Online current monitoring device, monitoring method and its application in electrolytic copper foil

Abstract

The present invention relates to the field of current monitoring technology, and in particular to an online current monitoring device, a monitoring method and their application in electrolytic copper foil. The online current monitoring device includes an electrolytic cell and an anode plate arranged inside the electrolytic cell; also includes a cathode roller module, which is rotatably arranged in the middle of the electrolytic cell and located above the anode plate; a light emitting module, which is arranged above the cathode roller module, and its emitting end faces the outer wall of the cathode roller module; a light reflecting module, which is arranged above the cathode roller module and is used to reflect light emitted by the light emitting module; and a light receiving module, which is arranged above the cathode roller module and is used to receive light reflected by the light reflecting module. The present invention can monitor the current density of each area of ​​the cathode roller module in real time by arranging the light emitting module, the light reflecting module and the light receiving module. By detecting the landing point and intensity of the light, it can accurately determine whether the current density distribution of the cathode roller module is uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of current monitoring, and in particular to an online current monitoring device, a monitoring method and applications thereof in electrolytic copper foil. Background Art

[0002] The manufacturing process of electrolytic copper foil involves supplying electricity to the electrolytic cell of the foil production machine, whereupon electrochemical reactions deposit copper foil on the surface of the cathode roller. This production process requires extremely high precision in the thickness and surface density of the copper foil; even the slightest deviation is unacceptable. The specifications and unit weight of the copper foil are directly affected by the operating current. Therefore, maintaining a constant operating current in the foil production machine is crucial to ensuring the stability of the electrolytic copper foil process.

[0003] Currently, the foil machine's online current is monitored by presetting the total operating current value via a touch panel. This setting is then received by the control board, which, after precise calculation, distributes the total current scientifically to the four power supply cabinets. Each power supply cabinet is equipped with a Hall effect sensor to detect and monitor the actual operating current.

[0004] However, in the process of detecting current in the prior art, it is easily affected by electric force or magnetic force, resulting in a deviation between the detected current value and the actual current value, thereby causing uneven thickness distribution of the copper foil.

[0005] In response to the above problems, the Chinese patent application number CN202310011276.9 discloses a current monitoring device for the power supply of a foil machine, which relates to the technical field of accessories for foil machines, including an electrolytic cell, a high-frequency power supply, a conductive bar and a current monitoring component. The current monitoring component is arranged on the outside of the conductive bar, and the conductive bar and the current monitoring component are both provided in multiple groups. By providing the conductive bar and the current monitoring component, the conductive bar can realize the transmission of current between the high-frequency power supply and the electrolytic cell, and the current monitoring component is arranged around the outside of the conductive bar. In the process of transmitting current, the conductive bar can monitor the current and transmit the monitoring information to the data display on the outside of the electrolytic cell to realize the current monitoring during the operation of the foil machine. The current monitoring component, the conductive bar and the high-frequency power supply correspond one to one, so that the simultaneous monitoring of multiple power supplies can be realized, which makes it convenient for the staff to make timely adjustments to the high-frequency power supply for the foil machine.

[0006] In summary, although the existing patented design can monitor the current entering the foil machine in real time by introducing a current monitoring component, in actual application, there is a direct connection between the thickness of the copper foil and whether the current density distributed on the cathode roller is uniform. Although there is a method in the prior art to reflect the current density distributed on the cathode roller by detecting the thickness of the copper foil, this method cannot reflect the cause of the uneven distribution of the current density on the cathode roller.

