WO2009136660A1 - 電気化学デバイスおよびその実装構造 - Google Patents
電気化学デバイスおよびその実装構造 Download PDFInfo
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- WO2009136660A1 WO2009136660A1 PCT/JP2009/058958 JP2009058958W WO2009136660A1 WO 2009136660 A1 WO2009136660 A1 WO 2009136660A1 JP 2009058958 W JP2009058958 W JP 2009058958W WO 2009136660 A1 WO2009136660 A1 WO 2009136660A1
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- Prior art keywords
- package
- electrochemical device
- electric double
- insulating material
- heat insulating
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- 239000011810 insulating material Substances 0.000 claims abstract description 44
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Classifications
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
- H01G11/12—Stacked hybrid or EDL capacitors
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- H01G11/78—Cases; Housings; Encapsulations; Mountings
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- H01G11/74—Terminals, e.g. extensions of current collectors
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- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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- 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
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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
- 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
- Y02E60/13—Energy storage using capacitors
-
- 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 an electrochemical device having a structure in which at least one pair of terminals is led out from a package enclosing a power storage element, and an electrochemical device mounting structure formed by mounting the electrochemical device on a circuit board.
- Some electrochemical devices for example, electric double layer capacitors, lithium ion capacitors, redox capacitors, lithium ion batteries, etc., have a structure in which at least one pair of terminals is derived from a package enclosing a storage element.
- the electric double layer capacitor corresponding to the above includes an electricity storage element configured by sequentially stacking a positive electrode side electrode and a negative electrode side electrode via a separator, and a positive electrode electrically connected to the positive electrode side electrode of the electricity storage element
- One end side of the terminal, one end side of the negative electrode terminal electrically connected to the negative electrode of the storage element, and an electrolyte are sealed in a package, and the other end of the positive electrode terminal is sealed. It has a structure in which the end side and the other end side of the negative electrode terminal are led out from the package.
- a laminate film having a protective layer made of plastic, a barrier layer made of metal, and a heat seal layer made of plastic in order is used for the package, and the package is made of, for example, one rectangular film of a predetermined size. It is formed by bending and stacking, and then heat sealing and sealing the three sides (the part where the heat seal layers overlap).
- the electrochemical device is mounted on a substrate or the like by high-temperature reflow soldering using lead-free solder in the same manner as general electronic components. It is desired to be able to implement it. In other words, there is a growing demand for electrochemical devices that can handle high-temperature reflow soldering using lead-free solder.
- the temperature inside the reflow furnace used for reflow soldering using lead-free solder reaches a maximum of around 2500 ° C, for example.
- the electrical storage element in the package may be thermally deteriorated, resulting in problems such as a significant decrease in the electrical characteristics of the electrochemical device itself.
- Patent Document 1 discloses a structure in which an electrochemical device is housed in a case. Since the case does not actively suppress heat conduction to the package, the same problem as described above can occur.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2 0 0 0-2 8 6 1 7 1 Disclosure of Invention
- An object of the present invention is to provide an electrochemical device capable of supporting high-temperature reflow soldering using lead-free solder, and an electrochemical device mounting structure formed by mounting the electrochemical device on a circuit board. There is. Means for solving the problem
- the present invention provides an electrochemical device that is mounted and used by soldering, a package, a power storage element enclosed in the package, and one end electrically connected to the power storage element. And the other end side covers at least one pair of terminals led out from the package, the whole package and the base end part of the lead-out portion of the terminals, and conducts heat conduction from the outside to the package. And a heat conduction suppressing means for suppressing.
- an electrochemical device capable of supporting high-temperature reflow soldering using lead-free solder and an electrochemical device mounting structure in which the electrochemical device is mounted on a circuit board.
- FIG. 1 is a top view of an electric double layer capacitor showing a first embodiment in which the present invention is applied to an electric double layer capacitor.
- FIG. 2 is a longitudinal sectional view taken along line a 1 -a 1 in FIG. It is.
- FIG. 3 is a longitudinal sectional view taken along line a2-a2 in FIG.
- FIG. 4 is a detailed view of part A in FIG.
