CN209974927U - Processing equipment of electrolytic copper foil - Google Patents
Processing equipment of electrolytic copper foil Download PDFInfo
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- CN209974927U CN209974927U CN201920485077.0U CN201920485077U CN209974927U CN 209974927 U CN209974927 U CN 209974927U CN 201920485077 U CN201920485077 U CN 201920485077U CN 209974927 U CN209974927 U CN 209974927U
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Abstract
The utility model discloses a processing device of electrolytic copper foil, which comprises a copper dissolving tank, a sewage tank, a filter, a liquid purifying tank and a foil generating machine; the copper dissolving tank is used for generating copper sulfate electrolyte, the copper sulfate electrolyte in the copper dissolving tank is conveyed to a sewage tank, the copper sulfate electrolyte output by the sewage tank is conveyed to a liquid purifying tank after being filtered by a filter, and then conveyed to a foil generating machine for electrolytic foil generation, the foil generating machine comprises an anode plate and a cathode roller, the electrolyte is supplied between the anode plate and the cathode roller, current is conducted between the anode plate and the cathode roller, the power supply used by the electrolytic foil generation is a pulse power supply with the current direction in the positive direction, the current pulse frequency of the pulse power supply is 10Hz-1000Hz, the duty ratio is 15% -45%, and the average current density is 30-100A/dm. The utility model discloses an use pulse generator, can greatly refine the copper foil crystalline grain, improve the copper foil performance.
Description
Technical Field
The utility model relates to a copper foil processing technology, concretely relates to electrolytic copper foil processing equipment.
Background
Copper foil is an extremely thin material of copper, and with the development of science and technology, the demand of copper foil in various industries, particularly composite materials, electronic materials, decorative materials and the like, is increasing. The electrolytic copper foil is a new copper processing product, is mainly used as a conductive material of a printed circuit board and a negative electrode material of a lithium battery, and can be widely applied to building decoration materials, flexible buses, electromagnetic shielding plates, heat energy collectors and the like rolled copper foils.
Since Andonda copper smelter of New Jersey in 1937 successfully develops the electrolytic copper foil products in industrialized production by using patent principles and process approaches of Edison, the electrolytic copper foil production technology has been continuously developed, and after Gould company in USA successfully develops and realizes industrialized low-profile electrolytic copper foil products (called LP copper foil for short) in 1993, the world manufacturing electrolytic copper foil technology enters a new period, namely the development period of high-performance copper foil technology, and the development of the electrolytic copper foil technology is faster, particularly the further development of the electrolytic copper foil industry is driven along with the rapid development of industries such as lithium ion batteries and the like in recent years.
The electrolytic copper foil raw foil manufacturing process flow. The current electrolytic copper foil raw foil manufacturing process mostly adopts a roller type continuous electrolysis method, which is characterized in that a cathode roller which can rotate continuously and an anode made of insoluble materials are arranged in an electrolytic bath, the bottom of the roller is soaked in electrolyte, after current is introduced between the two electrodes, copper ions in the solution are deposited on the surface of the roller to form a copper foil, and then the copper foil is stripped, washed, dried, coiled and then subjected to other treatments.
The electrolytic copper foil is mainly applied to a lithium ion secondary battery negative current collector and a PCB (printed circuit board). Compared with high-performance alkaline batteries, rechargeable nickel-cadmium batteries and nickel-hydrogen batteries, lithium ion batteries have become the first choice of power supplies for a plurality of portable electronic products and power supplies for new energy vehicles in recent years due to the advantages of high energy density, high working voltage, no memory effect, long cycle life, small pollution, small volume, light weight, small self-discharge and the like. The electrolytic copper foil has the advantages of good conductivity, good mechanical property, simple production process, high efficiency, low cost and the like, and is widely used as a negative current collector of a lithium ion battery. With the development of battery manufacturing technology, in order to increase the energy density of a battery, the thickness of an electrolytic copper foil used for a lithium ion battery is gradually reduced, so that the copper foil is required to be thin and also to have high tensile strength and high ductility, and the defects of breakage, deformation and the like are avoided in the production, processing and use processes of the battery. Because the existing direct current electrolytic deposition process and the additive are slow in development, most of the produced electrolytic copper foil is low in tensile strength and ductility, and the requirements on the performance of the electrolytic copper foil in the production, processing and use processes of batteries are difficult to meet in the future.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an electrolytic copper foil's processing equipment is provided to production thickness is thin, and has the electrolytic copper foil of higher tensile strength and elongation, with the requirement to the electrolytic copper foil performance in satisfying the battery production processing use.
