Power storage device

Abstract

A flexible and highly reliable power storage device or light-emitting device is provided. A device having a battery unit or a light-emitting unit and a member having rubber elasticity. The battery unit has a secondary battery. The light-emitting unit has a light-emitting element. The member has a first protrusion and a second protrusion, and the first protrusion and the second protrusion are The first and second protrusions are arranged side by side on the first surface of the knit or light-emitting unit. The devices can be bent so that the first surfaces are inward, allowing them to come into contact with each other.

Description

[Technical Field]

[0001] One embodiment of the present invention relates to a power storage device, a light-emitting device, an electronic device, and a manufacturing method thereof. do.

[0002] Note that one embodiment of the present invention is not limited to the above technical field. Examples of the semiconductor device include a semiconductor device, a display device, a light-emitting device, an input / output device, a power storage device, a memory device, and an imaging device. , their driving methods, or their manufacturing methods can be cited as examples.

[0003] In this specification, the term "power storage device" refers to elements and devices in general that have a power storage function. For example, lithium-ion secondary batteries and other storage batteries (also called secondary batteries) This includes silicon ion capacitors and electric double layer capacitors. [Background technology]

[0004] In recent years, the development of wearable devices has been actively promoted. Because of the nature of being worn on the body, it has a curved shape that follows the curves of the body or that adapts to the movement of the body. Therefore, it is preferable that the power storage device and the Display devices are required to be flexible.

[0005] For example, Patent Document 1 discloses a sheet-shaped electricity storage device that can be bent in at least one axial direction. The location is disclosed.

[0006] Furthermore, display devices for wearable devices and portable equipment require thin and lightweight construction. It is required that the material be durable and resistant to damage.

[0007] Electroluminescence (hereinafter referred to as EL) Light-emitting elements (also called EL elements) that utilize the phenomenon of light emitting diodes (LEDs) are easy to make thin and lightweight. It has features such as high speed response to signals and the ability to be driven using a low voltage DC power supply. Applications to wearable devices and portable equipment are being considered.

[0008] For example, Patent Document 2 discloses a flexible light-emitting device to which an organic EL element is applied. There are. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-211262 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-197522 Summary of the Invention [Problem to be solved by the invention]

[0010] One embodiment of the present invention is to provide a flexible power storage device, a flexible light-emitting device, or a flexible electronic device. Another object of one embodiment of the present invention is to provide a power storage device, a power generation device, and a power supply device that are safe or highly reliable. Another object of the present invention is to provide an optical device or an electronic device. An object of the present invention is to provide a power storage device, a light-emitting device, or an electronic device that is less susceptible to damage. One embodiment of the present invention aims to reduce the weight or thickness of a power storage device, a light-emitting device, an electronic device, or the like. Another embodiment of the present invention is a novel power storage device, a light-emitting device, or an electronic device. One of the objects is to provide a device or a method for manufacturing the same.

[0011] The description of these problems does not preclude the existence of other problems. It is not necessary for the embodiments to solve all of these problems. It is possible to extract other problems from the description of the claim. [Means for solving the problem]

[0012] One embodiment of the present invention is a power storage device including a battery unit and a member having rubber elasticity. The member having rubber elasticity has a first convex portion and a second convex portion, and the first convex portion and the second convex portion The first and second protrusions are arranged side by side on the first surface of the battery unit. The battery unit is bent so that the first surface of the battery unit faces inward, preventing them from coming into contact with each other. It is a power storage device.

[0013] In the above configuration, the first surface and the second surface of the battery unit face each other and have rubber elasticity. Preferably, the member is located on both the first surface and the second surface of the battery unit. Furthermore, the member having rubber elasticity has a third convex portion and a fourth convex portion, and the third convex portion and The third and fourth protrusions are arranged side by side on the second surface of the battery unit, and the third and fourth protrusions The battery unit is bent so that the second surface of the battery unit faces inward, thereby preventing the battery unit from coming into contact with the second surface of the battery unit. It would be preferable if this could be done.

[0014] Another embodiment of the present invention is a power storage device including a battery unit and a member having rubber elasticity. The member having rubber elasticity has a first convex portion and a second convex portion, The second protrusions are arranged side by side on the first surface of the battery unit, and the cross-sectional shape of the first protrusions is A shape that is tangent to three sides of the first isosceles triangle and is included inside the first isosceles triangle. The cross-sectional shape of the second convex portion is in contact with three sides of the second isosceles triangle and is The first isosceles triangle and the second isosceles triangle are the same shape. The battery unit has a shape with a base on the same line and is connected at one point. When bending the battery unit so that the first surface faces inward, the radius of curvature of the first surface of the battery unit is The sum of the shortest distance from the center of the first convex portion to the base of the first convex portion and the length of the equal side of the first isosceles triangle. In this case, the first side of the first protrusion is a first isosceles triangle. The second side of the second convex portion is located on the first equilateral side of the second isosceles triangle. Preferably, the first and second equal sides are in contact at one point. The cross-sectional shapes of the convex portions may be the same.

[0015] In each of the above configurations, the member having rubber elasticity is provided on the first surface of the battery unit and on the second surface of the battery unit. and the first surface and the second surface of the battery unit are preferably opposite to each other. .

[0016] In each of the above configurations, the member having rubber elasticity has a third convex portion and a fourth convex portion, and the third The first and fourth protrusions are arranged side by side on the second surface of the battery unit, and the cross section of the third protrusion The surface shape is in contact with three sides of the third isosceles triangle and is included inside the third isosceles triangle. The cross-sectional shape of the fourth convex portion is in contact with three sides of the fourth isosceles triangle and is The shape is included inside the isosceles triangle of the third isosceles triangle and the fourth isosceles triangle. are the same shape, have the same base on the same line, and are connected at one point. When bending the battery unit so that the second surface of the battery unit faces inward, the radius of curvature of the second surface of the battery unit is the shortest distance from the second surface to the bottom surface of the third convex portion, and the length of the equal side of the third isosceles triangle; In this case, the third side of the third protrusion can be the sum of the third two sides. The fourth side of the fourth convex part is located on the third equilateral side of the equilateral triangle, and the fourth side of the fourth convex part is located on the third equilateral side of the equilateral triangle. It is preferable that the third and fourth equilateral sides are in contact at one point. The cross-sectional shapes of the protrusion and the fourth protrusion may be the same.

[0017] In each of the above configurations, it is preferable that the member having rubber elasticity houses the battery unit. .

[0018] In each of the above configurations, the power storage device is in a first state in which the first protrusion and the second protrusion do not contact each other. The first protrusion and the second protrusion can be reversibly transformed from a first state to a second state in which the first protrusion and the second protrusion are in contact with each other. It is preferable that:

[0019] In each of the above configurations, the power storage device includes a power receiving resonance coil, a power receiving coil, a rectifier circuit, and a D The power receiving resonance coil has a C-DC converter, and high frequency voltage is induced by magnetic field resonance. A high frequency voltage is induced in the receiving coil by electromagnetic induction with the receiving resonant coil, and The rectifier circuit rectifies the high-frequency voltage induced in the receiving coil, and the DC-DC converter converts the rectified It is preferable that the DC voltage output by the current circuit is input.

[0020] In particular, the DC-DC converter has an input power detection unit and a voltage conversion unit. The first DC voltage is input, and the voltage conversion unit converts the first DC voltage into a second DC voltage. The input power detection unit includes a load, a first means, and a second means, and the first means The stage detects a first voltage proportional to the first DC voltage, and the second means detects a current produced in the load. The voltage conversion unit detects a second voltage proportional to the voltage, and the voltage conversion unit has a switch and a third means. The third means controls a current generated in the load in response to switching, and the third means controls a first voltage. and a second voltage, and a switching of the switch is controlled based on the first voltage and the second voltage. It is preferable to keep the ratio of the two voltages constant.

[0021] Another embodiment of the present invention is a light-emitting device including a light-emitting unit and a member having rubber elasticity. The light emitting unit has a light emitting panel, the light emitting panel has a light emitting element, and The member having rubber elasticity houses the light emitting unit, and at least a part of the member having rubber elasticity is The member that transmits light emitted by the light emitting element and has rubber elasticity has a first convex portion and a second convex portion. The first and second protrusions are arranged side by side on the first surface of the light-emitting unit, and the light-emitting element The light-emitting element has a function of emitting light toward the second surface side of the light-emitting unit, and the first surface and the second surface of the light-emitting unit are The first and second protrusions are arranged to connect the light emitting device to the first protrusion of the light emitting unit. This is a light-emitting device in which the two surfaces can be bent inward to come into contact with each other.

[0022] In the above configuration, the light emitting unit includes a secondary battery and a circuit, and the secondary battery is connected to the light emitting element. The circuit has a function of supplying power, and the circuit has an antenna, and the circuit receives a signal from the antenna. It is preferable that the secondary battery be charged based on the power supply voltage.

[0023] In each of the above configurations, the secondary battery preferably has a portion overlapping with the light-emitting panel.

[0024] In each of the above configurations, it is preferable that the antenna has a portion that overlaps with the light-emitting panel. Furthermore, it is preferable that at least a part of the antenna is located between the light-emitting panel and the secondary battery. stomach.

[0025] In each of the above configurations, the light-emitting unit has a pressure-sensitive detection element, and the pressure-sensitive detection element is It is preferable that the light emitting element is located closer to the second surface than the light emitting element.

[0026] In each of the above configurations, a capacitance type detection element is provided, and the capacitance type detection element has rubber elasticity. The light emitted from the light emitting element is extracted to the outside through the detection element. It is preferable.

[0027] Further, one embodiment of the present invention can be applied to a display device using a display panel. In the light-emitting device having the above configuration, the light-emitting panel is replaced with a display panel to manufacture a display device. It is possible.

[0028] One embodiment of the present invention includes a light-emitting device or a display device having any of the above structures, and Extensible Printed Circuit) or TCP (Tape Carrier Modules with connectors such as COG ( Modules with ICs mounted using the Chip On Glass method, etc. is.

[0029] Furthermore, a light-emitting device, a display device, a module, or a power storage device having any of the above configurations is used. An electronic device or a lighting device using the same is also an aspect of the present invention.

[0030] For example, one embodiment of the present invention is a light-emitting device having any of the above structures, a sensor, a housing, a speaker, and a light-emitting element. The electronic device has a camera, a microphone, an operation switch, or an operation button. [Effects of the Invention]

[0031] One embodiment of the present invention provides a flexible power storage device, a flexible light-emitting device, or a flexible electronic device. Alternatively, in one embodiment of the present invention, a safe or highly reliable power storage device, a light-emitting device, or the like can be provided. In one embodiment of the present invention, a device or electronic device that is hard to break can be provided. A power storage device, a light-emitting device, or an electronic device can be provided. This allows for reduction in weight or thickness of power storage devices, light-emitting devices, electronic devices, and the like. In one embodiment of the present invention, a novel power storage device, a light-emitting device, or an electronic device, or a method for manufacturing the same, A manufacturing method can be provided.

[0032] The description of these effects does not preclude the existence of other effects. The embodiments do not necessarily have all of these effects. From the description of the section, it is possible to extract other effects. [Brief explanation of the drawings]

[0033] [Figure 1] FIG. 1 illustrates an example of a power storage device. [Figure 2] FIG. 1 illustrates an example of a power storage device. [Figure 3] FIG. 1 illustrates an example of a power storage device. [Figure 4] FIG. 1 illustrates an example of a power storage device. [Figure 5] FIG. 1 illustrates an example of a power storage device. [Figure 6] FIG. 1 illustrates an example of a power storage device. [Figure 7] FIG. 1 illustrates an example of a power storage device. [Figure 8] FIG. 1 illustrates an example of a power storage device. [Figure 9] 1A and 1B illustrate an example of a light-emitting device. [Figure 10] 1A and 1B illustrate an example of a light-emitting device. [Figure 11] 1A and 1B illustrate an example of a light-emitting device. [Figure 12] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 13] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 14] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 15] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 16] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 17] FIG. 1 is a diagram showing an example of a structure. [Figure 18] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 19] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 20] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 21] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 22] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 23] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 24] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 25] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 26] FIG. 1 is a diagram showing an example of a structure. [Figure 27] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 28] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 29] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 30] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 31] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 32] 1A and 1B illustrate an example of a power storage device and an example of an electrode. [Figure 33] FIG. 1 illustrates an example of a power storage device. [Figure 34] FIG. 1 illustrates an example of a power storage device. [Figure 35] FIG. 1 illustrates an example of a power storage device. [Figure 36] FIG. 1 illustrates an example of a power storage device. [Figure 37] FIG. 1 illustrates an example of a power storage device. [Figure 38] FIG. 1 illustrates an example of a power storage device. [Figure 39] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 40] FIG. 1 illustrates an example of a power storage device. [Figure 41] FIG. 1 illustrates an example of a power storage device. [Figure 42] 1A to 1C illustrate an example of a method for manufacturing a power storage device. [Figure 43] FIG. 1 illustrates an example of a power storage device. [Figure 44] FIG. 1 is a diagram showing an example of a power supply system and a power receiving device. [Figure 45] FIG. 1 is a diagram showing an example of a DC-DC converter. [Figure 46] FIG. 1 is a diagram showing an example of a DC-DC converter. [Figure 47] FIG. 1 is a diagram showing an example of a DC-DC converter. [Figure 48] FIG. 1 is a diagram showing an example of a light-emitting panel. [Figure 49] FIG. 1 is a diagram showing an example of a light-emitting panel. [Figure 50] FIG. 1 is a diagram showing an example of a light-emitting panel. [Figure 51] FIG. 2 is a diagram showing an example of a display panel. [Figure 52] FIG. 1 is a diagram showing an example of a liquid crystal panel. [Figure 53] 1A and 1B are diagrams illustrating examples of electronic devices. [Figure 54] 1A and 1B are diagrams illustrating examples of electronic devices. [Figure 55] 1A and 1B are diagrams illustrating examples of electronic devices. DETAILED DESCRIPTION OF THE INVENTION

[0034] The embodiments will be described in detail with reference to the drawings. However, the present invention is not limited to the following description. The present invention is not limited to the above embodiments, and various changes and modifications may be made in the form and details thereof without departing from the spirit and scope of the present invention. It will be readily understood by those skilled in the art that the present invention can be achieved by the following embodiments. It should not be construed as being limited to the contents described.

[0035] In the configuration of the invention described below, the same parts or parts having similar functions are designated by the same reference numerals. The same reference numerals are used in common among different drawings, and the repeated explanations thereof will be omitted. When referring to a function, the hatch pattern may be the same and no particular symbol may be added.

[0036] In addition, the position, size, range, etc. of each component shown in the drawings are not necessarily the same as in reality 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.

[0037] The words "film" and "layer" may be used interchangeably depending on the situation. For example, the term "conductive layer" can be used interchangeably with the term "conductive film." Alternatively, for example, the term "insulating film" can be changed to " The term "insulating layer" may be changed to "insulating layer."

[0038] (Embodiment 1) In this embodiment, a power storage device of one embodiment of the present invention will be described with reference to FIGS.

[0039] In this embodiment, a lithium ion secondary battery will be described as an example, but the present invention is not limited to this. stomach.

[0040] One embodiment of the present invention is a power storage device including a battery unit and a member having rubber elasticity. The member having rubber elasticity has a first convex portion and a second convex portion. The protrusions are arranged side by side on the first surface of the battery unit. The first protrusion and the second protrusion are brought into contact with each other by bending the first protrusion so that the first protrusion faces inward. It is possible.

[0041] The battery unit can be protected by the rubber elastic member. Since the member has flexibility, the flexibility of the battery unit can be improved. The battery unit can be protected without being damaged. If a member with rubber elasticity is used, the battery unit will bend to a certain extent, and the adjacent The two protrusions come into contact with each other, preventing the user from bending the battery unit excessively. This also prevents the battery unit from bending at any position other than the desired position. By applying one embodiment of the present invention to the above, a highly reliable, safe, and flexible power storage device can be provided. This allows for the realization of this position.

[0042] Rubber elasticity is the ability to absorb energy when an external force is applied and return to its original shape. It refers to the elasticity that can be stored as energy. A material with rubber elasticity is one that can undergo reversible deformation. Shape is possible.

[0043] A specific example of a power storage device according to one embodiment of the present invention will be described below.

[0044] FIG. 1A is a perspective view of the power storage device 100, and FIG. 1B is a top view of the power storage device 100. Figure 1(C) shows a cross section of the dashed line M1-M2 in Figure 1(B), and Figure 1(D) shows a cross section of the dashed line M1-M2 in Figure 1(B). ) shows a cross-sectional view taken along the dashed line N1-N2 in FIG. 1(B).

[0045] 2A is a top view of the power storage device 110. FIG. 2B is a top view of the power storage device 110 shown in FIG. 2(A) shows a cross-sectional view of the dashed line M3-M4. A cross-sectional view of the -N4 section is shown.

[0046] The power storage device 100 and the power storage device 110 each have a battery unit 120 and a rubber-elastic material. It has a member 109.

[0047] The battery unit 120 has a secondary battery. Specifically, the battery unit 120 has a positive electrode 1 11, a negative electrode 115, a separator 103, an electrolyte (not shown), and an outer casing 107. The battery unit 120 does not necessarily have to have the exterior body 107.

[0048] The battery unit 120 may further include a protection circuit. It has a function to prevent overcharging and over-discharging.

[0049] The battery unit 120 also has an antenna and a function for wirelessly charging the secondary battery. and a circuit for performing the same.

[0050] For the components of the battery unit, refer to the fourth embodiment.

[0051] In this embodiment, an example in which the battery unit 120 is not bent is shown. The outlet 120 may be curved. The battery unit 120 may also have an exterior housing that houses the battery unit 120.

[0052] The positive electrode lead 121 is electrically connected to the positive electrode 111. The negative electrode lead 125 is electrically connected to the negative electrode The positive electrode lead 121 and the negative electrode lead 125 are electrically connected to each other. The outer casing 107 has a portion extending outside thereof, and a part of the portion is made of a member 1 having rubber elasticity. The positive electrode lead 121 and the negative electrode lead 125 are respectively connected to the sealing layer 121 and the negative electrode lead 125. The sealing layer 129 fixes the leads and the exterior body 107 together, improving adhesion. It can be done.

[0053] The member 109 having rubber elasticity has an uneven structure 109a on at least one surface. The electricity storage device 100 shown in (A) to (D) has a member 109 having rubber elasticity and having unevenness on one surface. The electricity storage device 110 shown in FIGS. 2(A) to 2(C) is an example having a structure 109a. 109 has uneven structures 109a on two opposing surfaces.

[0054] When the power storage device of one embodiment of the present invention is bent so that the concave-convex structure 109a is on the inside, adjacent The two protrusions come into contact and it becomes difficult to bend any further. It is possible to prevent losses.

[0055] For example, the battery unit 120 may be bent to a degree that could damage it, and the battery unit 120 should not be bent any further. When the power storage device is bent at a curvature smaller than the curvature of the curved surface, the protrusions of the concave-convex structure 109a come into contact with each other. It is preferable to set the height, width, pitch, etc. of the convex portions so that the above phenomenon occurs.

[0056] The electricity storage device is preferably bendable with a curvature radius of 10 mm or more and 150 mm or less. stomach.

[0057] As shown in FIG. 1B, the concave-convex structure 109a of the power storage device 100 is A plurality of long protrusions are arranged in the X direction. That is, the portion where the concave-convex structure 109a is provided is thicker than the other portions, and therefore is difficult to bend. Therefore, the short sides of the power storage device 100 (sides parallel to the Y direction in this example) form an arc. The bending is performed such that the long sides of the power storage device 100 (sides parallel to the X direction in this example) form an arc. In other words, the provision of a concave-convex structure makes it easier to bend the power storage device. For example, the battery unit 1 can be used as a power storage device. By making it difficult for the battery 20 to bend in a direction that is weak to bending, the battery device is less likely to break. , reliability can be improved.

[0058] In the power storage device 100 and the power storage device 110, the entire battery unit 120 has rubber elasticity. The battery unit 120 is covered by a member 109 having rubber elasticity. By covering the device with a material, it is possible to realize a power storage device that is resistant to damage even when repeatedly bent and stretched. In particular, by forming the member 109 having rubber elasticity into a seamless, integrated body, The reliability of the electricity storage device can be further improved.

[0059] As shown in FIGS. 1(C) and 1(D), a rubber elastic layer is formed on one surface of the battery unit 120. The thickness t1 of the member 109 that connects the battery unit 120 and the rubber elasticity formed on the other surface of the battery unit 120 are It is preferable that the thickness t1 and the thickness t2 of the member 109 are approximately equal. The thickness t2 does not include the thickness of the concave-convex structure 109a. 2 can be said to be the shortest distance from the other surface of the battery unit 120 to the bottom surface of the protrusion. If thickness t1 and thickness t2 are the same, the battery unit 120 can be placed on the neutral plane. Therefore, the battery unit 120 is less likely to be subjected to compressive stress and tensile stress due to bending. Therefore, damage to the battery unit 120 can be reduced.

[0060] For example, the thickness t1 and the thickness t2 are 10 μm or more and 5 cm or less, and 100 μm or more and 1 cm or less. , 500 μm or more and 1 mm or less. The thinner the thickness t1 and the thickness t2, The electric storage device can also be made thinner and lighter. This improves the protection performance of the device.

[0061] 3(A) to 3(F) show other examples of the power storage device. This can be considered a modified example of the power storage device 110.

[0062] The power storage devices 112 and 113 shown in FIGS. 3A and 3B are mounted on one surface of the battery unit 120. The power storage device 112 shown in FIG. The rubber elastic member 109 does not need to be formed on the entire surface of the battery unit 120. By narrowing the area where the rubber elastic member 109 is formed, the weight of the electricity storage device can be reduced. In addition, as in the case of a power storage device 113 shown in FIG. When 109 is formed on the entire surface of the battery unit 120, the protection performance of the battery unit 120 is improved. It can be improved.

[0063] The power storage devices 114 and 116 shown in FIGS. 3(C) and 3(D) are provided on two surfaces of the battery unit 120. The member 109 having rubber elasticity is formed on the surface of the support 101. The member 109 having rubber elasticity comprises at least The power storage device 114 shown in FIG. The member 109 has a concave-convex structure 109a on one surface. In the electricity storage device 116, the member 109 having rubber elasticity has an uneven structure 109a on two surfaces. In the electricity storage device 114, only when the lower surface in the drawing is bent inward, two adjacent On the other hand, the electric storage device 116 is difficult to bend further because the protrusions in the figure are in contact with each other. Whether the lower surface is bent inward or outward, the two adjacent protrusions come into contact. In one embodiment of the present invention, the recessed portion is formed depending on the application of the power storage device or the like. The surface on which the convex structure 109a is formed can be determined.

