Electronic apparatus

Abstract

To provide a novel multilayer film, a multilayer film that can be used for a package material of a secondary battery, or a multilayer film that can be used for a secondary battery suitable to a mobile information terminal.SOLUTION: It is preferable that at least a metal layer and a resin layer are stacked and the resin of the resin layer has a durometer hardness of A90 or less, preferably A60 or less. Moreover, it is preferable to use a material that will not be broken when stretched in one direction by 150%, preferably 200%. In addition, it is more preferable that the thickness is 100 μm or more and 5 mm or less, preferably 500 μm or more and 3 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] One aspect of the present invention relates to a secondary battery member and a method for producing the same.

[0002] Note that one embodiment of the present invention is not limited to the above technical field. The technical field of one aspect relates to an article, a method, or a manufacturing method. One aspect of the present invention is a process, machine, manufacture, or composition. Therefore, the present invention more specifically disclosed herein The technical field of one embodiment of the present invention is a semiconductor device, a display device, a light-emitting device, a power storage device, a memory device, The driving method thereof or the manufacturing method thereof can be given as an example.

[0003] In this specification, the term "electronic device" refers to any device that has a secondary battery. Electro-optical devices having a secondary battery, information terminal devices having a secondary battery, vehicles having a secondary battery, etc. It is an electronic device. [Background technology]

[0004] In recent years, mobile information terminals, such as smartphones, have been actively developed. There is a strong demand from users for portable information terminals, which are a type of terminal, to be lightweight and small in size.

[0005] You can get information visually anywhere without having to worry about where you are and without restricting the freedom of your hands. As an example of a wearable device, Patent Document 1 is disclosed. A goggle-type display device is disclosed that includes a PU and is capable of communication.

[0006] Wearable devices and mobile information terminals are equipped with secondary batteries that can be repeatedly charged and discharged. Wearable devices and mobile information terminals are often equipped with a However, there are restrictions on the secondary batteries that can be installed, which limits the time that the device can be operated. The secondary batteries installed in portable devices and mobile information terminals must be lightweight, small, and have a long life. It is required that time be available.

[0007] Examples of secondary batteries include nickel-metal hydride batteries and lithium-ion secondary batteries. However, lithium-ion secondary batteries are being actively developed because they have high capacity and can be made small. It is believed that.

[0008] Metal cans have been used as the exterior material for housing lithium-ion secondary batteries. However, due to its light weight, freedom of shape selection, and excellent heat dissipation properties, A multi-layer film of resin is used. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] International Publication No. 2012 / 050182 Brochure Summary of the Invention [Problem to be solved by the invention]

[0010] One object is to provide a novel multilayer film.

[0011] Another object is to provide a multilayer film suitable for use as an exterior material for a secondary battery.

[0012] Alternatively, it is possible to provide a multilayer film suitable for use in a secondary battery suitable for a portable information terminal. Another object of the present invention is to provide a novel film or the like.

[0013] Another object of the present invention is to provide a secondary battery suitable for a portable information terminal. One object of the present invention is to provide a power storage device or the like.

[0014] Another object is to provide a secondary battery suitable for a wearable device.

[0015] Or, to provide an electronic device with a new structure. Specifically, to provide various external shapes. To provide an electronic device having a novel structure capable of performing various external shapes. It is also an object of the present invention to provide an electronic device having such a structure and a secondary battery having a shape suitable for the electronic device. .

[0016] The description of these problems does not preclude the existence of other problems. The embodiment does not necessarily have to solve all of these problems. The above will become apparent from the description in the specification, drawings, claims, etc. It is possible to extract other issues from the descriptions in the patent, claims, etc. [Means for solving the problem]

[0017] One embodiment of the configuration of the invention disclosed in this specification is a thin film having at least a metal layer and a thickness of 100 μm to 5 mm The resin constituting the first resin layer has a durometer hardness of The material is characterized by being A90 or less and not breaking even when stretched 150% in one direction. It is a multi-layer film.

[0018] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, It is a multi-layer film in which the metal constituting the metal layer is aluminum.

[0019] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, The multilayer film is formed by laminating the metal layer and the first resin layer in contact with each other.

[0020] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, a multilayer film in which an adhesive layer is provided between the metal layer and the first resin layer. .

[0021] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, and further comprising a second resin layer.

[0022] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, The second resin layer is a multilayer structure provided on the opposite side of the metal layer from the first resin layer. It is a film.

[0023] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, The second resin layer has a thickness of 100 μm or more and 5 mm or less, and the resin constituting the second resin layer is A material with a durometer hardness of A90 or less that will not break even if stretched 150% in one direction. It is a multilayer film.

[0024] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, The durometer hardness of the resin constituting the first resin layer and / or the second resin layer is The multilayer film is characterized by having a hardness of A60 or less.

[0025] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, The resin constituting the first resin layer and / or the second resin layer is pulled by 200% in one direction. This multilayer film is characterized by being made of a material that will not break even when stretched.

[0026] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, The resin constituting the first resin layer and / or the second resin layer is a silicone resin. It is a multi-layer film.

[0027] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration, , a multilayer film in which at least a portion of the metal layer is embossed.

[0028] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration. It is an exterior material for secondary batteries.

[0029] Another embodiment of the configuration of the invention disclosed in this specification is a multilayer film having the above configuration as an exterior body. This is a secondary battery used as a

[0030] In the above configuration, the exterior body of the secondary battery preferably has a curvature radius of 10 mm or more from a flat state. The exterior of the secondary battery can be repeatedly deformed within a range of a curvature radius of 30 mm or more. The film used is made up of one or two sheets, and the secondary battery has a laminate structure. If the cross section of the battery is curved to make it an arc, the structure will be sandwiched between two curved surfaces of the film. The curved surface of the film is cut at a cross section and the curvature is approximated to a circle, and the radius of that circle is the curvature. The radius of curvature is called the radius of curvature, and the reciprocal of the radius of curvature is called the curvature. The shape is not limited to a circular arc, and may be a shape having a part of a circular arc, for example, a wavy shape or an S-shape. And so on.

[0031] Another embodiment of the present invention disclosed in this specification is an electronic device equipped with the secondary battery. .

