Thin film capacitor assembly

Abstract

The utility model provides a film capacitor assembly comprising a plurality of capacitor cores and a housing, the housing is provided with an accommodating cavity and a side opening, and the plurality of capacitor cores are arranged in the accommodating cavity. The opening side of the shell is fixedly connected with a limiting cover, and a plurality of limiting holes are formed in the limiting cover so that leading-out terminals of the capacitor cores can stretch out of the same side of the shell. According to the utility model, the plurality of capacitor cores are integrated in the accommodating cavity, the limiting cover is fixedly connected to the opening side of the shell, and the leading-out terminals of the plurality of capacitor cores extend towards the direction close to the limiting cover and penetrate out of the plurality of limiting holes of the limiting cover. As the relative position between the shell and the limiting cover is fixed, the relative positions between the leading-out terminals of the plurality of capacitor cores and the shell are fixed. On the premise that the leading-out terminals of a plurality of capacitor cores are led out from the same side of the shell at the same time, namely, the multi-pin function of a single capacitor core is achieved, the limiting cover is adopted to limit the leading-out terminals, and a limiting clamp does not need to be additionally arranged.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to a thin-film capacitor assembly. Background Technology

[0002] Film capacitors are widely used as basic passive components in electronic devices and other fields, with pin-type film capacitors being particularly common. Pin-type film capacitors mainly consist of a capacitor core, leads, a capacitor casing, and encapsulating resin.

[0003] Pin-type film capacitors are typically mounted in parallel with multiple capacitors, soldered together on a PCB board. To improve power density and reduce BOM (Bill of Materials) quantities, this project integrates multiple leads into a single hollow housing, with multiple leads (terminals) extending outwards, creating a multi-lead film capacitor as per customer requirements. However, with existing film capacitors, the leads misalign with the housing, resulting in significant cumulative tolerances. This leads to some leads not matching the PCB board during assembly, causing structural dimensional issues. Furthermore, existing film capacitors require limiting fixtures, increasing production costs.

[0004] Therefore, there is a need for a thin-film capacitor assembly that integrates multiple capacitor cores, with the leads of the multiple capacitor cores extending from the same side of the housing, and uses a limiting cover to fix the leads, eliminating the need for additional limiting clamps and reducing production costs. Utility Model Content

[0005] To overcome the problems existing in related technologies, the purpose of this utility model is to provide a thin-film capacitor assembly that integrates multiple capacitor cores. The lead terminals of the multiple capacitor cores are led out from the same side of the housing, and the lead terminals are fixed by a limiting cover, eliminating the need for additional limiting clamps and reducing production costs.

[0006] A thin-film capacitor assembly includes a plurality of capacitor cores and a housing. The housing has a receiving cavity and an opening on one side, and the plurality of capacitor cores are disposed in the receiving cavity. A limiting cover is fixedly connected to the opening side of the housing, and the limiting cover has a plurality of limiting holes to allow the lead terminals of the plurality of capacitor cores to extend from the same side of the housing.

[0007] In a preferred embodiment of this invention, the capacitor core is a columnar body, and a welding layer is provided on both end faces of the capacitor core; the capacitor core is horizontally disposed inside the outer casing, and the lead-out terminals are led out from the welding layer.

[0008] In a preferred embodiment of this invention, the limiting holes on the limiting cover are arranged in several columns, one column being located near the side of the limiting cover, and the remaining columns being arranged in parallel on the surface of the limiting cover.

[0009] In a preferred embodiment of this utility model, a plurality of fixing holes are provided between the two sides of the limiting cover, and a buckle is provided on the inner wall of the fixing hole. A limiting protrusion is provided on the inner side wall of the corresponding outer shell. The limiting protrusion is inserted into the buckle to fix the relative position between the lead-out terminal and the outer shell.

[0010] In a preferred embodiment of this invention, the buckle includes a limiting groove that is adapted to the limiting protrusion; inclined portions are provided on both sides of the limiting groove, and the inclined portions are inclined to guide the limiting protrusion to insert into the limiting groove along the inclined portions during the alignment of the limiting groove and the limiting protrusion.

