Self healing capacitor with security protection technology

Abstract

The invention discloses a self healing capacitor with security protection technology. The self healing capacitor with security protection technology comprises a shell body made from flame retardant plastics or metal; the inner cavity of the shell body is embedded with a capacitance core formed by winding a metallized polypropylene film in a sealing way and a flame retardant epoxide resin body is filled between the capacitance core and the inner cavity of the shell body; a first electric contact and a second electric contact are correspondingly manufactured at an upper end head and a lower end head of the capacitance core; the second electric contact is electrically connected with an electric current fuse which is electrically connected with a second leading-out end line; and the first electric contact is electrically connected with a first leading-out end line. The selective match of the electric current fuse is precisely configured with capacitance current level and the electric current fuse can keep normal work in product test and normal operation and can blow out immediately to cut off the power supply loop of the capacitance core due to occurrence of severe self-healing discharging in the operation of the capacitance core or due to the occurrence of instant impact current at the thermal breakdown moment, thereby avoiding product explosion and accidents as a result of the enlargement of a fault point.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a self-healing capacitor with safety protection technology. Background technique [0002] Capacitor products are widely used, but the structure of many existing capacitors is roughly the same, that is, they lack protection against excessive fault current, as discussed below: [0003] Applicant's technical one, such as figure 1 , Figure 1a As shown, the capacitor product is assembled from metallized polypropylene film, flame-retardant or non-flame-retardant epoxy resin, flame-retardant or non-flame-retardant plastic, metal shell, and lead-out terminals, without protective devices; it is called P0 without special Fault protection capacitor; because this product has no safety protection device, it is no longer suitable for the production and living environment with the theme of safety, environmental protection and green. [0004] Re-applicant's technology II, such as image ...

AI Technical Summary

Problems solved by technology

The capacitor uses a temperature protector as a protection device, and the cost of raw materials and manufacturing costs are relatively low. However, after many tests, it is believed that the capacitor uses a temperature protector as a protection device. Protected, that is to say, the temperature protector will protect when the internal temperature of the capacitor exceeds the rated temperature of the temperature protector. It is difficult to find any position of the temperature protector in the capacitor shell, and the capacitor will burst when it is heated. When it is used, it does not necessarily correspond to the position where the thermal protector is placed. Although it is more economical, it is difficult to play a protective role.

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