[0064] In addition, a member having rubber elasticity is used to fit the shape of the battery unit 120 that has been curved in advance. By forming the layer 109, the power storage device 117 illustrated in FIG. 3E can be manufactured. In addition, as in the case of the electricity storage device 118 shown in FIG. 3(F), the member 109 having rubber elasticity itself is flat. The battery unit 120 may have a curved surface and may have a curved battery unit 120 inside. In (F), the battery unit 120 is curved, but two adjacent protrusions are not in contact with each other. When a curved battery unit or power storage device is further bent, two adjacent protrusions The contact makes it difficult for the battery to be deformed further, thereby preventing damage to the battery. In addition, in FIGS. 3(E) and 3(F), the concave-convex structure 109a is formed on two opposing surfaces. By doing so, even when a curved battery unit or power storage device is deformed to become flat, When two adjacent protrusions come into contact with each other, further deformation becomes difficult. This can suppress damage to the

[0065] The member 109 having rubber elasticity preferably has high heat resistance. The member 109 is heated to 100°C or higher, preferably 150°C or higher, and more preferably 200°C or higher. It is preferable that it can be used at temperatures above 100°C.

[0066] By housing the battery unit 120 in the member 109 that has high heat resistance and rubber elasticity, The battery unit 120 can be driven even under high temperatures. It can be bent in the opposite direction.

[0067] Furthermore, it is preferable that the member 109 having rubber elasticity has high cold resistance. The elastic member 109 is kept at a temperature of −25° C. or lower, preferably −50° C. or lower, and more preferably It is preferable that the flexibility is maintained even at temperatures below -100°C.

[0068] By housing the battery unit 120 in the member 109 that has high cold-resistant rubber elasticity, The battery unit 120 can be driven even at low temperatures. It can be bent in the opposite direction.

[0069] Furthermore, if the member 109 having rubber elasticity has high heat resistance and cold resistance, it can be used in a wide temperature range. This is preferable because it allows the use of a power storage device or the power storage device to be reversibly bent. The power storage device of one embodiment can be heated at a temperature of, for example, 0° C. to 80° C., preferably −25° C. to 100° C. ° C. or less, more preferably -50° C. or more and 150° C. or less, and even more preferably -100° C. or more and 2 It is preferable that the battery unit 120 can be driven at a temperature of 00°C or less. It is preferable that the power storage device be reversibly bendable within the above temperature range. Such a power storage device may be used both indoors and outdoors.

[0070] In particular, the lower the thermal conductivity of the rubber elastic member 109, the more the battery unit 120 will be able to withstand the heat generated by the battery unit 120 during use. This is preferable because the battery unit 120 is less susceptible to the temperature of the environment. However, this is not limited to the above, as long as the device is operable within the specified range under the operating environment.

[0071] Furthermore, the member 109 having rubber elasticity has resistance to solvents such as organic solvents and electrolytes, and chemical stability. It is preferable that the materials constituting the battery unit 120 and the Deterioration of the member 109 having rubber elasticity depending on the usage environment can be suppressed. In addition, it is possible to prevent the sealing by the member 109 having rubber elasticity from being broken. Therefore, the safety of the power storage device can be improved.

[0072] Furthermore, it is preferable that the member 109 having rubber elasticity has low permeability to both moisture and gas. The battery unit 120 often contains materials that are easily deteriorated by impurities such as moisture. If the member 109 having rubber elasticity is not easily permeable to moisture and gas, moisture and gas in the atmosphere Since gas can be prevented from entering the battery unit 120, deterioration of the battery unit 120 can be prevented. Therefore, the reliability of the power storage device can be improved. The member 109 having rubber elasticity may be highly water-repellent.

[0073] The power storage device of one embodiment of the present invention can be preferably used in water. For example, the battery unit 120 can be operated in water at temperatures between 0°C and 100°C. Alternatively, the electricity storage device can be reversibly bent in water at a temperature of 0°C or higher and 100°C or lower. It is preferable to be able to do so.

[0074] The material of the member 109 having rubber elasticity is, for example, a thermosetting elastomer. Specifically, natural rubber, silicone rubber, fluororubber, acrylic rubber, ethylene polypropylene Ethylene Propylene Diene Rubber (EPM), Ethylene Propylene Diene Rubber (EPDM), Urethane Rubber Rubber, acrylonitrile butadiene rubber, styrene butadiene rubber (SBR), chloro Examples include prene rubber and butyl rubber.

[0075] The material of the member 109 having rubber elasticity is heat resistant within the temperature range of the environment in which it is used. Thermoplastic elastomers may be used as long as they are suitable for the purpose. For example, polyester or Polyamide-based thermoplastic elastomers are preferred because of their high heat resistance.

[0076] In order to improve the flame retardancy, heat resistance, moldability, stability, etc. of the member 109 having rubber elasticity, Additives such as additives, plasticizers, antioxidants, light deterioration inhibitors, water repellents, antistatic agents, lubricants, and colorants. It may be added.

[0077] For example, the member 109 having rubber elasticity may contain a filler, specifically, carbon. It may contain fiber, glass fiber, aramid fiber, metal fiber, or the like.

[0078] The member 109 having rubber elasticity may or may not be transparent to visible light. If there is a component inside the material 109 that the user of the power storage device wants to see, the component is illuminated with visible light. A member 109 having rubber elasticity is made using a transparent material.

[0079] The member 109 having rubber elasticity easily disperses the internal stress generated when it is deformed. When the device is bent, the stress applied locally to the bent part is alleviated, preventing damage to the storage device. It can also function as a buffer material to disperse external physical pressure or impact. For example, the member 109 having rubber elasticity has a smaller Young's modulus than the exterior body 107. is preferred.

[0080] The method for forming the member 109 having rubber elasticity is not particularly limited, and may be, for example, extrusion molding, compression molding, or the like. Condensation molding, injection molding, or the like may be used. Embodiment 3 can be referred to for a method for manufacturing the power storage device. .

[0081] 4(A) to 4(C) and 5(A) to 5(C) show examples of planar layouts of the concave-convex structure 109a. Shows.

[0082] As shown in FIG. 4A, the concave-convex structure 109a is provided only near the end of the power storage device, and the central As shown in FIG. 4B, the power storage device may not be provided in the vicinity of the end portion and the central portion. In this way, multiple protrusions may be provided in one direction (here, the Y direction). The lengths of the convex portions in the Y direction may all be the same or may be different. In FIG. 4B, the concave-convex structure 109a in the center is larger than the concave-convex structure 109a in the vicinity of the edge. However, an example in which the length of the convex portion in the Y direction is short is shown.

[0083] The lengths of the protrusions in the X direction may all be the same or may be different. ) In the vicinity of the connection between the electrode lead and the electrode, the length of the convex part in the X direction is As shown in the example, the part that is weaker in bending than the other parts is more susceptible to bending than the other parts. The length of the convex portion in the X direction may be changed so that the convex portion comes into contact with the large radius of curvature.

[0084] As shown in FIG. 5A, the protrusions extend in a direction not parallel to the long and short sides of the power storage device. The protrusions may be formed in accordance with the direction in which the power storage device is to be bent. do.

[0085] In addition, when the power storage device is bent in two directions, the protrusions may be arranged in a matrix. ) shows an example where the convex parts are arranged in the X and Y directions which are perpendicular to each other. The protrusions may be arranged in three or more directions.

[0086] By providing the uneven structure 109a only in a part of the device, the portion of the device that can be bent may be limited. For example, FIG. 5C shows an example in which the energy storage device can be bent only at the center. If the device is to be bendable at various locations, the uneven structure 109a is formed over a wide range. It is preferable to do so.

[0087] In one embodiment of the present invention, the height of the convex portion, the length in the X direction or the Y direction, the interval between the convex portions, etc. This allows for controlling the bendability of the electricity storage device and the radius of curvature of the electricity storage device when the protrusions come into contact with each other. It is possible.

[0088] Next, the concave-convex structure 109a will be described with reference to FIGS.

[0089] 6A is a top view of the concave-convex structure 109a, and FIG. 6B is a diagram showing the concave-convex structure 109a along the dashed line in FIG. 6A. This is a cross-sectional view between N5 and N6.

[0090] In FIG. 6(B), the battery unit 120 has members 1 having rubber elasticity on two opposing surfaces. 09, and a member 10 having rubber elasticity located on one surface (hereinafter referred to as the first surface). 9 shows an example having a concave-convex structure 109a.

[0091] As shown in FIG. 6(C), the power storage device is mounted so that the first surface of the battery unit 120 faces inward. When the device is bent, two adjacent protrusions come into contact with each other, making it difficult to bend the electricity storage device any further. This prevents the storage device from bending too much and even damaging the storage device. Cut.

[0092] 6(D) shows an enlarged view of two convex portions of the concave-convex structure 109a. The cross-sectional shape of a is in contact with three sides of the first isosceles triangle and is located inside the first isosceles triangle. Similarly, the cross-sectional shape of the second protrusion 119b is a second isosceles triangle. The shape is tangent to three sides and is included inside the second isosceles triangle. The shape and the second isosceles triangle are identical in shape, have bases on the same line, and share one point (Figure 6( D) and touch at point S).

[0093] The power storage device is bent so that the first surface of the battery unit 120 faces inward, and two adjacent protrusions are When the protruding portion comes into contact with the battery unit 120, the radius of curvature R of the first surface of the battery unit 120 is It is the sum of the shortest distance t to the base and the length L of the equal side of the isosceles triangle (Figure 6(C), ( The radius of curvature R is, for example, 5 mm or more and 150 mm or less, preferably 10 mm or more and 5 It can be 0 mm or less.

[0094] As shown in FIG. 6(D), the first protrusion 119a and the second protrusion 119b have the same shape. It is also preferable that the first side of the first protrusion 119a is the first side of the first isosceles triangle. The second side of the second protrusion 119b is located on the first equilateral side of the second isosceles triangle. If the first and second equilateral sides are located on the same side and touch at one point (point S in Figure 6(E)), The first protrusion 119a and the second protrusion 119b may have different shapes.

[0095] In addition, when the protrusions come into contact with each other, the protrusions may be deformed. The shape of the protrusions is determined, for example, when no bending force is applied or when the protrusions are not in contact with each other. Or, when a bending force is applied or when a convex part is This may correspond to the shape when the two are in contact.

[0096] As shown by the dotted line in FIG. 6(F), the energy storage device is bent too much, and a local force is applied to the bent part. This may damage the battery unit 120 or the member 109 having rubber elasticity. In one embodiment of the present invention, the above-described convex portions are formed on the member 109 having rubber elasticity. This can prevent damage to the electricity storage device due to excessive bending.

[0097] FIG. 7(A) is a top view of a concave-convex structure 109a having a different shape from that of FIG. 6(A), and FIG. 7(B) ) is a cross-sectional view taken along the dashed dotted line N7-N8 in FIG. 7(A).

[0098] The concave-convex structure 109a shown in FIG. 7(A) has a concave-convex structure 109b, which is smaller than the concave-convex structure 109a shown in FIG. 6(A). The area is narrow, and the appearance of the electricity storage device is excellent.

[0099] In addition, the concave-convex structure 109a shown in FIG. 7(B) is stronger than the concave-convex structure 109a shown in FIG. 6(B). The lower the height of the protrusions, the thinner the thickness of the electricity storage device can be, which is preferable. In addition, when comparing Figure 6(C) and Figure 7(C), the one with the higher convexity has two convexities. The contact area of ​​the protrusions is increased, and after the protrusions come into contact, it becomes difficult to further bend the electricity storage device. I wish.

[0100] The cross-sectional shape of the convex portion is not limited to a trapezoid, but may be any of a variety of shapes such as a square, a rectangle, a triangle, a pentagon, etc. The shape may be a variety of shapes, such as a polygonal shape or a shape including a curved line, such as a shape including a circular arc.

[0101] For example, as shown in FIGS. 7(D) and (E), the cross-sectional shape of the convex portion may be an isosceles triangle. In other words, the first convex portion and the first isosceles triangle may have the same shape.

[0102] Furthermore, as shown in FIGS. 7(F) and (G), the cross-sectional shape of the convex portion may be rounded.

[0103] FIG. 8(A) is a top view of a concave-convex structure 109a having a different shape from that of FIG. 6(A). 8(B) is a cross-sectional view taken along the dashed line N9-N10 in FIG. 8(A).

[0104] In FIG. 7(F) and FIG. 8(C), two adjacent protrusions are in contact with each other at least at one point.

[0105] Furthermore, the concave-convex structure 109a shown in FIG. 8(D) is stronger than the concave-convex structure 109a shown in FIG. 8(C). This is preferable because the pitch is narrow and the electricity storage device can be bent more smoothly.

[0106] As shown in FIG. 8(E), the concave-convex structure 109 is in contact with the first surface of the battery unit 120. In other words, a may be provided from the first surface of the battery unit 120 to the bottom surface of the protrusion. The shortest distance t is 0 μm or more, for example, preferably 100 μm or more and 10 mm or less, The thickness is more preferably 00 μm or more and 5 mm or less, and further preferably 1 mm or more and 3 mm or less. The shorter the distance t, the thinner and lighter the power storage device can be. This improves the protection performance of the power storage device.

[0107] In the power storage device of one embodiment of the present invention, the two protrusions are in contact with each other when the two protrusions are in a first state where they are not in contact with each other. It is preferable that the first state can be reversibly transformed into a second state in which the first state is in contact with the first state. The power storage device may be able to remain in the second state by transforming into the second state.

[0108] Note that when the power storage device or the like does not need to be returned to its original shape after being bent, the power storage device of one embodiment of the present invention can be used. In place of the material having rubber elasticity, a material having crystalline elasticity may be used in the electrical device or the like. In one embodiment of the present invention, a member having crystalline elasticity has an uneven structure, and thus, a power storage device (battery unit) Therefore, it is possible to prevent the device (such as a knitted knit) from being damaged by excessive bending. Crystal elasticity means that energy is not stored and energy is not used for plastic deformation. It refers to the elasticity that can change the energy. Examples of materials with crystalline elasticity include metals. do.

[0109] In this embodiment, an example has been shown in which a member having rubber elasticity houses a battery unit. One aspect of the invention is not limited to this. For example, other configurations in which the device is housed in a member having rubber elasticity may be used. The elements include a display unit having a display panel, a light-emitting unit having a light-emitting panel, etc. etc.

[0110] As described above, the power storage device of one embodiment of the present invention includes a battery unit and a plurality of protrusions. When the electricity storage device is bent, two adjacent protrusions are in contact with each other. By touching the power storage device, it is possible to prevent the user from bending the power storage device excessively. This makes it possible to realize a power storage device that is less susceptible to damage and is safe and highly reliable.

[0111] Note that one embodiment of the present invention may be a curved power storage device, a flexible power storage device, or a deformed power storage device. However, one embodiment of the present invention is directed to power storage devices having various shapes or various hardnesses. For example, one embodiment of the present invention may be applied to a power storage device having a non-curved flat plate shape. Suitable for a shaped electricity storage device, a cylindrical electricity storage device, or an electricity storage device that is not flexible and cannot be deformed. It may also be used.

[0112] This embodiment mode can be combined with other embodiment modes as appropriate.

[0113] (Embodiment 2) In this embodiment, a light-emitting device according to one embodiment of the present invention will be described with reference to FIGS.

[0114] In this embodiment, a light-emitting device having a light-emitting panel will be described as an example. The present embodiment can also be applied to a display device having a display panel, for example. can.

[0115] One embodiment of the present invention is a light-emitting device including a light-emitting unit and a member having rubber elasticity. The light-emitting unit has a light-emitting panel, and the light-emitting panel has a light-emitting element. At least a part of the member having rubber elasticity houses the light emitting unit. The member having rubber elasticity transmits light emitted by the element. The light emitting element has a first convex portion and a second convex portion arranged side by side. The light emitting element emits light from the second surface side of the light emitting unit. The first surface and the second surface of the light-emitting unit face each other. The second protrusion is formed by bending the light emitting device so that the first surface of the light emitting unit faces inward. , can come into contact with each other.

[0116] By using a member having rubber elasticity, the light emitting unit can be protected. Since the member having the flexible structure has flexibility, the light emitting device using the flexible light emitting unit can be manufactured. The light emitting unit can be protected without impairing flexibility. By using a material with rubber elasticity, the light emitting unit will not be bent too much and Therefore, bending of the sheet at positions other than the desired position can be suppressed. By applying this, it is possible to realize a light emitting device that is highly reliable, safe, and flexible. can.

[0117] In the light emitting device of this embodiment, the entire light emitting unit is covered with a member having rubber elasticity. The light-emitting unit is covered with a material that has rubber elasticity, allowing it to bend and stretch repeatedly. It is possible to realize a light emitting device that is not easily damaged even when it is repeatedly used. By making the components into a seamless, integrated unit, the intrusion of external impurities is suppressed, and the light-emitting device In addition, the reliability of the device can be improved. By using such a member, a light emitting device with good display quality can be realized.

[0118] The light emitting unit preferably includes a secondary battery. It has the function of supplying

[0119] In the light-emitting device of one embodiment of the present invention, the light-emitting panel and the secondary battery are collectively attached to a member having rubber elasticity. Therefore, a highly reliable light-emitting device can be easily manufactured. It is possible.

[0120] The light emitting unit preferably has a circuit that has a function of wirelessly charging the secondary battery. The circuit has an antenna.

[0121] A light-emitting device according to one embodiment of the present invention can charge a secondary battery using contactless power transmission. Therefore, there is no need to remove the secondary battery from the member having rubber elasticity when charging. Therefore, the entire light emitting unit can be completely covered with a member having rubber elasticity, and the sealing property is improved. This can further improve performance.

[0122] By using a material with high heat resistance and rubber elasticity, the light-emitting unit can be driven even at high temperatures. Furthermore, the light emitting device can be reversibly bent even at high temperatures. It is more preferable to use a light emitting element and a secondary battery that are highly heat resistant.

[0123] In one embodiment of the present invention, at least a part of the light-emitting unit is flexible. For example, the light-emitting panel may be flexible, or the light-emitting panel may not be flexible and the secondary battery Depending on the region and position of the flexible portion of the light-emitting unit, This allows the layout of the convex portions of the member having rubber elasticity to be determined.

[0124] In this embodiment, an example in which the member having rubber elasticity covers the entire light-emitting unit is shown. However, one aspect of the present invention is not limited to this. The member having rubber elasticity may be one or more of the light-emitting units. It can be provided on the upper surface.

[0125] A specific example of the light-emitting device according to one embodiment of the present invention will be described below.

[0126] The light emitting device 150 shown in FIG. 9(A) has a light emitting unit and a member 40 having rubber elasticity. The member 40 having rubber elasticity has a light emitting unit inside. It can be said that the light emitting unit is sealed by the member 40 having elasticity. The device has a panel 10, a secondary battery 20, and a circuit 30.

[0127] An example of the connection relationship between the light-emitting units is shown in the block diagram of FIG. 9(B).

[0128] The light-emitting panel 10 includes a light-emitting element 11. The light-emitting element 11 receives power from a secondary battery 20. It has the function of emitting light using the power supplied.

[0129] The light-emitting panel 10 has a function of emitting light using power supplied from a source other than the secondary battery 20. It may have.

[0130] The secondary battery 20 has a portion that overlaps with the light-emitting panel 10 .

[0131] The secondary battery 20 may also have a function of supplying power to devices other than the light-emitting panel 10.

[0132] The secondary battery 20 corresponds to the battery unit 120 illustrated in the first embodiment, and includes a positive electrode, a negative electrode, a separator, and a The battery includes a battery, an electrolyte, and an outer casing.

[0133] The circuit 30 has an antenna 31. The antenna 31 has a portion overlapping with the light-emitting panel 10. The circuit 30 can charge the secondary battery 20 wirelessly (or contactlessly). .

[0134] The overlapping portion of the light-emitting panel 10 and the circuit 30, and the overlapping portion of the light-emitting panel 10 and the secondary battery 20 and overlapping portions, the light emitting device 150 can be made smaller. In particular, the light-emitting panel 10, the secondary battery 20, and the circuit 30 can be It is preferable to provide an overlapping portion.

[0135] The secondary battery 20 preferably has a portion overlapping with the circuit 30. For example, the antenna 31 At least a part of the antenna 31 may overlap with the secondary battery 20. and the secondary battery 20, so that the antenna 31 is not easily visible to the user of the light emitting device. By stacking the light-emitting panel 10, the secondary battery 20, and the circuit 30 so that This is preferable because it can prevent the appearance from being damaged. The antenna 31 receives power from an external antenna via the light-emitting panel 10.

[0136] When the environment in which the light-emitting device is used is determined, a light-emitting element capable of emitting light in that environment, and A secondary battery capable of supplying power to the light-emitting panel in this environment is used.

[0137] The light-emitting device according to one embodiment of the present invention can preferably be used in both low-temperature and high-temperature environments. Alternatively, the light-emitting device of one embodiment of the present invention can be used in a wide temperature range (for example, 0° C. or higher and 100° C. or lower, Preferably, it is used at a temperature between -25°C and 150°C, more preferably between -50°C and 200°C. The light-emitting device according to one embodiment of the present invention can be used both indoors and outdoors. That's fine.

[0138] The light-emitting element included in the light-emitting device of one embodiment of the present invention exhibits excellent optical properties under an environment of 0° C. and an environment of 100° C. It is preferable that the light-emitting device of one embodiment of the present invention can emit light from each of the light-emitting elements. The secondary battery supplied power to the light-emitting panel in both 0°C and 100°C environments. It is preferable to be able to do this.

[0139] The light emitting device may have a switch. Illustrated are a light-emitting panel 10, a secondary battery 20, a circuit 30, a circuit 50, and a switch 51.

[0140] For example, as shown in FIG. 9C, when the switch 51 is in the off state, the circuit 30 communicates wirelessly. The secondary battery 20 can be charged.

[0141] For example, as shown in FIG. 9(D), when the switch 51 is in the on state, the secondary battery 20 generates The light panel 10 can be powered.

[0142] Each element of the light-emitting device of one embodiment of the present invention will be described in detail below.

[0143] <Light-emitting panel 10> The light-emitting panel 10 has a light-emitting element 11. The light-emitting panel also has a detection element such as a touch sensor. An example of the configuration of light-emitting panel 10 will be described in detail in the sixth embodiment.

[0144] The light-emitting panel 10 has an active element (active element, non-linear element) in the pixel. Use a passive matrix system or a passive matrix system that does not have active elements in the pixels. can be done.

[0145] The light-emitting panel 10 may be flexible. For example, the support substrate and the sealing substrate of the light-emitting element 11 By using a film on at least one of the substrates, the flexibility of the light-emitting panel 10 is increased. It is possible.

[0146] The light emitting element 11 is an element that can emit light in both low temperature and high temperature environments. The low temperature environment is, for example, an environment of -100°C or higher and 0°C or lower, preferably - An environment between 100°C and -25°C, preferably between -100°C and -50°C The high temperature environment is, for example, an environment of 100°C or higher and 300°C or lower, preferably An environment of 150°C or higher and 300°C or lower, more preferably an environment of 200°C or higher and 300°C or lower, is preferred. The light emitting element 11 can be used not only in a low temperature environment and / or a high temperature environment, but also in a temperature higher than 0°C. For example, the light emitting element 11 can be heated at room temperature (20 It can emit light at temperatures above 30°C (above 30°C).

