Battery diaphragm slitting structure

Abstract

The utility model discloses a battery diaphragm slitting structure, and relates to the technical field of lithium battery diaphragm slitting, the battery diaphragm slitting structure comprises a slitting blade and a bottom bearing plate, the bottom bearing plate is provided with a cutting groove, the edge of the slitting blade is provided with a cutting edge surface, and the cutting edge surface extends into the cutting groove; a mounting groove is formed in the middle of the slitting blade; pressure ring grooves are formed in the two sides of the slitting blade, side face scrapers are installed in the pressure ring grooves, and the tops of the side face scrapers are installed in the pressure ring grooves through installation rolling bodies. One side of the side scraper is provided with an inclined plane facing the slitting blade, and the other side of the side scraper is provided with a first magnetic batten; magnetic battens II are mounted on the bearing plate at the bottoms of the two sides of the cutting groove; and the magnetic lath I and the magnetic lath II have the same magnetism, so that the technical problem that the battery diaphragm is damaged due to the fact that the scraper is easy to collide with the battery diaphragm under the condition of gravity in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery diaphragm slitting technical field, concretely is battery diaphragm slitting structure. BACKGROUND

[0002] Lithium battery diaphragm is the inner layer component of lithium battery, and in the structure of lithium battery, the diaphragm is one of the key inner layer components. The performance of the diaphragm determines the interface structure, internal resistance etc. of the battery, directly influences the capacity, cycle and safety performance etc. of the battery, and the diaphragm with excellent performance has important role to improve the comprehensive performance of the battery. The main role of the diaphragm is to separate the positive and negative poles of the battery, prevent the short circuit of the two poles, and also has the function of allowing the electrolyte ions to pass. The battery diaphragm is mainly made of polyolefin and other high molecular materials, and these materials are usually non-magnetic, that is, their magnetic permeability is close to 1, and they do not have the ability to guide or shield the magnetic induction lines.

[0003] Reference 202223187700.5 a kind of lithium electronic battery diaphragm slitting blade, to solve the problem that the friction of blade can generate heat in the process of slitting thin film, heat can make a part of film body of cutting surface softening and adhering on the surface of blade, and the thickness of colloid will increase with slitting time, and the cleaning in time will affect the slitting precision. The prior art is expected to achieve side cleaning by setting a cutting surface scraper.

[0004] The reference believes that: in the circumferential groove on the surface of the disc blade, under the influence of gravity, the cutting surface scraper is still at the bottom of the disc blade when it rotates at high speed. However, it has the following problems:

[0005] 1) First of all, the cutting surface scraper is connected in the circumferential groove by lubricating the connecting shaft, that is, it can slide. Under high speed, the cutting surface scraper is difficult to keep stable at the bottom of the disc cutter due to the collision of the film body.

[0006] 2) Secondly, the cutting surface scraper deflected by high-speed rotation will roll down the circumferential groove again due to gravity after cutting the adhered film body, and will return to the bottom of the slitting blade. When the slitting blade is inserted into the combined cutter slot, the bottom of the cutting surface scraper will collide with the diaphragm, causing damage to the diaphragm.

[0007] Therefore, we provide a food bending blade to solve the above problems. INVENTION CONTENTS

[0008] The purpose of the utility model is to make up for the shortcomings of the prior art, and provide a battery diaphragm slitting structure to solve the technical problem that the scraper in the prior art is easy to collide with the battery diaphragm under the action of gravity, causing damage to the battery diaphragm.

[0009] The utility model discloses a battery diaphragm slitting structure, including slitting blade and bottom bearing plate, is seted up with cutting groove on bottom bearing plate, and the edge of slitting blade is provided with blade face, and the blade face extends to cutting groove,

[0010] The middle part of the slitting blade is provided with a mounting groove; a pressure ring groove is formed on both sides of the slitting blade, and a side scraper is mounted in the pressure ring groove; the top of the side scraper is mounted in the pressure ring groove through a mounting rolling body; one side of the side scraper is provided with an inclined surface facing the slitting blade, and the other side is provided with a magnetic plate strip one;

[0011] A magnetic plate strip two is mounted on the bottom bearing plate on both sides of the cutting groove; the magnetic plate strip one and the magnetic plate strip two have the same magnetism.

