CN114472082A - Battery pole piece coating device - Google Patents
Battery pole piece coating device Download PDFInfo
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- CN114472082A CN114472082A CN202210289292.XA CN202210289292A CN114472082A CN 114472082 A CN114472082 A CN 114472082A CN 202210289292 A CN202210289292 A CN 202210289292A CN 114472082 A CN114472082 A CN 114472082A
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- unit
- battery pole
- pole piece
- coating
- drying
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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
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
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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
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
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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
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a battery pole piece coating device, which comprises: the first surface coating unit is used for coating slurry on the first surface of the battery pole piece, the second surface coating unit is used for coating slurry on the second surface of the battery pole piece after the first surface coating unit coats the slurry on the first surface of the battery pole piece, the distance between the first coating unit and the second coating unit can be shortened, further, the dislocation during coating of the first surface and the second surface can be conveniently adjusted, further, the material waste can be reduced, the distance from a feeding system to the first coating unit and the second surface coating unit can be reduced, further, the feeding system is simplified, the drying unit is used for drying the first surface and the second surface of the battery pole piece simultaneously after the second surface coating unit coats the slurry on the second surface of the battery pole piece, and the drying effect of the first surface and the drying effect of the second surface can be guaranteed to be consistent.
Description
Technical Field
The invention relates to the technical field of battery pole piece coating, in particular to a battery pole piece coating device.
Background
When the lithium ion battery is manufactured, pole piece coating is an extremely important process, and has important significance on the capacity, consistency, safety and the like of the lithium ion battery. When coating the positive and negative pole pieces, the mixed slurry needs to be uniformly coated on positive and negative current collectors, and the coating is carried out in the following ways in the market at present: coating the surface A, then sending the first surface into an oven for drying, then coating the second surface after the first surface is out of the oven, then sending the second surface into the oven for drying, and then finishing rolling.
The use of the above coating methods mainly has the following disadvantages:
1. the first surface and the second surface are coated separately by using two coating die heads, so that the coating dislocation of the first surface and the second surface is difficult to adjust, and materials are easily wasted;
2. the first surface and the second surface are coated separately and dried twice, so that the whole occupied area of the equipment is large, and the drying effects of the first surface and the second surface are inconsistent due to the separate baking;
3. since the first side and the second side are not coated simultaneously, the coated slurry is separately transported to the two coating dies at a long distance, and the feeding system is complicated.
Therefore, there is a need to provide a novel battery pole piece coating device to solve the above problems in the prior art.
Disclosure of Invention
The invention aims to provide a battery pole piece coating device which is convenient for adjusting the dislocation of a first surface and a second surface during coating to reduce material waste and ensure the consistent drying effect of the first surface and the second surface.
In order to achieve the above object, the coating apparatus for a battery electrode sheet according to the present invention comprises:
the first surface coating unit is used for coating slurry on the first surface of the battery pole piece;
the second surface coating unit is used for coating slurry on the second surface of the battery pole piece after the first surface coating unit coats the first surface of the battery pole piece with slurry; and
and the drying unit is used for drying the first surface and the second surface of the battery pole piece simultaneously after the second surface coating unit coats the second surface of the battery pole piece with the slurry.
The battery pole piece coating device has the beneficial effects that: the first surface coating unit is used for coating slurry on the first surface of the battery pole piece, the second surface coating unit is used for coating slurry on the second surface of the battery pole piece after the first surface coating unit coats the slurry on the first surface of the battery pole piece, the distance between the first coating unit and the second coating unit can be shortened, further, the dislocation during coating of the first surface and the second surface can be conveniently adjusted, further, the material waste can be reduced, the distance from a feeding system to the first coating unit and the second surface coating unit can be reduced, further, the feeding system is simplified, the drying unit is used for drying the first surface and the second surface of the battery pole piece simultaneously after the second surface coating unit coats the slurry on the second surface of the battery pole piece, and the drying effect of the first surface and the drying effect of the second surface can be guaranteed to be consistent.
