High-voltage direct-current relay and control method thereof

Abstract

The invention belongs to the technical field of relays, and particularly relates to a high-voltage direct-current relay and a control method thereof.The high-voltage direct-current relay comprises a shell, an insulating cover, a contact binding post, a main loop moving contact, an auxiliary loop static contact and an auxiliary loop moving contact; an insulating cover is arranged in the shell, a mounting cavity is formed in the insulating cover, and two contact binding posts extending into the mounting cavity and two auxiliary loop static contacts are arranged in the insulating cover; the main loop moving contact is driven by the driving mechanism and moves in the mounting cavity to be connected with and disconnected from the contact binding post; the auxiliary loop moving contact is arranged in the insulating cover through an elastic sheet, is positioned at the output end of the driving mechanism and is linked with the main loop moving contact; the inner wall of the insulating cover is provided with a bump, and when the main loop is conducted, the elastic sheet is bent by the bump, so that the auxiliary loop is disconnected; when the main loop is disconnected, the elastic sheet resets, and the auxiliary loop is conducted; according to the structure, the design is simplified through cooperation of the elastic sheet and the protruding block, connection and disconnection of an auxiliary loop are achieved through linkage, occupied space is reduced, and manufacturing difficulty is lowered.

Description

Technical Field

[0001] The present invention belongs to the technical field of relays, and in particular relates to a high-voltage direct current relay and a control method thereof. Background Art

[0002] High-voltage DC relays are key electrical components designed for high-voltage, high-current circuits. They play an important role in electric vehicles, renewable energy systems, energy storage equipment, charging facilities, and industrial power control.

[0003] In some existing high-voltage DC relays, normally closed auxiliary contacts are set inside. When the main circuit is turned on, the auxiliary contacts are disconnected, thereby achieving the function of normally closed auxiliary control. This is used to meet the needs of some complex circuit systems where circuits need to remain closed for a long time, such as energy storage, charging equipment and other occasions that require long-term charging and discharging. However, the normally closed auxiliary contacts in high-voltage DC relays with normally closed auxiliary contacts have a complex structure and occupy a large space in the high-voltage DC relay, which easily leads to a difficult manufacturing process. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned technical problems and provide a high-voltage DC relay and a control method thereof, thereby simplifying the structure of the normally closed auxiliary contacts, reducing the occupied space in the high-voltage DC relay, and reducing the difficulty of the manufacturing process.

[0005] In view of this, the present invention provides a high-voltage DC relay, comprising: The housing has an insulating cover disposed therein and a mounting cavity formed in the insulating cover; Two contact terminals are provided on the insulating cover, and one end of the terminal extends into the mounting cavity; The main circuit moving contact is provided with a driving mechanism movably connected in the installation cavity, and connects the main circuit when in contact with the contact terminal or disconnects the main circuit when the contact is released; Auxiliary circuit static contacts, two of which are provided on the insulating cover, and one end of which extends into the mounting cavity; Auxiliary circuit moving contacts, two of which are provided at the output end of the driving mechanism and are provided with elastic sheets installed in the insulating cover; Among them, a protrusion is provided on the inner wall of the insulating cover, and when the main circuit moving contact is in contact with the contact terminal, the elastic sheet is bent by the protrusion, and the auxiliary circuit moving contact is separated from the auxiliary circuit static contact. When the main circuit moving contact is released from contact with the contact terminal, the elastic sheet is reset, and the auxiliary circuit moving contact is in contact with the auxiliary circuit static contact.

[0006] In the above technical solution, further: The elastic sheet includes a base plate and two contact bridge parts connected to the base plate, and the two auxiliary circuit movable contacts are respectively arranged on the two contact bridge parts and respectively arranged corresponding to the two auxiliary circuit static contacts; The contact bridge is located above the substrate, and the contact bridge is bent by the convex block to disconnect the auxiliary circuit moving contact from the auxiliary circuit static contact or reset the auxiliary circuit moving contact from the auxiliary circuit static contact to make the auxiliary circuit moving contact and the auxiliary circuit static contact conductive.

[0007] In the above technical solution, further: The elastic sheet further includes an elastic connecting portion for connecting the substrate and the contact bridge portion, and the cross section of the elastic connecting portion is in an arc shape; The auxiliary circuit moving contact is located at one end of the contact bridge portion away from the elastic connecting portion.

