Electrolytic cell insulation detection apparatus

Abstract

An electrolytic cell insulation detection apparatus, comprising: an insulation detection module (10), which comprises a first end (P1) and a second end (P2), wherein the first end (P1) is configured to be connected to an electrode plate (130) of an electrolytic cell, the second end (P2) is configured to be connected to a tie rod (140) of the electrolytic cell, and the insulation detection module (10) is configured to collect an impedance signal of the electrolytic cell during operation; and a control unit (190), which is electrically connected to the insulation detection module (10), and is configured to perform insulation detection on the basis of the received impedance signal.

Description

Electrolytic cell insulation testing device

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 2024119487094, filed on December 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of new energy hydrogen production, and more specifically, to an insulation detection device for an electrolyzer. Background Technology

[0004] Hydrogen production from new energy sources is becoming increasingly widespread as a key pathway to achieving dual-carbon goals. Consequently, the operational safety of electrolyzers has become a pressing issue for their large-scale application. In related technologies, malfunctions during electrolyzer operation cannot be detected in a timely manner, impacting operational safety. Summary of the Invention

[0005] This disclosure aims to at least address one of the technical problems existing in the prior art. To this end, this disclosure proposes an electrolyzer insulation detection device, an electrolyzer, a control method, and a hydrogen production device, which can perform detection during the operation of the electrolyzer, facilitating fault detection, effectively ensuring the safety of electrolyzer operation, and extending the service life of the electrolyzer.

[0006] In a first aspect, this disclosure provides an electrolytic cell insulation testing device, the device comprising:

[0007] An insulation detection module includes a first end and a second end, the first end being configured to connect to an electrode plate of an electrolytic cell, and the second end being configured to connect to a pull rod of the electrolytic cell; the insulation detection module is configured to collect the impedance signal of the electrolytic cell;

[0008] The control unit, electrically connected to the insulation detection module, is configured to perform insulation detection based on the received impedance signal.

[0009] According to the electrolytic cell insulation detection device disclosed herein, by providing an insulation detection module configured to be connected to the electrode plate and the tie rod of the electrolytic cell, the insulation failure between the electrode plate and the tie rod can be detected during the operation of the electrolytic cell, which facilitates fault detection, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0010] According to one embodiment of this disclosure, the insulation detection module further includes a third terminal and a fourth terminal, the third terminal being configured to be connected to the end plate of the electrolytic cell, and the fourth terminal being configured to be connected to ground; the insulation detection module is further configured to collect the leakage current signal of the electrolytic cell; the control unit is further configured to perform insulation detection based on the received leakage current signal.

[0011] According to the electrolytic cell insulation detection device disclosed herein, by providing an insulation detection module configured to be connected between the end pressure plate and ground, the insulation failure between the end pressure plate and the end electrode plate, as well as between the electrode plates, can be effectively detected. The operation is simple and easy to implement; moreover, it can be detected during the operation of the electrolytic cell, which facilitates fault detection, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0012] According to one embodiment of this disclosure, the insulation detection module includes an insulation impedance sampling module and a leakage current sampling module. The insulation impedance sampling module includes a first terminal and a second terminal, and the leakage current sampling module includes a third terminal and a fourth terminal.

[0013] According to the electrolytic cell insulation detection device disclosed herein, by integrating a leakage current sampling module configured to detect leakage current between the end plate and ground and an insulation impedance sampling module configured to detect the impedance value between the plate and the tie rod, the insulation failure between the end pressure plate and the end plate, as well as between the plate and the tie rod, can be effectively detected. The device is simple to operate and easy to implement. Furthermore, it can be used to detect during the operation of the electrolytic cell, making it easier to identify faults, effectively ensuring the safety of the electrolytic cell operation, and extending the service life of the electrolytic cell.

[0014] According to one embodiment of this disclosure, the insulation impedance sampling module includes an unbalanced bridge circuit.

[0015] According to one embodiment of the present disclosure, at least one insulation impedance sampling module is provided, and the second end of each insulation impedance sampling module is respectively configured to connect to different pull rods on the electrolytic cell;

[0016] or,

[0017] At least one leakage current sampling module is provided, and the first end of each leakage current sampling module is configured to connect to different end plates on the electrolytic cell.

[0018] According to one embodiment of this disclosure, it further includes: a first switching unit, the first switching unit including a first common terminal and a plurality of first sub-terminals that can be selectively connected to the first common terminal;

[0019] The first common terminal is connected to the first terminal, and multiple first sub-terminals are configured to be connected to different pull rods on the electrolytic cell, respectively.

[0020] Secondly, this disclosure provides an electrolytic cell comprising:

[0021] End pressure plate;

[0022] Electrode plates;

[0023] A pull rod, wherein the pull rod is insulated from the electrode plate and the end pressure plate;

[0024] And the electrolytic cell insulation testing device as described in the first aspect;

[0025] The electrolytic cell is connected to the electrolytic cell insulation detection device.

[0026] According to the electrolytic cell disclosed herein, by setting an insulation detection module configured to connect the electrode plate and the tie rod of the electrolytic cell, the insulation failure between the electrode plate and the tie rod can be detected during the operation of the electrolytic cell, which facilitates fault detection, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0027] Thirdly, this disclosure provides a control method, the method comprising:

[0028] Acquire the sampling signal collected by the insulation detection module, the sampling signal including the impedance signal;

[0029] If the electrode insulation of the electrolytic cell fails based on the sampled signal, the electrolytic cell is shut down.

[0030] Fourthly, this disclosure provides a hydrogen production apparatus, which includes:

[0031] The electrolytic cell as described in the second aspect;

[0032] Hydrogen production power source;

[0033] A gas-liquid separation and purification device, wherein the electrolyzer is connected between the hydrogen production power source and the gas-liquid separation and purification device;

[0034] The control unit in the electrolytic cell insulation detection device is electrically connected to the hydrogen production power supply and the gas-liquid separation and purification device, respectively.

[0035] Fifthly, this disclosure provides a method for detecting the insulation of an electrolytic cell, the method comprising:

[0036] Acquire at least one of the following: the leakage current signal from the end plate of the electrolytic cell to ground and the impedance signal between the electrode plate and the pull rod of the electrolytic cell;

[0037] Insulation detection is performed on the electrolytic cell based on at least one of the leakage current signal and the impedance signal. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 is one of the structural schematic diagrams of the electrolytic cell insulation detection device provided in an embodiment of this disclosure;

[0040] Figure 2 is a second structural schematic diagram of the electrolytic cell insulation detection device provided in an embodiment of this disclosure;

[0041] Figure 3 is a third structural schematic diagram of the electrolytic cell insulation detection device provided in the embodiments of this disclosure;

[0042] Figure 4 is a fourth structural schematic diagram of the electrolytic cell insulation detection device provided in the embodiments of this disclosure;

[0043] Figure 5 is a fifth structural schematic diagram of the electrolytic cell insulation detection device provided in the embodiments of this disclosure;

[0044] Figure 6 is a schematic diagram of the structure of the electrolytic cell insulation detection device provided in the embodiment of this disclosure;

[0045] Figure 7 is a structural schematic diagram of the electrolytic cell insulation detection device provided in the embodiment of this disclosure;

[0046] Figure 8 is a schematic diagram of the structure of the electrolytic cell insulation detection device provided in the embodiment of this disclosure;

[0047] Figure 9 is a schematic diagram of the hydrogen production apparatus provided in an embodiment of this disclosure;

[0048] Figure 10 is one of the flowcharts illustrating the control method of the electrolytic cell insulation detection device provided in this embodiment of the present disclosure;

[0049] Figure 11 is a schematic flowchart of the insulation detection method for an electrolytic cell provided in an embodiment of this disclosure;

[0050] Figure 12 is a second schematic flowchart of the control method of the electrolytic cell insulation detection device provided in the embodiments of this disclosure;

[0051] Figure 13 is a schematic diagram of the structure of the control device of the electrolytic cell insulation detection device provided in an embodiment of this disclosure;

[0052] Figure 14 is a schematic diagram of the structure of the insulation detection device for an electrolytic cell provided in an embodiment of this disclosure;

[0053] Figure 15 is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0054] The technical solutions of the embodiments of this disclosure will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure are within the scope of protection of this disclosure.

