High-efficiency hydrogen production device and control method for alkaline solution electrolyzer based on external bias electric field

Abstract

The present invention discloses an efficient hydrogen production device and control method for an alkaline liquid electrolyzer based on an external bias electric field, the device comprising an external power supply, an alkaline liquid electrolyzer, a plurality of electrolytic plates arranged inside the alkaline liquid electrolyzer, and two external insulating plates, wherein the two external insulating plates are located at the outermost sides of the plurality of electrolytic plates, and the external insulating plates comprise insulating grooves and insulating plates arranged inside the insulating grooves; the external power supply is respectively connected to the insulating plates and the electrolytic plates to form an electromagnetic field power supply system and an electrolytic power supply system; the electrolytic hydrogen production is achieved by controlling the electromagnetic field power supply system and the electrolytic power supply system, and the reverse current is suppressed. The present invention adopts a constant electric field to promote electrolysis, and its mechanism is the reconstruction of ion aggregation in the double electric layer by the electric field; the hydrogen production efficiency of the alkaline liquid electrolyzer during startup is improved, the reverse current of the alkaline liquid electrolyzer during shutdown is reduced, the life of the alkaline liquid electrolyzer is improved, no additional energy is consumed, and the initial construction cost is also very low.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production by operation of a hydrogen-electric coupling system in the field of new energy, and in particular relates to a high-efficiency hydrogen production device and a control method for an alkaline solution electrolyzer based on an external bias electric field. Background Art

[0002] In recent years, with the continuous increase in the penetration rate of renewable energy and the shortage of flexible resources, the pressure on power system absorption has been increasing. At the same time, the high proportion of renewable energy units has also brought great impacts to the power system, such as wide-band resonance and frequency stability. How to further utilize renewable energy efficiently has also become a hot topic. Due to the characteristics of hydrogen energy such as clean, zero-carbon and sustainable, it has been considered as a new energy form with wide application potential. Therefore, the development of renewable energy electrolysis hydrogen production technology has become one of the solutions, which can effectively alleviate the related problems caused by the above-mentioned large-scale renewable energy grid connection. The converter provides power to the electrolyzer, which is also crucial for the electrolysis hydrogen production system. Traditional research on the impact of high-frequency pulse electrolysis methods on hydrogen production systems is not credible due to inconsistent definitions of efficiency (such as voltage efficiency, energy efficiency, etc.) and lack of effective mechanism explanations. In fact, from an energy perspective, high-frequency pulses will introduce larger harmonics, which will reduce system efficiency. The electrolytic hydrogen production system has the characteristics of low voltage and high current. To address this challenge, researchers have studied and designed a novel electrolytic hydrogen production converter based on an interleaved parallel structure. They have considered the design of AC / DC converters and their control technology when large-capacity electrolytic hydrogen production systems are connected to the AC power grid. They have made effective combinations using the current-carrying capacity of thyristors and the flexibility of insulated gate bipolar transistors (IGBTs), which can achieve high current regulation and harmonic suppression while ensuring economy. The above-mentioned research on electrolytic hydrogen production converters mainly focuses on improving the efficiency of the converter itself, and pays less attention to how to improve the efficiency of the electrolyzer itself. Relatively speaking, the loss of the electrolyzer itself is far greater than the loss of the converter, and its improvement effect will be more significant. In addition, converter technology is relatively mature, and the efficiency of commercial products can reach more than 98%, so its room for improvement is also relatively limited.

[0003] In the process of water electrolysis, electric field enhancement is also a means of promoting hydrogen evolution reaction (HER). The use of electric field will make the catalyst have better hydrogen evolution reaction activity. The electric field enhancement strategy is to add an electric field perpendicular to the catalyst on the basis of the original experimental device. The vertical electric field effectively adjusts the Schottky barrier type and barrier height, which is helpful for the carrier transport of the catalyst and promotes the electrons to reach the activation center. At the same time, as a very promising strategy, the electric field effect can also reduce the contact resistance and the sheet resistance of the catalyst, increase the channel conductivity of the catalyst, and obtain a faster electron transfer rate, that is, improve the catalytic performance of the catalyst under lower channel resistance and faster charge transfer. However, on the one hand, the current research on the application of electric field in water electrolysis for hydrogen production is only in the laboratory research, and there is no clear solution for specific engineering implementation; on the other hand, the research on the electric field embedded in the industrial alkali electrolyzer does not consider the problems of reverse current and insulation. At present, the academic community's research on improving electrolysis efficiency by electric fields may have insulation risks in industrial hydrogen production. Once the insulation structure is damaged, the electrolyzer will be damaged, and further explosions may occur. This has an adverse impact on the industrial application of electric fields. Summary of the invention

