High-voltage direct-current relay

Abstract

The utility model relates to a high-voltage direct-current relay. The high-voltage direct-current relay comprises a static contact which is provided with a static contact point; the movable assembly comprises a pushing mechanism, a movable spring mechanism, an elastic element and a support, the movable spring mechanism is provided with a movable contact and elastically matched with the pushing mechanism through the elastic element, the support comprises two first supporting arms, and the two first supporting arms are located on the two opposite sides of the elastic element in the axial direction respectively; the two first support arms are connected to the pushing mechanism and are in sliding fit with the movable spring mechanism; the at least one first support arm comprises a support arm main body and a support structure, the support structure is inclined to the support arm main body, and one end, far away from the support arm main body, of the support structure is used for supporting the movable spring mechanism on a moving path far away from the static contact when the movable contact and the static contact are bounced off due to short-circuit current. The high-voltage direct-current relay has the advantages of being small in size, low in cost and high in short-circuit current and voltage resistance.

Description

Technical Field

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

[0002] As a new type of electric automatic switch, a high-voltage DC relay can achieve a normally open or normally closed state through electromagnetic holding force. Current high-voltage DC relays typically include an electromagnetic assembly, a moving assembly, and a static contact. The moving contact provided on the moving reed of the moving assembly and the static contact provided on the static contact serve as the contact portion of the high-voltage DC relay. The electromagnetic assembly includes a coil, an upper core, and a lower core. When the coil is energized, it magnetizes the lower core, causing the lower and upper cores to attract each other, thereby driving the moving assembly toward the static contact until the moving contact on the moving assembly contacts the static contact on the static contact, completing the circuit.

[0003] However, current high-voltage DC relays can experience excessive electrodynamic repulsion between the moving and stationary contacts when a short circuit or overload occurs, causing arcing between the moving and stationary contacts and damaging the relay. Industries using high-voltage circuits, such as the new energy sector, are increasingly demanding smaller and more short-circuit-resistant high-voltage DC relays. Utility Model Content

[0004] Based on this, it is necessary to provide a high-voltage DC relay to address the problem that the high-voltage DC relay is easily damaged due to arcing between the moving contact and the static contact when short-circuited or overloaded.

[0005] A high-voltage DC relay, comprising:

[0006] Static contact, provided with a static contact point;

[0007] A dynamic assembly comprising a push mechanism, a dynamic spring mechanism, an elastic element, and a bracket, wherein the dynamic spring mechanism is provided with a dynamic contact opposite to the static contact, the dynamic spring mechanism elastically cooperates with the push mechanism via the elastic element, and the bracket comprises two first arms, the two first arms being respectively located on opposite sides of the elastic element in the axial direction, the two first arms being connected to the push mechanism and slidably cooperated with the dynamic spring mechanism;

[0008] At least one of the first arms includes an arm body and a support structure connected to the arm body on a side facing the dynamic spring mechanism, wherein the support structure is inclined relative to the arm body. When the dynamic contact and the static contact bounce open under the action of a short-circuit current, an end of the support structure away from the arm body is used to support the dynamic spring mechanism on a path where the dynamic spring mechanism moves away from the static contact.

[0009] In the aforementioned high-voltage DC relay, when the circuit connected to the high-voltage DC relay is short-circuited or overloaded, causing the movable contact of the dynamic spring mechanism and the static contact of the static contact to spring apart due to electrodynamic repulsion, the dynamic spring mechanism can first compress the elastic element until the support structure supports the dynamic spring mechanism, thereby preventing the dynamic spring mechanism and the driving mechanism from moving closer together. Since the electrodynamic repulsion between the dynamic and static contacts disappears after the dynamic and static contacts spring apart, the elastic element can effectively buffer the kinetic energy of the dynamic spring mechanism as the dynamic spring mechanism moves away from the static contact until it abuts the support structure. Furthermore, due to the support provided by the support structure, the elastic element will not be compressed to its maximum compression length. Therefore, when the support structure supports the dynamic spring mechanism, the dynamic spring mechanism will not exert excessive impact on the driving mechanism, thereby preventing the dynamic assembly from being completely separated from the static contact due to excessive impact, thereby damaging the high-voltage DC relay.

[0010] Furthermore, the support structure's support for the dynamic spring mechanism prevents it from moving further away from the static contact, helping to reduce the distance between the dynamic and static contacts. Combined with the elastic element's cushioning to prevent the dynamic assembly from separating from the static contact, the design ensures that the distance between the dynamic and static contacts is not too far, thereby preventing arcing between the dynamic and static contacts, which could generate excessive heat and damage or even explosion of the high-voltage DC relay. Furthermore, the elastic element's cushioning of the dynamic spring mechanism can also reduce the required retention force of the dynamic assembly on the electromagnetic assembly, allowing the electromagnetic assembly to support the entire dynamic assembly with less force. This, in turn, helps reduce the number of coil turns and / or the volume of the electromagnetic assembly's core, facilitating the miniaturization of the high-voltage DC relay. Furthermore, by supporting the dynamic spring mechanism with a support structure that is tilted relative to the arm body, when the support structure is tilted relative to the arm body toward the side where the dynamic spring mechanism is located, without increasing the complexity of the structure or the manufacturing process, the distance between the end of the support structure that is distal to the arm body and the dynamic spring mechanism can be shortened, thereby further limiting the maximum spring-off distance between the dynamic spring mechanism and the static contact and reducing heat generated by arcing. When the support structure is tilted relative to the arm body toward the side where the dynamic spring mechanism is located, while effectively supporting the dynamic spring mechanism and shortening the maximum spring-off distance between the dynamic spring mechanism and the static contact, it also extends the buffering distance provided by the elastic element to the dynamic spring mechanism when the dynamic spring mechanism abuts the support structure, thus balancing the maximum spring-off distance and the buffering distance. This, in turn, helps reduce the impact force on the electromagnetic assembly when the dynamic spring mechanism abuts the support structure, thereby lowering the retention force required for the electromagnetic assembly.

[0011] In one embodiment, in the direction in which the pushing mechanism is perpendicular to the dynamic spring mechanism, the supporting structure is inclined relative to the arm body toward the side where the dynamic spring mechanism is located; or,

[0012] In a direction in which the dynamic spring mechanism is perpendicular to the pushing mechanism, the support structure is inclined relative to the arm body toward a side where the dynamic spring mechanism is located.