[0008] In the above technical solution, further: An arc-shaped connecting portion is provided on one side of the contact bridge portion close to the elastic connecting portion.

[0009] In the above technical solution, further: The elastic sheet also includes a supporting portion, and the supporting portion is installed at one end of the contact bridge portion away from the elastic connecting portion and is located below the auxiliary circuit moving contact.

[0010] In the above technical solution, further: The supporting portion is an S-shaped elastic supporting piece.

[0011] In the above technical solution, further: The driving mechanism includes a moving iron core, a connecting seat installed at one end of the moving iron core, and an electromagnetic coil assembly sleeved on the moving iron core, and the main circuit moving contact is installed on the connecting seat; The shell includes a base and a top cover, and the electromagnetic coil assembly is installed in the base, while the contact terminal and the auxiliary circuit static contact both penetrate the top cover and extend to the top cover surface.

[0012] In the above technical solution, further: The connecting base includes a first supporting base, supporting plates arranged on both sides of the first supporting base, and a second supporting base connected to a side of the supporting plate away from the first supporting base; The main circuit moving contact is installed between the first support base and the second support base, and a main contact spring is provided between the main circuit moving contact and the first support base, while the auxiliary circuit moving contact is installed on the second support base.

[0013] In the above technical solution, further: A reverse spring is installed in the base and is sleeved on the moving iron core.

[0014] The present invention provides a control method for a high-voltage DC relay, characterized by comprising the following steps: S1: In the initial state, the main circuit moving contact is separated from the contact terminal, while the auxiliary circuit moving contact and the auxiliary circuit static contact remain in contact and conductive; S2: When the main circuit needs to be turned on, the driving mechanism pushes the main circuit moving contact to move toward the contact terminal, and pushes the contact bridge to move toward the protrusion; S3: When the contact bridge portion contacts the bump, it pushes the contact bridge portion to bend along the elastic connection portion, disconnecting the conduction between the auxiliary circuit movable contact and the auxiliary circuit static contact, and prompting the elastic support sheet to abut against the substrate. The bump also causes the contact bridge portion to bend downward in its middle portion. S4: The moving contact of the main circuit contacts the contact terminal, and the main circuit is turned on.

[0015] The beneficial effects of the present invention are: 1. By adopting the arrangement of elastic sheets and protrusions, the structure is effectively simplified. Specifically, the auxiliary circuit moving contact and the auxiliary circuit static contact are brought into contact and connected by the elastic force of the elastic sheet, and the contact and connection are released by the protrusion abutting the elastic sheet. This can be completed only by moving the auxiliary circuit moving contact. The auxiliary circuit moving contact is arranged at the output end of the driving mechanism so that it is linked with the main circuit moving contact, effectively reducing the occupied space and lowering the difficulty of the manufacturing process.

[0016] 2. By setting the elastic sheet as a substrate and two contact bridge parts, it is not only convenient to install the two contact bridge parts in the chassis through the substrate, but also can improve the accuracy and stability of the installation position of the two contact bridge parts. Moreover, the contact bridge parts are connected through the arc-shaped elastic connecting part and the arc-shaped connecting part, so that when the contact bridge parts are bent, the stress dispersion is effectively guaranteed, thereby extending the service life.

