CN202996601U

CN202996601U - Electric power electronic capacitor for copper strip single side welding

Info

Publication number: CN202996601U
Application number: CN 201220680274
Authority: CN
Inventors: 杨波; 汪威; 潘焱尧; 潘毓娴
Original assignee: Anhui Tongfeng Electronics Co Ltd
Current assignee: Anhui Tongfeng Electronics Co Ltd
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2013-06-12
Anticipated expiration: 2022-12-11

Abstract

The utility model relates to an electric power electronic capacitor for copper strip single side welding. The electric power electronic capacitor for copper strip single side welding comprises a cover plate assembly, a casing and core sets, wherein the core sets are fixed in the casing, each core set is formed by piling a plurality of capacitor cores up, metal sprayed faces at two sides of each core set are respectively provided with leading-out copper strips, an upper end of the leading-out copper strip is bent to form a leading-out electrode, one side edge of the leading-out copper strip is in electrical connection with the metal sprayed face of the core set through welding points. By arranging the welding points at one side of the leading-out copper strip, not only can connection strength of the leading-out copper strip and the core set be guaranteed, but also pull damage to the welding points caused by expansion and contraction of the leading-out copper strip can be reduced, so adaptation capability for environment temperature change of the capacitor is improved.

Description

The power electronic capacitor of the monolateral welding of copper strips

Technical field

The utility model relates to a kind of power electronic capacitor, the power electronic capacitor of the specifically monolateral welding of a kind of copper strips.

Background technology

At present, use the high-power electric and electronic capacitor of flattening formula capacitor body, one or more groups core group is set in shell, every core assembly group is formed by stacking up and down by a plurality of flattening formula capacitor bodies; Every core assembly group both sides metal spraying face is provided with draws copper strips, draws copper strips both sides and is electrically connected to by solder joint with the metal spraying face respectively.Because the electric current by drawing copper strips is larger, considered its overcurrent performance, draw the copper strips general face cross section crossed larger.Therefore, electric current by the time draw the more and expanded by heating of the heat that produces on copper strips, and can cooling contraction when quitting work, this expanding with heat and contract with cold can produce larger stress to the both sides solder joint, easily pull solder joint.Therefore, this capacitor is usually more responsive to ambient temperature, if circumstance of temperature difference changes greatly, can aggravate to draw this phenomenon of expanding with heat and contract with cold of copper strips, very easily pulls solder joint, causes solder joint become flexible or come off, and causes the capacity loss of capacitor even to lose efficacy.

Summary of the invention

The purpose of this utility model is to provide the power electronic capacitor of the monolateral welding of a kind of copper strips, can reduce to draw copper strips the pulling of butt welding point of expanding with heat and contract with cold, and improves capacitor to the adaptive capacity of environment.

The utility model is achieved in that and comprises cover plate assembly, shell, core group; The core group is fixing in the enclosure; Every core assembly group is formed by stacking up and down by a plurality of flattening formula capacitor bodies; Be respectively equipped with on the metal spraying face of every core assembly group both sides and draw copper strips, drawing the copper strips upper end has bending to form to be used for welding the extraction electrode that is electrically connected to the cover plate assembly leading-out terminal; Drawing copper strips one lateral edges is electrically connected to by solder joint with core group metal spraying face.Draw copper strips one side because solder joint is arranged on, therefore, drawing copper strips can expand and shrink to opposite side, little to one side weld point destruction, even not impact, solder joint descends to the sensitiveness of drawing the copper strips variations in temperature, therefore, improved the adaptive capacity of capacitor to environment.

Preferred version of the utility model is: draw copper strips outside and be provided with second by stack and draw copper strips, draw copper strips and second and draw copper strips and be electrically connected to by solder joint with the metal spraying face at a lateral edges.By the double-deck copper strips that superposes, in the situation that equal overflow section can reduce to draw the copper strips width, use to be fit to the narrow core group of end face, to guarantee core group metal spraying face, enough bonding areas are arranged; Be conducive to simultaneously shunting by drawing the copper strips electric current, electric current can branch to second by the heat that produces and draw on copper strips, makes two temperature rises of drawing copper strips reduce, thus the stress that the butt welding point that reduces to expand with heat and contract with cold produces.

