Lithium battery copper foil coating film thickness detection device

Abstract

The invention belongs to the technical field of copper foil detection, and particularly relates to a lithium battery copper foil coating film thickness detection device which is installed in production line equipment, and a thickness detection module and an image detection module are installed in the detection device and used for detecting copper foil before and after coating; the detection device comprises a device main body; when the rotating belts carry the cleaning cotton to rotate and pass through the bottom of the storage tank, the cleaning cotton is wetted by the cleaning agent in the storage tank, and the rotating belts located on the upper side and the lower side of the copper foil drive the cleaning cotton to make contact with the copper foil at the same time, so that the copper foil is supported in the vertical direction when cleaned, and the situation that the copper foil is extruded to deform during cleaning due to the fact that the copper foil is thin is avoided; and protection measures for the copper foil are added, and the copper foil is protected in the cleaning process, so that the copper foil can be cleaned quickly, the cleaning efficiency is improved, the copper foil can enter detection quickly, and the detection efficiency of the copper foil is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of copper foil detection, in particular to a device for detecting the coating film thickness of a lithium battery copper foil. Background Art

[0002] Copper foil acts as a carrier of negative electrode active materials in lithium-ion batteries, and also acts as a collector and transmitter of negative electrode electron flow. Therefore, the tensile strength, elongation, density, surface roughness, thickness uniformity and appearance quality of electrolytic copper foil have a great influence on the negative electrode manufacturing process and electrochemical performance of lithium-ion batteries. Currently, lithium battery copper foil on the market is composed of 99.5% pure copper. According to thickness, it can be divided into ultra-thin copper foil (≤6μm), ultra-thin copper foil (6-12μm), thin copper foil (12-18μm), conventional copper foil (18-70μm), thick copper foil (≥70μm), etc. Its characteristics are heavy weight per unit area and high usage of metal copper. In lithium-ion batteries of the same volume, the thinner the thickness of the copper foil, the better its ability to carry negative electrode active materials, the larger the capacity of the battery, and the greater the effect on improving the energy density of the battery. The original production line equipment and process routes were not inspected, and product inspection required manual offline inspection after the copper foil was completed. If defects were found, a large number of products would be scrapped. Moreover, even if abnormalities were detected on the surface of the copper foil, manual intervention was still required to identify and judge the abnormalities that could be handled and cleared and those that could not be handled, which prolonged the inspection time of the copper foil and affected its production efficiency. Summary of the invention

[0003] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a device for detecting the coating thickness of lithium battery copper foil.

[0004] The technical solution adopted by the present invention to solve the technical problem is: the present invention proposes a lithium battery copper foil coating film thickness detection device, the detection device is installed in the production line equipment, the detection device is installed with a thickness detection module and an image detection module, which are used to detect the copper foil before and after coating; the detection device includes: The device body is located in the production line equipment, and a balancing roller is connected to the device body for uniform rotation; a rotating belt is provided at one end of the device body, and the rotating belt is respectively located at the upper and lower parts of the copper foil, and a plurality of driving rollers are sleeved in the rotating belt, and the driving rollers are in close contact with the rotating belt; A rotating tube, which is arranged in the main body of the device and is connected to a driving device arranged in the main body of the device, a rotating wheel is evenly sleeved on the rotating tube, a guide plate is provided near the rotating wheel at the part of the main body of the device, a part of the rotating belt near the guide plate is arched, the rotating wheel is located in the arched part of the rotating belt, and the rotating direction of the rotating wheel is opposite to that of the rotating belt; pressure wheels are rotatably connected on both sides of the guide plate, and each upper and lower pressure wheels contact the edge of the copper foil; cleaning cotton is provided on the surface of the rotating belt to contact the copper foil, and absorbent cotton is provided on the surface of the rotating wheel to contact the copper foil; a collecting tank is provided in the main body of the device, and a side of the collecting tank close to the rotating belt contacts the cleaning cotton, a storage tank containing a cleaning solution is provided on one side of the collecting tank, the bottom of the storage tank contacts and is wetted by the cleaning cotton, and a camera assembly is provided at the bottom of the collecting tank.

[0005] Preferably, the rotating belt is composed of a plurality of endless belts, and the driving roller drives the plurality of endless belts to move simultaneously along a fixed rotating path, each endless belt contacts the copper foil through a separately arranged cleaning cotton, and the plurality of endless belts and the cleaning cotton form a plurality of cleaning channels contacting the copper foil; a plurality of compartments are arranged in the lower half of the storage tank, and each stores a different agent, a connecting pipe is arranged at the bottom of the storage tank away from the collecting tank, each compartment is connected to the connecting pipe through an electromagnetic valve, and the connecting pipe contacts the cleaning cotton; an electric telescopic rod is installed on the inner wall of the main body of the device, and one end of the electric telescopic rod is connected to the connecting pipe; when there are impurities in the first cleaning channel on the copper foil, the electric telescopic rod moves to the corresponding cleaning channel position, and the connecting pipe will infuse the corresponding agent into the corresponding cleaning cotton through the electromagnetic valve.