[0007] Therefore, in view of the limitations of current monitoring technology, the development of an online current monitoring device, monitoring method and its application in electrolytic copper foil is particularly urgent and important for promoting the development of related technical fields. Summary of the Invention

[0008] The object of the present invention is to provide an online current monitoring device, a monitoring method and their application in electrolytic copper foil to solve the technical problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] An online current monitoring device includes an electrolytic cell and an anode plate arranged inside the electrolytic cell;

[0011] It also includes a cathode roller module, which is rotatably arranged in the middle of the electrolytic cell and located above the anode plate;

[0012] a light emitting module, which is arranged above the cathode roller module, with its emitting end facing the outer wall of the cathode roller module;

[0013] A light reflection module is provided above the cathode roller module and is used to reflect the light emitted by the light emission module;

[0014] a light receiving module, which is arranged above the cathode roller module and is used to receive the light reflected by the light reflecting module;

[0015] The light emitted from the light emitting module is reflected by the cathode roller module and the light reflecting module and falls on the light receiving module. The landing point of the light on the light receiving module is detected to determine whether the current density distribution on the cathode roller module is uniform.

[0016] Preferably, the optical transmission module includes:

[0017] A mounting seat, wherein a mounting plate is provided above the cathode roller module, a mounting seat is provided on the outside of the mounting plate, and a power element is provided inside the mounting seat;

[0018] A movable block, wherein a movable groove is provided inside the mounting seat, a movable block is provided inside the movable groove, and a light emitting head is provided outside the movable block;

[0019] An elastic member is provided on the outer side of the movable block, and one end of the elastic member away from the movable block is connected to the movable groove.

[0020] Preferably, a ferromagnetic block is provided inside the movable block, and the movable block is pulled by the magnetic field of the cathode roller module to slide inside the movable groove.

[0021] Preferably, the light reflection module includes a mounting portion arranged above the cathode roller module, the mounting portion is provided with array-distributed rotating members, and a reflective member is provided on the outer side of the rotating member, and the rotating member can drive the reflective member to rotate around the mounting portion as the center.

[0022] Preferably, the light receiving module includes a base arranged above the cathode roller module, and a partition is provided on the outside of the base, which divides the base into different sections. Each section is provided with a receiving part, and the receiving part is used to receive the light reflected by the light reflecting module.

[0023] Preferably, the cathode roller module comprises:

[0024] A rotating shaft, the rotating shaft being rotatably connected to the middle portion of the electrolytic cell, a conductive sleeve being provided on the outer side of the rotating shaft, and conductive rings being provided at both ends of the conductive sleeve;

[0025] The conductive cylinder is arranged on the outside of the conductive sleeve. A titanium cylinder is provided on the outside of the conductive cylinder. Both ends of the titanium cylinder are provided with side plates, and the side plates are connected to the conductive sleeve.

[0026] Preferably, a connecting assembly is provided between the conductive cylinder and the conductive sleeve, and the connecting assembly includes:

[0027] An outer connecting ring and an inner connecting ring, wherein the outer connecting ring array is distributed on the outer side of the conductive sleeve, and the inner connecting ring array is distributed on the inner side of the conductive cylinder;

[0028] Conductive tape, the conductive tape array is distributed between two opposite outer connecting rings and an inner connecting ring, the two ends of the conductive tape are respectively connected to the outer connecting ring and the inner connecting ring, and a temperature sensor is provided at the connection between the conductive tape and the outer connecting ring and the inner connecting ring.

[0029] Preferably, a stripping roller is provided on the outer side of the cathode roller module, and the stripping roller is used to strip the copper foil on the surface of the cathode roller module.

[0030] A monitoring method for monitoring current using an online current monitoring device, the monitoring method comprising the following steps:

[0031] S1. During the operation of the cathode roller module, the light emitting module is used to project light onto its outer surface. After reflection, the light passes through the light reflecting module and the light receiving module in sequence. By analyzing the reflection area and position information of the light on the light receiving module, the current density distribution uniformity of the cathode roller module is evaluated.

[0032] S2. If the light landing point is located in the upper half of the light receiving module and its position keeps changing, it indicates that the outer wall of the cathode roller module is uneven, causing the position of the light emitting head in the movable slot to change, which in turn causes the light landing point to deviate from the preset position;

[0033] S3. If the light landing point is located in the lower half of the light receiving module, it indicates that the internal connection components of the cathode roller module are loose, causing the light reflecting module to tilt, thereby causing the light landing point to deviate from the preset position.

