CN112355477B - Electrode plate welding method for electrolytic capacitor - Google Patents
Electrode plate welding method for electrolytic capacitor Download PDFInfo
- Publication number
- CN112355477B CN112355477B CN202011296405.6A CN202011296405A CN112355477B CN 112355477 B CN112355477 B CN 112355477B CN 202011296405 A CN202011296405 A CN 202011296405A CN 112355477 B CN112355477 B CN 112355477B
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- film
- finished electrode
- electrode plate
- welding
- finished
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- 238000003466 welding Methods 0.000 title claims abstract description 50
- 239000003990 capacitor Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 238000007731 hot pressing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 26
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 25
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 25
- 238000007747 plating Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007688 edging Methods 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000003792 electrolyte Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract description 2
- 230000008018 melting Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Abstract
The invention discloses a welding method of an electrolytic capacitor electrode slice, which comprises the steps of secondary hot pressing, quick cooling and shaping. The invention adopts laser to melt two different metals, and the welding is firm and reliable; the bonding surface of the heated film and the finished electrode plate is in a liquid state, and part of the film is permeated into the air holes on the surface of the finished electrode plate, so that the effective contact area of the finished electrode plate and the film is increased, the adhesive force of the finished electrode plate and the film is improved, the adhesive force of the finished electrode plate and the film is more stable, the sealing performance of an electric core is improved, and the leakage of an electrolytic capacitor is prevented. Meanwhile, the tensile force value of the film and the finished electrode slice, which is resistant to electrolyte corrosion, is obviously improved, so that the sealing performance of the battery cell is improved, and the leakage of the electrolytic capacitor is further prevented.
Description
Technical Field
The invention belongs to the technical field of electronic components, and particularly relates to a welding method for an electrode plate of an electrolytic capacitor.
Background
In the welding process of the electrode plate of the electrolytic capacitor and the copper nickel plating plate, the copper nickel plating plate is a very thin plate, in the welding process of the electrode plate of the electrolytic capacitor and the copper nickel plating plate, the traditional welding mode adopts laser welding to be processed on the electrode plate and the copper nickel plating plate, and the temperature of the contact points among the copper nickel plating plate, the electrode plate and the welding head is increased, when the temperature reaches the melting points of the electrode plate and the copper nickel plating plate, the electrode plate and the copper nickel plating plate are melted, and the electrode plate and the copper nickel plating plate are melted. However, the biggest problem of welding the electrode plate and the copper nickel plating plate is: the tensile force of the welded copper nickel plating sheet and the welded electrode sheet is insufficient, and the welding quality cannot be ensured; and once the welding process has gas, the situation of cold joint can be generated, and defective products are caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a welding method for an electrode plate of an electrolytic capacitor.
The aim of the invention is achieved by the following technical scheme:
an electrolytic capacitor electrode plate welding method comprises the following steps:
s1, selecting materials: selecting a pure aluminum coiled material copper-nickel-plated coiled material, cutting, edging and shaping into a finished electrode slice size and a copper-nickel-plated slice size;
s2, hot-pressing sol: selecting a film, and fusing the film on the finished electrode plate in a hot pressing way;
s3, welding: and positioning the finished electrode plate on a copper nickel plating plate, wherein the overlapping part of the finished electrode plate and the copper nickel plating plate is a welding area, closely attaching the overlapping part of the finished electrode plate and the copper nickel plating plate, and welding at least two rows of circular welding spots on the welding area by using laser welding equipment.
Preferably, the welding spots are parallel up and down but asymmetric.
Preferably, the width of the welding area is 3-4 mm.
Preferably, the hot-pressing sol step includes:
s21, preheating: flatly laying the finished electrode plate after cutting, edging and shaping on a copper block, and inserting the copper block onto a heating rod for heating until the temperature of the finished electrode plate reaches a first temperature;
s22, attaching: preliminarily positioning a film on the finished electrode plate by using a film feeding device;
s23, hot-press lamination step: heating the attached finished electrode plates respectively for 3-8 s until the temperature of the film reaches a second temperature and the contact surface of the film and the finished electrode plates is in a micro-melting state, and stroking the film on the Ping Zaisuo finished electrode plates by using a pressing plate;
s24, a high-temperature infiltration step: placing an electromagnetic heating coil under the finished electrode slice, switching on an alternating current power supply for heating, and instantly enabling the finished electrode slice to reach a third temperature, wherein the joint surface of the film and the finished electrode slice is in a liquid state, and part of the film is permeated into air holes on the surface of the finished electrode slice;
s25, quick cooling: performing air cooling and/or water cooling on the finished electrode slice after the permeation is finished in a natural state;
s26, shaping: and heating the finished electrode plate after the rapid cooling to 140-150 ℃, and shaping the film on the finished electrode plate under high pressure until the film reaches a set shape, wherein the film is in a semi-molten state.
Preferably, the first temperature is 180-200 ℃.
