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 movable spring mechanism, a pushing mechanism, an elastic mechanism and a supporting element, the movable spring mechanism is provided with a movable contact opposite to the static contact, and the movable spring mechanism is elastically matched with the pushing mechanism through the elastic mechanism; the elastic mechanism comprises at least two flat springs arranged side by side, each flat spring comprises a base portion and a spring arm connected to the base portion, the base portions and the pushing mechanism are relatively fixed, and the ends, away from the base portions, of the spring arms make contact with the movable spring mechanism. The support element is connected to at least parts of the bases of at least two of the leaf springs. According to the high-voltage direct-current relay, the reliability of the structures and the relative positions of the base parts can be improved, and the leaf springs are prevented from being damaged and deformed.

Description

TECHNICAL FIELD

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

[0002] As a new type of electric automatic switch, the high-voltage direct-current relay can realize the normally open state or the normally closed state through the electromagnetic holding force. The current high-voltage direct-current relay generally comprises an electromagnetic assembly, a moving assembly and a static contact, and the moving contact provided on the moving spring piece of the moving assembly and the static contact provided on the static contact together serve as the contact part of the high-voltage direct-current relay. The electromagnetic assembly comprises a coil, an upper iron core and a lower iron core. When the coil is energized, the lower iron core can be magnetized, so that the lower iron core and the upper iron core attract each other, thereby driving the moving assembly to approach the static contact until the moving contact on the moving assembly and the static contact on the static contact are in contact, realizing the conduction of the circuit.

[0003] The pushing seat of the pushing mechanism and the moving spring mechanism are generally provided with a plurality of side-by-side leaf springs to elastically support the moving spring mechanism. When the distance between the moving spring mechanism and the pushing seat changes, the spring arms of the leaf springs will adapt to the elastic deformation. However, in the current moving assembly, when the moving spring mechanism moves relative to the pushing seat, the plurality of leaf springs are prone to damage or deformation. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a high-voltage direct-current relay to solve the problem that the leaf springs in the moving assembly are prone to damage or deformation due to shear force.

[0005] A high-voltage direct-current relay comprises:

[0006] a static contact provided with a static contact;

[0007] a moving assembly comprising a moving spring mechanism, a pushing mechanism, an elastic mechanism and a supporting element, the moving spring mechanism being provided with a moving contact opposite to the static contact, the moving spring mechanism being elastically matched with the pushing mechanism through the elastic mechanism; the elastic mechanism comprising at least two side-by-side leaf springs, the leaf spring comprising a base and a spring arm connected to the base, the base being fixed opposite to the pushing mechanism, one end of the spring arm away from the base being in contact with the moving spring mechanism, and the supporting element being connected to at least part of the base of the at least two leaf springs.

[0008] The high-voltage direct-current relay, the elastic mechanism is elastically matched with the pushing mechanism through the elastic mechanism of the moving spring mechanism, when the moving spring mechanism and the pushing mechanism are close to each other, a plurality of leaf springs are squeezed, the spring arm is elastically deformed, the elastic mechanism is deformed to drive the plurality of leaf springs to be close to each other or to be far away from each other, for example, at least the vertical line direction of the adjacent two base portions is deformed, or the stress of the arching of the middle part of the base portion is generated. The setting of the support element connected to at least part of the base of the at least two leaf springs can improve the reliability of the structure and the relative position between the plurality of base portions, prevent the damage and deformation of the plurality of leaf springs, thereby improving the structural reliability, performance reliability and service life of the high-voltage direct-current relay.

[0009] In one of the embodiments, the elastic mechanism further comprises a connecting structure connected to the base portions of the adjacent two leaf springs.

[0010] In one of the embodiments, the connecting structure is connected to the middle part of the base portions of the adjacent two leaf springs, and the support element covers the connecting structure.

[0011] In one of the embodiments, the leaf spring and the connecting structure are integrally formed.

[0012] In one of the embodiments, the base portion is fixedly arranged on the pushing mechanism, and the support element is fixedly connected to the side of the base portion away from the pushing mechanism, so as to press the at least two base portions on the moving spring mechanism.

[0013] In one of the embodiments, the material of the support element comprises plastic, the support element and the leaf spring are integrally formed through insert injection molding process, and at least part of the base portion is located in the support element.

[0014] In one of the embodiments, the elastic mechanism is located between the pushing mechanism and the moving spring mechanism, and the support element is located between the two spring arms and between the pushing mechanism and the moving spring mechanism.

[0015] In one of the embodiments, the support element comprises a connecting portion and a stop portion protruding from the connecting portion away from the pushing mechanism, the connecting portion is connected to the at least two base portions and is fixed relative to the pushing mechanism, when the moving contact and the stationary contact are separated under the action of the short-circuit current, the side of the stop portion away from the connecting portion is used to abut against the moving spring mechanism on the path of the moving spring mechanism moving close to the pushing mechanism.

[0016] In one of the embodiments, the support element is provided with two stop portions, and the two stop portions are arranged in the vertical line direction of the two spring arms.

[0017] In one of the embodiments, the moving spring mechanism comprises a moving spring leaf and a lower armature, the moving contact is arranged on one side of the moving spring leaf facing the stationary contact, the lower armature is fixed opposite to the moving spring leaf, both ends of the moving spring leaf protrude out of the lower armature, two spring arms are respectively arranged at both ends of the moving spring leaf protruding out of the lower armature, and the stop portion is opposite to the lower armature.

[0018] In one of the embodiments, the moving assembly further comprises two first supporting arms, the two first supporting arms are respectively arranged on two sides opposite to the moving direction of the moving spring mechanism relative to the pushing mechanism, the first supporting arms are fixed opposite to the pushing mechanism and are in sliding cooperation with the moving spring mechanism, and the high-voltage DC relay further comprises an upper armature opposite to the lower armature.

[0019] The upper armature is arranged outside the moving assembly and is fixed opposite to the stationary contact; or,

[0020] The moving assembly further comprises a second supporting arm connected to the two first supporting arms, the second supporting arm is arranged on the side of the moving spring mechanism away from the pushing mechanism, and the upper armature is fixed on the second supporting arm.

[0021] In one of the embodiments, the pushing mechanism can drive the moving spring mechanism to move towards the stationary contact, so that the high-voltage DC relay has a first state and a second state, in the first state, the moving contact is just in contact with the stationary contact, in the second state, the moving contact is pressed against the stationary contact by the elastic mechanism, in the process of switching from the first state to the second state, the pushing mechanism moves relative to the moving spring mechanism towards the stationary contact, and the distance between the stop portion and the moving spring mechanism in the second state is smaller than that in the first state.

