JP2005026536A - Electric double layer capacitor and battery - Google Patents

Electric double layer capacitor and battery Download PDF

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Publication number
JP2005026536A
JP2005026536A JP2003191652A JP2003191652A JP2005026536A JP 2005026536 A JP2005026536 A JP 2005026536A JP 2003191652 A JP2003191652 A JP 2003191652A JP 2003191652 A JP2003191652 A JP 2003191652A JP 2005026536 A JP2005026536 A JP 2005026536A
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Japan
Prior art keywords
terminal
container
double layer
electric double
polarizable electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
JP2003191652A
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Japanese (ja)
Inventor
Kikuko Katou
Mamoru Kimoto
Yasuhiro Kishimoto
Hiroshi Nakajima
Seiji Omura
中島  宏
菊子 加藤
大村  誠司
泰広 岸本
衛 木本
Original Assignee
Sanyo Electric Co Ltd
三洋電機株式会社
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Priority to JP2003191652A priority Critical patent/JP2005026536A/en
Priority claimed from US10/558,484 external-priority patent/US7248460B2/en
Publication of JP2005026536A publication Critical patent/JP2005026536A/en
Withdrawn legal-status Critical Current

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Abstract

To provide an electric double layer capacitor and a battery using a container formed of an insulating material with less risk of leakage of electrolyte and ingress of moisture from the outside.
An electric double layer capacitor of the present invention includes a container 1 made of an insulating material that houses a first polarizable electrode 6 impregnated with an electrolyte, a separator 7 and a second polarizable electrode 8, respectively. A plate-like first terminal member 4 electrically connected to the first polarizable electrode 6 and a plate-like second terminal member 5 electrically connected to the second polarizable electrode 8 are provided. The first terminal member 4 and the second terminal member 5 penetrate the container 1 and extend to the outside, and the first terminal member 4 and the second terminal member 5 include the container 1 One or a plurality of openings 11 and 12 are formed in a portion buried in the wall portion of the container 1 leading to the outside. In the first terminal member and the second terminal member, one or a plurality of notches or nets may be formed in a portion buried in the wall portion of the container 1 reaching the outside of the container 1.
[Selection] Figure 2

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an electric double layer capacitor and a battery comprising an aqueous or non-aqueous electrolyte.
[0002]
[Prior art]
A small coin-type electric double layer capacitor is widely used mainly as a backup power source in electronic devices such as mobile phones and digital cameras. As is well known, a coin-type electric double layer capacitor has a pair of polarizable electrodes and a separator interposed between the polarizable electrodes housed in an internal space between a pair of metal cans insulated from each other. . The polarizable electrode and the separator are impregnated with an electrolytic solution (see Patent Document 1).
[0003]
Since electronic components to be mounted on a circuit board have been made into chips, a rectangular mounting region is often set on an electric double layer capacitor on the circuit board. However, when a coin-type electric double layer capacitor is arranged in a rectangular mounting region, the coin-type electric double layer capacitor has a disk shape, and a large empty portion is generated around each corner of the mounting region.
[0004]
If the outer shape of the electric double layer capacitor is square, the space can be reduced and the mounting area can be used effectively. In particular, since a larger capacitor can be mounted, there is an advantage that the capacity of the electric double layer capacitor used for the circuit board can be further increased. In order to make the external shape of the electric double layer capacitor square, it is necessary to form both metal cans in a square shape. However, when such a configuration is adopted, it becomes difficult to seal the metal cans with a gasket. . Therefore, it is conceivable to form an electric double layer capacitor container with an insulating resin or ceramic. Thereby, the electric double layer capacitor can be formed into a chip.
[0005]
[Patent Document 1]
JP-A-8-64484 [0006]
[Problems to be solved by the invention]
In water-based and non-aqueous electric double layer capacitors using a container formed of insulating resin or ceramic, the lead member or current collector connected to the polarizable electrode must be drawn out through the container. become. However, in such an electric double layer capacitor, since the adhesion between the lead member or current collector and the container is not high, the electrolyte inside the container may leak between the lead member or current collector and the container. Is expensive. In addition, there is a high possibility that moisture may enter the container from the outside through the space between the lead member or the current collector and the container. In a non-aqueous electric double layer capacitor, when water is mixed into the electrolyte, the mixed water causes electrolysis, and the performance is adversely affected.