[0034] The invention discloses an application of an online current monitoring device in electrolytic copper foil.

[0035] The technical effects and advantages of the present invention are as follows:

[0036] 1. The present invention provides a light emitting module, a light reflecting module, and a light receiving module to monitor the current density in each area of ​​the cathode roller module in real time. By detecting the landing point and intensity of the light, it can accurately determine whether the current density distribution of the cathode roller module is uniform. This real-time monitoring function can promptly detect the problem of uneven current density distribution, avoid copper foil production defects caused by uneven current distribution, and improve production efficiency and product quality.

[0037] 2. The online current monitoring device of the present invention can distinguish between uneven current density distribution caused by different reasons. When impurities are deposited on the surface of the titanium tube, the magnetic field strength of the impurity area increases, and the movable block moves toward the bottom of the movable groove, causing the light to fall into the upper half of the receiving part; when corrosion occurs on the surface of the titanium tube, the magnetic field strength of the corrosion area decreases, and the movable block moves toward the top of the movable groove, causing the light to fall into the lower half of the receiving part; in addition, if the conductive belt connection is loose, the magnetic field strength of the loose area decreases, the movable block moves, and the reflector deflects at the same time, the light path changes, and finally falls into the upper half of the receiving part; by analyzing the landing position and distribution pattern of the light, different situations such as impurity deposition, surface corrosion and loose connection can be clearly distinguished, providing a basis for targeted maintenance and repair, avoiding blind repairs, and improving the reliability and service life of the equipment.

[0038] 3. The present invention achieves high-precision monitoring of current density in various areas of the cathode roller module by providing multiple light emitting heads, reflectors, and receivers, ensuring their corresponding number and position. The light emitting heads project light directionally onto the surface of the titanium cylinder. The smooth, mirror-like surface of the cylinder reflects the light to the reflectors, which then transmit the light to the photoelectric sensor in the receiver. By detecting the magnitude of the value received by the photoelectric sensor and the location of the light, changes in current density can be accurately determined. This high-precision monitoring method can detect even small changes in current density, avoiding problems such as local overheating and uneven copper foil quality caused by uneven current distribution, thereby improving the stability and product quality of the entire electrolytic copper foil production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0040] Figure 2 This is a schematic structural diagram of the cathode roller module of the present invention;

[0041] Figure 3 Schematic diagram of the structure of the optical transmission module of the present invention;

[0042] Figure 4 It is a structural schematic diagram of the mounting base of the present invention;

[0043] Figure 5 Schematic diagram of the structure of the optical receiving module of the present invention;

[0044] Figure 6 This is a schematic diagram of a first working state of the optical transmission module of the present invention;

[0045] Figure 7 This is a schematic diagram of a second working state of the optical transmission module of the present invention;

[0046] Figure 8 Schematic diagram of the third working state of the optical transmission module of the present invention;

[0047] Figure 9 Schematic diagram of the fourth working state of the optical transmission module of the present invention;

[0048] Figure 10 Schematic diagram of the principle of the electrolytic copper foil of the present invention;

[0049] Figure 11 It is the logic control diagram of the present invention.

[0050] The accompanying drawings are:

[0051] 1. Electrolyzer;

[0052] 2. Anode plate;

[0053] 3. Cathode roller module; 301. Rotating shaft; 302. Conductive sleeve; 303. Conductive ring; 304. Side plate; 305. Conductive cylinder; 306. Titanium cylinder; 307. Connecting assembly; 3071. Outer connecting ring; 3072. Inner connecting ring; 3073. Conductive belt;

[0054] 4. Optical transmitter module; 401. Mounting plate; 402. Mounting seat; 403. Movable slot; 404. Movable block; 405. Optical transmitter head; 406. Elastic member;

[0055] 5. Light reflection module; 501. Mounting portion; 502. Rotating member; 503. Reflecting member;

[0056] 6. Optical receiving module; 601. Base; 602. Partition; 603. Receiving unit;

[0057] 7. Peeling roller. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] Example 1

[0060] Reference Figures 1 to 10 As shown, the present invention provides an online current monitoring device, which includes an electrolytic cell 1 and an anode plate 2 arranged inside the electrolytic cell 1.

