Busbar structure and capacitor

Abstract

The utility model discloses a busbar structure and a capacitor, and relates to the technical field of capacitors, and the busbar structure comprises a positive busbar, a negative busbar and an insulating part. The insulating part is used for isolating the positive busbar from the negative busbar; the positive busbar comprises a positive DC terminal, at least one first AC terminal, a positive terminal connecting plate and a positive capacitor core connecting plate; the positive pole DC terminal, the first AC terminal and the positive pole terminal connecting plate are of an integrally connected plate structure; the negative busbar comprises a negative DC terminal, at least one second AC terminal, a negative terminal connecting plate and a negative capacitor core connecting plate; and the negative DC terminal, the second AC terminal and the negative terminal connecting plate are of an integrally connected plate structure. According to the invention, each terminal and the corresponding terminal connecting plate are integrally manufactured, so that the welding process can be reduced, the position precision of each terminal is improved, the space occupied by each terminal is reduced, and the production waste is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of capacitors, specifically to a busbar structure and a capacitor. Background Technology

[0002] Currently, capacitors are one of the core components in the electronic control systems of new energy vehicles. The connection methods between IGBT modules and capacitors in these systems are diverse, and the connection points often occupy considerable space. For capacitors with DC terminals located on the outside of the casing, the DC terminals often require longer lengths and multiple bends to meet installation requirements. Internally, to connect the DC terminals to the copper busbars, the internal copper busbars sometimes need to be extended to ensure proper soldering of the DC terminals. Similarly, the corresponding AC terminals also need to be soldered to the copper busbars one by one. This not only increases the size of the material board but also adds numerous processes, impacting production time. Utility Model Content

[0003] To address the aforementioned issues of space occupied by intermediate terminals and complex terminal welding processes, this invention provides a busbar structure and a capacitor.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A busbar structure includes a positive busbar, a negative busbar, and an insulating component; the insulating component is disposed between the positive busbar and the negative busbar at least overlapping portions to isolate the positive busbar from the negative busbar.

[0006] The positive busbar includes a positive DC terminal, at least one first AC terminal, a positive terminal connecting plate, and a positive capacitor core connecting plate; the positive DC terminal, the first AC terminal, and the positive terminal connecting plate are integrally connected plate structures; the positive terminal connecting plate is welded and fixed to the positive capacitor core connecting plate.

[0007] The negative busbar includes a negative DC terminal, at least one second AC terminal, a negative terminal connecting plate, and a negative capacitor core connecting plate; the negative DC terminal, the second AC terminal, and the negative terminal connecting plate are integrally connected plate structures; the negative terminal connecting plate and the negative capacitor core connecting plate are welded and fixed.

[0008] The positive capacitor core connecting plate and the negative capacitor core connecting plate are at least partially parallel and spaced apart, and are arranged opposite each other for arranging capacitor cores.

[0009] Optionally, the positive terminal connecting plate and the negative terminal connecting plate are located on the same side relative to the positive capacitor core connecting plate and the negative capacitor core connecting plate.

[0010] Optionally, the positive DC terminal and the positive terminal connecting plate have an L-shaped cross-section, the positive terminal connecting plate has a long strip-shaped plate structure, and the positive DC terminal is connected to the positive terminal at one end of the width direction of the positive terminal connecting plate; the first AC terminal and the positive terminal connecting plate have an L-shaped cross-section, and are located at the same end of the width direction of the positive terminal connecting plate as the positive DC terminal, and the positive DC terminal and the first AC terminal are respectively oriented towards the two sides of the thickness direction of the positive terminal connecting plate.

[0011] Optionally, the negative DC terminal and the negative terminal connecting plate have an L-shaped cross-section, the negative terminal connecting plate has a long strip-shaped plate structure, and the negative DC terminal is located at one end of the width direction of the negative terminal connecting plate; the second AC terminal and the negative terminal connecting plate have an L-shaped cross-section, and are located at the same end of the width direction of the negative terminal connecting plate as the negative DC terminal, and the negative DC terminal and the second AC terminal are respectively oriented towards both sides of the thickness direction of the negative terminal connecting plate.