[0022] In one of the embodiments, in the second state, the difference between the dimension of the spring arm in the moving direction of the moving spring mechanism relative to the pushing mechanism and the limit compression length of the spring arm is greater than the distance between the stop portion and the moving spring mechanism.

[0023] In one of the embodiments, the moving spring mechanism can be repelled relative to the stationary contact under the electrodynamic repulsion generated by the short-circuit current, so that the high-voltage DC relay switches from the second state to a third state, in the third state, the stop portion abuts against the moving spring mechanism to prevent the moving spring mechanism and the pushing mechanism from approaching each other, and the dimension of the spring arm in the moving direction of the moving spring mechanism relative to the pushing mechanism is greater than the limit compression length of the spring arm.

[0024] In one of the embodiments, the HVDC relay further comprises an electromagnetic assembly, the pushing mechanism comprises a pushing base and a pushing rod connected to the pushing base at a side opposite to the moving spring mechanism, the moving spring mechanism is elastically connected to the pushing base through the elastic mechanism, and the electromagnetic assembly is capable of driving the pushing base to move towards or away from the static contact through the pushing rod. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Structure diagram of the HVDC relay in some embodiments.

[0026] Figure 2 Structure diagram of the HVDC relay in some embodiments. Figure 1 Structure diagram of the HVDC relay in some embodiments.

[0027] Figure 3 Structure diagram of the HVDC relay in some embodiments. Figure 2 Structure diagram of the moving assembly of the HVDC relay in some embodiments.

[0028] Figure 4 Structure diagram of the moving assembly of the HVDC relay in some embodiments. Figure 3 Structure diagram of the moving assembly of the HVDC relay in some embodiments.

[0029] Figure 5 Structure diagram of the supporting element, the elastic mechanism and the pushing mechanism in some embodiments.

[0030] Figure 6 Structure diagram of the supporting element and the elastic mechanism integrally formed in some embodiments.

[0031] Figure 7 Structure diagram of the elastic mechanism in some other embodiments.

[0032] Figure 8 Structure diagram of the elastic mechanism in some other embodiments. Figure 7 Structure diagram of the two leaf springs connected to the connecting structure in the elastic mechanism.

[0033] Figure 9 Structure diagram of one of the leaf springs in the elastic mechanism. Figure 7 Structure diagram of one of the leaf springs in the elastic mechanism.

[0034] Figure 10 Structure diagram of the HVDC relay in some embodiments in the first state.

[0035] Figure 11 Structure diagram of the HVDC relay in some embodiments in the second state.

[0036] Figure 12 Structure diagram of the HVDC relay in some embodiments in the third state.

[0037] REFERENCE NUMERALS:

[0038] 10. High-voltage DC relay; 11. Yoke plate; 12. Electromagnetic assembly; 121. Upper core; 122. Lower core; 13. Moving assembly; 131. Moving spring mechanism; 1311. Moving spring leaf; 1313. Moving contact; 1314. Lower armature; 132. Elastic mechanism; 1320. Leaf spring; 1321. Base; 1322. Spring arm; 1323. Connecting structure; 133. Pushing mechanism; 1331. Pushing seat; 1332. Pushing rod; 1351. First branch arm; 1352. Second branch arm; 136. Supporting element; 1361. Connecting part; 1362. Stopping part; 14. Static contact; 141. Static contact; 142. Insulating cover; 143. Upper armature. DETAILED DESCRIPTION

[0039] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and that the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0042] In the present application, unless specifically defined otherwise, if there are any terms "mount", "connect", "connect", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless specifically defined otherwise, if there are any terms "mount", "connect", "connect", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.

[0045] With the application of high-voltage DC relays in various fields of equipment more and more widely, the industry has higher and higher requirements for the heat loss resistance, short-circuit resistance circuit and voltage of high-voltage DC relays. Among them, the current and voltage of the circuit applied by the high-voltage DC relay are getting higher and higher. For example, in new energy vehicles and other equipment, as the endurance mileage requirement of new energy vehicles is increasing, the capacity of the battery pack of new energy vehicles is also getting higher and higher. The current and voltage faced by the high-voltage DC relay applied in the battery pack circuit are also getting higher and higher. Therefore, when the circuit is short-circuited or overloaded, the electrodynamic repulsion generated by the moving contact and the stationary contact of the high-voltage DC relay is relatively large, which is easy to pop the moving contact and the stationary contact apart by a large distance, for example, pop the moving contact and the stationary contact apart to the limit compression state of the elastic mechanism of the moving spring mechanism, and then conduct the impact force to the pushing mechanism and the electromagnetic assembly. At this time, the impact force is too large, which is easy to cause the electromagnetic assembly and the moving assembly to fall off relative to the stationary contact, thereby causing the high-voltage DC relay to be damaged, or causing the distance between the moving contact and the stationary contact to be too far, thereby causing the arc phenomenon between the moving contact and the stationary contact to generate too much heat and burn the high-voltage DC relay, and even cause the high-voltage DC relay to explode. However, in order to improve the holding force of the electromagnetic assembly to the moving assembly to avoid the electromagnetic assembly from falling off the stationary contact due to insufficient holding force or to reduce the pop distance of the moving contact and the stationary contact, the traditional high-voltage DC relay usually needs to increase the number of turns of the coil, which increases the cost and volume of the electromagnetic assembly, and increases the volume and cost of the high-voltage DC relay.

[0046] In addition, when the elastic mechanism having a plurality of leaf springs is elastically matched between the moving spring mechanism and the pushing mechanism, the roots of the adjacent two leaf springs are usually connected to each other. Therefore, if the moving spring mechanism and the pushing mechanism are close to each other to compress the leaf springs, the spring arms of the plurality of leaf springs are easy to elastically deform, which is easy to cause the elastic mechanism to generate a shearing force for driving the plurality of leaf springs to be close to or away from each other, for example, at least a shearing force in the direction of the vertical line of the base of the adjacent two leaf springs. The shearing force will cause the adjacent two leaf springs to deform close to or away from each other, causing the connection between the adjacent leaf springs to be pulled and damaged, affecting the elastic support precision of the moving spring mechanism, and even causing the high-voltage DC relay to be damaged.

[0047] To solve the above problems, the application provides a high-voltage DC relay.

