Method for controlling an electrolytic cell and electrolytic cell

Abstract

This invention relates to the field of hydrogen production through water electrolysis, and discloses a control method and an electrolyzer for electrolyzers. The method includes: calculating the decay index of the left and right half-cells based on their operating status parameters; determining the health status parameters of the left and right half-cells, which are obtained by weighted fusion calculation of the decay indices of the corresponding half-cells; and dynamically allocating power between the left and right half-cells after determining the electrolyzer's operating mode based on the health status parameters of the left and right half-cells under preset safety constraints. The operating modes include a rotating mode, a hot standby mode, and a single half-cell mode. This invention achieves balanced decay of the left and right half-cells by constructing a decay index to assess the health status of the half-cells and by dynamically allocating power and switching operating modes based on the health status, significantly extending the overall system lifespan.

Description

Technical Field

[0001] This invention relates to the field of water electrolysis for hydrogen production, and specifically to a control method for an electrolyzer and an electrolyzer. Background Technology

[0002] Currently, mature commercial water electrolysis units operate at 30%-100% load. However, most electrolyzers require a load above 50% during operation. This is primarily because hydrogen-oxygen cross-contamination is significant in water electrolysis hydrogen production systems below 50% load. As is well known, three main factors affect the purity of oxygen in hydrogen and hydrogen in oxygen within an electrolyzer: 1. System pressure: Higher operating pressure results in lower purity of oxygen in hydrogen and hydrogen in oxygen; 2. Diaphragm performance: Currently, alkaline water electrolysis hydrogen production systems use asbestos or PPS diaphragms; 3. Current density: Lower current density results in lower purity of oxygen in hydrogen and hydrogen in oxygen. Based on this third factor, current density is positively correlated with operating load. Therefore, the lower limit of the operating load for an electrolyzer is constrained by gas purity requirements. According to existing equipment operating experience, a relatively safe lower limit for single-cell operation is 50%. When the load is below 50%, gas purity is difficult to guarantee, and the system safety risk increases significantly.

[0003] Furthermore, existing electrolyzers typically employ a holistic control approach, which fails to allow for differentiated adjustments to different areas within the cell. When localized performance degradation occurs due to prolonged operation, the overall load distribution struggles to accommodate the health status of different regions, often leading to further accelerated degradation in areas with poor performance, thereby impacting the overall lifespan of the electrolyzer. Therefore, improving the operational flexibility of electrolyzers under low-load conditions without increasing safety risks, and mitigating the impact of localized performance degradation on overall lifespan, has become a pressing technical challenge in this field. Summary of the Invention

[0004] In view of this, the present invention provides a method for controlling an electrolytic cell and an electrolytic cell to solve the problem that the uneven health status of an electrolytic cell affects its overall lifespan in the prior art.

[0005] In a first aspect, the present invention provides a control method for an electrolytic cell, the electrolytic cell comprising a left half-cell and a right half-cell electrically isolated from each other, the method comprising: calculating the attenuation index of the left half-cell and the right half-cell respectively based on the operating state parameters of the left half-cell and the right half-cell; determining the health state parameters of the left half-cell and the right half-cell respectively, the health state parameters being obtained by weighted fusion calculation of the attenuation index of the corresponding half-cell; and, under preset safety constraints, determining the working mode of the electrolytic cell based on the health state parameters of the left half-cell and the right half-cell, dynamically allocating the power of the left half-cell and the right half-cell; wherein the working mode includes a rotating mode, a hot standby mode, and a single half-cell mode.

[0006] The electrolytic cell control method provided by this invention achieves a quantitative assessment of the health status of the left and right halves of the electrolytic cell by calculating and determining their respective health status parameters based on the attenuation index of each half. By determining the electrolytic cell's operating mode based on the health status parameters under preset safety constraints and dynamically allocating power to the left and right halves, the electrolytic cell can flexibly switch between rotating mode, hot standby mode, and single-half-cell mode. This achieves differentiated and coordinated control of the left and right halves, effectively delaying further attenuation of the poorly performing half and promoting balanced aging of the left and right halves, thereby extending the overall service life of the electrolytic cell. Simultaneously, the preset safety constraints ensure the operational safety and stability of the electrolytic cell during dynamic adjustment.

[0007] In one optional implementation, the process of calculating the attenuation index of the left and right half-cells based on the operating status parameters of the left and right half-cells includes: obtaining the electrical performance parameters, thermal performance parameters, operating time, and number of start-stop cycles for each half-cell; multiplying the electrical performance parameters, thermal performance parameters, operating time, and number of start-stop cycles by their respective preset weighting coefficients and then summing them to obtain the attenuation index of the corresponding half-cell; wherein, each operating status parameter corresponds to a different weighting coefficient in the weighted calculation, and the weighting coefficient is preset according to the degree of influence of each parameter on the attenuation of the electrolytic cell.

[0008] In one optional implementation, the preset safety constraints include: power constraints, power change rate constraints, total electrolytic cell power constraints, and safe operation constraints. The power constraints include that the operating power of both the left and right halves of the electrolyzer is greater than or equal to the minimum safe operating power, and less than or equal to their respective rated operating power. The power change rate constraints include that the power change rates of both the left and right halves of the electrolyzer are less than or equal to preset rate limits. The total electrolyzer power constraints include that the sum of the distributed power of the left and right halves of the electrolyzer is equal to the total input power of the electrolyzer. The safe operation constraints include that the hydrogen purity is greater than or equal to a first purity threshold, the oxygen purity is greater than or equal to a second purity threshold, and the pressure difference between hydrogen and oxygen is maintained within a safe pressure difference range.

[0009] The electrolytic cell control method provided by this invention limits the operating power of the left and right halves of the cell to between the minimum safe operating power and the rated operating power by setting power constraints. This avoids the risk of hydrogen-oxygen crosstalk due to excessive power and prevents equipment damage caused by power overload. By setting power change rate constraints, the power change rate of the left and right halves of the cell is limited to a preset rate limit, avoiding impact damage to the electrolytic cell caused by sudden power changes and extending the service life of the equipment. By setting total power constraints, the sum of the distributed power of the left and right halves of the cell is ensured to be exactly equal to the total input power of the electrolytic cell, achieving precise power distribution and avoiding system imbalance caused by power distribution errors. By setting safe operation constraints, the purity of hydrogen, the purity of oxygen, and the hydrogen-oxygen pressure difference are controlled within safe threshold ranges, effectively preventing safety accidents caused by excessive gas purity or excessive pressure difference. The synergistic effect of the aforementioned multiple safety constraints ensures that the electrolyzer always operates within the safety boundary during dynamic power distribution and mode switching, achieving a balance between safety and flexibility. This not only guarantees the safe and stable operation of the system but also provides reliable safety assurance for differentiated control based on health status.