[0012] Optionally, the positive terminal connecting plate and the negative terminal connecting plate are arranged side by side and overlapped in a staggered manner in the length direction, so that the positive DC terminal and the negative DC terminal face the same side, and the first AC terminal and the second AC terminal face the same side; the overlapping parts of the positive terminal connecting plate and the negative terminal connecting plate are isolated by an insulating component.

[0013] Optionally, the positive DC terminal and the first AC terminal are arranged at intervals along the length of the positive terminal connecting plate; the negative DC terminal and the second AC terminal are arranged at intervals along the length of the negative terminal connecting plate; and the first AC terminal and the second AC terminal are staggered.

[0014] Optionally, the positive capacitor core connecting plate includes a first connecting part and a second connecting part with an integral structure, the first connecting part and the second connecting part having an L-shaped structure; the first connecting part is used to connect the capacitor core, the second connecting part is used to connect the positive terminal connecting plate, and the second connecting part is welded and fixed to the positive terminal connecting plate.

[0015] Optionally, the second connecting part has an elongated plate structure and is welded to the positive terminal connecting plate.

[0016] Optionally, the negative capacitor core connecting plate includes a third connecting part and a fourth connecting part with an integral structure. The third connecting part is used to connect the capacitor core, and the fourth connecting part is used to connect the negative terminal connecting plate. The third connecting part and the first connecting part are arranged parallel to each other and spaced apart to arrange and install the capacitor core. The fourth connecting part includes an upper vertical part, a middle horizontal part and a lower vertical part. The fourth connecting part is in the shape of a "ㄣ". The upper vertical part is welded and fixed to the negative terminal connecting plate. The middle horizontal part coincides with part of the first connecting part in vertical projection. The lower end of the lower vertical part is perpendicularly connected to the third connecting part.

[0017] This utility model also provides a capacitor, including a housing, a capacitor core, and the aforementioned busbar structure. The capacitor core is arranged inside the housing, and the busbar structure is connected to the capacitor core, with at least a portion of the busbar structure extending out of the housing.

[0018] The technical solution provided by this utility model has the following beneficial effects: the positive DC terminal and the first AC terminal are integrally set on the positive terminal connection plate, and the negative DC terminal and the second AC terminal are integrally set on the negative terminal connection plate; with this design, only the terminal connection plate and the corresponding capacitor core connection plate need to be welded once, reducing the welding process of the terminals and ensuring the accuracy of the terminal position; at the same time, it can also ensure that there is sufficient current carrying area between the DC terminal and the AC terminal, thereby reducing the overall heat generation; in addition, it can reduce the space occupied by each terminal on the outside of the housing, and the capacitor core connection plate inside the housing can also be made into a plate structure to the maximum extent, with a more regular structure and reduced production waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the capacitor in this embodiment;

[0020] Figure 2 This is a schematic diagram of the busbar structure and capacitor core in this embodiment;

[0021] Figure 3 This is a schematic diagram of the busbar structure in this embodiment;

[0022] Figure 4 This is another perspective schematic diagram of the busbar structure in this embodiment;

[0023] Figure 5 This is an exploded view of the busbar structure in this embodiment;

[0024] Figure 6 This is an exploded view of the busbar structure from another perspective in this embodiment.

[0025] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Capacitor core; 3. Insulating component; 4. Positive busbar; 41. Positive DC terminal; 42. First AC terminal; 43. Positive terminal connecting plate; 44. Positive capacitor core connecting plate; 45. First connecting part; 46. Second connecting part; 5. Negative busbar; 51. Negative DC terminal; 52. Second AC terminal; 53. Negative terminal connecting plate; 54. Negative capacitor core connecting plate; 55. Third connecting part; 56. Fourth connecting part; 561. Upper vertical part; 562. Middle horizontal part; 563. Lower vertical part. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figure 1-6 This embodiment provides a capacitor, which includes a housing 1, a capacitor core 2, and a busbar structure. The capacitor core 2 is disposed inside the housing 1 and connected to the busbar structure, which at least partially extends outside the housing 1. For ease of description, ... Figure 1 The orientation of the capacitor when it is placed horizontally is described.

