CN107527735A

CN107527735A - The explosion-proof method of capacitor

Info

Publication number: CN107527735A
Application number: CN201710754408.1A
Authority: CN
Inventors: 仲杏英
Original assignee: 仲杏英
Current assignee: Zhejiang Shuangfeng Electric Co., Ltd
Priority date: 2015-08-07
Filing date: 2015-08-07
Publication date: 2017-12-29
Anticipated expiration: 2035-08-07
Also published as: CN107527735B; CN105575659A; CN105575659B

Abstract

The present invention provides a kind of explosion-proof method of capacitor, and the capacitor includes shell, inner core；The shell is provided with two electrodes, and described two electrodes are electrically connected with respectively at an electrode surface of the inner core；Wherein, at least one electrode is then connected to the electrode surface after concatenating a thermal overload relay；The thermal overload relay has the capsul of heat conduction, and thermal overload relay is arranged in a sealed regenerator container, and the sealed regenerator container is located in the inner core, and its storage inside has heat-storage agent.The noinductive capacitor can prevent internal temperature from drastically raising, and be easy to interrupt open circuit in temperature elevation process, to prevent capacitor from exploding.

Description

The explosion-proof method of capacitor

The application refers to the divisional application that application number 201510478329.3 is noinductive capacitor.

Technical field

The present invention relates to power electronic component field, is a kind of capacitor especially.

Background technology

Capacitor is a kind of conventional electronics or electrical device, in use, such as runs into circuit overloads situation, is held Easily breakdown is burnt, and during electric capacity breakdown, internal current increased dramatically, within the extremely short time, the temperature and pressure of capacitor internal Power may exceed critical value, and within the short time, common protection switch is difficult to rapid action reply, it is impossible to reliably prevents Capacitor explodes.

The content of the invention

In view of the above-mentioned problems, it is an object of the invention to provide a kind of noinductive capacitor, the noinductive capacitor can prevent Internal temperature drastically raises, and is easy to interrupt open circuit in temperature elevation process, to prevent capacitor from exploding.

Technical scheme is used by the present invention realizes technical purpose：The noinductive capacitor includes shell, inner core；It is described outer Shell is provided with two electrodes, and described two electrodes are electrically connected with respectively at an electrode surface of the inner core；Wherein, at least One electrode is then connected to the electrode surface after concatenating a thermal overload relay；The thermal overload relay has the close of heat conduction Capsule, and thermal overload relay is arranged in a sealed regenerator container, the sealed regenerator container is located in the inner core, its Storage inside has heat-storage agent.

Preferably, the shell of the noinductive capacitor is cylindrical shell, the sealed regenerator container is in the form of a column, along outside described The axis extension of shell；The inner core is rolled as standard shaft using the sealed regenerator container by electric capacity paper and formed.

Preferably, the sealed regenerator container runs through the shell of the capacitor, and the sealed regenerator container is along axis Axis hole is formed with, the interlayer local between its axis hole wall and periphery wall forms thermal, and is filled with heat-storage agent；And the thermal overload Relay is annular in shape, in the thermal；The middle part of the axis hole forms the through hole for extending transversely through thermal, the through hole Hole wall in the thermal heat-storage agent formed isolation；And the end envelope of the through hole has intensity to be less than the close of the shell Sealing.

Preferably, the heat storage container is made up of thermal conductive ceramic or heat conduction glass.

The beneficial effects of the present invention are：The noinductive capacitor is when by heavy current impact, causing inner core to puncture, short circuit Amount of heat caused by electric current is absorbed by the heat-storage agent in the sealed regenerator container, for the phase transformation energy consumption of heat-storage agent, Buffered so that the temperature of capacitor internal rises, make capacitor be difficult to be rapidly reached blast critical-temperature, so that close Thermal overload relay in envelope heat storage container has sufficient time to disconnect inner core circuit, further because of inner core so as to avoid Generate heat and cause capacitor to explode.

Brief description of the drawings

Fig. 1 is the structural representation of this noinductive capacitor embodiment one.

Fig. 2 is the structural representation of this noinductive capacitor embodiment two.

Embodiment

The present invention is further described with reference to the accompanying drawings and examples：

In the embodiment one shown in Fig. 1, the noinductive capacitor includes shell 1, inner core 2；The shell 1 is provided with two Electrode 3, described two electrodes 3 are electrically connected with respectively at an electrode surface of the inner core 2；One of electrode concatenation one The electrode surface is then connected to after individual thermal overload relay 4；The thermal overload relay 4 has the capsul of heat conduction, and hot mistake Carry relay 4 to be arranged in a sealed regenerator container 5, the sealed regenerator container 5 passes through the inner core 2, its storage inside There is heat-storage agent.

The solid-liquid body phase height of the heat-storage agent is 60 DEG C~90 DEG C；Within the range, electric capacity mistake can be determined substantially Carry, and be still insufficient to allow capacitor to explode.

