WO2011115003A1 - 電気化学デバイス - Google Patents
電気化学デバイス Download PDFInfo
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- WO2011115003A1 WO2011115003A1 PCT/JP2011/055741 JP2011055741W WO2011115003A1 WO 2011115003 A1 WO2011115003 A1 WO 2011115003A1 JP 2011055741 W JP2011055741 W JP 2011055741W WO 2011115003 A1 WO2011115003 A1 WO 2011115003A1
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Definitions
- the present invention relates to an electrochemical device having a structure in which a storage element is enclosed in a package.
- Patent Documents 1 and 2 In electrochemical devices such as electric double layer capacitors, attention has been paid to thinning using a film package (refer to Patent Documents 1 and 2) (1) There is a growing demand for reflow soldering an electrochemical device to a circuit board and (2) a desire to enclose the electrochemical device in an IC card.
- This film package is generally made by using a laminate film having a heat-resistant layer, a barrier layer, and a heat seal layer in this order. Specifically, an electricity storage device provided with terminals is prepared, and the electricity storage device is placed on the heat seal layer side of the laminate film so that the tip of the terminal protrudes from the film end, and the heat seal layer is placed on the electricity storage device.
- the other laminate films are laminated so as to face each other, and the periphery of both laminate films is heated to heat-bond the heat seal layers together to integrate them.
- thermoplastic film such as polypropylene is used for the heat seal layer of the laminate film used in the film package so that heat sealing can be easily performed and temperature rise is not generated in the film package during heat sealing.
- thermoplastic plastic does not have a high melting point
- the above-mentioned temperature rise causes the “heat seal layer mutual Softening and melting are likely to occur in the “integrated part by heat sealing”.
- the internal pressure of the film package increases due to an increase in the vapor pressure of the electrolyte, the electrolyte, gas, etc. may leak from the softened or melted portion. If the electrolyte or gas leaks, there is a risk of causing problems such as contamination of the surroundings or deterioration of the function of the electrochemical device.
- the tip of the terminal is led to the outside through the “part where the heat seal layers are fused together and integrated”, so leakage of electrolytes, gases, etc. It tends to occur at the interface between the “portion where the heat seal layers are fused and integrated” and the terminal.
- the purpose of the various embodiments of the present invention is to enable the thinning of the package, as well as the temperature of the electrochemical device during the process of reflow soldering the electrochemical device to the circuit board or encapsulating in the IC card.
- An object of the present invention is to provide an electrochemical device that can reliably prevent the electrolyte, gas, and the like in the internal space from leaking to the outside even if the rise occurs.
- an embodiment of the present invention is an electrochemical device having a structure in which a power storage element is enclosed in a package.
- the package includes (1) a frame portion in which a through hole is formed and the frame.
- a first terminal plate integrally having a terminal portion projecting outward from the portion, and (2) a frame portion in which a through hole is formed and a terminal portion of the first terminal plate projecting outward from the frame portion at different positions.
- the other side of the frame of the first terminal plate A first cover plate provided, and (5) a second cover plate provided on the other surface of the first terminal plate so as to cover the through hole of the second terminal plate, wherein the power storage element includes the first cover plate And the inner space formed between the cover plates based on the through hole of the frame portion of the second terminal plate and the through hole of the frame plate, and a portion of the terminal portion of the first terminal plate and the A part of the terminal portion of the second terminal plate is exposed to the outside from the package.
- the package has a stacked structure in which the first cover plate, the first terminal plate, the frame plate, the second terminal plate, and the second cover plate are stacked in the same order and the surfaces facing each other are combined.
- the power storage element is enclosed in an internal space formed between the cover plates based on the through holes in the frame portions of both terminal plates and the through holes in the frame plates.
- the thickness of the frame plate or the thickness of each of the first and second terminal plates and the frame plate Even if the total thickness of the capacitor is made as thin as that of the power storage element, an internal space sufficient to enclose the power storage element can be formed in the package.
- the first cover plate is supported by the upper surface of the frame portion of the first terminal plate and the upper surface of the power storage element
- the second cover plate is supported by the lower surface of the frame portion of the second terminal plate and the lower surface of the power storage element. Even if the thickness of the package is made as thin as possible, the desired rigidity can be secured in the package. Thereby, thickness reduction comparable with the conventional electrochemical device which employ
- the frame portion and the frame plate of both terminal plates have an unbroken frame shape, even if the internal pressure of the internal space rises as the temperature rises, the internal space of the internal space is increased through the frame portion and the frame plate. Electrolytes and gases do not leak outside. As a result, even when the temperature of the electrochemical device rises in the process of reflow soldering the electrochemical device to the circuit board or in the process of sealing in the IC card, the electrolyte, gas, etc. in the internal space leaks to the outside. This can be surely prevented.
- the temperature of the electrochemical device can be reduced when the electrochemical device is reflow soldered to a circuit board or encapsulated in an IC card. Even if it raises, the electrochemical device which can prevent reliably that the electrolyte in the interior space, gas, etc. leak outside is provided.
- FIG. 1 is a top view of an electrochemical device according to a first embodiment of the present invention.
