CN113058810A - Lithium battery coating die head and cleaning method thereof - Google Patents
Lithium battery coating die head and cleaning method thereof Download PDFInfo
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- CN113058810A CN113058810A CN202110326523.5A CN202110326523A CN113058810A CN 113058810 A CN113058810 A CN 113058810A CN 202110326523 A CN202110326523 A CN 202110326523A CN 113058810 A CN113058810 A CN 113058810A
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- cavity
- die
- material cavity
- lithium battery
- coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
Abstract
The invention discloses a lithium battery coating die head and a cleaning method thereof, and relates to the technical field of lithium battery coating, wherein the lithium battery coating die head comprises a lower die, a material cavity, an upper die, a cavity sealing plate, a coating opening and a feeding opening; the lower die is provided with at least one material cavity, and the material cavity penetrates from the top to the bottom of the lower die; the upper die is fixedly connected to the top of the lower die and seals the top opening of the material cavity; the cavity sealing plate is detachably and fixedly connected to the bottom of the lower die and seals the bottom opening of the material cavity; the front side of going up the mould with crack between the front side of lower mould forms the coating mouth, the rear side of lower mould is equipped with the feed inlet, coating mouth, material chamber, feed inlet communicate in proper order from the front to the back. The invention has the advantages that: the material cavity can be cleaned without detaching the upper die and the lower die, and the mechanical mounting precision and the mechanical positioning precision of the die head are ensured not to be changed after the material cavity is cleaned.
Description
Technical Field
The invention relates to the technical field of lithium battery coating, in particular to a lithium battery coating die head and a cleaning method thereof.
Background
Lithium ion batteries have been widely used in the fields of digital products, electric tools, electric bicycles, electric vehicles, etc., as clean power sources. The lithium battery has wide market application and high capacity demand, and the automation degree of the complex lithium battery manufacturing process is continuously improved so as to improve the product manufacturing efficiency and reduce the product manufacturing cost. The coating process is an important process in the production process of the lithium battery, after the lithium battery is coated at a high speed for a long time, the slurry remains in the coating die head, the inherent residue caused by the structural design of the die cavity is one of the reasons, the other reason is that the slurry in the die cavity is possibly denatured by the influence of the environment in the intermittent production period, and the rheological property of the slurry is changed to cause the scrapping of the slurry in the die cavity. In the long-term use process of the die head, residual slurry in the material cavity is accumulated to cause the change of the internal pressure of the die cavity, so that the material cavity needs to be cleaned periodically.
In the traditional die head design, the material cavity is of an independent closed structure, and the material cavity can only be internally cleaned through die head disassembly. For example, patent CN212493737U discloses a coating die head with adjustable cavity pressure, which comprises an upper die head and a lower die head, wherein a front end gap between the upper die head and the lower die head forms a slit coating opening; the rear end of the lower die head is provided with a feed inlet; a material storage cavity is formed in the lower die head, and the feed inlet, the material storage cavity and the slit coating port are sequentially communicated along the coating and feeding direction; the storage cavity of this coating die head is closed structure, need open upper die head and lower die head just can clean the storage cavity.
The assembly again after the disassembly of the die presents a series of problems, such as: after the die head is assembled, the gap between the die lip and the back roll is changed, the gap between the upper die lip and the lower die lip of the die lip is changed, the position of the die piece is changed, and the like, so that the repeated positioning of the position of the die head is inconsistent with that before the die head is disassembled, the width and the thickness of a coated product are changed, and the requirements of a product manufacturing process cannot be met; the process debugging causes the poor coating product and the reduced consistency of the coating product, which causes the scrapping of the coating pole piece, reduces the yield and efficiency of the process product, and increases the material consumption and the manufacturing cost of the process.
Disclosure of Invention
The invention aims to provide a lithium battery coating die head capable of cleaning a material cavity without detaching an upper die and a lower die and a cleaning method thereof.
