Equipment for preventing dark marks from being generated during coating of lithium ion battery

Abstract

Equipment for preventing dark marks from being generated during coating of a lithium ion battery is characterized in that a fixed support is connected with a coating machine for coating the lithium ion battery, the fixed support comprises a pair of bearing plates arranged on the two sides of a back roller for coating, and the two ends of a base connecting rod are connected with the bearing plates and are opposite to the back roller at intervals; the scraper base is adjustably arranged on the base connecting rod through the adjusting module, the scraper blade is detachably connected with the scraper base, the cutting edge of the scraper blade faces the back roller, the two ends of the cleaner sliding rod are connected with the bearing plate through the pair of bearing columns, the cleaning slider is slidably connected with the cleaner sliding rod, and the negative pressure suction nozzle is fixedly connected with the cleaning slider and faces the scraper blade. According to the equipment, the back roller is cleaned in real time in the coating production process, the scrap rate is reduced, and the yield is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery production coating, in particular to a device for preventing dark marks from being generated in lithium ion battery coating. Background Art

[0002] Lithium-ion batteries have the characteristics of high energy density, long cycle life, high safety and fast charging and discharging. They have important applications in various fields of the national economy, including automobiles and electronic information.

[0003] As one of the most complex and critical links in the production of lithium batteries, the coating process affects the energy density, cycle life and safety of lithium batteries. Although the setting parameters of the oven wind frequency and temperature have been defined in the process documents in the coating production, there are fluctuations in the wind frequency and temperature in the actual production. At the same time, the surface density of the coating will exceed the standard upper limit when the coating is started, which will cause the pole roll to not be completely dried in the oven after coating, and it will leave the oven in a wet film or slightly wet film state. At this time, the film will contact the second coating back roller and the wet slurry will stick to the roller. If the sticky roller slurry cannot be cleaned up in time, the sticky roller area will lift up the foil at the corresponding position, shortening the gap between the foil and the coating lip during coating, resulting in a coating surface density lower than the normal area. After the pole roll is compacted by roller, it will be a dark mark defect and appear periodically. This defect occurs in the positive electrode coating, and black spots will form in the dark mark area after the battery cell is made, affecting the battery capacity and cycle life; if this defect occurs in the negative electrode coating, lithium precipitation will occur in the dark mark area after the battery cell is made, affecting the battery safety. The general practice in the industry is to stop the coating machine at a fixed time and use the stop window to manually clean the backing roller. However, the slurry sticking to the roller during the coating process cannot be cleaned in time. When the backing roller is adhered to the slurry, the coating machine is running continuously, and the abnormality cannot be found by naked eyes under the dynamic conditions of foil feeding. At the same time, dark marks cannot be found on the pole rolls that have not been rolled and compacted. Therefore, when the production staff finds the dark marks, the coated pole rolls produced during this period may have defects, resulting in batch quality problems.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The utility model aims to provide a device for preventing dark marks from being produced in lithium-ion battery coating, so as to realize real-time cleaning of the back roller during the coating production process, avoid periodic dark mark defects caused by slurry adhering to the back roller, thereby reducing scrap and improving the quality rate.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model discloses a device for preventing dark marks from being produced during coating of lithium-ion batteries, comprising:

[0008] A fixed bracket is connected to a coating machine for coating lithium-ion batteries, and the fixed bracket includes a pair of support plates arranged on both sides of a backing roller for coating.

[0009] A base connecting rod, both ends of which are connected to the support plate and spaced relative to the back roller,

[0010] The scraper base is adjustably arranged on the base connecting rod via an adjustment module,

[0011] a scraper blade, which is detachably connected to the scraper base and has a blade edge facing the backing roller,

[0012] The cleaning slide bar has two ends connected to the support plate via a pair of support columns.

[0013] a cleaning slider slidably connected to the cleaning slider rod,

[0014] A negative pressure suction nozzle is fixedly connected to the cleaning slider and faces the scraper blade.

[0015] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the adjustment module is slidably connected to the base connecting rod, and the scraper base is rotatably connected to the adjustment module.

[0016] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the adjustment module includes a sliding portion slidably connected to the base connecting rod and a fastening portion that locks and unlocks the sliding portion.

[0017] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the fastening portion includes a fastening bolt.

[0018] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the scraper base is pivotally connected to the adjustment module to adjust the cutting angle between the scraper blade and the back roller.

[0019] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the base connecting rod and the cleaner sliding rod both extend in a direction parallel to the central axis of the back roller.

[0020] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the distance between the base connecting rod and the back roller is adjustable.

[0021] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the extension direction of the support plate is perpendicular to the central axis of the backing roller.

[0022] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the cleaning slider includes a motor for driving the sliding movement.

[0023] In the device for preventing dark marks from being produced during coating of lithium-ion batteries, the scraper blade is a flexible structure.

[0024] In the above technical scheme, the utility model provides a device for preventing dark marks from being produced in lithium-ion battery coating, which has the following beneficial effects: the device for preventing dark marks from being produced in lithium-ion battery coating adopts an online cleaning method, and the cleaning scraper mechanism and the negative pressure dust removal mechanism work in coordination to keep the coating back roller effectively clean in real time, optimize the coating machine shutdown cleaning and the trial coating time after the head is fed in, reduce the scrapping of trial coating and also improve the production capacity. Because the equipment adopts an online cleaning solution, it can eliminate the problem of periodic dark marks caused by sticky rollers, greatly improving the quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a device for preventing dark marks from being produced during coating of lithium-ion batteries according to the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] like Figure 1 As shown, in one embodiment, a device for preventing dark marks from being produced in lithium-ion battery coating of the utility model comprises:

[0036] A fixed bracket 1 is connected to a coating machine for coating lithium-ion batteries. The fixed bracket 1 includes a pair of support plates arranged on both sides of a backing roller for coating.