[0011] In a preferred embodiment of this invention, a connecting portion is provided between the inclined portion and the limiting groove, and the distance between the connecting portions on both sides of the limiting groove is greater than the cross-sectional dimension of the limiting groove.

[0012] In a preferred embodiment of this utility model, the two side walls of the limiting groove are respectively provided with inner grooves, and the two inner grooves are arranged facing each other. The inner grooves are used to expand the space of the limiting groove so that the limiting protrusion can be inserted into the limiting groove.

[0013] In a preferred embodiment of this invention, the limiting cover has limiting openings at both ends, the limiting openings facing the side wall of the outer shell, and the limiting openings are used to align the limiting cover with the outer shell.

[0014] In a preferred embodiment of this invention, a plurality of partitions are spaced apart inside the outer casing, and the two ends of the partitions abut against the inner sidewall of the outer casing. The plurality of partitions, the outer casing, and the limiting cover together form a plurality of sealed cavities for the capacitor core to be inserted.

[0015] In a preferred embodiment of this invention, the cavity formed between the outer shell and the limiting cover is filled with potting compound, which encapsulates multiple capacitor cores; a lead hole and a guide hole are provided through the potting compound, the lead hole being aligned with the limiting hole, and the guide hole being aligned with the fixing hole.

[0016] In a preferred embodiment of this invention, a limiting part is connected to the side of the lead hole away from the guide hole, and the limiting part is used to fix the lead terminal.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention provides a thin-film capacitor assembly, including multiple capacitor cores and a housing. The housing has a receiving cavity and an opening on one side, and the multiple capacitor cores are disposed within the receiving cavity. A limiting cover is fixedly connected to the opening side of the housing, and the limiting cover has several limiting holes to allow the leads of the multiple capacitor cores to extend from the same side of the housing. This invention integrates multiple capacitor cores within the receiving cavity, fixes the limiting cover to the opening side of the housing, and allows the leads of the multiple capacitor cores to extend towards the limiting cover and pass through the limiting holes of the limiting cover. Because the relative position between the housing and the limiting cover is fixed, the relative position between the leads of the multiple capacitor cores and the housing is also fixed. By using the limiting cover to limit the leads of multiple capacitor cores simultaneously extending from the same side of the housing (i.e., achieving the multi-pin function of a single capacitor core), the limiting cover eliminates the need for additional limiting clamps, thereby reducing the production cost of the thin-film capacitor assembly. Attached Figure Description

[0019] Figure 1 This is an exploded view of the thin-film capacitor assembly of this utility model;

[0020] Figure 2 This is a front view of the thin-film capacitor assembly of this utility model;

[0021] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0022] Figure 4 This is a schematic diagram of the capacitor core of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the thin-film capacitor assembly of this utility model;

[0024] Figure 6 This is a schematic diagram of the limiting cover of this utility model;

[0025] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 This is a schematic diagram of the potting compound of this utility model;

[0027] Figure 9 yes Figure 8 A magnified view of point C in the middle.

[0028] Reference numerals: 1. Outer shell; 2. Capacitor core; 3. Solder layer; 4. Lead-out terminal; 5. Limiting cover; 6. Fixing hole; 7. Buckle; 8. Limiting protrusion; 9. Limiting groove; 10. Inclined part; 11. Inner groove; 12. Limiting hole; 13. Limiting opening; 14. Partition; 15. Encapsulating glue; 16. Lead hole; 17. Guide hole; 18. Receiving cavity; 19. Connecting part; 20. Limiting part. Detailed Implementation

[0029] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0030] Example 1

[0031] like Figures 1-9 As shown, this embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity and an opening on one side, and the multiple capacitor cores 2 are disposed in the receiving cavity. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has a plurality of limiting holes 12 so that the lead terminals 4 of the multiple capacitor cores 2 can extend from the same side of the housing 1.

[0032] The outer casing 1 contains multiple receiving cavities 18, and each receiving cavity 18 contains N capacitor cores 2, where N ≥ 1 and N is a positive integer. This embodiment takes three receiving cavities 18 as an example, with two capacitor cores 2 in each receiving cavity 18, for a total of six capacitor cores 2.