[0013] In one embodiment, the support structure is integrally formed with the arm body, and the support structure is formed by bending a portion of the bracket relative to the arm body.

[0014] In one embodiment, the inclination angle of the support structure relative to the arm body is adjustable.

[0015] In one embodiment, the arm body is provided with a through hole passing through the arm body, the through hole having a first side wall and a second side wall opposite to each other, the first side wall and the second side wall are arranged in sequence in the direction in which the pushing mechanism points to the dynamic spring mechanism, and the supporting structure is connected to the first side wall or the second side wall.

[0016] In one embodiment, the elastic element is disposed between the pushing mechanism and the dynamic spring mechanism, and two ends thereof abut against the dynamic spring mechanism and the pushing mechanism respectively.

[0017] In one embodiment, the support structure is located between the dynamic spring mechanism and the pushing mechanism, and is spaced apart from the dynamic spring mechanism and the pushing mechanism.

[0018] In one embodiment, the movable spring mechanism includes a relatively fixed lower armature and a movable spring piece, and the movable contact is arranged on the side of the movable spring piece facing the static contact, wherein the support structure is used to support one end of the movable spring mechanism to face the lower armature or the movable spring piece.

[0019] In one embodiment, the high-voltage DC relay also includes an upper armature opposite to the lower armature, and when the moving contact and the static contact are in contact, the upper armature and the lower armature can be magnetized and attracted to each other; wherein, the upper armature is arranged on the bracket, or the upper armature is arranged outside the moving component and fixed relative to the static contact.

[0020] In one embodiment, the pushing mechanism is capable of driving the dynamic spring mechanism to move toward the direction approaching the static contact, so that the dynamic component has a first state and a second state. In the first state, the dynamic contact is just in contact with the static contact. In the second state, the dynamic contact is pressed against the static contact by the elastic element, and the dynamic spring mechanism is spaced apart from the support structure. During the switching process from the first state to the second state, the pushing mechanism moves relative to the dynamic spring mechanism toward the direction approaching the static contact, and the distance between the dynamic spring mechanism and the support structure in the second state is smaller than that in the first state.

[0021] In one embodiment, in the second state, the difference between the length of the elastic element and the ultimate compression length of the elastic element is greater than the distance between the dynamic spring mechanism and an end of the support structure away from the arm body.

[0022] In one embodiment, the movable contact can bounce relative to the static contact under the action of the electromotive repulsive force generated by the short-circuit current to switch from the second state to the third state. In the third state, the support structure abuts against the dynamic spring mechanism to prevent the dynamic spring mechanism and the pushing mechanism from approaching each other, and the length of the elastic element is greater than the limit compression length.

[0023] In one embodiment, the high-voltage DC relay also includes an electromagnetic component, the pushing mechanism includes a pushing seat connected to the bracket and a pushing rod connected to the side of the pushing seat facing away from the dynamic spring mechanism, the pushing rod is inserted into the electromagnetic component, and the electromagnetic component can drive the pushing seat to move toward or away from the static contact through the pushing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a partial cross-section of a high-voltage DC relay in an initial state in some embodiments.

[0025] Figure 2 for Figure 1 The structural diagram of the dynamic component in the high-voltage DC relay shown in FIG.

[0026] Figure 3 for Figure 2 A schematic structural diagram of the moving component from another angle is shown.

[0027] Figure 4 for Figure 2 Exploded diagram of the moving assembly shown.

[0028] Figure 5 Schematic diagram of a partial cross-section of a high-voltage DC relay in a first state in some embodiments.

[0029] Figure 6 Schematic diagram of a partial cross-section of a high-voltage DC relay in a second state in some embodiments.

[0030] Figure 7 Schematic diagram of a partial cross-section of a high-voltage DC relay in a third state in some embodiments.

[0031] Figure 8 Schematic diagram of the structure of the dynamic components in other embodiments.

[0032] Figure 9 for Figure 8 Exploded diagram of the moving assembly shown.

[0033] Figure 10 Schematic diagram of the structure of the assembly in some embodiments.

[0034] Figure 11 for Figure 10 Exploded view of the assembly shown.

[0035] Figure 12 Schematic diagrams of the structures of assemblies in other embodiments.

[0036] Figure 13 for Figure 12 Exploded view of the assembly shown.

[0037] Reference numerals:

[0038] 10. High-voltage DC relay; 11. Yoke plate; 12. Electromagnetic assembly; 121. Upper iron core; 122. Lower iron core; 13. Moving assembly; 131. Moving spring mechanism; 1311. Moving spring plate; 1313. Moving contact; 1314. Lower armature; 132. Elastic element; 133. Pushing mechanism; 1331. Pushing seat; 1332. Pushing rod; 134. Fixing plate; 135. Bracket; 1351. First arm; 1354. Arm body; 1355. Through hole; 1357. Second arm; 136. Support structure; 137. First side wall; 138. Second side wall; 14. Static contact; 141. Static contact; 142. Insulating cover; 143. Upper armature; 20. Assembly; 21. Frame to be processed; 211. Arm to be processed. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0042] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0045] As HVDC relays become increasingly widely used in various fields, the industry's requirements for their resistance to heat loss, short circuits, and voltages are becoming increasingly stringent. The currents and voltages of the circuits used by HVDC relays are increasing. For example, in new energy vehicles and other equipment, as the range requirements for new energy vehicles increase, the capacity of their battery packs is also increasing. Consequently, the currents and voltages faced by HVDC relays in battery pack circuits are also increasing. Therefore, when the circuit is short-circuited or overloaded, the electric repulsive force generated by the moving contact and the static contact of the high-voltage DC relay is large, which can easily cause the moving contact and the static contact to bounce apart a large distance. For example, the moving contact and the static contact bounce apart until the dynamic spring mechanism squeezes the elastic element to the ultimate compression state, and then transmits the impact force to the push seat and the electromagnetic assembly. At this time, the impact force is too large, which can easily cause the electromagnetic assembly and the moving assembly to fall off relative to the static contact as a whole, causing damage to the high-voltage DC relay. Alternatively, the distance between the moving contact and the static contact bounces apart is too far, causing an arc phenomenon between the moving contact and the static contact, generating excessive heat and burning the high-voltage DC relay, or even causing the high-voltage DC relay to explode. However, in traditional high-voltage DC relays, if the holding force of the electromagnetic assembly on the moving assembly is to be increased to prevent the electromagnetic assembly from being separated from the static contact due to insufficient holding force or to reduce the bounce distance between the moving contact and the static contact, it is usually necessary to increase the number of winding turns of the coil, resulting in an increase in the cost and volume of the electromagnetic assembly, which increases the volume and cost of the high-voltage DC relay.

