JP2012023220A - Electronic component, electronic apparatus, and method of manufacturing electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin electrochemical cell excellent in performance at a low cost.SOLUTION: An electric double layer capacitor 1 has a package in which a bottom plate 8 formed of a resin sheet material, a frame 4, an upper surface plate 5, and a sealing plate 6 are laminated, and a cavity 15 is formed. Electrodes 3a, 3b formed on the surface of metal plates 2a, 2b together with an electrolyte are enclosed in the cavity 15 face to face with a prescribed distance kept between. The metal plates 2a, 2b pass through the cavity 15 and reach the outside of the package to form connection terminals for surface mounting. The electrodes 3a, 3b and the through portion of the metal plates 2a, 2b are formed flush with each other, and the electric double layer capacitor 1 can be thereby thinned. Since a metal plate coated with an electrode active material is stamped by press working to form the electrodes 3a, 3b, labor to install the electrodes on a collector is saved, and the distance between the electrodes can be accurately set.

Description

  The present invention relates to an electronic component, an electronic device, and an electronic component manufacturing method, and relates to an electrochemical cell such as an electric double layer capacitor.

An electric double layer capacitor is a device that stores electricity by polarizing ions in an electrolyte and supplies electric power by discharging the ions.
With this storage / discharge function, the electric double layer capacitor is used, for example, for a clock function of an electronic device, a backup power source such as a semiconductor memory, and a standby power source of an electronic device such as a microcomputer or an IC memory.

In particular, an electric double layer capacitor capable of surface mounting can be reduced in size and thickness, and thus is suitable for a thin portable terminal or the like.
In order to meet such a demand for downsizing and thinning, the following Patent Document 1 discloses an electric double layer capacitor in which a polarization electrode and an electrolyte are housed in a container having a recess and the opening is sealed with a sealing plate. Proposed.

By the way, conventionally, the current collector and the electrode are separately manufactured, and there is a possibility that the number of steps is large and the defect rate is increased.
In addition, due to the influence of mechanical accuracy, the distance between the electrodes tends to increase when the electrodes are arranged, which tends to increase the internal resistance of the finished product.
There has been a problem of how to solve the above problem while responding to the demand for reduction in thickness and cost of the electric double layer capacitor.

JP 2001-216852 A

  An object of the present invention is to provide a thin electrochemical cell having excellent performance at a low cost.

In the first aspect of the present invention, the container is formed using a container having a hollow portion sealed inside and a metal plate coated with an electrode active material on the surface, and is opposed to each other with a predetermined distance in the hollow portion. A pair of electrodes, a pair of conductors integrally formed with each of the metal plates of the electrodes and penetrating to the outside of the container in the same plane, and an electrolyte in contact with the pair of electrodes are provided. Provide electronic parts.
According to a second aspect of the present invention, the facing portion of the electrode is formed in a concavo-convex shape, and the convex portion of one electrode faces the concave portion of the other electrode. Provide electronic parts.
The invention according to claim 3 is characterized in that the electrode active material is formed on one surface of the metal plate, and the other surface of the metal plate is held at the bottom of the cavity. The electronic component of Claim 1 or Claim 2 is provided.
According to a fourth aspect of the present invention, in the electronic component according to the second aspect, the base portion of the convex portion is twisted so that the surface on which the electrode active material is formed faces the electrode. provide.
The invention according to claim 5 is characterized in that the container is formed by laminating resin sheet materials, according to any one of claims 1 to 4. Provide electronic parts.
The invention according to claim 6 provides the electronic component according to claim 5, wherein an opening corresponding to the cavity is formed in the sheet material forming the cavity.
According to a seventh aspect of the present invention, the electronic component according to any one of the first to sixth aspects, a power storage means for storing power in the electronic component, and a function that performs a predetermined function There is provided an electronic apparatus comprising: the electronic component; and power supply means for supplying power to the other electronic component using the stored electric charge.
In the invention according to claim 8, an electrode active material forming step of applying an electrode active material to the surface of the central part of the metal plate formed in a band shape, and a part of the metal plate of the portion where the electrode active material is formed An electrode forming step of forming a plurality of opposing pairs of electrodes along the band shape, and an encapsulation step of enclosing each of the formed pair of electrodes together with an electrolyte in a cavity of a container, There is provided a method for producing an electronic component, comprising: a separation step of separating the individual containers by cutting the metal plate.
In the invention according to claim 9, in the enclosing step, a resin sheet is provided on the front and back surfaces of the metal plate so that an end portion of the metal plate on which the electrode is not formed penetrates to the outside of the container. The method of manufacturing an electronic component according to claim 8, wherein the container is formed by laminating layers.