[0147] The light emitting element 11 can be a self-luminous element, and can be turned on or off by a current or a voltage. The category includes devices whose brightness is controlled, such as light-emitting diodes (LEDs), In addition to the light-emitting element, a display element can also be used. can also be applied.

[0148] The higher the heat resistance of the light emitting element 11, the more preferable. In this case, the glass transition temperature of each organic compound contained in the organic EL element is 100°C or higher and 300°C or lower. °C or less, and more preferably 150 to 300 °C.

[0149] In a light-emitting device according to one embodiment of the present invention, an antenna receives power from an external antenna through a light-emitting panel. Therefore, it is preferable that the thickness of the pair of electrodes of the light emitting element 11 is as thin as possible. The sum of the electrode thicknesses is 1 μm or less, preferably 500 nm or less, more preferably 350 nm or less. The thickness is preferably 250 nm or less, and more preferably 250 nm or less.

[0150] <Secondary battery 20> The secondary battery 20 may be, for example, a lithium polymer battery (lithium Lithium-ion secondary batteries such as ion polymer batteries, lithium-ion batteries, nickel-metal hydride Batteries, nickel-cadmium batteries, organic radical batteries, lead-acid batteries, secondary air batteries, nickel-zinc batteries, silver Zinc batteries are examples.

[0151] By using lithium-ion secondary batteries that can achieve high energy density, the light-emitting device can be made lighter. This is preferable because it allows for a reduction in size and size.

[0152] For example, a secondary battery having a non-aqueous electrolyte can be used. The non-aqueous electrolyte is an ionic liquid. Ionic liquids have both room temperature molten salts and alkali metal salts. They are flame-retardant and non-volatile. Therefore, a secondary battery with high heat resistance can be realized.

[0153] Secondary batteries using gel electrolytes and all-solid-state secondary batteries using solid electrolytes are respectively: It is preferable because it has high heat resistance and safety.

[0154] The secondary battery 20 may be of various types such as a coin type (single layer flat type), a cylindrical type, a thin type, a square type, or a sealed type. In addition, a secondary battery having a plurality of positive electrodes, negative electrodes, and separators can be used. or a structure in which the positive electrode, negative electrode, and separator are wound (wound type). good.

[0155] The secondary battery 20 may be flexible. For example, by using a film for the exterior body, The flexibility of the secondary battery 20 can be improved. The area surrounded by the exterior body contains the positive electrode, the negative electrode, and and an electrolyte (or electrolytic solution).

[0156] In the light emitting device, the light emitting element 11 and the secondary battery 20 may be arranged in a stacked manner. The larger the overlapping area between the optical element 11 and the secondary battery 20, the more heat generated by the light emitting element 11 is utilized. It is difficult to operate in a low temperature environment compared to a high temperature environment. Even when a secondary battery is used, the reliability of the light emitting device can be improved.

[0157] A configuration example of the secondary battery 20 will be described in detail in the fourth embodiment.

[0158] <Circuit 30> The circuit 30 includes an antenna 31. The circuit 30 further includes a controller 32. That's fine.

[0159] The antenna 31 can receive power from an external antenna (for example, the antenna 68 of the charger). Antenna 31 may receive power from an external antenna via light-emitting panel 10. Alternatively, the antenna 31 may receive power from an external antenna via the secondary battery 20.

[0160] The controller 32 converts the power received by the antenna 31 into the power to be supplied to the secondary battery 20. and outputs it to the secondary battery 20. For example, the controller 32 In this case, the power received by the antenna 31 may function as a C converter. The electric power is converted into DC power and output to the secondary battery 20 .

[0161] In the light emitting device of this embodiment, the antenna 68 (primary coil) of the charger and the antenna of the light emitting device The secondary coil is magnetically coupled to the magnetoresistive element 31 (secondary coil), and the AC magnetic field generated by the primary coil The power is transmitted to the secondary coil without contact by electromagnetic induction, which generates a voltage in the coil. The charging method is not limited to the electromagnetic induction method.

[0162] The use of the antenna of the light emitting device is not limited to contactless charging of the secondary battery. For example, the light emitting device may be provided with an antenna and a memory to transmit and receive electronic data. Depending on the data, the light-emitting panel 10 may display images, information, etc. An antenna may be provided that has the S function and can acquire location information and GPS time.

[0163] For safety reasons, it is important that the input / output terminals for charging or discharging the secondary battery are not exposed on the surface of the light-emitting device. If the input / output terminals are exposed, they may be shorted out by rain or other water. There is a risk of electric shock if the input / output terminals come into contact with the human body. Since the secondary battery can be charged by contact, the input / output terminals are not exposed on the surface of the light emitting device. It can be concluded that

[0164] <Member 40 having rubber elasticity> The member 40 having rubber elasticity contains the light-emitting panel 10, the secondary battery 20, the circuit 30, etc. The light emitting unit is sealed with a member 40 having rubber elasticity. The device is isolated from the atmosphere outside. For the rubber elastic member, see also embodiment 1. It can be illuminated.

[0165] <Circuit 50> The circuit 50 converts the power supplied from the secondary battery 20 into power that causes the light emitting element 11 to emit light. For example, the output voltage of the secondary battery 20 is adjusted to the value required for the light emitting element 11 to emit light. The power supply may have a function of converting (boosting or lowering) the voltage to a desired voltage.

[0166] The circuit 50 may also have a function of controlling the timing at which the light emitting element 11 emits light. For example, the light emitting element 11 may have a function of driving the light emitting element 11 so that the light emitting element 11 blinks. good.

[0167] The circuit 50 also generates a signal for driving the light-emitting panel 10 and outputs the signal to the light-emitting panel 10. The circuit 50 may have a function of outputting a signal line driver circuit or a scanning line driver circuit. Furthermore, the light-emitting panel 10 may have a signal line driving circuit and a scanning line driving circuit. stomach.

[0168] <Switch 51> The switch 51 is electrically connected to the circuit 50. The switch 51 is also connected to the secondary battery 20. The switch 51 is electrically connected to the circuit 30. There are.

[0169] The switch 51 is not particularly limited, and may be, for example, an electrical switch, a mechanical switch, or the like. Specifically, transistors, diodes, magnetic switches, mechanical Examples include switches having contacts.

[0170] 10(A) and (B) show specific examples of the light-emitting unit. 10(A) shows the front surface (light-emitting surface), and FIG. 10(B) shows the back surface of the light-emitting unit.

[0171] 10(A) and 10(B) show an example in which a laminated secondary battery is used as the secondary battery 20. As shown in FIG. 10(B), the central part of the secondary battery 20 has a plurality of electrodes stacked. This is the part that is thicker than the edge.

[0172] The electrode 21a is electrically connected to either the positive or negative electrode of the secondary battery. The positive electrode is electrically connected to the other of the positive electrode and the negative electrode of the secondary battery.

[0173] The electrodes 21a and 21b are bent through the circuit board 55 and connected to the terminals 33 on the circuit board 55. a and 33b, respectively.

[0174] The circuit board 55 is provided with elements (electronic components) that constitute the circuit 30, the circuit 50, etc., shown in FIG. 9(C) and the like. The circuit board 55 is provided with, for example, a capacitance element, a resistance element, and the like. The circuit board 55 is provided with electronic components such as a resistor, a resistor, a switch element, etc. A printed circuit board may be used.

[0175] The circuit board 55 is also provided with a switch 51. In FIGS. An example in which a magnetic switch is used as the switch 51 is shown. The switch is turned on or off by attaching or detaching a magnet. You can toggle it on or off.

[0176] The antenna 31 is electrically connected to a terminal 34 on the circuit board 55. A part of the light emitting device is located between the secondary battery 20 and the light emitting panel 10. The antenna 31 has a portion that overlaps with the light-emitting panel 10. The antenna 31 also has a secondary It has a portion that overlaps with the battery 20.

[0177] The antenna 31 can receive power from an external antenna via the light-emitting panel 10.

[0178] In the light-emitting panel 10, the terminal 12a is electrically connected to one of the anode and the cathode of the light-emitting element 11. The terminal 12b is electrically connected to the other of the anode and the cathode of the light emitting element 11. The terminals 12a and 12b function as the anode and cathode of the light emitting element 11, respectively. That's fine.

[0179] The terminal 12a is electrically connected to a terminal 52a on a circuit board 55 via a wiring 53a. The terminal 12b is electrically connected to a terminal 52b on a circuit board 55 via a wiring 53b. are.

[0180] In the light-emitting device of one embodiment of the present invention, the secondary battery and the antenna are independently provided on the light-emitting panel. There is also a portion where the secondary battery and the circuit overlap. As shown in B), for example, part of the antenna is located between the light-emitting panel and the secondary battery. That's fine.

[0181] As described above, the light emitting device is made up of the secondary battery, the light emitting panel, the circuit board, the antenna, etc. If at least two of the elements have overlapping portions, the light-emitting device can be made smaller. This is preferable.

[0182] For example, if the secondary battery 20 is connected to at least one of the light-emitting panel 10, the circuit board 55, and the antenna 31, It is preferable that at least one of them has an overlapping portion. As shown in Fig. 1B, the secondary battery 20 is connected to the light-emitting panel 10, the circuit board 55, and the antenna 31. It is particularly preferable that the above-mentioned portions overlap with each other.

[0183] The environment in which the light-emitting device of one embodiment of the present invention can be used is not limited to the air atmosphere. The light emitting device can be used in water at temperatures between 0°C and 100°C, for example. The temperature range in which the secondary battery can be used is wide, and the light emitting element and the secondary battery have rubber elasticity. Since the light-emitting device of one embodiment of the present invention is sealed with a material, it can be used in water. Therefore, high reliability can be ensured.

[0184] 11(A) to 11(F) are each a schematic cross-sectional view of a light-emitting device according to one embodiment of the present invention.

[0185] As shown in FIGS. 11(A) to 11(F), the light emitting device has a rubber elastic member 40 therein. The light-emitting device includes a light-emitting panel 10, a secondary battery 20, and a circuit 30. For simplicity, FIG. Although the thicknesses of the light panel 10, the secondary battery 20, and the circuit 30 are illustrated as being approximately equal, The thickness may vary.

[0186] The space sealed by the member 40 having rubber elasticity is a reduced pressure atmosphere or an inert atmosphere. By using these atmospheres, light emission is improved compared to the case of air atmosphere. The reliability of the panel 10 and the like can be improved.

[0187] The member 40 having rubber elasticity transmits light emitted from the light emitting element of the light emitting panel 10. The user can attach the light-emitting panel 10 and the secondary battery 10 via the member 40 having rubber elasticity. 20, and circuit 30 are visible.

[0188] In FIG. 11(A), the secondary battery 20 and the light-emitting panel 10 overlap each other when viewed from the light-emitting surface of the light-emitting device. In addition, the secondary battery 20 and the circuit 30 are overlapped with each other as shown in FIG. As shown in the figure, the light-emitting panel 10 and the circuit 30 may be configured to overlap each other. The circuit board 55 shown in FIG. 10(A) may be provided in addition to the above.

[0189] The light emitting device has one light emitting panel 10, one secondary battery 20, and one circuit 30. The number of the elements is not limited to one, and may be two or more independently.

[0190] An uneven structure 40a is provided on the back side of the light emitting surface of the light emitting device.

[0191] The light-emitting device may have a touch panel. For example, as shown in FIG. A touch panel 45 may be provided on the elastic member 40. For example, a capacitive touch panel may be provided. The light emitted from the light emitting element may be detected by a detection element of the touch panel 45. The power is extracted to the outside through the element.

[0192] The light-emitting unit may also have a touch panel. For example, as shown in FIG. As shown in FIG. 1, the touch panel 45 may be located further back than the light-emitting panel 10 when viewed from the light-emitting surface. This eliminates the need for the touch panel 45 to transmit light emitted from the light-emitting elements. 1(D) shows an example in which a touch panel 45 is provided between the light-emitting panel 10 and the secondary battery 20. However, the secondary battery 20 may be disposed between the light-emitting panel 10 and the touch panel 45. For example, it may have a pressure-sensitive touch panel.

[0193] In addition, the uneven structure 40a is overlapped with only one of the light-emitting panel 10 and the secondary battery 20. FIG. 11(E) shows an example in which the light-emitting panel 10 and the concave-convex structure 40a overlap, and FIG. 11(F) shows an example in which the light-emitting panel 10 and the concave-convex structure 40a overlap. An example in which the secondary battery 20 and the concave-convex structure 40a overlap will be shown.

[0194] Note that the light-emitting device of one embodiment of the present invention may be used as a display device or a lighting device. For example, a light source such as a backlight or a frontlight, i.e., a display device It may also be used as a lighting device for

[0195] In addition, the light-emitting device of one embodiment of the present invention may include other semiconductor circuits, such as an imaging element, a gyro sensor, or the like. sensors, acceleration sensors, control circuits to prevent overcharging, touch panels, etc. For example, an image sensor may be mounted to display a captured image on a light-emitting panel. In addition, by installing a touch panel, it is possible to display the desired position on the touch panel. By touching the screen, you can operate electronic devices and input information. By incorporating a CPU, it is possible to create a computer that can be used over a wide temperature range. do.

[0196] The light-emitting device of one embodiment of the present invention includes a light-emitting element for fixing to the arm or wrist of a human body or a robot. The attachment part may be any part of the human body or robot. There is no particular limitation, and the device may be worn on the waist or ankle, for example.

[0197] The light-emitting device of one embodiment of the present invention has the following features: it has a secondary battery, it can be used in a wide temperature range, and so on. Therefore, it can be suitably used as a portable light emitting device.

[0198] This embodiment mode can be combined with other embodiment modes as appropriate.

[0199] (Embodiment 3) In this embodiment, a method for manufacturing a power storage device of one embodiment of the present invention will be described.

[0200] Note that although this embodiment describes an example of manufacturing a power storage device of one embodiment of the present invention, In this way, a light-emitting device, a display device, or the like according to one embodiment of the present invention can be manufactured. A manufacturing method of a power storage device, a light-emitting device, a display device, or the like according to one embodiment can be described using the method illustrated in this embodiment. The method is not limited to this.

[0201] In the following, the same opposing An example of manufacturing an energy storage device having a concave-convex structure on two adjacent surfaces will be described. The fabrication of the power storage device described in the above embodiment can be carried out in the atmosphere and does not require complicated equipment. This can be done easily and at low cost.

[0202] <Example 1 of manufacturing method of power storage device> First, FIG. 12A shows a structure 191 used for manufacturing a power storage device. An enlarged view of the area 60 shown in FIG. 12(A) is shown.

[0203] The structure 191 has a recess 192. The recess 192 has a surface that is mirror-finished, It is preferable that the flatness of the surface is increased. The recess 192 is provided with an uneven structure 192a. It is being done.

[0204] The depth, width, and intervals of the recesses of the concave-convex structure 192a are determined by forming the recesses in a member having rubber elasticity. The depth of the recess can be determined depending on the height, width, and interval of the convex portions of the concave-convex structure. The width and spacing may be the same for all recesses or may be different for each recess. For example, the battery unit 120 may have a portion that is strong against bending and a portion that is weak against bending. In this case, by changing the size and spacing of the recesses in the two parts, the part that is weak to bending is not so strong. It is controlled so that the parts that are strong against bending can be bent more tightly while preventing bending. It is possible.

[0205] The uneven structure 192a is not limited to a structure having a plurality of recesses. In this case, the member having rubber elasticity may have a plurality of protrusions. A plurality of correspondingly shaped recesses can be formed.

[0206] For example, a mold or the like can be used as the structure 191. The materials used are not limited to metals. The structure 191 may be made of glass, ceramics, organic resins, or the like. Materials such as grease, wood, etc. may also be used.

[0207] When fabricating the electricity storage device, as shown in FIG. 12(C), the recesses 192 are arranged to face each other. Next, in the space surrounded by the two recesses 192, , the battery unit 120 is placed.

[0208] Although an example in which two structures 191 are used is shown in FIG. 12C, one embodiment of the present invention is not limited to this. Two structures having different shapes may be used. For example, In the body, the recesses 192 may have similar shapes to each other or may have different shapes. In addition, the concave-convex structures 192a in the two structures may have the same shape. The recess 192 may have a concave-convex structure 192a or a different shape. By using a structure having a flat recess 192, it is possible to This allows the formation of a concave-convex structure only on the surface. An electrical device 100 can be fabricated.

[0209] At this time, a part of the battery unit 120 is exposed outside the space surrounded by the two recesses 192. In FIG. 12(D), the electrode lead 123 (positive electrode 19 shows an example in which the negative electrode lead and the negative electrode lead are exposed to the outside of the space surrounded by the two recesses 192. Furthermore, a part of the exterior body may be exposed. The light emitting unit may be located inside the space surrounded by the two recesses 192. For example, By disposing the light emitting device 150 inside the space surrounded by the two recesses 192, the light emitting device 150 (FIG. 9(A) (See etc.) can be produced.

[0210] Next, a liquid filler 195 is poured into the space surrounded by the two recesses 192. For example, a polymer material can be used as the filler 195. The filler 195 becomes transparent after hardening. The filler 195 may be a one-component type that does not require a hardener. It is possible to use materials such as two-component materials that harden by mixing the base agent and hardener. In addition, materials that harden when heated or irradiated with ultraviolet light or other light are used. The filler 195 may also contain a moisture-proofing agent that inhibits the permeation of moisture.

[0211] In this embodiment, the filler 195 is a silicone rubber that becomes translucent after hardening. Use a two-component material.

[0212] The filler 195 is hardened along the shape of the two recesses 192, thereby forming a rubber-like elastic material. After the rubber elastic member 109 is formed, two structures 191 are formed. Before filling the recess 192 with the filler 195, a release agent is applied to the surface of the recess 192. This makes it possible to easily separate the structure 191 and the member 109 having rubber elasticity. preferable.

[0213] <Example 2 of manufacturing method of power storage device> Next, in order to make the thickness t1 and the thickness t2 of the member 109 having rubber elasticity the same, This section explains how to make the device.

[0214] First, the spacer 165 is placed on the side of the battery unit 120 .

[0215] The battery unit 120 with the spacer 165 arranged therein is shown in a perspective view in FIG. 13(A), and 13(B) shows a cross-sectional view taken along the dashed line V1-V2 in FIG. This is shown in FIG. 13(C), and a cross-sectional view taken along the dashed line V3-V4 is shown in FIG. 13(D).

[0216] 13(A) to 13(C), the battery unit 120 has a U-shaped cross section on three sides. This shows an example in which a spacer 165 is arranged. Specifically, in the recessed portion of the spacer 165, The spacer 165 is placed so that the side of the battery unit 120 is positioned thereon.

[0217] The thickness t of the part of the spacer 165 that extends along one surface of the battery unit 120 1 and the thickness t of the part of the spacer 165 that extends along the other surface of the battery unit 120. 2 preferably have the same thickness (FIG. 13(D)). The one surface and the other surface are surfaces that face each other. When the bending direction is fixed, thickness t1 and thickness t2 can be set to different thicknesses depending on the purpose. good.

[0218] The sum of the thickness t1, the thickness t2, and the thickness t3 of the battery unit 120 is called the thickness Here, the thickness t3 of the battery unit 120 is, for example, the thickness of the battery unit 120. Alternatively, the thickness t3 of the battery unit 120 can be set to the maximum value of the thickness of the battery unit. The average thickness of the battery unit 120 in the area where the battery 120 and the spacer 165 contact each other The thickness T may be changed depending on the position on the battery unit 120. stomach.

[0219] The cross-sectional shape of the spacer 165 is not necessarily limited to a U-shape. As shown, instead of the spacer 165 having a U-shaped cross section, a spacer having a Y-shaped cross section is used. A sensor 165a may also be used.

[0220] At least one spacer 165 is arranged on each of at least three sides of the battery unit 120. In Fig. 13(A) and (B), the two long sides of the battery unit 120 are provided with multiple In the example shown, several spacers 165 are arranged on one short side, and one spacer is arranged on the other short side. For example, the spacers 165 may be arranged on all four sides of the battery unit 120. good.

[0221] As shown in FIG. 14(A), spacers 165 are placed at the four corners of the battery unit 120. 14(B), some or all of the three sides of the battery unit 120 may be may be covered with a spacer 165.

[0222] 15(A) to 15(C), a rectangular parallelepiped spacer 1 is placed on the battery unit 120. In FIG. 15(A), spacers 165b, 165c, and 165d may be arranged. 15(A) shows a top view of the battery unit 120 in which the battery packs 65c and 165d are arranged. A cross-sectional view between the dashed lines V5 and V6 is shown in FIG. 15(B), and a cross-sectional view between the dashed lines V7 and V8 is shown in FIG. This is shown in Figure 15(C). The spacer 165b is arranged on the same surface of the battery unit 120. The spacer 165c has different thicknesses. The thickness of the spacer 165b arranged on the thin area (area with thickness t3) is defined as thickness t1, thickness t The spacer 165c arranged on the same surface as the spacer 165b having a thickness of t1 is , which is thicker than the thickness t1. The spacer 165b having the thickness t2 is disposed on the same side as the spacer 165b. The thickness of the spacer 165d is preferably equal to or less than the thickness T. Furthermore, there is no limitation on the width of the spacer 165d (the length in the V7-V8 direction) and it may be determined appropriately. For example, the narrower the width of the spacer 165d, the more compact the power storage device can be. The wider the gap, the higher the reliability of the power storage device.

[0223] Next, the structures 191 are stacked together, and a battery unit with spacers is formed. 120 is placed in the space surrounded by the recess 192. At this time, the spacer Care must be taken to ensure that the battery unit 120 does not protrude from the recess in the structure.

[0224] FIG. 16(A) shows two structures sandwiching a battery unit 120 with a spacer therebetween. 16(A) is a perspective view of the state where the two 191 are overlapped. The cross-sectional views of the spacer are shown in Figures 16(B) and (C). In FIG. 16(B), when a spacer 165 is used, and in FIG. 16(C), 16 shows the battery unit with the spacer 165a. 120 is disposed in a space surrounded by two recesses 192. The distance k is preferably the same as the thickness T.

[0225] Next, as shown in FIG. 12(D), a liquid filler 1 is poured into the space surrounded by the two recesses 192. At this time, if the viscosity of the filler 195 is high, a gap may be formed around the spacer 165. This may cause a decrease in the reliability of the produced power storage device. This allows the filler 195 to easily enter the space around the spacer 165, thereby preventing the occurrence of gaps. The viscosity of the filler 195 is preferably 10 Pa·s (Pascal seconds) or less, and It is more preferably Pa·s or less, and even more preferably 1 Pa·s or less.

