Slurry feeding system in battery diaphragm coating equipment

Abstract

The slurry feeding system in the battery diaphragm coating equipment comprises a scraper box and a material storage cavity formed in the scraper box, and scraper blades which are located on the two sides of the material storage cavity and are obliquely arranged are installed on the scraper box; one side of the anilox roller is arranged in the material storage cavity, and the edge of the scraper blade is in sliding fit with the surface of the anilox roller; the scraper box is provided with a feeding port located in the bottom of the scraper box and an overflow port located in the top of the scraper box. A plurality of grooves which are uniformly distributed in the circumferential direction of the anilox roller and are used for accommodating slurry are formed in the anilox roller; the driving mechanism is used for driving the anilox roller to rotate; the device further comprises a first adjusting mechanism and a second adjusting mechanism, the first adjusting mechanism is used for adjusting the spacing distance between the anilox roller and the scraper box, and the second adjusting mechanism is used for adjusting the axial displacement distance of the anilox roller relative to the scraper box. Foams need to be eliminated in the slurry feeding process, and the loading modulus and the coating width are adjusted in the process that the anilox roller conducts glue transferring to the follow-up procedure.

Description

Technical Field

[0001] The invention relates to the technical field of battery diaphragm coating equipment, and in particular to a slurry feeding system in a battery diaphragm coating equipment. Background Art

[0002] During the charge and discharge process of lithium-ion batteries, the diaphragm separates the positive and negative electrodes to prevent the two electrodes from contacting and short-circuiting, absorbs sufficient electrolyte, provides sufficient electrolyte lithium ion channels, and has micropore self-closing protection functions. The lithium ion conductivity of the diaphragm is directly related to the overall performance of the lithium-ion battery. The performance of the diaphragm determines the battery's interface structure, electrolyte retention, and internal resistance, which in turn affects the battery's capacity, cycle performance, charge and discharge current density, safety and other important characteristics. The diaphragm can also obtain higher heat resistance or liquid absorption through coating, further improving the safety performance of the battery.

[0003] During the diaphragm coating process, the slurry is coated onto the anilox roller to realize the loading process, and the slurry transfer coating is carried out through subsequent processes. In the loading process, it is necessary to ensure that the material is full to avoid point-like missing coating caused by subsequent coating. Summary of the invention

[0004] 1. Technical issues

[0005] The purpose of the present invention is to provide a slurry feeding system in a battery diaphragm coating device to solve the problem of eliminating foam during the slurry feeding process and adjusting the load modulus and coating width during the glue transfer process to the subsequent process according to the anilox roller.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A slurry feeding system in a battery diaphragm coating device comprises a scraper box and a storage cavity arranged on the scraper box, wherein the scraper box is provided with scraper blades located on both sides of the storage cavity and arranged obliquely; further comprising a rotatable anilox roller, one side of which is arranged in the storage cavity, and the edge of the scraper blade is slidably matched with the surface of the anilox roller; the scraper box is provided with a feed port located at its bottom and an overflow port located at its top; the anilox roller is provided with a plurality of grooves evenly distributed along its circumference and used to accommodate slurry; further comprising a driving mechanism for driving the anilox roller to rotate; further comprising a first adjusting mechanism and a second adjusting mechanism, wherein the first adjusting mechanism is used to adjust the spacing distance between the anilox roller and the scraper box, and the second adjusting mechanism is used to adjust the displacement distance of the anilox roller relative to the axis of the scraper box.

[0009] Preferably, sealing gaskets located at both ends of the material storage cavity are installed on the scraper box.

[0010] Preferably, it further comprises a material trough disposed below the scraper box, wherein the material trough is used to receive the slurry overflowing from the scraper box.

[0011] Preferably, the driving mechanism includes slide rail seats installed at intervals at both ends of the scraper box, bearing seats are fixedly installed on the two slide rail seats, and the anilox roller is rotatably installed on the two bearing seats; one end of the anilox roller is connected to a planetary reducer and a driving motor connected to the planetary reducer.

[0012] Preferably, the first adjustment mechanism includes a first guide rail installed at intervals on the slide rail seat, a sliding seat is slidably installed on the first guide rail; a reciprocating seat and a cross brace installed on the reciprocating seat are installed on the sliding seat, a plurality of first connecting blocks are fixed at intervals on the cross brace, and a second connecting block corresponding to the first connecting block is installed on the scraper box; a spacing adjustment component is provided between the sliding seat and the bearing seat located on the same side.