- FIG. 5 is a diagram showing an implementation structure in which the electric double layer capacitor shown in FIGS. 1 to 4 is mounted on a circuit board.
- FIG. 6 is a top view of an electric double layer capacitor showing a second embodiment in which the present invention is applied to the electric double layer capacitor.
- Fig. 7 shows a longitudinal section along the line b l- b l in Fig. 6.
- FIG. 8 is a longitudinal sectional view taken along line b2-b2 of FIG.
- FIG. 9 is a diagram showing an implementation structure in which the electric double layer capacitor shown in FIGS. 6 to 8 is mounted on a circuit board.
- FIG. 10 is a top view of an electric double layer capacitor showing a third embodiment in which the present invention is applied to the electric double layer capacitor.
- FIG. 11 is a longitudinal sectional view taken along line c 1 -c 1 in FIG.
- FIG. 12 is a longitudinal sectional view taken along line c 2 -c 2 in FIG.
- FIG. 13 is a view showing a mounting structure in which the electric double layer capacitor shown in FIGS. 10 to 12 is mounted on a circuit board.
- FIG. 14 is a top view of an electric double layer capacitor showing a fourth embodiment in which the present invention is applied to the electric double layer capacitor.
- FIG. 15 is a longitudinal sectional view taken along line d 1 _d 1 in FIG.
- FIG. 16 is a longitudinal sectional view taken along line d2-d2 of FIG.
- FIG. 17 is a view showing a mounting structure in which the electric double layer capacitor shown in FIGS. 14 to 16 is mounted on a circuit board.
- FIG. 18 is a top view of an electric double layer capacitor showing a fifth embodiment in which the present invention is applied to the electric double layer capacitor.
- FIG. 19 is a longitudinal sectional view taken along line e 1 _e 1 of FIG.
- FIG. 20 is a longitudinal sectional view taken along line e 2 -e 2 of FIG.
- FIG. 21 is a view showing a mounting structure in which the electric double layer capacitor shown in FIGS. 18 to 20 is mounted on a circuit board. Explanation of symbols
- FIG. 1 to 5 show a first embodiment in which the present invention is applied to an electric double layer capacitor.
- Fig. 1 is a top view of the electric double layer capacitor
- Fig. 2 is a vertical cross-sectional view taken along line a 1-a 1 in Fig. 1
- Fig. 3 is a vertical cross-sectional view taken along line a 2-a 2 in Fig. 1
- Fig. 4 is 2 is a detailed view of part A
- FIG. 5 is a view showing a mounting structure in which the electric double layer capacitor shown in FIGS. 1 to 4 is mounted on a circuit board.
- the electric double layer capacitor 10-1 of the first embodiment includes a power storage element 11, a pair of terminals (a positive terminal 12 and a negative terminal 13), a package 14, an electrolyte 15 and a heat insulation. And a material layer 16.
- the electricity storage element 11 is configured by alternately stacking positive electrode (no symbol) and negative electrode (no symbol) via a separator 11 e.
- the positive electrode is composed of a polarizable electrode for positive electrode 1 1 a and a current collector for positive electrode 1 1 b superimposed on the polarizable electrode for positive electrode 1 1 a.
- the negative electrode (no symbol) is composed of a negative polarizable electrode 1 1 c and a negative current collector 1 1 1 d superimposed on the negative polarizable electrode 1 1 c.
- connection pieces 1 1 b 1 (not shown) are provided at the ends of the positive electrode current collectors 11, respectively.
- a connecting piece 1 1 d 1 is provided at the end of each negative electrode current collector 11 1 d.
- FIG. 2 includes a positive electrode, a negative electrode, and a separator lie. Although a configuration in which three units are substantially stacked is shown, the number of units to be configured may be four or more, or one.
- current collectors 1 1 b and 1 1 d are shown in the uppermost layer and lowermost layer of power storage element 11, respectively.
- a polarizable electrode may be provided with a separator.
