CN214589569U - Composite busbar for automobile capacitor - Google Patents
Composite busbar for automobile capacitor Download PDFInfo
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- CN214589569U CN214589569U CN202120573800.8U CN202120573800U CN214589569U CN 214589569 U CN214589569 U CN 214589569U CN 202120573800 U CN202120573800 U CN 202120573800U CN 214589569 U CN214589569 U CN 214589569U
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- busbar
- insulating film
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- plate
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Abstract
The utility model provides a composite busbar for an automobile capacitor, which comprises an upper busbar unit and a lower busbar unit, wherein the upper busbar unit comprises an L-shaped upper busbar and an upper busbar insulating film, the L-shaped upper busbar comprises an upper busbar vertical plate and an upper busbar horizontal plate, and the upper busbar insulating film is attached to the inner side of the upper busbar vertical plate; the lower busbar unit comprises an L-shaped lower busbar and a lower busbar insulating film, the L-shaped lower busbar comprises a lower busbar vertical plate and a lower busbar horizontal plate, the lower busbar vertical plate comprises a lower busbar positioning plate and a connecting plate which are positioned on the upper side, and the lower busbar insulating film is attached to the inner side of the lower busbar positioning plate; the upper busbar insulating film and the lower busbar insulating film are made of polyimide; the utility model provides a compound female arranging has solved and has had the high temperature resistant grade not enough among the prior art, and high pressure resistant grade is not enough, and the stand wear ability is not enough and early inefficacy scheduling problem.
Description
Technical Field
The utility model belongs to an electrical connection part between the power module, concretely relates to car is female arranging of compound for condenser.
Background
The composite bus bar, also called laminated bus bar, generally comprises a conductive layer, an insulating layer and necessary positioning and bonding pieces, and is a multilayer composite structure. The connecting bar uses the composite busbar, can reduce the parasitic inductance of the return circuit, protect the switching device (such as IGBT) from being punctured by reverse voltage, can also reduce EMI electromagnetic interference in the return circuit, can improve the problems such as system heat dissipation and assembly connection at the same time, get the extensive application in the field of power conversion.
When the traditional composite busbar is used for material design and selection, the conducting layer generally adopts red copper (such as T2) or aluminum alloy (such as 1060), the insulating layer generally adopts polyester film (such as PET) or Nuomei paper (NOMEX), the bonding material generally adopts acrylic hot melt adhesive, the material price is low, but in some fields, the problems of insufficient high temperature resistance level, insufficient high pressure resistance level, insufficient wear resistance and the like exist, and particularly, the risk of early failure exists in the application of electric automobiles.
SUMMERY OF THE UTILITY MODEL
To the above defect, the utility model provides an upper bus bar unit and lower female unit all adopt the polyimide film as the insulating film, adopt cold subsides to coldly press that the technology of having of making of high temperature resistant registration and withstand voltage grade, and the car capacitor that life is higher, the reliability is stronger is with compound female arranging.
The utility model provides a following technical scheme: a composite busbar for an automobile capacitor comprises an upper busbar unit and a lower busbar unit, wherein the upper busbar unit comprises an L-shaped upper busbar and an upper busbar insulating film, the L-shaped upper busbar comprises an upper busbar vertical plate and an upper busbar horizontal plate, and the upper busbar insulating film is attached to the inner side of the upper busbar vertical plate by a cold-pasting and cold-pressing process in a mode of coating polyethylene back glue on a single surface or double surfaces;
the lower busbar unit comprises an L-shaped lower busbar and a lower busbar insulating film, the L-shaped lower busbar comprises a lower busbar vertical plate and a lower busbar horizontal plate, the lower busbar vertical plate comprises a lower busbar positioning plate and a connecting plate which are positioned at the upper side, four holes are uniformly distributed on the connecting plate, and the lower busbar insulating film is attached to the inner side of the lower busbar positioning plate by a cold-sticking and cold-pressing process in a mode of coating polyethylene back glue on a single surface or double surfaces;
the upper busbar insulating film and the lower busbar insulating film are made of polyimide;
the vertical direction width of the upper busbar vertical plate is equal to that of the lower busbar positioning plate, 2-3 circular upper busbar positioning holes are respectively formed in the upper busbar vertical plate, the same number of circular lower busbar positioning holes are formed in the positions, corresponding to the circular upper busbar positioning holes, of the lower busbar positioning plates, the circular lower busbar positioning holes are fixedly connected with the circular upper busbar positioning holes through flying disc-shaped positioning pins, upper busbar insulating film positioning holes corresponding to the upper busbar positioning holes are formed in the upper busbar insulating film, lower busbar insulating film positioning holes corresponding to the lower busbar positioning holes are formed in the lower busbar insulating film, and the lower busbar insulating film is located between the lower busbar positioning plates and the upper busbar vertical plate;
the edge of the upper busbar insulating film is 5mm longer than that of the upper busbar vertical plate, and the edge of the lower busbar insulating film is 5mm longer than that of the lower busbar positioning plate.