The invention solves the technical problems through the following technical means: the lithium battery coating die head comprises a lower die (1), a material cavity (2), an upper die (3), a cavity sealing plate (4), a coating opening (5) and a feeding opening; the lower die (1) is provided with at least one material cavity (2), and the material cavity (2) penetrates from the top to the bottom of the lower die (1); the upper die (3) is fixedly connected to the top of the lower die (1) and seals the top opening of the material cavity (2); the cavity sealing plate (4) is detachably and fixedly connected to the bottom of the lower die (1) and seals the bottom opening of the material cavity (2); go up the front side of mould (3) with crack between the front side of lower mould (1) forms coating mouth (5), the rear side of lower mould (1) is equipped with the feed inlet, coating mouth (5), material chamber (2), feed inlet communicate in proper order from the front to the back. The bottom opening in material chamber is sealed by the chamber sealing board when normally coating, prevents effectively that the thick liquids from flowing, when needing to wash remaining thick liquids in the material chamber, removes the chamber sealing board and can make remaining thick liquids flow from the bottom opening in material chamber. The through type material cavity design provides a storage space for the deposited slurry, the cavity sealing plate which can be detachably connected realizes that the cavity can be cleaned without detaching the upper die from the lower die, the mechanical installation precision and the mechanical positioning precision of the die head after the cavity is cleaned are ensured not to be changed at all, the cleaning and maintenance efficiency of the die head is improved, the repeated installation and positioning of the die head are avoided, and the problem of scrapping of coating debugging caused by repeated installation and positioning of the die head is solved.
As an optimized technical scheme, the material cavity (2) comprises an upper cavity channel and a lower cavity channel, the upper cavity channel is a part from the top opening of the material cavity (2) to the middle part of the material cavity (2), the lower cavity channel is a part from the middle part of the material cavity (2) to the bottom opening of the material cavity (2), the bottom of the upper cavity channel is an arc surface, the upper end of the lower cavity channel is communicated with the bottommost end of the arc surface of the upper cavity channel, and the lower cavity channel is vertically arranged. The structural design of the material cavity ensures that the slurry can completely flow out of the material cavity along the lower pipeline under the action of gravity.
As an optimized technical scheme, the upper die (3) is fixedly connected with the lower die (1) through fastening screws.
As an optimized technical scheme, the cavity sealing plate (4) is fixedly connected with the lower die (1) through fastening screws.
As an optimized technical scheme, a sealing mechanism is arranged between the cavity sealing plate (4) and the lower die (1). The cavity sealing plate can completely seal the material cavity by means of a sealing mechanism and ensure that the pressure in the material cavity is unchanged.
As an optimized technical scheme, the sealing mechanism adopts a sealing gasket.
As an optimized technical scheme, the sealing mechanism adopts sealing glue.
As an optimized technical scheme, the lithium battery coating die head further comprises a coating die sheet (6), the coating die sheet (6) is fixedly connected between the upper die (3) and the lower die (1), and an opening for communicating the material cavity (2) with the coating opening (5) is formed in the coating die sheet (6). By mounting different configurations of coating dies, different coating configurations can be achieved, and the desired coated product can be achieved by sizing the coating dies.
A method of cleaning a lithium battery coating die comprising the steps of: and (3) detaching a cavity sealing plate (4) of the lithium battery coating die head, and discharging the residual slurry in the material cavity (2) from the bottom opening of the material cavity (2) under the action of gravity. The die head is simple to operate, the material cavity can be cleaned without detaching the upper die and the lower die, the cavity sealing plate is installed after cleaning is finished, and the die head can be recovered to use.
As an optimized technical scheme, the method also comprises the following steps: after the cavity sealing plate (4) is detached, the coating opening (5) is sealed, a feeding system continues to feed into the material cavity (2) through the feeding opening, so that the internal pressure of the material cavity (2) is increased, and the residual slurry in the material cavity (2) is extruded by new slurry and discharged from the bottom opening of the material cavity (2). The material cavity can be cleaned more efficiently.
The invention has the advantages that: the die head cleaning device has the advantages that the material cavity can be cleaned without detaching the upper die and the lower die, the mechanical installation precision and the mechanical positioning precision of the die head after the material cavity is cleaned are guaranteed not to change, the die head cleaning maintenance efficiency is improved, the repeated installation and positioning of the die head are avoided, the problem of scrapping of coating debugging caused by repeated installation and positioning of the die head is solved, and the die head cleaning device is simple in structure and flexible to operate.