- the positive electrode terminal 12 and the negative electrode terminal 13 are formed in a strip shape from a metal such as aluminum. One end of the positive electrode terminal 12 is electrically connected to the connection piece 1 1 b 1 of the electric storage element 11. Further, one end of the negative electrode terminal 13 is electrically connected to the connection piece 1 1 b 1 of the power storage element 11.
- the package 14 is formed of a film having a heat seal layer on at least one side. As can be seen from FIG. 2, one end side of the storage element 1 1 and the positive electrode terminal 1 2, one end side of the negative electrode terminal 1 3, and the electrolyte solution 15 are enclosed in the package 14. The other end side of the terminal 12 and the other end side of the negative terminal 13 are led out from the package 14. Regarding the sealing of the electrolytic solution 15, in addition to the method in which the storage element 11 is pre-impregnated with the electrolytic solution 15 before forming the package 14, the holes previously formed in the package 14 are formed after the package 14 is formed. For example, a method of filling the inside with electrolyte 15 and closing the hole can be employed.
- the film for forming the package 14 includes a laminate film shown in FIG. 4, for example, a protective layer L 1 made of a plastic such as nylon, and a metal oxide such as aluminum or a metal oxide such as A 1 2 0 3.
- a laminated film having an insulating layer L 3 made of plastic such as polyethylene terephthalate, a heat seal layer L 4 made of plastic such as polypropylene, and the like can be preferably used.
- the barrier layer L 2 in this laminate film serves to prevent leakage of the electrolyte solution 15 from the package 14 and to prevent moisture from entering the package 14.
- the insulating layer L 3 serves to prevent the barrier layer L 2 from contacting the power storage element 11 even when the heat sealing layer L 4 is melted by heat sealing.
- the film for forming the package 14 a laminate film and a non-laminate film in which at least one of the protective layer L 1, the barrier layer L 2, and the insulating layer L 3 is excluded from the laminate film shown in FIG. It is also possible.
- (E l 1) One rectangular film of a predetermined size is folded and overlapped, and then the three sides (the heat seal layers overlap) (Refer to Fig.1 and Fig.1 heat-sealing part 14a), (E1 2) After overlapping two rectangular films of a predetermined size 4 sides (heat seal layer overlaps
- the method of heat sealing and sealing, etc. can be preferably employed.
- the heat insulating material layer 16 has a thermal conductivity lower than that of the package 14 and is directly exposed to the furnace atmosphere of the reflow furnace during reflow soldering to a predetermined temperature (for example, 25 ° C.). It is made of a heat-resistant material that does not change in quality even when heated before and after. As can be seen from FIG. 2, the heat insulating material layer 16 covers the entire package 14 and the base end portion of the lead-out portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3, and the positive electrode terminal 1 2 and the negative electrode terminal 1 The tip of 3 protrudes from the heat insulating material layer 16 to the outside.
- a predetermined temperature for example, 25 ° C.
- Examples of the material for forming the heat insulating material layer 16 include (E 2 1) porous glass such as silica airgel, Vycor glass and fumed silica, (E 2 2) porous alumina such as anodized type and powder cement paste. (E 2 3) Graphite foam, (E 2 4) Porous plastics such as porous fluororesin and foamed polyimide, etc. can be preferably used. These materials are basically porous materials in which a large number of vacancies are contained in a connected state, but a large number of vacancies are contained in a non-communication state as long as they have the heat insulation and heat resistance described above. It is also possible to use a porous material. .
- a method of forming the heat insulating material layer 16 so as to cover the entire package 14 and the base end portion of the lead-out portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3 is, for example, (E 3 1) Using a mold with a cavity (not shown), insert the package 14 so that the tip of the lead-out part of the positive terminal 1 2 and the negative terminal 1 3 protrudes into the cavity, and then insert a fluid material into the cavity. Then, this can be cured, and a method of taking it out of the mold after curing can be preferably employed.
- E 3 2 A method in which a sheet material is wound around the surface of the package 14 using a material that has been processed into a sheet material in advance, and then the brazing edge is joined with an adhesive material, etc.
- E 3 3) A method of winding a sheet material around the surface of the package 14 using a material that has been processed into a sheet material in advance and pasting it with an adhesive can be preferably employed.
