A cleaning apparatus, system and method

Abstract

The application provides a cleaning device, system and method. The cleaning device comprises a soaking tank for containing cleaning liquid, the soaking tank being provided with an inlet for allowing a battery piece to pass through at one end in the transverse direction; a plurality of conveying roller mechanisms, the plurality of conveying roller mechanisms being located at least partially in the soaking tank and comprising upper and lower conveying rollers arranged in a vertical direction, a predetermined gap being present between the upper and lower conveying rollers to allow the battery piece to move in the transverse direction within the predetermined gap; and a liquid blocking mechanism cooperating with the inlet of the soaking tank, the height of the soaking tank capable of containing the cleaning liquid being higher than the predetermined gap, the liquid blocking mechanism comprising an openable and closable liquid blocking member, the liquid blocking member being opened when the battery piece passes through the inlet to allow the battery piece to pass through the inlet into the predetermined gap, and being closed when there is no battery piece passing through the inlet to close the inlet. The cleaning device of the application can efficiently and thoroughly remove the mask on the surface of the battery piece.

Description

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. CN2023101796614, filed on March 1, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of photovoltaic equipment, and in particular to a cleaning device, system and method. Background Technology

[0004] Metal grid lines are deposited on the surface of the solar cell, such as copper grid lines, zinc grid lines, or stacked copper and zinc grid lines, by electroplating. Generally, a mask material is first coated on the surface of the solar cell to form a mask. Then, photolithography or other chemical and physical methods are used to form mask openings that connect to the surface of the solar cell. Metal material is then deposited in the mask openings to obtain metal grid lines. Finally, the mask is removed.

[0005] Existing methods include using a cleaning solution and a mask to undergo a chemical reaction to remove the mask from the surface of the solar cell.

[0006] Existing methods for removing the mask typically involve spraying, which has poor cleaning efficiency, requires a long spraying time, and often leaves residual mask adhering to the solar cells. Summary of the Invention

[0007] In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a cleaning device, system and method that can efficiently and thoroughly remove the mask on the surface of the battery cell.

[0008] To address the above problems, a first aspect of the present invention provides a cleaning device, the cleaning device comprising:

[0009] An immersion tank for containing cleaning solution, wherein a feed inlet is provided at one lateral end of the immersion tank to allow the battery cells to pass through;

[0010] Multiple conveying roller mechanisms are located at least partially within the soaking tank, and each includes an upper conveying roller and a lower conveying roller arranged vertically, with a predetermined gap between the upper and lower conveying rollers to allow the battery cell to move laterally within the predetermined gap.

[0011] A liquid-blocking mechanism is provided, which cooperates with the inlet of the soaking tank. The soaking tank is capable of holding the cleaning liquid to a height higher than the predetermined gap. The liquid-blocking mechanism includes an openable and closable liquid-blocking member. The liquid-blocking member opens when the battery cell passes through the inlet, so that the battery cell enters the soaking tank through the inlet. It closes when no battery cell passes through the inlet, so as to seal the inlet.

[0012] A second aspect of the present invention provides a cleaning system, the cleaning system comprising:

[0013] Cleaning equipment, wherein the cleaning equipment is any of the cleaning equipment described above;

[0014] A filtration device and / or a membrane sludge separation device, wherein the filtration device is used to filter a first substance, and the membrane sludge separation device is used to separate the first substance;

[0015] The first substance is a mixture of cleaning solution and membrane residue in the soaking tank.

[0016] Thirdly, a cleaning method is provided, the cleaning method comprising:

[0017] Step S1: Provide a battery cell, wherein the battery cell is a battery cell with a mask attached;

[0018] Step S2: Immerse the battery cell in the cleaning solution in the soaking tank to remove the mask attached to the battery cell;

[0019] Step S3: Spray liquid or gas into the bottom of the soaking tank to flush up the membrane residue deposited on the bottom of the soaking tank and suck out the first substance flushed up from the bottom of the soaking tank.

[0020] Due to the above technical solution, the present invention has the following beneficial effects:

[0021] According to the cleaning equipment of the present invention, the immersion tank contains cleaning liquid, and multiple conveying roller mechanisms are arranged in the electroplating tank. The upper and lower conveying rollers can move the battery cells laterally. The immersion tank can hold the cleaning liquid to a height higher than a predetermined gap, so that the battery cells with the mask attached can be completely immersed in the cleaning liquid. The liquid blocking mechanism opens when the battery cell passes through the feed inlet and closes when no battery cell passes through the feed inlet, reducing leakage at the feed inlet and maintaining the cleaning liquid level above the predetermined gap. The battery cells are immersed in the cleaning liquid, which allows the mask on the battery cells to gradually soften and fully react with the cleaning liquid, thereby causing the mask to decompose and peel off the battery cells, and efficiently and thoroughly removing the mask from the surface of the battery cells. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the present invention, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] Figure 1 This is a structural diagram of an embodiment of the cleaning and filtering equipment according to the present invention;

[0024] Figure 2 This is a structural diagram of a first embodiment of the liquid-blocking component according to the present invention;

[0025] Figure 3 These are structural diagrams of the second and third embodiments of the liquid-blocking component according to the present invention;

[0026] Figure 4 This is a structural diagram of an embodiment of the transfer roller and cleaning nozzle according to the present invention;

[0027] Figure 5 This is a structural diagram of a first embodiment of the cleaning system according to the present invention;

[0028] Figure 6 This is a distribution diagram of an embodiment of the adsorption port and injection port according to the present invention;

[0029] Figure 7 This is a structural diagram of a first embodiment of the suction device and spraying device according to the present invention;

[0030] Figure 8 These are structural diagrams of the second and third embodiments of the suction device and the spraying device according to the present invention;

[0031] Figure 9 This is a schematic diagram of an embodiment of the adsorption area of ​​the adsorption port according to the present invention;

[0032] Figure 10 This is a structural diagram of a second embodiment of the cleaning system according to the present invention;

[0033] Figure 11 This is a structural diagram of the third embodiment of the cleaning system according to the present invention;

[0034] Figure 12 This is a structural diagram of an embodiment of the cleaning fluid filtration device according to the present invention;

[0035] Figure 13 This is a structural diagram of the first embodiment of the membrane sludge separation device according to the present invention;

[0036] Figure 14This is a structural diagram of an embodiment of the drive shaft and conveyor belt according to the present invention;

[0037] Figure 15 This is a structural diagram of an embodiment of the conveyor belt and blower according to the present invention;

[0038] Figure 16 This is a structural diagram of an embodiment of the purge tube according to the present invention;

[0039] Figure 17 This is a top view of an embodiment of the conveyor belt according to the present invention;

[0040] Figure 18 This is a top view of an embodiment of the second filter according to the present invention;

[0041] Figure 19 This is a structural diagram of a second embodiment of the membrane sludge separation device according to the present invention;

[0042] Figure 20 This is a structural diagram of a membrane sludge collector according to an embodiment of the present invention;

[0043] Figure 21 This is a structural diagram of a membrane residue dewatering device according to an embodiment of the present invention;

[0044] Figure 22 This is a structural diagram of the third filter screen according to an embodiment of the present invention;

[0045] Figure 23 This is a structural diagram of the third embodiment of the membrane sludge separation device according to the present invention;

[0046] Figure 24 This is a schematic diagram of an embodiment of the cleaning method according to the present invention.

[0047] Figure label:

[0048] 1000. Membrane sludge separation equipment; 1110. Conveyor belt; 1120. First drive shaft; 1130. Second drive shaft; 1210. Purger; 1211. Purge pipe; 1220. Scraper; 1300. Second filter screen; 1400. Membrane sludge collector; 1410. Tank; 1420. Pump; 1430. Liquid level sensor; 1500. Membrane sludge dewatering device; 1510. Third filter screen; 1 521. Screw; 1522. Helical blade; 1523. Extrusion chamber; 1530. Wastewater box; 1540. Membrane residue collection box; 2000. Cleaning equipment; 2100. Immersion tank; 2110. Feed inlet; 2120. Liquid blocking plate; 2130. Hinge; 2140. Water shield; 2150. Lifting mechanism; 2210. Upper conveyor roller; 2222. Lower conveyor roller; 2310. Upper... Liquid-blocking roller; 2320, lower liquid-blocking roller; 2410, upper cleaning nozzle; 2420, lower cleaning nozzle; 2510, first cleaning fluid tank; 2511, first valve; 2520, second cleaning fluid tank; 2521, second valve; 3110, suction port; 3120, spray port; 3210, first pipeline; 3220, second pipeline; 3230, third pipeline; 3240, fourth pipeline 3300, Cleaning fluid filtration device; 3310, Cylinder body; 3320, Cylinder cover; 3330, Filter element; 3341, Rotating shaft; 3342, Paddle; 3350, Drive mechanism; 3361, Feed port; 3362, Discharge port; 3363, First drain port; 3363a, First drain valve; 3364, Second drain port; 3364a, Second drain valve; 3365, Exhaust port. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0051] According to the inventor's analysis, existing cleaning equipment often fails to clean the mask adhering to the battery cell by means of spraying. This is because the mask has strong adhesion to the surface of the battery cell, and the mask is quite hard after curing. Spraying cleaning liquid onto the surface does not allow the cleaning liquid to penetrate the mask well. Moreover, the thickness of the battery cell is usually only about 100um, which is very fragile. During the cleaning liquid spraying process, a large spraying pressure cannot be used, resulting in a poorer spraying effect.

[0052] Based on this, the present invention adopts an immersion cleaning method, that is, the battery cell with the mask attached is immersed in the cleaning solution. The mask on the surface of the battery cell cannot directly contact oxygen, so that the mask can gradually soften and fully react with the cleaning solution, thereby causing the mask to decompose and peel off the battery cell.

[0053] The cleaning device 2000 according to an embodiment of the present invention will now be described.

[0054] like Figure 1 As shown, the cleaning device 2000 of this embodiment includes: an immersion tank 2100, a plurality of conveying roller mechanisms and a liquid blocking mechanism.

[0055] First, the soaking tank 2100 and the multiple conveying roller mechanisms will be described. The soaking tank 2100 is used to contain the cleaning solution, and a feed inlet allowing the solar cells to pass through is provided at one of the lateral ends of the soaking tank 2100. The multiple conveying roller mechanisms are at least partially located within the soaking tank 2100, and include an upper conveying roller 2210 and a lower conveying roller 2220 arranged vertically, with a predetermined gap between the upper conveying roller 2210 and the lower conveying roller 2220 to allow the solar cells to move laterally within the predetermined gap. It should be noted that the rollers are rotatable structures, consistent with the meaning of drums or rollers.

[0056] The plane through which the solar cells move within a predetermined gap is a horizontal conveying surface. The predetermined gap is adapted to the thickness of the solar cells. The conveying roller mechanism may include an upper roller and a lower roller. An upper conveying roller 2210 is sleeved on the upper roller, and a lower conveying roller 2220 is sleeved on the lower roller. The upper and lower rollers are longitudinally installed at both ends of the immersion tank 2100. A rotating mechanism drives the lower roller and / or the upper roller to rotate, thereby realizing the rotation of the upper roller and / or the lower roller, and thus enabling the transverse conveying of the solar cells.

[0057] The immersion tank 2100 contains cleaning fluid, which allows the battery cells with the mask attached to be immersed in the immersion tank 2100 to remove the mask.

[0058] The lower conveyor roller 2220 can drive the battery cell to move horizontally, so that it can pass through the soaking tank 2100. The upper conveyor roller 2210 can be spaced at a predetermined distance from the lower conveyor roller 2220, so that it can press down on the battery cell to prevent it from floating, thus keeping the battery cell continuously immersed in the cleaning solution. Moreover, the upper conveyor roller 2210 can increase the power of the battery cell movement.

