Split type filter element for filtering battery slurry

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By designing the split battery slurry filter element, only the filter mesh needs to be replaced and the support tube is retained, which solves the problem of frequent replacement of existing filter elements, and achieves lower production costs and longer service life.

CN222489190UActive Publication Date: 2025-02-18YIBIN XINJIYUAN ELECTRONIC TECH CO LTD

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Patent Information

Application Number: CN202421271187.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-05
Publication Date: 2025-02-18
Estimated Expiration: 2034-06-05

AI Technical Summary

Technical Problem

The existing battery slurry filter element needs to be replaced frequently, resulting in increased production costs. The filter element cannot be replaced only when replacing the integrated filter element, wasting other reusable components.

Method used

A split filter element is designed, including a support tube and a tubular filter. The filter and support tube are connected by a connecting head and a press head for quick disassembly, and only the filter needs to be replaced to retain the support tube.

Benefits of technology

Through the split design, only replacing the filter when the filter is blocked or damaged can save the cost of replacing the filter element and extend the service life of the filter element.

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Abstract

The utility model relates to the technical field of lithium battery production, and provides a split type filter element for filtering battery slurry, the specific technical scheme is that the split type filter element comprises a supporting tube and a tubular filter screen, material passing holes are formed in the tube wall of the supporting tube, and connectors are arranged at the two ends of the supporting tube; the tubular filter screen comprises a filter screen body and supporting rings arranged at the two ends of the filter screen body. The tubular filter screen is arranged on the outer side of the supporting pipe in a penetrating and sleeving mode, pressing heads connected through threads are arranged on the two connectors, annular pressing grooves are formed between the pressing heads and the supporting pipe and / or the connectors, the supporting ring is connected into the annular pressing grooves in a pressing mode, and the filter screen body and the supporting pipe are connected through the connectors and the pressing heads. And meanwhile, quick disassembly can be realized, only the filter screen body needs to be disassembled for replacement when the filter element is replaced, and the part of the supporting pipe is reserved, so that the replacement cost is saved.

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Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, and more specifically to a split filter element for filtering battery slurry. Background Art

[0002] The quality of battery slurry has an important impact on the performance and life of the battery. Therefore, the quality requirements for battery slurry are extremely high. It is necessary to remove impurities and undispersed particles through filtration to ensure the uniformity and stability of the slurry, improve the quality and performance of the battery, and extend the service life of the battery.

[0003] As the main component of battery slurry filtration, the filter element needs to be replaced frequently to ensure the filtering effect. If the filter is running continuously, the frequency of filter element replacement can reach 3-5 times a day. Currently, most filter elements on the market are manufactured in one piece and need to be replaced as a whole. The cost of replacing the entire filter element will eventually be included in the production cost of the battery, so reducing the cost of this process is an urgent problem to be solved. Utility Model Content

[0004] One object of the utility model is to provide a split filter element for battery slurry filtration to solve the above problems. The split filter element comprises a support tube and a tubular filter screen. A feed hole is provided on the tube wall of the support tube. Connectors are provided at both ends of the support tube. The tubular filter screen comprises a filter screen body and support rings provided at both ends of the filter screen body.

[0005] The tubular filter is sleeved on the outside of the support tube, and the two connectors are provided with pressure heads connected by threads, an annular pressure groove is formed between the pressure head and the support tube and / or the connector, and the support ring is crimped in the annular pressure groove.

[0006] Furthermore, the connecting head is annular, and an external thread for connecting to the pressure head is provided on the upper part of its outer wall, and a boss is provided between the support tube and the external thread; an internal thread is provided on the inner wall of the connecting head, and the internal thread is used to connect to a plug or a negative pressure device.

[0007] Furthermore, the split filter element further comprises a fastening assembly, the fastening assembly comprises a washer and a top ring, the top ring is provided with a plurality of through holes for screws to pass through, the pressure head is provided with screw holes corresponding to the through holes; the side wall of the pressure head located in the annular pressure groove is provided with an inclined surface for increasing the opening of the annular pressure groove;

[0008] During installation, the washer abuts against the inclined surface, and the top ring is fixed to the pressure head by screws.

[0009] Furthermore, the feed holes are evenly distributed on the support tube, and the feed holes are elliptical holes, and the major axis direction of the ellipse is consistent with the length direction of the support tube.