[0007]
Since the water-based and non-aqueous electrolyte batteries have the same structure as the electric double layer capacitor, the above problem also occurs when the outer shapes of the water-based and non-aqueous electrolyte batteries are made square.
[0008]
The present invention solves the above-described problems, and provides an electric double layer capacitor and a battery using a container formed of an insulating material with less risk of leakage of electrolyte and entry of moisture from the outside. .
[0009]
[Means for Solving the Problems]
The electric double layer capacitor of the present invention includes a first polarizable electrode impregnated with an electrolytic solution, a container made of an insulating material for accommodating the separator and the second polarizable electrode, and an electric current connected to the first polarizable electrode. A plate-like first terminal member connected to each other and a plate-like second terminal member electrically connected to the second polarizable electrode, wherein the first terminal member and the second terminal The member penetrates the container and extends to the outside, and the first terminal member and the second terminal member include one or a plurality of parts in a portion embedded in the wall portion of the container reaching the outside of the container. Openings, cutouts, or nets are formed.
[0010]
The chip-type electric double layer capacitor of the present invention includes a first polarizable electrode impregnated with an electrolytic solution, a container made of an insulating material for accommodating a separator and a second polarizable electrode, and the first component. A plate-like first terminal member electrically connected to the polar electrode; and a plate-like second terminal member electrically connected to the second polarizable electrode, the first terminal member and The second terminal member penetrates the container and extends to the outside, and the first terminal member and the second terminal member have a thin portion embedded in the wall of the container reaching the outside of the container. It has become.
[0011]
[Action and effect]
In the first terminal member and the second terminal member, by forming one or a plurality of openings, cutouts, or nets in a portion buried in the wall portion of the container reaching the outside of the container, the container and the portion The contact area is reduced. As a result, the area of the path through which the electrolytic solution inside the container leaks to the outside of the container is reduced, and the path becomes complicated, so that leakage of the electrolytic solution is suppressed. In addition, the area of the path through which moisture outside the container enters the inside of the container is reduced, and the path becomes complicated, so that the ingress of moisture is also suppressed. In the first terminal member and the second terminal member, the contact area between the container and the part is also reduced by thinning the part buried in the wall part of the container that reaches the outside of the container. Infiltration of moisture from the outside can be suppressed.
[0012]
In addition to the above configuration, for example, if the first terminal member is bent inside the wall portion of the container and extended to the outside, the first terminal member is more difficult to be removed from the container. Furthermore, since the path of the electrolytic solution and moisture becomes longer and complicated in the direction of the wall thickness of the container, leakage of the electrolytic solution and intrusion of moisture from the outside can be further suppressed. The same applies to the second terminal member.
[0013]
It is easily understood that the present invention can be applied to a battery by using the first polarizable electrode as a positive active material and the second polarizable electrode as a negative active material in the above configuration.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a chip-type non-aqueous electric double layer capacitor to which the present invention is applied. The electric double layer capacitor of this example includes a container (1) having a rectangular parallelepiped outer shape made of an insulating material. The container (1) is formed of a liquid crystal polymer (LCP). The container (1) is an insulating resin such as deformed polyamide or nylon resin, and is an insulating thermoplastic such as polyethylene terephthalate (PBT), polypropylene (PP) or polyphenylene sulfide (PPS), or an insulating material such as alumina. It may be formed of a conductive ceramic or glass.
[0015]
The container (1) is formed in a rectangular shape by combining the first container half (2) and the second container half (3). In the internal space of the container (1), the first polarizable electrode And capacitor elements such as second polarizable electrodes are accommodated. From the inside of the container (1), a plate-like first terminal member (4) is drawn out through the container (1). Further, the plate-like second terminal member (5) is drawn out of the container (1) in the direction opposite to the first terminal member (4). FIG. 1 (a) is a perspective view of the electric double layer capacitor as viewed from the side from which the first terminal member (4) is drawn, and FIG. 1 (b) is a drawing of the second terminal member (5). It is a perspective view of the electric double layer capacitor seen from the side which is.
[0016]
FIG. 2 is a cross-sectional view of the electric double layer capacitor taken along the vertical plane including line AA in FIG. 1 and viewed in the direction of the arrows. The first container half (2) and the second container half (3) are rectangular parallelepiped block-shaped members (see FIG. 6). These container halves (2) and (3) are both rectangular parallelepiped. A depression is formed. These container halves (2) and (3) are combined so that the recesses face each other, and the inner space of the container (1) is formed by combining these recesses. One of these container halves (2) and (3) may be formed in a plate shape and the other opened in a box shape.
