CN216698109U

CN216698109U - Aluminum electrolytic capacitor capable of measuring temperature

Info

Publication number: CN216698109U
Application number: CN202122989672.8U
Authority: CN
Inventors: 艾亮; 谭浩; 刘毅
Original assignee: Hunan Aihua Group Co Ltd
Current assignee: Hunan Aihua Group Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-06-07
Anticipated expiration: 2031-12-01

Abstract

The utility model provides a but aluminium electrolytic capacitor of temperature measurement, includes apron, core package and shell, and the core package passes through the apron to be sealed in the shell, and the apron is four-pin apron, is provided with temperature sensor in the space at core package center, and temperature sensor's anodal lead wire and negative pole lead wire electric connection respectively are on two supplementary feet of four-pin apron, and anodal foil strip and negative pole foil strip are led to the positive pole on the core package electric connection respectively on two electrode feet. The cover plate used by the utility model is a four-pin cover plate, the lead of the temperature sensor is directly and electrically connected to the auxiliary pin of the four-pin cover plate, and an additional opening on the four-pin cover plate is not needed to connect the lead of the temperature sensor with an external part. Compared with the existing temperature measuring capacitor, the utility model can still accurately measure the internal temperature of the capacitor, and has simple manufacturing process and lower production cost.

Description

Aluminum electrolytic capacitor capable of measuring temperature

Technical Field

The utility model relates to the technical field of aluminum electrolytic capacitors, in particular to an aluminum electrolytic capacitor capable of measuring temperature.

Background

The capacitor is one of electronic components widely used in electronic devices, and is widely applied to aspects of blocking, alternating current and alternating current, coupling, bypassing, filtering, tuning, energy conversion, control and the like in a circuit. During the working process of the capacitor, the temperature of the capacitor is increased after the capacitor is electrified due to the internal resistance of the capacitor, and the temperature is a key factor influencing the service life of the aluminum electrolytic capacitor. Therefore, the internal temperature of the aluminum electrolytic capacitor needs to be monitored in real time and data acquisition and analysis are needed, so that the safety and reliability of the whole electronic product are improved.

The utility model discloses an aluminum electrolytic capacitor capable of detecting internal temperature and a preparation method thereof, wherein the application number is CN201910711031.0, and the aluminum electrolytic capacitor capable of detecting internal temperature uses a hollow column to package a thermocouple probe, and the hollow column is inserted into a gap of a core cladding winding core, so that the air tightness of the aluminum electrolytic capacitor can be ensured, and the internal temperature of the capacitor can be accurately detected. However, the manufacturing process of the capacitor in the application is complex, the cost is high, and the anode and the cathode in the capacitor are easy to contact with the hollow column to cause short circuit.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide the aluminum electrolytic capacitor which has simple manufacturing process and lower production cost and can measure the temperature.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the aluminum electrolytic capacitor capable of measuring the temperature comprises a cover plate, a core package and a shell, wherein the core package is sealed in the shell through the cover plate; the cover plate is a four-pin cover plate, a temperature sensor is arranged in a gap at the center of the core bag, a positive lead and a negative lead of the temperature sensor are respectively and electrically connected to two auxiliary pins of the four-pin cover plate, and a positive foil guide strip and a negative foil guide strip on the core bag are respectively and electrically connected to the two electrode pins.

Preferably, the surface of the temperature sensor is wrapped with a layer of insulating plastic sheet.

In the aluminum electrolytic capacitor capable of measuring temperature, preferably, the temperature sensor is a thermistor.

Preferably, the auxiliary pin of the aluminum electrolytic capacitor capable of measuring temperature comprises a connecting terminal, a first aluminum rivet and a first washer; one end of the first aluminum rivet is welded or riveted at the bottom of the connecting terminal, the other end of the first aluminum rivet penetrates through the four-leg cover plate and then is connected with the first washer, and the first aluminum rivet and the four-leg cover plate are tightly pressed through the matching of the first washer to be in sealing connection.

Preferably, the electrode pin of the aluminum electrolytic capacitor capable of measuring temperature comprises a leading-out terminal, a second aluminum rivet and a second washer; one end of the second aluminum rivet is welded or riveted at the bottom of the leading-out terminal, the other end of the second aluminum rivet penetrates through the four-leg cover plate and then is connected with the second washer, and the second aluminum rivet and the four-leg cover plate are tightly pressed through the matching of the second washer to be in sealing connection.

Preferably, the four-pin cover plate is provided with an insulating plastic sheet, the insulating plastic sheet is fixed with the four-pin cover plate through the two electrode pins, and the insulating plastic sheet covers the two auxiliary pins.

In the aluminum electrolytic capacitor capable of measuring temperature, preferably, the insulating plastic sheet on the inner side of the auxiliary pin is provided with a through hole, and the positive lead or the negative lead of the temperature sensor penetrates through the through hole to be electrically connected with the auxiliary pin.