[0010] In one optional implementation, the process of determining the operating mode of the electrolytic cell based on the health status parameters of the left and right half-cells includes: calculating a balance index characterizing the degree of balance of the health status parameters of the left and right half-cells; wherein the balance index is obtained by normalizing the absolute value of the difference between the health status parameters of the left and right half-cells; when the balance index is less than or equal to a preset balance threshold, the electrolytic cell is controlled to enter a rotating mode; when the health status parameter of one half-cell is lower than a preset health threshold and the health status parameter of the other half-cell is higher than or equal to a preset health threshold, the electrolytic cell is controlled to enter a hot standby mode; when one half-cell is shut down, the electrolytic cell is controlled to enter a single half-cell mode.

[0011] The electrolytic cell control method provided by this invention calculates a balance index characterizing the degree of balance of health status parameters between the left and right halves of the cell, and uses a normalization process to achieve a quantitative assessment of the difference in health status between the left and right halves, providing a reliable basis for accurate switching of operating modes. When the balance index is less than or equal to a preset balance threshold, the cell enters a rotation mode, which can adjust the load distribution between the left and right halves in a timely manner to prevent further widening of the health status difference. When the health status parameter of one half of the cell is lower than the preset health threshold, the cell enters a hot standby mode, allowing the half of the cell with poor health to rest and maintain its condition, while the half of the cell with better health takes over the load, protecting the half of the cell with degraded performance and ensuring the continuous operation of the system. When one half of the cell shuts down, the cell enters a single half-cell mode, realizing emergency operation capability in case of failure. The above three operating modes and the health status-based switching mechanism enable the electrolytic cell to automatically select the optimal operating mode according to the actual state of the left and right halves, realizing refined management and differentiated protection of the half-cells, further extending the overall service life of the electrolytic cell, and improving the reliability and fault tolerance of the system operation.

[0012] In one optional implementation, when the working mode is a rotating shift mode, the process of dynamically allocating the power of the left and right half-cells includes: within the current rotating shift cycle, determining the power allocation ratio between the left and right half-cells based on the ratio of the health status parameters of the left half-cell to those of the right half-cell; allocating the total power of the electrolytic cell to the left and right half-cells according to the power allocation ratio, such that the half-cell with the higher health status parameter bears the first load, and the half-cell with the lower health status parameter bears the second load; wherein the first load is greater than the second load; when a preset rotating shift cycle is reached, switching the load allocation between the left and right half-cells, so that the half-cell that originally bore the first load switches to bearing the second load, and the half-cell that originally bore the second load switches to bearing the first load, and then entering the next rotating shift cycle with the switched load allocation.

[0013] In one optional implementation, the process of switching the load distribution between the left and right half-slots includes: gradually reducing the power of the half-slot that originally bore the first load, while gradually increasing the power of the half-slot that originally bore the second load; controlling the power of the two half-slots to be equal and maintaining it for a preset time; continuing to reduce the power of the half-slot that originally bore the first load, while continuing to increase the power of the half-slot that originally bore the second load, until the half-slot that originally bore the second load reaches the first load and the half-slot that originally bore the first load reaches the second load.

[0014] In one optional implementation, when the operating mode is hot standby mode, the process of dynamically allocating power between the left and right half-cells includes: identifying the half-cell with health status parameters lower than a preset health threshold as the standby half-cell and identifying the other half-cell as the main operating half-cell; controlling the standby half-cell to be in a hot standby state; wherein, the hot standby state includes: maintaining the temperature of the standby half-cell within a preset ratio range of the normal operating temperature, applying a protection potential to the standby half-cell, and periodically performing pulse operation on the standby half-cell; and allocating all the total power of the electrolytic cell to the main operating half-cell.

[0015] In one optional implementation, when the operating mode is single half-cell mode, the process of dynamically allocating the power of the left half-cell and the right half-cell includes: determining the half-cell that is stopped as the off-line half-cell and the other half-cell as the running half-cell; controlling the off-line half-cell to be in a stopped state and cutting off the power input of the off-line half-cell; allocating all the total power of the electrolytic cell to the running half-cell, and controlling the power of the running half-cell to be less than or equal to a preset overload ratio of its rated power.

[0016] Secondly, the present invention provides an electrolytic cell, comprising: a left half-cell, a right half-cell, an insulating plate, a first rectifier cabinet, a second rectifier cabinet, and a controller, wherein the insulating plate is sandwiched between the left half-cell and the right half-cell to electrically isolate the left half-cell from the right half-cell; the first rectifier cabinet is electrically connected to the left half-cell, and the second rectifier cabinet is electrically connected to the right half-cell, and the first rectifier cabinet and the second rectifier cabinet are independent of each other; the controller is electrically connected to the first rectifier cabinet and the second rectifier cabinet, and the controller is used to drive the first rectifier cabinet and / or the second rectifier cabinet to work according to the input total power command, based on the control method of the electrolytic cell of the first aspect or any corresponding embodiment, so that the corresponding half-cell operates.

[0017] The electrolytic cell provided by this invention achieves electrical isolation between the left and right halves of the cell by clamping an insulating plate between them, allowing the left and right halves to operate independently without interference. By setting up independent first and second rectifier cabinets electrically connected to the left and right halves respectively, independent control of the power supply to the left and right halves is achieved. The controller drives the rectifier cabinets based on the control method described in the first aspect, enabling flexible selection of single-half-cell operation or dual-half-cell coordinated operation according to the health status parameters of the left and right halves. This provides the structural hardware foundation for differentiated power distribution and switching between multiple operating modes, thus ensuring the effective implementation of the electrolytic cell control method at the physical level and improving the operational flexibility and overall lifespan of the electrolytic cell.