[0037] A base connecting rod 2, both ends of which are connected to the support plate and spaced relative to the back roller, a scraper base 3, which is adjustably arranged on the base connecting rod 2 via an adjustment module 5,

[0038] a scraper blade 4, which is detachably connected to the scraper base 3 and the blade edge of the scraper blade 4 faces the back roller,

[0039] The cleaning slide bar 6 has two ends connected to the support plate via a pair of support columns.

[0040] A cleaning slider 7, which is slidably connected to the cleaning slider rod 6,

[0041] A negative pressure suction nozzle 8 is fixedly connected to the cleaning slider 7 and faces the scraper blade 4 .

[0042] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the adjustment module 5 is slidably connected to the base connecting rod 2 , and the scraper base 3 is rotatably connected to the adjustment module 5 .

[0043] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the adjustment module 5 includes a sliding portion slidably connected to the base connecting rod 2 and a fastening portion that locks and unlocks the sliding portion.

[0044] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the fastening portion includes a fastening bolt.

[0045] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the scraper base 3 is pivotally connected to the adjustment module 5 to adjust the cutting angle between the scraper blade 4 and the back roller.

[0046] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the base connecting rod 2 and the cleaner sliding rod 6 both extend in a direction parallel to the central axis of the back roller.

[0047] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the distance between the base connecting rod 2 and the back roller is adjustable.

[0048] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the extension direction of the support plate is perpendicular to the central axis of the backing roller.

[0049] In a preferred embodiment of the device for preventing dark marks from being generated during coating of lithium-ion batteries, the cleaning slider 7 includes a motor for driving the sliding movement.

[0050] In a preferred embodiment of the device for preventing dark marks from being produced during coating of lithium-ion batteries, the scraper blade 4 is a flexible structure.

[0051] In one embodiment, the device is connected to the coating machine through a fixed bracket 1. The cleaning area of ​​the cleaning contact position between the scraper and the back roller can be adjusted by sliding left and right on the device connecting rod. After the position is adjusted, it is locked by tightening the fixing bolts. The scraper base 3 can adjust the gap to insert the cut polyurethane scraper blade 4, and the scraper base 3 can be rotated to adjust the cutting angle between the scraper and the back roller. It is fixed by tightening the screws to make the scraper fit the back roller to achieve the purpose of cleaning the back roller. After cleaning, foreign matter such as carbon powder accumulates on the scraper. By moving the cleaner on the cleaner slide bar 6, the suction nozzle can suck away the accumulated foreign matter under negative pressure. During the implementation process, the cleaning scraper mechanism and the negative pressure dust removal mechanism work together to clean and take away foreign matter such as carbon powder after cleaning to ensure the cleanliness of the back roller surface during the coating process. The scraper blade 4 can be replaced separately after being worn, and the replacement cost is low; there is no need to clean it in the shutdown state, which reduces the scrapping of trial coating after the coating head is fed in and avoids waste; it can automatically collect the slurry residue after removal, eliminating the need for manual cleaning steps, thereby greatly reducing the safety risks brought by manual cleaning operations when the equipment is running; the cleaning scraper and the back roller are in contact with uniform force, and the back roller will not produce circular jump due to uneven force, and the cleaning method is scientific and effective; the cleaning effect of different areas can be achieved by adjusting the scraper length and the contact distance with the back roller, which can meet the needs of coating machines of different manufacturers and models and has a wide range of applicability.

[0052] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.

[0053] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for preventing dark marks from being produced in lithium-ion battery coating, characterized in that: These include, A fixed bracket is connected to a coating machine for coating lithium-ion batteries, and the fixed bracket includes a pair of support plates arranged on both sides of a backing roller for coating. A base connecting rod, both ends of which are connected to the support plate and spaced relative to the back roller, The scraper base is adjustably arranged on the base connecting rod via an adjustment module, a scraper blade, which is detachably connected to the scraper base and has a blade edge facing the backing roller, The cleaning slide bar has two ends connected to the support plate via a pair of support columns. a cleaning slider slidably connected to the cleaning slider rod, A negative pressure suction nozzle is fixedly connected to the cleaning slider and faces the scraper blade.

2. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 1, characterized in that: The adjusting module is slidably connected to the base connecting rod, and the scraper base is rotatably connected to the adjusting module.

3. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 2, characterized in that: The adjusting module comprises a sliding part slidably connected to the base connecting rod and a fastening part for locking and unlocking the sliding part.

4. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 3, characterized in that: The fastening portion includes a fastening bolt.

5. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 1, characterized in that: The scraper base is pivotally connected to the adjustment module to adjust the cutting angle between the scraper blade and the back roller.

6. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 1, characterized in that: The base connecting rod and the cleaner sliding rod both extend in a direction parallel to the central axis of the back roller.

7. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 1, characterized in that: The distance between the base connecting rod and the back roller is adjustable.

8. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 1, characterized in that: The extending direction of the supporting plate is perpendicular to the central axis of the backing roller.

9. The device for preventing dark marks from being produced in coating of lithium-ion batteries according to claim 1, characterized in that: The cleaning slider includes a motor that drives the slider.

10. The device for preventing dark marks from being produced in lithium-ion battery coating according to claim 1, characterized in that: The scraper blade is a flexible structure.

Images