A busbar structure of capacitor and automobile capacitor

Abstract

The present invention discloses a busbar structure of a capacitor and an automobile capacitor, wherein the busbar structure comprises an upper connecting plate, a lower connecting plate, a plurality of capacitor cores, at least one first upper lead-out terminal group, and a side lead-out terminal group, wherein the capacitor core is electrically connected between the upper connecting plate and the lower connecting plate; the first upper lead-out terminal group comprises a first lead-out terminal and a second lead-out terminal that are matched in pairs, and the side lead-out terminal group comprises a third lead-out terminal and a fourth lead-out terminal that are matched in pairs; one side of the upper connecting plate is provided with a first side connecting plate extending downward, one side of the lower connecting plate is provided with a second side connecting plate extending upward, and the first side connecting plate and the second side connecting plate are located on different sides; the first lead-out terminal is electrically connected to the upper connecting plate, the second lead-out terminal and the fourth lead-out terminal are electrically connected to the second side connecting plate, and the third lead-out terminal is electrically connected to the first side connecting plate through a first connecting sheet. The present invention greatly improves the current carrying capacity of the upper connecting plate and the lower connecting plate, and has sufficient creepage distance.

Description

Technical Field

[0001] The invention relates to the field of capacitors, and in particular to a busbar structure of a capacitor and an automobile capacitor. Background Art

[0002] The busbar structure of the capacitor in the prior art generally includes a busbar and a plurality of capacitor cores. The busbar is composed of a conductive upper connecting plate and a lower connecting plate, and the capacitor core is electrically connected between the upper connecting plate and the lower connecting plate. The busbar is also provided with a plurality of upper lead-out terminal groups and a side lead-out terminal group. The upper lead-out terminal group is used to connect to the IGBT module. It mainly absorbs the high-amplitude pulsating current requested by the inverter to the "DC-Link", and prevents it from generating a high-amplitude pulsating voltage on the impedance of the "DC-Link", so that the voltage fluctuation of the inverter power supply is kept within an acceptable range, and prevents the voltage overshoot and instantaneous current from the "DC-Link" from affecting the inverter. The side lead-out terminal group is used to connect to the power supply, mainly to connect the busbar and transmit large current to subsequent parts. In order to reasonably arrange the above upper lead-out terminal group and the side lead-out terminal group and make the overall structure more compact, a busbar structure in the prior art is provided with downwardly bent side connecting plates on each side of the upper connecting plate and the lower connecting plate for arranging the corresponding lead-out terminals. Since the connecting plates on both sides are located on the same side, the connecting plates on both sides must be made narrower in order to ensure that there is a sufficient creepage distance between the two. However, making the connecting plates on both sides narrower will result in limited increase in the current-carrying capacity of the upper and lower connecting plates. Summary of the invention

[0003] The purpose of the present invention is to provide a busbar structure of a capacitor and an automotive capacitor that can take into account both the creepage distance and the current carrying capacity of an upper connecting plate and a lower connecting plate in view of the technical problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a busbar structure of a capacitor, comprising an upper connecting plate, a lower connecting plate, a plurality of capacitor cores, at least one first upper lead-out terminal group, and a side lead-out terminal group, wherein the capacitor core is electrically connected between the upper connecting plate and the lower connecting plate; the first upper lead-out terminal group comprises a first lead-out terminal and a second lead-out terminal that are matched in pairs, and the side lead-out terminal group comprises a third lead-out terminal and a fourth lead-out terminal that are matched in pairs; a first side connecting plate extending downward is provided on one side of the upper connecting plate, and a second side connecting plate extending upward is provided on one side of the lower connecting plate, and the first side connecting plate and the second side connecting plate are located on different sides; the first lead-out terminal is electrically connected to the upper connecting plate, the second lead-out terminal and the fourth lead-out terminal are electrically connected to the second side connecting plate, and the third lead-out terminal is electrically connected to the first side connecting plate through a first connecting sheet, and the first upper lead-out terminal group is located on the inner side of the second side connecting plate, and the side lead-out terminal group is located on the outer side of the second side connecting plate.

[0005] Furthermore, the number of the first upper lead-out terminal groups is at least two, wherein one of the first upper lead-out terminal groups and the side lead-out terminal group are respectively located on the inner side and the outer side of one end of the second side connecting plate.