[0033] First, place the six capacitor cores 2 into the three receiving cavities 18 respectively. Align the limiting cover 5 with the opening side of the top of the outer shell 1. Then fix the limiting cover 5 to the opening side of the outer shell 1 to prevent relative movement between the limiting cover 5 and the outer shell 1.

[0034] With the relative position between the limiting cover 5 and the outer shell 1 fixed, the lead terminals 4 on the two end faces of the capacitor core 2 pass through the limiting cover 5, and the relative position between the lead terminals 4 and the outer shell 1 is fixed, thereby reducing the cumulative tolerance caused by the positional offset between the outer shell 1 and the lead terminals 4.

[0035] The capacitor core 2 is made of stretchable plastic film such as PP, PET or PPS through a series of capacitor production processes. Preferably, the capacitor core 2 is cylindrical in shape. Metal material is attached to the two end faces of the capacitor core 2 by spraying. Multiple lead terminals 4 are welded to the two end faces of the capacitor core 2 by special welding methods such as resistance welding or tin soldering.

[0036] Multiple capacitor cores 2 have leads 4 extending towards the limiting cover 5, i.e., from bottom to top, and then the leads 4 pass through several limiting holes 12 of the limiting cover 5. The leads 4 of multiple capacitor cores 2 extend from the same side of the housing 1, thereby realizing the multi-pin function of a single capacitor core 2.

[0037] Existing technology uses a cover plate to encapsulate the capacitor core 2, meaning the cover plate is the existing structure of film capacitor assemblies. This invention utilizes the existing structure by creating several limiting holes 12 on the limiting cover 5, enabling the limiting cover 5 to limit the position of the lead-out terminals 4. This invention fixes the relative position between the lead-out terminals 4 and the outer casing 1 without requiring additional limiting clamps, thereby reducing the production cost of the film capacitor assembly.

[0038] This embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity and an opening on one side, and the multiple capacitor cores 2 are disposed within the receiving cavity. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has several limiting holes 12 to allow the lead-out terminals 4 of the multiple capacitor cores 2 to extend from the same side of the housing 1. This invention integrates multiple capacitor cores 2 within the receiving cavity, fixes the limiting cover 5 to the opening side of the housing 1, and allows the lead-out terminals 4 of the multiple capacitor cores 2 to extend towards the limiting cover 5 and pass through the several limiting holes 12 of the limiting cover 5. Since the relative positions between the housing 1 and the limiting cover 5 are fixed, the relative positions between the lead-out terminals 4 of the multiple capacitor cores 2 and the housing 1 are also fixed. By using the limiting cover 5 to limit the lead-out terminals 4 while allowing multiple capacitor cores 2 to simultaneously extend from the same side of the housing 1 (i.e., achieving the multi-pin function of a single capacitor core 2), the limiting cover 5 eliminates the need for additional limiting clamps, thereby reducing the production cost of the thin-film capacitor assembly.

[0039] Example 2

[0040] like Figures 1-9 As shown, this embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity and an opening on one side, and the multiple capacitor cores 2 are disposed in the receiving cavity. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has a plurality of limiting holes 12 so that the lead terminals 4 of the multiple capacitor cores 2 can extend from the same side of the housing 1.

[0041] The capacitor core 2 is a columnar body, and the two end faces of the capacitor core 2 are provided with welding layers 3; the capacitor core 2 is horizontally disposed inside the outer shell 1, and the lead-out terminals 4 are led out from the welding layers 3.

[0042] The limiting holes 12 on the limiting cover 5 are arranged in several columns, one column is located near the side of the limiting cover 5, and the remaining columns are arranged in parallel on the surface of the limiting cover 5.

[0043] The two end faces of the cylindrical capacitor core 2 face the inner wall of the outer casing 1. The cylindrical capacitor core 2 is small in size and occupies little space, allowing the outer casing 1 to accommodate multiple cylindrical capacitor cores 2. The cylindrical capacitor core 2 has good stability and is not easily deformed. The cylindrical capacitor core 2 has a larger surface area, resulting in better heat dissipation.