[0226] The filler 195 is hardened along the shape of the two recesses 192, thereby forming a rubber-like elastic material. After the rubber elastic member 109 is formed, two structures 191 are formed. Separate.

[0227] The member 109 having rubber elasticity is formed using a material having the same composition as the spacer. By doing so, it is possible to improve the bonding state between the spacer and the member 109 having rubber elasticity. This prevents impurities from entering through the junction boundary surface, improving the reliability of the electricity storage device. It can be said that:

[0228] In addition, when the spacer and the member 109 having rubber elasticity are made of different materials, the refractive index, transmittance, etc. Due to this difference, optical distortion occurs near the boundary between the spacer and the member 109 having rubber elasticity. Therefore, in addition to the secondary battery, the display panel is made of a material having rubber elasticity. When the spacer 109 is used to cover the display device, the display quality may be reduced. It is preferable to arrange the area so that it does not overlap with the display area.

[0229] Therefore, the member 109 having rubber elasticity has the same refractive index and transmittance as the spacer. It is preferable to use a material that can bond the two so that the boundary is not visible. Therefore, the display quality of the display device can be improved.

[0230] For example, by using the same filler as the filler 195 as the spacer, it is possible to obtain a spacer having rubber elasticity. A spacer can be formed having the same composition as the member 109. The spacer and the rubber elastic material By using a material having the same composition as the member 109 having the refractive index and transmittance of both, can be made the same.

[0231] <Example 3 of manufacturing method of power storage device> Methods 3 and 4 for manufacturing a power storage device described below use less material than methods 1 and 2. The member 109 having rubber elasticity can be formed from the material. In comparison, the number of structures used can be reduced. This is particularly effective when the thickness of 109 is reduced. For example, when the thickness t1 or the thickness t2 is reduced by 1 It is particularly effective to make the thickness of the film less than 500 μm, preferably less than 500 μm. This can further increase the productivity of power storage devices and display devices.

[0232] FIG. 17A shows a structure 521 used for manufacturing a power storage device. 17(A) shows an enlarged view of the area 61 shown in FIG. 17(A). A cross-sectional view between the dashed line Y1 and Y2 is shown in FIG. 17(C), and a cross-sectional view between the dashed line Y1 and Y2 is shown in FIG. 17(D). 17(E) shows an enlarged view of the region 62 shown in FIG. 17(D).

[0233] The structure 521 has a recess 522. The recess 522 is provided with a concave-convex structure 522a. There are.

[0234] The uneven structure 522a is not limited to a structure having a plurality of recesses. , may have a plurality of protrusions.

[0235] The depth d1 of the recess 522 is equal to the sum of the thickness t1 or the thickness t2 and the thickness t3. The depth d1 of the recess 522 is preferably the depth of the recess of the concave-convex structure 522a. Does not include.

[0236] For example, a mold or the like can be used as the structure 521. The material used is not limited to metal. The structure 521 may be made of glass, ceramics, organic resin, or the like. Materials such as grease, wood, etc. may also be used.

[0237] First, filler 195 is placed in recess 522. Then, filler 195 is hardened to have rubber elasticity. The filling amount of the filler 195 is determined based on the amount of the rubber to be produced (FIG. 18(A)). It can be determined depending on the thickness t1 of the elastic layer 531 and the depth of the relief structure 522a. (FIGS. 18(B) and (C)). An enlarged view of the region 63 shown in FIG. 18(C) is shown in FIG. 18(D). Shown below.

[0238] Next, the battery unit 120 is placed on the layer 531 having rubber elasticity (FIG. 19). When doing so, be careful not to trap any air bubbles between the battery unit 120 and the rubber elastic layer 531. do.

[0239] FIG. 20(A) shows a state in which the battery unit 120 is placed on a layer 531 having rubber elasticity. 20(B) is a perspective view of the portion between the dashed line X1-X2 in FIG. A cross-sectional view taken along the dashed dotted line Y1-Y2 is shown in FIG. 20(C).

[0240] After the battery unit 120 is placed on the layer 531 having rubber elasticity, the battery unit 120 is inserted into the recess 522. A filler 195 may be further added and then cured. The relative positions of the layer 531 and the battery unit 120 can be fixed. After separation from the structure 521, the layer 531 having rubber elasticity and the battery unit 120 In FIG. 21(A), the added filler 195 is 21(B) shows an example in which the thickness of the battery unit 120 is thinner than that of the battery unit 120. 120.

[0241] Next, the rubber elastic layer 531 is separated from the structure 521 together with the battery unit 120. (FIG. 22(A)). Note that FIG. 22(B) shows the dashed line Y1-Y2 in FIG. 22(A). 1 is a cross-sectional view of a battery unit 120 provided on a layer 531 having rubber elasticity. Fig. 22(C) shows an enlarged view of the area 64 shown in Fig. 22(B).

[0242] Furthermore, filler 195 is poured into recess 522 (FIG. 23). For example, a rubber elastic material having different hardness and color on the front and back surfaces of the power storage device may be used. Alternatively, the filler 195 may have a layer having rubber elasticity. If the filler 195 is made of the same material as the layer 531 having rubber elasticity, the hardness of the filler 195 and the layer 531 having rubber elasticity can be improved. This results in a good bond after curing, and a substantially seamless member having rubber elasticity can be formed. Then, the battery unit 120 is turned over together with the rubber elastic layer 531, The battery unit 120 is inserted into the filler 195 in the recess 522 without the rubber elastic layer 531 interposed therebetween. The battery unit 120 is placed on the filler 195 in the recess 522 so that the battery unit 120 faces the filler 195 . At this time, care must be taken to prevent air bubbles from getting trapped between the battery unit 120 and the filler 195 .

[0243] FIG. 24(A) shows the battery unit 120 placed on the filler 195 in the recess 522. 24(B) is a perspective view showing the area between the dashed dotted line X1-X2 in FIG. 24(C) shows a cross section taken along the dashed line Y1-Y2.

[0244] The thickness t2 after hardening is determined by the amount of filler 195 (FIG. 25(B)). The amount of filler 195 is determined so that at least the end of the battery unit 120 is covered. Just do it.

[0245] Thereafter, the filler 195 in the recess 522 is hardened. The hardened filler 195 has rubber elasticity. The layer 531 is bonded to the rubber layer 532 to form an integrated member 109 having rubber elasticity. After the rubber elastic member 109 is formed, the rubber elastic member 109 and the battery unit 12 0 is extracted from the structure 521 (FIG. 25(A)). 1 shows a cross-sectional view taken along the dashed dotted line Y1-Y2.

[0246] <Example 4 of manufacturing method of power storage device> In the fourth example of the method for manufacturing the power storage device, a concave-convex structure is provided only on one surface of the power storage device.

[0247] FIG. 26A shows a structure 551 used for manufacturing a power storage device. 26(A) is an enlarged view of the area 65 shown in FIG. 26(A). A cross-sectional view between the dashed line Y3 and Y4 is shown in FIG. 26(C), and a cross-sectional view between the dashed line Y3 and Y4 is shown in FIG. 26(D). 26(E) shows an enlarged view of the region 66 shown in FIG. 26(D).

[0248] The structure 551 has a recess 552. The recess 552 is provided with a concave-convex structure 552a. There are.

[0249] The uneven structure 552a is not limited to a structure having a plurality of recesses. , may have a plurality of protrusions.

[0250] The depth d2 of the recess 552 is preferably equal to or greater than the thickness T. For example, the thickness t3 is 70 μm, When the thickness t1 and the thickness t2 are 100 μm, the depth d2 can be set to 270 μm or more. It is preferable that the depth d2 of the recess 552 does not include the depth of the recess of the concave-convex structure 552a. do not have.

[0251] For example, a mold or the like can be used for the structure 551. The material is not limited to metal. The structure 551 may be made of glass, ceramics, organic resin, wood, etc. Materials such as , may also be used.

[0252] First, filler 195 is placed in recess 552. Then, filler 195 is hardened to have rubber elasticity. The filling amount of the filler 195 is determined based on the amount of the rubber to be produced (FIG. 27(A)). This can be determined depending on the thickness t1 of the elastic layer 531 (FIGS. 27(B) and 27(C)). An enlarged view of the region 67 shown in FIG. 27(C) is shown in FIG. 27(D).

[0253] Next, the battery unit 120 is placed on the layer 531 having rubber elasticity in the recess 552 (see FIG. 28) At this time, make sure that no air bubbles are trapped between the battery unit 120 and the rubber-elastic layer 531. Be careful not to do so.

[0254] FIG. 29(A) shows a state in which the battery unit 120 is placed on a layer 531 having rubber elasticity. 29(B) is a perspective view of the portion between the dashed line X3-X4 in FIG. A cross-sectional view taken along the dashed line Y3-Y4 is shown in FIG. 29(C).

[0255] Next, the recess 552 is filled with the filler 195, and the battery unit 120 is covered with the filler 195. The filler 195 to be filled here may be made of the same material as the layer 531 having rubber elasticity, or may be made of a different material. The filler 195 to be filled may be the same material as the layer 531 having rubber elasticity. If the filler 195 and the layer 531 having rubber elasticity are made of the same material, the bonding between the filler 195 and the layer 531 having rubber elasticity after hardening is good. As a result, a substantially seamless member having rubber elasticity can be formed.

[0256] 30(A) is a perspective view showing a state in which the recess 552 is filled with the filler 195. FIG. 30(B) is a cross-sectional view taken along the dashed line X3-X4 in FIG. 30(A), and FIG. 30(C) is a cross-sectional view taken along the dashed line X3-X4 in FIG. 1 shows a cross-sectional view taken along the dashed line Y3-Y4. The thickness t2 is determined by the amount of filler 195. The amount of filler 195 to be filled is determined as follows (FIG. 31(B)). It is only necessary to determine the thickness so that the end of the outlet 120 is covered.

[0257] Thereafter, the filler 195 in the recess 552 is hardened. The hardened filler 195 has rubber elasticity. The layer 531 is bonded to the layer 531 to form an integrated member 109 having rubber elasticity. After that, the rubber elastic member 109 and the battery unit 120 are removed from the structure 551. (Fig. 31(A)). Fig. 31(B) shows a cross section taken along the dashed line Y3-Y4 in Fig. 31(A). The figure is shown.

[0258] <Example 5 of manufacturing method of power storage device> In the examples 1 to 4 of the manufacturing method of the power storage device, a structure having a concave-convex structure in the concave portion was used. One embodiment is not limited to this. For example, a structure having no concave-convex structure in the recess may be used. Then, after covering the battery unit 120 with a member 109 having a flat surface and rubber elasticity, Alternatively, the member 109 having rubber elasticity may be scraped with a sharp blade or the like to form the uneven structure. For example, the uneven structure may be formed using a hot wire cutter, an ultrasonic cutter, or the like.

[0259] As described above, by using the manufacturing method exemplified in this embodiment, a battery unit can be manufactured using a member having rubber elasticity. This allows the unit and light-emitting unit to be covered, preventing impurities such as moisture from the atmosphere. This can suppress penetration and improve the reliability of the device. Therefore, it is possible to realize a device that is less likely to be damaged even if the device is damaged.

[0260] This embodiment mode can be combined with other embodiment modes as appropriate.

[0261] (Fourth embodiment) In this embodiment, a battery unit that can be used in a power storage device of one embodiment of the present invention will be described. 32 to 43. The battery unit according to one aspect of the present invention comprises: The present invention is not limited to the configuration exemplified in this embodiment, and various shapes and forms can be applied.

[0262] In this embodiment, a lithium ion secondary battery will be described as an example, but the present invention is not limited to this. One aspect of the present invention is a battery, a primary battery, a secondary battery, a lithium-air battery, a lead-acid battery, a lithium Sum-ion polymer secondary battery, nickel-metal hydride battery, nickel-cadmium battery, Nickel-iron battery, nickel-zinc battery, silver oxide-zinc battery, solid-state battery, air battery, Zinc-air battery, capacitor, lithium-ion capacitor, electric double layer capacitor, ultra It may be applied to capacitors, supercapacitors, etc.

[0263] <Configuration example 1> FIG. 32(A) shows the battery unit 500. In FIG. 32(A), As an example, a thin storage battery is shown, but the present invention is not limited to this. A storage battery using the above-mentioned compound or a cylindrical or coin-shaped storage battery is used in the power storage device of one embodiment of the present invention. May be applied.

[0264] As shown in FIG. 32(A), the battery unit 500 includes a positive electrode 503, a negative electrode 506, a separator The battery unit 500 has a positive electrode lead 510 and a negative electrode lead 511. It may have a pole lead 511 .

[0265] 33(A) and (B) show examples of cross-sectional views taken along the dashed line A1-A2 in FIG. 32(A). 33(A) and (B) show a pair of a positive electrode 503 and a negative electrode 506. 1 and 2 show the cross-sectional structure of the battery unit 500.

[0266] As shown in FIGS. 33(A) and 33(B), the battery unit 500 includes a positive electrode 503, a negative electrode 506, The battery includes a separator 507, an electrolyte 508, and an exterior body 509. The separator 507 is The area surrounded by the exterior body 509 is filled with the electrolyte 50 It is filled with 8.

[0267] The positive electrode 503 includes a positive electrode active material layer 502 and a positive electrode current collector 501. It includes an active material layer 505 and a negative electrode current collector 504. The active material layer is formed on one or both sides of the current collector. The separator 507 is disposed between the positive electrode current collector 501 and the negative electrode current collector 504. Located.

[0268] The battery unit has one or more positive electrodes and one or more negative electrodes. It is also possible to have a laminated structure consisting of several positive electrodes and several negative electrodes.

[0269] FIG. 34(A) shows another example of a cross-sectional view taken along the dashed dotted line A1-A2 in FIG. 32(A). FIG. 34B shows a cross-sectional view taken along the dashed line B1-B2 in FIG.

[0270] 34(A) and (B) show a battery unit fabricated using multiple pairs of positive electrodes 503 and negative electrodes 506. The cross-sectional structure of the battery unit 500 is shown. There is no limit to the number of electrode layers that the battery unit 500 has. When the number of electrode layers is large, the power storage device can have a larger capacity. When the number of capacitors is small, the power storage device can be thin and highly flexible.

[0271] 34(A) and (B), a positive electrode having a positive electrode active material layer 502 on one side of a positive electrode current collector 501 is shown. and two positive electrodes 503 each having a positive electrode active material layer 502 on both sides of a positive electrode current collector 501. In addition, in an example using three negative electrodes 506 each having a negative electrode active material layer 505 on both sides of a negative electrode current collector 504, That is, the battery unit 500 has six positive electrode active material layers 502 and six negative electrode active material layers 503. 34(A) and (B) show an example in which the separator 507 is in a bag shape. However, the separator 507 is not limited to this, and may be a strip or a bellows shape. stomach.

[0272] Next, Fig. 32(B) shows an external view of the positive electrode 503. The positive electrode 503 is composed of a positive electrode current collector 501 and and a positive electrode active material layer 502.

[0273] 32(C) shows an external view of the negative electrode 506. The negative electrode 506 is made up of a negative electrode current collector 504 and a and a negative electrode active material layer 505 .

[0274] Here, the positive electrode 503 and the negative electrode 506 are stacked together by a plurality of positive electrodes or a plurality of negative electrodes. For electrical connection, it is preferable to have a tab region. It is preferable to electrically connect the boards.

[0275] As shown in FIG. 32(B), the positive electrode 503 preferably has a tab region 281. A portion of the tab region 281 is preferably welded to the positive electrode lead 510. It is preferable that the positive electrode current collector 501 has an exposed region. By welding the positive electrode lead 510 to the area where the positive electrode lead 510 is located, the contact resistance can be reduced. In addition, in FIG. 32(B), the positive electrode current collector 501 is exposed over the entire area of ​​the tab region 281. However, the tab region 281 may have a positive electrode active material layer 502 in a part thereof.

[0276] As shown in FIG. 32(C), the negative electrode 506 preferably has a tab region 282. A portion of the tab region 282 is preferably welded to the negative electrode lead 511. It is preferable that the negative electrode current collector 504 is exposed in a region. By welding the negative electrode lead 511 to the region where the negative electrode lead 511 is located, the contact resistance can be further reduced. In addition, in FIG. 32(C), the negative electrode current collector 504 is exposed over the entire area of ​​the tab region 282. 10, the tab region 282 may have a negative electrode active material layer 505 in a part thereof.

[0277] In addition, FIG. 32(A) shows an example in which the ends of the positive electrode 503 and the negative electrode 506 are roughly aligned. The positive electrode 503 may have a portion located outside the end of the negative electrode 506 .

[0278] In the battery unit 500, the area of ​​the negative electrode 506 that does not overlap with the positive electrode 503 is small. The more the better.

[0279] FIG. 33A shows an example in which the end of the negative electrode 506 is located inside the positive electrode 503. By adopting such a configuration, the negative electrode 506 is entirely overlapped with the positive electrode 503, or the positive electrode 503 of the negative electrode 506 is overlapped with the positive electrode 503. The area of ​​the region that does not overlap with the pole 503 can be reduced.

[0280] Alternatively, in the battery unit 500, the areas of the positive electrode 503 and the negative electrode 506 are approximately the same. For example, a positive electrode 503 and a negative electrode 506 facing each other with a separator 507 interposed therebetween are preferably For example, the areas of the two electrodes facing each other with the separator 507 in between are preferably approximately the same. It is preferable that the area of ​​the positive electrode active material layer 502 and the area of ​​the negative electrode active material layer 505 are approximately the same. stomach.

[0281] For example, as shown in FIGS. 34(A) and 34(B), the surface of the positive electrode 503 on the separator 507 side It is preferable that the area of ​​the surface of the negative electrode 506 facing the separator 507 is approximately the same as that of the positive electrode 506. The area of ​​the surface of the negative electrode 503 on the negative electrode 506 side is approximately the same as the area of ​​the surface of the negative electrode 506 on the positive electrode 503 side. By doing so, the area of ​​the negative electrode 506 that does not overlap with the positive electrode 503 is reduced (or ideally This can reduce the irreversible capacity of the battery unit 500. 34(A) and (B), the separator of the positive electrode active material layer 502 The area of ​​the surface of the negative electrode active material layer 505 on the separator 507 side is approximately the same as the area of ​​the surface of the negative electrode active material layer 505 on the separator 507 side. It is preferable that the same.

[0282] As shown in FIGS. 34(A) and 34(B), the end of the positive electrode 503 and the end of the negative electrode 506 are roughly It is preferable that the edges of the positive electrode active material layer 502 and the negative electrode active material layer 505 are approximately aligned. It is preferable.

[0283] FIG. 33B shows an example in which the end of the positive electrode 503 is located inside the negative electrode 506. By adopting such a configuration, the positive electrode 503 is completely overlapped with the negative electrode 506, or the positive electrode 50 The area of ​​the region that does not overlap with the negative electrode 506 of the third electrode can be reduced. If the electrode is positioned inside the end of the positive electrode 503, the current may concentrate at the end of the negative electrode 506. For example, when the current is concentrated in a part of the negative electrode 506, lithium may be deposited on the negative electrode 506. The area of ​​the positive electrode 503 that does not overlap with the negative electrode 506 is reduced. This can prevent current from concentrating on a part of the negative electrode 506. This is preferable because it can suppress the deposition of lithium on the negative electrode 506.

[0284] As shown in FIG. 32(A), the positive electrode lead 510 can be electrically connected to the positive electrode 503. Similarly, the negative electrode lead 511 is preferably electrically connected to the negative electrode 506. The positive electrode lead 510 and the negative electrode lead 511 are exposed to the outside of the exterior body 509 and are electrically connected to the outside. It functions as a terminal for obtaining electrical contact.

[0285] Alternatively, the positive electrode current collector 501 and the negative electrode current collector 504 may serve as terminals for electrical contact with the outside. In this case, the positive electrode current collector 501 and the negative electrode current collector 502 can be connected without using an electrode lead. The electrode current collector 504 may be disposed so that a part of it is exposed to the outside from the exterior body 509 .

[0286] In addition, in FIG. 32(A), the positive electrode lead 510 and the negative electrode lead 511 are connected to the battery unit 500. 35, the positive electrode lead 510 and the negative electrode lead 51 1 may be arranged on different sides of the battery unit 500. The pond unit allows for free placement of electrode leads, allowing for a high degree of freedom in design. This allows for greater freedom in designing products that use the battery unit of one embodiment of the present invention. Furthermore, productivity of products using the battery unit of one embodiment of the present invention can be improved.

[0287] The components of the battery unit will be described in detail below.

[0288] <Current collector> The current collector may be any suitable material, as long as it exhibits high electrical conductivity without causing significant chemical changes within the storage device. There is no limitation. The positive electrode current collector and the negative electrode current collector may be made of, for example, stainless steel, gold, platinum, zinc, or iron. , nickel, copper, aluminum, titanium, tantalum, manganese and other metals, and their alloys, Alternatively, copper or stainless steel may be used. It may be coated with carbon, nickel, titanium, or the like. Al alloys with added elements that improve heat resistance, such as neodymium, scandium, and molybdenum. Aluminum alloys can be used, or react with silicon to form silicides. The current collector may be formed of a metal element. A metal element that reacts with silicon to form a silicide. These include zirconium, titanium, hafnium, vanadium, niobium, tantalum, and chromium. , molybdenum, tungsten, cobalt, nickel, etc.

[0289] On the surface of the current collector, an irreversible reaction with the electrolyte may occur. It is preferable that the reactivity with the electrolyte is low. For example, by using stainless steel for the current collector, This is preferable because it may be possible to further reduce the reactivity with the electrolyte.

[0290] The positive electrode current collector and the negative electrode current collector are each in the form of a foil, a plate (sheet), a mesh, a cylinder, or the like. Shape: sheet, coil, punched metal, expanded metal, porous, and nonwoven fabric Furthermore, the adhesiveness to the active material layer can be improved. To achieve this, the positive electrode current collector and the negative electrode current collector may each have fine irregularities on their surfaces. The thickness of the positive electrode current collector and the negative electrode current collector is 5 μm or more and 30 μm or less. It is recommended to use the following.

[0291] An undercoat layer may be provided on a part of the surface of the current collector. The purpose of this is to reduce the contact resistance between the current collector and the active material layer or to improve the adhesion between the current collector and the active material layer. The undercoat layer is not formed on the entire surface of the current collector. The undercoat layer may be formed in an island shape (partially). The undercoat layer may be made of, for example, a carbon material. Examples of carbon materials include carbon black such as acetylene black, carbon black, Carbon nanotubes, graphite, etc. can be used as the undercoat layer. Metal layers, layers containing carbon and polymers, and layers containing metal and polymers can also be used. .

[0292] ≪Active material layer≫ The active material layer contains an active material. The active material is a material that is involved in the insertion and desorption of ions, which act as carriers. However, in this specification, in addition to the material that is originally an "active material," it also refers to conductive additives and binders. The layer including the adhesive is also called the active material layer.

[0293] The positive electrode active material layer contains one or more positive electrode active materials. The negative electrode active material layer contains one or more negative electrode active materials. It has an active material.