[0017]
In the internal space of the container (1), in order from the first container half (2) side to the second container half (3) side, a first terminal member (4), a first polarizable electrode (6), a separator (7) The second polarizable electrode (8) and the second terminal member (5) are placed. The first terminal member (4) is electrically connected to the first polarizable electrode (6), and the horizontal portion disposed in the internal space of the container (1) serves as a current collector. It is manufactured by processing a plate material such as stainless steel, tungsten or aluminum which is a suitable material as a current collector of an electric double layer capacitor. One end side of the first terminal member (4) penetrates the wall of the first container half (2) and extends to the outside, and the portion extending to the outside of the container (1) is the container (1 ) And further along the bottom surface of the container (1). The tip of one end of the first terminal member (4) is disposed on the bottom surface of the container (1) and becomes a part to be soldered to the circuit board.
[0018]
The second terminal member (5) is electrically connected to the second polarizable electrode (8), and the horizontal portion arranged in the internal space of the container (1) serves as a current collector. It is manufactured by processing a plate material such as stainless steel, which is a suitable material as a current collector of an electric double layer capacitor. One end side of the second terminal member (5) extends through the wall of the second container half (3) to the outside of the container (1). The portion extending to the outside of the second terminal member (5) is also bent along the side surface of the container (1) and further along the bottom surface of the container (1). The tip of one end of the second terminal member (5) is disposed on the bottom surface of the container (1) and becomes a part to be soldered to the circuit board. In addition, the 2nd terminal member (5) does not need to be formed with the same material as the 1st terminal member (4).
[0019]
For the first polarizable electrode (6) and the second polarizable electrode (8), activated carbon powder or activated carbon fiber formed into a sheet or block shape is used. Carbon nanomaterials, such as fullerene and a carbon nanotube, can also be used for the 1st polarizable electrode (6) and the 2nd polarizable electrode (8). Moreover, an activated carbon / carbon composite can also be used for the first polarizable electrode (6) and the second polarizable electrode (8). For the separator (7), a glass fiber nonwoven fabric, pulp paper, or a film formed of an insulating resin such as polytetrafluoroethylene (PTFE) is used.
[0020]
The first polarizable electrode (6), the separator (7), and the second polarizable electrode (8) are impregnated with an electrolytic solution. In this example, an electrolyte such as tri-ethyl-methyl-ammonium-tetra-fluoro-boride (Et 3 MeNBF 4 ) or tetra-ethyl-ammonium-tetra-fluoro-boride (Et 4 NBF 4 ) is used as an aprotic organic material. An electrolytic solution dissolved in a solvent is used. As the aprotic organic solvent, carbonate, lactone, nitrile, amide, nitroalkane, sulfone, sulfoxide, phosphade, or a bifunctional solvent such as dinitrile or ether nitrile is used. Further, propylene cardnate (PC), ethylene carbonate (EC), gamma butyrolactone (GBL), sulfolane (SFL), acetonitrile (AN), or the like is used as the electrolyte. Furthermore, an ionic liquid such as 1-methyl-3-methyl-imidazolium may be used as the electrolytic solution.
[0021]
The first terminal member (4) and the second terminal member (5) have a portion buried in the wall portion of the container (1) reaching the outside of the container (1), that is, in the wall portion of the container (1). A plurality of openings (11) and (12) are opened in the arranged portions. These openings (11), (12) are filled with a liquid crystal polymer forming the container (1). FIG. 3 is a plan view of the first container half (2). In this figure, the part of the 1st terminal member (4) buried in the wall part of the 1st container half (2) is shown with the broken line. In the first terminal member (4), openings (11) are opened in a plurality of places, for example, three places, in the portion buried in the wall portion of the first container half (2) reaching the outside of the container. Similarly, the second terminal member (5) has three openings (12). The size of the openings (11) and (12) is determined so that the area of the surface of the terminal members (4) and (5) in contact with the container (1) is reduced by opening the openings (11) and (12). It is done. If the openings (11) and (12) are too small, the area of the surface of the terminal members (4) and (5) in contact with the container (1) will increase.