[0010] Furthermore, a plurality of groups of the feed holes are evenly arranged along the circumference of the support tube, and two adjacent groups of the feed holes are staggered so that the support tube bodies without the feed holes are cross-connected in an X shape.

[0011] Furthermore, the filter body is connected to the support ring by bonding or welding, and the filter body is made by weaving steel wire strips, and the steel wire forms an angle of 30 degrees to 60 degrees with the horizontal line.

[0012] Furthermore, the filter body is provided with reinforcing ribs, and the reinforcing ribs are aligned with the X-shaped cross-connecting portion of the support tube body.

[0013] As described above, the utility model provides a split filter element for battery slurry filtration, which connects the filter body and the support tube by providing a connector and a pressure head, while enabling quick disassembly. When replacing the filter element, only the filter body needs to be removed for replacement, while the support tube part is retained, thus saving replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be more fully understood through the following detailed description in conjunction with the accompanying drawings, in which like elements are numbered in a similar manner, wherein:

[0015] Figure 1 This is a schematic diagram of the overall structure of a split filter element according to an embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the split filter element of the embodiment of the utility model;

[0017] Figure 3 This is a perspective structural diagram of a split filter element according to an embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of a split filter element according to an embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the explosion structure of the split filter element of the embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the enlarged structure of the connector support ring portion of an embodiment of the utility model;

[0021] Figure 7 This is a schematic diagram of the cutaway structure of the pressure head of an embodiment of the utility model;

[0022] Figure 8(a) is an enlarged view of the arrangement of an elliptical feed hole on the support tube of an embodiment of the utility model;

[0023] Figure 8 (b) is an enlarged view of another arrangement state of elliptical feeding holes on the support tube of the embodiment of the utility model;

[0024] Fig. 9 (a) is an enlarged schematic diagram of the filter body of an embodiment of the utility model;

[0025] Fig. 9 (b) is an enlarged schematic diagram of the filter body provided with reinforcing ribs in the embodiment of the utility model.

[0026] In the figure: 10 - filter body; 11 - reinforcing rib; 12 - support ring; 20 - support tube; 21 - feed hole; 31 - connector; 311 - boss; 32 - pressure head; 321 - inclined surface; 322 - screw hole; 33 - plug; 41 - washer; 42 - top ring; 43 - screw. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is further described in detail below through embodiments and in combination with the accompanying drawings, but the utility model is not limited to the following embodiments.

[0028] The manufacture and sale of battery slurry filter elements on the market are mostly carried out in an integrated form. The inventor of the present invention found during use that the filter element needs to be replaced because the filter screen is clogged, damaged, etc., and the other components of the filter element can continue to be used. If only the filter screen can be replaced, it will greatly save costs.

[0029] A commonly used battery slurry filtering device filters by negative pressure absorption. Specifically, a filter element is installed in the slurry pool, one end of the filter element is connected to a negative pressure pipe, and the other end of the filter element is blocked. Under the action of negative pressure, the slurry passes through the filter net and is then collected. This solution is based on the filter element used in the device and has made corresponding improvements.

[0030] like Figure 1-7 As shown, in order to solve the above problems, this embodiment provides a split filter element for battery slurry filtration, including a support tube 20 and a tubular filter screen, wherein a feed hole 21 is provided on the tube wall of the support tube 20, and connectors 31 are provided at both ends of the support tube 20; the tubular filter screen includes a filter screen body 10 and support rings 12 provided at both ends of the filter screen body 10;

[0031] The tubular filter is inserted into the outside of the support tube 20, and the two connectors 31 are provided with pressure heads 32 connected by threads. An annular pressure groove is formed between the pressure head 32 and the support tube 20 and / or the connector 31, and the support ring 12 is crimped in the annular pressure groove.

[0032] Since the size and density of the material holes 21 will be displayed in the corresponding structure, the material holes 21 are not shown in the structural diagram.

[0033] The filter body 10 is supported at the ends by the support ring 12 and then sleeved onto the support tube 20; it should be understood that after the pressure head 32 is installed on the connecting head 31, an annular groove is formed between the pressure head 32 and the support tube 20, or between the pressure head 32 and the connecting head 31, or between the pressure head 32 and the support tube 20 and the connecting head 31, and the support ring 12 is crimped into the annular groove, so that the filter body 10 can be disassembled and replaced by removing the pressure head 32, and the support tube 20 can be reused after cleaning, which greatly saves the cost of replacing the filter element.

