Integrated capacitor

Abstract

The utility model relates to an integrated capacitor, including the multiple capacitor core group of parallel connection, each capacitor core group includes the multiple capacitor core (1) of mutual series connection, and each capacitor core group is connected with first electrode (2) through first connecting piece (3) respectively, and the length of first connecting piece of each capacitor core group is same. The utility model can solve the problem that the performance degradation quantity between each capacitor is inconsistent when the voltage and current difference between each capacitor causes when multiple capacitors are connected in series and parallel, to satisfy the performance consistency of each capacitor in the whole life cycle of high-precision circuit, make the service life of circuit reach design requirement.

Description

Technical Field

[0001] This utility model belongs to the field of electronic components, specifically, it relates to an integrated capacitor. Background Technology

[0002] Capacitors are an indispensable part of electronic circuits, playing functions such as energy storage, filtering, coupling, and decoupling. As electronic and electrical equipment develops towards miniaturization, lightweighting, multifunctionality, and high performance, the use of capacitors in electronic circuits is increasing daily.

[0003] Existing technologies often employ independent capacitor components, frequently requiring multiple independent capacitors to be connected in series or parallel in circuit designs. When multiple independent capacitors are connected in series or parallel, limitations on pin spacing and mounting location lead to wasted PCB space and significantly inconvenient installation, increasing installation time. Furthermore, multiple independent capacitors connected in series or parallel generate additional parasitic inductance and resistance. Impedance differences between capacitors cause significant phase differences in current discharge, and voltage and current differences between different capacitors result in inconsistent performance degradation, preventing the circuit from meeting design lifespan requirements. Additionally, external soldering of multiple independent capacitor components further increases the probability of failure; reliability statistics show that for each additional solder joint, the system failure probability increases by approximately 0.5-1%. Utility Model Content

[0004] The purpose of this invention is to provide an integrated capacitor with a long service life and high reliability.

[0005] To achieve the above objectives, this utility model provides an integrated capacitor, comprising multiple capacitor core groups connected in parallel, each capacitor core group comprising multiple capacitor cores connected in series, each capacitor core group being connected to a first lead electrode via a first connecting piece, and the length of the first connecting piece of each capacitor core group being the same.

[0006] Preferably, each capacitor core group includes two capacitor cores arranged side by side, with one end of the two capacitor cores connected by a second connecting piece, and the other end provided with a positive terminal and a negative terminal, forming a U-shaped series structure.

[0007] Preferably, the second connecting piece is oblong, with terminal holes at both ends for accommodating the terminals of the capacitor core, and multiple welding strips extending radially outward on the outer periphery of both ends.

[0008] Preferably, the terminals of the capacitor core are formed by gold sputtering or tin dipping, and the material of the terminals is tin-zinc, zinc, babbitt alloy, aluminum, tin, or zinc-aluminum alloy.

[0009] Preferably, the first lead electrode is cylindrical, with a plurality of connecting portions distributed circumferentially and extending outward at one end; a plurality of capacitor core groups surround the first lead electrode, and one terminal of each capacitor core group is connected to a connecting portion through the first connecting piece; and / or

[0010] The other end of the first lead electrode is provided with a plurality of plug-in portions (2-2) distributed circumferentially and extending outward, the plug-in portions being used to plug into the PCB board.

[0011] Preferably, the first connecting piece includes a sleeve ring and a connecting piece connected to the sleeve ring radially along the sleeve ring, the length of the first connecting piece being the length from the center of the sleeve ring to the edge of the connecting piece; the outer periphery of the sleeve ring is also provided with a plurality of welding pieces distributed circumferentially.

[0012] Preferably, each capacitor core assembly further includes a second lead electrode, the second lead electrode including a U-shaped electrode lead plate, the edge of the electrode lead plate being provided with a buckle perpendicularly.

[0013] Preferably, it further includes a housing and a cover plate, the cover plate covering the housing, the cover plate having a first reserved hole and a plurality of second reserved holes, the first reserved hole for accommodating a first lead electrode, the second reserved holes for accommodating a second lead electrode, and the buckle being snapped onto the cover plate;

[0014] The cover plate is also provided with a filling hole for filling the housing with insulating material.

[0015] Preferably, an insulating plate is provided between adjacent capacitor cores.