- the thickness of the heat insulating material layer 16 does not increase the size of the electric double layer capacitor 10.
- the thickness of the heat insulating material layer 16 can be mounted on a circuit board or the like like a general electronic component. In order to stop, it is preferable to make it as thin as possible.
- the thickness t of the heat insulating material layer 16 will be described with a specific example.
- the space in the package where the electricity storage element is built is in contact with the laminate film, for example, the length is 3 O mm X width 17 mm X 2 and the thickness of the laminate film Is 0.3 mm.
- the two terminals derived from the package 14 are, for example, 0.3 mm thick, 5. O mm wide, and 5. O mm long, respectively. In the following calculation, it is assumed that a temperature difference of 2600 ° C has occurred inside and outside the package 14.
- a conventional electric double layer capacitor without insulation 16 is used with lead-free solder.
- the amount of heat flowing into the package through the package is 266 W
- the amount of heat flowing into the package through the positive terminal and the negative terminal is 38 W.
- the amount of heat flowing into the former is about the same as the amount of heat flowing into the latter.
- the thermal conductivity of the heat insulating material layer 16 of the electric double layer capacitor 10-1 is / C p (W / mK), the volume porosity is P, and a general non-porous heat insulating material If the thermal conductivity of is K b (W ⁇ ⁇ K), the following equation holds: / cp ⁇ b ⁇ (1 ⁇ ).
- Thickness which indicates the thermal conductivity of a general non-porous heat insulating material / cb is about 0.1.
- the numerical value 4.78 X 1 0_ 3 in this relational expression is the relationship between the amount of heat flowing into the package through the package (266W) and the amount of heat flowing into the package through the positive and negative terminals (38W). It is a numerical value calculated from
- the thickness of the heat insulating material layer 16 is, for example, 0.
- a material having a volume porosity p larger than 0.859 may be used as the heat insulating material layer 16.
- the tip portions of the positive electrode terminal 12 and the negative electrode terminal 13 protruding from the heat insulating material layer 16 correspond to each.
- the solder paste (SO) is disposed on each land LA of the circuit board SU, and the heat insulating material layer 16 is disposed on the circuit board SU.
- Figure 5 shows that the bottom surface height of the tip of positive electrode terminal 1 2 and negative electrode terminal 1 3 is almost equal to the top surface height of each land LA with insulation layer 16 placed on circuit board SU. However, if the heights of the two do not match, the heights of the positive terminal 12 and the negative terminal 13 are adjusted by bending them appropriately before placement.
- solder SO solder
- Insulation layer 16 is directly exposed to the atmosphere in the reflow furnace during the passage through the reflow furnace. However, the heat conduction to the package 14 is suppressed by the heat insulating action of the heat insulating material layer 16 covering the entire package 14, and as a result, it is heated to a predetermined temperature (for example, around 2500 ° C). In addition, the amount of heat flowing into the inside through the package 14 is reduced. Further, since the heat insulating material layer 16 also covers the base end portion of the lead-out portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3, the amount of heat flowing into the package 14 through the positive electrode terminal 1 2 and the negative electrode terminal 1 3 is also reduced. Somewhat reduced.
- the portion of the insulating material 16 in contact with the circuit board SU is brought into the furnace atmosphere of the reflow furnace. Since it is not directly exposed, the amount of heat conducted from the lower surface side of the insulating material 16 to the package 14 can be effectively suppressed.
- the electric double layer capacitor 10-1 capable of supporting high-temperature reflow soldering using lead-free solder, and the electric double layer capacitor 10-1 can be provided in the same manner as general electronic components. It is possible to reliably answer the demand for mounting on a substrate by high-temperature reflow soldering using lead-free solder.
- FIG. 6 to 9 show a second embodiment in which the present invention is applied to an electric double layer capacitor.
- 6 is a top view of the electric double layer capacitor
- FIG. 7 is a longitudinal sectional view taken along line bl-b 1 in FIG. 6
- FIG. 8 is a longitudinal sectional view taken along line b 2 _b 2 in FIG. 6
- FIG. 9 is a diagram showing a mounting structure formed by mounting the electric double layer capacitor shown in FIGS. 6 to 8 on a circuit board.