[0013] Preferably, the spacing adjustment assembly includes a second guide rail installed at intervals on the sliding seat and arranged longitudinally, a wedge block is slidably installed on the second guide rail, a rotating seat and a rotating rod rotatably installed on the rotating seat are installed on the sliding seat, and the rotating rod is threadedly engaged with the wedge block; a rolling wheel is installed on the bearing seat and rolls with the inclined surface of the wedge block.

[0014] Preferably, an adjusting hand wheel is installed on the rotating rod.

[0015] Preferably, the second adjustment mechanism includes a third guide rail installed at intervals on the sliding seat, the reciprocating seat is slidably installed on the third guide rail, the reciprocating seat is installed with a self-aligning bearing, and the cross brace is rotatably installed on the self-aligning bearing; the sliding seat is installed with an adjustment motor and an eccentric shaft connected to the adjustment motor, the eccentric shaft is rotatably installed with a joint bearing, and the joint bearing is rotatably connected to the reciprocating seat.

[0016] Preferably, an adjustment limit block is installed on the cross brace, and an adjustment rod is installed on the reciprocating seat at intervals, one end of the adjustment rod extends into the reciprocating seat to cooperate with the adjustment limit block, and the other end of the adjustment rod is provided with a rotating hand wheel.

[0017] Preferably, a protective cover is installed on the reciprocating seat.

[0018] (III) Beneficial effects

[0019] The anilox roller, the storage chamber and the scraper blade enclose an internal sealed space. After the slurry is pumped from the outside into the storage chamber from the feed port, it overflows from the overflow port to avoid the presence of air in the storage chamber. After the anilox roller is rotated by the driving mechanism, the grooves on the anilox roller are filled with slurry and are scraped flat after rotating to the position of the scraper blade.

[0020] Therefore, the dipping method is used to ensure that the groove can be filled with slurry and eliminate the bubbles that may exist in the slurry filled in the groove;

[0021] Specifically, during the slurry feeding process, the first adjusting mechanism is used to adjust the distance between the anilox roller and the scraper box to adjust the film loading amount, while the second adjusting mechanism adjusts the relative displacement of the axis, so as to adjust the slurry feeding width on the anilox roller, which is suitable for real-time adjustment to match the diaphragm coating width, and can also meet the dynamic feeding process to make adjustments to ensure that the grooves of the anilox roller are full. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a first-view stereoscopic structure of an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a second viewing angle stereoscopic structure of an embodiment of the present invention;

[0024] Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the scraper box from a first viewing angle in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the scraper box structure from a second viewing angle in an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of a first viewing angle structure in which a first adjustment mechanism and a second adjustment mechanism are assembled in an embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of a second viewing angle structure in which the first adjustment mechanism and the second adjustment mechanism are assembled in an embodiment of the present invention;

[0029] exist Figures 1 to 7 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0030] Scraper box 1, storage chamber 2, scraper blade 3, anilox roller 4, feed port 5, overflow port 6, drive mechanism 7, first adjustment mechanism 8, second adjustment mechanism 9, sealing gasket 10, material trough 11, slide rail seat 12, bearing seat 13, planetary reducer 14, drive motor 15, first guide rail 16, sliding seat 17, reciprocating seat 18, cross brace 19, first connecting block 20, second connecting block 21, second guide rail 22, wedge block 23, rotating seat 24, rotating rod 25, rolling wheel 26, adjusting hand wheel 27, third guide rail 28, self-aligning bearing 29, adjusting motor 30, eccentric shaft 31, joint bearing 32, adjusting limit block 33, adjusting rod 34, rotating hand wheel 35, protective cover 36. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] See also Figure 1-Figure 7 As shown, in an embodiment of the present invention, a slurry feeding system in a battery diaphragm coating device is proposed, which is used to transfer the externally pumped slurry in the entire battery diaphragm coating device, especially in the process of coating by dispensing. During the slurry feeding process, it is necessary to eliminate bubbles, fill the slurry with glue and be able to adapt to the displacement changes generated during the movement of the diaphragm to perform adaptive adjustments from the feeding end.