[0055] The terms "first," "second," etc., used in this disclosure and in the claims are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this disclosure can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0056] The following description, in conjunction with the accompanying drawings, details the electrolytic cell insulation detection device, electrolytic cell, control method for electrolytic cell insulation detection device, hydrogen production device, insulation detection method for electrolytic cell, control device, electronic device, and readable storage medium provided in this disclosure through specific embodiments and application scenarios.

[0057] This disclosure provides an electrolytic cell insulation testing device.

[0058] As shown in Figure 1, the electrolytic cell insulation detection device includes: insulation detection module 10 and control unit 190.

[0059] In this embodiment, the electrolytic cell can be an alkaline electrolytic cell, a PEM electrolytic cell, or other types of electrolytic cells; the electrolytic cell includes an end plate 110, an electrode plate 130, a series-connected chamber, and a pull rod 140, etc., wherein the end plate 110 may include a left end plate and a right end plate; the electrode plate 130 may include a left end plate and a right end plate.

[0060] In some embodiments, the electrode plate 130 may further include an intermediate electrode plate; in some embodiments, the electrolytic cell may further include an insulating plate 120, which is disposed between the end electrode plate and the end pressure plate 110 to insulate and isolate the end electrode plate and the end pressure plate 110; in some embodiments, the end electrode plate and the end pressure plate 110 are directly connected without the insulating plate 120 for insulation and isolation.

[0061] Pull rods 140 are disposed around the electrolytic cell and perpendicular to the plane of the end pressure plate 110. An electrolytic cell includes multiple pull rods 140, such as 10, 11 or more.

[0062] Multiple small chambers are connected in series between the left and right end plates. In actual operation, the electrolyte enters the small chambers from the end plates, and the gas produced by electrolysis can be released from the end plates or the intermediate plates.

[0063] The insulation detection module 10 is a module configured to detect whether the electrode plate has insulation failure.

[0064] Referring again to Figure 1, the insulation detection module 10 may include: a first end P1 and a second end P2. The first end P1 is configured to connect to the electrode plate 130 of the electrolytic cell, wherein the electrode plate 130 can be an end electrode plate or an intermediate electrode plate. The second end P2 is configured to connect to the pull rod 140 of the electrolytic cell; the insulation detection module 10 is configured to collect the impedance signal of the electrolytic cell.

[0065] In actual operation, impedance signals can be collected at certain time intervals during the operation of the electrolytic cell.

[0066] Referring again to Figure 1, in some embodiments, the insulation detection module 10 may include an insulation impedance sampling module 160; a first terminal P1 and a second terminal P2 are disposed in the insulation impedance sampling module 160, and the insulation impedance sampling module 160 collects the impedance signal of the electrolytic cell.

[0067] The control unit 190 is electrically connected to the insulation detection module 10 and is configured to perform insulation detection based on the received impedance signal.

[0068] Understandably, during the operation of the electrolytic cell, under normal operating conditions, the pull rod 140 is insulated from the electrode plate 130 and the end pressure plate 110. If the insulation between the pull rod 140 and the electrode plate 130 fails, and electrolyte leaks into the pull rod 140, it could even cause multiple chambers to short-circuit through the pull rod 140. In this case, the impedance between the pull rod 140 and the electrode plate 130 will decrease significantly or even become zero. The insulation detection module 10 can detect the impedance between the pull rod 140 and the electrode plate 130 in real time. If a significant decrease in impedance is detected, it can be approximately considered that the insulation between the pull rod 140 and the electrode plate 130 has failed.

[0069] In some embodiments, the electrical connection may include a communication connection and a wired electrical connection.

[0070] According to the embodiments of this disclosure, the electrolytic cell insulation detection device provides an insulation detection module configured to connect to the electrode plate and the tie rod of the electrolytic cell. This module can detect insulation failure between the electrode plate and the tie rod during the operation of the electrolytic cell, making it easier to detect faults, effectively ensuring the safety of the electrolytic cell operation, and extending the service life of the electrolytic cell.

[0071] Referring again to Figure 1, in some embodiments, the insulation detection module 10 may further include a third terminal P3 and a fourth terminal P4.

[0072] In this embodiment, the third terminal P3 is configured to connect to the end plate of the electrolytic cell, wherein the end plate 110 may be a left and right end plate or a single end plate. The fourth terminal P4 is configured to connect to ground; the insulation detection module 10 is also configured to collect leakage current signals of the electrolytic cell during operation; the control unit 190 is also configured to perform insulation detection based on the received leakage current signals.

[0073] It is understandable that during the operation of the electrolytic cell, under normal operating conditions, the end pressure plate 110 is insulated from the end electrode plate, and the pull rod 140 is insulated from the electrode plate 130 and the end pressure plate 110.

[0074] In the event of insulation failure between the end pressure plate 110 and the end plate, the electrolytic cell will have current flowing through the ground via the terminal voltage, resulting in leakage current. The insulation detection module 10 can detect the presence and magnitude of leakage current in real time. If leakage current is detected or is large, it can be approximately assumed that the insulation between the end pressure plate 110 and the end plate has failed. In the event of insulation failure, it can seriously lead to arcing and burning of the electrolytic cell, causing safety problems.

[0075] Referring again to Figure 1, in some embodiments, the insulation detection module 10 may further include a leakage current sampling module 150, with the third terminal P3 and the fourth terminal P4 disposed in the leakage current sampling module 150, which collects the leakage current signal of the electrolytic cell during operation.

[0076] The leakage current sampling module 150 can be a current sensor, or other types of sensors that can convert the sampling signal into a leakage current signal.

[0077] According to the embodiments of this disclosure, the electrolytic cell insulation detection device can effectively detect insulation failure between the end plate and the end plate, as well as between the plates, by providing an insulation detection module configured to be connected between the end plate and the ground. The device is simple to operate and easy to implement. Moreover, it can perform detection during the operation of the electrolytic cell, which facilitates fault detection, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0078] Referring again to FIG1, in some embodiments, the insulation detection module 10 may include an insulation impedance sampling module 160 and a leakage current sampling module 150.

[0079] In this embodiment, the insulation impedance sampling module includes a first terminal P1 and a second terminal P2, and the leakage current sampling module includes a third terminal P3 and a fourth terminal P4.

[0080] The control unit 190 is electrically connected to the leakage current sampling module 150 and the insulation impedance sampling module 160, respectively, and is configured to perform insulation detection based on the received leakage current signal and / or impedance signal.

[0081] According to the electrolytic cell insulation detection device provided in this embodiment, by integrating a leakage current sampling module configured to detect leakage current between the end plate and ground and an insulation impedance sampling module configured to detect the impedance value between the plate and the tie rod, the insulation failure between the end pressure plate and the end plate, as well as between the plate and the tie rod, can be effectively detected. The device is simple to operate and easy to implement. Moreover, it can be used to detect during the operation of the electrolytic cell, which facilitates fault detection, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0082] In some embodiments, the insulation impedance sampling module 160 includes an unbalanced bridge circuit.