[0017] 3. By arranging a support portion at one end of the contact bridge portion away from the elastic connection portion, the contact bridge portion is bent from the middle portion after the auxiliary circuit moving contact and the auxiliary circuit static contact are separated, thereby preventing the protrusion and the contact bridge portion from slipping and the contact bridge portion from generating a horizontal force, thereby improving the deformation stability of the contact bridge portion, and avoiding the situation where the inclination angle of the contact bridge portion is too large, which causes the protrusion and the surface of the contact bridge portion to slide and the elastic connection portion to generate a horizontal force, making the deformation of the elastic sheet controllable and stable, thereby extending the service life of the elastic sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the interior of the housing of the present invention; Figure 3 It is a schematic structural diagram of the interior of the insulating cover of the present invention; Figure 4 is an internal cross-sectional view of the present invention; Figure 5 It is a schematic structural diagram of the elastic sheet of the present invention; The markings in the figure are as follows: 1. Shell; 100. Base; 101. Top cover; 2. Insulation cover; 3. Mounting cavity; 4. Contact terminal; 5. Main circuit moving contact; 6. Driving mechanism; 60. Moving iron core; 61. Connecting seat; 610. First supporting seat; 611. Support plate; 612. Second supporting seat; 613. Main contact spring; 62. Electromagnetic coil assembly; 7. Auxiliary circuit static contact; 8. Auxiliary circuit moving contact; 9. Elastic sheet; 90. Base plate; 91. Contact bridge part; 92. Elastic connecting part; 93. Arc-shaped connecting part; 94. Support part; 10. Protrusion; 11. Reverse spring. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0020] Example 1: This embodiment provides a high-voltage DC relay, including: The housing 1 has an insulating cover 2 disposed therein, and a mounting cavity 3 is formed in the insulating cover 2; Two contact terminals 4 are provided on the insulating cover 2, and one end of the contact terminals extends into the mounting cavity 3; The main circuit moving contact 5 is provided with a driving mechanism 6 and is movably connected in the mounting cavity 3. It connects the main circuit when in contact with the contact terminal 4 or disconnects the main circuit when the contact is released. Auxiliary circuit static contacts 7, two of which are provided on the insulating cover 2, and one end of which extends into the mounting cavity 3; Auxiliary circuit moving contacts 8 are provided with two at the output end of the driving mechanism 6 and are provided with elastic sheets 9 installed in the insulating cover 2; Among them, a protrusion 10 is provided on the inner wall of the insulating cover 2, and when the main circuit moving contact 5 is in contact with the contact terminal 4, the elastic piece 9 is bent by the protrusion 10, and the auxiliary circuit moving contact 8 is separated from the auxiliary circuit static contact 7. When the main circuit moving contact 5 is disconnected from the contact terminal 4, the elastic piece 9 is reset, and the auxiliary circuit moving contact 8 is in contact with the auxiliary circuit static contact 7. At the same time, the insulating cover 2 can be made of ceramic material, and the bump 10 and the insulating cover 2 can be an integrated structure; The high-voltage DC relay also includes an upper yoke and a lower yoke arranged on the main circuit moving contact 5, a planar yoke installed between the housing 1 and the drive mechanism 6, and other conventional structures of high-voltage DC relays, which are all prior arts and are known to technicians in the relevant technical field from traditional high-voltage DC relays and will not be repeated here.

[0021] It can be seen from the present embodiment that the structure is effectively simplified by adopting the arrangement of the elastic sheet 9 and the protrusion 10. Specifically, the auxiliary circuit moving contact 8 and the auxiliary circuit static contact 7 are brought into contact and conducted by the elastic force of the elastic sheet 9, and the contact and conduction are released by the protrusion 10 abutting against the elastic sheet 9. This can be accomplished simply by moving the auxiliary circuit moving contact 8, and the auxiliary circuit moving contact 8 is arranged at the output end of the driving mechanism 6 so as to be linked with the main circuit moving contact 5, thereby effectively reducing the occupied space and lowering the difficulty of the manufacturing process.

[0022] Example 2: 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: The elastic sheet 9 includes a base plate 90 and two contact bridge portions 91 connected to the base plate 90, and the two auxiliary circuit movable contacts 8 are respectively arranged on the two contact bridge portions 91 and respectively arranged corresponding to the two auxiliary circuit static contacts 7; The contact bridge portion 91 is located above the substrate 90, and the contact bridge portion 91 is bent by the protrusion 10 to disconnect the auxiliary circuit movable contact 8 from the auxiliary circuit static contact 7 or reset the auxiliary circuit movable contact 8 to contact and conduct the auxiliary circuit static contact 7; Meanwhile, the base and the contact bridge portion 91 may adopt an integrated structure, and the contact bridge portion 91 is tilted along the horizontal plane relative to both the length direction and the width direction of the base plate 90 .

[0023] It can be seen from this embodiment that by configuring the elastic sheet 9 as a substrate 90 and two contact bridge portions 91 , not only is it convenient to install the two contact bridge portions 91 in the housing 1 through the substrate 90 , but the accuracy and stability of the installation positions of the two contact bridge portions 91 can also be improved.