[0032] In addition, wearable devices include wearable cameras, wearable microphones, Wearable input devices such as wearable sensors, wearable displays, and wearable Wearable output devices such as speakers and wearable input devices that combine these functions Also, wearable devices include devices that control each device, calculate data, or This includes a device that performs processing, typically a wearable computer with a CPU. A wearable device is a device that stores, transmits, and receives data. This also includes portable information terminals and memory. [Brief description of the drawings]

[0033] [Figure 1] FIG. 1 is a cross-sectional view showing one embodiment of the present invention. [Diagram 2] FIG. 1 is a cross-sectional view showing one embodiment of the present invention. [Diagram 3] FIG. 1 is a cross-sectional view showing one embodiment of the present invention. [Figure 4] FIG. 1 is a cross-sectional view showing one embodiment of the present invention. [Diagram 5] FIG. 1 is a cross-sectional view showing one embodiment of the present invention. [Figure 6] FIG. 1 is a top view illustrating one embodiment of the present invention. [Figure 7] FIG. 1 illustrates one embodiment of the present invention. [Figure 8] FIG. 1 is a top view illustrating one embodiment of the present invention. [Figure 9] FIG. 1 is a perspective view illustrating one embodiment of the present invention. [Figure 10] FIG. 1 is a perspective view illustrating one embodiment of the present invention. [Figure 11] FIG. 1 is a top view illustrating one embodiment of the present invention. [Figure 12] 1 is a cross-sectional view illustrating an electronic device according to one embodiment of the present invention. [Figure 13] 1A and 1B are diagrams illustrating an electronic device having a flexible secondary battery. [Figure 14] FIG. 1 is a diagram illustrating a vehicle having a secondary battery. [Figure 15] 1 is an external perspective view of an electronic device illustrating one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following description, and various modifications in form and details are possible by those skilled in the art. The present invention is not limited to the description of the following embodiments. It is not something that can be done.

[0035] "Electrically connected" means connected via "something that has some kind of electrical effect." Here, "something that has some electrical effect" means an electrical signal between connected objects. There are no particular restrictions as long as it allows the exchange of numbers.

[0036] The position, size, range, etc. of each component shown in the drawings are not necessarily the actual size for ease of understanding. Therefore, the disclosed invention may not necessarily represent the position, size, range, etc. Furthermore, the present invention is not limited to the position, size, range, etc. disclosed in the drawings, etc.

[0037] Ordinal numbers such as "first," "second," and "third" are used to avoid confusion of components. It is.

[0038] (Embodiment 1) Wearable devices have the ability to change shape to fit the user's body shape, This allows the wearer to wear the device more comfortably. In recent years, deformable displays (flexible displays) have been proposed. Considering the use of wearable devices, not only displays but also other components The device and battery also need to be deformable.

[0039] Lithium-ion secondary batteries, which have high capacity and can be made small, are becoming increasingly popular as secondary batteries for wearable devices. Lithium-ion secondary batteries are also considered to be the leading candidate for lithium-ion batteries. Lithium salts, such as LiPF6, undergo hydrolysis in the presence of moisture, generating hydrofluoric acid. Therefore, the multi-layer film used as the exterior material prevents moisture from penetrating into the battery. The function of the present invention is to prevent the occurrence of heat and moisture. Mostly.

[0040] In a deformable secondary battery, repeated deformation can cause creases in this metal layer. These creases do not disappear even when the material is returned to its original shape, and they can be easily removed during subsequent deformations. As a result, the load is concentrated at the fold, Sometimes it would break from that part.

[0041] Therefore, in one aspect of the present invention, a multilayer film that can be used as an exterior material for a secondary battery is provided. The multilayer film is made of at least a metal layer and a resin layer laminated together. The resin constituting the oil layer has a durometer hardness of A90 or less, preferably A60 or less. In addition, a material that does not break even when stretched 150% in one direction is preferable. Preferably, the material will not break even if it is stretched by 200%. Furthermore, the thickness is 1 00μm or more and 5mm or less, preferably 500μm or more and 3mm or less. It is more preferable that the metal layer and the resin layer are laminated in contact with each other, but there is no need to interpose another layer therebetween. In addition, other layers may be laminated on the material. As the material, for example, a silicone resin is suitable.

[0042] In addition, the multilayer film has a thickness of 100 μm or more and 5 mm or less throughout, for example. Preferably, the thickness is 500 μm or more and 3 mm or less. The embodiment is not limited thereto. For example, the multilayer film may have a thickness of at least has an area of ​​100 μm or more and 5 mm or less, preferably 500 μm or more and 3 mm or less. Alternatively, the multilayer film may desirably have a thickness of 50% or more of the multilayer film. More preferably, the thickness of the multilayer film is 100% or more in 90% or more of the region. The area may be 500 μm or more and 5 mm or less, preferably 500 μm or more and 3 mm or less. stomach.

[0043] The resin layer may be provided in a single layer or in a plurality of layers. In this case, forming multiple resin layers so as to sandwich a metal layer will make it more difficult for creases to form. This is a preferred configuration.

[0044] A multilayer film having such a structure is less likely to develop creases in the metal layer even when repeatedly deformed. This prevents the concentration of load caused by repeated bending. By using it as an exterior material for a battery, a highly reliable secondary battery can be provided.

[0045] The metal layer may be a thin metal film such as aluminum, stainless steel, or nickel steel. Aluminum is particularly suitable for this purpose as it is easy to handle. Furthermore, it has excellent malleability and does not easily develop pinholes. Since it is difficult to obtain a high-temperature alloy, it is preferable to use aluminum containing 0.5 to 2.0 (wt%) of iron. In addition, the aluminum film is preferable because it has high resistance to electrolyte and hydrofluoric acid (resistance to corrosion). In addition to the degreasing treatment, hot water denaturation treatment, anodizing treatment, chemical conversion treatment, etc. Corrosion resistance can also be improved by applying treatments and coatings. By carrying out the above steps, a corrosion-resistant layer may be formed in contact with the metal layer. A layer of a highly conductive material may be attached to the metal layer using an adhesive. The unevenness may be formed by embossing or the like.

[0046] When the multilayer film is used as an exterior material for a secondary battery, the inside of the film that contacts the cell of the secondary battery and the On one surface, a heat seal layer is provided for sealing by heat sealing. The heat seal layer is preferably made of a material such as polyethylene or polypropylene. Polyolefin resins such as propylene can be used.

[0047] In addition to these layers, a base layer is provided to improve heat resistance and suppress the occurrence of pinholes. The base layer may be a film made of polyester, polyamide, or polypropylene. It is preferable to use a stretched polyamide film or a stretched polyester film. It is preferable that the layer is made of film.

[0048] The layers may be bonded together via an adhesive layer. Film materials, heat-curing adhesives, or light-curing adhesives such as anaerobic adhesives and UV-curing adhesives. Adhesives such as epoxy adhesives and reactive curing adhesives can be used. Resin, acrylic resin, silicone resin, phenolic resin, etc. can be used. The lamination methods include dry lamination, extrusion lamination, and hot melt lamination. A preferred example is a polyurethane-based two-component hardener. A chemically-curable adhesive or the like may be used, and dry lamination may be used.

