Multi-electrode MOV device structure

Abstract

The utility model discloses a multi-electrode MOV device structure, which comprises an MOV substrate body, a first surface and a second surface are respectively arranged on the front side and the back side of the MOV substrate body, the first surface or the second surface is provided with an integrally formed first electrode or at least two mutually isolated second electrodes, and an insulation gap with a preset voltage isolation distance is arranged between the second electrodes. According to the utility model, the combustion problem of the surge protection device is completely solved, and the disconnector in the surge protection device is ensured to be timely separated from a power grid when the surge protection device is aged. All external disconnectors for preventing the surge protection device from being on fire do not need to be installed in front of the surge protection device, a large amount of materials, manpower and material resources can be reduced, the project investment cost is reduced, the external disconnectors are reduced, and the UP value of a secondary circuit is reduced. On the basis of the principle that the original appearance of the surge protection device is not changed, the internal structure of the surge protection device is transformed and innovated, so that the common use of the original surge protection device base is met, and the product is ensured to meet the national standard requirement.

Description

Technical Field

[0001] This utility model relates to the field of MOV varistors, specifically to a multi-electrode MOV device structure. Background Technology

[0002] Metal oxide varistors (MOVs), as typical voltage-limiting components, are widely used in overvoltage and lightning surge protection in AC / DC circuit systems. Traditional MOV devices are typically composed of a zinc oxide ceramic substrate, with electrode structures formed on both sides of the substrate using a silver-plating process. The nonlinear volt-ampere characteristic between the two electrodes achieves single-path overvoltage clamping. However, with the development of electronic devices towards high-density integration, multi-functional protection, and intelligence, traditional MOV devices have gradually revealed the following significant shortcomings in structural design and application:

[0003] With the development of intelligence and miniaturization, the original circuit board design can no longer meet the current technical and space requirements. In the protection of lightning protection level 2 or 3 or weak current circuits, the original individual product settings result in large space occupation, high cost, complicated installation and wiring, and many uncontrollable factors.

[0004] Furthermore, the electrode structure of existing varistor (MOV) is usually two-sided. The front and back sides of each MOV substrate are covered with silver as solderable electrodes. Each MOV can only solve the voltage limiting function of one electrode. It cannot simultaneously solve the protection against lightning strikes and overvoltages on both positive and negative DC poles, the voltage limiting problem between the two live wires and the neutral wire to ground, or the problem between the live wire and the neutral wire (relative to ground, the voltage limiting problem between phases).

[0005] To address the aforementioned issues, the industry has attempted to improve the performance of individual devices by optimizing MOV material formulations or improving heat dissipation structures. However, due to the inherent limitations of traditional dual-electrode structures, integrated protection against multi-path overvoltages by a single MOV device has yet to be achieved. Utility Model Content

[0006] The present invention provides a multi-electrode MOV device structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A multi-electrode MOV device structure includes an MOV substrate body, wherein the MOV substrate body has a first surface and a second surface on its front and back respectively, and the first surface or the second surface has an integrally formed first electrode or at least two mutually isolated second electrodes, and an insulating gap with a predetermined voltage isolation distance is provided between the second electrodes.

[0009] Preferably, when the first surface is an integrally formed first electrode, the second surface is at least two mutually isolated second electrodes.

[0010] Preferably, when the first surface is at least two mutually isolated second electrodes, the second surface is also at least two mutually isolated second electrodes.

[0011] Preferably, the second electrode is arranged radially or in a matrix.

[0012] Preferably, the MOV substrate body, the first electrode, and the second electrode can be of any shape.

[0013] Preferably, the width of the insulation gap is positively correlated with the breakdown voltage of the MOV substrate.