[0059] Next, the liquid blocking mechanism will be described. The liquid blocking mechanism cooperates with the feed inlet, or two liquid blocking mechanisms cooperate with the feed inlet and the discharge outlet respectively. The liquid blocking mechanism includes an openable and closable liquid blocking member. The liquid blocking member opens when the battery cell passes through the feed inlet, so that the battery cell enters the soaking tank 2100 through the feed inlet, and closes when no battery cell passes through the feed inlet, so as to seal the feed inlet.

[0060] The immersion tank can hold the cleaning fluid to a height higher than a predetermined gap, allowing the battery cells to be immersed in the cleaning fluid. This height can be achieved by ensuring the cleaning fluid level is higher than the predetermined gap by ensuring the fluid supply rate to the cleaning tank is greater than or equal to the leakage rates at the inlet and outlet. The leakage rate can be reduced by installing a liquid-blocking mechanism at the inlet and / or outlet.

[0061] The liquid-blocking component opens when the battery cell passes through and closes when no battery cell passes through. The battery cell can enter the predetermined gap of the conveying roller mechanism through the feed inlet. That is, the liquid-blocking component opens when the battery cell passes through the feed inlet to allow the battery cell to pass through and enter the predetermined gap of the conveying roller mechanism in the soaking tank 2100. When no battery cell passes through the feed inlet, the component closes to prevent excessive loss of cleaning liquid in the soaking tank 2100, thereby maintaining the liquid level of the cleaning liquid in the soaking tank 2100 above the predetermined gap.

[0062] Two liquid-blocking mechanisms can be configured, one at the inlet and one at the outlet. The liquid-blocking mechanism opens when a battery cell passes through the outlet and closes when no battery cell is passing through. This facilitates the entry and exit of the battery cells from the soaking tank while preventing excessive outflow of cleaning solution. It should be noted that the above is only an optional example; the liquid-blocking mechanism can also be configured only at the inlet, with the outlet using a robotic arm or similar method to directly pick up the battery cells. All of these modifications should be understood as falling within the scope of this invention.

[0063] The cleaning equipment 2000 described above includes an immersion tank 2100 containing the cleaning solution. Multiple conveying rollers are installed within the electroplating tank, allowing the upper and lower conveying rollers to move the solar cells laterally. The immersion tank can hold the cleaning solution to a height exceeding a predetermined gap, ensuring that the solar cells with the mask attached are completely immersed in the cleaning solution. The liquid-blocking mechanism opens when a solar cell passes through the inlet and closes when no solar cell passes through, reducing leakage at the inlet and maintaining the cleaning solution level above the predetermined gap. This allows the mask on the solar cell to gradually soften and fully react with the cleaning solution, ultimately causing the mask to decompose and peel off the solar cell. Therefore, the mask on the surface of the solar cell can be removed efficiently and thoroughly.

[0064] In some embodiments of the present invention, the liquid-blocking component includes a liquid-blocking roller mechanism, which includes an upper liquid-blocking roller 2310 and a lower liquid-blocking roller 2320 that abut against each other.

[0065] Optionally, the upper liquid-blocking roller 2310 can move up and down and roll, and / or the lower liquid-blocking roller 2320 can move up and down and roll, and the battery cell enters the immersion tank 2100 through the contact point between the upper liquid-blocking roller 2310 and the lower liquid-blocking roller 2320.

[0066] Optionally, the upper liquid-blocking roller can move up and down, and / or the lower liquid-blocking roller can move up and down, and the battery cell enters the immersion tank through the contact point between the upper liquid-blocking roller and the lower liquid-blocking roller.

[0067] like Figure 2 As shown, the liquid-blocking roller mechanism may include an upper liquid-blocking shaft and a lower liquid-blocking shaft longitudinally arranged on the side wall of the soaking tank 2100, an upper liquid-blocking roller 2310 sleeved on the upper liquid-blocking shaft, and a lower liquid-blocking roller 2320 sleeved on the lower liquid-blocking shaft. The side wall of the soaking tank 2100 may have grooves at corresponding positions at both ends of the upper liquid-blocking shaft to accommodate the ends of the upper liquid-blocking shaft and / or the lower liquid-blocking shaft, thereby enabling the upper liquid-blocking shaft to move up and down and roll.

[0068] The lower liquid-blocking roller 2320 can abut against the side walls at both ends of the immersion tank 2100. The upper liquid-blocking roller 2310 can press down on the lower liquid-blocking roller 2320 by gravity, or it can be connected to the upper and lower liquid-blocking rollers by an elastic component (spring, etc.), thereby causing the upper and lower liquid-blocking rollers 2310 to abut against each other. As the battery cell passes the abutment point, the friction between itself and the upper roller causes the upper liquid-blocking roller 2310 to roll and move upward while the lower liquid-blocking roller 2320 rolls and moves upward while the battery cell passes the abutment point, thereby opening the upper and lower liquid-blocking rollers 2310 and 2320. After the battery cell passes the abutment point, the upper liquid-blocking roller 2310, under its own gravity, abuts against the lower liquid-blocking roller 2320 again, thereby closing the upper and lower liquid-blocking rollers 2310 and 2320.

[0069] It should be noted that rolling during the up-and-down movement of the upper and / or lower liquid-blocking rollers reduces cell friction (the rolling friction on the cell is less than the sliding friction) compared to simple up-and-down movement, thus preventing damage to the cell due to sliding friction. Alternatively, the upper and / or lower liquid-blocking rollers may not roll during their up-and-down movement; they can simply move up and down to open and close the feed inlet. All of these variations should be understood within the scope of this invention.

[0070] The battery cells can be inserted into the contact point. There are several ways to insert the battery cells into the contact point. For example, the battery cells can be inserted manually, driven by upper and lower rollers, or driven by a conveyor belt.

[0071] Optionally, a discharge port is provided at the other end of the immersion tank 2100 in the lateral direction. The battery cells enter the immersion tank 2100 through the inlet and leave the immersion tank 2100 through the discharge port. Two liquid-blocking mechanisms cooperate with the inlet and the discharge port, respectively.

[0072] Upper and lower liquid-blocking rollers are installed at the discharge port. When the battery cells pass through the upper and lower liquid-blocking rollers located at the discharge port, the squeezing action of the upper and lower liquid-blocking rollers can reduce leakage from the soaking tank 2100 and remove the cleaning liquid adhering to the surface of the battery cells.

[0073] In some embodiments of the present invention, the liquid-blocking component includes a liquid-blocking plate 2120, which is hinged to the side wall of the soaking tank 2100 located near the inlet 2110. When the battery cell passes through the inlet 2110, the liquid-blocking plate 2120 can move to pass through the inlet 2110. After the battery cell passes through, the liquid-blocking plate 2120 can return to prevent the cleaning fluid from flowing out. Alternatively, the liquid-blocking component includes a water-blocking plate 2140 that can be raised and lowered at the inlet 2110. The water-blocking plate 2140 rises when the battery cell passes through the inlet to open the inlet and falls after the battery cell passes through the inlet to close the inlet.

[0074] like Figure 3 As shown in Figure a, the liquid-blocking plate 2120 is hinged to the side wall of the immersion tank 2100 via a hinge 2130. The battery cell abuts against the liquid-blocking plate 2120 through the inlet 2110 and moves forward, allowing it to enter the conveyor roller position of the immersion tank 2100, thus opening the liquid-blocking plate 2120. After the battery cell has moved a certain distance, the liquid-blocking plate 2120 closes again due to water pressure, covering the inlet 2110. The liquid-blocking plate 2120 can be made of a flexible material to facilitate the passage of the battery cell.

[0075] like Figure 3 As shown in Figure b, the water shield 2140 is raised and lowered by a lifting mechanism 2150 (motor or cylinder). The battery cells pass through the feed inlet 2110. The lifting mechanism 2150 rises, allowing the battery cells to pass through. After the battery cells have passed through, the water shield 2140 opens, and the lifting mechanism 2150 descends, closing the water shield 2140. A sensor can be installed at the feed inlet 2110 to detect the battery cells. The lifting mechanism 2150 rises when the sensor detects a battery cell and descends when the sensor does not detect a battery cell.

[0076] In some embodiments of the present invention, the cleaning device 2000 includes multiple sets of conveying roller mechanisms. Each set of conveying roller mechanisms includes multiple lower conveying rollers 2220 and upper conveying rollers 2210 arranged laterally. The two upper conveying rollers 2210 are respectively located directly above the two upper conveying rollers 2210 at the two ends of the multiple lower conveying rollers 2220 laterally.

[0077] like Figure 4 As shown in Figure a, each conveying mechanism includes three lower conveying rollers 2220 arranged laterally (first lower roller, second lower roller, and third lower roller arranged in sequence) and two upper conveying rollers 2210 (first upper roller and second upper roller arranged on the first roller and the third roller). Reducing the number of upper conveying rollers 2210 can increase the contact area between the battery cell and the cleaning fluid, improve the cleaning efficiency, and does not affect the lateral transport of the battery cell.

[0078] It should be noted that the above are just optional examples; each group of conveyor mechanisms may also include four horizontally arranged ( Figure 4 (As shown in Figure b) or five lower conveying rollers 2220 and two upper conveying rollers 2210, all of which should be understood to be within the scope of the present invention.

[0079] In some embodiments of the present invention, the cleaning device 2000 further includes multiple sets of cleaning nozzles, which are laterally spaced apart in the lateral gaps of multiple conveying roller mechanisms. Each set of cleaning nozzles includes an upper cleaning nozzle 2410 and a lower cleaning nozzle 2420 arranged opposite each other. The upper cleaning nozzle 2410 is positioned above and facing the predetermined gap, and the lower cleaning nozzle 2420 is positioned below and facing the predetermined gap. Cleaning fluid is sprayed through the upper cleaning nozzle 2410 and the lower cleaning nozzle 2420.

[0080] like Figure 4As shown, the first nozzle of the upper cleaning nozzle 2410 and the second nozzle of the lower cleaning nozzle 2420 are symmetrically arranged. During the process of the battery cell passing through the first and second nozzles, both the first and second nozzles spray cleaning fluid onto the battery cell, forming a scouring force on the mask on the surface of the battery cell, accelerating the peeling of the mask on the surface of the battery cell. Moreover, the symmetrical arrangement of the first and second nozzles can make the battery cell be subjected to uniform force from top to bottom, avoiding the situation where the battery cell is only subjected to force on the upper or lower surface and thus breaks.

[0081] Optionally, the first nozzle is located below the top of the upper conveyor roller (e.g., Figure 4 In region E of Figure a), the second nozzle is located above the bottom end of the lower conveyor roller 2220 (e.g., in region E of Figure a). Figure 4 (Region F in Figure b) makes the cleaning fluid sprayed from the first and second nozzles have a strong impact on the battery cells.

[0082] Optionally, the first nozzle is positioned below the upper surface of the cleaning solution contained in the immersion tank 2100, so that both the first and second nozzles are located below the cleaning solution, thus preventing outside air from being introduced into the cleaning solution and generating bubbles that would reduce cleaning efficiency. The nozzles are immersed in the cleaning solution to spray the cleaning solution onto the battery cells. Due to the obstruction of the liquid, the impact force on the battery cells is reduced, thereby reducing the breakage rate of the battery cells.

[0083] It should be noted that the above are merely optional examples. The cleaning equipment may also include only an upper cleaning nozzle or a lower cleaning nozzle to clean the battery cells, and these should all be understood to be within the scope of this invention.

