CN210668535U - Three-dimensional substrate integrated manufacturing equipment - Google Patents
Three-dimensional substrate integrated manufacturing equipment Download PDFInfo
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- CN210668535U CN210668535U CN201921443076.6U CN201921443076U CN210668535U CN 210668535 U CN210668535 U CN 210668535U CN 201921443076 U CN201921443076 U CN 201921443076U CN 210668535 U CN210668535 U CN 210668535U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a three-dimensional substrate integrated manufacturing device, which comprises an unreeling unit, a micropore processing unit, a plasma surface treatment device, a coating unit and a reeling unit which are sequentially arranged along the direction of a substrate; plasma surface treatment device, including first ground connection roller and with a plurality of first high voltage electrode that first ground connection roller interval set up, each first high voltage electrode with form first discharge gap between the first ground connection roller, the substrate after micropore processing is attached on the first ground connection roller, and through each first discharge gap is right plasma surface treatment is carried out in the front of substrate. The high-energy electrons in the plasma can etch the surface of the base material with the depth of hundreds of nanometers, and the foreign matters or oxide layers on the surface of the base material and on the inner wall of the micropores are gasified and removed, so that the roughness and the surface tension of the base material are improved, the adhesive force between the slurry and the base material during the coating of the subsequent procedure is improved, and the cycle life and the safety of the battery are improved.
Description
Technical Field
The utility model relates to a secondary battery technical field, concretely relates to three-dimensional substrate integration manufacture equipment.
Background
With the spread of electronic devices and electric vehicles, secondary batteries are widely used. Due to the limitation of the performance of the battery pole piece, most of the traditional secondary batteries have the problems of short cycle life, high production cost and operation and maintenance cost, insufficient charge-discharge multiplying power and safety and the like.
The common battery pole piece adopts a structure that active substances are attached to the surface of a metal foil, and an adhesive needs to be added to improve the interface bonding force, so that the energy density and the cycle life of the battery are influenced. Providing through holes in a metal foil is considered to be a method for improving the electrical properties of an electrode, and as disclosed in chinese patent publication CN107871873A, the micro-sized perforations are distributed on the surface of the metal foil to increase the adhesion area between an active material and the foil, and the micro-porous structure facilitates the passage of components such as electrolyte, thereby achieving the effect of improving the charge and discharge rate, the capacity, the electrolyte injection efficiency, and the moisture drying efficiency of a battery. Because the market has higher and higher requirements on the charge-discharge multiplying power, the cycle life and the like of the battery, the improvement range of the performance by the application of the single micropore is limited, and the market demand is difficult to be fully met.
SUMMERY OF THE UTILITY MODEL
For solving the not good problem of battery sheet performance, the utility model provides a three-dimensional substrate integration manufacture equipment can be used to battery sheet preparation, further improves the battery performance.
The utility model provides a technical scheme that its technical problem adopted is:
the three-dimensional substrate integrated manufacturing equipment comprises an unreeling unit, a micropore processing unit, a plasma surface treatment device, a coating unit and a reeling unit which are sequentially arranged along the direction of a substrate;
the micropore processing unit is used for processing a plurality of penetrating micropores on at least one surface of the base material;
the plasma surface treatment device comprises a first grounding roller and a plurality of first high-voltage electrodes arranged at intervals with the first grounding roller, wherein a first discharge gap is formed between each first high-voltage electrode and the first grounding roller, a substrate subjected to micropore machining is attached to the first grounding roller, and one surface of the substrate is subjected to plasma surface treatment through each first discharge gap;
the coating unit is used for coating and drying the surface of the substrate after the surface treatment by the plasma.
Preferably, the coating mode of the coating unit is one of reverse micro-gravure coating, extrusion coating and slurry coating.
Preferably, the plasma surface treatment device further comprises a second grounding roller and a plurality of second high-voltage electrodes arranged at intervals with the second grounding roller, each second high-voltage electrode and the second grounding roller form a second discharge gap therebetween, one surface of the substrate after plasma treatment is attached to the second grounding roller, and the other surface of the substrate is subjected to plasma surface treatment through each second discharge gap.
