Failure analysis method and device for electrolytic cell and storage medium
By acquiring the various voltage losses during electrolytic processing of electrolytic cells for in-situ comparison, the data distortion problem caused by non-in-situ characterization is solved, and a more accurate electrolytic cell failure analysis is achieved.
Patent Information
- Application Number
- CN202510526936.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-08-15
AI Technical Summary
In the failure analysis of electrolytic cells, non-in-situ characterization leads to data distortion, resulting in inaccurate analysis results.
In situ comparisons are performed to determine the cause of failure by obtaining a variety of voltage losses of the electrolytic cell during electrolysis processing, including ohmic loss, kinetic loss and mass transfer loss.
It improves the accuracy of electrolytic cell failure analysis, reduces data errors, and provides more accurate failure analysis results.
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Figure CN120485874A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of water electrolysis, and in particular to a failure analysis method, equipment, and storage medium for an electrolytic cell. Background Art
[0002] An electrolyzer is a device that converts electrical energy into chemical energy. It is an important technology for achieving green hydrogen production and is of great significance for promoting energy transformation and reducing carbon emissions.
[0003] Failure analysis of electrolytic cells can be performed through ex situ characterization of components within the cell. However, ex situ characterization can easily distort the measured data, leading to inaccurate failure analysis results. Summary of the Invention
[0004] The embodiments of the present application provide a failure analysis method, device, and storage medium for an electrolytic cell, aiming to improve the accuracy of the failure analysis results of the electrolytic cell.
[0005] In a first aspect, an embodiment of the present application provides a failure analysis method for an electrolytic cell, the failure analysis method for an electrolytic cell comprising:
[0006] Obtain various voltage losses during electrolysis in an electrolytic cell;
[0007] Comparing the plurality of voltage losses to obtain a voltage loss comparison result;
[0008] The failure cause of the electrolytic cell is determined based on the voltage loss comparison result.
[0009] In one embodiment, the obtaining of various voltage losses during electrolysis in the electrolytic cell includes:
[0010] Controlling the electrolytic cells to perform electrolysis treatment in sequence according to a plurality of preset test currents;
[0011] Determining, based on the test current, a current density when the electrolytic cell performs electrolysis treatment;
[0012] A plurality of the voltage losses of the electrolytic cell at each of the current densities are obtained.
[0013] In one embodiment, the multiple voltage losses include ohmic losses, and obtaining the multiple voltage losses of the electrolytic cell at each current density includes:
[0014] Obtaining an open circuit impedance value of the electrolytic cell;
[0015] The ohmic loss of the electrolytic cell at each current density is determined based on the open circuit impedance value and each test current.
[0016] In one embodiment, the multiple voltage losses also include kinetic losses, and obtaining the multiple voltage losses of the electrolytic cell at each current density further includes:
[0017] Obtaining polarization curve data when the electrolytic cell performs electrolysis, wherein the polarization curve data includes an electrode potential of the electrolytic cell at each current density;
[0018] Using the ohmic loss of the electrolytic cell at each current density, correcting the electrode potential of the electrolytic cell at the current density to obtain a corrected potential of the electrolytic cell at the current density;
[0019] The kinetic loss of the electrolytic cell at each of the current densities is determined based on the corrected potential of the electrolytic cell at the current density.
[0020] In one embodiment, determining the kinetic loss of the electrolytic cell at each current density based on the corrected potential of the electrolytic cell at each current density comprises:
[0021] performing fitting processing on the current density and the corrected potential of the electrolytic cell at each current density to obtain a correlation between the current density and the corrected potential;
[0022] The corrected potential associated with each current density in the correlation is used as the kinetic loss of the electrolytic cell at the current density.
[0023] In one embodiment, the method of using the ohmic loss of the electrolytic cell at each current density to correct the electrode potential of the electrolytic cell at the current density includes:
[0024] Obtaining the equilibrium potential of the electrolytic cell at each current density;
[0025] determining the overpotential of the electrolytic cell at the current density based on the equilibrium potential and the electrode potential of the electrolytic cell at each current density;
[0026] The ohmic loss of the electrolytic cell at each current density is used to correct the overpotential of the electrolytic cell at the current density.