[0044] The capacitor core 2 is horizontally arranged, meaning that the end faces of both sides of the capacitor core 2 face the inner wall of the outer casing 1, the bottom of the capacitor core 2 abuts against the bottom surface of the outer casing 1, and the limiting cover is located above the capacitor core 2. This horizontal arrangement increases the contact area between the capacitor core 2 and the outer casing 1, reduces the height of the capacitor core 2, and thus reduces the height of the outer casing 1, thereby lowering production costs.

[0045] Each receiving cavity 18 contains N capacitor cores 2, where N ≥ 1 and N is a positive integer. If each receiving cavity 18 contains one capacitor core 2, then the limiting cover 5 has two rows of limiting holes 12, one row of limiting holes 12 located in the middle of the limiting cover 5 and the other row of limiting holes 12 located on the side of the limiting cover 5, or one row of limiting holes 12 located on the first side of the limiting cover 5 and the other row of limiting holes 12 located on the second side of the limiting cover 5, wherein the first side and the second side are arranged facing each other. If each receiving cavity 18 contains two capacitor cores 2, then two rows of limiting holes 12 are opened in the middle of the limiting cover 5, and one row of limiting holes 12 is opened on each of the two opposing sides of the limiting cover 5. The weld layer 3 of the capacitor core 2 away from the inner wall of the outer shell 1 is led out from the row of limiting holes 12 in the middle of the limiting cover 5, and the weld layer 3 of the capacitor core 2 close to the inner wall of the outer shell 1 is led out from the row of limiting holes 12 on the side of the limiting cover 5. If each receiving cavity 18 contains N capacitor cores 2, where N is a positive integer greater than or equal to 3, then one row of limiting holes 12 is opened on each of the two sides of the limiting cover 5, and (N-2)*2+2 rows of limiting holes 12 are evenly opened in the area between the two sides of the limiting cover 5.

[0046] In this embodiment, the capacitor core 2 is a columnar body, and welding layers 3 are provided on both end faces of the capacitor core 2. The capacitor core 2 is horizontally disposed inside the outer casing 1, and the lead-out terminals 4 are led out from the welding layers 3. The columnar capacitor core 2 has good stability and is not easily deformed. The columnar capacitor core 2 has a larger surface area and better heat dissipation. The limiting holes 12 on the limiting cover 5 are arranged in several rows, one row is located close to the side of the limiting cover 5, and the remaining rows are arranged in parallel on the surface of the limiting cover 5. By adopting a horizontal arrangement, the contact area between the capacitor core 2 and the outer casing 1 can be increased, and the height of the capacitor core 2 can be reduced, thereby reducing the height of the outer casing 1 and reducing production costs.

[0047] Example 3

[0048] like Figures 1-9 As shown, this embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity and an opening on one side, and the multiple capacitor cores 2 are disposed in the receiving cavity. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has a plurality of limiting holes 12 so that the lead terminals 4 of the multiple capacitor cores 2 can extend from the same side of the housing 1.

[0049] The limiting cover 5 has several fixing holes 6 between its two sides. The inner wall of the fixing hole 6 is provided with a buckle 7. The inner wall of the corresponding outer shell 1 is provided with a limiting protrusion 8. The limiting protrusion 8 is inserted into the buckle 7 to fix the relative position between the lead-out terminal 4 and the outer shell 1.

[0050] The buckle 7 includes a limiting groove 9, which is adapted to the limiting protrusion 8; the limiting groove 9 is provided with inclined portions 10 on both sides, which are inclined to guide the limiting protrusion 8 to insert into the limiting groove 9 along the inclined portion 10 during the process of aligning the limiting groove 9 and the limiting protrusion 8.

[0051] The limiting protrusion 8 has a rectangular cross-sectional shape and is adapted to the limiting groove 9. The length of the limiting protrusion 8 on the inner side wall of the outer shell 1 is greater than the length of the limiting groove 9, and the upper part of the limiting protrusion 8 is inserted into the limiting groove 9.