Preferably, the coating unit comprises a front coating unit, a drying oven and a back coating unit which are sequentially arranged along the direction of the substrate, and the drying oven is provided with double-layer drying tunnels which correspond to the front coating unit and the back coating unit one to one.
Preferably, the front coating unit and the back coating unit are coated by reverse micro-gravure, and the coating thickness is 0.1-50 μm.
Preferably, the front coating unit and the back coating unit each comprise a micro-concave metering roller, a scraper and a slurry tank, the micro-concave metering roller is partially immersed in the slurry tank, the slurry is carried up by rotation, and the coating thickness is controlled by utilizing the quantitative of the scraper, the speed of the substrate and the rotation speed of the micro-concave metering roller.
Preferably, the front coating unit and the back coating unit are both coated by extrusion, and the coating thickness is 0.1-200 μm.
Preferably, a first negative pressure cavity is arranged between the coating die head of the front coating unit and the surface to be coated on the front surface of the substrate and close to the die lip, and a third negative pressure cavity is correspondingly arranged on the outer side of the back surface of the substrate; and a second negative pressure cavity is arranged between the coating die head of the reverse side coating unit and the surface to be coated on the reverse side of the substrate and close to the die lip, and a fourth negative pressure cavity is correspondingly arranged on the outer side of the front side of the substrate.
Preferably, the first negative pressure cavity and the second negative pressure cavity are both composed of two sub-cavities which are communicated with each other, wherein one sub-cavity is arranged on the corresponding coating die head, and the other sub-cavity is arranged between the coating die head and the substrate.
Preferably, the unit of coating includes positive coating unit, reverse side coating unit, a plurality of nip rolls and drying cabinet, positive coating unit and reverse side coating unit set up relatively and constitute positive and negative simultaneous coating unit, a plurality of nip rolls, drying cabinet set gradually along the substrate trend, positive coating unit and reverse side coating unit adopt extrusion coating, and the white or correspond the region at its positive and negative and evenly be equipped with a plurality of areas of leaving white along substrate length direction interval on substrate positive and negative both sides limit, a plurality of nip rolls are used for the area of leaving white of centre gripping coating back substrate two sides to make the substrate level and smooth.
Preferably, a first negative pressure cavity is arranged between the coating die head of the front coating unit and the surface to be coated on the front side of the substrate and close to the die lip, a second negative pressure cavity is arranged between the coating die head of the back coating unit and the surface to be coated on the back side of the substrate and close to the die lip, and the first negative pressure cavity and the second negative pressure cavity are symmetrically arranged on the outer side of the front side and the outer side of the back side of the substrate.
Preferably, the first negative pressure cavity and the second negative pressure cavity are both composed of two sub-cavities which are communicated with each other, wherein one sub-cavity is arranged on the corresponding coating die head, and the other sub-cavity is arranged between the coating die head and the substrate.
Preferably, the micro-pore processing mode is rolling.
Preferably, the micropore unit includes a pair of roll-in module and thickness roller, two all be equipped with mutual complex arch and shrinkage pool on the roll-in module for form the burr micropore to wearing at the substrate tow sides, then roll the burr through the thickness roller, with regulation and control burr height and burr direction.
Preferably, the micropores processed by the micropore processing unit are burr micropores, the aperture is 1-200 μm, and the pore density is 1-20000 pores/mm2The porosity is 0.1-90%, and the burr height is less than or equal to 0.1 mm; or no burr hole, the aperture is 1-200 μm, and the hole density is 1-20000 holes/mm2And the porosity is 0.1-90%.