Optionally, the transmission distance of the battery pole piece between the first surface coating unit and the drying unit is greater than the transmission distance of the battery pole piece between the second surface coating unit and the drying unit.
Optionally, the first side coating unit comprises a first coating die head and a back roll, the first coating die head and the back roll are arranged on the same horizontal plane, and the first coating die head faces the back roll, so as to coat the first side of the battery pole piece with slurry when the battery pole piece passes between the first coating die head and the back roll.
Optionally, the second side coating unit comprises a second coating die head which faces vertically upwards to coat the slurry on the second side of the battery pole piece conveyed horizontally.
Optionally, the second coating die head comprises a lip portion, a lip fixing portion and an angle adjusting portion, the lip portion is fixed to the lip fixing portion through the angle adjusting portion, and the angle between the lip portion and the lip fixing portion is adjusted through the angle adjusting portion.
Optionally, the drying unit includes a first group of guide wheels and a second group of guide wheels, and the first group of guide wheels and the second group of guide wheels are arranged up and down and used for clamping the foil blank regions of the battery pole pieces.
Optionally, the drying unit further includes a first heating subunit and a second heating subunit, the first heating subunit is disposed on one side of the first group of guide wheels, and the second heating subunit is disposed on one side of the second group of guide wheels.
Optionally, the battery pole piece coating device further comprises an unreeling unit and a reeling unit, the first surface coating unit, the second surface coating unit and the drying unit are all arranged between the unreeling unit and the reeling unit, and the transmission distance of the battery pole piece between the first surface coating unit and the unreeling unit, the transmission distance of the battery pole piece between the second surface coating unit and the unreeling unit, and the transmission distance of the battery pole piece between the drying unit and the unreeling unit are sequentially increased.
Optionally, the battery pole piece coating device further comprises a plurality of guide rollers, and the guide rollers are arranged between the unwinding unit and the winding unit and used for drawing the battery pole pieces.
Optionally, the battery pole piece coating device further comprises at least one deviation rectifying unit, wherein the deviation rectifying unit is arranged between the unwinding unit and the winding unit and used for drawing the battery pole piece so as to correct the position of the battery pole piece.
Optionally, the deviation rectifying unit includes a first side baffle, a second side baffle and a first adjusting mechanism, the first side baffle and the second side baffle are arranged oppositely and are connected to the first adjusting mechanism, and the first adjusting mechanism is used for adjusting the positions of the first side baffle and the second side baffle so as to extrude the battery pole piece through the first side baffle or the second side baffle.
Optionally, the battery pole piece coating device further comprises at least one tension adjusting unit, which is arranged between the unwinding unit and the winding unit and used for drawing the battery pole piece so as to adjust the tension of the battery pole piece.
Optionally, the tension adjusting unit includes a roller, a second adjusting structure and a fixing member, and the second adjusting structure is connected to the roller and the fixing member, and is used for adjusting the distance between the roller and the fixing member.
Optionally, the battery pole piece coating device further comprises a weight measuring unit, wherein the weight measuring unit is arranged between the drying unit and the winding unit and is used for performing density detection on the battery chip.
Drawings
FIG. 1 is a schematic structural view of a battery pole piece coating device of the present invention
FIG. 2 is a schematic diagram of the structure of a second coating die in some embodiments of the invention;
FIG. 3 is a top view of a drying unit in accordance with some embodiments of the present invention;
fig. 4 is a schematic view of a tension adjusting unit according to some embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages 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 accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
Aiming at the problems in the prior art, the embodiment of the invention provides a battery pole piece coating device. Referring to fig. 1, the battery pole piece coating apparatus includes a first side coating unit 4, a second side coating unit 5, and a drying unit 6. The first surface coating unit 4 is used for coating slurry on the first surface of the battery pole piece 13; the second surface coating unit 5 is used for coating the first surface of the battery pole piece 13 with the slurry by the first surface coating unit 4 and then coating the second surface of the battery pole piece 13 with the slurry; the drying unit 6 is configured to dry the first surface and the second surface of the battery pole piece 13 simultaneously after the second surface coating unit 5 coats the second surface of the battery pole piece 13 with the slurry.