Preferably, the through hole is formed in the position, coinciding with the center of the four-pin cover plate, of the insulating plastic sheet, the upper end of the temperature sensor penetrates through the through hole and is led out of the positive lead and the negative lead, the positive lead and the negative lead of the temperature sensor are located between the insulating plastic sheet and the four-pin cover plate, and the positive lead and the negative lead are electrically connected with the two auxiliary pins respectively.

Preferably, the cover plate body of the four-leg cover plate comprises a resin plate and a rubber layer: the rubber layer is bonded on the resin plate, the resin plate is pressed against the waist of the shell, and the top end of the shell is sealed on the rubber layer in a curling way.

Compared with the prior art, the utility model has the advantages that: the cover plate used by the utility model is a four-pin cover plate, the lead of the temperature sensor is directly and electrically connected to the auxiliary pin of the four-pin cover plate, and an additional opening on the four-pin cover plate is not needed to connect the lead of the temperature sensor with an external part. Compared with the existing temperature measuring capacitor, the utility model can still accurately measure the internal temperature of the capacitor, and has simple manufacturing process and lower production cost.

Drawings

Fig. 1 is a schematic perspective view of an aluminum electrolytic capacitor capable of measuring temperature in example 1.

Fig. 2 is a front view of the four-legged cover plate of embodiment 1.

Fig. 3 is a bottom view of the four-legged cover plate of example 1.

Fig. 4 is a front view of the four-legged cover plate of embodiment 2.

Fig. 5 is a bottom view of the four-legged cover plate of example 2.

Description of the figures

1. A four-legged cover plate; 11. a rubber layer; 12. a resin plate; 2. a housing; 21. girdling; 3. a thermistor; 31. a positive electrode lead; 32. a negative electrode lead; 4. a PP plastic sheet; 41. a through hole; 5. an auxiliary foot; 51. a connection terminal; 52. a first aluminum rivet; 53. a first washer; 6. an electrode pin; 61. a lead-out terminal; 62. a second aluminum rivet; 63. and (5) second washer.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the utility model is not limited to the specific embodiments below.

It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1, the aluminum electrolytic capacitor capable of measuring temperature in this embodiment includes a four-pin cover plate 1, a core package and a housing 2, the core package is sealed in the housing 2 through the four-pin cover plate 1, the core package is wound, a gap is naturally formed at the center of the core package after winding, a temperature sensor is arranged in the gap at the center of the core package, the temperature sensor used in this embodiment is a thermistor 3, the positive lead and the negative lead of the thermistor 3 are respectively and electrically connected to two auxiliary pins 5 of the four-pin cover plate 1, no hole needs to be formed in the four-pin cover plate 1, and therefore, the air tightness can be ensured, and the original hollow column is also omitted. The positive electrode foil guide strip and the negative electrode foil guide strip on the core bag are respectively and electrically connected to the two electrode pins 6.

As shown in fig. 1 and 2, the cover body of the four-leg cover 1 comprises a resin plate 12 and a rubber layer 11, the rubber layer 11 is adhered on the resin plate 12, the resin plate 12 is pressed against the beam waist 21 of the housing 2, and the top end of the housing 2 is sealed on the rubber layer 11 by crimping, so that the cover 1 is sealed with the housing 2.

As shown in fig. 2 and 3, in the present embodiment, the electrode pin 6 includes a positive electrode pin and a negative electrode pin, and the positive electrode pin and the negative electrode pin have the same composition structure and both include a lead-out terminal 61, a second aluminum rivet 62 and a second washer 63; one end of the second aluminum rivet 62 is riveted to the bottom of the leading-out terminal 61, the other end of the second aluminum rivet passes through the four-pin cover plate 1 and then continues to pass through the PP plastic sheet 4 arranged below the auxiliary pin 5, and then the second aluminum rivet 62 is hermetically connected with the cover plate 1 through the matching and pressing of the second washer 63, and the PP plastic sheet 4 is fixed with the four-pin cover plate 1. In this embodiment, the auxiliary foot 5 includes a connection terminal 51, a first aluminum rivet 52 and a first washer 53, one end of the first aluminum rivet 52 is riveted to the bottom of the connection terminal 51, and the other end of the first aluminum rivet 52 is pressed by the first washer 53 after penetrating through the four-foot cover plate 1, so that the first aluminum rivet 52 is hermetically connected with the four-foot cover plate 1. In this embodiment, the PP plastic sheets 4 at the inner sides of the two auxiliary pins 5 are respectively provided with through holes 41, and the positive lead 31 and the negative lead 32 of the thermistor 3 respectively penetrate through the two through holes 41 and then are electrically connected with the auxiliary pins 5.