[0049] 1 to 5 are schematic diagrams showing a multilayer film 10 according to one embodiment of the present invention.

[0050] FIG. 1(A) shows a multilayer film 10 having a structure in which a resin layer 211 is laminated on a metal layer 212. The resin layer 211 can be formed by a coating method. In this case, the viscosity of the resin to be applied may be adjusted or the resin may be applied repeatedly. A metal layer 212 is formed on the resin layer 211 by deposition or sputtering. It is also possible to manufacture the

[0051] FIG. 1B shows a multilayer film 1 in which a metal layer 212 and a resin layer 211 are bonded with an adhesive layer 213. The adhesive layer 213 is used to form a multi-layer film by various lamination methods. Film 10 can be produced.

[0052] FIG. 1C shows a structure in which a resin layer 211 and a second resin layer 216 are provided on both sides of a metal layer 212. This makes it possible to obtain a multilayer film 10 that is even more resistant to bending. FIG. 1D shows a resin layer 211 and a second resin layer 216 bonded to each other by adhesive layers 213 and 219. The multi-layer film 10 having this structure is formed by laminating the It can be easily produced by the above method.

[0053] FIG. 2(A) shows a multi-layer film 10 having the structure shown in FIG. 1(A) to which a heat seal layer 215 is bonded. The structure of the multilayer film 10 laminated using the adhesive layer 214 is shown. Also, FIG. 2(B) The heat seal layer 215 and the adhesive layer 214 are applied to the multi-layer film having the structure shown in FIG. 1(C). The figure shows the structure of the multi-layer film 10 laminated using the heat seal layer 215. This makes it possible to easily manufacture a bag-shaped exterior body by thermocompression bonding, and it is suitable as an exterior material for a secondary battery. It can be suitably used.

[0054] FIG. 2(C) shows the metal layer 212 and the resin layer 21 of the multilayer film 10 having the structure shown in FIG. 2(A). 3A shows a configuration in which a base layer 217 is provided between the substrate 211 and the substrate 212. Also, FIG. 3A shows a configuration in which the substrate 211 has the configuration of FIG. The multi-layer film 10 has a structure in which a base layer 217 is provided between a metal layer 212 and a resin layer 211. The base material layer 217 may be laminated on the metal layer 212 using an adhesive layer 218. FIG. 3B shows a multi-layer film 10 having the structure shown in FIG. 2A, in which a base material layer 21 is formed on a resin layer 211. FIG. 3(C) shows the resin of the multi-layer film 10 having the structure shown in FIG. 2(B). The base layer 217 is provided on the resin layer 211. Layer 218 may be used for lamination.

[0055] 4 and 5 show the resin layer 211 and the second resin layer 212 of the multilayer film 10 shown in FIGS. 4(A) to (C) are examples of the structure in which the layer 216 is laminated using the adhesive layer a. 5(A) to (C) correspond to FIGS. 3(A) to (C), respectively.

[0056] As described above, the multilayer film according to one embodiment of the present invention may have a variety of configurations, and may have various configurations other than those shown in the drawings. A laminate structure having a metal layer and a resin layer that satisfies the above requirements can be obtained. This can prevent the occurrence of creases in the metal layer due to bending.

[0057] The detailed configuration and materials of the elements constituting the multilayer film 10 are described above. As is clear.

[0058] In addition, the adhesive layers 214, 218, 219, and a are not necessarily formed. It's fine without it.

[0059] In this embodiment, an example of manufacturing a lithium ion secondary battery using the above-mentioned multilayer film will be described. show.

[0060] First, a multi-layer film having a heat seal layer 215 as shown in FIG. 6 is prepared by cutting the film 10 shown in FIG.

[0061] Next, film 10 is folded along the dotted lines to obtain the state shown in FIG. 7(A).

[0062] As shown in FIG. 7(B), the secondary battery is made up of a positive electrode current collector 12, a positive electrode active material, a separator, and a A laminate of a positive electrode current collector 13, a negative electrode active material, and a negative electrode current collector 14 is prepared. The current collectors such as the negative electrode current collector 14 and the negative electrode current collector 2 are preferably made of gold, platinum, zinc, iron, nickel, copper, aluminum, etc. Conductive materials include metals such as aluminum, titanium, and tantalum, and their alloys, such as stainless steel. A material that has high electrical conductivity, does not form an alloy with carrier ions such as lithium, and has a high potential during charging and discharging. Materials that do not melt can be used. Silicon, titanium, neodymium, scandium, etc. The aluminum alloy contains elements such as tungsten and molybdenum that improve heat resistance. It can also be formed from a metal element that reacts with silicon to form a silicide. Metal elements that react with silicon to form silicide include zirconium, titanium, and , hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, Cobalt, nickel, etc. Current collectors are available in foil, plate (sheet), mesh, and cylinder shapes. Shapes such as coil, punched metal, and expanded metal can be used as appropriate. It is advisable to use a current collector having a thickness of 10 μm or more and 30 μm or less. For the sake of simplicity, the laminated assembly of a positive electrode current collector 12, a separator 13, and a negative electrode current collector 14 is shown. We have shown an example of combining the two and storing them in an exterior body, but in order to increase the capacity of the secondary battery, A plurality of such combinations may be stacked and housed in an exterior body.

[0063] Then, two lead electrodes 16 having a sealing layer 15 shown in FIG. 7(C) are prepared for the positive and negative electrodes. The lead electrodes 16 are also called lead terminals, and are connected to the positive or negative electrodes of the secondary battery via an exterior filter. It is provided to pull the device out to the outside of the system.

[0064] Then, one lead electrode and the protruding portion of the positive electrode current collector 12 are electrically connected by ultrasonic welding or the like. Then, the other lead electrode and the protruding portion of the negative electrode current collector 14 are connected by ultrasonic welding or the like. Thus, electrical connection is established.

[0065] Then, in order to leave one side for inserting the electrolyte, two sides of the film 10 are heat-pressed. During the thermocompression bonding, the sealing layer 15 provided on the lead electrode also melts, forming a seal with the lead electrode. The film 10 is then fixed between the film 10 and the substrate 10. Then, the desired A small amount of electrolyte is dropped onto the inside of the bag-shaped film 10. Finally, the film is heat-pressed to bond the film. The remaining edge of the film is then sealed by heat compression.

[0066] In this manner, the secondary battery 40 shown in FIG. 7(D) can be fabricated.

[0067] Moreover, FIG. 7(E) shows an example of a cross section taken along the chain line AB in FIG. 7(D).

