Device for eliminating speed difference of back roller of lithium ion battery diaphragm roller coating production line and monitoring horizontal state of back roller

Abstract

The invention discloses a device for eliminating the speed difference of a back roller of a lithium ion battery diaphragm roller coating production line and monitoring the horizontal state of the back roller. The device comprises a back roller rotating speed detecting and adjusting mechanism, a horizontal monitoring mechanism and a protective cover, the back roller rotating speed detecting and adjusting mechanism comprises a servo motor, a control panel, two roller speed velocimeters and a synchronous transmission unit, the two roller speed velocimeters are installed on the two back roller shafts respectively, and the two back roller shafts rotate synchronously through the synchronous transmission unit; the horizontal monitoring mechanism comprises a horizontal marker post and a distance monitoring unit, the horizontal marker post is arranged between the two back rollers, and the distance monitoring unit is used for detecting the distance between the horizontal marker post and the two back rollers; and the protective cover is used for mounting the back roller, the horizontal marker post and components in the protective cover body. According to the invention, the defects of diaphragm cross grains, uneven thickness and the like can be effectively solved, the functions of online monitoring and real-time adjustment of the roller speed of the back roller can be realized, and the lithium battery coating diaphragm with good appearance and consistency can be obtained in the coating process.

Description

Technical Field

[0001] This invention relates to a device for eliminating the speed difference of the back roller in a lithium-ion battery separator roll coating production line and for monitoring the horizontal state of the back roller, belonging to the field of lithium battery separator manufacturing. Background Technology

[0002] In the field of roll coating production lines, the rotational speed and levelness of the back rollers are key parameters that directly affect the coating quality of lithium-ion battery separators. Current roll coating production lines suffer from several common problems: the two back rollers are not level, their rotational speeds are inconsistent, and the rotational speed of the back rollers is not monitored or controlled. The main reason is that the two back rollers are passive rollers with different bearings, and they lack motor control and monitoring devices. Inconsistent rotational speeds and non-levelness of the two back rollers will lead to defects such as horizontal lines and uneven thickness on the coated lithium-ion battery separator surface. These defects directly reduce the quality of the separator, affecting the performance and lifespan of the lithium-ion battery. A solution to the problem of inconsistent roller speeds is mentioned in patent CN202401135U, which involves making the two rollers in direct contact to maintain consistent roller speeds. However, this technology not only fails to meet the requirements of unidirectional rotation of the back rollers and the need for a pre-existing gap between the two back rollers, but also cannot monitor whether the back rollers are level or monitor and adjust their speed.

[0003] There has been relatively little attention paid to the problem of inconsistent and non-horizontal back roller speeds. Therefore, there is an urgent need for an innovative method that can effectively eliminate the speed difference between the two back rollers in the coating production line, monitor the horizontal status of the back rollers, and regulate the speed of the back rollers. Summary of the Invention

[0004] The purpose of this invention is to provide a device for eliminating the speed difference of the back rollers in a lithium-ion battery separator roll coating production line and for monitoring the horizontal state of the back rollers. It can effectively solve the defects such as horizontal lines and uneven thickness caused by the speed difference and non-horizontal state of the two back rollers in the coating production line, and realize the function of online monitoring and real-time adjustment of the back roller speed, so as to ensure that a lithium-ion battery coated separator with good appearance and consistency is obtained during the coating process.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a device for eliminating the speed difference of the back roller in a lithium-ion battery separator roller coating production line and monitoring the horizontal state of the back roller, which includes a back roller speed detection and adjustment mechanism, a horizontal monitoring mechanism and a protective cover;

[0006] The back roller speed detection and adjustment mechanism includes a servo motor, a control panel, two roller speed measuring instruments, and a synchronous transmission unit. The two roller speed measuring instruments are respectively installed on two parallel back roller shafts. The two back roller shafts rotate synchronously through the synchronous transmission unit. The output end of the servo motor is connected to one of the back roller shafts. The control panel is electrically connected to the servo motor and the two roller speed measuring instruments.

[0007] The horizontal monitoring mechanism includes a horizontal marker and a distance monitoring unit. The horizontal marker is set between two back rollers and a horizontal detector is set on the horizontal marker. The distance monitoring unit is set at both ends of the horizontal marker and is used to detect the distance between the horizontal marker and the two back rollers.

[0008] The protective cover is located at both ends of the two back rollers and is used to install the back rollers, the horizontal marker, and the internal components of the protective cover.

[0009] Furthermore, the synchronous transmission unit includes a belt and two gears. The two gears are respectively mounted on two back roller shafts, and the two gears are connected to each other through the belt, which drives the two gears to rotate synchronously.