[0052] The cross-sectional size of the inclined portion 10 gradually decreases from the end away from the outer shell 1 to the end closer to the outer shell 1. That is, the cross-sectional size of the inclined portion 10 is the largest at the end away from the outer shell 1 and the smallest at the end closer to the outer shell 1.

[0053] The limiting groove 9 is located between two adjacent inclined parts 10. The inclined parts 10 are used to position the limiting groove 9. First, the limiting cover 5 is moved according to the position of the inclined parts 10 so that the limiting protrusion 8 is initially aligned with the limiting groove 9. Then, under the guidance of the inclined parts 10, the position of the limiting cover 5 is adjusted so that the limiting protrusion 8 is inserted into the limiting groove 9.

[0054] A connecting part 19 is provided between the inclined part 10 and the limiting groove 9, and the distance between the connecting parts 19 on both sides of the limiting groove 9 is greater than the cross-sectional dimension of the limiting groove 9.

[0055] The inclined portions 10 on both sides of the same limiting groove 9 form two connecting portions 19 with the limiting groove 9. The connecting portions 19 can adopt an arc-shaped transition surface to achieve a smooth transition, or a straight transition surface to reduce processing costs. The distance between the two connecting portions 19 corresponding to the same limiting groove 9 is greater than the cross-sectional dimension of the limiting groove 9, that is, the width at the entrance of the limiting groove 9 is greater than the cross-sectional dimension inside the limiting groove 9, so that the limiting protrusion 8 on the inner sidewall of the outer shell 1 can quickly snap into the limiting groove 9, improving the assembly efficiency of the limiting cover 5 and the outer shell 1.

[0056] The two side walls of the limiting groove 9 are respectively provided with inner grooves 11, and the two inner grooves 11 are arranged facing each other. The inner grooves 11 are used to expand the space of the limiting groove 9 so that the limiting protrusion 8 can be inserted into the limiting groove 9.

[0057] The two inner grooves 11 are arranged facing each other, which can provide more space for the limiting protrusion 8 inserted into the limiting groove 9, and prevent the limiting groove 9 from clamping the limiting protrusion 8 too tightly, which would damage the limiting protrusion 8. The inner groove 11 is an annular groove that is recessed away from the limiting groove 9. The side of the inner groove 11 is semi-circular. The inner groove 11 can also be a rectangular groove, which is not limited here.

[0058] This embodiment simultaneously provides an inclined portion 10, a connecting portion 19, and an inner groove 11. During the assembly of the limiting cover 5 and the outer shell 1, the inclined portion 10 is used to align the limiting protrusion 8 on the inner sidewall of the outer shell 1 with the limiting groove 9. The limiting protrusion 8 slides along the inclined portion 10, passes through the connecting portion 19, and inserts into the limiting groove 9. The limiting protrusion 8 is pushed inward into the limiting groove 9, and the limiting protrusion 8 passes through the inner groove 11 until the limiting protrusion 8 abuts against the inner wall of the top of the limiting groove 9, thus completing the assembly of the limiting cover 5 and the outer shell 1.

[0059] The buckle 7 in this embodiment includes a limiting groove 9, which is adapted to the limiting protrusion 8. Inclined portions 10 are provided on both sides of the limiting groove 9. These inclined portions 10 are inclined to guide the limiting protrusion 8 into the limiting groove 9 along the inclined portions 10 during alignment. A connecting portion 19 is provided between the inclined portion 10 and the limiting groove 9, and the distance between the connecting portions 19 on both sides of the limiting groove 9 is greater than the cross-sectional dimension of the limiting groove 9. Two inner grooves 11 are respectively formed on the two side walls of the limiting groove 9, and the two inner grooves 11 are arranged facing each other. The inner grooves 11 are used to expand the space of the limiting groove 9 to facilitate the insertion of the limiting protrusion 8 into the limiting groove 9. The inclined part 10 serves to guide the limiting protrusion 8, and the connecting part 19 serves as a transition, so that the limiting protrusion 8 is initially inserted into the limiting groove 9, the limiting protrusion 8 is pushed inward into the limiting groove 9, the limiting protrusion 8 passes through the inner groove 11 until the limiting protrusion 8 abuts against the inner wall of the top of the limiting groove 9, and the assembly of the limiting cover 5 and the outer shell 1 is completed.