[0027] In one embodiment, the multiple voltage losses also include mass transfer losses, and obtaining the multiple voltage losses of the electrolytic cell at each current density further includes:
[0028] Obtaining a reversible electrolysis voltage when the electrolytic cell performs electrolysis treatment;
[0029] The mass transfer loss of the electrolytic cell at each current density is determined using the electrode potential of the electrolytic cell at each current density, the ohmic loss, the kinetic loss, and the reversible electrolysis voltage.
[0030] In one embodiment, the comparing the multiple voltage losses to obtain a voltage loss comparison result includes:
[0031] determining a plurality of curves of the voltage loss relative to the current density during electrolysis in the electrolytic cell;
[0032] determining area proportions of the plurality of voltage losses based on the areas under the change curves;
[0033] The voltage loss comparison result is determined based on a size relationship between the area proportions of the multiple voltage losses.
[0034] In a second aspect, an embodiment of the present application provides a failure analysis device for an electrolytic cell, the failure analysis device for an electrolytic cell comprising:
[0035] An acquisition module, used for acquiring various voltage losses during electrolysis in the electrolytic cell;
[0036] a comparison module, configured to compare the plurality of voltage losses to obtain a voltage loss comparison result;
[0037] A determination module is used to determine the failure cause of the electrolytic cell according to the voltage loss comparison result.
[0038] In a third aspect, an embodiment of the present application provides a failure analysis device for an electrolytic cell, the failure analysis device for the electrolytic cell comprising a processor and a memory, the memory storing a computer program, the computer program being configured to be executed by the processor to implement the failure analysis method for the electrolytic cell as described in any one of the above items.
[0039] In a fourth aspect, an embodiment of the present application provides a computer storage medium storing a computer program, wherein the computer program is configured to be executed by a processor to implement the failure analysis method of the electrolytic cell as described in any one of the above items.
[0040] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program or instructions, which are executed by a processor to implement the failure analysis method of the electrolytic cell as described in any one of the above items.
[0041] Beneficial effects of the embodiments of the present application:
[0042] In an embodiment of the present application, failure analysis of the electrolytic cell is achieved by obtaining multiple voltage losses when the electrolytic cell is undergoing electrolysis treatment and comparing the multiple voltage losses. Since the multiple voltage losses are obtained in situ through the electrolytic cell, compared with the non-in situ characterization of the components in the electrolytic cell, the in situ failure analysis of the electrolytic cell can make the measured data more accurate, and the failure analysis results of the electrolytic cell are also more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0044] Figure 1 This is a schematic flow chart of an embodiment of a failure analysis method for an electrolytic cell provided in an embodiment of the present application;
[0045] Figure 2 is a schematic diagram of the ohmic loss of the electrolytic cell at each current density provided by an embodiment of the present application;
[0046] Figure 3 is a schematic diagram of polarization curve data when the electrolytic cell provided in an embodiment of the present application performs electrolysis treatment;
[0047] Figure 4 Schematic diagram of the kinetic loss of the electrolytic cell at each current density provided in the embodiment of the present application;
[0048] Figure 5 Schematic diagram of mass transfer loss of an electrolytic cell at each current density provided in an embodiment of the present application;
[0049] Figure 6 is a schematic diagram of the area ratios of various voltage losses provided in the embodiments of the present application;
[0050] Figure 7 It is a schematic structural diagram of an embodiment of the failure analysis equipment of the electrolytic cell provided in the embodiments of the present application.
[0051] in, Figure 6 For color pictures, use different colors to distinguish Figure 6 Different objects in . DETAILED DESCRIPTION
[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In addition, in the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0053] In the related art, the working voltage of the electrolyzer during operation may deviate from the theoretical reversible voltage. This may be due to irreversible changes in key components in the electrolyzer (such as membrane electrodes, etc.), which increases the working voltage and reduces the electrolysis efficiency of the electrolyzer. When the working voltage rises sharply, the electrolyzer will fail and stop producing hydrogen and oxygen. When the working voltage deviates significantly from the theoretical reversible voltage, the failure analysis of the electrolyzer should be carried out as soon as possible. However, the non-in situ characterization of the components in the electrolyzer cannot fully simulate the behavior under actual working conditions due to the lack of electrochemical control, and some tests require the destruction of samples. Using this result to analyze the failure of the electrolyzer is likely to cause data distortion and inaccurate failure analysis results.
