Energy storage

Abstract

This enables the creation of flexible energy storage devices and the like. [Solution] The exterior body is given an uneven surface. For example, a part of the exterior body is given a wavy cross-sectional shape. The surface is given irregularities. These irregularities are not limited to shapes that include curves, but also include shapes that include straight lines, such as square waves and triangular waves. It may be in this form. By providing irregularities on the outer casing, the outer casing can be easily compressed on the inside of the bend, and the bend The outer casing can be made more flexible.

Description

Technical Field

[0001] One aspect of the present invention relates to an electricity storage body and a method for manufacturing the same.

[0002] Note that one aspect of the present invention is not limited to the above technical field. The technical field of one aspect of the invention disclosed in this specification and the like relates to an article, a method, or a manufacturing method. Or, one aspect of the present invention relates to a process, a machine, a manufacture, or a composition (composition of matter). Therefore, more specifically, examples of the technical field of one aspect of the present invention disclosed in this specification include semiconductor devices, display devices, light-emitting devices, power storage devices, storage devices, their driving methods, or their manufacturing methods. In particular, one aspect of the present invention relates to an electricity storage body and a method for manufacturing the same. Note that in this specification, the electricity storage body refers to all elements and devices having an electricity storage function. For example, examples of the electricity storage body include batteries, primary batteries, secondary batteries, lithium-ion secondary batteries, lithium-air secondary batteries, capacitors, lithium-ion capacitors, and the like. Also, in this specification, an electrochemical device refers to all devices that can function by using an electricity storage body, a conductive layer, a resistor, a capacitive element, and the like. Further, electronic devices, electrical devices, and mechanical devices may have an electricity storage body according to one embodiment of the present invention.

[0003]

[0004]

Background Art

[0004] In recent years, various electricity storage bodies such as secondary batteries such as lithium-ion secondary batteries, lithium-ion capacitors, and air batteries have been actively developed. In particular, lithium having high output and high energy density ​​​​​​​​​​​Muion rechargeable batteries are used in mobile phones, smartphones, notebook personal computers, etc. Electronic devices such as personal digital assistants, portable music players, digital cameras, or medical devices, etc. Hybrid vehicles (HEV), electric vehicles (EV), or plug-in hybrid vehicles (PHE) Next-generation clean energy vehicles such as V) are rapidly increasing in demand due to the development of the semiconductor industry. As it expands, it has become an indispensable source of rechargeable energy in today's information society. It is.

[0005] The characteristics required of lithium-ion batteries include higher energy density and improved cycle performance. This also includes improvements in safety and long-term reliability across various operating environments.

[0006] Furthermore, in recent years, flexible materials have been used for devices that are attached to the human body or curved surfaces, such as display devices worn on the head. A display device having this has been proposed. In addition, a flexible energy storage body that can be mounted on a curved surface is needed. It is being criticized.

[0007] Furthermore, an example of a lithium-ion battery includes at least a positive electrode, a negative electrode, and an electrolyte. (Patent Document 1) [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2012-9418 [Overview of the project] [Problems that the invention aims to solve]

[0009] One aspect of the present invention aims to realize a flexible energy storage device and the like. One of the challenges is to realize energy storage devices that can be easily bent and stretched. One of the challenges is to realize energy storage devices with superior performance. Alternatively, to create energy storage devices that are resistant to damage. One of the challenges is to provide such products, or to provide energy storage devices that are less prone to defects. One of the challenges is to provide reliable energy storage devices, etc. One of the challenges is to provide a novel energy storage device or the like.

[0010] Furthermore, the description of these problems does not preclude the existence of other problems. The approach does not need to solve all of these problems. This will become clear from the description in the specification, drawings, claims, etc., and the specification, drawings It is possible to extract other issues from the descriptions in the surfaces, claims, etc. [Means for solving the problem]

[0011] One aspect of the present invention provides a positive electrode and an outer casing having continuous irregularities on at least a portion of its surface. It has a negative electrode, a separator, and an electrolyte, and the cross-sectional shape of the casing is corrugated. It is a power storage device characterized by the following:

[0012] The cross-sectional shape of the irregularities on the exterior body includes curves and / or straight lines in at least a portion of it. It is possible.

[0013] As the outer casing of the energy storage body, an outer casing having continuous irregularities on at least a portion of its surface is used. This increases the flexibility of the exterior body. [Effects of the Invention]

[0014] This makes it possible to realize energy storage devices that are flexible. It is possible to create a highly flexible energy storage system. It is also possible to create a system that is resistant to damage. It is possible to realize energy storage devices, etc. It is possible to realize energy storage devices, etc. with good reliability. Alternatively, we can provide novel energy storage devices, etc.

[0015] Furthermore, the description of these effects does not preclude the existence of other effects. The embodiment does not necessarily have to have all of these effects. Furthermore, other effects are... This will become clear from the description in the specification, drawings, claims, etc., and the specification, drawings Furthermore, it is possible to extract other effects from the descriptions in the claims and other documents. [Brief explanation of the drawing]

[0016] [Figure 1] A diagram illustrating an example of an energy storage device. [Figure 2] A diagram illustrating the cross-sectional shape of the energy storage device. [Figure 3] A diagram illustrating an example of an energy storage device. [Figure 4] A diagram illustrating an example of a positive electrode. [Figure 5] A diagram illustrating an example of a positive electrode active material. [Figure 6] A diagram illustrating an example of how to connect a positive lead to a positive electrode. [Figure 7] A diagram illustrating an example of a negative electrode. [Figure 8] A diagram illustrating an example of a negative electrode active material. [Figure 9] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 10] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 11] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 12] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 13] A diagram illustrating an example of how to connect lead terminals to multiple positive or negative electrodes. [Figure 14] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 15] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 16] A diagram illustrating an example of the cross-sectional shape of an exterior body. [Figure 17] A diagram illustrating the cross-section of stacked energy storage devices. [Figure 18] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 19] A diagram illustrating an example of a method for manufacturing an energy storage device. [Figure 20] A diagram illustrating an example of the direction in which lead terminals are taken out. [Figure 21] A diagram illustrating an example of the direction in which lead terminals are taken out. [Figure 22] A diagram illustrating the radius of curvature of a surface. [Figure 23] A diagram illustrating the cross-section of an energy storage device. [Figure 24] A diagram illustrating an example of an electronic device. [Figure 25] A diagram illustrating an example of an electronic device. [Figure 26] A diagram illustrating an example of an electronic device. [Figure 27] A diagram illustrating a vehicle using one aspect of the present invention. [Modes for carrying out the invention]

[0017] The embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is... Not limited to the following description, the form and details can be modified in various ways, as any person skilled in the art would know. This is easily understood. Furthermore, the present invention shall be interpreted as being limited to the contents of the embodiments described below. It's not something that can be done.

[0018] In the figures described herein, the size, layer thickness, or area of ​​each component is as follows: Details may be exaggerated or omitted to clarify the meaning. Therefore, the scale may not necessarily reflect the actual situation. Not limited to [specific type / method].

[0019] Furthermore, in this specification, ordinal numbers such as "the first," "the second," etc., are used to avoid confusion of constituent elements. This is for visual inspection only and does not indicate any order or ranking, such as process order or layering order. Furthermore, even if an ordinal number is not attached to a term in this specification, the confusion of its constituent elements may occur. To avoid this, ordinal numbers may be used in the claims.

[0020] Furthermore, in this specification and elsewhere, "parallel" means, for example, two straight lines that are at an angle of -10° or more and 10° or less. This refers to a state where objects are positioned at the following angles. Therefore, it also includes cases where the angle is between -5° and 5°. Furthermore, "perpendicular" and "orthogonal" refer to, for example, two lines that are at an angle of 80° or more but less than or equal to 100°. This refers to a state where objects are arranged at an angle. Therefore, it includes cases where the angle is between 85° and 95°.

[0021] Furthermore, in this specification and other documents, the terms "identical," "same," and "equal" are used to refer to count values ​​and measured values. When using terms like "i" or "uniform," unless otherwise specified, it means plus or minus 20. Assumes a percentage error.

[0022] (Embodiment 1) An example of the configuration of a power storage device 100 according to one aspect of the present invention will be described with reference to the drawings. Figure 1(A) This is a perspective view showing the external appearance of the energy storage unit 100. Also, Figure 1(A) shows the X-axis direction, Y-axis direction, and An arrow indicating the Z-axis direction is shown. The X-axis, Y-axis, and Z-axis directions are respectively These are directions that are perpendicular to each other. Figure 1(B) is a top view of the energy storage body 100. Figure 2(A) is This is a cross-sectional view of the region indicated by the dashed line X1-X2 parallel to the X-axis direction in Figure 1(B). Furthermore, Figure 2(B) shows the area indicated by the dashed line Y1-Y2 parallel to the Y-axis direction in Figure 1(B). This is a cross-sectional view of the position. Also, Figure 2(C) shows the Y3-Y4 parallel to the Y-axis direction in Figure 1(B). This is a cross-sectional view of the area indicated by the dashed line.

[0023] In one aspect of the present invention, the energy storage body 100 includes a positive electrode current collector 101a and a positive electrode current collector inside the outer casing 107. A positive electrode 101 having a material layer 101b, a separator 103, a negative electrode current collector 102a and The negative electrode 102 has a negative electrode active material layer 102b and an electrolyte 106. To simplify the explanation, we will show an example where a pair of positive electrodes 101 and negative electrodes 102 are housed in an outer casing. However, in order to increase the capacity of the energy storage body, multiple sets of positive electrodes 101 and negative electrodes 102 are enclosed in an outer casing. It may be stored in the body. Also, the positive electrode 101 is electrically connected to the positive lead 104. The negative electrode 102 is electrically connected to the negative electrode lead 105. The positive electrode lead 104 and the negative electrode Lead 105 is also called a lead electrode or lead terminal. Positive lead 104 and A portion of the negative electrode lead 105 is positioned on the outside of the outer casing. Also, the charging of the energy storage unit 100 and Discharge occurs via the positive lead 104 and the negative lead 105.

[0024] Note that in Figure 2, a plate-shaped separator 103 is placed between the positive electrode 101 and the negative electrode 102. However, the present invention is not limited thereto. For example, a positive electrode 101 or a negative electrode 102 may be used. One of the parts may be covered by a bag-shaped separator 103.