[0068] As shown in FIG. 7(E), the positive electrode current collector 12, the positive electrode active material layer 18, the separator 13, The negative electrode active material layer 19 and the negative electrode current collector 14 are laminated in this order onto the folded film 10. The ends are sealed with an adhesive layer 30, and the remaining space is filled with electrolyte 20. It has.

[0069] The positive electrode active material used in the positive electrode active material layer 18 may have an olivine type crystal structure, a layered rock salt type crystal structure, or the like. Examples of the positive electrode active material include composite oxides having a crystalline structure, a crystalline structure of a sintered body, or a spinel-type crystalline structure. For example, LiFeO2, LiCoO2, LiNiO2, LiMn2O4, V2O5, Cr2 Compounds such as O5 and MnO2 are used.

[0070] Or, a composite material (general formula LiMPO4 (where M is Fe(II), Mn(II), Co(I Representative examples of the general formula LiMPO4 include: Examples include LiFePO4, LiNiPO4, LiCoPO4, LiMnPO4, and LiFe a Ni b PO4, LiFe a Co b PO4, LiFe a Mn b PO4, LiNi a Co b PO4, LiNi a Mn b PO4 (a + b is 1 or less, 0 < a < 1, 0 < b < 1), LiF e c Ni d Co e PO4, LiFe c Ni d Mn e PO4, LiNi c Co d Mn e PO 4 (c + d + e is 1 or less, 0 < c < 1, 0 < d < 1, 0 < e < 1), LiFe f Ni g C o h Mn i PO4 (f + g + h + i is 1 or less, 0 < f < 1, 0 < g < 1, 0 < h < 1, 0 <i < 1) and other lithium compounds can be used as materials.

[0071] Or, a composite material such as the general formula Li (2-j) MSiO4 (M is one or more of Fe(II), Mn(II), Co( II), Ni(II), 0 ≦ j ≦ 2) can be used. General formula Li (2-j) MSiO4 representative examples include Li (2-j) FeSiO4, Li (2 -j) NiSiO4, Li (2-j) CoSiO4, Li (2-j) MnSiO4, Li (2-j) Fe k Ni l SiO4, Li (2-j) Fe k Co l SiO4, Li (2-j ) Fe k Mn l SiO4, Li (2-j) Ni k Co l SiO4, Li (2-j) Ni k Mn l SiO4 (k + l is 1 or less, 0 < k < 1, 0 < l < 1), Li (2-j) Fe m N i n Co q SiO4, Li (2-j) Fe m Ni n Mn q SiO4, Li (2-j) Ni m Co n Mn q SiO4 (m + n + q is 1 or less, 0 < m < 1, 0 < n < 1, 0 < q < 1) , Li (2-j) Fe r Ni s Co t Mn u SiO4 (r + s + t + u is 1 or less, 0 < r < 1, 0 < s < 1, 0 < t < 1, 0 < u < 1), etc. Lithium compounds can be used as materials and it is possible.

[0072] Also, as the positive electrode active material, A x M2(XO4)3 (A = Li, Na, Mg, M = Fe, M n, Ti, V, Nb, Al, X = S, P, Mo, W, As, Si) represented by the general formula can be used. As the NASICON type compound, Fe2(MnO4) 3, Fe2(SO4)3, Li3Fe2(PO4)3, etc. are available. Also, as the positive electrode active material , compounds represented by the general formula Li2MPO4F, Li2MP2O7, Li5MO4 (M = Fe, Mn), perovskite type fluorides such as NaFeF3, FeF3, TiS2, Mo , etc. represented by, and Metal chalcogenides (sulfides, selenides, tellurides) such as S2, reversed oxides such as LiMVO4 Oxides with spinel-type crystal structure, vanadium oxides (V2O5, V6O 13 , L Materials such as iV3O8, manganese oxide, and organic sulfur can be used.

[0073] In addition, the carrier ion is an alkali metal ion other than the lithium ion, an alkaline earth metal ion, etc. In the case of ions, instead of lithium, an alkali metal (e.g., sodium) is used as the positive electrode active material. Alkaline earth metals (e.g. calcium, strontium, barium, etc.), Alternatively, metals such as titanium, beryllium, or magnesium may be used.

[0074] The separator 13 may be made of cellulose (paper) or polypropylene with holes. An insulator such as polyethylene may be used.

[0075] The electrolyte solution uses a material having carrier ions as an electrolyte. Representative examples of electrolytes include LiPF6, LiClO4, LiAsF6, LiBF4, LiCF3SO3, Li( CF3SO2)2N, Li(C2F5SO2)2N, etc. The materials may be used alone or in any combination and ratio of two or more. .

[0076] In addition, the carrier ion is an alkali metal ion other than the lithium ion, an alkaline earth metal ion, etc. In the case of ions, an alkali metal salt is used as an electrolyte instead of lithium in the lithium salt. Metals (e.g., sodium and potassium), alkaline earth metals (e.g., calcium, thoron, barium, beryllium, or magnesium, etc., may also be used.

[0077] As the solvent for the electrolyte, a material in which carrier ions can move is used. As the solvent, an aprotic organic solvent is preferable. Representative examples of the aprotic organic solvent include: Ethylene carbonate (EC), propylene carbonate, dimethyl carbonate, Diethyl carbonate (DEC), γ-butyrolactone, acetonitrile, dimethoxyethane , tetrahydrofuran, etc., one or more of which can be used. By using a polymeric material that gels as a solvent for the electrolyte, safety against leakage, etc. is improved. In addition, it is possible to make the battery thinner and lighter. Representative polymer materials that are gelled Examples include silicone gel, acrylic gel, acrylonitrile gel, polyethylene oxide. Side, polypropylene oxide, fluorine-based polymer, etc. Also, the solvent of the electrolyte One or more ionic liquids (room-temperature molten salts) that are flame-retardant and non-volatile are used. Even if the internal temperature of the battery rises due to an internal short circuit or overcharging, the battery will not explode or catch fire. Ionic liquids are salts in a fluid state, and have high ion mobility. The ionic liquid contains cations and anions. For this purpose, ionic liquids containing the ethylmethylimidazolium (EMI) cation or N-methyl Tyl-N-propylpiperidinium (PP 13 ) cation-containing ionic liquids.

[0078] In addition, instead of the electrolyte, solid electrolytes containing inorganic materials such as sulfides and oxides, and P A solid electrolyte containing a polymer material such as EO (polyethylene oxide) can be used. When using a solid electrolyte, it may be possible to eliminate the need for separators and spacers. In addition, because the entire battery can be solidified, the risk of leakage is reduced and safety is improved dramatically. To rise.