[0054] To this end, embodiments of the present application provide a method, apparatus, and storage medium for analyzing electrolytic cell failure. By acquiring and comparing various voltage losses during electrolysis, the electrolytic cell failure analysis is performed. Because the various voltage losses are acquired in situ within the electrolytic cell, in situ failure analysis of the electrolytic cell can produce more accurate measured data and more accurate electrolytic cell failure analysis results compared to ex situ characterization of components within the electrolytic cell. For a more detailed description of the method, please refer to the following.
[0055] In the first aspect, the embodiments of the present application provide a method for failure analysis of an electrolytic cell. Specifically, referring to Figure 1 , Figure 1 The figure is a flow chart of an embodiment of a failure analysis method for an electrolytic cell. Figure 1 The failure analysis method of the electrolytic cell may include:
[0056] 101. Obtain various voltage losses during electrolysis in an electrolytic cell.
[0057] In the embodiments of this application, an electrolyzer refers to a device that converts electrical energy into chemical energy through electrolysis. For example, the electrolyzer can be a water electrolyzer, which produces hydrogen (H2) and oxygen (O2) by electrolyzing water (H2O). This process is based on the electrolysis reaction of water, whereby water molecules are decomposed into hydrogen ions (H+) and hydroxide ions (OH-) under the action of an electric field. These are then reduced and oxidized at electrodes to produce H2 and O2, respectively.
[0058] When electrolysis is carried out in an electrolytic cell, there will be a variety of voltage losses, which may include, for example, ohmic losses, kinetic losses, mass transfer losses, and the like. Among them, ohmic losses are voltage losses caused by the resistance generated when the current passes through the electrolytic cell and the electrode assembly during the electrolysis process. Kinetic losses are caused by the increase in electrolysis voltage due to the limited electrode reaction rate (such as excessive activation energy, insufficient catalyst activity, or poor reactant transport). Mass transfer losses can be subdivided into diffusion losses and bubble overpotential. Diffusion losses occur when bubbles partially block the pore network and limit the water supply. Bubble overpotential occurs when very large bubbles shield the electrochemically active area. The various voltage losses during electrolysis in an electrolytic cell can be obtained through actual measurements of the electrolytic cell during electrolysis.
[0059] In some embodiments of the present application, the electrolytic cell may be a failed electrolytic cell, so that failure analysis is performed on the failed electrolytic cell.
[0060] In some embodiments of the present application, since the voltage loss of the electrolytic cell may be different at different current densities, electrolysis treatment may be performed sequentially for different current densities to determine the corresponding voltage loss. Specifically, obtaining a variety of voltage losses when the electrolytic cell is undergoing electrolysis treatment may include: sequentially controlling the electrolytic cell to perform electrolysis treatment according to a plurality of preset test currents; determining the current density of the electrolytic cell when the electrolytic cell is undergoing electrolysis treatment based on the test current, for example, the ratio of the test current I to the electrolysis reaction area S when the electrolytic cell is undergoing electrolysis treatment may be used as the current density i when the electrolytic cell is undergoing electrolysis treatment, that is, i=I / S, and the unit of the current density i may be, for example, A / cm 2 (amperes per square centimeter), the unit of the test current I can be, for example, A (ampere), and the unit of the electrolytic reaction area S can be, for example, cm 2 (square centimeters); obtain various voltage losses of the electrolytic cell at each current density.