Drawings
Fig. 1 is a side cross-sectional view of a lithium battery coating die according to an embodiment of the present invention.
Fig. 2 is a front sectional view of a lithium battery coating die according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 and 2, the lithium battery coating die head comprises a lower die 1, a material cavity 2, an upper die 3, a cavity sealing plate 4, a coating opening 5, a feeding opening (not shown in the figure) and a coating die 6.
At least one material cavity 2 has been seted up on lower mould 1, and material cavity 2 is used for the thick liquids of storage coating use, sets up a plurality of material cavities 2 and can guarantee that coating process thick liquids flow satisfies the demand, and material cavity 2 runs through to the bottom from the top of lower mould 1, and the material cavity is the bar chamber of length direction along the left and right sides direction of lower mould 1.
The material cavity 2 comprises an upper cavity channel and a lower cavity channel, the upper cavity channel is a part from the top opening of the material cavity 2 to the middle part of the material cavity 2, the lower cavity channel is a part from the middle part of the material cavity 2 to the bottom opening of the material cavity 2, the bottom of the upper cavity channel is an arc surface, the upper end of the lower cavity channel is communicated with the bottommost end of the arc surface of the upper cavity channel, and the lower cavity channel is vertically arranged.
Go up mould 3 fixed connection and seal the open-top of material chamber 2 at the top of lower mould 1, go up mould 3 and lower mould 1 and pass through fastening screw fixed connection.
The cavity sealing plate 4 is detachably and fixedly connected to the bottom of the lower die 1 and seals the bottom opening of the material cavity 2, and the cavity sealing plate 4 is fixedly connected with the lower die 1 through fastening screws; and a sealing mechanism is arranged between the cavity sealing plate 4 and the lower die 1, and the sealing mechanism adopts a sealing gasket, a sealant or other sealing modes.
A coating opening 5 is formed in a gap between the front side of the upper die 3 and the front side of the lower die 1, a feeding opening is formed in the rear side of the lower die 1, and the coating opening 5, the material cavity 2 and the feeding opening are sequentially communicated from front to back.
The coating matrix 6 is fixedly connected between the upper die 3 and the lower die 1 through fixing screws for connecting the upper die 3 and the lower die 1, and the coating matrix 6 is provided with an opening for communicating the material cavity 2 with the coating port 5.
A method of cleaning a lithium battery coating die comprising the steps of: and (3) detaching the cavity sealing plate 4 of the lithium battery coating die head, and discharging the residual slurry in the material cavity 2 from the bottom opening of the material cavity 2 under the action of gravity.
Example two
This example differs from the first example in that the method for cleaning a lithium battery coating die further comprises the steps of: after the cavity sealing plate 4 is detached, the coating opening 5 is sealed, the feeding system continues to feed into the material cavity 2 through the feeding opening, so that the internal pressure of the material cavity 2 is increased, and the residual slurry in the material cavity 2 is extruded by new slurry and discharged from the bottom opening of the material cavity 2.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A lithium battery coating die head is characterized in that: comprises a lower die (1), a material cavity (2), an upper die (3), a cavity sealing plate (4), a coating opening (5) and a feeding hole; the lower die (1) is provided with at least one material cavity (2), and the material cavity (2) penetrates from the top to the bottom of the lower die (1); the upper die (3) is fixedly connected to the top of the lower die (1) and seals the top opening of the material cavity (2); the cavity sealing plate (4) is detachably and fixedly connected to the bottom of the lower die (1) and seals the bottom opening of the material cavity (2); go up the front side of mould (3) with crack between the front side of lower mould (1) forms coating mouth (5), the rear side of lower mould (1) is equipped with the feed inlet, coating mouth (5), material chamber (2), feed inlet communicate in proper order from the front to the back.
2. The lithium battery coating die of claim 1, wherein: the material cavity (2) comprises an upper cavity channel and a lower cavity channel, the upper cavity channel is a part from the top opening of the material cavity (2) to the middle part of the material cavity (2), the lower cavity channel is a part from the middle part of the material cavity (2) to the bottom opening of the material cavity (2), the bottom of the upper cavity channel is an arc surface, the upper end of the lower cavity channel is communicated with the bottommost end of the arc surface of the upper cavity channel, and the lower cavity channel is vertically arranged.