[0025] In one embodiment of the present invention, the energy storage body 100 has an outer casing 107 with bellows-like irregularities. Figure 2(D) This is an enlarged cross-sectional view of the bent portion when the energy storage body 100 is bent in the Z-axis direction. The outer casing 107 By creating a structure with bellows-like irregularities (hereinafter also referred to as "bellows structure"), the inside of the bent part On the side, the outer casing 107 can be made to contract easily, and on the outside of the bent portion, the outer casing 107 can be made to stretch easily. By making the outer casing 107 a bellows structure, a highly flexible energy storage body 100 can be realized. It is possible.

[0026] Figures 1 and 2 show the exterior body 107 having continuous irregularities in the X1-X2 direction. However, the present invention is not limited to this. For example, having irregularities that are continuous only in the Y1-Y2 direction It is also acceptable to have continuous bumps and grooves in both the X1-X2 direction and the Y1-Y2 direction. That's fine.

[0027] Furthermore, if the bending position of the energy storage body 100 is fixed, only a portion of the outer casing 107 can be constructed using a bellows structure. It may also be constructed as follows. As an example, Figure 3 shows a power storage body 1 having a bellows structure in part of the outer casing 107. Fifty external perspective views are shown.

[0028] An energy storage body according to one aspect of the present invention has a radius of curvature of 30 mm or less when bent, preferably a radius of curvature of 1 It can be reduced to 0 mm or less. The outer casing of the energy storage unit is composed of one or two films. The curved cross-sectional structure of the energy storage body has the positive electrode 101 and the negative electrode 102 as outer casings. The structure is sandwiched between two curves of film.

[0029] Here, the radius of curvature of a surface will be explained using Figure 22. In Figure 22(A), In the plane 1701 obtained by cutting the curved surface 1700, the curve 1702 included in the curved surface 1700 A portion is approximated as an arc of a circle, and the radius of that circle is set to the radius of curvature of 1703, and the center of the circle is set to the center of curvature 1 Let's assume it's 704. Figure 22(B) shows a top view of the curved surface 1700. Figure 22(C) shows the plane 17 The cross-sectional view of the curved surface 1700 cut by 01 is shown. When a curved surface is cut by a plane, relative to the curved surface The radius of curvature of the curve that appears in the cross-section will differ depending on the angle of the plane and the position of the cut. In this specification, the smallest radius of curvature is defined as the radius of curvature of the surface.

[0030] A battery storage body, consisting of two films as an outer casing, sandwiches battery materials such as electrodes and electrolyte (1805) between them, and is curved. If this is done, the radius of curvature 18 of the film 1801 on the side closer to the center of curvature 1800 of the energy storage body will be 02 is smaller than the radius of curvature 1804 of film 1803 on the side farther from the center of curvature 1800. (Figure 23(A)). If the energy storage body is curved to make the cross-section arc-shaped, the center of curvature approaches 1800. Compressive stress is applied to the surface of the film, and the surface of the film far from the center of curvature 1800 Tensile stress is applied (Figure 23(B)). By giving the exterior body an uneven shape, this Even if compressive or tensile stress is applied, the effects of strain are kept within acceptable limits. Therefore, in one aspect of the present invention, the refractory of the outer casing on the side closer to the center of curvature of the energy storage body is possible. The radius of curvature during bending can be set to 30 mm or less, preferably 10 mm or less.

[0031] Furthermore, the cross-sectional shape of the energy storage body is not limited to a simple arc shape, but can be made to have a shape in which a part of it is an arc. It is possible to create shapes such as the one shown in Figure 23(C), a wavy shape (Figure 23(D)), an S-shape, and so on. It is also possible. If the curved surface of the energy storage body has a shape with multiple centers of curvature, then multiple curves In the surface with the smallest radius of curvature among the radii of curvature at each of the center of curvature, the two outer The radius of curvature of the outer casing closest to the center of curvature of the mounting is set to 30 mm or less, preferably 10 mm or less. It is possible.

[0032] <Configuration and manufacturing method of each part> Next, the configuration and manufacturing method of each part of the energy storage unit 100 will be described.

[0033] [1. Positive electrode] Figure 4 shows an example of the positive electrode 101. Figure 4(A) is a front view of the positive electrode 101, and Figure 4(B) and Figure 4(C) is a cross-sectional view of the area indicated by the dashed line A1-A2 in Figure 4(A). Electrode 101 consists of a positive electrode current collector 101a and a positive electrode active material layer 1 formed on the positive electrode current collector 101a. It is composed of 01b, etc. Figure 4(B) shows one side of the sheet-like positive electrode current collector 101a. This shows an example in which a positive electrode active material layer 101b is provided.

[0034] Figure 4(C) shows an example in which a positive electrode active material layer 101b is provided on both sides of a sheet-shaped positive electrode current collector 101a. This shows that by providing the positive electrode active material layer 101b on both sides of the positive electrode current collector 101a, energy storage is achieved. The charge and discharge capacity of the body 100 can be increased. Also, one side of the positive electrode current collector 101a Two positive electrodes 101 are prepared, each having a positive electrode active material layer 101b, and the positive electrode 101 is... The materials may also be used stacked so that the sides without the highly active material layer 101b are facing each other.

[0035] Furthermore, the positive electrode active material layer 101b may be provided over the entire area on the positive electrode current collector 101a, but the positive electrode current collector It may also be provided on a part of the current collector 101a. For example, the positive lead 104 of the positive electrode current collector 101a The portion in contact with the positive electrode (hereinafter also referred to as the "positive electrode tab") does not have a positive electrode active material layer 101b. It would be good to structure it that way.

[0036] The positive electrode current collector 101a is made of stainless steel, gold, platinum, zinc, iron, copper, aluminum, and titanium. Metals such as these, and their alloys, which have high conductivity and are compatible with carrier ions such as lithium ions. Materials that do not undergo alloying can be used. Also, silicon, titanium, neodymium, Scandinavian Aluminum alloys to which elements that improve heat resistance, such as um and molybdenum, are added are used. It can also be formed with a metallic element that reacts with silicon to form a silicide. Examples of metallic elements that react with silicon to form silicides include zirconium and titanium. Hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, corn Examples include balt, nickel, etc. The positive electrode current collector 101a can be foil-shaped, plate-shaped (sheet-shaped), mesh-shaped, and Shapes such as chrysanthemum metal or expanded metal can be used as appropriate. Positive electrode current collection Body 101a should preferably have a thickness of 5 μm or more and 30 μm or less. Also, positive electrode current collector An undercoat layer may be provided on the surface of 101a using graphite or the like.

[0037] The positive electrode active material layer 101b contains not only the positive electrode active material but also a binder to improve the adhesion of the positive electrode active material. The binder may also contain conductive additives to enhance the conductivity of the positive electrode active material layer 101b.

[0038] Figure 5 shows the surface of the positive electrode active material layer 101b using a scanning electron microscope (SEM). An example of a photograph taken with an ectron microscope is shown. The positive electrode active material is shown in Figure 5. The solid layer 101b consists of granular positive electrode active material 6003, conductive additive 6004, and binder 6005 This includes.

[0039] The positive electrode active material 6003 is a calcined product obtained by mixing raw material compounds in a predetermined ratio and calcining it, and then using appropriate means. Granular particles consisting of secondary particles with average particle size and particle size distribution, which are crushed, granulated, and classified by the above method. This is the electrode active material. Therefore, the shape of the positive electrode active material is limited to the shape exemplified in Figure 5. There is none. The positive electrode active material 6003 can take the form of, for example, granular, plate-shaped, rod-shaped, cylindrical, or powder. It can be made into any shape, such as a scale-like shape. It can also have a plate-like surface with an uneven surface, Objects with three-dimensional shapes, such as those with fine irregularities on the surface or those with a porous structure. That's fine.

[0040] Furthermore, the positive electrode active material 6003 has an olivine-type crystal structure, a layered rock salt-type crystal structure, and Examples include composite oxides having a spinel-type crystal structure. For example, as the positive electrode active material 6003, For example, LiFeO2, LiCoO2, LiNiO2, LiMn2O4, V2O5, Cr2 Compounds such as O5 and MnO2 are used.

[0041] In particular, LiCoO2 has a large capacity and is more stable in the atmosphere than LiNiO2. Therefore, it is preferable because it has advantages such as being thermally stable compared to LiNiO2.

[0042] Furthermore, lithium-containing materials having a spinel-type crystal structure containing manganese, such as LiMn2O4. Ingredients include a small amount of lithium nickelate (LiNiO2 or LiNi 1-x MO2(M=Co, A) Mixing (1, etc.) offers advantages such as suppressing manganese elution and inhibiting the decomposition of the electrolyte. It is preferable.

[0043] Alternatively, composite materials (general formula LiMPO4(M is Fe(II), Mn(II), Co(I)) I), one or more Ni(II) can be used. A representative example of the general formula LiMPO4 is For example, LiFePO4, LiNiPO4, LiCoPO4, LiMnPO4, LiFe a Ni b PO4, LiFe a Co b PO4, LiFea Mn b PO4, LiNi a Co b PO4, LiNi a Mn b PO4 (a + b is less than or equal to 1, 0 < a < 1, 0 < b < 1), LiF e c Ni d Co e PO4, LiFe c Ni d Mn e PO4, LiNi c Co d Mn e PO 4 (c + d + e is less than or equal to 1, 0 < c < 1, 0 < d < 1, 0 < e < 1), LiFe f Ni g C o h Mn i PO4 (f + g + h + i is less than or equal to 1, 0 < f < 1, 0 < g < 1, 0 < h < 1, 0 <i < 1) and other lithium compounds can be used as materials.

[0044] In particular, LiFePO4 preferably satisfies the requirements for a cathode active material, such as safety, stability, high capacity density, high potential, and the presence of lithium ions that can be extracted during initial oxidation (charging), in a balanced manner. Therefore, it is preferable.