[0018] In one optional embodiment, both the left and right halves of the slot include: an end plate, a negative electrode, a positive electrode, and multiple electrode plates, wherein the positive electrode is attached to the surface of the insulating plate; the negative electrode is attached to the surface of the end plate; and multiple electrode plates are disposed between the positive and negative electrodes to divide the space between the positive and negative electrodes into multiple small chambers. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of a control method for an electrolytic cell according to an embodiment of the present invention; Figure 2 This is a composition diagram of an electrolytic cell according to an embodiment of the present invention; Figure 3 This is a diagram illustrating the composition of the control device for an electrolytic cell according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] This embodiment provides a control method for an electrolytic cell, which includes a left half and a right half that are electrically isolated from each other, such as... Figure 1 As shown, the method includes: Step S1: Based on the operating status parameters of the left and right half-slots, calculate the attenuation index of the left and right half-slots respectively.

[0025] Optionally, the attenuation indices of the left and right halves of the electrolyzer are calculated based on their respective operating state parameters, including electrical performance parameters, thermal performance parameters, operating time, and number of start-stop cycles. The electrical performance parameters mainly include the voltage change rate and the current density change rate. The voltage change rate is the most direct indicator reflecting attenuation characteristics such as membrane aging and catalyst deactivation within the electrolyzer, while the current density change rate reflects the trend of electrolysis efficiency. The thermal performance parameters mainly include the temperature change rate, reflecting the influence of temperature on material properties and chemical reaction kinetics. Operating time reflects the cumulative effect on equipment lifespan, while the number of start-stop cycles reflects fatigue damage caused by cyclic stress. By multiplying each of these parameters by its corresponding preset weighting coefficient and then summing them, a quantitative assessment of the performance attenuation degree of each half of the electrolyzer is achieved. The weighting coefficients of each parameter are preset according to their influence on the attenuation of the electrolyzer.

[0026] Step S2: Determine the health status parameters of the left and right half-slots respectively. The health status parameters are obtained by weighted fusion calculation of the attenuation exponents of the corresponding half-slots.

[0027] Specifically, the health status parameter is calculated from the attenuation index of the corresponding half-slot. By subtracting the attenuation index from a value of one, the degree of attenuation is converted into the degree of health. The health status parameter ranges from zero to one, where one indicates that the half-slot is in a brand-new state, and zero indicates that the half-slot is in a completely failed state. Since the attenuation index integrates information from multiple dimensions such as voltage change rate, current density change rate, temperature change rate, cumulative operating time, and number of start-stop cycles, the health status parameter is a comprehensive characterization of the overall health level of the half-slot. It transforms the internal performance degradation of the half-slot, which is difficult to observe directly, into a quantifiable and comparable health indicator, providing an accurate data foundation for subsequent power allocation and mode switching.

[0028] Step S3: Under preset safety constraints, after determining the working mode of the electrolytic cell based on the health status parameters of the left and right half-cells, the power of the left and right half-cells is dynamically allocated; among which, the working modes include rotation mode, hot standby mode and single half-cell mode.

[0029] Specifically, the operating mode of the electrolyzer is determined based on the health status parameters of the left and right halves, and the power is dynamically allocated between the left and right halves under preset safety constraints. First, a balance index characterizing the difference in health status between the left and right halves is calculated. When the balance index falls below a preset threshold, a rotation mode is entered, allocating power according to the ratio of the health status parameters, so that the half with higher health status bears a higher load and the half with lower health status bears a lower load. The load allocation is switched at the end of a preset rotation cycle to achieve balanced attenuation. When the health status of one half falls below a preset health threshold, a hot standby mode is entered, switching the half with poor health status to hot standby, and the half with better health status bears the full load. When one half fails or requires emergency shutdown, a single half-cell mode is entered, and the other healthy half bears the full load. Throughout the entire process, power allocation always meets multiple safety constraints, including power constraints, power change rate constraints, temperature constraints, and gas production constraints.

[0030] The electrolytic cell control method provided in this embodiment calculates and determines the health status parameters of the left and right halves of the electrolytic cell by separately calculating the attenuation index of each half. This enables a quantitative assessment of the health status of the left and right halves of the electrolytic cell. By determining the working mode of the electrolytic cell based on the health status parameters under preset safety constraints and dynamically allocating the power to the left and right halves, the electrolytic cell can flexibly switch between rotating mode, hot standby mode, and single half-cell mode. This achieves differentiated and coordinated control of the left and right halves, effectively delaying further attenuation of the half with poor performance, promoting balanced aging of the left and right halves, and thus extending the overall service life of the electrolytic cell. At the same time, the preset safety constraints ensure the operational safety and stability of the electrolytic cell during dynamic adjustment.

[0031] In some optional implementations, the process of calculating the attenuation index of the left and right half-slots respectively based on the operating state parameters of the left and right half-slots includes: Step S11: Obtain the electrical performance parameters, thermal performance parameters, running time, and number of start-stop cycles for each half-slot.

[0032] Specifically, electrical performance parameters include voltage change rate and current density change rate. Voltage change rate is the most direct and sensitive indicator of electrolytic cell performance degradation, and its changes are mainly caused by factors such as membrane aging, catalyst deactivation, and increased contact resistance. Current density change rate reflects the changing trends of electrolysis efficiency and equipment lifespan, and has a significant impact on the long-term operational stability of the electrolytic cell. Thermal performance parameters include temperature change rate. Temperature has a significant impact on material properties and chemical reaction kinetics; an increase in the temperature change rate accelerates material aging and performance degradation. Operating time reflects the cumulative effect on equipment lifespan, while the number of start-ups and shutdowns reflects the fatigue damage caused by cyclic stress. Frequent start-ups and shutdowns exacerbate mechanical and thermal stresses in the electrolytic cell, accelerating performance degradation. In addition, efficiency change rate can be obtained as a supplementary parameter to comprehensively reflect the overall performance trend of the system.

[0033] Step S12: Multiply the electrical performance parameters, thermal performance parameters, running time and number of start-stop cycles by their respective preset weighting coefficients and sum them to obtain the attenuation index of the corresponding half cell; wherein, each operating state parameter corresponds to a different weighting coefficient in the weighted calculation, and the weighting coefficient is preset according to the degree of influence of each parameter on the attenuation of the electrolytic cell.