[0084] Optionally, a liquid supply mechanism (the mechanism that provides cleaning fluid) is connected to the cleaning nozzle via a pipeline, thereby providing cleaning fluid to the cleaning nozzle.

[0085] Furthermore, the cleaning equipment 2000 also includes a cleaning fluid tank that contains cleaning fluid and is connected to a cleaning nozzle to supply cleaning fluid to the nozzle.

[0086] like Figure 1 As shown, the cleaning fluid is contained in the cleaning fluid tank, connected to the first end of the pump through one pipe, and connected to the cleaning nozzle through another pipe, so that the cleaning fluid can be smoothly supplied to the cleaning nozzle.

[0087] Furthermore, the cleaning fluid tank includes a first cleaning fluid tank 2510 and a second cleaning fluid tank 2520, through which cleaning fluid is supplied to the cleaning nozzle.

[0088] like Figure 1A first valve 2511 and a second valve 2521 can be installed. The first end of the first valve 2511 is connected to the first cleaning fluid tank 2510, and the second end of the second valve 2521 is connected to the second cleaning fluid tank 2520. Opening the first valve 2511 and closing the second valve 2521 allows cleaning fluid to be supplied to the cleaning nozzles through the first cleaning fluid tank 2510. Conversely, opening the second valve 2521 and closing the first valve 2511 allows cleaning fluid to be supplied to the cleaning nozzles through the second cleaning fluid tank 2520. Therefore, while maintaining one cleaning fluid tank, the other can be used to supply cleaning fluid to the cleaning nozzles, thereby improving efficiency.

[0089] In some embodiments of the present invention, the bottom of the soaking tank 2100 is formed in the shape of a funnel, and the soaking tank 2100 has a drain outlet at its bottom end.

[0090] The funnel shape is a structure that is high around the edges and low in the middle. Due to gravity, the membrane sludge will accumulate at the lower port of the funnel-shaped soaking tank 2100. The bottom of the soaking tank 2100 corresponds to this lower port, and a drain port is set at the bottom to facilitate the timely discharge of the membrane sludge.

[0091] The cleaning system according to an embodiment of the present invention will now be described.

[0092] The cleaning system includes cleaning equipment 2000 and filtration equipment 3000 (e.g.) Figure 1 and Figure 5 (as shown), or includes a cleaning device 2000 and a membrane sludge separation device 1000, or includes a cleaning device 2000, a filtration device 3000 and a membrane sludge separation device 1000 (as shown). Figure 10 (As shown). The cleaning equipment 2000 is any of the cleaning equipment described above. Optionally, a drain outlet is provided at the bottom of the soaking tank.

[0093] The filtration unit 3000 is used to filter the first substance, enabling the reuse of the cleaning solution. The membrane sludge separation unit 1000 is used to separate the first substance, separating the cleaning solution and membrane sludge. The cleaning solution can be reused, and the membrane sludge can be treated separately, thereby reducing costs.

[0094] The first substance, second substance, third substance, fourth substance, fifth substance, sixth substance, seventh substance and eighth substance mentioned below are all mixtures of membrane sludge and cleaning fluid, the difference being the difference in the proportion between membrane sludge and cleaning fluid.

[0095] The first substance is the substance flowing out of the soaking tank (it can be directly discharged from the drain port at the bottom of the soaking tank or sucked out through the adsorption port of the suction device). The second substance is the substance after the first substance has been filtered by the cleaning liquid filtration device (the main component is the cleaning liquid). The third substance is the substance remaining after the first substance is blocked by the filter element of the cleaning liquid filtration device (the main component is membrane sludge). The fourth substance is the substance after the third substance has been filtered by the membrane sludge separation device (the main component is the cleaning liquid). The fifth substance is the substance remaining on the conveyor belt 1110 after the first or third substance has been filtered by the conveyor belt 1110 (the main component is the membrane sludge). The sixth substance is the substance that has permeated the conveyor belt 1110 after the first substance has been filtered by the conveyor belt 1110 (the main component is the cleaning liquid). The seventh substance is the substance remaining after the fifth substance has been squeezed by the extruder or centrifuged by the centrifuge (the main component is the membrane sludge). The eighth substance is the substance discharged during the process of the fifth substance being squeezed by the extruder or centrifuged by the centrifuge (the main component is the cleaning liquid).

[0096] The filtration device according to an embodiment of the present invention will now be described.

[0097] like Figure 5 As shown, the cleaning system of this embodiment includes a soaking device 2000 and a filtration device 3000, wherein the filtration device 3000 includes a suction device and a spraying device.

[0098] First, the suction device is described. The suction device includes an adsorption port 3110, through which a first substance is adsorbed. The first substance is a mixture of cleaning liquid and membrane sludge. When there is only one adsorption port 3110, the adsorption port 3110 is located above the bottom of the soaking tank 2100 and faces the bottom of the soaking tank 2100, or is connected to the bottom of the soaking tank 2100. When there are multiple adsorption ports 3110, some adsorption ports 3110 are located above the bottom of the soaking tank 2100 and face the bottom of the soaking tank, while other adsorption ports 3110 are connected to the bottom of the soaking tank 2100, or are located above the bottom of the soaking tank 2100 and, or are all connected to the bottom of the soaking tank 2100.

[0099] In addition to the adsorption port, the adsorption device also includes an adsorption pump and an adsorption pipeline. One end of the adsorption pipeline is connected to the adsorption pump, and the other end is connected to the adsorption port. The operation of the adsorption pump creates adsorption force, thereby adsorbing the first substance.

[0100] The immersion tank 2100 contains cleaning solution. The battery cells (with the mask attached) are cleaned in the cleaning solution. During the cleaning process, the mask on the surface of the battery cells will peel off, forming film residue, which falls to the bottom of the immersion tank 2100.

[0101] The adsorption port 3110 can promptly remove the first substance from the bottom of the soaking tank 2100, preventing excessive accumulation of membrane residue in the soaking tank 2100, which would reduce the cleaning effect of the cleaning solution and result in the inability to clean the mask on the surface of the battery cell.

[0102] Among them, such as Figure 6 As shown in Figure a, the adsorption port 3110 can be positioned above and adjacent to the bottom of the soaking tank 2100, drawing the first substance contained at the bottom of the soaking tank 2100 out of the soaking tank 2100. This creates an upward suction force on the first substance located at the bottom of the soaking tank, facilitating the adsorption of membrane sludge from the first substance and preventing excessive adhesion of the membrane sludge due to its own weight alone at the bottom of the soaking tank. Figure 6 As shown in Figure b, the adsorption port 3110 can also be connected to the bottom of the soaking tank 2100, allowing the first substance contained at the bottom of the soaking tank 2100 to be removed from the soaking tank 2100. Consequently, the membrane sludge deposited at the bottom of the soaking tank gathers towards the adsorption port due to adsorption force, thus removing the membrane sludge deposited at the bottom of the soaking tank. When the adsorption port 3110 is connected to the bottom of the soaking tank 2100, the bottom of the soaking tank 2100 can form a funnel shape at the connection point with the adsorption port 3110. The funnel area at the bottom of the soaking tank 2100 can hold more membrane sludge. Due to its gravity and adsorption force, the membrane sludge is more likely to gather at the center of the adsorption port and be more easily removed, increasing the membrane sludge removal efficiency. The adsorption port 3110 can also be set both above the bottom of the soaking tank 2100 and connected to the bottom of the soaking tank 2100. That is, when there are multiple adsorption ports 3110, some adsorption ports are set above the bottom of the soaking tank 2100, and some are connected to the bottom of the soaking tank 2100. The adsorption port and the drain port are different.

[0103] Next, the spraying device will be described. The spraying device includes a spray nozzle 3120, which is disposed above and adjacent to the bottom of the soaking tank 2100.

[0104] The spray nozzle 3120 is located to the side of the adsorption port 3110 and at a predetermined distance from it. The spray nozzle 3120 sprays liquid or gas towards the area at the bottom of the soaking tank 2100 that can be adsorbed by the adsorption port 3110, thereby flushing the bottom of the soaking tank. The predetermined distance is the distance at which the liquid or gas sprayed from the spray nozzle 3120 can reach the vicinity of the adsorption port 3110.

[0105] The area that the adsorption port 3110 can adsorb refers to the area located at the bottom of the soaking tank covered by the adsorption stroke range of a single adsorption port 3110, or the total area enclosed by multiple areas located at the bottom of the soaking tank 2100 covered by the adsorption stroke range of multiple adsorption ports 3110.

[0106] For example, Figure 9 As shown, it includes four adsorption ports 3110. The adsorption range of a single adsorption port 3110 is A, and the area enclosed by multiple A areas is B. Then the spray port 3120 can be directed toward the area B at the bottom of the soaking tank.

[0107] In addition to the injection port 3120, the injection device also includes an injection power component and an injection pipe. The injection power component draws liquid or gas from the outside to the injection pipe and then ejects it from the injection port. The power component that draws liquid from the outside can be an injection pump, and the power component that draws gas from the outside can be a fan.

[0108] The adsorption port 3110 has a limited diameter and a limited adsorption range, making it impossible to remove all the membrane residue at the bottom of the soaking tank 2100 over a large area. Moreover, the membrane residue adheres to the bottom of the soaking tank 2100 and has an adhesive force with the bottom of the soaking tank 2100, making it even more difficult to remove.

[0109] In order to more comprehensively adsorb the membrane sludge that falls to the bottom of the soaking tank 2100, liquid or gas is sprayed from the spray nozzle 3120 of the spraying device toward the bottom of the soaking tank 2100 and toward the adsorption port 3110 (the spray nozzle 3120 is angled toward the adsorption port 3110). This creates a scouring force on the membrane sludge, peeling it off from the bottom of the soaking tank 2100 and moving it toward the adsorption port 3110, thereby increasing the adsorption range of the membrane sludge at the adsorption port 3110 and improving the adsorption capacity of the membrane sludge.

[0110] Finally, the filtration device is described. The filtration device is connected to the suction device to receive and filter the first substance drawn out from the suction port.

[0111] Therefore, it is possible to filter the first substance, and the filtered first substance can be reused, reducing the waste of cleaning fluid. Furthermore, the filtered membrane sludge can be centrally processed, avoiding the problem of excessively high treatment costs for discarded first substances containing too much cleaning fluid, thereby saving costs.

[0112] In the above-described filtration equipment, membrane sludge is deposited at the bottom of the soaking tank 2100. The adsorption port 3110 of the suction device removes the first substance containing a large amount of membrane sludge from the bottom of the soaking tank 2100. The spray port 3120 of the spraying device sprays liquid or gas towards the bottom of the soaking tank 2100 and towards the adsorption port 3110, creating a scouring force on the membrane sludge, peeling it off from the bottom of the soaking tank 2100 and moving it towards the adsorption port 3110, thereby increasing the adsorption range of the adsorption port 3110 and improving its adsorption capacity. This reduces the amount of membrane sludge in the soaking tank 2100, reduces contamination of the cleaning solution by the membrane sludge, and saves costs.

[0113] In some embodiments of the present invention, the suction device includes a plurality of adsorption ports 3110 arranged at intervals, and the spraying device includes a plurality of spraying ports 3120 corresponding one-to-one with the plurality of adsorption ports 3110. Each adsorption port 3110 includes at least one adsorption port 3110, and each spraying port 3120 includes at least one spraying port 3120.

[0114] Multiple sets of adsorption ports 3110 and multiple sets of spray ports 3120 can better cover the bottom of the soaking tank 2100, increase the cleaning area of ​​the membrane residue in the soaking tank 2100, and increase the cleaning ability of the cleaning solution in the soaking tank 2100 to continuously clean the battery cells (battery cells, etc.).

