Thin film capacitor

Abstract

A thin film capacitor comprises a core, a base and a cover plate, and the cover plate is connected to the base to form a containing space of the core. The core is arranged in a containing space formed by the cover plate and the base in a sealed mode. The first terminal and the second terminal of the core are respectively connected to the first busbar and the second busbar, and the first busbar comprises a first connecting plate, a first connecting piece and a first external terminal; the external terminal is connected with the first connecting plate through a connecting piece, and the first connecting plate is provided with a first connecting tongue; and gaps among the core, the base and the cover plate are filled and sealed by sealant. According to the utility model, the first connecting tongue and the second connecting tongue are respectively arranged on the first busbar and the second busbar, so that when the first terminal and the second terminal of the core are electrically connected with the first busbar and the second busbar, welding is convenient, and pseudo soldering is not easy to occur.

Description

TECHNICAL FIELD

[0001] The utility model relates to a film capacitor, especially a film capacitor with convenient core and busbar connection. BACKGROUND

[0002] Film capacitors are widely used in electronic devices, industrial control, automobiles and other fields. Currently, the film capacitors on the market are mainly composed of capacitor core, busbar, packaging shell and filling resin.

[0003] However, in the production process of the film capacitor, the connection position of the busbar and the terminal of the core is not designed with a connection structure, which makes the connection between the busbar and the terminal of the core inconvenient, and there is a phenomenon of false welding. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a film capacitor with convenient core and busbar connection.

[0005] To solve the above technical problems, the technical scheme provided by the utility model is as follows: a film capacitor, comprising a core, a base and a cover plate, the cover plate is connected to the base to form a containing space for the core; the core is sealed in the containing space formed by the cover plate and the base; the first terminal and the second terminal of the core are connected to the first busbar and the second busbar respectively, the first busbar comprises a first connecting plate, a first connecting piece and a first external terminal; the first external terminal is connected to the first connecting plate through the first connecting piece, and the first connecting plate is provided with a first connecting tongue; the second busbar comprises a second connecting plate, a second connecting piece and a second external terminal; the second external terminal is connected to the second connecting plate through the second connecting piece, and the second connecting plate is provided with a second connecting tongue; the first connecting plate and the second connecting plate are electrically connected to the first terminal and the second terminal respectively; the gap between the core and the base and the cover plate is filled and sealed with sealing glue.

[0006] Preferably, the first connecting tongue and the first connecting plate form a gap therebetween, and the second connecting tongue and the second connecting plate also form a gap therebetween.

[0007] Preferably, the first busbar and the second busbar are integrally formed by copper-clad aluminum plate material.

[0008] Preferably, the first connecting piece is n-shaped, one end of the first connecting piece is connected to the first connecting plate, and the other end is connected to the first external terminal.

[0009] Preferably, the second connecting piece is n-shaped, one end of the second connecting piece is connected to the second connecting plate, and the other end is connected to the second external terminal.

[0010] Preferably, the first and second external terminals extend from the same side of the base, the first and second connecting members are arranged on the side wall of the same side of the base, the first and second connecting plates are arranged above and below the core respectively, and the first and second connecting members are separated by the first insulating sheet.

[0011] Preferably, the first connecting member is provided with a second insulating sheet above.

[0012] Preferably, the first connecting plate is provided with an insulating plug above, and the insulating plug is fixedly connected with the base.

[0013] Compared with the prior art, the thin film capacitor has the advantages that: in the thin film capacitor, the first connecting tongue and the second connecting tongue are arranged on the first busbar and the second busbar respectively, so that the first terminal and the second terminal of the core are electrically connected with the first busbar and the second busbar, the welding is facilitated, and the false welding is not prone to occur. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the thin film capacitor in the embodiment 1.

[0015] Figure 2 It is a structure schematic view of the insulating plug and the second insulating sheet in the base in the embodiment 1.

[0016] Figure 3 It is a structure schematic view of the first busbar and the second insulating sheet in the base in the embodiment 1.

[0017] Figure 4 It is a structure schematic view of the first busbar in the base in the embodiment 1.

[0018] Figure 5 It is a structure schematic view of the first busbar in the base in the embodiment 1.

[0019] Figure 6 It is a structure schematic view of the first busbar and the second insulating sheet in the base in the embodiment 1.

[0020] Figure 7 It is a structure schematic view of the first busbar and the second insulating sheet in the base in the embodiment 1.

[0021] LEGEND

[0022] 1. Base; 2. Cover plate; 3. First busbar; 31. First connecting plate; 311. First connecting tongue; 32. First connector; 33. First external terminal; 4. Second busbar; 41. Second connecting plate; 411. Second connecting tongue; 42. Second connector; 43. Second external terminal; 5. Sealant; 6. First insulating sheet; 7. Second insulating sheet; 8. Insulating insert plate. Detailed Implementation

[0023] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0024] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0025] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention. Example 1

[0026] like Figure 1 A thin-film capacitor is shown, comprising a core, a base 1, and a cover plate 2. The cover plate 2 is connected to the base 1 to form a receiving space for the core. The core is sealed within the receiving space formed by the cover plate 2 and the base 1. The first terminal and the second terminal of the core are respectively connected to a first busbar 3 and a second busbar 4. Figure 3 and Figure 4 As shown, the first busbar 3 includes a first connecting plate 31, a first connecting member 32, and a first external terminal 33; the first external terminal is connected to the first connecting plate 31 via the first connecting member, and the first connecting plate 31 is provided with a first connecting tongue 311; the second busbar 4 includes a second connecting plate 41, a second connecting member 42, and a second external terminal 43; the second external terminal 43 is connected to the second connecting plate 41 via the second connecting member, and the second connecting plate 41 is provided with a second connecting tongue 411; the first connecting plate 31 and the second connecting plate 41 are electrically connected to the first terminal (not shown in the figure) and the second terminal (not shown in the figure), respectively; the gap between the core and the base 1 and the cover plate 2 is filled and sealed with sealant 5. Figure 5 As shown, after the sealant 5 is filled into the base 1, the core is wrapped around it. Figure 5The space occupied by the core in the elliptic cylindrical cavity; each core lower second terminal corresponding to the second bus bar on the two second connecting tongue 411, each core upper first terminal corresponding to the first bus bar on the two first connecting tongue 311.

