CN201918260U

CN201918260U - Self-protection thin-film capacitor provided with temperature control switch

Info

Publication number: CN201918260U
Application number: CN2010206809394U
Authority: CN
Inventors: 胡枝清
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-08-03
Anticipated expiration: 2020-12-27

Abstract

The utility model discloses a self-protection thin-film capacitor provided with a temperature control switch, which comprises a shell and a capacitor core body which is formed by winding a metalized polypropylene thin film and is embedded in an inner cavity of the shell in a sealed manner, wherein a flame-retarded epoxy resin body is filled between the capacitor core body and the inner cavity of the shell; and the upper end and the lower end of the capacitor core body are correspondingly provided with a first electric contact and a second electric contact. The self-protection thin-film capacitor is characterized in that the first electric contact is electrically connected with a first leading-out end wire; the second electric contact is electrically connected with a current fuse; the current fuse is connected with the temperature control switch in series and is then electrically connected with a second leading-out end wire. When the temperature of the capacitor exceeds a temperature control temperature, a circuit is cut off and the capacitor is enabled to stop working; and when the temperature of the capacitor is lower than the highest use temperature, the temperature control switch is reset and is closed, and the capacitor can work. When the capacitor core body produces serious self-healing discharge during operation or at the moment of thermal breakdown of the capacitor core body, the current fuse can be fused immediately so as to cut off a power supply loop of the capacitor core body, so product explosion and the occurrence of accidents caused by fault point increase are avoided. The self-protection thin-film capacitor has dual protection effects.

Description

The self-shield thin-film capacitor that has temperature detect switch (TDS)

Technical field:

The utility model relates to a kind of thin-film capacitor, especially belongs to a kind of self-shield thin-film capacitor that has temperature detect switch (TDS).

Background technology:

Its application of capacitor product is comparatively extensive, but existing numerous its structure of capacitor is roughly comparatively identical, promptly lacks protection to fault current is excessive.

Summary of the invention:

The self-shield thin-film capacitor that has temperature detect switch (TDS) that the purpose of this utility model is to provide a kind of low cost of manufacture, technology is simple, easy to operate, movement response is quick, protection speed reaches energy-conserving and environment-protective soon.

The purpose of this utility model is to realize like this, the described self-shield thin-film capacitor that has temperature detect switch (TDS), comprise that housing and housing bore seal are embedded with an electric capacity core body of being reeled and being formed by metallized polypropylene film, are filled with the fire retarding epoxide resin body between this electric capacity core body and the housing inner chamber; Electric capacity core body two ends correspondence up and down is shaped on first electric contact and second electric contact, and its design feature is that the first electric contact electricity is connected to first leading-out end line; The second electric contact electricity is connected to the electric current fuse, is electrically connected second leading-out end line behind the electric current fuse serial connection temperature detect switch (TDS).

Advantage of the present utility model: compared with prior art, the housing bore seal that the utility model adopts is embedded with an electric capacity core body of being reeled and being formed by metallized polypropylene film, and is filled with the fire retarding epoxide resin body between this electric capacity core body and the housing inner chamber; Electric capacity core body up and down two ends correspondence is shaped on first electric contact and second electric contact, and the second electric contact electricity is connected to electric current fuse and temperature detect switch (TDS), and this electric current fuse and temperature detect switch (TDS) electricity are connected to second leading-out end line; Correspondingly, the first electric contact electricity is connected to first leading-out end line.Adopt the electric current fuse and the temperature detect switch (TDS) of microstructure to protect; the apolegamy of electric current fuse is accurately to dispose with the big or small of capacity current; temperature detect switch (TDS) can be determined the highest serviceability temperature condition according to the characteristic and the serviceability temperature of capacitor; surpass this serviceability temperature, temperature detect switch (TDS) cut-out circuit; capacitor is not worked; be lower than the conducting that resets of the highest serviceability temperature temperature detect switch (TDS), capacitor can be worked.The electric current fuse can keep operate as normal when product test and normal operation, serious self-healing discharge takes place or moment during in thermal breakdown in when operation in the electric capacity core body,, the generation of the impulse current of moment, electric current fuse cut off the current supply circuit of described electric capacity core body because can fusing immediately.Thereby avoid the fault point to increase and the generation of blast of generation product and accident; It is destroyed to insulate when break down in product inside, and the snap action that electric current increases plays a protective role.The utlity model has the duplicate protection effect.

Description of drawings:

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

Among the figure: housing 1, the first leading-out end line 2, the second leading-out end line 21, electric capacity core body 3, the first electric contacts 31, the second electric contacts 32, electric current fuse 4, epoxy resin body 5, temperature detect switch (TDS) 6.

Embodiment:

Below in conjunction with accompanying drawing and example, structure of the present utility model and operation principle are elaborated:

As shown in Figure 1, the self-shield thin-film capacitor that has temperature detect switch (TDS) described in the utility model, comprise by flame retardant plastics or metal housing 1, wherein: housing 1 bore seal is embedded with an electric capacity core body 3 of being reeled and being formed by metallized polypropylene film, and is filled with fire retarding epoxide resin body 5 between this electric capacity core body 3 and housing 1 inner chamber; The electric capacity core body about in the of 3 the two ends correspondence be shaped on first electric contact 31 and second electric contact 32, second electric contact, 32 electricity are connected to electric current fuse 4, and be electrically connected with second leading-out end line 21 behind these electric current fuse 4 serial connection temperature detect switch (TDS)s 6, correspondingly, first electric contact, 31 electricity are connected to first leading-out end line 2; The effect of temperature detect switch (TDS) 6 is that the temperature of capacitor is in conducting state in operating temperature range the time, in case temperature is higher than operating temperature range, disconnects immediately, and capacitor is not worked.

Claims

1. self-shield thin-film capacitor that has temperature detect switch (TDS), comprise that housing (1) and housing (1) bore seal are embedded with an electric capacity core body (3) of being reeled and being formed by metallized polypropylene film, are filled with fire retarding epoxide resin body (5) between this electric capacity core body (3) and housing (1) inner chamber; Electric capacity core body (3) two ends correspondence up and down is shaped on first electric contact (31) and second electric contact (32), it is characterized in that: first electric contact (31) electricity is connected to first leading-out end line (2); Second electric contact (32) electricity is connected to electric current fuse (4), and electric current fuse (4) serial connection temperature detect switch (TDS) (6) back is electrically connected second leading-out end line (21).