In order to solve the technical problem, the utility model adopts the following technical scheme: the processing equipment of the electrolytic copper foil comprises a copper dissolving tank, a sewage tank, a filter, a liquid purifying tank and a raw foil machine; the copper dissolving tank is used for generating copper sulfate electrolyte, the copper sulfate electrolyte in the copper dissolving tank is conveyed to the sewage tank, the copper sulfate electrolyte output by the sewage tank is conveyed to the liquid purifying tank after being filtered by a filter, and then conveyed to the foil generating machine for electrolytic foil generation, the foil generating machine comprises an anode plate and a cathode roller, the electrolyte is supplied between the anode plate and the cathode roller, current is supplied between the anode plate and the cathode roller, and the two electrodes are connected with each other by current, and a power supply used by the electrolytic foil generation is a pulse power supply with the current direction being positive.
Optionally, the pulse frequency of the current of the pulse power supply is 10Hz-1000Hz, the duty ratio is 15% -45%, and the average current density is 30-100A/dm2。
Optionally, a heat exchanger is connected between the clean liquid tank and the foil forming machine.
The above technical scheme is adopted in the utility model, through using pulse power supply, can greatly refine the copper foil crystalline grain, improve the copper foil performance. High peak current densities can be created using pulsed power supplies and the on and off times of the current can be adjusted. When the current is conducted, copper ions are reduced at a high instantaneous current density under a very high overpotential in a short time interval, so that a very high deposition rate is obtained in the electrifying time, and therefore, crystal grains of a deposition layer become very fine, and then the concentration of the copper ions near a cathode is recovered through power failure for a certain time, so as to promote the next pulse deposition. The nucleation density can be increased due to the high current density of the power-on time, and the nucleation can be promoted and the growth of crystal grains can be prevented at the power-off interval, so that the deposited copper foil has better performance.
The specific technical solution and the advantages of the present invention will be described in detail in the following detailed description with reference to the accompanying drawings.
Drawings
The invention will be further described with reference to the accompanying drawings and specific embodiments:
fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the structure of the foil forming machine.
Detailed Description
Referring to fig. 1 and 2, an apparatus for processing an electrolytic copper foil includes a copper dissolving tank, a sewage tank, a filter, a liquid purifying tank, and a foil forming machine; the copper dissolving tank is used for generating copper sulfate electrolyte, the copper sulfate electrolyte in the copper dissolving tank is conveyed to the sewage tank, the copper sulfate electrolyte output by the sewage tank is conveyed to the liquid purifying tank after being filtered by the filter, and then conveyed to the foil generating machine for electrolytic foil generation.
Wherein, the foil forming machine 1 comprises an anode plate 11 and a cathode roller 12, electrolyte 13 is supplied between the anode plate and the cathode roller, current is conducted between the anode plate and the cathode roller, the power supply used by the electrolytic foil forming machine is a pulse power supply, the current direction is positive direction, the current pulse frequency is 10Hz-1000Hz, the duty ratio is 15% -45%, and the average current density is 30-100A/dm2。
In addition, a heat exchanger is connected between the clean liquid tank and the foil forming machine, so that the electrolyte entering the foil forming machine is kept at a proper temperature.
