WO2011145555A1 - 乾燥方法及び乾燥装置 - Google Patents
乾燥方法及び乾燥装置 Download PDFInfo
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- WO2011145555A1 WO2011145555A1 PCT/JP2011/061184 JP2011061184W WO2011145555A1 WO 2011145555 A1 WO2011145555 A1 WO 2011145555A1 JP 2011061184 W JP2011061184 W JP 2011061184W WO 2011145555 A1 WO2011145555 A1 WO 2011145555A1
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- drying
- atmospheric pressure
- drying chamber
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- predetermined
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/049—Processes for forming or storing electrodes in the battery container
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a drying method and a drying apparatus.
- dew point temperature -25 degrees or less
- the amount of water evaporated depends on the degree of decompression. If the decompression capability of the device reaches the limit, the decompression degree converges to a certain degree. At this time, the evaporation amount is also constant. If the decompression capability of the apparatus is low, the degree of decompression is small. Then the amount of evaporation is small. In such a case, the drying capacity is low. As a result, the drying time is not so shortened.
- the present invention has been made paying attention to such a conventional problem, and an object of the present invention is to provide a drying method and a drying apparatus capable of sufficiently shortening the drying time without becoming large. .
- the step of heating the object to be dried installed in the drying chamber to a predetermined temperature, the step of maintaining the predetermined temperature, and the atmospheric pressure in the drying chamber are higher than the atmospheric pressure.
- a drying method comprising a step of raising the pressure to a predetermined pressure and a step of lowering the pressure in the drying chamber from the predetermined pressure.
- a drying chamber in which an object to be dried is installed, and a temperature adjustment that is provided in the drying chamber, heats the object to be dried to a predetermined temperature, and then maintains the predetermined temperature.
- a drying apparatus includes a mechanism and a pressure adjusting mechanism that raises the atmospheric pressure in the drying chamber to a predetermined atmospheric pressure higher than the atmospheric pressure and then lowers the atmospheric pressure.
- FIG. 1 is a schematic view of a lithium ion secondary battery used in the first embodiment of the drying apparatus according to the present invention.
- FIG. 2 is a schematic configuration diagram showing a first embodiment of a drying apparatus according to the present invention.
- FIG. 3 is a time chart for explaining the operation of the drying apparatus according to the first embodiment.
- FIG. 4 is a diagram for explaining a mechanism that promotes the detachment of moisture during decompression.
- FIG. 5 is a diagram for explaining the effect of the first embodiment.
- FIG. 6 is a time chart for explaining the operation of the drying apparatus of the second embodiment.
- FIG. 1 is a schematic view of a lithium ion secondary battery used in the first embodiment of the drying apparatus according to the present invention.
- FIG. 1A is a perspective view of a lithium ion secondary battery.
- FIG. 1B is a cross-sectional view taken along the line BB of FIG.
- the lithium ion secondary battery 100 includes a plurality of unit batteries 110 and an exterior package 120.
- a predetermined number of unit batteries 110 are stacked and electrically connected in parallel.
- Each unit battery 110 includes a separator 111, a positive electrode 112, and a negative electrode 113.
- the separator 111 is an electrolyte layer.
- the positive electrode 112 has a thin plate positive electrode current collector 112a and positive electrode layers 112b formed on both surfaces thereof. Note that the positive electrode 112 disposed in the outermost layer has the positive electrode layer 112b only on one surface of the positive electrode current collector 112a. All the positive electrode current collectors 112a are gathered together and electrically connected in parallel. In FIG. 1B, all the positive electrode current collectors 112a are gathered together on the left side. This assembly portion is a positive electrode current collector.
- the negative electrode 113 has a thin negative electrode current collector 113a and negative electrode layers 113b formed on both surfaces thereof. Note that the negative electrode 113 disposed in the outermost layer includes the negative electrode layer 113b only on one surface of the negative electrode current collector 113a. All the negative electrode current collectors 113a are gathered together and electrically connected in parallel. In FIG. 1B, all the negative electrode current collectors 113a are gathered together on the right side. This aggregate portion is a negative electrode current collector.
- the exterior package 120 accommodates a plurality of unit batteries 110 that are stacked.
- the outer package 120 is formed of a sheet material of a polymer-metal composite laminate film.
- the polymer-metal composite laminate film is formed by coating a metal such as aluminum with an insulator such as a polypropylene film.
- the outer package 120 is heat-sealed at three sides in a state where the stacked unit cells 110 are accommodated. The remaining one side opens without being heat-sealed. This side is heat-sealed after the electrolyte is injected in a later step.
- the exterior package 120 includes a positive electrode tab 122 and a negative electrode tab 123.