[0010] Furthermore, the servo motor is connected to one end of the first back roller shaft via a coupling, and the other end of the first back roller shaft is connected to the first back roller, which serves as the drive roller. The first back roller drives the second back roller to rotate together via a synchronous transmission unit.

[0011] Furthermore, a first gear and a second gear are respectively keyed onto the shafts of the first back roller and the second back roller, and the first gear and the second gear are connected by the belt to ensure that the two back rollers operate at the same speed.

[0012] Furthermore, the control panel displays the roller speed and receives speed measurement signals from two roller speed measuring instruments and controls the operation of the servo motor. When the roller speed measured by the roller speed measuring instrument is inconsistent with the production speed, the control panel controls the servo motor to adjust the roller speed.

[0013] Furthermore, if the roller speeds measured by the two roller speed measuring instruments are consistent, it indicates that the belt and the two gear transmission groups are in good condition; if they are inconsistent, it indicates that the belt and the two gear transmission groups are in poor condition, and the control panel will prompt for maintenance.

[0014] Furthermore, the distance monitoring unit includes two bidirectional infrared probes and four annular reflectors. The two bidirectional infrared probes are respectively installed at both ends of the horizontal marker, and the four annular reflectors are respectively installed on the back roller shafts at both ends of the two back rollers. One bidirectional infrared probe corresponds to two annular reflectors. The distance between the two ends of the back rollers and the horizontal marker is detected by the cooperation of the bidirectional infrared probes and the annular reflectors.

[0015] Furthermore, the horizontal marker is provided with adjusting bolts at both ends, which can be used to adjust the horizontal state of the horizontal marker itself.

[0016] Furthermore, the protective cover is divided into two detachable parts, each with flanges at the top and bottom, and the two parts are connected by bolts.

[0017] Furthermore, the inner connection of the protective cover is provided with two reserved holes for the back roller shaft and one reserved hole for the horizontal marker, so that the back roller shaft and the horizontal marker can pass through them to realize loading, unloading and replacement.

[0018] Furthermore, the protective cover has pre-drilled openings on both the front and rear sides, and transparent viewing mirrors are installed in the pre-drilled openings so that operators can observe the status of the belt and gear transmission assembly and the annular reflector at any time.

[0019] Furthermore, bolt holes are provided on the outer edges of the front and rear parts of the protective cover to facilitate its fixation to other mechanisms.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the back roller speed detection and adjustment device can realize the effect of monitoring and adjusting the back roller speed;

[0021] (1) This device can eliminate problems such as poor thickness consistency and horizontal lines on the film surface caused by inconsistent back roller speed and non-horizontal position during the production of lithium-ion battery separators.

[0022] (2) The values ​​detected by the two roller speed measuring instruments in the back roller detection and adjustment device can reflect the rotation speed of the two back rollers, thereby reflecting the state of the belt gear transmission group.

[0023] (3) The horizontal monitoring device can monitor the horizontal status of the two back rollers.

[0024] (4) The protective cover can monitor the horizontal state of the back roller and protect the transmission group and monitoring device.

[0025] (5) The protective cover not only effectively isolates the external environment from the belt drive group and the horizontal condition monitoring device, but also collects the foreign matter generated by belt wear inside the protective cover, preventing belt debris from contaminating the film surface, improving the stability, reliability and monitorability of the roller coating production line, and improving the quality of the coated film.

[0026] (6) The protective cover is easy to disassemble. This easy-to-disassemble design simplifies the cleaning and maintenance operations and improves the maintainability and cleanliness of the equipment.

[0027] (7) The transparent sight glass allows operators to easily monitor the operation of the belt and gear transmission group and the distance detection unit, and can promptly detect and deal with problems, thereby improving the monitorability and production efficiency of the equipment.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the protective cover structure of the present invention;

[0031] Figure 3 This is a cross-sectional view of the internal structure of the protective cover of the present invention.

[0032] The diagram is labeled as follows: 1-Control panel, 2-First back roller shaft, 3-Belt, 4-Protective cover, 5-First annular reflector, 6-First back roller, 7-Third annular reflector, 8-Second infrared probe, 9-Servo motor, 10-Coupling, 11-Second roller speed measuring instrument, 12-First roller speed measuring instrument, 13-Second back roller shaft, 14-Second annular reflector, 15-First infrared probe, 16-First adjusting bolt, 17-Second back roller, 18- Horizontal guide, 19-Second adjusting bolt, 20-Fourth annular reflector, 21-Fixed flange on the protective cover, 22-Upper flange bolt hole, 23-Bolt hole, 24-Reserved opening, 25-Rear transparent sight glass, 26-Reserved hole for the first back roller shaft, 27-Reserved hole for the horizontal guide, 28-Reserved hole for the second back roller shaft, 29-Front transparent sight glass, 30-Fixed flange at the bottom of the protective cover, 31-Lower flange bolt hole, 32-First gear, 33-Second gear. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 3 As shown, a device for eliminating back roller speed difference and monitoring back roller horizontal status in a lithium-ion battery separator roller coating production line is characterized by comprising a back roller speed detection and adjustment mechanism, a horizontal monitoring mechanism, and a protective cover.

