Terminal equipment

Abstract

To provide a battery module with excellent impact resistance, provide a battery module that uses an elastic material such as rubber for an exterior that covers a battery, and provide a bendable battery module.SOLUTION: An elastic material such as rubber is used as an exterior body that covers a battery, and the exterior body is molded in two steps. First, a first mold is used to mold a first portion with a recess in which the battery is housed. Next, the battery is inserted into the first portion. Next, a second mold is used to perform a second molding step to fill the opening of the recess in the first portion, forming a second portion. The second portion functions as a lid that closes the opening of the recess in the first portion. The second portion is formed so as to contact a part of the battery's electrodes and a part of the edge of the second exterior body of the battery.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] One aspect of the present invention relates to a battery. One aspect of the present invention relates to a battery module including a battery. One aspect of the present invention relates to a battery that can be attached to an electronic device. This relates to electronic devices driven by a resistor.

[0002] Note that one embodiment of the present invention is not limited to the above technical fields. The technical field of one embodiment of the present invention is a semiconductor device, a display device, a light-emitting device, a power storage device, a memory device, Electronic device, lighting device, input device, input / output device, driving method thereof, or manufacturing method thereof can be cited as an example. [Background technology]

[0003] Mobile information terminal devices, such as smartphones and tablet devices, are being actively developed. In addition, such electronic devices are required to be lightweight and small. .

[0004] In particular, in recent years, the development of wearable electronic devices has become more widespread. Examples of wearable devices include wristwatch-type devices worn on the arm and head-mounted devices. Examples include goggle-type or goggle-type devices, and necklace-type devices worn around the neck. For example, a wristwatch-type device has a small display instead of the dial of a conventional watch. This makes it possible to provide the user with various information other than the time. The device is also attracting attention for its medical applications and self-management of health status, and is being put into practical use. .

[0005] Portable devices often have secondary batteries that can be repeatedly charged. Rechargeable devices use small secondary batteries, which are lightweight, small, and have a long life. It is required that time be available.

[0006] For example, Patent Document 1 discloses a flexible secondary battery that uses a film for the exterior. A wearable device is disclosed. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-038868 Summary of the Invention [Problem to be solved by the invention]

[0008] Secondary batteries use film for the exterior because there is a risk of heat generation or fire if the exterior is damaged. Even if the device is made of a hard material, it is generally covered with a hard outer covering. In this structure, it is not assumed that the secondary battery will be bent or otherwise deformed, and it is However, there was a problem in that the location of the device was limited.

[0009] One embodiment of the present invention is a battery module that has excellent impact resistance and can be mounted on or connected to an electronic device. One of the goals is to provide a system that allows users to easily access the information.

[0010] One aspect of the present invention is a battery module using an elastic material such as rubber as an exterior body that covers a battery. An object of one embodiment of the present invention is to provide a bendable battery module. One of the objectives is to provide a module.

[0011] One aspect of the present invention provides a battery module that can be used as a mounting fixture for an electronic device. Alternatively, a battery that can be used as a bendable attachment is also provided. One of the objectives is to provide a remote module.

[0012] Alternatively, one aspect of the present invention is to prevent the problem of the battery being damaged by excessive bending. It is an object of the present invention to provide a battery module that is suppressed or bendable. One object is to provide a battery module with a limited range.

[0013] Another object of one embodiment of the present invention is to provide an electronic device that can be used for a long time. Or, to provide electronic devices or battery modules with excellent design. Alternatively, a battery module that can be easily attached to and detached from an electronic device can be provided. Another object of the present invention is to provide a highly waterproof electronic device or a battery module. Alternatively, it is an object of the present invention to provide a novel battery module or electronic device. One of our goals is to provide

[0014] Another aspect of the present invention is an electronic component having excellent impact resistance, or a module including the electronic component. One of the goals is to provide a system that allows users to easily access the information. [Means for solving the problem]

[0015] One aspect of the present invention is a battery module having a first exterior body and a battery. The battery includes a second exterior body, a positive electrode, a negative electrode, an electrolyte, and a pair of tabs. The positive electrode, the negative electrode, and the electrolyte are located in a second exterior body. The first exterior body is provided so as to protrude from the inside to the outside. The first exterior body includes a material exhibiting elasticity. The housing includes a first portion, a second portion, and a space surrounded by the first portion and the second portion. The second exterior body is disposed in the space, and the first portion and the second portion are mutually The second portion is in contact with a part of the tab and an end of the second exterior body.

[0016] In the above, the first portion and the second portion contain the same material, and It is preferable that the second portion is directly bonded to the first portion.

[0017] In the above, the second portion has a smaller volume or surface area than the first portion. is preferred.

[0018] In the above, the second exterior body preferably has a film shape. It is preferable that the second exterior body deforms in accordance with the deformation of the first exterior body when the first exterior body is deformed. It's nice.

[0019] In the above, it is preferable that a protective member is provided inside the first exterior body. The protective member includes a third portion covering one of two opposing surfaces of the second exterior body and a fourth portion covering the other. It is preferable that the third and fourth portions have a plate-like shape. It is preferable that the first exterior body has a first shape and be deformed in accordance with the first exterior body.

[0020] The protective member has a third portion and a fourth portion on the second portion side of the first exterior body. It is preferable that the bonding is performed at the above-mentioned position.

[0021] In addition, it is preferable that the third portion and the fourth portion of the protection member have different lengths. stomach.

[0022] In the above, the first portion of the first exterior body is connected to the third portion of the protection member and the fourth portion of the protection member. Preferably, the portions have a gap for slidable fit.

[0023] In the above, the first exterior body has a strip shape and a thickness of 5 mm or less. It is preferable that the region has a

[0024] In the above, it is preferable that the device has a circuit board. In this case, the circuit board has a tab. The second portion of the first exterior body preferably has a terminal for electrically connecting to the terminal. It is preferable that the heat sink is provided so as to cover the heat sink and at least a part of the circuit board.

[0025] The circuit board preferably has a protection circuit.

[0026] In the above, it is preferable that the device has a frame. In this case, the frame is an exterior The frame preferably includes a material having a higher rigidity than the body. The first terminal is a terminal electrically connected to the tab. The second terminal is a terminal electrically connected to the first terminal. It is preferable that this portion is provided so as to cover a part of the frame and a part of the first terminal. Moreover, it is preferable that the second terminal is provided so that at least a part of it is exposed.

[0027] Another embodiment of the present invention is an electronic device having a housing. a third terminal having an engaging shape and electrically connecting with the second terminal when engaged with the frame; It is preferable that the terminal be provided.

[0028] Another aspect of the present invention is a battery pack having a first exterior body that covers the battery. The method for manufacturing a battery module includes the following first to fourth steps: The second step is a step of preparing a battery having a second exterior body and a pair of electrodes. The process includes forming a first portion having a recess by molding a first material using a first mold. The third step is to form the electrode so that a part of the electrode protrudes outward beyond the opening edge of the recess. The fourth step is to insert the battery into the recess from the open end side. The inserted first portion is placed in a second mold, and the second mold is used to mold the second material. Thus, a second portion that seals the open end of the recess is formed, and the first portion and the second portion are joined together. The second portion is a step of forming a first exterior body having a first end portion and a second end portion. and a part of the electrode is exposed outside the second portion.

[0029] In the above-mentioned manufacturing method, the electrode is a tab protruding from the second exterior body, or It is preferable that the terminal be one of the terminals electrically connected to the block.

[0030] In the above-mentioned manufacturing method, the first material and the second material are the same material. preferable.

[0031] In the above manufacturing method, a millable material is used for the first material and the second material. The first portion and the second portion are formed by direct pressure molding, direct pressure injection molding, or injection molding. It is preferable to do so.

[0032] Alternatively, the first material and the second material may be liquid or paste-like materials, and the first portion may be Preferably, the first portion and the second portion are formed by injection molding. [Effects of the Invention]

[0033] According to one aspect of the present invention, there is provided a battery that is highly shock-resistant and can be mounted on or connected to an electronic device. A remodule can be provided.

[0034] According to one aspect of the present invention, a battery module using an elastic material such as rubber for the exterior body that covers the battery. According to one aspect of the present invention, a bendable battery module can be provided. We can provide you with the following:

[0035] According to one aspect of the present invention, a battery module that can be used as a mounting fixture for an electronic device is provided. Alternatively, a battery module that can be used as a bendable attachment can be provided. can provide.

[0036] Alternatively, according to one aspect of the present invention, the battery may be damaged by excessive bending. This allows the provision of a battery module with reduced bending or a limited range of bending. This makes it possible to provide a battery module with a high

[0037] According to one embodiment of the present invention, an electronic device that can be used for a long period of time can be provided. This makes it possible to provide electronic devices or battery modules with excellent design. It is possible to provide a battery module that can be easily attached to and detached from the device. Alternatively, a new battery module or can provide electronic equipment.

[0038] Another aspect of the present invention is an electronic component having excellent impact resistance, or a module including the electronic component. We can provide rules. [Brief explanation of the drawings]

[0039] [Figure 1] 1A to 1C illustrate a configuration example and a manufacturing method of a battery module according to an embodiment. [Figure 2] 1A to 1C illustrate a configuration example and a manufacturing method of a battery module according to an embodiment. [Figure 3] 1A to 1C illustrate a configuration example and a manufacturing method of a battery module according to an embodiment. [Figure 4] 1 shows an example of the configuration of a battery and a battery module according to an embodiment. [Figure 5] 1A to 1C are diagrams illustrating a method for manufacturing a battery module according to an embodiment. [Figure 6] 1 shows a configuration example of a battery module according to an embodiment. [Figure 7] 1 shows a configuration example of a battery module according to an embodiment. [Figure 8] 1 shows a configuration example of a battery module according to an embodiment. [Figure 9] 1 shows an example of the configuration of a battery module and an electronic device according to an embodiment. [Figure 10] 10A and 10B illustrate configuration examples of a frame and an electronic device according to an embodiment. [Figure 11] 1A to 1C are diagrams illustrating a method for manufacturing a battery module according to an embodiment. [Figure 12] 1A to 1C are diagrams illustrating a method for manufacturing a battery module according to an embodiment. [Figure 13] 1 shows an example of the configuration of a secondary battery according to an embodiment. [Figure 14] 1A to 1C illustrate a method for manufacturing a secondary battery according to an embodiment. [Figure 15] 1A to 1C illustrate a method for manufacturing a secondary battery according to an embodiment. [Figure 16] 1A to 1C illustrate a method for manufacturing a secondary battery according to an embodiment. [Figure 17] 1A to 1C illustrate a structural example and a manufacturing method of a secondary battery according to an embodiment. [Figure 18]1A to 1C illustrate a method for manufacturing a secondary battery according to an embodiment. [Figure 19] 1 shows an example of the configuration of a battery according to an embodiment. [Figure 20] 1 is a photograph of a battery module according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0040] The embodiments will be described in detail with reference to the drawings. However, the present invention is not limited to the following description. The present invention is not limited to the above embodiments, and various changes and modifications may be made in form and detail without departing from the spirit and scope of the present invention. Therefore, the present invention is based on the following embodiments. The present disclosure should not be construed as being limited to the contents of the preceding paragraph.

[0041] In the configuration of the invention described below, the same parts or parts having similar functions are The same reference numerals are used in common between different drawings, and repeated explanations thereof will be omitted. When referring to a function, the hatch pattern may be the same and no particular symbol may be assigned.

[0042] In each figure described in this specification, the size, layer thickness, or area of ​​each component is The figures may be exaggerated for clarity and are not necessarily limited to that scale. stomach.