[0061] The electrolytic cell also includes a cathode roller module 3 , which is rotatably disposed in the middle of the electrolytic cell 1 and located above the anode plate 2 .

[0062] The cathode roller module 3 includes a rotating shaft 301 , which is rotatably connected to the middle of the electrolytic cell 1 . A conductive sleeve 302 is provided on the outer side of the rotating shaft 301 , and conductive rings 303 are provided at both ends of the conductive sleeve 302 .

[0063] The conductive cylinder 305 is arranged on the outside of the conductive sleeve 302 . A titanium cylinder 306 is provided on the outside of the conductive cylinder 305 . Both ends of the titanium cylinder 306 are provided with side plates 304 . The side plates 304 are connected to the conductive sleeve 302 .

[0064] Reference Figure 1 、 Figure 2 As shown, a connecting assembly 307 is provided between the conductive cylinder 305 and the conductive sleeve 302 . The connecting assembly 307 includes an outer connecting ring 3071 and an inner connecting ring 3072 . The outer connecting ring 3071 is distributed in an array on the outside of the conductive sleeve 302 , and the inner connecting ring 3072 is distributed in an array on the inside of the conductive cylinder 305 .

[0065] Conductive tape 3073 , the conductive tape 3073 array is distributed between two opposite outer connecting rings 3071 and inner connecting ring 3072 , and two ends of the conductive tape 3073 are connected to the outer connecting ring 3071 and the inner connecting ring 3072 respectively.

[0066] The conductive belt 3073 is mainly composed of a copper stranded wire belt or a conductive row, and its arrangement realizes a reliable electrical connection between the conductive sleeve 302 and the conductive cylinder 305, thereby enhancing the uniformity of the conductivity of the cathode roller surface.

[0067] Reference Figures 1 to 10 As shown, a stripping roller 7 is provided on the outer side of the cathode roller module 3 , and the stripping roller 7 is used to strip the copper foil on the surface of the cathode roller module 3 .

[0068] An electrolyte solution (typically containing copper ions) exists within the electrolytic cell 1. The anode plate 2 serves as the electrode for the oxidation reaction. During the electrolysis process, metal atoms on the surface of the anode plate 2 (typically an insoluble anode, such as titanium) (if the anode plate 2 is slightly soluble) or certain substances in the solution lose electrons, undergoing an oxidation reaction and entering the solution. The cathode roller module 3, on the other hand, serves as the electrode for the reduction reaction. Because the rotating shaft 301 of the cathode roller module 3 is connected to the negative power supply via conductive structures such as the conductive sleeve 302, electrons are conducted from the negative power supply to the cathode roller module 3 structures, such as the conductive sleeve 302 and the conductive cylinder 305. Under the influence of the electric field, the copper ions (Cu²⁺) in the solution migrate toward the surface of the cathode roller module 3, where they gain electrons and undergo a reduction reaction: Cu²⁺ + 2e⁻ = Cu. This gradually deposits copper foil on the cathode roller module 3 (specifically, on the surface of the titanium cylinder 306). As the electrolysis process continues, the copper foil continuously grows on the surface of the cathode roller module 3. When a certain thickness is reached and a firm metallic copper layer is formed, the copper foil on the surface of the cathode roller module 3 is peeled off by a peeling roller 7 arranged outside the cathode roller module 3 to obtain an electrolytic copper foil product.

[0069] This embodiment achieves direct current conduction by installing a connecting assembly 307 between the conductive sleeve 302 and the conductive cylinder 305. The current on the conductive sleeve 302 acts directly on the conductive cylinder 305 via the conductive tape 3073, ensuring uniform current distribution across the cathode roller surface. This effectively alleviates the problem of copper foil thickness deviation caused by uneven current density distribution across the cathode roller surface during the electrolytic copper foil process, ensuring that the copper foil thickness more closely meets the specified standard.