[0035] In this embodiment, the back roller speed detection and adjustment mechanism includes a servo motor 9, a control panel 1, a first roller speed measuring instrument 12, a second roller speed measuring instrument 11, and a synchronous transmission unit. The first roller speed measuring instrument 12 and the second roller speed measuring instrument 11 are respectively mounted on two parallel first back roller shafts 2 and second back roller shafts 13. The two back roller shafts rotate synchronously through the synchronous transmission unit, which includes a belt 3, a first gear 32, and a second gear 33. The first gear 32 and the second gear 33 are connected to each other through the belt, which drives the two gears to rotate synchronously. The output end of the servo motor 9 is connected to the first back roller shaft 2, and the control panel 1 is connected to the servo motor 9 and the two roller speed measuring instruments through wires.

[0036] The servo motor 9 is connected to one end of the first back roller shaft via a coupling 10. The other end of the first back roller shaft is connected to the first back roller 6, which serves as the drive roller. The first back roller 6 drives the second back roller 17 to rotate together via a synchronous transmission unit. A first gear 32 and a second gear 33 are respectively keyed onto the shafts of the first back roller 6 and the second back roller 17. The first gear 32 and the second gear 33 are then connected by a belt to ensure that the two back rollers operate at the same speed.

[0037] During the operation of the two back rollers, the control panel 1 displays the roller speed and receives speed measurement signals from two roller speed measuring instruments, as well as controlling the operation of the servo motor 9. When the roller speed measured by the roller speed measuring instrument is inconsistent with the production speed, the control panel controls the servo motor to adjust the roller speed. Simultaneously, if the roller speeds measured by the two roller speed measuring instruments are consistent, it indicates that the belt and the two gear transmission groups are in good condition; if they are inconsistent, it indicates that the belt and the two gear transmission groups are in poor condition, and the control panel prompts for maintenance, thus realizing the function of monitoring the working status of the belt and gear transmission group.

[0038] In this embodiment, the level monitoring mechanism includes a leveling rod 18 and a distance monitoring unit. The leveling rod 18 is disposed between two back rollers, and a level detector is disposed in the middle of the leveling rod 18. Adjusting bolts are also provided at both ends of the leveling rod 18, which can be used to adjust the leveling state of the leveling rod itself. The distance monitoring unit is also disposed at both ends of the leveling rod 18 and is used to detect the distance between the leveling rod and the two back rollers.

[0039] Specifically, the distance monitoring unit includes two bidirectional infrared probes and four annular reflectors: a first infrared probe 15 and a second infrared probe 8, and a first annular reflector 5, a second annular reflector 14, a third annular reflector 7, and a fourth annular reflector 20. The two bidirectional infrared probes are respectively installed at both ends of the horizontal marker, and the four annular reflectors are respectively installed on the back roller shafts at both ends of the two back rollers. Each bidirectional infrared probe corresponds to two annular reflectors. The distance between the two ends of the back rollers and the horizontal marker 18 is detected through the cooperation of the bidirectional infrared probes and the annular reflectors.

[0040] In this embodiment, the protective cover is located at both ends of the two back rollers and is used to install the back rollers, the horizontal marker, and the internal components of the protective cover. The protective cover is divided into two detachable parts, with flanges designed at the top and bottom of each part. Three bolt holes are drilled at equal intervals on the two sets of protruding flanges. The bolts in this direction are easy to disassemble, clean, and maintain, and are not affected by the rollers near the back rollers.

[0041] The inner connection of the protective cover is provided with a first back roller shaft reserved hole 26, a horizontal marker reserved hole 27, and a second back roller shaft reserved hole 28, for the back roller shaft and horizontal marker to pass through, enabling installation, removal, and replacement. Reserved openings are also provided on the front and rear sides of the protective cover, in which a front transparent sight glass and a rear transparent sight glass are respectively installed. The transparent sight glasses serve to prevent dust and belt debris from splashing out, while also allowing for observation of the status of the belt-driven gear assembly. Additionally, bolt holes are provided on the outer edges of the front and rear sections of the protective cover for fixing it to other mechanisms.