[0046] To solve the above problems, the present application provides a high-voltage DC relay and a method for manufacturing the same.

[0047] See Figures 1-4 As shown, Figure 1 Schematic diagram of the structure of the high-voltage DC relay 10 in the initial state in some embodiments of the present application is shown. Figure 2 and Figure 3 The schematic diagrams of the structure of the moving assembly 13 at different angles in some embodiments are shown respectively. Figure 4An exploded schematic diagram of the movable assembly 13 in some embodiments is shown. In some embodiments, the high-voltage DC relay 10 includes a yoke plate 11, an electromagnetic assembly 12, a movable assembly 13, a static contact 14, and an insulating cover 142. The insulating cover 142 is disposed on the yoke plate 11, and the static contact 14 is disposed on the insulating cover 142. Two static contacts 14 may be provided, each having a static contact point 141. The movable assembly 13 includes a dynamic spring mechanism 131, an elastic element 132, and a driving mechanism 133. The dynamic spring mechanism 131 has two dynamic contacts 1313 opposite the two static contacts 141. The dynamic spring mechanism 131 is elastically connected to the driving mechanism 133 via the elastic element 132. The electromagnetic assembly 12 is arranged on the side of the yoke iron plate 11 facing away from the dynamic spring mechanism 131, and can drive the pushing mechanism 133 to move, thereby driving the dynamic assembly 13 as a whole to move toward or away from the static contact 141, so that the dynamic contact 1313 contacts the static contact 141 to achieve circuit conduction, or the dynamic contact 1313 separates from the static contact 141 to achieve circuit disconnection.

[0048] It is understood that the high-voltage DC relay 10 can be used in a circuit as a switching element. The static contact 14 can have a lead terminal electrically connected to the two static contacts 141, and the lead terminal is electrically connected to the circuit. When the movable contact 1313 and the static contact 141 come into contact, the movable contact 1313 conducts the two static contacts 141, thereby conducting the circuit, and the high-voltage DC relay 10 is opened. When the movable contact 1313 is separated from the static contact 141, the two static contacts 141 are electrically isolated, the circuit is disconnected, and the high-voltage DC relay 10 is closed. In some embodiments, the high-voltage DC relay 10 may further include a housing (not shown) that covers the insulating cover 142 and the static contacts 14. The static contacts 14 can be extended to the outside of the housing via conductive structures such as electrodes and leads to electrically connect to the circuit. The housing may be made of, but is not limited to, an insulating material such as plastic. The housing can isolate the static contacts 14, the insulating cover 142, and the movable component 13 from the outside world, thereby providing insulation protection.

[0049] In some embodiments, the pushing mechanism 133 includes a pushing seat 1331 and a pushing rod 1332 connected to the pushing seat 1331 on the side facing away from the dynamic spring mechanism 131. The electromagnetic assembly 12 may include an upper iron core 121, a lower iron core 122, and a coil disposed around the upper iron core 121 and the lower iron core 122. The upper iron core 121 is fixedly disposed on the yoke iron plate 11, and the coil is fixed relative to the yoke iron plate 11. The lower iron core 122 is opposite to the upper iron core 121 and can move relative to the yoke iron plate 11 toward or away from the upper iron core 121. The pushing rod 1332 passes through the upper iron core 121 and is inserted into the lower iron core 122. The pushing rod 1332 slidably cooperates with the upper iron core 121 and is fixed relative to the lower iron core 122. When the coil is energized, the upper iron core 121 and the lower iron core 122 can be magnetized, so that the upper iron core 121 and the lower iron core 122 attract each other and drive the lower iron core 122 to move toward the direction close to the upper iron core 121, thereby driving the push rod 1332 to drive the entire component 13 to move toward the direction close to the static contact 141.

[0050] In some embodiments, the dynamic assembly 13 further includes a bracket 135, which is connected to the push seat 1331 and slidably engages with the dynamic spring mechanism 131. For example, the bracket 135 may include two first arms 1351 and a second arm 1357. The two first arms 1351 are respectively located on opposite sides of the elastic element 132 and the dynamic spring mechanism 131 in the axial direction, and are both directly or indirectly connected to the push seat 1331. The second arm 1357 has its ends connected to the two first arms 1351 and is located on the side of the dynamic assembly 13 facing away from the push seat 1331. The two first arms 1351 slidably engage with the dynamic spring mechanism 131 on opposite sides of the dynamic spring mechanism 131, enabling the dynamic spring mechanism 131 to move relative to the push seat 1331 in a direction toward or away from the static contact 141. When the dynamic spring mechanism 131 and the push seat 1331 are relatively close, the dynamic spring mechanism 131 and the push seat 1331 can compress the elastic element 132, causing the elastic element 132 to elastically deform. The sliding limit of the dynamic spring mechanism 131 by the two first arms 1351 can provide guidance for the movement of the dynamic spring mechanism 131 relative to the push seat 1331, thereby improving the performance stability of the high-voltage DC relay 10. The second arm 1357 can limit the movement of the dynamic spring mechanism 131 away from the push seat 1331 on the side of the dynamic spring mechanism 131 facing the static contact 141, preventing the dynamic spring mechanism 131 from separating from the elastic element 132 and the push seat 1331, thereby improving the performance stability of the high-voltage DC relay 10.

