JPH06349682A - Electronic components and their manufacture - Google Patents

Abstract

PURPOSE:To prevent the short-circuiting of lead terminals with their adjacent components by covering each electrode surface of cell cases and the base sections of the lead terminals fitted to the electrode surfaces with a sleeve. CONSTITUTION:After putting two cell cases 1 and 1 upon another with a cup- like holder 2 in between, the base sections 4a of lead terminals 4 are welded to the electrode surfaces of the cases 1 and 1 by using a laser beam, etc. After welding, the base sections 4a are covered with a sleeve composed of a heat- shrinkable synthetic resin tube. It is preferable to put the sleeve 5 on the entire bodies of the cases 1 and 1 except the front end sections 4b of the lead terminals from the direction parallel to the electrode surfaces of the cases 1. After putting the sleeve 5, the sleeve 5 is shrunk by, for example, blowing a hot blast upon the sleeve 5. As a result, an electrical double-layer capacitor in which the electrode surfaces of the cell cases 1 and the base sections 4a of the lead terminals 4 are covered with the sleeve 5 is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic components such as electric double layer capacitors and batteries, and more particularly to electronic components suitable for high-density mounting and a method of manufacturing the same.

[0002]

2. Description of the Related Art FIGS. 2A to 2D show a series of conventional manufacturing steps of an electric double layer capacitor having a coin-shaped cell case, which will be described as an example.
The cell case 1 includes a case body 1a formed in a shallow dish shape, and a cap member 1b that is airtightly covered on the case body 1a via a gasket (not shown).
In the same cell case 1, a pair of sheet-like polarizable electrodes are arranged opposite to each other with a separator sheet interposed therebetween.

In this example, two cell cases 1 are stacked and used. First, as shown in FIG. 1A, one cell case 1 is, for example, on the negative electrode surface. The cup-shaped holder 2 as a connection holder is welded by a laser or the like.

Then, as shown in FIG. 2B, after another cell case 1 is fitted in the holder 2, a laser is applied to several places on the peripheral surface of the holder 2 for welding. To do.

In this way, the two cell cases 1, 1
After being integrally laminated via the holder 2, a sleeve 3 made of a heat-shrinkable synthetic resin tube is covered and heated to shrink the sleeve 3 as shown in FIG. In this case, the sleeve 3 is attached along the peripheral surface of the cell cases 1 and 1.

Thereafter, although only one of them is shown in FIG. 3D, the lead terminals 4 are attached to the exposed electrode surfaces of the cell cases 1 and 1. In this case, the lead terminal 4 has a wide base portion 4a that is welded to the electrode surface by a laser or the like, and a front end portion 4b that is formed narrow so as to be inserted into an attachment hole formed in a mounting board (not shown). In the case where the lead terminal 4 is placed vertically with respect to the mounting substrate, each of the lead terminals 4 is oriented such that each tip 4b thereof extends in the same direction along a plane parallel to the electrode surface.

[0007]

When this electric double layer capacitor is mounted on a circuit board, it is installed vertically, that is, each electrode surface is mounted so as to be perpendicular to the circuit board. 4 is exposed. Therefore, there is a high possibility that a short circuit may occur due to contact with an adjacent component, and there is a limit to high-density mounting.

Further, since the lead terminal 4 is attached after the sleeve 3 is covered, if a sleeve covering defect is found after the terminal is attached, there is a problem that the sleeve cannot be remounted and reproduced. Such a problem can be applied to a coin type (button type) battery.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its structural feature is to have at least one coin-shaped cell case, and each electrode of the cell case. An electronic component formed by welding a lead terminal to a surface so as to extend in the same direction along a surface parallel to the electrode surface, wherein the cell case has the respective electrode surfaces attached to the electrode surface and the electrode surface. The sleeve is placed so as to cover the base of the lead terminal.

Further, according to the present invention, in manufacturing the above electronic component, a lead terminal is extended in the same direction along a plane parallel to the electrode surface of each electrode surface of at least one coin-shaped cell case. After the above welding, the sleeve is made of a heat-shrinkable synthetic resin tube in a direction parallel to the electrode surface so as to heat-shrink the cell case.