[0045] Or, a composite material such as the general formula Li (2-j) MSiO4 (M is one or more of Fe(II), Mn(II), Co( II), Ni(II), 0 ≤ j ≤ 2) can be used. General formula Li (2-j) MSiO4 representative examples include Li (2-j) FeSiO4, Li​​​​​​​​​​​​​​l SiO4, Li (2-j) Fe k Co l SiO4, Li (2-j ) Fe k Mn l SiO4, Li (2-j) Ni k Co l SiO4, Li (2-j) Ni k Mn l SiO4 (k + l is 1 or less, 0 < k < 1, 0 < l < 1), Li (2-j) Fe m N i n Co q SiO4, Li (2-j) Fe m Ni n Mn q SiO4, Li (2-j) Ni m Co n Mn q SiO4 (m + n + q is 一 or less, 0 < m < 1, 0 < n < 1, 0 < q < 1) , Li (2-j) Fe r Ni s Co t Mn u SiO4 (r + s + t + u is 1 or less, 0 < r < 1, 0 < s < 1, 0 < t < 1, 0 < u < 1) and other lithium compounds can be used as materials and so on.

[0046] In addition, as the positive electrode active material 6003, 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 can be used. As the NASICON-type compound, there are Fe2(M nO4)3, Fe2(SO4)3, Li3Fe2(PO4)3, etc. Also, the positive electrode active As quality 6003, Li2MPO4F, Li2MP2O7, Li5MO4 (M=Fe, M Compounds represented by the general formula n), perovskite-type fluorides such as NaFeF3 and FeF3 Metal chalcogenides (sulfides, selenides, tellurides) such as TiS2 and MoS2, L Oxides with an inverse spinel crystal structure such as iMVO4, vanadium oxide systems (V2O5) V6O 13 Materials such as LiV3O8, manganese oxides, and organic sulfur compounds are used. It is possible.

[0047] Furthermore, the carrier ions may include alkali metal ions other than lithium ions, or alkaline earth metal ions. In the case of group ions, instead of lithium, alkali metals (e.g., sodium) can be used as the positive electrode active material. (e.g., lium and potassium), alkaline earth metals (e.g., calcium, strontium, burr) You may also use (such as um, beryllium, magnesium, etc.). For example, NaFeO2 or Na2 / 3 [Fe 1 / 2 Mn 1 / 2 ] Sodium-containing layered oxides such as O2 are used as the positive electrode active material 600 It can be used as 3.

[0048] Furthermore, a material obtained by combining multiple of the above materials may be used as the positive electrode active material 6003. Example For example, a solid solution formed by combining multiple of the above materials can be used as the positive electrode active material 6003. For example, LiCo 1 / 3 Mn 1 / 3 Ni 1 / 3 A solid solution of O2 and Li2MnO3 is used as the positive electrode. It can be used as active material 6003.

[0049] The average particle size of the primary particles of the granular positive electrode active material 6003 is between 50 nm and 100 μm. It is recommended to use this.

[0050] Conductive additive 6004 includes acetylene black (AB), graphite particles, Carbon nanotubes, graphene, fullerenes, and other materials can be used.

[0051] The conductive additive 6004 forms an electron conduction network in the positive electrode active material layer 101b. This is possible. The conductive additive 6004 maintains the electrical conduction path between the positive electrode active materials. This can be achieved. By adding the conductive additive 6004 to the positive electrode active material layer 101b, high conductivity can be achieved. A positive electrode active material layer 101b with low conductivity can be realized.

[0052] In addition, as binder 6005, in addition to the typical polyvinylidene fluoride (PVDF), Imide, polytetrafluoroethylene, polyvinyl chloride, ethylene propylene Polymer, styrene-butadiene rubber, acrylonitrile-butadiene rubber, fluorine Polyvinyl acetate, polymethyl methacrylate, polyethylene, nitrocellulose, etc. It can be used.

[0053] The content of binder 6005 relative to the total amount of positive electrode active material layer 101b is 1 wt% or more and 10 wt% or more. Preferably t% or less, more preferably 2wt% to 8wt%, and 3wt% to 5wt%. The following is even more preferable. Furthermore, the content of the conductive additive relative to the total amount of the positive electrode active material layer 101b is Preferably, the amount is 1 wt% to 10 wt%, and more preferably 1 wt% to 5 wt%.

[0054] When forming the positive electrode active material layer 101b using a coating method, the positive electrode active material 6003 and a conductive additive are used. Mix 6004 and binder 6005 to prepare a positive electrode paste (slurry), and then use a positive electrode current collector. Simply apply it to 101a and let it dry.

[0055] [1.1. Connect the lead electrodes to the positive terminal] After forming a positive electrode active material layer 101b on the positive electrode current collector 101a, the positive electrode of the positive electrode current collector 101a A positive lead 104 having a sealing layer 115 is connected to the tab (see Figure 6(A)). The positive electrode tab and positive electrode lead 104 are electrically connected by applying ultrasonic waves while applying pressure. Ultrasonic welding.

[0056] Furthermore, the positive electrode tab to which the positive electrode lead 104 is connected is subjected to external force after the energy storage body has been manufactured. The resulting stress can easily lead to defects such as crack formation and breakage.

[0057] Therefore, in this embodiment, an ultrasonic welding apparatus having the bonding die shown in Figure 6(B) is used. Use the following. Note that in Figure 6(B), for simplification, the upper and lower Bonder components of the ultrasonic welding apparatus are shown. Only the wing die is shown in the illustration.

[0058] A first bonding die 201 having a projection 203, and a second bonding die 202 Place the positive electrode tab and positive electrode lead 104 in between. The area to be connected will overlap with the protrusion 203. When ultrasonic welding is performed in this manner, a connection area 210 and a curved portion 220 are formed in the positive electrode tab. This is possible. Figure 6(C) shows an enlarged perspective view of the connection area 210 and curved portion 220 of the positive electrode tab. show.

[0059] By providing this curved section 220, external force is applied to the energy storage body 100 after it has been manufactured. The resulting stress can be alleviated. Therefore, the reliability of the energy storage body 100 can be improved. ru.

[0060] Furthermore, the ultrasonic welding apparatus having the bonding die shown in Figure 6(B) is capable of ultrasonic welding and bending. Since the formation of part 220 can be performed simultaneously, secondary batteries can be manufactured without increasing the number of processes. While this is possible, ultrasonic welding and the formation of the curved portion 220 may be performed separately.

[0061] Furthermore, the process is not limited to forming a curved portion 220 on the positive electrode tab, but also includes using stainless steel as the material for the positive electrode current collector. By using materials with high strength, such as resin, and by making the film thickness of the positive electrode current collector 10 μm or less, a secondary battery can be created. The structure may also be designed to facilitate the relaxation of stresses caused by external forces applied after the product has been manufactured.

[0062] Of course, it goes without saying that combining multiple of these can also be used to alleviate stress concentration in the positive electrode tab. do not have.

[0063] In this way, a positive electrode 101 with a positive electrode lead 104 connected can be fabricated (Figure 6(D)).

[0064] [2. Negative electrode] Next, an example of a negative electrode constituting the energy storage device will be explained using Figure 7. Figure 7 shows negative electrode 102 This is an example. Figure 7(A) is a front view of the negative electrode 102, and Figures 7(B) and 7(C) are shown. This is a cross-sectional view of the area indicated by the dashed line A3-A4 in Figure 7(A). The negative electrode 102 is the negative electrode The current collector 102a and the negative electrode active material layer 102b formed on the negative electrode current collector 102a, etc. It is constructed as follows. Figure 7(B) shows a negative electrode active material layer 1 on one side of a sheet-like negative electrode current collector 102a. This shows an example of providing 02b. Figure 7(C) shows an example in which a negative electrode active material layer 102b is provided on both sides of a sheet-shaped negative electrode current collector 102a. This shows that by providing the negative electrode active material layer 102b on both sides of the negative electrode current collector 102a, energy storage is achieved. The charge and discharge capacity of the unit 100 can be increased. Also, one side of the negative electrode current collector 102a Two negative electrodes 102 are prepared, each having a negative electrode active material layer 102b, and the negative electrode 102 is... The materials may also be used stacked so that the sides without the highly active material layer 102b are facing each other.

[0065] Furthermore, the negative electrode active material layer 102b may be provided over the entire area on the negative electrode current collector 102a, but the negative electrode It may also be provided on a part of the current collector 102a. For example, the negative electrode lead 105 of the negative electrode current collector 102a The portion in contact with (hereinafter also referred to as the "negative electrode tab") does not have a negative electrode active material layer 102b. It would be good to structure it that way.

[0066] The negative electrode current collector 102a is made of metals such as stainless steel, gold, platinum, zinc, iron, copper, and titanium, and These alloys and other materials have high conductivity and do not alloy with carrier ions such as lithium ions. Materials can be used. Also, metal elements that react with silicon to form silicides can be used. It may be done. As a metallic element that reacts with silicon to form a silicide, zirconium Titanium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten Materials include stainless steel, cobalt, and nickel. The negative electrode current collector 102a is available in foil or plate (sheet) form. Shapes such as mesh, perforated metal, and expanded metal can be used as appropriate. The negative electrode current collector 102a should preferably have a thickness of 5 μm or more and 30 μm or less. An undercoat layer may be provided on the surface of the negative electrode current collector 102a using graphite or the like. stomach.

[0067] Figure 8 shows an example of a scanning electron microscope image of the surface of the negative electrode active material layer 102b. Figure 8 The negative electrode active material layer 102b contains the negative electrode active material 6103 and the binder 6105 (binding agent). Although an example is shown, a conductive additive may be added to the negative electrode active material layer 102b.

[0068] The negative electrode active material layer 102b allows for the dissolution and deposition of lithium, or the insertion and removal of lithium ions. The material is not particularly limited as long as it is capable. The material for the negative electrode active material layer 102b is lithium. In addition to metals and lithium titanate, carbon-based materials and alloy materials, which are common in the energy storage field, are also examples. It can be done.

[0069] Lithium metal has a low oxidation-reduction potential (-3.045V compared to a standard hydrogen electrode), and its weight and They have a high specific capacity per unit volume (3860mAh / g and 2062mAh / cm³, respectively). 3 Therefore, it is preferable.

[0070] Carbon-based materials include graphite, easily graphitizable carbon (soft carbon), and poorly graphitizable carbon (hard carbon). Examples include carbon dioxide, carbon nanotubes, graphene, and carbon black.

[0071] Graphite includes mesocarbon microbeads (MCMB), coke-based artificial graphite, and pitch. Examples include artificial graphite such as synthetic graphite and natural graphite such as spheroidized natural graphite.