[0079] The negative electrode active material of the negative electrode active material layer 19 may be formed by dissolving and depositing lithium or by depositing lithium ion. Materials that allow insertion and desorption of ions can be used, such as lithium metal, carbon-based materials, and alloy-based materials. Materials, etc. can be used.

[0080] Lithium metal has a low redox potential (-3.045 V vs. the standard hydrogen electrode) and is lightweight and and high specific capacity per volume (3860mAh / g and 2062mAh / cm, respectively). 3 ), so it is preferable.

[0081] Carbon-based materials include graphite, graphitizable carbon (soft carbon), and non-graphitizable carbon (hard carbon). Examples of nanofibers include graphene, carbon nanotubes, graphene, and carbon black.

[0082] Graphite includes mesocarbon microbeads (MCMB), coke-based artificial graphite, and pitch. These include artificial graphite such as spheroidized artificial graphite, and natural graphite such as spheroidized natural graphite.

[0083] When lithium ions are inserted into graphite (when lithium-graphite intercalation compounds are formed), It shows a low potential similar to that of lithium metal (0.1 to 0.3 V vs. Li / Li + ). This allows the lithium-ion secondary battery to exhibit a high operating voltage. has a relatively high capacity per unit volume, small volume expansion, is inexpensive, and is lithium metal. This is preferable because it has the advantage of being safer than the above.

[0084] As a negative electrode active material, it is possible to carry out charge / discharge reactions by alloying / de-alloying reactions with lithium. A suitable alloy material or oxide can also be used. In some cases, for example, Al, Si, Ge, Sn, Pb, Sb, Bi, Ag, Au, Zn, Cd There are materials that contain at least one of the elements In, Ga, etc. The capacity is large, and silicon in particular has a theoretical capacity of 4200mAh / g, which is dramatically high. In particular, it is preferable to use silicon as the negative electrode active material. Examples of such materials include Mg2Si, Mg2Ge, SnO, SnO2, Mg2Sn, and SnS2. V2Sn3, FeSn2, CoSn2, Ni3Sn2, Cu6Sn5, Ag3Sn, Ag 3Sb, Ni2MnSb, CeSb3, LaSn3, La3Co2Sn7, CoSb3, Examples include InSb and SbSn.

[0085] In addition, the negative electrode active material is SiO, titanium dioxide (TiO2), lithium titanium oxide ( Li4Ti5O 12 ), lithium-graphite intercalation compound, (Li x C6), niobium pentoxide (N The oxides used are b2O5), tungsten oxide (WO2), molybdenum oxide (MoO2), etc. There can be.

[0086] In addition, the negative electrode active material is a composite nitride of lithium and transition metals, which has a Li3N structure. Li 3-x M x N (M=Co, Ni, Cu) can be used. For example, Li 2.6 Co 0.4 N3 has a large charge / discharge capacity (900mAh / g, 1890mAh / cm 3 ) And preferable.

[0087] When a composite nitride of lithium and transition metals is used, the negative electrode active material contains lithium ions, The positive electrode active material is made of V2O5, Cr3O8, etc., which do not contain lithium ions. It is preferable that the positive electrode active material contains lithium ions. The lithium ions contained in the positive electrode active material are first removed to form the negative electrode active material. As the lithium-transition metal nitride, a complex nitride of lithium and a transition metal can be used.

[0088] In addition, a material that undergoes a conversion reaction can also be used as the negative electrode active material. For example, Lithium oxide (LiO), cobalt oxide (CoO), nickel oxide (NiO), iron oxide (FeO), etc. A transition metal oxide that does not undergo an alloying reaction with the negative electrode active material may be used. Further materials in which the reaction occurs include Fe2O3, CuO, Cu2O, RuO2, and Cr2O. 3rd order oxide, CoS 0.89 , NiS, CuS and other sulfides, Zn3N2, Cu3N, G Nitrides such as e3N4, phosphides such as NiP2, FeP2, CoP3, FeF3, BiF3 This also occurs with fluorides such as those mentioned above. Since the electric potential of the above fluorides is high, they are not used as positive electrode active materials. This is also fine.

[0089] In addition to the above-mentioned negative electrode active material, the negative electrode active material layer 19 contains a material for improving the adhesion of the active material. The negative electrode active material layer 19 may contain a binder, a conductive assistant for increasing the conductivity of the negative electrode active material layer 19, and the like. stomach.

[0090] The secondary battery is configured such that, for example, the thickness of the separator 13 is about 25 μm, the positive electrode current collector 12 is about 0 μm or more and about 40 μm or less, the positive electrode active material layer 18 is about 100 μm, and the negative electrode active material layer 19 is about 1 The thickness of the film 10 is about 20 μm or more and about 40 μm or less. The thickness of the adhesive layer 30 is 0.6 mm. Note that the adhesive layer 30 is only partially shown in FIG. However, a layer made of polypropylene is provided on the surface of the film 10 and is heat-pressed. Only the portion becomes the adhesive layer 30.

[0091] FIG. 7(E) shows an example in which the lower side of the film 10 is fixed and pressed. In the case of , the upper side is bent significantly and a step is formed, so that When multiple combinations of the above laminations are provided, for example, eight or more, the step becomes large. , the upper film 10 may be subjected to too much stress. In that case, the edge of the film may become misaligned with the edge of the lower film. To prevent misalignment, a step is also provided on the lower film, and the center is aligned so that the stress is uniform. It may be configured to be crimped with.

[0092] Here, the flow of current during charging of a secondary battery will be explained using FIG. 7(F). When a secondary battery is considered as a closed circuit, the movement of lithium ions and the flow of electric current are in the same direction. In secondary batteries that use lithium, the anode and cathode are charged and discharged. (cathode) is switched, and the oxidation and reduction reactions are switched, so the reaction potential The electrode with the higher reaction potential is called the positive electrode, and the electrode with the lower reaction potential is called the negative electrode. In this case, even if the battery is charging, discharging, or applying a reverse pulse current, Even when an electric current flows through it, the positive electrode is called the "positive electrode" or "+ electrode (plus electrode)" and the negative electrode is The negative electrode is called the "negative electrode" or "-electrode (minus electrode)". When the terms anode (positive electrode) and cathode (negative electrode) are used, the following occurs during charging and discharging: This can be confusing because the anode and cathode are the opposite. The term "cathode" is not used in this specification. When using the terms cathode and positive electrode, specify whether they are charging or discharging. It will also be indicated whether it corresponds to a positive pole (positive pole) or a negative pole (negative pole).