The utility model has the advantages that:
carrying out plasma surface treatment on the surface of the base material provided with the micropores, correspondingly arranging one or more high-voltage electrodes with more than ten thousand volts according to the width of the base material attached to the grounding roller, and forming a plasma electric field between the base material and the high-voltage electrodes; when the high-voltage electrode discharges to the base material on the grounding roller, high-energy electrons in the plasma can etch the surface of the base material by several hundred nanometers in depth, so that foreign matters or oxide layers on the surface of the base material and on the inner wall of the micropore are gasified and removed, the roughness and the surface tension of the base material are improved, the adhesive force between slurry (active substances or conductive materials) and the base material during coating in the later process is improved, and the cycle life and the safety of the battery are improved.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic view of the structure of the apparatus according to the second embodiment of the present invention;
FIG. 3 is a schematic view of an embodiment of the front coating unit of FIG. 2;
fig. 4 is a schematic structural view of an apparatus according to a third embodiment of the present invention;
FIG. 5 is a schematic view of the front and back simultaneous coating unit of FIG. 4;
FIG. 6 is a structural example of the three-dimensional substrate thus obtained;
FIG. 7 is another structural example of the three-dimensional substrate produced;
in the figure: 100-an unwinding unit; 200-a micropore processing unit; 201-rolling module; 202-thickness roller; 300-a plasma surface treatment device; 301-a first grounding roller; 302-a first high voltage electrode; 303-a second grounding roller; 304-a second high voltage electrode; 401 — front side coating unit; 402-reverse side coating unit; 403-drying oven; 404-a first negative pressure cavity; 405-a second negative pressure cavity; 406-a third negative pressure cavity; 407-nip roll; 408-a coating die; 409-negative pressure coating area; 410-a dimple metering roll; 411-a scraper; 412-slurry tank; 600-a winding unit; 700-tension roller; 801-a substrate; 802-coating.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solution in the embodiments of the present invention, and the described embodiments are only some embodiments of the present invention, which cannot be understood as limitations to the protection scope of the present invention.
In the description of the present invention, the orientation or the positional relationship indicated by, for example, upper, lower, front, rear, left, right, etc. is based on the orientation or the positional relationship shown in the drawings, and it is only for convenience of description of the present invention, and the similar descriptions to the first, second, etc. are only for the purpose of distinguishing the technical features, and are not restrictive. In reference to a numerical description, the singular forms "a", "an", and "the" are intended to include the plural forms as well as plural forms and include plural referents, greater than, less than, greater than, or the like.
First embodiment
The three-dimensional substrate integrated manufacturing apparatus shown in fig. 1 comprises an unreeling unit 100, a micro-hole processing unit 200, a plasma surface treatment device 300, a coating unit and a reeling unit 600, which are sequentially arranged along the direction of a substrate 801, and further comprises a plurality of tension rollers 700 arranged between some units at intervals. After being unreeled by the unreeling unit 100, the coiled substrate 801 is processed into a plurality of through micropores on the front and back sides of the substrate 801 through the tension roller 700 and the micropore processing unit 200, then the plasma surface processing is performed on the front and back sides of the substrate 801 through the plasma surface processing device, then the surface of the substrate 801 after the plasma surface processing is coated with a coating layer through the coating unit and dried, and finally the substrate 801 is reeled through the reeling unit 600 after passing through the tension roller 700.
The micropore processing unit 200 may be processed by stamping, rolling, or laser drilling, where the stamping includes a single-sided stamping method with a high speed and a small stroke, and the double-sided matching stamping includes single-roll rolling and double-roll rolling. The formed micropores can be burr micropores with the aperture of 1-200 μm and the pore density of 1-20000 pores/mm2The porosity is 0.1-90%, and the burr height is less than or equal to 0.1 mm; or burr-free micropores, and the pore diameter, the pore density and the porosity range are the same as those of the burr micropores. The holes can be regularly arranged in an equidistant or non-equidistant mode, and the shape of the holes can be circular, polygonal or special-shaped.
In this embodiment, the micro-hole processing unit 200 includes a pair of rolling module 201 and thickness roller 202, all is equipped with the arch and the shrinkage pool of mutually supporting on two rolling module 201 for form the burr micropore of wearing at substrate 801 tow sides, then roll the burr through thickness roller 202, with control burr height and burr direction.