[0061] In some embodiments of the present application, taking the multiple voltage losses including ohmic loss as an example, obtaining the multiple voltage losses of the electrolytic cell at each current density may include: obtaining the open circuit impedance value R of the electrolytic cell, which can be measured by connecting the positive and negative poles of the resistance tester to the anode and cathode of the electrolytic cell; determining the ohmic loss η of the electrolytic cell at each current density based on the open circuit impedance value R and each test current I. ohm , for example η ohm =IR, ohmic loss η ohm The unit of can be V (volt), and the unit of open circuit resistance value R can be Ω (ohm). The ohmic loss of the electrolytic cell at each current density can be Figure 2 As shown in Figure 2In the figure, the horizontal axis is the current density and the vertical axis is the ohmic loss.
[0062] In some embodiments of the present application, taking the example that the multiple voltage losses also include kinetic losses, obtaining the multiple voltage losses of the electrolytic cell at each current density may also include: obtaining polarization curve data when the electrolytic cell performs electrolysis, the polarization curve data including the electrode potential of the electrolytic cell at each current density, the polarization curve data, for example Figure 3 As shown in Figure 3 In the equation, the horizontal axis is the current density and the vertical axis is the electrode potential. The polarization curve data can be measured by connecting the positive and negative electrodes of the charge and discharge tester to the cathode and anode of the electrolytic cell at a preset test temperature. The ohmic loss of the electrolytic cell at each current density is used to correct the electrode potential of the electrolytic cell at that current density to eliminate the influence of the ohmic loss and obtain the corrected potential of the electrolytic cell at that current density. Based on the corrected potential of the electrolytic cell at each current density, the kinetic loss of the electrolytic cell at that current density is determined, thereby making the determined kinetic loss more accurate. The kinetic loss of the electrolytic cell at each current density is η kin For example Figure 4 As shown in Figure 4 In the figure, the horizontal axis is the current density and the vertical axis is the kinetic loss.
[0063] In some embodiments of the present application, determining the kinetic loss of the electrolytic cell at each current density based on the corrected potential of the electrolytic cell at the current density can include: fitting the current density and the corrected potential of the electrolytic cell at each current density to obtain a correlation between the current density and the corrected potential, thereby eliminating data errors through fitting; using the corrected potential associated with each current density in the correlation as the kinetic loss of the electrolytic cell at the current density, so that the determined kinetic loss is more consistent with the law of electrochemical reaction and more accurate.
[0064] In some embodiments of the present application, the electrode potential of the electrolytic cell at each current density is corrected by using the ohmic loss of the electrolytic cell at the current density, which may include: obtaining the equilibrium potential of the electrolytic cell at each current density; determining the overpotential of the electrolytic cell at the current density based on the equilibrium potential and the electrode potential of the electrolytic cell at each current density, for example, the difference between the electrode potential of the electrolytic cell at each current density and the equilibrium potential may be used as the overpotential of the electrolytic cell at the current density; using the ohmic loss of the electrolytic cell at each current density to correct the overpotential of the electrolytic cell at the current density, for example, the difference between the overpotential of the electrolytic cell at each current density and the ohmic loss may be used as the corrected potential of the electrolytic cell at the current density, so as to eliminate the influence of the equilibrium potential and the ohmic loss.
[0065] The equilibrium potential is the voltage difference between the electrodes when no external current is applied, reaching a state of thermodynamic equilibrium. In this state, the reactions at the anode and cathode are in dynamic equilibrium, with no net current flowing.
[0066] In some embodiments of the present application, the correlation between current density and corrected potential may include, for example, the Tafel formula:
[0067] η kin =a+blogi
[0068] Among them, η kin is the kinetic loss of the electrolytic cell, i is the current density, a is the intercept of the Tafel equation, and b is the slope of the Tafel equation. By fitting the current density and the corrected potential of the electrolytic cell at each current density, the values of the intercept a and slope b of the Tafel equation can be determined.
[0069] In some embodiments of the present application, the reason why the Tafel equation is included in the correlation between current density and corrected potential is explained. Specifically, in the BV (Bulter-Volmer) equation:
[0070] η=-((2.303RT) / (αF))logi0+((2.303RT) / (αF))logi
[0071] Where i0 is the exchange current density, unit is A / cm 2 , represents the current density when the current density of the forward and reverse reactions of the electrolytic cell is equal at the equilibrium potential; α is the transfer coefficient of the electrochemical reaction, dimensionless; F is the Faraday constant, for example, it can be 96485C / mol; η is the overpotential of the electrolytic cell, unit is V
[0072] (V), which is the difference between the electrode potential and the equilibrium potential; R is the gas constant, for example, it can be 8.314
[0073] J / (mol·K); T is the temperature of the reaction system, in K, and may be, for example, the test temperature described above.