Preferably, the second temperature is 130-160 ℃.
Preferably, the third temperature is 210-230 ℃.
Preferably, in the step S25, the film on the finished electrode sheet shrinks by 0.1mm.
The beneficial effects of the invention are mainly as follows:
1. two different metals are melted by laser, so that the welding is firm and reliable, the looseness is avoided, and the welding spot is not easy to break;
2. the welding structure with two planes clamped and fixed is adopted, welding spots are in an upper row and a lower row, and surface stress and non-point stress are arranged between the copper nickel plating sheet and the finished electrode sheet, so that the tensile force value of a welding area is increased, and the two are combined more firmly;
3. applying acting force to the film by using a pressing plate, and exhausting gas between the film and the finished electrode slice to enable the film to be closely attached to the finished electrode slice;
4. the bonding surface of the heated film and the finished electrode plate is in a liquid state, and part of the film is permeated into the air holes on the surface of the finished electrode plate, so that the effective contact area of the finished electrode plate and the film is increased, the adhesive force of the finished electrode plate and the film is improved, the adhesive force of the finished electrode plate and the film is more stable, the sealing performance of an electric core is improved, and the leakage of an electrolytic capacitor is prevented. Meanwhile, the tensile force value of the film and the finished electrode slice, which is resistant to electrolyte corrosion, is obviously improved, so that the sealing performance of the battery cell is improved, and the leakage of the electrolytic capacitor is further prevented.
Detailed Description
The following detailed description describes the invention in detail. The embodiments are not limited to the present invention, and structural, methodological, or functional modifications of the invention from those skilled in the art are included within the scope of the invention.
Not limiting, structural, methodological, or functional transformations of one of ordinary skill in the art based on these embodiments are included within the scope of the present invention.
The invention discloses a welding method of an electrolytic capacitor electrode slice, which comprises the following steps:
s1, selecting materials: cutting, edging and shaping the selected pure aluminum coiled material copper-nickel-plated coiled material with corresponding specification into the size of a finished electrode plate and the size of a copper-nickel-plated plate; of the above, the so-called corresponding specification may be a: material brand: the pure aluminum series 1145, 1060, 1100, etc. the pure aluminum coiled material of the specification is selected to prevent chemical and electrochemical side reactions of other impurities contained in the finished electrode slice inside the capacitor. The copper nickel plating sheet can be of other types, which do not belong to the design points of the invention, so that the description is omitted.
S2, hot-pressing sol: fastening a film on the finished electrode sheet, specifically comprising:
preheating: and (3) tiling the finished electrode plate on a copper block, inserting the copper block onto a heating rod, and heating until the temperature of the finished electrode plate reaches 180-200 ℃, so that the temperature of the surface of the finished electrode plate reaches the melting point of the film.
Attaching: the film is primarily fixed on the finished electrode plate by using the film feeding device, the film is made of PP material, and the film can be easily attached to the finished electrode plate because the surface temperature of the finished electrode plate reaches the melting point of the film, and the specific structure of the film feeding device is not a protection key point of the invention, so that specific details of the structure of the film feeding device are not repeated.
And (3) hot pressing and laminating: and respectively heating the attached finished electrode slices for 3-8 s until the temperature of the film reaches 130-160 ℃, wherein the film is in a micro-melting state, and the film is smoothed out of Ping Zaisuo on the finished electrode slices by using a pressing plate, and the gas between the film and the finished electrode slices is discharged, so that the film and the finished electrode slices are further attached to each other, and the bonding strength of the film and the finished electrode slices is enhanced.
High temperature infiltration step: and the electromagnetic heating coil is arranged under the finished electrode slice, electromagnetic heating is realized through the finished electrode slice which can be magnetized and the electromagnetic heating coil, and the electromagnetic heating can instantly heat the finished electrode slice to 210-230 ℃.
In the invention, the alternating current power supply is used for heating, the alternating current power supply generates an alternating current magnetic field through the electromagnetic heating coil, and only the finished electrode plate positioned right above the electromagnetic heating coil has the function of energy conversion to achieve the heating, namely, only the finished electrode plate is heated, and compared with radiation heating, the heating area is clear, and the phenomenon of uneven caused by a common heat source can be improved.
The heated bonding surface of the film and the finished electrode plate is in a liquid state, and part of the film is permeated into the air holes on the surface of the finished electrode plate, so that the effective contact area of the finished electrode plate and the film is increased, the adhesive force of the finished electrode plate and the film is improved, the adhesive force of the finished electrode plate and the film is more stable, the sealing performance of an electric core is improved, and the leakage of an electrolytic capacitor is prevented. Meanwhile, the tensile force value of the film and the finished electrode slice, which is resistant to electrolyte corrosion, is obviously improved, so that the sealing performance of the battery cell is improved, and the leakage of the electrolytic capacitor is further prevented.
And (3) quick cooling: and (3) carrying out air cooling and/or water cooling on the finished electrode slice after the permeation is finished in a natural state until the film on the finished electrode slice contracts by 0.1mm.