Furthermore, the flying saucer-shaped positioning pin comprises a circular butterfly wing and a positioning pin cylinder embedded in the middle of the circular butterfly wing and positioned on the upper end surface and the lower end surface of the circular butterfly wing.
Further, the circular butterfly wing and the positioning pin cylinder are integrally formed.
Furthermore, the height of the positioning pin cylinder is greater than or equal to the thickness of the plates of the upper busbar unit and the lower busbar unit.
Furthermore, the diameter of the positioning pin cylinder is equal to the diameter of the inner circle of the circular butterfly wing, is equal to the diameters of the upper busbar positioning hole and the lower busbar positioning hole, and is 3-6 mm.
Furthermore, the diameter of the outer circle of the circular ring-shaped butterfly wing is 5mm larger than that of the inner circle of the circular ring-shaped butterfly wing, and the 5mm is the creepage distance meeting the safety requirements.
Furthermore, the upper busbar insulating film and the lower busbar insulating film are made of polyimide.
Further, the upper busbar insulating film is attached to the vertical plate through a cold-pasting and cold-pressing process, and the lower busbar insulating film is attached to the lower busbar positioning plate through a cold-pasting and cold-pressing process.
Further, the upper busbar unit and the lower busbar unit are compounded by adopting a cold pressing process.
The utility model has the advantages that:
1. the utility model provides a car can be applied to electric automobile especially hybrid HEV etc. and have the field of high temperature resistant, high withstand voltage, high reliability requirement.
2. The utility model provides an automobile capacitor uses cold paste cold pressing composite technology in the preparation process, and the insulating film is not damaged in the course of the technology, and the polyvinyl alcohol gum layer can not take place chemical reaction, makes the long-lived longer of condenser, and the reliability is higher.
3. The utility model provides a polyimide film cold pressing composite busbar for automobile capacitor is owing to adopted and adopted polyimide film PI insulating layer and then has following tripartite advantage:
A. the applicable temperature range is wide: the high-temperature characteristic decomposition temperature is about 500 ℃, the long-term use temperature is-200-300 ℃, no obvious melting point exists, and the low-temperature characteristic cannot be brittle in liquid helium at-269 ℃;
B. the mechanical property is strong: the tensile strength of the unfilled polyimide is over 100Mpa, for example, the film of the pyromellitic polyimide is over 170Mpa, and the film of the biphenyl polyimide reaches 400 Mpa;
C. the insulating property is good: good dielectric property, the dielectric constant is about 3.4, fluorine is introduced, or air is dispersed in polyimide in a nanometer size, and the dielectric constant can be reduced to about 2.8.
4. The utility model provides a higher temperature resistant grade of car capacitor can be applied to the high temperature occasion. The traditional composite busbar adopts the polyimide film PI as an insulating layer, the high temperature resistant grade is 105 ℃, the polyimide film PI as an insulating layer, the high temperature resistant grade is 220 ℃ (see data in the following table), and the high temperature requirement of the HEV of the hybrid electric vehicle can be met.