[0060] Example 4

[0061] like Figures 1-9 As shown, this embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity 18 and an opening on one side, and the multiple capacitor cores 2 are disposed in the receiving cavity 18. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has a plurality of limiting holes 12 so that the lead terminals 4 of the multiple capacitor cores 2 can extend from the same side of the housing 1.

[0062] The limiting cover 5 has several fixing holes 6 between its two sides. The inner wall of the fixing hole 6 is provided with a buckle 7. The inner wall of the corresponding outer shell 1 is provided with a limiting protrusion 8. The limiting protrusion 8 is inserted into the buckle 7 to fix the relative position between the lead-out terminal 4 and the outer shell 1.

[0063] The limiting cover 5 has limiting openings 13 at both ends, the limiting openings 13 facing the side wall of the outer shell 1, and the limiting openings 13 are used to align the limiting cover 5 with the outer shell 1.

[0064] The side where the limiting opening 13 is located is perpendicular to the side of the limiting cover 5. Multiple limiting holes 12 are distributed along the length direction of the limiting cover 5, and multiple limiting openings 13 are distributed along the width direction of the limiting cover 5. The cross-sectional shape of the limiting opening 13 is semi-circular. The limiting opening 13 is used to further fix the limiting cover 5 to the outer shell 1, thereby limiting the lead-out terminal 4.

[0065] Preferably, an annular structure is provided on the inner sidewall of the outer casing 1, and the annular structure and the limiting protrusion 8 are distributed on different sidewalls of the outer casing 1. The annular structure faces the limiting opening 13. When the annular structure is inserted into the limiting opening 13, it cooperates with the limiting protrusion 8 to install the limiting cover 5 on the top of the outer casing 1. Under the combined action of the limiting protrusion 8 and the limiting groove 9, and the annular structure and the limiting opening 13, the limiting cover 5 can be firmly connected to the top of the outer casing 1, so that the relative position of the limiting cover 5 and the outer casing 1 is fixed, thereby fixing the relative position between the lead-out terminal 4 and the outer casing 1.

[0066] In this embodiment, the limiting cover 5 has limiting openings 13 at both ends, which face the sidewall of the outer shell 1. The limiting openings 13 are used to align the limiting cover 5 with the outer shell 1. The side containing the limiting opening 13 is perpendicular to the side edge of the limiting cover 5, and the cross-sectional shape of the limiting opening 13 is semi-circular. The limiting openings 13 further fix the limiting cover 5 to the outer shell 1, thereby limiting the position of the lead-out terminal 4.

[0067] Example 5

[0068] like Figures 1-9 As shown, this embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity 18 and an opening on one side, and the multiple capacitor cores 2 are disposed in the receiving cavity 18. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has a plurality of limiting holes 12 so that the lead terminals 4 of the multiple capacitor cores 2 can extend from the same side of the housing 1.

[0069] Multiple partitions 14 are spaced apart inside the outer casing 1. The two ends of the partitions 14 abut against the inner sidewall of the outer casing 1. The multiple partitions 14, the outer casing 1, and the limiting cover 5 enclose and form multiple sealed cavities for the capacitor core 2 to be installed.

[0070] The partition 14 extends along the width direction of the outer shell 1, and multiple partitions 14 are parallel to each other. The length of the partition 14 is equal to the width of the outer shell 1. In this embodiment, two partitions 14 are spaced apart inside the outer shell 1. The two partitions 14, together with the inner sidewalls on both sides of the outer shell 1 and the limiting cover 5, form three sealed cavities. N capacitor cores 2 are placed in each sealed cavity, for a total of 3N capacitor cores 2, where N≥1 and N is a positive integer. If N is a positive integer greater than or equal to 2, then there is a gap between adjacent capacitor cores 2 in each sealed cavity.