[0012] In a further technical solution, a position hole is formed on the side scraper, a rolling body is mounted in the position hole, the rolling body includes a guide column and a rolling ball, the rolling ball is fixedly connected with the guide column, the rolling ball rolls in the pressure ring groove, and the guide column is connected with the side scraper.

[0013] In a further technical solution, an end head is arranged on the guide column, a connecting bearing is mounted in the position hole of the end head, the inner ring of the connecting bearing is fixedly connected with the guide column, and the outer ring of the connecting bearing is fixedly connected with the side scraper.

[0014] In a further technical solution, the side end of the pressure ring groove facing the side scraper is closed, and the gap distance of the pressure ring groove is not greater than the diameter of the rolling ball.

[0015] In a further technical solution, mounting holes and air columns are formed in the bottom bearing plate, and exhaust holes are formed on both sides of the air columns.

[0016] In a further technical solution, a positioning frame is arranged on the bottom bearing plate, positioning holes are formed in the positioning frame, a magnetic plate strip two is mounted in the positioning frame, the magnetic plate strip two includes a plurality of magnetic blocks, threaded holes are formed in the magnetic blocks, plastic bolts are mounted in the threaded holes, and the magnetic blocks are fixed in the positioning frame.

[0017] In a further technical solution, the groove diameter of the cutting groove is not less than the sum of the thicknesses of the blade face and the two side scrapers.

[0018] In a further technical solution, the cutting groove is one of a vertical cross-section square groove, a trapezoidal groove or a stepped groove; when the cutting groove is a stepped groove, the cutting groove at least includes a bottom surface in the middle part and transition surfaces on both sides of the bottom surface.

[0019] Compared with the prior art, the utility model has the advantages of:

[0020] The utility model discloses a same magnetic plate strip one and magnetic plate strip two are set up, according to the magnetic same repulsion principle, make the side scraper even in gravity case also will not keep natural vertical condition, to overcome the side scraper when removing the battery separator that is adhered on the slitting blade, will not be driven by the slitting blade of high -speed rotation because of greater friction, and the greater potential energy is obtained, and then along with the gravity acceleration downward and lead to the collision battery separator located on both sides of the slitting blade, the magnetic repulsion guarantees the position and scraping effect of the side scraper on the slitting blade, thereby can realize scraping and avoid interference and collide separator. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic view of battery separator slitting structure of the embodiment 1 of the utility model;

[0022] Figure 2 It is the front view schematic view of battery separator slitting structure of the embodiment 1 of the utility model;

[0023] Figure 3 It is the side view cross section schematic view of side scraper in pressure ring groove of the utility model;

[0024] Figure 4 It is the A part enlarged view of Figure 3 ;

[0025] Figure 5 It is the structure schematic view of battery separator slitting structure of the embodiment 2 of the utility model;

[0026] Figure 6 It is the B part enlarged view of Figure 5 ;

[0027] Figure 7 It is the front view of bottom bearing plate of the utility model;

[0028] Figure 8 It is the plan view of positioning frame of the utility model;

[0029] Figure 9 It is the side view schematic view of slitting blade and bottom bearing plate;

[0030] Figure 10 It is the side view schematic view of bottom bearing plate Figure 1 ;

[0031] Figure 11 It is the side view schematic view of bottom bearing plate Figure 2 ;

[0032] Figure 12 It is the side view schematic view of bottom bearing plate Figure 3 ;

[0033] In the drawing:

[0034] 1. Slitting blade; 2. Bottom support plate; 3. Cutting groove; 4. Cutting edge face; 5. Mounting groove; 6. Pressure ring groove; 21. Mounting hole; 22. Air column; 23. Exhaust hole; 31. Countersunk surface; 32. Transition surface;

[0035] 7. Side scraper; 71. Inclined surface; 72. Magnetic strip one; 73. Position hole; 74. Guide post; 75. Rolling ball; 76. Connecting bearing;

[0036] 8. Magnetic strip 2; 9. Positioning frame; 91. Positioning hole; 92. Magnetic block; 93. Threaded hole. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Example 1

[0039] like Figures 1-4 As shown, this is one embodiment of the present invention. The battery separator cutting structure includes a cutting blade 1 and a bottom support plate 2. A cutting groove 3 is provided on the bottom support plate 2. The edge of the cutting blade 1 is provided with a cutting edge 4, which extends into the cutting groove 3.