[0072] Graphite is formed when lithium ions are inserted between the layers (during the formation of lithium-graphite intercalation compounds). (i) exhibits a potential as low as lithium metal (0.1 to 0.3V vs. Li / Li + ). This allows lithium-ion batteries to exhibit a high operating voltage. Furthermore, black Lead has a relatively high capacity per unit volume, low volume expansion, and is inexpensive. Lithium gold It is preferable because it has advantages such as higher safety compared to other species.

[0073] As a negative electrode active material, it is possible to perform charge and discharge reactions through alloying and dealloying reactions with lithium. Possible alloy materials or oxides can also be used. In some cases, alloying materials include, for example, Mg, Ca, Al, Si, Ge, Sn, Pb, It contains at least one of the following: As, Sb, Bi, Ag, Au, Zn, Cd, Hg, and In. Examples of such materials include those with a large capacity relative to carbon, and silicon in particular is theoretically large. The capacity is dramatically high at 4200mAh / g. Therefore, silicon is used as the negative electrode active material. This is preferable. Examples of alloy materials using such elements include Mg2Si, Mg 2Ge, Mg2Sn, SnS2, V2Sn3, FeSn2, CoSn2, Ni3Sn2, Cu6Sn5, Ag3Sn, Ag3Sb, Ni2MnSb, CeSb3, LaSn3, L Examples include a3Co2Sn7, CoSb3, InSb, and SbSn.

[0074] Furthermore, the negative electrode active material layer 102b can be SiO, SnO, SnO2, or titanium oxide (TiO2). ), lithium titanium oxide (Li4Ti5O 12 ), lithium-graphite intercalation compound (Li x C6), niobium oxide (Nb2O5), tungsten oxide (WO2), molybdenum oxide (M Oxides such as oO2 can be used.

[0075] Furthermore, the negative electrode active material layer 102b is a Li3N type, which is a lithium and transition metal complex nitride. Li with structure 3-x M x N(M=Co, Ni, Cu) can be used. For example, Li 2.6 Co 0.4 The N3 has a large charge / discharge capacity (900mAh / g, 1890mAh / c). m3 ) indicates a preference.

[0076] When a lithium-transition metal binitride is used, lithium ions are included in the negative electrode active material, Combined with lithium-ion-free materials such as V2O5 and Cr3O8 as positive electrode active materials. This is preferable. By pre-desorbing the lithium ions contained in the positive electrode active material, the negative electrode active material A lithium-transition metal composite can be used as the composite material.

[0077] Furthermore, the material that causes the conversion reaction can also be used as the negative electrode active material layer 102b. For example, cobalt oxide (CoO), nickel oxide (NiO), iron oxide (FeO), etc. Alternatively, a transition metal oxide that does not undergo an alloying reaction with lithium may be used as the negative electrode active material. Materials that can undergo the fusion reaction include Fe2O3, CuO, Cu2O, and RuO2. , oxides such as Cr2O3, CoS 0.89 , sulfides such as NiS and CuS, Zn3N2, C Nitrides such as u3N and Ge3N4, phosphides such as NiP2, FeP2, and CoP3, FeF3 This can also occur with fluorides such as BiF3.

[0078] When forming the negative electrode active material layer 102b on the negative electrode current collector 102a using a coating method, A negative electrode paste (slurry) is prepared by mixing substance 6103 and binder 6105, and the negative electrode assembly is assembled. It is sufficient to apply it to the electrode body 102a and let it dry. Furthermore, a conductive additive is added to the negative electrode paste. That's good too.

[0079] Furthermore, graphene may be formed on the surface of the negative electrode active material layer 102b. For example, negative electrode active material When the material layer 102b is silicon, the absorption and release of carrier ions during the charge-discharge cycle. Due to the large volume change associated with discharge, the negative electrode current collector 102a and the negative electrode active material layer 102b do not adhere closely together. The performance deteriorates, and the battery characteristics degrade due to charging and discharging. Therefore, the negative electrode active material containing silicon When graphene is formed on the surface of the silicon layer 102b, the silicon body Even if the product changes, the adhesion between the negative electrode current collector 102a and the negative electrode active material layer 102b does not decrease. This is preferable because it can suppress degradation and reduce the deterioration of battery characteristics.

[0080] Furthermore, a film such as an oxide may be formed on the surface of the negative electrode active material layer 102b. The film formed by the decomposition of the electrolyte releases the amount of charge consumed during its formation. This cannot be done, and irreversible capacitance is formed. In contrast, a coating of oxides, etc. is applied to the negative electrode active material in advance. By providing it on the surface of the mass layer 102b, the generation of irreversible capacity can be suppressed or prevented. Cut.

[0081] The coating covering the negative electrode active material layer 102b includes niobium, titanium, vanadium, and Tal, tungsten, zirconium, molybdenum, hafnium, chromium, aluminum Alternatively, an oxide film of any one of silicon, or one of these elements and lithium. An oxide film can be used. Such a film is negatively affected by the decomposition products of conventional electrolytes. It is a sufficiently dense film compared to the film formed on the very surface.

[0082] For example, niobium oxide (Nb2O5) has an electrical conductivity of 10 -9 Low S / cm and high insulation It exhibits this property. Therefore, the niobium oxide film inhibits the electrochemical decomposition reaction between the negative electrode active material and the electrolyte. It is harmful. On the other hand, the lithium diffusion coefficient of niobium oxide is 10 -9 cm 2 / sec, high It has lithium ion conductivity. Therefore, it is possible to pass lithium ions through it. Alternatively, silicon oxide or aluminum oxide may be used.

[0083] For example, the sol-gel method can be used to form the coating that covers the negative electrode active material layer 102b. The sol-gel method involves hydrolysis of a solution consisting of metal alkoxides, metal salts, etc. This method involves forming a gel that has lost its fluidity through a polycondensation reaction, and then firing this gel to form a thin film. The sol-gel method is a method for forming a thin film from a liquid phase, so the raw materials must be homogeneous at the molecular level. It can be mixed. For this reason, the raw material for the metal oxide film at the solvent stage can be negative electrode active material such as graphite. By adding a certain quality, the active material can be easily dispersed in the gel. In this way, A coating can be formed on the surface of the negative electrode active material layer 102b. By using this coating, This prevents a decrease in the capacity of the energy storage device.

[0084] [2.1. Connect the lead electrode to the negative terminal] After forming a negative electrode active material layer 102b on the negative electrode current collector 102a, the negative electrode of the negative electrode current collector 102a A negative electrode lead 105 having a sealing layer 115 is connected to the tab. The connection of 5 can be made in the same way as the connection of the positive tab and positive lead 104.

[0085] [3. Separator] Cellulose and polypropylene (PP) are used as materials to form separator 103. Polyethylene (PE), polybutene, nylon, polyester, polysulfone, polya Using porous insulators such as crironitrile, polyvinylidene fluoride, and tetrafluoroethylene. It can be used in nonwoven fabrics such as glass fibers, or composites of glass fibers and polymer fibers. A diaphragm may be used.

[0086] The positive electrode 101, the negative electrode 102, and the separator 103 are separated by the positive electrode 101 and the negative electrode 102. The Parator 103 is placed on top of the other. At this time, the positive electrode active material layer 101b and the negative electrode active material layer 10 2b are placed on top of each other so that they face each other. Figure 9(A) shows the positive electrode active material on one side of the positive electrode current collector 101a. A positive electrode 101 has a solid layer 101b formed on it, and a negative electrode active material layer 1 is formed on one side of the negative electrode current collector 102a. This shows how the plate-shaped separator 103 is sandwiched between the negative electrode 102 on which 02b is formed. The positive lead 104 and the negative lead 105 are positioned in different directions so that they do not overlap. They are doing it.

[0087] Furthermore, the separator 103 consists of at least the positive electrode active material layer 101b and the negative electrode active material layer 102b. It is preferable that it be large enough to completely cover one of them.

[0088] Figure 9(B) shows the positive electrode 101, negative electrode 102, and separator 103 stacked together. This is a perspective view. Also, Figure 9(C) shows the part indicated by the dashed line B1-B2 in Figure 9(B). This is a cross-sectional view. Here, we show an example where a negative electrode 102, which is larger than the positive electrode 101, is superimposed. However, a negative electrode 102 smaller than the positive electrode 101 may be stacked. Alternatively, a positive electrode 10 of the same size may be used. You may also stack electrode 1 and negative electrode 102.

[0089] The shape of the separator 103 does not have to be plate-shaped. For example, a separator 1 folded in half Using 03, one or both of the positive electrode 101 and the negative electrode 102 are folded in half to form a separator. It may also be placed inside 103. Figure 10(A) shows the inside of the folded separator 103. The diagram shows the positive electrode 101 being placed on the side, and then the negative electrode 102 being placed on top of it.

[0090] Figure 10(B) shows the positive electrode 101 and negative electrode placed inside the folded separator 103. This is a perspective view showing the superimposed state of 102. Also, Figure 10(C) is in Figure 10(B) This is a cross-sectional view of the area indicated by the dashed line B3-B4. Here, the positive electrode 101 is of the same size. The example shows the positive electrode 101 and the negative electrode 102 stacked on top of each other, but the sizes of the positive electrode 101 and the negative electrode 102 are different. It is fine. The folded separator 103 is either the positive electrode 101 or the negative electrode 102. It can be used for one or both purposes.

[0091] Furthermore, using a bag-shaped separator 103, one or both of the positive electrode 101 and the negative electrode 102 are separated. It may also be placed inside the bag-shaped separator 103. Figure 11 shows the bag-shaped separator 103. The diagram shows the positive electrode 101 being placed on the inside, and then the negative electrode 102 being placed on top of it. Letter 103 may be in the form of an envelope.

[0092] Foldable, bag-shaped, and envelope-shaped separators allow for a number of electrodes used in the energy storage body, with 101 positive electrodes. When the combined value of the negative electrode 102 is 3 or more, the productivity of the energy storage system can be increased.