[0115] Furthermore, each group of adsorption ports 3110 includes one adsorption port 3110, and each group of spray ports 3120 includes two spray ports 3120. The two spray ports 3120 in each group are respectively arranged on both sides of the adsorption port 3110. Alternatively, each group of adsorption ports 3110 includes one adsorption port 3110, and each group of spray ports 3120 includes three or four spray ports 3120. A group of spray ports 3120 is arranged around one adsorption port 3110.

[0116] like Figure 7 As shown, each set of adsorption ports 3110 includes one adsorption port 3110, and each set of injection ports 3120 includes two injection ports 3120 distributed on both sides of the adsorption port 3110.

[0117] like Figure 8 As shown in Figure a, each group of adsorption ports 3110 includes one adsorption port 3110, and each group of injection ports 3120 includes three injection ports 3120 arranged around the adsorption port 3110.

[0118] like Figure 8 As shown in Figure b, each group of adsorption ports 3110 includes one adsorption port 3110, and each group of injection ports 3120 includes four injection ports 3120 arranged around the adsorption port 3110.

[0119] This allows for a further increase in the range and capacity of the adsorption membrane residue at the adsorption port 3110.

[0120] In some embodiments of the present invention, the filtration device includes a first conduit 3210 and a cleaning fluid filtration device 3300. The cleaning fluid filtration device 3300 is connected to the first conduit 3210 to filter a first substance from the first conduit 3210.

[0121] like Figures 10 to 12 As shown, the cleaning fluid filtration device 3300 receives a first substance from the first pipeline 3210. The cleaning fluid filtration device 3300 separates the membrane sludge and cleaning fluid in the first substance. After the first substance is filtered by the cleaning fluid filtration device 3300, a second substance with a lower proportion of membrane sludge flows out, along with other substances with a higher proportion of membrane sludge remaining in the cleaning fluid filtration device 3300. Thus, the first substance can be filtered, facilitating centralized treatment of membrane sludge and enabling the use of the cleaning fluid.

[0122] Furthermore, the filtration device also includes a second pipeline 3220. The first end of the second pipeline 3220 is connected to the cleaning liquid filtration device 3300 to output a second substance that has passed through the cleaning liquid filtration device 3300. The second substance is the substance after the first substance has been filtered by the cleaning liquid filtration device 3300. The second end of the second pipeline 3220 is connected to the spraying device.

[0123] A second substance with a lower proportion of membrane sludge is separated from the first substance by a filtration device. The second substance is then fed into a spraying device and sprayed into the soaking tank 2100 through a spray nozzle 3120. This maintains the level of the cleaning solution in the soaking tank 2100 and continuously reduces the content of membrane sludge contained in the soaking tank 2100.

[0124] In some embodiments of the present invention, the cleaning fluid filtration device 3300 includes a plurality of devices, which are connected in sequence to filter the first substance from the first pipeline 3210 in sequence. The filtration aperture of the downstream cleaning fluid filtration device 3300 is smaller than that of the upstream cleaning fluid filtration device 3300.

[0125] like Figure 11 As shown, the cleaning solution filtration device 3300 includes two units, which sequentially filter the first substance. The pore size of the filter holes in the rear cleaning solution filtration device 3300 is the same as that in the front cleaning solution filtration device 3300. The front cleaning solution filtration device 3300 performs coarse filtration of the first substance, while the rear cleaning solution filtration device 3300 performs fine filtration. This results in a lower proportion of membrane sludge in the output of the second substance from the cleaning solution filtration device 3300, further reducing the content of membrane sludge in the soaking tank 2100.

[0126] It should be noted that the above are just optional examples. The cleaning fluid filtration device 3300 may also include three, four or five, and these should all be understood to be within the scope of the present invention.

[0127] In some embodiments of the present invention, the cleaning fluid filtration device 3300 includes a cylindrical body 3310 and a filter element 3330. The cylindrical body 3310 is used to contain a first substance. A feed port 3361 is formed at the top of the cylindrical body 3310 and a discharge port 3362 is formed at the bottom. The first substance is received from the first pipeline 3210 through the feed port 3361, and a second substance is supplied to the second pipeline 3220 through the discharge port 3362. The filter element 3330 is disposed inside the cylindrical body 3310. The filter element 3330 is formed into a hollow cylindrical shape. The first substance flows into the hollow area of ​​the filter element 3330 from the feed port 3361 and flows out through the side wall of the filter element 3330 to the discharge port 3362.

[0128] like Figure 12 As shown, the filter element 3330 is formed as a hollow cylinder, that is, the central part of the axial direction is formed as a hollow region. The cylinder 3310 houses the filter element 3330. The first substance flows into the hollow region through the feed port 3361 of the cylinder 3310. The first substance flows out of the filter element 3330 along the side wall of the filter element 3330, thereby reaching the discharge port 3362 of the cylinder 3310, and then flows out through the second pipe 3220.

[0129] The internal space of the cylinder 3310 can form an intermediate chamber (corresponding to the hollow area), a filtration area (corresponding to the filter element 3330), and an outer ring water outlet chamber (the space between the filter element 3330 and the inner wall of the cylinder 3310).

[0130] Filter element 3330 can filter the first substance and prevent membrane residue exceeding the pore size of its filter holes from flowing out to discharge port 3362.

[0131] The filter element 3330 and the housing 3310 can be detachable, making it easy to replace the filter element 3330.

[0132] Furthermore, the cleaning fluid filtration device 3300 also includes a cover 3320, a cleaning paddle, a drive mechanism 3350, and a controller. The cover 3320 covers the top of the cylinder 3310, and a vent 3365 is formed at the top of the cover 3320. The cleaning paddle passes through the middle of the cover 3320 and is housed in a hollow area. The cleaning paddle contacts the inner wall of the filter element 3330 to clean the filter element 3330. The drive mechanism 3350 is mounted on the cover 3320 and connected to the cleaning paddle to drive its rotation. The controller is connected to the drive mechanism 3350 to control the rotation of the cleaning paddle. The drive mechanism 3350 can be a motor, a rotary cylinder, or a hydraulic rotation mechanism.

[0133] The cap 3320 covers the top of the cylinder 3310 to prevent external contaminants from contaminating the cleaning fluid inside the cylinder 3310. An exhaust port 3365 is provided on the cap 3320 to expel gas from the cylinder 3310. The first pipe carries some gas into the cylinder 3310. When the cylinder 3310 and the cap are completely sealed, the gas occupies space inside the cylinder 3310, reducing the capacity of the cylinder 3310 to hold the first substance. To solve this problem, an exhaust port 3365 is provided on the cap 3320 to promptly expel the gas from the cylinder 3310, improving the filtration efficiency of the cleaning fluid filtration device 3300.

[0134] An exhaust valve can be installed on the exhaust port 3365. When the first substance is supplied to the cylinder 3310 via the first pipeline 3210, the exhaust valve is opened, and closed at other times. Alternatively, a check valve can be installed on the exhaust port 3365. This check valve allows gas inside the cylinder 3310 to escape while preventing external gas from entering. Therefore, while promptly venting gas from the cylinder 3310, it also reduces the contamination of the cleaning fluid inside the cylinder 3310 by external pollutants.

[0135] During the filtration process of the first substance through filter element 3330, the membrane deposits in the first substance will be adsorbed onto the inner wall of filter element 3330. The controller controls the drive mechanism 3350 to rotate the cleaning paddle. The cleaning paddle contacts the inner wall of filter element 3330, cleaning the membrane deposits adsorbed onto the inner wall of filter element 3330. The rotation of the cleaning paddle can create a downward flow force on the first substance (similar to the blades of a water pump, which draws the upstream liquid downstream). The membrane deposits will accelerate downward accumulation, reducing clogging of filter element 3330 during use and increasing filtration efficiency.

[0136] Furthermore, the cleaning paddle includes a rotating shaft 3341 and blades 3342. The rotating shaft 3341 is vertically arranged and its top end is connected to a drive mechanism 3350. The blades 3342 are arranged around the rotating shaft 3341 and include scrapers or brushes.

[0137] The drive mechanism 3350 drives the rotating shaft 3341 to rotate, and the rotating shaft 3341 drives the connected blade 3342 to rotate. The blade 3342 contacts the inner wall of the filter element 3330, thereby cleaning the inner wall of the filter element 3330. Thus, a cleaning blade can be used to easily clean the filter element 3330.

[0138] In some embodiments of the present invention, a first drain port 3363 is formed at the bottom of the cylinder 3310. The filtration device also includes a first drain valve 3363a connected to the first drain port 3363. Opening the first drain valve 3363a allows the discharge of a third substance, which is the residue of the first substance that is blocked by the filter element of the cleaning liquid filtration device 3300.

[0139] By opening the first drain valve 3363a, the third substance settled at the bottom of the cylinder 3310 can be discharged, reducing the amount of membrane sludge inside the cylinder 3310 and achieving self-cleaning.

[0140] Furthermore, the operation mode of the filtration equipment includes a first mode and a second mode. The controller is also connected to the first drain valve 3363a and switches between the first mode and the second mode based on predetermined conditions. In the first mode, the controller drive mechanism 3350 drives the cleaning paddle to rotate and closes the first drain valve 3363a. In the second mode, the controller controls the drive mechanism 3350 to drive the cleaning paddle to rotate and opens the first drain valve 3363a. The predetermined conditions are a predetermined self-cleaning interval time period, or the first pipeline 3210 stops supplying liquid, or the cleaning liquid filtration device 3300 also includes a differential pressure gauge, which tests the pressure difference between the inflow pressure of the first substance and the outflow pressure of the second substance, and the pressure difference reaches a predetermined value.

[0141] The first mode is the normal operation mode, in which the controller drive mechanism 3350 drives the cleaning paddle to rotate and closes the first drain valve 3363a, allowing membrane debris to gradually accumulate at the bottom of the cylinder 3310. The second mode is the self-cleaning mode, in which the controller controls the drive mechanism 3350 to drive the cleaning paddle to rotate and opens the first drain valve 3363a to discharge the membrane debris accumulated at the bottom of the cylinder 3310, reducing the amount of membrane debris inside the cylinder 3310.

[0142] The controller switches between the first mode and the second mode based on predetermined conditions. These predetermined conditions can include the following three:

[0143] 1) The controller automatically switches to the second mode when the time period in the first mode reaches the set self-cleaning interval, based on the filter settings.

[0144] 2) The controller stops supplying liquid to the cylinder 3310 through the first pipeline 3210 and automatically switches to the second mode.

[0145] 3) The cleaning fluid filtration device 3300 also includes a differential pressure gauge, which measures the pressure difference between the inflow pressure of the first substance and the outflow pressure of the second substance. When the pressure difference reaches a predetermined value, the controller automatically switches to the second mode when the pressure difference reaches the predetermined value during operation in the first mode according to the filtration settings.

[0146] This allows for mode switching, preventing excessive accumulation of membrane debris in the cylinder 3310 and reducing the amount of membrane debris inside the cylinder 3310.

[0147] Furthermore, a second drain port 3364 is formed at the bottom of the cylinder 3310, which is spaced apart from the first drain port 3363. The filtration device also includes a second drain valve 3364a connected to the second drain port 3364.

[0148] During maintenance, the second drain valve 3364a can be opened to drain the contents of the cylinder 3310 to the outside through the second drain port 3364 and the second drain valve 3364a, so as to thoroughly clean the cylinder and facilitate maintenance.