The plasma surface treatment device 300 comprises two groups, which are arranged at intervals along the direction of the base material 801 and are used for performing plasma surface treatment on two sides of the base material 801 containing micropores. The first group comprises a first grounding roller 301 and a plurality of first high-voltage electrodes 302 arranged at intervals with the first grounding roller 301, a first discharge gap is formed between each first high-voltage electrode 302 and the first grounding roller 301, the base material 801 after micro-hole processing is attached to the first grounding roller 301, and the front surface of the base material 801 is subjected to plasma surface treatment through each first discharge gap. And the second group comprises a second grounding roller 303 and a plurality of second high-voltage electrodes 304 which are arranged at intervals with the second grounding roller 303, a second discharge gap is formed between each second high-voltage electrode 304 and the second grounding roller 303, the front surface of the base material 801 after plasma treatment is attached to the second grounding roller 303, and the back surface of the base material 801 is subjected to plasma surface treatment through each second discharge gap.
One or more first/second high-voltage electrodes with over ten thousand volts are correspondingly arranged according to the width of the base material 801 attached to the first/second grounding roller, and a plasma electric field is formed between the base material 801 and the first/second high-voltage electrodes; when the first/second high-voltage electrode discharges the base material 801 on the first/second grounding roller, high-energy electrons in the plasma can etch the surface of the base material 801 by hundreds of nanometers in depth, and foreign matters or oxide layers on the surface of the base material 801 and on the inner wall of the micropores are gasified and removed, so that the surface roughness and the surface tension of the base material are improved, the adhesive force between the slurry (active material or conductive layer) and the base material 801 during coating in the later process is improved, and the cycle life and the safety of the battery are improved.
The coating unit comprises a front coating unit 401, a drying oven 403 and a back coating unit 402 which are sequentially arranged along the direction of the base material 801, wherein the drying oven 403 is provided with double-layer drying tunnels which correspond to the front coating unit 401 and the back coating unit 402 one by one, and one double-layer drying oven is matched with the two extrusion coating units, so that the floor area of a production line can be reduced. After the base material 801 subjected to micropore processing and plasma treatment passes through the front coating unit 401, a coating is formed on the front surface and micropore parts of the base material, then the base material passes through one drying tunnel of the drying oven 403 to be dried, and then the base material passes through the tension roller 700 and the back coating unit 402 to form a coating on the back surface and micropore parts of the base material 801, wherein the coating mode can be one of reverse micro-gravure coating, extrusion coating and slurry drawing coating.
When coating a thin layer, the reverse micro gravure coating shown in figure 1 can be adopted, and the coating thickness of one side can be controlled to be 0.1-50 μm. The front coating unit 401 and the back coating unit 402 respectively comprise a micro-concave metering roller 410, a scraper 411 and a slurry tank 412, wherein the micro-concave metering roller 410 is partially immersed in the slurry tank 412, the slurry is carried up by rotation, and the coating thickness is controlled by utilizing the quantification of the scraper 411, the speed of a base material and the rotation speed of the micro-concave metering roller 410.
Second embodiment
As shown in FIGS. 2 to 3, based on the first embodiment, the difference is that the front coating unit 401 and the back coating unit 402 are both extrusion coated, and the coating thickness can be controlled to be 0.1 to 200 μm. In order to enable the coating to be quickly soaked into the micropores and ensure the consistency of the coating structure, a first negative pressure cavity 404 is arranged between the coating die head 408 of the front coating unit 401 and the surface to be coated on the front surface of the substrate 801 and at a position close to the die lip, and a third negative pressure cavity 406 is correspondingly arranged on the outer side of the back surface of the substrate 801 and is used for forming a negative pressure coating area 409 near the area to be coated on the front surface of the substrate 801. A second negative pressure cavity is arranged between the coating die head 408 of the reverse coating unit 402 and the surface to be coated on the reverse surface of the substrate 801 and close to the die lip, and a fourth negative pressure cavity is correspondingly arranged on the outer side of the front surface of the substrate 801 and is used for forming a negative pressure coating area near the region to be coated on the reverse surface of the substrate 801.