[0074] It can be seen that the above-mentioned Tafel formula is actually equivalent to the BV equation, where the intercept a of the Tafel formula is actually equivalent to "-((2.303RT) / (αF))logi0" in the BV equation, and the slope b of the Tafel formula is actually equivalent to "(2.303RT) / (αF)" in the BV equation. Therefore, the Tafel formula is usually included in the correlation between current density and corrected potential obtained by fitting.
[0075] In some embodiments of the present application, taking the example that the multiple voltage losses also include mass transfer loss, obtaining the multiple voltage losses of the electrolytic cell at each current density may also include: obtaining the reversible electrolysis voltage of the electrolytic cell during electrolysis; using the electrode potential E of the electrolytic cell at each current density cell , ohmic loss, kinetic loss and reversible electrolysis voltage, determine the mass transfer loss of the electrolytic cell at the current density. For example, the electrode potential E of the electrolytic cell at each current density can be cell Subtract ohmic loss η ohm , dynamic loss η kin and the reversible electrolysis voltage E re As a result, the mass transfer loss η of the electrolytic cell at this current density is MT , that is, η MT =E cell -E re -η ohm -η kin The mass transfer loss η of the electrolytic cell at each current density MT For example Figure 5 As shown in Figure 5 In the figure, the horizontal axis is the current density and the vertical axis is the mass transfer loss.
[0076] The reversible electrolysis voltage refers to the minimum theoretical voltage required to drive a specific chemical reaction under ideal conditions without any energy loss (such as ohmic loss, etc.). Specifically, it is equal to the thermodynamic potential difference between the anode and cathode.
[0077] In some embodiments of the present application, the reversible electrolysis voltage can be calculated based on the test temperature of the electrolytic cell during the electrolysis process. For example, the reversible electrolysis voltage can be calculated using the following formula:
[0078] E re =1.5184-1.5421*10 -3 *T+9.523*10 -5 *T*lnT+9.84*10 -8 *T 2
[0079] Among them, E re is the reversible electrolysis voltage, the range is V (volt), T is the test temperature, the unit is K (Kelvin), and the test temperature can be 333.15K, for example.
[0080] 102. Compare multiple voltage losses to obtain voltage loss comparison results.
[0081] In the embodiments of the present application, since various voltage losses have different effects on the performance degradation of the electrolytic cell, the values of the various voltage losses are compared to obtain a voltage loss comparison result. The voltage loss comparison result may, for example, include the voltage loss that has the greatest impact on the performance degradation of the electrolytic cell, that is, the voltage loss with the largest value.
[0082] In some embodiments of the present application, comparing multiple voltage losses to obtain a voltage loss comparison result may include: determining a change curve of the multiple voltage losses relative to the current density when the electrolytic cell is undergoing electrolysis; determining the area ratio of the multiple voltage losses based on the area under the change curve, for example, the sum of the areas of the multiple voltage losses may be calculated, and the ratio between the area of each voltage loss and the sum of the areas is used as the area ratio of the voltage loss; and determining the voltage loss comparison result based on the size relationship between the area ratios of the multiple voltage losses. The voltage loss comparison result may, for example, include the voltage loss with the largest area ratio. It can be seen that the voltage loss with the largest area ratio is also the voltage loss that has the greatest impact on the performance degradation of the electrolytic cell.
[0083] In some embodiments of the present application, reference is made to Figure 6 , shows the area under the polarization curve when the electrolytic cell is electrolyzed, and the area under the polarization curve is divided into the ohmic loss η ohm The area under the curve of the change in current density during electrolysis in the electrolytic cell and the kinetic loss η kin The area under the curve of the change in current density during electrolysis in the electrolytic cell and the mass transfer loss η MT The area under the curve of the change in current density during electrolysis in the electrolytic cell and the reversible electrolysis voltage E re The area under the curve relative to the change in current density during electrolysis in an electrolytic cell.