[0294] The positive electrode active material and the negative electrode active material play a central role in the battery reaction of the energy storage device and are the carrier ions. To extend the life of the power storage device, the active material must be able to absorb and release charge. It is preferable that the capacity of the material involved in the irreversible reaction is small, and that the material has high charge / discharge efficiency. It is preferable that

[0295] The positive electrode active material is a material that can insert and extract carrier ions such as lithium ions. The positive electrode active material can be, for example, a material having an olivine type crystal structure or a layered rock salt type crystal structure. Examples of such materials include those having a crystalline structure, a spinel crystalline structure, and a NASICON crystalline structure. This is the case.

[0296] For example, as the positive electrode active material, compounds such as LiFeO2, LiCoO2, LiNiO2, LiMn2O 4, V2O5, Cr2O5, MnO2 can be used as materials.

[0297] Examples of materials having an olivine-type crystal structure include lithium-containing complex phosphates (general formula LiM PO4 (M is one or more of Fe(II), Mn(II), Co(II), Ni(II)) can be mentioned. Representative examples of the general formula LiMPO4 include LiFePO4, LiNiPO4 , LiCoPO4, LiMnPO4, 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), LiFe c Ni d Co e PO4, LiFe c Ni d Mn e PO4, LiNi c Co d Mn e PO4 (c + d + e is 1 or less, 0 < c < 1, 0 < d < 1, 0 < e < 1), LiFe f Ni g Co h Mn i PO4 (f + g + h + i is 1 or less 0 < f < 1, 0 < g < 1, 0 < h < 1, 0 < i < 1), etc. can be mentioned.

[0298] For example, lithium iron phosphate (LiFePO4) has safety, stability, high capacity density, and high potential , the presence of lithium ions that can be extracted during initial oxidation (charging), etc., are required for the positive electrode active material. It is preferable because it satisfies the terms in a balanced manner.

[0299] By using LiFePO4 as the positive electrode active material, it is possible to withstand external loads such as overcharging. Therefore, for example, a stable and safe power storage device can be realized. As a power storage device used in mobile devices and wearable devices worn on the body, It is excellent at.

[0300] Examples of materials having a layered rock salt crystal structure include lithium cobalt oxide (LiCoO 2), LiNiO2, LiMnO2, Li2MnO3, LiNi 0.8 Co 0.2 O2 etc. NiCo system (general formula: LiNi x Co 1-x O2(0 <x<1))、LiNi 0.5 Mn 0.5 O2 etc. NiMn system (general formula: LiNi x Mn 1-x O2(0 <x<1)) , LiNi 1 / 3 Mn 1 / 3 Co 1 / 3 NiMnCo system (also called NMC) such as O2. The formula is LiNi x Mn y Co 1-x-y O2(x>0, y>0, x+y<1) Furthermore, Li(Ni 0.8 Co 0.15 Al 0.05 )O2, Li2MnO3-L iMO2 (M is Co, Ni or Mn) and the like are also included.

[0301] In particular, LiCoO2 has a large capacity and is more stable in the air than LiNiO2. It is preferable because it has advantages such as being more thermally stable than LiNiO2.

[0302] Examples of materials having a spinel-type crystal structure include LiMn2O4, Li 1+x Mn 2-x O4(0 <x<2)、LiMn 2-x Al x O4(0 <x<2)、LiMn 1.5 Ni 0.5 Examples include O4.

[0303] A material with a spinel-type crystal structure containing manganese, such as LiMn2O4, and a small amount of nickel Lithium Nitride (LiNiO2 or LiNi 1-x M x O2(0 <x<1)(M=Co、A Mixing with other additives such as manganese elution and electrolyte decomposition has the advantage of suppressing the dissolution of manganese. Yes, and preferable.

[0304] Alternatively, the positive electrode active material may be a compound represented by the general formula Li (2-j) MSiO4 (M is Fe(II), M Lithium-containing complexes such as one or more of n(II), Co(II), and Ni(II), where 0≦j≦2 Silicates can be used. (2-j) A typical example of MSiO4 is L i (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 C o l SiO4, Li (2-j) Ni k Mn l SiO4 (where k + l is 1 or less, 0 < k < 1, 0 < l < 1), Li (2-j) Fe m Ni n Co q SiO4, Li (2-j) Fe m Ni n Mn q SiO4, Li (2-j) Ni m Co n Mn q SiO4 (where 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 SiO 4 (where r + s + t + u is 1 or less, 0 < r < 1, 0 < s < 1, 0 < t < 1, 0 < u < 1), etc. compounds are exemplified.

[0305] Alternatively, as the positive electrode active material, A x M2(XO4)3 (A = Li, Na, Mg, M = Fe, Mn, Ti, V, Nb, Al, X = S, P, Mo, W, As, Si) represented by the general formula NASICON - type compounds can be used. Examples of NASICON - type compounds include Fe 2(MnO4)3, Fe2(SO4)3, Li3Fe2(PO4)3, etc.

[0306] Alternatively, as the positive electrode active material, Li2MPO4F, Li2MP2O7, Li5MO4 (M = Fe, Mn) represented by the general formula, perovskite - type fluorides such as FeF3, Ti S2, metal chalcogenides (sulfides, selenides, tellurides) such as MoS2, LiMV Materials with an inverse spinel crystal structure such as O4 (M = Mn, Co, Ni), vanadate Compounds (V2O5, V6O 13 , LiV3O8, etc.), manganese oxides, organic sulfur compounds, etc. The following materials can be used.

[0307] Furthermore, a combination of the above materials may be used as the positive electrode active material. A solid solution of a combination of these materials can be used as the positive electrode active material. Co 1 / 3 Mn 1 / 3 Ni 1 / 3 A solid solution of O2 and Li2MnO3 was used as the positive electrode active material. It is possible.

[0308] In addition, the carrier ions are alkali metal ions other than lithium ions, alkaline earth metal ions, etc. In the case of ions, the positive electrode active material may be the above-mentioned lithium compound, lithium-containing complex phosphate, and In the lithium-containing complex silicates, lithium is replaced by an alkali metal (e.g., sodium , potassium, etc.), alkaline earth metals (e.g., calcium, strontium, barium, Compounds substituted with carriers such as beryllium, magnesium, etc. may also be used.

[0309] The average particle size of the primary particles of the positive electrode active material is preferably, for example, 5 nm or more and 100 μm or less.

[0310] For example, when a lithium-containing composite phosphate having an olivine structure is used as the positive electrode active material, In olivine, the diffusion path of lithium is one-dimensional, so lithium diffusion is slow. When using a lithium-containing composite phosphate with a phosphate structure, the positive electrode active material must be increased in order to increase the charge / discharge rate. The average particle size of the substance is preferably, for example, 5 nm or more and 1 μm or less. The specific surface area of ​​the active material is preferably 10 m 2 / g or more 50m 2 / g or less is recommended. .

[0311] Active materials with an olivine structure have a higher crystalline structure than active materials with a layered rock salt structure, for example. Compared to lithium-ion batteries, the structural changes that occur during charging and discharging are extremely small, and the crystalline structure is stable, so there is no risk of overcharging or other problems. When used as a positive electrode active material, it is possible to realize a highly safe energy storage device. It can be realized.

[0312] As the negative electrode active material, for example, a carbon-based material, an alloy-based material, or the like can be used.

[0313] Carbon materials include graphite, easily graphitizable carbon (soft carbon), and non-graphitizable carbon (hard carbon). graphene, carbon black, etc. Examples include mesocarbon microbeads (MCMB), coke-based artificial graphite, and pitch-based artificial graphite. There are artificial graphite such as graphite, and natural graphite such as spherical natural graphite. They come in scale-like or spherical shapes.

[0314] When lithium ions are inserted into graphite (when lithium-graphite intercalation compounds are formed), It exhibits a low potential similar to that of lithium metal (0.1V to 0.3V vs. Li / Li + This allows the lithium-ion secondary battery to exhibit a high operating voltage. Graphite has a relatively high capacity per unit volume, a small volume expansion, and is inexpensive. It is preferable because it has advantages such as higher safety compared to aluminum metals.

[0315] When the carrier ion is a lithium ion, the alloy material may be, for example, Mg, Ca , Ga, Si, Al, Ge, Sn, Pb, As, Sb, Bi, Ag, Au, Zn, Cd, Materials containing at least one of Hg, In, etc. can be used. Silicon has a higher capacity than carbon, and its theoretical capacity is 4200mAh / g. The capacity of the power storage device can be increased. Examples of the materials include Mg2Si, Mg2Ge, Mg2Sn, SnS2, V2Sn3, FeSn2, CoSn2, Ni3Sn2, Cu6Sn5, Ag3Sn, Ag3Sb, Ni 2MnSb, CeSb3, LaSn3, La3Co2Sn7, CoSb3, InSb, S bSn, etc.

[0316] In addition, the negative electrode active material is SiO, SnO, SnO2, titanium dioxide (TiO2), lithium Sodium titanium oxide (Li4Ti5O 12 ), lithium-graphite intercalation compound (Li x C6), Niobium pentoxide (Nb2O5), tungsten oxide (WO2), molybdenum oxide (MoO2 ) and other oxides can be used. Here, SiO is a compound containing silicon and oxygen. If the atomic ratio of silicon to oxygen is silicon:oxygen=α:β, α has a value close to β. Here, having a value close to the value of β means that, for example, the absolute value of the difference between α and β is close to the value of β. It is preferably 20% or less, more preferably 10% or less.

[0317] 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 is Co, Ni or Cu) can be used. For example, Li2. 6Co 0.4 N3 has a large charge / discharge capacity (900mAh / g, 1890mAh / cm 3 )of This is preferable.

[0318] When a composite nitride of lithium and a transition metal is used, the negative electrode active material contains lithium ions, The positive electrode active material is a combination of materials such as V2O5 and Cr3O8 that do not contain lithium ions. Even when a material containing lithium ions is used as the positive electrode active material, By first removing the lithium ions contained in the positive electrode active material, lithium is released as the negative electrode active material. A complex nitride of ammonium and a transition metal can be used.

[0319] In addition, a material that undergoes a conversion reaction can also be used as the negative electrode active material. , 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 that undergo a reaction include Fe2O3, CuO, Cu2O, RuO2, and Cr2O Third 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 Fluorides such as:

[0320] The average particle size of the primary particles of the negative electrode active material is preferably, for example, 5 nm or more and 100 μm or less.

[0321] The positive electrode active material layer and the negative electrode active material layer may each contain a conductive additive.

[0322] As the conductive additive, for example, a carbon material, a metal material, or a conductive ceramic material is used. In addition, a fibrous material may be used as the conductive additive. The content of the conductive additive is preferably 1 wt% or more and 10 wt% or less, and more preferably 1 wt% or more and 5 wt% or less. % or less is more preferable.

[0323] The conductive additive can form an electrically conductive network in the electrode. This allows the electrical conduction path between the negative electrode active materials to be maintained. By adding the agent, an active material layer having high electrical conductivity can be realized.

[0324] Examples of the conductive additive include natural graphite, artificial graphite such as mesocarbon microbeads, and carbon fiber. Examples of carbon fibers that can be used include mesophase pitch carbon fibers. Carbon fibers such as isotropic pitch-based carbon fibers can be used. Carbon nanofibers or carbon nanotubes can be used. The nanotubes can be produced by, for example, a vapor phase growth method. For example, carbon black (acetylene black (AB) etc.), graphite particles Carbon materials such as silicon, graphene, and fullerene can be used. Metal powder or metal fiber such as nickel, aluminum, silver, gold, or conductive ceramic Materials such as lacquer can be used.

[0325] Flaky graphene has excellent electrical properties, such as high conductivity, as well as flexibility and functionality. Graphene has excellent physical properties, such as mechanical strength, and is therefore used as a conductive additive. This can increase the electrical conductivity between the active materials or between the active material and the current collector.

[0326] In this specification, graphene refers to a single-layer graphene or a graphene having 2 to 100 layers. Single-layer graphene is a graphene consisting of a single atomic layer of carbon molecules with π bonds. Graphene oxide refers to a compound in which the graphene is oxidized. This is what is meant.

[0327] Graphene allows for surface contact with low contact resistance, and is conductive even when thin. The conductivity is so high that even a small amount can efficiently form a conductive path within the active material layer.

[0328] When using an active material with a small average particle size, for example, an active material with a particle size of 1 μm or less, the specific surface area of ​​the active material In such cases, the area is large and more conductive paths are required to connect the active materials. Graphene is used, which has extremely high conductivity and can efficiently form conductive paths even in small amounts. It is particularly preferred that

[0329] The positive electrode active material layer and the negative electrode active material layer may each contain a binder.

[0330] In this specification, the binder has the function of binding or adhering active materials together, and / or Alternatively, the binder has a function of binding or adhering the active material layer and the current collector. Or, during the fabrication of the battery, the state of the binder may change. For example, the binder may be liquid, solid, or The binder may be in at least one of the following states: a liquid, a gel, etc. During battery fabrication, the monomer may change into a polymer.

[0331] For example, a water-soluble polymer can be used as the binder. For example, polysaccharides can be used. Examples of polysaccharides include carboxymethyl cellulose. (CMC), methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, di Cellulose derivatives such as acetyl cellulose and regenerated cellulose, or starch, etc. may be used. This can be done.

[0332] In addition, styrene-butadiene rubber (SBR), styrene-isoprene rubber (SBR), etc. are used as binders. Styrene rubber, acrylonitrile butadiene rubber, butadiene rubber, fluororubber, ethylene Rubber materials such as ethylene-propylene-diene copolymers can be used. These rubber materials may be used in combination with the water-soluble polymers described above. It has a high elasticity and is therefore prone to expansion and contraction due to the expansion and contraction of the active material during charging and discharging, or bending of the electrode. On the other hand, it has a hydrophobic group and is soluble in water. In such cases, the particles may be dispersed in an aqueous solution without dissolving in water. Therefore, the composition containing the solvent used to form the active material layer 102 (also referred to as an electrode mixture composition) It can be difficult to raise the viscosity of the paint to a level suitable for application. The use of highly functional water-soluble polymers, such as polysaccharides, has the effect of moderately increasing the viscosity of the solution. It is expected that the rubber material and the polymer will be dispersed uniformly, and a good electrode with high uniformity, such as a battery, can be produced. An electrode with high uniformity in electrode film thickness or electrode resistance can be obtained.

[0333] Alternatively, PVdF, polystyrene, polymethyl acrylate, polymethacrylate, etc. may be used as a binder. Methyl polyacrylate (PMMA), sodium polyacrylate, polyvinyl alcohol (PVA) , polyethylene oxide (PEO), polypropylene oxide, polyimide, polyvinyl chloride Nyl, polytetrafluoroethylene, polyethylene, polypropylene, isobutylene, Polyethylene terephthalate, nylon, polyacrylonitrile (PAN), polyvinyl chloride chloride, ethylene propylene diene polymer, polyvinyl acetate, polymethyl methacrylate Materials such as cellulose acetate and nitrocellulose can be used.

[0334] Two or more of the above binders may be used in combination.

[0335] The content of the binder relative to the total amount of the active material layer is preferably 1 wt% or more and 10 wt% or less, The content is more preferably from 3 wt% to 8 wt% and even more preferably from 3 wt% to 5 wt%.

[0336] ≪Electrolyte≫ The solvent of the electrolytic solution 508 is preferably an aprotic organic solvent, for example, ethylene glycol. Carbonate (EC), Propylene Carbonate (PC), Butylene Carbonate, Chloride Ethylene carbonate, vinylene carbonate (VC), γ-butyrolactone, γ-valerolactone Lactone, dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl Methyl carbonate (EMC), methyl formate, methyl acetate, methyl butyrate, 1,3-diox San, 1,4-dioxane, dimethoxyethane (DME), dimethyl sulfoxide, diethylene ethyl ether, methyl diglyme, acetonitrile, benzonitrile, tetrahydrofuran one of sultone, sulfolane, sultone, or any combination of two or more of these. It can be used in various ratios.

[0337] In addition, a flame-retardant and non-volatile ionic liquid (room-temperature molten salt) was used as the solvent for the electrolyte. Or, by using multiple batteries, the internal temperature of the storage device may rise due to an internal short circuit or overcharging. Even if the battery is used, the battery can be prevented from exploding or catching fire. The electrolyte solution is made of tetravalent cations and anions. ammonium cations, tertiary sulfonium cations, and quaternary phosphonium cations Aliphatic onium cations such as the above, as well as imidazolium cations and pyridinium cations The following aromatic cations are also used as anions in electrolytes: monovalent amide-based Anions, monovalent methide anions, fluorosulfonate anions, perfluoroalkanes perfluoroalkyl borate anion, tetrafluoroborate anion, perfluoroalkyl bo ... phosphate anion, hexafluorophosphate anion, or perfluoroalkylphosphate anions, etc.

[0338] In addition, when lithium ions are used as a carrier, the electrolyte to be dissolved in the solvent is , such as LiPF6, LiClO4, LiAsF6, LiBF4, LiAlCl4, Li SCN, LiBr, LiI, Li2SO4, Li2B 10 Cl 10 , Li2B 12 Cl1 2, LiCF3SO3, LiC4F9SO3, LiC(CF3SO2)3, LiC(C2 F5SO2)3, LiN(CF3SO2)2, LiN(C4F9SO2)(CF3SO2 ), LiN(C2F5SO2)2, or two or more of these lithium salts Any combination and ratio may be used.

[0339] In addition, the electrolyte used in the electricity storage device is free from granular waste or elements other than the constituent elements of the electrolyte (hereinafter, It is preferable to use a highly purified electrolyte solution with a low content of impurities. Specifically, the weight ratio of impurities to the electrolyte is 1% or less, preferably 0.1% or less. More preferably, it is set to 0.01% or less.

[0340] In addition, the electrolyte contains vinylene carbonate (VC), propane sultone (PS), tert- Butylbenzene (TBB), fluoroethylene carbonate (FEC), LiBOB, etc. The concentration of the additive may be, for example, 0.1 wt % or more relative to the total solvent. Not more than 5 wt%.

[0341] Alternatively, a polymer gel electrolyte may be used in which a polymer is swollen with an electrolytic solution.

[0342] Examples of the polymer include polyalkylene oxides such as polyethylene oxide (PEO). Polymers with a hexafluoroethylene structure, such as PVdF and polyacrylonitrile, and copolymers containing these For example, a copolymer of PVdF and hexafluoropropylene (HFP) can be used. The polymer PVdF-HFP can be used. It may have a porous shape.

[0343] Alternatively, a polymerization initiator and a crosslinking agent may be added to the electrolytic solution to gel the electrolytic solution. Polymerizable functional groups are introduced into the cations or anions that make up the ionic liquid, and a polymerization initiator is used. The ionic liquid itself may be polymerized by polymerizing them. The liquid may be gelled with a cross-linking agent.

[0344] In addition, a solid electrolyte having an inorganic material such as a sulfide or oxide in combination with an electrolytic solution is also used. solid electrolytes, or polymeric materials such as PEO (polyethylene oxide) For example, a solid electrolyte may be formed on the surface of the active material layer. When using a combination of electrolytes, the installation of separators and spacers may not be necessary. be.

[0345] In addition, by using a polymer material that gels as a solvent for the electrolyte, safety against leakage etc. is improved. Safety is improved. In addition, it is possible to make the power storage device thinner and lighter. For example, polyethylene Oxide-based, polyacrylonitrile-based, polyvinylidene fluoride-based, polyacrylate-based, Polymethacrylate polymers can be used. It is preferable to use a polymer that can gel the solution. Alternatively, a silicone gel or the like can be used. In this specification and the like, for example, the term "polyvinylidene fluoride polymer" refers to a polyvinylidene fluoride polymer. It means a polymer containing polyvinylidene fluoride (PVDF), and poly(vinylidene fluoride-hexyl fluoride) Poly(hexafluoropropylene) copolymers, etc.

[0346] The above polymers can be determined by using an FT-IR (Fourier transform infrared spectrophotometer) or the like. For example, polyvinylidene fluoride polymers can be analyzed by FT-IR. The spectrum shows absorption indicating C—F bonds. The FT-IR spectrum shows absorption indicative of a C≡N bond.

[0347] <Separator> The separator 507 may be made of paper, nonwoven fabric, glass fiber, ceramics, or nylon ( Polyamide), Vinylon (polyvinyl alcohol fiber), polyester, acrylic, Synthetic fibers such as polyethylene and polyurethane can be used. 7 may have a single layer structure or a laminated structure.

[0348] More specifically, the separator 507 may be made of, for example, a fluorine-based polymer, polyethylene oxide, or the like. Polyethers such as olefins, polypropylene oxide, polyethylene, polypropylene, etc. Polyolefin, Polyacrylonitrile, Polyvinylidene chloride, Polymethyl methacrylate , polymethyl acrylate, polyvinyl alcohol, polymethacrylonitrile, polyvinyl Acetate, Polyvinylpyrrolidone, Polyethyleneimine, Polybutadiene, Polystyrene Polyethylene, polyisoprene, polyurethane polymers and their derivatives, cellulose, paper, non-woven fabrics One material selected from woven fabric and glass fiber can be used alone or in combination of two or more. Cut.

[0349] <Exterior body> The surface of the exterior body 509 that comes into contact with the electrolyte 508, i.e., the inner surface, has a significant reaction with the electrolyte 508. It is preferable that the battery unit 500 does not undergo any reaction. If moisture gets into the electrolyte 508, a reaction may occur between the components of the electrolyte 508 and the water. It is preferable that the exterior body 509 has low moisture permeability.

[0350] The exterior body 509 is made of, for example, polyethylene, polypropylene, polycarbonate, iono Flexible materials such as aluminum, stainless steel, copper, and nickel are applied to a film made of acrylic or polyamide. A thin metal film having excellent heat resistance is provided on the thin metal film, and a polyamide resin is further provided on the outer surface of the exterior body. A three-layer film having an insulating synthetic resin film such as a polyester resin may be used. This three-layer structure not only blocks the permeation of electrolyte and gas, The outer casing is folded inward and stacked, or By stacking the two exterior bodies with their inner surfaces facing each other and applying heat, the inner material The two exterior bodies are fused together, forming a sealed structure.

[0351] The battery unit 500 has a flexible structure by using a flexible exterior body 509. If the structure is flexible, the flexible portion can be at least It can be mounted on a power storage device or electronic device that has a part of it, and the power storage device or electronic device can be modified. The battery unit 500 can be bent accordingly.

[0352] <Configuration example 2> FIG. 36(A) shows a perspective view of the secondary battery 200, and FIG. 36(B) shows a top view of the secondary battery 200. Shows.

[0353] FIG. 37(A) shows a cross-sectional view taken along the dashed line C1-C2 in FIG. 36(B). 36(B) shows a cross-sectional view taken along the dashed line C3-C4 in FIG. 36(B). ) and (B), some of the components are selectively shown for clarity.