[0149] In some embodiments of the present invention, the cleaning equipment further includes a third pipeline 3230, a membrane sludge separation device 1000, and a fourth pipeline 3240. The third pipeline 3230 is connected to a first drain valve 3363a. The membrane sludge separation device 1000 is connected to the third pipeline 3230 to filter a third substance. The first end of the fourth pipeline 3240 is connected to the membrane sludge separation device 1000, and its second end is connected to a spray port 3120 to introduce a fourth substance, which is the substance remaining after the third substance has been filtered by the membrane sludge separation device 1000.

[0150] The third substance is filtered by the membrane sludge separation device 1000 to separate the membrane sludge in the third substance. The fourth substance, which contains less membrane sludge, is then introduced into the fourth pipeline 3240 and the injection port 3120, and finally injected into the soaking tank 2100 to increase the liquid level in the soaking tank 2100 and reduce the waste of cleaning solution.

[0151] The membrane sludge separation device 1000 according to an embodiment of the present invention will now be described.

[0152] like Figures 13 to 23 As shown, the membrane sludge separation device 1000 of this embodiment includes: a conveyor belt 1110, a first drive shaft 1120, a second drive shaft 1130, and a membrane sludge collector 1400.

[0153] First, the first drive shaft 1120, the second drive shaft 1130, and the conveyor belt 1110 are described. The first drive shaft 1120 and the second drive shaft 1130 are laterally spaced apart. The conveyor belt 1110 surrounds the first drive shaft 1120 and the second drive shaft 1130, and the conveyor belt 1110 can reciprocate around the first drive shaft 1120 and the second drive shaft 1130. The conveyor belt forms a first filter screen, receiving a first substance and / or a third substance flowing in from above it. The reciprocating motion can be... Figure 14 The movement is shown by the arrow in Figure a. The conveyor belt 1110 can receive the first substance directly through the drain port at the bottom of the soaking tank, or it can receive the third substance through the third pipeline, or it can simultaneously receive the first substance through the drain port at the bottom of the soaking tank and the third substance through the third pipeline.

[0154] The conveyor belt 1110 is provided with first filter holes, forming a first filter screen. In operation, the conveyor belt 1110 receives a first substance flowing in from above and filters it. The filtered membrane sludge is conveyed by the conveyor belt 1110 to a preset membrane sludge discharge position, and the filtered cleaning fluid flows into a preset cleaning fluid collection point. The first substance mainly includes membrane sludge and cleaning fluid, and may also include fragments of the battery cell and other impurities; wherein, the membrane sludge is a mask peeled off from the surface of the battery cell.

[0155] Definition: such as Figure 15 As shown, the conveyor belt 1110 located above the first drive shaft 1120 and the second drive shaft 1130 is the upper conveyor belt 1112, and the conveyor belt 1110 located below the first drive shaft 1120 and the second drive shaft 1130 is the lower conveyor belt 1113. The surface of the inner ring of the annular conveyor belt 1110 is the lower surface of the conveyor belt 1110, and the surface of the outer ring of the annular conveyor belt 1110 is the upper surface of the conveyor belt 1110.

[0156] Specifically, the conveyor belt 1110 includes an upper conveyor belt 1112, corner belts 1114, and a conveyor belt. The upper conveyor belt 1112 and the lower conveyor belt 1113 are arranged vertically at intervals and parallel to each other. The two ends of the upper conveyor belt 1112 and the lower conveyor belt 1113 are connected by two corner belts 1114, which are respectively wrapped around the first drive shaft 1120 and the second drive shaft 1130.

[0157] The upper conveyor belt 1112 receives and filters the first substance flowing in from above. The upper conveyor belt 1112 then transports the filtered fifth substance along a preset direction to a preset membrane sludge discharge position, and discharges the filtered cleaning liquid into a preset cleaning liquid collection point. The preset direction for conveying the membrane sludge is either horizontal or inclined at an angle to the horizontal; preferably, the angle between the inclined direction and the horizontal direction is less than 60 degrees. More specifically, the preset direction is... Figure 13 The horizontal direction in the middle. Among them, a membrane sludge collector 1400 can be set at the preset membrane sludge discharge position, and the cleaning liquid collection point can be the collection tank below the upper conveyor belt 1112.

[0158] The first substance is the mixture of membrane sludge and cleaning fluid after the mask is peeled off from the battery cell by the cleaning fluid in the cleaning equipment 2000. The first substance flows into the conveyor belt 1110 and is filtered by the conveyor belt 1110, which can separate the membrane sludge and cleaning fluid in time, and prevent the membrane sludge and cleaning fluid from continuing to react and causing the effective components in the cleaning fluid to continuously decrease. The cleaning fluid obtained after filtration by the conveyor belt 1110 can be provided to the cleaning equipment 2000 for reuse, thereby reducing the waste of cleaning fluid.

[0159] Optionally, the conveyor belt 1110 is formed into a ring structure, and the preset direction for conveying the membrane sludge is as follows: Figure 13 The material is filtered horizontally to the right. The upper conveyor belt 1112 performs the initial filtration of the first substance, and the lower conveyor belt 1113 performs the second filtration of the first substance. The two filtrations can improve the filtration effect.

[0160] The conveyor belt 1110 is formed into a ring structure. A first drive shaft 1120 passes through the first transverse end of the conveyor belt 1110, and a second drive shaft 1130 passes through the second transverse end of the conveyor belt 1110. The first drive shaft 1120 and the second drive shaft 1130 provide a predetermined tension to the conveyor belt 1110 and drive the conveyor belt 1110 to rotate cyclically. The transverse movement of a portion of the conveyor belt 1110 can cause the fifth substance located on its upper surface to move laterally, thereby transferring the fifth substance out. The portion of the conveyor belt 1110 can be the upper conveyor belt 1112 mentioned above. The first material is received at the first transverse end or the middle of the conveyor belt 1110, so the first transverse end or the middle of the conveyor belt 1110 is regarded as the feed end of the conveyor belt 1110; the first material is filtered by the conveyor belt 1110 to form the fifth material, and the fifth material is discharged from the second transverse end of the conveyor belt 1110, so the second transverse end of the conveyor belt 1110 is regarded as the discharge end of the conveyor belt 1110.

[0161] It should be noted that the above are just optional examples, such as... Figure 14 As shown, in addition to the first drive shaft 1120 and the second drive shaft 1130, the membrane sludge separation device may also include other drive shafts (such as...). Figure 14 (See Figures a, b, and c in the diagram). Among the multiple drive shafts, the second drive shaft is the drive shaft at the transverse end. There is no limitation on the power transmission shaft; it can be the first drive shaft, the second drive shaft, or other drive shafts, as long as they can drive the conveyor belt to reciprocate.

[0162] Next, the membrane sludge collector will be described. The membrane sludge collector 1400 is provided at the discharge end of the conveyor belt 1110 to receive the fifth substance conveyed by the discharge end of the conveyor belt 1110. The fifth substance is the substance that remains on the conveyor belt after the first substance has been filtered by the conveyor belt 1110. The fifth substance mainly includes membrane sludge, and may also include fragments of the battery cells and other impurities.

[0163] In other words, the membrane sludge collector 1400 is located below the discharge end of the transverse conveyor belt 1110. Due to its gravity, the fifth substance will fall into the membrane sludge collector 1400 after being conveyed to the discharge end of the conveyor belt 1110. By collecting the membrane sludge through the membrane sludge collector 1400, the membrane sludge can be centrally processed, avoiding the pollution caused by the membrane sludge scattering.

[0164] In the membrane sludge separation device 1000 of the above embodiment, the first drive shaft 1120 and the second drive shaft 1130 drive the annular conveyor belt 1110 to rotate cyclically. The conveyor belt 1110 receives the first substance flowing in from above. The first substance is filtered through two layers of filtration: the upper conveyor belt 1112 and the lower conveyor belt 1113. The filtered cleaning liquid can be reused in the cleaning equipment 2000, thereby reducing waste of the cleaning liquid. The fifth substance remaining on the conveyor belt 1110 is laterally conveyed by the conveyor belt 1110 and falls into the membrane sludge collector 1400 for subsequent centralized treatment of the membrane sludge. Thus, the membrane sludge separation device 1000 can easily and efficiently filter the first substance to achieve membrane sludge separation. The filtered cleaning liquid can be collected and reused, realizing the recycling of the cleaning liquid, reducing waste of the cleaning liquid, and lowering costs.

[0165] It should be noted that the above are just optional examples, such as... Figure 23 As shown, the first transmission shaft, the second drive shaft, and the conveyor belt can be replaced by the first transmission net 1610 and the second transmission net 1620.

[0166] The first transmission network 1610 and the second transmission network 1620 are arranged vertically and alternately, and both can switch between a horizontal state and a tilted state. The tilted state can be a downward tilted state or a flipped state.

[0167] A first moving mechanism is connected to a first conveyor belt 1610 to drive the first conveyor belt 1610 to move laterally, thereby reciprocating between the first receiving position and the first unloading position. A second moving mechanism is connected to a second conveyor belt 1620 to drive the second conveyor belt 1620 to move laterally, thereby reciprocating between the second receiving position and the second unloading position. The first and second moving mechanisms may include a linear module (motor-driven) or an electric cylinder module (electric cylinder-driven).

[0168] The first and second receiving positions correspond to the stations for receiving the first material, and the first and second pouring positions correspond to the stations for pouring the fifth material. The first conveyor belt 1610 at the first receiving position and the second conveyor belt 1620 at the second receiving position are both in a horizontal state to receive and move the first material laterally. At the first pouring position, the first conveyor belt 1610 and the second conveyor belt 1620 switch from a horizontal state to a downward tilting state to pour the fifth material. After pouring the fifth material, the tilting state returns to a horizontal state.

[0169] When the first conveyor 1610 is in the receiving position, the second conveyor 1620 is in the unloading position; when the first conveyor 1610 is in the unloading position, the second conveyor 1620 is in the receiving position.

[0170] The first substance is filtered through the first transmission network 1610 and the second transmission network 1620.

[0171] The membrane sludge collector 1400 corresponds to the first and second discharge positions to receive the fifth material poured from the first conveyor network 1610 and the second conveyor network 1620.

[0172] After the fifth substance falls from the discharge end of conveyor belt 1110 into membrane sludge collector 1400, a small amount of the fifth substance remains on conveyor belt 1110. The fifth substance mainly consists of membrane sludge, which is also easily adhered to conveyor belt 1110 after being filtered and separated by it. The fifth substance remaining on conveyor belt 1110 can clog the filter pores, affecting the filtration effect of conveyor belt 1110.

[0173] Accordingly, in some embodiments of the present invention, the membrane sludge separation device 1000 further includes a cleaning device. The cleaning device is located adjacent to the discharge end of the conveyor belt 1110. The cleaning device is capable of removing the fifth substance remaining on the conveyor belt 1110, thereby preventing the filter pores on the conveyor belt 1110 from becoming clogged.

[0174] Specifically, the cleaning device is located near the second drive shaft 1130 (the second drive shaft 1130 is near the discharge end of the conveyor belt 1110) to clean the conveyor belt 1110 located at or below the end of the second drive shaft 1130 and sweep the fifth material on the conveyor belt 1110 to the membrane sludge collector 1400.

[0175] The structure of cleaning devices can vary greatly, for example Figure 13 and Figure 19 The two structures shown.

[0176] like Figure 13 As shown, the cleaning device includes a blower 1210. The blower 1210 is adjacent to the second drive shaft 1130 and faces the lower surface of the conveyor belt 1110 located below the second drive shaft 1130 to blow the fifth material on the upper surface of the conveyor belt 1110 to the membrane sludge collector 1400. The blower 1210 is disposed in the inter-belt lateral gap between the upper conveyor belt 1112 and the lower conveyor belt 1113.