[0051] Furthermore, in some embodiments, at least one first arm 1351 includes an arm body 1354 and a support structure 136 connected to the arm body 1354 on the side facing the dynamic spring mechanism 131. In the direction in which the push seat 1331 is perpendicular to the dynamic spring mechanism 131, the support structure 136 is inclined toward the side away from the dynamic spring mechanism 131. In other words, the distance between the support structure 136 and the dynamic spring mechanism 131 gradually increases in the direction in which the push seat 1331 is perpendicular to the dynamic spring mechanism 131. The end of the support structure 136 that is distal to the arm body 1354 faces the dynamic spring mechanism 131 and is configured to support the dynamic spring mechanism 131 as it moves away from the static contact 141 when the moving contact 1313 and the static contact 141 are opened under the action of a short-circuit current, thereby preventing the dynamic spring mechanism 131 from moving further toward the push seat 1331. The drawings of this application illustrate an example in which both first arms 1351 are provided with support structures 136. In some embodiments, the movement direction of the dynamic spring mechanism 131 away from the static contact 14 is the same as the movement direction toward the push seat 1331 .

[0052] It should be noted that, in the present application, the moving contact 1313 and the static contact 141 are spaced apart, and the electromagnetic assembly 12 does not apply a force to the push rod 1332, that is, the state in which the high-voltage DC relay 10 disconnects the circuit is called the initial state. In the initial state, the support structure 136 and the dynamic spring mechanism 131 are spaced apart. When the moving contact 1313 and the static contact 141 need to be brought into contact to conduct the circuit, the coil in the electromagnetic assembly 12 is energized, and the lower iron core 122 moves toward the direction close to the upper iron core 121, which can drive the push rod 1332 to drive the pushing mechanism 133, and then drive the dynamic spring mechanism 131 to move toward the direction close to the static contact 141, so that the moving assembly 13 has a first state and a second state. Combined Figure 5 and Figure 6 As shown, when the movable assembly 13 moves to the first state, the movable contact 1313 contacts the stationary contact 141, and the high-voltage DC relay 10 conducts the circuit. In the first state, the length of the elastic element 132 is the same as in the initial state. In other words, when the pushing mechanism 133 drives the movable spring mechanism 131 toward the stationary contact 141 to switch from the initial state to the first state, the movable spring mechanism 131, the bracket 135, the elastic element 132, and the pushing mechanism 133 move synchronously.

[0053] After the electromagnetic assembly 12 drives the dynamic spring mechanism 131 to the first state via the pushing mechanism 133, the electromagnetic assembly 12 continues to drive the pushing mechanism 133 to move toward the second state, toward the static contact 141. During the transition from the first state to the second state, the dynamic contact 1313 contacts the static contact 141, and the dynamic spring mechanism 131 and the static contact 14 are relatively fixed. The pushing mechanism 133 continues to move toward the static contact 141, causing the distance between the pushing seat 1331 and the dynamic spring mechanism 131 to decrease. In other words, during the transition from the first state to the second state, the dynamic spring mechanism 131 and the pushing seat 1331 are relatively close. This relative proximity of the dynamic spring mechanism 131 and the pushing seat 1331 compresses the elastic element 132, causing the length of the elastic element 132 to decrease and causing elastic deformation of the elastic element 132. It is understood that in both the first and second states, the movable contact 1313 is in contact with the static contact 141, and in the second state, the elastic element 132 can exert an elastic force on the movable contact 1313 to press the movable spring mechanism 131 against the static contact 14, thereby improving the stability and reliability of the contact between the movable contact 1313 and the static contact 141. At the same time, the elastic element 132 can cooperate with the electromagnetic assembly 12 to offset the electromotive force between the movable contact 1313 and the static contact 141, thereby reducing the retention force required by the high-voltage DC relay 10 for the electromagnetic assembly 12 and thus reducing the cost and size of the electromagnetic assembly 12.

[0054] It can be understood that in the process of switching from the initial state to the first state, and in the process of switching from the first state to the second state, the lower iron core 122 gradually approaches the upper iron core 121, and in the first state, the lower iron core 122 is spaced apart from the upper iron core 121, and in the second state, the lower iron core 122 can just contact the upper iron core 121, which is conducive to enhancing the magnetic attraction between the upper iron core 121 and the lower iron core 122 in the second state, thereby enhancing the holding force of the electromagnetic component 12 on the moving component 13.

[0055] In some embodiments, the position of support structure 136 is designed so that, in the second state, support structure 136 remains spaced apart from dynamic spring mechanism 131, and the distance between dynamic spring mechanism 131 and support structure 136 is smaller in the second state than in the first state. Furthermore, in the second state, the distance between support structure 136 and push seat 1331 is greater than the ultimate compression length of elastic element 132. In other words, in the second state, the difference between the length of elastic element 132 and its ultimate compression length is greater than the distance between dynamic spring mechanism 131 and support structure 136. In some embodiments, the length of elastic element 132 can be equal to the distance between dynamic spring mechanism 131 and push seat 1331.

[0056] Combine Figure 7As shown, it can be understood that when the circuit is short-circuited or overloaded, taking the current exceeding 8 kA as an example in this application, the electrokinetic repulsive force between the movable contact 1313 and the static contact 141 becomes greater than the elastic force exerted on the movable contact 1313 by the elastic element 132, causing the movable contact 1313 and the static contact 141 to spring apart, causing the movable spring mechanism 131 to move toward the push seat 1331 and further compress the elastic element 132 until the movable spring mechanism 131 abuts the support structure 136. At this point, the support structure 136 provides support for the movable spring mechanism 131, preventing the movable spring mechanism 131 from moving relative to the push seat 1331 toward the push seat 1331. In this application, the state in which the support structure 136 abuts against the dynamic spring mechanism 131 to provide support for the dynamic spring mechanism 131 is referred to as the third state of the high-voltage DC relay 10. In the third state, the dynamic spring mechanism 131, the bracket 135 and the pushing mechanism 133 are relatively fixed, and the electromagnetic assembly 12 bears the impact force of the dynamic spring mechanism 131.

[0057] It can be understood that in the present application, the support structure 136 contacts the dynamic spring mechanism 131 only in the third state to achieve a supporting effect. In other states, the support structure 136 will not interfere with the movement of the dynamic spring mechanism 131, which is beneficial to avoid the setting of the support structure 136 causing other types of interference with the movement of the dynamic spring mechanism 131, such as sliding fit, limit fit, etc., thereby increasing the risk of the dynamic spring mechanism 131 getting stuck, uneven force, or wear and scraping. While achieving the supporting effect, it is also beneficial to maintain the structural reliability of the dynamic component 13 and reduce the impact of the support structure 136 on the contact reliability of the dynamic component 13.

