A low inductance capacitor
By employing a stacked structure of sheet-like conductive plates and insulating components in the capacitor, the connection area is increased and the current loop is shortened, thus solving the high inductance problem caused by the electrode lead-out structure and realizing a low-inductance capacitor design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SHUNDE CHUANGGE ELECTRONIC IND CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-08-04
AI Technical Summary
The electrode lead structure of existing capacitors results in excessively high inductance, which cannot meet the requirements for low inductance. This is mainly due to the current concentration effect and the magnetic field superposition caused by the electrode spacing, which increases the inductance.
The first and second conductive sheets, which adopt a sheet-like structure, are connected to the core element, isolated by an insulating component and stacked together to increase the connection area and shorten the current loop, thereby reducing local inductance.
By increasing the connection area and shortening the current loop, the inductance of the capacitor is significantly reduced, high-frequency performance is improved, and problems such as current accumulation and magnetic field superposition are reduced.
Smart Images
Figure CN224595381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of capacitors, and more particularly to a low-inductance capacitor. Background Technology
[0002] In electronic circuits, capacitors serve as core energy storage and filtering components, and their inductance (equivalent series inductance, ESL) is a key parameter determining high-frequency performance. If the capacitor's inductance is too high, it will directly cause it to be unable to respond quickly to voltage changes in high-frequency operating conditions (such as switching power supply filtering, high-frequency resonant circuits, etc.). Therefore, controlling the capacitor's inductance is crucial. Existing capacitor electrode lead structures commonly use raised electrode posts or nut terminals as electrode leads. This type of structure has significant inductive drawbacks: Firstly, the connection area between the electrode post / nut terminal and the core is usually small, causing current to concentrate at the connection point as it flows from the core to the lead terminals, creating a "current pooling effect." This pooled current generates a locally strong magnetic field, which, after superposition, significantly increases the local inductance. Secondly, the two lead terminals correspond to the two electrodes of the core, and the natural spatial gap between their positions results in a large loop area after the current flows out from the two terminals. Based on the positive correlation between inductance and loop area, this further increases the overall inductance of the capacitor. For the reasons mentioned above, the existing electrode lead-out structure is no longer sufficient to meet the requirements for low inductance, and there is an urgent need to reduce the inductance of the capacitor by optimizing the electrode lead-out structure. Utility Model Content
[0003] In order to overcome at least one of the defects described in the prior art, the present invention provides a low-inductance capacitor that reduces its own inductance by increasing the connection area between the two electrode connecting posts and the core.
[0004] The technical solution adopted by this utility model to solve its problem is: A low-inductance capacitor, comprising: Core components; An electrode lead-out assembly includes a first conductive sheet, a second conductive sheet, an insulating component, and an electrical connecting strip. The first conductive sheet is attached to the top end face of the core element and is electrically connected to the core element. A first electrode connecting post is provided on the first conductive sheet. The insulating component is attached to the end face of the first conductive sheet, the second conductive sheet is attached to the insulating component, one end of the electrical connecting strip is electrically connected to the second conductive sheet, and the other end of the electrical connecting strip is electrically connected to the bottom end of the core element; the second conductive sheet is provided with a second electrode connecting post.
[0005] Furthermore, a first connecting piece is provided at the bottom end of the first electrode connecting post. The first connecting piece surrounds the outer periphery of the first electrode connecting post and protrudes from the periphery of the first electrode connecting post. The first connecting piece is electrically connected to the first conductive piece.
[0006] Furthermore, a second connecting piece is provided at the bottom end of the second electrode connecting post. The second connecting piece surrounds the outer periphery of the second electrode connecting post and protrudes from the periphery of the second electrode connecting post. The second connecting piece is electrically connected to the second conductive piece.
[0007] Furthermore, the insulating component has at least two bent sections, which are symmetrically distributed at both ends of the insulating component. The two bent sections are bent along the axial direction of the core element and cover the outer periphery of the core element.