[0177] like Figure 13As shown, the blower 1210 is located in the area enclosed by the inner ring of the conveyor belt 1110 and is adjacent to the second drive shaft 1130. It blows gas towards the conveyor belt 1110 located below the second drive shaft 1130 and toward the membrane sludge collector 1400. The gas passes through the lower surface of the lower conveyor belt 1113 and is blown out to the upper surface of the lower conveyor belt 1113, thereby blowing the fifth substance located on the upper surface of the lower conveyor belt 1113 off to the membrane sludge collector 1400, thereby cleaning the conveyor belt 1110. The upper conveyor belt 1112 initially filters the first substance, and the lower conveyor belt 1113 filters the first substance again. During the second filtration process, a fifth substance may also adhere to the lower surface of the lower conveyor belt 1113. In this embodiment, the blower 1210 is located in the area enclosed by the inner ring of the conveyor belt 1110, and allows gas to pass through the lower surface of the lower conveyor belt 1113 and be blown out to the upper surface of the lower conveyor belt 1113. This can blow away the fifth substance adhering to the surface of the lower conveyor belt 1113, further improving the cleanliness and filtration effect of the conveyor belt 1110.

[0178] Optionally, the purger 1210 includes a longitudinally arranged purge pipe 1211, and the purge pipe 1211 has an air outlet formed along its axial direction, through which gas is blown out.

[0179] like Figure 16 As shown, in the longitudinal direction, i.e., the width direction of the conveyor belt 1110, the purge pipe 1211 can purge the entire width area of ​​the conveyor belt 1110, preventing the first filter screen of the conveyor belt 1110 from clogging. The purge pipe 1211 can also be an ion air pipe, blowing out plasma air to reduce static electricity. The air outlet can be... Figure 15 The slender blowing slit 1211a shown in Figure a can also be Figure 16 The structure of the multiple air vents 1211b shown in Figure b.

[0180] like Figure 19 As shown, the cleaning device includes a scraper 1220. The scraper 1220 abuts against the upper surface of the conveyor belt 1110, which is located at or below the end of the second drive shaft 1130, to scrape the fifth substance from the upper surface of the conveyor belt 1110 to the membrane sludge collector 1400.

[0181] The scraper 1220 can be made of rubber or silicone. One end of the scraper 1220 contacts the first filter screen of the conveyor belt 1110 to scrape off the fifth substance on the first filter screen, and the other end faces the membrane sludge collector 1400, thereby transferring the fifth substance to the membrane sludge collector 1400.

[0182] It should be noted that the above are only optional examples. The cleaning device can also be a water spraying device to rinse the first filter screen of the conveyor belt 1110 with water. That is, any device that can clean the conveyor belt 1110 should be understood to be within the scope of the present invention.

[0183] In a preferred embodiment, the cleaning device includes at least two of the following structures: a blower 1210, a scraper 1220, and a water spraying device, to achieve secondary or multiple cleaning and improve the cleaning effect.

[0184] According to some embodiments of the present invention, the membrane sludge separation device 1000 further includes a second filter screen 1300. The second filter screen 1300 is disposed below the conveyor belt 1110 to receive a sixth substance from the conveyor belt 1110, the sixth substance being the substance that has permeated through the conveyor belt 1110 after the first substance has been filtered by the conveyor belt 1110.

[0185] In other words, the sixth and fifth substances (the fifth substance comes from the material adhering to and falling off the lower conveyor belt 1113) are filtered through the second filter screen 1300, further separating the membrane sludge. The material filtered through the second filter screen 1300 contains less membrane sludge, making it easier to reuse the cleaning solution. Thus, the filtration effect can be further improved.

[0186] Furthermore, the first filter screen has a mesh size of 50-150, and the second filter screen 1300 has a mesh size of 70-200.

[0187] The first filter can be 60 mesh, 80 mesh, 100 mesh or 120 mesh, etc., and the second filter 1300 can be 80 mesh, 100 mesh, 130 mesh, 150 mesh or 180 mesh, etc.

[0188] Optionally, the second filter 1300 has a larger mesh size than the first filter, thereby achieving finer filtration.

[0189] That is, Figure 17 and Figure 18 As shown, the first filter screen has a smaller mesh size, meaning the first filter pore 1111 is larger, allowing relatively larger substances to pass through, and the first filter pore 1111 is less prone to clogging. The second filter screen has a larger mesh size, meaning the second filter pore 1310 is relatively smaller, achieving finer filtration.

[0190] According to some embodiments of the present invention, such as Figure 20 As shown, the membrane sludge collector 1400 includes a tank 1410 and a pump 1420. A fifth substance is received through the tank 1410. The pump 1420 is connected to the tank 1410 to extract the fifth substance from the tank 1410.

[0191] The fifth substance is received through tank 1410, thereby achieving the collection of the fifth substance containing membrane sludge. Pump 1420 extracts the fifth substance to prevent it from overflowing due to excessive deposition in tank 1410 and causing contamination.

[0192] Furthermore, the membrane sludge collector 1400 also includes a level sensor 1430 and a controller. The level sensor 1430 is disposed inside the tank 1410 to detect the level of the fifth substance in the tank 1410. The controller is connected to the level sensor 1430 and the pump 1420 to control the pump 1420 to extract the fifth substance when the level of the fifth substance detected by the level sensor 1430 reaches a predetermined level.

[0193] By sensing the liquid level of the fifth substance in the tank 1410 through the liquid level sensor 1430, the height of the fifth substance in the tank 1410 can be clearly determined. When the fifth substance reaches the predetermined liquid level in the tank 1410, the controller controls the pump 1420 to promptly extract the fifth substance from the tank 1410. Thus, the automated extraction of the fifth substance can be achieved, which is highly efficient and saves manpower.

[0194] Furthermore, the sidewall of the tank 1410 is inclined towards the center of the bottom of the tank 1410. The liquid level sensor 1430 includes a first electrode, a second electrode, and a continuity detection device. The first electrode and the second electrode are disposed separately within the tank 1410 and at a predetermined height from the bottom of the tank 1410, the predetermined height corresponding to a predetermined liquid level. The continuity detection device detects whether there is continuity between the first electrode and the second electrode.

[0195] A first electrode and a second electrode are set at a predetermined liquid level to sense the liquid level. The first and second electrodes can be metal sheets. A continuity detection device can test the resistance between the first and second electrodes, i.e., when the fifth substance accumulates to the point of contact with the first and second electrodes, the resistance decreases due to the liquid component of the fifth substance. Based on the resistance difference between the contact and non-contact points of the fifth substance, the liquid level at which the fifth substance in the tank 1410 reaches the contact point with the first and second electrodes is determined. The continuity detection device can also test the current between the first and second electrodes, i.e., when the fifth substance accumulates to the point of contact with the first and second electrodes, a current is generated when a certain voltage is applied between the first and second electrodes due to the liquid component of the fifth substance. When the current is detected, the liquid level at which the fifth substance reaches the contact point with the first and second electrodes is determined.

[0196] The heights of the first electrode and the second electrode from the bottom of the tank can be the same or different. If they are different, the height of the electrode with the higher distance from the bottom of the tank shall be the predetermined height.

[0197] Compared to other liquid level sensors 1430, such as pulse-type, ultrasonic, or infrared sensors, which are more prone to failure due to contamination by a fifth substance, this liquid level sensor 1430 can accurately detect the liquid level even when contaminated by a fifth substance, without affecting the continuity between the first and second electrodes, thus avoiding failure and exhibiting higher stability.

[0198] It should be noted that the above are only optional examples. Depending on actual needs, the pulse level sensor 1430, ultrasonic level sensor 1430 or infrared level sensor 1430 can be protected to avoid contamination by a fifth substance. Thus, the pulse level sensor 1430, ultrasonic level sensor 1430 or infrared level sensor 1430 can be selected. All of these should be understood to be within the scope of the present invention.

[0199] In some embodiments of the present invention, such as Figure 21 As shown, the membrane sludge separation device 1000 also includes a membrane sludge dewatering unit 1500. The membrane sludge dewatering unit 1500 includes a press or centrifuge, a membrane sludge collection box 1540, and a wastewater box 1530. The press receives a fifth substance drawn from the pump 1420 and presses it. The centrifuge receives the fifth substance drawn from the pump 1420 and centrifuges it. The membrane sludge collection box 1540 is connected to the press or centrifuge to receive a seventh substance, which is the residue remaining after the fifth substance has been pressed or centrifuged. The wastewater box 1530 is connected to the press to receive an eighth substance, which is the substance discharged during the pressing or centrifugation of the fifth substance.

[0200] like Figure 21 As shown, the membrane sludge dewatering unit 1500 includes a squeezer, a membrane sludge collection box 1540, and a wastewater box 1530. The squeezer squeezes the fifth substance drawn by the pump 1420, thereby squeezing the eighth substance (mainly liquid components) in the fifth substance into the wastewater box 1530, and causing the seventh substance (mainly dry membrane sludge) in the fifth substance to fall into the membrane sludge collection box 1540.

[0201] The membrane sludge dewatering unit 1500 may also include a centrifuge, a membrane sludge collection box 1540, and a wastewater box 1530. The centrifuge centrifuges the fifth substance collected by the pump 1420. The centrifuge may include a centrifuge cylinder and a driver. There are outlets distributed on the cylinder wall and / or bottom. The driver drives the centrifuge cylinder to rotate. The centrifuge cylinder drives the fifth substance to rotate. The eighth substance (mainly liquid components) is thrown out and flows through the outlet to the wastewater box 1530. The seventh substance (mainly dry membrane sludge) remains in the centrifuge cylinder, which is also the membrane sludge collection box 1540.

[0202] It should be noted that the above are merely optional examples of drying and dehydrating the fifth substance using a dryer; that is, any device capable of dehydrating the fifth substance should be understood to be within the scope of this invention.

[0203] Furthermore, the extruder is a screw conveyor extruder, which includes: an extrusion chamber 1523, a screw 1521, a helical blade 1522, and a rotating mechanism. The extrusion chamber 1523 receives the fifth substance. The screw 1521 connects to both ends of the extrusion chamber 1523. The helical blade 1522 is arranged around the screw 1521 and located within the extrusion chamber 1523. The rotating mechanism is connected to the screw 1521 to rotate the screw 1521, thereby driving the helical blade 1522 to rotate, thus extruding and conveying the fifth substance through the helical blade 1522.

[0204] like Figure 21 As shown, the extrusion chamber 1523 contains the fifth substance, and the membrane residue collection box 1540 is located below the discharge end of the extrusion chamber 1523. The rotating mechanism drives the screw 1521 to rotate, and the rotation of the screw 1521 drives the spiral blade 1522 to rotate. The spiral blade 1522 extrudes the fifth substance, thereby discharging the eighth substance from the extrusion chamber 1523 and conveying the seventh substance to the discharge end of the extrusion chamber 1523, where it falls into the membrane residue collection box 1540. Thus, the fifth substance can be easily extruded and conveyed.

[0205] In some embodiments of the present invention, the membrane residue dewatering unit 1500 further includes a third filter screen 1510 and a vibrator. The third filter screen 1510 is inclined and receives a fifth substance drawn from the pump 1420, and conveys the fifth substance into a press or centrifuge. The vibrator is connected to the third filter screen 1510 to vibrate the third filter screen 1510.