[0022]
4 (a) to 4 (d) are plan views of the first container half (2) showing another embodiment of the first terminal member (4). In this figure, the part of the 1st terminal member (4) buried in the wall part of the 1st container half (2) is shown with the broken line. In the embodiment shown in FIG. 4 (a), the first terminal member (4) has two notches (13) in the portion buried in the wall of the first container half (2) reaching the outside of the container. It is formed in the place. In the embodiment shown in FIG. 4 (b), a mesh portion (14) is formed in the portion of the first terminal member (4). The mesh of the mesh part (14) has a rhombus shape, and the mesh part (14) is extended by forming a large number of cuts on the base material of the first terminal member (4) in the same manner as the expanded metal. It is formed by. In the embodiment shown in FIG. 4 (c), the mesh of the mesh part (14) has a round shape, and the mesh part (14) is formed of a punching metal and a plate material serving as a base of the first terminal member (4). Similarly, it is formed by punching. In the form shown in FIG. 4 (d), the first terminal member (4) has a portion buried in the wall portion of the first container half (2) reaching the outside of the container, in addition to the mesh portion (14). Furthermore, the notch (13) is formed in two places. A cutout (13) may be formed in the first terminal member (4) in addition to the opening (11) shown in FIG. The meshes of the notches (13) and the mesh part (14) are filled with the resin forming the container (1). The size of the mesh of the notch (13) and the mesh part (14) is determined so that the area of the surface of the first terminal member (4) that contacts the container (1) is reduced by forming these. . Notches (13) and nets (14) may also be formed in the second terminal member (5) as shown in FIGS. 4 (a) to (d).
[0023]
A method for manufacturing the electric double layer capacitor of this example will be described. First, as shown in FIG. 5, the opening (11) is opened in three places in the board | plate material (31) used as the base of a 1st terminal member (4). Openings (12) are opened at three locations in the plate (32) serving as the base of the second terminal member (5). In the case of the electric double layer capacitor described later with reference to FIG. 8, the bending process of the terminal members (4) and (5) is performed after these processes.
[0024]
Next, as shown in FIG. 6, a first container half (2) is produced on the plate (31) by insert molding. In the first container half (2), one end side of the plate (31) is disposed on the bottom surface of the depression of the first container half (2), and the other end of the plate (31) is the first container half (2). ) And the edge on one end side of the plate (31) is made to be buried in the wall of the first container half (2). Further, the first container half (2) is manufactured so that the opening (11) formed in the plate material (31) is filled with the resin that forms the wall of the first container half (2). Similarly, the second container half (3) is also produced on the plate (32) serving as the base of the second terminal member (5).
[0025]
As shown in FIG. 7, the produced 1st container half body (2) is made into the attitude | position which orient | assigned the hollow upwards. Then, the first polarizable electrode (6) is bonded to the plate (31) using a conductive adhesive. Thereafter, the separator (7) impregnated with the electrolytic solution is placed on the first polarizable electrode (6), and the electrolytic solution is injected into the recess of the first container half (2). The second container half (3) is obtained after the second polarizable electrode (8) is adhered to the plate (32) using a conductive adhesive, and the second polarizable electrode (8) is impregnated with the electrolytic solution. It is mounted on the first container half (2) with the depression facing downward. With the above, a laminated structure of capacitor elements in the internal space of the container (1) shown in FIG. 2 is completed. And the wall part end surface (2a) of the 1st container half body (2) and the wall part end surface (3a) of the 2nd container half body (3) are joined by ultrasonic welding, and finally board | plate material (31) When the protruding portion of (32) is bent along the outer surface of the container (1), the electric double layer capacitor of this example is completed. A water-based electric double layer capacitor, a non-aqueous electrolyte battery, and a water-based electrolyte battery to which the present invention to be described later is applied are similarly manufactured.
[0026]
FIG. 8 is a cross-sectional view showing an electric double layer capacitor according to a second embodiment of the present invention. As shown in FIG. 2, in the previous embodiment, the first terminal member (4) and the second terminal member (5) pass straight through the wall of the container (1). Then, the first terminal member (4) and the second terminal member (5) are bent twice in the wall portion and drawn out of the container (1). FIG. 9 is a perspective view of the second terminal member (5). In the horizontal part (51) that has entered the inside of the wall of the container (1) from the outside of the container (1), there are three openings (12), and the horizontal part in the inside of the container (1). In the vertical portion (52) extending vertically from (51), four openings (12) are opened. Similarly, openings (11) are formed in the horizontal portion (41) and the vertical portion (42) of the first terminal member (4).