More preferably, as shown in fig. 3, the first negative pressure cavity 404 is designed as two interconnected sub-cavities, one sub-cavity being disposed on the corresponding coating die 408, and the other sub-cavity being disposed between the coating die 408 and the substrate 801. The second vacuum chamber is similar in structure to the first vacuum chamber 404 and is not shown.
Third embodiment
The difference is that the front side coating unit 401 and the back side coating unit 402 are oppositely arranged to constitute a front and back side simultaneous coating unit as shown in fig. 4 to 5 based on the second embodiment. The base material 801 has white left on both sides of the front and back sides or has several white left areas in the corresponding areas of the front and back sides at intervals along the length direction of the base material 801, and several flattening rollers 407 are arranged between the front and back simultaneous coating unit and the drying box 403 for clamping the white left areas on both sides of the coated base material 801 to flatten the base material 801. After the base material 801 subjected to the micropore processing and the plasma treatment passes through the front coating unit 401 and the back coating unit 402 at the same time, a coating is formed on the front/back surface and the micropore part of the base material 801, and then the base material 801 is flattened by a plurality of flattening rollers 407 and dried by a drying oven 403.
In order to enable the coating to be quickly soaked into the micropores and ensure the consistency of the coating structure, a first negative pressure cavity 404 is arranged between the coating die head 408 of the front coating unit 401 and the surface to be coated on the front surface of the base material 801 and at a position close to the die lip, a second negative pressure cavity 405 is arranged between the coating die head 408 of the back coating unit 402 and the surface to be coated on the back surface of the base material 801 and at a position close to the die lip, the first negative pressure cavity 404 and the second negative pressure cavity 405 are symmetrically arranged on the outer sides of the front surface and the back surface of the base material 801, and a negative pressure coating area 409 is formed near the area to be coated on the front surface and the.
More preferably, as shown in fig. 5, the first negative pressure chamber 404 and the second negative pressure chamber 405 are each configured as two interconnected sub-chambers, one sub-chamber being disposed on the corresponding coating die 408, and the other sub-chamber being disposed between the coating die 408 and the substrate 801.
The apparatus of the above embodiment can produce a three-dimensional substrate as shown in fig. 6 (burred microwells) or fig. 7 (burrless microwells), and when the thickness of the coating 802 is significantly smaller than the pore diameter of the microwells, the coating 802 is distributed on both sides of the substrate 801 and on the inner and outer walls of the microwells, as shown in fig. 6; when the thickness of the coating 802 is slightly different from the size of the micro-pores (or significantly larger than the size of the micro-pores), the coating 802 can be attached to the surface of the substrate 801 and filled in the micro-pores to form a unitary structure, as shown in fig. 7.
The embodiment can realize the integrated continuous production of micropore processing and coating, has high production efficiency of the three-dimensional base material, can save energy consumption and improve productivity. For example, if the micropore processing and the pre-coating are carried out independently, each section of the working procedure is used for winding and unwinding independently, the number of workers needed to be equipped on the site is at least 1 and 2 respectively, namely the total number of workers is at least 3, and the embodiment only needs to be equipped with 2 workers, so that the labor cost is saved by more than 30%. In addition, due to the compact structure, the investment of equipment, the occupied area of production and the loss of the head and the tail of the base material caused by the winding and unwinding of multiple sets can be greatly reduced.
The above embodiments are for explanation of the present invention, however, the present invention is not limited to the details of the above embodiments, and various equivalent substitutions or simple modifications performed by those skilled in the art within the technical concept of the present invention should all belong to the protection scope of the present invention.
Claims (9)
1. The three-dimensional substrate integrated manufacturing equipment is characterized by comprising an unreeling unit, a micropore processing unit, a plasma surface treatment device, a coating unit and a reeling unit which are sequentially arranged along the direction of a substrate;
the micropore processing unit is used for processing a plurality of penetrating micropores on at least one surface of the base material;
the plasma surface treatment device comprises a first grounding roller and a plurality of first high-voltage electrodes arranged at intervals with the first grounding roller, wherein a first discharge gap is formed between each first high-voltage electrode and the first grounding roller, a substrate subjected to micropore machining is attached to the first grounding roller, and one surface of the substrate is subjected to plasma surface treatment through each first discharge gap;
the coating unit is used for coating and drying the surface of the substrate after the surface treatment by the plasma.