[0004] The purpose of the present invention is to provide an efficient hydrogen production device and control method for an alkaline solution electrolyzer based on an external bias electric field in view of the deficiencies of the prior art. The present invention solves the problem that the traditional alternating magnetic field is difficult to apply to the electrolysis of hydrogen in industrial electrolyzers, making it possible to apply electromagnetic fields in industrial electrolyzers at low cost and high efficiency.

[0005] The object of the present invention is achieved through the following technical solutions: In a first aspect, an embodiment of the present invention provides an efficient hydrogen production device for an alkaline solution electrolyzer based on an external bias electric field, comprising:

[0006] an alkali solution electrolytic cell, the interior of which is filled with alkali solution;

[0007] A plurality of electrolytic plates are arranged inside the alkaline solution electrolytic cell;

[0008] Two external insulating plates are arranged inside the alkaline solution electrolytic cell and are located at the outermost sides of the plurality of electrolytic plates, wherein the external insulating plates include insulating grooves and insulating plates arranged inside the insulating grooves; and

[0009] An external power source is connected to the insulating plate and the electrolytic plate respectively, the external power source is connected to the insulating plate to form an electric field power supply system, and the external power source is connected to the electrolytic plate to form an electrolytic power supply system;

[0010] Among them, the electric field power supply system is used to supply power to two external insulating plates to generate an external electric field; the electrolysis power supply system is used to supply power to an electrolytic cell stack composed of multiple electrolysis plates to achieve hydrogen production by electrolysis.

[0011] Furthermore, the insulating groove, the insulating electrode plate and the electrolytic electrode plate are parallel to each other.

[0012] Furthermore, the electric field power supply system includes two operating modes, namely a start-up mode and a disconnection mode; in the start-up mode, the double-layer electric field distribution is changed by an external electric field on the insulating plate to change ion aggregation and promote electrolysis to produce hydrogen; in the disconnection mode, the double-layer electric field distribution is changed by an external electric field on the insulating plate to prevent the directional movement of ions and suppress reverse current.

[0013] Furthermore, the direction of the external electric field on the insulating plate is consistent with the direction of the electrolysis voltage of the alkaline solution electrolysis cell.

[0014] Furthermore, the electric field power supply system is a Boost circuit, which is used as a boost converter to perform voltage control. The Boost circuit includes an inductor. Polarized capacitors , Fast Recovery Diode and FET , the control law of the Boost circuit is:

[0015]

[0016] in, Indicates the duty cycle of the electric field power supply system; represents the PI controller of the Boost circuit, s is the Laplace operator, represents the proportional coefficient of the PI controller of the Boost circuit, Represents the integral coefficient of the PI controller of the Boost circuit; is the output voltage reference value, is the voltage value of the insulating plate;

[0017] The electrolytic power supply system is a Buck circuit, which includes an inductor Polarized capacitors , Fast Recovery Diode and FET , the control law of the Buck circuit is:

[0018]

[0019] in, Indicates the duty cycle of the electrolysis power supply system; represents the PI controller of the Buck circuit, represents the proportional coefficient of the PI controller of the Buck circuit, Represents the integral coefficient of the PI controller of the Buck circuit; is the reference value of electrolysis current, is the electrolysis current value.

[0020] Furthermore, the electric field power supply system is also provided with a hardware protection device, which is used to automatically disconnect the hardware protection device to cut off the power supply of the electric field power supply system when the current on the electric field power supply system suddenly increases to be greater than a preset safety current threshold.

[0021] Furthermore, the electric field power supply system is also provided with a software protection system, which monitors the excitation current and the excitation current change rate of the electric field power supply system through a program. When the monitored current is greater than a preset safety current threshold, the program is started to shut down and the power supply of the electric field power supply system is automatically cut off.