[0016] Preferably, the capacitor core is formed by winding a dielectric film and an electrode material layer around a core tube. The dielectric film is made of polypropylene (PP), polyethylene terephthalate (PET), polyimide (PI), polyetheretherketone (PEEK), polyethylene naphthalate (PEN), polystyrene (PS), capacitor paper, or mica paper. The core tube is made of polybutylene terephthalate (PBT), PET, polycarbonate (PC), or polyamide (PA).

[0017] The beneficial effect of this invention is that it can solve the problem of inconsistent performance degradation among capacitors caused by voltage and current differences when multiple capacitors are connected in series and parallel, thus ensuring the performance consistency of each capacitor throughout the entire life cycle of a high-precision circuit and enabling the circuit to meet design requirements. Furthermore, this invention can reduce external solder joints, improve the moisture resistance and vibration resistance of capacitors, and enhance the reliability of capacitor applications.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0020] Figure 1 A schematic diagram of the internal structure of an integrated capacitor according to an embodiment of the present invention is shown.

[0021] Figure 2 A top view of the internal structure of an integrated capacitor according to an embodiment of the present invention is shown.

[0022] Figure 3 A schematic diagram of the cover plate structure of an integrated capacitor according to an embodiment of the present invention is shown.

[0023] Figure 4 A schematic diagram of the integrated capacitor according to an embodiment of the present invention is shown after assembly.

[0024] Figure 5 A schematic diagram of the structure of the first lead electrode according to an embodiment of the present invention is shown.

[0025] Figure 6 A schematic diagram of the structure of the first connecting piece according to an embodiment of the present invention is shown.

[0026] Figure 7 A schematic diagram of the structure of a capacitor core assembly according to an embodiment of the present invention is shown.

[0027] Figure 8 A schematic diagram of the structure of the second lead electrode according to an embodiment of the present invention is shown.

[0028] Figure 9 An electrical connection diagram of an integrated solid high-voltage capacitor according to an embodiment of the present invention is shown.

[0029] Explanation of reference numerals in the attached figures

[0030] 1. Capacitor core; 2. First lead electrode; 2-1. Connecting part; 2-2. Insertion part; 3. First connecting piece; 3-1. Sleeve ring; 3-2. Connecting piece; 3-3. Welding piece; 4. Second connecting piece; 4-1. Terminal hole; 4-2. Welding strip; 5. Second lead electrode; 5-1. Electrode lead plate; 5-2. Snap-on; 6. Housing; 7. Cover plate; 7-1. First reserved hole; 7-2. Second reserved hole; 7-3. Filling hole; 8. Insulating plate. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0032] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0033] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the orientation shown in the accompanying drawings. "Inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself.

[0034] The dimensions and proportions of the components shown in the accompanying drawings are illustrative and do not limit or restrict the content of this utility model.

[0035] The following is a reference appendix Figures 1 to 8 This invention describes an integrated capacitor according to an embodiment of the present invention. As shown in the figure, the integrated capacitor comprises multiple capacitor core groups connected in parallel. Each capacitor core group includes multiple capacitor cores 1 connected in series. Each capacitor core group is connected to a first lead electrode 2 via a first connecting piece 3, and the length of the first connecting piece of each capacitor core group is the same.

[0036] This integrated capacitor design connects to the lead-out electrodes via connecting tabs, reducing the number of solder joints for individual capacitor components and improving overall reliability. The first connecting tab between each capacitor core and the lead-out electrode is of the same length, ensuring consistent current flow distance and electrical performance parameters among the capacitor cores. The equivalent series inductance (ESL) and equivalent series resistance (ESR) are also highly consistent, thus guaranteeing good performance consistency across different capacitor cores throughout the circuit's entire lifespan.

[0037] In this embodiment, the integrated capacitor includes five capacitor core groups; in actual implementation, the number of capacitor core groups can be selected according to actual needs. Each capacitor core group includes two capacitor cores 1 arranged side by side, one end of the two capacitor cores 1 is connected by a second connecting piece 4, and the other end is provided with a positive terminal and a negative terminal, forming a U-shaped series structure.

