Coating die head
By setting an inlet and outlet liquid tank in the coating die head, and setting blocking strips at intervals on the outlet liquid tank, the problems of high cost and high fixation accuracy requirements for coated chips are solved, thereby reducing production costs and improving product stability.
Patent Information
- Application Number
- CN202422996083.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-05
AI Technical Summary
The existing coating die head has high manufacturing costs and high precision requirements for coating chips, resulting in low product stability and high production costs.
The system employs a first mold head plate and a second mold head plate structure, with an inlet tank and an outlet tank. The outlet tank is divided into multiple outlet sub-tanks by spaced-out blocking strips, which replace chip coating and achieves intermittent coating.
This reduced production costs, increased the yield rate of solar cells, and enhanced product stability.
Smart Images
Figure CN223902179U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of solar cell, specifically, relate to a coating die. BACKGROUND
[0002] In the preparation of perovskite solar cell, etching slotting is a very important process. Etching slotting opens part of the film layer, achieves the purpose of blocking power supply, forms single module, and cell piece segmentation, constructs the circuit structure in perovskite battery, realizes multiple perovskite battery S-shaped series connection. In the preparation of perovskite solar cell, laser etching is usually used, and the precision of laser process is high. However, the laser presents a wavy shape, and the stability is low. The durability of laser etching parts is also poor.
[0003] Therefore, there are schemes in the market to avoid laser etching by improving the structure of the coating die. In the structure of the coating die, an upper die, a lower die and a coating chip are arranged. A groove is arranged on the coating chip as a liquid outlet channel, so as to realize interval coating between film layers, thereby achieving the purpose of forming single module or cell piece separation.
[0004] However, the manufacturing cost of the coating chip in the coating die in the prior art is high, and the fixing precision of the coating chip and the die sheet is high, which leads to low product stability and high production cost. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a coating die to solve the technical problems of high manufacturing cost of the coating chip in the coating die in the prior art, high fixing precision of the coating chip and the die sheet, low product stability and high production cost.
[0006] The utility model provides a coating die, which comprises a first die plate and a second die plate.
[0007] The first die plate is provided with an inlet groove and an outlet groove which are communicated with each other, and the first die plate is connected with the second die plate to form an inlet channel and an outlet channel which are communicated by cooperating with the inlet groove and the outlet groove. The inlet groove and the second die plate form an inlet, and the outlet groove and the second die plate form a coating port.
[0008] A plurality of blocking strips are arranged on the outlet groove along the extension direction of the outlet groove to separate the outlet groove into a plurality of outlet sub-grooves.
[0009] Further, a uniform groove is arranged on the first die plate, and the uniform groove is arranged between the inlet groove and the outlet groove.
[0010] Further, one end of the blocking strip is flush with the uniform groove, and the other end of the blocking strip is flush with the coating port.
[0011] Further, a plurality of said liquid inlet grooves are respectively arranged on said first die plate, and said second die plate and said liquid inlet grooves together form a plurality of said liquid inlet channels, and all said liquid inlet channels are communicated with said uniform groove.
[0012] Further, a plurality of said blocking bars are uniformly spaced on said liquid outlet groove.
[0013] Further, said coating channel is arranged along the vertical direction, and the cross-sectional area of said liquid inlet along the horizontal direction is larger than the cross-sectional area of said coating port along the horizontal direction.
[0014] Beneficial effects:
[0015] The coating die provided by the utility model has the advantages that the first die plate is provided with the liquid inlet groove and the liquid outlet groove which are communicated with each other, the second die plate is connected with the second die plate, and the liquid inlet groove and the liquid outlet groove together form the communicated liquid inlet channel and liquid outlet channel, the liquid inlet groove and the second die plate together form the liquid inlet, and the liquid outlet groove and the second die plate together form the coating port; the liquid outlet groove is provided with a plurality of blocking bars which are spaced along the extension direction of the liquid outlet groove, so that the liquid outlet groove is divided into a plurality of liquid outlet sub-grooves; the blocking bars are arranged on the liquid outlet groove of the first die plate, so that the liquid outlet groove is divided into a plurality of liquid outlet sub-grooves, and the existing coating chip is replaced, interval coating is realized, the technical problems that the manufacturing cost of the coating chip in the coating die in the prior art is high, the fixing precision requirement of the coating chip and the die piece is high, the product stability is low, and the production cost is high are solved, the qualified rate of the solar cell is improved, and the production cost of the solar cell is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.