  According to the present invention, a thin electrochemical cell having excellent performance can be provided at low cost by forming an electrode by applying an electrode active material to a metal plate.

It is a figure for demonstrating the structure of an electrical double layer capacitor. It is a figure for demonstrating the manufacturing method of an electrical double layer capacitor. It is a figure for demonstrating the manufacturing method of an electrical double layer capacitor. It is a figure for demonstrating the manufacturing method of an electrical double layer capacitor. It is a figure for demonstrating the manufacturing method of an electrical double layer capacitor. It is a figure for demonstrating the modification of an electrical double layer capacitor. It is a figure for demonstrating the modification of the shape of an electrode. It is a figure for demonstrating the example by a lead frame.

(1) Outline of Embodiment An electric double layer capacitor 1 (FIG. 1) includes a bottom plate 8, a frame 4, a top plate 5, and a sealing plate 6 made of a resin sheet material, and a hollow portion 15 inside. In the cavity 15, electrodes 3 a and 3 b formed on the surfaces of the metal plates 2 a and 2 b face each other with a predetermined distance and are sealed together with an electrolyte. The metal plates 2a and 2b penetrate the hollow portion 15 to reach the outside of the package, and are bent toward the bottom plate 8 to form connection terminals for surface mounting.
Since the penetration portions of the electrodes 3a and 3b and the metal plates 2a and 2b are formed on the same plane, the electric double layer capacitor 1 can be thinned.
In addition, as will be described below, the electrodes 3a and 3b are formed by stamping a metal plate coated with an electrode active material, so that it is possible to save the trouble of separately installing the electrodes on the current collector and between the electrodes. The distance can be set accurately.
Furthermore, since the bottom plate 8 and the sealing plate 6 use high strength FRP (fiber reinforced plastic), the strength of the package can be secured.

The electric double layer capacitor 1 is manufactured as follows.
First, both ends of a hoop material (FIG. 2A) to be the metal plate 2 are plated for connection terminals (FIG. 2B), and an electrode active material is applied to the center of the hoop material to form an electrode 3. (FIG. 2C).
Next, the hoop material is punched out by pressing to create a plurality of sets of electrodes 3a and 3b at the same time (FIG. 2D).
Next, the bottom plate 8 is laminated on the bottom surface of the hoop material, and the frame 4 and the top plate 5 are laminated on the top surface to form the cavity 15 (FIGS. 3A to 3C, FIG. 4A). .
An appropriate amount of electrolyte is injected from the injection port 16 formed in the upper surface plate 5, and the entire upper surface plate 5 is covered with the sealing plate 6 to seal the injection port 16 (FIG. 4B).
Finally, each electric double layer capacitor 1 is cut out to complete the electric double layer capacitor 1 (FIG. 5).
(2) Details of Embodiment The electrochemical cell constituting the electronic component of the present embodiment will be described with reference to the drawings. In the following, an electric double layer capacitor will be described as an example as an embodiment, but the electronic component may be another type of electrochemical cell such as a nonaqueous electrolyte battery.