[0043] In this specification, ordinal numbers such as "first" and "second" are used to avoid confusion of components. The number is not a numerical limitation.

[0044] (Embodiment 1) One aspect of the present invention is a battery module having a battery and a first exterior body that covers the battery. It's Joules.

[0045] The battery has a positive electrode, a negative electrode, an electrolyte, and a second exterior body that covers them. The battery is electrically connected to the positive electrode or the negative electrode and has a pair of electrodes protruding outside the second exterior body. The positive electrode and the negative electrode each have a current collector and an active material. The battery may have a separator to prevent electrical shorting between the positive and negative electrodes. The electrolyte may be either a liquid electrolyte or a solid electrolyte.

[0046] By using a film-like material for the second exterior body, the battery can be made flexible. can be done.

[0047] The first exterior body is provided to cover the battery and has the function of protecting the battery. By using an elastic material such as rubber or elastic resin as the exterior of the battery module, This can improve the impact resistance of the roller.

[0048] The first exterior body has a shape that can be used as a wearable device attachment. Typically, the band (also called a belt or strap) of a wristwatch-type device ) shape. This allows the battery module to be mounted on the It can be used as a power source (main power source or auxiliary power source).

[0049] When molding rubber or elastic resin into any shape using a mold, It is necessary to apply high pressure. In addition, when the structure is placed inside the mold, it is necessary to When molding is performed, a large amount of pressure is applied isotropically to the structure. When molding the first exterior body with the teri placed in the mold, the battery may be damaged by the pressure. The film may deform and cause damage. When a battery using the above is used, it is not possible to mold rubber or the like as the first exterior body that covers the battery. It was difficult.

[0050] Also, when molding rubber, etc., it is used to soften the material, or to crosslink or heat harden the material. In order to achieve this, the battery needs to be placed inside the mold at a high temperature. If the battery is heated too much, the heat may cause the battery to deteriorate. Not only batteries using film, but also batteries using relatively rigid materials However, it is difficult to mold rubber or the like to cover this.

[0051] Therefore, one aspect of the present invention is characterized in that the first exterior body is molded in two separate steps. First, a first mold is used to mold a first portion having a recess in which a battery is housed. The first part has a bag-like shape with a pocket for storing the battery. The opening of the recess that constitutes the pocket is formed. The opening of the recess is The size should be determined taking into consideration the size, and it is preferable that it is as small as possible.

[0052] A pocket (recess) is formed in advance in the first portion, and the opening shape and the pocket shape are determined. By making the shape of the battery match, the battery can be inserted into the correct position. The battery can be placed in the first external housing, and the positional deviation between the first external housing and the battery can be prevented. In particular, it is possible to prevent the battery from bending in one direction. When used, it is important to precisely control the positions of the first external housing and the battery.

[0053] Next, insert the battery into the first part. At this time, the battery terminals (tabs or A part of the electrode of the circuit board, etc. to which the tab is connected, is located outside the opening end of the recess in the first part. Insert the battery so that it is positioned correctly.

[0054] Next, a second mold is used to perform a second molding so as to fill the opening of the recess in the first portion. The second part acts as a lid to close the opening of the recess of the first part. The second part is a part of the electrode of the battery and an end of the second exterior body of the battery. When the second part is molded, the positive and negative electrodes of the battery are provided. It is preferable that the second portion is not molded to a position where the second portion is formed. This prevents pressure from being applied to the main part of the battery when molding the battery. This prevents deformation and damage. When using a film, the seal on the tab side of the battery (also called the top seal) It is preferable that the second portion is formed adjacent to and in contact with the first portion.

[0055] Also, when high temperatures are required for molding rubber, etc., the first outer layer is heated in two steps like this. By molding the battery housing, the battery is exposed to high temperatures only once. Therefore, deterioration of the battery during molding of the first external housing can be suppressed.

[0056] This allows the molding of a first exterior body having a space formed inside. In the housing, the first part and the second part are directly joined. A boundary line (parting line) may be formed between them.

[0057] The battery module thus formed has a structure in which the battery and the first exterior body are connected to the second That is, the battery is fixed at the part where it contacts the second part. The battery is enclosed in the first exterior body with the other parts left unfixed. Since the back cover and the first part are not fixed together, when the first part is deformed by bending or other deformation, the back cover The battery and the housing can be deformed independently of each other. If the first part is joined to the second part, deformation of the first part will cause stress in the battery. On the other hand, in a battery module according to one aspect of the present invention, the battery and the first outer casing Since the first exterior body is not joined to the second exterior body, the first exterior body can be deformed with a smaller force. do.

[0058] The battery module of one embodiment of the present invention and a manufacturing method thereof will be described below in more detail. Let me explain in detail.

[0059] [Configuration example 1] Here, the battery module is preferably mounted on a wristwatch-type electronic device. The following explanation will be given using an example of a band-shaped form that can be used to change the shape of the mold. It goes without saying that battery modules of various shapes can be produced by changing the .

[0060] FIG. 1(A) shows the first part 2 of the exterior body 20 of the battery module 10 shown in FIG. 1(E). 1. The mold 50a is a schematic cross-sectional view of a mold 50a for molding the mold 1. The mold 50a is made up of an upper mold 51a and a lower mold 51b. The upper mold 51a has a core 53, a core 54a, a core 54b, etc. In practice, in addition to the injection hole 55a, a vent hole is provided in the upper mold 51. Alternatively, the vent holes may not be provided.

[0061] The core 53 is a member for forming a recess in the first portion 21 after molding. The core 54b is a member for forming a through hole in the first portion 21 after molding. The core is called a core or a core cylinder. Sometimes it is called.

[0062] The material is molded using a mold 50a shown in FIG. 1(A) to form a first portion 21 shown in FIG. 1(B). can be formed.

[0063] The first portion 21 can be formed by a method using a solid or semi-solid material (collectively referred to as "millable"). A molding method using a mold material (also called a mold material) or a liquid (including paste) material As a molding method using millable material, direct pressure molding can be used. (also called compression molding), direct pressure injection molding (also called transfer molding), injection molding There are also other molding methods that use liquid materials, such as injection molding. One of the methods is injection molding, especially LIM (Liquid Injection Molding). It is sometimes called the ng method.

[0064] The mold 50a shown in Fig. 1(A) is a mold suitable for direct pressure injection molding. The material is placed in the portion, and the pressing mold is further pressed from above, so that the material is poured from the injection hole 55a. The mold 50a can be configured to have an injection hole with a different position and shape depending on the molding method. may be changed appropriately.

[0065] As the molding material, an elastic material can be suitably used. By surrounding the battery module with a flexible body, the battery module 10 can be manufactured with excellent impact resistance. (See FIG. 1(E)). In addition, a bendable battery can be used as the battery 30. By using this battery module, it is possible to realize a battery module 10 that can be wrapped around the arm, etc. do.

[0066] As the rubber material, a material exhibiting thermosetting properties can be suitably used. By using rubber materials, the heat resistance of the product can be improved, and the usable temperature range can be expanded. Furthermore, the use of rubber materials can improve chemical resistance and weather resistance.

[0067] As the rubber material, typically, materials such as silicone rubber or fluororubber are used. Silicone rubber and fluororubber are easy to mold and are well suited for products that come into contact with the human body. It can be used appropriately.

[0068] Other rubber materials include natural rubber, styrene-butadiene rubber, and isoprene rubber. , butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, butyl rubber , urethane rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, etc. Fees can be used.

[0069] As the resin material, a thermoplastic elastomer that exhibits rubber elasticity at room temperature is preferably used. By using a thermoplastic elastomer, it is possible to Compared to styrene-based elastomers and olefin-based Elastomer, ester elastomer, amide elastomer, PVC (polyvinyl chloride) It is possible to use elastomers such as urethane elastomers, fluorine elastomers, etc. can.

[0070] A cross-sectional schematic diagram of the first portion 21 formed as described above is shown in FIG. 1(B), and a perspective schematic diagram is shown in FIG. As shown in FIG. 2(A), the first portion 21 has a strip shape. The first portion 21 has an opening on the short side. The recess 23 has a mouth end 24. The shape of the recess 23 is determined by the battery 30 described later. It is designed to fit.

[0071] The first portion 21 formed using the mold 50a shown in FIG. 1(A) is shown in FIGS. 1(B) and 2 As shown in (A), the vicinity of the open end 24 has a shape that looks like it has been notched obliquely. This allows the area of ​​the open end 24 to be increased, and the battery 30 can be assembled in the following steps. In addition, the second portion 2 of the exterior body 20 of the battery module 10 (described later) can be easily inserted. 2, the bonding area is increased, and the bonding strength can be increased (FIG. 1(E) and FIG. 2( See C).

[0072] Next, the battery 30 is inserted into the recess 23 from the open end 24 side of the first portion 21 ( Figure 1(C), Figure 2(B)).

[0073] The battery 30 has an exterior body 31 and a pair of tabs 32. The case 31 contains a positive electrode, a negative electrode, and a The pair of tabs 32 are electrically connected to the positive electrode or the negative electrode, respectively. , which protrudes out of the exterior body 31. The exterior body 31 has a tab 32 disposed thereon. The opposite side (also called the bottom) is folded and the three sides are sealed. Here, of the three sealed sides of the exterior body 31, the side on the tab 32 side is sealed with a top seal. The other two sides are sometimes called side seals. The internal structure of the battery 30 is omitted.

[0074] The battery 30 has at least a portion of the tab 32 overlapping the open end 24 and the other portions of the tab 32. The battery 30 is disposed so that a part of the battery 30 protrudes outward beyond the opening end 24. The battery is inserted so that the end (top seal portion) of the body 31 on the tab 32 side is positioned at the opening end 24. 30 may be placed.

[0075] As shown in FIG. 1C, when the battery 30 is inserted into the first portion 21, There may be a gap between the bottom of the battery 30 and the first portion 21. When the battery 30 is arranged so as to pass through the neutral plane of the exterior body 31, no gap is provided. The battery 30 may be arranged so that the bottom and the first portion 21 are in contact with each other.

[0076] Next, as shown in FIG. 1(D), the battery 30 and the first part 21 are connected to the second part 2. 2 is placed in a mold 50b for molding.

[0077] The mold 50b has an upper mold 52a, a lower mold 52b, etc. In addition, in FIG. 1(D), a core 54a and The upper mold 52a has a casting hole 55b. The mold 52a or the lower mold 52b has a vent hole (not shown).

[0078] The mold 50b has injection holes 55b disposed only near the open end 24 of the first portion 21. This allows the molding material to be injected only near the open end 24. During assembly, the battery 30 is secured to the portion located near the open end 24 (the tab 32 and the exterior body). The pressure applied during molding is only applied to the top seal of 31, etc., and not to other parts. Therefore, the exterior body 31 of the battery 30 is prevented from being deformed and damaged. In addition, the tab 32 and the top seal portion of the exterior body 31 are thin, and the inside Since it is not a hollow structure, it may deform slightly when pressure is applied during molding, but it will not break. There is no risk of this happening.

[0079] By molding the material using a mold 50b shown in FIG. 1(D), the second portion 21 is in contact with the first portion 21. This allows the first portion 21 and the second portion 22 to be formed. It is possible to manufacture an exterior body 20 having the above structure.

[0080] The molding method for the first portion 21 can be used as the molding method for the second portion 22. The second part 22 can be formed by the same method as the first part 21, since the equipment can be shared. preferable.

[0081] It is also preferable that the second portion 22 is made of the same material as the first portion 21. This makes it possible to improve the adhesion between the first portion 21 and the second portion 22.

