Circulating filtering device for battery cell production

Abstract

The utility model relates to a battery cell production circulating filtering device which comprises a water tank, a conveying channel, a conveying belt and a stirring tank, the conveying channel is installed at the top end of the water tank, the conveying belt is installed in the water tank, a plurality of water permeable holes are formed in the surface of the conveying belt and located below a discharging port of the conveying channel, and the discharging port of the conveying belt faces a feeding port of the stirring tank. A cleaning assembly is arranged on the water tank and comprises a cleaning roller and a plurality of connecting columns, the connecting columns are connected to the water tank, the cleaning roller is mounted on the connecting columns, bristles are arranged on the surface of the cleaning roller and abut against the surface of the conveying belt, a funnel is arranged on the water tank, and the funnel is located between a discharging port of the conveying belt and a feeding port of the stirring tank. An extension plate is connected to the funnel, the extension plate is obliquely arranged and extends below the cleaning roller, a water suction pump is installed on the water tank, the water inlet end of the water suction pump communicates with the bottom of the water tank, and the water outlet end communicates with the interior of the conveying channel. The device has the effect of improving the filtering efficiency of the filtering device.

Description

Technical Field

[0001] This application relates to the field of battery cell production technology, and in particular to a battery cell production circulating filtration device. Background Technology

[0002] Battery cell recycling is an emerging industry that has emerged with the continuous development of the lithium battery industry. Graphite filtration recycling is a downstream process of battery cell recycling. After the graphite and aluminum foil are separated, they are mixed with water and require a filtration device to separate the two.

[0003] Chinese patent CN219518046U discloses a graphite recycling and filtration separation device for battery cells. It includes a graphite inlet, a transfer water tank, a filter belt conveyor line, a collection funnel, a circulating water tank, and a mixing tank. The filter belt conveyor line uses a filter screen conveyor belt; the graphite inlet is connected to the end of the transfer water tank; the outlet of the transfer water tank is located on the filter belt; the collection funnel is positioned below the front end of the filter belt to collect materials, and its bottom is connected to the mixing tank; the circulating water tank is located below the filter belt conveyor line. This invention separates graphite from a mixture of graphite and water using a filter belt conveyor line, and features automatic water filtration and graphite conveying. When integrated into an automated production line, this invention can achieve fully automated and unmanned production, with good product quality consistency, making it suitable for mass production processes.

[0004] Regarding the aforementioned technologies, the existing technology uses a filter conveyor belt to filter water from the graphite mixture, and finally the water falls into the feed hopper and mixing tank through a collection funnel, thus achieving the effect of filtering the graphite mixture. However, after the water in the graphite mixture is filtered, the graphite tends to adhere to the filter conveyor belt, resulting in a smaller amount of graphite entering the feed hopper and mixing tank, which reduces the filtration efficiency of the filtration device. Utility Model Content

[0005] In order to improve the filtration efficiency of the filtration device, this application provides a circulating filtration device for battery cell production.

[0006] The technical solution adopted in this application for the circulating filtration device for battery cell production is as follows:

[0007] A circulating filtration device for battery cell production includes a water tank, a conveying channel, a conveyor belt, and a mixing tank. The conveying channel is installed at the top of the water tank, and the conveyor belt is installed inside the water tank. The surface of the conveyor belt is provided with several water-permeable holes and is located below the discharge port of the conveying channel. The discharge port of the conveyor belt faces the inlet of the mixing tank. A cleaning assembly is provided on the water tank. The cleaning assembly includes a cleaning roller and connecting columns. Several connecting columns are connected to the water tank. The cleaning roller is installed on the connecting columns and has bristles on its surface. The bristles abut against the surface of the conveyor belt. A funnel is provided on the water tank and is located between the discharge port of the conveyor belt and the inlet of the mixing tank. An extension plate is connected to the funnel. The extension plate is inclined and extends to below the cleaning roller. A water pump is installed on the water tank. The inlet of the water pump is connected to the bottom of the water tank, and the outlet is connected to the inside of the conveying channel.