In some embodiments, the transmission distance of the battery pole piece between the first face coating unit and the drying unit is greater than the transmission distance of the battery pole piece between the second face coating unit and the drying unit.
Referring to fig. 1, the first surface coating unit 4 includes a first coating die 41 and a backing roll 42, the first coating die 41 and the backing roll 42 are disposed at the same level, and the first coating die 41 faces the backing roll 42, for coating the slurry on the first surface of the battery pole piece 13 when the battery pole piece 13 passes between the first coating die 41 and the backing roll 42.
In some embodiments, the second side coating unit comprises a second coating die head facing vertically upward to coat the slurry on the second side of the horizontally conveyed battery pole piece.
Fig. 2 is a schematic diagram of the structure of a second coating die in some embodiments of the invention. Referring to fig. 2, the second coating die 51 includes a lip portion 511, a lip fixing portion 512, and an angle adjusting portion (not shown in the figure), the lip portion 511 being fixed to the lip fixing portion 512 by the angle adjusting portion for adjusting an angle between the lip portion 511 and the lip fixing portion 512 by the angle adjusting portion. The lip part 511 extrudes on the second surface of the battery pole piece to support the battery pole piece, and the angle of the lip part 511 relative to the lip fixing part 512 is adjusted by the angle adjusting unit, so that the extrusion force of the lip part 511 on the second surface of the battery pole piece is adjusted, and the coating effect is further adjusted,
In some embodiments, the angle adjusting portion includes a first connecting portion, a second connecting portion and an angle fixing portion, the first connecting portion is fixed to the lip portion, the second connecting portion is fixed to the lip fixing portion, the first connecting portion and the second connecting portion are connected through a shaft, and the angle fixing portion is configured to fix a position of the first connecting portion, and thus a position of the lip portion. The angle adjusting part may also be configured to adjust an angle, and is not limited in particular.
In some embodiments, the first connecting portion is provided with a plurality of through holes, one end of the angle fixing portion is movably connected with the second connecting portion, and the other end of the angle fixing portion is used for extending into the through holes to fix the position of the first connecting portion.
In some embodiments, the angle fixing portion is a telescopic rod.
Fig. 3 is a top view of a drying unit according to some embodiments of the present invention. Referring to fig. 1 and 3, the drying unit 6 includes a first group of guide wheels 61 and a second group of guide wheels 62, where the first group of guide wheels 61 and the second group of guide wheels 62 are disposed above and below each other and are used for clamping a foil blank area 64 of the battery pole piece 13 so as to suspend a coating area 63 of the battery pole piece 13 in the air and prevent the coating area 63 of the battery pole piece 13 from contacting other components, so as to ensure a drying effect.
In some embodiments, the drying unit is a single-layer oven to perform full-suspension drying on the battery pole pieces.
In some embodiments, the drying unit further includes a first heating subunit disposed at one side of the first set of guide wheels and a second heating subunit disposed at one side of the second set of guide wheels. The first heating subunit and the second heating subunit are both medium-wave infrared emission devices.
Referring to fig. 1, the coating device for the battery pole piece further includes an unwinding unit 1 and a winding unit 11, the first surface coating unit 4, the second surface coating unit 5 and the drying unit 6 are all disposed between the unwinding unit 1 and the winding unit 11, and a transmission distance of the battery pole piece 13 between the first surface coating unit 4 and the unwinding unit 1, a transmission distance of the battery pole piece 13 between the second surface coating unit 5 and the unwinding unit 1, and a transmission distance of the battery pole piece 13 between the drying unit 6 and the unwinding unit 1 become larger in sequence.
