JPS6112672Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the structure of an electrolytic capacitor equipped with an explosion-proof mechanism.

[Conventional technology]

Normally, when a reverse voltage, continuous overvoltage, or abnormal pulse is applied to an electrolytic capacitor, an excessive current flows through the electrolyte, causing electrolysis, generating gas, and increasing the internal pressure of the electrolytic capacitor, resulting in an explosion. Destroy it with. The internal pressure in this explosion is about 25 to 30 kg/cm ² , and because it is dangerous to explode, an explosion-proof mechanism is provided that releases the internal gas outside the case (container) when a predetermined internal pressure is reached.

[Problem that the invention attempts to solve]

As shown in FIGS. 3 and 4, for example, this explosion-proof mechanism has a thin wall 2 formed on the bottom 8 of a container 1 made of aluminum, and when the internal pressure exceeds a certain value, this thin wall 2 ruptures. Although the structure is such that the internal gas is released, when the gas is released, the internal capacitor element 3 also jumps out of the container 1 at the same time, which is dangerous and has drawbacks such as polluting the surrounding area.

[Means for solving problems]

However, the present invention was devised to solve the above problems, and specifically, a plurality of ribs protruding higher than the height of the bottom of the container are provided inside the container with a thin wall portion. The present invention provides an electrolytic capacitor in which the ribs are integrally formed radially from the center to the periphery of the bottom and the upper ends of the ribs bite into the capacitor element.

〔Example〕

Embodiments of the present invention are shown below in Figures 1 and 2.
This will be explained based on the diagram. In FIG. 1, reference numeral 1 denotes a bottomed cylindrical container made of aluminum with an opening on one side, and a capacitor element 3 is housed inside the container 1. The lead-out lead 9 of the capacitor element 3 is connected to a terminal plate 5 for external connection, which is embedded in a terminal plate 4 formed by a separator plate and a sealing plate, which is attached to the opening edge of the container 1 by caulking. .

Furthermore, when forming the container 1, as shown in FIG. A plurality of ribs 7 protruding slightly higher than the height of the bottom portion 8 are integrally formed radially from approximately the center of the container 1 toward the periphery.

With the above configuration, when assembling an electrolytic capacitor, the capacitor element 3 in the container 1 is placed on the rib 7, and the terminal plate 4 and the rib 7 are connected by attaching the terminal plate 4 forming the sealing part. It is held stably between.

〔effect〕

As described above, the present invention provides a thin wall portion 6 at the bottom 8 of the bottomed cylindrical container 1, and also integrally forms a plurality of ribs 7 radially on the thin wall portion 6. The element 3 is held on the rib 7, but when it is pushed into the terminal plate 4, the rib 7 is slightly protruded inward from the bottom 8 than the surface of the bottom 8, so that the upper end of the element 3 is held on the rib 7. can be made to bite into the capacitor element 3, and as a result, stability against vibration can be improved.

However, even if the electrolytic solution undergoes electrolysis for some reason, gas is generated, and the pressure inside the container 1 increases, if this exceeds a predetermined value, the thin wall portion 6 ruptures and the gas is transferred to the container 1. Can be released outside. At this time, since the capacitor element 3 is held by the rib 7, it does not jump out to the outside.
This has the effect of not only maintaining safety but also not contaminating the surrounding area.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of the main part of an electrolytic capacitor showing an embodiment of the present invention, Fig. 2 is a cutaway plan view of the main part, Fig. 3 is a cutaway side view of the main part of a conventional electrolytic capacitor, and Fig. 4 is also a cutaway plan view of the main part. In the figure, 1 is a container, 3 is a capacitor element, 4 is a terminal plate, 6 is a thin wall portion, 7 is a rib, and 8 is the bottom of the container.

Claims (1)

[Scope of utility model registration request] In an electrolytic capacitor in which a capacitor element 3 is assembled together with a terminal plate 4 in a bottomed cylindrical container 1 with an opening on one side, a thin wall portion 6 is formed on the bottom 8 of the container 1, and a bottom 8 is formed inside the container 1. A plurality of ribs 7 protruding higher than the height of the container 1 are formed integrally with the bottom 8 radially from the center of the container 1 toward the periphery,
An electrolytic capacitor characterized in that the upper end of the rib 7 is wedged into the capacitor element 3.