[0008] Furthermore, one end of the electrical connecting strip is connected to the second conductive sheet, and the other end of the electrical connecting strip is bent along the extension direction of the bent section and extends to the bottom end of the core element.
[0009] Furthermore, at least four electrical connecting strips are provided, and the four electrical connecting strips are distributed at intervals along the circumference of the core element. At least four bending segments are provided on the insulating component, and the at least four bending segments are arranged in a one-to-one correspondence with the at least four electrical connecting strips. Furthermore, the outer diameter of the second conductive sheet is d, and the outer diameter of the insulating component is D, where d < D.
[0010] Furthermore, the insulating component is provided with a first through hole, the second conductive sheet is provided with a second through hole, and the first electrode connecting post extends out of the end face of the core element through the first through hole and the second through hole.
[0011] Furthermore, the insulating element is insulating paper.
[0012] Furthermore, both the first and second conductive sheets are made of copper.
[0013] In summary, the low-inductance capacitor provided by this utility model has the following technical effects: During assembly, the first conductive sheet is directly attached to the top face of the core element, and the second conductive sheet is laminated and attached to the first conductive sheet via an insulating component, and connected to the bottom face of the core element via an electrical connecting strip. By using the sheet-like structure of the first and second conductive sheets, the effective connection area between the first and second electrode connecting posts and the core element is increased. Thus, when current is output from the core element, it can be evenly distributed and transmitted through the large area of the first and second conductive sheets, reducing the problem of current concentration at small connection points in traditional structures, thereby weakening the superposition of strong local magnetic fields and reducing local inductance from the source. Furthermore, the first and second conductive sheets are arranged close together in space through a stacked structure (isolated by an insulating component), which significantly reduces the current loop area of the two electrodes (in traditional structures, there is a significant spatial gap between the two electrode posts). Based on the positive correlation between inductance and current path length and loop area, this design can effectively reduce path inductance and further reduce the overall inductance of the capacitor. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a structural schematic diagram from another perspective of the present invention; Figure 4 This is a schematic diagram of the assembly of the first conductive sheet and the core component in this utility model; Figure 5 This is a schematic diagram of the assembly of the insulating component and the core element in this utility model; Figure 6 This is a schematic diagram of the assembly of the electrode lead-out assembly and the core element in this utility model.
[0016] The meanings of the reference numerals in the attached figures are as follows: 10. Core component; 20. First conductive sheet; 21. First electrode connecting post; 211. First connecting piece; 30. Second conductive sheet; 31. Second electrode connecting post; 311. Second connecting piece; 32. Second through hole; 40. Insulating component; 41. Bending section; 42. First through hole; 50. Electrical connecting strip. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0019] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0021] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.
[0022] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.
[0023] See Figures 1 to 6This utility model discloses a low-inductance capacitor, including a core element 10 and an electrode lead-out assembly. The electrode lead-out assembly includes a first conductive sheet 20, a second conductive sheet 30, an insulating member 40, and an electrical connecting strip 50. The first conductive sheet 20 is attached to the top end face of the core element 10 and is electrically connected to the core element 10. A first electrode connecting post 21 is provided on the first conductive sheet 20. The insulating member 40 is attached to the end face of the first conductive sheet 20. The second conductive sheet 30 is attached to the insulating member 40. One end of the electrical connecting strip 50 is electrically connected to the second conductive sheet 30, and the other end of the electrical connecting strip 50 is electrically connected to the bottom end of the core element 10. A second electrode connecting post 31 is provided on the second conductive sheet 30.