[0008] By adopting the above technical solution, during filtration, the graphite mixture falls onto the conveyor belt through the conveyor channel. After being filtered by the conveyor belt, some of the graphite mixture adheres to the surface of the conveyor belt. The bristles on the cleaning rollers contact the surface of the conveyor belt, removing the graphite from the conveyor belt. Excess graphite falls onto the extension plate and enters the mixing tank through the funnel, thus achieving the effect of graphite filtration. By setting up cleaning rollers to remove graphite from the surface of the conveyor belt, the possibility of graphite adhering to the conveyor belt surface is reduced, ensuring that as much graphite as possible enters the mixing tank. Compared with existing technologies, the filtration efficiency of the filtration device is improved.

[0009] Optionally, the conveyor belt surface is connected with a plurality of material guide bars.

[0010] By adopting the above technical solution, the graphite mixture falls onto the conveyor belt. Although the graphite mixture is filtered of water, it is still in a damp state. Since the conveyor belt is inclined, the graphite is prone to slipping on the surface, affecting graphite transport. By setting up baffles, the possibility of graphite slipping on the conveyor belt surface is reduced, and more graphite can enter the mixing tank per unit time, improving the graphite transport efficiency.

[0011] Optionally, a support spring is sleeved on the connecting column, the cleaning roller is slidably fitted on the connecting column, and the support spring is located between the cleaning roller and the bottom end of the connecting column.

[0012] By employing the above technical solution, the material barrier will impact the cleaning roller, thus hindering the movement of the material barrier. By incorporating a support spring, the cleaning roller, under the force of the support spring, applies pressure to the conveyor belt surface. When the material barrier contacts the cleaning roller, the cleaning roller descends, compressing the support spring, thereby allowing the material barrier to pass smoothly through the cleaning roller. Subsequently, the cleaning roller moves in the opposite direction using the force of the support spring and continues to clean the conveyor belt surface.

[0013] Optionally, the cleaning roller surface is connected to a scraper, the scraper abuts against the conveyor belt surface, the scraper is inclined, the abutting end of the scraper faces the water tank, and the material blocking bar surface is connected to a plurality of abutting flanges.

[0014] The above technical solution uses soft bristles, which may not completely remove graphite from the conveyor belt surface. By incorporating a scraper, which is made of rigid material and adheres closely to the conveyor belt surface, the scraper can more effectively remove graphite. When the guide bar approaches the scraper, the contact flange applies pressure to the scraper, causing the cleaning roller to descend and avoid the guide bar.

[0015] Optionally, a primary filtration assembly is provided in the water tank. The primary filtration assembly includes a filter plate, a support cylinder, a vibration motor, and a buffer spring. A fixed plate is connected to the inner wall of the water tank, and a fixed column is connected to the fixed plate. Several filter plates are slidably fitted on the fixed columns. The filter plates are inclined and located between the discharge port of the conveying channel and the conveyor belt. Taking the direction from the conveying channel to the conveyor belt as a reference, the height of the filter plates gradually decreases. The buffer spring is sleeved on the fixed column and located between the lowest filter plate and the fixed plate. The support cylinder is sleeved on the fixed column and located between two adjacent filter plates. Taking the direction from top to bottom as a reference, the inner diameter of the filter holes on several filter plates gradually decreases. The vibration motor is installed on the bottom wall of the lowest filter plate.

[0016] By adopting the above technical solution, during the initial filtration of the graphite mixture, a vibration motor is activated to vibrate the lowest filter plate. This vibration is transmitted through a support cylinder to all filter plates, thus achieving initial filtration of the graphite mixture. Subsequently, the graphite moves due to the vibration and falls onto the conveyor belt for final filtration, achieving the effect of both conveying and filtering the graphite. This initial filtration increases the filtration time and reduces the possibility of graphite loss with water, making the filtration process of the graphite mixture more efficient.

[0017] Optionally, a limiting frame is connected to the filter plate, and the limiting frame is open on one side facing the conveyor belt.

[0018] The above technical solution involves graphite mixtures falling onto the filter plate, which easily disperses the mixture, making it difficult to ensure that all pre-filtered graphite falls onto the conveyor belt. By setting a limiting frame, all pre-filtered graphite moves from the opening side of the limiting frame, ensuring that all graphite falls onto the conveyor belt, thus improving the filtration and conveying efficiency of graphite.

[0019] Optionally, the surface of the filter plate is provided with a waterproof coating.