[0033] Specifically, the scraper box 1 includes a scraper box 1 and a storage chamber 2 arranged on the scraper box 1, wherein scraper blades 3 are installed on both sides of the storage chamber 2 and are inclined, and also include a rotatable anilox roller 4, one side of the anilox roller 4 is arranged in the storage chamber 2, and the edge of the scraper blade 3 is slidably matched with the surface of the anilox roller 4, and a sealed space is formed by enclosing the storage chamber 2, the anilox roller 4, and the scraper blade 3, and a feed port 5 located at the bottom and an overflow port 6 located at the top are provided on the scraper box 1, and the slurry pumped from the outside is continuously input into the storage chamber 2 from the feed port 5. Since the internal space is closed, the slurry continuously flows outward from the overflow port 6, so that the slurry in the storage chamber 2 is always kept in a full state, thereby ensuring that there are no bubbles in the internal slurry.

[0034] At the same time, a plurality of grooves are provided on the anilox roller 4 which are evenly distributed along its circumference and are used to accommodate the slurry. The grooves are arranged in an array form and are specifically designed according to the diaphragm coating points. There may be a variety of different regular arrangements. The grooves follow the anilox roller 4 into the storage chamber 2 and are immersed in the slurry, thereby ensuring that the grooves are filled with slurry from entering the storage chamber 2 to leaving the storage chamber 2, and the slurry in the grooves is scraped flat by the scraper blade 3 when leaving the storage chamber 2.

[0035] Specifically, it also includes a driving mechanism 7 for driving the anilox roller 4 to rotate. The driving mechanism 7 drives the anilox roller 4 to rotate, continuously realizes the feeding process, and cooperates with the plate roller in the subsequent process to realize the slurry discharge in the groove, forming a continuous feeding and unloading action.

[0036] In order to adjust the position of the groove filling in the loading position and the film loading amount in response to the deviation of the moving position of the diaphragm in the subsequent process, the first adjusting mechanism 8 and the second adjusting mechanism 9 are specifically included. The first adjusting mechanism 8 is used to adjust the spacing distance between the anilox roller 4 and the scraper box 1. The spacing distance adjustment is to adjust the thickness of the slurry after loading; and the second adjusting mechanism 9 is used to adjust the axial displacement distance of the anilox roller 4 relative to the scraper box 1. By moving the scraper box 1 along the axial direction, the width of the slurry at the loading position of the anilox roller 4 can be adjusted, thereby adapting to the dynamic changes of the final gluing position of the diaphragm.

[0037] In order to reliably seal the storage chamber 2 and prevent the slurry from leaking from both sides, sealing gaskets 10 are installed on the scraper box 1 at both ends of the storage chamber 2. Two sealing gaskets 10 are arranged at intervals, and the ends of the anilox roller 4 are fitted to maintain sealing during rotation. The slurry will not leak from both ends, forming an effective barrier to the internal slurry.

[0038] Since the slurry entering the scraper box 1 continuously overflows, the slurry needs to be collected and recovered. Therefore, a material trough 11 is also included below the scraper box 1. The material trough 11 is used to receive the slurry overflowing from the scraper box 1. The material trough 11 can be fixed in the coating equipment and located below the scraper box 1 to achieve reliable recovery of the overflow slurry.

[0039] Specifically, the anilox roller 4 is rotationally driven by the driving mechanism 7, and the driving mechanism 7 includes a slide rail seat 12 installed at intervals at both ends of the scraper box 1, and the two slide rail seats 12 are fixedly installed with bearing seats 13. The anilox roller 4 is rotatably installed on the two bearing seats 13. The two slide rail seats 12 are installed in the coating equipment for support, and the anilox roller 4 is rotationally supported by the bearing seats 13. At the same time, a planetary reducer 14 and a driving motor 15 connected to the planetary reducer 14 are connected to one end of the anilox roller 4; the driving motor 15 and the planetary reducer 14 transmit the rotational power to the anilox roller 4 to realize the rotational drive, thereby rotating the groove on the anilox roller 4 into the storage chamber 2 to be filled with slurry, and rotating to the outside of the storage chamber 2 to cooperate with the subsequent plate roller to realize the slurry transfer to the diaphragm for coating, forming a continuous feeding process.