[0006] Preferably, a cross bar is fixedly connected to the inner wall of the device body, and a plurality of vertical bars are slidably connected to the cross bar through springs, and the vertical bars, rotating wheels, and ring belts correspond to each other one by one; a lifting groove is opened in the rotating wheel, and a rotating tube passes through the lifting groove, and the surface of the rotating tube contacts the inner wall of one end of the lifting groove, and a slider is slidably connected to the middle part of the lifting groove through a spring, and the sliders are symmetrically distributed, and the two sliders are combined to divide one lifting groove into two circular holes, and the rotating tube is located in one of the circular holes; the bottom of the vertical bar is concave, and the rotating wheel is rotatably connected to the vertical bar, and the concave part of the bottom of the vertical bar is located between the surface of the rotating wheel and the groove; an electromagnet is installed on the vertical bar, and the electromagnet is close to the cross bar.

[0007] Preferably, an L-shaped guide plate is provided on one side of the cross bar away from the rotating wheel, and the top of the guide plate contacts the cleaning cotton, and the bottom is inclined.

[0008] Preferably, the cross bar is located at a position where the rotating wheel is away from the storage tank and is close to the copper foil; the vertical bar is hook-shaped, and the hook part of the vertical bar is away from the copper foil and connected to the rotating wheel; a groove is opened on one side of the cross bar, and the opening of the groove contacts the absorbent cotton, and the groove is connected to the bottom of the guide plate.

[0009] Preferably, a water pipe is installed in the main body of the device, and one end of the water pipe is connected to the interior of the upper half of the storage tank, and the other end is located on the side of the vertical rod close to the groove, and one end of the water pipe points to the absorbent cotton.

[0010] Preferably, airbags are evenly arranged on the surface of the rotating wheel, and the airbags are located inside the absorbent cotton, and the air outlets of the airbags point to the inside of the absorbent cotton.

[0011] Preferably, a square tube is provided between the collecting trough and the storage tank, and the square tube is closed in the middle and open at both ends. The upper opening of the square tube contacts the cleaning cotton and the endless belt, and the lower opening is close to the copper foil. The camera assembly is located between the square tube and the storage tank, and the end of the square tube away from the collecting trough is connected to the suction pipe in the production line equipment.

[0012] Preferably, a sticky roller is rotatably connected to the top of the inner wall of the square tube, and the surface of the sticky roller contacts the cleaning cotton.

[0013] Preferably, a storage box is installed at one end of the device body away from the rotating belt, and the storage box is used for winding and unwinding the copper foil.

[0014] The beneficial effects of the present invention are as follows: 1. In the device for detecting the coating thickness of the lithium battery copper foil described in the present invention, when the rotating belt carries the cleaning cotton and rotates through the bottom of the storage tank, it is wetted by the cleaning agent in the storage tank, and the rotating belts located on the upper and lower sides of the copper foil simultaneously drive the cleaning cotton to contact the copper foil, so that the copper foil is supported in the upper and lower directions when being cleaned, avoiding the situation where the copper foil itself is squeezed and deformed during cleaning due to its thinness, thereby increasing the protection measures for the copper foil. The copper foil is protected during the cleaning process, so that the copper foil can be cleaned faster, the cleaning efficiency is improved, the copper foil is accelerated to enter the detection, and the detection efficiency of the copper foil is improved.

[0015] 2. The lithium battery copper foil coating film thickness detection device described in the present invention has pressure wheels located on the upper and lower sides of the copper foil, which squeeze the edge of the copper foil so that the pressure wheels roll when the copper foil moves. Workers detect the rotation speed of the pressure wheels through conventional sensors, thereby detecting the actual moving speed of the copper foil. Workers set the rotation speed of the rotating belt based on the actual moving speed of the copper foil, thereby ensuring that the moving speeds of the copper foil and the cleaning cotton can match each other. For example, if the moving speed of the cleaning cotton is slightly greater than the moving speed of the copper foil, the copper foil can be effectively cleaned while increasing the degree of protection of the copper foil surface, thereby improving the cleaning effect and improving the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 is a schematic diagram of the present invention located in a production line device; Figure 2 It is a state diagram of the copper foil detected by the present invention; Figure 3 It is a schematic diagram of the distribution of annuli in the rotational belt; Figure 4 is a schematic diagram of the collection tank; Figure 5 This is a state diagram of the medicine inside the storage tank being transported to the cleaning cotton; Figure 6 It is a schematic diagram of the guide plate guiding the rotating belt to be arched; Figure 7 is a stereogram of the guide plate; Figure 8 It is a schematic diagram of the wheel rotating at the bottom of the vertical rod; Fig. 9 This is the state diagram when the vertical rod drives the wheel to rise.