[0038] The second connecting piece 4 is oblong, with terminal holes 4-1 at both ends for accommodating the positive and negative terminals of the capacitor core, respectively. Multiple radially extending welding strips 4-2 are provided on the outer periphery of both ends. By providing multiple welding strips 4-2, the welding connection area between the second connecting piece and the electrode terminals can be increased, thereby improving the welding bond strength.

[0039] The positive and negative terminals of the capacitor core can be formed by gold spraying or tin dipping, and the terminal materials can be tin-zinc, zinc, Babbitt alloy, aluminum, tin or zinc-aluminum alloy, etc.

[0040] like Figure 5 As shown, in this embodiment, the first lead electrode 2 is cylindrical, specifically a circular cylinder. One end of the first lead electrode 2 has multiple connecting portions 2-1 distributed circumferentially and extending outward. Multiple capacitor core groups are arranged around the first lead electrode 2, and one terminal of each capacitor core group is connected to a connecting portion 2-1 via a first connecting piece 3. During assembly, each connecting portion 2-1 can be folded 90 degrees outward to facilitate connection with the first connecting piece 3. The other end of the first lead electrode 2 has multiple insertion portions 2-2 distributed circumferentially and extending outward, which are used for insertion into the PCB board. The height of the first lead electrode 2 can be approximately equal to the height of the capacitor core 1 to facilitate connection.

[0041] The first connecting piece 3 includes a sleeve ring 3-1 and a connecting piece 3-2 radially connected to the sleeve ring 3-1. The length of the first connecting piece refers to the length L from the center of the sleeve ring to the edge of the connecting piece 3-2. The outer periphery of the sleeve ring 3-1 is also provided with multiple welding pieces 3-3 distributed circumferentially. The identical connecting piece length L ensures consistent current flow distance and electrical performance parameters between different capacitor core groups, thereby ensuring good performance consistency between different capacitor core groups throughout the circuit's lifespan. By providing multiple welding pieces, the welding connection area between the first connecting piece and the electrode terminals can be increased, improving the welding bonding strength.

[0042] Each capacitor core also includes a second lead electrode 5. For example... Figure 8 As shown, the second lead electrode 5 includes a U-shaped electrode lead plate 5-1, with a buckle 5-2 perpendicularly provided on the edge of the electrode lead plate 5-1. In this embodiment, the buckle 5-2 is bent at a right angle, which allows it to be engaged with the cover plate 7 and facilitates soldering to the PCB board. The two protrusions of the U-shaped electrode lead plate 5-1 are respectively provided with grooves. By providing grooves, the protrusions are forked, which helps to increase the soldering bond strength when the second lead electrode is soldered to the terminal.

[0043] In this embodiment, the integrated capacitor also includes a housing 6 and a cover plate 7. The housing 6 is used to accommodate the capacitor core assembly, and the cover plate 7 is placed on the housing 6. A sealing ring can be provided between the housing and the cover plate. The bottom plate of the housing 7 has multiple positioning posts for mounting each capacitor core assembly. Bosses can be provided in the middle and around the perimeter of the housing 6 to support the cover plate 7. A hole is provided in the middle of the bottom plate of the housing 6, and the insertion part 2-2 of the first lead electrode 2 extends out of the hole to connect to the PCB board. The housing 6 can be made of materials such as PBT, polyphenylene sulfide (PPS), PEEK, and PC. The cover plate 7 has a first reserved hole 7-1 and multiple second reserved holes 7-2. The first reserved hole 7-1 is used to accommodate the first lead electrode 2, and the second reserved holes 7-2 are used to accommodate the second lead electrode 5. Correspondingly, the first reserved hole 7-1 is circular, and the second reserved holes 7-2 are rectangular. The buckle 5-2 is snapped onto the cover plate 7 to achieve a tight connection. The cover plate 7 can also be provided with a threaded connection structure around its perimeter for fastening connection with the housing 6.

[0044] The cover plate 7 is also provided with a filling hole for filling the housing with insulating material. The insulating material can be epoxy resin, silicone resin, polyurethane, etc., or it can be insulating gases such as perfluorinated carbon, sulfur hexafluoride, nitrogen, and ultrapure air.

[0045] In this embodiment, an insulating plate 8 is provided between adjacent capacitor cores, and the insulating plate 8 can be made of PBT material. Alternatively, an insulating sleeve fitted onto each capacitor core group can be used instead of an insulating plate.