- FIG. 2 is a sectional view taken along line S11-S11 in FIG.
- FIG. 3 is a sectional view taken along line S12-S12 of FIG. 4A to 4C are top views of the components of the power storage element, and
- FIGS. 4D and 4E are diagrams showing a procedure for creating the power storage element.
- FIG. 5A to FIG. 5E are top views of package components.
- FIG. 6 is a top view of the electrochemical device according to the second embodiment of the present invention.
- FIG. 7 is a sectional view taken along line S21-S21 in FIG. FIG.
- FIG. 8A is a top view of the first terminal plate constituting the electrochemical device according to the third embodiment of the present invention
- FIG. 8B is a top view of the second terminal plate
- FIG. It is a top view of the electrochemical device produced using the 1st terminal plate and 2nd terminal plate which were shown to FIG. 8 (A) and FIG. 8 (B).
- FIG. 9A is a top view of the first terminal plate constituting the electrochemical device according to the fourth embodiment of the present invention
- FIG. 9B is a top view of the second terminal plate
- FIG. It is a top view of the electrochemical device created using the 1st terminal plate and the 2nd terminal plate which were shown in Drawing 9 (A) and Drawing 9 (B).
- This electrochemical device RB1 is configured by enclosing a power storage element SD in a package PA.
- the power storage element SD includes a first sheet (no reference) shown in FIG. 4 (A), a second sheet (no reference) shown in FIG. 4 (B), and a separate sheet 11e shown in FIG. 4 (C). And is composed of.
- the first sheet has a rectangular first collector electrode layer 11a, and the left side of both front and rear edges of the first collector electrode layer 11a is integrated with the first collector electrode layer 11a.
- two rectangular tabs 11a1 provided in line symmetry with respect to a center line (corresponding to a center line CL described later) extending in the left-right direction of the first collector electrode layer 11a, and the first collector electrode layer A rectangular first polarizable electrode layer 11b formed in a region excluding both tabs 11a1 on the upper surface of 11a.
- the second sheet is integrally formed with the rectangular second collector electrode layer 11c and the second collector electrode layer 11c on the right side of both front and rear edges of the second collector electrode layer 11c.
- the rectangular tab 11c1 provided in line symmetry with respect to the center line extending in the left-right direction of the first collector electrode layer 11a and both tabs 11c1 on the lower surface of the second collector electrode layer 11c.
- a rectangular second polarizable electrode layer 11d formed.
- the external dimensions of the second collector electrode layer 11c, the tab 11c1, and the second polarizable electrode layer 11d are substantially the same as the external dimensions of the first collector electrode layer 11a, the tab 11a1, and the first polarizable electrode layer 11b of the first sheet. is there.
- the second sheet can be provided by turning over a sheet having the same configuration as the first sheet.
- the separate sheet 11e is formed in a rectangular shape, and the outer dimensions thereof are the first polarizable electrode layer 11b of the first sheet and the second polarizable electrode layer 11d of the second sheet. It is formed to be larger than the outer dimensions.
- the first collector electrode layer 11a and the second collector electrode layer 11c are made of a conductive material such as aluminum or platinum, and the thickness thereof is, for example, 5 to 50 ⁇ m.
- the first polarizable electrode layer 11b and the second polarizable electrode layer 11d are made of an active material such as PAS (polyacenic organic semiconductor) or activated carbon, and the thickness thereof is, for example, 10 to 100 ⁇ m.
- the separate sheet 11e is made of an ion permeable film such as a cellulose film or a plastic film, and has a thickness of, for example, 10 to 50 ⁇ m.
- the seperate sheet 11e is placed on the first polarizable electrode layer 11b of the first sheet and the front, rear, left and right edges thereof have the first polarizability.
- the electrode layer 11b is stacked so as to protrude from the front, rear, left and right edges, and the second polarizable electrode layer 11d of the second sheet is placed on the seperate sheet 11e so that the front, rear, left and right edges thereof are front, rear, left and right edges of the first polarizable electrode layer 11b. Overlay to match.
- the entire superposition is folded along the center line CL (refer to FIG. 4 (D)) in the center in the front-rear direction, and 2 of the first collector electrode layer 11a.
- Two tabs 11a1 are overlapped, and two tabs 11c1 of the second collector electrode layer 11c are overlapped.
- the two overlapping tabs 11a1 are partially mutually connected by a welding technique such as spot welding or ultrasonic welding, and the two overlapping tabs 11c1 are partially mutually connected by a welding technique such as spot welding or ultrasonic welding. Join.
- a welding technique such as spot welding or ultrasonic welding
- a welding technique such as spot welding or ultrasonic welding
- the produced storage element SD has the first collecting electrode layer 11 a located on the outermost side, the first polarizable electrode layer 11 b located on the inner side, and the compartment sheet 11 e on the inner side. Is located, the second polarizable electrode layer 11d is located inside thereof, and the second collector electrode layer 11c is located inside thereof. As shown in FIG. 2, this laminated structure has a 10-layer structure in the vertical direction.