[0093] A charger is connected to the two terminals shown in FIG. 7(F) to charge the secondary battery 40. As the charging of the secondary battery 40 progresses, the potential difference between the electrodes increases. The current flows from the external terminal toward the positive electrode current collector 12, and then flows through the positive electrode current collector 12 in the secondary battery 40. 2 to the negative electrode current collector 14, and then flows from the negative electrode to the external terminal of the secondary battery 40. The direction of the positive current is defined as the positive direction. In other words, the direction of the charging current is defined as the positive direction.

[0094] In this embodiment, an example of a small battery for use in a portable information terminal or the like is shown, but the present invention is not limited thereto. The present invention can be applied not only to small batteries but also to large batteries to be mounted on vehicles, etc.

[0095] In the present embodiment, an example in which the present invention is applied to a lithium ion secondary battery has been shown. One embodiment of the present invention is not limited to this. Various secondary batteries, for example, lead acid batteries, lithium ion batteries, Polymer secondary battery, nickel-metal hydride battery, nickel-cadmium battery, nickel- Suitable for iron batteries, nickel-zinc batteries, silver oxide-zinc batteries, solid-state batteries, air batteries, etc. Alternatively, the present invention can be applied to various power storage devices, for example. It can also be applied to primary batteries, capacitors, lithium ion capacitors, etc. In addition, solar cells, optical sensors, touch sensors, display devices, FPCs (flexible prints) Substrates), optical films (polarizing plates, retardation plates, prism sheets, light reflecting sheets, light diffusing sheets It is also possible to apply this to other applications such as

[0096] (Embodiment 2) In this embodiment, a laminated combination different from that in the first embodiment is formed between the folded film 10. An example of storing multiple combinations is shown below.

[0097] FIG. 8(A) shows a positive electrode current collector 12, FIG. 8(B) shows a negative electrode current collector 14, and FIG. 8(C) shows a separator 1 3, FIG. 8(D) shows a top view of the lead electrode 16, and FIG. 8(E) shows a top view of the film 10. .

[0098] In FIG. 8, the dimensions are approximately equal, and the area 21 surrounded by the dashed line in FIG. The dimensions of the separator are almost the same as those of the separator shown in FIG. 8(C). Also, the distance between the dotted line and the end face in FIG. This region becomes the thermocompression bonding region 17 .

[0099] FIG. 9(A) shows a perspective view of two combinations. In this example, a positive electrode active material layer is provided on the negative electrode current collector 14. a positive electrode active material layer, a separator 13, a positive electrode current collector 12, a positive electrode active material layer, a separator, a negative The electrode active material layer and the negative electrode current collector are arranged in this order. In the example shown in the figure, one separator is folded and a positive electrode current collector 1 is inserted between the folded separator. It is also possible to configure the structure to accommodate 2.

[0100] In addition, it is possible to provide a negative electrode active material layer on both sides of the negative electrode current collector. A negative electrode current collector having a negative electrode active material layer on only one side is placed between two negative electrode current collectors having a negative electrode active material layer on both sides. Three negative electrode current collectors, four positive electrode current collectors with positive electrode active material layers on both sides, and eight separators 1 shows an example of a secondary battery having a capacitor sandwiched therebetween.

[0101] When stacking in this way, if all four positive electrode collectors are fixed and electrically connected, In addition to the four positive electrode collectors, the lead electrodes are also bonded to the electrodes by ultrasonic welding. By overlapping the pieces and performing ultrasonic welding, electrical connection can be made efficiently.

[0102] The protruding part of the positive electrode current collector is also called the tab part, and this part is overlapped with the tab part of another positive electrode current collector and pressed. Ultrasonic welding can be performed by applying ultrasonic vibrations while applying force.

[0103] In addition, the tabs may crack or break due to stress caused by external force applied after the secondary battery is manufactured. This is likely to be a point where a break occurs.

[0104] Therefore, in this embodiment, an ultrasonic welding apparatus having a bonding die shown in FIG. In FIG. 10(A), for the sake of simplicity, the upper and lower buttons of the ultrasonic welding device are shown. Only the bonding die is shown.

[0105] Between a first bonding die 22 having a protrusion 24 and a second bonding die 23 Then, the tabs of the four positive electrode collectors and the lead electrodes are arranged. The areas to be welded overlap the protrusions 24. When pressure is applied, the weld area becomes as shown in Figure 10(B). A curved portion 25 is formed between the region 26 and the region of the tab portion protruding from the end of the separator 13. can.

[0106] By providing this curved portion 25, the secondary battery can be prevented from being damaged by external force applied thereto after the secondary battery is manufactured. Stress can be relieved.

[0107] In addition, the ultrasonic welding apparatus having the bonding die shown in FIG. 10(A) can perform the same ultrasonic welding as the ultrasonic welding. Since the above steps can be performed simultaneously, a secondary battery can be produced without increasing the number of steps. Also, ultrasonic welding and the formation of the curved portion 25 may be performed separately.

[0108] The tabs of the five negative electrode current collectors were also welded in the same manner as above, and the electrical connections were then secured. Connect to.

[0109] In addition, the present invention is not limited to forming the curved portion 25 on the tab portion, and the shape of the tab portion of the positive electrode current collector may be modified. The stress can also be relieved by improving the

[0110] For example, FIG. 11(A) shows an example of a top view of the positive electrode current collector 12a. A slit 27 is provided in the tab portion of the current collector 12a, and after the secondary battery is fabricated, an external force is applied from the outside. The structure may be such that the generated stress is alleviated.

[0111] As another example, an example of a top view of the positive electrode current collector 12b is shown in FIG. A positive electrode current collector in which the corners of the area 28 enclosed by the dotted line of the tab portion of the current collector 12b are rounded to reduce stress concentration. The corners of the region 28 are rounded to have a larger radius of curvature than the other corners. It is preferable that the shape of the slit is shaped like this.

[0112] In another example, the material of the positive electrode current collector is a strong material such as stainless steel, and the positive electrode By making the thickness of the current collector 10 μm or less, the secondary battery can be easily fabricated without any damage caused by external force. The structure may be such that the stress caused by the slit is relieved.

[0113] Of course, it goes without saying that a plurality of these may be combined to reduce the stress concentration in the tab portion. stomach.

[0114] This embodiment can be combined with the first embodiment.

[0115] (Embodiment 3) In this embodiment, a lithium ion battery obtained by using either one of the embodiments 1 or 2 is used. An example of an electronic device incorporating a secondary battery is shown.

[0116] The secondary battery obtained by using the first or second embodiment has a thin and flexible film as an exterior body. The support structure is attached to the support structure having a curved surface, and the support structure is curved in a region having a large radius of curvature. It can be deformed to follow the surface part.

