CN201207335Y

CN201207335Y - High temperature capacitor

Info

Publication number: CN201207335Y
Application number: CNU200820096388XU
Authority: CN
Inventors: 蒋春强; 王刚; 王成兴; 朱强; 潘平华
Original assignee: China Zhenhua Group Xinyun Electronic Components Co Ltd
Current assignee: China Zhenhua Group Xinyun Electronic Components Co Ltd
Priority date: 2008-05-15
Filing date: 2008-05-15
Publication date: 2009-03-11
Anticipated expiration: 2018-05-15

Abstract

The utility model discloses a high-temperature capacitor, which belongs to the electronic component field and aims at providing a high-temperature capacitor which can work continuously for long time at high temperature and can bear big inverse voltage. The high-temperature capacitor is composed of a metal shell, an anode tantalum block, electrolyte, a cathode lead-out wire and an anode lead-out wire; a tantalum cathode cylinder (7) is fixed in the metal shell (8), wherein, a cathode lead-out wire (10) is welded at the bottom end of the metal shell; an anode tantalum block (5) is fixed in the tantalum cathode cylinder (7), wherein, a liner (9) is nested at one end of anode tantalum block (5), and a tantalum thread (3)is inserted at the other end of the anode tantalum block (5); the tantalum thread (3) runs through a liner (11) which is positioned over the anode tantalum block (5) and a plug (12) and is in butt joint with the anode lead-out wire (1); the electrolyte (6) is filled in the clearance between the anode tantalum block (5) and the tantalum cathode cylinder (7), the high-temperature capacitor has the advantages of high temperature resistance, reverse voltage resistance and long service life and being applicable to various circuits.

Description

High temperature capacitors

Technical field: the utility model relates to a kind of electronic component, relates in particular to a kind of capacitor.

Background technology: tantalum electrolytic capacitor mainly plays effects such as energy storage, filtering, bypass, coupling, decoupling, phase inversion, the electronic component that is absolutely necessary, and its maximum operating temperature scope is generally 125 ℃; And drilling well, survey, the ambient temperature of equipment work such as Aeronautics and Astronautics is considerably beyond 125 ℃, existing tantalum electrolytic capacitor can not satisfy the instructions for use of above-mentioned field electronic equipment.Though mineral condenser such as ceramic capacitor, glass glaze condenser can be used in more than 125 ℃ in the hot environment, but because its capacitance is too little, stream time is very short (being generally less than 30 minutes), and traditional electrolytic capacitor can not bear reverse voltage; Therefore can not replace tantalum electrolytic capacitor effect in the line.

The utility model content: at the above-mentioned defective that exists in the prior art, the utility model aim to provide a kind of can be under 200 ℃ of conditions continuous operation more than 240 hours, and can bear the high temperature capacitors of big reverse voltage in a long time.

To achieve these goals, the utility model by the following technical solutions: it comprises metal shell, anode tantalum piece, electrolyte and negative electrode and anode lead wire; The tantalum cathode tube is fixed on the bottom and is welded with in the metal shell of negative outside wire, tantalum cathode tube internal fixation has an end to be with the anode tantalum piece that liner, the other end are inserted with tantalum wire, and tantalum wire passes and docks with positive outside wire from the pad that is arranged on anode tantalum piece top, stopper; Electrolyte is filled in the gap between anode tantalum piece and the tantalum cathode tube.

Port at metal shell is fixed with insulator hermetically, and tantalum wire passes from this insulator; Described insulator by the becket that is fixed on the metal shell port, be fixed on the glass insulator in this ring, the tantalum pipe that fixedly is inserted in this glass insulator constitutes; Outer ring at stopper is provided with sealing ring, and the position corresponding to the sealing ring on the wall of metal shell is provided with the ring groove that caves inward.

Compared with the prior art, the utility model is owing to adopted technique scheme, and under different temperature, handle through twice electrochemical method, surface at anode tantalum piece and tantalum cathode tube forms dielectric oxide film, therefore capacitor not only can be in up to 200 ℃ environment continuous operation but also can bear higher reverse voltage, the useful life of having improved capacitor greatly for a long time for a long time.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Among the figure: positive outside wire 1 tantalum pipe 2 tantalum wires 3 sealing rings 4 anode tantalum pieces 5 electrolyte 6 tantalum cathode tubes 7 metal shells 8 liners 9 negative outside wires 10 pads 11 stoppers 12 beckets 13 glass insulators 14

Embodiment: the utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment:

As shown in Figure 1: negative outside wire 10 is welded on the bottom of metal shell 8, and tantalum cathode tube 7 is fixed in the metal shell 8, and the outer wall of tantalum cathode tube 7 closely contacts with the inwall of metal shell 8; One end is with the anode tantalum piece 5 that insulating cell 9, the other end fixedly be inserted with tantalum wire 3 and is arranged in the tantalum cathode tube 7, and tantalum wire 3 passes and docks with positive outside wire 1 from the insulation spacer 11 that is arranged on anode tantalum piece 5 tops, insulation stopper 12; Anode tantalum piece 5 separates by liner 9 and tantalum cathode tube 7 and forms the gap, and electrolyte 6 is filled in this gap.

In order to increase sealing, be fixed with insulator hermetically in the port of metal shell 8, tantalum wire 3 passes from this insulator; Described insulator by the becket 13 that is welded on metal shell 8 ports, be fixed on glass insulator 14 in this ring, the tantalum pipe 2 that fixedly is inserted in this glass insulator middle position constitutes.For heat insulation, be with sealing ring 4 in the outer ring of stopper 12, the position corresponding to sealing ring 4 on the outer wall of metal shell 8 applies an inside power, makes the shell wall of metal shell 8 cave inward and forms a ring groove.

Claims

1. a high temperature capacitors comprises metal shell, anode tantalum piece, electrolyte and negative electrode and anode lead wire; It is characterized in that: tantalum cathode tube (7) is fixed on the bottom and is welded with in the metal shell (8) of negative outside wire (10), tantalum cathode tube (7) internal fixation has an end to be with the anode tantalum piece (5) that liner (9), the other end are inserted with tantalum wire (3), and tantalum wire (3) passes and docks with positive outside wire (1) from the pad (11) that is arranged on anode tantalum piece (5) top, stopper (12); Electrolyte (6) is filled in the gap between anode tantalum piece (5) and the tantalum cathode tube (7).

2. high temperature capacitors according to claim 1 is characterized in that: the port at metal shell (8) is fixed with insulator hermetically, and tantalum wire (3) passes from this insulator; Described insulator by the becket (13) that is fixed on metal shell (8) port, be fixed on glass insulator (14) in this ring, the tantalum pipe (2) that fixedly is inserted in this glass insulator constitutes.

3. high temperature capacitors according to claim 1 and 2 is characterized in that: be provided with sealing ring (4) in the outer ring of stopper (12), the position corresponding to the sealing ring on the wall of metal shell (8) is provided with the ring groove that caves inward.