[0024] Based on the above structure, during assembly, the first electrode connecting post 21 and the first conductive sheet 20 are first integrally formed or rigidly conductively connected. Then, the first conductive sheet 20 is attached to the top of the core element 10, forming a conductive connection with the top electrode of the core element 10 through surface contact. The current can be gathered through the first conductive sheet 20 to the first electrode connecting post 21 and output to the external circuit, completing the lead-out of the top electrode. Subsequently, the second electrode connecting post 31 and the second conductive sheet 30 are integrally formed or rigidly conductively connected. An insulating part 40 (with through holes for the first electrode connecting post 21 to extend) is covered on the first conductive sheet 20. Then, the second conductive sheet 30 is attached to the insulating part 40. At the same time, the second conductive sheet 30 is electrically connected to the bottom surface of the core element 10 using an electrical connecting strip 50. The current is gathered through the second conductive sheet 30 to the second electrode connecting post 31 and output to the external circuit, completing the lead-out of the bottom electrode.
[0025] Specifically, the insulating component 40, through its through-hole structure, allows the first electrode connecting post 21 to be led out normally while simultaneously achieving electrical isolation between the first conductive sheet 20 and the second conductive sheet 30, preventing short circuits. This also allows the two electrodes of the core element 10 to be led out via their respective independent paths without interference. Furthermore, the surface contact between the first conductive sheet 20 and the top of the core element 10, and the overlapping bonding of the second conductive sheet 30 with the first conductive sheet 20 via the insulating component 40, significantly increases the effective connection area between the first electrode connecting post 21, the second electrode connecting post 31, and the core element 10. When current is output from the core element 10, it can be evenly distributed and transmitted through the large area of the first conductive sheet 20 and the second conductive sheet 30, reducing the problem of current concentration at small connection points in traditional structures. This weakens the superposition of local strong magnetic fields and reduces local inductance from the source.
[0026] Furthermore, compared to the traditional structure where the two electrode posts are independently led out from both sides or ends of the core element 10, resulting in a large current loop area and long path leading to high inductance, in this embodiment, the first conductive sheet 20 and the second conductive sheet 30 are stacked (the spacing is determined by the thickness of the insulating component 40), allowing the lead-out paths of the two electrodes on the core element 10 to be spatially very close. After the current flows out from the first electrode connection post 21, it flows back to the second electrode connection post 31 through the external circuit, and then returns to the bottom of the core element 10 through the second conductive sheet 30 and the electrical connection strip 50. The formed loop area is greatly reduced, which geometrically reduces the physical basis for inductance generation and further reduces the loop inductance.
[0027] It should be noted that in this embodiment, the first conductive sheet 20, the first electrode connecting post 21, the second conductive sheet 30, and the second electrode connecting post 31 can all be made of highly conductive metal materials (such as aluminum or copper). During assembly, the first conductive sheet 20 is welded to the top surface of the core element 10, and the insulating component 40 directly covers the surface of the first conductive sheet 20 (it can be fixed with the aid of a very thin layer of high-temperature resistant insulating adhesive). The through hole on the insulating component 40 is fitted onto the first electrode connecting post 21, and radial positioning is achieved through the gap fit between the hole wall and the first electrode connecting post 21 to prevent the insulating component 40 from shifting. Subsequently, the second conductive sheet 30 is attached to the surface of the insulating component 40, and a tight fit can be achieved through mechanical pressing (such as mold pressure). If further fixation is required, the same type of insulating adhesive can be applied to the non-conductive areas at the edges of the second conductive sheet 30 and the insulating component 40 for fixation (avoiding covering the conductive areas).
[0028] In addition, the insulating element 40 in this embodiment can be selected from existing insulating paper or other sheet-like insulating elements 40 (such as polyester film, polytetrafluoroethylene sheet).
[0029] Furthermore, a first connecting piece 211 is provided at the bottom end of the first electrode connecting post 21. The first connecting piece 211 surrounds the outer periphery of the first electrode connecting post 21 and protrudes from the periphery of the first electrode connecting post 21. The first connecting piece 211 is electrically connected to the first conductive piece 20.
[0030] Specifically, the structure of the first connecting piece 211 protruding from the periphery of the first electrode connecting post 21 further expands the effective connection area between the first electrode connecting post 21 and the first conductive piece 20. Compared to the small-area contact where the first electrode connecting post 21 directly connects to the first conductive piece 20, this design allows the current to be evenly distributed in the large-area contact area between the first connecting piece 211 and the first conductive piece 20, reducing the problem of current accumulation, making the magnetic field distribution more dispersed, and reducing the inductance generated by the superposition of local strong magnetic fields.