FIG. 1A is a side sectional view of the electric double layer capacitor 1 according to the present embodiment. This cross-sectional view is a cross-sectional view taken along the line BB in FIG.
The electric double layer capacitor 1 has, for example, a rectangular parallelepiped shape having a height of 1 [mm] or less, a length of about 2.5 [mm], and a width of about 3.0 [mm].

The electric double layer capacitor 1 is formed by laminating a bottom plate 8, metal plates 2a, 2b, a frame 4, a top plate 5, a sealing plate 6, and the like. The electrodes 3a and 3b are formed on the hollow portion 15 side of the metal plates 2a and 2b, and the metal layers 7a and 7b are formed on the other end side.
The bottom plate 8, the frame 4, the top plate 5, and the sealing plate 6 form a package having a cavity 15 (cavity) that houses the electrode 3.

Hereinafter, when the metal plates 2a and 2b, the electrodes 3a and 3b, and the metal layers 7a and 7b are not particularly distinguished, they are referred to as the metal plate 2, the electrode 3, and the metal layer 7.
Further, the side on which the bottom plate 8 is formed is the side that is surface-mounted on the substrate. In the following, the bottom plate 8 side is defined as the lower side, and the sealing plate 6 side is defined as the upper side.

The metal plates 2a and 2b are made of stainless steel having excellent corrosion resistance such as SUS304, SUS316, and SUS329J4L (austenitic / ferrite duplex stainless steel), and are formed by processing a hoop material as described later. . Here, the hoop material is a metal material formed in a band shape. The thickness of the metal plates 2a and 2b is, for example, about 0.1 [mm].
In the present embodiment, stainless steel is used as the metal plate 2, but other types of metal such as aluminum, copper-based pure metal, alloy, or cladding material may be used.

In the hollow portion 15, electrodes 3a and 3b are formed on the surfaces of the metal plates 2a and 2b, respectively. In the electric double layer capacitor 1, the electrodes 3a and 3b are formed symmetrically and can be used without distinguishing between positive and negative electrodes.
As will be described later, the electrodes 3a and 3b are formed by applying and rolling an electrode active material mainly composed of activated carbon on a hoop material constituting the metal plates 2a and 2b, and solidifying the electrode active material.
Moreover, although not shown in figure, the separator for preventing a short circuit can also be installed between electrode 3a, 3b.
As a material of the separator, for example, a non-woven fabric made of a material imparting hydrophilicity to the surface such as a heat-resistant resin such as PPS (polyphenylene sulfide), PEEK (polyether ether ketone), modified PEEK, PTFE (tetrafluoroethylene), or the like Glass fiber or ceramic porous body can be used. In addition, a gel polymer electrolyte can be disposed instead of the separator.

At the end portions of the metal plates 2a and 2b, bent portions 12a and 12b are formed which are bent downward outside the package and whose leading ends are bent toward the outside of the package. This outwardly bent portion is bonded to the substrate during surface mounting.
In the present embodiment, the tip of the metal plate 2 is bent toward the outside of the package, but may be bent inward.

The portion of the metal plate 2a where the electrode 3a is formed functions as a current collector, and the portion bent outside the package functions as a connection terminal for joining the electric double layer capacitor 1 to the substrate. It also functions as a through electrode that penetrates the package. The same applies to the metal plate 2b.
In addition, the portions of the metal plates 2a and 2b that penetrate the package (portions sandwiched between the bottom plate 8 and the frame 4) are formed on opposite sides on the same plane, and the electrodes 3a and 3b are also on the same plane. Formed on top. For this reason, the electric double layer capacitor 1 can be thinned.

The metal layers 7a and 7b are formed by plating in order to ensure solder wettability of the connection terminal portion of the metal plate 2, and are made of, for example, Ni, Sn, Au, or an alloy thereof.
In addition to plating, these metal layers can also be formed using a vapor phase method such as vapor deposition.

The bottom plate 8 is a resin sheet made of FRP (fiber reinforced plastic, in the present invention, PTFE reinforced with glass fiber), and is thermocompression-bonded (pressed while heating) to the bottom surface of the metal plate 2. Etc. are fused.
In addition to FRP, for example, a fluororesin such as PTFE (tetrafluoroethylene) or PFA (polytetrafluoroethylene) can be used.