[0034] As a preferred solution, the connecting head 31 is annular, and the upper part of its outer wall is provided with an external thread for connecting to the pressure head 32, and the lower part of its outer wall is connected to the support tube 20, and a boss 311 is provided between the support tube 20 and the external thread; the inner wall of the connecting head 31 is provided with an internal thread, and the internal thread is used to connect to the plug 33 or the negative pressure device.

[0035] The connection between the connector 31 and the support tube 20 can be achieved by bonding or welding. The end of the support tube 20 abuts against the boss 311, and the pressure head 32 does not interfere with the support tube 20 when it is screwed into the connector 31. It can be understood that the two ends of the entire filter element are symmetrical, and a plug 33 is installed at one end, and the other end is connected to the pipe of the negative pressure device, and both can be connected by threads for easy disassembly and replacement.

[0036] As a preferred solution, the split filter element further includes a fastening assembly, which includes a washer 41 and a top ring 42, the top ring 42 is provided with a plurality of through holes for screws 43 to pass through, the pressure head 32 is provided with screw holes 322 corresponding to the through holes; the side wall of the pressure head 32 located in the annular pressure groove is provided with an inclined surface 321 that increases the opening of the annular pressure groove;

[0037] During installation, the washer 41 abuts against the inclined surface 321 , and the top ring 42 is fixed to the pressing head 32 by screws 43 .

[0038] The inclined surface 321 is set so that when the support ring 12 is crimped to the annular groove, a certain accommodating space is left at the end of the annular groove, and the gasket 41 is pushed into this accommodating space through the top ring 42. Under the action of the inclined surface 321, the gasket 41 presses the support ring 12 in an annular direction, thereby tightening the connection between the filter body 10 and the support tube 20, and preventing the support ring 12 from loosening and causing wrinkles in the filter body 10; the gasket 41 here can be a rubber pad or a silicone pad, and can be set to a shape matching the inclined surface 321 to facilitate tightening, which is not repeated here.

[0039] As a preferred solution, Figure 8 As shown in (a), the feed holes 21 are evenly distributed on the support tube 20, and the feed holes 21 are elliptical holes, and the major axis direction of the ellipse is consistent with the length direction of the support tube 20.

[0040] It should be understood that the filter body 10 is relatively soft. When filtering, it is mainly the support tube 20 that is subjected to stress. Opening a feed hole 21 on the support tube 20 will reduce the stress strength of the support tube 20. Two factors need to be considered here. On the one hand, the opening area required for the feed is ensured, and on the other hand, the strength after the opening is ensured. Because the maximum feed speed of the filter body 10 is determined, the maximum feed speed of the support tube 20 needs to be greater than the filter body 10. Then, the support tube 20 needs to increase the opening area as much as possible while taking into account the stress strength after the opening. If the conventional method of opening circular holes is adopted, the positions where the two circular holes are adjacent will be weak, reducing the strength of the support tube 20. If the strength is to be improved, it is necessary to retain as much material of the support tube 20 as possible, or the thickness of the retained material of the support tube 20 determines the strength of the position. The provision of an elliptical hole can avoid the occurrence of an extremely weak position, thereby enhancing the strength of the support tube 20.

[0041] As a preferred solution, a plurality of groups of the feed holes 21 are evenly arranged along the circumference of the support tube 20 , and two adjacent groups of feed holes 21 are staggered so that the support tube 20 bodies without the feed holes 21 are cross-connected in an X shape.

[0042] like Figure 8 As shown in (b), it should be noted that the grouping here is for the convenience of describing the positions of the feed holes 21. The feed holes 21 located on the circumference of the same height are grouped as one group, which can also be understood as the feed holes 21 located at the same height layer, which is equivalent to arranging multiple layers of feed holes 21 on the support tube 20. The purpose of staggering the feed holes 21 is to enable the retained support tube 20 body material to form a cross-shaped connection, so that the support tube 20 body can be evenly stressed, there is no weak position, and the overall strength is improved.

[0043] As a preferred solution, the filter body 10 is connected to the support ring 12 by bonding or welding. The filter body 10 is made by weaving steel wire strips, and the steel wire forms an angle of 30 degrees to 60 degrees with the horizontal line.