[0354] The secondary battery 200 includes a positive electrode 211, a negative electrode 215, and a separator 203. The battery 200 further includes a positive electrode lead 221 , a negative electrode lead 225 , and an outer casing 207 .

[0355] The positive electrode 211 and the negative electrode 215 each have a current collector and an active material layer. The negative electrodes 215 are arranged so that the active material layers face each other with the separator 203 interposed therebetween. There are.

[0356] The electrodes (positive electrode 211 and negative electrode 215) of the secondary battery 200 are located on the inner diameter side of the curve. It is preferable that the one positioned on the outer diameter side is longer in the direction of curvature than the one positioned on the outer diameter side. With this configuration, when the secondary battery 200 is bent at a certain curvature, the positive electrode 211 and the negative electrode 212 are In other words, all of the positive electrode active material layers of the positive electrode 211 can be aligned. All of the regions can be disposed facing the negative electrode active material layer of the negative electrode 215. Therefore, the positive electrode active material contained in the positive electrode 211 can be efficiently utilized in the battery reaction. Therefore, the capacity per volume of the secondary battery 200 can be increased. This is particularly effective when the curvature of the secondary battery 200 is fixed when the battery 200 is in use.

[0357] The positive electrode lead 221 is electrically connected to the plurality of positive electrodes 211. The negative electrode lead 225 is , and are electrically connected to the plurality of negative electrodes 215. The positive electrode lead 221 and the negative electrode lead 225 Each of the semiconductor devices has a sealing layer 220 .

[0358] The exterior body 207 includes a plurality of positive electrodes 211, a plurality of negative electrodes 215, and a plurality of separators 203. The secondary battery 200 contains an electrolyte (not shown) in the area covered by the exterior body 207. The secondary battery 200 is sealed by gluing three sides of the exterior body 207 together.

[0359] 37(A) and (B), a plurality of rectangular separators 203 are used to separate a positive electrode 211 and a negative electrode 2 15, one separator 203 is placed between each of the electrodes 15. It is not limited to folding a single sheet separator into a zigzag shape (it can also be called accordion-shaped). Alternatively, the separator may be wound around the positive electrode and the negative electrode so that the separator is located between the positive electrode and the negative electrode.

[0360] For example, a method for manufacturing a secondary battery 200 is shown in FIGS. FIG. 38 shows a cross-sectional view taken along the dashed line C1-C2 in FIG. 36(B) in this case.

[0361] First, the negative electrode 215 is placed on the separator 203 (FIG. 39(A)). The negative electrode active material layer of 215 is disposed so as to overlap with the separator 203 .

[0362] Next, the separator 203 is folded and placed on the negative electrode 215. Then, the positive electrode 211 is placed on the separator 203 (FIG. 39(B)). The positive electrode active material layer of the separator 201 is disposed so as to overlap the separator 203 and the negative electrode active material layer. When an electrode having an active material layer formed on one side of a current collector is used, the positive electrode 211 The positive electrode active material layer and the negative electrode active material layer of the negative electrode 215 are arranged opposite to each other with the separator 203 interposed therebetween. Place.

[0363] When the separator 203 is made of a material that can be heat-sealed, such as polypropylene, The overlapping area of ​​the electrodes 203 is thermally welded together, and then the next electrode is placed on top of it. Specifically, the electrode can be prevented from shifting during the process. In the region where the separators 203 overlap each other, for example, the region 203 in FIG. It is preferable to heat-weld the area indicated by a.

[0364] By repeating this process, the positive electrode 202 is formed with the separator 203 sandwiched between them as shown in FIG. 39(C). 211 and anode 215 can be stacked.

[0365] The separator 203 is repeatedly folded in advance, and a plurality of negative electrodes 215 and a plurality of negative electrodes 215 are attached to the separator 203. The positive electrodes 211 may be arranged so as to be sandwiched alternately.

[0366] Next, as shown in FIG. 39(C), a plurality of positive electrodes 211 and a plurality of negative electrodes are separated by a separator 203. Covers 215.

[0367] Furthermore, as shown in FIG. 39(D), in the region where the separators 203 overlap each other, for example, By thermally welding the region 203b shown in FIG. 39(D), a plurality of positive electrodes 211 and a plurality of negative electrodes 2 15 is covered with a separator 203 and bound.

[0368] The plurality of positive electrodes 211, the plurality of negative electrodes 215, and the separator 203 are bound together using a binding material. May be bundled.

[0369] In this process, the positive electrode 211 and the negative electrode 215 are stacked, and the separator 203 is In the separator 203, the area sandwiched between the positive electrode 211 and the negative electrode 215 and the area sandwiched between the positive electrode 211 and the negative electrode 215 are The electrode 211 and the region arranged to cover the plurality of negative electrodes 215 are also included.

[0370] In other words, the separator 203 of the secondary battery 200 shown in FIGS. 38 and 39(D) is A partially folded separator. Folded area of ​​separator 203 A plurality of positive electrodes 211 and a plurality of negative electrodes 215 are sandwiched between the positive electrodes 211 and the negative electrodes 215.

[0371] <Configuration example 3> FIG. 40(A) shows a perspective view of the secondary battery 250, and FIG. 40(B) shows a top view of the secondary battery 250. 40(C1) shows a cross-sectional view of the first electrode assembly 230, and FIG. 40(C2) shows a cross-sectional view of the first electrode assembly 230. ) shows a cross-sectional view of the second electrode assembly 231.

[0372] The secondary battery 250 includes a first electrode assembly 230, a second electrode assembly 231, and a separator. The secondary battery 250 further includes a positive electrode lead 221, a negative electrode lead 225, and and an exterior body 207.

[0373] As shown in FIG. 40(C1), the first electrode assembly 230 includes a positive electrode 211a, a separator 211b, and a 03, a negative electrode 215a, a separator 203, and a positive electrode 211a are laminated in this order. The positive electrode 211a and the negative electrode 215a each have an active material layer on both sides of a current collector. do.

[0374] As shown in FIG. 40(C2), the second electrode assembly 231 includes a negative electrode 215a, a separator 215b, and a 03, a positive electrode 211a, a separator 203, and a negative electrode 215a are laminated in this order. The positive electrode 211a and the negative electrode 215a each have an active material layer on both sides of a current collector. do.

[0375] That is, in the first electrode assembly 230 and the second electrode assembly 231, the positive electrode and the negative electrode are The active material layers are arranged so as to face each other with the separator 203 interposed therebetween.

[0376] The positive electrode lead 221 is electrically connected to the plurality of positive electrodes 211. The negative electrode lead 225 is , and are electrically connected to the plurality of negative electrodes 215. The positive electrode lead 221 and the negative electrode lead 225 Each of the semiconductor devices has a sealing layer 220 .

[0377] FIG. 41 shows an example of a cross-sectional view taken along the dashed line D1-D2 in FIG. 40(B). In order to clarify the diagram, only some of the components are shown in FIG.

[0378] As shown in FIG. 41, the secondary battery 250 includes a plurality of first electrode assemblies 230 and a plurality of second The electrode assembly 231 is covered with a wound separator 203.

[0379] The exterior body 207 includes a plurality of first electrode assemblies 230, a plurality of second electrode assemblies 231, and The secondary battery 200 has an electrolyte (see FIG. The secondary battery 200 is sealed by adhering three sides of the exterior body 207. are.

[0380] For example, a method for manufacturing a secondary battery 250 is shown in FIGS.

[0381] First, the first electrode assembly 230 is placed on the separator 203 (FIG. 42(A)).

[0382] Next, the separator 203 is folded and placed on the first electrode assembly 230. Next, two sets of first electrode plates are placed above and below the first electrode assembly 230 with separators 203 interposed therebetween. The two electrode assemblies 231 are stacked (FIG. 42(B)).

[0383] Next, the separator 203 is wound around the two sets of second electrode assemblies 231. Furthermore, two sets of first electrode assemblies 231 are disposed above and below the two sets of second electrode assemblies 231 via separators 203. The electrode assemblies 230 are then stacked (FIG. 42(C)).

[0384] Next, the separator 203 is wound around the two first electrode assemblies 230 (see FIG. 42(D)).

[0385] Through this process, a plurality of first electrode assemblies 230 and a plurality of second electrode assemblies 231 are stacked. To stack these electrode assemblies, they are arranged between spirally wound separators 203. It will be placed.

[0386] It is preferable that the outermost electrode does not have an active material layer on the outside.

[0387] In addition, in Figures 40(C1) and (C2), the electrode assembly has three electrodes and two separators. However, the present invention is not limited to this configuration. By increasing the number of electrodes, the capacity of the secondary battery 250 can be further improved. It is also possible to use a configuration with two electrodes and one separator. In this case, the secondary battery can be made more resistant to bending. Although the configuration having three sets of first electrode assemblies 230 and two sets of second electrode assemblies 231 has been shown, The present invention is not limited to this, and may have a configuration including more electrode assemblies. By increasing the number of cells, the capacity of the secondary battery 250 can be further improved. The fewer the electrode assemblies, the more resistant to bending the electrode assembly. The battery may be a secondary battery.

[0388] FIG. 43 shows another example of a cross-sectional view taken along the dashed dotted line D1-D2 in FIG. 40(B). As shown in FIG. 43, the separator 203 is folded in an accordion shape to form a first electrode assembly. A separator 203 may be disposed between 230 and the second electrode assembly 231 .

[0389] This embodiment mode can be combined with other embodiment modes as appropriate.

[0390] (Embodiment 5) In this embodiment, a power supply system capable of supplying power to a power storage device of one embodiment of the present invention will be described with reference to FIG. 44 to 47 will be used for explanation.

[0391] The power storage device of one embodiment of the present invention is not in contact with a power supply source (hereinafter also referred to as a power transmission device). In this state, power is supplied to the target (hereinafter also referred to as the power receiving device) (contactless power supply, wireless power supply, The power supply may be by a method such as wireless power supply. Examples include a resonance method, an electromagnetic induction method, and an electrostatic induction method.

[0392] In this embodiment, a power supply system in which power is supplied by a magnetic field resonance method will be described as an example. The magnetic resonance method involves resonator coupling of resonance coils provided in both the power transmitting device and the power receiving device. This is a method of forming an energy transmission path by using a It has a longer power supply distance compared to other methods (induction method, electrostatic induction method, etc.).

[0393] Here, the input impedance of the power receiving device may change depending on the charging state of the battery. In other words, the input impedance of the power receiving device may change dynamically during power supply. In this case, if the output impedance of the power transmitting device is constant, the impedance Therefore, in the case of power supply using the magnetic resonance method, It can be difficult to maintain high power supply efficiency throughout the entire process.

[0394] Therefore, the power receiving device of this embodiment is provided with a voltage (previous The voltage proportional to the externally input current (the latter voltage) is detected, and Based on these findings, a DC-DC converter with a configuration that maintains a constant ratio between the former voltage and the latter voltage is applies.

[0395] Specifically, the DC-DC converter included in the power receiving device of this embodiment converts the input voltage (first The first voltage is proportional to the input current (the DC voltage at the load) and the second voltage is proportional to the input current (the current across the load). By keeping the ratio to the voltage constant, it is possible to keep the input impedance constant. Furthermore, the DC-DC converter can perform impedance conversion. Therefore, the battery to be supplied with power is located on the output side of the DC-DC converter. Even if there is a DC-DC converter, it will operate regardless of the charging status of the battery. As a result, the input impedance of the DC-DC converter can be maintained. In a power supply by magnetic resonance method to a power receiving device having a converter and the battery, It is possible to maintain a high power supply efficiency throughout the power supply period.

[0396] <Power supply system> FIG. 44(A) shows an example of the configuration of a power supply system in which power is supplied by the magnetic field resonance method. The power supply system shown in FIG. 44(A) includes a power transmitting device 400 and a power receiving device 31 shown in FIG. 44(B). Furthermore, the power transmitting device 400 includes a high frequency power supply 401 that generates a high frequency voltage, A coil 402 to which a high frequency voltage generated by a high frequency power supply 401 is applied, and a coil 4 02 and a resonant coil 403 in which a high frequency voltage is induced by electromagnetic induction. The resonant coil 403 has stray capacitance 404 between the wires that make up the resonant coil 403. As shown in FIG. 44(A), the resonance coil 403 is directly connected to other components. It is preferable to have a configuration in which this is not the case.

[0397] <Power receiving device> FIG. 44(B) shows an example of the configuration of a power receiving device that receives power by the magnetic resonance method. The power receiving device 310 shown in (B) includes a resonant coil 3 in which a high-frequency voltage is induced by magnetic field resonance. 11, and a coil 312 in which a high frequency voltage is induced by electromagnetic induction with a resonant coil 311. a rectifier circuit 313 for rectifying the high frequency voltage induced in the coil 312; a DC-DC converter 314 to which a DC voltage to be output is input; The resonant coil has a battery 315 that is powered by the DC voltage output from the resonant coil. In the resonant coil 311, there exists a stray capacitance 316 between the wirings that form the resonant coil 311.

[0398] As shown in FIG. 44(B), the resonance coil 311 is directly connected to other components. If other components are directly connected to the resonance coil 311, The series resistance and capacitance of the resonant coil 311 become large. The Q value of the circuit including the resonant coil 311 and other components is In a configuration in which the resonant coil 311 is directly connected to other components, , the power supply efficiency is higher than that of a configuration in which the resonant coil 311 is not directly connected to other components. Because it will decrease.

[0399] The DC-DC converter 314 is a DC converter capable of maintaining a constant input impedance. Furthermore, the input impedance of the DC-DC converter 314 is , and is not dependent on the impedance of the battery 315 present on the output side. Impedance conversion is performed by the DC-DC converter 314. The input impedance of the DC-DC converter 314 is the same as the input impedance of the power receiving device 310. Therefore, even when the impedance of the battery 315 changes according to the charging status of the battery 315, the input impedance of the power receiving device 310 does not fluctuate. As a result, in the power receiving device 310, it is possible to perform power supply with high power supply efficiency without depending on the charging status of the battery 315. In the power supply system shown in Fig. <FIG. 44(A)>, the power receiving device 310 shown in Fig. <FIG. 44(B)> is applied as the power receiving device. Therefore, in the power supply system shown in Fig. <FIG. 44(A)>, it is possible to perform power supply without considering the fluctuation of the input impedance in the power receiving device. That is, in the power supply system shown in Fig. <FIG. 44(A)>, it is possible to perform power supply with high power supply efficiency without dynamically changing the power supply conditions. Next, an example of the configuration of a DC-DC converter applicable as the DC-DC converter 314 will be illustrated.

[0400]

[0401]

[0402]

[0403] <000263,<DC-DC Converter Configuration Example> Fig. <FIG. 45(A)> is a diagram showing a configuration example of a DC-DC converter. The DC-DC converter shown in Fig. <FIG. 45(A)> has an input power detection unit 1000 to which a DC voltage (V_In) is input, and a voltage conversion unit 2000 that converts the DC voltage (V_In) into a DC voltage (V_Out) and outputs it.

[0403] Figs. <FIG. 45(B)> and <FIG. 45(C)> are diagrams showing a configuration example of the input power detection unit 1000 shown in Fig. <FIG. 45(A)>. The input power detection unit 1000 shown in Fig. <FIG. 45(B)> has one end electrically connected to the high-potential side input node. a load 1003 whose other end is electrically connected to the voltage conversion unit 2000; means 1001 for detecting a voltage (V_1001) proportional to a DC voltage (V_In); A means for detecting a voltage (V_1002) proportional to the current (I_1003) occurring in 1003 1002. The voltage (V_1001) detected by the means 1001 and The voltage (V_1002) detected by the means 1002 is input to the voltage conversion unit 2000. Furthermore, the input power detection unit 1000 shown in FIG. 45(C) detects that one end of the load 1003 is at a low voltage. 45(B) except that it is electrically connected to the input node of the input power detection unit 1 45B and 45C, in one embodiment of the present invention, In this case, the load 1003 of the input power detection unit 1000 is connected to the high-potential input node or the low-potential input node. It is provided so as to be electrically connected to one of the input nodes.

[0404] FIG. 45(D) is a diagram showing an example of the configuration of the voltage conversion unit 2000 shown in FIG. 45(A). 5(D) is a voltage conversion unit 2000 that converts the current generated in the load 1003 in response to switching. and a switch 2002 that controls the voltage (V_1001) and the voltage (V_1002). and means 2001 for controlling the switching of the switch 2002.

[0405] The voltage conversion unit 2000 shown in FIG. 45(D) may be of a boost type, a flyback type, an inverting type, or a A circuit having a voltage conversion circuit such as a voltage converter of the type and a means 2001 is applied, and the voltage conversion circuit includes The switch included in the switch 2002 can be used as the switch 2002.

[0406] In the DC-DC converter shown in FIG. 45(A), the input voltage (input DC voltage ( Even when (V_In) fluctuates, the input impedance can be kept constant by controlling the input current (the current (I_10 03) generated in load 1003). Specifically In the DC-DC converter shown in FIGS. 45(A) to (D), the current (I_1003) generated in load 1003 can be controlled by the switching of switch 2002 and the switching of switch 2002 is controlled by means 2001 Here, means 2001 controls the switching of switch 2002 based on the voltage (V_1001) detected by means 1001 and the voltage (V_1002) detected by means 1002 That is, means 2001 controls the switching of switch 2002 based on the voltage (V_ 1001) proportional to the input voltage and the voltage (V_1002) proportional to the input current Therefore, in the DC-DC converter shown in FIGS. 45(A) to (D), by designing such that the ratio of the voltage (V_1 001) to the voltage (V_1002) is kept constant by the switching of switch 2002 by means 2001, the input in pedance can be kept constant

[0407] <An Example of a DC-DC Converter> FIG. 46(A) is a diagram showing an example of a DC-DC converter. The DC -DC converter shown in FIG. 46(A) includes a load 4 whose one end is electrically connected to the high-potential side input node, and a switch 5 whose one end is electrically connected to the other end of load 4, and an inductor 6 whose one end is electrically connected to the other end of switch 5 and whose other end is electrically connected to the high-potential side output node, and[[ID=​​​The output node and the low-potential output node are electrically connected to each other (hereinafter also referred to as being grounded). The load 4 may be a resistive load or an inductive load. The switches 5 and 7 may be transistors or relays. The inductor 6 may be an air-core coil or a cored coil. It is possible to apply

[0408] Furthermore, the DC-DC converter shown in FIG. 46(A) has an input DC voltage (V_In) means 1 for detecting a voltage (V_1) proportional to the current (I_4) generated in the load 4; a means 2 for detecting a voltage (V_2) corresponding to the voltage (V_1) and a means 3 for detecting a voltage (V_2) corresponding to the voltage (V_1) and a means 4 for detecting a voltage (V_2) corresponding to the voltage (V_1) and a means 5 for detecting a voltage (V_2) corresponding to the voltage (V_2) By controlling the switching of switch 5, the ratio of voltage (V_1) to voltage (V_2) is made constant. and the switch 7 is kept in the OFF state during the period when the switch 5 is in the ON state. and means 3 for turning on switch 7 during the period when switch 5 is in the off state. do.

[0409] In the DC-DC converter shown in FIG. 46(A), during the period when the switch 5 is in the OFF state, The current (I_4) generated in the load 4 becomes 0. Then, the switch 5 changes from the OFF state to the ON state. The current (I_4) generated in load 4 increases over time after the transition to the This is due to the self-induction of inductor 6, and the load The average value of the current (I_4) generated in 4 will eventually converge to a constant value. In the DC-DC converter shown in Fig. 1, by controlling the switching of switch 5, The amount of current output can be controlled.

[0410] In the DC-DC converter shown in FIG. 46(A), the switching of the switch 5 by the means 3 is The voltage detected by the means 1 (V_1) and the voltage detected by the means 2 (V_2) are Here, the means 1 is controlled based on the input voltage (the voltage of the input node ) and means 2 detects a voltage proportional to the input current (current generated in the load 4). Therefore, means 3 detects the voltage (V_1) and the voltage (V_ 2), the switching of the switch 5 is controlled to keep the ratio of ) can be kept constant. .

[0411] In the DC-DC converter shown in FIG. 46(A), the switch 7 is Specifically, when the switch 5 is changed from the ON state to the OFF state, When the voltage changes to 0V, a current continues to flow in inductor 6 due to its self-induction. If the switch 7 is not provided, the switch 5 is turned on. When the state changes from the on state to the off state, the other end of the switch 5 and one end of the inductor 6 are electrically connected. There is a possibility that the potential of the node that is connected to the In this case, a high voltage is applied to the switch 5. As a result, the switch 5 is destroyed. On the other hand, in the DC-DC converter shown in FIG. By turning on the inductor 7, a path for the current generated in the inductor 6 can be secured. That is, it becomes possible to prevent the switch 5 from being destroyed.

[0412] <Specific example of method 1> As a first means, the circuit shown in FIG. 46(B) can be applied. The circuit shown includes a resistor 13 electrically connected to the high-potential input node at one end and a resistor The other end of the resistor 13 is electrically connected to the other end of the resistor 14, the other end of which is grounded. The potential of the node where the other end of the resistor 13 and one end of the resistor 14 are electrically connected is input to the means 3. That is, the circuit shown in FIG. 46(B) uses a resistor voltage divider to divide the input voltage (V_In). A circuit that detects a proportional voltage (V_1) and outputs the voltage (V_1) to means 3. be.

[0413] <Specific example of method 2> As a second means, the circuit shown in FIG. 46(C) can be applied. The circuit shown receives the voltage at one end of the load 4 as a non-inverting input signal and the The instrumentation amplifier 22 receives the voltage at the other end of the load 4. The instrumentation amplifier 22 has a non-inverting input. A voltage proportional to the difference between the voltage input to the output terminal and the voltage input to the inverting input terminal is generated. That is, the instrumentation amplifier 22 outputs a voltage to the load 4. The voltage applied across the load 4 is proportional to the load voltage. Since the current (I_4) across load 4 is proportional to the current (I It is also possible to express that the data (4) is output to the means 3. That is, FIG. 46(C) The circuit shown in Figure 1 generates a voltage ( This is a circuit that detects the voltage (V_2) and outputs the voltage (V_2) to the means 3.

[0414] <Specific example of method 3> As a third means, the circuit shown in FIG. 46(D) can be applied. The circuit shown receives the voltage (V_2) detected by the means 2 as a non-inverting input signal. , the voltage (V_1) detected by the means 1 is input as an inverted input signal to the error amplifier. A triangular wave oscillator 37 is connected to the inverter 36, and a voltage output from the triangular wave oscillator 37 is connected to the inverter 36 as a non-inverting input signal. (triangular wave) is input, and the voltage output by the error amplifier 36 is input as the inverted input signal. The voltage output by the comparator 38 is input to the comparator 38. The voltage output by the balancer controls the switching of switch 5 by outputting a voltage in phase with the voltage output by the balancer. The output of the comparator 38 is a voltage opposite in phase to the output of the buffer 39. The output of the comparator 38 is connected to an inverter 49 that controls the switching of the switch 7. The switching of the switch 5 is controlled directly by the voltage input (means shown in FIG. 46(D)). 3) the buffer 39 can be removed.