- the positive electrode tab 122 and the negative electrode tab 123 are terminals for taking out the power of the unit battery 110 to the outside.
- One end of the positive electrode tab 122 is connected to the positive electrode current collector within the exterior package 120.
- the other end of the positive electrode tab 122 goes out of the outer package 120.
- One end of the negative electrode tab 123 is connected to the negative electrode current collector within the exterior package 120.
- the other end of the negative electrode tab 123 goes out of the exterior package 120.
- FIG. 2 is a schematic configuration diagram showing a first embodiment of a drying apparatus according to the present invention.
- the drying apparatus 1 includes a drying chamber 10, a temperature adjustment mechanism 20, and an atmospheric pressure adjustment mechanism 30.
- the drying chamber 10 is installed with objects to be dried.
- the object to be dried is the lithium ion secondary battery 100 shown in FIG.
- this lithium ion secondary battery 100 three sides are heat-sealed. The remaining one side opens without being heat-sealed.
- the internal pressure in the drying chamber 10 is detected by a pressure sensor 11.
- the temperature adjustment mechanism 20 is a heater provided in the drying chamber 10.
- the temperature adjustment mechanism 20 heats the lithium ion secondary battery 100 so that the lithium ion secondary battery 100 that is the object to be dried reaches a predetermined temperature. After that, the temperature adjustment mechanism 20 heats the lithium ion secondary battery 100 so as to maintain the predetermined temperature. Specifically, the temperature adjustment mechanism 20 heats the positive electrode tab 122 and the negative electrode tab 123. When the temperature adjustment mechanism 20 heats the positive electrode tab 122 and the negative electrode tab 123, the heat is transferred to the positive electrode 112 and the negative electrode 113 as shown by arrows in the figure. As the lithium ion secondary battery 100 dries, the amount of heat supplied by the temperature adjustment mechanism 20 decreases.
- the temperature adjustment mechanism 20 adjusts the heating amount according to the amount of residual moisture inside the battery.
- the predetermined temperature is preferably as high as possible within a range not exceeding the heat resistance temperature of the material having the lowest heat resistance temperature among the materials constituting the battery.
- the predetermined temperature may not be held at a constant value. That is, the temperature may be varied as long as the evaporation of residual moisture is not hindered.
- the atmospheric pressure adjustment mechanism 30 raises and lowers the atmospheric pressure in the drying chamber 10.
- the atmospheric pressure adjustment mechanism 30 includes a vacuum pump 31, a pressure adjustment tank 32, and a three-way valve 33.
- the vacuum pump 31 is connected to the drying chamber 10 via a three-way valve 33.
- the vacuum pump 31 sucks air in the drying chamber 10. As a result, the air pressure in the drying chamber 10 decreases.
- the pressure adjustment tank 32 is connected to the drying chamber 10 via a three-way valve 33.
- the pressure adjustment tank 32 stores compressed air.
- the pressure adjustment tank 32 supplies compressed air to the drying chamber 10. As a result, the air pressure in the drying chamber 10 increases.
- the three-way valve 33 switches the communication destination of the drying chamber 10 to the vacuum pump 31 or the pressure adjustment tank 32.
- FIG. 3 is a time chart for explaining the operation of the drying apparatus of the first embodiment.
- the temperature adjustment mechanism 20 is operated to heat the lithium ion secondary battery 100 installed in the drying chamber 10 to a target temperature (heating step # 101).
- the target temperature is preferably as high as possible within a range that does not exceed the heat resistance temperature of the material having the lowest heat resistance temperature among the materials constituting the battery.
- lithium ion secondary battery 100 is heated so that the temperature is maintained (maintenance step # 102).
- the atmospheric pressure adjusting mechanism 30 is operated, and the indoor atmospheric pressure in the drying chamber 10 is increased to a predetermined atmospheric pressure higher than the atmospheric pressure (increase step # 103).
- the three-way valve 33 is switched to allow the drying chamber 10 and the pressure adjustment tank 32 to communicate with each other.
- the compressed air stored in the pressure adjustment tank 32 is supplied to the drying chamber 10.
- the air pressure in the drying chamber 10 increases.
- the three-way valve 33 is switched to allow the drying chamber 10 and the vacuum pump 31 to communicate with each other. Then, the vacuum pump 31 sucks the air in the drying chamber 10. As a result, the air pressure in the drying chamber 10 decreases (Descent process # 104).
- the three-way valve 33 is switched again so that the drying chamber 10 and the pressure adjustment tank 32 are communicated with each other. As a result, the air pressure in the drying chamber 10 increases.
- FIG. 4A and 4B are diagrams for explaining a mechanism that promotes the release of moisture during decompression.
