CN217690811U - Capacitor assembly and inverter - Google Patents
Capacitor assembly and inverter Download PDFInfo
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- CN217690811U CN217690811U CN202221379364.1U CN202221379364U CN217690811U CN 217690811 U CN217690811 U CN 217690811U CN 202221379364 U CN202221379364 U CN 202221379364U CN 217690811 U CN217690811 U CN 217690811U
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- copper bar
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Abstract
The utility model discloses a capacitor component and an inverter, which comprises a composite copper bar structure, a first copper bar and a second copper bar, wherein the first copper bar and the second copper bar are insulated from each other and are arranged in a stacked manner; the composite copper bar structure comprises at least one welding spot setting area and a peripheral area; the thickness of the composite copper bar structure in at least one welding spot setting area is smaller than that of the composite copper bar structure in the peripheral area; the first welding spot is positioned in one welding spot arrangement area, is in contact with the surface of one side of the first copper bar, which is far away from the second copper bar, and is mutually insulated from the second copper bar; a capacitor including a first pole and a second pole; the first pole is electrically connected with the first copper bar through the first welding point, the second pole is electrically connected with the second copper bar, the height of the first welding point exceeding the whole horizontal line of the composite copper bar structure is reduced, namely, the total height of the composite copper bar structure and the first welding point is reduced, so that the occupied space of the whole structure of the capacitor assembly is reduced, and the compact design of the capacitor assembly is facilitated.
Description
Technical Field
The utility model relates to a capacitor assembly's design field especially relates to a capacitor assembly and dc-to-ac converter.
Background
With the rapid growth of new energy vehicles in recent years, in the inverter for driving the motor, a thin film capacitor for supporting a direct current voltage has become one of important components, and the technology thereof has attracted attention.
The film capacitor mainly comprises a copper bar and a capacitor core finished by winding, and is characterized in that referring to a structural schematic diagram of a capacitor assembly in the prior art shown in figure 1, the copper bar P, an insulating layer T and the copper bar N are sequentially arranged in a stacked mode, the copper bar P and the copper bar N are welded with a lead through welding spots respectively so as to be electrically connected with the capacitor core C through the lead, and the welding spot M1 and the lead L1 on the upper surface of the copper bar P are protruded, so that the overall thickness of the capacitor assembly is increased, and the compact design of an inverter is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a capacitor assembly and dc-to-ac converter to realize the compact design of capacitor assembly and dc-to-ac converter.
According to an aspect of the utility model, a capacitor assembly is provided, include:
the composite copper bar structure comprises a first copper bar and a second copper bar which are mutually insulated and arranged in a stacked mode; the composite copper bar structure comprises at least one welding spot setting area and a peripheral area; the thickness of the composite copper bar structure of at least one welding spot arrangement area is smaller than that of the composite copper bar structure of the peripheral area;
the first welding spot is positioned in one welding spot arrangement area, is in contact with the surface of one side of the first copper bar, which is far away from the second copper bar, and is insulated from the second copper bar;
a capacitor including a first pole and a second pole; the first pole is electrically connected with the first copper bar through the first welding spot, and the second pole is electrically connected with the second copper bar.
Optionally, the second copper bar comprises a first opening; the surface of one side, away from the second copper bar, of the first copper bar comprises a first groove; the first welding point is positioned in the first groove.
Optionally, at least a part of the groove bottom of the first groove is located in the first opening.
Optionally, the capacitor assembly further comprises:
and one end of the first lead is electrically connected with the first pole, and the other end of the first lead sequentially penetrates through the first opening and the groove bottom of the first groove, and is electrically connected with the first welding point after one side of the first copper bar deviates from the second copper bar is led out.
Optionally, the capacitor assembly further comprises:
the second welding spot is positioned in the other welding spot setting area, is in contact with the surface of one side, close to the first copper bar, of the second copper bar and is insulated from the first copper bar;
and one end of the second lead is electrically connected with the second pole, and the other end of the second lead penetrates through the second copper bar and is electrically connected with the second welding spot after being led out from one side of the second copper bar close to the first copper bar.
Optionally, the first copper bar comprises a second opening; at least part of the second welding points are positioned in the second openings.
Optionally, one side of the second copper bar, which is away from the first copper bar, includes a second groove;
at least a portion of the bottom of the second recess is located within the second opening.
Optionally, the capacitor assembly further includes: a first insulator;
the first insulator wraps the second lead between the second pole and the second copper bar, and the first insulator is not in contact with the bottom of the second groove.
Optionally, the capacitor assembly further comprises: a second insulator;
the second insulator wraps the first lead between the first pole and the first copper bar, and the second insulator is not in contact with the first copper bar.
According to another aspect of the present invention, there is provided an inverter, including the above capacitor module.