The strengths of these materials are FRP, PTFE, and PFA in descending order, and the strength of the package can be increased by using the bottom plate 8 as FRP.
Further, since PFA has a property that it can be easily joined to SUS material, etc., PFA is used as a joining member. First, PFA is joined to the bottom surface of the metal plate 2 and further FRP is joined to the bottom plate. 8 may be configured.
In addition to FRP, PTFE, and PFA, usable resins include PEEK (polyether ether ketone), LCP (liquid crystal polymer), PPS (polyphenylene sulfide), modified PEEK, aromatic polyamide, modified aromatic polyamide, and the like. There are engineering plastics.

The frame 4 is made of, for example, PFA in which a rectangular opening is formed, and the thickness is set to be larger than the total thickness of the electrode 3 and the metal plate 2.
The frame 4 is joined to the upper surface of the metal plate 2 by thermocompression bonding or the like, and the electrodes 3 a and 3 b are located in the opening of the frame 4.

The upper surface plate 5 is a resin sheet material made of PFA, for example, and is joined to the upper surface of the frame 4 by thermocompression bonding or the like.
Although not shown, an inlet for injecting the electrolyte into the cavity 15 is provided in the center of the upper surface plate 5.
The upper surface of the bottom plate 8, the inner peripheral surface of the frame 4, and the lower surface of the top plate 5 form a cavity 15 that accommodates the electrodes 3 a and 3 b, and an appropriate amount of electrolyte is injected into the cavity 15.
The hollow portion 15 may be configured such that an impregnating material is sealed in order to form and maintain a liquid junction with the electrodes 3a and 3b, and the impregnating material is impregnated with an electrolyte. As the material of the impregnating material, the same material as the separator and polymer electrolyte described above can be used.

The sealing plate 6 is a resin sheet material made of, for example, FRP, and is joined to the upper surface of the upper surface plate 5 by thermocompression bonding or the like.
The sealing plate 6 seals the inlet of the top plate 5 and seals the cavity 15.
By making the sealing plate 6 FRP, the strength of the package can be increased.
The sealing plate 6 can be made of other types of resin such as PTFE.
In addition, it is desirable that the resin sheets to be laminated have the same or close thermal expansion coefficient. By aligning the thermal expansion coefficients, the package can be maintained without being damaged when the electric double layer capacitor 1 is heated by reflow or the like.

FIG. 1B is a plan sectional view of the electric double layer capacitor 1. In addition, this figure is sectional drawing in the AA line of Fig.1 (a).
The opening of the frame 4 is formed in a rectangular shape in accordance with the outer periphery of the electrodes 3a and 3b, and surrounds the periphery of the electrodes 3a and 3b.
Of the four sides of the frame 4, the portions through which the metal plates 2 a and 2 b penetrate are joined to the metal plates 2 a and 2 b, and the other portions are joined to the bottom plate 8 having the same outer shape as the frame 4. ing.

The electrode 3a has two convex portions formed in the direction of the electrode 3b, and the electrode 3b has two convex portions similarly formed in the direction of the electrode 3a. Note that more convex portions may be formed.
The convex portion of the electrode 3a faces the concave portion (between the convex portions) of the electrode 3b with a predetermined distance in the same plane, and the convex portion of the electrode 3b has a predetermined distance in the same plane with the concave portion of the electrode 3a. Are facing each other.

That is, a meandering gap is provided between the electrodes 3a and 3b so that the electrodes 3a and 3b are not short-circuited.
The reason why the electrodes 3a and 3b are uneven is formed so that the convex portions and the concave portions are opposed to each other in order to increase the regions where the electrodes 3a and 3b are opposed to reduce the internal resistance.

