Flat thin-film capacitor core arrangement and copper bar structure thereof

Abstract

The utility model discloses a flattened film capacitor core arrangement and copper bar structure, which comprises a small copper bar, two welding areas are arranged on the small copper bar, a plurality of grooves are arranged on the small copper bar, the small copper bar which can be subjected to electric resistance welding with a capacitor core is added, and after the small copper bar is subjected to electric resistance welding with a capacitor, the small copper bar can be subjected to electric resistance welding with the capacitor core. According to the utility model, the capacitor is welded with the large laminated copper bar, so that the flexibility of capacitor placement can be improved, the size flattening can be realized, the ESL (equivalent series inductance) can be reduced, the thin-film capacitor core can be flatly laid on the structure of the surface of the copper bar, the positive and negative copper bars adopt the laminated structure, the electrical characteristics of the controller can be improved, and the overall thickness can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of film capacitor cores, in particular to a flattened film capacitor core arrangement and a copper row structure thereof. Background Art

[0002] The core of electric vehicles is the three-electric system, namely, battery, motor and controller. Film capacitors are important components in motor controllers. The main function of film capacitors is to filter and smooth spikes. The entire capacitor is usually connected by soldering with several film capacitor cores and positive and negative copper bars. Due to the limitation of soldering structure, it is difficult to achieve a flat design for the entire capacitor. The capacitor occupies a large space, which affects the layout inside the controller. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a flattened film capacitor core arrangement and a copper bar structure thereof, by adding a small copper bar that can be resistance-welded to the capacitor core, and the small copper bar is resistance-welded to the capacitor and then welded to the large laminated copper bar, thereby improving the flexibility of capacitor placement, achieving size flattening, and reducing ESL (equivalent series inductance), so that the film capacitor core can be laid flat on the surface of the copper bar structure, and the positive and negative copper bars adopt a laminated structure, which can improve the electrical characteristics of the controller and reduce the overall thickness.

[0004] The utility model also provides a flattened film capacitor core copper bar structure, comprising a small copper bar, two welding areas are arranged on the small copper bar, and a plurality of grooves are arranged on the small copper bar.

[0005] According to the flattened film capacitor core copper bar structure described in the utility model, the outer surface of the small copper bar is fixedly connected with the capacitor core.

[0006] According to the flattened copper bar structure of the film capacitor core described in the utility model, a plurality of the grooves are evenly arranged on the small copper bar.

[0007] A flattened film capacitor core arrangement according to the utility model includes any of the flattened film capacitor core copper bar structures described above, and also includes a laminated copper bar, the laminated copper bar is divided into two layers, the capacitor core is laid flat on the upper surface of the laminated copper bar.

[0008] According to the flattened film capacitor core arrangement described in the utility model, the upper and lower layers are respectively the positive copper bar and the negative copper bar.

[0009] According to the flattened film capacitor core arrangement described in the utility model, a connecting plate is fixedly connected to the side surface of the negative copper bar, and the connecting plate is fixedly connected to the small copper bar. Beneficial Effects

[0010] Compared with the existing technology, the flattened film capacitor core arrangement and its copper bar structure increase the flexibility of capacitor placement and achieve flattening of size while reducing ESL (equivalent series inductance) by adding a small copper bar that can be resistance welded to the capacitor core. After the small copper bar is resistance welded to the capacitor, it is then welded to the large laminated copper bar.

[0011] Compared with the prior art, the flattened film capacitor core arrangement and its copper busbar structure can make the film capacitor core flat on the surface of the copper busbar. The positive and negative copper busbars adopt a laminated structure, which can improve the electrical characteristics of the controller and reduce the overall thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0013] Figure 1 This is the overall structural diagram of the flattened film capacitor core arrangement of the utility model;

[0014] Figure 2 The overall structure diagram of the capacitor core of the utility model is a flattened film capacitor core arrangement;

[0015] Figure 3 The utility model is a diagram showing the overall structure of the flattened film capacitor core copper bar structure.

[0016] Legend:

[0017] 1. Laminated copper busbar; 2. Capacitor core; 3. Small copper busbar; 4. Welding area; 5. Slot. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0019] Reference Figure 1-3 The utility model embodiment provides a flattened film capacitor core arrangement and a copper bar structure thereof, which includes: a small copper bar 3 for connecting a laminated copper bar 1 and a capacitor core 2; two welding areas 4 are provided on the small copper bar 3 for connecting the capacitor core; the two welding areas increase the stability of the connection; a plurality of grooves 5 are provided on the small copper bar 3; the plurality of grooves 5 are evenly arranged on the small copper bar 3; the tin on the surface of the capacitor is melted and enters the grooves 5, thereby increasing the bonding force between the small copper bar 3 and the capacitor core 2; the outer surface of the small copper bar 3 is fixedly connected with the capacitor core 2.

[0020] A flattened film capacitor core copper bar structure comprises any of the above-described flattened film capacitor core copper bar structures, and further comprises a laminated copper bar 1, wherein the laminated copper bar 1 is divided into an upper and lower layer, a capacitor core 2 is laid flat on the upper surface of the laminated copper bar 1, and the upper and lower layers are respectively a positive copper bar and a negative copper bar, a side surface of the negative copper bar is fixedly connected with a connecting plate, and the connecting plate is fixedly connected to a small copper bar 3 for connecting the small copper bar 3.

[0021] Working principle: After the capacitor core and the small copper bar are welded, multiple capacitor cores are placed on the large laminated copper bar 1 and welded to form a connection between the capacitor core and the laminated copper bar 1. Two welding areas 4 are provided on a small copper bar 3 to improve the reliability of welding. A groove 5 is provided on the welding surface of the small copper bar 3 and the capacitor core 2. The purpose is to allow the tin on the surface of the capacitor to melt and enter the groove during the welding process, thereby increasing the bonding force between the small copper bar 3 and the capacitor core 2.

[0022] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A flattened film capacitor core copper bar structure, characterized in that: include: A small copper bar (3), wherein two welding areas (4) are arranged on the small copper bar (3), a plurality of grooves (5) are arranged on the small copper bar (3), a capacitor core (2) is fixedly connected to the outer surface of the small copper bar (3), and the plurality of grooves (5) are evenly arranged on the small copper bar (3).

2. A flattened film capacitor core arrangement, characterized in that: The flattened film capacitor core copper busbar structure according to claim 1 also includes a laminated copper busbar (1), wherein the laminated copper busbar (1) is divided into two layers, the upper and lower layers, and the capacitor core (2) is laid flat on the upper surface of the laminated copper busbar (1).

3. A flattened film capacitor core arrangement according to claim 2, characterized in that: The upper and lower layers are respectively the positive copper busbar and the negative copper busbar.

4. A flattened film capacitor core arrangement according to claim 3, characterized in that: A connecting plate is fixedly connected to the side surface of the negative electrode copper bar, and the connecting plate is fixedly connected to the small copper bar (3).

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