CN216631437U

CN216631437U - Battery diaphragm surface coating device

Info

Publication number: CN216631437U
Application number: CN202123450969.3U
Authority: CN
Inventors: 赵天宝; 毛家容; 陈宝书
Original assignee: Yibin Lithium Energy New Material Technology Co ltd
Current assignee: Yibin Lithium Energy New Material Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-31
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the technical field of material preparation, and discloses a battery diaphragm surface coating device, which comprises: the coating machine comprises a coating plate, a main body and a scraper component, wherein the coating plate is hermetically connected onto the main body, the scraper component is positioned on the upper surface of the coating plate and used for scraping and coating slurry, and the scraper component comprises a push rod, a scraper, a baffle and a differential head; the vacuum pump is communicated with the main body, the coating plate is provided with a vacuum hole for vacuum adsorption of the fixed diaphragm, and negative pressure is formed below the coating plate through the internal channel of the main body. The device coats slurry coatings with different widths and thicknesses through the scraper component with adjustable width and height; the diaphragm is flatly and tightly attached to the coating plate through a vacuum pump capable of adjusting the pressure value, and vacuum hole marks are not generated; the heating net with adjustable temperature can meet the coating requirements of different temperatures, and the device is convenient to use, easy to operate and good in practical effect.

Description

Battery diaphragm surface coating device

Technical Field

The utility model relates to the technical field of material preparation, in particular to a battery diaphragm surface coating device.

Background

The diaphragm is one of the important components of the lithium battery, and the surface of the diaphragm is coated with an organic or inorganic coating, so that the wettability, the mechanical strength, the thermal stability and the like of the electrolyte of the diaphragm can be effectively improved, the energy density and the safety performance of the battery are effectively improved, and the method is the most common method for modifying the diaphragm.

The flat scraper coating is the most common coating method in the research of micro battery materials, but most of the flat scraper coating devices on the market have the following defects: the size of the scraper is not adjustable, and the size type of the coating membrane is limited; on one hand, the vacuum suction is not enough, and the base film can not keep good flatness in the coating process; on the other hand, the vacuum suction force is too large, and the vacuum hole dents are left after the extremely thin soft film is coated. In order to solve the problems, the film coating device suitable for micro-research is provided, and is suitable for coating the surfaces of the battery separators.

SUMMERY OF THE UTILITY MODEL

The utility model designs a battery diaphragm surface coating device, which solves the problem that the existing flat scraper coating device cannot coat a diaphragm well.

A battery separator surface coating apparatus comprising: the coating machine comprises a coating plate, a main body and a scraper component, wherein the coating plate is hermetically connected to the main body, and the scraper component is positioned on the upper surface of the coating plate and used for scraping coating slurry; the vacuum pump is communicated with the main body, the coating plate is provided with a vacuum hole for vacuum adsorption of the fixed diaphragm, and negative pressure is formed below the coating plate through the internal channel of the main body.

The main components of the utility model comprise a coating machine and a vacuum pump, wherein the upper surface of a main body of the coating machine is provided with a scraper component and a coating plate with a vacuum hole, the vacuum pump is communicated with the main body, a through hole is arranged in the main body and communicated to the lower part of the coating plate, and the vacuum pump absorbs air below the coating plate through the through hole to form vacuum negative pressure so as to ensure that a diaphragm can be tightly attached to the coating plate; the vacuum pump can adjust the adsorption affinity intensity, provides suitable negative pressure for coating the diaphragm, ensures that the diaphragm is in the dent of leveling and can not leave the vacuum hole all the time in coating process.

Furthermore, the scraper component comprises a push rod, a scraper, a baffle plate and a differential head; the baffle is connected with the push rod, the scraper is connected with the baffle through a spring, and the differential head is connected with the push rod.

The scraper component of the scraper component comprises a push rod, a scraper, a baffle and a differential head, wherein the baffle is connected with the push rod, so that the phenomenon that the whole weight of the baffle is applied to a diaphragm and the deformation such as wrinkles is generated on two sides of the diaphragm in the coating process is avoided; a small spring is arranged behind the scraper and connected with the baffle plate, so that the scraper is prevented from sliding downwards; the two ends of the push rod are provided with differential heads which are fixed at the left end and the right end of the push rod through stepped holes on the push rod, and the height of the scraper is adjusted through the differential heads, so that the coating thickness precision of the diaphragm is ensured.

Furthermore, a heating net is arranged below the coating plate, and the size of the heating net is matched with that of the coating plate.

According to the utility model, the heating net with a proper size is arranged below the coating plate, so that different coating temperatures can be adjusted when the diaphragm is coated.

Furthermore, the upper surface of the main body is provided with a chute, and a reciprocating piston mechanism is arranged in the main body; the push rod is connected with the piston mechanism through the chute to do reciprocating motion.