[0011]

According to the above construction, since each electrode surface and the base of the lead terminal are covered with the sleeve, there is no risk of causing a short circuit with an adjacent component when mounting on a circuit board, and therefore mounting The density can be increased.

Further, since the sleeve is covered after the terminals are attached, even if there is a sleeve covering defect, it is possible to easily reproduce the sleeve covering and improve the yield rate.

[0013]

Embodiments of the present invention will be described below with reference to FIG. 1 by taking an electric double layer capacitor as an example. Although an example of a method for manufacturing an electric double layer capacitor is illustrated in the order of steps in the figure, in the same example, as in the conventional example shown in FIG.
The target is an electric double layer capacitor formed by stacking No. 1 and therefore, the conventional process is directly followed until the laminating process.

That is, as shown in FIGS. 2 (a) and 2 (b), after two cell cases 1 and 1 are integrally laminated via a cup-shaped holder 2, in the present invention,
First, as shown in FIG. 1 (A), the cell case 1,
The base portion 4a of the lead terminal 4 is welded to each electrode surface of No. 1 by a laser or the like.

For the convenience of drawing, FIG. 1 shows only the electrode surface of one cell case 1 and the lead terminal 4 welded thereto, but the lead terminal 4 is similarly welded to the opposite electrode surface. To be done. In this case, each of the lead terminals 4 is oriented such that the tip portions 4b thereof extend in the same direction along a plane parallel to the electrode surface.

Next, as shown in FIG.
A sleeve 5 made of a heat-shrinkable synthetic resin tube is covered. In this case, the sleeve 5 is preferably covered over the entire cell cases 1 and 1 in a direction parallel to the electrode surface of the cell case 1, except for the tip portions 4b of the lead terminals 4.

Thereafter, the sleeve 5 is contracted, for example, by blowing hot air, and finally, as shown in FIG. 1C, the electrode surfaces of the cell case 1 and the base 4a of the lead terminal 4 are removed. An electric double layer capacitor covered with the sleeve 5 is obtained.

In the above embodiment, the length of the sleeve 5 before contraction is set to be slightly longer than the diameter of the cell case 1 so as to cover almost all of the cell case 1. Since the portion protruding inward is the base portion 4a of the lead terminal 4, the length of the sleeve 5 may be at least a width capable of covering the base portion 4a.

In the above embodiment, two cell cases are laminated and used, but the present invention is not limited to this and can be applied to more or one cell case. Further, it goes without saying that the present invention can be applied to a coin-type (button-type) battery in addition to the electric double layer capacitor.

[0020]

As described above, according to the present invention,
In an electronic component mounted vertically on a circuit board, a coin-shaped cell case is covered with a sleeve so as to cover each electrode surface and a base of a lead terminal attached to the electrode surface. By doing so, there is no risk of short-circuiting with adjacent parts,
Therefore, higher density mounting is possible.

Further, since the sleeve is covered after the terminals are attached, even if there is a sleeve covering defect, the sleeve covering can be easily regenerated, which contributes to the improvement of the yield rate. Is played.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a method of manufacturing an electronic component (electric double layer capacitor) according to the present invention in the order of steps.

FIG. 2 is a schematic view showing a conventional example of a method for manufacturing an electronic component (electric double layer capacitor) in the order of steps.

[Explanation of symbols]

 1 Cell Case 2 Cup Holder 4 Lead Terminal 4a Lead Terminal Base 4b Lead Terminal Tip 5 Sleeve

Claims (2)

[Claims] 1. At least one coin-shaped cell case is provided, and a lead terminal is welded to each electrode surface of the cell case so as to extend in the same direction along a surface parallel to the electrode surface. In this electronic component, the cell case is covered with a sleeve so as to cover each electrode surface of the cell case and a base portion of the lead terminal attached to the electrode surface. 2. A lead terminal is welded to each electrode surface of at least one coin-shaped cell case so as to extend in the same direction along a surface parallel to the electrode surface, and then to the cell case. A method of manufacturing an electronic component, comprising: covering a sleeve made of a heat-shrinkable synthetic resin tube in a direction parallel to the electrode surface to heat-shrink it.