[0082] The first portion 21 and the second portion 22 may be made of different materials or may have different compositions. For example, the first portion 21 may be made of a millable thermosetting rubber material. It is formed by transfer molding using a material that has improved weather resistance and chemical resistance. The second portion 22 is then formed by injection molding using a liquid thermoplastic elastomer material. By doing so, the second portion 22 can be formed with low pressure. This makes it possible to more effectively reduce damage to the battery 30.

[0083] The above is an explanation of an example of the manufacturing method.

[0084] 1(E) and 2(C) show the battery module 10. The portable terminal 0 includes an exterior body 20 and a battery 30.

[0085] The second portion 22 is directly bonded to the first portion 21. The opening end 24 of the portion 21 of the outer casing 2 is filled in. 0, a space 25 is formed between the first portion 21 and the second portion 22. A portion of 30 is located within space 25 .

[0086] A portion of the tab 32 of the battery 30 protrudes from the second portion 22 and is exposed to the outside. The tab 32 is connected to a terminal of an electronic device to which the battery module 10 is connected, or to another circuit board, etc. Electrical connection can be made.

[0087] The other part of the tab 32 of the battery 30 and the top seal part of the exterior body 31 are the second part. The battery 30 is provided in contact with the second portion 22 of the exterior body 20. Furthermore, the other parts of the exterior body 31 and the first part 21 are not bonded together. Therefore, when the first portion 21 is deformed, for example, by bending, the outside of the battery 30 Since the housing 31 and the first portion 21 can deform independently of each other, a smaller force is required. You can bend these with

[0088] In addition, as an example, the exterior body 20 of the battery module 10 is formed so as to have a through hole in the width direction. The hole 26a provided on the tab 32 side is For example, it is intended to be connected to the housing (case) of an electronic device using a spring bar or the like. The hole 26b is for attaching a buckle or the like.

[0089] In the exterior body 20, the first portion 21 formed first is larger than the second portion 22 formed later. Specifically, the second portion 22 has a larger volume or thickness than the first portion 21. The second portion 22 has a small surface area. Alternatively, the second portion 22 has a small width, length, and It can also be said that at least one of the thicknesses is smaller than that of the first portion 21. By forming the second portion 22 smaller, the load on the battery 30 during the formation of the second portion 22 is reduced. The load can be reduced.

[0090] The above is the description of configuration example 1.

[0091] [Variation 1] 3(A) to 3(D) are schematic cross-sectional views of each stage in the example of the fabrication method described below. The method exemplified here uses a mold 50c and mold 50b having different shapes compared to the above-mentioned manufacturing method example. The difference is that it uses 50d.

[0092] In the above-described example of the manufacturing method, as shown in FIG. 1(B) and FIG. 2(A), the first portion 21 is opened. The shape is such that the vicinity of the mouth end 24 is cut obliquely. The molding material is inserted into the mold 50c so as to form the portion other than the portion where the core 53 is inserted. A cavity is formed for introduction.

[0093] First, the first portion 21 is formed by the molding method exemplified in the above-mentioned manufacturing method using the mold 50c. Form.

[0094] FIG. 3(B) shows a schematic cross-sectional view of the first portion 21 molded using the mold 50c. The portion 21 has an open end 24 located on a side of the first portion 21 .

[0095] Next, as shown in FIG. 3(C), a bar is inserted into the recess 23 of the first portion 21 from the opening end 24 side. 3C, the end of the battery 30 opposite to the tab 32 side is 2, an example in which the battery 30 is inserted so that the battery 30 contacts the surface of the recess 23 of the first portion 21. This shows:

[0096] Next, as shown in FIG. 3(D), the first part 21 with the battery 30 inserted therein is placed in a mold 50. Place it inside d.

[0097] The mold 50d is different from the mold 50b in the shape of a part of the upper mold 52a and the lower mold 52b, and The mold 50d has an opening 24 located at the end of the first portion 21. The side is processed so that the molding material can be introduced.

[0098] Next, using the mold 50d, the second portion 22 is formed by the molding method exemplified in the above-mentioned manufacturing method example. Form.

[0099] By using the manufacturing method exemplified here, the battery 30 and This allows the contact area with the molding material to be smaller, which makes it easier to mold the This reduces the pressure applied to the battery 30, allowing for higher production yields.

[0100] The battery module 10 manufactured by this method is shown in FIG. The battery module 10 shown in FIG. 1(E) and FIG. 2(C) has an outer shape different from that of the battery module 10 shown in FIG. The battery module 10 has the same structure, but the shape of the second portion 22 is different. They can be distinguished by the different shapes of the boundary lines (parting lines) formed on the surface. In the example shown in FIG. 3(E), the boundary line between the first portion 21 and the second portion 22 is blurred. Since it is located only at the end of the battery module 10 on the mounting side, when it is connected to an electronic device, This also has the secondary effect of making the device less visible to the user and improving the design.

[0101] The above is the explanation of the first modification.

[0102] [Variation 2] In the above configuration example, the tab 3 of the battery 30 is used as an electrode of the battery module 10. Although an example in which the protruding portion of 2 is used has been shown, other configurations may also be used.

[0103] 4A and 4B show an example in which the battery 30 has a circuit board 33. FIG. 4(A) is a perspective schematic view of the battery 30, and FIG. 4(B) is a rear view of FIG. 4(A). FIG. 1 is an enlarged perspective schematic view of the device as viewed from the front.

[0104] The battery 30 is connected to a circuit board 33 and a flexible printed circuit (FPC). The circuit board 33 overlaps with the top seal portion of the exterior body 31. They are arranged as follows.

[0105] The circuit board 33 may have, for example, a protection circuit. It has a function to stop charging when the battery 30 is overcharged, and a function to discharge when the battery 30 is over-discharged. A circuit with a function to stop power supply can be used. In this case, it is preferable that the protection circuit has a function to prevent a large current from flowing. The circuit has the function of outputting the temperature of the cells in the battery 30 and stopping the discharge or charge depending on the temperature. It may also have a function to stop the

[0106] The circuit board 33 also has a protection circuit that detects leakage from the battery 30. For example, a plurality of wires that are spaced apart and electrically insulated may be disposed in the outer casing 31. When the electrolyte touches the two wirings, an electrical short occurs. A circuit capable of detecting the phenomenon of overshooting can be used.

[0107] The circuit board 33 may be, for example, a PCB (Printed Circuit Board). ) or FPC, etc. The protection circuit, etc., is in the form of an IC chip and is mounted on the circuit board 33. It can be configured to be implemented.

[0108] The pair of tabs 32 are bent and joined to terminals of the circuit board 33. In addition, an FPC 34 is connected to the circuit board 33. The FPC 34 is The positive electrode terminal, the negative electrode terminal, and the temperature information output terminal are electrically connected to the positive electrode terminal, the negative electrode terminal, and the temperature information output terminal. The FPC 34 can be connected to a connector or the like that is provided on an electronic device.

[0109] FIG. 4C shows a perspective view of the battery module 10 having the battery 30 shown in FIG. 4A. As shown in FIG. 4(C), the battery 30 has a part of the FPC 34 that is not included in the exterior body. The second portion 22 of the second housing 20 is provided so as to protrude from the second portion 22 of the second housing 20 .

[0110] The above is the explanation of the second modification.

[0111] [Variation 3] As illustrated above, when the exterior body 20 is in the shape of a band, the battery 30 is provided. In this case, the thickness of the exterior body 20 at the portion where the wiring is inserted may be thinner than the thickness of the other portion. When a large external force is applied locally in a direction perpendicular to the surface of the exterior body 20, There is a risk that the battery 30 may be deformed or damaged. It is preferable to place a protective member inside the exterior body 20 to protect the surface.

[0112] 5A shows an example of the protective member 35. The protective member 35 is made up of two opposing plate portions 35 The plate portion 35a and the plate portion 35b are joined at the joint portion 35c. The plate portion 35a and the plate 35b are arranged parallel to each other and spaced apart from each other, and have a gap into which the battery 30 is inserted. The portions 35a and 35b are joined at one of their short sides by a joining portion 35c.

[0113] FIG. 5(B) shows the battery 30 inserted into the protective member 35. The battery 30 and the protective member 35 may or may not be fixed to each other. When the battery 30 and the protective member 35 are fixed together, the vicinity of the top seal portion of the battery 30 It is preferable that these are fixed in the vicinity of the joint 35c of the protective member. In any case, the battery 30 and the protective member 35 are disposed inside the exterior body 20 of the battery module 10. When the second portion 22 of the exterior body 20 is installed in the housing 20, the relative positions of the first and second portions 22 and 22 are fixed. This results in:

[0114] The protective member 35 may be made of a material such as metal, plastic, or wood. In particular, when the battery module 10 is used in a bent state, the plate portion 35a and the plate portion 35 It is preferable that b is thin enough to have flexibility. When used, the thickness of the protective member 35 is, for example, 0.02 mm or more and 2 mm or less, preferably The thickness should be between 0.05mm and 1mm, and more preferably between 0.1mm and 0.7mm. Typically, a metal plate having a thickness of 0.1 mm is used for the plate portions 35a and 35b. By making the thickness in this range, the user can feel comfortable wearing the device. However, if the battery module 10 is not used in a bent state, the thickness is not limited to this. The thicker the protective member 35, the stronger it is, which is preferable.

[0115] By using such a protective member 35, the battery 30 can be protected from local pressure. It is possible.

[0116] FIG. 6(A1) is a longitudinal cross section of the battery module 10 to which the protective member 35 is applied. 6(A2) is a schematic cross-sectional view of the battery module 10 in the width direction. 6(A1) and 6(A2) show the plate portion 35a and the plate portion 35b of the protection member 35. As shown in FIGS. 6(A1) and 6(A2), the battery 30 has a plate portion 35a and a plate portion 35b. b) and is provided in the exterior body 20.

[0117] FIG. 6(A3) is an enlarged view of the area surrounded by the dashed line in FIG. 6(A1). As shown in Fig. 1, the plate portions 35a and 35b have ends that are closer to the exterior body 31 of the battery 30. It is preferable that the length of the slit is large so that it is positioned outside the slit. In this way, the plate portions 35a and 35b are formed to have a width greater than the inner width of the side seal portion of the battery 30. In other words, the widthwise ends of the plate portions 35a and 35b are preferably large. It is preferable that the portion overlaps with the side seal portion of the battery 30.

[0118] When the battery module 10 is bent for use, the battery 30 and the plate portion 35a It is preferable that the plate portion 35b is not fixed to the plate portion 35a except for the vicinity of the joint portion 35c. That is, when the battery module 10 is bent, the battery 30, the plate portion 35a, and the plate It is preferable that the portions 35b are displaced and deformed independently.

[0119] FIG. 6(B1) shows the battery module 10 when it is bent so that the plate portion 35b faces inward. 6(B2) is an enlarged view of the area surrounded by the dashed line in FIG. 6(B1). do.

[0120] At this time, the neutral plane of the first portion 21 of the exterior body 20 is positioned approximately at the center of the battery 30. Therefore, the battery module 10 is bent. When the battery 30 is inserted, the relative position between the end of the battery 30 and the first portion 21 hardly changes. On the other hand, the plate portion 35a located on the outside of the bend has its end separated from the inner wall of the first portion 21. The plate portion 35b located on the inside of the bend is deformed so that its end is in contact with the first portion. It transforms to approach the inner wall of 21.

[0121] 6(C1) and 6(C2) show the state where the plate portion 35b is bent so as to face outward. At this time, the end of the plate portion 35a slides toward the inner wall of the first portion 21, The end of the portion 35b slides away from the inner wall of the first portion 21.