[0070] Example 2

[0071] Although the above embodiment successfully achieves uniform current distribution on the cathode roller surface by providing a connecting assembly 307 between the conductive sleeve 302 and the conductive cylinder 305, after a certain period of operation, factors such as vibration and thermal expansion can cause the conductive belt 3073 to deform, thereby causing the connection to loosen or fall off, forming a virtual connection, and affecting the conductivity of the roller. In addition, if impurities in the electrolyte adhere to the cathode roller, it will also cause uneven current density distribution on the roller surface, adversely affecting subsequent copper foil production. The existing technology lacks an online current monitoring device that can distinguish between different situations that cause uneven current density distribution on the roller surface. In view of this, we have made technical improvements based on the first embodiment. The specific improved technical solution is as follows:

[0072] Reference Figures 1 to 11 As shown, the present invention provides an online current monitoring device, comprising a light emitting module 4 , which is arranged above the cathode roller module 3 , with its emitting end facing the outer wall of the cathode roller module 3 .

[0073] The light reflection module 5 is arranged above the cathode roller module 3 and is used to reflect the light emitted by the light emission module 4 .

[0074] The light receiving module 6 is disposed above the cathode roller module 3 and is used to receive the light reflected by the light reflecting module 5 .

[0075] The light emitted from the light emitting module 4 is reflected by the cathode roller module 3 and the light reflecting module 5 and falls on the light receiving module 6. By detecting the landing point of the light on the light receiving module 6, it is determined whether the current density distribution on the cathode roller module 3 is uniform.

[0076] Reference Figures 1 to 4 As shown, the light emitting module 4 includes a mounting seat 402 , a mounting plate 401 is provided above the cathode roller module 3 , a mounting seat 402 is provided outside the mounting plate 401 , and a power element is provided inside the mounting seat 402 .

[0077] The movable block 404 has a movable groove 403 formed inside the mounting base 402 , the movable block 404 is provided inside the movable groove 403 , and a light emitting head 405 is provided outside the movable block 404 . The power element is electrically connected to the light emitting head 405 .

[0078] Elastic member 406 : An elastic member 406 is provided on the outer side of the movable block 404 , and one end of the elastic member 406 away from the movable block 404 is connected to the movable groove 403 .

[0079] The elastic member 406 includes a spring, one end of the spring is connected to the movable block 404 , and the other end of the spring is connected to the movable slot 403 .

[0080] A ferromagnetic block is provided inside the movable block 404 , and the movable block 404 is pulled by the magnetic field of the cathode roller module 3 to slide inside the movable groove 403 .

[0081] When the current density distribution in some areas of the cathode roller surface is uneven, the magnetic field in these areas will also be affected. At this time, the ferromagnetic block in the movable block 404 is affected by the magnetic field, driving the movable block 404 to move in the movable groove 403, thereby changing the position of the light emitting head 405.

[0082] Reference Figures 1 to 10 As shown, the light reflection module 5 includes a mounting portion 501 disposed above the cathode roller module 3. The mounting portion 501 is provided with an array of rotating members 502. A reflector 503 is provided outside the rotating members 502. The rotating members 502 can drive the reflector 503 to rotate around the mounting portion 501.

[0083] Temperature sensors are provided at the connection points between the conductive belt 3073 , the outer connecting ring 3071 and the inner connecting ring 3072 .

[0084] The temperature sensor is electrically connected to the rotating member 502. When the value sensed by the temperature sensor exceeds the set value, the temperature sensor sends an electrical signal to the rotating member 502, so that the corresponding rotating member 502 on the mounting portion 501 drives the reflective member 503 to deflect, thereby changing the landing point of the light.

[0085] Reference Figure 5 As shown, the light receiving module 6 includes a base 601 arranged above the cathode roller module 3, and a partition 602 is provided on the outside of the base 601. The partition 602 divides the base 601 into different intervals. Each interval is provided with a receiving part 603, and the receiving part 603 is used to receive the light reflected by the light reflecting module 5.