[0024] Example 3: 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: The elastic sheet 9 further includes an elastic connecting portion 92 for connecting the substrate 90 and the contact bridge portion 91, and the cross section of the elastic connecting portion 92 is arc-shaped; The auxiliary circuit moving contact 8 is located at one end of the contact bridge portion 91 away from the elastic connection portion 92; At the same time, the substrate 90 , the contact bridge portion 91 and the elastic connection portion 92 may be formed into an integrated structure.

[0025] It can be seen from this embodiment that the substrate 90 and the contact bridge portion 91 are connected by the arc-shaped elastic connecting portion 92, so that when the contact bridge portion 91 is bent, the stress at the connection between it and the substrate 90 is dispersed, making it less likely to break, thereby effectively extending the service life.

[0026] Example 4: 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: An arc-shaped connecting portion 93 is provided on one side of the contact bridge portion 91 close to the elastic connecting portion 92; The arc-shaped connecting portion 93 is integrally formed on the contact bridge portion 91 .

[0027] It can be seen from this embodiment that by setting the arc-shaped connecting portion 93, when the contact bridge portion 91 bends, the arc-shaped connecting portion 93 is deformed first, and then the elastic connecting portion 92 is deformed, which can further ensure stress dispersion during bending and further extend the service life.

[0028] Example 5: 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: The elastic piece 9 further includes a support portion 94 , and the support portion 94 is mounted on one end of the contact bridge portion 91 away from the elastic connection portion 92 and is located below the auxiliary circuit moving contact 8 ; The support portion 94 and the elastic sheet 9 are of an integrated structure and are formed by bending.

[0029] As can be seen from this embodiment, by providing a support portion 94 at the end of the contact bridge portion 91 away from the elastic connection portion 92, the main circuit moving contact 5 continues to move and contact and conduct with the contact terminal 4 after the auxiliary circuit moving contact 8 is separated from the auxiliary circuit static contact 7. This ensures that when the main circuit moving contact 5 is compensated for contact wear, the auxiliary circuit moving contact 8 will not become an obstacle to movement. And after both ends of the contact bridge portion 91 are abutted, due to the setting of the support portion 94, the contact bridge portion 91 is bent from the middle, avoiding the situation that the contact bridge portion 91 has no support portion 94 and the main circuit moving contact 5 compensates for contact wear or the main circuit moving contact 5 continues to move after the auxiliary circuit moving / static contacts are separated. This may easily cause the contact bridge portion 91 to tilt at an excessively large angle and the reset force of the elastic connecting portion 92 to be excessive, thereby causing the elastic connecting portion 92 to have a horizontal force, causing the elastic connecting portion 92 to deform in the horizontal direction and slipping wear between the protrusion 10 and the contact bridge portion 91, thereby further extending the service life of the elastic sheet 9.

[0030] Example 6: 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: The supporting portion 94 is an S-shaped elastic supporting piece.

[0031] It can be seen from the present embodiment that by adopting an S-shaped elastic support sheet, the setting height of the support portion 94 can be increased, so that the support portion 94 can intervene earlier to control the deformation of the contact bridge portion 91, further reducing the possible deformation of the elastic connecting portion 92 in the horizontal direction and the slipping and wear between the protrusion 10 and the contact bridge portion 91, thereby further extending the service life.

[0032] Example 7: 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: The driving mechanism 6 includes a moving iron core 60, a connecting seat 61 installed at one end of the moving iron core 60, and an electromagnetic coil assembly 62 sleeved on the moving iron core 60, and the main circuit moving contact 5 is installed on the connecting seat 61; The housing 1 includes a base 100 and a top cover 101 , and the electromagnetic coil assembly 62 is installed in the base 100 , while the contact terminal 4 and the auxiliary circuit static contact 7 both penetrate the top cover 101 and extend to the surface of the top cover 101 ; At the same time, the specific structure of the electromagnetic coil assembly 62 is an existing mature technology and a conventional configuration of a high-voltage DC relay. Therefore, technicians in the relevant technical field can learn its specific structure from traditional high-voltage DC relays and will not be repeated here.