[0018] In the figure: device body 1, balancing roller 11, thickness detection module 12, image detection module 13, rotating belt 2, driving roller 21, rotating tube 22, rotating wheel 23, guide plate 24, pressure wheel 25, cleaning cotton 26, absorbent cotton 27, collecting tank 3, storage tank 31, camera assembly 32, endless belt 33, compartment 34, connecting pipe 35, electric telescopic rod 36, cross bar 4, vertical rod 41, lifting groove 42, slider 43, electromagnet 44, guide plate 45, groove 46, water pipe 47, air bag 48, square tube 5, sticky roller 51, storage box 52. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] Embodiment 1:

[0021] Lithium battery copper foil coating film thickness detection device, as shown in the attached figure of the specification Figure 1-Figure 9 As shown, the detection device is installed in the production line equipment, and the production line equipment includes a feed end, a coating end and a discharge end. The detection device is installed at the feed end and the discharge end respectively. The detection device is installed with a thickness detection module 12 and an image detection module 13 for detecting the copper foil before and after coating; the detection device includes: The device body 1 is located in the production line equipment, and a balancing roller 11 is connected to the device body 1 for uniform rotation; a rotating belt 2 is provided at one end of the device body 1, and the rotating belt 2 is respectively located at the upper and lower parts of the copper foil, and a plurality of driving rollers 21 are sleeved in the rotating belt 2, and the driving rollers 21 are in close contact with the rotating belt 2; both ends of the driving roller 21 close to the copper foil are fixedly connected with a pressing wheel 25, and each upper and lower pressing wheel 25 contacts the edge of the copper foil; A rotating tube 22, the rotating tube 22 is arranged in the device body 1, and the rotating tube 22 is connected to the driving device arranged in the device body 1, and a rotating wheel 23 is evenly sleeved on the rotating tube 22, and a guide plate 24 is provided at a position of the device body 1 near the rotating wheel 23, and the position of the rotating belt 2 near the guide plate 24 is arched, and the rotating wheel 23 is located in the arched position of the rotating belt 2, and the rotating wheel 23 rotates in the opposite direction to the rotating belt 2; both sides of the guide plate 24 are rotatably connected with pressure wheels 25, and each upper and lower pressure wheels 25 contact the edge of the copper foil; the surface of the rotating belt 2 is provided with a cleaning cotton 26 to contact the copper foil, and the surface of the rotating wheel 23 is provided with a water-absorbing cotton 27 to contact the copper foil; the cross-section of the rotating belt 2 is triangular, and the top of the rotating belt 2 is far away from the rotating wheel 23; a collecting tank 3 is provided in the device body 1, and the side of the collecting tank 3 near the rotating belt 2 contacts the cleaning cotton 26, and a storage tank 31 containing a cleaning solution is provided on one side of the collecting tank 3, and the bottom of the storage tank 31 contacts and wets the cleaning cotton 26, and a camera assembly 32 is provided at the bottom of the collecting tank 3; The balancing roller 11 is a conventional component used to play a balancing role. When the copper foil passes through the thickness detection module 12 and the image detection module 13, the balancing roller 11 is used to achieve the detection requirement of keeping the copper foil detection area balanced; the driving roller 21 is a conventional device that is electrically driven to rotate, and is commonly used for the rotation of the conveyor belt; the driving device is a conventional electrical appliance, such as a motor; the cleaning cotton 26 and the absorbent cotton 27 are conventional tools for cleaning the copper foil, and the copper foil is cleaned with a conventional cleaning solution; the camera assembly 32 is a conventional shooting device for shooting the surface of the copper foil at close range, including a camera and a spotlight, and the shooting accuracy of the camera assembly 32 is less than the shooting accuracy of the detection module, and is used to pre-shoot impurities on the copper foil before detection; System hardware and software design in detection device The system consists of a processor, an image monitoring module, a data transmission display module, an alarm module, and a thickness measurement module. During the inspection process, the production line has the characteristics of fast material transmission speed, high quality control requirements, and long duration. The device monitors the product input and output status in real time through sensors and image lenses installed above and below the production line process inspection, and transmits the data to the computer display screen in the monitoring room, so that the test staff can monitor the real-time status of each monitoring point of the product production line in real time. When an abnormal overvalue or defect occurs at a monitoring point during the production process, the system will quickly execute an automatic sound and light alarm and actively shut down. Thickness detection module 12 This method uses a laser beam to illuminate the object to be measured at a certain incident angle. The laser is reflected and scattered on the surface of the object. The reflected light is focused by the lens and imaged on the CCD position sensor. When the object to be measured moves along the direction of the laser, the light spot on the position sensor will move. Image detection module 13 (CCD image sensor lens) Contrast detection: focusing is done directly by the photosensitive element, no additional components are required, image quality is not affected, there is no risk of focus deviation, and focus can be achieved at any position in the entire image; however, it generally has the disadvantage of being slow, because the focusing process is highly dependent on the photosensitive element, and the speed at which the photosensitive element transmits images back has a great impact on the focusing speed; Phase detection: It is an autofocus system used by SLR digital cameras when shooting with a viewfinder. The principle is to split the light entering the lens into two, thus forming two images; based on the difference between the focus positions of the two images, the direction and amount of lens movement are calculated to complete the focus and move the lens accordingly; since the actual measurement is not the light reaching the photosensitive element, there is a risk of out-of-focus; independent AF modules can only provide a limited number of focuses; These two methods are used in combination to meet different shooting needs for copper foil inspection.