[0086] The receiving unit 603 includes an array of photoelectric sensors distributed in each interval. By detecting the size of the value received by the photoelectric sensor, the landing point of the light in a single interval can be determined.

[0087] It should be noted that in this embodiment, the number and position of the connecting components, light emitting head 405 and receiving part 603 correspond to each other. By setting the connecting components, light emitting head 405 and receiving part 603, real-time monitoring of the current density in each area of ​​the cathode roller module 3 is achieved, thereby improving the accuracy of current monitoring.

[0088] When in use, the light emitting head 405 on the mounting base 402 is started, and the light emitting head 405 projects light toward the outer surface of the titanium cylinder 306. Since the surface of the titanium cylinder 306 is a smooth mirror, after the light falls on the surface of the titanium cylinder 306, it is reflected by the outer surface of the titanium cylinder 306 to the reflective element 503, and the reflective element 503 then emits the light to the receiving part 603. By analyzing the landing point and intensity of the light on each receiving part 603, it is determined whether the current density distribution of the cathode roller module 3 is uniform.

[0089] Please note: Refer to Figure 5 As shown, the dotted line L divides the receiving part 603 into two different areas, the upper half area is area A, and the lower half area is area B. In the initial case, the landing point of the light is in the middle and the lower half of the receiving part 603. Figure 5 At the dotted line L in (specifically as Figure 6 shown).

[0090] When the cathode roller module 3 rotates to a specific angle, if the light emitted by some of the light emitting heads 405 falls into the corresponding area A of the receiving part 603, and the light emitted by the remaining light emitting heads 405 on the side of the light emitting head 405 falls into the corresponding area B of the receiving part 603, this phenomenon indicates that impurities have co-precipitated at the point where the light falls on the surface of the titanium cylinder 306 (that is, impurities are adhered to the surface of the titanium cylinder 306). The specific mechanism is as follows:

[0091] When conductive impurities deposit on the surface of titanium cylinder 306, they form a heterogeneous interface, which distorts the local electric field. Specifically, the conductive impurity particles act as "tips" in the electric field, inducing a tip discharge effect, causing an abnormal increase in the current density in that area. This abnormal increase in current density further increases the magnetic field strength in the area where the impurities adhere.

[0092] As the magnetic field increases in strength, its magnetic attraction to the ferromagnetic block in movable block 404 also increases. This magnetic attraction forces the ferromagnetic block to move movable block 404 toward the bottom of movable slot 403. This movement changes the relative position of light emitting head 405, which in turn affects the point where light lands on titanium cylinder 306. Ultimately, the light emitted by light emitting head 405 in the impurity-adhering area falls into area A of the corresponding receiving portion 603 due to the change in position.

[0093] According to the current continuity principle, the total current must remain continuous in the conductor. Therefore, when conductive impurities adhere to the surface of the cathode roller and cause the current density in that area to increase, the current density in the surrounding area may be reduced accordingly to maintain the continuity of the total current.

[0094] As the current density in the surrounding area decreases, the intensity of the magnetic field generated by it also weakens. This weakening magnetic field reduces the attractive force exerted on the ferromagnetic element in movable block 404. Under the elastic restoring force of elastic member 406, movable block 404 begins to move toward the top of movable slot 403. This displacement ultimately directs the light emitted by optical head 405 around the impurity adhesion area to region B of corresponding receiving unit 603.