[0083] In some embodiments, the unbalanced bridge circuit includes a Y-type unbalanced bridge circuit.

[0084] In this embodiment, Figure 5 illustrates the circuit structure of a Y-type unbalanced bridge circuit. The Y-type unbalanced bridge circuit includes a first resistor R1 and a second resistor R2 connected in series. The first resistor R1 is configured to be connected to the pull rod 140, and the second resistor R2 is configured to be connected to the electrode plate 130.

[0085] One end of the third resistor R3 is connected between the first resistor R1 and the second resistor R2, and the other end is grounded.

[0086] The second resistor R2 is connected in parallel with the first switch S1.

[0087] Of course, in other embodiments, other types of unbalanced bridge circuits or balanced bridge circuits may also be used, and this disclosure does not limit them.

[0088] In some embodiments, at least one insulation impedance sampling module 160 is provided.

[0089] In this embodiment, the second end P2 of each insulation impedance sampling module 160 is configured to connect to different pull rods 140 on the electrolytic cell.

[0090] In some embodiments, multiple insulation impedance sampling modules 160 are provided, and the multiple insulation impedance sampling modules 160 are configured to correspond one-to-one with the multiple pull rods 140 corresponding to the electrolytic cell, that is, multiple second ends P2 are configured to be connected one-to-one with the multiple pull rods 140.

[0091] In this embodiment, an insulation impedance sampling module 160 can be provided for each pull rod 140, which is configured to collect the impedance value between the pull rod 140 and the electrode plate 130. The setting method of each insulation impedance sampling module 160 is similar. The insulation impedance sampling module 160 can be a Y-type unbalanced bridge circuit, or it can be other types of unbalanced bridge circuits. This disclosure does not limit it.

[0092] According to the electrolytic cell insulation detection device provided in this embodiment, multiple insulation impedance sampling modules 160 are set up to perform insulation failure detection on each tie rod 140 in a one-to-one correspondence. This enables the faulty tie rod 140 to be located quickly and accurately during operation, improving detection accuracy and real-time performance, thereby enhancing the safety of the electrolytic cell.

[0093] In some embodiments, the electrolytic cell insulation detection device may further include: a first switching unit 170;

[0094] In this embodiment, one electrolytic cell can correspond to one insulation impedance sampling module 160, and the first switching unit 170 is configured to switch the pull rod 140 connected to the insulation impedance sampling module 160.

[0095] The first switching unit includes a first common terminal and multiple first sub-terminals that can be selectively connected to the first common terminal; the first common terminal is connected to the first terminal P1, and the multiple first sub-terminals are configured to be connected to different pull rods 140 on the electrolytic cell respectively.

[0096] As shown in Figure 6, the first switching unit 170 includes a first common terminal and multiple first sub-terminals. A first sub-switch is provided between the first common terminal and each first sub-terminal: S1-1, S1-2, ..., S1-n, where n is a positive integer. The first common terminal is configured to be connected to the electrode plate 130 of the electrolytic cell through the first terminal P1. The multiple first sub-terminals are configured to be connected to multiple pull rods 140 corresponding to the electrolytic cell through the second terminal P2. By controlling the first sub-switch between the first common terminal and the first sub-terminals, the first common terminal can be selectively connected to any sub-interface among the multiple first sub-terminals, thereby performing insulation detection on the pull rod 140 corresponding to the sub-interface.

[0097] For example, when control S1-1 is closed and control S1-2 to S1-n are all open, the insulation impedance sampling module 160 is connected between the pull rod 140 and the electrode plate 130 and is configured to collect the impedance value between the pull rod 140 and the electrode plate 130 to detect whether the insulation between the pull rod 140 and the electrode plate 130 has failed.

[0098] In actual operation, the insulation impedance between the pull rod and the electrode plate can be tested periodically by the first switching unit 170. By adjusting the opening and closing state of each sub-switch, the pull rod 140 connected to the insulation impedance sampling module 160 can be flexibly adjusted, thereby detecting the insulation failure between the corresponding pull rod 140 and the electrode plate 130.

[0099] According to the electrolytic cell insulation detection device provided in this embodiment, the first switching unit 170 is set to switch the pull rod 140 connected to the insulation impedance sampling module 160. Only one insulation impedance sampling module 160 is needed to detect the insulation failure between each pull rod 140 and the electrode plate 130 of the electrolytic cell, and quickly locate the faulty pull rod 140. It has high flexibility and detection accuracy, further improves the safety of the electrolytic cell, and has low installation cost and small space occupation.

[0100] In some embodiments, electrode plates can be connected in series between the various pull rods 140 in the same electrolytic cell, and the insulation impedance sampling module 160 is configured to be located between any pull rod 140 and the electrode plate 130. If the impedance signal collected by the insulation impedance sampling module 160 is small, it is considered that an insulation failure has occurred between the pull rod 140 and the electrode plate 130.

[0101] In some embodiments, at least one leakage current sampling module 150 is provided.

[0102] In this embodiment, the third terminal P3 of each leakage current sampling module 150 is configured to connect to different end plates on the electrolytic cell.

[0103] In some embodiments, the third terminal P3 of the leakage current sampling module 150 is configured to be connected to an end plate 110 with an insulating plate 120 disposed between it and the electrode plate 130.

[0104] In some embodiments, the third terminal P3 of the leakage current sampling module 150 may be selectively connected to the end plate 110 depending on the type of electrolytic cell.

[0105] Electrolytic cells can be categorized in several ways, including but not limited to: a structure with one positive and one negative electrode and gas exiting from the middle electrode, a structure with one positive and one negative electrode and gas entering from one end and exiting from the other, and a structure with one positive electrode and two negative electrodes.

[0106] Figure 2 illustrates a schematic diagram of an electrolytic cell with one positive and one negative electrode and gas outlet in the middle electrode. Figure 3 illustrates a schematic diagram of an electrolytic cell with one positive and one negative electrode and end-in and end-out structure. Figure 4 illustrates a schematic diagram of an electrolytic cell with one positive and two negative electrodes.

[0107] Depending on the category, the number of leakage current sampling modules 150 and the type of corresponding terminal plates 110 may vary. In application, they should be flexibly set according to the actual situation. The third terminal P3 of the leakage current sampling module 150 is configured to be connected to the terminal plate 110 to save on setup costs.

[0108] According to the electrolytic cell insulation detection device provided in this embodiment, the third end of the leakage current sampling module 150 is configured to be connected to the end plate 110 according to the type of electrolytic cell. It can collect the leakage current that may be generated by different types of electrolytic cells during operation. It is applicable to multiple types, has universality and setting flexibility, and helps to improve sampling accuracy, thereby improving the accuracy of insulation failure detection results.

[0109] In some embodiments, when the structure is a positive and negative electrode with gas outlet in the middle, the leakage current sampling module 150 is respectively disposed between the left end pressure plate of the electrolytic cell and ground, and between the right end pressure plate of the electrolytic cell and ground.

[0110] In this embodiment, Figure 2 illustrates an electrolytic cell with a positive and negative electrode and a gas outlet in the middle electrode. The electrolytic cell includes a left electrode plate, a right electrode plate and a middle electrode plate. The end plate 110 is insulated from the end plate by an insulating plate 120. The pull rod 140 is insulated from the electrode plate 130 and the end plate 110. The electrolytic cell is grounded through the left and right end plates and the middle electrode plate. During the electrolysis process, gas is released through the middle electrode plate.