[0022] Specific work flow: When the copper foil is inspected in real time, data records are formed and stored after processing and image display, and the thickness, surface, etc. of the coated copper foil are inspected. The inspected data value and image are compared with the set data value and image. If an abnormality is found, an alarm is given to the production line equipment and the machine is shut down. Before the inspection, the aluminum foil is first cleaned by the rotating belt 2 to prevent impurities on the surface of the aluminum foil from being misjudged as defects and causing abnormal conditions, leading to alarms and shutdowns. The driving roller 21 drives the rotating belt 2 to rotate. When the rotating belt 2 passes through the guide plate 24, it is guided by the guide plate 24, so that the part of the rotating belt 2 close to the rotating wheel 23 is bent upward. The arch passes over the rotating wheel 23, so that the cleaning cotton 26 does not contact the absorbent cotton 27; when the rotating belt 2 carries the cleaning cotton 26 and rotates through the bottom of the storage tank 31, it is wetted by the cleaning agent in the storage tank 31, and the rotating belt 2 located on the upper and lower sides of the copper foil drives the cleaning cotton 26 to contact the copper foil at the same time, so that the copper foil is supported in the upper and lower directions when being cleaned, avoiding the situation that the copper foil itself is thin and is squeezed and deformed during cleaning, increasing the protection measures for the copper foil, and the copper foil is protected during the cleaning process, so that the copper foil can be cleaned faster, improve the cleaning efficiency, speed up the copper foil to enter the inspection, and improve the inspection efficiency of the copper foil; In addition, the pressing wheels 25 located on the upper and lower sides of the copper foil squeeze the edge of the copper foil so that the copper foil moves and drives the pressing wheels 25 to roll. The worker detects the rotation speed of the pressing wheel 25 through a conventional sensor, thereby detecting the actual moving speed of the copper foil. The worker sets the rotation speed of the rotating belt 2 based on the actual moving speed of the copper foil to avoid the cleaning cotton 26 moving too fast from contacting the copper foil moving too slowly, resulting in the copper foil being subjected to rapid friction for a long time, thereby ensuring that the moving speeds of the copper foil and the cleaning cotton 26 can match each other, such as the moving speed of the cleaning cotton 26 is slightly greater than the moving speed of the copper foil, so that the copper foil is effectively cleaned while increasing the degree of protection of the copper foil surface, improving the cleaning effect, and thus improving the accuracy of the detection; in addition, when the copper foil is cut and used, its edge is a conventional wear part and needs to be cut and removed; therefore, the squeezing of the pressing wheel 25 does not affect the use of the entire copper foil; When the camera assembly 32 identifies that there are many impurities or abnormalities on the surface of the copper foil, a variety of methods are used to clean it, for example: When there are many impurities, the moving speed of the rotating belt 2 is slightly faster or slower than the moving speed of the copper foil, and the rotating belt 2 wipes and cleans the surface of the copper foil through the cleaning cotton 26; When impurities are abnormal, such as granular impurities, if they are wiped by the rotating belt 2, the granular impurities may slide on the surface of the copper foil and damage the copper foil; therefore, the worker sets the copper foil and the rotating belt 2 to move at the same speed, so that the wetted cleaning cotton 26 and the copper foil keep moving synchronously, and fully wet the granular impurities and other difficult-to-clean impurities on the surface of the copper foil; then the cleaning cotton 26 moves away from the copper foil when passing through the guide plate 24, and the driving device drives the rotating tube 22 to rotate, and the rotating tube 22 drives the absorbent cotton 27 to rotate and contact the copper foil through the rotating wheel 23. Since the rotating wheel 23 rotates in opposite directions to the rotating belt 2, the absorbent cotton 27 wipes and removes the impurities on the copper foil in the opposite direction, avoiding the situation where the absorbent cotton 27 moves in the same direction as the copper foil and squeezes the impurities to the surface of the copper foil to form a depression; By cleaning in the above manner, the detection device can formulate the surface condition of the copper foil, improve the cleaning effect of the copper foil surface, reduce the influence of impurities on the detection results, reduce the misjudgment rate, and improve the detection accuracy; moreover, after shooting, the camera component 32 will mark the area of ​​the copper foil, so that after the detection module detects, it will attract the attention of the workers to conduct a detailed inspection to see if the impurities in the area are clean. If not, it is determined to be a defect; and for the copper foil surface without abnormalities, it is determined which area needs to be inspected in detail by means of marking guidance, which improves the convenience of use; The rotating belt 2 drives the cleaning cotton 26 to pass through the collecting groove 3. The collecting groove 3 scrapes the cleaning cotton 26 to squeeze out the water in the cleaning cotton 26. At the same time, the impurities wiped off by the cleaning cotton 26 are cleaned together with the discharge of water, thereby maintaining the cleanliness of the cleaning cotton 26 and avoiding contamination.

[0023] Embodiment 2:

[0024] On the basis of the first embodiment, the rotating belt 2 is composed of a plurality of endless belts 33, and the driving roller 21 drives the plurality of endless belts 33 to move simultaneously along a fixed rotating path, each endless belt 33 contacts the copper foil through a separately arranged cleaning cotton 26, and the plurality of endless belts 33 and the cleaning cotton 26 form a plurality of cleaning channels contacting the copper foil; a plurality of compartments 34 are arranged in the lower half of the storage tank 31, and each stores a different agent, and a connecting pipe 35 is arranged at the bottom of the storage tank 31 away from the collecting tank 3, each compartment 34 is connected to the connecting pipe 35 through an electromagnetic valve, and the connecting pipe 35 contacts the cleaning cotton 26; an electric telescopic rod 36 is installed on the inner wall of the device body 1, and one end of the electric telescopic rod 36 is connected to the connecting pipe 35; when there are impurities in the first cleaning channel on the copper foil, the electric telescopic rod 36 moves to the corresponding cleaning channel position, and the connecting pipe 35 will infuse the corresponding agent into the corresponding cleaning cotton 26 through the electromagnetic valve; the electric telescopic rod 36 is a conventional electric telescopic device; A cross bar 4 is fixedly connected to the inner wall of the device body 1, and a plurality of vertical rods 41 are slidably connected to the cross bar 4 through springs, and the vertical rods 41, the rotating wheel 23, and the ring belt 33 correspond to each other one by one; a lifting groove 42 is provided in the rotating wheel 23, and the rotating tube 22 passes through the lifting groove 42, and the surface of the rotating tube 22 contacts the inner wall of one end of the lifting groove 42, and a slider 43 is slidably connected to the middle part of the lifting groove 42 through a spring, and the sliders 43 are symmetrically distributed, and the two sliders 43 are combined to separate one lifting groove 42 into two circular holes, and the rotating tube 22 is located in one of the circular holes; the bottom of the vertical rod 41 is concave, and the rotating wheel 23 is rotatably connected to the vertical rod 41, and the concave part of the bottom of the vertical rod 41 is located between the surface of the rotating wheel 23 and the groove 46; an electromagnet 44 is installed on the vertical rod 41, and the electromagnet 44 is close to the cross bar 4; the parts of the vertical rod 41 and the cross bar 4 away from the electromagnet 44 are subjected to magnetic isolation treatment to prevent the on and off of the electromagnet 44 from affecting the normal operation of the components; An L-shaped guide plate 45 is provided on one side of the cross bar 4 away from the rotating wheel 23, and the top of the guide plate 45 contacts the cleaning cotton 26, and the bottom is inclined; The cross bar 4 is located at a position where the rotating wheel 23 is away from the storage tank 31, and the cross bar 4 is close to the copper foil; the vertical rod 41 is hook-shaped, and the hook part of the vertical rod 41 is away from the copper foil and connected to the rotating wheel 23; a groove 46 is opened on one side of the cross bar 4, and the opening of the groove 46 contacts the absorbent cotton 27, and the groove 46 is connected to the bottom of the guide plate 45.

[0025] Specific working process: the driving roller 21 drives the endless belt 33 to rotate, and the endless belt 33 drives the cleaning cotton 26 to rotate. One endless belt 33, the cleaning cotton 26, the rotating wheel 23 and the absorbent cotton 27 correspond to one cleaning channel; when there are impurities in the first cleaning channel on the copper foil, the electric telescopic rod 36 is started, driving the connecting tube 35 to move to the first cleaning channel position, one end of the connecting tube 35 contacts the cleaning cotton 26 belonging to the first cleaning channel, and the detection device opens the electromagnetic valve of the corresponding cleaning agent according to the type of impurities, such as the agent for softening impurities, the agent for cleaning oily impurities, etc., and the agent in the compartment 34 is transported into the cleaning cotton 26 through the connecting tube 35; then, the cleaning cotton 26 moves together with the copper foil, so that the agent in the cleaning cotton 26 contacts the impurities for a long time, producing a cleaning effect, and is wiped away with the rotation of the absorbent cotton 27, so as to achieve the purpose of using different agents to clean different types of impurities, improve the cleaning effect, thereby improving the cleaning degree of the copper foil surface, and then improving the detection accuracy; Moreover, when the cleaning cotton 26 contacts the reagent in the compartment 34, it is wetted by the conventional cleaning reagent stored in the upper part of the storage tank 31 in advance, so that the concentration of the reagent in the cleaning cotton 26 is reduced, and the high concentration reagent is prevented from contacting the copper foil and causing corrosion to the surface of the copper foil; moreover, the cleaning reagent in the upper part of the storage tank 31 can be a volatile conventional cleaning agent, so as to avoid excessive water residue and affect the inspection of the copper foil; Furthermore, when the surface of the copper foil is dusty or relatively clean, the electromagnet 44 is powered off, the vertical rod 41 rises, driving the electromagnet 44 away from the horizontal rod 4, while driving the rotating wheel 23 and the absorbent cotton 27 to rise; while the rotating tube 22 is fixed, the rotating tube 22 squeezes the slider 43 in the lifting groove 42 and retracts into the inner wall of the lifting groove 42 until the rotating tube 22 passes over the slider 43, so that the slider 43 is located above the rotating tube 22, that is, the two sliders 43 merge to divide one lifting groove 42 into two circular holes, and the rotating tube 22 is located in one of them. In the circular hole, the rotating wheel 23 rises, and the rotating tube 22 slides from the first circular hole into the second circular hole. The rotating tube 22 is away from the center of the rotating wheel 23, and the rotating wheel 23 is restricted by the rotation connection of the vertical rod 41, so that the rotating tube 22 cannot drive the rotating wheel 23 to rotate, and it is stationary at a position away from the copper foil; at this time, the absorbent cotton 27 is away from the copper foil, and the surface of the copper foil is cleaned only by the cleaning cotton 26, while ensuring the cleaning effect, avoiding the damage caused by excessive cleaning friction, improving the cleaning effect, and thus improving the detection accuracy; When there are impurities on the copper foil, according to the cleaning channel where the impurities are photographed, the detection device controls the corresponding electromagnet 44 to be energized, and the electromagnet is energized to absorb the horizontal bar 4, driving the vertical bar 41 to descend, and the vertical bar 41 descends to drive the rotating wheel 23 and the absorbent cotton 27 to descend to contact the copper foil, and the rotating tube 22 returns from the second circular hole to the first circular hole. At this time, the rotating tube 22 is located at the center of the rotating wheel 23, and the rotating tube 22 can drive the rotating wheel 23 to rotate. The rotating wheel 23 wipes the impurities in a certain area on the copper foil through the absorbent cotton 27, so as to achieve the purpose of targeted cleaning of the area, further avoid the damage caused by excessive cleaning friction, improve the cleaning effect, and thus improve the detection accuracy; Moreover, when the cleaning cotton 26 passes through the guide plate 45, the cleaning cotton 26 is squeezed and scratched by the top of the guide plate 45, so that the medicine in the cleaning cotton 26 is squeezed out together with the dust, flows along the guide plate 45 to the bottom, and is guided by the inclined part of the bottom of the guide plate 45 to move toward the side wall of the production line equipment, so that the medicine squeezed out of the cleaning cotton 26 is discharged from the copper foil, so as to achieve the purpose of washing the cleaning cotton 26 multiple times, thereby improving the cleaning ability of the cleaning cotton 26, and, when the cleaning cotton 26 is squeezed, it can be supported by the guide plate 24, so as to increase the support degree of the cleaning cotton 26 when squeezed, and improve the squeezing and drying degree of the cleaning cotton 26; in addition, after the cleaning cotton 26 is squeezed dry, it passes over the guide plate 24 and contacts the copper foil again, and the squeezed and dried cleaning cotton 26 absorbs the moisture on the copper foil, reduces the residual moisture on the copper foil, and avoids the medicine leaving water stains on the copper foil, which affects the detection work, thereby improving the cleaning effect of the copper foil, and further improving the detection accuracy of the copper foil; When the rotating wheel 23 is stationary, the rotating wheel 23 drives the absorbent cotton 27 to rise and away from the groove 46; when the rotating wheel 23 is cleaning, the rotating wheel 23 drives the absorbent cotton 27 to descend and contact the groove 46. After cleaning the copper foil, the absorbent cotton 27 rotates through the groove 46. The groove 46 scratches and squeezes the absorbent cotton 27, and the medicine and impurities in the absorbent cotton 27 are discharged together, thereby improving the cleaning degree of the absorbent cotton 27, maintaining the cleaning ability of the absorbent cotton 27, and avoiding the particulate impurities in the absorbent cotton 27 from being damaged by the copper foil due to the failure to be discharged in time; and the squeezed absorbent cotton 27 can also cooperate with the squeezed cleaning cotton 26 to absorb moisture from the copper foil together, thereby accelerating the drying effect.

