High-end inverter high-current end-plate capacitor

Abstract

The utility model discloses a high -end inverter high -current end piece formula capacitor, including by the core, and the capacitor shell that cladding setting in the capacitor main part of core outside is constituted, the both ends of core are connected with the connecting terminal through the electrode sheet, and the connecting terminal is including the terminal main part, and is set up in the head of terminal main part, and with the plug connector of electrode sheet connection, the tail of plug connector is equipped with the card hole. The utility model solves the problem of insufficient of capacitor in prior art to the high current resistance, and the high heat release, the fast temperature rise and the short service life.

Description

Technical Field

[0001] This utility model relates to the field of capacitor structure, and in particular to a high-current end-plate capacitor for high-end inverters. Background Technology

[0002] A capacitor is formed by two conductors placed close together with a non-conductive insulating medium sandwiched in between. Capacitors play an important role in circuits for tuning, bypassing, coupling, and filtering.

[0003] Existing capacitors typically have a single-piece connection terminal structure, meaning the terminal is a single wire with no openings on its surface. Furthermore, the connection between the terminal and the electrode inside the capacitor body is achieved through direct welding. As a result, after the terminal is inserted into a circuit board, the terminal leads are not subjected to sufficient force, and the connection between the terminal and the electrode is not capable of carrying large currents. In addition, the high heat generation of current capacitors is also a problem that urgently needs to be addressed.

[0004] In view of this, this technical solution proposes a high-current end-plate capacitor for high-end inverters. It adopts an end-plate terminal pin structure, and the capacitor body and electrode plates are connected by a plug-in method, which not only improves processing efficiency but also enhances the high current withstand capability. A locking hole is opened at the tail, which can be used with clips (such as screws) for insertion into the plate, thereby increasing the stress and extending the service life. Furthermore, a smooth metal film is vapor-deposited as the core film layer, which makes the capacitor body generate less heat and has a small temperature rise, making it particularly suitable for high-frequency, high-current applications and harsh environments. Utility Model Content

[0005] The present invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the main objective of this invention is to provide a high-current end-plate capacitor for high-end inverters, addressing the problems of insufficient current tolerance, rapid heat generation at high temperatures, and short service life of existing capacitors.

[0006] To achieve the above objectives, this utility model provides a high-current chip capacitor for high-end inverters, comprising a capacitor body consisting of a core and a capacitor shell covering the core.

[0007] The two ends of the core are connected to the connection terminals via electrode plates.

[0008] The connection terminal includes a terminal body and a connector disposed at the head of the terminal body and connected to the electrode plate, and the tail of the connector is provided with a locking hole.

[0009] As a further improvement of this invention, the outer surface layer of the core is provided with a smooth metal film structure.

[0010] As a further embodiment of this invention, a flame-retardant filling layer is provided between the core and the capacitor shell.

[0011] As a further embodiment of this utility model, the connector is a tin-plated copper sheet structure. After the tin-plated copper sheet is inserted, a fitting connection position is formed at the connection with the electrode sheet.

[0012] As a further improvement of this utility model, the capacitor shell is an integrated fire-resistant plastic shell structure.

[0013] As a further embodiment of this invention, the electrode sheet and the connection position are connected by an aluminum-zinc wire metal connection layer.

[0014] The beneficial effects of this utility model are as follows:

[0015] This technical solution employs a tin-plated copper sheet connector to form an interlocking connection with the electrode sheet, combined with an aluminum-zinc wire metal connection layer to significantly increase the contact area and mechanical interlocking strength, thereby significantly reducing connection resistance and local temperature rise. The connector's tail-end locking design uses external locking components to enhance pin stress and prevent vibration-induced loosening. The smooth metal film structure of the core eliminates film layer gaps, reducing eddy current losses. A flame-retardant filler layer combined with an integrated flame-retardant plastic shell achieves efficient heat dissipation and dual flame protection. Ultimately, this results in a capacitor with a smoother temperature rise under high-current, high-frequency operating conditions, stronger tolerance, and a significantly extended safe lifespan. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the technical solutions of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram showing the arrangement of the various components of the capacitor body in this utility model.

[0018] Figure 2 This is a schematic diagram of the connection terminal structure in this utility model.

[0019] Figure 3 This is a schematic diagram showing the state of the connection terminal after it is connected to the capacitor body in this utility model.

[0020] Figure 4 This is a schematic diagram of a capacitor structure in the prior art.

[0021] label name label name 1 Capacitor body 14 Connection terminals 10 capacitor casing 140 Terminal body 11 core 141 connector 110 Smooth metal film 142 Snap 12 electrode plate 15 Flame-retardant filler layer 13 Connection bit Detailed Implementation

[0022] as follows:

[0023] Please see the appendix Figure 1-4 ,

[0024] The main structure includes a capacitor body (1) consisting of a core (11) and a capacitor shell (10) covering the outside of the core (11). The two ends of the core (11) are connected to the connecting terminal (14) through electrode plates (12). The connecting terminal (14) includes a terminal body (140) and a plug disposed at the head of the terminal body (140) and connected to the electrode plate (12). The tail of the plug is provided with a locking hole (142).

[0025] The working principle is as follows:

[0026] Traditional capacitors use single wire-shaped terminals directly welded to the electrode plates (12). Under high current conditions, they are prone to rapid temperature rise, poor resistance and shortened life due to stress concentration at the connection and insufficient contact area.