[0093] Furthermore, if the number of electrodes used in the energy storage body is three or more, a wavy (zigzag) bent separator is used. Using separators is particularly effective. Figure 12(A) shows a separator 103 bent into a wavy shape. This is a perspective view showing how the positive electrode 101 and the negative electrode 102 are alternately superimposed via the same element. Figure 12(A) shows a positive electrode 101 and a negative electrode 102 with an active material layer formed on one side of the current collector. Between them are a positive electrode 101 and a negative electrode 102, each having an active material layer on both sides of the current collector. It indicates a child.

[0094] Figure 12(B) shows the positive electrode 101 and the negative electrode 102 separated by a wavy-bent separator 103. This is a perspective view showing multiple superimposed figures. Also, Figure 12(C) is shown in Figure 12(B) This is a cross-sectional view of the area indicated by the dashed line between B5 and B6.

[0095] The wavy-bent separator has a number of electrodes used in the energy storage device, with 101 positive electrodes and 102 negative electrodes. When the total is three or more, the productivity of the energy storage system can be further increased.

[0096] When multiple separators 103 are used in the energy storage body 100, all separators 103 must be made of the same material. Alternatively, one can be used, or a combination of separators 103 made of different materials may be used. When multiple separators 103 are used in the energy storage body 100, all separators 103 must be of the same shape. Alternatively, one type may be used, or a combination of separators 103 of different shapes may be used.

[0097] Furthermore, when manufacturing an energy storage device having multiple positive electrodes 101 and multiple negative electrodes 102, the positive electrode 10 1. After stacking the separator 103 and the negative electrode 102, combine the multiple positive electrode tabs into one. It is preferable to connect to the positive lead 104 (see Figure 13(A)). Also, the negative tab It is preferable to connect the positive tab and positive lead 105 together. The connection of 04 and the connection of the negative electrode tab and negative electrode lead 105 are as described above, bonding die This can be done using an ultrasonic welding apparatus having [a specific feature]. Figure 13(B) shows the connection of the negative electrode tab. An enlarged perspective view of region 210 and curved portion 220 is shown. Multiple positive electrode tabs are grouped together into one positive electrode. By connecting to electrode lead 104, and by bundling multiple negative electrode tabs into one negative electrode lead By connecting to the D105, the productivity of the energy storage system can be increased.

[0098] [4. Exterior] There are various structures for secondary batteries, but in this embodiment, the formation of the outer casing 107 A film is used. The film used to form the outer casing 107 is a metal film (A Plastic films made of aluminum, stainless steel, nickel steel, etc., and organic materials. Thermoplastic films, organic materials (organic resins and fibers, etc.), and inorganic materials (ceramics, etc.) Hybrid material films including carbon-containing films (carbon films, graphite) Using a single-layer film selected from (such as film) or a laminated film consisting of multiple such films The metal film is easy to process to create an uneven surface, and the bellows-structured exterior body 107 is fabricated. It is easy to do. Also, the metal film has excellent heat dissipation properties. Furthermore, the outer casing 107 has a recess Alternatively, forming a protrusion increases the surface area of ​​the outer casing 107 that is exposed to the outside air, thereby improving the heat dissipation effect. It is possible to do so.

[0099] Furthermore, if an external force is applied to change the shape of the energy storage body 100, a part of the outer casing 107 Deformation or partial destruction may occur. (Formation of recesses or protrusions on the exterior body 107) This reduces the strain caused by the stress applied to the exterior body 107, thereby increasing its bending strength. This makes it possible to further reduce damage to the outer casing even after repeated bending and straightening. Therefore, the reliability of the energy storage unit 100 can be improved. Note that strain is the reference (initial) of an object. (Periodic state) A measure of deformation that shows the displacement of a material point within an object relative to its length. The outer casing 107 is concave. By forming a part or protrusion, the strain caused by applying force from outside the energy storage body casts shadows. Resonance can be kept within an acceptable range. Therefore, a highly reliable energy storage device can be provided. Cut.

[0100] Figure 14(A) is a perspective view showing the external appearance of the cylindrical outer casing 107 having a bellows structure. 4(B) shows the cylindrical outer casing 107 in a state where it has been deformed in the diametrical direction (as if to flatten a circle). This is a perspective view. The cylindrical outer body 107, which has a bellows structure, is deformed, and the air enters through the inlet 119. The electrode 101, separator 103, and negative electrode 102 are placed inside the outer casing 107 (Figure 14(C)). ).

[0101] Next, one of the two inlet openings 119 of the outer casing 107 is joined by heat sealing. The sealing layer 115 provided on the lead electrode also melts, fixing the lead electrode and the outer casing 107 together. It is possible.

[0102] [5. Electrolyte] Next, under a reduced pressure atmosphere or an inert gas atmosphere, the desired amount of electrolyte is poured into the other inlet 11 Insert from 9 into the inside of the outer casing 107.

[0103] As the solvent for the electrolyte 106 used in the energy storage body 100, an aprotic organic solvent is preferred. For example, ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate - Carbonate, chloroethylene carbonate, vinylene carbonate, γ-butyrolactone γ-Valerolactone, Dimethyl carbonate (DMC), Diethyl carbonate (DE C), ethyl methyl carbonate (EMC), methyl formate, methyl acetate, methyl butyrate, 1 ,3-dioxane, 1,4-dioxane, dimethoxyethane (DME), dimethyl sulfone Hoxide, diethyl ether, methyl diglyme, acetonitrile, benzonitrile, tetra One of the following: lahydrofuran, sulfolane, sultone, or two or more of these. It can be used in combinations and ratios.

[0104] Furthermore, by using a polymer material that gels as the solvent for the electrolyte, the risk of leakage is reduced. The integrity is improved. Furthermore, it enables the miniaturization and weight reduction of secondary batteries. (Gelated polymer material) Typical examples of materials include silicone gel, acrylic gel, acrylonitrile gel, and polyethylene gel. Examples include polypropylene oxide, polypropylene oxide, and fluorinated polymers.

[0105] Furthermore, one ionic liquid (a room-temperature molten salt) that is flame-retardant and non-volatile is used as the solvent for the electrolyte. Alternatively, by using multiple units, even if the internal temperature rises due to an internal short circuit or overcharging of the energy storage unit, This can prevent the battery storage system from rupturing or catching fire.

[0106] Furthermore, when lithium ions are used as the carrier electrolyte to be dissolved in the above solvent... For example, 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 ), one or more lithium salts such as LiN(C2F5SO2)2 It can be used in any combination and ratio.

[0107] In addition, the electrolytic solution used for the power storage body is preferably a highly purified electrolytic solution with a low content of granular dust and elements other than the constituent elements of the electrolytic solution (hereinafter, also simply referred to as "impurities"). Specifically, it is preferable that the weight ratio of impurities to the electrolytic solution is 1% or less, preferably 0.1% or less, and more preferably 0.01% or less. Additives such as vinylene carbonate may also be added to the electrolytic solution.

[0108] And finally, the other inlet 119 is joined by thermocompression bonding. In this way, the power storage body 100 can be manufactured. By using the cylindrical exterior body 107, the joining process of the outer periphery of the exterior body 107 can be reduced, and the productivity of the power storage body 100 can be enhanced. By making the exterior body 107 into a bellows structure, the flexibility of the power storage body 100 can be improved, making it less likely to be damaged, and a highly reliable power storage body can be realized.

[0109]

[0110] This embodiment can be implemented in appropriate combination with other embodiments. <000s898>

[0110] (Embodiment 2) In this embodiment, a power storage body having a configuration different from that of Embodiment 1 will be described with reference to FIG. 15. Note that the power storage body shown in this embodiment can be manufactured using the same ​​​​​​​​​​​​The formation methods of the body 100 and the outer casing 107 are different. The energy storage body 150A consists of two plate-shaped outer casings. The positive electrode 101, separator 103, and negative electrode 102 are arranged between the 107 to form the structure.

[0112] A positive electrode 101, a separator 103, and a negative electrode 102 are arranged between two plate-shaped outer casings 107. Next, the outer periphery of the outer casing 107, excluding the inlet 119 for introducing the electrolyte 106, is heated and pressure-treated. The joints are attached by adhesive (see Figure 15(C)). Note that the inlet 119 is located at any position on the outer periphery. It is acceptable to include it. During heat sealing, the sealing layer 115 provided on the lead electrode also melts and the lead The electrode and the outer casing 107 can be fixed in place. See Figures 15(A) and 15(C). The portion where the outer periphery of the outer body 107 is joined by heat compression is shown as the joint portion 118.

[0113] Then, under a reduced pressure atmosphere or an inert gas atmosphere, a desired amount of electrolyte 106 is inlet 1 Insert 19 into the inside of the outer casing 107. Finally, seal the inlet 119 by heat sealing. Combine them. In this way, a 150A energy storage unit can be manufactured (see Figure 15(A)). ).

[0114] Furthermore, by providing irregularities on the outer casing 107, the flexibility of the energy storage unit 150A is improved, making it less susceptible to damage. This enables the realization of a highly reliable energy storage device. Cross-sectional shape of the outer casing 107 having irregularities. An example is shown in Figures 16(A) to 16(H). Figures 16(A) to 16(H) are from Figure 15 (B) This is a cross-sectional view of the area indicated by the dashed line C1-C2 or D1-D2. C2 shows the cross-section of the exterior body 107 in the lateral direction, and D1-D2 show the cross-section of the exterior body 107 in the vertical direction.

[0115] Figures 16(A) to 16(C) show an example of a wavy cross-sectional shape with continuous curved irregularities. Figure 16(A) shows that there are irregularities in areas other than the joint 118 at the end of the outer casing 107. Although this feature is provided, as shown in Figure 16(B), the surface may also be made uneven up to the end of the outer casing 107. Furthermore, if the position where the energy storage body bends is clear, as shown in Figure 16(C), the outer casing 10 A part of 7 may have irregularities or bumps.

[0116] Furthermore, the pitch P of the irregularities is preferably one-tenth or less of the length L in the vertical cross-section. It is more preferable that it be 1 / 20 or less, and even more preferable that it be 1 / 50 or less. Also, the pitch of the irregularities. P is preferably 1 / 10 or less of the length W in the lateral cross-section, and preferably 1 / 20 or less. Preferably, it is 1 / 50 or less, and even more preferably 1 / 50 or less.

