CN2482202Y

CN2482202Y - Capacitor element

Info

Publication number: CN2482202Y
Application number: CN 01217910
Authority: CN
Inventors: 冯申荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-15
Filing date: 2001-03-15
Publication date: 2002-03-13
Anticipated expiration: 2011-03-15

Abstract

The utility model discloses a metallized organic film capacitor element. The metallized organic film capacitor element is wound by an organic film, a metal layer as a pole plate and an insulating edge are arranged on the inner surface of two layers of organic films, so that one side with the metal layer is protruded at two ends of the capacitor element after the layers of organic films are wound, wherein the metal layer on the inner surface of the organic film is formed by connecting through a metallized fuse wire by a plurality of metal layer units. The capacitor element of the utility model can not happen the accidents such as casing burst, fire, etc., thereby the utility model is suitable for the capacitors such as a power capacitor, a power electronic capacitor, a motor capacitor, etc.

Description

A kind of capacitor element

The utility model relates to a kind of metallized organic film capacitor element.Be applicable on the capacitors such as power capacitor, power electronic capacitor and motor capacitor.

The metallized organic film capacitor element that uses in power capacitor and the power electronic capacitor, it is to evaporate layer of metal film as pole plate by the vacuum evaporation mode earlier on organic film, reeling with the two-layer organic film that has metal film forms again.When insulation breakdown appears in this capacitor element, the stored energy of the element that is in parallel with it can discharge to breakdown point, moment forms the high-temperature plasma district, the metal level of breakdown point is dispersed, only consume very little energy and just can form new insulation layer, thereby make its " self-healing ", recover operate as normal.But this " self-healing " is limited, if the insulating material of capacitor element is second-rate, thermal aging blocked up as the metal level of pole plate or insulating material is serious, the capital makes the metallized organic film capacitor element continuity puncture occur, self-healing was lost efficacy, and becomes permanent fault.When this situation occurring because there is certain resistance in the fault point, fault current by the time can produce high temperature, make organic film gasification, adhesion, and produce a large amount of gases.Thereby the gas pressure in the capacitor casing is constantly raise.When serious, capacitor casing explosion, accident such as on fire can appear.

The purpose of this utility model is to provide a kind of capacitor element.Use the capacitor of this element, housing explosion, accident such as on fire can not occur.

For achieving the above object, the utility model adopts following technical solution:

A kind of scheme of the present utility model is, this capacitor element is to be reeled by two-layer organic film to form, have on the inner surface of this two-layer organic film as the metal level and the insulation of pole plate and stay the limit, so that two-layer organic film has the two ends of one side protrusion of metal level at capacitor element after reeling.Be characterized in that the metal level on one deck organic film inner surface wherein is to be formed by connecting by the metallization fuse by some unit metal layers.

Another kind of scheme of the present utility model is, this capacitor element is to be reeled by two-layer organic film to form, have on the inner surface of this two-layer organic film as the metal level and the insulation of pole plate and stay the limit, so that two-layer organic film has the two ends of one side protrusion of metal level at capacitor element after reeling.Be characterized in that the metal level on the two-layer organic film inner surface all is to be formed by connecting by the metallization fuse by some unit metal layers.

Adopt such scheme, have the following advantages:

Because the metal level as pole plate on the organic film inner surface of capacitor element of the present utility model is to be formed by connecting by the metallization fuse by some unit metal layers, if insulation breakdown, breakdown point is only on a unit metal layer, in case " self-healing " lost efficacy, the stored energy of element or the element that is in parallel with it at first discharges to the fault point, discharge energy is enough to make the metallization fuse that leads to the fault point to disconnect, the unit metal layer of excision fault point, and element recovers operate as normal.Organic film gasification, adhesion can not occur, can not produce gas, thereby prevent the generation of capacitor casing explosion, accident such as on fire.

