CN109545565B - Manufacturing method of solid-state aluminum electrolytic capacitor - Google Patents
Manufacturing method of solid-state aluminum electrolytic capacitor Download PDFInfo
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- CN109545565B CN109545565B CN201811315177.5A CN201811315177A CN109545565B CN 109545565 B CN109545565 B CN 109545565B CN 201811315177 A CN201811315177 A CN 201811315177A CN 109545565 B CN109545565 B CN 109545565B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
- H01G13/04—Drying; Impregnating
Abstract
The invention discloses a manufacturing method of a solid-state aluminum electrolytic capacitor. The manufacturing method comprises the working procedures of cutting, nailing and rolling, formation, impregnation, polymerization, assembly and sealing, aging test and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after polymerization for storage and sealing, the vacuum degree of the sealed vacuum storage device is-50 to-99 Kpa, the relative humidity is less than or equal to 35% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembly and sealing working procedure is less than or equal to 60s, and the vacuum storage time is less than or equal to 48 h. According to the manufacturing method, the vacuum sealing box is adopted to replace a high-temperature constant-temperature moisture-proof oven to realize moisture-proof storage of the capacitor after high-temperature polymerization and before assembly and sealing, compared with the constant-temperature storage of the drying box in the existing method, the energy consumption is lower, the daily power consumption is reduced from the original 108 ℃ to 4 ℃, the 96.30% is reduced, the energy-saving effect is obvious, and the production cost can also be obviously reduced.
Description
Technical Field
The invention relates to the technical field of solid-state capacitor manufacturing, in particular to a manufacturing method of a solid-state aluminum electrolytic capacitor.
Background
The production process of the current solid-state capacitor is roughly as follows: cutting, nailing and rolling, formation, impregnation, polymerization, assembly sealing, aging test and packaging, wherein the assembly sealing process has strict requirements on the environmental humidity, and most of the current manufacturers use the following methods: the high-temperature-resistant energy-saving environment-friendly energy-saving box is stored in an oven at a constant temperature of 85-105 ℃ for moisture prevention and dehumidification, the relative humidity of the environment outside the box is controlled to be 35% RH or even below 30% RH by using a large dehumidifier, a large amount of electric energy is consumed in the production process, the electricity consumption cost is high, and the total production cost is correspondingly increased.
Therefore, the method for producing the solid capacitor with low energy consumption and stable product quality has very important significance for energy conservation and emission reduction of solid capacitor production.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of high energy consumption and high cost of an environment humidity control method in an assembly sealing procedure in the production process of the existing solid-state capacitor, and provides a manufacturing method of a solid-state aluminum electrolytic capacitor.
The above purpose of the invention is realized by the following technical scheme:
a manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, formation, impregnation, polymerization, assembly and sealing, aging test and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after polymerization for storage, the vacuum degree of the sealed vacuum storage device is-50 to-99 Kpa, the relative humidity is less than or equal to 35% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembly and sealing working procedure is less than or equal to 60s, and the vacuum storage time is less than or equal to 48 h.
The manufacturing method of the invention uses the vacuum seal box to replace a high-temperature constant-temperature damp-proof oven before the assembling and sealing process after high-temperature polymerization, the capacitor workpiece after high-temperature polymerization is placed in the sealed vacuum storage equipment, the vacuum seal equipment is provided with the vacuum meter and the hygrometer, the damp-proof effect of the capacitor workpiece is realized by controlling the vacuum degree and the relative humidity of the sealed vacuum storage equipment, the sealed vacuum storage equipment has good retention for the vacuum degree and the environmental humidity in the equipment, the moist air in the box is pumped away by the vacuum pump without heating, the environmental requirement can be kept by intermittently pumping vacuum when the workpiece is taken, the moisture absorption of the product is avoided, and the production energy consumption and the production cost are reduced on the premise of meeting the strict requirement of the assembling and sealing process for the environmental humidity.
Controlling the vacuum degree and the relative humidity of the sealed vacuum storage equipment is a key parameter for ensuring the moisture-proof and drying of the capacitor after polymerization, and controlling the vacuum degree is favorable for ensuring that moist air can be completely pumped out, so that the dryness of the capacitor environment is ensured.
The time for taking the capacitor from the sealed vacuum storage equipment to enter the assembling and sealing process is controlled within 30s, so that the moisture absorption of the hermetically stored capacitor is prevented.
The present invention's fidelity storage time is the time the capacitor is in a sealed vacuum storage device after polymerization before waiting for the assemblage seal.
Preferably, the vacuum degree of the sealed vacuum storage equipment is maintained discontinuously by a vacuum control switch in the capacitor taking process, and the time from normal pressure to standard pressure is less than or equal to 60 s. The vacuum degree recovery time of the sealed vacuum storage equipment is controlled to ensure the stability of the whole environment, the influence of the environmental stability on the processing performance of the capacitor is great, the final performance of the capacitor product can be influenced, the environment is unstable, and the performance of the product can be greatly reduced due to the unstable humidity in the storage environment of the capacitor workpiece.
