JP2002110480A - Method for forming electric double layer capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming an electric double layer capacitor wherein sealing is perfect and work is easy. SOLUTION: In an electric double layer capacitor 1, an activated carbon cloth is stuck on an electrode composed of aluminum by using conductive adhesive agent, and electrolytic gel films and the electrodes are laminated alternately. The electric double layer capacitor 1 is sealed temporarily and accommodated in a box 2, and clamping is performed with wedges 3. An upper end surface is capped with a lid plate 5, and lead wires 4 of the electric double layer capacitor are led out from one surface of the box 2. The box 2, the lid plate 5 and the wedges 3 are formed of resin which is not corroded by electrolytic gel and formed integrally by using thermal welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for forming an electric double layer capacitor.

[0002]

2. Description of the Related Art Currently, an electric double layer capacitor has an activated carbon fiber cloth adhered to an aluminum electrode with a conductive adhesive, an electrolyte gel film and the above-mentioned electrode (with an activated carbon fiber cloth) are alternately laminated, and the outer peripheral portion is thermally fused. I wear it. The aluminum electrode is adhered to a polybutylene terephthalate (PBT) frame. The sealing of the laminated capacitors is tightened with a vice, and the outer peripheral portion is attached by heat fusion. Further, a hot melt sheet is sandwiched between the outer peripheral portions thereof, and a PBT plate is applied thereto to seal the hot melt sheet by heat fusion.

[0003]

In the conventional molding method, a process of laminating, heat-contacting the outer peripheral portion, sanding the heat-sealed surface, and sealing the side plate using a heat-sealed sheet (hot-melt sheet) is employed. The work was complicated. In each step, if the positioning and the heat fusion are not reliable, the sealing is incomplete. The mechanical strength of the sealing part is insufficient. If the positions of the stacked frames are shifted, the sealing is incomplete.

[0004]

According to a first aspect of the present invention, there is provided a method of forming an electric double layer capacitor, comprising: attaching an activated carbon fiber cloth to an aluminum electrode with a conductive adhesive; In the electric double layer capacitor in which the electrodes are alternately laminated, the electric double layer capacitor is temporarily sealed, put into a box, tightened with a wedge, and closed at the upper end surface with a cover plate, and the lead wire of the electric double layer capacitor is placed on one side of the box. And the box and the wedge are made of a resin that does not corrode the electrolyte gel, and are integrated by heat fusion. According to a second aspect of the present invention, there is provided a method of forming an electric double layer capacitor, wherein the box and the wedge in the first aspect are made of polypropylene, vinyl chloride or polyethylene terephthalate.

[0005]

Embodiment 1 FIG. 1 shows a method for forming an electric double layer capacitor according to an embodiment of the present invention. First, the electric double-layer capacitor 1 is roughly positioned (temporarily sealed) using a vise, removed from the vise, and then placed in a box 2 made of polybutylene terephthalate (PBT). The electric double layer capacitor 1 has a state in which activated carbon fiber cloth is adhered to an aluminum electrode with a conductive adhesive, and this electrode and an electrolyte gel film are laminated.

As shown in FIG. 1, a box 2 made of PBT has a hexahedron open on one side, and an electric double layer capacitor 1 is inserted from the open side. Two PBT wedges 3 with slopes facing each other are put in the gap between the capacitors 1 in the PBT box 2 to adjust the dimensions of the box 2 and the capacitor 1. As shown in FIG. 3, the wedge 3 has a rectangular front surface, and left and right side surfaces are elongated thin triangles. Box 2
The wedge 3 is made of a resin that does not corrode the electrolyte gel.

By eliminating the gap by the wedge 3, the sealing can be completed. Further, when the wedge 3 is inserted and pressurized, the positions of the frames of the stacked capacitors 1 are accurately matched. Further, the lead wire 4 of the capacitor is taken out from the upper surface of the box 2.

[Embodiment 2] As in Embodiment 1, in the PBT box 2, the upper end surface of the stacked capacitor 1 is open. Therefore, as shown in FIG. 2, the upper end surface is closed with a PBT plate (cover plate) 5 and sealed by heat fusion. The wedge 3, the box 2, and the PBT plate 5 are made of a resin that does not corrode the electrolyte gel, and are integrated by heat fusion.

[Embodiment 3] Box 2 used in Embodiment 2 above
, The PBT plate 5 and the wedge 3 are made of polypropylene, and integrated by heat fusion.

[Embodiment 4] Box 2 used in Embodiment 2 above
, The PBT plate 5 and the wedge 3 are made of polyvinyl chloride and integrated by heat fusion.

[Embodiment 5] Box 2 used in Embodiment 2 above
, The PBT plate 5 and the wedge 3 are made of polyethylene terephthalate, and integrated by heat fusion.

[0012]

As described above, according to the present invention, the following effects can be obtained. Since the temporarily sealed capacitor is put in a box and further tightened with a wedge, the positioning of the lamination becomes accurate. Putting the capacitors in a box increases the mechanical strength. In addition, the sealing process is simplified. Sealing is ensured, and a highly reliable capacitor is obtained. The box, the wedge and the lid plate are integrated by heat fusion to complete the sealing.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a method for forming an electric double layer capacitor according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a method for forming an electric double layer capacitor according to a second embodiment of the present invention.

FIG. 3 is an explanatory view showing a wedge.

[Explanation of symbols]

 Reference Signs List 1 capacitor 2 box 3 wedge 4 lead wire 5 PBT plate (cover plate)

Claims (2)

[Claims] 1. An electric double layer capacitor in which an activated carbon fiber cloth is adhered to an aluminum electrode with a conductive adhesive and an electrolyte gel film and the electrode are alternately laminated, the electric double layer capacitor is temporarily sealed and put in a box. The top surface of the electric double layer capacitor is taken out from one side of the box, and the box, the cover plate and the wedge are made of a resin which does not corrode the electrolyte gel, and A method for forming an electric double layer capacitor, wherein the electric double layer capacitor is integrated by fusion. 2. The box and the wedge are made of polypropylene,
The method for forming an electric double layer capacitor according to claim 1, wherein the capacitor is made of vinyl chloride or polyethylene terephthalate.