid in the storage space is lower than a preset temperature until the liquid reaches the preset temperature.

16. The electrochemical reaction apparatus according to claim 15, wherein the storage part further has a first connection structure (35) and a second connection structure (36), the first connection structure (35) is configured to mount the temperature detection device (51) on the storage part, the second connection structure (36) is configured to mount the heating device (52) on the storage part, the second connection structure (36) is disposed at a bottom of the storage space, and the first connection structure (35) is disposed above the second connection structure (36).

17. The electrochemical reaction apparatus according to claim 1, comprising a plurality of the electrochemical devices (2) arranged at intervals on the housing (1), wherein the storage device (3) comprises a plurality of the storage portions, and the storage spaces of the plurality of the storage portions are in one-to-one correspondence with the reaction spaces of the plurality of the electrochemical devices (2).

18. The electrochemical reaction apparatus as claimed in claim 17, further comprising:

a power supply comprising a plurality of power supply units arranged in one-to-one correspondence with a plurality of said electrochemical devices (2), said power supply units being electrically connected to said first plate (21) and said second plate (22); and

an internal resistance testing device (4) comprising a plurality of internal resistance testing units arranged in one-to-one correspondence with the plurality of electrochemical devices (2), the internal resistance testing units being configured to detect the internal resistance of the electrochemical devices (2) during an electrochemical reaction.

19. Electrochemical reaction device according to claim 1, characterized in that said electrochemical device (2) further comprises:

a fixed part (23); and

a plurality of first connectors (24) connected to the fixing part (23), the plurality of first connectors (24) being configured to fixedly mount the first electrode plate (21) and the second electrode plate (22) on the fixing part (23) such that the first reaction chamber (211) and the second reaction chamber (221) form the reaction space.

20. Electrochemical reaction apparatus according to claim 19, characterized in that the electrochemical device (2) further comprises a mounting seat on which the fixing portion (23) is mounted, the mounting seat being provided with at least one first fluid port communicating with the reaction space, the at least one first fluid port being configured to introduce or lead fluid into or out of the reaction space.

21. Electrochemical reaction device according to claim 20, characterized in that the fixation part (23) is provided with a first stop structure and the mounting seat is provided with a second stop structure, the fixation part (23) being mounted on the mounting seat by means of the first and second stop structures to limit the position of the reaction space relative to the at least one first fluid port by limiting the position of the fixation part (23) relative to the mounting seat.

22. The electrochemical reaction apparatus of claim 21, wherein the first and second retention structures are male and female mating structures.

23. The electrochemical reaction apparatus according to claim 22,

the first connecting pieces (24) penetrate through the first pole plate (21) and the second pole plate (22) in sequence and are connected with the fixing part (23);

the first limiting structure comprises a groove (231) penetrating through the fixing part (23), the second limiting structure comprises a boss matched with the groove (231), the at least one first fluid port is formed in the end face of the boss, at least one second fluid port connected with the at least one first fluid port in a one-to-one correspondence mode is formed in the end face of one side, close to the mounting seat, of the second pole plate (22), and the at least one second fluid port is communicated with the reaction space.

24. The electrochemical reaction apparatus of claim 23 wherein each of said first fluid ports is in contact with a corresponding said second fluid port, said electrochemical device further comprising a sealing member disposed between each of said first fluid ports and a corresponding said second fluid port.

25. The electrochemical reaction apparatus according to claim 22,

the first connecting pieces (24) comprise threaded connecting pieces, and the fixing part (23) is provided with a plurality of first threaded connecting holes (232) corresponding to the plurality of first connecting pieces (24);

first limit structure is including running through recess (231) of fixed part (23), second limit structure include with recess (231) complex boss, recess (231) are the rectangle and lead to the groove, the boss is the cuboid structure, a plurality of first threaded connection holes (232) distribute in the width direction's of recess (231) both sides are in order to dodge recess (231).

26. The electrochemical reaction apparatus according to claim 25,

the first pole plate (21) is provided with a plurality of first through holes (215) which correspond to the first threaded connecting holes (232) and are used for penetrating through the first connecting piece (24), the first reaction cavity (211) forms a square distribution area, the first through holes (215) are arranged around the distribution area of the first reaction cavity (211) and form a square distribution area so as to avoid the first reaction cavity (211), and the distribution area of the first reaction cavity (211) and the distribution area of the first through holes (215) are arranged in an included angle mode;

the second polar plate (22) be provided with a plurality of first threaded connection holes (232) correspond be used for wear to establish a plurality of second through-holes (226) of first connecting piece (24), second reaction chamber (221) form the distribution region of square, second through-hole (226) set up in just form the distribution region of square around the distribution region of second reaction chamber (221), in order to dodge second reaction chamber (221), the distribution region of second reaction chamber (221) with the distribution region of second through-hole (226) becomes the contained angle ground and sets up.

27. The electrochemical reaction apparatus according to claim 23, wherein the electrochemical device (2) further comprises an electrolyte membrane installed between the first reaction chamber (211) and the second reaction chamber (221).

28. The electrochemical reaction apparatus according to claim 27,

the electrolyte membrane is a proton exchange membrane;

the reservoir further having a fluid supply port (313), the fluid supply port (313) being configured to supply water to the reaction space;

the first fluid port comprises a first inlet port connected to the second fluid inlet (314) and a first outlet port connected to the fluid supply port (313), the second fluid port comprises a second inlet port and a second outlet port in communication with the second reaction chamber (221), the second inlet port is in communication with the first outlet port and is configured to direct water into the second reaction chamber (221), and the second outlet port is in communication with the first inlet port and is configured to direct water and oxygen out of the second reaction chamber (221);

the first plate (21) is provided with a third fluid port (212) communicating with the first reaction chamber (211), the third fluid port (212) being configured to conduct hydrogen out of the first reaction chamber (211).

29. The electrochemical reaction apparatus of claim 28, wherein the electrochemical device (2) further comprises a flow conduit (26), a first end of the flow conduit (26) being connected to the third fluid port (212), a second end of the flow conduit (26) being connected to the first fluid inlet (318).

30. The electrochemical reaction apparatus according to claim 19, wherein the electrochemical device (2) further comprises a second connecting member configured to fixedly mount the fixing portion (23) on the mount.