[0095] When the cathode roller module 3 rotates to a certain angle, some of the light emitted by the light emitting head 405 falls into the corresponding area B of the receiving part 603, while the light emitted by the remaining light emitting heads 405 on the side of the light emitting head 405 falls into the corresponding area A of the receiving part 603. This indicates that the light has eroded the surface of the titanium cylinder 306 at the point where it falls (i.e., the surface roughness of the titanium cylinder 306 has increased). The specific mechanism is as follows:

[0096] When the surface of the titanium cylinder 306 is corroded, the oxides or corrosion products generated on the surface of the corroded area have high resistance characteristics, which hinder the conduction of electrons. According to Ohm's law, the increase in resistance causes the local current density to decrease significantly. The current is forced to bypass the surrounding undamaged low-resistance areas, resulting in an increase in the current density in the surrounding areas. This change in current density further triggers a corresponding adjustment in the magnetic field strength. In the corroded area, due to the decrease in current density, the intensity of the magnetic field generated by it also decreases. The weakening of the magnetic field strength leads to a decrease in the attraction to the ferromagnetic body in the movable block 404. Under the elastic restoring force of the elastic member 406, the movable block 404 begins to move toward the top of the movable groove 403. This displacement change ultimately causes the light emitted by the light emitting head 405 corresponding to the impurity-covered area to be guided to the B area of ​​the corresponding receiving part 603.

[0097] At the same time, due to the increase in current density around the eroded area, the light emitted by the light emitting head 405 corresponding to these areas is guided to the corresponding area A of the receiving part 603. This light signal distribution pattern provides a direct basis for detecting and analyzing the current density distribution on the cathode roller surface.

[0098] When the cathode roller module 3 rotates to a certain angle, if some of the light projected by the light emitting head 405 falls on area A of the corresponding receiving part 603, and the landing point of these light rays is much higher than the position when the movable block 404 is at the bottom of the movable groove 403, this phenomenon indicates that after a certain period of operation of the cathode roller module 3, the conductive belt 3073 may have loosened its connection with the outer connecting ring 3071 or the inner connecting ring 3072 due to factors such as vibration and thermal expansion. This loosening, in turn, affects the conductive performance of the titanium cylinder 306. The specific mechanism of action is explained as follows:

[0099] Loose connections significantly increase contact resistance. As contact resistance increases, Joule's law generates more Joule heat at the contact point. This accumulated heat triggers the temperature sensor, causing it to send an electrical signal to the associated rotating member 502. Upon receiving the signal, the rotating member 502 then causes the reflector 503 to deflect away from the optical transmitter module 4.

[0100] At the same time, if the internal wires are in poor contact, the conductivity of that area will decrease, and the current density will decrease accordingly. This reduced current density weakens the magnetic field generated in that area. This weakened magnetic field also reduces the attraction of the ferromagnetic element in movable block 404. Under the elastic force of elastic member 406, movable block 404 begins to move toward the top of movable slot 403.

[0101] The displacement of movable block 404, combined with the deflection of reflector 503 due to the temperature sensor, redirects light that was originally emitted by optical transmitter 405 and intended to fall into area B, corresponding to the impurity-covered area. This process reflects the indirect impact of the loose connection of conductive strip 3073 on the system's optical signal path.

[0102] Example 3

[0103] The present invention also provides a monitoring method for monitoring current using an online current monitoring device, the monitoring method comprising the following steps:

[0104] S1. During the operation of the cathode roller module 3, the light emitting module 4 is used to project light onto its outer surface. After reflection, the light passes through the light reflecting module 5 and the light receiving module 6 in sequence. By analyzing the reflection area and position information of the light on the light receiving module 6, the current density distribution uniformity of the cathode roller module 3 is evaluated.

[0105] S2. If the light landing point is located in the upper half of the light receiving module 6 and the position keeps changing, it indicates that the outer wall of the cathode roller module 3 is uneven, causing the position of the light emitting head 405 in the movable groove 403 to change, thereby causing the light landing point to deviate from the preset position.

[0106] S3. If the light landing point is located in the lower half of the light receiving module 6, it indicates that the internal connection component 307 of the cathode roller module 3 is loose, causing the light reflecting module 5 to tilt, thereby causing the light landing point to deviate from the preset position.