[0048] Please refer to Figures 1-4 , Figure 1 for the structural schematic diagram of the high-voltage DC relay 10 in some embodiments, Figure 2 for Figure 1 the cross-sectional schematic diagram of the high-voltage DC relay 10 shown in FIG. 1 along the A-A direction, Figure 3 and Figure 4 are respectively Figure 2The structure schematic diagram and the explosion schematic diagram of the moving assembly 13 in the high-voltage direct-current relay 10 are shown, Figure 2 The high-voltage direct-current relay 10 shown is in an initial state. In some embodiments, the high-voltage direct-current relay 10 includes a yoke plate 11, an electromagnetic assembly 12, a moving assembly 13, static contacts 14, and an insulating cover 142 provided on the yoke plate 11, the static contacts 14 provided on the insulating cover 142, the static contacts 14 can be provided in two, and each of the static contacts 14 is provided with a static contact point 141. The insulating cover 142 includes but is not limited to an insulating shell such as a ceramic cover. The moving assembly 13 includes a moving spring mechanism 131, an elastic mechanism 132, and a pushing mechanism 133, the moving spring mechanism 131 is provided with two moving contact points 1313 corresponding to the two static contact points 141. The moving spring mechanism 131 is elastically matched with the pushing mechanism 133 through the elastic mechanism 132, that is, the moving spring mechanism 131 can move towards the pushing mechanism 133 to jointly press the elastic mechanism 132 with the pushing mechanism 133, and can move away from the pushing mechanism 133 to release the elastic mechanism 132. The electromagnetic assembly 12 is provided on the side of the yoke plate 11 away from the moving spring mechanism 131, and can drive the moving assembly 13 to move towards or away from the static contact points 141 as a whole by driving the pushing mechanism 133 to move, so that the moving contact points 1313 contact the static contact points 141 to realize the conduction of the circuit, or the moving contact points 1313 are separated from the static contact points 141 to realize the disconnection of the circuit.

[0049] It can be understood that the high-voltage direct-current relay 10 can be applied to a circuit as a switching element, the static contacts 14 can be provided with a lead-out end electrically connected to the two static contact points 141, and the lead-out end is electrically connected to the circuit. When the moving contact points 1313 and the static contact points 141 are in contact one by one, the moving contact points 1313 conduct the two static contact points 141 to make the circuit conductive, at which time the high-voltage direct-current relay 10 is opened. When the moving contact points 1313 are separated from the static contact points 141, the two static contact points 141 are electrically isolated, the circuit is disconnected, and at this time the high-voltage direct-current relay 10 is closed. In some embodiments, the high-voltage direct-current relay 10 can further include a shell (not shown in the figure) provided on the insulating cover 142 and the static contacts 14, and the static contacts 14 can be led out to the outside of the shell through a conductive structure such as an electrode or a lead wire to be electrically connected to the circuit. The material of the shell includes but is not limited to an insulating material such as plastic, and the shell can isolate the static contacts 14, the insulating cover 142, and the moving assembly 13 from the outside to achieve an insulating protection effect.

[0050] In some embodiments, the pushing mechanism 133 comprises a pushing base 1331 and a pushing rod 1332 connected to the pushing base 1331 on the side opposite to the moving spring mechanism 131. The electromagnetic assembly 12 can comprise an upper core 121, a lower core 122, and a coil arranged around the upper core 121 and the lower core 122, the upper core 121 is fixedly arranged on the yoke plate 11, the coil is fixed relative to the yoke plate 11, the lower core 122 is opposite to the upper core 121 and located on the side of the upper core 121 opposite to the yoke plate 11, and the lower core 122 is capable of moving relative to the yoke plate 11 towards or away from the upper core 121. The pushing rod 1332 penetrates the upper core 121 and is inserted into the lower core 122, the pushing rod 1332 is in sliding fit with the upper core 121 and is fixed relative to the lower core 122. When the coil is energized, the upper core 121 and the lower core 122 can be magnetized, so that the upper core 121 and the lower core 122 are attracted to each other to drive the lower core 122 to move towards the upper core 121, thereby driving the pushing rod 1332 to move the moving assembly 13 as a whole towards the static contact 141.

[0051] In some embodiments, the moving assembly 13 further comprises two first arms 1351, which are respectively located on the two sides opposite to the moving direction of the moving spring mechanism 131 relative to the pushing mechanism 133 and are directly or indirectly connected to the pushing base 1331. The two first arms 1351 are in sliding fit with the moving spring mechanism 131 on the two opposite sides of the moving spring mechanism 131 to provide a limiting action on the movement of the moving spring mechanism 131 relative to the pushing base 1331 towards or away from the static contact 141. When the moving spring mechanism 131 is relatively close to the pushing base 1331, the moving spring mechanism 131 and the pushing base 1331 can press the elastic mechanism 132 to cause elastic deformation of the elastic mechanism 132. The sliding limiting of the two first arms 1351 on the moving spring mechanism 131 can provide a guiding action for the movement of the moving spring mechanism 131 relative to the pushing base 1331, thereby improving the performance stability of the high-voltage DC relay 10.

[0052] In some embodiments, the moving assembly 13 can further comprise a second arm 1352 connected to the two first arms 1351, the second arm 1352 can be arranged on the side of the moving spring mechanism 131 opposite to the pushing mechanism 133 and between the moving spring mechanism 131 and the insulating cover 142. The second arm 1352 can define a limit position of the movement of the moving spring mechanism 131 away from the pushing base 1331 on the side of the moving spring mechanism 131 towards the static contact 141, thereby preventing the moving spring mechanism 131 from being separated from the elastic mechanism 132 and the pushing base 1331, and improving the performance stability of the high-voltage DC relay 10.

[0053] In some embodiments, the moving spring mechanism 131 comprises a moving spring 1311 and a lower armature 1314 fixedly connected to the moving spring 1311, and the high-voltage DC relay 10 further comprises an upper armature 143 opposite to the lower armature 1314, and the moving contact 1313 is arranged on a side of the moving spring 1311 facing the static contact 14, and the upper armature 143 is arranged on a side of the lower armature 1314 away from the push base 1331. The upper armature 143 and the lower armature 1314 jointly form an anti-short circuit ring structure, and when the moving contact 1313 and the static contact 141 are in contact, the magnetic field generated by the moving spring 1311 and the static contact 14 can magnetize the upper armature 143 and the lower armature 1314, so that the upper armature 143 and the lower armature 1314 attract each other, which can provide a holding force for the contact of the moving contact 1313 and the static contact 141, and is beneficial to reduce the holding force required by the electromagnetic assembly 12, and is beneficial to reduce the cost and volume of the electromagnetic assembly 12.