[0033] It can be seen from the present embodiment that the electromagnetic coil assembly 62 is energized to push the moving iron core 60 to move through electromagnetic induction, thereby facilitating the driving of the main circuit moving contact 5 to ensure the conduction and disconnection of the main circuit, and the shell 1 is configured as a base 100 and a top cover 101 to ensure the protection effect of the internal structure, and the contact terminal 4 and the auxiliary circuit static contact 7 are extended to the surface of the top rod, thereby facilitating wiring from the contact terminal 4 and the auxiliary circuit static contact 7.

[0034] Example 8: 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: The connecting base 61 includes a first supporting base 610, supporting plates 611 provided on both sides of the first supporting base 610, and a second supporting base 612 connected to the side of the supporting plate 611 away from the first supporting base 610; The main circuit moving contact 5 is installed between the first support base 610 and the second support base 612, and a main contact spring 613 is provided between the main circuit moving contact 5 and the first support base 610, while the auxiliary circuit moving contact 8 is installed on the second support base 612; At the same time, the first support base 610 and the second support base 612 are connected to the two support plates 611 by snap-fit ​​connections, and the first support base 610 is connected to the moving iron core 60 by snap-fit ​​connections.

[0035] It can be seen from the present embodiment that the setting of the connecting seat 61 effectively improves the installation stability of the main circuit moving contact 5 and the auxiliary circuit moving contact 8, and the main contact spring 613 makes the main circuit moving contact 5 abut against the second support seat 612, which can facilitate the rapid and close contact and fit of the auxiliary contacts, compensate for wear, stabilize contact pressure, and suppress contact bouncing.

[0036] Example 9: 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: A reverse spring 11 is installed in the base 100 and is sleeved on the moving iron core 60 .

[0037] It can be seen from this embodiment that, by installing the reverse spring 11 , it is convenient to push the main circuit moving contact 5 to quickly reset, thereby ensuring the response effect.

[0038] Example 10: This embodiment provides a control method for a high-voltage DC relay, comprising the following steps: S1: In the initial state, the main circuit moving contact 5 is separated from the contact terminal 4, while the auxiliary circuit moving contact 8 and the auxiliary circuit static contact 7 remain in contact and conductive; S2: When the main circuit needs to be turned on, the driving mechanism 6 pushes the main circuit moving contact 5 toward the contact terminal 4 and pushes the contact bridge portion 91 toward the protrusion 10; S3: When the contact bridge portion 91 contacts the protrusion 10, it pushes the contact bridge portion 91 to bend along the elastic connection portion 92, disconnecting the conduction between the auxiliary circuit moving contact 8 and the auxiliary circuit static contact 7, and causing the elastic support sheet to abut against the substrate 90. The contact bridge portion 91 is then acted upon by the protrusion 10, causing its center to bend downward. S4: The main circuit moving contact 5 contacts the contact terminal 4, and the main circuit is turned on.

[0039] It can be seen from the present embodiment that the above-mentioned control method can simplify the structure for realizing on-off of the auxiliary circuit moving contact 8 and the auxiliary circuit static contact 7, reduce the space occupied in the installation cavity 3, and the manufacturing process of the elastic sheet 9 is easy. Moreover, through the elastic connecting portion 92, the arc-shaped connecting portion 93 and the S-shaped elastic supporting sheet, the structural deformation stability of the contact bridge portion 91 is extended, thereby extending the service life.

[0040] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A high voltage DC relay, characterized in that: include: A housing (1) is provided with an insulating cover (2) therein, and a mounting cavity (3) is formed in the insulating cover (2); Two contact terminals (4) are provided on the insulating cover (2), and one end of the terminal extends into the mounting cavity (3); The main circuit moving contact (5) is provided with a driving mechanism (6) and is movably connected in the mounting cavity (3), and is connected to the main circuit when in contact with the contact terminal (4) or disconnected when the contact is released; Auxiliary circuit static contacts (7), two of which are provided on the insulating cover (2), and one end of which extends into the mounting cavity (3); Auxiliary circuit moving contacts (8), two of which are provided at the output end of the driving mechanism (6) and are provided with elastic sheets (9) installed in the insulating cover (2); The inner wall of the insulating cover (2) is provided with a protrusion (10), and when the main circuit moving contact (5) is in contact with the contact terminal (4), the elastic sheet (9) is bent by the protrusion (10), and the auxiliary circuit moving contact (8) is separated from the auxiliary circuit static contact (7); when the main circuit moving contact (5) is disconnected from the contact terminal (4), the elastic sheet (9) is reset, and the auxiliary circuit moving contact (8) is in contact with the auxiliary circuit static contact (7).