[0014] Beneficial effects

[0015] The above-mentioned technical solutions in the multi-electrode MOV device structure provided by this utility model embodiment have at least one of the following technical effects:

[0016] This invention achieves multi-electrode connection by providing at least two mutually isolated second electrodes:

[0017] 1. This product will 100% solve the problem of surge protector combustion, effectively ensuring that the internal disconnector of the surge protector can disconnect from the power grid in a timely manner when the surge protector ages. 2. It eliminates the need for external disconnectors to prevent fires, significantly reducing material, manpower, and resource costs, lowering project investment costs, and minimizing the use of existing social resources, allowing surge protectors to quickly become the overvoltage protection umbrella for all electrical appliances. 3. Reducing the number of external disconnectors lowers the UP value of the secondary circuit. 4. The surge protector has a faster tripping response. 5. While maintaining the original appearance of the surge protector, the internal structure has been modified and innovated, satisfying the commonality of the original surge protector base while ensuring the product meets national standards. 6. It effectively reduces space occupation and cost, and is simple and convenient to install. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first surface structure of the MOV substrate body of this utility model;

[0019] Figure 2 This is a schematic diagram of the second surface structure of the MOV substrate body of this utility model.

[0020] The correspondence between the labels and component names in the attached figures is as follows:

[0021] 1. MOV substrate body; 2. First surface; 3. Second surface; 4. First electrode; 5. Second electrode; 6. Insulation gap. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments.

[0026] like Figure 1-2 As shown, it is a structural schematic diagram of a multi-electrode MOV device structure according to a preferred embodiment of the present invention.

[0027] In this embodiment, an MOV substrate body 1 is included. The MOV substrate body 1 has a first surface 2 and a second surface 3 on its front and back, respectively. The first surface 2 or the second surface 3 has an integrally formed first electrode 4 or at least two mutually isolated second electrodes 5. An insulating gap 6 with a predetermined voltage isolation distance is provided between the second electrodes 5. The spacing of the insulating gap 6 is configured according to the withstand voltage requirements of the target product to ensure that no arc discharge and current crosstalk occur between adjacent second electrodes 5. The first electrode 4 and the second electrode 5 are then welded together and encapsulated or potted for later use.

[0028] In this embodiment, when the first surface 2 is an integrally formed first electrode 4, the second surface 3 consists of at least two mutually isolated second electrodes 5, making the second surface 3 a multi-electrode structure.

[0029] In this embodiment, when the first surface 2 consists of at least two mutually isolated second electrodes 5, the second surface 3 also consists of at least two mutually isolated second electrodes 5. This makes both the first surface 2 and the second surface 3 multi-electrode structures.

[0030] In this embodiment, the second electrode 5 is arranged radially or in a matrix.

[0031] In this embodiment, the MOV substrate body 1, the first electrode 4, and the second electrode 5 can be of any shape. The shape can be customized according to the actual usage of the surge protector.

[0032] In this embodiment, the width of the insulating gap 6 is positively correlated with the breakdown voltage of the MOV substrate 1. For example, the width of the insulating gap 6 increases when the breakdown voltage is higher.

[0033] The multi-electrode MOV device structure of this utility model has common mechanical installation, connection or setting methods, and can be implemented as long as it can achieve its beneficial effect.

[0034] All technologies not described in detail in this utility model are known technologies. Those skilled in the art can easily implement this utility model based on their understanding of this specification, and the contents shown in the accompanying drawings are part of this specification.

[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A multi-electrode MOV device structure, characterized in that: The MOV substrate body (1) is provided with a first surface (2) and a second surface (3) on the front and back respectively. The first surface (2) or the second surface (3) is provided with an integrally formed first electrode (4) or at least two mutually isolated second electrodes (5). An insulating gap (6) with a predetermined voltage isolation distance is provided between the second electrodes (5).

2. The multi-electrode MOV device structure according to claim 1, characterized in that: When the first surface (2) is an integrally formed first electrode (4), the second surface (3) is at least two mutually isolated second electrodes (5).

3. The multi-electrode MOV device structure according to claim 1, characterized in that: When the first surface (2) is at least two mutually isolated second electrodes (5), the second surface (3) is also at least two mutually isolated second electrodes (5).

4. The multi-electrode MOV device structure according to claim 1, characterized in that: The second electrode (5) is arranged radially or in a matrix.

5. The multi-electrode MOV device structure according to claim 1, characterized in that: The MOV substrate body (1), the first electrode (4), and the second electrode (5) can be of any shape.

6. The multi-electrode MOV device structure according to claim 1, characterized in that: The width of the insulating gap (6) is positively correlated with the breakdown voltage of the MOV substrate body (1).

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