- FIG. 4A shows a normal pressure state
- FIG. 4B shows a pressurized state
- FIG. C shows a reduced pressure state.
- the contact angle of the water droplet in the normal pressure state is ⁇ 0 .
- the contact angle of the water droplet becomes ⁇ 1 smaller than ⁇ 0 as shown in FIG. 4B. That is, the atmospheric pressure acts to push the water droplets as shown by the solid arrow A1 and adhere to the material. In this state, the internal energy is accumulated as indicated by the dashed arrow B1.
- FIG. 5 is a diagram for explaining the effect of the first embodiment.
- the temperature adjustment mechanism 20 heated the lithium ion secondary battery 100 for a predetermined time while the pressure in the drying chamber was kept constant at a vacuum.
- the moisture reduction rate in this case was 8.8% for the positive electrode and 71.1% for the negative electrode.
- the moisture reduction rate at the same time was 14.8% for the positive electrode and 94.6% for the negative electrode.
- the positive electrode and the negative electrode are easier to dry than in the comparative embodiment in which the pressure is constant. That is, the drying time is shortened.
- the temperature adjustment mechanism 20 heats the lithium ion secondary battery 100 installed in the drying chamber 10 so as not to exceed the heat resistance temperature of the battery constituent material having the lowest heat resistance temperature.
- the temperature adjusting mechanism 20 heats the positive electrode tab 122 and the negative electrode tab 123, the inside of the exterior package is heated. Therefore, it can dry quickly.
- the atmospheric pressure adjusting mechanism 30 is lowered.
- the atmospheric pressure is higher than atmospheric pressure
- internal energy accumulates in the moisture.
- indoor pressure falls, the internal energy is released.
- moisture easily evaporates.
- the indoor pressure is lower than the atmospheric pressure
- the boiling point of water drops.
- the lower the room pressure is, the lower the boiling point.
- water tends to evaporate.
- the buoyancy of water adhering to the surface of the material is increased, and water detachment is promoted. Accordingly, the drying time is shortened.
- the amount of water evaporation depends on the degree of decompression.
- the pump capacity must be increased or the tank must be thickened.
- the apparatus becomes large and the cost increases.
- the limit of the decompression capability of the apparatus is reached, the decompression degree converges to a certain degree.
- the evaporation amount is also constant. If the decompression capacity of the apparatus is low and the degree of decompression is small, the amount of evaporation is small. In such a case, since the drying capacity is low, the drying time is not so shortened. In contrast, in the present embodiment, the degree of decompression need not be increased. Therefore, it can be realized without using a large-scale device.
- FIG. 6 is a time chart for explaining the operation of the drying apparatus of the second embodiment.
- the indoor pressure in the drying chamber 10 is increased so that the target pressure is reached when the lithium ion secondary battery 100 installed in the drying chamber 10 reaches the target temperature (rising step # 103).
- the lithium ion secondary battery 100 installed in the drying chamber 10 reaches the target temperature at time t1. At this timing, the atmospheric pressure in the drying chamber 10 becomes the target atmospheric pressure.
- the atmospheric pressure adjustment mechanism is not limited to that exemplified above.
- the air pressure may be increased by pressurizing with a pump.
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Abstract
Description
図1は、本発明による乾燥装置の第1実施形態に用いられるリチウムイオン二次電池の概略図である。図1(A)はリチウムイオン二次電池の斜視図である。図1(B)は図1(A)のB-B断面図である。
乾燥装置1は、乾燥室10と、温度調整機構20と、気圧調整機構30と、を含む。
これに対して本実施形態では、減圧度合いを大きくしなくてもよい。したがって、大がかりな装置でなくても実現できる。
