Water-based PVDF (Polyvinylidene Fluoride) dispensing device for coating lithium battery diaphragm

Abstract

The utility model relates to a lithium battery diaphragm water-based PVDF dispensing device which comprises a device bottom plate, one ends of supporting rods are fixed to the four corners of the top of the device bottom plate, a device top plate is fixed to the other ends of the supporting rods, a first electric telescopic cylinder is installed on the top of the device top plate, and the bottom of the first electric telescopic cylinder penetrates through the device top plate to fix a dispensing assembly. Through the combination of the first electric telescopic cylinder, the dispensing assembly and the fixing barrel, the first electric telescopic cylinder can be used for driving the multiple smear-proof shells and the positioning pipe to move downwards, after the positioning pipe moves downwards to make contact with the surface of the diaphragm, the dispensing head enters the positioning pipe, makes contact with the diaphragm and conducts dispensing on the surface of the diaphragm, and after dispensing is completed, the dispensing head can be used for dispensing the surface of the diaphragm. And then the dispensing head and the smear-proof shell are directly moved upwards, and the dispensing head and the dispensed coating are limited through the smear-proof shell and the positioning pipe, so that the smear phenomenon is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to diaphragm coating field, concretely is a lithium battery diaphragm waterborne PVDF point coating device. BACKGROUND

[0002] In the structure of lithium battery, diaphragm is one of the key inner layer components; the main role of diaphragm is to separate the positive and negative poles of the battery, prevent the short circuit of two poles, in addition, also have the function that electrolyte ion can pass through; diaphragm material is not conductive, and its physical and chemical properties have great influence on the performance of battery; the existing lithium battery diaphragm waterborne PVDF point coating mechanism, in the process of using, point trail is serious, and the shape is irregular.

[0003] According to the public patent 202220927009.7 a kind of lithium battery diaphragm waterborne PVDF point coating device can know, including bottom plate, the top of the bottom plate is welded and installed with first fixed rod and second fixed rod, first fixed rod and the top of second fixed rod are welded and installed with top plate, the side wall of first fixed rod is provided with adjusting mechanism, second fixed rod corresponding side wall is rotatably installed with point coating roller, the outer side wall of one group of second fixed rod is welded and installed with motor.The lithium battery diaphragm waterborne PVDF point coating device, by setting up the point coating head of uniform distribution on point coating roller, simultaneously cooperate with the use of point coating plate, make the contact point of coating and point coating roller keep on point coating head, effectively avoid the device in point coating process, appear point trail seriously, point shape irregularity, simultaneously also avoid the emergence of point fracture and hollow to a certain extent, guarantee the point coating quality, guarantee the normal operation of next operation.

[0004] But in the traditional lithium battery diaphragm waterborne PVDF point coating device, usually use point coating roller to drive the point coating element on its surface and diaphragm contact, to execute point coating operation, when point coating roller rotates and drives these point coating elements to carry out point coating on diaphragm surface, point coating element will slide on diaphragm surface, this sliding phenomenon can cause the point pattern formed by point coating to produce serious trailing effect, influence the precision and quality of coating.Therefore, new technical scheme needs to be designed to solve. UTILITY MODEL CONTENTS

[0005] The utility model discloses a lithium battery diaphragm coating water-based PVDF point coating device to overcome the prior art's insufficient, adapt to the reality needs, to solve the current traditional lithium battery diaphragm coating water-based PVDF point coating device, usually use point coating roller to drive its surface point coating element and diaphragm contact to execute point coating operation, when point coating roller rotates and drives these point coating element to carry out point coating on diaphragm surface, point coating element will slide on diaphragm surface, and this sliding phenomenon can cause the point pattern formed by point coating to have serious trailing effect, which influences the precision and quality of coating.

[0006] In order to realize the utility model discloses the technical scheme that the utility model discloses adopts: design a lithium battery diaphragm coating water-based PVDF point coating device, including device bottom plate, the device bottom plate top four corners all are fixed with the one end of support rod, the other end of support rod is fixed with device top plate, the device top plate top is installed with first electric telescopic cylinder, and the first electric telescopic cylinder bottom passes through device top plate and is fixed with point coating subassembly.

[0007] Preferably, the point coating assembly comprises a material box, a fixed strip plate, a circular hole, a material pump, a material pipe, an anti-trail shell, a positioning pipe, a point coating head and a moving plate.

[0008] Preferably, the material box is fixed with an electric telescopic cylinder at the top, one end of a pipe body is communicated with the upper and lower ends of the side surface of the material box, the other end of the pipe body is detachably connected with a pipe cover, the bottom of the material box is installed with a fixed strip plate, a plurality of circular holes are formed in the fixed strip plate, and a material pump is installed in the plurality of circular holes.