[0020] By employing the above technical solution, the filter plate directly contacts the graphite mixture. With prolonged use, the filter plate is susceptible to corrosion, which could cause the graphite to mix with and move with the rust, affecting subsequent graphite processing. By applying a waterproof coating to isolate the graphite mixture from direct contact with the filter plate, the possibility of corrosion is reduced, ensuring the purity of the graphite and extending the service life of the filter plate.

[0021] Optionally, a partition plate is connected inside the water tank, and an overflow port is provided on the partition plate. The partition plate divides the inside of the water tank into a settling tank and a drain tank. The primary filter component and the conveyor belt are both located in the settling tank, and the water pump is connected to the settling tank.

[0022] By adopting the above technical solution, after filtering the graphite mixture, the water falls into the settling tank, at which point residual graphite remains in the water. The settling process ensures that as much graphite as possible settles within the tank, facilitating subsequent collection by workers. Excess water flows through the overflow outlet into the wastewater discharge tank for convenient wastewater discharge.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. During filtration, the graphite mixture falls onto the conveyor belt through the conveyor channel. After being filtered by the conveyor belt, some of the graphite mixture adheres to the surface of the belt. The bristles on the cleaning rollers contact the surface of the conveyor belt, removing the graphite from the belt. Excess graphite falls onto the extension plate and enters the mixing tank through the funnel, thus achieving the effect of graphite filtration. By setting up cleaning rollers to remove graphite from the surface of the conveyor belt, the possibility of graphite adhering to the conveyor belt surface is reduced, ensuring that as much graphite as possible enters the mixing tank. Compared with existing technologies, this improves the filtration efficiency of the filtration device.

[0025] 2. During the initial filtration of the graphite mixture, the vibration motor is activated, causing the lowest filter plate to vibrate. This vibration is transmitted through the support cylinder to all filter plates, resulting in the initial filtration of the graphite mixture. Subsequently, the graphite moves due to the vibration and falls onto the conveyor belt for final filtration, achieving both conveying and filtering of the graphite. This initial filtration increases the filtration time and reduces the possibility of graphite loss with water, making the filtration process of the graphite mixture more efficient. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the cell production cycle filtration device in the embodiments of this application.

[0027] Figure 2 This is a cross-sectional view used to illustrate the structure of the filtering device in the embodiments of this application.

[0028] Figure 3 This is a schematic diagram of the structure of the primary filter component in the embodiments of this application.

[0029] Figure 4 This is a schematic diagram of the structure of the cleaning component in the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Water tank; 11. Divider plate; 12. Settling tank; 13. Drainage tank; 14. Water pump; 2. Conveying channel; 3. Conveyor belt; 31. Material blocking bar; 32. Abutting flange; 4. Mixing tank; 5. Primary filter assembly; 51. Filter plate; 511. Limiting frame; 52. Support cylinder; 53. Vibrating motor; 54. Buffer spring; 6. Cleaning assembly; 61. Cleaning roller; 611. Scraper; 62. Connecting column; 621. Support spring; 7. Funnel; 71. Extension plate. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0032] This application discloses a circulating filtration device for battery cell production. (Refer to...) Figure 1 and Figure 2 The battery cell production circulating filtration device includes a water tank 1, a conveying channel 2, a conveyor belt 3, and a mixing tank 4. The conveying channel 2 is installed at the top of the water tank 1. A partition plate 11 is fixedly connected inside the water tank 1. The partition plate 11 has several overflow ports, dividing the interior of the water tank 1 into a settling tank 12 and a discharge tank 13. The discharge port of the conveying channel 2 is located inside the settling tank 12. The conveyor belt 3 is installed inside the settling tank 12, and the discharge port of the conveyor belt 3 extends to the outside of the water tank 1. Several water-permeable holes are provided on the surface of the conveyor belt. The mixing tank 4 is located at one end of the water tank 1. A funnel 7 is fixedly connected to the inlet of the mixing tank 4, and the funnel 7 is located between the discharge port of the conveyor belt 3 and the mixing tank 4.