- each layer and the thickness (vertical dimension) of the power storage element SD are drawn thicker than the actual thickness, but as described above, the thickness of each layer is extremely high. Since it is thin, the actual thickness of the actual storage element SD is less than 1.0 mm. Due to such a thin shape, each layer constituting the actual power storage element SD is bent at an angle close to 180 degrees. As a result, the tab 11a1 and the tab 11c1 are arranged so as to be close to each other in the vertical direction, and are configured to be smoothly connected to the corresponding first collector electrode layer 11a or second collector electrode layer 11c.
- the package PA includes a first terminal plate 12 shown in FIG. 5A, a second terminal plate 13 shown in FIG. 5B, a frame plate 14 shown in FIG. 5C, and FIG.
- the first cover plate 15 shown in (D), the second cover plate 16 shown in FIG. 5 (E), and the exterior material 17 shown in FIGS. 1 to 3 are configured.
- the first terminal plate 12 is a rectangular frame-shaped frame portion 12a in which a substantially rectangular through-hole 12a1 is formed at the center (the frame portion 12a is a tab connecting portion described later). 12b and the terminal portion 12c), a rectangular tab connecting portion 12b provided integrally with the frame portion 12a inside the frame portion 12a (on the left side of the front end edge of the through hole 12a1), a frame On the left side of the front end edge of the portion 12a, there is a rectangular terminal portion 12c that protrudes outward from the front end edge and is provided integrally with the frame portion 12a.
- the widths of the front, rear, left and right portions of the frame portion 12a may all be the same, and the upper and lower surfaces of the frame portion 12a, the tab connecting portion 12b, and the terminal portion 12c may be formed on the same plane.
- the second terminal plate 13 is a rectangular frame-shaped frame portion 13a having a substantially rectangular through-hole 13a1 formed at the center (the frame portion 13a here is a tab connecting portion described later).
- 13b and the terminal portion 13c) a rectangular tab connecting portion 13b integrally provided with the frame portion 13a on the inner side of the frame portion 13a (on the right side of the front end edge of the through hole 13a1), a frame A rectangular terminal portion 13c that protrudes outward from the front end edge and is provided integrally with the frame portion 13a is provided on the right side of the front end edge of the portion 13.
- the outer dimensions of the frame portion 13a, the tab connection portion 13b, and the terminal portion 13c are substantially the same as the outer dimensions of the frame portion 12a, the tab connection portion 12b, and the terminal portion 12c of the first terminal plate 12, and the inner dimensions of the through hole 13a1.
- the inner dimension when the tab 13b is excluded is substantially the same as the inner dimension of the through hole 12a1 of the first terminal plate 12 (here, the inner dimension when the tab 12b is excluded).
- the width of the front, rear, left and right portions of the frame portion 13 a is substantially the same as the width of the front, rear, left and right portions of the frame portion 12 a of the first terminal plate 12.
- the second terminal plate 13 can be used by turning over the same one as the first terminal plate 12.
- the frame plate 14 has a rectangular frame shape in which a rectangular through hole 14a is formed at the center.
- the outer dimensions of the frame plate 14 are substantially the same as the outer dimensions of the frame portions 12a and 13a of the terminal plates 12 and 13, and the inner dimensions of the through holes 14a are the inner dimensions of the through holes 12a1 and 13a1 of the both terminal plates 12 and 13.
- the width of the front, rear, left and right portions is the same as the width of the front, rear, left and right portions of the frame portions 12a and 13a of both terminal plates 12 and 13. Is almost the same.
- the first cover plate 15 is formed in a rectangular shape having substantially the same outer dimensions as the outer dimensions of the frame portions 12a and 13a of the both terminal plates 12 and 13.
- the second cover plate 16 has a rectangular shape having substantially the same outer dimensions as the outer dimensions of the frame portions 12a and 13a of the both terminal plates 12 and 13.
- the second cover plate 16 may be the same as the first cover plate 15.
- the exterior material 17 forms the outer surface of the package PA and covers the entire portion sandwiched between the cover plates 15 and 16.
- Both terminal plates 12 and 13 are made of a conductive material such as aluminum or platinum, and the thickness thereof is, for example, 50 to 150 ⁇ m.
- the frame plate 14 is a heat-resistant insulating material such as a heat-resistant plastic (for example, polyimide, polyamideimide, or epoxy resin) or ceramics (for example, alumina or zirconia), and preferably has a heat resistance temperature for continuous use of 150 ° C. or higher. It is made of an insulating material and has a thickness of 100 to 700 ⁇ m, for example.
- both cover plates 15 and 16 are made of a conductive material such as aluminum or platinum or the same heat-resistant insulating material as the frame plate 14 and have a thickness of, for example, 50 to 150 ⁇ m.
- the exterior material 17 is made of a heat resistant insulating material such as a heat resistant plastic (for example, polyimide, polyamideimide, or epoxy resin), preferably a heat resistant insulating material having a continuous use heat resistant temperature of 150 ° C. or more, and the thickness thereof is For example, it is 100 to 500 ⁇ m.