5. The utility model provides a higher withstand voltage level of car capacitor can realize the condenser of higher voltage with thinner membrane. According to the traditional composite busbar, a polyester film PET is used as an insulating layer, the dielectric strength is 120KV/mm, a polyimide film PI is used as an insulating layer, the dielectric strength is 170KV/mm, and the thickness of the film can be reduced by 1/3 under the same application condition.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is an overall schematic view of a polyimide film cold-pressed composite bus bar for an automobile capacitor provided by the present invention;
fig. 2 is an exploded structural view of an upper busbar unit of a polyimide film cold-pressed composite busbar for an automobile capacitor provided by the present invention;
fig. 3 is an exploded structural view of a lower busbar unit of the polyimide film cold-pressed composite busbar for the automotive capacitor provided by the present invention;
fig. 4 is a top side view of the flying saucer-shaped positioning pin of the polyimide film cold-pressed composite bus bar for the automotive capacitor provided by the present invention;
fig. 5 is the utility model provides a frisby dress locating pin that compound mother was arranged is colded pressing to polyimide film for car condenser's side view.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, for the composite busbar for the automotive capacitor provided by the utility model, the composite busbar comprises an upper busbar unit 1 and a lower busbar unit 2, as shown in fig. 2, the upper busbar unit 1 comprises an upper busbar 1-1 in an L shape and an upper busbar insulating film 1-2, the upper busbar 1-1 in the L shape comprises an upper busbar vertical plate 1-11 and an upper busbar horizontal plate 1-12, and the upper busbar insulating film 1-2 is attached to the inner side of the upper busbar vertical plate 1-11 by a cold-pasting cold-pressing process in a single-sided or double-sided polyethylene back glue coating manner;
as shown in fig. 3, the lower busbar unit 2 comprises an L-shaped lower busbar 2-1 and a lower busbar insulating film 2-2, the L-shaped lower busbar 2-1 comprises a lower busbar vertical plate 2-11 and a lower busbar horizontal plate 2-12, the lower busbar vertical plate 2-11 comprises a lower busbar positioning plate 2-111 and a connecting plate 2-112 which are positioned at the upper side, four holes 2-113 are uniformly distributed on the connecting plate 2-112, and the lower busbar insulating film 2-2 is attached to the inner side of the lower busbar positioning plate 2-111 by a cold-pasting and cold-pressing process in a mode of coating polyethylene back glue on a single surface or double surfaces;
the upper bus insulating film 1-2 and the lower bus insulating film 2-2 are made of polyimide;
the vertical direction width of an upper busbar vertical plate 1-11 is equal to the vertical direction width of a lower busbar positioning plate 2-111, 2-3 circular upper busbar positioning holes 1-3 are respectively arranged on the upper busbar vertical plate 1-11, the circular lower busbar positioning holes 1-4 are fixedly connected with the circular upper busbar positioning holes 1-3 through flying disc-shaped positioning pins 3, upper busbar insulating film positioning holes 1-21 corresponding to the upper busbar positioning holes 1-3 are formed in an upper busbar insulating film 1-2, lower busbar insulating films 2-21 corresponding to the lower busbar positioning holes 1-4 are formed in lower busbar insulating films 2-2, and then the lower busbar insulating films 2-2 are positioned between the lower busbar positioning plates 2-111 and the upper busbar vertical plates 1-11;
the edge of the upper busbar insulating film 1-2 is 5mm longer than the edge of the upper busbar vertical plate 1-11, and the edge of the lower busbar insulating film 2-2 is 5mm longer than the edge of the lower busbar positioning plate 2-111.
The upper busbar 1-1 and the lower busbar 2-1 are made of T2Y2 copper plates with the thickness of 1.5 mm.
As shown in fig. 4-5, the flying saucer-shaped positioning pin 3 includes a circular ring-shaped butterfly wing 3-1 and a positioning pin cylinder 3-2 embedded in the middle of the circular ring-shaped butterfly wing 3-1 and located on the upper and lower end surfaces, and the circular ring-shaped butterfly wing 3-1 and the positioning pin cylinder 3-2 of the flying saucer-shaped positioning pin 3 are integrally formed by a PPS-50GF material. The pattern of the insulating film of 0.2mm thickness is according to generally arranging the shape design according to female, and the insulating layer is more than 5mm at female edge of arranging from top to bottom, as ann rule distance, the utility model discloses a female corresponding position of arranging at the insulating layer is with the same hole of diameter, uses as attached and equipment locating hole.
The height of the positioning pin cylinder 3-2 is larger than or equal to the thickness of the plates of the upper busbar unit 1 and the lower busbar unit 2.