[0026] Embodiment three:

[0027] On the basis of the second embodiment, a water pipe 47 is installed in the device body 1, and one end of the water pipe 47 is connected to the interior of the upper half of the storage tank 31, and the other end is located on the side of the vertical rod 41 close to the groove 46, and one end of the water pipe 47 points to the absorbent cotton 27; the water pipe 47 is connected to the interior of the upper half of the storage tank 31 through a conventional solenoid valve that controls the on-off of the pipeline; The surface of the rotating wheel 23 is evenly provided with air bags 48 , and the air bags 48 are located inside the water-absorbing cotton 27 , and the air outlets of the air bags 48 point to the inside of the water-absorbing cotton 27 .

[0028] Specific working process: when the rotating wheel 23 cleans the copper foil through the absorbent cotton 27, the electromagnetic valve inside the upper part of the storage tank 31 is opened, and the cleaning solution inside the upper part of the storage tank 31 flows to the top of the rotating wheel 23 through the water pipe 47, and the cleaning solution is dripped from the top of the rotating wheel 23 near the cross bar 4 to fully wet the cleaned absorbent cotton 27. The absorbent cotton 27 absorbs water and expands, and then shrinks through the squeezing of the groove 46. On the one hand, the absorbent cotton 27 is cleaned by absorbing water and squeezing water, so as to achieve the purpose of removing the medicine in the compartment 34, reduce the residual medicine, and avoid the influence of the residual medicine of the absorbent cotton 27 on the cleaning work; on the other hand, the water content in the absorbent cotton 27 is increased, so that when the absorbent cotton 27 is squeezed, there can be enough water to take the granular impurities away from the absorbent cotton 27, thereby improving the cleaning degree of the absorbent cotton 27, thereby improving the cleaning effect of the copper foil, and then improving the detection accuracy; By providing the airbag 48, when the absorbent cotton 27 is squeezed by the groove 46, the airbag 48 is also squeezed, and the gas in the airbag 48 is discharged from the inside to the outside through the absorbent cotton 27. Combined with the effect of squeezing water from the inside to the outside when the absorbent cotton 27 is squeezed, it is further ensured that when the absorbent cotton 27 is squeezed, there is sufficient water to remove the particulate impurities from the absorbent cotton 27, thereby improving the cleanliness of the absorbent cotton 27, thereby improving the cleaning effect of the copper foil, and further improving the detection accuracy; and, after passing through the groove 46, the airbag 48 elastically recovers, sucks air into the absorbent cotton 27, absorbs the residual agent in the absorbent cotton 27, and improves the dryness of the absorbent cotton 27, thereby improving the ability of the absorbent cotton 27 to absorb moisture on the copper foil while cleaning, accelerating the drying of the copper foil, and further accelerating the detection efficiency of the copper foil.