[0107] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An online current monitoring device, comprising an electrolytic cell and an anode plate disposed inside the electrolytic cell, characterized in that: A cathode roller module is rotatably arranged in the middle of the electrolytic cell and located above the anode plate; a light emitting module, which is arranged above the cathode roller module, with its emitting end facing the outer wall of the cathode roller module; A light reflection module is provided above the cathode roller module and is used to reflect the light emitted by the light emission module; a light receiving module, which is arranged above the cathode roller module and is used to receive the light reflected by the light reflecting module; The light emitted from the light emitting module is reflected by the cathode roller module and the light reflecting module and falls on the light receiving module. The point where the light falls on the light receiving module is detected to determine whether the current density distribution on the cathode roller module is uniform. The optical transmission module includes: A mounting seat, wherein a mounting plate is provided above the cathode roller module, a mounting seat is provided on the outside of the mounting plate, and a power element is provided inside the mounting seat; A movable block, wherein a movable groove is provided inside the mounting seat, a movable block is provided inside the movable groove, and a light emitting head is provided outside the movable block; An elastic member is provided on the outer side of the movable block, and one end of the elastic member away from the movable block is connected to the movable groove; A ferromagnetic block is provided inside the movable block, and the movable block slides inside the movable groove under the pull of the magnetic field of the cathode roller module.

2. The online current monitoring device according to claim 1, characterized in that: The light reflection module includes a mounting portion arranged above the cathode roller module, the mounting portion is provided with arrayed rotating members, and a reflecting member is provided outside the rotating member, and the rotating member can drive the reflecting member to rotate around the mounting portion as the center.

3. The online current monitoring device according to claim 1, characterized in that: The light receiving module includes a base arranged above the cathode roller module. A partition is provided on the outside of the base, which divides the base into different sections. Each section is provided with a receiving part for receiving the light reflected by the light reflecting module.

4. The online current monitoring device according to claim 1, characterized in that: The cathode roller module comprises: A rotating shaft, the rotating shaft being rotatably connected to the middle portion of the electrolytic cell, a conductive sleeve being provided on the outer side of the rotating shaft, and conductive rings being provided at both ends of the conductive sleeve; The conductive cylinder is arranged on the outside of the conductive sleeve. A titanium cylinder is provided on the outside of the conductive cylinder. Both ends of the titanium cylinder are provided with side plates, and the side plates are connected to the conductive sleeve.

5. The online current monitoring device according to claim 4, characterized in that: A connecting assembly is provided between the conductive cylinder and the conductive sleeve, and the connecting assembly includes: An outer connecting ring and an inner connecting ring, wherein the outer connecting ring array is distributed on the outer side of the conductive sleeve, and the inner connecting ring array is distributed on the inner side of the conductive cylinder; Conductive tape, the conductive tape array is distributed between two opposite outer connecting rings and an inner connecting ring, the two ends of the conductive tape are respectively connected to the outer connecting ring and the inner connecting ring, and a temperature sensor is provided at the connection between the conductive tape and the outer connecting ring and the inner connecting ring.

6. The online current monitoring device according to claim 1, characterized in that: A stripping roller is provided on the outer side of the cathode roller module, and the stripping roller is used to strip the copper foil on the surface of the cathode roller module.

7. A method for monitoring current using the online current monitoring device according to any one of claims 1 to 6, characterized in that: The monitoring method comprises the following steps: S1. During the operation of the cathode roller module, the light emitting module is used to project light onto its outer surface. After reflection, the light passes through the light reflecting module and the light receiving module in sequence. By analyzing the reflection area and position information of the light on the light receiving module, the current density distribution uniformity of the cathode roller module is evaluated. S2. If the light landing point is located in the upper half of the light receiving module and its position keeps changing, it indicates that the outer wall of the cathode roller module is uneven, causing the position of the light emitting head in the movable slot to change, which in turn causes the light landing point to deviate from the preset position; S3. If the light landing point is located in the lower half of the light receiving module, it indicates that the internal connection components of the cathode roller module are loose, causing the light reflecting module to tilt, thereby causing the light landing point to deviate from the preset position.

8. Use of the online current monitoring device according to any one of claims 1 to 7 in electrolytic copper foil.

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