2. The integrated manufacturing equipment of claim 1, wherein the coating unit is coated in one of reverse micro-gravure coating, extrusion coating and slurry coating.
3. The integrated manufacturing equipment for the three-dimensional base material according to claim 1, wherein the plasma surface treatment device further comprises a second grounding roller and a plurality of second high voltage electrodes spaced from the second grounding roller, a second discharge gap is formed between each second high voltage electrode and the second grounding roller, one surface of the base material after plasma treatment is attached to the second grounding roller, and plasma surface treatment is performed on the other surface of the base material through each second discharge gap.
4. The three-dimensional substrate integrated manufacturing equipment according to claim 3, wherein the coating unit comprises a front coating unit, a drying oven and a back coating unit which are sequentially arranged along the direction of the substrate, and the drying oven is provided with double-layer drying tunnels corresponding to the front coating unit and the back coating unit one by one.
5. The integrated three-dimensional substrate manufacturing apparatus according to claim 4, wherein the front coating unit and the back coating unit each comprise a dimple metering roller, a doctor blade, and a slurry tank in which the dimple metering roller is partially immersed.
6. The three-dimensional substrate integrated manufacturing equipment according to claim 4, wherein the front coating unit and the back coating unit both adopt extrusion coating, a first negative pressure cavity is arranged between a coating die head of the front coating unit and a surface to be coated on the front surface of the substrate and close to a die lip, and a third negative pressure cavity is correspondingly arranged on the outer side of the back surface of the substrate; and a second negative pressure cavity is arranged between the coating die head of the reverse side coating unit and the surface to be coated on the reverse side of the substrate and close to the die lip, and a fourth negative pressure cavity is correspondingly arranged on the outer side of the front side of the substrate.
7. The three-dimensional substrate integrated manufacturing equipment according to claim 3, wherein the coating unit comprises a front coating unit, a back coating unit, a plurality of flattening rollers and a drying box, the front coating unit and the back coating unit are oppositely arranged to form a front and back simultaneous coating unit, the plurality of flattening rollers and the drying box are sequentially arranged along the moving direction of the substrate, the front coating unit and the back coating unit are coated by extrusion, two side margins of the front and back sides of the substrate are left white or a plurality of white leaving areas are uniformly arranged in the front and back corresponding areas along the length direction of the substrate at intervals, and the plurality of flattening rollers are used for clamping the white leaving areas on the two sides of the coated substrate to flatten the substrate.
8. The three-dimensional substrate integrated manufacturing equipment according to claim 7, wherein a first negative pressure cavity is arranged between the coating die head of the front coating unit and the surface to be coated on the front surface of the substrate and close to the die lip, a second negative pressure cavity is arranged between the coating die head of the back coating unit and the surface to be coated on the back surface of the substrate and close to the die lip, and the first negative pressure cavity and the second negative pressure cavity are symmetrically arranged on the outer sides of the front surface and the back surface of the substrate.
9. The integrated manufacturing equipment for the three-dimensional substrate according to claim 1, wherein the micro-hole processing unit comprises a pair of rolling modules and a thickness roller, and the rolling modules are provided with mutually matched bulges and recesses.
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| CN201921443076.6U CN210668535U (en) | 2019-08-30 | 2019-08-30 | Three-dimensional substrate integrated manufacturing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488617A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Preparation method of lithium ion battery pole piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113488617A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Preparation method of lithium ion battery pole piece |
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Effective date of registration: 20200916 Address after: 410632 Deqi formation, huichuntang village, laoliangcang Town, Ningxiang County, Changsha City, Hunan Province Patentee after: Wu Dahong Address before: 410600 No. 001 Jinzhou North Road, Ningxiang hi tech Industrial Park, Hunan, Changsha, China Patentee before: CHANGSHA LI'ANNENG ELECTRONIC TECHNOLOGY Co.,Ltd. |