[0034] Specifically, the attenuation index DI of the left half-slot L for: DI L =w1×ΔU L +w2×ΔJ L +w3×ΔT L +w4×t L +w5×N L +w6×Δη L (1) The attenuation index DI of the right half-slot R for: DI R =w1×ΔU R +w2×ΔJ R +w3×ΔT R +w4×t R +w5×N R +w6×Δη R (2) Wherein, ΔU L ΔU R The voltage change rates ΔJ for the left and right half-slots, respectively. L ΔJ R The current density change rates of the left and right half-slots are ΔT and ΔT, respectively. L ΔT R The temperature change rates of the left and right halves of the tank are t, respectively. L t RThe cumulative runtime of the left and right half slots, respectively, N L N R The start and stop counts for the left and right halves of the tank are Δη, respectively. L , Δη R These represent the efficiency change rates of the left and right half-slots, respectively, with w1~w5 being weighting coefficients, where: The voltage change rate has the highest weighting coefficient, w1, at 0.3. This is because voltage is the most direct and sensitive indicator of electrolytic cell performance degradation, which is mainly caused by factors such as membrane aging, catalyst deactivation, and increased contact resistance. The current density change rate has a weighting coefficient of w2 of 0.25, reflecting its significant impact on electrolysis efficiency and equipment lifespan. The temperature change rate has a weighting coefficient of w3 of 0.15, taking into account the significant influence of temperature on material properties and chemical reaction kinetics. The operating time and number of start-stop cycles each have weighting coefficients of w4 and w5 of 0.1, reflecting the impact of cumulative effects and cyclic stress on equipment lifespan. The efficiency change rate has a weighting coefficient of w6 of 0.1, comprehensively reflecting the overall performance trend of the system.

[0035] In addition, the health status parameter SOH of the left half-slot L for: SOH L =1-DI L (3) Health status parameter SOH of the right half of the tank R for: SOH R =1-DI R (4) The value of SOH ranges from 0 to 1, where 1 represents a brand new state and 0 represents a completely failed state.

[0036] In some optional implementations, the preset safety constraints include: power constraints, power change rate constraints, total power constraints of the electrolytic cell, and safe operation constraints.

[0037] (1) Power constraints include that the operating power of both the left and right half of the tank is greater than or equal to the minimum safe operating power, and less than or equal to their respective rated operating power, i.e. P Lmin ≤P L ≤P Lrated (5) P Rmin ≤P R ≤P Rrated (6) Among them, P Lmin P is the minimum safe operating power for the left half of the tank. Lrated P is the rated operating power of the left half of the tank. L P is the operating power of the left half of the slot.Rmin P is the minimum safe operating power for the left half of the tank. Rrated P is the rated operating power of the left half of the tank. R This refers to the operating power of the left half of the tank. The minimum safe operating power is typically set at 30% of the rated power. This threshold is primarily based on the gas safety requirements of the electrolyzer. When the electrolyzer operates at low power, the current density is lower, the electrolysis reaction rate slows down, and the amount of gas produced decreases, leading to a significant increase in cross-contamination between hydrogen and oxygen across the diaphragm. When the operating power is below 30% of the rated power, the oxygen content in the hydrogen and the hydrogen content in the oxygen may exceed the explosion limits, posing a serious safety risk. Simultaneously, the operating power must not exceed the rated operating power to prevent irreversible damage to the electrolyzer from overload operation and to ensure the equipment operates under safe conditions.

[0038] (2) The power change rate constraint condition includes that the power change rate of both the left and right half-slots is less than or equal to the preset rate limit, i.e. |P L(t) -P L(t-1) |≤ΔP max (7) |P R(t) -P R(t-1) |≤ΔP max (8) Where, ΔP max For the preset rate limit, |P L(t) -P L(t-1) |P represents the rate of change of power in the left half of the slot between the current time and the previous time. R(t) -P R(t-1) This represents the power change rate of the right half of the cell between the current and previous moments. Electrolytes exhibit asymmetrical dynamic response characteristics during power regulation: rapid power adjustment over a wide range of milliseconds is possible when moving from a high-temperature, high-power point to a low-temperature, low-power point, while adjustment from a low-temperature, low-power point to a high-temperature, high-power point requires minutes. Therefore, the preset rate limit must fully consider the dynamic response characteristics of the electrolyzer to avoid sudden power fluctuations impacting the equipment. Excessive power change rate can cause thermal stress concentration, gas pressure fluctuations, and membrane material fatigue damage, accelerating equipment performance degradation. By limiting the power change rate and ensuring a smooth power transition, the impact of sudden power changes on the equipment can be effectively reduced, improving system stability.

[0039] (3) The total power constraint of the electrolytic cell includes the fact that the sum of the distributed power of the left half of the cell and the right half of the cell is equal to the total input power of the electrolytic cell, i.e. P L +P R =P total (9) Among them, P totalThe total input power of the electrolytic cell is defined as the total input power of the electrolytic cell. This constraint ensures that the sum of the power distributions in the left and right halves of the cell is exactly equal to the total input power of the electrolytic cell, thus achieving precise power distribution and avoiding system power imbalance caused by power distribution errors.

[0040] (4) Safe operation constraints include hydrogen purity greater than or equal to the first purity threshold, oxygen purity greater than or equal to the second purity threshold, and the pressure difference between hydrogen and oxygen maintained within a safe pressure difference range. During operation, the electrolyzer produces hydrogen and oxygen through the electrolysis of water. Gas purity is a key indicator for measuring the safe operation of the electrolyzer. When the hydrogen purity is lower than the first purity threshold or the oxygen purity is lower than the second purity threshold, it indicates that the hydrogen-oxygen cross-contamination phenomenon is intensified, meaning that hydrogen passes through the diaphragm into the oxygen side or oxygen passes through the diaphragm into the hydrogen side, leading to an increase in the concentration of the hydrogen-oxygen mixture, posing a serious safety risk exceeding the explosion limit. The first purity threshold is usually set at 99.9%, and the second purity threshold is usually set at 98.5%. Simultaneously, the pressure difference constraint between hydrogen and oxygen is equally crucial. The gas pressure difference across the diaphragm needs to be maintained within a safe pressure difference range. When the pressure difference is too large, it may cause the diaphragm to deform, rupture, or even perforate, resulting in direct mixing of hydrogen and oxygen and triggering a safety accident. By monitoring hydrogen purity, oxygen purity, and hydrogen-oxygen pressure difference in real time and controlling these parameters within safe threshold ranges, the electrolyzer can ensure that it always meets safe operation requirements during dynamic power distribution and mode switching, effectively preventing safety accidents caused by excessive gas purity or excessive pressure difference.