[0111] During the operation of the electrolytic cell, insulation failure may occur in the end plate 110 corresponding to the positive electrode, or in the end plate 110 corresponding to the negative electrode, or in both the end plate 110 corresponding to the positive electrode and the end plate 110 corresponding to the negative electrode.

[0112] For this type of electrolytic cell, two leakage current sampling modules 150 can be set up, namely two third terminals P3 and two fourth terminals P4. One third terminal P3 is configured to be connected to the left end platen, and the fourth terminal P4 is configured to be grounded to collect the leakage current between the left end platen and ground and determine whether the left end platen has failed insulation. The other third terminal P3 is configured to be connected to the right end platen, and the fourth terminal P4 is configured to be grounded to collect the leakage current between the right end platen and ground and determine whether the right end platen has failed insulation.

[0113] According to the electrolytic cell insulation detection device provided in the embodiments of this disclosure, for an electrolytic cell with one positive and one negative electrode and a gas outlet in the middle electrode, leakage current sampling modules 150 are respectively set between the left and right end pressure plates and the ground. The leakage current sampling modules 150 can independently detect the insulation failure between the two end pressure plates 110 and the end electrode plates during operation, and can quickly and accurately locate the failure location. It has high detection accuracy and further improves safety.

[0114] In some embodiments, when the type is a positive and negative structure with one end in and one end out, the leakage current sampling module 150 is disposed between the terminal plate 110 corresponding to the positive terminal and ground.

[0115] In this embodiment, Figure 3 illustrates an electrolytic cell with a positive and negative electrode and an end-in-end-out structure. The electrolytic cell includes a left end plate and a right end plate. The end plate 110 corresponding to the positive electrode is insulated from the end plate corresponding to the positive electrode by an insulating plate 120. The end plate 110 corresponding to the negative electrode is directly connected to the end plate corresponding to the negative electrode without the insulating plate 120 for isolation. The pull rod 140 is insulated from the electrode plate 130 and the end plate 110. The electrolyte enters the electrolytic cell from the end plate 110 corresponding to the negative electrode and exits from the end plate 110 corresponding to the negative electrode.

[0116] Referring to Figure 3, taking the right-side pressure plate as the negative terminal corresponding to the end plate 110 as an example, for this type of electrolytic cell, since the negative terminal corresponding to the end plate 110 is already grounded, no leakage current will be generated during operation. When setting the leakage current sampling module 150, the third terminal P3 only needs to be configured to be connected to the positive terminal corresponding to the end plate 110, and the fourth terminal P4 is configured to be grounded (such as setting the leakage current sampling module 150 between the left-side pressure plate and the ground). The leakage current between the positive terminal corresponding to the end plate 110 and the ground is collected to determine whether the corresponding end plate 110 has failed to isolate.

[0117] According to the electrolytic cell insulation detection device provided in this embodiment, for an electrolytic cell with a positive and negative electrode and an end-in and end-out structure, a leakage current sampling module 150 is set between the end plate 110 corresponding to the positive electrode and the ground. Based on effectively detecting the insulation failure between the end plate 110 corresponding to the positive electrode and the electrode plate 130, the device can save on the setup cost.

[0118] In some embodiments, in the case of an electrolytic cell with a one-positive-two-negative structure, the leakage current sampling module 150 may not be provided.

[0119] As shown in Figure 7, in some embodiments, the electrolytic cell insulation detection device may further include a second switching unit 180.

[0120] In this embodiment, the second switching unit 180 is configured to switch the electrolytic cell connected to the electrolytic cell insulation detection device.

[0121] As shown in Figure 8, the second switching unit 180 includes a second common terminal and multiple second sub-terminals that can be selectively connected to the second common terminal. The second common terminal is connected to the insulation detection module 10, and the multiple second sub-terminals are configured to connect to different electrolytic cells respectively.

[0122] A second sub-switch is provided between the second common terminal and each second sub-terminal, such as: S2-1, S2-2, ..., S2-n, where n is a positive integer.

[0123] In actual operation, a second switching unit 180 can be set at the first end P1, the second end P2, and the third end P3 of the electrolytic cell insulation detection device. For each second switching unit 180, for example, control S2-1 is closed, and control S2-2 to S2-n are all open. At this time, the electrolytic cell insulation detection device is connected to the electrolytic cell 1. The third end P3 of the leakage current sampling module 150 is configured to be connected to the end pressure plate 110 of the electrolytic cell 1. The first end P1 of the insulation impedance sampling module 160 is configured to be connected to the electrode plate 130 of the electrolytic cell 1, and the second end P2 is configured to be connected to the pull rod 140 of the electrolytic cell 1, so as to perform insulation failure detection on the electrolytic cell 1.

[0124] Of course, in other embodiments, multiple electrolytic cell insulation detection devices can also be set up, with each electrolytic cell corresponding to one another, so as to perform independent detection and improve the stability of the detection.

[0125] According to the electrolytic cell insulation detection device provided in the embodiments of this disclosure, the electrolytic cell connected to the electrolytic cell insulation detection device is switched by setting a second switching unit 180. Only one electrolytic cell insulation detection device is needed to detect the insulation failure of each electrolytic cell, quickly locate the faulty electrolytic cell, and has high flexibility and detection accuracy, further improving the safety of the electrolytic cell. Moreover, the setup cost is low and the space occupied is small.

[0126] Of course, in other embodiments, each electrolytic cell can be independently equipped with an electrolytic cell insulation detection device, and the insulation detection devices of each electrolytic cell can work independently and complement each other to improve the stability of the entire detection system.

[0127] This disclosure also provides an electrolytic cell.

[0128] As shown in Figure 1, the electrolytic cell includes: an end pressure plate 110, an electrode plate 130, a pull rod 140, and an electrolytic cell insulation detection device as described in any of the above embodiments; the electrolytic cell is connected to the electrolytic cell insulation detection device, and the specific connection method has been described in the above embodiments, and will not be repeated here.

[0129] The pull rod 140 is insulated from the electrode plate 130 and the end pressure plate 110.

[0130] According to the electrolytic cell provided in this disclosure, by setting an insulation detection module configured to connect the electrode plate and the pull rod of the electrolytic cell, the insulation failure between the electrode plate and the pull rod can be detected during the operation of the electrolytic cell, which facilitates fault detection, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0131] In some embodiments, when the insulation detection module 10 further includes a third terminal P3 and a fourth terminal P4, the third terminal P3 is connected to the end plate, and the fourth terminal P4 is grounded.

[0132] According to the electrolytic cell provided in this embodiment, by setting an insulation detection module 10 configured to connect the end pressure plate 110 and the ground, the insulation failure between the end pressure plate 110 and the end electrode plate and the electrode plate 130 can be effectively detected. The operation is simple and easy to implement; and the detection can be carried out during the operation of the electrolytic cell, which facilitates the discovery of faults, effectively ensures the safety of the operation of the electrolytic cell, and extends the service life of the electrolytic cell.

[0133] In some embodiments, the insulation detection module 10 may include an insulation impedance sampling module 160 and a leakage current sampling module 150. The insulation impedance sampling module 160 includes a first terminal P1 and a second terminal P2, and the leakage current sampling module 150 includes a third terminal P3 and a fourth terminal P4.