The diameter of the positioning pin cylinder 3-2 is equal to the diameter of the inner circle of the circular butterfly wing, is equal to the diameters of the upper busbar positioning hole 1-3 and the lower busbar positioning hole 1-4, and is 3 mm-6 mm.
The diameter of the outer circle of the circular ring-shaped butterfly wing 3-1 is 5mm larger than that of the inner circle thereof, and the 5mm is the creepage distance for meeting the safety regulation requirement.
The preparation method of the polyimide film cold-pressed composite busbar for the automobile capacitor provided by the embodiment comprises the following steps:
1) the method comprises the following steps of respectively manufacturing an L-shaped upper busbar 1-1 and an L-shaped lower busbar 2-1 by adopting a T2Y2 red copper plate with the thickness of 1.5mm through the procedures of laser cutting blanking, bending, deburring, surface wire drawing, rivet welding of a terminal, acid washing and electroplating;
2) the flying saucer-shaped positioning pin 3 is formed by injection molding or 3D printing of a PPS-50GF material mold;
3) coating polyvinyl alcohol gum on one side or two sides of the upper busbar insulation film 1-2, and protecting with release paper; coating polyvinyl alcohol gum on one side or two sides of the lower busbar insulating film 2-2 with release paper protection, and making into required patterns through a die stamping or laser cutting process;
4) respectively placing the upper busbar unit 1 and the lower busbar unit 2 in a tool, and attaching an upper busbar insulating film 1-2 to the inner side of an upper busbar vertical plate 1-11 by a cold-sticking and cold-pressing process in a mode of coating polyethylene back glue on a single surface or double surfaces; the lower busbar insulating film 2-2 is attached to the inner side of the lower busbar positioning plate 2-111 by adopting a cold-sticking and cold-pressing process of coating polyethylene gum on a single surface or double surfaces, an insulating layer with release paper torn off is attached to the surfaces of the upper busbar 1-1 and the lower busbar 2-1, an elastic rubber pad is placed, pressure equipment is used for operation within pressure keeping time, the attachment of the upper busbar insulating film 1-2 to one surface of the upper busbar 1-1 and the lower busbar insulating film 2-2 to one surface of the lower busbar 2-1 is completed, and if the other surface is also required to be attached, the insulating layer is bent to the other surface along the edge covering direction;
5) and arranging the flying saucer positioning pins 3 on the busbar unit and the insulating layer through respective positioning holes to complete the positioning combination of the upper busbar unit 1 and the lower busbar unit 2, thereby obtaining the polyimide film cold-pressing composite busbar for the automobile capacitor.
The adhesive is prepared by coating back glue on one side or two sides of polyvinyl alcohol between the upper busbar and the lower busbar and the polyimide, and the polyvinyl alcohol back glue layer does not have chemical reaction by using a cold pressing and cold pasting process, and does not cause stress puncture on the polyimide due to solidification in use.
Wherein go up female the design of arranging, arranging down and carry on spacingly and insulating for locating hole, locating pin, can avoid the damage to female electroplating layer of arranging because of using the frock in the assembling process, have advantages such as location is accurate, the equipment is convenient.
The design of the upper busbar and the lower busbar is that the positioning hole and the positioning pin are used for limiting and insulating, so that the damage to a busbar electroplated layer caused by the use of a tool in the assembling process can be avoided, and the device has the advantages of being accurate in positioning, convenient to assemble and the like.
Through experimental, the utility model provides a polyimide film composite busbar of colding pressing for car condenser has higher withstand voltage level, can realize the condenser of higher voltage with thinner membrane. According to the traditional composite busbar, a polyester film PET is used as an insulating layer, the dielectric strength is 120KV/mm, a polyimide film PI is used as an insulating layer, the dielectric strength is 170KV/mm (see data in table 1), and the thickness of the film can be reduced by 1/3 under the same application condition.