- a heat resistant insulating material such as a heat resistant plastic (for example, polyimide, polyamideimide, or epoxy resin), preferably a heat resistant insulating material having a continuous use heat resistant temperature of 150 ° C. or more, and the thickness thereof is For example, it is 100 to 500 ⁇ m.
- the first cover plate 15, the first terminal plate 12, the frame plate 14, the second terminal plate 13, and the second cover plate 16 The surfaces facing each other are joined by overlapping in this order.
- the frame portions 12a and 13a of both terminal plates 12 and 13 have through holes 12a1 and 13a1 having substantially the same shape, and the frame plate 14 interposed between the terminal plates 12 and 13 has the through holes 12a1 and 13a1.
- a through hole 14a is formed at a position corresponding to 13a1.
- the first cover plate 15 covers the upper surface of the frame portion 12 a of the first terminal plate 12 to close the through hole 12 a 1
- the second cover plate 16 covers the lower surface of the frame portion 13 a of the second terminal plate 13 and penetrates therethrough.
- the hole 13a1 is closed.
- the internal space IS (see FIGS. 2 and 3) is defined by the through holes 12a1, 13a1, 14a, and the cover plates 15 and 16.
- the storage element SD (see FIG. 4E) is inserted into the internal space IS before being closed in the orientation shown in FIG. 3, and the tab 11a1 and the first terminal plate of the storage element SD are inserted.
- 12 tab connecting portions 12b are partially coupled by a welding technique such as spot welding or ultrasonic welding, and the tab 11c1 and the tab connecting portion 13b of the second terminal plate 13 are connected by spot welding or ultrasonic welding. Partially joined by welding technique.
- an electrolyte for example, a liquid material obtained by adding triethylmethylammonium borofluoride to propylene carbonate as a solvent or polyacrylonitrile or the like is added to the internal space IS. Inject a gel or the like).
- a heat-resistant adhesive such as a polyimide-based adhesive or a polyamide-imide-based adhesive, preferably a heat-resistant adhesive having a continuous use heat-resistant temperature of 150 ° C. or higher in a cured state can be used.
- a heat-resistant adhesive is used for bonding, and the type can be selected according to the material of each plate, so it is extremely easy to ensure high bonding strength at each bonding interface. It is.
- the upper surface of the frame portion 12a of the first terminal plate 12 is coupled to the periphery of the lower surface of the first cover plate 15 by the heat resistant adhesive, and the lower surface of the frame portion 12a is bonded to the frame sheet 14 by the heat resistant adhesive. Coupled to the top surface of the substrate. Further, the upper surface of the frame portion 13a of the second terminal plate 13 is bonded to the lower surface of the frame sheet 14 by a heat resistant adhesive, and the lower surface of the frame portion 13a is bonded to the lower cover plate 16 by a heat resistant adhesive. Coupled around the top surface.
- the plate after the plates are joined is inserted into a mold (not shown) having a cavity aligned with the outer shape of the outer packaging material 17, and the fluid of the outer packaging material 17 is put into the cavity and cured.
- the fluid of the exterior member 17 may be attached to the entire outer surface of the plate after the plates are joined by a coating technique such as application or spraying, and cured.
- the formation method of these exterior materials 17 is an illustration, and the formation method of the exterior materials 17 in various embodiment of this invention is not restricted to these.
- the electrochemical device RB1 shown in FIG. 1 to FIG. 3 has the storage element SD enclosed in the package PA and the front portions of the terminal portions 12c and 13c of both terminal plates 12 and 13. Can be configured to be exposed to the outside from the front surface of the package PA.
- the procedure for creating the package PA described above is merely an example, and the package PA according to various embodiments of the present invention can be created by various creation procedures apparent to those skilled in the art.
- the overall thickness (vertical dimension) of the actual package PA is, for example, less than 2.5 mm. Less than 5 mm.
- the frame plate 14 has substantially the same thickness as the power storage element SD.
- the sum of the thicknesses of both terminal plates 12 and 13 and the thickness of the frame plate 14 is substantially the same as that of the power storage element SD.
- the thickness (vertical dimension) of the storage element SD and the thickness (vertical dimension) of the frame plate 14 are drawn to be thicker than actual dimensions. I want to be.
- the effects exhibited by the electrochemical device RB1 according to various embodiments of the present invention include the following.
- the main body of the package PA is the first cover plate 15, the first terminal plate 12, the frame plate 14, the second terminal plate 13, and the second cover plate 16 in this order.
- the power storage element SD includes a through hole 12a1 and 13a1 of the frame portions 12a and 13a of the terminal plates 12 and 13, and a through hole 14a of the frame plate 14 and Is enclosed in an internal space IS formed between the cover plates 15 and 16.
- the frame plate 14 (or both terminals) Even if the total thickness of the plates 12 and 13 and the thickness of the frame plate 14 is reduced to the same extent as the power storage element SD, an internal space IS sufficient to enclose the power storage element SD is provided in the package PA. Can be formed.