- Electric double layer capacitor of the second embodiment 10 -2 force The difference between the electric double layer capacitor 1 0 -1 of the first embodiment is that the heat insulating material layer 16 is entirely covered with a force per sheet 17. In the point.
- Other configurations are the same as those of the electric double layer capacitor 10-1 of the first embodiment, and therefore, the same reference numerals are used and description thereof is omitted.
- the cover sheet 17 is made of a heat-resistant sheet material that does not change in quality even if it is directly exposed to the atmosphere in the reflow furnace during reflow soldering and heated to a predetermined temperature (for example, around 25 ° C.). Is formed. As can be seen from FIG. 7, the cover sheet 17 covers the entire heat insulating material layer 1 6 and the base end portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3 protruding from the heat insulating material layer 1 6, The tip portions of the positive electrode terminal 1 2 and the negative electrode terminal 1 3 protrude from the cover sheet 17 to the outside.
- a predetermined temperature for example, around 25 ° C.
- Examples of the sheet material forming the cover sheet 17 include (E 4 1) a sheet material made of plastic such as fluorine resin, and (E 4 2) a layer made of plastic such as fluorine resin and an adhesive material.
- a sheet material having an adhesive layer in order can be preferably used.
- the method of forming the cover sheet 17 from the sheet material (E41) described above is, for example, (E 5 1) Two rectangular sheet materials of a predetermined size are overlapped, and then the four sides thereof are coated with an adhesive material. (E 52) Folding and stacking one rectangular sheet of the specified size and then joining the three sides via adhesive , Etc. can be preferably employed.
- the cover sheet 17 can be formed from the sheet material (E42) by, for example, (E 53) two rectangular sheet materials of a predetermined size being overlapped to insulate via the adhesive layer (adhesive material). Attaching to the surface of the material layer 16 and joining the four sides (the part where the adhesive layers overlap) (see Fig. 6 and the joint 17a), (E54) One rectangular sheet of the prescribed size A method in which the materials are folded and overlapped and attached to the surface of the heat insulating material layer 16 through an adhesive layer (adhesive material), and the three sides (portions where the adhesive layers overlap) is joined can be preferably employed.
- the force per sheet i 7 is particularly advantageous when the methods (E 32) and (E 33) are adopted among the methods of forming the heat insulating material layer 16 described in the first embodiment. That is, when a sheet material is used as in the methods (E 32) and (E 33) described above, the sheet material can be pressed by the cover sheet 17. In the forming method, the work of joining the winding ends of the sheet material with an adhesive or the like can be omitted, and in the method of (E 33), the sheet material is packaged. It is possible to omit the work of attaching to the surface of the die 14 with an adhesive.
- the cover sheet 17 is formed by the formation method of the above (E 5 1) and (E 52), that is, the force par sheet 17 is attached to the surface of the heat insulating material layer 16 via the adhesive material. If not, the gap between the force par sheet 17 and the heat insulating material layer 16 becomes an air layer capable of exerting a heat insulating action, so that the heat insulating action by the air layer and the heat insulating action by the heat insulating material layer 16 are In combination, the heat conduction to the package 14 can be more effectively suppressed.
- the cover sheet 17 has an advantage that the product number and the like can be easily printed on the surface. That is, even when the heat insulating material layer 16 having surface irregularities that are not suitable for printing is used, the desired printing can be performed on the cover sheet 17 by using the force par sheet 17.
- FIG. 10 to 13 show a third embodiment in which the present invention is applied to an electric double layer capacitor.
- Fig. 10 is a top view of the electric double layer capacitor
- Fig. 11 is a longitudinal sectional view taken along line cl_c1 in Fig. 10
- Fig. 12 is a longitudinal sectional view taken along line c2_c2 in Fig. 10
- Fig. 1 3 is Fig. 10
- Fig. 12 is a view showing a mounting structure in which the electric double layer capacitor shown in FIG. 2 is mounted on a circuit board.