Detailed description of the preferred embodiment 1
This example 1 provides an apparatus for processing an electrolytic copper foil using the above electrolytic copper foil processing apparatus, and a 5 μm electrolytic copper foil prepared by the apparatus, which includes the steps of:
(1) dissolving copper and making liquid: putting raw materials of copper rice and copper wire into a copper dissolving tank, adding water and sulfuric acid, introducing compressed air to dissolve the raw materials to generate a copper sulfate electrolyte, and adjusting the content of copper ions in the copper sulfate electrolyte to be 60-180g/L, the concentration of the sulfuric acid to be 40-220g/L and the temperature of the copper sulfate electrolyte to be 30-60 ℃.
(2) Electrolytic foil generation: conveying the treated copper sulfate electrolyte to a dirty liquid tank; after being filtered, the mixture is conveyed to a liquid purifying tank and then conveyed to a foil generating machine through a heat exchanger for electrolytic foil generation; controlling the process condition that the average current density is 30-100A/dm2The current pulse frequency is 10Hz-50Hz, the duty ratio is 15% -45%, and the flow of the copper sulfate electrolyte is 20-60m3/h。
The 5-micron copper foil prepared in the embodiment 1 has the normal-temperature tensile strength of 300-350MPa and the normal-temperature elongation of 3% -4%.
Specific example 2
(1) Dissolving copper and making liquid: putting raw materials of copper rice and copper wire into a copper dissolving tank, adding water and sulfuric acid, introducing compressed air to dissolve the raw materials to generate a copper sulfate electrolyte, and adjusting the content of copper ions in the copper sulfate electrolyte to be 60-180g/L, the concentration of the sulfuric acid to be 40-220g/L and the temperature of the copper sulfate electrolyte to be 30-60 ℃.
(2) Electrolytic foil generation: conveying the treated copper sulfate electrolyte to a dirty liquid tank; after being filtered, the mixture is conveyed to a liquid purifying tank and then conveyed to a foil generating machine through a heat exchanger for electrolytic foil generation; controlling the process condition that the average current density is 30-100A/dm2The current pulse frequency is 50Hz-200Hz, the duty ratio is 15% -45%, and the flow of the copper sulfate electrolyte is 20-60m3/h。
The 5-micron copper foil prepared in the embodiment 2 has the normal-temperature tensile strength of 350-400MPa and the normal-temperature elongation of 4-5%.
Specific example 3
(1) Dissolving copper and making liquid: putting raw materials of copper rice and copper wire into a copper dissolving tank, adding water and sulfuric acid, introducing compressed air to dissolve the raw materials to generate a copper sulfate electrolyte, and adjusting the content of copper ions in the copper sulfate electrolyte to be 60-180g/L, the concentration of the sulfuric acid to be 40-220g/L and the temperature of the copper sulfate electrolyte to be 30-60 ℃.
(2) Electrolytic foil generation: will be provided withConveying the treated copper sulfate electrolyte to a dirty liquid tank; after being filtered, the mixture is conveyed to a liquid purifying tank and then conveyed to a foil generating machine through a heat exchanger for electrolytic foil generation; controlling the process condition that the average current density is 30-100A/dm2The current pulse frequency is 200Hz-1000Hz, the duty ratio is 15% -45%, and the flow of the copper sulfate electrolyte is 20-60m3/h。
The 5-micron copper foil prepared in the embodiment 3 has the normal-temperature tensile strength of 350-400MPa and the normal-temperature elongation of 5-7%.
In summary, as can be seen from table 1, the manufactured copper foil has excellent mechanical properties, and the copper foil can be used for a negative current collector of a lithium ion battery.
TABLE 1 electrolytic copper foil production Process parameters
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (3)
1. The processing equipment of the electrolytic copper foil comprises a copper dissolving tank, a sewage tank, a filter, a liquid purifying tank and a raw foil machine; the copper dissolving tank is used for generating copper sulfate electrolyte, the copper sulfate electrolyte in the copper dissolving tank is conveyed to a sewage tank and the copper sulfate electrolyte output by the sewage tank is conveyed to a liquid purifying tank after being filtered by a filter, and then conveyed to a foil generating machine for electrolysis to generate foil, the foil generating machine comprises an anode plate and a cathode roller, electrolyte is supplied between the anode plate and the cathode roller, and current is conducted between the anode plate and the cathode roller, and the copper dissolving tank is characterized in that: the power supply used by the electrolytic green foil is a pulse power supply with the current direction being positive.