[0031] In addition, the first connecting piece 211 and the first conductive piece 20 can be bonded together by welding, pressing or other methods, which can minimize the air gap between them. Compared with traditional small-area connections, which are prone to small gaps due to loose contact, resulting in magnetic field disturbance during current transmission, this embodiment tightly bonds the first connecting piece 211 and the first conductive piece 20, eliminating this hidden danger and further reducing the local inductance of the contact area.
[0032] Furthermore, a second connecting piece 311 is provided at the bottom end of the second electrode connecting post 31. The second connecting piece 311 surrounds the outer periphery of the second electrode connecting post 31 and protrudes from the periphery of the second electrode connecting post 31. The second connecting piece 311 is electrically connected to the second conductive piece 30.
[0033] Specifically, the second connecting piece 311 protrudes from the periphery of the second electrode connecting post 31, further expanding the effective connection area between the second electrode connecting post 31 and the second conductive piece 30. Compared to the method where the second electrode connecting post 31 directly contacts the second conductive piece 30 over a small area, the current can be evenly distributed over the large contact area between the second connecting piece 311 and the second conductive piece 30, avoiding the current concentration at small contact points. This uniform current distribution also makes the magnetic field distribution more dispersed, thereby reducing the inductance generated by the superposition of local strong magnetic fields and lowering the possibility of inductance generation at the source of current transmission.
[0034] Similarly, the second connecting piece 311 and the second conductive piece 30 can be bonded together by welding, pressing, or other methods. This connection method minimizes the air gap between them. Compared to traditional small-area connections, which are prone to tiny gaps due to insufficient contact, these gaps can cause magnetic field disturbances during current transmission, indirectly increasing inductance. In this embodiment, the second connecting piece 311 and the second conductive piece 30 are tightly bonded together, effectively eliminating this potential hazard and further reducing the local inductance at the contact point.
[0035] Furthermore, the insulating member 40 is provided with at least two bent sections 41, which are symmetrically distributed at both ends of the insulating member 40. The two bent sections 41 are bent along the axial direction of the core element 10 and cover the outer periphery of the core element 10.
[0036] Specifically, after the symmetrical bending sections 41 at both ends of the insulating component 40 are bent along the axial direction of the core element 10, they can closely fit the outer side of the core element 10, which is equivalent to adding an insulating barrier between the core element 10 and the external environment. This can block the contact between the conductive medium that may exist on the outer side of the core element 10 and the first conductive sheet 20, and reduce the risk of short circuit caused by external factors.
[0037] In addition, the bending section 41 can also isolate the outer periphery of the core element 10 from unnecessary contact with the second conductive sheet 30 and the electrical connecting strip 50, and prevent the electrode layer that may be exposed on the side edge of the core element 10 (such as the side edge electrode formed by the winding of the core element 10) from forming an additional conductive path with the second conductive sheet 30 and the electrical connecting strip 50, so that the second conductive sheet 30 is only connected to the bottom electrode of the core element 10 through the electrical connecting strip 50, thus maintaining the independence of the electrode lead-out.
[0038] Furthermore, one end of the electrical connecting strip 50 is connected to the second conductive sheet 30, and the other end of the electrical connecting strip 50 is bent along the extension direction of the bending section 41 and extends to the bottom end of the core element 10.
[0039] Specifically, when the bent section 41 covers the outer periphery of the core element 10, it effectively forms an isolation between the core element 10 and external components. As the electrical connecting strip 50 extends along the bent section 41, it is confined within the space between the bent section 41 and the outer periphery of the core element 10, preventing contact with components such as the first conductive sheet 20 and the first electrode connecting post 21, thus avoiding the risk of short circuits. Simultaneously, the orientation of the electrical connecting strip 50 is regulated by the bent section 41, preventing tangling or friction with other structures due to random extension, reducing conductivity degradation caused by wear, ensuring the continuity of current transmission, and indirectly maintaining a low inductance state.