[0415] The error amplifier 36 detects the voltage input to the non-inverting input terminal and the voltage input to the inverting input terminal. That is, the error amplifier 36 amplifies the difference between the voltage (V_2) and the voltage ( V_1) is amplified and output.

[0416] The comparator 38 detects the voltage input to the non-inverting input terminal and the voltage input to the inverting input terminal. Specifically, the voltage output by the error amplifier 36 is When the voltage is lower than the triangular wave, a high-level voltage is output, and when the voltage is higher, a low-level voltage is output. That is, the lower the voltage output by the error amplifier 36, the higher the The duty ratio of the output signal of the comparator 38 becomes large. The amount of current output from the DC-DC converter is determined according to this ratio. If the duty ratio is large, the current output from the DC-DC converter (load 4 The current (I_4) generated in the error amplifier 36 also increases. The lower the voltage, the larger the current (I_4) generated in load 4.

[0417] Here, the voltage output by the error amplifier 36 is the input voltage (V_ In), and the current (I _4) ​​and the voltage (V_2) proportional to the input voltage (V_In). For example, If the input voltage ( When V_In becomes higher, the duty cycle at the output of comparator 38 becomes larger. Therefore, in the circuit shown in FIG. 46(D), when the input voltage (V_In) becomes high, Since the duty ratio of the output signal of the comparator 38 becomes large, the current generated in the load 4 In short, in the circuit shown in Figure 46(D), the input voltage ( V_In) to change the value of the current (I_4) generated in load 4. Therefore, in the circuit shown in FIG. 46(D), by adjusting the design conditions, Therefore, the voltage (V_1) proportional to the input voltage detected by means 1 and the voltage (V_2) proportional to the input voltage detected by means 2 are The ratio of the voltage (V_2) proportional to the current detected in the load 4 is kept constant. is possible.

[0418] The DC-DC converter shown in FIG. 47(A) is similar to the DC-DC converter shown in FIG. 46(A). The switch 7 in the inverter is replaced with a diode 8. The DC-DC converter has the same functions and effects as the DC-DC converter shown in FIG. It plays a key role.

[0419] In the DC-DC converter shown in FIG. 47(A), the first means is It is possible to apply the circuit shown in Fig. 46(C) as a means 2. As a third means, the circuit shown in FIG. 47(B) can be applied. In short, the circuit shown in FIG. 47(B) can be obtained by dividing the circuit shown in FIG. 46(D) The inverter 49 is omitted.

[0420] 47(C), the DC-DC converter shown in FIG. 46(A) is The diode 8 shown in (A) and the anode are connected to the other end of the switch 5, one end of the inductor 6, and the The cathode of the diode 8 is electrically connected to one end of the load 4. and a diode 9 electrically connected to one end of the switch 5. It is also possible to apply a converter. This enhances the effect of suppressing the destruction of the switch 5. This makes it possible to

[0421] Also, only the diode 8 or the diode A DC-DC converter with only 9 removed can also be applied to DC-DC converter 314. It is possible.

[0422] This embodiment mode can be combined with other embodiment modes as appropriate.

[0423] (Embodiment 6) In this embodiment, a light-emitting panel that can be used for a light-emitting device of one embodiment of the present invention will be described. 48 to 50 will be used for explanation. In this embodiment, an organic EL element is used as the light emitting element. In this embodiment, a case where a semiconductor device is used in a display device of one embodiment of the present invention will be described. A display panel that can display the image will be described with reference to FIGS. 51 and 52. The following mainly illustrates a case where a liquid crystal element is used as a display element.

[0424] <Light-emitting panel> An organic EL element is a device that contains a light-emitting organic compound between a pair of electrodes (a lower electrode and an upper electrode). A layer (also referred to as an EL layer) containing a light emitting element is provided between the lower electrode and the upper electrode. When a higher voltage is applied, holes are injected into the EL layer from the anode side and electrons are injected from the cathode side. The injected electrons and holes recombine in the EL layer, causing the luminescent material contained in the EL layer to emit light. It glows.

[0425] Organic EL elements are available in top-emission, bottom-emission, and dual-emission types. The electrode on the light extraction side uses a conductive film that transmits visible light. In addition, it is preferable to use a conductive film that reflects visible light for the electrode on the side from which light is not extracted. It's nice.

[0426] The layers that make up the EL layer are formed by deposition (including vacuum deposition), transfer, printing, and inkjet printing. The layer can be formed by a jet method, a coating method, or the like.

[0427] The EL layer has at least a light-emitting layer, which contains a light-emitting organic compound.

[0428] The EL layer is made of a material other than the light-emitting layer that has a high hole injection property, a material with a high hole transport property, and a hole Block materials, materials with high electron transport properties, materials with high electron injection properties, or bipolar materials The insulating film may further include a layer containing a substance (having high electron-transporting and hole-transporting properties) or the like.

[0429] <Light-emitting panel configuration example 1> Figure 48(A) shows a top view of the light-emitting panel. A cross-sectional view of the above is shown in FIG. 48(B). A cross-sectional view of the portion between the dashed line P2 and Q2 in FIG. 48(A) is shown in FIG. The cross section taken along the dashed line P3-Q3 in FIG. 48(A) is shown in FIG. 48(D). ) shown.

[0430] The light-emitting panel shown in FIGS. 48(A) to 48(D) includes a substrate 901, an insulating layer 903, an auxiliary electrode 921, and a (also called auxiliary wiring), a light-emitting element 930, an insulating layer 925, an adhesive layer 927, a conductive layer 911, It has a conductive layer 912 , a desiccant 913 , and a substrate 991 .

[0431] The light emitting element 930 is a bottom emission type organic EL element, and specifically, a lower electrode 931 that transmits visible light thereon, and an EL layer 933 on the lower electrode 931; An upper electrode 935 that reflects visible light is provided on the EL layer 933 .

[0432] In the light-emitting panel shown in FIGS. 48(A) to (D), a light-emitting element is formed on a substrate 901 via an insulating layer 903. An auxiliary electrode 921 provided on the insulating layer 903 is connected to the lower electrode 9 The conductive layer 911 provided on the insulating layer 903 is electrically connected to the lower electrode 931. As shown in FIGS. 48(A) and 48(C), a part of the conductive layer 911 is exposed. The conductive layer 912 provided on the insulating layer 903 is connected to the upper electrode 9 48(A) and (D), a part of the conductive layer 912 is exposed. The end of the lower electrode 931 is covered with an insulating layer 925. An insulating layer 925 is provided to cover the auxiliary electrode 921 via the lower electrode 931 .

[0433] The light emitting element 930 is sealed by the substrate 901 , the substrate 991 , and the adhesive layer 927 . The sealing method of the light-emitting panel is not limited, and may be, for example, solid sealing or hollow sealing. For example, the adhesive layer 927 may be made of a glass material such as glass frit, a two-component mixed resin, or the like. Use resin materials such as room temperature curing resin, photocuring resin, and thermosetting resin. The sealed space 929 is filled with an inert gas such as nitrogen or argon. The adhesive layer may be filled with a resin or the like that can be used for the adhesive layer. A desiccant may be included within.

[0434] A desiccant 913 is provided in contact with the substrate 991. The panel is a bottom-emitting type, so it can be installed in a space of 92 cm without reducing the light extraction efficiency. A desiccant 913 can be disposed in the light-emitting element 93. This is preferable as it can extend the life of 0.

[0435] <Light-emitting panel configuration example 2> Figures 49(A) to (D) show examples of passive matrix light-emitting panels. The RICKS light-emitting panel has multiple anodes arranged in parallel in stripes (bands) and A plurality of cathodes arranged in parallel in a band shape are provided so as to be perpendicular to each other, The EL layer is sandwiched between the crossings. The pixel at the intersection of the anode and the selected cathode will be illuminated.

[0436] 49(A) is a plan view of a light-emitting panel before an EL layer is formed. On the lower electrode 931, an opening corresponding to the light emitting region of the light emitting element is provided. On the insulating layer 925, a pair of electrodes 931 are provided. A plurality of inversely tapered partition walls 928 are provided parallel to the substrate.

[0437] FIG. 49(B) is a cross-sectional view taken along the dashed line AB in FIG. 49(A), and FIG. 49(C) is a cross-sectional view taken along the dashed line AB in FIG. 49(A) is a cross-sectional view taken along dashed line CD. In FIG. 49(B) and (C), the lower electrode 9 After forming an EL layer 933 and an upper electrode 935 on the substrate 31, a light emitting element 930 is fabricated. The configuration is shown.

[0438] In FIGS. 49B and 49C, an insulating layer 903 is provided on a substrate 901, and a An example is shown in which a plurality of striped lower electrodes 931 are arranged at equal intervals.

[0439] As shown in FIG. 49(C), the thickness of the insulating layer 925 and the partition wall 928 is set to be equal to that of the EL layer 933 and the upper By making the thickness of the EL layer 933 larger than that of the upper electrode 935, the EL layer 933 and the upper electrode 935 separated into a plurality of regions can be The upper electrode 935 is formed in a direction intersecting the lower electrode 931. The electrodes are stripes that are parallel to each other. The material constituting the EL layer 933 and the upper electrode 935 is also deposited on the partition wall 928. Layers made of materials are deposited, but these layers are separated from the EL layer 933 and the upper electrode 935. It has been done.

[0440] By painting the EL layer 933 (at least the light-emitting layer) differently, each light-emitting element exhibits a different color. This configuration allows a light-emitting panel capable of full-color display. The light emitted by the light-emitting element 930 is filtered by a color filter. By extracting the light through a filter, a light-emitting panel capable of full-color display may be formed.

[0441] Figure 49(D) shows the plane of a passive matrix light-emitting panel with an FPC mounted on it. In FIG. 49(D), a plurality of lower electrodes 931 and a plurality of upper electrodes 935 are mutually In FIG. 49(D), a part of the structure (EL layer 933 etc.) are omitted from the illustration.

[0442] The plurality of lower electrodes 931 are connected to the FPC 909a via an anisotropic conductive film (not shown). The upper electrodes 935 are electrically connected to the wiring 908 at the wiring end. 08 is connected to FPC 909b via an anisotropic conductive film (not shown).

[0443] In FIG. 49D, an example in which the driver circuit is not provided on the substrate 901 is shown. An IC chip having a driving circuit may be mounted.

[0444] <Light-emitting panel configuration example 3> When manufacturing a flexible light-emitting panel, a flexible substrate (also called a flexible substrate) As a method for forming a light emitting element on a flexible substrate, for example, a method for forming a light emitting element directly on the flexible substrate is used. The first method and the second method are different from the flexible substrate in that the light-emitting device is formed on a substrate with high heat resistance (hereinafter referred to as a fabrication substrate). After forming the optical element, the light emitting element is peeled off from the fabrication substrate and transferred to a flexible substrate. There is a second method, which is

[0445] For example, a glass substrate that is thin enough to be flexible is used in the manufacturing process of a light-emitting element. When a substrate having heat resistance to the temperature is used, the first method can be used to This is preferred because it is simpler.

[0446] In addition, by applying the second method, it is possible to form a low-permeability insulating film on the fabrication substrate by applying high temperature. Therefore, the insulating film or the like can be transferred to a flexible substrate. Even if a thin organic resin or the like is used as the material for the flexible substrate, a light-emitting panel that is flexible and highly reliable can be obtained. You can create a flannel.

[0447] An example of a light-emitting panel that can be manufactured by the second method is shown in Figure 50(A). The panel is a top-emission type light-emitting panel that uses a color filter system. The panel expresses one color using three sub-pixels, for example, R (red), G (green), and B (blue). Configuration: R, G, B, W (white) sub-pixels are used to express one color. A configuration in which one color is expressed by four sub-pixels of four colors, i.e., yellow (yellow), is applicable. There is no restriction on the color, and colors other than RGBWY may be used. For example, cyan or magenta may be used. Good too.

[0448] The light-emitting panel shown in FIG. 50(A) includes a substrate 901, an adhesive layer 902, an insulating layer 903, a transistor, and a 920, insulating layer 907, insulating layer 909, conductive layer 941, insulating layer 943, insulating layer 945 , light-emitting element 930, insulating layer 925, spacer 926, adhesive layer 927, colored layer 845R, 8 45G, 845B, 845Y, the light-shielding layer 847, the insulating layer 993, the adhesive layer 992, and the substrate 9 The substrate 901 and the substrate 991 are flexible substrates, and the light emitting element shown in FIG. The panel is flexible.

[0449] The light emitting element 930 includes a lower electrode 931, an optical adjustment layer 932, an EL layer 933, and an upper electrode 934. 35. The optical adjustment layer 932 is preferably made of a light-transmitting conductive material. Combination of color filter (colored layer) and microcavity structure (optical adjustment layer) This allows light with high color purity to be extracted from the light-emitting panel. is changed according to the luminescent color of each pixel.

[0450] The substrate 901 and the insulating layer 903 are bonded together by an adhesive layer 902. 93 is attached with an adhesive layer 992. On the insulating layer 903, a transistor 920 and a light emitting element An optical element 930 is formed on at least one of the insulating layer 903 and the insulating layer 993. If a highly moisture-proof film is used, impurities such as water may enter the light-emitting element 930 or the transistor 920. This is preferable because it can suppress the occurrence of light emitting defects and improve the reliability of the light emitting panel.

[0451] The source or drain of the transistor 920 is connected to the light-emitting element 930 through a conductive layer 941. The transistor 920 is electrically connected to the lower electrode 931. The second gate electrode 931 is formed on the flat surface. The edge of the lower electrode 931 is covered with an insulating layer 925. The bottom electrode 931 preferably reflects visible light. The top electrode 935 By providing a spacer 926, the distance between the substrate 901 and the substrate 991 can be adjusted. It is possible.

[0452] Each colored layer has a portion overlapping with the light emitting element 930. The light blocking layer 847 overlaps with the insulating layer 925. The gap between the light emitting element 930 and each colored layer is filled with an adhesive layer 927.

[0453] The insulating layers 907 and 909 have the effect of suppressing the diffusion of impurities into the semiconductor that constitutes the transistor. Furthermore, the insulating layers 943 and 945 reduce surface irregularities caused by transistors and wiring. It is preferable to select an insulating layer that has a planarizing function to reduce the thickness.

[0454] In one embodiment of the present invention, the light-emitting panel may have a touch sensor. 0(B), the insulating layer 993 and the light-shielding layer 847, and the insulating layer 993 and the colored layer A capacitor may be provided between the insulating layer 993 and the conductive layer 981. The plurality of conductive layers 981 are electrically connected by the conductive layer 983 through the openings in the insulating layer 982. An insulating layer 984 is provided to reduce surface irregularities caused by the capacitance element. A colored layer and a light-shielding layer 847 are provided in contact with the insulating layer 984. is formed using a material that transmits the light emitted by the light emitting element 930.

[0455] 50(C), the EL layer 933 may be colored differently. EL layers 933 that emit light of different colors may be provided.

[0456] The substrate of the light-emitting panel is made of materials such as glass, quartz, organic resin, metal, and alloy. The substrate on the side from which light from the light emitting element is extracted is made of a material that transmits the light. In particular, it is preferable to use a flexible substrate. For example, a substrate made of organic resin and having a thickness sufficient to provide flexibility is preferable. Various glasses, metals and alloys can be used.

[0457] The adhesive layer of the light-emitting panel may be a photo-curable adhesive such as an ultraviolet curable adhesive, a reaction-curable adhesive, Various curing adhesives such as thermosetting adhesives and anaerobic adhesives can be used. Adhesives include epoxy resin, acrylic resin, silicone resin, phenolic resin, and polyimide. resin, imide resin, PVC (polyvinyl chloride) resin, PVB (polyvinyl butyrate) resin, EVA (ethylene vinyl acetate) resin, etc. In particular, epoxy resin A material with low moisture permeability, such as grease, is preferable. Two-component resin may also be used. A sheet or the like may also be used.

[0458] The structure of the transistors included in the light-emitting panel is not particularly limited. The transistor may be a top gate type or an inverted staggered type. The transistor may have either a bottom gate or bottom gate structure. The conductive material is not particularly limited, and examples thereof include silicon such as amorphous silicon and polysilicon. , germanium, organic semiconductors, etc. Or, In-Ga-Zn based metal oxides, etc. Any oxide semiconductor containing at least one of indium, gallium, and zinc may be used. good.

[0459] The crystallinity of the semiconductor material used in the transistor is not particularly limited. A semiconductor having crystallinity (microcrystalline semiconductor, polycrystalline semiconductor, single crystal semiconductor, or a semiconductor having a partially crystalline region) When a semiconductor having crystallinity is used, the transistor This is preferable because it can suppress deterioration of the star characteristics.

[0460] <Display panel> In FIG. 51(A), a pixel portion 4002 is provided on a first substrate 4001. A sealing material 4005 is provided between the first substrate 4001 and the pixel portion 4002. The semiconductor device is sealed by a sealing material 4005 and a second substrate 4006. In an area on the substrate 4001 of the first embodiment, which is different from the area surrounded by the sealing material 4005, A signal line driver circuit 40 formed of a single crystal semiconductor or a polycrystalline semiconductor on a separately prepared substrate. 4003 and a scanning line driver circuit 4004 are mounted. Various signals and potentials given to the scanning line driver circuit 4004 or the pixel portion 4002 are input to the FPC 4 018a, FPC4018b.

[0461] In FIGS. 51B and 51C, a pixel portion 4002 is provided on a first substrate 4001, A sealing material 4005 is provided so as to surround the scanning line driver circuit 4004. The first substrate 4001 and the sealing material 4005 are connected to the scanning line driver circuit 4004. 51(B) and (C), the first In a region on the substrate 4001 different from the region surrounded by the sealant 4005, A signal line driver circuit 400 formed of a single crystal semiconductor or a polycrystalline semiconductor on a substrate prepared for the purpose. 51(B) and (C), a signal line driver circuit 4003, a scanning Various signals and potentials applied to the line driver circuit 4004 or the pixel portion 4002 are transmitted through the FPC 40 It is supplied by 18.

[0462] In addition, in FIGS. 51B and 51C, a signal line driver circuit 4003 is separately formed. Although an example in which the scanning line driving circuit is mounted on a substrate 4001 is shown, the present invention is not limited to this configuration. Alternatively, a circuit may be formed separately and mounted, or a circuit may be formed as part of a signal line driver circuit or a part of a scanning line driver circuit. Alternatively, the circuit board may be formed separately and mounted.

[0463] The method of connecting the separately formed drive circuit is not particularly limited, and may be a wire bond. COG, TCP, COF, etc. can be used. This is an example in which a signal line driver circuit 4003 and a scanning line driver circuit 4004 are mounted, and FIG. 51(B) shows an example in which a signal line driver circuit 4003 and a scanning line driver circuit 4004 are mounted. 51(B) is an example of mounting a signal line driver circuit 4003 by COG, and FIG. 51(C) is an example of mounting a signal line driver circuit 4003 by TCP. This is an example in which the signal line driver circuit 4003 is implemented by the above.

[0464] In addition, the pixel portion 4002 and the scanning line driver circuit 4004 provided on the first substrate 4001 are , and has a plurality of transistors.

[0465] FIG. 52 shows an example of a display panel having a liquid crystal element as a display element. An example of applying S (Fringe Field Switching) mode liquid crystal elements is shown below. The display panel shown in FIG. 52 has a scanning line driver circuit 4004 and a pixel portion 4002. Specifically, a substrate 701, a substrate 711, a transistor 820, a liquid crystal element 860, a polarizing plate 861, 862, backlight 863, insulating layers 815, 816, 817, conductive layer 857, The liquid crystal element 860 has an adhesive layer 927, a connector 826, an FPC 808, etc. The display device includes a first electrode 871, a liquid crystal 872, and a second electrode 873.

[0466] When liquid crystal elements are used as display elements, thermotropic liquid crystals, low molecular weight liquid crystals, polymer liquid crystals, etc. The liquid crystals that can be used include polymer dispersed liquid crystals, ferroelectric liquid crystals, and antiferroelectric liquid crystals. Depending on the conditions, the liquid crystal material can be in a cholesteric phase, a smectic phase, a cubic phase, or a chiral phase. The liquid crystals exhibit a blue phase without using an alignment film. That's fine.

[0467] In addition, a transistor using an oxide semiconductor can have relatively high field-effect mobility. Therefore, when an oxide semiconductor is used in a pixel portion of a semiconductor device having a display function, high-speed driving is possible. By using a transistor using the same, high quality images can be provided. Since it is possible to separately fabricate the driver circuit section and pixel section on one substrate, This allows for a reduction in the number of parts required for the device.

[0468] In addition to the FFS mode, the LCD panel also supports TN (Twisted Nematic) mode, IPS (In-Plane-Switching) mode, ASM (Axial ly Symmetric aligned Micro-cell) mode, OCB( Optical Compensated Birefringence (FL) mode C (Ferroelectric Liquid Crystal) mode, AFLC ( Antiferroelectric Liquid Crystal mode, etc. It is possible.

[0469] In addition, normally black type liquid crystal display panels, such as those using vertical alignment (VA) mode, Here, the vertical alignment mode is a mode in which the liquid crystal display panel is a transmissive type. It is a type of method for controlling the arrangement of liquid crystal molecules on the panel surface when no voltage is applied. In this method, the liquid crystal molecules are oriented perpendicular to the screen. For example, MVA (Multi-Domain Vertical Alignment) ment) mode, PVA (Patterned Vertical Alignment) t) mode, ASV (Advanced Super View) mode, etc. Also, a pixel can be divided into several regions (subpixels), and each Multi-domain or multi-domain design that allows molecules to bend in different directions A method called "

[0470] In addition, in the display panel, black matrix (light-shielding layer), polarizing member, phase difference member, reflector Optical members (optical substrates) such as anti-reflection members are provided as appropriate. For example, polarizing substrates and retardation substrates Alternatively, a backlight, a sidelight, or the like may be used as the light source. Good too.

[0471] In addition, the display method in the pixel section uses the progressive method, interlace method, etc. In addition, the color elements controlled by pixels when displaying colors are RGB (R is It is not limited to the three colors (red, green, and blue). For example, RGBW (W stands for white). , or RGB plus one or more colors such as yellow, cyan, magenta, etc. The size of the display area may be different for each dot of the color element. The method is not limited to color display panels, but is also applicable to monochrome display panels. It can also be used.

[0472] In this specification and the like, the display panel and the light-emitting panel may be in various forms or may be in various forms. An example of the display element is an EL element (an organic or inorganic material). LEDs (including EL elements, organic EL elements, inorganic EL elements), LEDs (white LEDs, red LEDs, green LEDs) LED, blue LED, etc.), liquid crystal elements, electrophoretic elements, MEMS (microelectromechanical systems) Examples include display elements using photonic crystals (electronic crystals, photonic crystals, and mechanical systems).

