CN201336225Y

CN201336225Y - Easy-radiating electrolytic capacitor

Info

Publication number: CN201336225Y
Application number: CNU2008202059847U
Authority: CN
Inventors: 黄振彬; 郝树福; 胡用利; 郑永红; 卢永强
Original assignee: FOSHAN SANSHUI RIMING ELECTRONCS Co Ltd
Current assignee: FOSHAN SANSHUI RIMING ELECTRONCS Co Ltd
Priority date: 2008-12-24
Filing date: 2008-12-24
Publication date: 2009-10-28
Anticipated expiration: 2018-12-24

Abstract

The utility model provides an easy-radiating electrolytic capacitor, which comprises a cover board, a sleeve, a casing and a core bag. The core bag includes a positive foil, a negative foil, electrolytic paper and a leading-out piece which are rolled together; the negative foil adopts widen design, and the width thereof is 3 to 5 mm lager than that of the positive foil; and the negative foil is in directly contact with the bottom part of the casing. In the electrolytic capacitor, heat can be directly transmitted between the negative foil and the metal casing, so that not only can the spreading of the heat inside the capacitor to the outside be accelerated, to lead the inside temperature rise of the capacitor relative to the prior electrolytic capacitor to reduce 13.1 to 13.9 percent, but also the safety and the reliability are enhanced, and the durability of the capacitor is improved.

Description

A kind of electrolytic capacitor that is easy to dispel the heat

Technical field

The utility model relates to a kind of electric elements, particularly a kind of electrolytic capacitor that is easy to dispel the heat.

Background technology

At present, the core bag of conventional canopy-type aluminium electrolytic capacitor is reeled by cathode foil, anode foil, electrolytic paper and lead-out tablet and is made, wherein the width of cathode foil and anode foil is identical, the width of electrolytic paper is wideer than positive and negative electrode paper tinsel, during coiling, and the alignment of positive and negative electrode paper tinsel, the position is greatly about the central authorities of electrolytic paper, so after making the core bag, the two ends of core bag have only the electrolytic paper parcel, do not have positive and negative electrode paper tinsel parcel.The heat that the job contract of the core of the electrolytic capacitor of this structure produces when doing spreads to the external world by two kinds of approach: the one, pass to the inwall of aluminum hull by the air dielectric of product inside; The 2nd, by contacting of electrolytic paper and aluminum hull bottom heat directly passed to shell at the bottom of.But the efficient of these two kinds of heat transferred modes is all very low, can not satisfy the heat transferred requirement in the aluminum hull preferably.If anode foil is directly contacted with the aluminum hull bottom, by intermetallic heat delivered, heat transfer efficiency then can obviously improve.

The utility model content

The shortcoming that the purpose of this utility model is to overcome prior art provides a kind of simple and reasonable for structure with not enough, can effectively improve the electrolytic capacitor that is easy to dispel the heat of heat transfer efficiency.

The purpose of this utility model is achieved through the following technical solutions: a kind of electrolytic capacitor that is easy to dispel the heat, comprise cover plate, sleeve pipe, outer shell-and-core bag, described core bag is reeled by cathode foil, anode foil, electrolytic paper and lead-out tablet and is made, described anode foil is widened design, than the wide 3～5mm of described cathode foil, and directly contact with described housing bottom.

Further, the lower end of described anode foil and electrolytic paper align or protrude from outside the electrolytic paper, the lower end of described capacitor core bag the is many parcel of anode foil, and end face can be seen the anode foil that a circle circle is arranged, described capacitor core is sealed and is contained in the described aluminum hull.

The lower end of described anode foil can protrude from electrolytic paper 1～2mm.

The material of described shell is an aluminium.

Action principle of the present utility model is: the direct heat transfer that contacts with metal shell of the metal anode foil of this electrolytic capacitor, the heat that produces when the core job contract is done spreads out by the metal shell high efficiency, has increased a heat transfer path on the architecture basics of original electrolytic capacitor again; Because the real negative pole of electrolytic capacitor is a Working electrolyte, anode foil has been the effect of drawing; And the electrolytic paper that flooded electrolyte is original and the aluminium outer casing bottom contacts, and receives the short circuit that can't cause capacitor on the aluminium shell so anode foil drawn, and also can not influence the electrical characteristic of capacitor.

Owing to adopt technique scheme, the electrolytic capacitor that is easy to dispel the heat that the utility model provides has such beneficial effect: when the core job contract is done, can be by directly carrying out transmission of heat by contact between anode foil and metal shell, the heat that can quicken capacitor inside like this spreads to the external world, make the internal temperature rise of capacitor reduce by 13.1～13.9% with respect to existing electrolytic capacitor, strengthen its security reliability, improved the durability of capacitor.