[0040] More specifically, in this embodiment, at least four electrical connecting strips 50 are provided, which are distributed circumferentially around the core element 10. At least four bent sections 41 are provided on the insulating member 40, each corresponding to one of the at least four electrical connecting strips 50. By distributing at least four electrical connecting strips 50 circumferentially, multiple parallel conductive channels are established between the bottom electrode of the core element 10 and the second conductive sheet 30. Compared to a method where a few electrical connecting strips 50 concentrate current transmission, this allows the current to be evenly distributed at the bottom of the core element 10, flowing to the second conductive sheet 30 through different electrical connecting strips 50, thus preventing current from concentrating on a single electrical connecting strip 50. The uniform distribution of current also makes the magnetic field distribution more dispersed, reducing the inductance generated by the superposition of local strong magnetic fields.
[0041] Simultaneously, at least four bent segments 41 on the insulating component 40 are corresponding one-to-one with at least four electrical connecting strips 50. During assembly, each electrical connecting strip 50 is tightly fitted to the surface of the corresponding bent segment 41 and extends along the extension direction (axial direction) of the bent segment 41 to the bottom end of the core element 10. Since the bent segment 41 itself is made of insulating material, when the surface of the bent segment 41 is fitted with the electrical connecting strip 50, an "insulating isolation layer" can be formed, blocking the contact between the electrical connecting strip 50 and the conductive medium that may exist on the outer periphery of the core element 10.
[0042] It should be noted that the width of the bent section 41 in this embodiment is slightly larger than that of the electrical connecting strip 50, which can form a shield from both sides of the electrical connecting strip 50, preventing it from shifting to the side during vibration. This effectively reduces the problem of the electrical connecting strip 50 contacting the first conductive sheet 20 (located near the side of the top of the core) or the exposed electrode layer inside the core element 10, thus reducing the risk of short circuits. In addition, the number of electrical connecting strips 50 can be four, five, six or more, and the bent sections 41 on the insulating member 40 are set according to the number of electrical connecting strips 50, corresponding one-to-one.
[0043] Furthermore, the outer diameter of the second conductive sheet 30 is d, and the outer diameter of the insulating member 40 is D, where d < D.
[0044] Specifically, if the outer diameters of the second conductive sheet 30 and the insulating member 40 are close (d≈D), the tiny protrusions on the edge of the second conductive sheet 30 may exceed the coverage area of the insulating member 40, directly forming local contact with the first conductive sheet 20, or even breaking through the insulation layer and causing a short circuit. Therefore, in this embodiment, d<D, that is, the outer diameter of the insulating member 40 is larger than the outer diameter of the second conductive sheet 30. When the second conductive sheet 30 and the first conductive sheet 20 are laminated together through the insulating member 40, the insulating member 40 will form a radially extending insulating edge around the outer periphery of the second conductive sheet 30. This insulating edge can act like a "guardrail" to actively cover the edge area of the second conductive sheet 30. Even if the edge of the second conductive sheet 30 has burrs, protrusions, or unevenness due to processing errors, it will be completely isolated inside by the insulating edge, preventing the second conductive sheet 30 from contacting the first conductive sheet 20 and reducing the risk of short circuit.
[0045] More specifically, the insulating component 40 is provided with a first through hole 42, and the second conductive sheet 30 is provided with a second through hole 32. The first electrode connecting post 21 extends out of the end face of the core element 10 through the first through hole 42 and the second through hole 32. The first through hole 42 and the second through hole 32 together form a channel for the first electrode connecting post 21 to pass through, allowing the first electrode connecting post 21 to pass smoothly through the insulating component 40 and the second conductive sheet 30, and extend out of the end face of the core element 10, thereby connecting with the external circuit so that the electrode at the top of the core element 10 can be led out.