[0058] In the aforementioned high-voltage DC relay 10, when the circuit connected to the high-voltage DC relay 10 is short-circuited or overloaded, causing the movable contact 1313 of the dynamic spring mechanism 131 and the static contact 141 of the static contact 14 to spring apart due to electrodynamic repulsion, the dynamic spring mechanism 131 can first compress the elastic element 132 until the support structure 136 supports the dynamic spring mechanism 131, thereby preventing the dynamic spring mechanism 131 and the pushing mechanism 133 from moving closer together. Since the electrodynamic repulsion between the movable contact 1313 and the static contact 141 disappears after the dynamic contact 1313 and the static contact 141 spring apart, the elastic element 132 can effectively buffer the kinetic energy of the dynamic spring mechanism 131 as the dynamic spring mechanism 131 moves away from the static contact 141 until it abuts the support structure 136. Moreover, due to the supporting effect of the support structure 136, the elastic element 132 will not be compressed to the maximum compression length, so that when the support structure 136 supports the dynamic spring mechanism 131, the impact of the dynamic spring mechanism 131 on the pushing mechanism 133 will not be too large, thereby avoiding the dynamic component 13 being completely separated from the static contact 14 due to excessive impact, thereby avoiding damage to the high-voltage DC relay 10.

[0059] Furthermore, the supporting effect of the support structure 136 on the dynamic spring mechanism 131 can prevent the dynamic spring mechanism 131 from moving further away from the static contact 141, which is beneficial to limiting the maximum relative distance between the dynamic spring mechanism 131 and the static contact 14, reducing the relative bounce distance between the dynamic contact 1313 and the static contact 141, and cooperating with the buffering of the elastic element 132 to prevent the dynamic component 13 from separating from the static contact 14, so that the distance between the dynamic contact 1313 and the static contact 141 will not be too far, thereby helping to avoid the arcing phenomenon between the dynamic contact 1313 and the static contact 141 to generate excessive heat, which may cause damage to the high-voltage DC relay 10 or even explosion.

[0060] In addition, the buffering of the dynamic spring mechanism 131 by the elastic element 132 can also reduce the holding force requirement of the dynamic component 13 on the electromagnetic component 12, so that the electromagnetic component 12 can support the entire dynamic component 13 with a smaller holding force, thereby helping to reduce the number of coil winding turns and / or the volume of the iron core of the electromagnetic component 12, which is beneficial to the miniaturization design of the high-voltage DC relay 10.

[0061] Furthermore, the support structure 136 that is inclined relative to the arm body 1354 is used to support the dynamic spring mechanism 131 at one end away from the arm body 1354. Without increasing the complexity of the structure and the complexity of the manufacturing process, the inclined setting can also shorten the distance between the end of the support structure 136 away from the arm body 1354 and the dynamic spring mechanism 131, thereby further limiting the maximum rebound distance between the dynamic spring mechanism 131 and the static contact 141, and reducing the heat generated by the arc phenomenon.

[0062] Thus, in the process of switching from the second state to the third state, the above-mentioned high-voltage DC relay 10 first buffers the impact of the dynamic spring mechanism 131 through the elastic element 132, and then the electromagnetic assembly 12 bears the impact of the dynamic spring mechanism 131, which is conducive to reducing the demand for the holding force of the electromagnetic assembly 12, and is conducive to reducing the cost and volume of the electromagnetic assembly 12. At the same time, it can also reduce the spring distance between the moving contact 1313 and the static contact 141, thereby reducing the heat generated by the arc phenomenon. The above-mentioned high-voltage DC relay 10 can take into account the effects of small size, low cost and high short-circuit current and voltage resistance. Based on this, the high-voltage DC relay 10 provided in the present application can be used in circuits with higher currents, such as circuits with an operating current of less than 8kA. The high-voltage DC relay 10 includes but is not limited to being used in battery pack circuits for new energy vehicles. The high-voltage DC relay 10 can also be used in circuits of any other applicable equipment as a switching element, which will not be described in detail in this application.

[0063] It should be noted that in the embodiments shown in the various figures of this application, in the direction in which the push seat 1331 is perpendicular to the dynamic spring mechanism 131, the support structure 136 is tilted toward the side away from the dynamic spring mechanism 131. This can shorten the distance between the support structure 136 and the dynamic spring mechanism 131, thereby shortening the maximum spring-off distance between the dynamic spring mechanism 131 and the static contact 141. In other embodiments, in the direction in which the dynamic spring mechanism 131 is perpendicular to the push seat 1331, the support structure 136 is tilted toward the side away from the dynamic spring mechanism 131. In other words, in the direction in which the push seat 1331 is perpendicular to the dynamic spring mechanism 131, the distance between the support structure 136 and the dynamic spring mechanism 131 gradually decreases. Such a configuration can achieve effective support for the dynamic spring mechanism 131 to shorten the maximum rebound distance between the dynamic spring mechanism 131 and the static contact 141, and at the same time can extend the buffering distance of the elastic element 132 on the dynamic spring mechanism 131 when the dynamic spring mechanism 131 moves to abut the support structure 136, balancing the maximum rebound distance and the buffering distance, thereby helping to reduce the impact force on the electromagnetic assembly 12 when the dynamic spring mechanism 131 abuts the support structure 136, reducing the holding force requirements for the electromagnetic assembly 12, and helping to further reduce the volume and cost of the electromagnetic assembly 12.

[0064] In some embodiments, the elastic element 132 is disposed between the push seat 1331 and the dynamic spring mechanism 131, with its two ends respectively abutting the dynamic spring mechanism 131 and the push seat 1331. The two ends of the elastic element 132 can be respectively connected to the dynamic spring mechanism 131 and the push seat 1331. This arrangement allows for a rational planning of the spatial layout between the dynamic spring mechanism 131, the elastic element 132, and the push seat 133, making the structure of the dynamic assembly 13 more compact and facilitating improved spatial efficiency of the dynamic assembly 13. It also facilitates positioning the elastic element 132 relatively away from the contact position between the dynamic contact 1313 and the static contact 141, reducing the effects of high temperature and ablation spatter on the elastic element 132 and reducing the difficulty of assembling the elastic element 132 with other components. It can be understood that when the support structure 136 is located between the dynamic spring mechanism 131 and the pushing seat 1331 and is spaced apart from the dynamic spring mechanism 131 and the pushing seat 1331 in the initial state, the support structure 136 is also farther away from the contact position of the dynamic contact 1313 and the static contact 141, which is also beneficial to reduce the influence of high temperature and ablation splashes on the support structure 136. For example, it can avoid that the distance between the support structure 136 and the dynamic spring mechanism 131 is reduced due to splashes, thereby preventing the switching from the second state to the third state from being affected.