[0054] In Figure 2 In the illustrated embodiments, the upper armature 143 is arranged outside the moving assembly 13 and fixedly arranged opposite to the static contact 14, for example, the upper armature 143 can be arranged on the insulating cover 142, and the upper armature 143 is arranged corresponding to the static contact 141 and located between the insulating cover 142 and the second supporting arm 1352. The moving assembly 13 can also not be provided with the second supporting arm 1352, and the upper armature 143 is located between the insulating cover 142 and the moving spring 1311. When the moving assembly 13 is not provided with the second supporting arm 1352, the upper armature 143 can limit the moving spring mechanism 131 on a side of the moving spring mechanism 131 away from the push base 1331, and limit the limit position of the moving spring mechanism 131 away from the push base 1331. In some embodiments, the insulating cover 142 is arranged on the moving assembly 13 and on the yoke plate 11, and the static contact 14 and the upper armature 143 are fixedly arranged on the insulating cover 142, and the static contact 14 protrudes out of the insulating cover 142 on a side away from the moving spring mechanism 131, i.e. away from the static contact 141. In other embodiments, when the moving assembly 13 is provided with the second supporting arm 1352, the upper armature 143 can also be fixedly arranged on the second supporting arm 1352 and located between the second supporting arm 1352 and the moving spring mechanism 131.

[0055] Further, in combination with Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the elastic mechanism 132 includes at least two leaf springs 1320 arranged side by side, and the number of the leaf springs 1320 includes but is not limited to two, three, four or more. Each leaf spring 1320 includes a base 1321 fixed opposite to the push seat 1331, and two spring arms 1322 connected to two ends of the base 1321 respectively, and the ends of the two spring arms 1322 away from the base 1321 are in contact with the moving spring mechanism 131. It can be understood that when the moving spring mechanism 131 is relatively close to the push seat 1331, the leaf spring 1320 can be squeezed to cause elastic deformation of the spring arm 1322. Each elastic mechanism 132 is provided with two spring arms 1322 spaced from each other to abut the moving spring mechanism 131 at different positions, which can improve the stability of the movement of the moving spring mechanism 131 relative to the push seat 1331 and reduce the risk of deflection of the moving spring mechanism 131 relative to the push seat 1331. The two spring arms 1322 can be fixedly connected to the moving spring mechanism 131 to reduce the risk of disengagement of the moving spring mechanism 131 from the elastic mechanism 132 and improve the structural reliability. Of course, the spring arm 1322 can also be in elastic cooperation with the moving spring mechanism 131 by means of elastic force without being fixedly connected to the moving spring mechanism 131, or the spring arm 1322 can also be movably connected to the moving spring mechanism 131 with a certain amount of movement, as long as the elastic cooperation between the moving spring mechanism 131 and the push seat 1331 can be achieved, which is not limited in the present application.

[0056] In some embodiments, the moving assembly 13 further includes a support element 136 connected to at least part of the base 1321 of the at least two leaf springs 1320, for example, the support element 136 is rigidly connected to the base 1321 of the plurality of leaf springs 1320.

[0057] The high-voltage DC relay 10 described above, the moving spring mechanism 131 is in elastic cooperation with the push mechanism 133 through the elastic mechanism 132, when the moving spring mechanism 131 and the push mechanism 133 are close to each other, the spring arms 1322 of the plurality of leaf springs 1320 are squeezed to cause elastic deformation of the spring arms 1322, thereby causing the elastic mechanism 132 to generate deformation to drive the plurality of leaf springs 1320 to approach or move away from each other, for example, at least generate deformation along the vertical line direction of the adjacent two bases 1321. The arrangement of the support element 136 connected to at least part of the base 1321 of the at least two leaf springs 1320 can provide support to the plurality of bases 1321 and limit the relative position between the plurality of bases 1321, thereby improving the structural and relative position reliability between the plurality of bases 1321 and preventing damage and deformation of the plurality of leaf springs 1320, thereby facilitating improvement of the structural reliability, performance reliability and service life of the high-voltage DC relay 10.

[0058] In some embodiments, the elastic mechanism 132 further comprises a connecting structure 1323, the base 1321 of each two adjacent leaf springs 1320 is connected to each other through the connecting structure 1323, and the connecting structure 1323 is arranged to improve the assembly accuracy of the two adjacent leaf springs 1320. It can be understood that when the connecting structure 1323 is arranged between the two adjacent leaf springs 1320, the deformation of the two adjacent leaf springs 1320 relatively close to or relatively far away from each other will generate a shear force at the connecting structure 1323, which is easy to cause the connecting structure 1323 to be broken and the double ring, and the limiting effect of the supporting element 136 on the two adjacent leaf springs 1320 can reduce the deformation of the two adjacent leaf springs 1320 relatively close to or relatively far away from each other, reduce the shear force at the connecting structure 1323, and avoid the connecting structure 1323 being pulled and broken due to the shear force.

[0059] It should be noted that during the extrusion of the passive spring mechanism 131 and the push seat 1331, the extrusion force is conducted from the two spring arms 1322 to the middle base 1321, and stress is also easy to generate to cause the middle part of the base 1321 to arch and be deformed and damaged. The high-voltage direct-current relay 10 provided by the present application has the supporting element 136 arranged on the elastic mechanism 132 to limit, support, protect and reinforce the base 1321, which is also conducive to reducing the risk of the base 1321 arching or being deformed and damaged due to stress, and the arrangement of the supporting element 136 can reduce the influence of the shear force and stress on the elastic mechanism 132.

[0060] In some embodiments, the connecting structure 1323 is connected to the middle part of the base 1321 of the two adjacent leaf springs 1320, and the supporting element 136 covers the connecting structure 1323. In this way, while improving the assembly accuracy of the plurality of leaf springs 1320 through the connecting structure 1323, the connecting structure 1323 is far away from the spring arm 1322 and does not affect the elastic deformation of the spring arm 1322, which is conducive to improving the stability of the elastic cooperation between the moving spring mechanism 131 and the push seat 1331, and the supporting element 136 can also effectively limit the connecting structure 1323 and the part of the base 1321 close to the connecting structure 1323, thereby effectively reducing the influence of the shear force on the connecting structure 1323. In some embodiments, the plurality of leaf springs 1320 and the connecting structure 1323 are integrally formed, for example, the materials of the leaf springs 1320 and the connecting structure 1323 are both metal, and the elastic mechanism 132 is integrally prepared by an integral injection molding process, which can further improve the assembly accuracy of the plurality of leaf springs 1320.