[0134] According to the electrolytic cell provided in this embodiment, by integrating a leakage current sampling module 150 configured to detect leakage current between the end plate and ground and an insulation impedance sampling module 160 configured to detect the impedance value between the plate 130 and the pull rod 140, the insulation failure between the end plate 110 and the end plate, and between the plate 130 and the pull rod 140 can be effectively detected. The operation is simple and easy to implement; and the detection can be carried out during the operation of the electrolytic cell, which facilitates the discovery of faults, effectively ensures the safety of the electrolytic cell operation, and extends the service life of the electrolytic cell.

[0135] This disclosure also provides a control method.

[0136] As shown in Figure 10, the control method includes steps 1010 and 1020.

[0137] Step 1010: Acquire the sampling signal collected by the insulation detection module 10;

[0138] In this step, the sampled signal is the actual signal acquired at different acquisition times.

[0139] The sampled signal may include an impedance signal.

[0140] In actual implementation, an electrolytic cell insulation detection device as described in any of the above embodiments can be set up. The electrolytic cell insulation detection device includes an insulation detection module 10, which includes an insulation impedance sampling module 160 for collecting the impedance signal of the electrolytic cell. The specific connection method is as described above and will not be repeated here.

[0141] The impedance signal is the impedance value between the pull rod 140 and the electrode 130 connected to the insulation impedance sampling module 160. Under normal circumstances, the impedance signal is a large value; in the event of insulation failure, the impedance signal is small, or even zero.

[0142] During the operation of the electrolytic cell, impedance signals can be collected at certain time intervals.

[0143] Step 1020: If the electrode insulation of the electrolytic cell is determined to be in failure based on the sampling signal, control the electrolytic cell to shut down.

[0144] In this step, if an impedance signal that is too low is detected, it is considered that the insulation of the electrode plate 130 of the electrolytic cell has failed, and the electrolytic cell can be controlled to stop working and be shut down for maintenance.

[0145] According to the control method of the electrolytic cell provided in the embodiments of this disclosure, by setting the insulation detection module 10, the impedance value between the electrode plate 130 and the pull rod 140 can be collected and detected during the operation of the electrolytic cell, so as to respond quickly in the event of insulation failure, control the electrolytic cell to stop, and ensure the safe operation of the electrolytic cell throughout the entire working cycle.

[0146] As shown in Figure 12, in some embodiments, when the insulation detection module 10 further includes a third terminal P3 and a fourth terminal P4, the sampling signal also includes a leakage current signal; determining the electrode insulation failure of the electrolytic cell based on the sampling signal may include:

[0147] If the leakage current signal is not less than the first current threshold, it is determined that the insulation between the electrode plate and the terminal plate has failed.

[0148] In this embodiment, the insulation detection module 10 may further include a leakage current sampling module 150 for collecting leakage current signals; the leakage current signal is the current generated when the terminal pressure plate 110 connected to the leakage current sampling module 150 and the terminal plate fail to maintain insulation; it is understood that under normal circumstances, the leakage current signal is a small value, or even 0; when insulation failure occurs, the leakage current signal is larger.

[0149] The first current threshold I1 can be user-defined or obtained from experimental tests or historical data statistics. The first current threshold I1 is the maximum leakage current between the terminal plate 110 and ground under normal operating conditions.

[0150] For example, the first current threshold is determined based on relevant parameters such as the type of electrolytic cell, internal parameters, and the instrument withstand current at the downstream gas-liquid separation pipeline.

[0151] If an excessive leakage current signal is detected, such as when the leakage current signal is greater than or equal to the first current threshold, it is determined that the insulation between the terminal plate and the terminal pressure plate 110 has failed, and a leakage current fault is transmitted. The electrolytic cell will then be shut down for repair due to a direct fault.

[0152] According to the control method of the electrolytic cell provided in the embodiments of this disclosure, by setting the insulation detection module 10, the leakage current signal between the end plate 110 and the ground can be collected and detected during the operation of the electrolytic cell, so as to quickly respond in the event of insulation failure, control the electrolytic cell to stop, ensure the safe operation of the electrolytic cell throughout the entire working cycle, and is low in cost and easy to implement.

[0153] In some embodiments, the impedance signal and leakage current signal can be acquired and detected independently; in some embodiments, they can be acquired simultaneously without interfering with each other.

[0154] As shown in Figure 12, in some embodiments, determining the electrode insulation failure of the electrolytic cell based on the sampling signal may include:

[0155] If the impedance signal is not greater than the first impedance threshold, the insulation between the electrode plate and the pull rod is determined to be faulty.

[0156] In this embodiment, the first impedance threshold can be user-defined or obtained based on experimental testing or historical data statistics. The first impedance threshold R1 is the minimum impedance value between the electrode 130 and the pull rod 140 under normal operating conditions.

[0157] The first impedance threshold can be determined based on relevant parameters such as the type of electrolytic cell and voltage.

[0158] If the impedance signal is less than or equal to the first impedance threshold, it is determined that the insulation between the electrode plate 130 and the pull rod 140 has failed, and a low insulation impedance fault is reported. The electrolytic cell is then directly shut down for maintenance.

[0159] Understandably, in actual operation, if a leakage current signal not less than the first current threshold and an impedance signal not greater than the first impedance threshold are detected, the electrode insulation of the electrolytic cell is considered to have failed, and the electrolytic cell is shut down.

[0160] According to the control method of the electrolytic cell provided in this embodiment, the end plate and end pressure plate 110, as well as the plate 130 and pull rod 140, can be synchronously detected during the operation of the electrolytic cell. The method can detect whether the plate 130 has insulation failure from multiple dimensions, which has high detection comprehensiveness and real-time performance. If the insulation failure of any component is confirmed, the system can be stopped for maintenance, which can effectively ensure the safe operation of the electrolytic cell throughout the entire working cycle.

[0161] Referring again to Figure 12, in some embodiments, where the insulation detection module 10 further includes a third terminal P3 and a fourth terminal P4, the sampling signal also includes a leakage current signal; after acquiring the sampling signal collected by the insulation detection module 10, the method may further include:

[0162] If the leakage current signal is not less than the second current threshold, the control outputs the first alarm message;

[0163] The second current threshold is less than the first current threshold.

[0164] In this embodiment, a second current threshold I2 can also be set, wherein the second current threshold I2 is less than the first current threshold I1. The second current threshold can be determined based on relevant parameters such as the type of electrolytic cell, internal parameters, and instrument withstand current at the downstream gas-liquid separation pipeline, or based on user-defined parameters.

[0165] When the leakage current signal is less than the second current threshold, the insulation between the terminal plate and the electrode plate is considered to be normal.

[0166] When the leakage current signal is between the second current threshold and the first current threshold, it is considered that the leakage current signal is not within the safe range, and there is a possibility of insulation failure between the terminal plate and the terminal pressure plate 110. Further testing is required, and the first alarm message is output to alert the user, indicating that there is a possibility of failure between the terminal plate and the terminal pressure plate 110 and corresponding measures need to be taken.

[0167] If, after taking corresponding measures, the leakage current signal continues to increase to a level greater than the first current threshold, it is considered to pose a significant risk. In this case, the electrolytic cell is directly shut down to further ensure operational safety.

[0168] Referring again to Figure 12, in some embodiments, after acquiring the sampling signal collected by the insulation detection module 10, the method may further include:

[0169] If the impedance signal is not greater than the second impedance threshold, the control outputs a second alarm message; wherein the second impedance threshold is greater than the first impedance threshold.

[0170] In this embodiment, a second impedance threshold R2 can also be set, wherein the second impedance threshold R2 is greater than the first impedance threshold R1. The second impedance threshold can be determined based on relevant parameters such as the type of electrolytic cell and voltage, or based on user-defined parameters.

