A lithium ion battery pole piece cleaning device

Abstract

The utility model provides a kind of lithium ion battery pole piece cleaning device, including conveyor belt, cleaning tank and drying assembly, conveyor belt middle part is bent downwards and extends to the inside of the cleaning tank, and ultrasonic generator and aeration hole are provided in the inside of the cleaning tank;Drying assembly includes the corresponding hot air blower of being arranged in the both sides of conveyor belt.The utility model is continuously completed the cleaning and drying of pole piece by the mode of conveyor belt sequentially through cleaning tank and drying assembly, so without any manual assistance, pole piece cleaning work can be completed full automation, greatly improve work efficiency, reduce manpower amount of labour;In the utility model, pole piece is placed on conveyor belt, contact with other pole piece throughout, also will not occur collision, friction etc., can better protect the integrity of pole piece, improve yield.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery production technology, and in particular to a lithium-ion battery electrode cleaning device. Background Technology

[0002] With the rapid development of electric vehicles and smartphones, the demand for lithium-ion batteries has been continuously increasing, which has also promoted the progress and development of lithium-ion battery technology. Lithium batteries mainly consist of several parts, including electrodes, separators, electrolytes, and casings. During the electrode manufacturing process, impurities such as oil and dust can easily adhere to the surface of the lithium battery electrodes. In subsequent processing, this can lead to problems such as poor adhesion during coating and unstable electrode tab welding, resulting in inconsistent lithium battery capacity, especially internal resistance, affecting the consistency of the battery pack assembly and reducing the actual lifespan of the battery pack. Therefore, it is necessary to clean the processed electrodes.

[0003] Existing cleaning methods mainly involve loading the electrode sheets into a container, immersing them in water in a cleaning tank, and then drying them. For example, Chinese utility model patent application number CN2018204457734 discloses a lithium battery electrode cleaning device, including a cleaning frame made of a mesh plate. The cleaning frame has an opening at the bottom to form an inlet and an opening at the top to form an outlet. The top of the cleaning frame has a reinforcing edge, and mounting plates are fixed to the reinforcing edges at both ends of the cleaning frame. Fixing plates are fixed from top to bottom on the inner walls of both sides of the cleaning frame. The fixing plates have recessed mounting grooves, and a support plate is placed in the mounting groove. One end of the support plate is hinged to the lower part of the inner cavity of the mounting groove, and the other end of the support plate is suspended to form a support end. A cleaning plate is movably placed on the support end on the same horizontal plane. The depth of the top of the mounting groove is less than the depth of the bottom. The structure of this solution is reasonable and the cleaning effect is good.

[0004] While the aforementioned equipment achieves the cleaning of the electrode sheets, it requires loading the sheets into the cleaning frame and removing them after cleaning. Both loading and unloading processes are manual, increasing workload and hindering cleaning efficiency. Furthermore, simultaneously cleaning a large number of electrode sheets in the cleaning tank can lead to collisions and friction between adjacent sheets, potentially damaging their surfaces. Therefore, a better cleaning device is needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a lithium-ion battery electrode cleaning device, which solves the problems of low cleaning efficiency and easy damage to the electrodes in existing technologies.

[0006] According to an embodiment of this utility model, a lithium-ion battery electrode cleaning device includes a conveyor belt, a cleaning tank, and a drying assembly. The conveyor belt bends downward in the middle and extends into the cleaning tank. The two ends of the conveyor belt outside the cleaning tank are horizontally mounted. The drying assembly is correspondingly arranged in the horizontal area at the tail of the conveyor belt. An ultrasonic generator is arranged inside the cleaning tank at the height of the conveyor belt, and upward-facing aeration holes are also arranged at the bottom of the cleaning tank at positions corresponding to both sides of the conveyor belt. The drying assembly includes hot air blowers correspondingly arranged on both sides of the conveyor belt. The air outlet direction of the hot air blowers is horizontal and perpendicular to the conveying direction of the conveyor belt. The height of the hot air blower outlet corresponds to the height of the lithium-ion battery electrode on the surface of the conveyor belt.

[0007] Furthermore, the conveyor belt includes a first horizontal section, a first inclined section, a second horizontal section, a second inclined section, and a third horizontal section arranged sequentially. The first horizontal section corresponds to the beginning of the conveyor belt and is located outside the washing tank. The top of the first inclined section and the lower part of the second inclined section are located inside the washing tank. The second horizontal section is completely inside the washing tank. The third horizontal section corresponds to the end of the conveyor belt and is located outside the washing tank. The drying component is arranged corresponding to the third horizontal section.

[0008] Furthermore, the conveyor belt surface is provided with equally spaced support plates, which are perpendicular to the conveyor belt surface and the conveying direction of the conveyor belt. The spacing between adjacent support plates is less than half the length of the lithium-ion battery electrode.

[0009] Furthermore, a fixing component is also provided inside the cleaning tank. The fixing component includes a mounting frame positioned above the cleaning tank relative to the conveyor belt. Several rollers are provided at the bottom of the mounting frame. The rollers extend downward into the cleaning tank, and the distance between the rollers and the conveyor belt corresponds to the thickness of the lithium-ion battery electrode.