[0027]
As shown in FIG. 9, the opening (12) formed in the horizontal portion (51) of the second terminal member (5) and the opening (12) formed in the vertical portion (52) are shown in FIG. ) And are shifted in the horizontal direction as in the round mesh of the mesh portion shown in FIG. This lengthens and complicates the path through which the electrolytic solution inside the container leaks to the outside of the container, so that leakage of the electrolytic solution is suppressed. Moreover, since the path | route for the water | moisture content outside a container permeates into a container becomes long and complicated, the permeation of a water | moisture content is also suppressed. A plurality of notches (13) may be formed in the horizontal portion (51) and the vertical portion (52) as shown in FIG. 10 (a), and the mesh portion (14) as shown in FIG. 10 (b). May be formed. The same applies to the horizontal portion (41) and the vertical portion (42) of the first terminal member (4). In FIG. 10 (a), two notches (13) are formed in each of the horizontal portion (51) and the vertical portion (52), but the sizes of these two notches (13) are the same. In addition, the region (53) between the notches (13) in the horizontal portion (51) and the region (54) between the notches (13) in the vertical portion (52) are shifted in the lateral direction. In this way, by forming the notch (13) so that these regions (53) and (54) are displaced, the path through which the electrolyte inside the container leaks to the outside becomes long and complicated. Is suppressed. Moreover, since the path | route for the water | moisture content outside a container permeates into a container becomes long and complicated, the permeation of a water | moisture content is also suppressed.
[0028]
In the electric double layer capacitor of the second embodiment of the present invention shown in FIG. 8, in addition to forming the openings (11) (12), the notches (13) or the mesh portions (14), the first terminal member ( Since the 4) and the second terminal member (5) are bent in the wall portion, the terminal members (4) and (5) are more difficult to be removed from the container (1). In addition, since the path of the electrolyte and moisture becomes longer in the wall thickness direction of the container and the contact surface between the container (1) and the terminal members (4) and (5) is complicated, the electrolyte is more difficult to leak. Thus, moisture is more difficult to enter the container (1) from the outside. The number of times of bending of the first terminal member (4) and the second terminal member (5) is not limited as long as these terminal members (4) and (5) can be pulled out of the container (1). At least one of the first terminal member (4) and the second terminal member (5) may be bent in the wall portion of the container (1).
[0029]
FIG. 11 is a cross-sectional view showing an electric double layer capacitor according to a third embodiment of the present invention. In the electric double layer capacitor of the previous embodiment, in order to simplify the structure, the first terminal member (4) and the second terminal member (5) are made of the same material as that used for the current collector. Yes. On the other hand, in the electric double layer capacitor of the present embodiment, the first terminal member (4) is joined to the plate-like first lead member (15) and the first lead member (15). It is comprised by the 1st collector part (16) for the current collection from an electrode (6). Further, the first terminal member (5) is used for collecting electricity from the plate-like first lead member (17) and the second polarizable electrode (8) joined to the first lead member (17). The second current collector section (18) is used.
[0030]
The first current collector portion (16) is formed of a material suitable as a current collector such as stainless steel, aluminum, or tungsten. The first lead member (15) is a conductive metal (including an alloy; the same applies hereinafter) different from the material forming the first current collector (16), and is formed of, for example, copper, nickel, a copper alloy, or the like. And is drawn out through the container (1). Of course, the first lead member (15) may be formed of a material suitable as a current collector. The first current collector (16) is provided in a horizontal portion of the first lead member (15) disposed in the internal space of the container (1) so as to contact the first polarizable electrode (6). The first current collector portion (16) is formed by forming an aluminum layer or a tungsten layer on the surface of the first terminal member (4) by a method such as plasma spraying, or an aluminum foil or a tungsten foil. The first terminal member (4) is provided by bonding to the surface of the one terminal member (4). The first current collector (16) may be formed by a plating process. The first current collector portion (16) needs to be provided at least on the first polarizable electrode (6) side of the horizontal portion of the first lead member (15), but may be provided so as to cover the horizontal portion. Good.