[0033] Reference Figure 1 , Figure 2 and Figure 3 A primary filter assembly 5 is installed inside the settling tank 12. The primary filter assembly 5 includes a filter plate 51, a support cylinder 52, a vibration motor 53, and a buffer spring 54. Fixed plates are fixedly connected to the two opposing inner sidewalls of the settling tank 12, and fixed columns are fixedly connected to the fixed plates. Several filter plates 51 slide and engage on the fixed columns; in this embodiment, two plates are used as an example. The filter plates 51 are in an inclined state, with the reference direction being from top to bottom. The height of the filter plates 51 gradually decreases, and the filter plates 51 are located between the discharge port of the conveying channel 2 and the conveyor belt 3. The inner diameter of the filter holes of the upper filter plate 51 is larger than that of the lower filter plate 51. A water pump 14 is installed on the sidewall of the water tank 1. The inlet of the water pump 14 is connected to the inside of the settling tank 12, and the outlet is connected to the inside of the conveying channel 2.

[0034] Reference Figure 3A buffer spring 54 is sleeved on the fixed post and located between the fixed plate and the lower filter plate 51. A support cylinder 52 is sleeved on the fixed post and located between the two filter plates 51. A vibration motor 53 is installed on the bottom wall of the lower filter plate 51.

[0035] During filtration, the vibration motor is started, and the graphite mixture falls onto the upper filter plate 51 for initial filtration layer by layer. Then, all the graphite falls onto the conveyor belt 3 for final filtration. The filtered water falls into the settling tank 12, and the water pump 14 is started to discharge the water back into the conveying channel 2 for filtration again. The filtered graphite falls into the mixing tank 4 through the funnel 7, achieving the effect of circulating filtration of the graphite mixture.

[0036] Reference Figure 2 and Figure 3 To improve the conveying and filtration efficiency of the graphite mixture, a limiting frame 511 is fixedly connected around the filter plate 51, with the limiting frame 511 having an opening facing the conveyor belt 3. The limiting frame 511 is used to restrict the movement direction of the graphite mixture, ensuring that the graphite mixture falls onto the conveyor belt 3. A waterproof coating is provided on the surface of the filter plate 51; in this embodiment, the waterproof coating is an epoxy coating. The waterproof coating is used to increase the service life of the filter plate 51.

[0037] Reference Figure 2 To reduce the possibility of graphite slipping on the conveyor belt 3, several baffles 31 are fixedly connected to the surface of the conveyor belt 3. The baffles 31 are used to intercept graphite and ensure that as much graphite as possible enters the mixing tank 4.

[0038] Reference Figure 2 and Figure 4 A cleaning assembly 6 is installed on the water tank 1, which includes a cleaning roller 61 and connecting columns 62. Two support blocks are fixedly connected to the end of the water tank 1. Several connecting columns 62 are vertically fixedly connected to the support blocks. The cleaning roller 61 is slidably fitted between the two connecting columns 62 and is located below the discharge port of the conveyor belt 3. The surface of the cleaning roller 61 is provided with bristles and a scraper 611. The scraper 611 is inclined, and several abutment flanges 32 are fixedly connected to the baffle bar 31. A support spring 621 is sleeved on the connecting column 62 and is located between the cleaning roller 61 and the support block. An extension plate 71 is fixedly connected to the funnel 7 and extends to below the cleaning roller 61.

[0039] During cleaning, the scraper 611 and brush bristles are supported by the spring 621 and press against the surface of the conveyor belt 3 to remove the graphite adhering to the surface of the conveyor belt 3. When the baffle bar 31 passes by, the contact flange 32 presses the scraper 611, causing the cleaning roller 61 to descend and the support spring 621 to be compressed to avoid the baffle bar 31. The cleaned graphite falls onto the extension plate 71 and finally falls from the funnel 7 into the mixing tank 4, thus achieving the effect of cleaning the graphite on the surface of the conveyor belt 3.

[0040] The implementation principle of the circulating filtration device for battery cell production in this application embodiment is as follows: When filtering graphite mixture, the vibration motor 53 is started, and the graphite mixture falls onto the upper filter plate 51. The graphite mixture is initially filtered layer by layer by vibration. The graphite mixture falls onto the conveyor belt 3 for final filtration. Some graphite directly enters the mixing tank 4 through the funnel 7, while other graphite adheres to the conveyor belt 3 and is cleaned by the scraper 611 and brush. The graphite falls onto the extension plate 71 and finally enters the funnel 7, thus achieving the effect of filtering the graphite mixture.