[0010] Furthermore, the width of the roller is much smaller than the width of the lithium-ion battery electrode, and an elastic sponge pad is also provided on the surface of the roller.

[0011] Furthermore, the drying assembly also includes a touch roller, which includes a rotating shaft horizontally arranged above the conveyor belt. The rotating shaft is perpendicular to the conveyor belt's conveying direction. Several collision plates are evenly spaced around the rotating shaft. When the collision plates rotate to the bottom as the rotating shaft rotates, the distance between the collision plates and the surface of the conveyor belt is less than the thickness of the lithium-ion battery electrode.

[0012] Furthermore, there are two hot air blowers, which are respectively located at the front and rear positions of the contact roller, and the air outlet directions of the hot air blowers are opposite.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model continuously cleans and dries the electrode sheets by having them pass through the cleaning tank and drying components sequentially via a conveyor belt. Therefore, it can complete the electrode sheet cleaning work in a fully automated manner without any manual assistance, which greatly improves work efficiency and reduces manual labor.

[0015] 2. In this application, the electrode is placed on the conveyor belt and does not come into contact with other electrode throughout the process, nor does it collide or rub against other electrode. This better protects the integrity of the electrode and improves the yield rate. Attached Figure Description

[0016] Figure 1 This is a side view of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the conveyor belt in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the drying component in an embodiment of the present invention.

[0019] Figure 2 The dotted line in the middle represents the lithium-ion battery electrode.

[0020] In the above attached figures: 1. Conveyor belt; 2. Washing tank; 3. Hot air blower; 4. Contact roller; 5. Mounting frame; 6. Roller roller; 7. Support plate; 11. First horizontal section; 12. First inclined section; 13. Second horizontal section; 14. Second inclined section; 15. Third horizontal section; 21. Ultrasonic generator; 22. Aeration hole; 41. Rotating shaft; 42. Collision plate. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown in the figure, this utility model embodiment proposes a lithium-ion battery electrode cleaning device, including a conveyor belt 1, a cleaning tank 2, and a drying assembly. The middle part of the conveyor belt 1 is bent downwards and extends into the cleaning tank 2. The two ends of the conveyor belt 1 outside the cleaning tank 2 are horizontally mounted, and the drying assembly is correspondingly arranged in the horizontal area at the tail of the conveyor belt 1.

[0023] In this embodiment, the conveyor belt 1 includes a first horizontal section 11, a first inclined section 12, a second horizontal section 13, a second inclined section 14, and a third horizontal section 15 arranged sequentially. The first horizontal section 11 corresponds to the beginning of the conveyor belt 1 and is located outside the washing tank 2. The top of the first inclined section 12 and the lower part of the second inclined section 14 are located inside the washing tank 2. The second horizontal section 13 is completely inside the washing tank 2. The third horizontal section 15 corresponds to the end of the conveyor belt 1 and is located outside the washing tank 2. The drying component is arranged corresponding to the third horizontal section 15.

[0024] like Figure 2 As shown, preferably, the surface of the conveyor belt 1 is provided with equally spaced support plates 7, which are perpendicular to the surface of the conveyor belt 1 and also perpendicular to the conveying direction of the conveyor belt 1. The support plates 7 can support the electrode sheets away from the surface of the conveyor belt 1, thereby reducing the contact area between the conveyor belt 1 and the electrode sheets, and preventing the bottom of the electrode sheets from being in close contact with the conveyor belt 1, thus avoiding ineffective cleaning and drying. Furthermore, the spacing between adjacent support plates 7 is less than half the length of the lithium-ion battery electrode sheet, ensuring that the electrode sheet is always supported by at least three support plates 7, resulting in higher stability.

[0025] The cleaning tank 2 includes an inlet and an outlet for adding cleaning solution and discharging wastewater. An ultrasonic generator 21 is installed inside the cleaning tank 2 at the height of the second horizontal section 13, aligning the ultrasonic generator 21 with the electrode sheets above the second horizontal section 13. An upward-facing aeration hole 22 is also provided at the bottom of the cleaning tank 2 on both sides of the second horizontal section 13. The aeration hole 22 continuously generates bubbles, causing the water in the area above to vibrate continuously, resulting in a better cleaning effect. The drying assembly includes hot air blowers 3 positioned on both sides of the conveyor belt 1. The hot air blowers 3 have a horizontal airflow direction, perpendicular to the conveyor belt 1's transport direction. The height of the hot air blower 3's outlet corresponds to the height of the lithium-ion battery electrode sheets on the surface of the conveyor belt 1, allowing the blown hot air to pass horizontally across the upper and lower surfaces of the electrode sheets. According to the laws of physics, this maximizes the evaporation rate of moisture on the electrode sheet surface, ensuring that the electrode sheets are completely dry after passing through the drying assembly.