Description of drawings

Fig. 1 is the cutaway view of the utility model electrolytic capacitor.

Fig. 2 is that the core bag of electrolytic capacitor shown in Figure 1 launches schematic diagram.

The member title of each label correspondence is as shown in table 1 among the above-mentioned figure:

Each member name list of table 1 capacitor

①	Cover plate
①	Cover plate	②	Sleeve pipe
③	Aluminum hull	②	Sleeve pipe
③	Aluminum hull	④	The core bag
⑤	Lead-out tablet	④	The core bag
⑤	Lead-out tablet	⑥	Cathode foil
⑦	Anode foil	⑥	Cathode foil
⑦	Anode foil	⑧	Electrolytic paper

Embodiment

Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.

Embodiment 1

Fig. 1～Fig. 2 shows concrete structure of the present utility model, as seen from Figure 1, this electrolytic capacitor comprise cover plate 1., sleeve pipe 2., aluminum hull 3. with the core bag 4., described core bag 4. by cathode foil 6., anode foil 7., 5. 8. electrolytic paper reel with lead-out tablet and make, 7. described anode foil widens design, and as shown in Figure 2, anode foil upper end 7. is concordant with cathode foil upper end 6., anode foil lower end 7. is than the wide 3mm in cathode foil lower end 6., and 8. anode foil lower end and electrolytic paper 7. align.Coiling make the core bag 4. after, 8. core bag upper end (end that lead-out tablet is arranged) 4. is the same with conventional capacitor core bag wraps up for electrolytic paper; Core bag lower end 4. except 8. electrolytic paper wraps up, more than anode foil parcel 7., end face can see a circle circle is arranged anode foil 7..The core bag 4. after flooding Working electrolyte, be encapsulated in aluminum hull 3. in, anode foil 7. just and aluminum hull contact bottom 3., can realize direct contact heat transfer.

Embodiment 2

Present embodiment except that following characteristics with embodiment 1: 7. than the 6. wide 4mm of cathode foil, described anode foil lower end 7. protrudes from 8. 1mm of electrolytic paper to described anode foil.

Embodiment 3

Present embodiment except that following characteristics with embodiment 1: 7. than the 6. wide 5mm of cathode foil, described anode foil lower end 7. protrudes from 8. 2mm of electrolytic paper to described anode foil.

With the aluminium electrolytic capacitor of routine and the aluminium electrolytic capacitor of the foregoing description, carry out the contrast of capacitor internal temperature rise at normal temperatures.The platinum electrode temp probe is used in the measurement of capacitor internal temperature, and the aluminum hull central authorities in the product bottom open an aperture, in the middle of the core bag, use the temp probe plug epoxy resin the aperture good seal then.

Comparing result is as shown in table 2, and as can be seen from Table 2, aluminium electrolytic capacitor of the foregoing description and conventional aluminium electrolytic capacitor internal temperature rise differ 2.9 ℃, 3.3 ℃, and the temperature rise range of decrease can reach 13.1%, 13.9%.As seen adopt aluminium electrolytic capacitor of the present utility model, compare conventional art, can improve the diffuser efficiency of core bag heat, reduce the capacitor temperature inside, reliability tightens security.

The contrast of table 2 capacitor internal temperature rise

The foregoing description is the utility model preferred implementation; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.

Claims

1, a kind of electrolytic capacitor that is easy to dispel the heat comprises cover plate, sleeve pipe, outer shell-and-core bag, and described core bag is reeled by cathode foil, anode foil, electrolytic paper and lead-out tablet and made, and it is characterized in that: described anode foil directly contacts with described housing bottom.

2, the electrolytic capacitor that is easy to dispel the heat according to claim 1 is characterized in that: the lower end of described anode foil and electrolytic paper align or protrude from outside the electrolytic paper, the lower end of described capacitor core bag the is many parcel of anode foil.

3, the electrolytic capacitor that is easy to dispel the heat according to claim 2, it is characterized in that: the lower end of described anode foil protrudes from electrolytic paper 1～2mm.

4, the electrolytic capacitor that is easy to dispel the heat according to claim 1 is characterized in that: described anode foil is for widening design, than the wide 3～5mm of described cathode foil.

5, the electrolytic capacitor that is easy to dispel the heat according to claim 1 is characterized in that: the material of described shell is an aluminium.