Vacuum-sealed high-capacity direct-current relay ceramic shell

Abstract

The utility model discloses a vacuum-sealed high-capacity direct-current relay ceramic shell, which comprises a shell body, a ceramic shell body, a sealing ring and a sealing ring, the shell body is internally provided with a cavity, and the bottom of the shell body is an open end; the exhaust pipe is arranged at the top of the shell, and the exhaust pipe penetrates through the shell and extends into the shell; the number of the electrode bodies is two, and the electrode bodies are symmetrically arranged relative to the vertical center face of the shell; the kovar alloy cover plate is arranged at the opening in the bottom of the shell; the protection assembly is arranged on the outer side of the shell, the protection assembly is used for preventing external mechanical impact and electrical impact, in the using process of the relay, the protection assembly can protect the shell in an all-around mode, the external mechanical impact and the electrical impact are prevented, meanwhile, the heat dissipation and heat insulation effects are achieved, the working temperature of the shell is reduced, and the service life of the relay is prolonged. And the shell is made of a silicon nitride ceramic material, so that the shell has high strength, high voltage resistance, high insulation, high heat resistance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a vacuum-sealed large-capacity direct current relay ceramic shell. Background Art

[0002] Relay is a commonly used electrical control device. It is actually an automatic switch that uses a small current to control the operation of a large current. Therefore, the relay plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. The relay housings on existing electronic and electrical appliances are all made of high-polyester plastics. The main material is a polymer organic material, which is subject to certain restrictions on high temperature, high pressure, and high strength. It is easy to age over a long period of time, which cannot meet the needs of existing high-tech products. There are a large number of harmful substances, and the corrosion resistance is poor. It is impossible to achieve the electrical connection between the battery and the engine for hybrid vehicles and electric vehicles. It is different from ordinary relays and requires the ability to accurately control the large current that drives the car. At the same time, in order to prevent drivers from being electrocuted due to accidents, it is also necessary to have the function of instantly cutting off the strong current. Using ceramic vacuum seals to extinguish arcs is currently the most ideal way, but the current vacuum-sealed large-capacity DC relay ceramic housing has poor corrosion resistance, low component connection strength, and short service life.

[0003] To this end, we propose a vacuum-sealed large-capacity DC relay ceramic housing. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum-sealed large-capacity DC relay ceramic housing to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions: a vacuum-sealed large-capacity DC relay ceramic housing, comprising:

[0005] A shell body, wherein a cavity is provided in the shell body, and the bottom of the shell body is an open end;

[0006] An exhaust pipe, the exhaust pipe is arranged on the top of the shell, and the exhaust pipe passes through the shell and extends to the inside of the shell;

[0007] Electrode bodies, there are two groups of electrode bodies, and the electrode bodies are symmetrically arranged with respect to the vertical center plane of the shell;

[0008] A Kovar alloy cover plate, wherein the Kovar alloy cover plate is arranged at the bottom opening of the shell;

[0009] A protection component is arranged outside the shell and is used to prevent external mechanical shock and electrical shock.

[0010] Preferably, the protection component also includes a protection shell, the protection shell cover is arranged on the outside of the shell, the bottom of the protection shell is an open end, and the protection shell and the shell are both fixedly connected to the Kovar alloy cover plate.

[0011] Preferably, the shell and the Kovar alloy cover plate form a vacuum cavity one, the protective shell and the Kovar alloy cover plate form a vacuum cavity two, and an exhaust pipe two is provided on the top of the protective shell, and the exhaust pipe two extends into the protective shell.

[0012] Preferably, the protective shell and the shell are in the shape of circular grooves, and the distance between the top of the shell and the protective shell is 1 cm to 1.5 cm.

[0013] Preferably, the outer wall of the protective shell is provided with heat dissipation fins, and the heat dissipation fins are arranged in a circular array on the outer side of the protective shell.

[0014] The utility model has at least the following beneficial effects: during the use of the relay, the protection component can comprehensively protect the housing to prevent external mechanical shock and electrical shock, and also plays a role in heat dissipation and heat insulation, thereby reducing the operating temperature of the housing and extending the service life of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the protective shell structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the shell of the utility model.

[0019] In the figure: 1. Shell; 11. Exhaust pipe; 12. Electrode body; 13. Kovar alloy cover plate; 2. Protection assembly; 21. Protection shell; 31. Vacuum chamber 1; 32. Vacuum chamber 2; 33. Exhaust pipe 2; 41. Heat sink fins. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides a technical solution: a vacuum-sealed large-capacity DC relay ceramic housing, comprising:

[0022] A housing 1, wherein a cavity is provided in the housing 1, and the bottom of the housing 1 is an open end. The housing 1 is made of silicon nitride ceramic material, and has the characteristics of high strength, high pressure resistance, high insulation, high heat resistance, etc., and can work in a high temperature, high pressure, and high strength environment. It also has good corrosion resistance and reliable sealing, and can effectively prevent gas leakage inside the relay and external gas intrusion, thereby ensuring the vacuum degree and performance of the relay;

[0023] An exhaust pipe 11, which is arranged at the top of the housing 1, and passes through the housing 1 and extends to the inside of the housing 1. The exhaust pipe 1 is an auxiliary component of a vacuum-sealed large-capacity DC relay, and is used to extract the gas inside the ceramic housing during the relay manufacturing process to form a vacuum environment, and is also used to exhaust the gas generated inside the relay during the use of the relay to maintain a vacuum environment;