[0029] like Figure 2-3The busbar structure includes a positive busbar 4, a negative busbar 5, and an insulating component 3. The insulating component 3 is disposed between the positive busbar 4 and the negative busbar 5 at least overlapping portions to isolate the positive busbar 4 and the negative busbar 5, thus preventing short circuits. The positive busbar 4 includes a positive DC terminal 41, at least one first AC terminal 42, a positive terminal connection plate 43, and a positive capacitor core connection plate 44. The positive DC terminal 41, the first AC terminal 42, and the positive terminal connection plate 43 are integrally connected sheet metal structures. The positive terminal connection plate 43 is welded and fixed to the positive capacitor core connection plate 44. The negative busbar 5 includes a negative DC terminal 51, at least one second AC terminal 52, a negative terminal connection plate 53, and a negative capacitor core connection plate 54. The negative terminal connection plate 53 is welded and fixed to the negative capacitor core connection plate 54. The positive capacitor core connection plate 44 and the negative capacitor core connection plate 54 are at least partially parallel and spaced apart and directly opposite each other for arranging capacitor cores 2. In this embodiment, three first AC terminals 42 are arranged at intervals, and similarly, three second AC terminals 52 are arranged at corresponding intervals. Both capacitor core connection plates extend outside the housing 1 and are connected to their respective terminal connection plates. Relative to the positive capacitor core connection plate 44 and the negative capacitor core connection plate 54, the positive terminal connection plate 43 and the negative terminal connection plate 53 are located on the same side. This further saves space occupied by each terminal outside the housing 1.

[0030] The positive DC terminal 41 and the first AC terminal 42 are integrally mounted on a positive terminal connection plate 43, and the negative DC terminal 51 and the second AC terminal 52 are integrally mounted on a negative terminal connection plate 53. This design eliminates the need to sequentially weld each terminal to its corresponding capacitor core connection plate; instead, the terminal connection plate is welded to its corresponding capacitor core connection plate only once. This reduces the number of welding steps and minimizes terminal spacing errors caused by welding mistakes, thereby improving the positional accuracy of each terminal. Furthermore, in a fully packaged capacitor, since each terminal is integrally formed with its corresponding terminal connection plate, the DC terminal does not need to be welded to the capacitor core connection plate, allowing it to be positioned as close as possible to the AC terminals, further reducing the space occupied on the exterior of the housing 1. Simultaneously, regarding internal connections within the housing 1, since the DC terminal does not need to be welded to the internal capacitor core connection plate, the shape of the internal capacitor core connection plate can closely approximate the shape of the substrate, reducing production scrap rates. In addition, the DC and AC terminals are integrated on the corresponding terminal connection board, which ensures that there is sufficient current-carrying area between the DC and AC terminals, alleviates the current-carrying pressure on the path between the DC and AC terminals, and thus reduces the overall heat generation.

[0031] Furthermore, such as Figure 4-6The two plate structures are similar in overall structure, with the positive DC terminal 41, the first AC terminal 42 and the positive terminal connecting plate 43 forming a single plate structure, and the negative DC terminal 51, the second AC terminal 52 and the negative terminal connecting plate 53 forming a single plate structure.

[0032] Specifically, the positive DC terminal 41 and the positive terminal connecting plate 43 have an L-shaped cross-section, and the positive terminal connecting plate 43 has a long strip-shaped plate structure. The positive DC terminal 41 is connected to one end of the positive terminal connecting plate 43 in the width direction. The first AC terminal 42 and the positive terminal connecting plate 43 have an L-shaped cross-section, and are located at the same end of the positive terminal connecting plate 43 in the width direction as the positive DC terminal 41. The positive DC terminal 41 and the first AC terminal 42 are respectively oriented towards opposite sides of the positive terminal connecting plate 43 in the thickness direction.