[0065] Please see again Figure 4 and Figure 5As shown, in some embodiments, the dynamic spring mechanism 131 includes a dynamic spring piece 1311 and a lower armature 1314 fixedly connected to the dynamic spring piece 1311. The high-voltage DC relay 10 also includes an upper armature 143 opposite the lower armature 1314. The dynamic contact 1313 is located on the side of the dynamic spring piece 1311 facing the static contact 14. The upper armature 143 and the lower armature 1314 together form an anti-short-circuit ring structure. The upper armature 143 is located on the side of the lower armature 1314 facing away from the push seat 1331. The upper armature 143 can be fixed to the bracket 135 and located on the side of the dynamic spring piece 1311 facing away from the push seat 1331. The upper armature 143 can also be located outside the dynamic assembly 13 and fixed relative to the static contact 14. For example, the insulating cover 142 is disposed over the movable assembly 13 and on the yoke plate 11. The static contact 14 and the upper armature 143 are both fixedly disposed on the insulating cover 142. The static contact 14 faces away from the movable spring mechanism 131, that is, the side facing away from the static contact 141 protrudes out of the insulating cover 142. When the movable contact 1313 and the static contact 141 come into contact, the magnetic field generated by the movable spring 1311 and the static contact 14 can magnetize the upper armature 143 and the lower armature 1314, causing the upper armature 143 and the lower armature 1314 to attract each other, thereby providing a holding force for the movable contact 1313 and the static contact 141 to maintain contact, thereby reducing the holding force required for the electromagnetic assembly 12 and also reducing the cost and volume of the electromagnetic assembly 12.

[0066] It should be noted that when the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 can be arranged corresponding to the static contact 141 and located between the insulating cover 142 and the movable spring piece 1311. The upper armature 143 can also limit the movable spring mechanism 131 on the side facing away from the push seat 1331, thereby limiting the movable spring mechanism 131 to an extreme position away from the push seat 1331. Therefore, when the upper armature 143 is disposed on the insulating cover 142, the bracket 135 of the movable assembly 13 can omit the second arm 1357, and only have two first arms 1351 connected to the push seat 1331 and located on opposite sides of the movable spring mechanism 131. Of course, when the upper armature 143 is disposed on the insulating cover 142 , the upper armature 143 and the movable spring piece 1311 may also be separated by the second arm 1357 of the bracket 135 , and the second arm 1357 limits the extreme position of the movable spring mechanism 131 away from the push seat 1331 .

[0067] When the high-voltage DC relay 10 is provided with a short-circuit ring structure, the end of the support structure 136 away from the first arm 1351 can be directly opposite one of the lower armature 1314 or the movable spring 1311. This is sufficient as long as it can abut against one of the lower armature 1314 and the movable spring 1311 along the path of the movable spring mechanism 131 moving toward the push seat 1331 to provide support for the movable spring mechanism 131. When both first arms 1351 are provided with support structures 136, the two support structures 136 can respectively face the movable spring 1311 and the lower armature 1314. The two support structures 136 can simultaneously abut against the movable spring 1311 and the lower armature 1314, respectively, to provide more stable and reliable support for the movable spring mechanism 131. The two support structures 136 can also simultaneously face either the movable spring 1311 or the lower armature 1314. The two support structures 136 disposed on opposite sides of the elastic element 132 in the axial direction provide uniform support for the dynamic spring mechanism 131. Combined with the guiding effect of the support arm body 1354 on the dynamic spring mechanism 131, this improves the stability and reliability of the movement of the dynamic spring mechanism 131 relative to the push seat 1331 and prevents the dynamic spring mechanism 131 from swinging. Of course, in some embodiments, the short-circuit ring structure can be omitted, and the two sides of the dynamic spring piece 1311 can respectively abut against the second support arm 1357 and the elastic element 132.

[0068] It is understandable that when the upper armature 143 is provided on the bracket 135, for example, on the second arm 1357 and located between the second arm 1357 and the movable spring 1311, the upper arm 143 is provided on the bracket 135, for example, on the second arm 1357 and located between the second arm 1357 and the movable spring 1311. Figure 5 and Figure 6 As shown, if the upper armature 143 and the lower armature 1314 are in contact in the first state, then in the second state, because the movable spring 1311 and the lower armature 1314 have moved a certain distance toward the push seat 1331 relative to the first state, the upper armature 143 and the lower armature 1314 are spaced apart. Furthermore, when the upper armature 143 is disposed on the insulating cover 142, if the lower armature 1314 is in contact with the upper armature 143 in the first state, then the upper armature 143 and the lower armature 1314 are also in contact in the second state. In other embodiments, the high-voltage DC relay 10 may further mount the upper armature 143 via a carrier structure additionally disposed on the yoke plate 11 to secure the upper armature 143 between the insulating cover 142 and the lower armature 1314. This is sufficient as long as the upper armature 143 and the lower armature 1314 can attract each other in both the first and second states to provide a retaining force between the movable contact 1313 and the stationary contact 141.

[0069] In the present application, the description of the first support arm 1351 as slidingly engaged with the dynamic spring mechanism 131 can be that the opposite sides of the lower armature 1314 slide in engagement with the opposing surfaces of the two first support arms 1351, or that the opposite sides of the dynamic spring piece 1311 slide in engagement with the two first support arms 1351, or that a portion of the dynamic spring piece 1311 or the lower armature 1314 is inserted into and slidably disposed on the first support arm 1351. As long as the first support arm 1351 can provide guidance and limit the movement of the dynamic spring mechanism 131 relative to the push seat 1331, the requirements are met. In some embodiments, the first support arm 1351 of the bracket 135 can be directly connected to the push seat 1331, and the dynamic assembly 13 can also include a fixing plate 134 connected to the first support arm 1351 and the push seat 1331, with the bracket 135 indirectly connected to the push seat 1331 via the fixing plate 134.