[0084] from Figure 6It can be seen that among the various voltage losses, ohmic losses and mass transfer losses show a linear trend in the overall voltage change, accounting for a total of 30%, of which ohmic losses account for approximately 20% and mass transfer losses for approximately 10%. Kinetic losses, on the other hand, show a logarithmic growth, with the largest area accounting for approximately 70%, indicating high kinetic resistance and slow reaction rates during electrolysis. This may be due to poor electrode material performance, inappropriate electrolyte properties, poor electrode surface condition, exacerbated side reactions, or problems with electrolyzer design and operation. Therefore, kinetic losses can be considered the voltage loss with the greatest impact on electrolyzer performance degradation and can be included in voltage loss comparison results. By optimizing electrode materials, adjusting electrolyte properties, improving electrode surface condition, and optimizing electrolyzer design, kinetic, ohmic, and mass transfer losses can be effectively reduced, thereby improving the overall performance and electrolysis efficiency of the electrolyzer.
[0085] 103. Determine the cause of electrolytic cell failure based on the voltage loss comparison results.
[0086] In the embodiments of the present application, since different voltage losses have different effects on the components in the electrolytic cell, taking kinetic loss as an example, a larger kinetic loss indicates that the kinetic resistance of the electrode reaction is larger and the electrochemical reaction rate is slower, which may be caused by poor electrode material performance, inappropriate electrolyte properties, poor electrode surface condition, aggravated side reactions, or electrolytic cell design and operation problems. Therefore, the cause of failure of the electrolytic cell may include at least one of poor electrode material performance, inappropriate electrolyte properties, poor electrode surface condition, aggravated side reactions, or electrolytic cell design and operation problems.
[0087] In some embodiments of the present application, after determining the cause of electrolytic cell failure, the cause of failure can also be output, allowing relevant technical personnel to take corresponding improvement measures based on the cause of electrolytic cell failure. Improvement measures may include, for example, optimizing electrode materials, adjusting electrolyte properties, improving electrode surface conditions, and optimizing electrolytic cell design, thereby effectively reducing voltage loss and improving electrolytic cell performance and electrolysis efficiency.
[0088] It can be seen that in the above embodiments of the present application, by obtaining multiple voltage losses when the electrolytic cell is undergoing electrolysis treatment and comparing the multiple voltage losses, the failure analysis of the electrolytic cell is achieved. Since the multiple voltage losses are obtained in situ through the electrolytic cell, compared with the non-in situ characterization of the components in the electrolytic cell, the in situ failure analysis of the electrolytic cell can make the measured data more accurate, and the failure analysis results of the electrolytic cell are also more accurate.
[0089] In the above-mentioned embodiments of the present application, in-situ failure analysis can analyze the changes in the membrane electrode of the electrolyzer during use in the actual use conditions of the electrolyzer, and decouple the voltage loss of the electrolyzer. This means that there is no need to destroy the original structure of the electrolyzer, and the electrodes will not be disassembled / moved, reducing the impact of environmental factors. Through electrochemical monitoring, the key factors affecting the efficiency of the electrolyzer can be quickly identified, and the causes of the abnormalities of the membrane electrode can be preliminarily identified. In the subsequent disassembly analysis of the electrolyzer, there is a clearer analysis direction, thereby effectively optimizing the overall performance of the electrolyzer.
[0090] In a second aspect, based on the electrolytic cell failure analysis method of the above embodiment, embodiments of the present application provide an electrolytic cell failure analysis device, which is configured to perform the steps of any of the embodiments of the electrolytic cell failure analysis method. For example, the electrolytic cell failure analysis device may include:
[0091] An acquisition module, used for acquiring various voltage losses during electrolysis in the electrolytic cell;
[0092] A comparison module, used for comparing multiple voltage losses to obtain a voltage loss comparison result;
[0093] The determination module is used to determine the failure cause of the electrolytic cell based on the voltage loss comparison result.