[0006] Furthermore, it also includes a second upper lead-out terminal group, which includes a fifth lead-out terminal and a sixth lead-out terminal that are matched in pairs, and the lower connecting plate is also provided with a third side connecting plate extending upward, the third side connecting plate and the first side connecting plate are located on the opposite side, and the third side connecting plate and the second side connecting plate are located on the adjacent side; the fifth lead-out terminal is electrically connected to the upper connecting plate, and the sixth lead-out terminal is electrically connected to the third side connecting plate through a second connecting sheet.

[0007] Furthermore, the third lead-out end includes a U-shaped piece with an opening facing downward and the first connecting piece, the first connecting piece is integrally formed on the side of the U-shaped piece and is electrically connected to the outer side of the first side connecting plate, and the U-shaped piece is fitted on the outer side of the second side connecting plate; the fourth lead-out end is in a U-shape with an opening facing downward, and one side of it is electrically connected to the outer side or inner side of the second side connecting plate, and the other side of it is fitted on the outer side of the second side connecting plate.

[0008] Furthermore, the first lead-out end is L-shaped, and its horizontal piece is electrically connected to the edge of one end of the upper connecting plate close to the second side connecting plate, and its vertical piece is vertically upward; the second lead-out end is U-shaped, and its bottom vertical pieces are respectively electrically connected to the second side connecting plates, its horizontal pieces are respectively located above the upper connecting plates, and its top vertical pieces are respectively vertically upward.

[0009] Furthermore, the vertical piece of the first lead-out terminal and the vertical piece at the top of the second lead-out terminal are arranged in a row along the length direction of the second side connecting plate, and / or the bottom surface of the horizontal piece of the second lead-out terminal is provided with an insulating film.

[0010] Furthermore, the fifth lead-out end is L-shaped, and its horizontal piece is electrically connected to the edge of one end of the upper connecting plate close to the second side connecting plate, and its vertical piece is vertically upward; the sixth lead-out end includes an L-shaped piece and the second connecting piece, the second connecting piece is integrally formed on the horizontal piece side of the L-shaped piece, and is electrically connected to the outer side of the second side connecting plate; the vertical piece of the L-shaped piece is vertically upward.

[0011] Furthermore, the first lead-out terminal, the second lead-out terminal, the third lead-out terminal, the fourth lead-out terminal, the fifth lead-out terminal, and the sixth lead-out terminal are respectively provided with a first rivet hole and a welding hole for realizing electrical connection, and the upper connecting plate, the first side connecting plate, the second side connecting plate, and the third side connecting plate are respectively provided with a second rivet hole for cooperating with the corresponding first rivet hole.

[0012] Furthermore, the upper connecting plate is provided with a plurality of first through holes corresponding one-to-one to the plurality of capacitor cores, and the lower connecting plate is provided with a plurality of second through holes corresponding one-to-one to the plurality of capacitor cores, and the edge of each first through hole is respectively welded with the top end of the corresponding capacitor core to form at least one welding point, and the edge of each second through hole is respectively welded with the bottom end of the corresponding capacitor core to form at least one welding point.

[0013] The present invention further provides an automotive capacitor, comprising a housing and a busbar structure of the capacitor described in the present invention, wherein the busbar structure is accommodated in the housing.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The first side connecting plate and the second side connecting plate are located on different sides and do not affect each other. Therefore, the width of the first side connecting plate and the second side connecting plate can be reasonably designed based on the principle of taking into account the creepage distance and current carrying capacity of the upper connecting plate and the lower connecting plate, so that the current carrying capacity of the upper connecting plate and the lower connecting plate is greatly improved, while ensuring that there is sufficient creepage distance between the upper connecting plate and the lower connecting plate. In addition, the first lead-out terminal is electrically connected to the upper connecting plate, the second lead-out terminal and the fourth lead-out terminal are electrically connected to the second side connecting plate, and the third lead-out terminal is electrically connected to the first side connecting plate through a first connecting sheet, and the first upper lead-out terminal group is located on the inner side of the second side connecting plate, and the side lead-out terminal group is located on the outer side of the second side connecting plate, so that the layout of the first upper lead-out terminal group and the side lead-out terminal group is more reasonable, thereby making the overall structure more compact.

[0016] 2. The number of the first upper lead-out terminal groups is at least two, wherein one of the first upper lead-out terminal groups and the side lead-out terminal group are respectively located on the inner side and the outer side of one end of the second side connecting plate, so that the layout of the densely distributed lead-out terminals at one end of the second side connecting plate is more reasonable and does not interfere with each other.

[0017] 3. The provision of the third side connection plate not only facilitates the connection of the sixth lead-out terminal, but also can further improve the current-carrying capacity of the lower connection plate, and the third side connection plate can cooperate with the first side connection plate to limit the capacitor core.