[0046] This integrated capacitor features a fully sealed design, providing better moisture resistance and meeting the moisture-proof and vibration-resistant requirements of high-performance electronic circuit equipment.

[0047] In this embodiment, the capacitor core 1 is formed by winding a dielectric film and an electrode material layer around a core tube, and it can be cylindrical or flattened. The dielectric film is made of polypropylene (PP), polyethylene terephthalate (PET), polyimide (PI), polyetheretherketone (PEEK), polyethylene naphthalate (PEN), polystyrene (PS), capacitor paper, or mica paper, and the core tube is made of polybutylene terephthalate (PBT), PET, polycarbonate (PC), or polyamide (PA).

[0048] In this embodiment, the assembled integrated capacitor housing base plate is directly inserted into the PCB board surface on one side, and the opposite side is attached to the PCB board surface. It is then soldered to the PCB board via the clip 5-2 of the second connecting electrode 5, making the operation convenient.

[0049] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An integrated capacitor, characterized in that, It includes multiple capacitor core groups connected in parallel. Each capacitor core group includes multiple capacitor cores (1) connected in series. Each capacitor core group is connected to a first lead electrode (2) through a first connecting piece (3), and the length of the first connecting piece of each capacitor core group is the same.

2. The integrated capacitor according to claim 1, characterized in that, Each capacitor core group includes two capacitor cores (1) arranged side by side. One end of the two capacitor cores is connected by a second connecting piece (4), and the other end is provided with a positive terminal and a negative terminal, forming a U-shaped series structure.

3. The integrated capacitor according to claim 2, characterized in that, The second connecting piece (4) is oblong, with terminal holes (4-1) at both ends for accommodating the terminals of the capacitor core, and multiple welding strips (4-2) extending radially outward on the outer periphery of both ends.

4. The integrated capacitor according to claim 3, characterized in that, The terminals of the capacitor core are formed by gold spraying or tin dipping, and the materials of the terminals are tin-zinc, zinc, babbitt alloy, aluminum, tin, or zinc-aluminum alloy.

5. The integrated capacitor according to claim 1, characterized in that, The first lead-out electrode (2) is cylindrical, with multiple connecting portions (2-1) distributed circumferentially and extending outward at one end; multiple capacitor core groups surround the first lead-out electrode, and one terminal of each capacitor core group is connected to a connecting portion through the first connecting piece (3); and / or The other end of the first lead electrode is provided with a plurality of plug-in portions (2-2) distributed circumferentially and extending outward, the plug-in portions being used to plug into the PCB board.

6. The integrated capacitor according to claim 5, characterized in that, The first connecting piece (3) includes a sleeve ring (3-1) and a connecting piece (3-2) connected to the sleeve ring radially. The length of the first connecting piece refers to the length L from the center of the sleeve ring to the edge of the connecting piece (3-2). The outer periphery of the sleeve ring is also provided with a plurality of welding pieces (3-3) distributed circumferentially.

7. The integrated capacitor according to claim 1, characterized in that, Each capacitor core assembly also includes a second lead electrode (5), which includes a U-shaped electrode lead plate (5-1) with a buckle (5-2) perpendicularly provided on the edge of the electrode lead plate.

8. The integrated capacitor according to claim 7, characterized in that, It also includes a housing (6) and a cover plate (7), the cover plate covering the housing, the cover plate having a first reserved hole (7-1) and a plurality of second reserved holes (7-2), the first reserved hole being used to accommodate a first lead electrode, the second reserved holes being used to accommodate a second lead electrode, and the buckle being snapped onto the cover plate; The cover plate (7) is also provided with a filling hole (7-3) for filling the housing with insulating material.

9. The integrated capacitor according to claim 1, characterized in that, An insulating plate (8) is provided between adjacent capacitor cores.

10. The integrated capacitor according to claim 1, characterized in that, The capacitor core is formed by winding a dielectric film and an electrode material layer around a core tube. The dielectric film is made of polypropylene (PP), polyethylene terephthalate (PET), polyimide (PI), polyetheretherketone (PEEK), polyethylene naphthalate (PEN), polystyrene (PS), capacitor paper, or mica paper. The core tube is made of polybutylene terephthalate (PBT), PET, polycarbonate (PC), or polyamide (PA).

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