[0122] In this way, when the battery module 10 is not bent, the end of the plate portion 35a and By providing a gap between the end of the plate portion 35b and the first portion 21, Therefore, the end of the plate portion 35b and the first portion 21 do not come into contact with each other, and the battery module can be opened with a small force. The ruler 10 can be bent.

[0123] Here, by making the lengths of the plate portions 35a and 35b different, the battery module This can realize the function of preventing the cable 10 from being bent too much.

[0124] 7(A1) and (A2) show the battery module 10 in an extended state. 35a and the inner wall of the first portion 21 of the exterior body 20 are in contact with each other. In addition, the end of the plate portion 35b does not come into contact with the inner wall of the first portion 21. There is a gap between them.

[0125] At this time, try to bend the plate portion 35a inward as shown by the arrow in FIG. 7(A1). In this case, there is no gap for the end of the plate portion 35a to slide outward, so the plate portion 35a As a result, the plate portion 35a functions as a stopper, preventing the battery The module 10 cannot be bent.

[0126] On the other hand, when the plate portion 35a is bent outward, the end of the plate portion 35b and the first The battery module 10 can be bent due to the gap between the inner wall of the portion 21. .

[0127] 7(B1) and (B2) show cross sections when the plate portion 35b is bent inward. At this time, the end of the plate portion 35a slides away from the inner wall of the first portion 21. The end of the plate portion 35b slides toward the inner wall.

[0128] Figure 7(C1)(C2) shows the cross section when bent with an even larger curvature. At this time, when the end of the plate portion 35b comes into contact with the inner wall of the first portion 21, for the same reason as above, The plate portion 35b functions as a stopper to prevent the battery module 10 from bending any further. It will no longer be possible.

[0129] In this way, the lengths of the plate portions 35a and 35b and the shape of the space 25 of the exterior body 20 are By changing the position, the movable range of the battery module 10 can be limited.

[0130] In addition, when bending the battery module 10, the end of the plate portion 35a (or the plate portion 35b) When the battery module 10 comes into contact with the inner wall of the first portion 21, a repulsive force is generated, and the battery module 10 The force required to bend the device is greater than if there was no contact. The movable range of the battery module 10 can be notified, and the battery module 10 can be prevented from being unintentionally moved. This will prevent accidents where the cable 10 is bent too much and damaged.

[0131] If the lengths of the plate portions 35a and 35b are made equal, the plate portion 35a will be on the inside. When the battery module 10 is bent, and when the battery module 10 is bent so that the plate portion 35b faces inward, On the other hand, if the lengths of the two are different, the allowable curvature radii of the two can be made approximately equal. This allows the allowable radius of curvature to be varied depending on the bending direction.

[0132] 8(A1), (A2), and (A3) show the case 20 having a slit therein that functions as a guide. 2 shows an example in which a slit 21a, a slit 21b, and a slit 21c are provided. The grooves 21a, the slits 21b, and the slits 21c allow the plate portion 21a to bend when the exterior body 20 is bent. The shape into which the plate portion 35a and the plate portion 35b are deformed can be determined.

[0133] The end of the plate portion 35a is inserted into the slit 21a. The end of the plate portion 35a and the slit 21 are inserted into the plate portion 35b. 3 shows an example in which the plate portion 35a is longer in the longitudinal direction than the plate portion 35b so that the plate portion 35a is in contact with the inner wall of the plate portion 35a. Therefore, the battery module 10 shown in FIGS. 8(A1) and 8(A3) has the plate portion 3 This is an example of a design that prevents 5a from being bent inward.

[0134] As shown in FIGS. 8(B1) and 8(B2), the battery module is mounted so that the plate portion 35b faces inward. When the cable 10 is bent, the plate portion 35a slides along the slit 21a, and the plate portion 35b slides along the slit 21b. The slide can slide along slot 21b.

[0135] Furthermore, as shown in Figures 8(C1) and 8(C2), when the plate portion 35b is further bent, the end of the plate portion 35b becomes smooth. The battery module 10 comes into contact with the inner wall of the slit 21b and cannot be bent any further. do.

[0136] In this way, the slits 21a and 21b are formed by the slits of the plate portions 35a and 35b. The slits 21a and 21b function as guides that define the guide direction. b, the plate portion Deformation of the ends of the plate portion 35a and the plate portion 35b is suppressed, and a highly reliable battery module is obtained. It can achieve 10 joules.

[0137] Here, the lengths of the slits 21a and 21b and the lengths of the plate portions 35a and 35b are The setting can be made according to the movable range of the battery module 10. Although the lengths of the slit 21a and the slit 21b are shown to be approximately equal, The lengths may be different.

[0138] In addition, when the battery module 10 is not bent (FIG. 8(A1)), Although the configuration in which the end of the portion 35a and the inner wall of the slit 21a are in contact with each other is shown, a gap may be formed between them. By providing the battery module 10, the battery module 10 can be bent so that the plate portion 35a faces inward. This may also be configured as follows.

[0139] As shown in FIG. 8(C2), the end of the plate portion 35a is located at the innermost position (the second portion 22 side). When the plate portion 35a is slid, the end of the plate portion 35a is positioned inside the slit 21a. It is preferable to set the respective lengths of 35a and slit 21a. As shown in 3), when the end of the plate portion 35b slides to the innermost side (toward the second portion 22), When the plate portion 35b is inserted into the slit 21b, the plate portion 35b and the slit 21b are aligned so that the end of the plate portion 35b is positioned inside the slit 21b. It is preferable to set the length of each of the 1b.

[0140] Also, Fig. 8(A2) shows a schematic cross-sectional view in the width direction. The width of the battery 30 including the side seal portion is larger than the width of the battery 30. In addition, the outer casing 20 has widthwise ends of the plate portions 35a and 35b. With this configuration, the exterior body 20 is provided with a slit 21c into which the wire 21 is inserted. Therefore, the plate portions 35a and 35b are less likely to shift in the width direction. When bending the outer casing 20, the sense of unity between the outer casing 20 and the plate portions 35a and 35b is enhanced, and the user can You can get a comfortable fit without any discomfort.

[0141] The above is the explanation of the third modification.

[0142] [Configuration example 2] The following describes a battery module having a frame on which electronic devices can be mounted. An example will be described.

[0143] FIG. 9A shows the battery module 60 with the electronic device 80 attached. The battery module 60 can also be used as a mounting fixture for the electronic device 80. Therefore, the electronic device 80 and the battery module 60 may be combined into a device such as a wristwatch. The battery module 60 can be used as a terminal device. can be detached.

[0144] FIG. 9(B) shows the battery module 60 with the electronic device 80 removed, and FIG. 9(C) shows the battery module 60 with the electronic device 80 removed. ) shows an electronic device 80.

[0145] The battery module 60 has a band portion 61, a band portion 62, and a holding portion 63. The battery 30 is disposed inside the holder 61. The holder 63 is a portion for holding the electronic device 80. The holding portion 63 has a frame 70. The holding portion 63 also has an operation button 64. do.

[0146] The electronic device 80 has a housing 81. The housing 81 includes a display unit 82, a terminal 83, and a terminal 84. It has 4.

[0147] The battery module 60 is made of a band portion 61, a band portion 62, and a holding portion 63, and is made of rubber or the like. The band portion 61, the band portion 62, and the holding portion 63 are made of a straight elastic material. The holding portion 63 is a part of the frame 70. An elastic body such as rubber is formed directly to cover the frame 70. The bonding strength is increased because no adhesive is used to bond the outer casing that covers it. .

[0148] FIG. 10(A) shows the electronic device 80 as viewed from the terminal 83 and terminal 84 side. FIG. 10(B) shows the frame 70 to which the battery 30 is connected. ) is a view obtained by rotating FIG. 10(B) by 180 degrees.

[0149] The frame 70 has a frame-like shape in which the electronic device 80 is engaged. Three terminals 71 and 72 are provided on the side surface.

[0150] The electronic device 80 has a housing 81 provided with three terminals 83 and 84. Three terminals 71 provided on the inner surface of the terminal 70 are connected to the terminal 80 when the electronic device 80 is attached. Similarly, the terminal 72 is provided at a position where it contacts the terminal 84. It is located in the same place.

[0151] A case 75 is attached to the outer surface of the frame 70. The tabs 32 of the battery 30 are joined to the pair of terminals. The circuit board 33 (not shown) illustrated in the second modification is provided. The three terminals 71 are respectively connected to the positive and negative terminals of the circuit board 33 (not shown). The temperature sensor is electrically connected to a terminal for outputting temperature information.

[0152] The terminal 72 is connected to the operation button 64 provided on the holding portion 63 shown in FIG. 9(B) and the electronic device. The terminal 84 may be a physical button. When the terminal 84 is a physical button, the terminal 72 is configured as a movable member, When the operation button 64 is pressed, the terminal 84 is pressed via the terminal 72. In addition, when the terminal 84 is an electrode, the terminal 72 is an electrical switch, and the operation button is When the button 64 is pressed, an electrical signal indicating continuity or non-continuity is transmitted to the terminal 84. It is enough if you have the ability.

[0153] The frame 70 can be made of a material that can withstand molding of the exterior body. Various materials can be used, such as steel, metal, alloy, glass, wood, etc. Frame 7 0 is at least stiffer than the exterior body covering the frame 70, the band portion 61, and the band portion 62. It is preferable to use a material with high electrical conductivity.

[0154] By attaching the electronic device 80 to the battery module 60, the electronic device 8 It can be used as a main power source or an auxiliary power source for the electronic device 80. The user can easily change the battery module 60 as desired because the battery module 60 has a mountable frame 70. can be exchanged.

[0155] Although not shown, the battery module 60 has a power receiving terminal or can receive power wirelessly. It is preferable that the electronic device 80 has a power receiving mechanism such as an antenna. When the power supply has the function, the power received by the electronic device 80 is supplied to the battery 30 via the terminal 71. The battery 30 may be charged by transmitting the signal.

[0156] Next, an example of a method for manufacturing the battery module 60 will be described with reference to FIG.

[0157] First, the first portion 41a is formed by the first molding using the first mold (FIG. 11( A) The first portion 41a is a portion that will later become the band portion 61. The molding method is the same as that described above. The method can be used.

[0158] Separately, the first portion 41b is formed. The first portion 41b will be used later as a band. The first portion 41b is a portion that will become the first portion 41 using one mold. It may be formed simultaneously with a.

[0159] Since the battery 30 is not inserted into the first portion 41b, the first portion 41b is not inserted into the first portion 41b. By forming the band portion 62 and the holding portion 63 at the same time during the second molding, That's fine.

[0160] As shown in FIG. 11(A), the battery 30 is inserted into the first portion 41a. The recess 23 is formed for the first portion 41a and the second portion 41b. Preferably, the shape of the portion is formed to engage with the frame 70.

[0161] Next, the battery 30 joined to the frame 70 is inserted into the first portion 41a (see FIG. 11(B)).

[0162] Next, the first portion 41a, the first portion 41b, and the frame 70 are placed in a second mold. Then, the second portion 42 is molded by the second molding (FIG. 11(C)). is in contact with a part of the first portion 41a, a part of the first portion 41b, and a part of the frame 70. The second portion 42 is formed between the first portion 41a and the frame 70 and between the first portion 41a and the frame 70. The second portion 42 is formed so as to fill the gap between the first portion 41b and the frame 70. The first portion 41a is formed so as to fill the opening of the recess 23.

[0163] By the above method, the battery module 60 can be manufactured. The 60 is molded as a single unit with an elastic exterior body, providing both high impact resistance and excellent design. It is erected.

[0164] The above is the explanation of configuration example 2.