Next, a method for manufacturing the electric double layer capacitor 1 will be described with reference to FIGS.
First, as shown in FIG. 2A, a hoop material constituting the metal plate 2 is prepared.
The hoop material is formed in a strip shape in the vertical direction as viewed in the figure, and the broken lines at the upper end portion and the lower end portion indicate that the subsequent portions of the hoop material are omitted.

Next, as shown in FIG. 2 (b), plating with Ni, Sn, Au, or an alloy thereof is applied to portions of a predetermined width on both sides of the hoop material constituting the metal plate 2. This portion is a portion to be a connection terminal when surface-mounted later, and plating is for improving solder wettability.
In the present embodiment, the front and back surfaces on both sides of the metal plate 2 are plated, but only the side in contact with the substrate may be plated.

Next, as shown in FIG. 2 (c), an electrode active material to be the electrode 3 is applied to the center portion of the hoop material constituting the metal plate 2 and rolled. In the present embodiment, activated carbon is used as the electrode active material.
More specifically, activated carbon, carbon black (which functions as a conductor) or the like is added to a binder containing an organic solvent, kneaded, and applied and rolled. Thereafter, when the kneaded material is dried, the electrode 3 adheres to the surface of the metal plate 2.
The width for applying the electrode active material is set so as to secure the portion of the metal plate 2 to which the frame 4 will be joined later.

Next, as shown in FIG. 2 (d), the center of the hoop material is removed by press working.
Thereby, a plurality of sets of the electrode 3a and the electrode 3b are simultaneously formed along the hoop material. In addition, the bridge | bridging 10 which connects both between the pair of the electrode 3a and the electrode 3b is formed by being left behind by press work so that the electrode 3a and the electrode 3b may not isolate | separate.

Next, as shown in FIG. 3A, both sides of the hoop material are bent to form the bent portions 12a and 12b in the portions to be the connection terminals.
In addition, when extracting the electrodes 3a and 3b by press work, you may perform the bending process of a connection terminal simultaneously by press work. Alternatively, the electrodes 3a and 3b may be formed by pressing after bending the connection terminals.
In addition, below, the sectional view in the BB line is also illustrated on the top view of the hoop material.

Next, as shown in FIG. 3B, the bottom plate 8 is installed on the lower surface of the hoop material. Note that FIG. 3B shows only one set of electrodes 3a and 3b in order to omit the space of the drawing.
The width of the bottom plate 8 (width direction of the hoop material) is about the distance between the bent portions 12a and 12b, and a predetermined amount protrudes outside the electrodes 3a and 3b in the vertical direction (longitudinal direction of the hoop material). A recess having the same thickness and the same width as the electrode 3 may be formed in the bottom plate 8 and the electrode 3 may be fitted into the recess.

Next, as shown in FIG.3 (c), the frame 4 is installed in the upper surface of a hoop material, and the bottom face board 8 and the frame 4 are joined by thermocompression bonding.
The bottom plate 8 and the frame 4 are joined to the metal plate 2 at the portion in contact with the metal plate 2 and the bottom plate 8 and the frame 4 are in contact with each other (the portion protruding outward from the electrodes 3a and 3b). 8 and the frame 4 are directly joined.
By joining the bottom plate 8 and the frame 4, a container having a recess in which the electrodes 3a and 3b are formed at the bottom is formed.

Next, as shown in FIG. 4A, the upper surface plate 5 is installed on the upper surface of the frame 4, and the frame 4 and the upper surface plate 5 are joined by thermocompression bonding. Thereby, the cavity 15 is formed. In addition, when using a separator in order to prevent the short circuit of electrode 3a, 3b, after installing a separator between electrode 3a, 3b, the upper surface board 5 is joined.
When an electrolyte impregnating material is used, the top plate 5 is joined after the impregnating material is installed.

An injection port 16 for injecting an electrolyte is formed in the center of the upper surface plate 5.
After the upper surface plate 5 is joined, an electrolyte is injected from the injection port 16. The electrolyte is composed of, for example, a solution in which a supporting salt such as (CH 3) · (CH 4) 3 NBF 4 is dissolved in a nonaqueous solvent such as PC (propylene carbonate).