[0009] Preferably, the bottom of the material pump is communicated with a material pipe, the bottom of the material pipe extends into the anti-trail shell, one end of the material pipe in the anti-trail shell penetrates through the moving plate and is communicated with the point coating head, the penetration position of the moving plate and the material pipe is fixed, the bottom of the anti-trail shell is communicated with a positioning pipe, and the positioning pipe is arranged in position corresponding to the point coating head.

[0010] Preferably, the anti-trail shell is fixed with one end of a moving rod at the top of both sides, the other end of the moving rod extends into a fixed cylinder and is fixed with a limiting block, and the fixed cylinder is installed in the installation groove formed in the bottom of the fixed strip plate.

[0011] Preferably, a circular groove is formed in one side of the top of the device bottom plate at the front and rear ends, a second electric telescopic cylinder is installed in the circular groove, and the top of the second electric telescopic cylinder is fixed with a connecting plate body.

[0012] Preferably, the bottom of the connecting plate body is fixed with a first fixed plate and a second fixed plate at both sides respectively, a motor is installed on one side of the second fixed plate, a rotating roller is connected to one side of the motor, and one end of the rotating roller away from the motor penetrates through the second fixed plate.

[0013] Preferably, the rotating roller is provided with a slot at one end, and one end of an electric heating tube is inserted into the slot, and the other end of the electric heating tube is fixed with a first fixed plate.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The utility model discloses a first electric telescopic cylinder, spot coating assembly and fixed cylinder can be combined, a plurality of anti-tail shadow housings and positioning tubes are driven to move down by the first electric telescopic cylinder, after the positioning tube moves down and contacts the diaphragm surface, the spot coating head enters the positioning tube, contacts the diaphragm, and spot coating is carried out on the diaphragm surface, after spot coating is completed, the spot coating head and the anti-tail shadow housing are directly moved up, and the spot coating head and the coating are limited by the anti-tail shadow housing and the positioning tube, which avoids the tailing phenomenon, and solves the technical problem that the traditional lithium battery diaphragm water-based PVDF spot coating device usually uses a spot coating roller to drive the spot coating element on the surface to contact the diaphragm to perform spot coating operation, when the spot coating roller rotates and drives the spot coating element to spot coating on the diaphragm surface, the spot coating element slides on the diaphragm surface, and the sliding phenomenon causes serious tailing effect of the spot pattern, which influences the precision and quality of coating.

[0016] 2. The utility model discloses the combination of the second electric telescopic cylinder, rotating roller and electric heating tube not only can drive the rotating roller to the diaphragm and carry out the pressure tightness when the diaphragm passes through the bottom of rotating roller, and, in the process that the diaphragm is spot coated, after rotating roller rotates, the diaphragm can be pulled flat, the effect of spot coating is avoided by the existence of the wrinkle on the diaphragm surface, simultaneously, the electric heating tube is inserted in the rotating roller, can heat the rotating roller, can carry out the drying treatment to the diaphragm through the rotating roller in the process that the diaphragm moves. DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the spot coating assembly structure schematic diagram of the utility model;

[0019] Figure 3 It is the rotating roller structure schematic diagram of the utility model.

[0020] In the figure: 1, device bottom plate; 101, support rod; 102, device top plate; 2, first electric telescopic cylinder; 201, material box; 202, fixed strip plate; 203, pipe body; 204, pipe cover; 205, round hole; 206, material pump; 207, material pipe; 208, anti-trail shell; 209, point coating head; 210, moving plate; 211, positioning pipe; 212, moving rod; 213, limiting block; 214, mounting groove; 215, fixed cylinder; 3, round groove; 301, second electric telescopic cylinder; 302, connecting plate body; 303, first fixed plate; 304, second fixed plate; 305, motor; 306, rotating roller; 307, insertion slot; 308, electric heating pipe. DETAILED DESCRIPTION

[0021] The utility model is further illustrated below in combination with the drawings and examples:

[0022] Example 1: a lithium battery diaphragm water-based PVDF point coating device, referring to Figures 1 to 3 , including device bottom plate 1, one end of support rod 101 is fixed at the top of four corners of device bottom plate 1, the other end of support rod 101 is fixed with device top plate 102, first electric telescopic cylinder 2 is installed at the top of device top plate 102, first electric telescopic cylinder 2 is fixed with point coating assembly through device top plate 102 at the bottom, first electric telescopic cylinder 2 is opened first, first electric telescopic cylinder 2 will drive material box 201 to move downwards, material box 201 will drive fixed strip plate 202 to move downwards, fixed strip plate 202 drives multiple anti-trail shells 208 and positioning pipes 211 to move downwards, when positioning pipe 211 abuts against the surface of diaphragm, it will drive moving rod 212 and limiting block 213, so that limiting block 213 moves upwards in fixed cylinder 215, so that fixed strip plate 202 drives point coating head 209 to continue to move downwards, so that point coating head 209 passes through anti-trail shell 208 and positioning pipe 211, and point coating head 209 is used for point coating on the diaphragm at the bottom of positioning pipe 211, in the process of point coating, material pump 206 is opened, material pump 206 will pump the coating in material box 201 out, and the coating is pumped into material pipe 207 and enters point coating head 209 for point coating, anti-trail shell 208 and positioning pipe 211 are used for limiting point coating head 209 and the coating for point coating, so that the phenomenon of tailing is avoided, and the technical problem that in the traditional lithium battery diaphragm water-based PVDF point coating device, a point coating roller is usually used to drive the point coating elements on its surface to contact the diaphragm to perform point coating operation, when the point coating roller rotates and drives these point coating elements to point coat on the surface of diaphragm, the point coating elements will slide on the surface of diaphragm, and this sliding phenomenon will cause serious tailing effect of the point pattern formed by point coating, thereby affecting the precision and quality of coating.

[0023] Specifically, referring to Figure 2The point coating assembly comprises a material box 201, a fixed strip plate 202, a circular hole 205, a material pump 206, a material pipe 207, an anti-trail shell 208, a positioning pipe 211, a point coating head 209 and a moving plate 210.

[0024] More specifically, referring to Figure 2 The top of the material box 201 is fixed with an electric telescopic cylinder, and one end of a pipe body 203 is communicated with the upper and lower ends of the side surface of the material box 201. The other end of the pipe body 203 is detachably connected with a pipe cover 204. The bottom of the material box 201 is installed with the fixed strip plate 202. A plurality of circular holes 205 are arranged in the fixed strip plate 202. The material pump 206 is installed in the plurality of circular holes 205.

[0025] Further, referring to Figure 2 The bottom of the material pump 206 is communicated with the material pipe 207. The bottom of the material pipe 207 extends into the anti-trail shell 208. One end of the material pipe 207 in the anti-trail shell 208 penetrates through the moving plate 210 and is communicated with the point coating head 209. The penetration position of the moving plate 210 and the material pipe 207 is fixed. The bottom of the anti-trail shell 208 is communicated with the positioning pipe 211. The positioning pipe 211 is arranged in correspondence with the position of the point coating head 209.

[0026] Still further, referring to Figure 2 The top of the anti-trail shell 208 is fixed with one end of the moving rod 212 on both sides. The other end of the moving rod 212 extends into the fixed cylinder 215 and is fixed with the limiting block 213. The fixed cylinder 215 is installed in the installation groove 214 arranged in the bottom of the fixed strip plate 202.

[0027] It is worth noting that, referring to Figure 1 The top of the device bottom plate 1 is arranged with a circular groove 3 on one side of the front and rear ends. The second electric telescopic cylinder 301 is installed in the circular groove 3. When the diaphragm is coated, it needs to pass through the bottom of the plurality of rotating rollers 306. When the diaphragm is coated, the second electric telescopic cylinder 301 needs to be opened. The second electric telescopic cylinder 301 drives the connecting plate body 302 and the rotating roller 306 to move downward to limit the diaphragm, avoiding displacement of the diaphragm during the coating process.

[0028] It is worth noting that, referring to Figure 3 The bottom of the connecting plate body 302 is fixed with the first fixed plate 303 and the second fixed plate 304 on both sides. The second fixed plate 304 is installed with the motor 305 on one side. The motor 305 is connected with the rotating roller 306 on one side. One end of the rotating roller 306 away from the motor 305 penetrates through the second fixed plate 304. When the diaphragm is coated and wrinkles appear, the two motors 305 are opened to drive the two rotating rollers 306 to rotate outward respectively, so as to flatten the diaphragm. After the diaphragm is flattened, the coating is carried out again.

[0029] It is worth introducing that, see Figure 3 The one end of the rotating roller 306 is provided with a slot 307, one end of an electric heating tube 308 is inserted into the slot 307, the other end of the electric heating tube 308 is fixed with a first fixed plate 303, the electric heating tube 308 extends into the rotating roller 306, after the electric heating tube 308 is turned on, the rotating roller 306 can be heated, and the diaphragm can be dried through the rotating roller 306 during the movement of the diaphragm.