[0033] The negative DC terminal 51 and the negative terminal connecting plate 53 have an L-shaped cross-section. The negative terminal connecting plate 53 has a long strip-shaped structure, and the negative DC terminal 51 is connected to one end of the negative terminal connecting plate 53 in the width direction. The second AC terminal 52 has an L-shaped structure with the negative terminal connecting plate 53 and is located at the same end of the negative terminal connecting plate 53 in the width direction as the negative DC terminal 51. The negative DC terminal 51 and the second AC terminal 52 are respectively oriented towards opposite sides of the negative terminal connecting plate 53 in the thickness direction.

[0034] The positive DC terminal 41 and the first AC terminal 42 are arranged at intervals along the length of the positive terminal connecting plate 43. The negative DC terminal 51 and the second AC terminal 52 are arranged at intervals along the length of the negative terminal connecting plate. The positive terminal connecting plate 43 and the negative terminal connecting plate 53 are arranged side by side and staggered in the length direction, so that the positive DC terminal 41 and the negative DC terminal 51 face the same side, and the first AC terminal 42 and the second AC terminal 52 face the other side together, and the first AC terminal 42 and the second AC terminal 52 are arranged alternately. The overlapping parts of the positive terminal connecting plate 43 and the negative terminal connecting plate 53 are isolated by an insulating member 3. In this way, the positive terminal connecting plate 43, the negative terminal connecting plate 53, and each terminal occupy less space outside the housing 1.

[0035] like Figure 5 The positive capacitor core connecting plate 44 includes a first connecting part 45 and a second connecting part 46, which are integrally formed. The first connecting part 45 and the second connecting part 46 are L-shaped and can be formed by bending a single sheet of material, thereby reducing production waste. The first connecting part 45 is a plate-shaped structure used to connect the capacitor core 2. The second connecting part 46 is a long strip-shaped plate structure and is welded to the surface of the positive terminal connecting plate 43; thus, welding between the second connecting part 46 and the positive terminal connecting plate 43 is more convenient and can ensure accurate welding position.

[0036] The negative capacitor core connecting plate 54 includes a third connecting part 55 and a fourth connecting part 56, which are integrally structured and have a stepped shape. They are also formed by bending a single sheet material to reduce production waste. The third connecting part 55 is used to connect the capacitor core 2, and the fourth connecting part 56 is used to connect the negative terminal connecting plate 53. The third connecting part 55 is at least partially parallel to and spaced apart from the first connecting part 45, and has an overlapping portion in its vertical projection, used for arranging and mounting the capacitor core 2. The fourth connecting part 56 is U-shaped, including an upper vertical part 561, a middle horizontal part 562, and a lower vertical part 563. The upper vertical part 561 is welded to the surface of the negative terminal connecting plate 53. The middle horizontal part 562 overlaps with the first connecting part 45 in its vertical projection. The lower end of the lower vertical part 563 is vertically connected to the third connecting part 55. The presence of the lower vertical part 563 creates a gap between the first connecting part 45 and the third connecting part 55, used for arranging and mounting the capacitor core 2. Furthermore, the insulating component 3 is made of insulating paper, which is sandwiched between the overlapping and bonding parts of the positive busbar 4 and the negative busbar 5, forming a "ㄣ" shaped structure to isolate the positive busbar 4 and the negative busbar 5.

[0037] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A busbar structure, characterized in that: It includes a positive busbar, a negative busbar, and an insulating component; the insulating component is disposed between the positive busbar and the negative busbar at least overlapping portions to isolate the positive busbar and the negative busbar. The positive busbar includes a positive DC terminal, at least one first AC terminal, a positive terminal connecting plate, and a positive capacitor core connecting plate; the positive DC terminal, the first AC terminal, and the positive terminal connecting plate are integrally connected plate structures; the positive terminal connecting plate is welded and fixed to the positive capacitor core connecting plate. The negative busbar includes a negative DC terminal, at least one second AC terminal, a negative terminal connecting plate, and a negative capacitor core connecting plate; the negative DC terminal, the second AC terminal, and the negative terminal connecting plate are integrally connected plate structures; the negative terminal connecting plate and the negative capacitor core connecting plate are welded and fixed. The positive capacitor core connecting plate and the negative capacitor core connecting plate are at least partially parallel and spaced apart, and are arranged opposite each other for arranging capacitor cores.