- Electric Double Layer Capacitor 10-3 of the Third Embodiment This embodiment is different from the electric double layer capacitor 10-2 of the second embodiment in that an air vent hole 17b is formed in the cover sheet 10. It is in. Since other configurations are the same as those of the electric double layer capacitor 10 -2 of the second embodiment, the description thereof is omitted by using the same reference numerals.
- the air vent hole 17 b is for communicating the outside and inside of the cover sheet 17.
- two air vent holes 17 b that form a circle are shown in the center of the upper surface of the cover sheet 17, but the shape of the air vent holes 17 b may be other than circular.
- the number of air vent holes 17 b may be one or three or more, and the air vent holes 17 b are formed at positions away from the center of the upper surface of the cover sheet 17 or the upper surface. Other positions may be used.
- the air vent hole 1 7 b is effective when the air in the cover sheet 17 is thermally expanded due to heat during reflow soldering and the cover sheet 17 is expanded. That is, if the cover sheet 17 swells during reflow soldering, the double layer capacitor 10 -3 will be displaced due to the swell, or the leading ends of the positive terminal 12 and the negative terminal 13 will be separated from the land LA. Problems such as floating may occur, but if the air vent hole 17 b is formed, bulging can be avoided by discharging air from the air vent hole 17 b, and the occurrence of the problem can be prevented. Further, it is possible to prevent the cover sheet 17 from being deformed due to contraction of the air in the cover sheet 17 during cooling.
- FIGS. 14 to 17 show a fourth embodiment in which the present invention is applied to an electric double layer capacitor.
- Fig. 14 is a top view of the electric double layer capacitor
- Fig. 15 is a longitudinal sectional view taken along line d 1 _ d 1 in Fig. 14
- Fig. 16 is a longitudinal section taken along line d 2-d 2 in Fig. 14.
- FIG. 17 is a diagram showing a mounting structure in which the electric double layer capacitor shown in FIGS. 14 to 16 is mounted on a circuit board.
- the electric double layer capacitor 10 0-3 of the third embodiment differs from the electric double layer capacitor 10 0-3 in that the heat insulating material is between the heat insulating material layer 16 and the package 14.
- the deformation suppression material 18 is interposed so as to be covered with the layer 16. Since other configurations are the same as those of the electric double layer capacitor 10-3 of the third embodiment, the same reference numerals are used and description thereof is omitted.
- the deformation suppressing material 18 is made of a material having higher rigidity than the package 14. As can be seen from FIG. 15, the deformation suppressing material 1 8 covers the entire package 14 and the base end portion of the lead-out portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3. The surface of the die 14 is in close contact with the surface of the base end portion of the lead-out portion of the positive terminal 12 and the negative terminal 13.
- (E 7 1) a rectangular parallelepiped shape is used as a method of forming the deformation suppressing material 18 so as to cover the entire package 14 and the base end portion of the lead-out portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3. After inserting the package 14 so that the leading ends of the lead-out portions of the positive electrode terminal 1 2 and the negative electrode terminal 1 3 protrude into the cavity using a mold (not shown) having the following cavity, a fluid material is inserted into the cavity.
- (E 7 2) A package formed by dividing the block 14 formed in advance so as to have a concave portion that matches the outer shape of the package 14 on the inner surface. A method of joining each other with a gap between them can be preferably employed.
- Deformation suppression material 1 8 suppresses thermal expansion and deformation of package 14 when heat during reflow soldering is conducted to package 1 4 through cover sheet 17, insulation layer 1 6 and deformation suppression material 1 8. Demonstrate the effect. That is, when heat during reflow soldering is conducted to package 14, electrolyte solution 15 leaks or package 14 is damaged due to thermal expansion and deformation that occurs in package 14. Even in the case where the above problem can occur, the thermal expansion and deformation can be suppressed by the deformation suppressing material 18 to reliably prevent the problem.
- FIG. 18 to FIG. 21 show a fifth embodiment in which the present invention is applied to an electric double layer capacitor.