[0061] The connecting relationship between the supporting element 136 and the elastic mechanism 132 is not limited, as long as it can effectively support the base 1321 of the plurality of leaf springs 1320, limit the base 1321, and prevent the leaf spring 1320 from being deformed under the shear force. Figure 4As shown, in some embodiments, the base 1321 is fixedly arranged on one side of the pushing seat 1331 towards the dynamic spring mechanism 131, and the supporting element 136 is fixedly connected to the other side of the base 1321 away from the pushing seat 1331, so as to press the at least two bases 1321 on the dynamic spring mechanism 131. In the present embodiment, the supporting element 136 and the elastic mechanism 132 can both be made of metal, and the supporting element 136 and the elastic mechanism 132 are separate elements, which are connected to each other by riveting or any other suitable fixed connection mode. The base 1321 and the pushing seat 1331 jointly press at least part of the base 1321 of the plurality of leaf springs 1320, which can effectively limit the structure and shape of the plurality of leaf springs 1320 and reduce the influence of shear force on the leaf springs 1320.

[0062] Reference Figure 6 As shown, in some embodiments, the base 1321 is fixedly arranged on one side of the pushing seat 1331 towards the dynamic spring mechanism 131, and the supporting element 136 is fixedly connected to the other side of the base 1321 away from the pushing seat 1331, so as to press the at least two bases 1321 on the dynamic spring mechanism 131. In the present embodiment, the supporting element 136 and the elastic mechanism 132 can both be made of metal, and the supporting element 136 and the elastic mechanism 132 are separate elements, which are connected to each other by riveting or any other suitable fixed connection mode. The base 1321 and the pushing seat 1331 jointly press at least part of the base 1321 of the plurality of leaf springs 1320, which can effectively limit the structure and shape of the plurality of leaf springs 1320 and reduce the influence of shear force on the leaf springs 1320.

[0063] Please refer to Figure 7 , Figure 8 and Figure 9 As shown, in some embodiments, when the elastic mechanism 132 is provided with the connecting structure 1323, the elastic mechanism 132 can include three leaf springs 1320, both ends of the connecting structure 1323 are connected to the bases 1321 of two leaf springs 1320, and the other leaf spring 1320 is arranged between the two leaf springs 1320 connected to the connecting structure 1323, and the base 1321 of the leaf spring 1320 is attached to one surface of the connecting structure 1323 and connected to the connecting structure 1323. The two leaf springs 1320 connected to the connecting structure 1323 and the connecting structure can be integrally formed, and the other leaf spring 1320 is connected to the connecting structure 1323 by riveting, gluing, threaded connection or any other suitable mode. Thus, there is no direct connection between the two adjacent leaf springs 1320 in the elastic mechanism 132, and the base 1321 of the leaf spring 1320 attached to the connecting structure 1323 can also support and protect the connecting structure 1323, thereby enhancing the strength of the connecting structure 1323, and effectively reducing the risk of damage and fracture of the connecting structure 1323 due to shear force. Figures 7-9In the shown embodiment, the base of the leaf spring 1320 attached to the connecting structure 1323 can be located between the connecting structure 1323 and the push base 1331, or on the side of the connecting structure 1323 away from the push base 1331. In the present embodiment, the high-voltage DC relay 10 can also be provided with a support element 136 connecting the base 1321 of the three leaf springs 1320 and the connecting structure 1323, thereby improving the limiting effect on the leaf spring 1320 and the reinforcing effect on the connecting structure 1323, and reducing the risk of damage to the connecting structure 1323 due to shear force.

[0064] Please also refer to Figure 2 、 Figure 4 、 Figure 5 and Figure 6 In some embodiments, the elastic mechanism 132 is arranged on the push base 1331, and the support element 136 is fixed relative to the push base 1331. When the moving contact 1313 and the stationary contact 141 are separated under the action of the short-circuit current, the support element 136 is arranged to abut against the moving spring mechanism 131 in the path of movement of the moving spring mechanism 131 towards the push base 1331. It can be understood that when the support element 136 abuts against the moving spring mechanism 131, the support element 136 can prevent the moving spring mechanism 131 and the push base 1331 from continuing to move closer to each other. In some embodiments, the direction of movement of the moving spring mechanism 131 away from the stationary contact 141 is the same as the direction of movement of the moving spring mechanism 131 towards the push base 1331. It should be noted that the support element 136 can be arranged relative to one of the moving spring leaf 1311 and the lower armature 1314 in the path of movement of the moving spring mechanism 131 towards the push base 1331, or can be arranged relative to both the moving spring leaf 1311 and the lower armature 1314, as long as the support element 136 can abut against both the moving spring leaf 1311 and the lower armature 1314.

[0065] Please refer to Figure 2 In the present application, the state in which the moving contact 1313 and the stationary contact 141 are spaced apart and the electromagnetic assembly 12 does not exert a force on the push rod 1332, i.e., the state in which the high-voltage DC relay 10 is open, is referred to as the initial state of the high-voltage DC relay 10. In the initial state, the support element 136 is spaced apart from the moving spring mechanism 131. When it is necessary to contact the moving contact 1313 and the stationary contact 141 to conduct the circuit, the coil in the electromagnetic assembly 12 is energized, the lower core 122 moves towards the upper core 121, which drives the push rod 1332 to move the push base 1331, and then drives the moving spring mechanism 131 to move towards the stationary contact 141, so that the moving assembly 13 has a first state and a second state. Please refer to Figure 10As shown, when the moving assembly 13 is moved to the first state, the moving contact 1313 is just in contact with the stationary contact 141, and the high-voltage DC relay 10 is in a conducting state. In the first state, the length of the spring arm 1322 in the direction of the movement of the moving spring mechanism 131 relative to the pushing seat 1331 is the same as that in the initial state. That is, in the process of moving the moving spring mechanism 131 to the first state from the initial state by the pushing mechanism 133, the moving spring mechanism 131, the first branch arm 1351, the elastic mechanism 132, and the pushing mechanism 133 are synchronously moved.