2. The busbar structure according to claim 1, characterized in that: The positive terminal connecting plate and the negative terminal connecting plate are located on the same side relative to the positive capacitor core connecting plate and the negative capacitor core connecting plate.

3. The busbar structure according to claim 2, characterized in that: The positive DC terminal and the positive terminal connecting plate have an L-shaped cross-section, and the positive terminal connecting plate has a long strip-shaped plate structure. The positive DC terminal and the positive terminal are located at one end of the positive terminal connecting plate in the width direction. The first AC terminal and the positive terminal connecting plate have an L-shaped cross-section and are located at the same end of the positive terminal connecting plate in the width direction as the positive DC terminal. The positive DC terminal and the first AC terminal are respectively oriented towards the two sides of the positive terminal connecting plate in the thickness direction.

4. The busbar structure according to claim 3, characterized in that: The negative DC terminal and the negative terminal connecting plate have an L-shaped cross-section, and the negative terminal connecting plate has a long strip-shaped plate structure. The negative DC terminal is located at one end of the width direction of the negative terminal connecting plate. The second AC terminal and the negative terminal connecting plate have an L-shaped cross-section and are located at the same end of the width direction of the negative terminal connecting plate as the negative DC terminal. The negative DC terminal and the second AC terminal are respectively oriented towards the two sides of the thickness direction of the negative terminal connecting plate.

5. A busbar structure according to claim 4, characterized in that: The positive terminal connecting plate and the negative terminal connecting plate are arranged side by side and overlapped in a staggered manner along the length direction, so that the positive DC terminal and the negative DC terminal face the same side, and the first AC terminal and the second AC terminal face the same side; the overlapping parts of the positive terminal connecting plate and the negative terminal connecting plate are isolated by an insulating component.

6. A busbar structure according to claim 5, characterized in that: The positive DC terminal and the first AC terminal are arranged at intervals along the length of the positive terminal connecting plate; the negative DC terminal and the second AC terminal are arranged at intervals along the length of the negative terminal connecting plate; the first AC terminal and the second AC terminal are staggered.

7. A busbar structure according to claim 1, characterized in that: The positive capacitor core connecting plate includes a first connecting part and a second connecting part with an integral structure. The first connecting part and the second connecting part are in an L-shaped structure. The first connecting part is used to connect the capacitor core, and the second connecting part is used to connect the positive terminal connecting plate. The second connecting part is welded and fixed to the positive terminal connecting plate.

8. A busbar structure according to claim 7, characterized in that: The second connecting part has a long strip-shaped plate structure and is welded to the positive terminal connecting plate.

9. A busbar structure according to claim 7, characterized in that: The negative capacitor core connecting plate includes a third connecting part and a fourth connecting part with an integral structure. The third connecting part is used to connect the capacitor core, and the fourth connecting part is used to connect the negative terminal connecting plate. The third connecting part and the first connecting part are arranged parallel to each other and spaced apart to arrange and install the capacitor core. The fourth connecting part includes an upper vertical part, a middle horizontal part and a lower vertical part. The fourth connecting part is in the shape of a "ㄣ". The upper vertical part is welded and fixed to the negative terminal connecting plate. The middle horizontal part coincides with part of the first connecting part in vertical projection. The lower end of the lower vertical part is perpendicularly connected to the third connecting part.

10. A capacitor, characterized in that: It includes a housing, a capacitor core, and a busbar structure as described in any one of claims 1-9, wherein the capacitor core is arranged inside the housing, the busbar structure is connected to the capacitor core, and the busbar structure extends at least partially out of the housing.

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