The injection port 16 is located between the electrodes 3a and 3b, and the electrolyte injected from the injection port 16 quickly spreads between the electrodes 3a and 3b.
Further, the electrolyte can be composed of gel or solid. In this case, after the electrolyte is placed on the electrodes 3a and 3b, the upper surface plate 5 is joined.

Next, as shown in FIG. 4B, the sealing plate 6 is installed on the upper surface of the upper surface plate 5 and bonded by heat fusion. At this time, it is possible to prevent the entire contents from being heated by heating the end portion of the upper surface plate 5, and to prevent the melted portion from being soiled by the vapor pressure of the contents or the discharged material, thereby improving the adhesion. Can contribute. Thereby, the inlet 16 is sealed and the strength of the package is increased.
Through the above steps, as shown in FIG. 5, a plurality of electric double layer capacitors 1 are simultaneously manufactured along the hoop material.

Next, as shown in FIG. 5, the electric double layer capacitor 1 is completed by separating the individual electric double layer capacitors 1. Cutting can be performed by pressing.
In the embodiment described above, the bottom plate 8, the frame 4, the top plate 5, and the sealing plate 6 are joined by thermocompression bonding, but the joining portion is melted with a laser and welded, or two-component or You may join using a one-component adhesive.

According to the embodiment described above, the following effects can be obtained.
(1) After applying and solidifying an electrode active material on a sheet-like metal plate, a plurality of electrodes 3a and 3b having a designed shape and spacing can be formed at a time by punching out the material. Thereby, it is possible to reduce the manufacturing cost and the defect occurrence rate.
(2) Since the electrodes 3 are formed on the same plane, the thickness can be reduced.
(3) Since a plurality of electric double layer capacitors 1 are formed on the sheet-like metal plate 2 at a time, the manufacturing cost can be reduced.
(4) A package can be easily created by laminating resin sheet materials.
(5) A package having both strength and airtightness can be formed by combining resin sheets having different properties such as a high strength FRP sheet and a highly adhesive PFA sheet.

Next, a modification of the present embodiment will be described with reference to FIGS.
FIG. 6A is a side sectional view of an electric double layer capacitor 1a according to a modification, and FIG. 6B is a plan sectional view of the electric double layer capacitor 1a.
6A is a cross-sectional view taken along the line BB in FIG. 6B, and FIG. 6B is a cross-sectional view taken along the line AA in FIG. 6A. The same reference numerals are given to the same components as those in the embodiment described above.

In the electric double layer capacitor 1a, the convex portions of the metal plate 2a and the metal plate 2b are twisted by 90 ° around the center line, and the surfaces on which the electrodes 3a and 3b are formed face each other. Thereby, the area of the electrode of the surface which faces can be expanded and the amount of electrical storage can be increased. The twist of the metal plates 2a and 2b can be formed by bending.
Further, the bottom plate 8 is formed with a concave portion 17 for accommodating the twisted metal plates 2a and 2b.

The concave portion 17 may be formed in the bottom plate 8 in advance, or the frame 21 formed of PFA or the like and the bottom plate 22 formed of FRP or the like are joined (in the figure, the joining surfaces of both members). A bottom plate 8 having a recess 17 (shown by a broken line) may be formed.
Although not shown, a separator is provided between the electrode 3a and the electrode 3b, and the electrolyte is filled.
Further, the portion 31a between two adjacent convex portions of the electrode 3a is pressed into a bellows (that is, the portion 31a is uneven in a direction perpendicular to the plane of the electrode 3a), and the portion 31b of the electrode 3b is similarly processed. Then, the internal resistance can be further reduced by narrowing the distance between the electrode 3a and the electrode 3b.