The upper surface of the main body of the coating machine is provided with a chute, the interior of the main body is provided with a piston mechanism which reciprocates along the direction of the chute, and a push rod is connected on the piston mechanism and reciprocates to drive a scraper to scrape and coat slurry.

Furthermore, the main body is provided with a panel, a starting key and a button, the panel is used for setting the temperature of the heating net, the starting key is used for starting the piston mechanism to do reciprocating motion, and the button is used for adjusting the motion speed of the push rod.

Furthermore, a graduated scale for displaying the width adjustment of the baffle is arranged on the push rod.

The push rod is provided with the graduated scale, and the widths of the baffle plates can be adjusted by the graduated scale when the diaphragms with different sizes are coated, so that the width of the scraper controlled by the baffle plates is matched with the diaphragms to be coated.

Further, one end of the coating plate is provided with a clamping plate for assisting in fixing the diaphragm.

One end of the coating plate is provided with a clamping plate, and one side of the diaphragm is fixed on the clamping plate when the diaphragm is coated, so that the diaphragm cannot slide.

Further, the end of the above-mentioned coated plate is provided with a waste box for recovering the separator.

The tail end of the coating plate is provided with the waste material box, so that redundant slurry can be temporarily stored conveniently.

The utility model has the following beneficial effects: the device can adjust the size of the scraper and the adsorption strength of the vacuum pump, and can ensure that the diaphragm is always smooth on the coating plate by matching with the clamping plate to assist in fixing the diaphragm; secondly, the scraper, the baffle and the push rod are fixed and only slightly contact with the diaphragm, so that the edge of the diaphragm is prevented from being wrinkled during coating; in addition, the heating net can be set to different temperatures, so that the coating machine is suitable for different coating requirements; the whole device has simple structure, good practical effect and easy operation.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

figure 2 is a block diagram of the doctor assembly of the present invention.

In the figure: 1-a coating machine; 10-coating a board; 101-vacuum holes; 102-a heating net; 11-a body; 111-a panel; 112-start key; 113-a button; 12-a splint; 13-a scraper assembly; 131-a push rod; 132-a scraper; 133-a baffle; 134-scale; 135-differential head; 14-waste bin; 2-a vacuum pump; 3-a chute.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

Examples

Referring to fig. 1 to 2, the present invention provides a battery separator surface coating apparatus including: the coating machine 1 is communicated with a vacuum pump 2 capable of adjusting the pressure value, the coating machine 1 is communicated with the vacuum pump 2, and the coating machine 1 comprises three parts, namely a coating plate 10, a main body 11 and a scraper component 13.

The coating plate 10 is hermetically fixed on the main body 11, the vacuum holes 101 are formed in the plate, the vacuum holes 101 are used for forming negative pressure on the coating plate 10, a diaphragm is conveniently fixed on the coating plate 10, the vacuum holes 101 are dense and distributed on the coating plate 10 in a penetrating mode, the diameter of each vacuum hole 101 is as small as possible, and the phenomenon that the diaphragm is dented due to the fact that the diaphragm is too large and the diaphragm is affected in use is avoided.

A blade assembly 13 is disposed above the coating plate 10, and the blade assembly 13 includes a push rod 131, a blade 132, a baffle 133 and a micro head 135. The baffle 133 is sleeved on the push rod 131, the scraper 132 is connected with the baffle 133 through a tiny spring, and the two ends of the push rod 131 are provided with the differential heads 135 which are fixed through stepped holes; the push rod 131 is provided with a graduated scale 134, the baffle 133 can move along the push rod 131, and the width of the scraper 132 is adjusted; the differential head 135 may be set to a height to adjust the distance between the blade 132 and the coating plate 10 to coat different thicknesses of slurry.

A clamping plate 12 is provided at one end of the coating plate 10, and the clamping plate 12 is used to fix the membrane to prevent the membrane from being displaced during the coating process.

The tail end of the coating plate 10 is provided with the waste material box 14, and the redundant slurry after coating is scraped into the waste material box 14 along with the scraper 132, so that the slurry can be recycled uniformly and the external environment is not polluted.

The upper surface of the main body 11 is hermetically connected with the coating plate 10, a heating net 102 with a size matched with that of the coating plate 10 is arranged below the coating plate 10, and the coating plate 10 can be heated by the heating net 102 to meet the coating requirements of different diaphragms; the main body 11 is provided with a through hole inside, the through hole is communicated with the bottom of the coating plate 10, when the membrane is laid on the coating plate 10, the vacuum pump 2 sucks air below the membrane through the through hole and the vacuum hole 101 to form negative pressure, so that the membrane is tightly attached to the coating plate 10.