[0022] Furthermore, the insulating plate comprises a conductive layer, an intermediate layer and an insulating layer, wherein the intermediate layer wraps the conductive layer, the insulating layer further wraps the intermediate layer, and the conductive layer is connected to the external power source;

[0023] The material of the conductive layer is a conductive material, the material of the intermediate layer is a high dielectric constant material, and the material of the insulating layer is an insulating material.

[0024] Furthermore, the material of the conductive layer is iron, the material of the intermediate layer is strontium titanate, and the material of the insulating layer is barium titanate or alumina ceramic.

[0025] A second aspect of an embodiment of the present invention provides a control method for the above-mentioned alkaline solution electrolyzer high-efficiency hydrogen production device based on an external bias electric field, comprising:

[0026] During the electrolytic hydrogen production process of the alkaline solution hydrogen production electrolyzer, the voltage value of the insulating plate in the electric field power supply system and the electrolysis current value in the electrolysis power supply system are obtained in real time; the duty cycle of the electric field power supply system is controlled according to the output voltage reference value, and the duty cycle of the electrolysis power supply system is controlled according to the electrolysis current reference value to achieve control of the electric field power supply system and the electrolysis power supply system; by controlling the operating mode of the electric field power supply system, electrolytic hydrogen production is promoted and reverse current is suppressed.

[0027] The beneficial effects of the present invention are as follows: the present invention promotes electrolysis by reconstructing the ion aggregation in the double electric layer through a constant electric field; the present invention can ensure that the performance of the electrolyzer can be improved during both startup and shutdown of the electrolyzer, improve the hydrogen production efficiency of the electrolyzer during startup, reduce the reverse current of the electrolyzer during shutdown, and improve the life of the electrolyzer; using the device described in the present invention, the life of the alkaline solution electrolyzer can be improved, and the hydrogen production efficiency of the alkaline solution electrolyzer can be improved, and no additional energy needs to be consumed, and the initial construction cost is also very low. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a principle block diagram of the alkali liquid electrolyzer in the alkali liquid electrolyzer high-efficiency hydrogen production device based on an external bias electric field of the present invention;

[0029] Figure 2 It is a system diagram of an alkaline solution electrolyzer in an alkaline solution electrolyzer high-efficiency hydrogen production device based on an external bias electric field of the present invention;

[0030] Figure 3 The present invention is a flow chart of a control algorithm for an efficient hydrogen production device for an alkaline solution electrolyzer based on an external bias electric field. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0032] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0033] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0034] The present invention is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0035] See also Figure 1 The high-efficiency hydrogen production device of an alkaline liquid electrolyzer based on an external bias electric field of the present invention specifically includes an alkaline liquid electrolyzer, a plurality of electrolytic plates, two external insulating plates and an external power supply. The innovation of the alkaline liquid electrolyzer lies in its plates and control strategy. Among them, the interior of the alkaline liquid electrolyzer is filled with alkaline liquid; a plurality of electrolytic plates are arranged inside the alkaline liquid electrolyzer; two external insulating plates are arranged inside the alkaline liquid electrolyzer and are located at the outermost sides of the plurality of electrolytic plates, and the external insulating plates include insulating grooves and insulating plates arranged inside the insulating grooves; the external power supply is respectively connected to the insulating plates and the electrolytic plates, the external power supply is connected to the insulating plates to form an electric field power supply system, and the external power supply is connected to the electrolytic plates to form an electrolytic power supply system, such as Figure 2 As shown. The electric field power supply system is used to supply power to two external insulating plates to generate an external electric field. The electrolysis power supply system is used to supply power to an electrolyzer stack composed of multiple electrolysis plates to achieve hydrogen production by electrolysis.

[0036] It should be understood that an external power supply is used to power the insulating plates and the electrolysis plates, that is, the electric field power supply system of the two external insulating plates and the electrolysis power supply system of the electrolytic cell stack share a common external power supply, and the electric field power supply system and the electrolysis power supply system are controlled by a centralized control system.

[0037] Furthermore, the insulating grooves, insulating plates and electrolytic plates are parallel to each other. Among them, multiple electrolytic plates are responsible for electrolysis and hydrogen production, and the two insulating plates do not participate in the electrolysis reaction, and are both placed parallel to the electrolytic plates through the insulating grooves.

[0038] Furthermore, the electric field power supply system includes two operating modes, namely a start mode and a disconnect mode.