[0070] Please see again Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments, support structure 136 is integrally formed with arm body 1354. Support structure 136 is formed by bending a portion of bracket 135 relative to arm body 1354. This arrangement can enhance the connection strength between support structure 136 and arm body 1354, simplify the process of installing support structure 136, and reduce manufacturing costs. Furthermore, by bending support structure 136, the angle between support structure 136 and arm body 1354 can be more easily controlled, thereby better controlling the distance between support structure 136 and dynamic spring mechanism 131 and limiting the maximum spring-out distance between dynamic contact 1313 and static contact 141. Furthermore, in some embodiments, after the dynamic component 13 is prepared, the inclination angle of the support structure 136 relative to the support arm body 1354 can be adjusted. For example, the inclination angle of the support structure 136 relative to the support arm body 1354 can be adjusted with the help of tools such as a wrench, thereby flexibly adjusting the distance between the support structure 136 and the dynamic spring mechanism 131, thereby achieving the effect of adjusting the maximum rebound distance of the dynamic contact 1313 and the static contact 141 according to different support requirements.

[0071] In some embodiments, the arm body 1354 is provided with a through hole 1355 that passes through the arm body 1354 . The through hole 1355 has a first side wall 137 and a second side wall 138 that are opposite to each other. The first side wall 137 and the second side wall 138 are sequentially arranged in the direction from the pushing mechanism 133 to the dynamic spring mechanism 131 . Figure 2-Figure 4 As shown, in some embodiments, the support structure 136 is connected to the first side wall 137, referring to Figure 8 and Figure 9As shown, in other embodiments, support structure 136 is connected to second sidewall 138. It will be appreciated that when support structure 136 is not bent to form, the portion forming support structure 136 can be located within through-hole 1355. Support structure 136 can be formed by bending this portion relative to the other portions. When support structure 136 is connected to first sidewall 137, the distance between support structure 136 and dynamic spring mechanism 131 is extended, thereby extending the maximum spring-off distance between dynamic contact 1313 and static contact 141. When support structure 136 is connected to second sidewall 138, the distance between support structure 136 and dynamic spring mechanism 131 is shortened, thereby shortening the maximum spring-off distance between dynamic contact 1313 and static contact 141. The specific configuration of support structure 136 can be designed based on support requirements.

[0072] In some embodiments, when the high-voltage DC relay 10 is provided with a short-circuit ring structure, the lower armature 1314 can be connected to the middle part of the movable spring 1311, and the two end parts of the movable spring 1311 outside the lower armature 1314 form a movable contact 1313. The support structure 136 can be opposite to the lower armature 1314, which is conducive to adapting to the position layout of the lower armature 1314 and the first arm 1351, and reducing the difficulty of preparing the support structure 136.

[0073] It is understood that when the support structure 136 and the arm body 1354 are integrally formed, the first arm 1351 can be entirely made of any suitable metal material. This provides a certain degree of elastic deformation between the support structure 136 and the arm body 1354. When the dynamic spring mechanism 131 is switched to the third state, the elastic deformation between the support structure 136 and the arm body 1354 can help buffer some of the impact force of the dynamic spring mechanism 131, thereby also reducing the required holding force on the electromagnetic assembly 12.

[0074] In the embodiments shown in the accompanying drawings, the movable spring 1311 is a single-piece spring structure. In other embodiments, the movable spring 1311 may also include two sub-springs arranged in parallel and spaced apart from each other. When the movable spring mechanism 131 is provided with a lower armature 1314, the lower armature 1314 may be simultaneously connected to the two sub-springs. The lower armature 1314 may also include two sub-armatures spaced apart from each other, with the two sub-armatures correspondingly connected to the two sub-springs. Each movable contact 1313 of the movable spring 1311 may be formed by the corresponding positions of the two sub-springs. With this arrangement, the two sub-springs can provide more stable electrical contact, reduce poor contact caused by wear or damage to a single spring, share the mechanical load of the movable contact 1313, reduce the stress of a single spring, improve the durability of the high-voltage DC relay 10, and provide more uniform current distribution, reduce arcing and contact resistance, and improve electrical contact performance. Furthermore, when one of the sub-reeds fails, the other sub-reed can still realize on-off control of the circuit with the static contact 141 , thereby improving the performance reliability of the high-voltage DC relay 10 .

[0075] The elastic element 132 includes but is not limited to any suitable elastic component such as a coil spring and a leaf spring. In the drawings of this application, a coil spring is used as an example. The connection setting and orientation setting between the elastic element 132 and the dynamic spring mechanism 131 and the pushing mechanism 133 are not limited, as long as the elastic coordination between the dynamic spring mechanism 131 and the pushing mechanism 133 can be achieved to buffer the dynamic spring mechanism 131 during the switching process from the second state to the third state.

[0076] The present application also provides a method for preparing a high-voltage DC relay 10, which is used to prepare the high-voltage DC relay 10 as described in any of the above embodiments. In some embodiments, the method for preparing the high-voltage DC relay 10 includes the following steps:

[0077] Combine Figure 10 and Figure 11 As shown, an assembly 20 is provided, which includes a pushing mechanism 133, a dynamic spring mechanism 131, an elastic element 132, and a frame 21 to be processed. The dynamic spring mechanism 131 elastically cooperates with the pushing mechanism 133 through the elastic element 132. The frame 21 to be processed includes two arms 211 to be processed. The two arms 211 to be processed are respectively located on opposite sides of the elastic element 132 in the axial direction. The two arms 211 to be processed are both connected to the pushing mechanism 133 and slidably cooperate with the dynamic spring mechanism 131.

[0078] Combine Figure 2 、 Figure 3 、 Figure 10 and Figure 11As shown, the arm 211 to be processed is bent to form an arm body 1354 and a support structure 136, wherein the support structure 136 is bent relative to the arm body 1354 toward the side where the dynamic spring mechanism 131 is located. The processed arm 211 forms the first arm 1351 of the high-voltage DC relay 10.

[0079] The above-described preparation method can simplify the preparation process of the support structure 136 and reduce the preparation cost of the high-voltage DC relay 10. Furthermore, after the assembly of the support arm 211 to be processed and the other components of the movable assembly 13 is completed, the support structure 136 is bent. The bending angle of the support structure 136 relative to the support arm body 1354 can be set according to the specific structure of the assembled movable assembly 13, as well as different retention force and spring-off distance requirements. This allows for flexible adjustment of the distance between the end of the support structure 136 away from the support arm body 1354 and the dynamic spring mechanism 131, thereby achieving the effect of flexibly designing the maximum spring-off distance between the dynamic spring mechanism 131 and the static contact 14.