- the cover plate 15 is supported by the upper surface of the frame portion 12a of the first terminal plate 12 and the upper surface of the power storage element, and the cover plate 16 is supported by the lower surface of the frame portion 13a of the terminal plate 13 and the lower surface of the power storage element SD. Even if the thickness of each plate is made as thin as possible, the intended rigidity of the package PA can be ensured. Thereby, thickness reduction comparable to the conventional electrochemical device which employ
- the frame portions 12a and 13a of both the terminal plates 12 and 13 and the frame plate 14 have a continuous frame shape, even if the internal pressure of the internal space IS rises as the temperature rises, the frame portion 12a And the electrolyte and gas in the internal space IS do not leak to the outside through the frame plate 14 and 13a.
- the electrolyte, gas, etc. in the internal space IS are externally exposed. It is possible to reliably prevent leakage.
- the mutually facing surfaces of the plates constituting the main body of the package PA are bonded using a heat-resistant adhesive, but the heat-resistant adhesive is in a cured state. Since a material having a continuous use heat resistant temperature that can withstand the temperature rise can be appropriately used according to the material of each plate, in addition to ensuring a high bonding strength at each bonding interface, the internal pressure of the internal space IS as the temperature rises It is possible to prevent the electrolyte, gas, and the like in the internal space IS from leaking to the outside through the bonding interfaces even if the rises.
- the intended rigidity of the package PA can be ensured even if the thickness of each plate is made as thin as possible. Therefore, the electrochemical device RB1 is used as a circuit board. Even if a force is applied to the outer surface of the electrochemical device RB1 during reflow soldering or handling when encapsulating in an IC card, the package PA can be prevented from being deformed or damaged.
- the exterior material 17 that forms the outer surface of the package PA since the exterior material 17 that forms the outer surface of the package PA is provided, the exterior material 17 can further increase the rigidity of the package PA, and the exterior material 17 Therefore, the temperature rise in the internal space IS of the electrochemical device RB1 can be suppressed or delayed to some extent.
- An electrochemical device RB2 according to another embodiment of the present invention will be described with reference to FIGS.
- the electrochemical device RB2 is different from the electrochemical device RB1 in that a package PA 'having no exterior material 17 is used.
- the package PA ′ includes a first terminal plate 12 shown in FIG. 5A, a second terminal plate 13 shown in FIG. 5B, a frame plate 14-1 shown in FIG.
- the frame plate 14-1 has a rectangular frame shape in which a rectangular through hole 14a (not shown) is formed in the center.
- the outer dimension of the frame plate 14-1 is larger than the outer dimensions of the frame portions 12a and 13a of the terminal plates 12 and 13, and the inner dimension of the through hole 14a is the inner dimension of the through holes 12a1 and 13a1 of the both terminal plates 12 and 13.
- the width of the front, rear, left and right portions is the same as the width of the front, rear, left and right portions of the frame portions 12a and 13a of the terminal plates 12 and 13 (referred to herein as the inner dimensions when the tabs 12b and 13b are excluded). Bigger than.
- the first cover plate 15-1 is formed in a rectangular shape having substantially the same external dimensions as the external dimensions of the frame plate 14-1.
- the second cover plate 16-1 is formed in a rectangular shape having substantially the same outer dimensions as the outer dimensions of the frame plate 14-1.
- the second cover plate 16-1 can be the same as the first cover plate 15-1.
- the material and thickness of the frame plate 14-1 and the cover plates 15-1 and 16-1 are substantially the same as the material and thickness of the frame plate 14 and the cover plates 15 and 16 described in the first embodiment. Can be.
- the package PA ′ includes the first cover plate 15-1, the first terminal plate 12, the frame plate 14-1, the second terminal plate 13, and the second cover plate 16-1. Are combined in this order and the faces facing each other are combined.
- the package PA ' can be created by substantially the same procedure as the procedure for creating the package PA described above. For example, various procedures necessary for manufacturing the package PA ′, such as a procedure for superimposing the plates, a procedure for injecting an electrolyte, and a procedure for bonding the plates to each other using an adhesive, are performed in the same manner as in the above-described embodiment. It can be carried out.
- an internal space IS (see FIG. 7) based on the through holes 12a1, 13a1, and 14a is formed between the cover plates 15 and 16. Further, since the outer dimensions of the frame plate 14-1 and the cover plates 15-1 and 16-1 are larger than the outer dimensions of the frame portions 12a and 13a of the terminal plates 12 and 13, the frame plate 14-1 and the cover plates The front and rear left and right edges of 15-1 and 16-1 project outward by a dimensional difference from the front and rear and left and right edges of the frame portions 12a and 13a of both terminal plates 12 and 13, respectively.
- an electrochemical device RB3 according to another embodiment of the present invention will be described.
- the electrochemical device RB3 is different from the electrochemical device RB1 described in the first embodiment in that the first terminal plate 12-1 shown in FIG. 8A is used instead of the first terminal plate 12.
- the point is that the second terminal plate 13-1 shown in FIG. 8B is used in place of the point and the second terminal plate 13.