2. The high-voltage DC relay according to claim 1, wherein: The elastic sheet (9) comprises a base plate (90) and two contact bridge portions (91) connected to the base plate (90), and the two auxiliary circuit movable contacts (8) are respectively arranged on the two contact bridge portions (91) and respectively arranged corresponding to the two auxiliary circuit static contacts (7); The contact bridge portion (91) is located above the substrate (90), and the contact bridge portion (91) is bent by the protrusion (10) to release the auxiliary circuit movable contact (8) and the auxiliary circuit static contact (7) from contact or reset to make the auxiliary circuit movable contact (8) and the auxiliary circuit static contact (7) contact and conduct.

3. The high-voltage DC relay according to claim 2, wherein: The elastic sheet (9) further includes an elastic connecting portion (92) for connecting the substrate (90) and the contact bridge portion (91), and the cross section of the elastic connecting portion (92) is in the shape of an arc; The auxiliary circuit movable contact (8) is located at one end of the contact bridge portion (91) away from the elastic connection portion (92).

4. The high-voltage DC relay according to claim 3, wherein: An arc-shaped connecting portion (93) is provided on one side of the contact bridge portion (91) close to the elastic connecting portion (92).

5. The high-voltage DC relay according to claim 3, wherein: The elastic sheet (9) further comprises a support portion (94), and the support portion (94) is mounted on an end of the contact bridge portion (91) away from the elastic connection portion (92) and is located below the auxiliary circuit moving contact (8).

6. The high-voltage DC relay according to claim 5, characterized in that: The support portion (94) is an S-shaped elastic support piece.

7. The high-voltage DC relay according to claim 1, wherein: The driving mechanism (6) includes a moving iron core (60), a connecting seat (61) mounted on one end of the moving iron core (60), and an electromagnetic coil assembly (62) sleeved on the moving iron core (60), and the main circuit moving contact (5) is mounted on the connecting seat (61); The housing (1) includes a base (100) and a top cover (101), and the electromagnetic coil assembly (62) is installed in the base (100), while the contact terminal (4) and the auxiliary circuit static contact (7) both penetrate the top cover (101) and extend to the surface of the top cover (101).

8. The high-voltage DC relay according to claim 7, characterized in that: The connecting seat (61) comprises a first supporting seat (610), supporting plates (611) arranged on both sides of the first supporting seat (610), and a second supporting seat (612) connected to a side of the supporting plate (611) away from the first supporting seat (610); The main circuit moving contact (5) is installed between the first support base (610) and the second support base (612), and a main contact spring (613) is provided between the main circuit moving contact (5) and the first support base (610), while the auxiliary circuit moving contact (8) is installed on the second support base (612).

9. The high-voltage DC relay according to claim 7, characterized in that: A reverse spring (11) is installed in the base (100) and is sleeved on the moving iron core (60).

10. A control method for a high-voltage DC relay according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: In the initial state, the main circuit moving contact (5) is separated from the contact terminal (4), while the auxiliary circuit moving contact (8) and the auxiliary circuit static contact (7) maintain contact and conduction; S2: When the main circuit needs to be turned on, the driving mechanism (6) pushes the main circuit moving contact (5) toward the contact terminal (4) and pushes the contact bridge portion (91) toward the protrusion (10); S3: When the contact bridge portion (91) contacts the protrusion (10), the contact bridge portion (91) is pushed to bend along the elastic connection portion (92), disconnecting the conduction between the auxiliary circuit movable contact (8) and the auxiliary circuit static contact (7), and causing the elastic support sheet to abut against the substrate (90), and causing the contact bridge portion (91) to bend downward in the middle under the action of the protrusion (10); S4: The main circuit moving contact (5) contacts the contact terminal (4), and the main circuit is turned on.

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