The embodiment of the utility model provides a capacitor assembly, thickness through setting up at least one solder joint setting area is less than the thickness of peripheral region, so, when the solder joint setting area soldering tin that is less at thickness forms first solder joint in order to connect the first utmost point of first copper bar and electric capacity, can make first solder joint surpass the whole level line of composite copper bar structure highly reduce, composite copper bar structure reduces with the total height of first solder joint promptly, thereby the occupation space of capacitor assembly overall structure has been reduced, be favorable to capacitor assembly's compact design.
It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will be readily apparent from the following specification.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a capacitor assembly of the prior art;
fig. 2 is a schematic structural diagram of a capacitor assembly according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another capacitor assembly provided by the embodiment of the present invention;
fig. 4 is a schematic structural diagram of another capacitor assembly according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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 of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 2 is a schematic structural diagram of a capacitor assembly according to an embodiment of the present invention, as shown in fig. 2, the capacitor assembly includes a composite copper bar structure 10, including a first copper bar 11 and a second copper bar 12, which are insulated from each other and stacked; the composite copper bar structure 10 comprises at least one welding spot arrangement area A1 and a peripheral area A2; the thickness of the composite copper bar structure 10 of at least one welding spot arrangement area A1 is smaller than that of the composite copper bar structure 10 of the peripheral area A2; the first welding spot 21 is positioned in one welding spot arrangement area A1, is in contact with the surface of one side of the first copper bar 11, which is far away from the second copper bar 12, and is insulated from the second copper bar 12; a capacitor 30 including a first pole 31 and a second pole 32; the first pole 31 is electrically connected with the first copper bar 11 through the first welding spot 21, and the second pole 32 is electrically connected with the second copper bar 12.
Specifically, the first copper bar 11 is electrically connected to a first pole 31 of the capacitor 30, the second copper bar 12 is electrically connected to a second pole 32 of the capacitor 30, and when the first copper bar 11 is electrically connected to an anode of an external dc power supply and the second copper bar 12 is electrically connected to a cathode of the external dc power supply, the first pole 31 of the capacitor 30 is a positive pole end and the second pole 32 is a negative pole end, so that the external power supply can supply power to the capacitor 30 through the first copper bar 11 and the second copper bar 12; the first copper bar 11 and the first pole 31 of the capacitor 30 can be electrically connected through a conductive lead, that is, the conductive lead, the first copper bar 11 and the first pole 31 of the capacitor 30 are electrically connected through the first welding spot 21 by welding; similarly, the second copper bar 12 and the second pole 32 of the capacitor 30 can be electrically connected in the same way; in addition, the thickness of the composite copper bar structure 10 in the welding spot setting area A1 is smaller than that of the peripheral area A2, and when the first welding spot 21 is formed in the welding spot setting area A1 through soldering, the height of the first welding spot 21 exceeding the whole horizontal line of the composite copper bar structure 10 can be reduced, that is, the total height of the composite copper bar structure 10 and the first welding spot 21 is reduced, so that the occupied space of the whole structure of the capacitor assembly is reduced, and the compact design of the capacitor assembly is facilitated.
For example, the composite copper bar structure 10 may further include an insulating layer 13 disposed between the first copper bar 11 and the second copper bar 12 to insulate the first copper bar 11 and the second copper bar 12.
The embodiment of the utility model provides a capacitor assembly, thickness through setting up at least one solder joint setting area is less than the thickness of peripheral region, so, when the solder joint setting area soldering tin that is less at thickness forms first solder joint in order to connect the first utmost point of first copper bar and electric capacity, can make first solder joint surpass the whole level line of composite copper bar structure highly reduce, composite copper bar structure reduces with the total height of first solder joint promptly, thereby the occupation space of capacitor assembly overall structure has been reduced, be favorable to capacitor assembly's compact design.
Alternatively, referring to fig. 2, the second copper bar 12 includes a first opening 121; the surface of one side of the first copper bar 11, which is far away from the second copper bar 12, comprises a first groove 41; the first welding spot 21 is located in the first recess 41.
Specifically, in order to reduce the height of the first welding spot 21 exceeding the composite copper bar structure 10, the first groove 41 may be disposed in the welding spot disposition area A1 of the first copper bar 11 where the first welding spot 21 is disposed, and an opening may be formed at a position opposite to the bottom of the insulating layer 13 and the bottom of the first groove 41, so that the bottom of the first groove 41 may be accommodated in the opening of the insulating layer 13 to form a groove structure, and when the first welding spot 21 is disposed on the first groove 21, the height of the first welding spot 21 exceeding the composite copper bar structure 10 may be significantly reduced; in addition, in order to avoid the contact between the bottom of the first groove 41 and the second copper bar 12, the first opening 121 can be arranged at the position where the second copper bar 12 is just opposite to the first welding point 21, that is, the first opening 121 is arranged at the position where the second copper bar 12 is just opposite to the first groove 11, so that the insulation between the first copper bar 11 and the second copper bar 12 can be ensured.