[0017] Figure 1 It is a whole structure diagram of the coating die provided by the utility model;
[0018] Figure 2 It is a structure schematic view of the first die plate in the coating die provided by the utility model.
[0019] Icon:
[0020] 100, first die plate;
[0021] 110, liquid inlet groove; 111, liquid inlet;
[0022] 120, liquid outlet groove; 121, blocking bar; 122, liquid outlet sub-groove; 123, coating port;
[0023] 130, uniform groove;
[0024] 200, second die plate. DETAILED DESCRIPTION
[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0026] The present application will be described in further detail below through specific embodiments and in conjunction with the drawings.
[0027] As shown in Figure 1 and Figure 2 The present application provides a coating die, comprising a first die plate 100 and a second die plate 200; the first die plate 100 is provided with a liquid inlet groove 110 and a liquid outlet groove 120 which are in communication with each other, the first die plate 100 is connected with the second die plate 200, and the liquid inlet groove 110 and the liquid outlet groove 120 cooperatively form a liquid inlet passage and a liquid outlet passage which are in communication, the liquid inlet groove 110 forms a liquid inlet port 111 in cooperation with the second die plate 200, and the liquid outlet groove 120 forms a coating port 123 in cooperation with the second die plate 200; a plurality of blocking bars 121 are arranged on the liquid outlet groove 120 of the first die plate 100 at intervals along the extension direction of the liquid outlet groove 120, so as to divide the liquid outlet groove 120 into a plurality of liquid outlet sub-grooves 122.
[0028] That is, the present application provides a coating die, which divides the liquid outlet groove 120 into a plurality of liquid outlet sub-grooves 122 by arranging blocking bars 121 on the liquid outlet groove 120 of the first die plate 100 at intervals, so as to replace the existing coating chip and realize interval coating. The technical problems of high manufacturing cost of the coating chip in the coating die in the prior art, high fixing precision requirement of the coating chip and the die plate, low product stability and high production cost are solved, the qualified rate of the solar cell is improved, and the production cost of the solar cell is reduced.
[0029] Specifically, the first die plate 100 and the second die plate 200 are both long strip-shaped plates made of polyurethane, polyester resin, silicone rubber or stainless steel material. Both of them are in the shape of a rectangular plate. The first die plate 100 is provided with connecting ears on both sides for bolt connection with other parts of the coating equipment. The liquid inlet groove 110 and the liquid outlet groove 120 are both arranged on one plane of the first die plate 100, which abuts against a plane of the second die plate 200, and the first die plate 100 and the second die plate 200 can be bolted together. Thus, the liquid inlet passage and the liquid outlet passage can be formed by the corresponding plane of the second die plate 200 cooperating with the liquid inlet groove 110 and the liquid outlet groove 120. The entire coating die is arranged in the vertical direction, and the liquid outlet groove 120 is arranged below the liquid inlet groove 110, so that the opening of the liquid inlet passage for communication with the outside is the liquid inlet port 111, and the opening of the liquid outlet passage for communication with the outside is the coating port 123. The blocking strip 121 is arranged in the shape of a long strip, and the height of the blocking strip 121 is flush with the plane of the first die plate 100, so that the blocking strip 121 can separate the liquid outlet groove 120 into a plurality of liquid outlet subgrooves 122, and further separate the liquid outlet passage into a plurality of liquid outlet subpassages. Each liquid outlet subpassage is provided with an independent branch coating port 123, so as to form a perovskite solution layer with intervals during the coating process, thereby achieving the purpose of interval coating.
[0030] Further, the first die plate 100 is further provided with a uniform groove 130 arranged between the liquid inlet groove 110 and the liquid outlet groove 120.