[0024] The electrode body 12 has two groups, and the electrode body 12 is symmetrically arranged with respect to the vertical center plane of the shell 1. The electrode body 12 is fixedly connected to the shell 1 by ultrasonic welding to form a vacuum-sealed structure. The material of the electrode body 12 is copper or copper alloy, etc., which has the characteristics of high conductivity, high heat resistance, high wear resistance, etc., and can work under high current and high voltage conditions, and also has good weldability and machinability;

[0025] A Kovar alloy cover plate 13, which is arranged at the bottom opening of the housing 1. The Kovar alloy cover plate 13 is a protective component of a vacuum-sealed large-capacity DC relay. The Kovar alloy cover plate 13 is connected to the housing 1 by metallization brazing or ultrasonic welding to form a vacuum-sealed structure. The material of the Kovar alloy cover plate 13 is generally Kovar alloy, which has the characteristics of high strength, high pressure resistance, high heat resistance, high corrosion resistance, etc., and can work under high temperature, high pressure, and high strength environment. It also has good weldability and machinability, and can form a firm connection with the housing 1. The function of the Kovar alloy cover plate 13 is to protect the housing 1 and the electrode body 12, prevent external mechanical shock and electrical shock, and also play a role in heat dissipation and heat insulation, reduce the working temperature of the ceramic housing, and extend the service life of the ceramic housing;

[0026] A protection component 2 is arranged on the outside of the housing 1. The protection component 2 is used to prevent external mechanical shock and electrical shock. During the use of the relay, the protection component 2 can fully protect the housing 1 to prevent external mechanical shock and electrical shock. It also plays a role in heat dissipation and heat insulation, reduces the operating temperature of the housing 1, and prolongs the service life of the housing 1.

[0027] The protection component 2 also includes a protection shell 21, which is covered on the outside of the shell 1. The bottom of the protection shell 21 is an open end. The protection shell 21 and the shell 1 are fixedly connected to the Kovar alloy cover plate 13. The protection shell 21 is covered on the outside of the shell 1, so as to cooperate with the Kovar alloy cover plate 13 to form a closed space, and can protect the shell 1 in all directions to prevent damage to the internal shell 1 caused by mechanical and electrical shocks.

[0028] The shell 1 and the Kovar alloy cover plate 13 form a vacuum cavity 1 31, and the protective shell 21 and the Kovar alloy cover plate 13 form a vacuum cavity 2 32. An exhaust pipe 2 33 is provided on the top of the protective shell 21. The exhaust pipe 2 33 extends into the protective shell 21. Through the double-layer vacuum cavity, when the vacuum cavity 1 31 fails and leaks, the vacuum cavity 2 32 can still complete the arc extinguishing work, and the vacuum cavity 2 32 can also block high-temperature external radiation, so that the pressure on the vacuum cavity 1 31 is greatly reduced.

[0029] The protective shell 21 and the shell 1 are in the shape of circular grooves, and the distance between the top of the shell 1 and the protective shell 21 is 1 cm to 1.5 cm. By setting a distance between the top of the shell 1 and the protective shell 21, the top of the shell 1 can be protected and high-temperature external radiation can be blocked.

[0030] The outer wall of the protective shell 21 is provided with heat dissipation fins 41 , and the heat dissipation fins 41 are arranged in a circular array outside the protective shell 21 . By arranging the heat dissipation fins 41 in an array on the outer wall of the protective shell 21 , the heat dissipation effect of the protective shell 21 is effectively increased.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum-sealed large-capacity DC relay ceramic housing, characterized in that: include: A shell (1), wherein a cavity is provided in the shell (1), and the bottom of the shell (1) is an open end; An exhaust pipe (11), the exhaust pipe (11) being arranged on the top of the shell (1), and the exhaust pipe (11) penetrating the shell (1) and extending into the interior of the shell (1); Electrode bodies (12), there are two groups of electrode bodies (12), and the electrode bodies (12) are symmetrically arranged with respect to the vertical center plane of the shell (1); A Kovar alloy cover plate (13), wherein the Kovar alloy cover plate (13) is arranged at the bottom opening of the housing (1); A protection component (2) is arranged outside the housing (1), and is used to prevent external mechanical shock and electrical shock.

2. A vacuum-sealed large-capacity DC relay ceramic housing according to claim 1, characterized in that: The protection component (2) further comprises a protection shell (21), wherein the protection shell (21) is arranged on the outside of the shell (1), the bottom of the protection shell (21) is an open end, and the protection shell (21) and the shell (1) are both fixedly connected to the Kovar alloy cover plate (13).

3. A vacuum-sealed large-capacity DC relay ceramic housing according to claim 2, characterized in that: The shell (1) and the Kovar alloy cover plate (13) form a vacuum cavity one (31), the protective shell (21) and the Kovar alloy cover plate (13) form a vacuum cavity two (32), and an exhaust pipe two (33) is arranged on the top of the protective shell (21), and the exhaust pipe two (33) extends into the protective shell (21).

4. A vacuum-sealed large-capacity DC relay ceramic housing according to claim 3, characterized in that: The protective shell (21) and the shell (1) are in the shape of circular grooves, and the distance between the top of the shell (1) and the protective shell (21) is 1 cm to 1.5 cm.

5. A vacuum-sealed large-capacity DC relay ceramic housing according to claim 4, characterized in that: The outer wall of the protective shell (21) is provided with heat dissipation fins (41), and the heat dissipation fins (41) are arranged in a circular array on the outside of the protective shell (21).

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