[0041] In some optional implementations, the process of determining the operating mode of the electrolyzer based on the health status parameters of the left and right halves of the tank includes: Step S31: Calculate the balance index, which characterizes the balance of health status parameters of the left and right halves of the tank; wherein, the balance index is obtained by normalizing the absolute value of the difference between the health status parameters of the left and right halves of the tank.

[0042] Specifically, the balance index E is defined as: E=1-|SOH L -SOH R | / max(SOH L SOH R (10) That is, through the left half-slot health status parameter SOH L With the right half-slot health status parameter SOH RThe balance index is obtained by normalizing the absolute value of the difference between the two halves of the tank and the larger of the two values. The index ranges from 0 to 1. When the health status of the left and right halves of the tank is exactly the same, the balance index is 1; when the health status of one half of the tank approaches 0 and the other half approaches 1, the balance index approaches 0. The balance index accurately reflects the degree of difference in the health status of the left and right halves of the tank, providing a quantitative basis for switching working modes.

[0043] Step S32: When the balance index is less than or equal to the preset balance threshold, control the electrolytic cell to enter the rotation mode.

[0044] Specifically, when the balance index is less than or equal to a preset balance threshold, the electrolyzer enters a rotation mode. The preset balance threshold is typically set to 0.88, a setting based on in-depth analysis of the electrolyzer's operating characteristics and extensive experimental verification. For example, when the difference in health status between the left and right halves of the cell exceeds 12% (i.e., balance index E ≤ 0.88), continued unbalanced operation will accelerate the further degradation of the weaker half, leading to a widening gap in health status between the left and right halves, ultimately affecting the overall system's lifespan. Therefore, when the balance index is less than or equal to 0.88, the rotation mode is triggered. By periodically switching the load distribution between the left and right halves, the healthier half alternates with the weaker half to bear the high load, achieving synchronous degradation of the left and right halves and extending the overall system's lifespan.

[0045] Optionally, the triggering of the rotation mode also takes into account other factors and adopts a multi-parameter comprehensive judgment method. When the temperature difference between the left and right halves of the tank exceeds 10℃, the rotation control is triggered to balance the heat load distribution and prevent thermal stress concentration and material fatigue damage caused by excessive temperature difference.

[0046] Optionally, a fixed rotation cycle can be set, and rotation control can be performed periodically to prevent the widening of health status differences caused by long-term unbalanced operation. The optimized design of the rotation cycle needs to comprehensively consider multiple factors such as the operating characteristics of the electrolyzer, its lifespan impact, and control effectiveness. Cycle optimization studies based on lifespan impact show that different types of start-ups and shutdowns have differentiated effects on the electrolyzer's lifespan: the impact coefficient for cold start is 1.2, for hot start it is 0.5, and for emergency shutdown it is 1.5. Therefore, the rotation cycle should be set to minimize unnecessary start-ups and shutdowns.

[0047] The optimization objective of the rotation period T is to minimize the total lifetime consumption minf(T): minf(T) = α × N start (T)+β×ΔSOH(T)(11) Where, N start(T) represents the number of start-stop cycles within period T, ΔSOH(T) represents the health status decay within period T, and α and β are weighting coefficients. Through simulation analysis of lifespan consumption under different rotation cycles, the optimal rotation cycle was determined to be 8 hours. Cycle optimization based on control effect also verified that 8 hours is the optimal cycle. A rotation cycle that is too short will lead to frequent power switching, affecting system stability; a rotation cycle that is too long may lead to excessive differences in health status, negating the significance of rotation control. By establishing a rotation control effect evaluation model, comprehensively considering indicators such as health status balance, power allocation rationality, and system stability, 8 hours was determined as the optimal rotation cycle. This cycle can effectively balance the health status of the left and right halves of the tank without causing excessive start-stop cycles. The triggering condition for rotation control adopts a multi-parameter comprehensive judgment method, calculating the trigger probability through weighted summation, comprehensively considering multiple factors such as health status balance, temperature difference, and running time, ensuring that rotation control can be activated promptly in the event of abnormal conditions, guaranteeing the safe and stable operation of the electrolyzer.

[0048] Step S33: When the health status parameter of one half-cell is lower than the preset health threshold, and the health status parameter of the other half-cell is higher than or equal to the preset health threshold, control the electrolytic cell to enter the hot standby mode.

[0049] Specifically, when the health status parameter of one half-cell falls below a preset health threshold, while the health status parameter of the other half-cell is higher than or equal to the preset health threshold, the electrolyzer enters a hot standby mode. The preset health threshold is typically set between 0.3 and 0.5. When the health status parameter of a half-cell falls below this threshold, it indicates that the performance of that half-cell has severely deteriorated, and continued operation under load may cause irreversible damage or even a safety accident. In this case, the half-cell with the poorer health status is switched to hot standby mode. The auxiliary heating system maintains the half-cell temperature at 60% to 70% of the normal operating temperature, an appropriate protective potential is applied to prevent electrode material oxidation, and small current pulses are periodically applied to maintain catalyst activity. Simultaneously, the half-cell with the better health status bears the full load, ensuring continuous system operation. The hot standby mode protects the half-cell with deteriorating performance while avoiding the impact of frequent start-ups and shutdowns on the equipment.

[0050] Step S34: When one half of the cell stops, control the electrolytic cell to enter single half cell mode.

[0051] Specifically, when one half-cell shuts down, the electrolytic cell enters single-half-cell mode. Reasons for shutdown may include half-cell malfunction, the need for emergency shutdown, or maintenance. In single-half-cell mode, all load is borne by the normal half-cell, while the faulty half-cell is completely shut down. At this time, it is necessary to strengthen temperature monitoring of the operating half-cell to prevent localized overheating; the power of the operating half-cell should not exceed 120% of its rated power to avoid overload operation; simultaneously, it is crucial to strengthen monitoring of safety parameters such as gas purity and pressure to ensure safe operation of the system even under extreme conditions. Single-half-cell mode enables emergency operation in case of failure, improving the reliability and fault tolerance of the electrolytic cell system.

[0052] In some optional implementations, when the operating mode is a rotating mode, the process of dynamically allocating power between the left and right half-slots includes: (1) During the current rotation period, the power distribution ratio between the left and right half-slots is determined based on the ratio of the health status parameters of the left half-slot to the health status parameters of the right half-slot.