Shaping: and heating the finished electrode plate after the quick cooling to 140-150 ℃, shaping the film on the finished electrode plate in a semi-molten state under high pressure, and further improving the tension value resisting the corrosion of the electrolyte until the film reaches a set shape.
S3, positioning: and positioning the copper nickel plating sheet on a positioning device, positioning the finished electrode sheet on the copper nickel plating sheet, wherein the overlapping part of the finished electrode sheet and the copper nickel plating sheet is a welding area, and the width of the welding area is 3-4 mm. The welding structure with the double-sided plane clamping and fixing is adopted, so that the combination of the copper nickel plating sheet and the finished electrode sheet is firmer and difficult to be unwelded.
S4, welding: and tightly attaching the overlapped part of the finished electrode plate and the copper nickel plating plate, and welding at least two rows of circular welding spots which are parallel up and down and asymmetric on a welding area by using laser welding equipment. The welding spots are in an upper row and a lower row, and the surface stress and the non-point stress are arranged between the copper nickel plating sheet and the finished electrode sheet, so that the tensile force value of the welding area is increased, and the copper nickel plating sheet and the finished electrode sheet are combined more firmly.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (3)
1. The welding method of the electrode plate of the electrolytic capacitor is characterized in that: the method comprises the following steps:
s1, selecting materials: selecting a pure aluminum coiled material copper-nickel-plated coiled material, cutting, edging and shaping into a finished electrode slice size and a copper-nickel-plated slice size;
s2, hot-pressing sol: selecting a film, and fusing the film on the finished electrode plate in a hot pressing way;
s3, welding: positioning the finished electrode plate on a copper nickel plating plate, wherein the overlapping part of the finished electrode plate and the copper nickel plating plate is a welding area, closely attaching the overlapping part of the finished electrode plate and the copper nickel plating plate, and welding at least two rows of circular welding spots on the welding area by using laser welding equipment;
the hot-pressing sol step comprises the following steps:
s21, preheating: flatly laying the finished electrode plate after cutting, edging and shaping on a copper block, and inserting the copper block onto a heating rod for heating until the temperature of the finished electrode plate reaches a first temperature; the first temperature is 180-200 ℃;
s22, attaching: preliminarily positioning a film on the finished electrode plate by using a film feeding device;
s23, hot-press lamination step: heating the attached finished electrode slices for 3-8 s respectively, wherein the temperature of the film reaches a second temperature which is 130-160 ℃; until the contact surface of the film and the finished electrode slice is in a micro-melting state, smoothing the film Ping Zaisuo on the finished electrode slice by using a pressing plate;
s24, a high-temperature infiltration step: placing an electromagnetic heating coil under the finished electrode slice, switching on an alternating current power supply for heating, and instantly enabling the finished electrode slice to reach a third temperature which is 210-230 ℃, wherein the joint surface of the film and the finished electrode slice is in a liquid state, and part of the film is permeated into air holes on the surface of the finished electrode slice;
s25, quick cooling: performing air cooling and/or water cooling on the finished electrode slice after the permeation is finished in a natural state; the film on the finished electrode slice shrinks by 0.1mm;
s26, shaping: and heating the finished electrode plate after the rapid cooling to 140-150 ℃, and shaping the film on the finished electrode plate under high pressure until the film reaches a set shape, wherein the film is in a semi-molten state.
2. The method for welding electrode plates of an electrolytic capacitor according to claim 1, wherein the welding spots are parallel up and down but asymmetric.
3. The method for welding electrode plates of electrolytic capacitors according to claim 1, wherein the width of the welding area is 3-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011296405.6A CN112355477B (en) | 2020-11-18 | 2020-11-18 | Electrode plate welding method for electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011296405.6A CN112355477B (en) | 2020-11-18 | 2020-11-18 | Electrode plate welding method for electrolytic capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN112355477A CN112355477A (en) | 2021-02-12 |
| CN112355477B true CN112355477B (en) | 2024-01-19 |
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| CN202011296405.6A Active CN112355477B (en) | 2020-11-18 | 2020-11-18 | Electrode plate welding method for electrolytic capacitor |
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| CN211017228U (en) * | 2019-11-13 | 2020-07-14 | 江门市元熙科技有限公司 | Novel auxiliary heating device for tab adhesive tape |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190012175A (en) * | 2016-04-29 | 2019-02-08 | 누부루 인크. | Method of welding visible laser to semiconductor packaging, automotive electrical equipment, battery and other parts |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105280872A (en) * | 2015-10-20 | 2016-01-27 | 范能文 | Belt type tab, and manufacturing method and use method therefor |
| CN108649176A (en) * | 2018-04-12 | 2018-10-12 | 连云港海创电子科技有限公司 | A kind of cell cathode ear pole of high-energy density and preparation method thereof |
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| CN112355477A (en) | 2021-02-12 |
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