The upper surface of the main body 11 is provided with a sliding chute 3, and the length of the sliding chute 3 is slightly larger than that of the coating plate 10; the inside piston mechanism that is equipped with conveyer belt and micro motor and drives of main part 11, push rod 131 is connected with piston mechanism through spout 3, and push rod 131 is reciprocating motion along with piston mechanism on spout 3, drives scraper 132 knife coating thick liquids.

The side of the main body 11 is provided with a panel 111, a start key 112 and a button 113, the panel 111 is used for setting the temperature of the heating net 102, the start key 112 is used for starting the piston mechanism to reciprocate, and the button 113 is used for adjusting the reciprocating speed of the push rod 131.

The vacuum pump 2 can adjust the pressure value, is communicated with the main body 11 through a pipe, extracts the air in the internal channel of the main body 11, and can prevent the film above the coating plate 10 from generating vacuum hole dents or causing film damage by adjusting the proper pressure value.

The device overcomes the defects of the existing flat scraper coating device in the market, can adjust the width of the scraper 132 according to the width of the diaphragm, and ensures that the diaphragm is flat and clings to the coating plate 10 by changing the negative pressure value below the coating plate 10 through the vacuum pump 2 capable of adjusting the pressure value.

The use method of the device comprises the following steps:

sliding the blade assembly 13 along the chute 3 to the end of the coated sheet 10; laying a diaphragm to be coated on a coating plate 10, wherein one end of the diaphragm is fixed on a clamping plate 12; opening the vacuum pump 2, and adjusting to a proper pressure value to enable the diaphragm to be flat and tightly attached to the coating plate 10; the distance between the two baffles 133 is adjusted according to the width of the diaphragm (which can be adjusted by contrasting with the graduated scale 134 on the push rod 131), so that the width of the baffle 133 connected with the scraper 132 is consistent with the width of the diaphragm; the height of the differential head 135 is adjusted according to the desired thickness of the membrane, placing the coating slurry in front of the doctor blade 132; and (3) adjusting the temperature of the heating net 102 on the panel 11, opening the starting key 112 and the button 113, slowly sliding the push rod 131, uniformly scraping the slurry on the surface layer of the diaphragm by the scraper 132, closing the heating net 102 and the vacuum pump 2 after the slurry on the surface of the diaphragm is slightly solidified and shaped, and removing the diaphragm.

The foregoing is merely a preferred embodiment of this invention which does not represent all possible forms thereof and the scope of the utility model is not limited to such specific statements and embodiments. Various other changes and modifications can be made in the teachings of the utility model disclosed herein without departing from the spirit of the utility model, and these changes and modifications are intended to be within the scope of the utility model.

Claims

1. A battery separator surface coating apparatus, comprising: the coating machine (1) comprises a coating plate (10), a main body (11) and a scraper component (13), wherein the coating plate (10) is connected to the main body (11) in a sealing manner, and the scraper component (13) is located on the upper surface of the coating plate (10) and used for scraping coating slurry; the vacuum pump (2) is communicated with the main body (11), the coating plate (10) is provided with a vacuum hole (101) for vacuum adsorption and fixing of the diaphragm, and negative pressure is formed below the coating plate (10) through an internal channel of the main body (11).

2. The battery separator surface coating apparatus of claim 1, wherein: the scraper component (13) comprises a push rod (131), a scraper (132), a baffle plate (133) and a micro head (135); the baffle (133) is connected with the push rod (131), the scraper (132) is connected with the baffle (133) through a spring, and the differential head (135) is connected with the push rod (131).

3. The battery separator surface coating apparatus of claim 2, wherein: a heating net (102) is arranged below the coating plate (10), and the size of the heating net (102) is matched with that of the coating plate (10).

4. The battery separator surface coating apparatus of claim 3, wherein: the upper surface of the main body (11) is provided with a sliding chute (3), and a reciprocating piston mechanism is arranged in the main body (11); the push rod (131) is connected with the piston mechanism through the sliding groove (3) to reciprocate.

5. The battery separator surface coating apparatus of claim 4, wherein: be equipped with panel (111), start key (112) and button (113) on main part (11), panel (111) are used for setting up the temperature of heating net (102), start key (112) are used for starting piston mechanism is reciprocating motion, button (113) are used for adjusting the velocity of motion of push rod (131).

6. The battery separator surface coating apparatus of claim 2, wherein: and a graduated scale (134) for displaying the adjusting width of the baffle (133) is arranged on the push rod (131).

7. The battery separator surface coating apparatus of claim 1, wherein: one end of the coating plate (10) is provided with a clamping plate (12) for assisting in fixing the diaphragm.

8. The battery separator surface coating apparatus according to any one of claims 1 to 7, characterized in that: the end of the coated plate (10) is provided with a waste box (14) for recycling the membrane.