- the first terminal plate 12-1 is a rectangular frame-shaped frame portion 12a in which a substantially rectangular through-hole 12a1 is formed at the center (the frame portion 12a here is a tab described later). And a rectangular tab connecting portion 12b provided integrally with the frame portion 12a on the inner side of the frame portion 12a (on the left side of the front end edge of the through hole 12a1), and the connecting portion 12b and the terminal portion 12c. And a rectangular terminal portion 12c that protrudes outward from the front end edge and is provided integrally with the frame portion 12a at the center of the front end edge of the frame portion 12a.
- the widths of the front, rear, left and right portions of the frame portion 12a are all the same, and the upper and lower surfaces of the frame portion 12a, the tab connecting portion 12b, and the terminal portion 12c are on the same plane.
- the second terminal plate 13-1 has a rectangular frame-shaped frame portion 13a in which a substantially rectangular through-hole 13a1 is formed at the center (the frame portion 13a here is a tab described later). And a rectangular tab connecting portion 13b provided integrally with the frame portion 13a on the inner side of the frame portion 13a (on the right side of the front end edge of the through hole 13a1), and the connecting portion 13b and the terminal portion 13c.
- the outer dimensions of the frame portion 13a, the tab connection portion 13b, and the terminal portion 13c are substantially the same as the outer dimensions of the frame portion 12a, the tab connection portion 12b, and the terminal portion 12c of the first terminal plate 12, and the inner dimensions of the through hole 13a1.
- the inner dimension when the tab 13b is excluded is substantially the same as the inner dimension of the through hole 12a1 of the first terminal plate 12 (here, the inner dimension when the tab 12b is excluded).
- the width of the front, rear, left and right portions of the frame portion 13 a is substantially the same as the width of the front, rear, left and right portions of the frame portion 12 a of the first terminal plate 12.
- both terminal plates 12-1 and 13-1 can be substantially the same as the material and thickness of both terminal plates 12 and 13 described in the first embodiment.
- the package PA shown in FIG. 8 is manufactured by using the both terminal plates 12-1 and 13-1 in place of the both terminal plates 12 and 13 in substantially the same procedure as the above-described package PA. Can do. For example, various steps necessary for manufacturing the package PA, such as a procedure for superimposing the plates, a procedure for injecting an electrolyte, and a procedure for bonding the plates together with an adhesive, are performed by the same method as in the above-described embodiment. be able to. According to this procedure, the electrochemical device RB3 shown in FIG. 8C can be obtained using the package PA.
- the power storage element SD is enclosed in the package PA, the front portion of the terminal portion 12c of the first terminal plate 12-1 is exposed to the outside from the front surface of the package PA, and the second terminal plate 13-1 The rear portion of the terminal portion 13c is exposed to the outside from the rear surface of the package PA.
- the electrochemical device RB3 by using the two terminal plates 12-1 and 13-1 in which the positions of the terminal portions (12c and 13c) are different, the exposure positions of the terminal portions (12c and 13c) are different.
- the chemical device RB3 can be easily obtained.
- the exposed position of the terminal portion can be easily changed.
- the terminal plates 12-1 and 13-1 shown in FIGS. 8A and 8B and terminals at different positions are used. If the terminal plates on which the portions 12c and 13c are formed are respectively used, the exposed position of the terminal portion can be easily changed in the same manner.
- an electrochemical device RB4 according to another embodiment of the present invention will be described.
- This electrochemical device RB4 differs from the above-described electrochemical device RB1 in that the first terminal plate 12-2 shown in FIG. 9A is used in place of the first terminal plate 12, and the second terminal plate 13 is used. Instead, the second terminal plate 13-2 shown in FIG. 9B is used.
- the first terminal plate 12-2 has a rectangular frame-shaped frame portion 12a in which a substantially rectangular through-hole 12a1 is formed at the center (the frame portion 12a here is a tab described later). And a rectangular tab connecting portion 12b provided integrally with the frame portion 12a on the inner side of the frame portion 12a (on the left side of the front end edge of the through hole 12a1), and the connecting portion 12b and the terminal portion 12c.
- a rectangular terminal portion 12c projecting outward from the front end edge at the center of the front end edge of the frame portion 12a and provided integrally with the frame portion 12a; and outward from the right end edge at the center of the right end edge of the frame portion 12a.
- a rectangular terminal portion 12c ′ provided integrally with the frame portion 12a.
- the widths of the front, rear, left and right portions of the frame portion 12a are all the same, and the upper and lower surfaces of the frame portion 12a, the tab connecting portion 12b, and the terminal portions 12c and 12c 'are on the same plane.
- the second terminal plate 13-2 has a rectangular frame-shaped frame portion 13a in which a substantially rectangular through-hole 13a1 is formed at the center (the frame portion 13a here is a tab described later). And a rectangular tab connecting portion 13b provided integrally with the frame portion 13a on the inner side of the frame portion 13a (on the right side of the front end edge of the through hole 13a1), and the connecting portion 13b and the terminal portion 13c.
- a rectangular terminal portion 13c projecting outward from the rear end edge and provided integrally with the frame portion 13a at the center of the rear end edge of the frame portion 13, and the left end edge at the center of the left end edge of the frame portion 13; And a rectangular terminal portion 13c ′ provided integrally with the frame portion 13a.
