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Capacitor

A technology of capacitors and electrodes, which is applied in the field of capacitors and can solve problems such as inability to connect multiple capacitors and increased resistance

Inactive Publication Date: 2008-12-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the electrodes are drawn from one (or more) strip-shaped long and narrow electrodes. Therefore, compared with the structure called end surface current collection in which the electrodes are drawn from the entire end surface of the capacitor element 25, there is a problem. The problem with a large increase in resistance
Therefore, there is a problem that multiple capacitors cannot be connected and used as a capacitor unit

Method used

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Experimental program
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no. 1 approach

[0072] Figure 1A , Figure 1B , Figure 1C It is a plan view, a front cross-sectional view, and a bottom view showing the structure of the capacitor according to the first embodiment of the present invention. like Figure 1A , Figure 1B , Figure 1C As shown, the capacitor has a capacitor element 1 . Then, a pair of positive and negative electrodes in which a polarizable electrode layer is formed on a current collector made of metal foil such as aluminum foil are rolled at positions shifted in opposite directions, with separators (all not shown) interposed therebetween and rolled. winding, thereby constituting the capacitor element 1, from the two end faces of the capacitor element 1 ( Figure 1B The top and bottom in the ) lead out the anode and cathode respectively. That is, the capacitor element 1 is constituted by exposing one ends of the positive and negative electrodes in opposite directions, respectively.

[0073] Further, the capacitor includes an aluminum bo...

no. 2 approach

[0083] The second embodiment is configured by providing two connecting portions provided on the terminal plate of the capacitor described in the first embodiment on the peripheral edge of the terminal plate. The same parts are denoted by the same symbols, and detailed descriptions thereof will be omitted, and only different parts will be described below with reference to the drawings.

[0084] Figure 4A , Figure 4B , Figure 4C It is a plan view, a front cross-sectional view, and a bottom view showing the structure of the capacitor according to the second embodiment of the present invention. 5A, 5B, and 5C are a plan view, a front sectional view, and a bottom view showing a state in which two capacitors are connected. The capacitor of the second embodiment is constituted by an example of a large-sized large-capacity (high-current) type capacitor. of.

[0085] like Figure 4A , Figure 4B , Figure 4C As shown, the capacitor has a metal case 10 and a concave portion 10...

no. 3 approach

[0090] In this embodiment, the connection portion provided on the terminal plate of the capacitor described in the first embodiment is provided in the center of the terminal plate, and the structure other than that is the same as that of the first embodiment, so the same parts are given the same , the detailed description thereof is omitted, and only the different parts will be described below with reference to the drawings.

[0091] Figure 6A , Figure 6B , Figure 6C It is a plan view, a front cross-sectional view, and a bottom view showing the structure of the capacitor according to the third embodiment of the present invention. like Figure 6BAs shown, the capacitor of the third embodiment includes a metal case 15 and a recess 15 a provided on the bottom surface of the metal case 15 . And, the electrode exposed on one end surface of the capacitor element 1 is crimped on the inner surface of the recessed part 15a, and is connected by methods such as welding by irradiat...

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Abstract

Disclosed is a capacitor wherein a capacitor element, whose positive and negative electrodes are taken out in opposite directions, is contained in a metal case. One electrode of the capacitor element is joined to the inner bottom surface of the metal case, while the other electrode is joined to the inner surface of a terminal plate which seals the opening of the metal case. The surface of the terminal plate is provided with a planar connection portion which protrudes beyond the metal case.

Description

technical field [0001] The present invention relates to capacitors for various electronic devices, backup power sources for hybrid electric vehicles and fuel cell vehicles or for regeneration, or for storage of electric power and the like. Background technique [0002] Figure 15 It is a sectional view showing the structure of a conventional capacitor. like Figure 15 As shown, a conventional capacitor has a capacitor element 25 . The capacitor element 25 is formed by winding a pair of positive and negative electrodes formed by forming a polarizable electrode layer on a current collector made of aluminum foil, staggered in opposite directions, and interposing a separator therebetween. The capacitor is connected from both end surfaces of the capacitor element 25 ( Figure 15 The top and bottom in the ) lead out the anode and cathode respectively. [0003] Further, a conventional capacitor includes a metal plate 26 connected to one electrode of the capacitor element 25, and ...

Claims

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Application Information

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IPC IPC(8): H01G9/008
CPCY02T10/7022
Inventor 三浦照久川崎周作岛本秀树井上健彦
Owner PANASONIC CORP
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