[0117] Here, length L is the longitudinal straight-line distance of the region enclosed by the joint 118. Or, length L is the longitudinal straight-line distance of the region where the positive electrode 101 and the negative electrode 102 are provided. The length W is the lateral straight-line distance of the region enclosed by the joint 118. Alternatively, the length W is This is the lateral linear distance of the region where the positive electrode 101 and the negative electrode 102 are provided (Figure 15( See A). ).

[0118] Furthermore, the height difference A of the uneven surface is preferably 5 times or more the thickness T of the exterior body, and more preferably 10 times or more. Furthermore, a ratio of 20 times or more is even more preferable (see Figure 16(A)).

[0119] Furthermore, the pitch P and height difference A do not necessarily have to be uniform over the entire length L or length W. That's fine. For example, the pitch P and / or height difference A may be varied depending on the part of the exterior body. In other words, the pitch P and / or height difference A may have multiple values. Or, The pitch P and / or the height difference A may be continuously changed in the vertical direction and / or the horizontal direction. Yes.

[0120] When the power storage body of one aspect of the present invention is bent, the pitch P inside the bent portion may be smaller than the pitch P outside the bent portion. Also, the pitch P outside the bent portion may be larger than the pitch P inside the bent portion. Yes. Yes.

[0121] The cross-sectional shape of the concavo-convex provided on the exterior body 107 is not limited to a shape including a curve, and may be a shape including a straight line as shown in FIGS. 16(D) to 16(F). For example, it may be a rectangular wave shape or a triangular wave shape. Also, as shown in FIG. 16(G), a shape combining a curve and a straight line may be used. Yes. Yes. Also, when no continuous concavo-convex is provided in at least one of the horizontal direction or the vertical direction of the exterior body 107, the cross-sectional shape in the direction where no continuous concavo-convex is provided is as shown in FIG. 16(H). The cross-sections illustrated in FIGS. 16(A) to 16(H) can be used in appropriate combinations. Yes. Yes.

[0122] FIG. 17 is a cross-sectional view of a state where two power storage bodies 150A having continuously concavo-convex in a triangular wave shape of the exterior body are stacked. As shown in FIG. 17, when a plurality of power storage bodies are stacked and used, by adjusting the concavo-convex shape and the pitch P of each exterior body, the power storage bodies can be meshed with each other. By meshing the concavo-convex of the exterior bodies, displacement of the plurality of power storage bodies can be prevented. Yes. Yes. Yes. Yes.

[0123] In FIG. 17, the power storage body 150A is illustrated as the power storage body with meshed exterior bodies, but the same effect can be achieved with a power storage body such as the power storage body 100. Yes.

[0124] Figure 18(A) is a front view of the energy storage unit 150B. Also, Figure 18(B) is a front view of the energy storage unit 150 This is a diagram illustrating an example of the manufacturing method for B. The energy storage unit 150B is made up of energy storage unit 100 and energy storage unit The method of forming the outer casing 107 differs between 150A and the battery storage unit 150B. The positive electrode 101, separator 103, and negative electrode 102 are arranged between the bodies 107 to form the device.

[0125] The positive electrode 101, separator 103, and negative electrode 102 are placed between the two folded outer casings 107. After that, the outer periphery of the outer casing 107, excluding the inlet 119 for introducing the electrolyte 106, is heat-sealed. The joint is formed by this (see Figure 18(C)).

[0126] Then, under a reduced pressure atmosphere or an inert gas atmosphere, a desired amount of electrolyte 106 is inlet 1 Insert 19 into the inside of the outer casing 107. Finally, seal the inlet 119 by heat sealing. Combine them. In this way, the energy storage body 150B can be manufactured (see Figure 18(A)). ).

[0127] Furthermore, since the energy storage unit 150B is manufactured using the outer casing 107 which is folded in half, The length of the joint 118 can be made shorter than that of 150A. Therefore, the manufacturing time of the energy storage body is reduced. This can shorten the time required. According to one aspect of the present invention, the productivity of the energy storage system can be increased. ru.

[0128] Furthermore, similar to the 150A energy storage unit, the cross-sectional shape shown in Figures 16(A) to 16(H) is folded in half. It can be used in the exterior body 107.

[0129] Figure 19(A) is a front view of the energy storage unit 150C. Also, Figure 19(B) is a front view of the energy storage unit 150 This is a diagram illustrating an example of how to manufacture C. Energy storage body 150C is manufactured in the same way as energy storage body 100. A cylindrical outer casing 107 having two openings is used.

[0130] After arranging the positive electrode 101, separator 103, and negative electrode 102 inside the cylindrical outer casing 107, One of the openings leaves an inlet 119 for introducing the electrolyte 106, and the cylindrical outer body The openings in section 107 are joined by heat sealing (see Figure 19(C)).

[0131] Then, under a reduced pressure atmosphere or an inert gas atmosphere, a desired amount of electrolyte 106 is inlet 1 Insert 19 into the inside of the outer casing 107. Finally, seal the inlet 119 by heat sealing. Combine them. In this way, the energy storage body 150C can be manufactured (see Figure 19(A)). ).

[0132] Since the energy storage body 150C is manufactured using a cylindrical outer casing 107, the energy storage body 150A and The length of the joint 118 can be made shorter than that of the energy storage body 150B. Therefore, the construction of the energy storage body Manufacturing time can be shortened. According to one aspect of the present invention, the productivity of energy storage bodies can be increased. It is possible.

[0133] Furthermore, similar to the 150A energy storage unit, the cross-sectional shape shown in Figures 16(A) to 16(H) is cylindrical. It can be used in the exterior body 107.

[0134] (Embodiment 3) In this embodiment, an example of the lead terminal extraction direction and the external shape of the energy storage body is shown in Figure 20. This will be explained using Figures A) through 20(D) and Figures 21(A) through 21(D).

[0135] Figure 20(A) is a front view of the energy storage unit 200A. The energy storage unit 200A has a positive electrode lead 104 and The negative electrode lead 105 is positioned on the same side as the outer casing 107.

[0136] Figure 20(B) is a front view of the energy storage unit 200B. The energy storage unit 200B has a positive lead 104 and The negative electrode lead 105 is positioned on 107 different sides of the outer casing.

[0137] Furthermore, in one aspect of the present invention, the energy storage body has a positive electrode lead 104 and a negative electrode lead 105 respectively It may have one or more of these. For example, as shown in Figure 20(C), The one positive lead 104 and the two negative leads 105 may be placed on different sides. Furthermore, the two positive leads 104 and the one negative lead 105 are arranged on different sides. That's fine.

[0138] For example, as shown in Figure 20(D), the energy storage unit 200D has one positive lead 104 and two The negative electrode leads 105 may be placed on the same side. Alternatively, two positive electrode leads 104 and one negative lead may be placed on the same side. You can also place the 105 pole lead on the same side.

[0139] For example, as shown in Figure 21(A), the energy storage device 200E has positive electrode leads 10 on four different sides. 4 and the negative lead 105 may be placed together.

[0140] For example, as shown in Figure 21(B), the energy storage unit 200F has multiple positive electrode leads 104 and multiple A negative electrode lead 105 may be provided.

[0141] Furthermore, the external shape of the energy storage body according to one aspect of the present invention is not limited to a rectangle. For example, Figure 21( The energy storage body 200G shown in C) may have a curved portion. Also, for example, Figure 2 As shown in 1(D) the energy storage unit 200H, it has a shape that is partially missing from the ones listed above. It's okay to be there.

[0142] An energy storage device according to one aspect of the present invention allows the number of lead terminals used and their extraction positions to be set at any desired location. It can be determined. According to one aspect of the present invention, to provide a power storage body with a high degree of design freedom. It is possible.

[0143] (Embodiment 4) A power storage device according to one aspect of the present invention is used in power storage devices for various electronic devices that are driven by electricity. This is possible. Figures 24 to 27 show an electronic device using an energy storage device according to one aspect of the present invention. Let me give you a specific example.

[0144] Electronic devices using an energy storage device according to one aspect of the present invention include display devices such as televisions and monitors, Lighting fixtures, desktop or notebook personal computers, word processors It is stored on recording media such as DVDs (Digital Versatile Discs). Image playback devices that play still images or videos, portable CD players, radios, tape recorders Coda, headphone stereo, stereo, desk clock, wall clock, cordless phone handset, Transceivers, mobile phones, car phones, portable game consoles, tablet devices, pachinko machines Large game consoles, calculators, personal digital assistants, electronic organizers, e-books, electronic translators, voice input devices, etc. High-frequency heating in equipment such as video cameras, digital still cameras, electric shavers, and microwave ovens. Devices, electric rice cookers, electric washing machines, electric vacuum cleaners, water heaters, electric fans, hair dryers, air conditioners Air conditioning equipment such as air conditioners, humidifiers, and dehumidifiers, dishwashers, dish dryers, clothes dryers, and fabrics. Danry dryer, electric refrigerator, electric freezer, electric refrigerator-freezer, DNA storage freezer, flashlight, Examples include tools such as chainsaws, smoke detectors, and medical equipment such as dialysis machines. Leading lights, traffic lights, conveyor belts, elevators, escalators, industrial robots, power storage Examples include industrial equipment such as systems, power leveling devices, and energy storage devices for smart grids. Furthermore, mobile devices propelled by electric motors using electricity from energy storage devices also fall under the category of electronic equipment. It shall be included in the category. As the above-mentioned mobile devices, for example, electric vehicles (EVs), internal combustion engines and Hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs) that also incorporate electric motors. , tracked vehicles that replace these tire wheels with tracks, and motorized vehicles including electric assist bicycles Bicycles, motorcycles, electric wheelchairs, golf carts, small or large vessels, submarines, helicopters Examples include drones, aircraft, rockets, satellites, space probes and planetary probes, and spacecraft. ru.

[0145] Furthermore, an energy storage device according to one aspect of the present invention can be used in the interior or exterior walls of houses and buildings, or in the interior of automobiles. Alternatively, it can be incorporated along the curved surface of the exterior.

[0146] Figure 24(A) shows an example of a mobile phone. Mobile phone 7400 has a housing 7401 In addition to the display unit 7402 incorporated into it, there are operation buttons 7403, an external connection port 7404, and It is equipped with a speaker 7405, a microphone 7406, etc. The mobile phone 7400 also has a battery storage function. It has device 7407.