[0053] (2) The total power of the electrolytic cell is distributed to the left half and the right half according to the power distribution ratio, so that the half with higher health status parameters bears the first load and the half with lower health status parameters bears the second load; wherein the first load is greater than the second load.

[0054] (3) When the preset rotation cycle is reached, the load distribution of the left half and the right half is switched so that the half that originally carried the first load is switched to carry the second load, and the half that originally carried the second load is switched to carry the first load, and the next rotation cycle is entered with the switched load distribution.

[0055] Specifically, within the current rotation cycle, the power allocation ratio is first determined based on the ratio of the health status parameters of the left half-slot to those of the right half-slot. This allocation ratio follows the core principle that the half-slot with higher health status bears more load, i.e., the ratio of the power of the left half-slot to the power of the right half-slot equals the state of health (SOH). L With SOH RThe ratio of the two halves of the electrolyzer is used to determine the load distribution. The total input power is then allocated to the left and right halves according to this ratio, ensuring that the half with higher health parameters bears the first load (higher power) and the half with lower health parameters bears the second load (lower power). This dynamic allocation strategy mitigates further degradation in the weaker half. When a preset rotation cycle is reached (typically 8 hours, determined based on optimization of lifespan impact and control effectiveness, aiming to minimize total lifespan consumption while considering start-stop frequency and health degradation), the load distribution between the left and right halves is switched. The half that previously bore the first load switches to the second load, and the half that previously bore the second load switches to the first load, entering the next rotation cycle with the switched load distribution. By periodically switching the load distribution, the left and right halves alternately bear high loads, achieving balanced health degradation and thus extending the overall lifespan of the electrolyzer.

[0056] Specifically, the process of switching the load distribution between the left and right halves of the slot includes: (1) Gradually reduce the power of the half-tank that originally bore the first load, while gradually increasing the power of the half-tank that originally bore the second load.

[0057] (2) Control the power of the two half-slots to be equal and maintain it for a preset time.

[0058] (3) Continue to reduce the power of the half-slot that originally bore the first load, and at the same time continue to increase the power of the half-slot that originally bore the second load, until the half-slot that originally bore the second load reaches the first load and the half-slot that originally bore the first load reaches the second load.

[0059] Specifically, a gradual switching strategy is adopted to avoid the impact of sudden power changes on the equipment. This strategy includes three stages: First, in the pre-switching stage, the power of the half-cell originally bearing the first load is gradually reduced, while the power of the half-cell originally bearing the second load is gradually increased, causing the power on both sides to begin to move towards equilibrium. When the power on both sides is close, the power balance stage is entered, where the power of the left and right half-cells is controlled to be equal and maintained for a preset time to ensure a stable transition of the system at the power balance point, creating conditions for subsequent load transfer. Then, in the load transfer stage, the power of the half-cell originally bearing the first load is further reduced, while the power of the half-cell originally bearing the second load is further increased, until the half-cell originally bearing the second load reaches the first load and the half-cell originally bearing the first load reaches the second load, completing the complete switch of the load distribution ratio. Through this smooth transition, the thermal stress impact and mechanical vibration caused by sudden power changes to the electrolytic cell are effectively reduced, improving the stability of system operation and the service life of the equipment.

[0060] In some optional implementations, when the operating mode is hot standby mode, the process of dynamically allocating power between the left and right half-slots includes: (1) The half-slot whose health status parameter is lower than the preset health threshold is designated as the standby half-slot, and the other half-slot is designated as the main running half-slot.

[0061] (2) Control the standby half-slot to be in a hot standby state; wherein, the hot standby state includes: maintaining the temperature of the standby half-slot within a preset ratio range of the normal operating temperature, applying a protection potential to the standby half-slot, and periodically performing pulse operation on the standby half-slot.

[0062] (3) Allocate the total power of the electrolytic cell to the main operating half cell.

[0063] Specifically, the roles of the left and right half-cells are first determined based on their health status parameters. The half-cell with health status parameters below a preset health threshold (usually set between 0.3 and 0.5) is designated as the standby half-cell, and the other half-cell is designated as the main operating half-cell. Then, the standby half-cell is kept in a hot standby state. In this state, the temperature of the standby half-cell is maintained within 60% to 70% of the normal operating temperature by an auxiliary heating system to prevent the material from becoming brittle due to excessively low temperature or aging due to excessively high temperature. At the same time, an appropriate protective potential is applied to the standby half-cell to suppress the oxidation and corrosion of the electrode material during the standby process. The standby half-cell is also periodically subjected to small current pulse operation to maintain catalyst activity and prevent performance degradation. While the standby half-cell is in a hot standby state, all the total input power of the electrolytic cell is allocated to the main operating half-cell, which bears the entire load to ensure the continuous and stable operation of the system. This hot standby control strategy protects the half-cells in poor health, preventing irreversible damage from further load operation, while ensuring the continuous operation capability of the electrolyzer even when the performance of one half-cell deteriorates. At the same time, by maintaining the temperature and activity of the standby half-cell, it enables it to be put into operation at any time, thus improving the reliability and flexibility of the system.

[0064] In some optional implementations, when the operating mode is single half-slot mode, the process of dynamically allocating power between the left and right half-slots includes: (1) The half of the tank that is stopped is designated as the out-of-service half tank, and the other half tank is designated as the operating half tank.

[0065] (2) Control the shutdown half tank to be in a shutdown state and cut off the power input of the shutdown half tank.

[0066] (3) Allocate the total power of the electrolytic cell to the operating half cell and control the power of the operating half cell to be less than or equal to the preset overload ratio of its rated power.

[0067] Specifically, the half-cell that malfunctions, requires emergency shutdown, or needs maintenance is first designated as the shut-down half-cell, while the other half-cell is designated as the operating half-cell. Then, the shut-down half-cell is kept completely shut down, its power input is cut off, and it is electrically isolated from the system to prevent the fault from spreading or causing a safety accident. Finally, the total input power of the electrolyzer is allocated entirely to the operating half-cell, which bears the full load. Simultaneously, the power of the operating half-cell is controlled to be less than or equal to a preset overload ratio (usually 120%) of its rated power to prevent overheating, accelerated material aging, or insulation damage due to overload operation. During single-half-cell operation, temperature, gas purity, and pressure monitoring of the operating half-cell are strengthened. When the temperature exceeds the safety limit, the power is reduced; when the gas purity falls below the safety threshold, an alarm signal is issued; and when the gas pressure difference exceeds the safety range, a depressurization operation is performed. This single-half-cell control strategy achieves emergency operation capability under extreme conditions, ensuring that the electrolyzer can maintain basic operation even if part of the half-cell fails, thus improving the system's reliability and fault tolerance.