2. The electrolytic copper foil processing apparatus according to claim 1, characterized in that: theThe current pulse frequency of the pulse power supply is 10Hz-1000Hz, the duty ratio is 15% -45%, and the average current density is 30-100A/dm2。
3. The electrolytic copper foil processing apparatus according to claim 1, characterized in that: and a heat exchanger is connected between the purified liquid tank and the foil forming machine.
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| CN201920485077.0U CN209974927U (en) | 2019-04-11 | 2019-04-11 | Processing equipment of electrolytic copper foil |
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| CN201920485077.0U CN209974927U (en) | 2019-04-11 | 2019-04-11 | Processing equipment of electrolytic copper foil |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139504A (en) * | 2020-03-23 | 2020-05-12 | 江西铜博科技有限公司 | Electrolytic copper foil preparation equipment and preparation method |
| CN112481661A (en) * | 2020-11-27 | 2021-03-12 | 九江德福科技股份有限公司 | Preparation method of fine-grain copper foil |
| CN113322496A (en) * | 2021-04-15 | 2021-08-31 | 浙江花园新能源有限公司 | Copper foil for LED light bar plate, complete production equipment and production method |
| CN113430590A (en) * | 2021-07-27 | 2021-09-24 | 江西铜博科技有限公司 | Integrated production line is cut in copper foil production |
| CN114808044A (en) * | 2022-03-22 | 2022-07-29 | 江西铜博科技有限公司 | Electrolyte circulating system |
| CN114990642A (en) * | 2022-06-15 | 2022-09-02 | 云南润久科技有限公司 | Electrolyte rapid liquid making method and circulating system in electrolytic copper foil production |
| CN115216813A (en) * | 2022-07-15 | 2022-10-21 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
| CN115216813B (en) * | 2022-07-15 | 2024-04-16 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
-
2019
- 2019-04-11 CN CN201920485077.0U patent/CN209974927U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139504A (en) * | 2020-03-23 | 2020-05-12 | 江西铜博科技有限公司 | Electrolytic copper foil preparation equipment and preparation method |
| CN112481661A (en) * | 2020-11-27 | 2021-03-12 | 九江德福科技股份有限公司 | Preparation method of fine-grain copper foil |
| CN113322496A (en) * | 2021-04-15 | 2021-08-31 | 浙江花园新能源有限公司 | Copper foil for LED light bar plate, complete production equipment and production method |
| CN113322496B (en) * | 2021-04-15 | 2022-08-09 | 浙江花园新能源股份有限公司 | Copper foil for LED light bar plate, complete production equipment and production method |
| CN113430590A (en) * | 2021-07-27 | 2021-09-24 | 江西铜博科技有限公司 | Integrated production line is cut in copper foil production |
| CN114808044A (en) * | 2022-03-22 | 2022-07-29 | 江西铜博科技有限公司 | Electrolyte circulating system |
| CN114990642A (en) * | 2022-06-15 | 2022-09-02 | 云南润久科技有限公司 | Electrolyte rapid liquid making method and circulating system in electrolytic copper foil production |
| CN115216813A (en) * | 2022-07-15 | 2022-10-21 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
| CN115216813B (en) * | 2022-07-15 | 2024-04-16 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
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Address after: 322121 Huayuan village, Nanma Town, Dongyang City, Jinhua City, Zhejiang Province Patentee after: Zhejiang Huayuan new energy Co.,Ltd. Address before: 322121 Huayuan village, Nanma Town, Dongyang City, Jinhua City, Zhejiang Province Patentee before: ZHEJIANG HUAYUAN NEW ENERGY Co.,Ltd. |