Preferably, the vacuum degree of the sealed vacuum storage device is-65 Kpa to-99 Kpa.
More preferably, the vacuum degree of the sealed vacuum storage device is-65 Kpa to-85 Kpa.
The vacuum degree of the sealed vacuum storage device is too high: the equipment requirement is too high, and the energy consumption is wasted; the vacuum degree is too low: the environmental humidity can not meet the requirement, and the performance is not good.
Preferably, the relative humidity of the sealed vacuum storage device is between 25% RH and 34% RH.
More preferably, the relative humidity of the sealed vacuum storage device is between 30% RH and 34% RH.
Preferably, the vacuum degree of the sealed vacuum storage device is-65 Kpa to-99 Kpa, and the relative humidity of the sealed vacuum storage device is 25% RH to 34% RH.
More preferably, the vacuum degree of the sealed vacuum storage device is-65 Kpa to-85 Kpa, and the relative humidity of the sealed vacuum storage device is 30% RH to 34% RH.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a manufacturing method of a solid-state aluminum electrolytic capacitor, which realizes the moisture-proof storage of a workpiece before assembling and sealing after high-temperature polymerization of the capacitor by adopting a vacuum seal box to replace a high-temperature constant-temperature moisture-proof oven, reduces the daily power consumption from the original 108 ℃ to 4 ℃ by controlling the lower energy consumption of the vacuum seal box compared with the constant-temperature storage of a drying box in the prior method, reduces 96.30%, has obvious energy-saving effect and can also obviously reduce the production cost.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the present invention is not limited to the examples in any way. The starting reagents employed in the examples of the present invention are, unless otherwise specified, those that are conventionally purchased.
The specification of the solid aluminum electrolytic capacitor of the following examples and comparative examples is 6.3V330 μ F5 × 8, and the production process is: cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging.
Example 1
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-65 Kpa, the relative humidity is 34% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is not more than 30s, and the vacuum storage time is 6 h.
The quantity of a single batch of products is 22000, and each batch of products is averagely divided into 20 parts, namely 1100 products are assembled and sealed.
Putting the polymerized product into a normal-temperature closed box, taking out one product (about 1100 products) from the whole batch for assembly and sealing, continuously putting the rest products into the closed box, vacuumizing the closed box by using a vacuum pump, closing the vacuum pump, sealing the box body, keeping the vacuum till the next product is assembled and sealed, taking out one product for assembly and sealing each time in turn till the assembly and sealing are completely finished, wherein the starting time of the vacuum pump in the whole process is about 30S 20S 600S, namely 10min, and the process of taking the product midway is as follows: breaking vacuum, opening a box door, taking a product, closing the box door, vacuumizing, closing a pump and keeping the vacuum within 2 min.
Example 2
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-75 Kpa, the relative humidity is 32% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is less than or equal to 40s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Example 3
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-85 Kpa, the relative humidity is 30% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is less than or equal to 50s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Example 4
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-50 Kpa, the relative humidity is 30% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is less than or equal to 20s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Example 5
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-99 Kpa, the relative humidity is 30% RH, the time of taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is not more than 60s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Example 6
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-65 Kpa, the relative humidity is 35% RH, the time of taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is less than or equal to 30s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Example 7
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-99 Kpa, the relative humidity is 25% RH, the time of taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is less than or equal to 60s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Comparative example 1
A manufacturing method of a solid-state aluminum electrolytic capacitor comprises the steps of putting all polymerized products into an oven which is heated to 85-105 ℃ in advance for heat preservation and storage, taking out one product (about 1100) from the whole batch for assembly and sealing, continuously putting the rest products into the oven for heat preservation and storage for assembly and sealing, taking out one product each time in sequence for assembly and sealing until the assembly and sealing are completed, and closing the oven, wherein the whole time is about 6 hours. The process of taking the product in the midway is as follows: opening the oven door, taking the product and closing the oven door, wherein the process is finished within 1min, and the oven heater is not closed in the period of time, so that the oven can continuously work.
The speed of the assembled sealing is calculated according to 60 pieces/min, and at least 22000/60 min, 366.67min, namely more than 6h is required for completing the assembled sealing of 1 batch of products.
Comparative example 2
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-45 Kpa, the relative humidity is 38% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is not more than 20s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Comparative example 3
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-110 Kpa, the relative humidity is 30% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is not more than 30s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Comparative example 4
A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, forming, impregnating, polymerizing, assembling and sealing, aging testing and packaging, wherein the solid capacitor is directly placed into a sealed vacuum storage device after being polymerized for storage, the vacuum degree of the sealed vacuum storage device is-55 Kpa, the relative humidity is 38% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembling and sealing working procedure is not more than 35s, and the vacuum storage time is 6 h.
The specific operation was the same as in example 1.