[0147] Figure 24(B) shows the mobile phone 7400 in a curved state. When the 0 is deformed by an external force and the whole thing is curved, the energy storage device located inside is revealed. The 7407 is also bent. Figure 24(C) shows the state of the bent energy storage device 7407 at that time. ) is shown.

[0148] Figure 24(D) shows an example of a bangle-type display device. The portable display device 7100 is The device comprises a housing 7101, a display unit 7102, operation buttons 7103, and a power storage device 7104. Figure 24(E) also shows the state of the bent energy storage device 7104.

[0149] Figure 24(F) shows an example of a wristwatch-type personal information terminal. The personal information terminal 7200 is , housing 7201, display unit 7202, band 7203, buckle 7204, operation button 72 05. It is equipped with input / output terminals 7206, etc.

[0150] The 7200 mobile information terminal offers mobile phone, email, document viewing and creation, music playback, and internet connectivity. - It can run various applications such as network communication and computer games. ru.

[0151] The display unit 7202 has a curved display surface, and displays are made along the curved display surface. Yes, it is possible. Additionally, the display unit 7202 is equipped with a touch sensor, allowing you to touch the screen with your finger or a stylus. It can be operated by doing so. For example, the icon 7207 displayed on the display unit 7202 You can launch the application by touching it.

[0152] The 7205 control button is used for setting the time, turning the power on and off, and turning wireless communication on and off. It has various functions such as operation, silent mode activation and deactivation, and power saving mode activation and deactivation. This can be done. For example, the operation system incorporated into the mobile information terminal 7200 The system also allows you to freely configure the function of the control button 7205.

[0153] Furthermore, the personal information terminal 7200 is capable of performing standardized short-range wireless communication. Yes, for example, by communicating with a wireless headset, hands-free operation is possible. You can also make phone calls.

[0154] Furthermore, the portable information terminal 7200 is equipped with an input / output terminal 7206, and connects to other information terminals via a connector. It can directly exchange data via this. It can also be charged via input / output terminal 7206. It is also possible to perform this operation. Note that charging is performed wirelessly without using input / output terminal 7206. That's fine.

[0155] The portable information terminal 7200 has a power storage device according to one aspect of the present invention. For example, Figure 24(E The energy storage device 7104 shown in ) is placed inside the housing 7201 in a curved state, or in the band 7 It can be incorporated into the 203 in a flexible state.

[0156] Figure 24(G) shows an example of an armband-type display device. The display device 7300 consists of a display unit 7 The device has 304 and has an energy storage device according to one aspect of the present invention. The display device 7300 is a display The display unit 7304 can also be equipped with a touch sensor, and can function as a portable information terminal. It is also possible.

[0157] The display unit 7304 has a curved display surface, and displays are made along the curved display surface. Yes, it is possible. Furthermore, the display device 7300 can communicate via standardized short-range wireless communication, etc. The situation can be changed.

[0158] Furthermore, the display device 7300 is equipped with input / output terminals and can be directly connected to other information terminals via connectors. It can exchange data. It can also be charged via input / output terminals. Furthermore, charging may be performed wirelessly without using input / output terminals.

[0159] Figures 25(A) and 25(B) show an example of a foldable tablet device. The tablet terminal 9600 shown in Figures 25(A) and 25(B) consists of a housing 9630a and a casing. Body 9630b, movable part 9640 connecting housing 9630a and housing 9630b, display unit 96 Display unit 9631 having 31a and display unit 9631b, display mode switching switch 962 6. Power switch 9627, power saving mode switch 9625, fastener 9629, It has an operating switch 9628. Figure 25(A) shows the tablet terminal 9600 opened. Figure 25(B) shows the tablet terminal 9600 in the closed position.

[0160] Furthermore, the tablet terminal 9600 stores energy inside the housings 9630a and 9630b. It has a device 9635. The energy storage device 9635 passes through the movable part 9640 and the housing 9630a and It is installed across the casing 9630b.

[0161] The display unit 9631a can be partially designated as a touch panel area 9632a, and the display will be Data can be entered by touching the operation key 9638. Note that the display unit 963 In 1a, as an example, one half of the area has a display-only function, and the other half of the area The diagram shows a configuration that includes touch panel functionality, but is not limited to this configuration. Display unit 963 The entire area of ​​1a may also be configured to have touch panel functionality. For example, the display unit 96 The entire surface of 31a is used as a touch panel with keyboard buttons, and the display unit 9631b is displayed. It can be used as a screen.

[0162] Furthermore, in the display unit 9631b, similar to the display unit 9631a, a part of the display unit 9631b This can be designated as the touch panel area 9632b. Also, the touch panel keyboard... By touching the location where the display switch button 9639 is displayed with your finger or stylus, Keyboard buttons can be displayed on the display unit 9631b.

[0163] Furthermore, touch panel area 9632a and touch panel area 9632b can be touched simultaneously. You can also input text.

[0164] Additionally, the display mode switch 9626 switches the display orientation, such as portrait or landscape. You can switch between black and white and color displays. Power saving mode switch. The 9625 is detected by the light sensor built into the tablet terminal 9600 when in use. The display brightness can be optimized according to the amount of ambient light. In addition to optical sensors, other detection sensors such as gyroscopes and accelerometers that detect tilt are also used. The device may be built-in.

[0165] Furthermore, Figure 25(A) shows an example where the display area of ​​display unit 9631b and display unit 9631a are the same. However, this is not particularly limited, and one size may be different from the other. The quality of these components may also differ. For example, one display panel may be capable of displaying higher resolution than the other. That is also acceptable.

[0166] Figure 25(B) shows the closed state, and the tablet terminal consists of a housing 9630 and a solar cell 96 33. It has a charge / discharge control circuit 9634 including a DC-DC converter 9636. A power storage body according to one aspect of the present invention can be used in position 9635.

[0167] Furthermore, since the tablet device 9600 is foldable, when not in use, the casing 9630a and The casing 9630b can be folded so that it overlaps with the other casing. By folding it, Because the display units 9631a and 9631b are protected, the tablet terminal 9600 has a durable Durability can be improved. Furthermore, the energy storage device 9635 using an energy storage body according to one aspect of the present invention is It is flexible and its charge / discharge capacity does not easily decrease even after repeated bending and stretching. Therefore, reliability We can provide excellent tablet devices.

[0168] In addition, the tablet devices shown in Figures 25(A) and 25(B) are also available in various forms. Functions to display information (still images, videos, text images, etc.), calendar, date or time, etc. A function that displays information on the display unit, and a touch input operation or editing of the information displayed on the display unit. It has input capabilities, and functions to control processing through various software (programs), etc. It is possible.

[0169] The solar cell 9633 mounted on the surface of the tablet device powers the touch panel. It can be supplied to the display unit or the video signal processing unit, etc. Note that the solar cell 9633 is housed in a casing. A configuration that allows for efficient charging of the energy storage device 9635 by providing it on one or two sides of the body 9630. This is preferable because it allows for the following: The energy storage device 9635 is a lithium-ion battery. Using this method offers advantages such as enabling miniaturization.

[0170] Furthermore, the configuration and operation of the charge / discharge control circuit 9634 shown in Figure 25(B) are shown in Figure 25( A block diagram is shown and explained in C). Figure 25(C) shows the solar cell 9633 and the energy storage device 96 35. DC-DC converter 9636, converter 9637, switch SW1 to SW3, The display unit 9631 is shown, along with the energy storage device 9635, and the DC-DC converter 9636. Converter 9637 and switches SW1 to SW3 form the charge / discharge control circuit shown in Figure 25(B). This corresponds to the section for 9634.

[0171] First, let's explain an example of operation when electricity is generated by the solar cell 9633 using ambient light. The electricity generated by the solar panel is converted to a DC-DC converter to provide the voltage needed to charge the 9635 energy storage device. The converter 9636 performs voltage boosting or bucking. Then, the solar power is used to control the operation of the display unit 9631. When power from pond 9633 is used, switch SW1 is turned ON, and converter 963 In step 7, the voltage is increased or decreased to the required voltage for the display unit 9631. Also, the display unit 963 If you do not want to display in step 1, turn off SW1 and turn on SW2 to activate the energy storage device 9635 The configuration should be such that it charges the device.

[0172] The solar cell 9633 is shown as an example of a power generation method, but it is not particularly limited to this method. Energy storage using other power generation methods such as electrical elements (piezo elements) and thermoelectric conversion elements (Peltier elements) The device 9635 may also be configured to charge. For example, power may be transmitted and received wirelessly (contactless). This includes contactless power transmission modules that charge via this method, as well as configurations that combine this with other charging methods. You may do so.

[0173] Figure 26 shows an example of another electronic device. In Figure 26, the display device 8000 is one of the present inventions. This is an example of an electronic device using the energy storage device 8004 according to the embodiment. Specifically, the display device 800 0 corresponds to a display device for receiving TV broadcasts, and consists of a housing 8001, a display unit 8002, and a speaker unit. The present invention includes 8003, an energy storage device 8004, etc. An energy storage device 8004 according to one aspect of the present invention is a housing It is located inside the body 8001. The display device 8000 receives power from the commercial power supply. It is possible to use the electricity stored in the energy storage device 8004, or to use the electricity stored in the energy storage device 8004. Even when power cannot be supplied from the commercial power source due to a power outage, etc., according to one aspect of the present invention By using the energy storage device 8004 as an uninterruptible power supply, the display device 8000 can be used. ru.

[0174] The display unit 8002 has light-emitting elements such as liquid crystal display devices and organic EL elements in each pixel. Equipment, electrophoresis display device, DMD (Digital Micromirror Display) ce), PDP (Plasma Display Panel), FED (Field Semiconductor display devices such as Emission Displays can be used.

[0175] In addition to being used for receiving TV broadcasts, display devices are also used for personal computers, advertising displays, and more. This includes all information display devices.

[0176] In Figure 26, the fixed lighting device 8100 is a power storage device 81 according to one aspect of the present invention. This is an example of an electronic device using 03. Specifically, the lighting device 8100 has a housing 8101 and light It has a power source 8102, a power storage device 8103, etc. In Figure 26, the power storage device 8103 is housed in the casing 81 An example is provided where 01 and the light source 8102 are installed inside the ceiling 8104. However, the energy storage device 8103 may be located inside the housing 8101. The 8100 can receive power from the commercial power supply, or it can store power in the energy storage device 8103. It is also possible to use the accumulated power. Therefore, if power is not supplied from the commercial power source due to a power outage, etc. Even when it is not possible to receive power, the energy storage device 8103 according to one aspect of the present invention can be used as an uninterruptible power supply. This makes it possible to use the lighting device 8100.

