High-voltage direct-current relay

Abstract

The utility model belongs to the technical field of relays, and particularly relates to a high-voltage direct-current relay, which comprises a shell comprising a base and an upper cover, and the upper cover is mounted on the base; the two auxiliary loop static contacts are arranged on the upper cover; the auxiliary connecting piece comprises a fixing part and two contact bridge parts, the fixing part can be movably installed in the upper cover in the Z direction, and the two contact bridge parts are connected to the fixing part; the two auxiliary loop movable contacts are respectively arranged on the two contact bridge parts; the electromagnetic control module is mounted on the base; a bending protruding block is arranged on the inner side of the upper cover. The beneficial effects of the utility model are that through the arrangement of the auxiliary connecting piece, the high-voltage DC relay can provide an auxiliary normally-closed control loop on the basis of providing a normally-open control main loop, thereby achieving the integration of multiple functions; and the miniaturization arrangement of the auxiliary connecting piece can meet the space requirement of the ceramic upper cover, so that the high-voltage direct-current relay can be manufactured through a ceramic packaging technology.

Description

TECHNICAL FIELD

[0001] The utility model belongs to relay technology field especially, it relates to a kind of high-voltage direct-current relay. BACKGROUND

[0002] High-voltage direct-current relay is a kind of switch device specially designed for high-voltage, large-current direct-current circuit, and is widely used in electric vehicles, renewable energy systems, energy storage devices, charging facilities and industrial power control fields.The core function is to safely and reliably turn on or turn off the direct-current circuit, especially in high-voltage environment, it needs to have excellent arc resistance, insulation performance and long-term stability.

[0003] At present, high-voltage direct-current relay usually adopts moving spring piece direct-acting structure, which includes two static contacts and a moving assembly inside, the moving assembly includes a moving spring part and a push rod assembly, the moving spring part is composed of a moving spring piece and moving contacts at both ends of the moving spring piece, the moving spring piece is direct-acting, when the moving contacts at both ends of the moving spring piece are in contact with the two static contacts respectively, the current flows in from one of the static contacts, and then flows out from the other static contact after passing through the moving spring piece, thereby achieving the effect of controlling the connection of the load circuit.

[0004] In the prior art, some high-voltage direct-current relays also have normally closed auxiliary contacts inside, and an auxiliary moving spring piece is arranged in the push rod assembly, when the push rod assembly is not actuated (reset state), the main moving spring piece is separated from the main static contact, and the auxiliary moving spring piece is connected between the two normally closed auxiliary contact lead-out ends, when the push rod assembly is actuated, the main moving spring piece is in contact with the main static contact, and the auxiliary moving spring piece is separated from the two normally closed auxiliary contact lead-out ends, thereby achieving the effect of normally closed auxiliary control, which is used to meet the needs of some complex circuit systems that require long-term closed circuits, such as energy storage, charging equipment and some occasions that require long-term charging and discharging.

[0005] Since the high-voltage direct-current relay is usually a sealed cavity structure inside, and the high-voltage direct-current relay with normally closed auxiliary control function in the prior art has the drawbacks of complex structure and large size (occupying a large space in the height direction of the relay), which can easily lead to the difficulty of manufacturing (high process difficulty). UTILITY MODEL CONTENTS

[0006] The utility model aims at the above-mentioned technical problems, and provides a high-voltage direct-current relay to solve the above-mentioned technical problems.

[0007] Therefore, the utility model provides a high-voltage direct-current relay, which comprises:

[0008] A shell is provided with a sealed cavity inside;

[0009] Two auxiliary circuit stationary contacts are mounted on the top cover for connecting to external circuits;

[0010] The auxiliary connector includes a fixing part and two contact bridge parts. The fixing part is movable in the Z direction and is installed inside the upper cover. The two contact bridge parts are connected to the fixing part.

[0011] Two auxiliary circuit moving contacts are respectively installed on two contact bridge parts for corresponding contact connection with the auxiliary circuit stationary contacts;

[0012] The electromagnetic control module is mounted on the base and is used to drive the fixed part to move along the Z direction.

[0013] The upper cover has a bending protrusion on its inner side. When the fixing part moves upward along Z, the bending protrusion contacts the bending contact bridge part along Z, causing the auxiliary circuit moving contact module and the auxiliary circuit stationary contact module to separate. When the fixing part moves downward along Z, the contact bridge part returns to its original state, causing the auxiliary circuit moving contact and the auxiliary circuit stationary contact to come into contact.