- the outer dimensions of the frame portion 13a, the tab connecting portion 13b, and the terminal portions 13c and 13c ′ are substantially the same as the outer dimensions of the frame portion 12a, the tab connecting portion 12b, and the terminal portions 12c and 12c ′ of the first terminal plate 12, and are penetrated.
- the inner dimension of the hole 13a1 (here, the inner dimension when the tab 13b is excluded) is the inner dimension of the through hole 12a1 of the first terminal plate 12 (here, the inner dimension when the tab 12b is excluded).
- the width of the front, rear, left and right portions of the frame portion 13a is substantially the same as the width of the front, rear, left and right portions of the frame portion 12a of the first terminal plate 12.
- both terminal plates 12-2 and 13-2 can be configured to be substantially the same as the material and thickness of both terminal plates 12 and 13 described in the first embodiment.
- the package PA shown in FIG. 9 is produced by the same procedure as that described in the first embodiment except that both the terminal plates 12-2 and 13-2 are used instead of the both terminal plates 12 and 13. .
- the electrochemical device RB4 shown in FIG. 9C that is, the storage element SD is enclosed in the package PA, and the front side of the terminal portion 12c of the first terminal plate 12-2.
- the portion is exposed to the outside from the front surface of the package PA
- the right portion of the terminal portion 12c ′ is exposed to the outside from the right surface of the package PA
- the rear portion of the terminal portion 13c of the second terminal plate 13-2 is the package PA. It is possible to obtain the electrochemical device RB4 exposed to the outside from the rear surface and having the left portion of the terminal portion 13c ′ exposed to the outside from the left surface of the package PA.
- the terminal portions (12c, 12c ′) can be obtained by using both terminal plates 12-2 and 13-2 having different numbers of terminal portions (12c, 12c ′, 13c and 13c ′).
- 13c and 13c ′) can be easily obtained electrochemical devices RB4 having different exposure numbers.
- the number of exposure of a terminal part can be easily changed by using each terminal plate in which the desired number of terminal parts were formed.
- the two terminal plates 12 and 13 of the electrochemical device RB2 instead of the two terminal plates 12 and 13 of the electrochemical device RB2, the two terminal plates 12-2 and 13-2 shown in FIGS. 9A and 9B, or a different number of terminals are used. If the terminal plates on which the portions 12c and 13c are formed are respectively used, the exposed position of the terminal portion can be easily changed in the same manner.
- the power storage element SD may be a non-folding type power storage element formed by laminating a collector electrode layer, a polarizable electrode layer, and a separate sheet in one direction in a predetermined order. Further, the number of stacked power storage elements SD can be arbitrarily changed regardless of whether it is a folding type or a non-folding type.
- the positions of the tab connecting portions 12b provided on the first terminal plates 12, 12-1 and 12-2 and the tab connecting portions 13b provided on the second terminal plates 13, 13-1 and 13-2 are determined by the storage element ( It can be arbitrarily changed according to the tab position of the folding type storage element SD and the non-folding type storage element.
- the shape of the frame portion 12a of the first terminal plates 12, 12-1 and 12-2, the frame portion 13a of the second terminal plates 13, 13-1 and 13-2, and the frame plates 14 and 14-1 described above A shape other than a rectangle such as a circular frame shape or an elliptical frame shape may be used. Further, in accordance with these shape changes, the shapes of the first cover plates 15 and 15-1 and the second cover plates 16 and 16-1 may be shapes other than a rectangle such as a circle or an ellipse.
- the surfaces of the plates facing each other are bonded using a heat-resistant adhesive, but other bonding methods described below may be used for the bonding.
- each plate can be joined using direct joining.
- Material of the first terminal plates 12, 12-1, 12-2, the first cover plates 15 and 15-1, the second terminal plates 13, 13-1, 13-2, and the second cover plates 16, 16-1 are made of materials that can be directly coupled by direct coupling methods such as laser welding, resistance welding, and ultrasonic welding.
- the first terminal plates 12, 12-1 and 12-2 are directly coupled to the upper surface region of the frame plates 14 and 14-1 where the lower surfaces of the first terminal plates 12, 12-1 and 12-2 face each other.
- a layer made of a material that can be directly bonded by a thin film formation method such as a vapor phase growth method or a liquid phase growth method, or a thick film formation method such as paste coating and baking is previously formed.
- the second terminal plates 13, 13-1 and 13-2 are directly coupled to the lower surface region of the frame plates 14 and 14-1 where the upper surfaces of the second terminal plates 13, 13-1 and 13-2 face each other.
- a layer made of a material that can be directly bonded by a method is formed in advance by a thin film forming method such as a vapor phase growth method or a liquid phase growth method, or a thick film forming method such as paste coating and baking.
- the surfaces where the plates face each other can be directly coupled by the direct coupling method.
- the packages PA and PA ′ can be formed without using a heat-resistant adhesive.
- each plate can be bonded using both direct bonding and indirect bonding.