Above-mentioned noinductive capacitor, the shell 1 of the noinductive capacitor is cylindrical shell, and the sealed regenerator container 5 is in post Shape, extend along the axis of the shell 1；The inner core 2 is rolled for standard shaft with the sealed regenerator container 5 by electric capacity paper and formed； So that the space of enclosure obtains good utilization, and allow produced by sealed regenerator container 5 efficiently absorbs inner core 2 Heat.

Above-mentioned noinductive capacitor, the heat storage container 5 are made up of thermal conductive ceramic or heat conduction glass.

Above-mentioned noinductive capacitor is by heavy current impact, when causing the breakdown of inner core 2, big calorimetric caused by short circuit current Amount is absorbed by the heat-storage agent in the sealed regenerator container 5, for the phase transformation energy consumption of heat-storage agent, so that capacitor internal Temperature, which rises, to be buffered, and makes capacitor be difficult to be rapidly reached blast critical-temperature, so that the hot mistake in sealed regenerator container 5 Carry relay 4 to have sufficient time to disconnect inner core circuit, so as to avoid causing capacitor because of the further heating of inner core Blast.

Fig. 2 show the embodiment two of this noinductive capacitor, and the difference of itself and embodiment one is：The sealing stores Heat container 6 runs through the shell 1 of the capacitor, and the sealed regenerator container 5 is formed with axis hole 50 along axis, its axis hole wall and periphery Sandwiched area between wall forms thermal, and is filled with heat-storage agent；And the thermal overload relay 4 is annular in shape, located at described In thermal；The middle part of the axis hole 50 forms the through hole 6 for extending transversely through thermal, and the hole wall of the through hole 6 is to the accumulation of heat The heat-storage agent of intracavitary forms isolation, i.e. through hole 6 has a hole wall, and the heat-storage agent in thermal will not be drained in through hole 6；It is and described logical The end envelope in hole 6 has the sealant that intensity is less than shell 1, for making the inner core 2 be isolated from the outside.The advantages of embodiment two It is：When explosion time still occurs in extreme cases for capacitor, due to being strength weak area at the through hole 6 so that electric capacity Device internal pressure breaks through the sealant of the through hole 6 first, and enters in the axis hole 50, so as to be rushed along the both ends of axis hole 50 Go out, it is overall to capacitor not form orientation recoil, so as to make capacitor integrally substantially static motionless, greatly reduce blast Harmfulness.

The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.

Claims

1. a kind of explosion-proof method of capacitor, the capacitor includes shell (1), inner core (2)；The shell (1) is provided with two Electrode (3), described two electrodes (3) are electrically connected with respectively at an electrode surface of the inner core (2)；It is characterized in that：Its In, at least one electrode is then connected to the electrode surface after concatenating a thermal overload relay；The thermal overload relay (4) Capsul with heat conduction, and thermal overload relay (4) is arranged in a sealed regenerator container (5), the sealed regenerator holds Device (5) is located in the inner core (2), and its storage inside has heat-storage agent；

The sealed regenerator container (5) runs through the shell (1) of the capacitor, and the sealed regenerator container (5) is formed with along axis Axis hole (50), the interlayer local between its axis hole wall and periphery wall forms thermal, and is filled with heat-storage agent；And the thermal overload Relay (4) annularly, in the thermal；The middle part of the axis hole (50) forms the through hole for extending transversely through thermal (6), the hole wall of the through hole (6) forms isolation to the heat-storage agent in the thermal；And the end Feng Youqiang of the through hole (6) Sealant of the degree less than the shell (1)；This method specific work process is as follows：

For the capacitor when by heavy current impact, causing inner core to puncture, amount of heat is by described close caused by short circuit current Heat-storage agent in envelope heat storage container is absorbed, for the phase transformation energy consumption of heat-storage agent, so that the temperature of capacitor internal rises To buffering, capacitor is set to be difficult to be rapidly reached blast critical-temperature, so that the thermal overload relay tool in sealed regenerator container Have sufficient time to disconnect inner core circuit, so as to avoid causing capacitor to explode because of the further heating of inner core；

When explosion time still occurs in extreme cases for capacitor, because the through hole (6) place is strength weak area so that electric capacity Device internal pressure breaks through the sealant of the through hole (6) first, and enters in the axis hole (50), so as to along axis hole (50) two End is gone out, overall to capacitor not form orientation recoil, so as to make capacitor integrally substantially static motionless, is greatly reduced Explosion hazard.

2. the explosion-proof method of capacitor according to claim 1, it is characterised in that：The shell (1) of the noinductive capacitor For cylindrical shell, the sealed regenerator container (5) is in the form of a column, and extends along the axis of the shell (1)；The inner core (2) is by electric capacity Paper is rolled for standard shaft with the sealed regenerator container (5) and formed.

3. the explosion-proof method of capacitor according to claim 1 or 2, it is characterised in that：The heat storage container (5) is by heat conduction Ceramics or heat conduction glass are formed.