[0171] When the impedance signal is greater than the second impedance threshold, the insulation between the electrode plate and the pull rod is considered to be normal.

[0172] When the impedance signal is between the second impedance threshold and the first impedance threshold, it is considered that the impedance signal is not within the safe range, and there is a possibility of insulation failure between the electrode plate 130 and the pull rod 140. Further testing is required, and a second alarm message is output to alert the user, indicating that there is a possibility of failure between the electrode plate 130 and the pull rod 140 and corresponding measures need to be taken.

[0173] If, after taking corresponding measures, the impedance signal continues to decrease to below the first impedance threshold, it is considered to pose a significant risk. In this case, the electrolytic cell is directly shut down to further ensure operational safety.

[0174] According to the control method of the electrolytic cell provided in the embodiments of this disclosure, by setting multiple detection thresholds, an alarm warning is first issued. If the problem still cannot be solved, the electrolytic cell is controlled to stop, thereby realizing graded protection of faults and effectively ensuring the safe operation of the electrolytic cell.

[0175] In some embodiments, prior to step 1010, the method may further include:

[0176] The first sub-end of the control unit connected to the target lever 140 among the multiple levers 140 is connected to the first common end of the first switching unit 170.

[0177] In this embodiment, the electrolytic cell insulation detection device may further include a first switching unit 170.

[0178] The target pull rod 140 can be any of the multiple pull rods 140. In actual operation, a first sub-switch can be set between the first sub-end and the first common end. By controlling the closing of the first sub-switch, the first sub-end is connected to the second end P2, thereby connecting the target pull rod 140 to the electrode plate 130 of the electrolytic cell. The insulation impedance sampling module 160 collects the impedance signal between the target pull rod 140 and the electrode plate 130 to detect insulation failure between the target pull rod 140 and the electrode plate 130.

[0179] In some embodiments, where the electrolytic cell insulation detection device includes a first switching unit 170, the method may further include the following steps prior to step 1010:

[0180] Based on the target time interval, the first sub-end of each of the multiple levers 140 is sequentially connected to the first common end of the first switching unit 170.

[0181] In this embodiment, the target time interval can be user-defined. By controlling the sequential closing of each first sub-switch, the inspection of each pull rod 140 can be achieved, thereby improving the detection efficiency.

[0182] According to the control method of the electrolytic cell provided in the embodiments of this disclosure, by setting up a first switching unit 170, only one insulation impedance sampling module 160 is needed to detect the insulation failure between each pull rod 140 and the electrode plate 130 of the electrolytic cell, and quickly locate the faulty pull rod 140. It has high flexibility and detection accuracy, further improves the safety of the electrolytic cell, and has low setup cost and small space occupation.

[0183] In some embodiments, when the electrolytic cell insulation detection device includes a second switching unit 180, the control logic of the second switching unit 180 is similar to that of the first switching unit 170, and will not be described in detail here.

[0184] This disclosure also provides a hydrogen production apparatus.

[0185] As shown in Figure 9, the hydrogen production device includes an electrolyzer 210, a hydrogen production power supply 220, and a gas-liquid separation and purification device 230 as described in any of the above embodiments.

[0186] In this embodiment, the electrolytic cell can be an alkaline electrolytic cell, a PEM electrolytic cell, or other types of electrolytic cells.

[0187] The control unit 190 in the electrolytic cell insulation detection device is electrically connected to the hydrogen production power supply 220 and the gas-liquid separation and purification device 230, respectively.

[0188] One or more electrolytic cells can correspond to one gas-liquid separation and purification device 230.

[0189] In some embodiments, the control unit 190 may be integrated into the electrolytic cell insulation detection device; or it may be independently disposed outside the electrolytic cell insulation detection device and electrically connected to the leakage current sampling module 150 and the insulation impedance sampling module 160.

[0190] Electrolytic cells and electrolytic cell insulation detection devices can be set up one-to-one; alternatively, a second switching unit can be integrated to connect multiple electrolytic cells to one electrolytic cell insulation detection device. By controlling the opening and closing state of the second sub-switch in the second switching unit, it can be connected to different electrolytic cells to periodically detect the leakage current and insulation impedance parameters of different electrolytic cells.

[0191] According to the hydrogen production apparatus provided in the embodiments of this disclosure, by setting the insulation detection module 10, the insulation failure of the electrode plate can be effectively detected. The operation is simple and easy to implement. Moreover, the detection can be carried out during the operation of the electrolyzer, which facilitates the discovery of faults, effectively ensures the safety of the electrolyzer operation, and extends the service life of the electrolyzer.

[0192] This disclosure also provides an insulation testing method for an electrolytic cell.

[0193] As shown in Figure 11, the insulation testing method for the electrolytic cell includes steps 1110 and 1120.

[0194] Step 1110: Obtain at least one of the leakage current signal from the end plate of the electrolytic cell to ground and the impedance signal between the electrode plate and the pull rod of the electrolytic cell.

[0195] In this step, the leakage current signal is the current generated when the insulation between the terminal plate and the terminal plate of the leakage current sampling module fails. Under normal circumstances, the leakage current signal is a small value, or even 0; when insulation failure occurs, the leakage current signal is larger.

[0196] The impedance signal is the impedance value between the pull rod and the electrode plate connected to the insulation impedance sampling module. Under normal circumstances, the impedance signal is a large value; in the event of insulation failure, the impedance signal is small, or even zero.

[0197] During the operation of the electrolytic cell, leakage current and impedance signals can be collected in real time at certain time intervals.

[0198] Step 1120: Perform insulation testing on the electrolytic cell based on at least one of the leakage current signal and impedance signal.

[0199] In this step, if one or more of the following conditions are detected: excessive leakage current signal or excessive impedance signal, it is considered that the electrode insulation of the electrolytic cell has failed, and the electrolytic cell can be controlled to stop working and be shut down for maintenance.

[0200] The insulation detection method for electrolytic cells provided in this disclosure can collect and detect the leakage current signal between the end plate and the ground and the impedance value between the electrode plate and the tie rod during the operation of the electrolytic cell, so as to respond quickly in the event of insulation failure, control the electrolytic cell to shut down, and ensure the safe operation of the electrolytic cell throughout the entire working cycle.

[0201] In some embodiments, insulation testing of the electrolytic cell based on at least one of leakage current signal and impedance signal may include:

[0202] If the leakage current signal is not less than the first current threshold and / or the impedance signal is not greater than the first impedance threshold, the electrode insulation of the electrolytic cell is determined to be faulty.

[0203] In this embodiment, the first current threshold and the first impedance threshold can be user-defined or obtained from experimental tests or historical data statistics.

[0204] The first current threshold is the maximum value of the leakage current between the terminal plate and ground under normal operating conditions.

[0205] The first impedance threshold is the minimum impedance value between the plate and the rod under normal operating conditions.

[0206] If the leakage current signal is greater than or equal to the first current threshold, the insulation between the terminal plate and the terminal pressure plate is determined to be faulty; if the impedance signal is less than or equal to the first impedance threshold, the insulation between the plate and the pull rod is determined to be faulty.

[0207] If any one or more insulation failures are detected, the electrode insulation of the electrolytic cell is considered to have failed.

[0208] The insulation detection method for electrolytic cells provided in this disclosure can simultaneously detect the end plates and end pressure plates, as well as the plates and tie rods, during the operation of the electrolytic cell. It can detect whether the plates have insulation failure from multiple dimensions, and has high detection comprehensiveness and real-time performance. If the insulation failure of any component is confirmed, the system can be shut down for maintenance, effectively ensuring the safe operation of the electrolytic cell throughout the entire working cycle.