- Fig. 18 is a top view of the electric double layer capacitor
- Fig. 19 is a vertical cross-sectional view along the el 2 e 1 line of Fig. 18, and
- Fig. 20 is a vertical cross-section along the e 2-e 2 line of Fig. 18
- FIG. 20 is a diagram showing a mounting structure in which the electric double layer capacitor shown in FIGS. 18 to 20 is mounted on a circuit board.
- the electric double layer capacitor 10-5 of the fifth embodiment is different from the electric double layer capacitor 10-1 of the first embodiment in that the heat insulating material layer 16 is excluded and the package 14 The entire structure is covered with a cover sheet 19, and a hair layer 20 is provided between the cover sheet 19 and the package 14. Since the other configuration is the same as that of the electric double layer capacitor 10 0-1 of the first embodiment, the description thereof is omitted by using the same reference numerals.
- the cover sheet 19 is made of a heat-resistant sheet material that does not change in quality even if it is directly exposed to the atmosphere of the reflow furnace during reflow soldering and heated to a predetermined temperature (for example, around 25 ° C.). Is formed. As can be seen from FIG. 19, the cover sheet 19 covers the entire package 14 and the base end portion of the lead-out portion of the positive terminal 1 2 and the negative terminal 1 3, and the cover sheet 19 and the package 14 There is an air layer 20 between them, and the front ends of the positive electrode terminal 12 and the negative electrode terminal 13 protrude from the cover sheet 19 to the outside.
- the sheet material for forming the cover sheet 19 for example, (E 8 1) a sheet material made of a plastic such as a fluorine resin can be preferably used.
- the method of forming the force par sheet 19 from the sheet material of (E 8 1) is, for example, (E 9 1) two rectangular sheet materials of a predetermined size are overlapped and then the four sides are adhered. (See Fig. 18 and joint 19a), (E 9 2) Fold and stack one rectangular sheet of the specified size, and then attach the three sides with an adhesive.
- the method of joining, etc. can be preferably employed.
- Examples of the method of forming the air layer 20 include: (E 1 0 1) a method in which air is actively introduced inside the force par sheet 19, and (E 1 0 2) cover sheet-1 Before forming 9 9 Cover sheet 1 9 Place a suitable number of rod-shaped spacers, spherical spacers, etc. for air layer formation on the surface of the package 14 and surround the rod-shaped spacers, spherical spacers, etc.
- the method of forming can be preferably employed.
- the air layer 20 exhibits the same heat insulating effect as the heat insulating material layer 16. That is, during reflow soldering, the cover sheet 19 is directly exposed to the atmosphere in the reflow furnace in the process of passing through the reflow furnace, and is heated to a predetermined temperature (for example, around 2500 ° C.). The heat conduction to the package 14 is suppressed by the heat insulating action of the air layer 20 covering the entire 14, and as a result, the amount of heat flowing into the package 14 is reduced. Further, since the air layer 20 also covers the base end portion of the lead-out portion of the positive electrode terminal 1 2 and the negative electrode terminal 1 3, the amount of heat flowing into the package 14 through the positive electrode terminal 1 2 and the negative electrode terminal 1 3 is also small. Reduced.
- thermo conduction suppressing means As an element for suppressing heat conduction from the outside to the package 14 (heat conduction suppressing means), a heat insulating material layer 16 covering the entire package 14 (first to The fourth embodiment) and the air layer 20 (the fifth embodiment) covering the entire package 14 have been shown. However, if the heat insulation function is the same as these elements, the heat insulation layer 1 6 It is also possible to use the air layer 20 instead.
- the electric double layer capacitors 10 -1 to 1 0 -5 are of the type referred to as the multilayer type, but are referred to as the button type and the wound type. Even if the present invention is applied to an electric double layer capacitor of the same type, the same effect can be obtained.
- the electric double layer capacitors 10-1 to 10-5 are applied to the present invention, but other electrochemical devices having similar packages, examples For example, even if a lithium ion capacitor is a redox capacitor, a lithium ion battery or the like, the same effect can be obtained by applying the present invention.