[0018] 4. Each lead-out terminal is separately provided with the upper connecting plate and the lower connecting plate, which not only facilitates the punching processing of the upper connecting plate and the lower connecting plate and reduces the processing cost, but also makes it convenient to select and set the material and thickness of each lead-out terminal according to actual needs. The structure for electrical connection is the first rivet hole and the welding hole respectively provided on each lead-out terminal, making the connection of each lead-out terminal more convenient and reliable.

[0019] 5. The provision of the first through hole and the second through hole makes the production process of the upper connecting plate and the lower connecting plate simpler and requires less consumables, thereby helping to reduce the production cost of the busbar. In addition, the capacitor shell can also be filled with epoxy resin through the gap between the first through hole and the capacitor core, making the epoxy resin filling faster and the epoxy resin distribution more uniform.

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the busbar structure of a capacitor and the automotive capacitor of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is an exploded schematic diagram of the busbar structure of the present invention in Example 1 (including the housing);

[0022] Figure 2 It is a schematic structural diagram of the upper connecting plate and the corresponding lead-out terminal of the present invention in the first embodiment in a matching state;

[0023] Figure 3 1 is a schematic structural diagram of the lower connecting plate and the corresponding lead-out terminal of the present invention in the first embodiment in a matching state;

[0024] Figure 4 2 is a schematic diagram of the three-dimensional structure of the busbar structure of the present invention in Embodiment 1;

[0025] Figure 5 is a schematic diagram of the three-dimensional structure of the automotive capacitor of the present invention in the first embodiment;

[0026] Figure 6 It is a schematic structural diagram of the lower connecting plate and the corresponding lead-out terminal of the second embodiment of the present invention in a matching state. DETAILED DESCRIPTION

[0027] For examples, see Figure 1-Figure 4As shown, a busbar structure of a capacitor of the present invention comprises an upper connecting plate 2, a lower connecting plate 3, a plurality of capacitor cores 1, at least one first upper lead-out terminal group, and a side lead-out terminal group, wherein the capacitor core 1 is electrically connected between the upper connecting plate 2 and the lower connecting plate 3; the first upper lead-out terminal group comprises a first lead-out terminal 4 and a second lead-out terminal 5 that are matched in pairs, and the side lead-out terminal group comprises a third lead-out terminal 6 and a fourth lead-out terminal 7 that are matched in pairs; a first side connecting plate 21 extending downward is provided on one side of the upper connecting plate 2, and the first side connecting plate 21 is specifically located on the side where one of the wide sides of the upper connecting plate 2 is located. A second side connecting plate 31 extending upward is provided on one side of the lower connecting plate 3, and the second side connecting plate 31 is specifically located on the side where one of the long sides of the lower connecting plate 3 is located. The first side connecting plate 21 and the second side connecting plate 31 are located on different sides. The first lead-out terminal 4 is electrically connected to the upper connecting plate 2, the second lead-out terminal 5 and the fourth lead-out terminal 7 are electrically connected to the second side connecting plate 31, the third lead-out terminal 6 is electrically connected to the first side connecting plate 21 through a first connecting piece 62, and the first upper lead-out terminal group is located on the inner side of the second side connecting plate 31, and the side lead-out terminal group is located on the outer side of the second side connecting plate 31. The inner side of the second side connecting plate 31 refers to the side where the inner side surface of the second side connecting plate 31 (the inner side surface faces the capacitor core 1) is located, and the outer side of the second side connecting plate 31 refers to the side where the outer side surface of the second side connecting plate 31 (the outer side surface faces away from the capacitor core 1) is located. The first upper lead-out terminal group being located on the inner side of the second side connecting plate 31 means that the first upper lead-out terminal group (i.e., the first lead-out terminal 4 and the second lead-out terminal 5) do not extend beyond the outer side of the second side connecting plate 31, and the side lead-out terminal group being located on the outer side of the second side connecting plate 31 means that at least the portion of the side lead-out terminal group (i.e., the third lead-out terminal 6 and the fourth lead-out terminal 7) connected to the external device is fitted on the outer side of the second side connecting plate 31.

[0028] In this embodiment, the number of the first upper lead-out terminal groups is two, but not limited thereto. One of the first upper lead-out terminal groups corresponds to the inside and outside of the side lead-out terminal group. Specifically, one of the first upper lead-out terminal groups and the side lead-out terminal are respectively located at the inside and outside of one end of the second side connecting plate 31. The one end of the second side connecting plate 31 is specifically the right end of the second side connecting plate 31, but not limited thereto.