[0026] The cleaning tank 2 is also equipped with a fixing component, which includes a mounting frame 5 positioned above the conveyor belt 1. Several rollers 6 are located at the bottom of the mounting frame 5, extending downwards into the cleaning tank 2. The distance between the rollers 6 and the conveyor belt 1 corresponds to the thickness of the lithium-ion battery electrode. The rollers 6 keep the electrode fixed inside the cleaning tank 2, preventing it from detaching from the conveyor belt 1 due to buoyancy, water oscillation, or other factors. Furthermore, the width of the rollers 6 is much smaller than the width of the lithium-ion battery electrode, thus reducing the contact area between the rollers 6 and the electrode and preventing the rollers 6 from hindering the cleaning effect. Additionally, the surface of the rollers 6 is equipped with an elastic sponge pad, ensuring the effective fixing of the electrode while preventing excessive pressure that could damage it. It should be noted that the spacing between the rollers 6 controls that each electrode contacts only one roller 6.

[0027] like Figure 3 As shown in this embodiment, the drying assembly further includes a touch roller 4. The touch roller 4 includes a rotating shaft 41 horizontally positioned above the conveyor belt 1, perpendicular to the conveyor belt 1's conveying direction. Six collision plates 42 are evenly spaced around the rotating shaft 41, radially distributed along the shaft 41. When the collision plates 42 rotate to their lowest point with the rotating shaft 41, the distance between them and the surface of the conveyor belt 1 is less than the thickness of the lithium-ion battery electrode. In this embodiment, the rotation direction of the rotating shaft 41 is opposite to the conveyor belt 1's conveying direction, so that when the collision plate 42 rotates to its lowest point, it collides directly with the end of an electrode, pushing the electrode a short distance towards its starting point. Subsequently, the collision plate 42 disengages from the electrode, and before the next collision plate 42 contacts the electrode, the electrode moves out of the position of the touch roller 4. This allows the electrode to achieve a small displacement, changing the contact position between its bottom and the support plate 7, thus exposing the original contact position with the support plate 7 and achieving more thorough drying. In conjunction with this, there are two hot air blowers 3, which are respectively located in front of and behind the touch roller 4, and the air outlet directions of the hot air blowers 3 are opposite.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lithium-ion battery electrode cleaning device, characterized in that: The system includes a conveyor belt, a washing tank, and a drying assembly. The conveyor belt bends downwards in the middle and extends into the washing tank. The two ends of the conveyor belt outside the washing tank are horizontally mounted. The drying assembly is correspondingly located in the horizontal area at the tail of the conveyor belt. An ultrasonic generator is installed inside the washing tank at the height of the conveyor belt, and upward-facing aeration holes are also provided at the bottom of the washing tank at positions corresponding to the sides of the conveyor belt. The drying assembly includes hot air blowers corresponding to the sides of the conveyor belt. The air outlet direction of the hot air blowers is horizontal and perpendicular to the conveyor belt's conveying direction. The height of the hot air blower's outlet corresponds to the height of the lithium-ion battery electrode sheets on the surface of the conveyor belt.

2. The lithium-ion battery electrode cleaning device as described in claim 1, characterized in that: The conveyor belt includes a first horizontal section, a first inclined section, a second horizontal section, a second inclined section, and a third horizontal section arranged sequentially. The first horizontal section corresponds to the beginning of the conveyor belt and is located outside the washing tank. The top of the first inclined section and the lower part of the second inclined section are located inside the washing tank. The second horizontal section is completely inside the washing tank. The third horizontal section corresponds to the end of the conveyor belt and is located outside the washing tank. The drying component is arranged corresponding to the third horizontal section.

3. The lithium-ion battery electrode cleaning device as described in claim 1, characterized in that: The conveyor belt surface is provided with equally spaced support plates, which are perpendicular to the conveyor belt surface and the conveying direction of the conveyor belt. The distance between adjacent support plates is less than half the length of the lithium-ion battery electrode.

4. The lithium-ion battery electrode cleaning device as described in claim 1, characterized in that: The cleaning tank is also equipped with a fixing component, which includes a mounting frame positioned above the cleaning tank relative to the conveyor belt. The bottom of the mounting frame is provided with several rollers that extend downward into the cleaning tank. The distance between the rollers and the conveyor belt corresponds to the thickness of the lithium-ion battery electrode.

5. The lithium-ion battery electrode cleaning device as described in claim 4, characterized in that: The width of the roller is much smaller than the width of the lithium-ion battery electrode, and the surface of the roller is also provided with an elastic sponge pad.

6. The lithium-ion battery electrode cleaning device as described in claim 2, characterized in that: The drying assembly also includes a touch roller, which includes a rotating shaft horizontally arranged above the conveyor belt. The rotating shaft is perpendicular to the conveyor belt's conveying direction. Several collision plates are evenly spaced around the rotating shaft. When the collision plates rotate to the bottom as the rotating shaft rotates, the distance between the collision plates and the surface of the conveyor belt is less than the thickness of the lithium-ion battery electrode.

7. The lithium-ion battery electrode cleaning device as described in claim 6, characterized in that: The hot air blower has two units, which are respectively located at the front and rear positions of the contact roller, and the air outlet directions of the hot air blower are opposite.

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