[0165] [Configuration example 3] When a conventional hard exterior such as metal is used, it can be easily damaged by dropping or hitting it. This is especially true for portable electronic devices. On the other hand, according to one aspect of the present invention, the exterior body including the elastic body is Therefore, it has excellent impact resistance compared to conventional battery modules. By making it a replaceable structure, the reliability of electronic devices that use battery modules can be improved. can be improved step by step.

[0166] The following describes a method for producing a battery module that can be suitably used in a portable electronic device. Explain the legal precedents.

[0167] First, the battery 30a is prepared. Here, the battery 30a is a wound type battery. The battery 30a has an exterior body 31 and a pair of tabs 32.

[0168] Next, the case 91 is joined to the tab 32 of the battery 30a (FIG. 12(A)).

[0169] 12(B) shows an exploded view of the case 91. The case 91 includes a top cover 91a The bottom cover 91b has a bottom cover 91c and a circuit board 33 therebetween. b has a terminal to be joined to the tab 32 of the battery 30a and a terminal to be connected to the circuit board 33. The circuit board 33 has three terminals 92. The top cover 91a overlaps the terminals 92. As a result, the terminals 92 of the circuit board 33 are exposed.

[0170] Next, a first portion 95 is formed by a first molding using a first mold (FIG. 12( C)) The molding method can be the same as the above-mentioned method. The first part 95 is provided with the battery 30a. A recess 94 is formed for insertion.

[0171] Next, the battery 30a is inserted into the recess 94 of the first portion 95 (FIG. 12(D)).

[0172] Next, the first part 95, the battery 30a, and the case 91 are placed in the second mold and then reassembled. The second portion 96 is formed by molding the holes (FIG. 12(E)). The second portion 96 is formed so as to fill the open end of the first portion 95. The second portion 96 is formed so as to fill the gap between the bottom of the case 91 and the case 91. The second portion 96 is preferably formed to cover the top cover 91b of the case 91. The top cover 91a may be formed to cover a part of the battery module. It functions as a part of the exterior body of the module 90.

[0173] The battery module 90 can be manufactured by the above method. The outer casing 97 of the card 90 is made of an elastic material, so it is much more shock-resistant than conventional cards. In addition, the battery module 90 has a case 91 and an exterior body 97 that are integrally molded. There are no gaps between them, so dust and water cannot get inside, resulting in high reliability. It has a sexual nature.

[0174] The above is the explanation of configuration example 3.

[0175] [Application example] The molding method of the exterior body according to one aspect of the present invention is not limited to a battery module having a battery. It can also be applied to modules that incorporate various electronic components. This makes it possible to realize a module with excellent impact resistance.

[0176] For example, the electronic component may have at least an exterior body and electrodes. The structure of the module having electronic components and the manufacturing method thereof are as follows: The configuration example and manufacturing method example of the battery can be used, and the battery can be used as an electronic component. Just replace it with.

[0177] By using the molding method for the exterior body described above, electronic components that have low resistance to pressure and high temperatures can be molded using rubber. It is possible to manufacture various modules in which the terminals are exposed and the modules are covered with an exterior body such as the above. Electronic components include IC chips with various functions, such as CPUs, FPGAs, and memories. It is also possible to use a chip or an IC chip having various sensors.

[0178] The sensors include acceleration sensors, angular velocity sensors, vibration sensors, pressure sensors, and gyroscopes. In addition, for example, body temperature, blood pressure, pulse rate, sweat rate, lung capacity, Blood glucose level, blood alcohol level, SpO2 (blood oxygen saturation), fingerprint, vein, iris, or Sensors that acquire biometric information such as voiceprints can also be applied. Position, velocity, acceleration, angular velocity, rotation speed, distance, light, liquid, magnetism, temperature, chemical substances, sound , time, hardness, electric field, current, voltage, power, radiation, flow rate, humidity, gradient, vibration, odor, Various sensors having the function of measuring infrared rays can be used.

[0179] Alternatively, if a translucent material is used for the exterior, it can be used with display devices such as LCD panels and organic EL panels. For example, a flexible display panel can be covered with a transparent rubber. It is also possible.

[0180] That is, one aspect of the present invention is a module having a first exterior body and an electronic component. The electronic component has a second exterior body and an electrode. The electrode is exposed on the surface of the second exterior body. The first exterior body includes a material that exhibits elasticity. The electronic component has a first portion, a second portion, and a space surrounded by the first portion and the second portion. is disposed in the space, and the first part and the second part are joined to each other. The component contacts the electrode and the end of the second exterior body.

[0181] In the above, it is preferable that a protective member is provided inside the first exterior body. The protective member includes a third portion covering one of two opposing surfaces of the second exterior body and a fourth portion covering the other. It is preferable that the third and fourth portions have a plate-like shape. It is preferable that the first exterior body has a first shape and be deformed in accordance with the first exterior body.

[0182] Another aspect of the present invention is a device having an electronic component and a first exterior body that covers the electronic component. The method for manufacturing a module includes the following steps: The second step is to prepare an electronic component having a first mold and an electrode. A step of forming a first portion having a recess by molding a first material. In this step, the electrode is inserted into the recess from the opening end side so that a part of the electrode protrudes outward beyond the opening end of the recess. The fourth step is to insert the electronic component into the first part. and then molding a second material using a second mold to seal the open end of the recess. and forming a second part corresponding to the first part, and forming a first exterior body in which the first part and the second part are joined together. Here, the second portion is in contact with an end portion of the second exterior body, and a part of the electrode is The second portion is formed so as to be exposed to the outside.

[0183] This embodiment may be implemented in any manner, at least in part, in accordance with other embodiments and implementations described herein. The present invention can be implemented in combination with the examples as appropriate.

[0184] (Embodiment 2) Below, a structural example of a secondary battery that can be used in one embodiment of the present invention and an example of a manufacturing method thereof will be described. In particular, the following describes an example of a bendable secondary battery. This article explains:

[0185] [Configuration example] 13 is a perspective view showing the appearance of the secondary battery 102. FIG. 14(A) shows A1- 14B is a cross-sectional view of the portion indicated by the dashed line A2. 2 is a cross-sectional view of the portion indicated by the dashed dotted line.

[0186] The secondary battery 102 according to one embodiment of the present invention is a battery covered with a separator 503 in an exterior body 507. It has a positive electrode 511, a negative electrode 515, and an electrolyte solution 504. In addition, in FIGS. One positive electrode having a positive electrode active material layer 502 on one side of a positive electrode current collector 501, and two positive electrode active material layers 502, and a negative electrode having a negative electrode active material layer 506 on one side of a negative electrode current collector 505. and one negative electrode having negative electrode active material layers 506 on both sides. The positive electrode 511 is electrically connected to a positive electrode lead 521, and the negative electrode 515 is electrically connected to a negative electrode lead The positive electrode lead 521 and the negative electrode lead 525 are electrically connected to the leads 525. Also called electrodes or lead terminals. Part of the positive electrode lead 521 and the negative electrode lead 525 The secondary battery 102 is charged and discharged through the positive electrode lead 5. 21 and negative lead 525.

[0187] Note that although the positive electrode 511 is covered with the separator 503 in FIG. 14, For example, the positive electrode 511 is not covered with the separator 503. For example, instead of the positive electrode 511, the negative electrode 515 may be covered with the separator 503. Good too.

[0188] [Positive electrode] The positive electrode 511 is composed of a positive electrode current collector 501 and a positive electrode active material layer 5 formed on the positive electrode current collector 501. 14, one side of a sheet-shaped (or strip-shaped) positive electrode current collector 501 is One positive electrode 511 having a positive electrode active material layer 502 on one side, and one positive electrode 511 having a positive electrode active material layer 502 on both sides. Although an example in which one positive electrode 511 is provided is shown, one embodiment of the present invention is not limited to this. It is also possible to use only a positive electrode 511 having a positive electrode active material layer 502 on one surface of a current collector 501. Alternatively, only the positive electrode 511 having the positive electrode active material layer 502 on both sides may be used. By using the positive electrode 511 having the layer 502, the capacity of the secondary battery 102 can be increased. The secondary battery 102 may also have three or more positive electrodes 511. By increasing the number of positive electrodes 511 that the secondary battery 102 has, the capacity of the secondary battery 102 can be increased.

[0189] The positive electrode current collector 501 is made of a metal such as stainless steel, gold, platinum, aluminum, or titanium, Materials such as these alloys that are highly conductive and do not dissolve at the potential of the positive electrode can be used. In addition, the heat resistance of silicon, titanium, neodymium, scandium, molybdenum, etc. has been improved. Aluminum alloys containing elements that react with silicon can be used. It may be formed from a metal element that forms silicide, which reacts with silicon to form silicide. The metal elements that are used include zirconium, titanium, hafnium, vanadium, niobium, and titanium. Cathode current collector 5 01: foil, plate (sheet), mesh, punched metal, expanded metal, etc. The positive electrode current collector 501 has a thickness of 5 μm or more and 30 μm or less. It is also preferable to use graphite or the like on the surface of the positive electrode current collector 501. An undercoat layer may be provided.

[0190] The positive electrode active material layer 502 contains, in addition to the positive electrode active material, a binder ( The positive electrode active material layer 502 may contain a binder, a conductive additive for increasing the conductivity of the positive electrode active material layer 502, and the like.

[0191] The positive electrode active material used for the positive electrode active material layer 502 may have an olivine type crystal structure, a layered rock salt type The positive electrode active material includes composite oxides having a crystalline structure of ZnO or a spinel type. For example, LiFeO2, LiCoO2, LiNiO2, LiMn2O4, V2O5, Compounds such as Cr2O5 and MnO2 are used.

[0192] In particular, LiCoO2 has a large capacity and is more stable in the atmosphere than LiNiO2. It is preferable because it has the advantages of being thermally stable compared to LiNiO2.

[0193] In addition, lithium-containing manganese-containing spinel-type crystal structures such as LiMn2O4 are also available. The material contains a small amount of lithium nickel oxide (LiNiO2 or LiNi 1-x M x O2(0 <x< 1) By mixing (M=Co, Al, etc.), the characteristics of the secondary battery using this can be improved. This is preferable.

[0194] Alternatively, a composite material (general formula LiMPO4 (where M is Fe(II), Mn(II), Co( One or more of Ni(II) and Ni(II) can be used. Representative examples of the general formula LiMPO4 Examples include LiFePO4, LiNiPO4, LiCoPO4, LiMnPO4, and LiF e a Ni bPO4, LiFe a Co b PO4, LiFe a 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), Li Fe c Ni d Co e PO4, LiFe c Ni d Mn e PO4, LiNi c Co d Mn e P O4 (c + d + e is less than or equal to 1, 0 < c < 1, 0 < d < 1, 0 < e < 1), LiFe f Ni g ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ i (2-j) Fe k Ni l SiO4, Li (2-j) Fe k Co l SiO4, Li (2- j) Fe k Mn l SiO4, Li (2-j) Ni k Co l SiO4, Li (2-j) Ni k Mn l SiO4 (k + l is 1 or less, 0 < k < 1, 0 < l < 1), Li (2-j) Fe m Ni n Co q SiO4, Li (2-j) Fe m Ni n Mn q SiO4, Li (2-j) N i m Co n Mn q SiO4 (m + n + q is 1 or less, 0 < m < 1, 0 < n < 1, 0 < q < 1 )、Li (2-j) [[ID=​​​​​​​​​​​​​​​​​​​​​​​​ It is represented by the general formula i2MPO4F, Li2MP2O7, Li5MO4 (M = Fe, Mn). compounds, perovskite-type fluorides such as NaFeF3 and FeF3, TiS2, MoS2 Metal chalcogenides (sulfides, selenides, tellurides), such as LiMVO4, and reverse spin Oxides with a crystalline structure of the vanadium oxide family (V2O5, V6O 13 , LiV 3O8, etc.), manganese oxide, organic sulfur compounds, and other materials can be used.