[0027] This technical solution adopts a split design for the connecting terminal (14). The tin-plated copper connector at its head is inserted into the electrode plate (12) to form an interlocking structure. Combined with the aluminum-zinc wire metal connection layer to strengthen the bond, it greatly increases the contact area and mechanical interlocking force between the terminal and the electrode plate (12), simplifies the assembly process, ensures uniform heat distribution when a large current passes through, and avoids local overheating. At the same time, the locking hole (142) at the tail of the connector is designed to facilitate locking with screws and other fasteners during installation, significantly enhancing the stress resistance of the terminal pins on the circuit board and preventing loosening of the connection due to vibration or current surge. The surface of the core (11) adopts a smooth metal film (110) structure to reduce eddy current losses under high-frequency current, thereby reducing heat generation from the source. The core (11) is filled with a flame-retardant filling layer (15) between itself and the integrated flame-retardant plastic shell, improving heat dissipation efficiency and blocking the spread of flames during internal short circuits. The capacitor provided by this solution has a gradual overall temperature rise, stronger tolerance in high-current, high-frequency scenarios such as inverters, and a significantly extended service life.

[0028] Reference Appendix Figure 1 In a preferred embodiment of this utility model, the outer surface of the core (11) is provided with a smooth metal film (110) structure.

[0029] Specifically, in this solution, the smooth metal film (110) structure on the outer surface of the core (11) forms a flat and gapless surface through a vapor deposition process, which ensures that the double-layer film inside the capacitor is tightly bonded, eliminates micro-gaps in traditional processes, significantly increases the effective conductive area, reduces contact resistance and eddy current loss when current passes through, thereby reducing heat generation and improving current carrying efficiency under high frequency and high current.

[0030] Reference Appendix Figure 1 In a preferred embodiment of this utility model, a flame-retardant filling layer (15) is provided between the core (11) and the capacitor shell (10).

[0031] In this technical solution, the flame-retardant filling layer (15) between the core (11) and the capacitor shell (10) can quickly conduct the heat generated by the core (11) to the shell for dissipation, effectively reducing the overall temperature rise of the capacitor. It can also form a barrier layer when an abnormal short circuit occurs inside, preventing the flame from spreading outward and improving safety and reliability.

[0032] Reference Appendix Figure 1 , 2 In a preferred embodiment of this utility model, the connector is a tin-plated copper sheet structure. After the tin-plated copper sheet is inserted, a fitting connection position (13) is formed at the connection with the electrode sheet (12).

[0033] In this scheme, after the tin-plated copper sheet plug is inserted into the electrode sheet (12), a mating structure is formed. The physical interlocking greatly increases the contact area of ​​the connection position (13), ensuring stable conduction of large current. At the same time, the tin plating layer enhances the oxidation resistance, and the aluminum-zinc wire metal connection layer further strengthens the bonding strength, effectively reducing resistance heating and improving stability.

[0034] Reference Appendix Figure 1 In a preferred embodiment of this utility model, the capacitor shell (10) is an integrated fire-resistant plastic shell structure.

[0035] Specifically, the integrated fire-resistant plastic shell structure avoids the heat dissipation weaknesses and leakage risks of traditional spliced ​​shells. Its fire-resistant material can block the spread of flames when the temperature is high or short-circuited, while the plastic properties have both insulation and heat dissipation functions, improving the overall safety of the capacitor.

[0036] Reference Appendix Figure 1 In a preferred embodiment of this utility model, the electrode sheet (12) and the connection position (13) are connected by an aluminum-zinc wire metal connection layer.

[0037] In this technical solution, the aluminum-zinc wire metal connection layer between the electrode sheet (12) and the connection position (13) ensures smoother current flow through its low resistance characteristics. At the same time, its flexibility fills the tiny gaps in the interlocking structure, enhances connection stability and conductivity, and effectively suppresses the risk of oxidation cracking and vibration loosening under high current conditions.

[0038] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. Any equivalent structural transformations made using the contents of the present utility model specification and drawings under the concept of the present utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high-current end-plate capacitor for high-end inverters, characterized in that, include A capacitor body consists of a core and a capacitor shell covering the outside of the core. The two ends of the core are connected to the connection terminals via electrode plates. The connection terminal includes a terminal body and a connector disposed at the head of the terminal body and connected to the electrode plate, and the tail of the connector is provided with a locking hole.

2. The high-current chip capacitor for high-end inverters according to claim 1, characterized in that, The outer surface of the core is provided with a smooth metal film structure.

3. The high-current chip capacitor for high-end inverters according to claim 1, characterized in that, A flame-retardant filler layer is provided between the core and the capacitor shell.

4. The high-current end-plate capacitor for high-end inverters according to claim 1, characterized in that, The connector is a tin-plated copper sheet structure. After the tin-plated copper sheet is inserted, it forms a fitting connection position at the connection with the electrode sheet.

5. The high-current chip capacitor for high-end inverters according to claim 1, characterized in that, The capacitor casing is a one-piece fire-resistant plastic casing structure.

6. The high-current chip capacitor for high-end inverters according to claim 4, characterized in that, The electrode sheet and the connection position are connected by an aluminum-zinc wire metal connection layer.

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