[0066] As shown, Figure 11 As shown, after the electromagnetic assembly 12 drives the moving spring mechanism 131 to the first state by the pushing mechanism 133, the electromagnetic assembly 12 can continue to drive the pushing mechanism 133 to move to the second state. In the process of switching from the first state to the second state, since the moving contact 1313 is in contact with the stationary contact 141, the moving spring mechanism 131 is relatively fixed to the stationary contact 14, and the pushing mechanism 133 continues to move to the stationary contact 141, which causes the distance between the pushing seat 1331 and the moving spring mechanism 131 to decrease. That is, in the process of switching from the first state to the second state, the moving spring mechanism 131 is relatively close to the pushing seat 1331, and the relative closeness of the moving spring mechanism 131 and the pushing seat 1331 can press the elastic mechanism 132, so that the length of the spring arm 1322 in the direction of the movement of the moving spring mechanism 131 relative to the pushing seat 1331 decreases, and the spring arm 1322 is elastically deformed. It can be understood that in the first state and the second state, the moving contact 1313 is in contact with the stationary contact 141, and the elastic mechanism 132 can exert an elastic force on the moving spring mechanism 131 to press the moving contact 1313 against the stationary contact 14, thereby improving the stability and reliability of the contact between the moving contact 1313 and the stationary contact 141. At the same time, the elastic mechanism 132 can cooperate with the electromagnetic assembly 12 to offset at least part of the electric repulsion between the moving contact 1313 and the stationary contact 141, which is conducive to reducing the holding force requirement of the high-voltage DC relay 10 on the electromagnetic assembly 12, and is conducive to reducing the cost and size of the electromagnetic assembly 12.

[0067] 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 core 122 gradually approaches the upper core 121, and in the first state, the lower core 122 is spaced apart from the upper core 121, and in the second state, the lower core 122 can be in contact with the upper core 121, which is conducive to improving the magnetic attraction between the upper core 121 and the lower core 122 in the second state, thereby improving the holding force of the electromagnetic assembly 12 on the moving assembly 13.

[0068] In some embodiments, the support element 136 is designed to be spaced apart from the moving spring mechanism 131 in the second state, and the distance between the support element 136 and the moving spring mechanism 131 in the second state is smaller than that in the first state. In the second state, the dimension of the spring arm 1322 in the direction of the movement of the moving spring mechanism 131 relative to the pusher 1331 is larger than the distance between the support element 136 and the moving spring mechanism 131, so that when the support element 136 abuts against the moving spring mechanism 131, the dimension of the spring arm 1322 in the direction of the movement of the moving spring mechanism 131 relative to the pusher 1331 is larger than the limit compression length, in other words, the spring arm 1322 will not be compressed to the limit compression length. In some embodiments, the length of the spring arm 1322 in the direction of the movement of the moving spring mechanism 131 relative to the pusher 1331 can be equal to the vertical distance between the moving spring mechanism 131 and the pusher 1331.

[0069] In combination Figure 12 As shown, it can be understood that when the circuit is short-circuited or overloaded, for example, in the present application, the current exceeds 8kA, the electrodynamic repulsive force between the moving contact 1313 and the static contact 141 is greater than the elastic force exerted by the elastic mechanism 132 on the moving spring mechanism 131, causing the moving contact 1313 and the static contact 141 to repel each other, causing the moving spring mechanism 131 to move towards the pusher 1331, and further compressing the spring arm 1322 until the support element 136 abuts against the moving spring mechanism 131. At this time, the support element 136 provides a support effect on the moving spring mechanism 131, so that the moving spring mechanism 131 cannot move towards the pusher 1331 relative to the static contact 14. In the present application, the state in which the support element 136 abuts against the moving spring mechanism 131 to provide a support effect on the moving spring mechanism 131 is referred to as the third state of the high-voltage DC relay 10, and in the third state, the moving spring mechanism 131, the first support arm 1351 and the pusher 133 are relatively fixed, and the electromagnetic assembly 12 bears the impact force of the moving spring mechanism 131.

[0070] When the high-voltage DC relay 10 is connected to a short-circuit or overload circuit, the moving contact 1313 of the moving spring mechanism 131 and the static contact 141 of the static contact 14 are repelled by the electrodynamic repulsion force, the moving spring mechanism 131 can first compress the elastic mechanism 132 until the supporting element 136 abuts against the moving spring mechanism 131 to prevent the moving spring mechanism 131 and the pushing mechanism 133 from continuing to move close to each other. After the moving contact 1313 and the static contact 141 are repelled, the electrodynamic repulsion force between the moving contact 1313 and the static contact 141 disappears. During the movement of the moving spring mechanism 131 away from the static contact 141 to the abutting position of the supporting element 136 and the moving spring mechanism 131, the elastic mechanism 132 can effectively buffer the kinetic energy of the moving spring mechanism 131. Due to the supporting effect of the supporting element 136 on the moving spring mechanism 131, the maximum repelling distance of the moving spring mechanism 131 and the static contact 141 can be shortened. When the supporting element 136 abuts against the moving spring mechanism 131, the elastic mechanism 132 will not be compressed to the limit compression length, and the impact of the moving spring mechanism 131 on the pushing mechanism 133 will not be too large, thereby avoiding the whole moving assembly 13 from being separated from the static contact 14 due to the excessive impact, and the high-voltage DC relay 10 is damaged.

[0071] In addition, the abutting of the supporting element 136 on the moving spring mechanism 131 can hinder the moving spring mechanism 131 from continuing to move away from the static contact 141, which is beneficial to reduce the repelling distance of the moving contact 1313 and the static contact 141, and cooperates with the buffering of the elastic mechanism 132 to avoid the design of the moving assembly 13 from being separated from the static contact 14, so that the distance between the moving contact 1313 and the static contact 141 will not be too far, thereby avoiding the generation of excessive heat due to the arc phenomenon between the moving contact 1313 and the static contact 141, and the damage or even explosion of the high-voltage DC relay 10. In addition, the buffering of the elastic mechanism 132 on the moving spring mechanism 131 can also reduce the requirement of the holding force of the moving assembly 13 on the electromagnetic assembly 12, so that the electromagnetic assembly 12 can support the whole moving assembly 13 with a smaller holding force, thereby reducing the number of turns of the coil and / or the volume of the core of the electromagnetic assembly 12, and facilitating the low-cost and small-size design of the high-voltage DC relay 10. Furthermore, the supporting element 136 connected to the elastic mechanism 132 abuts against the moving spring mechanism 131 on the movement path of the moving spring mechanism 131, which can simultaneously reduce the influence of the shearing force on the leaf spring 1320 and support the moving spring mechanism 131, thereby reducing the number of elements and assembly processes, simplifying the structure and preparation process of the moving assembly 13, and also facilitating the small size and low cost of the high-voltage DC relay 10.