[0198] In addition, the carrier ions may be alkali metal ions other than lithium ions or alkaline earth ions. In the case of metal ions, alkali metals (e.g., sodium) are used as the positive electrode active material instead of lithium. thorium, potassium, etc.), alkaline earth metals (e.g., calcium, strontium, barium, etc.), For example, NaFeO2 or Na 2 / 3 [Fe 1 / 2 Mn 1 / 2 ]O2 as the positive electrode active material. It can be used as such.

[0199] Furthermore, a combination of two or more of the above materials may be used as the positive electrode active material. For example, A solid solution of a combination of the above materials can be used as the positive electrode active material. iCo 1 / 3 Mn 1 / 3 Ni 1 / 3 A solid solution of O2 and Li2MnO3 is used as the positive electrode active material. You can be there.

[0200] Although not shown, a conductive material such as a carbon layer may be provided on the surface of the positive electrode active material layer 502. The conductivity of the electrode can be improved by providing a conductive material such as a carbon layer. For example, the carbon layer covering the positive electrode active material layer 502 is formed by heating the positive electrode active material with glucose or the like. It can be formed by mixing carbohydrates of

[0201] The average particle size of the primary particles of the granular positive electrode active material layer 502 is 50 nm or more and 100 μm or less. It is recommended to use the following.

[0202] Conductive additives include acetylene black (AB), graphite particles, and carbon black. Nanotubes, graphene, fullerene, etc. can be used.

[0203] The conductive additive can form an electron conductive network in the positive electrode 511. The electrical auxiliary agent can maintain the electrical conduction path between the positive electrode active material layers 502. By adding a conductive additive to the electrode active material layer 502, a positive electrode active material having high electronic conductivity can be obtained. A layer 502 can be realized.

[0204] In addition to the typical polyvinylidene fluoride (PVDF), polyimide is also used as a binder. , polytetrafluoroethylene, polyvinyl chloride, ethylene propylene diene poly styrene-butadiene rubber, acrylonitrile-butadiene rubber, fluororubber, poly Polyvinyl acetate, polymethyl methacrylate, polyethylene, nitrocellulose, etc. It is possible.

[0205] The preferred range of the binder content relative to the total amount of the positive electrode active material layer 502 is The content may be appropriately set depending on the application, and is preferably set to 1 wt% or more and 10 wt% or less. For example, it can be 2 wt% or more and 8 wt% or less, or 3 wt% or more and 5 wt% or less. The content of the conductive additive relative to the total amount of the positive electrode active material layer 502 is 1 wt % or more. The content is preferably from 1 to 10 wt%, more preferably from 1 to 5 wt%.

[0206] When the positive electrode active material layer 502 is formed by the coating method, the positive electrode active material, the binder, and the conductive additive are mixed. The positive electrode paste (slurry) is prepared by mixing the agents, and is then applied onto the positive electrode current collector 501 and dried. Just do that.

[0207] [Negative electrode] The negative electrode 515 is composed of a negative electrode current collector 505 and a negative electrode active material layer 5 formed on the negative electrode current collector 505. 14, one side of a sheet-shaped (or strip-shaped) negative electrode current collector 505 One negative electrode 515 having a negative electrode active material layer 506 on one side, and one negative electrode 515 having a negative electrode active material layer 506 on both sides. Although an example in which one negative electrode 515 is provided is shown, one embodiment of the present invention is not limited to this. It is also possible to use only the negative electrode 515 having the negative electrode active material layer 506 on one surface of the electrode 505. In this case, the negative electrode current collectors 505 are arranged so that the surfaces thereof not having the negative electrode active material layers 506 are in contact with each other. This allows the formation of a contact surface with less friction, and reduces the stress when the secondary battery 102 is bent. In addition, the negative electrode having the negative electrode active material layer 506 on both sides of the negative electrode current collector 505 is preferable. Alternatively, only the negative electrode 515 may be used. This allows the capacity of the secondary battery 102 to be increased. By increasing the number of negative electrodes 515 included in the secondary battery 102, The capacity of the secondary battery 102 can be increased.

[0208] The negative electrode current collector 505 is made of metals such as stainless steel, gold, platinum, iron, copper, titanium, and the like, and It is recommended to use a material that has high conductivity and does not alloy with carrier ions such as lithium, such as an alloy of In addition, heat-resistant materials such as silicon, titanium, neodymium, scandium, and molybdenum can be used. An aluminum alloy containing an element that improves the resistance can be used. 05: foil, plate (sheet), mesh, punched metal, expanded metal, etc. The negative electrode current collector 505 has a thickness of 5 μm or more and 30 μm or less. It is also preferable to use graphite or the like on the surface of the negative electrode current collector 505. An undercoat layer may be provided.

[0209] The negative electrode active material layer 506 contains, in addition to the negative electrode active material, a binder ( The negative electrode active material layer 506 may contain a binder, a conductive additive for increasing the conductivity of the negative electrode active material layer 506, and the like.

[0210] The negative electrode active material is a material that can dissolve and deposit lithium or insert and extract lithium ions. The material of the negative electrode active material layer 506 is not particularly limited as long as it is a material. In addition to lithium phosphate, examples include carbon-based materials and alloy-based materials that are common in the field of energy storage.

[0211] Lithium metal has a low redox potential (-3.045 V vs. the standard hydrogen electrode) and is lightweight. and high specific capacity per volume (3860mAh / g and 2062mAh / cm, respectively). 3 ) and is therefore preferable.

[0212] Carbon materials include graphite, easily graphitizable carbon (soft carbon), and non-graphitizable carbon (hard carbon). carbon nanotubes, graphene, carbon black, etc. .

[0213] As graphite, mesocarbon microbeads (MCMB), coke-based artificial graphite, Examples of the graphite include artificial graphite such as titanium-based artificial graphite, and natural graphite such as spheroidized natural graphite.

[0214] When lithium ions are inserted between the layers of graphite (the formation of lithium-graphite intercalation compounds), Sometimes), it shows a potential as low as that of lithium metal (0.1 to 0.3 V vs. Li / L i + This allows lithium-ion batteries to exhibit high operating voltages. Graphite has a relatively high capacity per unit volume, small volume expansion, is inexpensive, and is a lithium It is preferable because it has advantages such as higher safety compared to metals.

[0215] As a negative electrode active material, it can carry out charge-discharge reactions by alloying and dealloying reactions with lithium. Possible alloy materials or oxides can also be used. In this case, examples of alloy materials include Mg, Ca, Al, Si, Ge, Sn, and Pb. , Sb, Bi, Ag, Au, Zn, Cd, Hg, In, etc. These elements have a large capacity compared to carbon, and silicon in particular has a theoretical capacity The capacity is dramatically high at 4200mAh / g. Therefore, using silicon as the negative electrode active material As alloy materials using such elements, for example, Mg2Si, Mg2 Ge, Mg2Sn, SnS2, V2Sn3, FeSn2, CoSn2, Ni3Sn2, C u6Sn5, Ag3Sn, Ag3Sb, Ni2MnSb, CeSb3, LaSn3, La 3Co2Sn7, CoSb3, InSb, SbSn, etc.

[0216] In addition, the negative electrode active material is SiO, SnO, SnO2, titanium oxide (TiO2), lithium Sodium titanium oxide (Li4Ti5O 12 ), lithium-graphite intercalation compound (Li x C6), Niobium oxide (Nb2O5), tungsten oxide (WO2), molybdenum oxide (MoO2) The oxides may be used.

[0217] In addition, the negative electrode active material is a composite nitride of lithium and transition metals, which has a Li3N structure. つLi 3-x M x N (M=Co, Ni, Cu) can be used. For example, Li 2. 6Co 0.4 N3 has a large charge / discharge capacity (900mAh / g, 1890mAh / cm 3 )of This is preferable.

[0218] When a composite nitride of lithium and transition metals is used, lithium ions are included in the negative electrode active material, As a positive electrode active material, materials that do not contain lithium ions, such as V2O5 and Cr3O8, are used. In addition, when a material containing lithium ions is used as the positive electrode active material, However, by first removing the lithium ions contained in the positive electrode active material, As the substrate, a complex nitride of lithium and a transition metal can be used.

[0219] In addition, a material that undergoes a conversion reaction can also be used as the negative electrode active material. For example, lithium oxides such as cobalt oxide (CoO), nickel oxide (NiO), and iron oxide (FeO) A transition metal oxide that does not undergo an alloying reaction with the metal may be used as the negative electrode active material. Further materials that can react include Fe2O3, CuO, Cu2O, RuO2, Cr2 Oxides such as O3, CoS 0.89 , sulfides such as NiS and CuS, Zn3N2, Cu3N, Nitrides such as Ge3N4, phosphides such as NiP2, FeP2, CoP3, FeF3, BiF This also occurs with fluorides such as 3. Note that the potential of the above fluorides is high, so they are not used as positive electrode active materials. It's fine.

[0220] When the negative electrode active material layer 506 is formed by a coating method, the negative electrode active material and the binder are mixed. A negative electrode paste (slurry) is prepared, applied onto the negative electrode current collector 505, and dried. A conductive additive may be added to the negative electrode paste.

[0221] Graphene may be formed on the surface of the negative electrode active material layer 506. When the material is silicon, the charge-discharge cycle causes the charge-discharge cycle to Since the change in area is large, the adhesion between the negative electrode current collector 505 and the negative electrode active material layer 506 decreases, and the charging The battery characteristics deteriorate due to discharge. When graphene is formed on the surface, the volume of silicon changes during the charge / discharge cycle. Even if the negative electrode current collector 505 and the negative electrode active material layer 506 are not adhered to each other, a decrease in the adhesion between the negative electrode current collector 505 and the negative electrode active material layer 506 can be suppressed. This is preferable because it reduces the deterioration of the battery characteristics.

[0222] In addition, a coating of oxide or the like may be formed on the surface of the negative electrode active material layer 506. The coating formed by the decomposition of the electrolyte releases the amount of charge consumed during its formation. In contrast, a film of oxide or the like is formed on the negative electrode active material in advance, and irreversible capacity is formed. By providing the electrode on the surface of the porous layer 506, it is possible to suppress or prevent the occurrence of irreversible capacitance. do.

[0223] The coating that coats the negative electrode active material layer 506 may contain niobium, titanium, vanadium, tantalum, or the like. Ta, tungsten, zirconium, molybdenum, hafnium, chromium, aluminum or silicon oxide film, or a film containing one of these elements and lithium Such a coating is not susceptible to damage caused by the decomposition products of conventional electrolytes. This film is sufficiently dense compared to the coating formed on the outermost surface.

[0224] For example, niobium oxide (Nb2O5) has an electrical conductivity of 10 -9 Low S / cm and high Therefore, the niobium oxide film prevents the electrochemical decomposition reaction between the negative electrode active material and the electrolyte. On the other hand, the lithium diffusion coefficient of niobium oxide is 10 -9 cm 2 / sec, and high It has high lithium ion conductivity, which allows lithium ions to pass through. Silicon oxide or aluminum oxide may also be used.