[0041] By setting up cleaning roller 61 to remove graphite from the surface of conveyor belt 3, the possibility of graphite adhering to the surface of conveyor belt 3 is reduced, ensuring that as much graphite as possible enters the mixing tank 4, thereby improving the filtration efficiency of the filtration device compared to the prior art.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circulating filtration device for battery cell production, comprising a water tank (1), a conveying channel (2), a conveyor belt (3), and a mixing tank (4), wherein the conveying channel (2) is installed at the top of the water tank (1), the conveyor belt (3) is installed inside the water tank (1), the surface of the conveyor belt (3) is provided with a plurality of water-permeable holes and is located below the discharge port of the conveying channel (2), and the discharge port of the conveyor belt (3) faces the inlet of the mixing tank (4), characterized in that: A cleaning assembly (6) is provided on the water tank (1). The cleaning assembly (6) includes a cleaning roller (61) and a connecting column (62). The connecting column (62) is connected to the water tank (1) and several of them are provided. The cleaning roller (61) is installed on the connecting column (62). The surface of the cleaning roller (61) is provided with bristles. The bristles abut against the surface of the conveyor belt (3). A funnel (7) is provided on the water tank (1). The funnel (7) is located between the outlet of the conveyor belt (3) and the inlet of the mixing tank (4). An extension plate (71) is connected to the funnel (7). The extension plate (71) is inclined and extends to the bottom of the cleaning roller (61). A water pump (14) is installed on the water tank (1). The inlet of the water pump (14) is connected to the bottom of the water tank (1), and the outlet is connected to the inside of the conveying channel (2).

2. The cell production circulating filtration device according to claim 1, characterized in that: The surface of the conveyor belt (3) is connected with several material guards (31).

3. The cell production circulating filtration device according to claim 2, characterized in that: A support spring (621) is sleeved on the connecting column (62), and the cleaning roller (61) is slidably fitted on the connecting column (62). The support spring (621) is located between the bottom end of the cleaning roller (61) and the connecting column (62).

4. The cell production circulating filtration device according to claim 3, characterized in that: The cleaning roller (61) has a scraper (611) connected to its surface. The scraper (611) abuts against the surface of the conveyor belt (3). The scraper (611) is inclined and the abutting end of the scraper (611) faces the water tank (1). The baffle bar (31) has several abutting flanges (32) connected to its surface.

5. The cell production circulating filtration device according to claim 1, characterized in that: The water tank (1) is equipped with a primary filter assembly (5), which includes a filter plate (51), a support cylinder (52), a vibration motor (53), and a buffer spring (54). A fixing plate is connected to the inner wall of the water tank (1), and a fixing column is connected to the fixing plate. Several filter plates (51) slide on the fixing column. The filter plates (51) are inclined and located between the discharge port of the conveying channel (2) and the conveyor belt (3). From the conveying channel (2) to the conveyor belt (3), the filter plate (51) is inclined and located between the discharge port of the conveying channel (2) and the conveyor belt (3). With the conveyor belt (3) as the reference direction, the height of the filter plate (51) gradually decreases. The buffer spring (54) is sleeved on the fixed column and located between the filter plate (51) and the fixed plate at the lowest point. The support cylinder (52) is sleeved on the fixed column and located between two adjacent filter plates (51). With the top to bottom as the reference direction, the inner diameter of the filter holes on several filter plates (51) gradually decreases. The vibration motor (53) is installed on the bottom wall of the filter plate (51) at the lowest point.

6. The cell production circulating filtration device according to claim 5, characterized in that: A limiting frame (511) is connected to the filter plate (51), and the limiting frame (511) is set with an opening on one side facing the conveyor belt (3).

7. The cell production circulating filtration device according to claim 5, characterized in that: The filter plate (51) has a waterproof coating on its surface.

8. The cell production circulating filtration device according to claim 5, characterized in that: A partition plate (11) is connected inside the water tank (1). An overflow port is provided on the partition plate (11). The partition plate (11) divides the inside of the water tank (1) into a settling tank (12) and a drain tank (13). The primary filter assembly (5) and the conveyor belt (3) are both located in the settling tank (12). The water pump (14) is connected to the settling tank (12).

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