[0177] Note that Figure 26 illustrates a fixed lighting device 8100 installed on the ceiling 8104. However, in one aspect of the present invention, the energy storage device has a ceiling 8104, for example, a side wall 8105, a floor 8 106, It can also be used in fixed lighting devices installed in windows 8107, etc., and on a tabletop It can also be used in lighting fixtures and other similar devices.

[0178] Furthermore, the light source 8102 can be an artificial light source that uses electricity to artificially produce light. Specifically, this includes incandescent light bulbs, discharge lamps such as fluorescent lamps, and light-emitting elements such as LEDs and organic EL elements. The element is an example of the artificial light source mentioned above.

[0179] In Figure 26, the air conditioner having an indoor unit 8200 and an outdoor unit 8204 is, This is an example of an electronic device using a power storage device 8203 according to one aspect of the present invention. Specifically, indoor The unit 8200 includes a housing 8201, an air outlet 8202, a power storage device 8203, etc. (See Figure 26) This example illustrates the case where the energy storage device 8203 is installed in the indoor unit 8200, but energy storage Device 8203 may be installed on the outdoor unit 8204. Alternatively, it may be installed on the indoor unit 8200 and the outdoor unit. Both units 8204 may be equipped with energy storage devices 8203. (Air conditioner) It can receive power from the commercial power supply, or from the energy stored in the energy storage device 8203. It is also possible to use force. In particular, both the indoor unit 8200 and the outdoor unit 8204 have energy storage devices 82 If 03 is provided, when power cannot be supplied from the commercial power source due to a power outage, etc. Furthermore, by using the energy storage device 8203 according to one aspect of the present invention as an uninterruptible power supply, an air conditioner Conditioner can be used.

[0180] Note that Figure 26 shows a separate-type air conditioner consisting of an indoor unit and an outdoor unit. As an example, an integrated air conditioner has both the indoor and outdoor unit functions in a single housing. A power storage device according to one aspect of the present invention can also be used as the conditioner.

[0181] In Figure 26, the electric refrigerator 8300 is connected to a power storage device 8304 according to one aspect of the present invention. This is an example of the electronic equipment used. Specifically, the electric refrigerator 8300 consists of a casing 8301 and a refrigerator. It has a storage room door 8302, a freezer room door 8303, an energy storage device 8304, etc. Figure 26 shows the storage The electrical unit 8304 is installed inside the housing 8301. The electric refrigerator 8300 is It can also receive power from the commercial power supply, or it can use the power stored in the energy storage device 8304. It can also be used. Therefore, when power cannot be supplied from the commercial power source due to a power outage, etc. However, by using the energy storage device 8304 according to one aspect of the present invention as an uninterruptible power supply, electric cooling The 8300 freezer / refrigerator will become available for use.

[0182] Of the electronic devices mentioned above, high-frequency heating devices such as microwave ovens and electric rice cookers are also included. The equipment requires high power in a short period of time. Therefore, it needs to supplement the power that cannot be supplied by the commercial power supply. As an auxiliary power source for this purpose, by using the energy storage device according to one aspect of the present invention, the electronic equipment This prevents the commercial power circuit breaker from tripping during use.

[0183] Furthermore, during periods when electronic devices are not in use, especially the total amount of electricity that can be supplied by the commercial power source... During periods when the proportion of electricity actually used (called the electricity usage rate) is low, energy storage is used. By storing power in the device, the increase in power usage outside of the above-mentioned time period is suppressed. It is possible. For example, in the case of the electric refrigerator 8300, when the temperature is low, the refrigerator door 830 2. At night when the freezer door 8303 is not opened or closed, power is stored in the energy storage device 8304. And as the temperature rises, the refrigerator door 8302 and the freezer door 8303 are opened and closed. During the daytime, by using the energy storage device 8304 as an auxiliary power source, the daytime power usage rate It can be kept low.

[0184] Furthermore, when a battery storage device is installed in a vehicle, hybrid electric vehicles (HEVs) and electric vehicles (EVs) can be used. Alternatively, it could lead to the realization of next-generation clean energy vehicles such as plug-in hybrid vehicles (PHEVs). can.

[0185] Figure 27 illustrates a vehicle using one aspect of the present invention. Figure 27(A) shows automobile 8 The 400 is an electric vehicle that uses an electric motor as its power source for driving. Alternatively, The vehicle can appropriately select and use an electric motor and an engine as power sources for propulsion. This is a hybrid vehicle. By using one aspect of the present invention, a vehicle with a long driving range can be realized. It is possible. Furthermore, the automobile 8400 has a power storage device. The power storage device powers the electric motor. In addition to driving, it also provides light-emitting devices such as headlights 8401 and interior lights (not shown). It can supply power to it.

[0186] Furthermore, the energy storage device is used for the speedometer, tachometer, and other displays of the 8400 automobile. It can supply power to the device. In addition, the energy storage device is the navigation system of the 8400 car. It can supply power to semiconductor devices such as ignition systems.

[0187] The automobile 8500 shown in Figure 27(B) is plugged into the energy storage device of the automobile 8500. It can be charged by receiving power from an external charging facility using methods such as contactless power supply. Figure 27(B) shows the power supply from the ground-mounted charging device 8021 to the vehicle 8500. This shows the state in which the power device is being charged via cable 8022. The electrical method and connector standards are as specified by CHAdeMO® or Combo. It is fine to proceed as appropriate. The charging device 8021 may be a charging station installed in a commercial facility. It could also be a household power supply. For example, external power supply via plug-in technology. This allows charging of the battery storage device installed in the 8500 vehicle. Charging is performed via AC / DC. This can be done by converting AC power to DC power via a conversion device such as a converter.

[0188] Although not shown in the diagram, a power receiving device is mounted on the vehicle, and power is supplied wirelessly from a ground-based power transmission device. It can also be charged by doing so. In this contactless power supply method, power transmission equipment is installed in roads or exterior walls. By incorporating this, charging can be performed not only when the vehicle is stopped but also while it is in motion. Furthermore, this contactless power supply... This method may be used to transmit and receive power between vehicles. Furthermore, the exterior of the vehicle Solar panels may be installed to charge the energy storage device when the vehicle is stopped or in motion. Electromagnetic induction or magnetic resonance methods can be used to supply power to it.

[0189] According to one aspect of the present invention, the cycle characteristics of the energy storage device are improved, thereby enhancing reliability. This can be done. Furthermore, according to one aspect of the present invention, the characteristics of the energy storage device can be improved, This means the energy storage device itself can be made smaller and lighter. This contributes to reducing the vehicle's weight, thus improving its driving range. Furthermore, it can be mounted on the vehicle. The energy storage device can also be used as a power source other than for vehicles. In this case, the power demand This allows us to avoid using commercial power during peak hours.

[0190] This embodiment can be implemented in appropriate combination with other embodiments. [Explanation of Symbols]

[0191] 100 Energy Storage Units 101 Positive electrode 102 Negative electrode 103 Separator 104 Positive lead 105 Negative lead 106 Electrolyte 107 Exterior 115 Sealing layer 118 Joint 119 Inlet 150 Energy Storage Units 201 Bonding Dye 202 Bonding Dye 203 Protrusion 210 Connection Area 220 Curved section 1700 curved surface 1701 Plane 1702 Curve 1703 Radius of curvature 1704 Center of curvature 1800 Center of curvature 1801 film 1802 radius of curvature 1803 film 1804 radius of curvature 1805 Battery Materials 6003 Cathode active material 6004 Conductive additive 6005 Binder 6103 Negative electrode active material 6105 Binder 7100 Portable Display Device 7101 enclosure 7102 Display section 7103 Operation Buttons 7104 Energy storage device 7200 Mobile Information Terminal 7201 enclosure 7202 Display section 7203 Band 7204 Buckle 7205 Operation Buttons 7206 Input / output terminal 7207 Icons 7300 display device 7304 Display section 7400 mobile phones 7401 enclosure 7402 Display section 7403 Operation Buttons 7404 External connection port 7405 Speaker 7406 Microphone 7407 Energy storage device 8000 display device 8001 enclosure 8002 Display section 8003 Speaker section 8004 Energy Storage Device 8021 Charging device 8022 Cable 8100 Lighting device 8101 enclosure 8102 Light source 8103 Energy storage device 8104 Ceiling 8105 Side wall 8106 floor 8107 Window 8200 indoor unit 8201 enclosure 8202 Air outlet 8203 Energy Storage Device 8204 Outdoor unit 8300 Electric Refrigerator / Freezer 8301 enclosure 8302 Refrigerator door 8303 Freezer door 8304 Energy storage device 8400 automobiles 8401 Headlight 8500 automobiles 9600 Tablet devices 9625 Switch 9626 Switch 9627 Power switch 9628 Operation switch 9629 Ingredients 9630 cabinet 9631 Display section 9633 Solar Cell 9634 Charge / Discharge Control Circuit 9635 Energy storage device 9636 DC-DC converter 9637 Converter 9638 Operation Keys 9639 button 9640 Moving parts 101a Positive electrode current collector 101b Positive electrode active material layer 102a Negative electrode current collector 102b Negative electrode active material layer 150A Energy Storage Unit 150B Energy storage body 150C power storage body 200A Energy Storage Unit 200B Energy storage body 200C power storage body 200D Energy Storage Unit 200E Energy storage body 200F electricity storage body 200G power storage 200H electricity storage body 9630a enclosure 9630b enclosure 9631a Display section 9631b Display section 9632a area 9632b area

Claims

[Claim 1] A power storage device comprising a positive electrode, a negative electrode, a separator, and an electrolyte, with the cross-sectional shape of the irregularities on the outer casing being corrugated, wherein the outer casing has continuous irregularities on at least a portion of its surface, The aforementioned energy storage body is flexible, At least a portion of the cross-sectional shape of the irregularities of the exterior body includes a curve, At least a portion of the cross-sectional shape of the irregularities of the exterior body includes a straight line, The aforementioned exterior body is characterized by being a laminate of a metal film and a thermoplastic film.

Images