[0014] Furthermore, a C-shaped elastic connection is provided between the fixing part and the contact bridge part;

[0015] The fixing part is located below the contact bridge part.

[0016] Furthermore, the auxiliary connector also includes an arc-shaped connecting portion, which is disposed between the elastic connecting portion and the contact bridge portion.

[0017] Furthermore, the housing includes:

[0018] The electromagnetic control module is mounted on the base.

[0019] The top cover is placed on the base to form a sealed cavity.

[0020] Furthermore, the electromagnetic control module includes:

[0021] A moving iron core assembly is movably mounted on a base along the Z-direction, and a fixing part is installed on the moving iron core assembly;

[0022] An energized coil, installed inside the base, is used to drive the moving iron core assembly to move along the Z-axis.

[0023] Furthermore, the electromagnetic control module also includes:

[0024] The reaction spring is axially abutted between the moving iron core assembly and the top of the base.

[0025] The beneficial effects of this utility model are:

[0026] 1. By setting the auxiliary connector, this utility model enables the high-voltage DC relay to provide an auxiliary normally closed control circuit in addition to the normally open control main circuit, thus realizing the multi-functional integration of the high-voltage DC relay. It can meet the application requirements of some energy storage mechanisms that need to be energized for a long time for charging and discharging, such as automobile batteries or charging piles, and has high practicality.

[0027] 2. The miniaturized design of this auxiliary connector can meet the space requirements of the sealed cavity, simplify the normally closed auxiliary contacts of the high-voltage DC relay, make the normally closed auxiliary control structure simpler, the processing technology simpler, the manufacturing cost lower, and also make the high-voltage DC relay occupy less space, which can meet the application in electric vehicles and other scenarios where the installation and use space is limited.

[0028] 3. By setting an integrated arc-shaped connecting part, the bending stress on the contact bridge part when it is bent can be effectively reduced, which facilitates the recovery of the contact bridge part after bending and prevents the contact bridge part from deforming due to excessive bending stress. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a partial structural schematic diagram of the present invention;

[0031] Figure 3 This is a structural cross-sectional view of the present invention;

[0032] Figure 4 This is a structural cross-sectional view of the present invention from another perspective;

[0033] Figure 5 This is a structural schematic diagram of the auxiliary connector of this utility model;

[0034] Figure 6 This is a schematic diagram of another embodiment of the auxiliary connector of this utility model;

[0035] Figure 7 This is a schematic diagram of another installation structure for the auxiliary connector of this utility model;

[0036] The markings in the diagram are as follows:

[0037] 1. Housing; 11. Base; 12. Top cover; 13. Sealed cavity; 2. Main circuit moving contact; 3. Main circuit stationary contact; 4. Auxiliary circuit stationary contact; 5. Bending protrusion; 6. Auxiliary connector; 61. Fixing part; 62. Contact bridge part; 63. Elastic connection structure; 64. Arc-shaped connection part; 7. Auxiliary circuit moving contact; 8. Electromagnetic control module; 81. Moving iron core assembly; 82. Energized coil; 83. Reaction spring. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] Example 1:

[0041] This embodiment provides a high-voltage DC relay, including:

[0042] The housing 1 includes a base 11 and a top cover 12, with the top cover 12 mounted on the base 11;

[0043] Two auxiliary circuit stationary contacts 4 are mounted on the upper cover 12 for connecting external circuits;

[0044] The auxiliary connector 6 includes a fixing part 61 and two contact bridge parts 62. The fixing part 61 is movable along the Z direction and is installed inside the upper cover 12. The two contact bridge parts 62 are connected to the fixing part 61.

[0045] Two auxiliary circuit moving contacts 7 are respectively installed on two contact bridge parts 62 for corresponding contact connection with the auxiliary circuit stationary contacts 4;

[0046] Electromagnetic control module 8, which is mounted on base 11, is used to drive the fixed part 61 to move along the Z direction;

[0047] The upper cover 12 has a bending protrusion 5 on its inner side. When the fixing part 61 moves upward along Z, the bending protrusion 5 contacts the bending contact bridge part 62 along Z, causing the auxiliary circuit moving contact 7 module and the auxiliary circuit stationary contact 4 module to separate. When the fixing part 61 moves downward along Z, the contact bridge part 62 returns to its original state, causing the auxiliary circuit moving contact 7 and the auxiliary circuit stationary contact 4 to come into contact.

[0048] Furthermore, the housing includes:

[0049] The electromagnetic control module is mounted on the base.

[0050] The top cover is placed on the base to form a sealed cavity.