[0117] In the above configuration, the exterior body of the secondary battery preferably has a curvature radius of 10 mm or more from a flat state. The secondary battery's exterior can be repeatedly deformed within a range of a curvature radius of 30 mm or more. It is a secondary battery with a laminate structure consisting of one or two of the above multilayer films. In this case, if the cross section of the battery is curved to be an arc, it will be sandwiched between two curved surfaces of the film. The curve of the film's curved surface is cut at a cross section and the curvature is approximated to a circle. The radius of the circle is The curvature radius is called the curvature, and the reciprocal of the curvature radius is called the curvature. The shape is not limited to a pure arc shape, and may be a shape having a part of an arc, such as a wave shape or an S-shape. It can also be a shape.

[0118] Next, a display module to be attached onto the secondary battery is prepared. Both refer to a display panel with an FPC attached. Figure 12 shows a cross section of an electronic device. The electronic device shown in FIG. 12 has a display unit 102, an FPC, and a driving circuit. It is preferable to provide a converter for supplying power from a secondary battery 103 to the support structure 1. The shape of the support structure 101 is a bracelet made by bending a belt-like structure. A part of the wristwatch is flexible, and the wristwatch can be fitted to the wrist by moving it in the direction of the arrow 105. It is possible.

[0119] The display module has a display unit 102 that is flexible and has a display element on a flexible film. In addition, it is preferable to arrange the secondary battery 103 and the display unit 102 in a position where they partially overlap each other. By arranging them in a position where they overlap partially or completely, the distance from the secondary battery 103 to the display unit is The power path is shortened, i.e., the wiring distance is shortened, thereby reducing power consumption.

[0120] The electronic device shown in FIG. 12 includes a support structure 101, a secondary battery 103, and a control board (not shown). 10, a display unit 102, and a cover 104. Specifically, the secondary battery 10 is mounted on the support structure 101. 3, a control board is provided on the secondary battery 103, a display unit 102 and a cover are provided on the control board. The electronic device also has an antenna (not shown) for wireless charging. ) and can be charged wirelessly.

[0121] In addition, the support structure 101 has flexibility. Therefore, the support structure 101 can be easily bent. It is possible to use a material other than plastic as the support structure 101. It is also possible.

[0122] The control board has a slit for bending, and is used to mount a communication device, a microcomputer, a storage device, an FPGA, It is configured with a DA converter, a charge control IC, a level shifter, etc. The board connects to a display module having a display unit 102 via an input / output connector.

[0123] In addition, a touch panel is mounted on the display unit 102, and information can be input to the electronic device through the touch panel. Alternatively, the device may be configured to be capable of performing operations such as the above.

[0124] As a method for producing a display element on a flexible film, There are two methods: directly fabricating a display element on a substrate, and fabricating a display element on a substrate with rigidity such as a glass substrate. After forming the layer containing the display element, the substrate is removed by etching or polishing. A method of bonding a flexible film to a layer of the material, or a method of bonding a rigid substrate such as a glass substrate A peeling layer is provided on the display device, and a layer including a display element is formed thereon. After that, the peeling layer is used to form a rigid substrate. The layer including the display element is separated from the substrate, and the layer including the display element and a flexible film are There are ways to glue it on.

[0125] Another example of electronic equipment is shown in FIG.

[0126] As an example of an electronic device that uses a flexible power storage device, there is a head-mounted Display devices such as TVs, television sets, and goggle-type displays receivers), computer monitors, digital cameras, digital video cameras digital photo frames; mobile phones (also called mobile phones or mobile phone devices); Examples include game machines, mobile information terminals, audio playback devices, and large game machines such as pachinko machines. do.

[0127] In addition, the flexible energy storage device can be mounted on the inner or outer walls of a house or building, or on the inside or outside of a car. It is also possible to incorporate it along the curved surfaces of the interior or exterior of the vehicle.

[0128] FIG. 13A shows an example of a mobile phone. A mobile phone 7400 includes a housing 7401. In addition to the display unit 7402, operation buttons 7403, an external connection port 7404, The mobile phone 7400 is equipped with a speaker 7405, a microphone 7406, and the like. It has device 7407.

[0129] FIG. 13B shows the mobile phone 7400 in a curved state. When the 0 is deformed by an external force and curved as a whole, the storage device installed inside The bent power storage device 7407 is also bent. The power storage device 7407 is a laminated storage battery (also called a film-covered battery). The power storage device 7407 is fixed in a bent state. 7 has a lead electrode 7408 electrically connected to a current collector 7409. The film of the exterior body of the power storage device 7407 is embossed, and the power storage device 7407 is bent. This configuration is highly reliable even when the power supply is turned on.

[0130] FIG. 13D shows an example of a bangle-type mobile phone. 7101, a display unit 7102, operation buttons 7103, and a power storage device 7104. FIG. 13E illustrates a state of the power storage device 7104 that can be bent. When the power storage device 7104 is worn on the user's arm, the housing is deformed and the curvature of part or the whole of the power storage device 7104 becomes Specifically, the radius of curvature of the housing or storage device is within the range of 10 mm to 150 mm. The curvature of a part or the whole of the main surface of the power storage device 7104 changes. When the power storage device 7104 is formed using the multilayer film of one embodiment of the present invention, the power storage device 7104 can be bent. The power storage device 710 has a configuration that can maintain high reliability even if it is used many times. 4 has a lead electrode 7105 electrically connected to a current collector 7106 .

[0131] In addition, by installing a bendable power storage device in a vehicle, it is possible to Next-generation clean energy vehicles such as electric vehicles (EV) and plug-in hybrid vehicles (PHEV) This makes it possible to realize high-energy automobiles.

[0132] FIG. 14 illustrates an example of a vehicle using one embodiment of the present invention. 100 is an electric vehicle that uses an electric motor as a power source for running; or A hybrid vehicle that can select between an electric motor and an engine as a power source for driving. When installing a laminated secondary battery in a vehicle, multiple laminates are used. A battery module that integrates rechargeable batteries with a nate structure is installed in one or more locations. By using one embodiment of the present invention, the power storage device itself can be made smaller and lighter. For example, a curved battery device can be installed on the inside of the tire to realize a vehicle with a long driving range. In addition, the power storage devices can be arranged in various shapes in the gaps between the vehicles, and the trunk can be easily stored. The vehicle 8100 can secure a space for storing electricity and a passenger space inside the vehicle. The energy storage device not only drives the electric motor, but also powers the headlights8101 and room lights. The light emitting device can be powered by a light emitting device such as a light source (not shown).

[0133] In addition, the power storage device may be used for displaying information such as a speedometer and a tachometer of the automobile 8100. The power storage device can supply power to the navigation device of the automobile 8100. The present invention can provide power to semiconductor devices such as power distribution systems.