[0029] Embodiment 4:

[0030] On the basis of the third embodiment, a square tube 5 is provided between the collecting tank 3 and the storage tank 31, and the square tube 5 is closed in the middle and opened at the upper and lower ends. The upper end opening of the square tube 5 contacts the cleaning cotton 26 and the endless belt 33, and the lower end opening is close to the copper foil. The camera assembly 32 is located between the square tube 5 and the storage tank 31, and the end of the square tube 5 away from the collecting tank 3 is connected to the suction pipe in the production line equipment; the suction pipe in the production line equipment is a conventional equipment device for realizing suction work; The top of the inner wall of the square tube 5 is rotatably connected with a sticky roller 51, and the surface of the sticky roller 51 contacts the cleaning cotton 26; the sticky roller 51 is a conventional sticky part, which is used for adhesion, and the sticky material on the sticky roller 51 will not transfer to the surface of the cleaning cotton 26 that has been adhered, so as to avoid the cleaning cotton 26 being affected; A storage box 52 is installed at one end of the device body 1 away from the rotating belt 2, and the storage box 52 is used for winding and unwinding copper foil; the storage box 52 is a conventional device for winding and unwinding copper foil.

[0031] Specific working process: the cleaning cotton 26 contacts the copper foil for a longer time than the absorbent cotton 27, so it is more necessary to keep the cleaning cotton 26 clean; when the cleaning cotton 26 passes through the upper opening of the square tube 5, the collecting tank 3 squeezes out the water in the cleaning cotton 26, and the square tube 5 sucks the cleaning cotton 26 to remove the dust remaining on the cleaning cotton 26, thereby improving the cleanliness of the cleaning cotton 26 and thus improving the cleaning effect of the copper foil; when the copper foil passes through the lower opening of the square tube 5, the lower opening of the square tube 5 sucks the surface of the copper foil to reduce the attachment of dust and avoid the long-term movement and friction of the copper foil to generate static electricity to absorb too much dust, thereby affecting the detection work, thereby improving the cleanliness of the copper foil surface and further improving the detection accuracy of the copper foil; In addition, one side of the camera assembly 32 is shielded from external light sources by the square tube 5, and the other side is shielded from external light sources by the rotating belt 2, while the camera assembly 32 is illuminated by an internal spotlight, thereby improving the image quality of the initial inspection by the camera assembly 32 before detection, avoiding the influence of external light sources on the shooting and identification of impurities on the surface of the copper foil, improving the cleaning effect, and thus improving the detection accuracy; After being sucked by the square tube 5, the cleaning cotton 26 further improves its own dryness. At this time, the cleaning cotton 26 contacts the sticky roller 51 when passing through the inner wall of the square tube 5. The sticky roller 51 adheres to the surface of the cleaning cotton 26, further removing dust on the cleaning cotton 26 and improving the cleanliness of the cleaning cotton 26. After the copper foil is inspected, it is stored in the storage box 52, and then transported to the coating area in the production line equipment via the storage box 52 for coating. When the copper foil is detected to be abnormal, measures need to be taken to process the copper foil. At this time, the copper foil stored in the storage box 52 can continue to be transported to the coating area in the production line equipment, thereby reducing unnecessary shutdown times and improving practicality. In addition, the copper foil stored in the storage box 52 can leave a detection margin for the detection device, that is, if a certain area of ​​the copper foil is detected to be abnormal, but this area of ​​the copper foil has passed the detection device, by setting up the storage box 52, the copper foil can be moved in the opposite direction to the position for manual inspection and processing, thereby facilitating the processing of the copper foil problem area and improving the convenience of use.

Claims

1. A device for detecting the coating thickness of a lithium battery copper foil, the device being installed in a production line device, wherein a thickness detection module (12) and an image detection module (13) are installed in the device for detecting the copper foil before and after coating; characterized in that: The detection device comprises: The device body (1) is located in the production line equipment, and a balancing roller (11) is connected to the device body (1) for uniform rotation; a rotating belt (2) is provided at one end of the device body (1), the rotating belt (2) is respectively located at the upper and lower parts of the copper foil, and a plurality of driving rollers (21) are sleeved in the rotating belt (2), and the driving rollers (21) are in close contact with the rotating belt (2); A rotating tube (22) is arranged in the device body (1), and the rotating tube (22) is connected to a driving device arranged in the device body (1). A rotating wheel (23) is evenly sleeved on the rotating tube (22). A guide plate (24) is arranged near the rotating wheel (23) of the device body (1). The portion of the rotating belt (2) near the guide plate (24) is arched. The rotating wheel (23) is located in the arched portion of the rotating belt (2). The rotating direction of the rotating wheel (23) is opposite to that of the rotating belt (2). Both sides of the guide plate (24) are rotatably connected to pressure wheels (2 5), and each upper and lower pressing wheels (25) contact the edge of the copper foil; the surface of the rotating belt (2) is provided with cleaning cotton (26) to contact the copper foil, and the surface of the rotating wheel (23) is provided with absorbent cotton (27) to contact the copper foil; a collecting tank (3) is provided in the main body (1) of the device, and the side of the collecting tank (3) close to the rotating belt (2) contacts the cleaning cotton (26), one side of the collecting tank (3) is provided with a storage tank (31) containing a cleaning solution, the bottom of the storage tank (31) contacts and is wetted with the cleaning cotton (26), and a camera assembly (32) is provided at the bottom of the collecting tank (3).