[0051] In this technical solution, the housing 1 of the high-voltage DC relay consists of a base 11 and a top cover 12. The top cover is mounted on the base and is sealed to the base. A sealing chamber is formed inside the top cover, and an inert gas is injected into the sealing chamber to effectively prevent arcing and burning when the moving and stationary contacts come into contact. The high-voltage DC relay is equipped with a normally open control main circuit and a normally closed control auxiliary circuit, which can be used to control the opening and closing of different external circuit structures. The normally open control main circuit of the high-voltage DC relay is the prior art disclosed. Two main circuit moving contacts 2 are provided on the output terminal of the electromagnetic control module 8, and two main circuit stationary contacts 3 are provided on the top cover 12. When the electromagnetic control module 8 is energized, the output terminal of the electromagnetic control module 8 moves upward along the Z direction, so that the main circuit moving contacts 2 and the main circuit stationary contacts 3 come into contact, realizing circuit connection; conversely, when the electromagnetic control module 8 is de-energized, the main circuit is controlled to be in a normally open state.

[0052] The normally closed control auxiliary circuit of the high-voltage DC relay consists of auxiliary connector 6, auxiliary circuit moving contact 7, and auxiliary circuit stationary contact 4, such as... Figure 5 As shown, the auxiliary connector 6 consists of a fixing part 61 and a contact bridge part 62, both of which are made of elastic metal. Furthermore, a C-shaped elastic connecting part 63 is provided between the fixing part 61 and the contact bridge part 62, with the fixing part 61 located below the contact bridge part 62. This structural design allows the end of the contact bridge part 62 to swing along the Z-direction under the action of an external force.

[0053] When the electromagnetic control module 8 is in a de-energized state, the contact bridge 62 is in a normal state. The two auxiliary circuit moving contacts 7 installed on the contact bridge 62 are in contact with the two auxiliary circuit stationary contacts 4 installed on the upper cover 12, so that the external circuit remains connected.

[0054] When the electromagnetic control module 8 is powered on, the electromagnetic control module 8 drives the auxiliary connector 6 to approach the upper cover 12 along the Z direction. The bending protrusion 5 on the inner side of the upper cover 12 abuts against the contact bridge 62. As the auxiliary connector 6 moves, the bending protrusion 5 squeezes the contact bridge 62, causing the end of the contact bridge 62 to bend downward along the Z direction, so that the auxiliary circuit moving contact 7 and the auxiliary circuit stationary contact 4 are separated, thereby realizing the disconnection of the circuit.

[0055] In addition, such as Figure 5 , Figure 6 As shown, the two contact bridge portions 62 of the auxiliary connector 6 can be arranged facing opposite sides or facing the same side, simply by adapting the layout of the two auxiliary circuit stationary contacts 4 mounted on the upper cover 12. It is also worth mentioning that when the two contact bridge portions 62 of the auxiliary connector 6 are arranged facing opposite sides, the auxiliary connector 6 can also be tilted inside the upper cover 12 according to the layout of the two auxiliary circuit stationary contacts 4 on the upper cover 12, such as... Figure 7 As shown.

[0056] Furthermore, the top cover 12 is made of ceramic. Due to the miniaturized structural design of the auxiliary connector 6, the high-voltage DC relay can be made using ceramic encapsulation technology. This achieves airtight encapsulation while having the advantages of small footprint and simple structure. Compared with the high-precision processing equipment required for glass encapsulation technology, it reduces the types of processes and equipment, ensuring insulation while facilitating production and processing, reducing production costs, and resulting in high economic benefits.

[0057] It is worth noting that glass encapsulation technology is an existing technology. It is a technique that uses glass materials to seal and protect sensitive components, electronic devices, optical components, or biomedical equipment. Through physical or chemical methods, glass is bonded to the encapsulated object to form a protective layer that isolates it from the external environment (such as moisture, oxygen, corrosive substances, etc.). It features high sealing performance, high temperature resistance, chemical corrosion resistance, optical transparency, and electrical insulation. However, it faces technical challenges such as stress matching and microcrack control, and the materials used are typically borosilicate glass, quartz glass, and specialty glasses, resulting in high costs.

[0058] Through the above structural design, by setting the auxiliary connector 6, the high-voltage DC relay can provide an auxiliary normally closed control circuit in addition to providing a normally open control main circuit. This realizes the multi-functional integration of the high-voltage DC relay and can meet the application requirements of energy storage mechanisms that need to be energized for charging and discharging for a long time, such as automobile batteries or charging piles. It is highly practical. At the same time, the miniaturized setting of the auxiliary connector 6 can meet the space requirements of the sealed cavity, thereby simplifying the normally closed auxiliary contact of the high-voltage DC relay.