TABLE 1
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (7)
1. The composite busbar for the automobile capacitor is characterized by comprising an upper busbar unit (1) and a lower busbar unit (2), wherein the upper busbar unit (1) comprises an L-shaped upper busbar (1-1) and an upper busbar insulating film (1-2), the L-shaped upper busbar (1-1) comprises an upper busbar vertical plate (1-11) and an upper busbar horizontal plate (1-12), and the upper busbar insulating film (1-2) is attached to the inner side of the upper busbar vertical plate (1-11) by a cold-pasting and cold-pressing process in a mode of coating polyethylene gum on a single surface or double surfaces;
the lower busbar unit (2) comprises an L-shaped lower busbar (2-1) and a lower busbar insulating film (2-2), the L-shaped lower busbar (2-1) comprises a lower busbar vertical plate (2-11) and a lower busbar horizontal plate (2-12), the lower busbar vertical plate (2-11) comprises a lower busbar positioning plate (2-111) and a connecting plate (2-112) which are positioned on the upper side, four holes (2-113) are uniformly distributed on the connecting plate (2-112), and the lower busbar insulating film (2-2) is attached to the inner side of the lower busbar positioning plate (2-111) by a cold-pasting and cold-pressing process in a mode of coating polyethylene gum on one side or two sides;
the upper busbar insulating film (1-2) and the lower busbar insulating film (2-2) are made of polyimide;
the vertical direction width of the upper busbar vertical plate (1-11) is equal to that of the lower busbar positioning plate (2-111), 2-3 circular upper busbar positioning holes (1-3) are respectively formed in the upper busbar vertical plate (1-11), the same number of circular lower busbar positioning holes (1-4) are formed in the lower busbar positioning plate (2-111) at positions corresponding to the circular upper busbar positioning holes (1-3), the circular lower busbar positioning holes (1-4) are fixedly connected with the circular upper busbar positioning holes (1-3) through flying disc-shaped positioning pins (3), upper busbar positioning holes (1-21) corresponding to the upper busbar positioning holes (1-3) are formed in the upper busbar insulating film (1-2), and the lower busbar insulating film (2-2) is provided with upper busbar positioning holes (1-4) which are aligned with the lower busbar positioning holes (1-4) A lower busbar insulating film positioning hole (2-21) is formed, and the lower busbar insulating film (2-2) is positioned between the lower busbar positioning plate (2-111) and the upper busbar vertical plate (1-11);
the edge of the upper busbar insulating film (1-2) is 5mm longer than the edge of the upper busbar vertical plate (1-11), and the edge of the lower busbar insulating film (2-2) is 5mm longer than the edge of the lower busbar positioning plate (2-111).
2. The composite busbar for the automobile capacitor as claimed in claim 1, wherein the flying saucer-shaped positioning pin (3) comprises a circular ring-shaped butterfly wing (3-1) and a positioning pin cylinder (3-2) embedded in the middle of the circular ring-shaped butterfly wing (3-1) and positioned on the upper end surface and the lower end surface.
3. The composite busbar for the automobile capacitor as claimed in claim 2, wherein the circular butterfly wing (3-1) and the positioning pin cylinder (3-2) are integrally formed.
4. The composite busbar for the automobile capacitor as claimed in claim 2, wherein the height of the positioning pin cylinder (3-2) is greater than or equal to the thickness of the plates of the upper busbar unit (1) and the lower busbar unit (2).
5. The composite busbar for the automobile capacitor as claimed in claim 2, wherein the diameter of the positioning pin cylinder (3-2) is equal to the diameter of the inner circle of the circular butterfly wing, is equal to the diameters of the upper busbar positioning hole (1-3) and the lower busbar positioning hole (1-4), and is 3mm to 6 mm.
6. The composite busbar for the automobile capacitor as claimed in claim 2, wherein the diameter of the outer circle of the circular ring-shaped butterfly wing (3-1) is 5mm larger than the diameter of the inner circle thereof.
7. The composite busbar for the automobile capacitor as claimed in claim 1, wherein the upper busbar unit (1) and the lower busbar unit (2) are compounded by a cold pressing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120573800.8U CN214589569U (en) | 2021-03-22 | 2021-03-22 | Composite busbar for automobile capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120573800.8U CN214589569U (en) | 2021-03-22 | 2021-03-22 | Composite busbar for automobile capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214589569U true CN214589569U (en) | 2021-11-02 |
Family
ID=78320889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120573800.8U Active CN214589569U (en) | 2021-03-22 | 2021-03-22 | Composite busbar for automobile capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214589569U (en) |
-
2021
- 2021-03-22 CN CN202120573800.8U patent/CN214589569U/en active Active
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