[0031]
The second current collector (18) is formed of a material suitable as a current collector such as stainless steel. The second lead member (17) is a conductive metal different from the material forming the second current collector portion (18), and is formed of, for example, copper, copper alloy or nickel, and penetrates the container (1). And pulled out. Of course, the second lead member (17) may be formed of a material suitable as a current collector. It is provided in the horizontal part of the 2nd lead member (17) arrange | positioned in the interior space of a container (1) so that a 2nd polarizable electrode (8) may be contacted. The second current collector portion (18) needs to be provided at least on the second polarizable electrode (8) side of the horizontal portion of the second lead member (17), but may be provided so as to cover the horizontal portion. Good. The second current collector (18) is provided on the second terminal member (5) in the same manner as the first current collector (16). Note that it is not necessary that both the first terminal member (4) and the second terminal member (5) have the same configuration as shown in FIG. 11, and either one of them is connected to the lead member as shown in FIG. It is good also as a structure which integrated the electrical power collector. Further, at least one of the first terminal member (4) and the second terminal member (5) may be bent in the wall portion of the container (1) as shown in FIG.
[0032]
As shown in FIG. 3, each of the first terminal member (4) and the second terminal member (5) has an opening (11) in the portion buried in the wall portion of the container (1) reaching the outside of the container (1). ) (12) has been established. The first current collector (16) passes through the wall of the container (1) and extends at one end to the outside of the container (1). Each opening (11) has a first lead member (15) and It is established over the first current collector section (16). On the other hand, the edge of the second current collector (18) is not buried in the wall of the container (1), and the second current collector (18) is not in contact with the container (1). Each opening (12) is opened only in the second lead member (17). The first terminal member (4) may be configured as a second terminal member (5), and the second terminal member (5) may be configured as a first terminal member (4). Moreover, you may form a notch (13) and a net | network part (14) as shown in FIG. 4 in a terminal member (4) (5).
[0033]
FIG. 12 is a sectional view showing an electric double layer capacitor according to a fourth embodiment of the present invention. Part of the first terminal member (4) and the second terminal member (5) is formed thin. These thinly formed portions penetrate the container (1), and the portions of the terminal members (4) and (5) buried in the wall portion reaching the outside of the container (1) are thin. Thereby, since the contact area of the both sides | surfaces of a terminal member (4) (5) and a container (1) reduces, the leakage of electrolyte solution and the penetration | invasion of the water | moisture content from the outside are suppressed. Furthermore, as in the previous embodiment, an opening (12), a notch (13) or a net (14) may be formed in the terminal member (4) (5), and the terminal member (4) ( 5) may be bent in the wall. Moreover, you may comprise a terminal member (4) (5) by a lead member (15) (17) and a collector part (16) (18).
[0034]
The present invention can be applied to an aqueous electric double layer capacitor. In this case, an aqueous solution such as H 2 SO 4 or KOH is used as the electrolytic solution, and the first current collector portion (16) and the second current collector portion (18) shown in FIG. Alternatively, a conductive elastomer is used. Moreover, a polypropylene sheet, a polyethylene porous film, a glass fiber incombustible cloth, or the like is used for the separator (7). In addition, when applying this invention to a water-system electric double layer capacitor, you must avoid that a 1st lead member (15) and a 2nd lead member (17) contact electrolyte solution. When the present invention is applied to a water-based electric double layer capacitor, the second current collector portion (18) is configured in the same manner as the first current collector portion (16), and the second lead member (17) is the container (1). ) Must not be exposed to the internal space.
[0035]
The present invention can be applied to a non-aqueous electrolyte battery. In this case, for example, the first polarizable electrode (6) shown in FIG. 11 is replaced with a positive active material (61), and the second polarizable electrode (8) is replaced with a negative active material (81). When the present invention is applied to a lithium ion battery, the positive active material (61) is formed by pressure molding or sintering a powder of lithium cobaltate, lithium manganate, lithium nickelate or the like, and is a negative active material. For (81), a graphite-type carbon material or a coke-type carbon material powder formed by pressure molding or sintering is used. An organic solvent in which a lithium salt is dissolved is used for the electrolytic solution. For example, LiBF 4 , LiClO 4 , LiPF 6 , LiAsF 6 , Li (CF 3 O 2 ) 2 N or LiC 4 F 9 SO 3 is used as the lithium salt, and propylene carbonate, gamma butyrolactone, Alternatively, a mixed solution of any of these and a chain carbonate ester is used. As the chain carbonate, dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), or the like is used. For the separator (7), a polymer porous film such as polyolefin, polyethylene or polypropylene is used. The first current collector portion (16) is made of aluminum or the like, and the second current collector portion (18) is made of copper or the like. The first lead member (15) is a conductive metal different from the material forming the first current collector portion (16), and the second lead member (17) forms the second current collector portion (18). It is formed of a conductive metal different from the material. The first lead member (15) may be formed of aluminum or the like, the second lead member (17) may be formed of copper or the like, and the current collector and the lead member may be integrated as shown in FIG. .