[0071] By using a partition 14 to isolate adjacent capacitor cores 2, interference between different capacitor cores 2 can be prevented, ensuring that multiple capacitor cores 2 can work independently. The size of the sealed cavity is slightly larger than the size of the capacitor core 2. By using the partition 14 to divide the interior of the outer shell 1 into multiple sealed cavities, the internal space of the outer shell 1 can be fully utilized, allowing the outer shell 1 to accommodate more capacitor cores 2.

[0072] In this embodiment, the outer casing 1 is provided with multiple partitions 14 at intervals. The two ends of each partition 14 abut against the inner sidewall of the outer casing 1. The multiple partitions 14, the outer casing 1, and the limiting cover 5 enclose and form multiple sealed cavities for the capacitor cores 2 to be installed. By using partitions 14 to divide the interior of the outer casing 1 into multiple sealed cavities, the internal space of the outer casing 1 can be fully utilized, and interference between different capacitor cores 2 can be prevented.

[0073] Example 6

[0074] For example, 1- Figure 9 As shown, this embodiment provides a thin-film capacitor assembly, including multiple capacitor cores 2 and a housing 1. The housing 1 has a receiving cavity 18 and an opening on one side, and the multiple capacitor cores 2 are disposed in the receiving cavity 18. A limiting cover 5 is fixedly connected to the opening side of the housing 1, and the limiting cover 5 has a plurality of limiting holes 12 so that the lead terminals 4 of the multiple capacitor cores 2 can extend from the same side of the housing 1.

[0075] The limiting cover 5 has several fixing holes 6 between its two sides. The inner wall of the fixing hole 6 is provided with a buckle 7. The inner wall of the corresponding outer shell 1 is provided with a limiting protrusion 8. The limiting protrusion 8 is inserted into the buckle 7 to fix the relative position between the lead-out terminal 4 and the outer shell 1.

[0076] The cavity 18 formed between the outer shell 1 and the limiting cover 5 is filled with potting compound 15, which encapsulates multiple capacitor cores 2. A lead hole 16 and a guide hole 17 are provided through the potting compound 15. The lead hole 16 is aligned with the limiting hole 12, and the guide hole 17 is aligned with the fixing hole 6.

[0077] A potting compound 15 is filled between the plurality of capacitor cores 2 and the outer casing 1, and the potting compound 15 is filled between the plurality of capacitor cores 2 and the limiting cover 5.

[0078] The potting compound 15 has a through-hole 16 and a guide hole 17. The lead hole 16 is aligned with the limiting hole 12, and the guide hole 17 is aligned with the fixing hole 6. The limiting protrusion 8 passes through the guide hole 17 and is inserted into the limiting groove 9 of the fixing hole 6.

[0079] The lead terminal 4 is soldered to the solder layer 3 on the end face of the capacitor core 2. Then, the limiting cover 5 is installed on the opening side of the top of the outer shell 1 to fix the relative position between the capacitor core 2 and the outer shell 1. Encapsulating glue 15 is filled between the outer shell 1 and the capacitor core 2, and between the capacitor core 2 and the limiting cover 5, thereby encapsulating the capacitor core 2 inside the outer shell 1 and completing the fabrication process of the multi-pin film capacitor.

[0080] In this embodiment, the limiting cover 5 is made of plastic, and the potting compound 15 is used as the filler for the thin film capacitor assembly. The main components of the potting compound 15 are epoxy resin and polyurethane.

[0081] The number of lead holes 16 in the potting compound 15 is the same as the number of limiting holes 12 in the limiting cap 5, and the lead holes 16 correspond one-to-one with the limiting holes 12. The number of guide holes 17 in the potting compound 15 is the same as the number of fixing holes 6 in the limiting cap 5, and the guide holes 17 correspond one-to-one with the fixing holes 6. The lead holes 16 are used for the lead-out terminals 4 to pass through, and the guide holes 17 are used for the limiting protrusions 8 to pass through.

[0082] The lead hole 16 is connected to a limiting part 20 on the side away from the guide hole 17, and the limiting part 20 is used to fix the lead terminal 4.