図6は、第2実施形態の乾燥装置の作動を説明するタイムチャートである。
Claims (6)
- 乾燥室(10)内に設置された乾燥対象物(100)を加熱して所定温度にする工程(#101)と、
前記所定温度を維持する工程(#102)と、
前記乾燥室(10)内の気圧を、大気圧よりも高い所定気圧まで上昇させる工程(#103)と、
前記乾燥室(10)内の気圧を、前記所定気圧から下降させる工程(#104)と、
を有する乾燥方法。 - 請求項1に記載の乾燥方法において、
前記乾燥室(10)内の気圧を上昇させる工程(#103)は、前記乾燥対象物(100)が所定温度に達するときに、前記乾燥室(10)内の気圧を前記所定気圧にする、
ことを特徴とする乾燥方法。 - 請求項1に記載の乾燥方法において、
前記乾燥室(10)内の気圧を上昇させる工程(#103)は、前記乾燥対象物(100)が所定温度に維持されているときに、前記所定気圧になるように前記乾燥室(10)内の気圧を上昇させる、
ことを特徴とする乾燥方法。 - 乾燥対象物(100)を設置する乾燥室(10)と、
前記乾燥室(10)内に設けられ、前記乾燥対象物(100)を加熱して、所定温度にし、その後、その所定温度を維持する温度調整機構(20)と、
前記乾燥室(10)内の気圧を、大気圧よりも高い所定気圧まで上昇させて、その後、下降させる気圧調整機構(30)と、
を有する乾燥装置。 - 請求項4に記載の乾燥装置において、
前記乾燥対象物(100)は、外装材(120)と、その外装材(120)の内部に設けられる電極(112,113)と、を含む発電要素である、
ことを特徴とする乾燥装置。 - 請求項5に記載の乾燥装置において、
前記温度調整機構(20)は、一端が前記外装材(120)の内部で前記電極(112,113)に接続されるとともに他端が前記外装材(120)の外に出る端子(122,123)を加熱する、
ことを特徴とする乾燥装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127032691A KR20130007669A (ko) | 2010-05-17 | 2011-05-16 | 건조 방법 및 건조 장치 |
EP11783489.5A EP2573493B1 (en) | 2010-05-17 | 2011-05-16 | Drying method, and drying device |
US13/698,515 US10177416B2 (en) | 2010-05-17 | 2011-05-16 | Drying method and drying apparatus |
CN201180024538.0A CN102906519B (zh) | 2010-05-17 | 2011-05-16 | 干燥方法和干燥装置 |
Applications Claiming Priority (2)
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JP2010-112935 | 2010-05-17 | ||
JP2010112935A JP5742114B2 (ja) | 2010-05-17 | 2010-05-17 | 乾燥方法及び乾燥装置 |
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WO2011145555A1 true WO2011145555A1 (ja) | 2011-11-24 |
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US (1) | US10177416B2 (ja) |
EP (1) | EP2573493B1 (ja) |
JP (1) | JP5742114B2 (ja) |
KR (1) | KR20130007669A (ja) |
CN (2) | CN104482724B (ja) |
WO (1) | WO2011145555A1 (ja) |
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WO2013116599A1 (en) | 2012-02-01 | 2013-08-08 | Revive Electronics, LLC | Methods and apparatuses for drying electronic devices |
CN103310805A (zh) * | 2012-03-13 | 2013-09-18 | 东莞新科技术研究开发有限公司 | 固化处理装置 |
CN103310803A (zh) * | 2012-03-13 | 2013-09-18 | 东莞新科技术研究开发有限公司 | 固化处理方法 |
US9513053B2 (en) | 2013-03-14 | 2016-12-06 | Revive Electronics, LLC | Methods and apparatuses for drying electronic devices |
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- 2011-05-16 WO PCT/JP2011/061184 patent/WO2011145555A1/ja active Application Filing
- 2011-05-16 EP EP11783489.5A patent/EP2573493B1/en active Active
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US9709327B2 (en) | 2011-03-17 | 2017-07-18 | Dry Ventures, Inc. | Rapid rescue of inundated cellphones |
US10690413B2 (en) | 2012-02-01 | 2020-06-23 | Revive Electronics, LLC | Methods and apparatuses for drying electronic devices |
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WO2013116599A1 (en) | 2012-02-01 | 2013-08-08 | Revive Electronics, LLC | Methods and apparatuses for drying electronic devices |
CN103310803A (zh) * | 2012-03-13 | 2013-09-18 | 东莞新科技术研究开发有限公司 | 固化处理方法 |
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US9513053B2 (en) | 2013-03-14 | 2016-12-06 | Revive Electronics, LLC | Methods and apparatuses for drying electronic devices |
US10651643B2 (en) | 2013-07-10 | 2020-05-12 | Revive Electronics, LLC | Apparatuses and methods for controlling power to electronic devices |
CN107356053A (zh) * | 2017-07-20 | 2017-11-17 | 深圳市鑫承诺环保产业股份有限公司 | 新能源电池超燥工艺 |
Also Published As
Publication number | Publication date |
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KR20130007669A (ko) | 2013-01-18 |
CN104482724A (zh) | 2015-04-01 |
JP5742114B2 (ja) | 2015-07-01 |
CN102906519B (zh) | 2015-09-16 |
JP2011242021A (ja) | 2011-12-01 |
US20130055585A1 (en) | 2013-03-07 |
EP2573493A1 (en) | 2013-03-27 |
CN104482724B (zh) | 2016-08-24 |
EP2573493A4 (en) | 2016-12-07 |
US10177416B2 (en) | 2019-01-08 |
EP2573493B1 (en) | 2020-04-29 |
CN102906519A (zh) | 2013-01-30 |
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