[0036]
The present invention can be applied to an aqueous electrolyte battery. In this case, for example, the first polarizable electrode (6) shown in FIG. 11 is replaced with a positive active material (61), and the second polarizable electrode (8) is replaced with a negative active material (81). When the present invention is applied to a nickel metal hydride battery, a positively active material (61) is obtained by sintering or compression-molding nickel oxide powder or pellets, and a negative active material (81) is Mm−. Ni-Co-Mn--Al (Mm is a mixture of rare earth elements) based hydrogen storage alloy powder or pellets sintered or compression-molded are used. For the electrolyte, KOH or a polymer hydrogel electrolyte is used. A polymer porous film such as sulfonated polypropylene is used for the separator (7). Foamed nickel is used for the first current collector portion (16) and the second current collector portion (18). For the lead members (15) and (17), a metal such as copper, aluminum or nickel is used.
[0037]
In the above description, the case where the present invention is mainly applied to a non-aqueous electric double layer capacitor is mainly taken up, but the case where the present invention is applied to an aqueous electric double layer capacitor, a non-aqueous electrolyte battery, and an aqueous electrolyte battery. In addition, as shown in FIG. 4, notches (13) and nets (14) may be formed in the terminal members (4) and (5). As shown in FIGS. 4) (5) may be bent in the wall of the container (1). In the present invention, the shape, number and combination of the openings (11) and (12), the notches (13) and the mesh portion (14) are not particularly limited as long as the object of the present invention can be achieved. In the terminal members (4) and (5), the openings (11) and (12) or the notches (13) may be formed at one place, and the nets (14) may be formed at a plurality of places.
[0038]
The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Each part configuration of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electric double layer capacitor of the present invention. (A) A figure is the figure seen from the drawer surface of the 1st lead member, (b) A figure is a figure seen from the drawer surface of the 2nd terminal member.
FIG. 2 is a cross-sectional view of the electric double layer capacitor of the present invention.
FIG. 3 is a plan view of a container half of the electric double layer capacitor of the present invention.
FIG. 4 is a plan view of a container half of the electric double layer capacitor of the present invention. 4 (a) to 4 (d) show different embodiments of the terminal member, respectively.
FIG. 5 is a perspective view showing a state in which an opening is formed in a plate material which is a base of a terminal member of the electric double layer capacitor of the present invention.
FIG. 6 is a perspective view showing a state where a container half is formed on a plate material which is a base of a terminal member of the electric double layer capacitor of the present invention.
FIG. 7 is an explanatory view showing a manufacturing process of the electric double layer capacitor according to the present invention.
FIG. 8 is a cross-sectional view of an electric double layer capacitor according to the present invention.
FIG. 9 is a perspective view of a second terminal member of the electric double layer capacitor of the present invention.
FIG. 10 is a perspective view of a second terminal member of the electric double layer capacitor of the present invention. 10 (a) and 10 (b) show different embodiments of the second terminal member, respectively.
FIG. 11 is a cross-sectional view of the electric double layer capacitor or battery of the present invention.
FIG. 12 is a cross-sectional view of the electric double layer capacitor of the present invention.
[Explanation of symbols]
(1) Container (4) First terminal member (5) Second terminal member (6) First polarizable electrode (7) Separator (8) Second polarizable electrode (11) Opening (12) Opening (13) Cutting Notch (14) Net part (15) First lead member (16) First current collector part (17) Second lead member (18) Second current collector part (61) Positive active material (81) Negative active material

Claims (8)

  1. A container (1) made of an insulating material for housing a first polarizable electrode (6), a separator (7) and a second polarizable electrode (8) impregnated with an electrolyte, respectively, and the first polarizable A plate-like first terminal member (4) electrically connected to the electrode (6), and a plate-like second terminal member (5) electrically connected to the second polarizable electrode (8); With
    The first terminal member (4) and the second terminal member (5) extend through the container (1) to the outside,
    In the first terminal member (4) and the second terminal member (5), one or a plurality of openings (in the portion buried in the wall portion of the container (1) reaching the outside of the container (1) ( 11) An electric double layer capacitor in which a notch (12), a notch (13), or a mesh part (14) is formed.