[0040] Specifically, the first adjusting mechanism 8 includes a first guide rail 16 installed at intervals on the slide rail seat 12, a sliding seat 17 is slidably installed on the first guide rail 16, and the sliding seat 17 can slide relative to the slide rail seat 12 through the action of the first guide rail 16, and a reciprocating seat 18 and a cross brace 19 installed on the reciprocating seat 18 are installed on the sliding seat 17, and a plurality of first connecting blocks 20 are fixed on the cross brace 19 at intervals, and a second connecting block 21 corresponding to the first connecting block 20 is installed on the scraper box 1, and the first connecting block 20 and the second connecting block 21 are connected to the scraper box 1. The two connecting blocks 21 are fastened to realize the installation and support of the cross brace 19 for the entire scraper box 1, and can slide along with the sliding seat 17, so that the spacing distance of the scraper box 1 relative to the anilox roller 4 can be adjusted. Specifically, a spacing adjustment component is provided between the sliding seat 17 and the bearing seat 13 located on the same side, that is, spacing adjustment components are provided on both sides, so as to be able to synchronously or asynchronously adjust the movement of the scraper box 1, that is, it can at least adapt to the coating process requiring different thicknesses, and adapt from the feeding end after adjustment to ensure the continuity of the subsequent coating process.

[0041] Among them, the spacing adjustment component is used to achieve fine adjustment of the spacing distance. Specifically, the spacing adjustment component includes a second guide rail 22 installed on the sliding seat 17 and arranged longitudinally. A wedge block 23 is slidably installed on the second guide rail 22. Under the action of the second guide rail 22, the wedge block 23 can slide longitudinally. At the same time, a rotating seat 24 and a rotating rod 25 rotatably installed on the rotating seat 24 are installed on the sliding seat 17. The rotating rod 25 is threadedly engaged with the wedge block 23. After the rotating rod 25 rotates relative to the rotating seat 24, the wedge block 23 can slide up and down relative to the sliding seat 17 under the thread engagement and the sliding limit action of the second guide rail 22 on the wedge block 23. At the same time, a rolling wheel 26 that rolls with the inclined surface of the wedge block 23 is installed on the bearing seat 13. Since the relative position of the rolling wheel 26 is fixed, when the inclined surface of the wedge block 23 moves up and down along the rolling wheel 26, the inclined surface is used to achieve stepless adjustment of the spacing between the scraper box 1 and the anilox roller 4.

[0042] In order to facilitate driving the rotating rod 25 , an adjusting hand wheel 27 is mounted on the rotating rod 25 .

[0043] The first adjusting mechanism 8 is used to adjust the spacing to meet the film thickness adjustment. The coating width or coating position is adjusted on the anilox roller 4. The second adjusting mechanism 9 is used to adjust the movement of the scraper box 1 in the axial direction of the anilox roller 4.

[0044] Specifically, the second adjustment mechanism 9 includes a third guide rail 28 installed at intervals on the sliding seat 17, the reciprocating seat 18 is slidably installed on the third guide rail 28, a self-aligning bearing 29 is installed on the reciprocating seat 18, and the cross brace 19 is rotatably installed on the self-aligning bearing 29, and the cross brace 19 can be adjusted and moved along the axial direction of the reciprocating seat 18 relative to the sliding seat 17. Specifically, an adjusting motor 30 and an eccentric rotating shaft 31 connected to the adjusting motor 30 are installed on the sliding seat 17, and a joint bearing 32 is rotatably installed on the eccentric rotating shaft 31, and the joint bearing 32 is rotatably connected to the reciprocating seat 18; the adjusting motor 30 drives the joint bearing 32 to reciprocate a relative distance through the eccentric rotating shaft 31, and synchronously pulls the reciprocating seat 18 to realize relative displacement sliding through the third guide rail 28, so as to realize displacement adjustment of the scraper box 1 in the axial direction of the anilox roller 4, wherein the adjusting motor 30 is a stepping motor, etc., which can realize fine adjustment and braking.

[0045] At the same time, an adjustment limit block 33 is installed on the cross brace 19, and adjustment rods 34 are installed at intervals on the reciprocating seat 18. One end of the adjustment rod 34 extends into the reciprocating seat 18 and cooperates with the adjustment limit block 33. The other end of the adjustment rod 34 is provided with a rotating hand wheel 35. By rotating the hand wheel 35, the extension length of the two adjustment rods 34 is adjusted, and the adjustment limit block 33 can follow the rotation angle formed by the cross brace 19 relative to the reciprocating seat 18 to perform limit adjustment. Therefore, the relative angle of the scraper box 1 can be adjusted and limited within a range to ensure that the slurry in the storage chamber 2 can be stably and continuously loaded onto the anilox roller 4.