3. The lithium battery coating die of claim 1, wherein: the upper die (3) is fixedly connected with the lower die (1) through a fastening screw.
4. The lithium battery coating die of claim 1, wherein: the cavity sealing plate (4) is fixedly connected with the lower die (1) through fastening screws.
5. The lithium battery coating die of claim 1, wherein: and a sealing mechanism is arranged between the cavity sealing plate (4) and the lower die (1).
6. The lithium battery coating die of claim 5, wherein: the sealing mechanism adopts a sealing gasket.
7. The lithium battery coating die of claim 5, wherein: the sealing mechanism adopts sealant.
8. The lithium battery coating die of claim 1, wherein: the lithium battery coating die head further comprises a coating die sheet (6), the coating die sheet (6) is fixedly connected between the upper die (3) and the lower die (1), and an opening for communicating the material cavity (2) with the coating opening (5) is formed in the coating die sheet (6).
9. A cleaning method for a lithium battery coating die head is characterized by comprising the following steps: the method comprises the following steps: removing the cavity closing plate (4) of the lithium battery coating die head according to any one of claims 1 to 8, wherein residual slurry in the material cavity (2) is discharged from the bottom opening of the material cavity (2) under the action of gravity.
10. The method of cleaning a lithium battery coating die as claimed in claim 9, wherein: further comprising the steps of: after the cavity sealing plate (4) is detached, the coating opening (5) is sealed, a feeding system continues to feed into the material cavity (2) through the feeding opening, so that the internal pressure of the material cavity (2) is increased, and the residual slurry in the material cavity (2) is extruded by new slurry and discharged from the bottom opening of the material cavity (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326523.5A CN113058810B (en) | 2021-03-26 | 2021-03-26 | Cleaning method of lithium battery coating die head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326523.5A CN113058810B (en) | 2021-03-26 | 2021-03-26 | Cleaning method of lithium battery coating die head |
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| CN113058810A true CN113058810A (en) | 2021-07-02 |
| CN113058810B CN113058810B (en) | 2022-05-03 |
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| CN202110326523.5A Active CN113058810B (en) | 2021-03-26 | 2021-03-26 | Cleaning method of lithium battery coating die head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115837339A (en) * | 2022-10-18 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Coating die head, coating device and coating method |
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| JPH07256188A (en) * | 1994-03-25 | 1995-10-09 | Tdk Corp | Extrusion coating applying head |
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| CN209438908U (en) * | 2018-09-20 | 2019-09-27 | 合肥国轩高科动力能源有限公司 | A kind of lithium battery coating die head with self-cleaning function |
| CN111215293A (en) * | 2020-03-13 | 2020-06-02 | 深圳市胜之行科技有限公司 | Narrow slit type coating die head for coating machine |
| CN111760757A (en) * | 2020-08-05 | 2020-10-13 | 惠州市赢合科技有限公司 | Coating die head with adjustable cavity pressure |
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2021
- 2021-03-26 CN CN202110326523.5A patent/CN113058810B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07256188A (en) * | 1994-03-25 | 1995-10-09 | Tdk Corp | Extrusion coating applying head |
| JPH1028917A (en) * | 1996-07-18 | 1998-02-03 | Nordson Kk | Method for cleaning nozzle of adhesive coater |
| CN104148238A (en) * | 2014-08-02 | 2014-11-19 | 深圳市信宇人科技有限公司 | Extrusion coating head and coating machine thereof |
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| CN209438908U (en) * | 2018-09-20 | 2019-09-27 | 合肥国轩高科动力能源有限公司 | A kind of lithium battery coating die head with self-cleaning function |
| CN111215293A (en) * | 2020-03-13 | 2020-06-02 | 深圳市胜之行科技有限公司 | Narrow slit type coating die head for coating machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115837339A (en) * | 2022-10-18 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Coating die head, coating device and coating method |
| CN115837339B (en) * | 2022-10-18 | 2024-02-09 | 宁德时代新能源科技股份有限公司 | Coating die, coating device and coating method |
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| CN113058810B (en) | 2022-05-03 |
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