  2. A container (1) made of an insulating material for housing a first polarizable electrode (6), a separator (7) and a second polarizable electrode (8) impregnated with an electrolyte, respectively, and the first polarizable A plate-like first terminal member (4) electrically connected to the electrode (6), and a plate-like second terminal member (5) electrically connected to the second polarizable electrode (8); With
    The first terminal member (4) and the second terminal member (5) extend through the container (1) to the outside,
    The first terminal member (4) and the second terminal member (5) are electric double layer capacitors in which a portion embedded in a wall portion of the container reaching the outside of the container is thinned.
  3. At least one of the first terminal member (4) and the second terminal member (5) is bent at a portion embedded in the wall portion of the container (1) reaching the outside of the container (1). The electric double layer capacitor according to claim 1 or 2.
  4. At least one of the first terminal member (4) and the second terminal member (5) includes a lead member (15) (17) and a current collector portion (16) (18). The electric double layer capacitor according to any one of claims 1 to 3.
  5. A container (1) made of an insulating material containing a positive active material (61), a separator (7) and a negative active material (81) each impregnated with an electrolytic solution, and the first polarizable electrode (6) And a plate-like second terminal member (5) electrically connected to the second polarizable electrode (8). ,
    The first terminal member (4) and the second terminal member (5) extend through the container (1) to the outside,
    In the first terminal member (4) and the second terminal member (5), one or a plurality of openings (in the portion buried in the wall portion of the container (1) reaching the outside of the container (1) ( 11) A battery in which a notch (13), a notch (13), or a mesh part (14) is formed.
  6. A container (1) made of an insulating material containing a positive active material (61), a separator (7) and a negative active material (81) each impregnated with an electrolytic solution, and the first polarizable electrode (6) A plate-like first terminal member (4) electrically connected to the plate and a plate-like second terminal member (5) electrically connected to the second polarizable electrode (8). ,
    The first terminal member (4) and the second terminal member (5) extend through the container (1) to the outside,
    In the battery, the first terminal member (4) and the second terminal member (5) are thinned in a portion embedded in the wall portion of the container (1) reaching the outside of the container (1).
  7. At least one of the first terminal member (4) and the second terminal member (5) is bent at a portion embedded in the wall portion of the container (1) reaching the outside of the container (1). The battery according to claim 5 or 6.
  8. At least one of the first terminal member (4) and the second terminal member (5) includes a lead member (15) (17) and a current collector portion (16) (18). The battery according to any one of claims 5 to 7.
JP2003191652A 2003-07-04 2003-07-04 Electric double layer capacitor and battery Withdrawn JP2005026536A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003191652A JP2005026536A (en) 2003-07-04 2003-07-04 Electric double layer capacitor and battery

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2003191652A JP2005026536A (en) 2003-07-04 2003-07-04 Electric double layer capacitor and battery
US10/558,484 US7248460B2 (en) 2003-05-30 2004-05-27 Electric double layer capacitor and electrolytic cell
EP20040735134 EP1630834A1 (en) 2003-05-30 2004-05-27 Electric double layer capacitor and electrolytic cell
PCT/JP2004/007680 WO2004107373A1 (en) 2003-05-30 2004-05-27 Electric double layer capacitor and electrolytic cell
TW93115248A TWI237280B (en) 2003-05-30 2004-05-28 Electrical double layer capacitor and electrolytic battery

Publications (1)

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JP2005026536A true JP2005026536A (en) 2005-01-27

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005158700A (en) * 2003-10-30 2005-06-16 Kyocera Corp Battery case and battery
JP2011023531A (en) * 2009-07-15 2011-02-03 Ud Trucks Corp Electric storage device and method for manufacturing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005158700A (en) * 2003-10-30 2005-06-16 Kyocera Corp Battery case and battery
JP4671652B2 (en) * 2003-10-30 2011-04-20 京セラ株式会社 Battery case and battery
JP2011023531A (en) * 2009-07-15 2011-02-03 Ud Trucks Corp Electric storage device and method for manufacturing the same

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