- a layer made of a material that can be bonded to the upper surface region of the frame plates 14 and 14-1 facing the lower surfaces of the first terminal plates 12, 12-1 and 12-2 by an indirect coupling method such as brazing is used. It is formed in advance by a thin film formation method or a thick film formation method, and an indirect coupling method such as brazing is applied to the lower surface region of the frame plates 14 and 14-1 where the upper surfaces of the second terminal plates 13, 13-1 and 13-2 are opposed
- a layer made of a bondable material is formed in advance by an ordinary thin film forming method or the thick film forming method.
- the first terminal plate 12, 12-1 or 12-2 is coupled to the frame plate 14 or 14-1 by the indirect coupling method
- the second terminal plate 13, 13-1 or 13-2 is coupled by the indirect coupling method. It can be coupled to the frame plate 14 or 14-1.
- the first terminal plate 12, 12-1 or 12-2 indirectly coupled to the frame plate 14 or 14-1 is directly coupled to the first cover plate 15 or 15-1 by the direct coupling technique.
- Direct coupling and indirect by directly coupling the second terminal plate 13, 13-1 or 13-2 indirectly coupled to the frame plate 14 or 14-1 to the second cover plate 16 or 16-1 by the direct coupling method.
- Packages PA and PA ′ can be created in combination with binding.
- the present invention can be widely applied to various electrochemical devices such as an electric double layer capacitor, a lithium ion capacitor, a redox capacitor, and a lithium ion battery.
- RB1, RB2, RB3, RB4 ... electrochemical device, SD ... electric storage element, PA, PA '... package, IR ... internal space, 11a ... first collecting electrode layer, 11a1 ... tab, 11b ... first polarizable electrode layer, 11c ... second collector electrode layer, 11c1 ... tab, 11d ... second polarizable electrode layer 11d, 11e ... separate sheet, 12, 12-1, 12-2 ... first terminal plate, 12a ... frame, 12a1 ... through Hole, 12b... Tab connecting portion, 12c, 12c ′... Terminal portion, 13, 13-1, 13-2... Second terminal plate, 13a... Frame portion, 13a1. '... terminal portion, 14, 14-1 ... frame plate, 14a ... through hole, 15,15-1 ... first cover plate, 16,16-1 ... second cover plate, 17 ... exterior material.
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Abstract
Description
Claims (4)
- 蓄電素子をパッケージ内に封入した構造を備える電気化学デバイスであって、
前記パッケージは、(1)貫通孔が形成された枠部と該枠部から外側に突出する端子部とを一体に有する第1端子プレートと、(2)貫通孔が形成された枠部と第1端子プレートの端子部とは異なる位置において該枠部から外側に突出する端子部とを一体に有する第2端子プレートと、(3)前記第1及び第2端子プレートの貫通孔に対応した貫通孔を有し、且つ、前記第1端子プレートの枠部の一面と前記第2端子プレートの枠部の一面との間に介装される枠プレートと、(4)前記第1端子プレートの貫通孔を覆うように前記第1端子プレートの枠部の他面に設けられる第1カバープレートと、(5)前記第2端子プレートの貫通孔を覆うように前記第1端子プレートの他面に設けられる第2カバープレートとを備え、
前記第1及び第2の端子プレートのそれぞれの厚みと前記枠プレートの厚みとの合計が前記蓄電素子の厚みと実質的に同じになり、
前記蓄電素子は、前記第1及び第2端子プレートの枠部の貫通孔と前記枠プレートの貫通孔とに基づいて両カバープレート間に形成された内部空間に封入されており、
前記第1端子プレートの端子部の一部分と前記第2端子プレートの端子部の一部分は、パッケージから外部に露出している電気化学デバイス。 - 前記パッケージの外面を覆う外装材をさらに備え、前記第1端子プレートの端子部の一部と前記第2端子プレートの端子部の一部が該外装材から露出している請求項1に記載の電気化学デバイス。
- 前記第1端子プレートと前記第2端子プレートはそれぞれ枠部の内側にタブ接続部を一体に有しており、
前記蓄電素子は使用極性が互いに異なる第1及び第2のタブを有しており、該第1のタブを第1端子プレートのタブ接続部に電気的に接続し、該第2のタブを第2端子プレートのタブ接続部に電気的に接続された請求項1または2に記載の電気化学デバイス。 - 各プレートの互いに向き合う面は耐熱性接着剤を用いて結合されていて、該耐熱性接着剤には硬化状態で150℃以上の連続使用耐熱温度を有するものが用いられている請求項1ないし3の何れか1項に記載の電気化学デバイス。
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US11830672B2 (en) | 2016-11-23 | 2023-11-28 | KYOCERA AVX Components Corporation | Ultracapacitor for use in a solder reflow process |
US10930978B2 (en) * | 2017-01-27 | 2021-02-23 | Ford Global Technologies, Llc | Multifunctional ion pouch battery cell frame |
US11189872B2 (en) | 2017-01-27 | 2021-11-30 | Ford Global Technologies, Llc | Multifunctional pouch battery cell frame |
CN110515882A (zh) * | 2019-08-29 | 2019-11-29 | 山东浪潮人工智能研究院有限公司 | 一种获取外设插槽板卡温度的pxie机箱系统及方法 |
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