[0044] like Fig. 9 As shown in (a), we take the commonly used 150 mesh filter as an example, the aperture is 0.1 mm, we use 0.3 mm steel wire for weaving, if we adopt the conventional crisscrossing and vertical interlacing method for weaving, after the support ring 12 is installed, the whole filter is in a soft state, like a mesh bag, and needs to be manually straightened during installation; it should also be noted that the distance between the filter body 10 and the support tube 20 is very small, when the filter body 10 is put on the support tube 20, the friction between the filter body 10 and the support tube 20 that cannot be shaped is strong, which will wear the filter body 10; Fig. 9 The steel wire shown in (b) forms an angle of 45 degrees with the horizontal line, which can also be understood as the steel wire forming an angle of 45 degrees with the length direction of the filter body 10. Through experiments, it was found that the filter body 10 formed by this weaving method can be well shaped after the support ring 12 is installed, which can reduce the wear during the socketing and protect the filter body 10.

[0045] As a preferred solution, the filter body 10 is further provided with reinforcing ribs 11 , and the reinforcing ribs 11 are aligned with the X-shaped cross-connecting portion of the support tube 20 body.

[0046] It should be noted that the filter body 10 is relatively soft. When the negative pressure is turned on, the part of the filter located at the feed hole 21 tends to be sucked into the feed hole 21 when filtering the slurry, which will cause uneven force on the filter and further cause the filter body 10 to be damaged. Fig. 9 As shown, this is the state of weaving at a 45-degree angle, with Figure 8 As shown, the reinforcing rib 11 is aligned with the main body portion retained on the support tube 20 . When the filter body 10 is subjected to force, the force can be directly transferred to the support tube 20 through the reinforcing rib 11 , thereby reducing the possibility of damage to the filter body 10 and increasing the service life of the filter element.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split filter element for battery slurry filtration, characterized in that: The invention comprises a support tube (20) and a tubular filter screen, wherein a material passing hole (21) is provided on the tube wall of the support tube (20), and connectors (31) are provided at both ends of the support tube (20); the tubular filter screen comprises a filter screen body (10) and support rings (12) provided at both ends of the filter screen body (10); The tubular filter is sleeved on the outside of the support tube (20), and the two connectors (31) are provided with pressure heads (32) connected by threads, an annular pressure groove is formed between the pressure head (32) and the support tube (20) and / or the connector (31), and the support ring (12) is crimped into the annular pressure groove.

2. The split filter element for battery slurry filtration according to claim 1, characterized in that: The connector (31) is annular, and an outer thread for connecting to the pressure head (32) is provided on the upper part of its outer wall, and a boss (311) is provided between the support tube (20) and the outer thread; an inner thread is provided on the inner wall of the connector (31), and the inner thread is used to connect to a plug (33) or a negative pressure device.

3. The split filter element for battery slurry filtration according to claim 2, characterized in that: The split filter element further comprises a fastening assembly, the fastening assembly comprising a washer (41) and a top ring (42), the top ring (42) being provided with a plurality of through holes for screws (43) to pass through, the pressure head (32) being provided with screw holes (322) corresponding to the through holes; and the side wall of the pressure head (32) located in the annular pressure groove is provided with an inclined surface (321) for increasing the opening of the annular pressure groove; During installation, the washer (41) abuts against the inclined surface (321), and the top ring (42) is fixed on the pressure head (32) by means of screws (43).

4. The split filter element for battery slurry filtration according to claim 1, characterized in that: The material passing holes (21) are evenly distributed on the support tube (20), and the material passing holes (21) are elliptical holes, and the major axis direction of the ellipse is consistent with the length direction of the support tube (20).

5. The split filter element for battery slurry filtration according to claim 4, characterized in that: A plurality of groups of the material passing holes (21) are evenly arranged along the circumference of the support tube (20), and two adjacent groups of material passing holes (21) are staggered so that the support tube (20) bodies without material passing holes (21) are cross-connected in an X shape.

6. The split filter element for battery slurry filtration according to claim 5, characterized in that: The filter body (10) is connected to the support ring (12) by bonding or welding, and the filter body (10) is made by weaving steel wire strips, and the steel wire forms an angle of 30 degrees to 60 degrees with the horizontal line.

7. The split filter element for battery slurry filtration according to claim 6, characterized in that: The filter body (10) is also provided with reinforcing ribs (11), and the reinforcing ribs (11) are aligned with the X-shaped cross-connecting portion of the support tube (20) body.