[0040] The slitting blade 1 has a mounting groove 5 in the middle; pressure ring grooves 6 are provided on both sides of the slitting blade 1, and a side scraper 7 is installed in the pressure ring groove 6. The top of the side scraper 7 is installed in the pressure ring groove 6 by mounting a rolling element; one side of the side scraper 7 is provided with an inclined surface 71 facing the slitting blade 1, and the other side is provided with a magnetic strip 72.

[0041] Magnetic strips 8 are installed on the bottom support plates 2 on both sides of the cutting groove 3; magnetic strips 72 and 8 have the same magnetism. This invention, by setting up magnetic strips 72 and 8 of the same polarity, utilizes the principle of magnetic repulsion to prevent the side scraper from maintaining a naturally vertical position even under gravity. This overcomes the problem that when the side scraper removes the battery separator adhered to the slitting blade, it will not gain significant potential energy due to high friction caused by the high-speed rotating slitting blade, and then accelerate downwards under gravity, causing it to collide with the battery separator located on both sides of the slitting blade. The magnetic repulsion ensures the position of the side scraper on the slitting blade and the scraping effect, thus achieving both scraping and avoiding interference with the separator.

[0042] like Figure 3 and4 As shown, the side scraper 7 is provided with a position hole 73, a rolling body is installed in the position hole 73, the rolling body comprises a guide column 74 and a rolling ball 75, the rolling ball 75 is fixedly connected with the guide column 74, the rolling ball 75 rolls in the pressure ring groove 6, and the guide column 74 is connected with the side scraper 7. The guide column 74 is provided with an end head part, the end head part ensures fixed installation of a connecting bearing, a connecting bearing 76 is installed in the position hole 73 of the end head part, the inner ring of the connecting bearing 76 is fixedly connected with the guide column 74, and the outer ring of the connecting bearing 76 is fixedly connected with the side scraper 7. In terms of installation, the top of the side scraper is provided in a two-lobed mode, the connecting bearing and the guide column are installed, and then the two-lobed mode is closed and welded, the rolling ball is installed at the end of the guide column, the rolling ball is limited by the guide column and can only rotate along the axis of the guide column, and because the pressure ring groove is provided in a closed mode, the rolling ball is limited.

[0043] The pressure ring groove 6 is provided in a closed mode towards the side end of the side scraper 7, and the gap distance of the pressure ring groove 6 is not greater than the diameter of the rolling ball 75.

[0044] Embodiment 2

[0045] As Figures 5-10 For another embodiment of the utility model, on the basis of embodiment 1, in order to realize the adjustment of the magnetic plate strip two 8, to facilitate the adjustment of the lowest point position of the side scraper, a positioning frame 9 is arranged on the bottom bearing plate 2, the positioning frame 9 is provided with a positioning hole 91, the magnetic plate strip two 8 is installed in the positioning frame 9, the magnetic plate strip two 8 comprises a plurality of magnetic blocks 92, the magnetic block 92 is provided with a threaded hole 93, the plastic bolt 10 is installed in the threaded hole 93 and the magnetic block 92 is fixed in the positioning frame 9.

[0046] The bottom bearing plate 2 is provided with an installation hole 21 and an air column 22, and the air column 22 is provided with an exhaust hole 23 on both sides.

[0047] The slot diameter of the cutting groove 3 is not less than the sum of the thicknesses of the blade face 4 and the two groups of side scrapers 7.