Adopt PP plastic sheet 4 to keep apart supplementary foot 5 and electrode foot 6 in this embodiment, after electrode foot 6 riveted positive pole foil strip and negative pole foil strip, PP plastic sheet 4 can separate positive pole foil strip and negative pole foil strip and supplementary foot 5, consequently thermistor 3's anodal lead 31 and negative pole lead 32 can not take place the short circuit because of contacting anodal foil strip and negative pole foil strip and leading the junction of foil strip and supplementary foot 5 and take place the short circuit

In this embodiment, the surface of the thermistor 3 is wrapped with a layer of PP plastic film, which can prevent the thermistor 3 from being conducted with the positive electrode foil or the negative electrode foil of the core package, thereby preventing the capacitor from short circuit.

In the embodiment, the lead of the thermistor 3 is directly and electrically connected to the auxiliary pin 5 of the four-pin cover plate 1, and no additional opening is needed on the four-pin cover plate 1 to connect the lead of the thermistor 3 with an external part. Compared with the existing temperature measuring capacitor, the capacitor in the embodiment can still accurately measure the internal temperature of the capacitor, and meanwhile, the manufacturing process is simple, and the production cost is low.

Example 2

As shown in fig. 4 and 5, the aluminum electrolytic capacitor capable of measuring temperature in this embodiment is different from embodiment 1 in that the PP plastic sheet 4 is provided with a through hole 41 at a position coinciding with the center of the four-pin cover plate 1 instead of the through hole 41 at a position inside the auxiliary pin 5, the upper end of the thermistor 3 is inserted through the through hole 41 and the positive lead 31 and the negative lead 32 are led out, the positive lead 31 and the negative lead 32 of the thermistor 3 are located between the insulating plastic sheet 4 and the four-pin cover plate 1, the positive lead 31 and the negative lead 32 are electrically connected to the two auxiliary pins 5, respectively, and the connection mode is such that the whole positive lead 31 and the whole negative lead 32 of the thermistor 3 are separated from the positive foil strip and the negative foil strip.

Claims

1. The aluminum electrolytic capacitor capable of measuring the temperature comprises a cover plate, a core package and a shell, wherein the core package is sealed in the shell through the cover plate, and the aluminum electrolytic capacitor capable of measuring the temperature is characterized in that: the cover plate is a four-pin cover plate, a temperature sensor is arranged in a gap at the center of the core bag, a positive lead and a negative lead of the temperature sensor are respectively and electrically connected to two auxiliary pins of the four-pin cover plate, and a positive foil guide strip and a negative foil guide strip on the core bag are respectively and electrically connected to the two electrode pins.

2. The aluminum electrolytic capacitor capable of measuring temperature according to claim 1, wherein: and the surface of the temperature sensor is wrapped with a layer of insulating plastic film.

3. The aluminum electrolytic capacitor capable of measuring temperature according to claim 1, wherein: the temperature sensor is a thermistor.

4. The aluminum electrolytic capacitor capable of measuring temperature according to claim 1, wherein: the auxiliary foot comprises a connecting terminal, a first aluminum rivet and a first washer; one end of the first aluminum rivet is welded or riveted at the bottom of the connecting terminal, the other end of the first aluminum rivet penetrates through the four-leg cover plate and then is connected with the first washer, and the first aluminum rivet and the four-leg cover plate are tightly pressed through the matching of the first washer to be in sealing connection.

5. The aluminum electrolytic capacitor capable of measuring temperature according to claim 1, wherein: the electrode pin comprises an extraction terminal, a second aluminum rivet and a second washer; one end of the second aluminum rivet is welded or riveted at the bottom of the leading-out terminal, the other end of the second aluminum rivet penetrates through the four-leg cover plate and then is connected with the second washer, and the second aluminum rivet and the four-leg cover plate are tightly pressed through the matching of the second washer to be connected in a sealing mode.

6. The aluminum electrolytic capacitor capable of measuring temperature according to claim 1, wherein: the four-pin cover plate is provided with an insulating plastic sheet, the insulating plastic sheet is fixed with the four-pin cover plate through the two electrode pins, and the insulating plastic sheet covers the two auxiliary pins.

7. The aluminum electrolytic capacitor capable of measuring temperature according to claim 6, wherein: and a through hole is formed in the insulating plastic sheet on the inner side of the auxiliary pin, and a positive lead or a negative lead of the temperature sensor penetrates through the through hole to be electrically connected with the auxiliary pin.

8. The aluminum electrolytic capacitor capable of measuring temperature according to claim 6, wherein: the position on the insulating plastic sheet coinciding with the center of the four-pin cover plate is provided with a through hole, the upper end of the temperature sensor penetrates through the through hole and leads out a positive lead and a negative lead, the positive lead and the negative lead of the temperature sensor are positioned between the insulating plastic sheet and the four-pin cover plate, and the positive lead and the negative lead are respectively electrically connected with the two auxiliary pins.

9. The aluminum electrolytic capacitor capable of measuring temperature according to claim 1, wherein: the cover plate body of the four-foot cover plate comprises a resin plate and a rubber layer: the rubber layer is bonded on the resin plate, the resin plate is pressed against the waist of the shell, and the top end of the shell is sealed on the rubber layer in a curling way.