Referring to fig. 1, the coating device for the battery pole piece further includes a plurality of guide rollers 12, and the guide rollers 12 are disposed between the unwinding unit 1 and the winding unit 11 and used for drawing the battery pole piece 13.
In some embodiments, the coating device for the battery pole piece further comprises at least one deviation rectifying unit, wherein the deviation rectifying unit is arranged between the unwinding unit and the winding unit and used for drawing the battery pole piece so as to correct the position of the battery pole piece.
Referring to fig. 1, the battery pole piece coating device includes two deviation rectifying units, the two deviation rectifying units include a first deviation rectifying unit 3 and a second deviation rectifying unit 9, the first deviation rectifying unit 3 is disposed between the unwinding unit 1 and the first surface coating unit 4, and the second deviation rectifying unit 9 is disposed between the drying unit 6 and the winding unit 11.
In some embodiments, the deviation rectifying unit includes a first side baffle, a second side baffle and a first adjusting mechanism, the first side baffle and the second side baffle are disposed opposite to each other and are connected to the first adjusting mechanism, and the first adjusting mechanism is configured to adjust positions of the first side baffle and the second side baffle, so that the battery pole piece is pressed by the first side baffle or the second side baffle, and then the position of the battery pole piece is adjusted.
In some embodiments, the battery pole piece coating apparatus further includes at least one tension adjusting unit disposed between the unwinding unit and the winding unit, and configured to pull the battery pole piece to adjust the tension of the battery pole piece.
Referring to fig. 1, the battery pole piece coating device includes two tension adjusting units, the two tension adjusting units include a first tension adjusting unit 2 and a second tension adjusting unit 10, the first tension adjusting unit 2 is disposed between the unwinding unit 1 and the first deviation rectifying unit 3, and the second tension adjusting unit 10 is disposed between the winding unit 11 and the second deviation rectifying unit 9.
Fig. 4 is a schematic view of a tension adjusting unit according to some embodiments of the present invention. Referring to fig. 4, the tension adjusting unit includes a roller 21, a second adjusting structure 22 and a fixing member 23, and the second adjusting structure 22 connects the roller 21 and the fixing member 23 for adjusting a distance between the roller 21 and the fixing member 23. One side of the battery pole piece 13 is in contact with the roller 21, when the length of the second adjusting structure 22 is adjusted to be shortened, the distance between the roller 21 and the fixing part 23 is shortened, the tension of the battery pole piece 13 by the mixing wheel 21 is increased, and further the tension of the battery pole piece is increased.
In some embodiments, the second adjusting structure is an adjustable length component, and the length can be adjusted and fixed, and the specific structure is not limited herein.
In some embodiments, the battery pole piece coating device further comprises a weight measuring unit, and the weight measuring unit is arranged between the drying unit and the winding unit and is used for performing density detection on the battery chip. The weight measuring unit is a known technology in the art, and is not described in detail herein.
Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (14)
1. A battery pole piece coating device is characterized by comprising:
the first surface coating unit is used for coating slurry on the first surface of the battery pole piece;
the second surface coating unit is used for coating slurry on the second surface of the battery pole piece after the first surface coating unit coats the first surface of the battery pole piece with slurry; and
and the drying unit is used for drying the first surface and the second surface of the battery pole piece simultaneously after the second surface coating unit coats the second surface of the battery pole piece with the slurry.
2. The battery pole piece coating apparatus of claim 1, wherein a transport distance of the battery pole piece between the first face coating unit and the drying unit is greater than a transport distance of the battery pole piece between the second face coating unit and the drying unit.
3. The battery pole piece coating device according to claim 2, wherein the first surface coating unit comprises a first coating die head and a back roll, the first coating die head and the back roll are arranged on the same horizontal plane, and the first coating die head faces the back roll for coating the slurry on the first surface of the battery pole piece when the battery pole piece passes between the first coating die head and the back roll.