[0134] The automobile 8200 shown in FIG. 14B is a power storage device of the automobile 8200. The device can be charged by receiving power from an external charging facility using a contactless charging method or other methods. FIG. 14B shows a diagram of a charging device 8021 installed on the ground and a storage device 8200 installed in the vehicle. The charging device is shown being charged via a cable 8022. The charging method and connector standards can be set appropriately according to a given method such as CHAdeMO or Combo. The device 8021 may be a charging station installed in a commercial facility, or may be a home power source. For example, the automobile 8200 may be powered by an external power supply using plug-in technology. The battery 8024 mounted on the vehicle can be charged. Charging is performed using an AC / DC converter, etc. This can be achieved by converting AC power to DC power via a converter.

[0135] Although not shown, a power receiving device is mounted on the vehicle and receives power from a ground power transmitting device in a non-contact manner. In this non-contact power supply method, a power transmission device is installed on the road or exterior wall. By incorporating this technology, charging can be done not only when the vehicle is stopped but also while it is moving. Using this method, power can be transmitted between two vehicles. A solar cell may be provided in the storage unit to charge the power storage device when the vehicle is stopped or traveling. To supply power through contact, an electromagnetic induction method or a magnetic resonance method can be used.

[0136] According to one aspect of the present invention, the degree of freedom in the installation location of the power storage device is increased, and vehicle design can be made more efficient. Furthermore, according to one embodiment of the present invention, the characteristics of a power storage device can be improved. Therefore, the power storage device itself can be made smaller and lighter. If possible, this would contribute to reducing the weight of the vehicle, which would improve the cruising range. The electric storage device installed in the vehicle can be used as a power supply source for other purposes besides the vehicle. This allows avoiding the use of commercial power during peak power demand periods.

[0137] This embodiment mode can be freely combined with embodiment mode 1 or 2.

[0138] (Embodiment 4) Another example of an electronic device that uses a power storage device is a medical electronic device that can collect biological information. Here is an example.

[0139] The electronic device 60 in FIG. 15 has one or more sensors in a housing 61, and detects force, displacement, Position, speed, acceleration, angular velocity, rotation speed, distance, light, liquid, magnetism, temperature, chemical substances, sound, time temperature, hardness, electric field, current, voltage, power, radiation, flow rate, humidity, gradient, vibration, odor or infrared The sensor 63a and the sensor 63b can be provided with a function of measuring the line. For example, data indicating the environment in which the power storage device is placed (such as temperature) is detected and stored. The information can be stored in the circuit 64. FIG. 15A shows a display unit 62 in the housing 61. The display unit 62 is an example of a bracelet-type electronic device having a touch input sensor, and FIG. showed an example of a ring-type electronic device that does not have a display unit.

[0140] For example, a light source such as an LED is provided in the electronic device 60, and light from the light source is superimposed on the electronic device 60. The light is shone onto the skin, and changes in blood flow are measured from the light reflected from inside the skin, and calculations are performed to determine the Pulse data can be detected. Also, the measurement points are not one, but multiple. The electronic device 60 also measures the number of times the biometric information is acquired, and the average of the measurements is used to obtain accurate biometric information data. A circuit 65 such as a CPU capable of signal processing calculations is provided.

[0141] In addition, the electronic device 60 is equipped with a sensor that can obtain not only pulse data but also other biological information. For example, other biological information may include body temperature, blood pressure, activity level, number of steps, and blood oxygen concentration. , subcutaneous fat percentage, etc.

[0142] In addition, in FIG. 15, an electronic device having a display unit 62 is shown, but is not limited thereto. The device is equipped with a circuit 66 (including an antenna, etc.) that can transmit and receive biometric data without the need for a If the biometric data is collected, it can be displayed on other electronic devices, such as a mobile phone or smartphone. In addition, if the user who wears the electronic device 60 on their arm has a chronic illness or requires nursing care, If the patient is a patient, and if it is possible to transmit the information to a remote hospital or other medical facility, the patient can receive the information in real time from the hospital. This allows doctors in remote hospitals to provide accurate instructions on how to treat patients, etc. It can be obtained by telephone or smartphone.

[0143] In addition, if a user wearing the electronic device 60 on his / her arm develops a physical abnormality and falls on the street, The child device 60 collects current biometric information along with location information obtained by the GPS installed in the child device 60. It can also be equipped with a function that automatically contacts medical facilities in an emergency by receiving a 64-bit signal. The data stored on the card is equivalent to that on an organ donor card, along with other information such as name, age, and blood type. If the user is not conscious, a rescuer can use the electronic device 60 to You can also get the information you need about.

[0144] This embodiment mode can be freely combined with any one of the embodiment modes 1 to 3. [Explanation of symbols]

[0145] 10 Film 12 Positive electrode current collector 12a Positive electrode current collector 12b Positive electrode current collector 13 Separator 14 Negative electrode current collector 15 Sealing layer 16 Lead Electrodes 17 Thermocompression bonding area 18 Cathode active material layer 19 Negative electrode active material layer 20 Electrolyte 21 areas 22 Bonding Die 23 Bonding Die 24 protrusions 25 Curved section 26 Welding Area 27 Slit 28 areas 30 Adhesive layer 40 Secondary battery 60 Electronic equipment 61 Case 62 Display section 63a Sensor 63b Sensor 64 circuits 65 circuits 66 Transmitting and receiving circuits 101 Support structure 102 Display section 103 Secondary battery 104 Cover 105 Arrow 211 Resin layer 212 Metal layer 213 Adhesive layer 214 Adhesive layer 215 Heat seal layer 216 Second resin layer 217 Base material layer 218 Adhesive layer 219 Adhesive layer 7100 Mobile Phone 7101 Case 7102 Display section 7103 Operation button 7104 Energy storage devices 7105 Lead electrode 7106 Current collector 7400 Mobile Phone 7401 Case 7402 Display section 7403 Operation button 7404 External connection port 7405 Speaker 7406 Mike 7407 Energy storage devices 7408 Lead electrode 7409 Current collector

Claims

[Claim 1] An electronic device having a secondary battery and a housing, The secondary battery includes a multilayer film, a positive electrode, an electrolyte, and a negative electrode; the multilayer film has a first resin layer, a second resin layer, and a metal layer between the first resin layer and the second resin layer; the first resin layer is a silicone resin having a durometer hardness of A90 or less and not breaking even when stretched 150% in one direction; The first resin layer has a thickness of 100 μm or more and 5 mm or less, The second resin layer has a thickness of 100 μm or more and 5 mm or less, When the housing is curved, the secondary battery is also curved accordingly.

Images