[0473] This embodiment mode can be combined with other embodiment modes as appropriate.

[0474] (Embodiment 7) In this embodiment, electronic devices of one embodiment of the present invention will be described with reference to FIGS. 53 to 55. .

[0475] A power storage device, a light-emitting device, a display device, or the like to which one embodiment of the present invention is applied can be used in electronic devices. A power storage device, a light-emitting device, a display device, or the like to which one embodiment of the present invention is applied can be used with a rubber bullet. The member having rubber elasticity has a plurality of protrusions. When using the device, two adjacent protrusions may come into contact with each other, causing the user to bend the device excessively. According to one aspect of the present invention, it is possible to prevent the electronic device from being bent too much. This can suppress damage caused by the electrical wiring, thereby improving the safety and reliability of electronic devices.

[0476] Examples of electronic devices include television sets (also known as televisions or television receivers). (c), computer monitors, digital cameras, digital video cameras, digital Photo frames, mobile phones (also called mobile phones or mobile phone devices), portable game consoles, mobile phones Examples include portable information terminals, audio playback devices, and large game machines such as pachinko machines.

[0477] The power storage device, the light-emitting device, the display device, or the like according to one embodiment of the present invention has flexibility. Do not install the device itself or any electronic equipment using the device on the inside or outside of a house or building. Along the curved interior or exterior surfaces of walls or moving objects (automobiles, airplanes, trains, ships, etc.) It can also be incorporated.

[0478] First, using Figures 53(A) to (E), a wrist-worn (or wristwatch-type) portable device according to one embodiment of the present invention will be described. A portable information terminal will be described. One aspect of the present invention is a portable information terminal that is worn on the wrist, upper arm, etc. The present invention is not limited to wearable types, but can also be applied to portable information terminals that are worn on the waist, ankles, etc.

[0479] The wrist-worn (or wristwatch) portable information terminal exemplified in this embodiment has a communication function, The portable information terminal may be capable of sending and receiving e-mails by itself. It can be used for various purposes such as browsing and creating documents, playing music, communicating over the Internet, and playing computer games. It is preferable to be able to run different applications.

[0480] Or, connect wirelessly or with a wired connection to a mobile phone such as a smartphone or other mobile information terminal. For example, you can use it together with a smartphone to send and receive emails. The display unit of the wrist-worn (or wristwatch-type) mobile information terminal is used as a sub-display. That's fine.

[0481] The portable information terminal may also be capable of performing short-distance wireless communication according to a communication standard. It may be possible to communicate hands-free by intercommunicating with a headset that is capable of communicating. .

[0482] A wrist-worn (or watch-type) mobile information terminal has a minimum number of buttons, switches, or touch panels. At least one button or switch is required for setting the time, turning the power on and off, and wireless communication. On / off operation of communication, activation and deactivation of silent mode, activation and deactivation of power saving mode, etc. It can have various functions. In addition, these operations can be controlled by operating the touch panel. The operating system built into the mobile information terminal may be able to The functions of the buttons and switches may be freely set.

[0483] The wrist-worn (or wristwatch) portable information terminal exemplified in this embodiment can measure heart rate, breathing rate, and other parameters. It is preferable to have a sensor that measures the user's biological information such as breath rate, pulse rate, body temperature, or blood pressure. It's nice.

[0484] For example, an optical sensor can be used to measure heart rate from the contraction of capillaries in the arm, etc. .

[0485] In addition, it is possible to determine whether a mobile information terminal is attached to the user's arm based on the electrical conductivity of the skin. By using a sensor, it is possible to automatically turn the power of a mobile information terminal on and off. That's fine.

[0486] These sensors are mounted on the side of a mobile information terminal that the user's arm touches. It is preferable that

[0487] It may also be possible to measure data on the usage environment. For example, an ultraviolet sensor or an illuminance sensor may be used. By knowing the amount of ultraviolet rays, it can be used to protect the user from sunburn. The brightness of the display can also be adjusted automatically depending on the illuminance of the environment. These sensors may be mounted on the display surface of a mobile information terminal, for example. It is preferable that:

[0488] In addition, mobile information terminals are equipped with GPS (Global Positioning System ) signal may be received.

[0489] It is also preferable that the portable information terminal can charge the secondary battery in a non-contact manner. It is preferable that the secondary battery can be charged using a photoelectric conversion element. For example, it would be preferable if the secondary battery could be charged by solar power generation.

[0490] The wrist-worn (or wristwatch) type mobile information terminal 300 shown in FIG. 53(A) includes a display unit 301, The display unit 301 includes a battery 303, a fastener 305, and a housing 307. The housing 303 and the housing 307 are both flexible. For example, the display unit 301 may be made of a flexible reflective material. A light panel or a display panel can be used. The battery 303 can also be flexible. According to one embodiment of the present invention, the display portion 301 and the battery This can prevent damage caused by excessive bending of the cable 303, thereby improving the reliability of the mobile information terminal 300. It can be increased.

[0491] In FIG. 53(A), an example in which two batteries 303 are provided in the housing 307 is shown. The number of batteries 301 is not particularly limited as long as it is one or more. 3 may be placed.

[0492] The housing 307 may be made of, for example, one or more of metal, resin, or natural material. As the metal, stainless steel, aluminum, titanium alloy, etc. can be used. In addition, acrylic resin, polyimide resin, etc. can be used as the resin. The natural materials that can be used include wood, stone, bone, leather, paper, and processed cloth.

[0493] FIG. 53(B) shows a perspective view of the portable information terminal 350 bent into a ring shape, and FIG. 53(C) shows a perspective view of the portable information terminal 350 bent into a ring shape. 53(C) shows a top view of the mobile information terminal 350 in an unfolded (or extended) state. ) are shown in Figures 53(D) and (E) as cross sections taken along the dashed line Z1-Z2.

[0494] The wrist-worn (or wristwatch) portable information terminal 350 comprises a display unit 301, a housing 302a, a The housing 302b and the battery 303 are both flexible. Therefore, it is easy to bend the portable information terminal 350 into a desired shape. Furthermore, the display unit 301 and the housing 302a may each be flexible. Depending on the embodiment, damage to the display unit 301 and the battery 303 due to excessive bending can be suppressed. This can improve the reliability of the portable information terminal 350. As shown, the mobile information terminal 350 may have an operation button 309.

[0495] As shown in FIG. 53D, the power storage device of one embodiment of the present invention is applied to the battery 303. The battery 303 is preferably made up of a secondary battery 20 and a member 40 having rubber elasticity. In addition, the light-emitting device of one embodiment of the present invention is preferably used in the display portion 301. The display unit 301 includes the light-emitting panel 10 and a member 40 having rubber elasticity.

[0496] As shown in FIG. 53(E), the mobile information terminal 350 may further include a sensor 70. As the sensor 70, various sensors such as the above-mentioned sensors for detecting biological information may be used. The sensor 70 may be flexible. The sensor 70 is made of a member 40 having rubber elasticity. In FIG. 53E, one embodiment of the present invention is applied to a battery 303. 1, an example in which the display unit 301, the housing 302a, and the sensor 70 are not flexible is shown.

[0497] 54(A) to 54(D) show an example of an electronic device having a curved display unit 7000. The display surface of the unit 7000 is curved, and the display can be performed along the curved display surface. The display unit 7000 may be flexible.

[0498] The electronic devices exemplified in this embodiment include a light-emitting device according to one embodiment of the present invention or a light-emitting device according to one embodiment of the present invention. For example, a light-emitting device having a light-emitting panel is used as the display unit 70. The light emitting device may further include a secondary battery. The power storage device having the unit may be provided as a battery.

[0499] An example of a mobile phone is shown in FIG. 54A. The mobile phone 7100 includes a display unit 7000, a housing 7101, operation button 7103, external connection port 7104, speaker 7105, microphone 7 It has 106 etc.

[0500] The mobile phone 7100 has a touch sensor on the display unit 7000. Any operation such as inputting characters is performed by touching the display unit 7000 with a finger or a stylus. This can be done by:

[0501] In addition, by operating the operation button 7103, the power can be turned on and off, and the display unit 7000 can be displayed. You can change the type of image displayed. For example, from the email creation screen, you can change the type of image displayed. You can switch to the new screen.

[0502] FIG. 54B shows an example of a television device. The television device 7200 includes a housing 72 The display unit 7000 is built into the housing 72. This shows a configuration that supports 01.

[0503] The television device 7200 can be operated using an operation switch provided on the housing 7201 or a separate remote control. This can be done by the computer operating device 7211. Alternatively, a touch sensor may be provided on the display unit 7000. The remote control may be provided, and the operation may be performed by touching the display unit 7000 with a finger or the like. The remote control device 7211 has a display unit that displays information output from the remote control device 7211. The channel may be controlled by the operation keys or touch panel of the remote control unit 7211. The panel and volume can be controlled, and the image displayed on the display unit 7000 can be controlled. can.

[0504] The television device 7200 is configured to include a receiver, a modem, etc. It is possible to receive more general television broadcasts. It is also possible to receive wired or wireless signals via a modem. By connecting to a communication network, it is possible to communicate in one direction (from sender to receiver) or two directions ( It is also possible to communicate information between a sender and a receiver, or between receivers.

[0505] The television device 7200 may be configured to provide, for example, full high-definition, 4K, or 8K image quality. It would be preferable to be able to display images such as:

[0506] FIG. 54(C) is a perspective view of the portable information terminal 7300, and FIG. 54(D) is a perspective view of the portable information terminal 7300. The portable information terminal 7300 includes a housing 7301 and a display portion 7000. In addition, the operation buttons, external connection ports, speaker, microphone, antenna, or battery The display unit 7000 may have a touch sensor. The operation can be performed by touching the display unit 7000 with a finger, a stylus, or the like.

[0507] The portable information terminal exemplified in this embodiment may be, for example, a telephone, a notebook, an information viewing device, or the like. It has one or more selected functions. Specifically, it can be used as a smartphone. The portable information terminal exemplified in this embodiment is, for example, a mobile phone, an electronic mail various functions such as browsing and creating documents, playing music, internet communication, and computer games The application can be executed.

[0508] The mobile information terminal 7300 can display text and image information on multiple surfaces. For example, as shown in FIG. 54(C), three operation buttons 7302 are displayed on one side and are shown as rectangles. In Fig. 54(C) and (D), the mobile information 7303 can be displayed on another surface. An example of information displayed at the top of the terminal is shown below.

[0509] Examples of such information include notifications from social networking services (SNS), Display notifying the arrival of an email or phone call, the subject of the email, or the sender's name , date and time, battery level, antenna reception strength, etc. Instead of information, operation buttons, icons, etc. may be displayed at the position where the information is displayed.

[0510] For example, the user of the mobile information terminal 7300 may carry the mobile information terminal 7300 in the breast pocket of his / her clothes. When it is stored, the display (information 7303 in this example) can be confirmed.

[0511] Specifically, the telephone number or name of the caller of the incoming call is displayed on the mobile information terminal 7300. The user takes the mobile information terminal 7300 out of his pocket and You can check the display and decide whether to answer the call without having to pick up the phone.

[0512] 54(E) to 54(H) show an example of a portable information terminal having a flexible display unit 7001. show.

[0513] The following portable information terminals each include a light-emitting device of one embodiment of the present invention or a power storage device of one embodiment of the present invention. For example, a light-emitting device having a light-emitting panel is used for the display portion 7001. The light emitting device may further include a secondary battery. Alternatively, the light emitting device may include a battery unit. For example, the portable information terminal may have a power storage device as a battery. Light-emitting panels that can be bent between 0.01mm and 150mm, and panels that can be bent between 1mm and 150mm A secondary battery or the like that can be bent to within mm or less can be applied. The mobile information terminal may be provided with a sensor, and the mobile information terminal may be operated by touching the display portion 7001 with a finger or the like. It is possible.

[0514] Figures 54(E) and (F) show an example of a foldable mobile information terminal. 54(F) shows the state where the display unit 7001 is folded inward. The mobile information terminal 7650 is folded so that the 001 is facing outward. The mobile information terminal 7650 has a display portion 7001 and a non-display portion 7651. When not in use, the display unit 7001 can be folded inward. It can prevent dirt and scratches.

[0515] An example of a flexible portable information terminal is shown in FIG. 54(G). The portable information terminal 7700 is The device has a housing 7701 and a display portion 7001. It also has a button 7703a as an input means, 7703b, speakers 7704a and 7704b as audio output means, and an external connection port 77 05, a microphone 7706, etc. The portable information terminal 7700 may be flexible. The battery 7709 may be mounted on the display unit 70. It may be placed on top of 01.

[0516] The housing 7701, the display portion 7001, and the battery 7709 are flexible. The portable information terminal 7700 can be bent into a desired shape or twisted. For example, the display portion 7001 of the portable information terminal 7700 can be mounted on the inside or outside. Alternatively, the mobile information terminal 7700 can be folded to the side. In this way, the housing 7701 and the display unit 700 can be used in a rolled-up state. Since the portable information terminal 7700 can be freely deformed, it can be easily carried out even if it is dropped or has the advantage that it is less likely to break even if an unintended external force is applied.

[0517] In addition, since the portable information terminal 7700 is lightweight, the upper part of the housing 7701 can be held with a clip or the like. Or, the housing 7701 can be fixed to the wall with a magnet or the like. It can be conveniently used in a variety of situations.

[0518] The light-emitting device of one embodiment of the present invention includes a light-emitting panel that functions as a display portion 7001 and a battery 7 and a secondary battery serving as the display portion 7001 and the display portion 7002. This prevents damage to the battery 7709 due to excessive bending, improving the reliability of the mobile information terminal. It can improve sexuality.

[0519] FIG. 54(H) shows an example of a wristwatch-type portable information terminal. The portable information terminal 7800 has a band. 7801, a display unit 7001, an input / output terminal 7802, an operation button 7803, etc. The housing 7801 functions as a housing. The battery 7805 can be mounted on the display unit 700. 7801 and / or the band 7802.

[0520] The band 7801, the display portion 7001, and the battery 7805 are flexible. The portable information terminal 7800 can be easily bent into a desired shape. This prevents the display unit 7001 and the battery 7805 from being damaged due to excessive bending. This makes it possible to improve the reliability of the portable information terminal.

[0521] By touching the icon 7804 displayed on the display unit 7001 with a finger or the like, the application can be launched.

[0522] The portable information terminal 7800 may have an input / output terminal 7802. If it has a connector, it can directly exchange data with other information terminals. Charging can also be performed via the input / output terminal 7802. The charging operation of the mobile information terminal shown can be performed by non-contact power transmission without using the input / output terminal. good.

[0523] The electronic devices illustrated in FIGS. 55A, 55D, 55F, and 55G include a light-emitting device according to one embodiment of the present invention. For example, a light-emitting panel A light-emitting device may be used for the display portion 7000. The light-emitting device may further include a secondary battery. Alternatively, a power storage device having a battery unit may be provided as a battery.

[0524] FIG. 55A shows an example of a mobile phone. The mobile phone 7400 has a housing 7401. In addition to the display unit 7402 incorporated in the The mobile phone 7400 is equipped with a speaker 7405, a microphone 7406, and the like. It has device 7407.

[0525] FIG. 55(B) shows the mobile phone 7400 in a bent state. When the entire device is deformed by an external force and curved, the power storage device installed inside The power storage device 7407 is a thin storage battery. The power storage device 7407 in a curved state is shown in FIG.

[0526] FIG. 55(D) shows an example of a bangle-type display device. The portable display device 710 is The device includes a body 715, a display unit 712, an operation button 713, and a power storage device 714. ) shows the state of the power storage device 714 bent.

[0527] Figure 55(F) shows an example of a wristwatch-type mobile information terminal. The mobile information terminal 720 has the following functions: Housing 721, display unit 722, band 723, buckle 724, operation button 725, input / output It is equipped with a terminal 726 and the like.

[0528] The display unit 722 has a curved display surface, and displays information along the curved display surface. The display unit 722 is also equipped with a touch sensor, and can be used to touch the screen with a finger or a stylus. For example, the icon 727 displayed on the display unit 722 can be operated by You can launch an application by touching it.

[0529] The portable information terminal 720 also has an input / output terminal 726, and can be connected to other information terminals via a connector. Data can be exchanged directly through the input / output terminal 726. The charging operation may be performed by wireless power supply without using the input / output terminal 726. stomach.

[0530] The portable information terminal 720 includes a power storage device. For example, the power storage device shown in FIG. 714 is placed in a curved state inside the housing 721 or in a curved state inside the band 723. It can be incorporated in this form.

[0531] FIG. 55(G) shows an example of a wristband-type display device. The display device 730 includes a display unit 73 The display device 730 has a touch sensor in the display unit 734. It can also function as a portable information terminal.

[0532] The display surface of the display unit 734 is curved, and the display can be performed along the curved display surface. In addition, the display device 730 can change the display status by short-distance wireless communication according to a communication standard. It can be changed.

[0533] The display device 730 also has an input / output terminal, and can directly exchange data with other information terminals via a connector. It is also possible to charge the device via the input / output terminals. The charging operation may be performed by wireless power supply without using the input / output terminals.

[0534] This embodiment mode can be combined with other embodiment modes as appropriate. [Explanation of symbols]

[0535] 1 means 2 means 3 means 4. Load 5 Switch 6 Inductors 7 Switch 8. Diodes 9. Diodes 10 Light-emitting panel 11 Light-emitting element 12a terminal 12b terminal 13 Resistance 14 Resistance 20 Secondary battery 21a electrode 21b Electrode 22 Instrumentation Amplifier 30 circuits 31 Antenna 32 Controller 33a terminal 33b terminal 34 terminals 35 Electronic Components 36 Error amplifier 37 Triangular Wave Oscillator 38 Comparator 39 buffers 40 Rubber elastic member 40a uneven structure 45 Touch Panel 49 Inverter 50 circuits 51 Switch 52a terminal 52b terminal 53a Wiring 53b Wiring 55 Circuit Board 60 areas 61 areas 62 areas 63 areas 64 areas 65 areas 66 areas 67 areas 68 Antenna 70 sensors 100 Electricity storage device 102 Active material layer 103 Separator 107 Exterior body 109 Rubber elastic members 109a Uneven structure 110 Electricity storage device 111 Positive electrode 112 Power storage device 113 Energy storage device 114 Electricity storage device 115 Negative electrode 116 Energy storage device 117 Energy storage device 118 Power storage device 119a Convex part 119b Convex part 120 Battery Unit 121 Positive lead 123 Electrode Lead 125 Negative lead 129 Sealing Layer 150 Light-emitting device 165 Spacer 165a spacer 165b spacer 165c spacer 165d spacer 191 Structure 192 recess 192a Uneven structure 195 Filling material 200 Secondary battery 203 Separator 203a area 203b area 207 Exterior body 211 Positive electrode 211a positive electrode 215 negative electrode 215a negative electrode 220 Sealing layer 221 Positive lead 225 Negative lead 230 Electrode assembly 231 Electrode assembly 250 Secondary battery 281 Tab Area 282 Tab Area 300 Mobile Information Terminals 301 Display section 302a housing 302b housing 303 Battery 305 Fasteners 307 Case 309 Operation Button 310 Power receiving device 311 Resonance coil 312 Coil 313 Rectifier circuit 314 DC-DC converter 315 Battery 316 Stray Capacitance 350 Mobile Information Terminals 400 Power Transmission Equipment 401 High frequency power supply 402 Coil 403 Resonance Coil 404 Stray Capacitance 500 battery unit 501 Positive electrode current collector 502 Positive electrode active material layer 503 Positive electrode 504 Negative electrode current collector 505 Negative electrode active material layer 506 negative electrode 507 Separator 508 Electrolyte 509 Exterior body 510 Positive lead 511 Negative lead 521 Structure 522 recess 522a Concave and convex structure 531 layers 551 Structure 552 recess 552a Concave and convex structure 701 PCB 710 Portable display devices 711 Circuit Board 712 Display section 713 Operation Button 714 Electricity storage device 715 Case 720 Mobile Information Terminals 721 Case 722 Display section 723 band 724 Buckle 725 operation button 726 Input / output terminal 727 Icon 730 Display device 734 Display section 808 FPC 815 Insulation layer 816 Insulating layer 817 Insulating layer 820 transistors 826 Connector 845B Colored layer 845G colored layer 845R colored layer 845Y colored layer 847 Light blocking layer 857 Conductive layer 860 Liquid crystal element 861 Polarizing Plate 862 Polarizing Plate 863 Backlight 871 Electrode 872 LCD 873 Electrode 901 Circuit Board 902 Adhesive layer 903 Insulation Layer 907 Insulation Layer 908 Wiring 909 Insulation Layer 909a FPC 909b FPC 911 Conductive Layer 912 Conductive layer 913 Desiccant 920 Transistor 921 Auxiliary electrode 925 Insulation layer 926 Spacer 927 Adhesive layer 928 Bulkhead 929 Space 930 Light-emitting element 931 Lower electrode 932 Optical adjustment layer 933 EL layer 935 Upper electrode 941 Conductive layer 943 Insulation Layer 945 Insulation Layer 981 Conductive layer 982 Insulation layer 983 Conductive layer 984 Insulation Layer 991 PCB 992 Adhesive layer 993 Insulation Layer 1000 Input power detection section 1001 means 1002 means 1003 Load 2000 Voltage conversion unit 2001 means 2002 Switch 4001 board 4002 Pixel section 4003 Signal line driver circuit 4004 Scanning line driver circuit 4005 Sealing material 4006 board 4018 FPC 4018a FPC 4018b FPC 7000 Display 7001 Display section 7100 Mobile Phone 7101 Housing 7103 Operation button 7104 External connection port 7105 Speaker 7106 Microphone 7200 Television Equipment 7201 Case 7203 Stand 7211 Remote control device 7300 Mobile Information Terminal 7301 Housing 7302 Operation button 7303 Information 7400 mobile phone 7401 Housing 7402 Display section 7403 Operation button 7404 External connection port 7405 Speaker 7406 Microphone 7407 Electricity storage devices 7650 Personal Digital Assistant 7651 Hidden part 7700 Personal Digital Assistant 7701 Housing 7703a Button 7703b Button 7704a Speaker 7704b Speaker 7705 External connection port 7706 Mike 7709 Battery 7800 Mobile Information Terminal 7801 band 7802 Input / output terminal 7803 Operation button 7804 Icons 7805 Battery

Claims

[Claim 1] An electricity storage device having a battery unit and a member having rubber elasticity, the battery unit includes a positive electrode, a negative electrode, an electrolyte, and an outer casing; the exterior body is provided so as to surround the positive electrode, the negative electrode, and the electrolyte, The member has a first protrusion and a second protrusion, the first protrusion and the second protrusion are provided on a first surface side of the battery unit, the first protrusion and the second protrusion can be brought into contact with each other by bending the power storage device so that the first surface of the battery unit faces inward, the second protrusion is provided in a rectangular shape at a center of the battery unit when viewed from above.

Images