Each drawing in FIG. 7 is a diagram for explaining a modification of the shape of the electrode 3.
FIG. 7A shows an example in which the electrode 3c and the electrode 3d have a convex portion and a concave portion whose sides are oblique, and the electrode 3 is formed such that the convex portion of the electrode faces the concave portion of the other.
Since the electrode 3 is formed by stamping by pressing, the electrode 3 having an arbitrary shape can be formed by preparing a mold. Further, the uneven portion can be formed using a curve.
FIG. 7B shows an example in which the electrode 3e and the electrode 3f do not have a concavo-convex portion and the straight sides face each other with a predetermined interval.
As described above, the electrode 3 can be formed without an uneven portion.

FIG. 8 is a diagram for explaining an example in which an electrode is created by the lead frame 41.
The lead frame 41 is formed by applying an electrode active material to the central portion of a stainless steel or aluminum plate and extracting it with a press.
Then, opposing rectangular electrodes 3g and 3h are formed on the metal plate, and an electric double layer capacitor is formed by laminating a resin sheet material in the region 42.
In this way, an electric double layer capacitor can be produced using the lead frame 41 extracted from the metal plate without using a hoop material.

The following configuration can be obtained by the embodiment and the modification described above.
The package of the electric double layer capacitor 1 has a cavity 15 and functions as a container having a cavity sealed inside.
The electrodes 3a and 3b are configured using metal plates 2a and 2b coated with an electrode active material, and are opposed to each other at a predetermined distance in the cavity 15, so that the metal plate coated with an electrode active material on the surface And function as a pair of electrodes facing each other with a predetermined distance in the cavity.
Since the metal plates 2a and 2b penetrate the outside of the package in the opposite direction of the electrodes 3a and 3b in the same plane between the frame 4 and the bottom plate 8, they are integrally formed with each of the metal plates of the electrodes. And function as a pair of conductors penetrating to the outside of the container.
Since the electrolyte sealed in the cavity 15 is in contact with the electrodes 3a and 3b, it functions as an electrolyte in contact with the pair of electrodes.

  In addition, a convex portion and a concave portion are formed in a portion where the electrode 3a is opposed to the electrode 3b and a portion where the electrode 3b is opposed to the electrode 3a, and are arranged so that their own convex portions face each other's concave portion. Therefore, the facing portion of the electrode is formed in a concavo-convex shape, and the convex portion of one electrode faces the concave portion of the other electrode.

  In the electric double layer capacitor 1, the electrodes 3 a and 3 b are formed on the upper surfaces of the metal plates 2 a and 2 b in the cavity 15, and the lower surfaces of the metal plates 2 a and 2 b are the bottom of the cavity 15, that is, the bottom plate 8. Since the electrode active material is held on the upper surface, the electrode active material is formed on one surface of the metal plate, and the other surface of the metal plate is held on the bottom of the cavity.

  Further, in the electric double layer capacitor 1a, since the bases of the convex portions are twisted 90 ° around the center line so that the electrodes 3a and 3b face each other, the electrode is made of an electrode active material. The base part of the convex part is twisted so that the surface on which the is formed faces each other.

  Since the package is configured by laminating the bottom plate 8, the frame 4, the top plate 5, and the sealing plate 6, the container is configured by laminating resin sheet materials.

  Since the opening part which comprises the side surface of the cavity part 15 is formed in the frame 4, the opening part corresponding to the said cavity part is formed in the sheet | seat material which forms the said cavity part.

Further, the electric double layer capacitor 1 can be used, for example, as a clock function or a memory backup power source of an electronic device of a mobile phone.
In this case, the mobile phone charges the electric double layer capacitor 1 at the same time as the main power supply battery is mounted, and discharges the electric charge accumulated in the electric double layer capacitor 1 when the main power supply battery is removed, thereby providing an electronic device. Supply power to the clock function and memory.
For this reason, the mobile phone includes an electronic component constituted by the electric double layer capacitor 1, power storage means for storing power in the electronic component at the same time as a main power supply battery is mounted, a predetermined function such as a clock function or memory of the electronic device. Power to supply power to the other electronic components using the stored charge, such as to discharge the stored charge and supply power to the clock function or memory of the electronic device. It functions as an electronic device provided with supply means.