[0039] Furthermore, the direction of the applied electric field on the insulating plate is consistent with the direction of the electrolysis voltage of the alkaline solution electrolyzer, so that electrolysis and hydrogen production can be promoted in the startup mode and reverse current can be suppressed in the disconnection mode.

[0040] Furthermore, in the startup mode, the external electric field on the insulating plate can change the double-layer electric field distribution, thereby changing the ion aggregation, promoting electrolytic hydrogen production, and improving the electrolysis efficiency. In the disconnection mode, the external electric field on the insulating plate can change the double-layer electric field distribution, prevent the directional movement of ions, inhibit reverse current, and increase the life of the alkali solution electrolyzer.

[0041] Furthermore, the electric field power supply system and the electrolysis power supply system share a common external power supply and are controlled by a lumped control system, such as Figure 3As shown. The electric field power supply system is a Boost circuit, which is used as a boost converter to control the voltage. The Boost circuit can play the role of output voltage and can accurately control the output voltage. The Boost circuit includes an inductor Polarized capacitors , Fast Recovery Diode and FET , the control law of the Boost circuit is:

[0042]

[0043] in, Indicates the duty cycle of the electric field power supply system; represents the PI controller of the Boost circuit, s is the Laplace operator, represents the proportional coefficient of the PI controller of the Boost circuit, Represents the integral coefficient of the PI controller of the Boost circuit; is the output voltage reference value, is the voltage value of the insulated plate.

[0044] In the electrolytic hydrogen production base, the bus voltage is higher than the rated voltage of the alkali liquid electrolyzer, and a Buck circuit is used as a voltage conversion circuit. The electrolytic power supply system is a Buck circuit, which includes an inductor Polarized capacitors , Fast Recovery Diode and FET , the control law of the Buck circuit is:

[0045]

[0046] in, Indicates the duty cycle of the electrolysis power supply system; represents the PI controller of the Buck circuit, represents the proportional coefficient of the PI controller of the Buck circuit, Represents the integral coefficient of the PI controller of the Buck circuit; is the reference value of electrolysis current, is the electrolysis current value.

[0047] Furthermore, the electric field power supply system is also provided with hardware protection devices, such as air switches, protective fuses and other hardware protection devices, which are used to automatically disconnect the hardware protection devices when the current on the electric field power supply system suddenly increases to a value greater than a preset safety current threshold, so as to cut off the power supply of the electric field power supply system. The electric field power supply system is also provided with a software protection system, which monitors the excitation current and the excitation current change rate of the electric field power supply system through a program, and when the current is detected to be greater than a preset safety current threshold, the program is started to shut down and the power supply of the electric field power supply system is automatically cut off. Both the hardware protection device and the software protection system are used to protect the insulating plates.

[0048] Exemplarily, for the electric field power supply system of the insulated plate, hardware protection and software protection are done well. In terms of hardware protection: a protection fuse is connected in series on the output side of the electric field power supply system, that is, a protection fuse is connected in series on the output line of the Boost circuit. Since the electric field power supply system of the insulated plate does not need to output the electrolysis current during stable operation, the rated current of the protection fuse is selected according to a smaller value to achieve rapid protection action. In terms of software protection: the control system of the electric field power supply system sets a protection program, which is a protection program in the control system of the Boost circuit. Once the output current of the Boost circuit is greater than the preset allowable output current threshold, the Boost circuit stops supplying power and automatically disconnects the electric field power supply system; wherein the allowable output current threshold can select a smaller value. Double-layer protection can protect the alkaline solution electrolyzer to the greatest extent.

[0049] It should be understood that since the applied voltage on the insulating plate does not participate in the electrolysis reaction, it does not consume energy under stable operation. The voltage applied to the insulating plate is usually high voltage. Once the insulating groove is damaged, the voltage applied to the insulating plate will participate in the electrolysis reaction. If there is no external protection, it is likely to be dangerous. Therefore, the electric field power supply system will be provided with a hardware protection device and a software protection system. Once the current applied to the insulating plate increases suddenly, that is, the current on the electric field power supply system increases suddenly, exceeding the safety current threshold, the hardware protection device and the software protection system will automatically cut off the power supply of the electric field power supply system, and realize the protection of the insulating plate from the hardware and software.