[0059] Example 2:

[0060] This embodiment provides a high-voltage DC relay, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0061] Furthermore, the auxiliary connector 6 also includes an arc-shaped connecting portion 64, which is disposed between the elastic connecting portion 63 and the contact bridge portion 62.

[0062] In this technical solution, by setting an integral arc-shaped connecting part 64, the bending stress on the contact bridge part 62 when it is bent can be effectively reduced, which facilitates the recovery of the contact bridge part 62 after bending and prevents the contact bridge part 62 from deforming due to excessive bending stress.

[0063] Example 3:

[0064] This embodiment provides a high-voltage DC relay, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0065] Furthermore, the fixing part 61 has a "well" shaped structure. This structural design reduces the material input of the fixing part 61, achieving a lightweight design and reducing production costs. At the same time, the "well" shaped grid structure can evenly distribute the load, resist bending moments in different directions, effectively improve the structural strength of the fixing part 61, and prevent deformation and breakage.

[0066] Example 4:

[0067] This embodiment provides a high-voltage DC relay, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] Furthermore, the electromagnetic control module 8 includes:

[0069] The moving iron core assembly 81 is movably mounted on the base 11 along the Z direction, and the fixing part 61 is mounted on the moving iron core assembly 81.

[0070] An energized coil 82 is installed inside the base 11 and is used to drive the moving iron core assembly 81 to move along the Z direction.

[0071] In this technical solution, the energized coil 82 generates magnetic force after being energized, which drives the moving iron core assembly 81 to move along the Z direction, so that the main circuit moving contact 2 and the auxiliary connecting piece 6 on the moving iron core assembly 81 move along the Z direction, thereby realizing the closing of the control main circuit and the opening of the control auxiliary circuit.

[0072] Furthermore, the electromagnetic control module 8 also includes:

[0073] The reaction spring 83 is axially abutted between the moving iron core assembly 81 and the top of the base 11.

[0074] With this structural design, when the energized coil 82 is de-energized, the reaction spring 83 will push the moving iron core assembly 81 back to its original position due to the elastic force generated by compression, thus achieving rapid reset.

[0075] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high-voltage DC relay, characterized in that, include: A housing (1) having a sealed cavity (13) inside; Two auxiliary circuit stationary contacts (4) are mounted on the upper cover (12) for connecting external circuits; An auxiliary connector (6) includes a fixing part (61) and two contact bridge parts (62). The fixing part (61) is movable along the Z direction and installed inside the upper cover (12). The two contact bridge parts (62) are connected to the fixing part (61). Two auxiliary circuit moving contacts (7) are respectively installed on two contact bridges (62) for corresponding contact connection with the auxiliary circuit stationary contacts (4); An electromagnetic control module (8) is mounted on the housing (1) and is used to drive the fixing part (61) to move along the Z direction; The upper cover (12) is provided with a bending protrusion (5) on its inner side. When the fixing part (61) moves upward along Z, the bending protrusion (5) contacts the bending contact bridge part (62) along Z, causing the auxiliary circuit moving contact (7) module and the auxiliary circuit stationary contact (4) module to separate. When the fixing part (61) moves downward along Z, the contact bridge part (62) returns to its original state, causing the auxiliary circuit moving contact (7) and the auxiliary circuit stationary contact (4) to come into contact.

2. A high-voltage DC relay according to claim 1, characterized in that, An elastic connecting part (63) is provided between the fixing part (61) and the contact bridge part (62); The fixing part (61) is located below the contact bridge part (62).

3. A high-voltage DC relay according to claim 1, characterized in that, The housing includes: The electromagnetic control module (8) is mounted on the base (11); The upper cover (12) is placed on the base (11) and forms the sealed cavity (13).

4. A high-voltage DC relay according to claim 3, characterized in that, The electromagnetic control module (8) includes: A moving iron core assembly (81) is movably disposed in the base (11) along the Z direction, and the fixing part (61) is mounted on the moving iron core assembly (81). An energized coil (82) is installed inside a base (11) and is used to drive the moving iron core assembly (81) to move along the Z direction.

5. A high-voltage DC relay according to claim 4, characterized in that, The electromagnetic control module (8) also includes: A reaction spring (83) is axially abutted between the moving iron core assembly (81) and the top of the base (11).

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