[0046] In particular, a protective cover 36 is installed on the reciprocating seat 18 to cover the internal structure of the reciprocating seat 18 to prevent the internal action parts from being stuck due to external debris falling into them.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A slurry feeding system in a battery separator coating device, characterized in that: It comprises a scraper box and a material storage cavity arranged on the scraper box, wherein the scraper box is provided with scraper blades which are located on both sides of the material storage cavity and are arranged obliquely; It also includes a rotatable anilox roller, one side of which is disposed in the material storage cavity, and the edge of the scraper blade is slidably matched with the surface of the anilox roller; The scraper box is provided with a feed port at the bottom and an overflow port at the top; The anilox roller is provided with a plurality of grooves evenly distributed along its circumference and used for accommodating slurry; Also includes a driving mechanism for driving the anilox roller to rotate; It also includes a first adjustment mechanism and a second adjustment mechanism, wherein the first adjustment mechanism is used to adjust the spacing distance between the anilox roller and the scraper box, and the second adjustment mechanism is used to adjust the axial displacement distance of the anilox roller relative to the scraper box.

2. The slurry feeding system in a battery separator coating device according to claim 1, characterized in that: The scraper box is provided with sealing pads located at both ends of the material storage cavity.

3. The slurry feeding system in a battery separator coating device according to claim 1, characterized in that: It also includes a material trough arranged below the scraper box, and the material trough is used to receive the slurry overflowing from the scraper box.

4. A slurry feeding system in a battery separator coating device according to any one of claims 1 to 3, characterized in that: The driving mechanism comprises slide rail seats installed at intervals at two ends of the scraper box, bearing seats are fixedly installed on the two slide rail seats, and the anilox roller is rotatably installed on the two bearing seats; One end of the anilox roller is connected to a planetary reducer and a driving motor connected to the planetary reducer.

5. The slurry feeding system in the battery separator coating equipment according to claim 4, characterized in that: The first adjustment mechanism comprises a first guide rail installed at intervals on the slide rail seat, and a slide seat is slidably installed on the first guide rail; The sliding seat is provided with a reciprocating seat and a cross brace provided on the reciprocating seat, a plurality of first connecting blocks are fixed at intervals on the cross brace, and a second connecting block corresponding to the first connecting block is provided on the scraper box; A spacing adjustment component is provided between the sliding seat and the bearing seat located on the same side.

6. The slurry feeding system in the battery separator coating equipment according to claim 5, characterized in that: The spacing adjustment assembly comprises a second guide rail installed on the sliding seat at intervals and arranged longitudinally, a wedge block is slidably installed on the second guide rail, a rotating seat and a rotating rod rotatably installed on the rotating seat are installed on the sliding seat, and the rotating rod is threadedly matched with the wedge block; The bearing seat is provided with a rolling wheel which is in rolling cooperation with the inclined surface of the wedge block.

7. The slurry feeding system in the battery separator coating equipment according to claim 6, characterized in that: An adjusting hand wheel is installed on the rotating rod.

8. The slurry feeding system in a battery separator coating device according to claim 5, characterized in that: The second adjustment mechanism comprises a third guide rail installed at intervals on the sliding seat, the reciprocating seat is slidably installed on the third guide rail, a self-aligning bearing is installed on the reciprocating seat, and the cross brace is rotatably installed on the self-aligning bearing; An adjusting motor and an eccentric rotating shaft connected to the adjusting motor are installed on the sliding seat. A spherical bearing is rotatably installed on the eccentric rotating shaft, and the spherical bearing is rotatably connected to the reciprocating seat.

9. The slurry feeding system in the battery separator coating equipment according to claim 8, characterized in that: An adjustment limit block is installed on the cross brace, and an adjustment rod is installed on the reciprocating seat at intervals. One end of the adjustment rod extends into the reciprocating seat and cooperates with the adjustment limit block, and the other end of the adjustment rod is provided with a rotating hand wheel.

10. The slurry feeding system in the battery separator coating equipment according to claim 9, characterized in that: A protective cover is installed on the reciprocating seat.

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