[0206] The fifth substance drawn by pump 1420 slides through the third filter 1510 into the squeezer or centrifuge. The inclined third filter 1510 reduces the resistance to the sliding of the fifth substance. Figure 22 As shown, the third filter screen includes a third filter hole 1511. The liquid in the third filter screen 1510 can also be filtered to reduce the liquid component in the fifth substance. Vibrating the third filter screen 1510 with a vibrator can accelerate the sliding of the fifth substance to the squeezer or centrifuge, preventing the fifth substance from accumulating on the third filter screen 1510. The vibration process also facilitates the penetration of the liquid component in the fifth substance into the third filter screen 1510.

[0207] Furthermore, the vibrator is a pneumatic vibrator, which can stably vibrate the third filter 1510 and has a long service life.

[0208] It should be noted that the vibrator can also be an electromagnetic vibrator, and these should all be understood to be within the scope of this invention.

[0209] The cleaning method of the present invention will now be described.

[0210] like Figure 24 As shown, the cleaning method includes:

[0211] Step S1: Provide a battery cell, which is a battery cell with a mask attached.

[0212] Step S2: Immerse the battery cells in the cleaning solution in the soaking tank to remove the mask attached to the battery cells.

[0213] Step S3: Spray liquid or gas into the bottom of the soaking tank to flush up the membrane residue deposited on the bottom of the soaking tank and suck out the first substance flushed up from the bottom of the soaking tank.

[0214] The solar cells are immersed in a cleaning solution to remove the mask, achieving immersion cleaning. Compared with spray cleaning, this method allows the mask on the solar cells to gradually soften and fully react with the cleaning solution, thereby decomposing and peeling the mask off the solar cells. This method can efficiently and thoroughly remove the mask from the surface of the solar cells.

[0215] In the process of adsorbing membrane sludge at the bottom of the soaking tank, due to the limited suction range, it is impossible to remove all the membrane sludge at the bottom of the soaking tank over a large area. Moreover, the membrane sludge adheres to the bottom of the soaking tank and has an adhesive force, making it even more difficult to remove.

[0216] In order to more comprehensively adsorb the membrane sludge that falls to the bottom of the soaking tank, liquid or gas is sprayed into the bottom of the soaking tank to create a scouring force on the membrane sludge, thereby peeling the membrane sludge off from the bottom of the soaking tank, thus increasing the range of membrane sludge adsorption and improving the adsorption capacity of the membrane sludge.

[0217] In some embodiments of the present invention, the cleaning method further includes passing the extracted first substance through a first filtration process to obtain a second substance as filtrate and a third substance as filter residue, and returning the second substance to the soaking tank. By subjecting the first substance containing membrane residue to the first filtration and returning the second substance, which has a larger proportion of cleaning solution, to the soaking tank, the content of membrane residue in the soaking tank is reduced while the cleaning solution in the soaking tank is replenished, avoiding waste of cleaning solution due to filtration.

[0218] Furthermore, the cleaning method also includes passing the third substance through a second filtration process to obtain a fourth substance as filtrate and a fifth substance as filter residue, and then returning the fourth substance to the soaking tank. By subjecting the third substance, which contains a higher proportion of membrane residue, to the second filtration, and returning the fourth substance, which contains a higher proportion of cleaning solution, to the soaking tank, the cleaning solution in the soaking tank can be replenished, further avoiding waste of cleaning solution due to filtration.

[0219] In some embodiments of the present invention, the cleaning method further includes discharging the first substance from the soaking tank, obtaining a sixth substance as filtrate and a fifth substance as filter residue through a second filtration process, and returning the sixth substance to the soaking tank. Returning the sixth substance, which has a larger proportion of the cleaning solution, to the soaking tank can replenish the cleaning solution in the soaking tank and further avoid waste of cleaning solution due to filtration.

[0220] In some embodiments of the present invention, the cleaning method further includes any one or a combination of the following:

[0221] (1) The first substance extracted is subjected to a first filtration process to obtain a second substance as filtrate and a third substance as filter residue. The second substance is returned to the soaking tank as liquid sprayed to the bottom of the soaking tank.

[0222] (2) The first substance extracted is filtered through a first filter to obtain a second substance as filtrate and a third substance as filter residue. The third substance is filtered through a second filter to obtain a fourth substance as filtrate and a fifth substance as filter residue. The fourth substance is returned to the soaking tank as liquid sprayed to the bottom of the soaking tank.

[0223] (3) The first substance in the soaking tank is discharged, and the sixth substance as the filtrate and the fifth substance as the filter residue are obtained after the second filtration treatment. The sixth substance is returned to the soaking tank as liquid sprayed to the bottom of the soaking tank.

[0224] The first substance is filtered using three methods, and the filtrate with a higher proportion of the filtered cleaning solution is returned to the soaking tank to avoid excessive waste of the cleaning solution due to filtration. Furthermore, the filtration precision can be selected according to the required precision. For example, the first and second filtration processes can have the same or different precision. When different, it can be coarse filtration and fine filtration. Coarse filtration can more efficiently replenish the cleaning solution in the soaking tank, but the filtrate contains more impurities. Fine filtration can obtain a filtrate with fewer impurities, but the efficiency of replenishing the cleaning solution in the soaking tank is lower.

[0225] In some embodiments of the present invention, the cleaning method further includes dehydrating the third substance and / or the fifth substance.

[0226] By dehydration, the third and / or fifth substances can be converted from a wet membrane state to a dry membrane state. The waste treatment cost of the membrane sludge in the dry membrane state is lower, thus saving costs.

[0227] In some embodiments of the present invention, in step S2, the cleaning solution is sprayed onto the battery cells immersed in the cleaning solution.

[0228] Based on immersion cleaning, the sprayed cleaning fluid creates a scouring force on the mask on the surface of the battery cell, accelerating the removal of the mask from the battery cell surface.

[0229] In some embodiments of the present invention, the cleaning method further includes any one or a combination of the following:

[0230] (1) The first substance extracted is subjected to a first filtration process to obtain a second substance as filtrate and a third substance as filter residue. The second substance is used as a cleaning solution sprayed onto the battery cells immersed in the cleaning solution and returned to the soaking tank.

[0231] (2) The first substance extracted is filtered through a first filter to obtain a second substance as filtrate and a third substance as filter residue. The third substance is filtered through a second filter to obtain a fourth substance as filtrate and a fifth substance as filter residue. The fourth substance is used as a cleaning solution sprayed onto the battery cells immersed in the cleaning solution and returned to the soaking tank.

[0232] (3) The first substance in the soaking tank is discharged and the sixth substance as filtrate and the fifth substance as filter residue are obtained after the second filtration treatment. The sixth substance is returned to the soaking tank as the cleaning liquid sprayed on the battery cells immersed in the cleaning liquid.

[0233] The first substance is filtered using three methods, and the filtrate with a higher proportion of the filtered cleaning solution is returned to the soaking tank to avoid excessive waste of the cleaning solution due to filtration. Furthermore, the filtration precision can be selected according to the required precision. For example, the first and second filtration processes can have the same or different precision. When different, it can be coarse filtration and fine filtration. Coarse filtration can more efficiently replenish the cleaning solution in the soaking tank, but the filtrate contains more impurities. Fine filtration can obtain a filtrate with fewer impurities, but the efficiency of replenishing the cleaning solution in the soaking tank is lower.

[0234] In some embodiments of the present invention, the cleaning method further includes the following methods:

[0235] (1) The first substance extracted is subjected to a first filtration process to obtain a second substance as filtrate and a third substance as filter residue. The second substance is used as a cleaning solution sprayed onto the battery cells immersed in the cleaning solution and returned to the soaking tank.

[0236] (2) The first substance extracted is filtered through a first filter to obtain a second substance as filtrate and a third substance as filter residue. The third substance is filtered through a second filter to obtain a fourth substance as filtrate and a fifth substance as filter residue. The fourth substance is returned to the soaking tank as liquid sprayed to the bottom of the soaking tank.

[0237] (3) Discharge the first substance from the soaking tank, and obtain the sixth substance as filtrate and the fifth substance as filter residue after the second filtration process. Return the sixth substance to the soaking tank as liquid sprayed to the bottom of the soaking tank.

[0238] The first filtration process is fine filtration, and the second filtration process is coarse filtration.

[0239] The filtrate with different impurity contents is returned to the soaking tank for classification and use. The second substance with lower impurity content is used as the cleaning solution sprayed onto the battery cells immersed in the cleaning solution and returned to the soaking tank. The fourth and sixth substances with higher impurity contents are used as the liquid sprayed to the bottom of the soaking tank and returned to the soaking tank, which improves the utilization efficiency of the returned liquid in the soaking tank.

[0240] In some embodiments of the present invention, in conjunction with the cleaning equipment and cleaning system described in the foregoing embodiments, the first filtration process may employ a filtration device and / or a membrane sludge separation device 1000, the second filtration process may employ a filtration device and / or a membrane sludge separation device 1000, and the membrane sludge dewatering unit 1500 in the membrane sludge separation device 1000 may be used to dewater the third substance and / or the fifth substance. For example, the first filtration process may employ a filtration device, and the second filtration process may employ a membrane sludge separation device 1000.

[0241] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cleaning system, characterized in that, include: Cleaning equipment, the cleaning equipment comprising: An immersion tank for containing cleaning solution, wherein a feed inlet is provided at one lateral end of the immersion tank to allow the battery cells to pass through; Multiple conveying roller mechanisms are located at least partially within the soaking tank, and each includes an upper conveying roller and a lower conveying roller arranged vertically, with a predetermined gap between the upper and lower conveying rollers to allow the battery cell to move laterally within the predetermined gap. A liquid blocking mechanism is provided, which cooperates with the inlet of the soaking tank. The soaking tank is capable of holding the cleaning liquid to a height higher than the predetermined gap. The liquid blocking mechanism includes an openable and closable liquid blocking member. The liquid blocking member opens when the battery cell passes through the inlet to allow the battery cell to enter the soaking tank through the inlet, and closes when no battery cell passes through the inlet to seal the inlet. A filtration device for filtering a first substance; The filtration device includes: A suction device includes an adsorption port for adsorbing the first substance. When there is one adsorption port, the adsorption port is located above the bottom of the soaking tank and faces the bottom of the soaking tank. When there are multiple adsorption ports, some of the adsorption ports are located above the bottom of the soaking tank and face the bottom of the soaking tank, and other adsorption ports are connected to the bottom of the soaking tank, or all of them are located above the bottom of the soaking tank and face the bottom of the soaking tank. A spraying device, comprising a spray nozzle disposed above and adjacent to the bottom of the soaking tank, the spray nozzle being located to the side of the adsorption port and at a predetermined distance from the adsorption port, the spray nozzle spraying liquid or gas toward the area in the bottom of the soaking tank that the adsorption port can adsorb, to flush the bottom of the soaking tank. A filtration device, connected to the suction device, for receiving and filtering the first substance drawn out by the adsorption port; The first substance is a mixture of cleaning solution and membrane residue in the soaking tank.

2. The cleaning system according to claim 1, characterized in that, The other end of the soaking tank is provided with a discharge port that allows the battery cells to pass through. The liquid blocking mechanism includes two components, which respectively cooperate with the discharge port and the inlet.

3. The cleaning system according to claim 1 or 2, characterized in that, The liquid-blocking component includes: A liquid-blocking roller mechanism, comprising an upper liquid-blocking roller and a lower liquid-blocking roller that abut against each other. The upper liquid-blocking roller is capable of moving up and down and rolling, and / or the lower liquid-blocking roller is capable of moving up and down and rolling, allowing the battery cell to enter the immersion tank through the contact point between the upper and lower liquid-blocking rollers, or... The upper liquid-blocking roller can move up and down, and / or the lower liquid-blocking roller can move up and down, allowing the battery cell to enter the immersion tank through the contact point between the upper and lower liquid-blocking rollers.