[0042] In summary, through the above configuration, this device, with its designed back roller speed detection and adjustment mechanism, level monitoring mechanism, and protective cover, can monitor and control the back roller speed, monitor the back roller's levelness, and protect the transmission assembly and monitoring devices. This device can eliminate problems such as poor thickness consistency and horizontal lines on the film surface caused by inconsistent back roller speeds and non-levelness during lithium-ion battery separator production. Furthermore, the designed easily removable protective cover protects the gear belt drive assembly, is easy to clean, and allows for real-time monitoring of the belt gear drive assembly's status, ensuring stable production of high-quality lithium-ion battery coated separators and thus improving the various performance characteristics of lithium-ion batteries.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the scope of protection of the present invention in any way, and all technical solutions obtained by equivalent substitution or other means fall within the scope of protection of the present invention. Parts not covered in this invention are the same as or can be implemented using existing technology.

Claims

1. A device for eliminating speed difference of the back rollers and monitoring the horizontal state of the back rollers in a lithium-ion battery separator roll coating production line, characterized in that, Includes a back roller speed detection and adjustment mechanism, a level monitoring mechanism, and a protective cover; The back roller speed detection and adjustment mechanism includes a servo motor, a control panel, two roller speed measuring instruments, and a synchronous transmission unit. The two roller speed measuring instruments are respectively installed on two parallel back roller shafts. The two back roller shafts rotate synchronously through the synchronous transmission unit. The output end of the servo motor is connected to one of the back roller shafts. The control panel is electrically connected to the servo motor and the two roller speed measuring instruments. The horizontal monitoring mechanism includes a horizontal marker and a distance monitoring unit. The horizontal marker is set between two back rollers and a horizontal detector is set on the horizontal marker. The distance monitoring unit is set at both ends of the horizontal marker and is used to detect the distance between the horizontal marker and the two back rollers. The protective cover is located at both ends of the two back rollers and is used to install the back rollers, the horizontal marker, and the internal components of the protective cover.

2. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roll coating production line according to claim 1, characterized in that, The synchronous transmission unit includes a belt and two gears. The two gears are respectively mounted on two back roller shafts and are connected to each other through the belt, which drives the two gears to rotate synchronously.

3. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roll coating production line according to claim 1, characterized in that, The servo motor is connected to one end of the first back roller shaft via a coupling, and the other end of the first back roller shaft is connected to the first back roller, which serves as the drive roller. The first back roller drives the second back roller to rotate together via a synchronous transmission unit.

4. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roller coating production line according to claim 3, characterized in that, A first gear and a second gear are respectively keyed onto the shafts of the first back roller and the second back roller, and the first gear and the second gear are connected by the belt to ensure that the two back rollers operate at the same speed.

5. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roller coating production line according to claim 1, characterized in that, The control panel displays the roller speed and receives speed measurement signals from two roller speed measuring instruments and controls the operation of the servo motor. When the roller speed measured by the roller speed measuring instrument is inconsistent with the production speed, the control panel controls the servo motor to adjust the roller speed.

6. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roll coating production line according to claim 1, characterized in that, If the roller speeds measured by the two roller speed measuring instruments are consistent, it indicates that the belt and the two gear transmission groups are in good condition. If they are inconsistent, it indicates that the belt and the two gear transmission groups are in poor condition, and the control panel will prompt for maintenance.

7. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roll coating production line according to claim 1, characterized in that, The distance monitoring unit includes two bidirectional infrared probes and four annular reflectors. The two bidirectional infrared probes are respectively installed at both ends of the horizontal marker, and the four annular reflectors are respectively installed on the back roller shafts at both ends of the two back rollers. One bidirectional infrared probe corresponds to two annular reflectors. The distance between the two ends of the back rollers and the horizontal marker is detected by the cooperation of the bidirectional infrared probes and the annular reflectors.

8. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roll coating production line according to claim 1, characterized in that, The horizontal marker is equipped with adjusting bolts at both ends, which can be used to adjust the horizontal state of the horizontal marker.

9. The device for eliminating speed difference of the back roller and monitoring the horizontal state of the back roller in a lithium-ion battery separator roller coating production line according to claim 1, characterized in that, The protective cover is divided into two detachable parts, with flanges designed at the top and bottom of each part, and the two parts are connected by bolts; and the inner connection of the protective cover is provided with two reserved holes for the back roller shaft and one reserved hole for the horizontal marker, so that the back roller shaft and the horizontal marker can pass through to realize loading, unloading and replacement.

10. The device for eliminating back roller speed difference and monitoring back roller horizontal state in a lithium-ion battery separator roll coating production line according to claim 1, characterized in that, The protective cover has pre-drilled openings on both the front and rear sides, and transparent viewing mirrors are installed in the pre-drilled openings so that operators can observe the status of the belt and gear transmission assembly and the annular reflector at any time; at the same time, bolt holes are left on the outer edges of the front and rear parts of the protective cover so as to fix it to other mechanisms.

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