[0080] Furthermore, in some embodiments, after the high-voltage DC relay 10 is manufactured by the manufacturing method, the manufacturing method further includes:

[0081] The bending angle of the support structure 136 relative to the arm body 1354 is adjusted to adjust the distance between the end of the support structure 136 away from the arm body 1354 and the dynamic spring mechanism 131. As can be seen, the support structure 136 is formed integrally with the arm body 1354 by bending. During use of the high-voltage DC relay 10, the angle between the support structure 136 and the arm body 1354 can be adjusted to meet different support requirements, thereby adjusting the maximum spring-opening distance between the movable contact 1313 and the static contact 141 in real time to meet different usage requirements.

[0082] It is understood that, in the preparation method, the Figure 10 and Figure 11 In the assembly 20 shown in FIG. 1 , the support structure 136 is connected to the first side wall 137 of the arm body 1354. In other embodiments, the preparation method may also be as follows: Figure 12 and Figure 13 As shown in the assembly diagram, in the obtained moving assembly 13, the support structure 136 is connected to the second side wall 138 of the support arm body 1354, that is, Figure 8 and Figure 9 The moving assembly 13 is shown.

[0083] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A high voltage DC relay, characterized in that: include: Static contact, provided with a static contact point; A dynamic assembly comprising a push mechanism, a dynamic spring mechanism, an elastic element, and a bracket, wherein the dynamic spring mechanism is provided with a dynamic contact opposite to the static contact, the dynamic spring mechanism elastically cooperates with the push mechanism via the elastic element, and the bracket comprises two first arms, the two first arms being respectively located on opposite sides of the elastic element in the axial direction, the two first arms being connected to the push mechanism and slidably cooperated with the dynamic spring mechanism; At least one of the first arms includes an arm body and a support structure connected to the arm body on a side facing the dynamic spring mechanism, wherein the support structure is inclined relative to the arm body. When the dynamic contact and the static contact bounce open under the action of a short-circuit current, an end of the support structure away from the arm body is used to support the dynamic spring mechanism on a path where the dynamic spring mechanism moves away from the static contact.

2. The high voltage DC relay according to claim 1, characterized in that: In the direction in which the pushing mechanism is perpendicular to the dynamic spring mechanism, the supporting structure is inclined relative to the arm body toward the side where the dynamic spring mechanism is located; or, In a direction in which the dynamic spring mechanism is perpendicular to the pushing mechanism, the support structure is inclined relative to the arm body toward a side where the dynamic spring mechanism is located.

3. The high voltage DC relay according to claim 1, characterized in that: The support structure is integrally formed with the arm body, and the support structure is formed by bending a portion of the bracket relative to the arm body.

4. The high-voltage DC relay according to claim 1, characterized in that: The inclination angle of the support structure relative to the arm body is adjustable.

5. The high voltage DC relay according to claim 1, characterized in that: The arm body is provided with a through hole passing through the arm body, and the through hole has a first side wall and a second side wall opposite to each other. The first side wall and the second side wall are arranged in sequence in the direction from the pushing mechanism to the dynamic spring mechanism, and the supporting structure is connected to the first side wall or the second side wall.

6. The high-voltage DC relay according to claim 1, characterized in that: The elastic element is arranged between the pushing mechanism and the dynamic spring mechanism, and two ends of the elastic element are respectively in contact with the dynamic spring mechanism and the pushing mechanism.

7. The high-voltage DC relay according to claim 1, characterized in that: The supporting structure is located between the dynamic spring mechanism and the pushing mechanism, and is spaced apart from the dynamic spring mechanism and the pushing mechanism.

8. The high-voltage DC relay according to any one of claims 1 to 7, characterized in that: The dynamic spring mechanism includes a relatively fixed lower armature and a dynamic spring piece, and the dynamic contact is arranged on the side of the dynamic spring piece facing the static contact, wherein the support structure is used to support one end of the dynamic spring mechanism to face the lower armature or the dynamic spring piece.

9. The high-voltage DC relay according to claim 8, characterized in that: The high-voltage DC relay also includes an upper armature opposite to the lower armature. When the moving contact and the static contact are in contact, the upper armature and the lower armature can be magnetized and attracted to each other; wherein, the upper armature is arranged on the bracket, or the upper armature is arranged outside the moving component and fixed relative to the static contact.

10. The high-voltage DC relay according to any one of claims 1 to 7, characterized in that: The pushing mechanism can drive the dynamic spring mechanism to move in a direction approaching the static contact, so that the dynamic component has a first state and a second state. In the first state, the dynamic contact is just in contact with the static contact. In the second state, the dynamic contact is pressed against the static contact by the elastic element. The dynamic spring mechanism is spaced apart from the support structure. During the switching process from the first state to the second state, the pushing mechanism moves relative to the dynamic spring mechanism in a direction approaching the static contact. The distance between the dynamic spring mechanism and the support structure in the second state is smaller than that in the first state.

11. The high-voltage DC relay according to claim 10, characterized in that: In the second state, the difference between the length of the elastic element and the ultimate compression length of the elastic element is greater than the distance between the dynamic spring mechanism and an end of the support structure away from the arm body.

12. The high-voltage DC relay according to claim 10, characterized in that: The movable contact can bounce relative to the static contact under the action of the electromotive repulsive force generated by the short-circuit current to switch from the second state to the third state. In the third state, the support structure abuts against the dynamic spring mechanism to prevent the dynamic spring mechanism and the pushing mechanism from approaching each other, and the length of the elastic element is greater than the limit compression length.

13. The high-voltage DC relay according to any one of claims 1 to 7, characterized in that: The high-voltage DC relay also includes an electromagnetic component, and the pushing mechanism includes a pushing seat connected to the bracket and a pushing rod connected to the side of the pushing seat facing away from the dynamic spring mechanism. The pushing rod is inserted into the electromagnetic component, and the electromagnetic component can drive the pushing seat to move toward or away from the static contact through the pushing rod.

Images