[0029] In this embodiment, the present invention further includes a second upper lead-out terminal group, which includes a fifth lead-out terminal 8 and a sixth lead-out terminal 9 that are matched in pairs, and the lower connecting plate 3 is further provided with a third side connecting plate 32 extending upward, the third side connecting plate 32 is located on the opposite side to the first side connecting plate 21, and the third side connecting plate 32 is located on the adjacent side to the second side connecting plate 31; the fifth lead-out terminal 8 is electrically connected to the upper connecting plate 2, and the sixth lead-out terminal 9 is electrically connected to the third side connecting plate 32 through a second connecting piece 92. The first side connecting plate 21 is specifically formed by partially bending the upper connecting plate 2 downward, and similarly, the second side connecting plate 31 and the third side connecting plate 32 are respectively formed by partially bending the lower connecting plate 3 upward.

[0030] In this embodiment, the third lead-out terminal 6 includes a U-shaped piece 61 with an opening facing downward and the first connecting piece 62. The first connecting piece 62 is integrally formed on the side of the U-shaped piece 61 and is electrically connected to the outer side of the first side connecting plate 21. The U-shaped piece 61 is fitted on the outer side of the second side connecting plate 31; the fourth lead-out terminal 7 is in a U-shape with an opening facing downward, and one side of it is electrically connected to the outer side of the second side connecting plate 31, and the other side is used to connect to an external device and is fitted on the outer side of the second side connecting plate 31.

[0031] In this embodiment, the first lead-out terminal 4 is L-shaped, and its horizontal piece is electrically connected to the edge of one end of the upper connecting plate 2 close to the second side connecting plate 31, and its vertical piece is vertically upward; the second lead-out terminal 5 is U-shaped, and its bottom vertical pieces are respectively electrically connected to the second side connecting plate 31, and its horizontal pieces are respectively located above the upper connecting plate 2, and its top vertical pieces are respectively vertically upward. Since the horizontal piece of the second lead-out terminal 5 is close to the upper connecting plate 2, an insulating film is provided on the bottom surface of the horizontal piece of the second lead-out terminal 5 to prevent the horizontal piece of the second lead-out terminal 5 from accidentally making electrical contact with the upper connecting plate 2. The vertical piece of the first lead-out terminal 4 and the vertical piece at the top of the second lead-out terminal 5 are arranged in a row along the length direction of the second side connecting plate 31.

[0032] In this embodiment, the fifth lead-out terminal 8 is L-shaped, and its horizontal piece is electrically connected to the edge of one end of the upper connecting plate 2 close to the second side connecting plate 31, and its vertical piece is vertically upward; the sixth lead-out terminal 9 includes an L-shaped piece 91 and the second connecting piece 92, the second connecting piece 92 is integrally formed on the horizontal piece side of the L-shaped piece 91, and is electrically connected to the outer side of the second side connecting plate 31; the vertical piece of the L-shaped piece 91 is vertically upward. The vertical piece of the fifth lead-out terminal 8, the vertical piece of the L-shaped piece 91 of the sixth lead-out terminal 9, the vertical piece of the first lead-out terminal 4, and the vertical piece at the top of the second lead-out terminal 5 are arranged in a row along the length direction of the second side connecting plate 31.

[0033] In this embodiment, each lead end (i.e., the first lead end 4, the second lead end 5, the third lead end 6, the fourth lead end 7, the fifth lead end 8, and the sixth lead end 9) is respectively provided with a first rivet hole 41 / 51 / 621 / 71 / 81 / 921 and a welding hole 42 / 52 / 622 / 72 / 82 / 922 for achieving electrical connection, and the number of the first rivet holes is two, but not limited thereto, and the two first rivet holes are distributed on the diagonal line of the welding hole. The upper connecting plate 2, the first side connecting plate 21, the second side connecting plate 31, and the third side connecting plate 32 are respectively provided with second rivet holes 22 / 23 / 211 / 311 / 321 for cooperating with the corresponding first rivet holes. In this way, each lead-out terminal can be first riveted with the corresponding second riveting hole through the first riveting hole, and then the edge of the first welding hole can be spot-welded with the corresponding connecting plate (i.e., the upper connecting plate 2, the first side connecting plate 21, the second side connecting plate 31, and the third side connecting plate 32), so that the connection of each lead-out terminal is more convenient and reliable. Since each lead-out terminal is separately arranged from the corresponding connecting plate, the present invention not only facilitates the punching processing of the upper connecting plate 2 and the lower connecting plate 3 and reduces the processing cost, but also makes it convenient to select and set the material and thickness of each lead-out terminal according to actual needs.