4. The battery pole piece coating apparatus of claim 2, wherein the second side coating unit comprises a second coating die head which faces vertically upwards to coat the slurry on the second side of the battery pole piece conveyed horizontally.
5. The battery pole piece coating device according to claim 4, wherein the second coating die head comprises a lip portion, a lip fixing portion and an angle adjusting portion, the lip portion is fixed on the lip fixing portion through the angle adjusting portion, and the angle between the lip portion and the lip fixing portion is adjusted through the angle adjusting portion.
6. The battery pole piece coating device of claim 1, wherein the drying unit comprises a first set of guide wheels and a second set of guide wheels, and the first set of guide wheels and the second set of guide wheels are arranged up and down and used for clamping a foil blank area of the battery pole piece.
7. The battery pole piece coating apparatus of claim 6, wherein the drying unit further comprises a first heating subunit and a second heating subunit, the first heating subunit being disposed at one side of the first set of guide wheels, the second heating subunit being disposed at one side of the second set of guide wheels.
8. The battery pole piece coating device according to claim 1, further comprising an unwinding unit and a winding unit, wherein the first surface coating unit, the second surface coating unit and the drying unit are all arranged between the unwinding unit and the winding unit, and a transmission distance of the battery pole piece between the first surface coating unit and the unwinding unit, a transmission distance of the battery pole piece between the second surface coating unit and the unwinding unit, and a transmission distance of the battery pole piece between the drying unit and the unwinding unit become larger in sequence.
9. The battery pole piece coating device of claim 8, further comprising a plurality of guide rollers, wherein the plurality of guide rollers are arranged between the unwinding unit and the winding unit and used for drawing the battery pole piece.
10. The battery pole piece coating apparatus of claim 8, further comprising at least one deviation rectifying unit, wherein the deviation rectifying unit is disposed between the unwinding unit and the winding unit, and is configured to pull the battery pole piece to correct the position of the battery pole piece.
11. The battery pole piece coating device of claim 10, wherein the deviation rectifying unit comprises a first side baffle, a second side baffle and a first adjusting mechanism, the first side baffle and the second side baffle are oppositely arranged and are connected with the first adjusting mechanism, and the first adjusting mechanism is used for adjusting the positions of the first side baffle and the second side baffle so as to extrude the battery pole piece through the first side baffle or the second side baffle.
12. The coating device for battery pole pieces of claim 8, further comprising at least one tension adjusting unit disposed between the unwinding unit and the winding unit for pulling the battery pole pieces to adjust the tension of the battery pole pieces.
13. The battery pole piece coating device according to claim 12, wherein the tension adjusting unit comprises a roller, a second adjusting structure and a fixing member, and the second adjusting structure is connected with the roller and the fixing member and used for adjusting the distance between the roller and the fixing member.
14. The coating device for the battery pole pieces of claim 8, further comprising a weight measuring unit, wherein the weight measuring unit is arranged between the drying unit and the winding unit and is used for detecting the density of the battery chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289292.XA CN114472082A (en) | 2022-03-23 | 2022-03-23 | Battery pole piece coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289292.XA CN114472082A (en) | 2022-03-23 | 2022-03-23 | Battery pole piece coating device |
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| Publication Number | Publication Date |
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| CN114472082A true CN114472082A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210289292.XA Pending CN114472082A (en) | 2022-03-23 | 2022-03-23 | Battery pole piece coating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023229269A1 (en) * | 2022-05-25 | 2023-11-30 | 주식회사 엘지에너지솔루션 | Electrode manufacturing device and electrode manufacturing method using same |
-
2022
- 2022-03-23 CN CN202210289292.XA patent/CN114472082A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023229269A1 (en) * | 2022-05-25 | 2023-11-30 | 주식회사 엘지에너지솔루션 | Electrode manufacturing device and electrode manufacturing method using same |
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