[0225] The film that covers the negative electrode active material layer 506 can be formed by, for example, a sol-gel method. The sol-gel method is a method in which a solution of metal alkoxides or metal salts is subjected to a hydrolysis reaction. This method involves forming a gel that has lost its fluidity through a polycondensation reaction, and then baking this gel to form a thin film. The sol-gel method is a method for forming thin films from a liquid phase, so the raw materials must be homogenized at the molecular level. Therefore, the raw material of the metal oxide film at the solvent stage can be mixed with a negative electrode active material such as graphite. By adding a binder, the active material can be easily dispersed in the gel. A coating can be formed on the surface of the negative electrode active material layer 506. By using the coating, This can prevent a decrease in the capacity of the battery.

[0226] [Separator] The separator 503 may be made of a material such as cellulose or polypropylene (PP ), polyethylene (PE), polybutene, nylon, polyester, polysulfone, poly Acrylonitrile, polyvinylidene fluoride, tetrafluoroethylene, polyphenylene sulfide Porous insulators such as polyethylene terephthalate (PE) can be used. Nonwoven fabrics such as glass fiber and gas A membrane made of a composite of lath fiber and polymer fiber may also be used.

[0227] [Electrolyte] The electrolytic solution 504 is an electrolyte in which carrier ions can move and A material containing lithium ions is used. Typical examples of electrolytes include LiPF6, LiClO4, LiAsF6, LiBF4, LiCF3SO3, Li(CF3SO2)2 N, Li(C2F5SO2)2N, Li(SO2F)2N, etc. The electrolytes may be used alone or in any combination and ratio of two or more. Good too.

[0228] In particular, when high-temperature processing is performed during molding of rubber, etc., the electrolyte must have high heat resistance. For example, it is preferable to use an imide salt having a high thermal decomposition temperature.

[0229] The solvent of the electrolytic solution 504 is a material in which carrier ions can move. The solvent for the liquid is preferably an aprotic organic solvent. Typical examples of the aprotic organic solvent are: Examples include ethylene carbonate (EC), propylene carbonate (PC), and dimethyl carbonate. Carbonate, diethyl carbonate (DEC), ethyl methyl carbonate (EMC), γ-butyrolactone, acetonitrile, dimethoxyethane, tetrahydrofuran, etc. One or more of these can be used. Also, a gelled electrolyte can be used as a solvent for the electrolyte. By using a polymer material that can be easily dissolved, or by adding a polymer material to the electrolyte for gelation, This improves safety against liquids, etc. It also makes it possible to make secondary batteries thinner and lighter. Typical examples of polymeric materials that can be cured include silicone gel, acrylic gel, and acrylonitrile. Polyethylene oxide gel, Polypropylene oxide gel, Fluorine-based poly In addition, flame-retardant and non-volatile ionic liquids are used as solvents for electrolytes. By using one or more of these materials (room-temperature molten salts), the secondary battery can be prevented from internal short circuits and overcharging. This prevents the secondary battery from exploding or catching fire even if the internal temperature rises. Ionic liquids are salts in a fluid state and have high ion mobility (conductivity). contains a cation and an anion. The ionic liquid is ethylmethylimidazolium ( ionic liquids containing the cation N-methyl-N-propylpiperidinium (EMI) PP 13 ) cation-containing ionic liquids.

[0230] In particular, when high-temperature processing is performed during molding of rubber, etc., the solvent of the electrolyte is a material with a high boiling point. For example, it is preferable to use propylene carbonate (PC). I wish.

[0231] [Exterior body] There are various types of secondary battery structures, but in this embodiment, the shape of the exterior body 507 is The film used to form the exterior body 507 is a metal film ( Aluminum, stainless steel, nickel steel, etc.), plastic film made from organic materials , hybrids containing organic materials (such as organic resins and fibers) and inorganic materials (such as ceramics) Material films, carbon-containing inorganic films (carbon films, graphite films, etc.) A single layer film selected from the above or a laminated film made up of a plurality of these is used. The rubber is easy to emboss, and when recesses or protrusions are formed by embossing, the outer Since the surface area of ​​the exterior body 507 that comes into contact with the air increases, the heat dissipation effect is excellent.

[0232] In addition, when the shape of the secondary battery 102 is changed by applying an external force, the shape of the secondary battery 102 When external bending stress is applied to the exterior body 507, a part of the exterior body 507 is deformed or broken. By forming a recess or a protrusion on the exterior body 507, Therefore, the strain caused by the stress applied to the secondary battery 10 can be alleviated. This can improve the reliability of 2. Note that strain is the change in the length of an object relative to its reference length (initial state). It is a measure of deformation that indicates the displacement of a material point in an object. By doing so, the effects of strain caused by applying external force to the secondary battery are kept within an acceptable range. Therefore, a highly reliable secondary battery can be provided.

[0233] The above is a description of the configuration example.

[0234] [Example of manufacturing method] An example of a method for manufacturing the secondary battery 102 will be described below.

[0235] [Prepare the positive electrode and cover it with a separator] First, a positive electrode 511 having a positive electrode active material layer 502 formed thereon is placed on a separator 503 ( See Figure 15(A). In Figure 15(A), the slits are formed to create a meandering shape. 5 shows an example in which the positive electrode current collector 501 has positive electrode active material layers 502 on both sides.

[0236] By forming a slit in the positive electrode current collector 501, when the secondary battery 102 is bent, It is possible to prevent the positions of the ends of multiple current collectors from shifting. This allows the tension applied to the current collector to be reduced.

[0237] In addition, when the negative electrode 515 is superimposed on the negative electrode 515 as shown in FIG. 15(C) in a later step, The positive electrode active material layer 502 is not provided in the region 511a overlapping with the slit. When the positive electrode active material layer 502 is provided in the region 511a overlapping with the slit, the positive electrode active material layer 50 2, the negative electrode active material layer 506 is not present in the area where it overlaps with the negative electrode active material layer 506, and this causes problems during the battery reaction. Specifically, carrier ions coming out of the positive electrode active material layer 502 may be trapped in the slit. The carrier ions are concentrated in the negative electrode active material layer 506, which is the closest to the negative electrode active material layer 506. Therefore, the positive electrode active material is placed in the area 511a that overlaps with the slit of the negative electrode 515. By not providing the negative electrode active material layer 502, the deposition of carrier ions into the negative electrode active material layer 506 is suppressed. It is possible.

[0238] Next, the separator 503 is folded along the dotted line in FIG. 15(A), and the separator 50 3 sandwiches the positive electrode 511. Next, the outer peripheral portion of the separator 503 on the outside of the positive electrode 511 is joined. The separator 503 is formed in a pouch shape (see FIG. 15(B)). The outer periphery may be joined using an adhesive, ultrasonic welding, or heat fusion. It may also be carried out by

[0239] In this embodiment, polypropylene is used as separator 503, and separator 50 The outer periphery of the 3 is bonded by heating. The bonded portion 503a is shown in FIG. 15(B). The positive electrode 511 can be covered with a separator 503. The separator 503 is a positive electrode active material. It is only necessary to form the layer so as to cover the substance layer 502 , and it is not necessary to cover the entire positive electrode 511 .

[0240] In addition, in FIGS. 15(A) and (B), the separator 503 is folded. The embodiment is not limited to this. For example, the positive electrode 511 is sandwiched between two separators. In this case, the joint portion 503a may be formed so as to surround most of the four sides.

[0241] The outer periphery of the separator 503 may be joined intermittently or at regular intervals. The bonding may be in the form of dots.

[0242] Alternatively, joining may be performed on only one side of the outer periphery. Alternatively, joining may be performed on only two sides of the outer periphery. Alternatively, joining may be performed on the four sides of the outer periphery. All four sides can be made even.

[0243] In addition, in FIGS. 15(A) and 15(B), the positive electrode 511 is covered with the separator 503. However, one embodiment of the present invention is not limited to this case. 1 may not be covered with the separator 503. For example, instead of the positive electrode 511, The pole 515 may be covered by a separator 503 .

[0244] [Prepare the negative electrode] Next, a negative electrode 515 is prepared (see FIG. 15(C)). In FIG. 15(C), a slit is formed. The negative electrode current collector 505 has a meandering shape formed by forming a negative electrode active material layer 506 on both sides. Here is an example:

[0245] By forming a slit in the negative electrode current collector 505, when the secondary battery 102 is bent, It is possible to prevent the positions of the ends of multiple current collectors from shifting. This allows the tension applied to the current collector to be reduced.

[0246] [Put the positive and negative electrodes together and connect the leads] Next, the positive electrode 511 and the negative electrode 515 are stacked (see FIG. 16(A)). In this embodiment, an example is shown in which two positive electrodes 511 and two negative electrodes 515 are used.

[0247] Next, the positive electrode tabs of the plurality of positive electrode current collectors 501 and the positive electrode lead 521 having the sealing layer 520 are The electrical connection is made by applying pressure and irradiating ultrasonic waves (ultrasonic welding). Welding by a laser may also be performed.

[0248] In addition, the lead electrodes are subject to stress caused by external force applied after the secondary battery 102 is manufactured. It is prone to cracks and breaks.

[0249] Therefore, when the positive electrode lead 521 is ultrasonically welded, a connection area and a curved portion are formed on the positive electrode tab. (FIG. 16(B)).

[0250] By providing this curved portion, it is possible to prevent the secondary battery 102 from being subjected to external force after fabrication. Therefore, the reliability of the secondary battery 102 can be improved. do.

[0251] Furthermore, the positive electrode tab is not limited to being curved, and the material of the positive electrode current collector may be stainless steel. The thickness of the positive electrode current collector is set to 10 μm or less, which makes it easy to fabricate a secondary battery. The structure may be such that stress caused by external force being applied from the outside after manufacturing can be easily alleviated.

[0252] Of course, it goes without saying that a combination of these may be used to alleviate stress concentration on the positive electrode tab. None.

[0253] Similarly to the positive electrode current collector 501, the negative electrode tab of the negative electrode current collector 505 and the sealing layer 520 are The negative electrode lead 525 is electrically connected by ultrasonic welding.

[0254] [Prepare an outer casing to cover the positive and negative electrodes] The film used for the exterior is folded and the overlapping side is joined by thermocompression. In (B), the portion where one side of the exterior body 507 is joined by thermocompression is shown as a joint 507a. The positive electrode 511 and the negative electrode 515 are covered with this exterior body 507 .

[0255] [Inject the electrolyte] Next, the sealing layer 520 of the positive electrode lead 521 and the sealing layer 525 of the negative electrode lead 525 are The side of the exterior body 507 that overlaps with 520 is similarly heat-sealed (FIG. 17(A)). The electrolyte 504 is poured from the unsealed side 507b of the exterior body 507 shown in FIG. 17(A). It is placed in an area covered with the exterior body 507.

[0256] Then, the remaining side of the outer casing 507 (side 507 b) is sealed to obtain the secondary battery 102 (FIG. 17(B)). In an environment where impurities such as oxygen, moisture, and nitrogen are eliminated, such as by using a glove box, It is recommended to use a vacuum sealer, injection sealer, etc. to draw a vacuum. By sandwiching the material between two heatable bars, it is possible to apply heat and pressure. The conditions are, for example, a vacuum of 40 kPa, heating at 190°C, and pressure at 0.1 MPa. At this time, the part where the positive and negative electrodes of the exterior body 507 are located can be The side 507b may be sealed while applying pressure. It can be removed from between the electrode and the negative electrode.

[0257] [Modification] As a modification of the secondary battery 102, a secondary battery 102 is shown in FIG. 18(A). The secondary battery 102 shown in FIG. 16 has a positive electrode lead 521 and a negative electrode lead 16. Specifically, the secondary battery 102 of FIG. The negative electrode lead 525 and the negative electrode lead 526 are arranged on the same side of the exterior body 507. In 02, the positive electrode lead 521 and the negative electrode lead 525 are attached to different sides of the outer casing 507. In this way, the secondary battery according to one embodiment of the present invention allows the lead electrodes to be freely arranged. Therefore, the degree of design freedom is high. In addition, the manufacturing method of a product using a secondary battery of one embodiment of the present invention can be improved. Productivity can be increased.