[0068] This embodiment provides an electrolytic cell, such as Figure 2 As shown, it includes: left half slot 1, right half slot 2, insulation board 3, first rectifier cabinet 4, second rectifier cabinet 5 and controller 6.

[0069] Figure 2 In the middle, the insulating plate 3 is sandwiched between the left half slot 1 and the right half slot 2 to electrically isolate the left half slot 1 and the right half slot 2; the first rectifier cabinet 4 is electrically connected to the left half slot 1, and the second rectifier cabinet 5 is electrically connected to the right half slot 2. The first rectifier cabinet 4 and the second rectifier cabinet 5 are independent of each other.

[0070] Specifically, Figure 2 In the middle, the insulating plate 3 completely isolates the left half-slot 1 from the right half-slot 2 electrically, allowing the two half-slots to operate independently without interfering with each other. The first rectifier cabinet 4 is electrically connected to the left half-slot 1 and is used to provide DC power to the left half-slot 1; the second rectifier cabinet 5 is electrically connected to the right half-slot 2 and is used to provide DC power to the right half-slot 2; the first rectifier cabinet 4 and the second rectifier cabinet 5 are independent of each other, can be controlled and output independently, and do not affect each other.

[0071] The controller 6 is electrically connected to the first rectifier cabinet 4 and the second rectifier cabinet 5. The controller 6 is used to control the electrolytic cell based on the above embodiment or any of its corresponding embodiments. The controller 6 drives the first rectifier cabinet 4 and / or the second rectifier cabinet 5 to work according to the input total power command, so that the corresponding half cell is in operation.

[0072] The electrolytic cell provided in this embodiment achieves electrical isolation between the left and right halves of the cell by clamping an insulating plate between them, allowing the left and right halves to operate independently without interference. By setting up independent first and second rectifier cabinets, which are electrically connected to the left and right halves respectively, independent control of the power supply to the left and right halves is achieved. The controller drives the rectifier cabinets based on the control method described in the first aspect, and can flexibly select single-half-cell operation or dual-half-cell coordinated operation according to the health status parameters of the left and right halves. This provides the electrolytic cell with the structural hardware foundation for differentiated power distribution and switching between multiple operating modes, thereby ensuring the effective implementation of the electrolytic cell control method at the physical level and improving the operational flexibility and overall lifespan of the electrolytic cell.

[0073] In some alternative implementations, such as Figure 2 As shown, both the left half-groove 1 and the right half-groove 2 include: end pressure plates (11, 21), negative electrodes (12, 22), positive electrodes (13, 23) and multiple electrode plates (not shown in the figure). The positive electrode is attached to the surface of the insulating plate 3; the negative electrode is attached to the surface of the end pressure plate; and multiple electrode plates are disposed between the positive electrode and the negative electrode to divide the space between the positive electrode and the negative electrode into multiple small chambers.

[0074] Specifically, Figure 2 In this design, both the left half-cell (1) and the right half-cell (2) employ the same internal structural design. Specifically, each half-cell includes an end plate, a negative electrode, a positive electrode, and multiple electrode plates. The positive electrode is attached to the surface of the insulating plate, and the negative electrode is attached to the surface of the end plate. Multiple electrode plates are arranged parallel and spaced apart between the positive and negative electrodes, dividing the space between them into multiple sequentially arranged small chambers. When the rectifier cabinet supplies direct current to the half-cell, the current flows through the positive electrode, electrode plates, and negative electrode, and an electrolytic reaction occurs in each small chamber, decomposing water into hydrogen and oxygen. Because the positive electrode is closely attached to the insulating plate, and the positive electrodes of the two half-cells are arranged back-to-back, the electric fields of the two half-cells are independent, further enhancing the electrical isolation effect. At the same time, the arrangement of multiple electrode plates increases the electrode reaction area, improving electrolysis efficiency, while the small chamber structure ensures the uniformity of gas-liquid flow during electrolysis, facilitating the timely discharge of gaseous products and ensuring the stable progress of the electrolysis reaction.

[0075] This embodiment also provides a control device for an electrolytic cell, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0076] This embodiment provides a control device for an electrolytic cell, such as... Figure 3As shown, it includes: The attenuation index acquisition module 301 is used to calculate the attenuation index of the left half-slot and the right half-slot based on the operating status parameters of the left half-slot and the right half-slot, respectively.

[0077] The health status judgment module 302 is used to determine the health status parameters of the left half-slot and the right half-slot respectively. The health status parameters are obtained by weighted fusion calculation of the attenuation index of the corresponding half-slot.

[0078] The operation mode control module 303 is used to dynamically allocate power to the left and right half of the electrolytic cell after determining the working mode of the electrolytic cell based on the health status parameters of the left and right half of the cell under preset safety constraints; the working modes include rotation mode, hot standby mode and single half cell mode.

[0079] The control device for the electrolytic cell provided in this embodiment of the invention can execute the method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects for executing the method. Further functional descriptions of the various modules and units described above are the same as those in the corresponding embodiments described above, and will not be repeated here. Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0080] The following is a detailed reference. Figure 4 The diagram illustrates a structural schematic suitable for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, graphics processor, etc.) 001, which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 002 or a program loaded from memory 008 into random access memory (RAM) 003. The RAM 003 also stores various programs and data required for the operation of the electronic device. The processor 001, ROM 002, and RAM 003 are interconnected via bus 004. An input / output (I / O) interface 005 is also connected to bus 004.

[0081] Typically, the following devices can be connected to I / O interface 005: input devices 006 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 007 including, for example, liquid crystal displays (RCDs), speakers, vibrators, etc.; memory devices 008 including, for example, magnetic tapes, hard disks, etc.; and communication devices 009. Communication device 009 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 4 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0082] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication device 009, or installed from memory 008, or installed from ROM 002. When the computer program is executed by processor 001, it performs the functions defined in the methods of the embodiments of the present invention.