[0209] In some embodiments, insulation testing of the electrolytic cell based on at least one of leakage current signal and impedance signal may include:

[0210] If the leakage current signal is not less than the second current threshold, output the first alarm message;

[0211] If the impedance signal is not greater than the second impedance threshold, output the second alarm information;

[0212] The second current threshold is less than the first current threshold, and the second impedance threshold is greater than the first impedance threshold.

[0213] In this embodiment, when the leakage current signal is between the second current threshold and the first current threshold, it is considered that the leakage current signal is not within the safe range, and there is a possibility of insulation failure between the terminal plate and the terminal pressure plate. Further detection is required, and a first alarm message is output to alert the user, indicating that there is a possibility of failure between the terminal plate and the terminal pressure plate and that corresponding measures need to be taken.

[0214] When the impedance signal is between the second impedance threshold and the first impedance threshold, it is considered that the impedance signal is not within the safe range, and there is a possibility of insulation failure between the electrode plate and the pull rod. Further testing is required, and a second alarm message is output to alert the user that there is a possibility of failure between the electrode plate and the pull rod and that corresponding measures need to be taken.

[0215] If, after taking corresponding measures, the impedance signal continues to decrease to below the first impedance threshold, or the leakage current signal continues to increase to above the first current threshold, it is considered that there is a significant risk. In this case, the electrolytic cell is directly shut down to further ensure operational safety.

[0216] According to the insulation detection method for electrolytic cells provided in this disclosure, by setting multiple detection thresholds, an alarm warning is first issued. If the problem still cannot be solved, the electrolytic cell is shut down, thereby achieving graded protection of faults and effectively ensuring the safe operation of the electrolytic cell.

[0217] In some embodiments, before acquiring at least one of the leakage current signal of the end plate of the electrolytic cell to ground and the impedance signal between the electrode plate and the tie rod of the electrolytic cell, the method may further include:

[0218] Based on the type of electrolytic cell, obtain the test leakage current signal of the end plate to ground and the test impedance signal between the electrode plate and the tie rod of the electrolytic cell under multiple different operating conditions.

[0219] Based on the test leakage current signal and the test impedance signal, the first current threshold, the second current threshold, the first impedance threshold, and the second impedance threshold are determined.

[0220] In this embodiment, the first current threshold, the second current threshold, the first impedance threshold, and the second impedance threshold can be determined according to the type of electrolytic cell.

[0221] For example, for a certain type of electrolytic cell, test its maximum leakage current under normal conditions, and the leakage current values ​​under different degrees of failure when insulation failure occurs. Take the value that is slightly less than the maximum leakage current under normal conditions as the second current threshold, and take the maximum value or greater than the maximum value as the first current threshold.

[0222] The setting methods for the first and second impedance thresholds are similar to those for the current threshold, and will not be elaborated here.

[0223] According to the insulation detection method for electrolytic cells provided in this disclosure, by setting multiple detection thresholds, an alarm warning is first issued. If the problem still cannot be solved, the electrolytic cell is shut down, thereby achieving graded protection of faults and effectively ensuring the safe operation of the electrolytic cell.

[0224] The control method provided in this disclosure can be executed by a control device. This disclosure uses the example of a control device executing the control method to illustrate the control device provided in this disclosure.

[0225] This disclosure also provides a control device.

[0226] As shown in Figure 13, the control device includes a first processing module 1310 and a second processing module 1320.

[0227] The first processing module 1310 is used to acquire the sampling signal collected by the insulation detection module, the sampling signal including the impedance signal;

[0228] The second processing module 1320 is used to control the electrolytic cell to shut down when the electrode insulation of the electrolytic cell is determined to be in failure based on the sampling signal.

[0229] According to the control device provided in the embodiments of this disclosure, by setting an insulation detection module, the impedance value between the electrode plate and the tie rod can be collected and detected during the operation of the electrolytic cell, so as to respond quickly in the event of insulation failure, control the electrolytic cell to stop, and ensure the safe operation of the electrolytic cell throughout the entire working cycle.

[0230] In some embodiments, the sampling signal further includes a leakage current signal; the second processing module 1320 can also be used for:

[0231] If the leakage current signal is not less than the first current threshold, it is determined that the insulation between the electrode plate and the terminal plate has failed.

[0232] In some embodiments, the second processing module 1320 may also be used for:

[0233] If the impedance signal is not greater than the first impedance threshold, the insulation between the electrode plate and the pull rod is determined to be faulty.

[0234] In some embodiments, the device may further include a fifth processing module for:

[0235] If the impedance signal is not greater than the second impedance threshold, the control outputs a second alarm message; wherein the second impedance threshold is greater than the first impedance threshold.

[0236] In some embodiments, the sampling signal further includes a leakage current signal; the fifth processing module can also be used for:

[0237] If the leakage current signal is not less than the second current threshold, the control outputs the first alarm message;

[0238] The second current threshold is less than the first current threshold.

[0239] In some embodiments, the device may further include a sixth processing module for:

[0240] Before acquiring the sampling signal collected by the insulation detection module, the first sub-end connected to the target tie rod among the multiple tie rods is connected to the first common end of the first switching unit.

[0241] In some embodiments, the device may further include a seventh processing module for:

[0242] Before acquiring the sampling signal collected by the insulation detection module, based on the target time interval, the first sub-end connected to each of the multiple pull rods is sequentially connected to the first common end of the first switching unit.

[0243] In some embodiments, the device may further include an eighth processing module for:

[0244] Before acquiring the sampling signal collected by the insulation detection module, the second sub-terminal connected to the target electrolytic cell among multiple electrolytic cells is connected to the second common terminal of the second switching unit.

[0245] The control device in this embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this embodiment does not specifically limit the specific operating system.

[0246] The control device provided in this disclosure can implement the various processes implemented in the method embodiments of FIG10 and FIG12. To avoid repetition, it will not be described again here.

[0247] The insulation detection method for electrolytic cells provided in this disclosure can be executed by an insulation detection device for electrolytic cells. This disclosure uses the insulation detection device for electrolytic cells executing a control method as an example to illustrate the insulation detection device for electrolytic cells provided in this disclosure.

[0248] This disclosure also provides an insulation testing device for an electrolytic cell.

[0249] As shown in Figure 14, the insulation detection device for the electrolytic cell includes a third processing module 1410 and a fourth processing module 1420.

[0250] The third processing module 1410 is used to acquire at least one of the leakage current signal of the end plate of the electrolytic cell to ground and the impedance signal between the electrode plate and the pull rod of the electrolytic cell.

[0251] The fourth processing module 1420 is used to perform insulation detection on the electrolytic cell based on at least one of leakage current signal and impedance signal.

[0252] The insulation detection device for an electrolytic cell provided in this embodiment can collect and detect the leakage current signal between the end plate and the ground and the impedance value between the electrode plate and the tie rod during the operation of the electrolytic cell, so as to respond quickly in the event of insulation failure, control the electrolytic cell to stop, and ensure the safe operation of the electrolytic cell throughout the entire working cycle.

[0253] In some embodiments, the fourth processing module 1420 can also be used for:

[0254] If the leakage current signal is not less than the first current threshold and / or the impedance signal is not greater than the first impedance threshold, the electrode insulation of the electrolytic cell is determined to be faulty.

[0255] In some embodiments, the fourth processing module 1420 can also be used for:

[0256] If the leakage current signal is not less than the second current threshold, output the first alarm message;

[0257] If the impedance signal is not greater than the second impedance threshold, output the second alarm information;

[0258] The second current threshold is less than the first current threshold, and the second impedance threshold is greater than the first impedance threshold.