[0030] When using a lithium battery diaphragm coating water-based PVDF point coating device, first open the first electric telescopic cylinder 2, the first electric telescopic cylinder 2 drives the material box 201 to move downward, the material box 201 drives the fixed strip plate 202 to move downward, the fixed strip plate 202 drives the plurality of anti-tailing shell 208 and the positioning pipe 211 to move downward, when the positioning pipe 211 abuts against the surface of the diaphragm, the moving rod 212 and the limiting block 213 are driven to move upward in the fixed cylinder 215, the fixed strip plate 202 drives the point coating head 209 to continue to move downward, the point coating head 209 passes through the anti-tailing shell 208 and the positioning pipe 211, and the diaphragm at the bottom position of the positioning pipe 211 is coated, in the coating process, the material pump 206 is opened, the material pump 206 draws the coating in the material box 201 out, and the coating is drawn into the material pipe 207 and enters the point coating head 209 to be coated, the point coating head 209 and the coating are limited by the anti-tailing shell 208 and the positioning pipe 211, and the tailing phenomenon is avoided, when the diaphragm is coated, the diaphragm needs to pass through the bottom of the plurality of rotating rollers 306, when coating, the second electric telescopic cylinder 301 is opened, the second electric telescopic cylinder 301 drives the connecting plate body 302 and the rotating roller 306 to move downward, and the diaphragm is limited, so that the diaphragm is prevented from moving during coating, when the diaphragm is wrinkled during coating, the two motors 305 are opened, and the two rotating rollers 306 are driven to rotate outward respectively, so that the diaphragm is flattened, and then coating is carried out after the diaphragm is flattened, the electric heating tube 308 extends into the rotating roller 306, and the rotating roller 306 can be heated after the electric heating tube 308 is turned on, and the diaphragm can be dried through the rotating roller 306 during the movement of the diaphragm.

[0031] In addition, the components designed in the utility model are all general standard components or components known by those skilled in the art, the structure and principle of which can be known by the technical personnel through a technical manual or through a conventional experimental method, and the technical personnel can fully realize without further description, and the content protected by the utility model does not involve improvement of the internal structure and method.

[0032] The utility model discloses an embodiment discloses the better embodiment, but is not limited to this, and the ordinary skill of the art, the spirit of the utility model is appreciated to the above -mentioned embodiment, and different extension and change are made, but as long as not departing from the spirit of the utility model, all are in the protection range of the utility model.

Claims

1. A water-based PVDF point coating device for lithium battery separator coating, comprising a device base plate (1), characterized in that, The device bottom plate (1) top four corners are fixed with one end of support rod (101), the other end of support rod (101) is fixed with device top plate (102), the top of device top plate (102) is installed with first electric telescopic cylinder (2), the bottom of first electric telescopic cylinder (2) is fixed with point coating assembly.

2. The lithium battery separator coating water-based PVDF spotting device of claim 1, wherein, The point coating assembly includes tank (201), fixed strip (202), round hole (205), pump (206), pipe (207), anti trailing shell (208), positioning pipe (211), point coating head (209), moving plate (210).

3. The lithium battery separator coating water-based PVDF spotting device of claim 2, wherein, The top of tank (201) is fixed with first electric telescopic cylinder (2), one end of pipe body (203) is communicated on the upper and lower ends of the side of tank (201), the other end of pipe body (203) is detachably connected with pipe cover (204), the bottom of tank (201) is installed with fixed strip (202), a plurality of round holes (205) are formed in the inside of fixed strip (202), and pump (206) is installed in the inside of a plurality of round holes (205).

4. The lithium battery separator aqueous PVDF spot coater of claim 2, wherein, The bottom of pump (206) is communicated with pipe (207), the bottom of pipe (207) extends into anti trailing shell (208), one end of pipe (207) in anti trailing shell (208) communicates with point coating head (209) through moving plate (210), and the penetration position of moving plate (210) and pipe (207) is fixed, the bottom of anti trailing shell (208) is communicated with positioning pipe (211), and positioning pipe (211) is arranged in position corresponding to point coating head (209).

5. The lithium battery separator aqueous PVDF spot coater of claim 2, wherein, The top of anti trailing shell (208) is fixed with one end of moving rod (212) on both sides, the other end of moving rod (212) extends into fixed cylinder (215) to fix limit block (213), and fixed cylinder (215) is installed in mounting groove (214) formed in the bottom of fixed strip (202).

6. The lithium battery separator aqueous PVDF spot coater of claim 1, wherein, The top of device bottom plate (1) is provided with round groove (3) on one side of the front and rear ends, second electric telescopic cylinder (301) is installed in the inside of round groove (3), and the top of second electric telescopic cylinder (301) is fixed with connecting plate body (302).

7. The lithium battery separator aqueous PVDF spot coater of claim 6, wherein, The bottom of connecting plate body (302) is fixed with first fixed plate (303) and second fixed plate (304) on both sides respectively, motor (305) is installed on one side of second fixed plate (304), rotating roller (306) is connected on one side of motor (305), and one end of rotating roller (306) away from motor (305) penetrates through second fixed plate (304).

8. The lithium battery separator aqueous PVDF spot coater of claim 7, wherein, One end of rotating roller (306) is provided with insertion slot (307), one end of electric heating pipe (308) is inserted into the inside of insertion slot (307), and the other end of electric heating pipe (308) is fixed with first fixed plate (303).

Images