Result detection
Table 1 shows the energy consumption of examples and comparative examples
| Serial number | Power of | Total time of day | Time to completion of single portion | Time of use | Energy consumption | Daily power consumption |
| Example 1 | 4.5KW | 6H | 30s | 10min | 0.75 degree | 3 degree |
| Example 2 | 4.5KW | 6H | 40s | 13.3min | 1.00 degree | 4 degree |
| Example 3 | 4.5KW | 6H | 50s | 16.7min | 1.25 degree | 5 degree |
| Example 4 | 4.5KW | 6H | 20s | 6.7min | 0.5 degree | 2 degree |
| Example 5 | 4.5KW | 6H | 60s | 20min | 1.50 degree | 6 degree |
| Example 6 | 4.5KW | 6H | 30s | 10min | 0.75 degree | 3 degree |
| Example 7 | 4.5KW | 6H | 60s | 20min | 1.50 degree | 6 degree |
| Comparative example 1 | 6.0KW | 6H | / | 6H | 27 degree | 108 degree |
| Comparative example 2 | 4.5KW | 6H | 20s | 6.7min | 0.5 degree | 2 degree |
| Comparative example 3 | 4.5KW | 6H | 60s | 20min | 1.50 degree | 6 degree |
| Comparative example 4 | 4.5KW | 6H | 25s | 8.3min | 0.62 degree | 2.5 degree |
The required vacuum degrees of the embodiment and the comparative example are different, the corresponding vacuum pumps have different use times, and the use time of the vacuum pump for completing one product is tested by using a stopwatch under the condition of the required vacuum degree of the production and is as shown in the table, so that the use time of only the required vacuum pump for completing one batch of products 22000 can be obtained, and the electric energy consumption required by one day of production is calculated.
The performance of the capacitors prepared in the examples and the comparative examples is detected, and the detection method comprises the following steps: 50 products were subjected to a high temperature load life test at 105 ℃ and 2000H, and the test results are shown in Table 2.
Table 2 shows properties of the products obtained in examples and comparative examples
The table shows the variation of the parameters after the life test of 2000H at 105 ℃ was performed after the production of the product under the conditions of each example and comparative example.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A manufacturing method of a solid aluminum electrolytic capacitor comprises the working procedures of cutting, nailing and rolling, formation, impregnation, polymerization, assembly and sealing, aging test and packaging, and is characterized in that the solid capacitor is directly placed into a sealed vacuum storage device after polymerization for storage and sealing, the vacuum degree of the sealed vacuum storage device is-50 to-99 Kpa, the relative humidity is less than or equal to 35% RH, the time for taking the capacitor from the sealed vacuum storage device to enter the assembly and sealing working procedure is less than or equal to 60s, and the vacuum storage time is less than or equal to 48 h.
2. The manufacturing method according to claim 1, wherein the degree of vacuum of the sealed vacuum storage device during the taking of the capacitor is intermittently maintained by a vacuum control switch, and the time from the normal pressure to the degree of vacuum is 30s or less.
3. The manufacturing method according to claim 1 or 2, wherein the vacuum degree of the sealed vacuum storage device is-65 Kpa to-99 Kpa.
4. The manufacturing method according to claim 3, wherein the vacuum degree of the sealed vacuum storage device is-65 Kpa to-85 Kpa.
5. The method of manufacturing according to claim 1 or 2, wherein the sealed vacuum storage device has a relative humidity of 25% RH to 34% RH.
6. The method of manufacturing according to claim 5, wherein the sealed vacuum storage device has a relative humidity of 30% RH to 34% RH.
7. The manufacturing method according to claim 1 or 2, wherein the degree of vacuum of the sealed vacuum storage device is-65 Kpa to-99 Kpa, and the relative humidity of the sealed vacuum storage device is 25% RH to 34% RH.
8. The manufacturing method according to claim 7, wherein the degree of vacuum of the sealed vacuum storage device is-65 Kpa to-85 Kpa, and the relative humidity of the sealed vacuum storage device is 30% RH to 34% RH.
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| US5980977A (en) * | 1996-12-09 | 1999-11-09 | Pinnacle Research Institute, Inc. | Method of producing high surface area metal oxynitrides as substrates in electrical energy storage |
| US9761347B2 (en) * | 2013-05-17 | 2017-09-12 | Kemet Electronics Corporation | Process to improve coverage and electrical performance of solid electrolytic capacitor |
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| JP2001284189A (en) * | 2000-03-30 | 2001-10-12 | Nippon Chemicon Corp | Solid electrolytic capacitor and its manufacturing method |
| CN101714466A (en) * | 2009-11-18 | 2010-05-26 | 凯迈嘉华（洛阳）新能源有限公司 | Preparation method of double electric layers supercapacitor |
| CN105115250A (en) * | 2015-07-27 | 2015-12-02 | 山东精工电子科技有限公司 | Rapid drying method for lithium ion battery cell |
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