[0034] In this embodiment, the upper connecting plate 2 is provided with a plurality of first through holes 24 corresponding to the plurality of capacitor cores 1, and the lower connecting plate 3 is provided with a plurality of second through holes 33 corresponding to the plurality of capacitor cores 1. The edge of each first through hole 24 is respectively welded with the top of the corresponding capacitor core 1 to form at least one welding point, and the edge of each second through hole 33 is respectively welded with the bottom of the corresponding capacitor core 1 to form at least one welding point. Specifically, the first through hole 24 and the second through hole 33 are circular holes, but are not limited thereto. The edge of each first through hole 24 is respectively spot welded with the top of the corresponding capacitor core 1 to form two or more welding points; the edge of each second through hole 33 is respectively spot welded with the bottom of the corresponding capacitor core 1 to form at least two or more welding points.

[0035] The busbar structure of a capacitor of the present invention has a first side connecting plate 21 and a second side connecting plate 31 located on different sides and do not affect each other. Therefore, the width of the first side connecting plate 21 and the second side connecting plate 31 can be reasonably designed according to the principle of taking into account the creepage distance and current carrying capacity of the upper connecting plate 2 and the lower connecting plate 3, so that the current carrying capacity of the upper connecting plate 2 and the lower connecting plate 3 is greatly improved, and at the same time, it is ensured that there is a sufficient creepage distance between the upper connecting plate 2 and the lower connecting plate 3. In addition, the first lead-out terminal 4 is electrically connected to the upper connecting plate 2, the second lead-out terminal 5 and the fourth lead-out terminal 7 are electrically connected to the second side connecting plate 31, and the third lead-out terminal 6 is electrically connected to the first side connecting plate 21 through a first connecting sheet 61, and the first upper lead-out terminal group is located on the inner side of the second side connecting plate, and the side lead-out terminal group is located on the outer side of the second side connecting plate, so that the layout of the first upper lead-out terminal group and the side lead-out terminal group is more reasonable, thereby making the overall structure more compact.

[0036] See also Figure 1-Figure 5 As shown, an automotive capacitor of the present invention comprises a housing 10 , and also comprises a busbar structure of a capacitor as described in the present invention, and the busbar structure is accommodated in the housing 10 .

[0037] In this embodiment, two opposite sides of the housing 10 are respectively provided with a clearance groove 101 leading to the inside of the housing, wherein one clearance groove makes way for the first connecting piece 62 of the third lead-out terminal 6, and the other clearance groove makes way for the sixth lead-out terminal 9. In this way, the housing 10 of the present invention does not need to be enlarged, and can be adapted to the busbar structure, thereby reducing the material cost of the housing, and basically does not increase the overall space occupied by the capacitor, and keeps the internal layout of the capacitor compact. The U-shaped piece 61 of the third lead-out terminal is used for connecting with an external device, and the side of the fourth lead-out terminal 7 is used for connecting with an external device. The side is matched with the outside of the housing 10, and the nuts 102 provided on the outer side of the housing are respectively used to match the screws with the external device.

[0038] In this embodiment, the housing 10 is filled with epoxy resin, which can be poured into the gap between the first through hole 24 and the capacitor core, so that the epoxy resin filling is faster and the epoxy resin is more evenly distributed. The epoxy resin prevents the risk of discharge of the tip protrusion formed by improper spot welding.

[0039] Embodiment 2

[0040] See also Figure 6 As shown, a busbar structure of a capacitor of the present invention is different from the above-mentioned embodiment 1 in that one side of the fourth lead-out terminal 7 is electrically connected to the inner side of the second side connecting plate 31 and is superimposed with the vertical piece at the bottom of one of the second lead-out terminals 5. The other side of the fourth lead-out terminal 7 is used to connect to an external device and is matched with the outer side of the second side connecting plate 31.