[0094] In a third aspect, embodiments of the present application provide an electrolytic cell failure analysis device that integrates any of the electrolytic cell failure analysis devices provided in the embodiments of the present application. The electrolytic cell failure analysis device includes a processor and a memory, wherein the memory stores a computer program configured to be executed by the processor to implement the electrolytic cell failure analysis method described in any of the above embodiments, for example:
[0095] A plurality of voltage losses are obtained when the electrolytic cell is performing electrolysis treatment; the plurality of voltage losses are compared to obtain a voltage loss comparison result; and a failure cause of the electrolytic cell is determined based on the voltage loss comparison result.
[0096] In a fourth aspect, the embodiments of the present application provide a failure analysis device for an electrolytic cell, which integrates any of the failure analysis devices for an electrolytic cell provided in the embodiments of the present application. Figure 7 , which shows a schematic structural diagram of the failure analysis device of the electrolytic cell involved in the embodiment of the present application, specifically:
[0097] The electrolytic cell failure analysis device may include one or more processing core processors 701, one or more computer readable storage medium storage units 702, a power supply 703 and an input unit 704. Those skilled in the art will understand that Figure 7The structure of the electrolytic cell failure analysis device shown in the figure does not constitute a limitation on the electrolytic cell failure analysis device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.
[0098] Processor 701 serves as the control center for the electrolytic cell failure analysis device. It utilizes various interfaces and circuits to connect the various components of the entire electrolytic cell failure analysis device. By running or executing software programs and / or modules stored in storage unit 702 and accessing data stored in storage unit 702, it performs various functions of the electrolytic cell failure analysis device and processes data, thereby providing overall monitoring of the electrolytic cell failure analysis device. Optionally, processor 701 may include one or more processing cores. Preferably, processor 701 may integrate an application processor and a modem processor, wherein the application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 701.
[0099] The storage unit 702 can be used to store software programs and modules. The processor 701 executes various functional applications and data processing by running the software programs and modules stored in the storage unit 702. The storage unit 702 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, at least one application required for a function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created based on the use of the electrolytic cell failure analysis equipment, etc. In addition, the storage unit 702 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage device. Accordingly, the storage unit 702 may also include a memory controller to provide the processor 701 with access to the storage unit 702.
[0100] The electrolytic cell failure analysis device also includes a power supply 703 for supplying power to various components. Preferably, the power supply 703 can be logically connected to the processor 701 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The power supply 703 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.
[0101] The electrolytic cell failure analysis device may further include an input unit 704, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.
[0102] Although not shown, the electrolytic cell failure analysis device may further include a display unit, etc., which will not be described in detail here. Specifically, in the embodiment of the present application, the processor 701 in the electrolytic cell failure analysis device will load the executable files corresponding to one or more application processes into the storage unit 702 according to the following instructions, and the processor 701 will run the application stored in the storage unit 702 to implement various functions, such as:
[0103] A plurality of voltage losses are obtained when the electrolytic cell is performing electrolysis treatment; the plurality of voltage losses are compared to obtain a voltage loss comparison result; and a failure cause of the electrolytic cell is determined based on the voltage loss comparison result.
[0104] In a fifth aspect, embodiments of the present application provide a computer-readable storage medium, which may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. The computer-readable storage medium stores a computer program, which is configured to be executed by a processor to implement the electrolytic cell failure analysis method described in any one of the above items, for example:
[0105] A plurality of voltage losses are obtained when the electrolytic cell is performing electrolysis treatment; the plurality of voltage losses are compared to obtain a voltage loss comparison result; and a failure cause of the electrolytic cell is determined based on the voltage loss comparison result.
[0106] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program or instructions, which are executed by a processor to implement the failure analysis method of the electrolytic cell as described in any one of the above items, for example:
[0107] A plurality of voltage losses are obtained when the electrolytic cell is performing electrolysis treatment; the plurality of voltage losses are compared to obtain a voltage loss comparison result; and a failure cause of the electrolytic cell is determined based on the voltage loss comparison result.