[0048] The cutting groove 3 is one of a vertical section square groove, a trapezoidal groove or a stepped groove, and is a square groove in this embodiment.

[0049] Embodiment 3

[0050] As Figure 11 For another embodiment of the utility model, on the basis of embodiment 2, the cutting groove 3 is a vertical section trapezoidal groove, which is a bottom-contracted trapezoidal section and can quickly clean the diaphragm scrap, when the slitting equipment is stopped, gas is injected into the air path pipeline at the bottom of the air column, and airflow is washed from both sides through the exhaust hole, so that the diaphragm scrap is flushed out of the bottom bearing plate.

[0051] Example 4

[0052] As Figure 12 shown, it is another embodiment of the utility model, on the basis of example 2, when cutting groove 3 is ladder groove, cutting groove 3 includes at least the bottom surface 31 of middle part and the transition surface 32 located on both sides of bottom surface 31. The reserved space is convenient for the entry of slitting blade and side scraper.

[0053] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

Claims

1. A battery separator slitting structure, characterized by, It includes a slitting blade (1) and a bottom bearing plate (2), a cutting groove (3) is opened on the bottom bearing plate (2), and the edge of the slitting blade (1) is provided with a blade face (4) extending into the cutting groove (3); A mounting groove (5) is arranged in the middle of the slitting blade (1); a pressure ring groove (6) is opened on both sides of the slitting blade (1), and a side scraper (7) is mounted in the pressure ring groove (6); the top of the side scraper (7) is mounted in the pressure ring groove (6) through a mounting rolling body; one side of the side scraper (7) is provided with an inclined surface (71) facing the slitting blade (1), and the other side is provided with a magnetic plate strip one (72); A magnetic plate strip two (8) is mounted on the bottom bearing plate (2) on both sides of the cutting groove (3); the magnetic plate strip one (72) and the magnetic plate strip two (8) have the same magnetism.

2. The battery separator slitting structure of claim 1, wherein, A position hole (73) is opened on the side scraper (7), a rolling body is mounted in the position hole (73), the rolling body includes a guide column (74) and a rolling ball (75), the rolling ball (75) is fixedly connected with the guide column (74), the rolling ball (75) rolls in the pressure ring groove (6), and the guide column (74) is connected with the side scraper (7).

3. The battery separator slitting structure of claim 2, wherein, An end head is arranged on the guide column (74), a connecting bearing (76) is mounted in the position hole (73) of the end head, the inner ring of the connecting bearing (76) is fixedly connected with the guide column (74), and the outer ring of the connecting bearing (76) is fixedly connected with the side scraper (7).

4. The battery separator slitting structure of claim 1, wherein, The side end of the pressure ring groove (6) towards the side scraper (7) is closed, and the gap distance of the pressure ring groove (6) is not greater than the diameter of the rolling ball (75).

5. The battery separator slitting structure of claim 1, wherein, An installation hole (21) and an air column (22) are opened in the bottom bearing plate (2), and air exhaust holes (23) are opened on both sides of the air column (22).

6. The battery separator slitting structure of claim 1, wherein, A positioning frame (9) is arranged on the bottom bearing plate (2), a positioning hole (91) is opened in the positioning frame (9), and the magnetic plate strip two (8) is mounted in the positioning frame (9); the magnetic plate strip two (8) includes a plurality of magnetic blocks (92), a threaded hole (93) is opened in the magnetic block (92), a plastic bolt (10) is mounted in the threaded hole (93) and fixes the magnetic block (92) in the positioning frame (9).

7. The battery separator slitting structure of claim 1, wherein, The groove diameter of the cutting groove (3) is not less than the sum of the thicknesses of the blade face (4) and the two groups of side scrapers (7).

8. The battery separator slitting structure of claim 1, wherein, The cutting groove (3) is one of a vertical section square groove, a trapezoidal groove or a stepped groove; when the cutting groove (3) is a stepped groove, the cutting groove (3) at least includes a middle sunken bottom surface (31) and a transition surface (32) located on both sides of the sunken bottom surface (31).

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