[0041] The above embodiments are only used to further illustrate a busbar structure of a capacitor and an automotive capacitor of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. A busbar structure of a capacitor, comprising an upper connecting plate, a lower connecting plate, a plurality of capacitor cores, at least one first upper lead terminal group, and a side lead terminal group, wherein the capacitor core is electrically connected between the upper connecting plate and the lower connecting plate; the first upper lead terminal group comprises a first lead terminal and a second lead terminal in pairs, and the side lead terminal group comprises a third lead terminal and a fourth lead terminal in pairs; characterized in that: A first side connecting plate extending downward is provided on one side of the upper connecting plate, and a second side connecting plate extending upward is provided on one side of the lower connecting plate, and the first side connecting plate and the second side connecting plate are located on different sides; the first lead-out terminal is electrically connected to the upper connecting plate, the second lead-out terminal and the fourth lead-out terminal are electrically connected to the second side connecting plate, and the third lead-out terminal is electrically connected to the first side connecting plate through a first connecting sheet, and the first upper lead-out terminal group is located on the inner side of the second side connecting plate, and the side lead-out terminal group is located on the outer side of the second side connecting plate; the lower connecting plate is also provided with a third side connecting plate extending upward, and the third side connecting plate and the first side connecting plate are located on the opposite side, and the third side connecting plate and the second side connecting plate are located on the adjacent side.

2. The busbar structure of the capacitor according to claim 1, characterized in that: The number of the first upper lead-out terminal groups is at least two, wherein one first upper lead-out terminal group and the side lead-out terminal group are respectively located at the inner side and the outer side of one end of the second side connecting plate.

3. The busbar structure of the capacitor according to claim 1, characterized in that: It also includes a second upper lead terminal group, which includes a fifth lead terminal and a sixth lead terminal that are matched in pair. The fifth lead terminal is electrically connected to the upper connecting plate, and the sixth lead terminal is electrically connected to the third side connecting plate through a second connecting sheet.

4. The busbar structure of the capacitor according to claim 1, characterized in that: The third lead-out end includes a U-shaped piece with an opening facing downward and the first connecting piece, the first connecting piece is integrally formed on the side of the U-shaped piece and is electrically connected to the outer side of the first side connecting plate, and the U-shaped piece is fitted on the outer side of the second side connecting plate; the fourth lead-out end is in a U-shape with an opening facing downward, and one side of it is electrically connected to the outer side or inner side of the second side connecting plate, and the other side of it is fitted on the outer side of the second side connecting plate.

5. The busbar structure of the capacitor according to claim 1, characterized in that: The first lead-out end is L-shaped, and its horizontal piece is electrically connected to the edge of one end of the upper connecting plate close to the second side connecting plate, and its vertical piece is vertically upward; the second lead-out end is U-shaped, and its bottom vertical pieces are respectively electrically connected to the second side connecting plates, its horizontal pieces are respectively located above the upper connecting plates, and its top vertical pieces are respectively vertically upward.

6. The busbar structure of the capacitor according to claim 5, characterized in that: The vertical piece of the first lead-out terminal and the vertical piece at the top of the second lead-out terminal are arranged in a row along the length direction of the second side connecting plate, and / or, an insulating film is provided on the bottom surface of the horizontal piece of the second lead-out terminal.

7. The busbar structure of the capacitor according to claim 3, characterized in that: The fifth lead-out end is L-shaped, and its horizontal piece is electrically connected to the edge of one end of the upper connecting plate close to the second side connecting plate, and its vertical piece is vertically upward; the sixth lead-out end includes an L-shaped piece and the second connecting piece, the second connecting piece is integrally formed on the horizontal piece side of the L-shaped piece, and is electrically connected to the outer side of the second side connecting plate; the vertical piece of the L-shaped piece is vertically upward.

8. The busbar structure of the capacitor according to claim 3, characterized in that: The first lead-out terminal, the second lead-out terminal, the third lead-out terminal, the fourth lead-out terminal, the fifth lead-out terminal and the sixth lead-out terminal are respectively provided with a first rivet hole and a welding hole for realizing electrical connection, and the upper connecting plate, the first side connecting plate, the second side connecting plate and the third side connecting plate are respectively provided with a second rivet hole for cooperating with the corresponding first rivet hole.

9. The busbar structure of the capacitor according to claim 1, characterized in that: The upper connecting plate is provided with a plurality of first through holes corresponding one-to-one to the plurality of capacitor cores, and the lower connecting plate is provided with a plurality of second through holes corresponding one-to-one to the plurality of capacitor cores, and the edge of each first through hole is respectively welded with the top end of the corresponding capacitor core to form at least one welding point, and the edge of each second through hole is respectively welded with the bottom end of the corresponding capacitor core to form at least one welding point.

10. An automotive capacitor, comprising a housing, characterized in that: It also comprises a busbar structure of the capacitor according to any one of claims 1 to 9, wherein the busbar structure is accommodated in the housing.

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