[0083] Figure 4 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0084] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0085] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0086] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for controlling an electrolytic cell, characterized in that, The electrolytic cell includes a left half and a right half that are electrically isolated from each other, and the method includes: Based on the operating status parameters of the left half-slot and the right half-slot, the attenuation index of the left half-slot and the right half-slot is calculated respectively. The health status parameters of the left half-slot and the right half-slot are determined respectively. The health status parameters are obtained by weighted fusion calculation of the attenuation index of the corresponding half-slot. Under preset safety constraints, after determining the working mode of the electrolytic cell based on the health status parameters of the left half-cell and the right half-cell, the power of the left half-cell and the right half-cell is dynamically allocated; wherein, the working mode includes a rotating mode, a hot standby mode and a single half-cell mode.

2. The control method for an electrolytic cell according to claim 1, characterized in that, The process of calculating the attenuation index of the left and right half-slots based on their operating state parameters includes: Obtain the electrical performance parameters, thermal performance parameters, running time, and number of start-stop cycles for each half-tank; The electrical performance parameters, thermal performance parameters, running time, and number of start-stop cycles are multiplied by their respective preset weighting coefficients and then summed to obtain the attenuation index of the corresponding half-slot. In the weighted calculation, each operating status parameter corresponds to a different weight coefficient, which is preset according to the degree of influence of each parameter on the electrolytic cell attenuation.

3. The control method for an electrolytic cell according to claim 1, characterized in that, The preset safety constraints include: power constraints, power change rate constraints, total power constraints of the electrolytic cell, and safe operation constraints, wherein... The power constraint conditions include that the operating power of both the left and right half slots is greater than or equal to the minimum safe operating power, and is less than or equal to their respective rated operating power. The power change rate constraint condition includes that the power change rate of both the left half-slot and the right half-slot is less than or equal to a preset rate limit. The total power constraint of the electrolytic cell includes the fact that the sum of the power allocated to the left half of the cell and the right half of the cell is equal to the total input power of the electrolytic cell. The safe operation constraints include hydrogen purity greater than or equal to a first purity threshold, oxygen purity greater than or equal to a second purity threshold, and the pressure difference between hydrogen and oxygen maintained within a safe pressure difference range.

4. The control method for an electrolytic cell according to claim 1, characterized in that, The process of determining the operating mode of the electrolytic cell based on the health status parameters of the left half and the right half includes: Calculate a balance index that characterizes the degree of balance between the health status parameters of the left and right halves of the trough; wherein the balance index is obtained by normalizing the absolute value of the difference between the health status parameters of the left and right halves of the trough. When the balance index is less than or equal to the preset balance threshold, the electrolytic cell is controlled to enter the rotation mode. When the health status parameter of one half-cell is lower than the preset health threshold, and the health status parameter of the other half-cell is higher than or equal to the preset health threshold, the electrolytic cell is controlled to enter the hot standby mode. When one half of the cell stops, the electrolytic cell is controlled to enter single half cell mode.

5. The control method for an electrolytic cell according to claim 4, characterized in that, When the working mode is the rotating mode, the process of dynamically allocating power between the left and right half-slots includes: Within the current rotation cycle, the power allocation ratio between the left and right halves of the slot is determined based on the ratio of the health status parameters of the left half to those of the right half. The total power of the electrolytic cell is allocated to the left and right halves of the cell according to the power allocation ratio, such that the half with the higher health status parameter bears the first load and the half with the lower health status parameter bears the second load; wherein the first load is greater than the second load. When the preset rotation cycle is reached, the load distribution of the left and right half of the tank is switched, so that the half that originally carried the first load switches to carry the second load, and the half that originally carried the second load switches to carry the first load, and the next rotation cycle is entered with the switched load distribution.

6. The control method for an electrolytic cell according to claim 5, characterized in that, The process of switching the load distribution between the left and right halves of the slot includes: Gradually reduce the power of the half-tank that originally bore the first load, while gradually increasing the power of the half-tank that originally bore the second load. Control the power of the two half-slots to be equal and maintain it for a preset time; Continue to reduce the power of the half-slot that originally bore the first load, while continuing to increase the power of the half-slot that originally bore the second load, until the half-slot that originally bore the second load reaches the first load and the half-slot that originally bore the first load reaches the second load.

7. The control method for an electrolytic cell according to claim 4, characterized in that, When the operating mode is hot standby mode, the process of dynamically allocating power between the left and right half-slots includes: The half-slot whose health status parameters are lower than the preset health threshold is designated as the standby half-slot, and the other half-slot is designated as the main running half-slot. The standby half-slot is controlled to be in a hot standby state; wherein, the hot standby state includes: maintaining the temperature of the standby half-slot within a preset ratio range of the normal operating temperature, applying a protection potential to the standby half-slot, and periodically performing pulse operation on the standby half-slot; The total power of the electrolytic cell is allocated to the main operating half-cell.

8. The control method for an electrolytic cell according to claim 4, characterized in that, When the operating mode is single half-slot mode, the process of dynamically allocating power between the left and right half-slots includes: The half of the tank that is shut down is designated as the out-of-service half, and the other half is designated as the operating half. Control the shut-off half-slot to be in a stopped state and cut off the power input of the shut-off half-slot; The total power of the electrolytic cell is allocated to the operating half-cell, and the power of the operating half-cell is controlled to be less than or equal to a preset overload ratio of its rated power.

9. An electrolytic cell, characterized in that, include: Left half-slot, right half-slot, insulating board, first rectifier cabinet, second rectifier cabinet and controller, wherein, The insulating plate is sandwiched between the left half-groove and the right half-groove to electrically isolate the left half-groove from the right half-groove; The first rectifier cabinet is electrically connected to the left half-slot, and the second rectifier cabinet is electrically connected to the right half-slot. The first rectifier cabinet and the second rectifier cabinet are independent of each other. The controller is electrically connected to the first rectifier cabinet and the second rectifier cabinet. The controller is used to drive the first rectifier cabinet and / or the second rectifier cabinet to work according to the total power input command based on the control method of the electrolytic cell according to any one of claims 1 to 8, so that the corresponding half cell is running.

10. The electrolytic cell according to claim 9, characterized in that, Both the left and right halves of the groove include: an end plate, a negative electrode, a positive electrode, and multiple electrode plates, wherein... The positive electrode is attached to the surface of the insulating plate; The negative electrode is attached to the surface of the end pressure plate; Multiple electrode plates are disposed between the positive electrode and the negative electrode to divide the space between the positive electrode and the negative electrode into multiple small chambers.

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