Optionally, fig. 3 is a schematic structural diagram of another capacitor assembly provided in the embodiment of the present invention, and as shown in fig. 3, at least a portion of the bottom of the first groove 41 is located in the first opening 121. In this way, the height of the first solder joints 21 exceeding the composite copper bar structure 10 can be further reduced.
Optionally, referring to fig. 2 or fig. 3, the capacitor assembly further includes a first lead 51, one end of which is electrically connected to the first electrode 31, and the other end of which sequentially penetrates through the first opening 121 and the bottom of the first groove 41, and is led out from a side of the first copper bar 11 away from the second copper bar 12 and then electrically connected to the first solder joint 21.
Specifically, the first lead 51 is a conductive lead or a lead pin, and is used for electrically connecting the first pole 31 of the capacitor 30 with the first copper bar 11, a lead hole capable of penetrating through the first lead 51 is formed in the groove bottom of the first groove 41, and the first lead 51 sequentially penetrates through the first opening 121 and the groove bottom of the first groove 41 and is connected with the first lead 51 and the first copper bar 11 by arranging a first welding point after being led out.
Optionally, with continued reference to fig. 2 or 3, the capacitor assembly further comprises: the second welding point 22 is positioned in the other welding point arrangement area A1, is in contact with the surface of one side, close to the first copper bar 11, of the second copper bar 12, and is insulated from the first copper bar 11; one end of the second lead 52 is electrically connected to the second electrode 32, and the other end thereof penetrates through the second copper bar 12, and is led out from one side of the second copper bar 12 close to the first copper bar 11 and then electrically connected to the second solder 22.
Specifically, the second lead 52 may be a conductive lead or a lead pin identical to the first lead 51, and is used to electrically connect the second electrode 32 of the capacitor 30 with the second copper bar 12, and a lead hole may be disposed at a position where the second solder 22 is disposed on the second copper bar 12, so that the second lead 52 may penetrate through the second copper bar 12 and be led out, and the second lead 52 may be electrically connected with the second copper bar 12 by disposing the second solder 22.
Optionally, with continued reference to fig. 2 or fig. 3, the first copper bar 11 includes a second opening 111; at least a portion of the second solder 22 is located within the second opening 111.
Specifically, the orthographic projection of the second welding point 22 on the second copper bar 12 can be set in the orthographic projection of the second opening 111 on the second copper bar 12, so that the insulation setting between the second welding point 22 and the first copper bar 11 is realized, and meanwhile, the operation is facilitated when the second welding point 22 is set on one side of the second copper bar 12 close to the first copper bar 11.
For example, referring to fig. 1, in order to avoid that the lead touches other conductive objects during integration to affect signal transmission between the copper bar and the capacitor, an insulator R covering the lead is generally provided, and in order that the lead can penetrate through the copper bar and be welded with the copper bar, the insulator on the lead needs to be removed at the welded part, but there are situations that cleaning of the insulator is not thorough, and especially when the lead at the welded part has a covering insulator, cold soldering is easily caused, which affects electrical connection between the lead and the copper bar, thereby affecting signal transmission between the copper bar and the capacitor and affecting electrical characteristics of the capacitor assembly.
Optionally, fig. 4 is a schematic structural diagram of another capacitor assembly provided in the embodiment of the present invention, as shown in fig. 4, a side of the second copper bar 12 away from the first copper bar 11 includes a second groove 42; at least a portion of the bottom of the second groove 42 is located within the second opening 111.
Specifically, a second groove 42 may be further disposed at the position where the second solder 22 is disposed on the second copper bar 12, the opening direction of the second groove 42 is opposite to that of the first groove 41, and the second solder 22 may be disposed at the bottom of the second groove 42 and on the side opposite to the opening direction thereof, so that the distance between the second copper bar 12 and the second pole 32 of the capacitor 30 is relatively large; since the second lead 52 on the side from which the second electrode 32 is led out generally has an insulator, when the distance between the second copper bar 12 and the second electrode 32 of the capacitor 30 is small (refer to fig. 2 or fig. 3), the insulator may cause the second solder point 22 to be soldered, which affects the electrical connection between the second lead 52 and the second copper bar 12, and thus affects the electrical characteristics of the capacitor assembly, the second groove 42 may be disposed so that the distance between the second copper bar 12 and the second electrode 32 of the capacitor 30 is large, so as to ensure that no insulator exists at the soldering position.
Optionally, referring to fig. 4, the capacitor assembly further includes a first insulator 61; the first insulator 61 covers the second lead 52 between the second pole 32 and the second copper bar 12, and the first insulator 61 is not in contact with the groove bottom of the second groove 42.