2. The lithium battery copper foil coating film thickness detection device according to claim 1 is characterized in that: The rotating belt (2) is composed of a plurality of endless belts (33), and the driving roller (21) drives the plurality of endless belts (33) to move simultaneously along a fixed rotating path, each endless belt (33) contacts the copper foil through a separately arranged cleaning cotton (26), and the plurality of endless belts (33) and the cleaning cotton (26) form a plurality of cleaning channels to contact the copper foil; a plurality of compartments (34) are arranged in the lower part of the storage tank (31), and each compartment stores a different medicine, and a connecting pipe is arranged at the bottom of the storage tank (31) away from the collecting tank (3) (35), each compartment (34) is connected to a connecting pipe (35) through an electromagnetic valve, and the connecting pipe (35) contacts the cleaning cotton (26); an electric telescopic rod (36) is installed on the inner wall of the device body (1), and one end of the electric telescopic rod (36) is connected to the connecting pipe (35); when there are impurities in the first cleaning channel on the copper foil, the electric telescopic rod (36) moves to the corresponding cleaning channel position, and the connecting pipe (35) will inject the corresponding agent into the corresponding cleaning cotton (26) through the electromagnetic valve.

3. The lithium battery copper foil coating film thickness detection device according to claim 2 is characterized in that: A cross bar (4) is fixedly connected to the inner wall of the device body (1), and a plurality of vertical bars (41) are slidably connected to the cross bar (4) via springs, and the vertical bars (41), the rotating wheel (23), and the ring belt (33) correspond to each other one by one; a lifting groove (42) is provided in the rotating wheel (23), and the rotating tube (22) passes through the lifting groove (42), the surface of the rotating tube (22) contacts the inner wall of one end of the lifting groove (42), and a sliding block (43) is slidably connected to the middle part of the lifting groove (42) via a spring. The sliders (43) are symmetrically distributed, and the two sliders (43) are combined to separate a lifting slot (42) into two circular holes, and the rotating tube (22) is located in one of the circular holes; the bottom of the vertical rod (41) is concave, and the rotating wheel (23) is rotatably connected to the vertical rod (41), and the concave part of the bottom of the vertical rod (41) is located between the surface of the rotating wheel (23) and the groove (46); an electromagnet (44) is installed on the vertical rod (41), and the electromagnet (44) is close to the cross bar (4).

4. The lithium battery copper foil coating film thickness detection device according to claim 3 is characterized in that: An L-shaped guide plate (45) is provided on one side of the cross bar (4) away from the rotating wheel (23), and the top of the guide plate (45) contacts the cleaning cotton (26), and the bottom is inclined.

5. The lithium battery copper foil coating film thickness detection device according to claim 4, characterized in that: The cross bar (4) is located at a position where the rotating wheel (23) is far away from the storage tank (31), and the cross bar (4) is close to the copper foil; the vertical bar (41) is hook-shaped, and the hook portion of the vertical bar (41) is far away from the copper foil and connected to the rotating wheel (23); a groove (46) is provided on one side of the cross bar (4), and the opening of the groove (46) contacts the absorbent cotton (27), and the groove (46) is connected to the bottom of the guide plate (45).

6. The lithium battery copper foil coating film thickness detection device according to claim 5, characterized in that: A water pipe (47) is installed in the device body (1), and one end of the water pipe (47) is connected to the interior of the upper half of the storage tank (31), and the other end is located on a side of the vertical rod (41) close to the groove (46), and one end of the water pipe (47) points to the absorbent cotton (27).

7. The lithium battery copper foil coating film thickness detection device according to claim 6, characterized in that: The surface of the rotating wheel (23) is evenly provided with air bags (48), and the air bags (48) are located inside the water-absorbing cotton (27), and the air outlet of the air bags (48) points to the inside of the water-absorbing cotton (27).

8. The lithium battery copper foil coating film thickness detection device according to claim 2, characterized in that: A square tube (5) is provided between the collecting tank (3) and the storage tank (31), and the square tube (5) is closed in the middle and open at both ends. The upper end opening of the square tube (5) contacts the cleaning cotton (26) and the endless belt (33), and the lower end opening is close to the copper foil. The camera assembly (32) is located between the square tube (5) and the storage tank (31), and one end of the square tube (5) away from the collecting tank (3) is connected to a suction pipe in the production line equipment.

9. The lithium battery copper foil coating film thickness detection device according to claim 8, characterized in that: The top of the inner wall of the square tube (5) is rotatably connected to a sticky roller (51), and the surface of the sticky roller (51) contacts the cleaning cotton (26).

10. The lithium battery copper foil coating film thickness detection device according to claim 1, characterized in that: A storage box (52) is installed at one end of the device body (1) away from the rotating belt (2), and the storage box (52) is used for winding and unwinding the copper foil.

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