[0050] In this embodiment, the external electric field is generated by a pair of insulating plates embedded in the insulating groove. The insulating plates include a three-layer structure, namely: a conductive layer, an intermediate layer and an insulating layer, wherein the intermediate layer wraps the conductive layer, and the insulating layer wraps the intermediate layer. Figure 1 As shown, an external power source is connected to the conductive layer of the insulating plate.

[0051] Furthermore, the material of the conductive layer is a material with excellent conductivity, specifically including iron and other materials with excellent conductivity; in order to save investment costs, since the conductive layer does not conduct current to participate in the electrolysis reaction, the thickness of the conductive layer is not required to be high, and the thickness of the conductive layer is as thin as possible to minimize the volume of the alkali solution electrolytic cell and reduce construction costs. The material of the middle layer is a high dielectric constant material, specifically including strontium titanate and other high dielectric constant materials; the middle layer uses high dielectric constant materials, so that the thickness of the middle layer can be reduced. The material of the insulating layer is an insulating material, specifically including high-quality insulating materials such as barium titanate or alumina ceramics; the insulating layer uses high-quality insulating materials such as barium titanate or alumina ceramics, so that the thickness of the insulating layer can be reduced. It helps to maximize the use of the electric field to improve the efficiency of electrolysis.

[0052] The reason why the middle layer uses a high dielectric constant material is that the insulating plate composed of the conductive layer, the middle layer, and the insulating layer, the electrolytic plate participating in electrolysis, and the alkali solution between the two are regarded as an outer layer capacitor, and the double electric layer composed of ions near the electrolytic plate participating in electrolysis and the alkali solution in the middle of the double electric layer are regarded as an inner layer capacitor. The calculation formula of capacitance is:

[0053]

[0054] in, Represents capacitance, represents the dielectric constant, represents the plate area, Represents the distance between the plates. The distance between the outer capacitor plates (i.e., the distance between the insulating plate and the electrolytic plate) is much larger than the distance between the inner capacitor plates (i.e., the distance between the double electric layers), so the outer capacitor is much smaller than the inner capacitor. According to the principle of capacitor voltage division, the larger the capacitor, the smaller the electric field divided. Therefore, the smaller the external electric field divided by the double electric layer corresponding to the inner capacitor, the smaller the promoting effect on electrolysis. Therefore, if it is necessary to increase the external electric field divided by the inner capacitor, then it is necessary to reduce the external electric field divided by the outer capacitor, and then increase the outer capacitor. The larger the dielectric constant of the middle layer, the larger the corresponding outer capacitor. Therefore, the middle layer uses a high dielectric constant material. It is necessary to select high-quality insulating materials for the insulating layer because the insulating layer usually has a very large voltage, and the stronger the insulating ability of the material, the greater the allowable voltage. On the other hand, in order to increase the outer capacitance, the thickness of the conductive layer and the middle layer should be as small as possible, and the insulating layer should use high-quality insulating materials with strong insulating ability, and the middle layer should use materials with high dielectric constants, which can help reduce the thickness of the conductive layer and the middle layer.

[0055] It should be noted that the insulating material selected for the insulating layer of the insulating plate has a certain voltage limit. Exceeding the voltage limit will cause damage to the insulating material. Therefore, the electric field power supply system of the insulating plate has a voltage limiting function. Once the voltage limit exceeds the preset voltage threshold, the electric field power supply system of the insulating plate will be automatically cut off, and the control electric field power supply system limit value will be reduced to the threshold of the allowable voltage of the insulating material.

[0056] It is worth mentioning that the embodiment of the present invention also provides a control method for the alkaline solution electrolyzer high-efficiency hydrogen production device based on the external bias electric field in the above embodiment, such as Figure 3 As shown, the specific steps include:

[0057] During the electrolytic hydrogen production process of the alkaline solution hydrogen production electrolyzer, the voltage value of the insulating plate in the electric field power supply system and the electrolysis current value in the electrolysis power supply system are obtained in real time; the duty cycle of the electric field power supply system is controlled according to the output voltage reference value, and the duty cycle of the electrolysis power supply system is controlled according to the electrolysis current reference value to achieve control of the electric field power supply system and the electrolysis power supply system; by controlling the operating mode of the electric field power supply system, electrolytic hydrogen production is promoted and reverse current is suppressed.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An efficient hydrogen production device for alkaline solution electrolyzer based on external bias electric field, characterized in that: include: an alkali solution electrolytic cell, the interior of which is filled with alkali solution; A plurality of electrolytic plates are arranged inside the alkaline solution electrolytic cell; Two external insulating plates are arranged inside the alkaline solution electrolytic cell and are located at the outermost sides of the plurality of electrolytic plates, wherein the external insulating plates include insulating grooves and insulating plates arranged inside the insulating grooves; and An external power source is connected to the insulating plate and the electrolytic plate respectively, the external power source is connected to the insulating plate to form an electric field power supply system, and the external power source is connected to the electrolytic plate to form an electrolytic power supply system; The electric field power supply system is used to supply power to two external insulating plates to generate an external electric field; the electrolysis power supply system is used to supply power to an electrolytic cell stack composed of multiple electrolysis plates to achieve hydrogen production by electrolysis; The insulating plate comprises a conductive layer, an intermediate layer and an insulating layer, wherein the intermediate layer wraps the conductive layer, the insulating layer further wraps the intermediate layer, and the conductive layer is connected to the external power source; The material of the conductive layer is a conductive material, the material of the intermediate layer is a high dielectric constant material, and the material of the insulating layer is an insulating material; The conductive layer is made of iron, the intermediate layer is made of strontium titanate, and the insulating layer is made of barium titanate or alumina ceramics; The insulating groove, the insulating plate and the electrolytic plate are parallel to each other; The electric field power supply system includes two operating modes, namely, a start-up mode and a disconnection mode. In the start-up mode, the electric field distribution of the double electric layer is changed by applying an external electric field on the insulating plate to change ion aggregation and promote electrolytic hydrogen production. In the disconnection mode, the electric field distribution of the double electric layer is changed by applying an external electric field on the insulating plate to prevent the directional movement of ions and suppress reverse current. The direction of the applied electric field on the insulating plate is consistent with the direction of the electrolysis voltage of the alkali solution electrolytic cell; The electric field power supply system is a Boost circuit, which is used as a boost converter to perform voltage control. The Boost circuit includes an inductor. Polarized capacitors , Fast Recovery Diode and FET , the control law of the Boost circuit is: ； in, Indicates the duty cycle of the electric field power supply system; represents the PI controller of the Boost circuit, s is the Laplace operator, represents the proportional coefficient of the PI controller of the Boost circuit, Represents the integral coefficient of the PI controller of the Boost circuit; is the output voltage reference value, is the voltage value of the insulating plate; The electrolytic power supply system is a Buck circuit, which includes an inductor , polarized capacitor , Fast Recovery Diode and FET , the control law of the Buck circuit is: ； in, Indicates the duty cycle of the electrolysis power supply system; represents the PI controller of the Buck circuit, represents the proportional coefficient of the PI controller of the Buck circuit, Represents the integral coefficient of the PI controller of the Buck circuit; is the reference value of electrolysis current, is the electrolysis current value; During the electrolytic hydrogen production process of the alkaline solution hydrogen production electrolyzer, the voltage value of the insulating plate in the electric field power supply system and the electrolysis current value in the electrolysis power supply system are obtained in real time; the duty cycle of the electric field power supply system is controlled according to the output voltage reference value, and the duty cycle of the electrolysis power supply system is controlled according to the electrolysis current reference value to achieve control of the electric field power supply system and the electrolysis power supply system; by controlling the operating mode of the electric field power supply system, electrolytic hydrogen production is promoted and reverse current is suppressed.

2. The high-efficiency hydrogen production device of alkaline solution electrolyzer based on external bias electric field according to claim 1 is characterized in that: The electric field power supply system is also provided with a hardware protection device, which is used to automatically disconnect the hardware protection device to cut off the power supply of the electric field power supply system when the current on the electric field power supply system suddenly increases to be greater than a preset safety current threshold.

3. The high-efficiency hydrogen production device of alkaline solution electrolyzer based on external bias electric field according to claim 1 is characterized in that: The electric field power supply system is also provided with a software protection system, which monitors the excitation current and the excitation current change rate of the electric field power supply system through a program. When the monitored current is greater than a preset safety current threshold, the program is started to shut down and the power supply of the electric field power supply system is automatically cut off.

Images