[0072] Therefore, in the process of switching from the second state to the third state, the high-voltage direct-current relay 10 described above first buffers the impact of the moving spring mechanism 131 through the elastic mechanism 132, and then bears the impact of the moving spring mechanism 131 through the electromagnetic assembly 12, which is beneficial to reduce the demand for the holding force of the electromagnetic assembly 12, reduce the cost and size of the electromagnetic assembly 12, and also reduce the repulsion distance between the moving contact 1313 and the static contact 141, thereby reducing the heat generated by the arc phenomenon. The high-voltage direct-current relay 10 described above can balance the effects of small size, low cost, high short-circuit current and voltage. Based on this, the high-voltage direct-current relay 10 provided in the present application can be used in circuits with high current, for example, in circuits with a working current of 8kA or less. The high-voltage direct-current relay 10 includes but is not limited to a battery pack circuit for a new energy vehicle. The high-voltage direct-current relay 10 can also be used as a switching element in the circuit of any other applicable device, which will not be described in detail in the present application.

[0073] It can be understood that in the present application, the supporting element 136 only contacts the moving spring mechanism 131 to achieve the supporting effect on the moving spring mechanism 131 in the third state, and in other states, the supporting element 136 does not interfere with the relative movement of the moving spring mechanism 131 and the push seat 1331, which is beneficial to avoid the setting of the supporting element 136 to increase the risk of the moving spring mechanism 131 being stuck, uneven force or wear and tear, and other types of interference such as sliding fit and limit fit, while achieving the supporting effect and maintaining the structural reliability of the moving assembly 13, reducing the influence of the supporting element 136 on the contact reliability of the moving assembly 13.

[0074] In some embodiments, the elastic mechanism 132 is arranged between the push seat 1331 and the moving spring mechanism 131 and abuts against the moving spring mechanism 131 and the push seat 1331, for example, the lower armature 1314 and the push seat 1331, or the moving spring piece 1311 and the push seat 1331. In this way, the space layout between the moving spring mechanism 131, the elastic mechanism 132 and the push mechanism 133 can be reasonably planned, so that the structure of the moving assembly 13 is more compact, which is beneficial to improve the space utilization efficiency of the moving assembly 13, and also beneficial to relatively far away from the contact position of the moving contact 1313 and the static contact 141, reduce the influence of the elastic mechanism 132 by high temperature, ablation and splashing, and reduce the assembly difficulty of the elastic mechanism 132 and other components.

[0075] Reference Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the support element 136 is located between the two spring arms 1322, which facilitates reasonable planning of the spatial layout of the elements, improves the structural compactness of the moving assembly 13, and avoids interference between the support element 136 and the elastic mechanism 132. In some embodiments, the support element 136 is located between the moving spring mechanism 131 and the push seat 1331, and in the initial state, the support element 136 is spaced apart from the moving spring mechanism 131 and the push seat 1331. In this way, the support element 136 is far away from the contact positions of the moving contact 1313 and the static contact 141, which is conducive to reducing the influence of high temperature and ablation splashes on the support element 136, for example, avoiding the influence of splashes on the distance between the support element 136 and the moving spring mechanism 131, which causes the switching from the second state to the third state to be affected.

[0076] In some embodiments, the support element 136 includes a connecting portion 1361 connected to at least part of the plurality of base portions 1321, and a stop portion 1362 protruding from the connecting portion 1361 away from the push seat 1331, the connecting portion 1361 is used to limit the plurality of base portions 1321, and reduce the influence of shear force on the plurality of leaf springs 1320, and the side of the stop portion 1362 away from the connecting portion 1361 is used to abut the moving spring mechanism 131 in the path of the moving spring mechanism 131 moving towards the push mechanism 133. The connecting portion 1361 can increase the connection area between the support element 136 and the base portion 1321, and improve the reliability of the connection. In some embodiments, the support element 136 is provided with two stop portions 1362, and the two stop portions 1362 are spaced apart in the vertical connection direction of the two spring arms 1322. The arrangement of the two spring arms 1322 can improve the stability of the moving spring mechanism 131 during movement relative to the push seat 1331. The two stop portions 1362 cooperate with the two spring arms 1322 to improve the support stability of the moving spring mechanism 131 in the third state, and prevent the moving spring mechanism 131 from tilting relative to the push seat 1331.

[0077] Further, in some embodiments, the two ends of the moving spring leaf 1311 protrude from the lower armature 1314, the extension direction of the moving spring leaf 1311 can be substantially parallel to the vertical connection direction of the two spring arms 1322, the two spring arms 1322 abut the two ends of the moving spring leaf 1311 protruding from the lower armature 1314, and the support element 136 is opposite to the lower armature 1314 for abutting the lower armature 1314. In this way, the layout between the moving spring leaf 1311, the lower armature 1314, the elastic mechanism 132 and the support element 136 can be reasonably planned, the structural compactness of the moving assembly 13 can be improved, and the elements can be prevented from interfering with each other, thereby improving the spatial utilization efficiency of the moving assembly 13, and improving the structural stability and performance reliability of the moving assembly 13.

[0078] In the present application, the first supporting arm 1351 is in sliding fit with the moving spring mechanism 131. The two opposite sides of the moving reed 1314 can be in sliding fit with the opposite surfaces of the two first supporting arms 1351. Alternatively, the two opposite sides of the moving reed 1311 can be in sliding fit with the two first supporting arms 1351. Alternatively, the moving reed 1311 or the lower reed 1314 can be partially inserted and slidably arranged on the first supporting arm 1351. As long as the first supporting arm 1351 can provide guiding and limiting functions for the movement of the moving spring mechanism 131 relative to the push base 1331, the above-mentioned arrangements are all acceptable. In some embodiments, the first supporting arm 1351 can be directly connected to the push base 1331, for example, by being integrally formed with the push base 1331 through insert injection molding. Alternatively, the first supporting arm 1351 can be in insertion relationship with the push base 1331. The moving assembly 13 can further include a fixing piece connected to the first supporting arm 1351 and the push base 1331, so as to indirectly connect the first supporting arm 1351 to the push base 1331 through the fixing piece.