Below in conjunction with accompanying drawing the utility model is described in further detail:

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

Fig. 2 is a wound capacitor element view of the present utility model;

Fig. 3 is the A-A cross-sectional schematic of Fig. 2;

Fig. 4 is that the unit metal layer is foursquare capacitor element deployed condition schematic diagram;

Fig. 5 is that the unit metal layer is hexagonal capacitor element deployed condition schematic diagram;

Fig. 6 is that the unit metal layer is the capacitor element deployed condition schematic diagram of parallelogram;

Fig. 7 is that the unit metal layer is the capacitor element deployed condition schematic diagram of S shape;

Fig. 8 is by two sections series capacitors element deployed condition schematic diagrames;

Fig. 9 is by three sections series capacitors element deployed condition schematic diagrames;

Figure 10 is the B-B cross-sectional schematic of Fig. 9.

See Fig. 1, Fig. 2 and Fig. 3, capacitor element of the present utility model is reeled by two-layer organic film 1 and is formed.Adopt the vacuum evaporation technology evaporation one deck very thin metal level 2 to be arranged on two-layer organic film 1 inner surface wherein as pole plate.This metal level can be silver, zinc, aluminum alloy materials, also can use zinc, aluminum alloy materials.Wherein, the metal level 2 on one deck organic film 1 is to be the metal level unit 2-1 of proper alignment and to be constituted by some, is connected by metallization fuse 3 between the adjacent metal layer unit 2-1.The inner surface of two-layer organic film 1 is processed with insulation on one side and stays limit 4.Before the coiling, there is the two-layer organic film 1 of metal level 2 to be staggered pile together the inner surface evaporation, promptly having insulation and staying the one side on limit 4 to be in the left and right both sides of two-layer organic film 1 respectively, the two ends at capacitor element are protruded on the one side that has metal level 2 after making two-layer organic film 1 reel.

As Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, capacitor element of the present utility model, both can be that the combinations thereof form is that metal level 2 on one deck organic film 1 is integral type, the metal level 2 on another layer organic film 1 be to be formed by connecting by metallization fuse 3 by number of metal layer unit 2-1.Also can be that metal level 2 on the two-layer organic film 1 all is to connect 3 by number of metal layer unit 2-1 by the metallization fuse to connect and form.Said metal level unit 2-1 can be any geometric figure.Fig. 4, Fig. 5, Fig. 6 and Fig. 7 have shown the pole plate compound mode of metal level unit 2-1 for square, hexagon, parallelogram and S shape respectively.

Fig. 8 shows is in the middle of wherein one deck organic film 1 inner surface metal level 2 a vertical insulating tape 5 to be arranged, and is connected in series in order to form two sections, makes it form inner two capacitances in series connections.Like this, operating voltage is doubled.This version only needs to increase the quantity of vertical insulating tape 5, just can make element internal form the capacitances in series connection of even number.

Fig. 9 and Figure 10 show is in the middle of the metal level 2 on two-layer organic film 1 inner surface a vertical insulating tape 5 to be arranged all, is connected in series in order to form three sections, makes it form inner three capacitances in series connections, and operating voltage can improve two times.

According to the needs of different operating voltage, can on the metal level 2 of two-layer organic film 1 inner surface, form many vertical insulating tapes 5, realize being connected in series of a plurality of electric capacity of element internal.

Claims

1. capacitor element, it is reeled by two-layer organic film (1) and forms, there are metal level (2) and insulation to stay limit (4) on the inner surface of this two-layer organic film as pole plate, so that one side protrusion that two-layer organic film (1) has metal level (2) after reeling at the two ends of capacitor element, is characterized in that the metal level (2) on one deck organic film (1) inner surface wherein is to be formed by connecting by metallization fuse (3) by number of metal layer unit (2-1).

2. capacitor element according to claim 1 is characterized in that the metal level (2) on another layer organic film (1) inner surface also is to be formed by connecting by metallization fuse (3) by number of metal layer unit (2-1).

3. capacitor element according to claim 2 is characterized in that in the middle of the metal level (2) on one deck organic film (1) inner surface vertical insulating tape (5) being arranged.

4. capacitor element according to claim 2 is characterized in that in the middle of the metal level (2) on two-layer organic film (1) inner surface vertical insulating tape (5) being arranged all.