[0027] In this embodiment, the first connecting tongue 311 and the first connecting plate 31 form a gap, and the second connecting tongue 411 and the second connecting plate 41 also form a gap. In this embodiment, the first terminal and the second terminal of the core are connected between the first connecting tongue 311 and the second connecting tongue 411 by soldering; in order to increase the effect of welding, the area of the first connecting tongue 311 and the second connecting tongue 411 is increased in this embodiment.

[0028] In this embodiment, because the film capacitor has no positive and negative poles, but there are two connecting terminals on the core package, which are the first terminal and the second terminal, and the first terminal and the second terminal are electrically connected to the positive and negative poles through the first bus bar 3 and the second bus bar 4 respectively.

[0029] In this embodiment, the first bus bar 3 and the second bus bar 4 are integrally formed by copper-clad aluminum plate; thereby saving cost.

[0030] In this embodiment, the first connecting piece 32 is arranged in n type, one end of the first connecting piece 32 is connected to the first connecting plate 31, and the other end is connected to the first external terminal 33. The second connecting piece 42 is arranged in n type, one end of the second connecting piece 42 is connected to the second connecting plate 41, and the other end is connected to the second external terminal 43. The first external terminal 33 and the second external terminal 43 extend from the same side of the base 1, the first connecting piece 32 and the second connecting piece 42 are arranged on the side wall of the same side of the base 1, the first connecting plate 31 and the second connecting plate 41 are arranged above and below the core respectively; the first connecting piece 32 and the second connecting piece 42 are isolated by the first insulating sheet 6. In this embodiment, the first connecting piece 32 and the second connecting piece 42 are arranged in n type, which can enhance the sealing performance of the core in the base 1, because the path of water vapor entering the core is longer.

[0031] In this embodiment, the first connecting piece 32 is arranged above the second insulating sheet 7. The second insulating sheet 7 is mainly used to protect the first connecting piece 32, to prevent conductive substances from contacting the first connecting piece 32 and causing short circuit.

[0032] In this embodiment, as shown in Figure 2As shown, the upper side of the first connecting plate 31 is provided with an insulating plug 8, which is fixedly connected with the base 1. The insulating plug 8 is mainly arranged to facilitate the filling of the sealant 5, because the cover plate 2 has not been connected to the base 1 when the sealant 5 is filled. At this time, the insulating plug 8 is used to support the first busbar 3, the core and the second busbar 4 in the base 1, so as to keep the first busbar 3, the core and the second busbar 4 fixed in the base 1.

[0033] In the embodiment, by arranging the first connecting tongue 311 and the second connecting tongue 411 on the first busbar 3 and the second busbar 4 respectively, when the first terminal and the second terminal of the core are electrically connected with the first busbar 3 and the second busbar 4, the welding is facilitated, and the false welding is not prone to occur.

Claims

1. A thin film capacitor characterized by: The application relates to a core, a base and a cover plate, wherein the cover plate is connected to the base to form a containing space of the core; the core is sealed in the containing space formed by the cover plate and the base; a first terminal and a second terminal of the core are connected to a first busbar and a second busbar respectively; the first busbar comprises a first connecting plate, a first connecting piece and a first external terminal; the first external terminal is connected to the first connecting plate through the first connecting piece; the first connecting plate is provided with a first connecting tongue; the second busbar comprises a second connecting plate, a second connecting piece and a second external terminal; the second external terminal is connected to the second connecting plate through the second connecting piece; the second connecting plate is provided with a second connecting tongue; the first connecting plate and the second connecting plate are electrically connected to the first terminal and the second terminal respectively; and the gap between the core and the base and the cover plate is filled and sealed by sealing glue.

2. The thin film capacitor of claim 1, wherein: The first connecting tongue and the first connecting plate form a gap, and the second connecting tongue and the second connecting plate also form a gap.

3. The thin film capacitor of claim 1, wherein: The first busbar and the second busbar are integrally formed by copper-clad aluminum plate.

4. The thin film capacitor of claim 1, wherein: The first connecting piece is in an n-shaped structure, one end of the first connecting piece is connected to the first connecting plate, and the other end is connected to the first external terminal.

5. The thin film capacitor of claim 1, wherein: The second connecting piece is in an n-shaped structure, one end of the second connecting piece is connected to the second connecting plate, and the other end is connected to the second external terminal.

6. The thin film capacitor of claim 1, wherein: The first external terminal and the second external terminal extend from the same side of the base; the first connecting piece and the second connecting piece are arranged on the side wall of the same side of the base; the first connecting plate and the second connecting plate are arranged above and below the core respectively; and the first connecting piece and the second connecting piece are isolated by a first insulating sheet.

7. The thin film capacitor of claim 6, wherein: A second insulating sheet is arranged above the first connecting piece.

8. The thin film capacitor of claim 6, wherein: An insulating plug plate is arranged above the first connecting plate and fixedly connected to the base.

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