[0083] The area between the limiting part 20 and the lead hole 16 is for the lead terminal 4 to pass through. The limiting part 20 may be a baffle or a bending structure to fix the lead terminal 4 in the lead hole 16 when it passes through the lead hole 16, so as to prevent the lead terminal 4 from coming off the lead hole 16.

[0084] In this embodiment, the receiving cavity 18 formed between the outer shell 1 and the limiting cover 5 is filled with potting compound 15, which encapsulates multiple capacitor cores 2. A lead hole 16 and a guide hole 17 are provided through the potting compound 15. The lead hole 16 is aligned with the limiting hole 12, and the guide hole 17 is aligned with the fixing hole 6. The limiting protrusion 8 passes through the guide hole 17 and is inserted into the limiting groove 9 of the fixing hole 6. The potting compound 15 allows the lead-out terminals 4 and the limiting protrusion 8 to pass through while simultaneously improving the mechanical strength, moisture and dust resistance, and electrical performance of the thin-film capacitor assembly.

[0085] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0086] It should be understood that spatial relative terms are intended to encompass different orientations of a device in use or operation, in addition to the orientation described in the figures. For example, if a device in the figures is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0088] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thin-film capacitor assembly, characterized in that, It includes multiple capacitor cores and a housing. The housing has a receiving cavity and an opening on one side. The multiple capacitor cores are disposed in the receiving cavity. A limiting cover is fixedly connected to the opening side of the housing. The limiting cover has several limiting holes so that the lead terminals of the multiple capacitor cores can extend out from the same side of the housing.

2. The thin-film capacitor assembly according to claim 1, characterized in that, The capacitor core is a columnar body, and a welding layer is provided on both end faces of the capacitor core; the capacitor core is horizontally disposed inside the housing, and the lead-out terminals are led out from the welding layer.

3. The thin-film capacitor assembly according to claim 1, characterized in that, The limiting holes on the limiting cover are arranged in several columns, one column is located near the side of the limiting cover, and the remaining columns are arranged in parallel on the surface of the limiting cover.

4. The thin-film capacitor assembly according to claim 1, characterized in that, The limiting cover has several fixing holes between its two sides. The inner wall of each fixing hole is provided with a buckle. The inner wall of the corresponding outer shell is provided with a limiting protrusion. The limiting protrusion is inserted into the buckle to fix the relative position between the lead-out terminal and the outer shell.

5. The thin-film capacitor assembly according to claim 4, characterized in that, The buckle includes a limiting groove that is adapted to the limiting protrusion; the limiting groove has inclined portions on both sides, which are inclined to guide the limiting protrusion to insert into the limiting groove along the inclined portions during the alignment of the limiting groove and the limiting protrusion.

6. The thin-film capacitor assembly according to claim 5, characterized in that, A connecting part is provided between the inclined part and the limiting groove, and the distance between the connecting parts on both sides of the limiting groove is greater than the cross-sectional dimension of the limiting groove.

7. The thin-film capacitor assembly according to claim 5, characterized in that, The two side walls of the limiting groove are respectively provided with inner grooves, and the two inner grooves are arranged facing each other. The inner grooves are used to expand the space of the limiting groove so that the limiting protrusion can be inserted into the limiting groove.

8. The thin-film capacitor assembly according to claim 1, characterized in that, The limiting cover has limiting openings at both ends, the limiting openings facing the side wall of the outer shell, and the limiting openings are used to align the limiting cover with the outer shell.

9. The thin-film capacitor assembly according to claim 1, characterized in that, Multiple partitions are spaced apart inside the housing. The two ends of the partitions abut against the inner sidewall of the housing. The multiple partitions, the housing, and the limiting cover together form multiple sealed cavities for the capacitor core to be installed.

10. The thin-film capacitor assembly according to claim 4, characterized in that, The cavity formed between the outer shell and the limiting cover is filled with potting compound, which encapsulates multiple capacitor cores. A lead hole and a guide hole are provided through the potting compound, with the lead hole aligned with the limiting hole and the guide hole aligned with the fixing hole.

11. The thin-film capacitor assembly according to claim 10, characterized in that, A limiting part is connected to the side of the lead hole away from the guide hole, and the limiting part is used to fix the lead terminal.

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