[0108] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A failure analysis method for an electrolytic cell, characterized in that: The failure analysis method of the electrolytic cell comprises: Obtain various voltage losses during electrolysis in an electrolytic cell; Comparing the plurality of voltage losses to obtain a voltage loss comparison result; The failure cause of the electrolytic cell is determined based on the voltage loss comparison result.
2. The failure analysis method of the electrolytic cell according to claim 1, wherein: The method of obtaining various voltage losses during electrolysis in the electrolytic cell includes: Controlling the electrolytic cells to perform electrolysis treatment in sequence according to a plurality of preset test currents; Determining, based on the test current, a current density when the electrolytic cell performs electrolysis treatment; A plurality of the voltage losses of the electrolytic cell at each of the current densities are obtained.
3. The failure analysis method of the electrolytic cell according to claim 2, wherein: The multiple voltage losses include ohmic losses, and obtaining the multiple voltage losses of the electrolytic cell at each current density includes: Obtaining an open circuit impedance value of the electrolytic cell; The ohmic loss of the electrolytic cell at each current density is determined based on the open circuit impedance value and each test current.
4. The failure analysis method of the electrolytic cell according to claim 3, wherein: The multiple voltage losses also include kinetic losses, and obtaining the multiple voltage losses of the electrolytic cell at each current density further includes: Obtaining polarization curve data when the electrolytic cell performs electrolysis, wherein the polarization curve data includes an electrode potential of the electrolytic cell at each current density; Using the ohmic loss of the electrolytic cell at each current density, correcting the electrode potential of the electrolytic cell at the current density to obtain a corrected potential of the electrolytic cell at the current density; The kinetic loss of the electrolytic cell at each of the current densities is determined based on the corrected potential of the electrolytic cell at the current density.
5. The failure analysis method of the electrolytic cell according to claim 4, characterized in that: Determining the kinetic loss of the electrolytic cell at each current density based on the corrected potential of the electrolytic cell at each current density comprises: performing fitting processing on the current density and the corrected potential of the electrolytic cell at each current density to obtain a correlation between the current density and the corrected potential; The corrected potential associated with each current density in the correlation is used as the kinetic loss of the electrolytic cell at the current density.
6. The failure analysis method of the electrolytic cell according to claim 4, wherein: The method of using the ohmic loss of the electrolytic cell at each current density to correct the electrode potential of the electrolytic cell at the current density includes: Obtaining the equilibrium potential of the electrolytic cell at each current density; determining the overpotential of the electrolytic cell at the current density based on the equilibrium potential and the electrode potential of the electrolytic cell at each current density; The ohmic loss of the electrolytic cell at each current density is used to correct the overpotential of the electrolytic cell at the current density.
7. The failure analysis method of an electrolytic cell according to claim 4, wherein: The multiple voltage losses also include mass transfer losses, and obtaining the multiple voltage losses of the electrolytic cell at each current density further includes: Obtaining a reversible electrolysis voltage when the electrolytic cell performs electrolysis treatment; The mass transfer loss of the electrolytic cell at each current density is determined using the electrode potential of the electrolytic cell at each current density, the ohmic loss, the kinetic loss, and the reversible electrolysis voltage.
8. The failure analysis method for an electrolytic cell according to any one of claims 1 to 7, wherein: The comparing the multiple voltage losses to obtain a voltage loss comparison result includes: determining a plurality of curves of the voltage loss relative to the current density during electrolysis in the electrolytic cell; determining area proportions of the various voltage losses based on the areas under the change curves; The voltage loss comparison result is determined based on a size relationship between the area proportions of the multiple voltage losses.
9. A failure analysis device for an electrolytic cell, characterized in that: The failure analysis device for an electrolytic cell includes a processor and a memory, wherein a computer program is stored in the memory, and the computer program is configured to be executed by the processor to implement the failure analysis method for an electrolytic cell according to any one of claims 1 to 8.
10. A computer storage medium, characterized in that The computer storage medium stores a computer program, and the computer program is configured to be executed by a processor to implement the failure analysis method of the electrolytic cell according to any one of claims 1 to 8.