[0259] In some embodiments, the device may further include a seventh processing module for:

[0260] Before acquiring at least one of the leakage current signal from the end plate to ground of the electrolytic cell and the impedance signal between the electrode plate and the tie rod of the electrolytic cell, the test leakage current signal from the end plate to ground and the test impedance signal between the electrode plate and the tie rod of the electrolytic cell under multiple different operating conditions are acquired, depending on the type of electrolytic cell.

[0261] Based on the test leakage current signal and the test impedance signal, the first current threshold, the second current threshold, the first impedance threshold, and the second impedance threshold are determined.

[0262] The insulation detection device for the electrolytic cell in this embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This embodiment does not impose specific limitations.

[0263] The insulation detection device for the electrolytic cell in this embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this embodiment does not impose specific limitations.

[0264] The insulation detection device for the electrolytic cell provided in this embodiment can realize the various processes implemented in the method embodiment of FIG11. To avoid repetition, it will not be described again here.

[0265] In some embodiments, as shown in FIG15, this disclosure also provides an electronic device 1500, including a processor 1501, a memory 1502, and a computer program stored in the memory 1502 and executable on the processor 1501. When the program is executed by the processor 1501, it implements the various processes of the above-described control method or electrolytic cell insulation detection method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0266] It should be noted that the electronic devices in this disclosure include the mobile electronic devices and non-mobile electronic devices described above.

[0267] This disclosure also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described control method or electrolytic cell insulation detection method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0268] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0269] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described control method or electrolytic cell insulation detection method.

[0270] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0271] This disclosure also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described control method or electrolytic cell insulation detection method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0272] It should be understood that the chip mentioned in the embodiments of this disclosure may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0273] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this disclosure is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0274] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0275] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

[0276] In the description of this disclosure, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this disclosure, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0277] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrolytic cell insulation detection device, wherein, include: An insulation detection module includes a first end and a second end, the first end being configured to connect to an electrode plate of an electrolytic cell, and the second end being configured to connect to a pull rod of the electrolytic cell; The insulation detection module is configured to acquire the impedance signal of the electrolytic cell; The control unit, electrically connected to the insulation detection module, is configured to perform insulation detection based on the received impedance signal.

2. The electrolyzer insulation detection apparatus of claim 1, wherein, The insulation detection module further includes a third terminal and a fourth terminal, the third terminal being configured to be connected to the end plate of the electrolytic cell, and the fourth terminal being configured to be connected to ground; the insulation detection module is also configured to collect the leakage current signal of the electrolytic cell; the control unit is also configured to perform insulation detection based on the received leakage current signal.

3. The electrolytic cell insulation detection apparatus of claim 2, wherein, The insulation detection module includes an insulation impedance sampling module and a leakage current sampling module. The insulation impedance sampling module includes a first terminal and a second terminal, and the leakage current sampling module includes a third terminal and a fourth terminal.

4. The electrolytic cell insulation detection apparatus of claim 3, wherein, The insulation impedance sampling module includes an unbalanced bridge circuit.

5. The electrolytic cell insulation detection apparatus of claim 3 or 4, wherein, At least one insulation impedance sampling module is provided, and the second end of each insulation impedance sampling module is respectively configured to connect to different pull rods on the electrolytic cell; or, At least one leakage current sampling module is provided, and the first end of each leakage current sampling module is configured to connect to different end plates on the electrolytic cell.

6. The electrolyzer insulation detection apparatus of any of claims 1-5, wherein, It also includes: a first switching unit, the first switching unit including a first common terminal and a plurality of first sub-terminals that can be selectively connected to the first common terminal; The first common terminal is connected to the first terminal, and multiple first sub-terminals are configured to be connected to different pull rods on the electrolytic cell, respectively.

7. An electrolytic cell wherein, include: End pressure plate; Electrode plates; A pull rod, wherein the pull rod is insulated from the electrode plate and the end pressure plate; And the electrolytic cell insulation testing device as described in any one of claims 1-6; The electrolytic cell is connected to the electrolytic cell insulation detection device.

8. A control method in which, include: Acquire the sampling signal collected by the insulation detection module, the sampling signal including the impedance signal; If the electrode insulation of the electrolytic cell fails based on the sampled signal, the electrolytic cell is shut down.

9. The control method according to claim 8, wherein The sampling signal also includes a leakage current signal; determining the electrode insulation failure of the electrolytic cell based on the sampling signal includes: If the leakage current signal is not less than the first current threshold, it is determined that the insulation between the electrode plate and the terminal plate has failed. And / or, If the impedance signal is not greater than the first impedance threshold, it is determined that the insulation between the electrode plate and the pull rod has failed.

10. The control method according to claim 8 or 9, wherein, After acquiring the sampling signal collected by the insulation detection module, the method further includes: If the impedance signal is not greater than the second impedance threshold, the system outputs a second alarm message; wherein the second impedance threshold is greater than the first impedance threshold.

11. The control method according to any one of claims 8-10, wherein, The sampling signal also includes a leakage current signal; after acquiring the sampling signal collected by the insulation detection module, the method further includes: If the leakage current signal is not less than the second current threshold, the control outputs the first alarm information; Wherein, the second current threshold is less than the first current threshold.

12. The control method according to any one of claims 8-11, wherein, Before acquiring the sampling signal collected by the insulation detection module, the method further includes: The first sub-end of the control unit, which is connected to the target lever among multiple levers, is connected to the first common end of the first switching unit.

13. A hydrogen production apparatus, wherein, include: The electrolytic cell as described in claim 7; Hydrogen production power source; A gas-liquid separation and purification device, wherein the electrolyzer is connected between the hydrogen production power source and the gas-liquid separation and purification device; The control unit in the electrolytic cell insulation detection device is electrically connected to the hydrogen production power supply and the gas-liquid separation and purification device, respectively.

14. An insulation testing method for an electrolytic cell, wherein, include: Acquire at least one of the following: the leakage current signal from the end plate of the electrolytic cell to ground and the impedance signal between the electrode plate and the pull rod of the electrolytic cell; Insulation detection is performed on the electrolytic cell based on at least one of the leakage current signal and the impedance signal.

15. The insulation testing method for an electrolytic cell according to claim 14, wherein, The insulation detection of the electrolytic cell based on at least one of the leakage current signal and the impedance signal includes: If the leakage current signal is not less than a first current threshold and / or the impedance signal is not greater than a first impedance threshold, the electrode insulation of the electrolytic cell is determined to be faulty.

16. The insulation testing method for an electrolytic cell according to claim 14 or 15, wherein, The insulation detection of the electrolytic cell based on at least one of the leakage current signal and the impedance signal includes: If the leakage current signal is not less than the second current threshold, output the first alarm information; If the impedance signal is not greater than the second impedance threshold, output a second alarm message; Wherein, the second current threshold is less than the first current threshold, and the second impedance threshold is greater than the first impedance threshold.

17. The insulation testing method for an electrolytic cell according to any one of claims 14-16, wherein, Before acquiring at least one of the leakage current signal from the end plate of the electrolytic cell to ground and the impedance signal between the electrode plate and the pull rod of the electrolytic cell, the method further includes: According to the type of electrolytic cell, obtain the test leakage current signal of the end plate to ground and the test impedance signal between the electrode plate and the pull rod of the electrolytic cell under multiple different operating conditions; Based on the test leakage current signal and the test impedance signal, a first current threshold, a second current threshold, a first impedance threshold, and a second impedance threshold are determined.

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