[0046] It should be noted that the diameter of the first through hole 42 matches the diameter of the first electrode connecting post 21, and the inner diameter of the second through hole 32 is larger than the outer diameter of the first electrode connecting post 21. This ensures that after the insulating component 40 mates with the first electrode connecting post 21 through the first through hole 42, it can isolate the first electrode connecting post 21 from the second conductive sheet 30, preventing direct contact between the first electrode connecting post 21 and the second conductive sheet 30 that could lead to a short circuit. Simultaneously, it also prevents the first electrode connecting post 21 from contacting the periphery of the second through hole 32 when passing through it, further reducing the risk of a short circuit.
[0047] Preferably, the insulating component 40 in this embodiment is insulating paper, such as Nomex insulating paper or blue shell paper, which not only has good insulation performance, but also has a certain degree of flexibility and toughness, which can better fit the surface of the core component 10 and the first conductive sheet 20, and also facilitates the processing and forming of the bending section 41.
[0048] In addition, both the first conductive sheet 20 and the second conductive sheet 30 are sheet-like structures made of copper. The excellent conductivity of copper allows the current to be transmitted more smoothly and efficiently on the conductive sheet, reducing losses during the current transmission process. Combined with the sheet-like design, the overall conductivity is further improved.
[0049] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.
Claims
1. A low-inductance capacitor, characterized in that, include: Core components; An electrode lead-out assembly includes a first conductive sheet, a second conductive sheet, an insulating component, and an electrical connecting strip. The first conductive sheet is attached to the top end face of the core element and is electrically connected to the core element. A first electrode connecting post is provided on the first conductive sheet. The insulating component is attached to the end face of the first conductive sheet, the second conductive sheet is attached to the insulating component, one end of the electrical connecting strip is electrically connected to the second conductive sheet, and the other end of the electrical connecting strip is electrically connected to the bottom end of the core element; the second conductive sheet is provided with a second electrode connecting post.
2. The low-inductance capacitor as described in claim 1, characterized in that, The bottom end of the first electrode connecting post is provided with a first connecting piece. The first connecting piece surrounds the outer periphery of the first electrode connecting post and protrudes from the periphery of the first electrode connecting post. The first connecting piece is electrically connected to the first conductive piece.
3. The low-inductance capacitor as described in claim 1, characterized in that, The bottom end of the second electrode connecting post is provided with a second connecting piece. The second connecting piece surrounds the outer periphery of the second electrode connecting post and protrudes from the periphery of the second electrode connecting post. The second connecting piece is electrically connected to the second conductive piece.
4. The low-inductance capacitor as described in claim 1, characterized in that, The insulating component has at least two bent sections, which are symmetrically distributed at both ends of the insulating component. The two bent sections are bent along the axial direction of the core element and cover the outer periphery of the core element.
5. The low-inductance capacitor as described in claim 4, characterized in that, One end of the electrical connecting strip is connected to the second conductive sheet, and the other end of the electrical connecting strip is bent along the extension direction of the bent section and extends to the bottom of the core element.
6. The low-inductance capacitor as described in claim 5, characterized in that, The electrical connecting strips are provided at least four, and the four electrical connecting strips are distributed at intervals along the circumference of the core element. The insulating component is provided with at least four bending segments, and the at least four bending segments are arranged in a one-to-one correspondence with the at least four electrical connecting strips.
7. The low-inductance capacitor as described in any one of claims 1-6, characterized in that, The outer diameter of the second conductive sheet is d, and the outer diameter of the insulating component is D, where d < D.
8. The low-inductance capacitor as described in any one of claims 1-6, characterized in that, The insulating component has a first through hole, the second conductive sheet has a second through hole, and the first electrode connecting post extends out of the end face of the core element through the first through hole and the second through hole.
9. The low-inductance capacitor according to any one of claims 1-6, characterized in that, The insulating component is insulating paper.
10. The low-inductance capacitor according to any one of claims 1-6, characterized in that, The first conductive sheet and the second conductive sheet are made of copper.