Specifically, the first insulator 61 can avoid the second lead 52 from touching other conductive objects to affect the signal transmission between the second copper bar 12 and the capacitor 30, and make the first insulator 61 only coat the second lead 52 between the second pole 32 and the second copper bar 12, and the first groove bottom of the second groove 42 is not in contact with the second lead, which can avoid the rosin joint of the second solder joint 22, ensure the electrical connection between the second copper bar 12 and the capacitor, and ensure the conductive performance of the second copper bar 12.
Optionally, referring to fig. 2, 3 or 4, the capacitor assembly further comprises a second insulator 62; the second insulator 62 covers the first lead 51 between the first pole 31 and the first copper bar 11, and the second insulator 62 is not in contact with the first copper bar 11.
Similarly, the second insulator 62 can avoid the first lead 51 from touching other conductive objects to affect the signal transmission between the first copper bar 11 and the capacitor 30, and the second insulator 62 only covers the first lead 51 between the first pole 31 and the first copper bar 11, and the first lead is not in contact with the bottom of the first copper bar 11, so that the first solder joint 21 can be avoided from being rosin-welded, the electrical connection between the first copper bar 11 and the capacitor is ensured, and the conductive performance of the first copper bar 11 is ensured. The distance between the surface of the first groove 41 on the side deviating from the first welding point 21 and the first pole 31 may be greater than the distance between the surface of the second copper bar 12 on the side deviating from the first copper bar 11 and the first pole 31, so as to ensure that the second insulator 62 is not in contact with the first copper bar 11.
Based on the same inventive concept, the embodiment of the present invention further provides an inverter, including the present invention provides a capacitor assembly, therefore including the present invention provides a capacitor assembly's technical features, can reach the present invention provides a capacitor assembly's beneficial effect, the same can refer to the above description to the embodiment of the present invention provides a capacitor assembly's description, no longer repeated here.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A capacitor assembly, comprising:
the composite copper bar structure comprises a first copper bar and a second copper bar which are mutually insulated and arranged in a stacked mode; the composite copper bar structure comprises at least one welding spot setting area and a peripheral area; the thickness of the composite copper bar structure of at least one welding spot arrangement area is smaller than that of the composite copper bar structure of the peripheral area;
the first welding spot is positioned in one welding spot arrangement area, is in contact with the surface of one side of the first copper bar, which is far away from the second copper bar, and is insulated from the second copper bar;
a capacitor including a first pole and a second pole; the first pole is electrically connected with the first copper bar through the first welding spot, and the second pole is electrically connected with the second copper bar.
2. The capacitor assembly as defined in claim 1, wherein the second copper bar includes a first opening; the surface of one side, away from the second copper bar, of the first copper bar comprises a first groove; the first welding point is positioned in the first groove.
3. The capacitor assembly of claim 2, wherein at least a portion of a bottom of the first recess is located within the first opening.
4. The capacitor assembly of claim 2, further comprising:
and one end of the first lead is electrically connected with the first pole, and the other end of the first lead sequentially penetrates through the first opening and the groove bottom of the first groove, and is electrically connected with the first welding point after one side of the first copper bar deviates from the second copper bar is led out.
5. The capacitor assembly of claim 1, further comprising:
the second welding spot is positioned in the other welding spot setting area, is in contact with the surface of one side, close to the first copper bar, of the second copper bar and is insulated from the first copper bar;
and one end of the second lead is electrically connected with the second pole, and the other end of the second lead penetrates through the second copper bar, is led out from one side of the second copper bar close to the first copper bar and is electrically connected with the second welding point.
6. The capacitor assembly as defined in claim 5, wherein the first copper bar includes a second opening; at least part of the second welding point is positioned in the second opening.
7. The capacitor assembly as defined in claim 6, wherein a side of the second copper bar facing away from the first copper bar includes a second groove;
at least a portion of the bottom of the second groove is located within the second opening.
8. The capacitor assembly as defined in claim 7, further comprising: a first insulator;
the first insulator wraps the second lead between the second pole and the second copper bar, and the first insulator is not in contact with the groove bottom of the second groove.
9. The capacitor assembly as defined in claim 4, further comprising: a second insulator;
the second insulator wraps the first lead between the first pole and the first copper bar, and the second insulator is not in contact with the first copper bar.
10. An inverter, characterized by comprising the capacitor assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221379364.1U CN217690811U (en) | 2022-06-01 | 2022-06-01 | Capacitor assembly and inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221379364.1U CN217690811U (en) | 2022-06-01 | 2022-06-01 | Capacitor assembly and inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217690811U true CN217690811U (en) | 2022-10-28 |
Family
ID=83705697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221379364.1U Active CN217690811U (en) | 2022-06-01 | 2022-06-01 | Capacitor assembly and inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217690811U (en) |
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2022
- 2022-06-01 CN CN202221379364.1U patent/CN217690811U/en active Active
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