[0079] In the present application, the moving reed 1311 can include two sub-reeds arranged side by side and spaced apart from each other. The lower reed 1314 can be connected to the two sub-reeds at the same time. Alternatively, the lower reed 1314 can include two sub-reeds spaced apart from each other, and the two sub-reeds can be connected to the two sub-reeds one by one. In this way, each moving contact 1313 of the moving reed 1311 can be formed by the corresponding positions of the two sub-reeds. With such an arrangement, the two sub-reeds can provide more stable electrical contact, reduce poor contact caused by wear or damage of a single reed, share the mechanical load of the moving contact 1313, reduce the stress of a single reed, improve the durability of the high-voltage DC relay 10, provide more uniform current distribution, reduce arc phenomenon and contact resistance, and improve electrical contact performance. Moreover, when one of the sub-reeds fails, the other sub-reed can still realize on-off control of the loop with the static contact 141, thereby improving the performance reliability of the high-voltage DC relay 10. In other embodiments, two moving contacts 1313 can also be arranged on each sub-reed. Each sub-reed can be used to conduct different circuits, so that the high-voltage DC relay 10 can be used as a switch for multiple circuits at the same time. Of course, the moving reed 1311 can also be a whole reed structure. When the moving reed 1311 includes sub-reeds, the number of sub-reeds is not limited and can be designed according to the connection reliability and functional requirements.

[0080] The technical features of the above-mentioned embodiments can be combined in any manner. 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 the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0081] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A high-voltage DC relay, characterized in that, include: The stationary contact is equipped with a stationary contact point; A moving component includes a moving spring mechanism, a pushing mechanism, an elastic mechanism, and a support element. The moving spring mechanism has a moving contact opposite to the stationary contact. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic mechanism. The elastic mechanism includes at least two leaf springs arranged side by side. Each leaf spring includes a base and a spring arm connected to the base. The base is fixed relative to the pushing mechanism. The end of the spring arm away from the base contacts the moving spring mechanism. The support element is connected to at least a portion of the bases of the at least two leaf springs.

2. The high-voltage DC relay according to claim 1, characterized in that, The elastic mechanism further includes a connecting structure that connects to the base of two adjacent leaf springs.

3. The high-voltage DC relay according to claim 2, characterized in that, The connecting structure is connected to the middle position of the base of two adjacent leaf springs, and the supporting element covers the connecting structure.

4. The high-voltage DC relay according to claim 2, characterized in that, The leaf spring and the connecting structure are integrally formed.

5. The high-voltage DC relay according to claim 1, characterized in that, The base is fixedly mounted on the pushing mechanism, and the support element is fixedly connected to the side of the base facing away from the pushing mechanism, so as to press at least two of the bases onto the moving spring mechanism.

6. The high-voltage DC relay according to claim 1, characterized in that, The support element is made of plastic, and the support element and the leaf spring are integrally formed by insert injection molding process, with at least a portion of the base located inside the support element.

7. The high-voltage DC relay according to claim 1, characterized in that, The elastic mechanism is located between the pushing mechanism and the moving spring mechanism, and the support element is located between the two spring arms and between the pushing mechanism and the moving spring mechanism.

8. The high-voltage DC relay according to any one of claims 1-7, characterized in that, The support element includes a connecting portion and a stop portion protruding from the connecting portion on the side away from the pushing mechanism. The connecting portion is connected to at least two of the base portions and is fixed relative to the pushing mechanism. When the moving contact and the stationary contact spring apart under the action of a short-circuit current, the side of the stop portion away from the connecting portion is used to abut against the moving spring mechanism on the path of the moving spring mechanism moving towards the pushing mechanism.

9. The high-voltage DC relay according to claim 8, characterized in that, The support element is provided with two stop portions, which are spaced apart in the direction of the vertical connection between the two spring arms.

10. The high-voltage DC relay according to claim 8, characterized in that, The moving spring mechanism includes a moving spring and a lower armature. The moving contact is located on the side of the moving spring facing the stationary contact. The lower armature is fixed relative to the moving spring. Both ends of the moving spring protrude from the lower armature. The two spring arms respectively abut against the two ends of the moving spring protruding from the lower armature. The stop portion is opposite to the lower armature.

11. The high-voltage DC relay according to claim 10, characterized in that, The moving assembly also includes two first arms, which are located on opposite sides of the moving spring mechanism relative to the pushing mechanism in the direction of movement. The first arms are fixed relative to the pushing mechanism and slide in cooperation with the moving spring mechanism. The high voltage DC relay also includes an upper armature opposite to the lower armature. Wherein, the upper armature is disposed outside the moving assembly and fixed relative to the stationary contact; or... The moving assembly also includes a second arm connected to the two first arms. The second arm is located on the side of the moving spring mechanism opposite to the pushing mechanism, and the upper armature is fixed to the second arm.

12. The high-voltage DC relay according to claim 8, characterized in that, The pushing mechanism can drive the moving spring mechanism to move towards the stationary contact, so that the high-voltage DC relay has a first state and a second state. In the first state, the moving contact is exactly in contact with the stationary contact. In the second state, the moving contact is pressed against the stationary contact by the elastic mechanism. During the switching process from the first state to the second state, the pushing mechanism moves towards the stationary contact relative to the moving spring mechanism. The distance between the stop part and the moving spring mechanism is smaller in the second state than in the first state.

13. The high-voltage DC relay according to claim 12, characterized in that, In the second state, the difference between the dimension of the spring arm in the direction of motion of the moving spring mechanism relative to the pushing mechanism and the limit compression length of the spring arm is greater than the distance between the stop portion and the moving spring mechanism.

14. The high-voltage DC relay according to claim 12, characterized in that, The moving spring mechanism can spring away from the stationary contact under the electric repulsive force generated by the short-circuit current, so that the high-voltage DC relay switches from the second state to the third state. In the third state, the stop part abuts against the moving spring mechanism to prevent the moving spring mechanism and the pushing mechanism from getting close to each other. The dimension of the spring arm in the direction of movement of the moving spring mechanism relative to the pushing mechanism is greater than the limit compression length of the spring arm.

15. The high-voltage DC relay according to any one of claims 1-7, characterized in that, The high-voltage DC relay also includes an electromagnetic component. The pushing mechanism includes a pushing seat and a pushing rod connected to the side of the pushing seat facing away from the moving spring mechanism. The moving spring mechanism is elastically engaged with the pushing seat through the elastic mechanism. The electromagnetic component can drive the pushing seat to move towards or away from the stationary contact through the pushing rod.

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