[0258] FIG. 18(B) is a diagram illustrating the manufacturing process of the secondary battery 102 of FIG. 18B, the manufacturing method of the secondary battery 102 in FIG. 13 can be referred to. The electrolyte 504 is omitted.

[0259] In addition, in order to make the surface of the film used for the exterior body 507 uneven in advance, press processing, e.g. For example, embossing may be performed. By providing the film surface with irregularities, it is possible to improve the properties of the film as a secondary battery. Flexibility and stress relief are improved. Embossing improves the film surface (or The recessed or protruding portions formed on the back surface of the film are the volume of the space that makes the film a part of the wall of the sealing structure. This closed space is formed by the concave or convex parts of the film forming a bellows structure. It can be said that it is formed as a bellows structure. Any method that can form a relief on a part of a film may be used, regardless of the method.

[0260] Note that one embodiment of the present invention is not limited to these. Since various inventive aspects have been described, it is understood that one aspect of the present invention is not limited to any particular aspect. For example, as one embodiment of the present invention, an example in which the present invention is applied to a lithium ion secondary battery is shown below. One aspect of the present invention is to provide a battery that can be used in a variety of secondary batteries, lead-acid batteries, lithium batteries, etc. nickel-ion polymer secondary battery, nickel-metal hydride battery, nickel-cadmium battery, Nickel-iron batteries, nickel-zinc batteries, silver-oxide-zinc batteries, solid-state batteries, air batteries, The present invention may be applied to secondary batteries, capacitors, lithium ion capacitors, etc. The above embodiment does not necessarily have to be applied to lithium ion secondary batteries.

[0261] The above is an explanation of an example of the manufacturing method.

[0262] This embodiment may be combined, at least in part, with other embodiments described in this specification. It can be implemented in combination.

[0263] (Embodiment 3) In this embodiment, an example of the configuration of a battery suitable for applications in which repeated bending and stretching is performed will be described. do.

[0264] FIG. 19(A) shows a schematic top view of the battery 200. FIG. 19(B) shows the top view of the battery 200. 19(C) shows a schematic diagram of the battery 200 as viewed from the direction of the dashed arrow in FIG. 19(A) shows a schematic cross-sectional view taken along the cutting line A1-A2 in FIG.

[0265] The battery 200 includes an exterior body 201, a laminate 202 housed inside the exterior body 201, and a stack and a tab 203 that is electrically connected to the layer 202 and extends outside the outer casing 201 . In addition to the laminate 202, an electrolyte solution is enclosed inside the exterior body 201.

[0266] The exterior body 201 has a film-like shape and is folded in two so as to sandwich the laminated body 202. The exterior body 201 includes a bent portion 211, a pair of joint portions 213, and a joint portion 21 The pair of joints 213 can also be called side seal parts. The joint 214 is located on the tab 203 side and can also be called a top seal portion.

[0267] The exterior body 201 has ridge lines 221 and valley lines 222 arranged alternately in the portion overlapping with the laminate 202. It is preferable that the joint portion 213 of the exterior body 201 and the joint portion 21 4 is preferably flat.

[0268] The laminate 202 has a configuration in which electrodes 231 and electrodes 232 are alternately laminated. The electrode 231 functions as either a positive electrode or a negative electrode, and the electrode 232 functions as the other. Although not shown, a separator may be provided between the electrode 231 and the electrode 232 .

[0269] As shown in FIG. 19(C), the outer casing 201 and the laminate 202 are bent at the bent portion 211. It is preferable to have a space 225 between them.

[0270] FIG. 19(D) shows a schematic cross-sectional view of the battery 200 when bent. In D), some of the configuration is shown in a simplified form.

[0271] When the battery 200 is bent, the part of the exterior body 201 located on the outside of the bend stretches, and the part located on the inside More specifically, the other part located on the outside of the bend of the exterior body 201 is deformed so as to shrink. The part that is affected by the deformation is such that the amplitude of the wave is small and the period of the wave is large. The part of the body 201 located inside the bend has a large wave amplitude and a small wave period. As a result of the deformation of the exterior body 201, the exterior body 2 Since the stress on the exterior body 201 is reduced, the exterior body 201 itself does not need to expand or contract. As a result, the battery 200 can be bent with a small force without damaging the exterior body 201. can.

[0272] Furthermore, as shown in FIG. 19(D), the electrodes 231 and 232 are displaced relative to each other. At this time, the laminate 202 deforms in such a manner that the plurality of electrodes 231 of the laminate 202 The electrodes 232 are fixed on the joint 214 side, so that they are not close to the bent portion 211. As the distance between the layers increases, the amount of deviation increases. This relieves the stress, and the electrodes 231 and 232 themselves do not need to expand or contract. As a result, the battery 200 can be bent without the laminate 202 being damaged.

[0273] When a solid electrolyte or a gel electrolyte is used, the entire laminate 202 is covered with the electrolyte. As a result, the electrodes 231 and 232 are less likely to be displaced relative to each other, and stress relaxation cannot be expected. Therefore, a laminate in which an electrolyte layer is provided between a pair of electrodes 231 and 232 in advance is It is preferable to prepare a plurality of laminates and stack them. Even when a gel electrolyte is used, the electrodes 231 and 232 are displaced relative to each other. It is possible.

[0274] Furthermore, by providing a space 225 between the laminate 202 and the exterior body 201, the neutral plane The electrodes 231 and 232 located inside the They can be displaced relatively.

[0275] The battery exemplified in this embodiment is free from damage to the exterior body and lamination even when repeatedly bent and stretched. This battery is less likely to be damaged and its characteristics are less likely to deteriorate.

[0276] This embodiment may be combined, at least in part, with other embodiments described in this specification. It can be implemented in combination. [Example]

[0277] In the following, a battery module was manufactured using a manufacturing method according to one embodiment of the present invention. In this case, the method exemplified in the first modification of the first embodiment (see FIG. 3) was used.

[0278] First, a lithium ion secondary battery was prepared. The lithium ion secondary battery was made of a positive electrode active material and LiCoO2 was used as the negative electrode active material, graphite was used as the negative electrode active material, and the exterior was embossed. An aluminum laminate film was used. Aluminum foil was used as the positive electrode current collector, and a positive electrode was attached to one side. A copper foil was used as the negative electrode current collector, and a negative electrode active material layer was coated on one side of the negative electrode current collector. Two current collectors are placed so that the surfaces opposite to the coated surfaces are in contact with each other, and then they are placed on a cellulose separator. The cellulose separator was sandwiched between two paper sheets and molded into a bag shape. Polypropylene was sandwiched between the overlapping parts and heat-pressed. The coated surface of the positive electrode current collector and the negative electrode current collector were placed in contact with each other. Six positive and six negative current collectors were placed in a row so that the coated surfaces of the positive and negative current collectors faced each other. The electrode laminate was sandwiched between aluminum laminate films. The film was folded in two and three sides were joined. The side seal was fitted with a flat heat bar, and the top seal was fitted with a flat heat bar. The heat bars used for the rollers each had a recessed surface that overlapped with the tab.

[0279] The exterior is made of polypropylene, aluminum foil, and nylon laminated in that order, with a thickness of approximately A 50 μm aluminum laminate film was used. The embossing was performed to create a wave shape with a 2 mm pitch and a 0.5 mm height difference between the convex and concave portions. A modified film was used.

[0280] First, the first molding is performed to create a rubber mold with a recess into which a lithium-ion secondary battery can be inserted. The first molding was done using a millable type fluorine rubber as the molding material. The molding was carried out with a pressure cylinder diameter of 260 mm, a temperature of 170°C, and a pressure of 200 kgf. / cm 2 The test was carried out for 10 minutes under the conditions.

[0281] Next, insert the lithium-ion secondary battery into the recess of the molded rubber body (first part). did.

[0282] Next, the rubber molded body and the lithium-ion secondary battery are placed in a mold (second mold) and the second The second part was formed by molding. The same material as that used for the first molding was used. The second molding was performed with a pressure cylinder diameter of 260 mm, a temperature of 160°C, and a pressure of 30 kJ. gf / cm 2 The test was carried out for 10 minutes under the conditions.

[0283] Through the above steps, a battery module having a lithium ion secondary battery inside a rubber molded body is produced. I got the ru.

[0284] In one aspect of the present invention, the exterior body is molded in two separate steps, and the temperature and pressure are controlled in the first molding step. Therefore, the degree of freedom in molding conditions for the first portion that forms the main part of the exterior body is increased. As a result, the product has a good appearance and high strength. In the second molding, the exterior body is formed only near the top seal of the secondary battery. Since the second portion can be formed by the above-mentioned molding method, the molding pressure can be relatively high. , it is possible to prevent poor bonding and the like.

[0285] Figure 20(A) shows a photograph of the battery module. Joules can be easily bent with little force.

[0286] FIG. 20(B) shows a state in which a part of the exterior body is cut away to expose the secondary battery. In this way, it was confirmed that the exterior body of the secondary battery was not crushed and maintained its shape. .

[0287] The above is the description of this embodiment.

[0288] This embodiment can be implemented in appropriate combination with other embodiments described in this specification. can. [Explanation of symbols]

[0289] 10 Battery Module 20 Exterior body 21 First Part 21a Slit 21b Slit 21c slit 22 Second Part 23 Recess 24 Open end 25 Space 26a hole 26b hole 30 Battery 30a battery 31 Exterior body 32 tabs 33 Circuit Board 34 FPC 35 Protective materials 35a plate part 35b plate part 35c joint 41a First Part 41b First Part 42 Second Part Type 50a 50b type 50c type 50d type 51a upper mold 51b Lower mold 52a upper mold 52b Lower mold 53 Core 54a Core 54b Core 55a injection hole 55b Injection hole 60 Battery Module 61 Band Club 62 Band Club 63 Holding part 64 Operation buttons 70 frames 71 terminals 72 terminals 75 cases 80 Electronic equipment 81 Case 82 Display section 83 terminals 84 terminals 90 Battery Module 91 cases 91a Top cover 91b Bottom cover 92 terminals 94 recess 95 First Part 96 Second Part 97 Exterior body 102 Secondary battery 200 batteries 201 Exterior body 202 Laminate 203 tabs 211 Bending part 213 Joint 214 Joint 221 Ridgeline Route 222 Valley Line 225 Space 231 Electrode 232 Electrode 501 Positive electrode current collector 502 Positive electrode active material layer 503 Separator 503a joint 504 Electrolyte 505 Negative electrode current collector 506 Negative electrode active material layer 507 Exterior body 507a Joint Around 507b 511 Positive electrode 511a area 515 negative electrode 520 Sealing layer 521 Positive lead 525 Negative lead

Claims

1. The device has a band portion, a battery housed in the band portion, a holding portion connected to the band portion, and an electronic device held in the holding portion, the band portion and the holding portion each include an elastic material; The wristwatch-type terminal device, wherein the band portion has a portion for accommodating the battery, a first slit, and a second slit.

2. The device has a band portion, a battery housed in the band portion, a holding portion connected to the band portion, and an electronic device held in the holding portion, the band portion and the holding portion each include an elastic material; the band portion has a portion for accommodating the battery, a first slit, and a second slit; the holding portion has an operation button, The terminal of the electronic device is a wristwatch-type terminal device that is connected to the operation button.

Images