- thermo conduction suppressing means As an element for suppressing heat conduction from the outside to the package 14 (heat conduction suppressing means), a heat insulating material layer 16 covering the entire package 14 (first to The fourth embodiment) and the air layer 20 (the fifth embodiment) covering the entire package 14 have been shown. However, if the heat insulation function is the same as these elements, the heat insulation layer 1 6 It is also possible to use the air layer 20 instead.
- the electric double layer capacitors 10-1 to 10-5 are of the type referred to as the multilayer type, but are referred to as the potan type winding type. Even if the present invention is applied to an electric double layer capacitor of the same type, the same effect can be obtained.
- the electric double layer capacitors 10 -1 to 10 -5 are applied to the present invention, but other electrochemical devices having similar packages, such as examples For example, even if a lithium ion capacitor is a redox capacitor, a lithium ion battery or the like, the same effect can be obtained by applying the present invention.
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
Description
Claims
Priority Applications (4)
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KR1020107023433A KR101146295B1 (ko) | 2008-05-08 | 2009-05-07 | 전기화학 디바이스 및 그 실장 구조 |
US12/990,633 US8765277B2 (en) | 2008-05-08 | 2009-05-07 | Electrochemical device and packaging structure thereof |
JP2010511094A JP5320391B2 (ja) | 2008-05-08 | 2009-05-07 | 電気化学デバイスおよびその実装構造 |
CN2009801217287A CN102057456A (zh) | 2008-05-08 | 2009-05-07 | 电化学器件及其安装结构 |
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US (1) | US8765277B2 (ja) |
JP (2) | JP5320391B2 (ja) |
KR (1) | KR101146295B1 (ja) |
CN (2) | CN103490025A (ja) |
WO (1) | WO2009136660A1 (ja) |
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- 2009-05-07 KR KR1020107023433A patent/KR101146295B1/ko active IP Right Grant
- 2009-05-07 WO PCT/JP2009/058958 patent/WO2009136660A1/ja active Application Filing
- 2009-05-07 JP JP2010511094A patent/JP5320391B2/ja not_active Expired - Fee Related
- 2009-05-07 CN CN201310430278.8A patent/CN103490025A/zh active Pending
- 2009-05-07 US US12/990,633 patent/US8765277B2/en not_active Expired - Fee Related
- 2009-05-07 CN CN2009801217287A patent/CN102057456A/zh active Pending
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2013
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JPH10172866A (ja) * | 1996-12-09 | 1998-06-26 | Nec Corp | 電気二重層コンデンサ |
JP2000182579A (ja) * | 1998-12-16 | 2000-06-30 | Toshiba Battery Co Ltd | 板状ポリマー電解質電池 |
JP2000200587A (ja) * | 1999-01-04 | 2000-07-18 | Mitsubishi Electric Corp | 電池及びその製造方法 |
JP2000286171A (ja) * | 1999-03-30 | 2000-10-13 | Tokin Ceramics Corp | 電気二重層コンデンサ |
JP2005353894A (ja) * | 2004-06-11 | 2005-12-22 | Hitachi Aic Inc | ケース入りコンデンサ |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010028434A1 (en) * | 2008-09-09 | 2010-03-18 | Cap-Xx Limited | A package for an electrical device |
US20120257357A1 (en) * | 2009-10-05 | 2012-10-11 | Taiyo Yuden Co., Ltd. | Electrochemical capacitor |
US8902594B2 (en) * | 2009-10-05 | 2014-12-02 | Taiyo Yuden Co., Ltd. | Electrochemical capacitor |
JP2013257981A (ja) * | 2012-06-11 | 2013-12-26 | Toyota Motor Corp | 硫化物固体電池及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP5571816B2 (ja) | 2014-08-13 |
CN102057456A (zh) | 2011-05-11 |
US20110045327A1 (en) | 2011-02-24 |
JP2013153192A (ja) | 2013-08-08 |
KR20110004855A (ko) | 2011-01-14 |
US8765277B2 (en) | 2014-07-01 |
JPWO2009136660A1 (ja) | 2011-09-08 |
JP5320391B2 (ja) | 2013-10-23 |
CN103490025A (zh) | 2014-01-01 |
KR101146295B1 (ko) | 2012-05-21 |
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