For the ease of welding, second draws copper strips and draws copper strips and be step-like in solder joint one side at least and be dislocatedly distributed, make and draw copper strips and do not have in welding one side and drawn the exposed platform that copper strips covers by second, so that pile up scolder when being used for welding, improve weld strength.

As shown from the above technical solution, the utility model is by arranging solder joint drawing copper strips one side, both can guarantee to draw the bonding strength of copper strips and core group, satisfy its overcurrent performance, can reduce again to draw copper strips the pulling of butt welding point of expanding with heat and contract with cold, improve the adaptive capacity of capacitor to variation of ambient temperature.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is another example structure schematic diagram of the utility model.

Embodiment

As shown in Figure 1 and Figure 2, the utility model comprises cover plate assembly 2, shell 1, core group 3; Core group 3 has two groups, and core group 3 is fixed in shell 1, can casting resin or liquid impregnation agent in inner chamber 9; Every core assembly group 3 is formed by stacking up and down by a plurality of flattening formula capacitor bodies; Be respectively equipped with on every core assembly group 3 both sides metal spraying faces 31 and draw copper strips 5, drawing copper strips 5 upper ends has bending to form the extraction electrode 51 that is used for welding the wire 7 that is connected with cover plate assembly 2 leading-out terminals 21; Drawing copper strips one side is electrically connected to by solder joint 6 with the metal spraying face.

Core group 3 tops are provided with upper and

lower insulation board

42,41, and the extraction electrode 51 of drawing copper strips 5 upper ends is arranged between upper and

lower insulation board

42,41, have the hole of passing for wire 7 on upper insulation plate 42; The metal spraying face 31 of each core group 3 with draw after copper strips 5 welding complete, with insulating tape, two core assembly group surroundings is wound around and ties up fixing and form insulating barrier 8 in core group surrounding, then the core group after tying up is placed in shell 1.Loosening for preventing from drawing copper strips 5, upper insulation plate 42 tops are placed with briquetting 43.

Figure 3 shows that double-deck copper strips structure.Drawing copper strips 5 outsides is provided with second by stack and draws copper strips 10, second draws copper strips 10 and draws copper strips 5 and be step-like in solder joint one side at least and be dislocatedly distributed, make and draw copper strips 5 and do not have in welding one side and drawn the exposed platform 52 that copper strips 10 covers by second, draw copper strips 5 and second and draw copper strips 10 and be electrically connected to by solder joint 6 with metal spraying face 31 in exposed platform 52 1 sides of drawing copper strips.

Claims

1. the power electronic capacitor of the monolateral welding of copper strips, comprise cover plate assembly (2), shell (1), capacitor core group (3); Core group (3) is fixed in shell (1), and every core assembly group (3) is formed by stacking up and down by a plurality of flattening formula capacitor bodies; Be respectively equipped with on every core assembly group (3) both sides metal spraying faces (31) and draw copper strips (5), draw the extraction electrode (51) that copper strips (5) upper end has bending to form to be used for welding to be electrically connected to cover plate assembly (2) leading-out terminal (21); It is characterized in that: draw copper strips (5) one lateral edges and be electrically connected to by solder joint (6) with core group (3) metal spraying face (31).

2. the power electronic capacitor of the monolateral welding of copper strips according to claim 1, it is characterized in that: draw copper strips (5) outside and be provided with second by stack and draw copper strips (10), draw copper strips (5) and second and draw copper strips (10) and be electrically connected to by solder joint (6) with metal spraying face (31) at a lateral edges.

3. the power electronic capacitor of the monolateral welding of copper strips according to claim 2, it is characterized in that: second draws copper strips (10) and draws copper strips (5) and be step-like in solder joint one side at least and be dislocatedly distributed, and makes to draw copper strips (5) and do not have in welding one side and drawn by second the exposed platform (52) that copper strips (10) covers.