Moreover, the manufacturing method of the electric double layer capacitor 1 applies the electrode active material to the center surface of the hoop material to form the electrode 3, so that the surface of the center portion of the metal plate (hoop material) formed in a band shape An electrode active material forming step of applying an electrode active material to
In order to produce a plurality of opposing electrodes 3a, 3b along the hoop material by punching out the portion where the electrode 3 of the hoop material is formed by pressing, a part of the metal plate of the portion where the electrode active material is formed, An electrode forming step of forming a plurality of opposing electrodes along the band shape;
Further, in order to enclose the electrodes 3a and 3b together with the electrolyte in the cavity 15, there is an enclosing step of enclosing each of the pair of formed electrodes together with the electrolyte in the cavity of the container.
Further, in order to separate the individual packages by cutting the hoop material, there is a separation step of separating the individual containers by cutting the metal plate.

  Also, a package is made by laminating resin sheet materials such as the bottom plate 8 on the metal plates 2a and 2b, and the side facing the side on which the electrodes 3a and 3b of the metal plates 2a and 2b are formed is outside the package In the enclosing step, resin sheets are laminated on the front and back surfaces of the metal plate so that the end of the metal plate on which the electrode is not formed penetrates to the outside of the container. By doing so, the container is formed.

DESCRIPTION OF SYMBOLS 1 Electric double layer capacitor 2 Metal plate 3 Electrode 4 Frame 5 Top plate 6 Sealing plate 7 Metal layer 8 Bottom plate 10 Bridge 12 Bending part 15 Hollow part 16 Inlet 21 Frame 22 Bottom board 31 Part 41 Lead frame 42 Area

Claims (9)

A container having a sealed cavity inside;
A pair of electrodes that are formed using a metal plate with an electrode active material applied to the surface, and that are opposed to each other with a predetermined distance in the cavity,
A pair of conductors integrally formed with each of the metal plates of the electrode and penetrating to the outside of the container in the same plane;
An electrolyte in contact with the pair of electrodes;
An electronic component comprising:   2. The electronic component according to claim 1, wherein a facing portion of the electrode is formed in a concavo-convex shape, and a convex portion of one electrode faces a concave portion of the other electrode.   The said electrode active material is formed in one surface of the said metal plate, The other surface of the said metal plate is hold | maintained at the bottom part of the said cavity part, The Claim 1 or Claim 2 characterized by the above-mentioned. Electronic components.   The electronic component according to claim 2, wherein a base portion of the convex portion is twisted so that the surface on which the electrode active material is formed faces the electrode.   The electronic component according to any one of claims 1 to 4, wherein the container is configured by laminating resin sheet materials.   The electronic component according to claim 5, wherein an opening corresponding to the hollow portion is formed in the sheet material forming the hollow portion. An electronic component according to any one of claims 1 to 6, and
Power storage means for storing power in the electronic component;
With other electronic components that perform the specified function,
Power supply means for supplying power to the other electronic component using the stored charge;
An electronic device comprising: An electrode active material forming step of applying an electrode active material to the surface of the central portion of the metal plate formed in a band shape;
An electrode forming step of cutting a part of the metal plate of the portion where the electrode active material is formed and forming a plurality of opposing electrodes along the band shape;
An enclosing step of enclosing each of the formed pair of electrodes together with an electrolyte in a cavity of a container;
A separation step of cutting the metal plate to separate individual containers;
A method for manufacturing an electronic component, comprising:   In the enclosing step, the container is formed by laminating resin sheets on the front and back surfaces of the metal plate such that the end of the metal plate on which the electrode is not formed penetrates the outside of the container. The manufacturing method of the electronic component of Claim 8 characterized by the above-mentioned.

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