[0031] Specifically, the uniform groove 130 is arranged in the shape of a long strip-shaped semicircular groove between the liquid inlet groove 110 and the liquid outlet groove 120, and the depth of the uniform groove 130 is slightly greater than that of the liquid outlet groove 120. By arranging the uniform groove 130, the coating solution entering the coating die through the liquid inlet passage can first enter the uniform groove 130 for buffering, and then enter the liquid outlet passage. Due to the self-tension of the liquid, the coating solution can first fill the uniform groove 130, and then enter the liquid outlet passage, thereby ensuring the uniformity of the coating solution in each liquid outlet subpassage.
[0032] Further, one end of the blocking strip 121 is flush with the uniform groove 130, and the other end of the blocking strip 121 is flush with the coating port 123.
[0033] Specifically, one end of the blocking strip 121 is flush with the uniform groove 130, and the other end of the blocking strip 121 is flush with the coating port 123, so as to completely separate each liquid outlet passage and avoid mixing of the liquid outlet passages.
[0034] Preferably, a plurality of blocking strips 121 are uniformly and spacedly arranged in the liquid outlet groove 120.
[0035] Specifically, the intervals between the respective blocking bars 121 are the same, and the interval distance can be set according to the required coating width. In this way, a plurality of uniform liquid outlet channels can be formed, and the width of each perovskite strip coated is uniform. The blocking bar 121 is generally 1 mm wide, which is consistent with the conventional laser cutting interval, and is matched with the subsequent processing steps.
[0036] Further, the coating channel is arranged in the vertical direction, and the cross-sectional area of the liquid inlet 111 in the horizontal direction is greater than the cross-sectional area of the coating outlet 123 in the horizontal direction.
[0037] Specifically, the liquid inlet groove 110 and the liquid outlet groove 120 are both square grooves, so that the liquid inlet 111 and the coating outlet 123 are both rectangular. The cross-sectional area of the liquid inlet 111 in the horizontal direction is greater than the cross-sectional area of the coating outlet 123 in the horizontal direction, so that the liquid inlet amount that can be realized by the coating die in unit time is greater than the liquid outlet amount, so as to ensure that the coating solution can fill the coating channel, and avoid uneven distribution of the solution leading to uneven coating.
[0038] In other embodiments of the present application, the liquid inlet groove 110 can also be provided with a plurality of liquid inlet grooves 110, and the plurality of liquid inlet grooves 110 are arranged on the first die plate 100, and the plurality of liquid inlet grooves 110 are arranged to form a plurality of liquid inlet channels with the second die plate 200, and all the liquid inlet channels are communicated with the uniform groove 130.
[0039] Specifically, the liquid inlet groove 110 is provided as three adjacent square grooves, which can form three liquid inlet channels with the second die plate 200, and naturally form three liquid inlets 111 on the top of the coating die, so that different coating solutions can be simultaneously obtained and input into the uniform groove 130 for mixing and simultaneous coating.
[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A coating die characterized by, The first die plate (100) and the second die plate (200) are connected to each other. The first die plate (100) is provided with a liquid inlet groove (110) and a liquid outlet groove (120) which are connected to each other. The liquid outlet groove (120) is provided with a plurality of blocking strips (121) which are arranged along the extension direction of the liquid outlet groove (120) and separate the liquid outlet groove (120) into a plurality of liquid outlet sub-grooves (122).
2. The coating die of claim 1, wherein The first die plate (100) is further provided with a uniform groove (130) which is arranged between the liquid inlet groove (110) and the liquid outlet groove (120).
3. The coating die of claim 2, wherein, One end of the blocking strip (121) is flush with the uniform groove (130), and the other end of the blocking strip (121) is flush with the coating outlet (123).
4. The coating die of claim 2, wherein A plurality of liquid inlet grooves (110) are arranged on the first die plate (100), and a plurality of liquid inlet grooves (110) are arranged on the second die plate (200) to form a plurality of liquid inlet channels.
5. The coating die of claim 1, wherein A plurality of blocking strips (121) are uniformly and spacedly arranged on the liquid outlet groove (120).
6. The coating die of any one of claims 1-5, wherein, The coating channel is arranged along the vertical direction, and the cross-sectional area of the liquid inlet (111) along the horizontal direction is greater than the cross-sectional area of the coating outlet (123) along the horizontal direction.