4. The cleaning system according to claim 1, characterized in that, The liquid-blocking component includes a liquid-blocking plate, which is hinged to the side wall of the soaking tank near the feed inlet. The liquid-blocking plate can be moved to pass through the feed inlet after the battery cell has passed through. The liquid-blocking plate can return to close the feed inlet after the battery cell has passed through. Alternatively, the liquid-blocking component includes a water-blocking plate that is retractable at the inlet, the water-blocking plate rising as the battery cell passes through the inlet to open the inlet, and falling down after the battery cell passes through the inlet to close the inlet.

5. The cleaning system according to claim 1, characterized in that, The cleaning equipment includes multiple sets of conveying roller mechanisms. Each set of conveying roller mechanisms includes multiple lower conveying rollers arranged laterally and two upper conveying rollers. The two upper conveying rollers are located directly above the two lower conveying rollers at the two ends of the multiple lower conveying rollers.

6. The cleaning system according to claim 1, characterized in that, The cleaning equipment also includes: Multiple sets of cleaning nozzles are laterally spaced and arranged in the lateral gaps of multiple conveying roller mechanisms. Each set of cleaning nozzles includes an upper cleaning nozzle and / or a lower cleaning nozzle. The upper cleaning nozzle is positioned above and facing the predetermined gap, and the lower cleaning nozzle is positioned below and facing the predetermined gap. Cleaning fluid is sprayed through the upper cleaning nozzle and the lower cleaning nozzle. When each set of cleaning nozzles includes the upper cleaning nozzle and the lower cleaning nozzle, the upper cleaning nozzle and the lower cleaning nozzle are symmetrically arranged.

7. The cleaning system according to claim 6, characterized in that, When the soaking tank contains the cleaning solution, both the first nozzle of the upper cleaning nozzle and the second nozzle of the lower cleaning nozzle can be located within the cleaning solution.

8. The cleaning system according to claim 6, characterized in that, The cleaning equipment also includes: A cleaning fluid tank contains the cleaning fluid and is connected to the cleaning nozzle to supply the cleaning fluid to the cleaning nozzle.

9. The cleaning system according to claim 8, characterized in that, The cleaning fluid tank includes a first cleaning fluid tank and a second cleaning fluid tank, through which the cleaning fluid is supplied to the cleaning nozzle.

10. The cleaning system according to claim 1, characterized in that, The suction device includes multiple sets of suction ports arranged at intervals, and the spraying device includes multiple sets of spraying ports corresponding one-to-one with the multiple sets of suction ports. Each set of suction ports includes at least one suction port, and each set of spraying ports includes at least one spraying port.

11. The cleaning system according to claim 10, characterized in that, Each group of adsorption ports includes one adsorption port, and each group of injection ports includes two injection ports. The two injection ports in each group are respectively arranged on both sides of the adsorption port. Alternatively, each group of adsorption ports includes one adsorption port, and each group of injection ports includes three or four injection ports. A group of injection ports is arranged around one adsorption port.

12. The cleaning system according to claim 1, characterized in that, The filtration device includes: A first pipeline, the first pipeline being connected to the suction device; A cleaning fluid filtration device is connected to the first pipeline to filter a first substance from the first pipeline.

13. The cleaning system according to claim 12, characterized in that, The filtration device further includes: The second pipeline has its first end connected to the cleaning fluid filtration device to output a second substance that has passed through the cleaning fluid filtration device. The second substance is the substance after the first substance has been filtered by the cleaning fluid filtration device. The second end of the second pipeline is connected to the spraying device.

14. The cleaning system according to claim 12 or 13, characterized in that, The cleaning fluid filtration device includes multiple devices, which are connected in sequence to filter the first substance from the first pipeline in sequence. The pore size of the downstream cleaning fluid filtration device is smaller than that of the upstream cleaning fluid filtration device.

15. The cleaning system according to claim 12, characterized in that, The cleaning fluid filtration device includes: A cylindrical body is used to contain the first substance. A feed port is formed at the top of the cylindrical body and a discharge port is formed at the bottom. The feed port receives the first substance from the first pipeline, and the discharge port supplies the second substance to the second pipeline. A filter element is disposed inside the cylinder and is formed into a hollow cylindrical shape. The first substance flows into the hollow area of ​​the filter element from the feed port and flows out through the filter element to the discharge port.

16. The cleaning system according to claim 15, characterized in that, The cleaning fluid filtration device further includes: A cylinder cover that covers the top of the cylinder body, and an exhaust port is formed on the top of the cylinder cover; A cleaning paddle passes through the center of the cylinder cover and is housed in the hollow area, and the cleaning paddle is in contact with the inner wall of the filter element; A drive mechanism is disposed on the cylinder cover and connected to the cleaning paddle to drive the cleaning paddle to rotate, thereby causing the first substance contained in the cylinder to flow downward. A controller connected to the drive mechanism to control the drive mechanism to rotate the cleaning paddle.

17. The cleaning system according to claim 16, characterized in that, The cleaning agent includes: A rotating shaft, which is vertically arranged and whose top end is connected to the driving mechanism; The blades are arranged around and around the rotation axis, and the blades include scrapers or brushes.

18. The cleaning system according to claim 16, characterized in that, A first drain outlet is formed at the bottom of the cylinder. The filtration device further includes a first drain valve connected to the first drain outlet. Opening the first drain valve allows the discharge of a third substance, which is the residue left by the first substance after it was blocked by the filter element of the cleaning liquid filtration device.

19. The cleaning system according to claim 18, characterized in that, The cleaning fluid filtration device operates in two modes: a first mode and a second mode. The controller is also connected to the first drain valve and switches between the first mode and the second mode based on predetermined conditions. In the first mode, the controller's drive mechanism drives the cleaning paddle to rotate and closes the first drain valve. In the second mode, the controller controls the drive mechanism to rotate the cleaning paddle and opens the first drain valve. The predetermined conditions are a predetermined self-cleaning interval time period, or the first pipeline stops supplying liquid, or the cleaning liquid filtration device further includes a differential pressure gauge, which measures the pressure difference between the inflow pressure of the first substance and the outflow pressure of the second substance, and the pressure difference reaches a predetermined value.

20. The cleaning system according to claim 19, characterized in that, The cleaning system includes the filtration device and the membrane sludge separation device, and the filtration device further includes: The third pipeline is connected to the first drain valve, and the membrane sludge separation device is connected to the third pipeline. The membrane sludge separation device is also used to separate the cleaning liquid and membrane sludge in the third substance. The fourth pipeline has its first end connected to the membrane sludge separation device and its second end connected to the injection port to introduce a fourth substance into the injection port. The fourth substance is a substance whose main component is cleaning liquid after the third substance has been separated by the membrane sludge separation device.

21. The cleaning system according to claim 18, characterized in that, The bottom of the cylinder is also provided with a second drain port that is spaced apart from the first drain port, and the filtration device also includes a second drain valve connected to the second drain port.

22. The cleaning system according to claim 1, characterized in that, The cleaning system includes a membrane sludge separation device, which includes: A first drive shaft and a second drive shaft are arranged laterally spaced apart. A conveyor belt surrounds the first drive shaft and the second drive shaft, and the conveyor belt is capable of reciprocating cyclical motion around the first drive shaft and the second drive shaft. The conveyor belt forms a first filter screen, through which the first substance flowing in from above is received. A membrane sludge collector is provided corresponding to the discharge end of the conveyor belt to receive a fifth substance conveyed by the discharge end of the conveyor belt. The fifth substance is the substance that the first substance has been filtered by the conveyor belt and remains on the conveyor belt.

23. The cleaning system according to claim 22, characterized in that, The membrane sludge separation equipment also includes: A cleaning device, located near the discharge end of the conveyor belt, is provided to sweep the fifth substance on the conveyor belt onto the membrane sludge collector.

24. The cleaning system according to claim 23, characterized in that, The cleaning device includes: A blower, located adjacent to the second drive shaft and facing the lower surface of the conveyor belt below the second drive shaft, blows the fifth material from the upper surface of the conveyor belt to the membrane sludge collector, the second drive shaft being adjacent to the discharge end of the conveyor belt.

25. The cleaning system according to claim 24, characterized in that, The purger includes a longitudinally arranged purge tube, and the purge tube has an air outlet formed along its axial direction, through which gas is blown out.

26. The cleaning system according to claim 23, characterized in that, The cleaning device includes: A scraper abuts against the upper surface of the conveyor belt, which is disposed at or below the end of the second drive shaft, to scrape the fifth substance from the upper surface of the conveyor belt to the membrane sludge collector, the second drive shaft being adjacent to the discharge end of the conveyor belt.

27. The cleaning system according to claim 22, characterized in that, Membrane sludge separation equipment also includes: A second filter screen is disposed below the conveyor belt to receive a sixth substance and the fifth substance from the conveyor belt. The sixth substance is the substance that has permeated the conveyor belt after the first substance has been filtered by the conveyor belt.

28. The cleaning system according to claim 27, characterized in that, The first filter screen has a mesh size of 50-150, and the second filter screen has a mesh size of 80-200.

29. The cleaning system according to claim 22, characterized in that, The membrane sludge collector includes: A tank through which the fifth substance is received; A pump connected to the tank to extract the fifth substance from the tank.

30. The cleaning system according to claim 29, characterized in that, The membrane sludge collector also includes: A liquid level sensor is disposed in the tank to detect the liquid level of the fifth substance in the tank; A controller, connected to the liquid level sensor and the pump, controls the pump to extract the fifth substance based on the liquid level detected by the liquid level sensor reaching a predetermined liquid level.

31. The cleaning system according to claim 30, characterized in that, The sidewall of the tank slopes towards the center of the bottom of the tank, and the liquid level sensor includes: A first electrode and a second electrode are disposed separately in the tank and at a predetermined height from the bottom of the tank, the predetermined height corresponding to the predetermined liquid level; A continuity detection device is provided to detect whether there is continuity between the first electrode and the second electrode.

32. The cleaning system according to claim 29, characterized in that, It also includes a membrane sludge dewatering unit, which comprises: An extruder or centrifuge, wherein the extruder receives the fifth substance from the pump and extrudes the fifth substance, and the centrifuge receives the fifth substance from the pump and centrifugally rotates the fifth substance; A membrane residue collection box is connected to the extruder or centrifuge to receive a seventh substance, which is the residue remaining after the fifth substance has been extruded by the extruder or centrifuged by the centrifuge. A wastewater box, connected to the squeezer, is used to receive an eighth substance, which is the substance discharged by the fifth substance after being squeezed by the squeezer or centrifuged by the centrifuge.

33. The cleaning system according to claim 32, characterized in that, The extruder is a screw conveyor extruder, which includes: The extrusion chamber receives the fifth substance. A screw, the screw connecting both ends of the extrusion chamber; Helical blades, the helical blades being arranged around the screw and located within the extrusion chamber; A rotating mechanism is connected to the screw to rotate the screw, thereby driving the helical blades to rotate, and extruding and conveying the fifth substance through the helical blades.

34. The cleaning system according to claim 32, characterized in that, The membrane residue dewatering device also includes: The third filter screen is inclined and receives the fifth substance drawn from the pump through the third filter screen and conveys the fifth substance into the extruder or centrifuge. A vibrator connected to the third filter screen to vibrate the third filter screen.

35. The cleaning system according to claim 34, characterized in that, The vibrator is a pneumatic vibrator.

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