WO2026001421A1 - High-voltage direct-current relay - Google Patents

Abstract

The present application relates to a high-voltage direct-current relay (10), comprising a static contact (14) and a moving assembly (13). The static contact (14) is provided with a static contact point (141). The moving assembly (13) comprises a pushing mechanism (133), a moving spring mechanism (131), an elastic element (132), and a support (135); the pushing mechanism (133) comprises a pushing seat (1331), and a pushing rod (1332) and a support structure (136) connected to the pushing seat (1331); the moving spring mechanism (131) is arranged on the side of the support structure (136) facing away from the pushing seat (1331), and is provided with a moving contact point opposite to the static contact point (141); the moving spring mechanism (131) works in elastic cooperation with the pushing mechanism (133) by means of the elastic element (132); the support (135) is connected to the pushing seat (1331) and works in sliding cooperation with the moving spring mechanism (131); the support structure (136) is provided with a support surface (1362) arranged apart from the moving spring mechanism (131); and the support surface (1362) can support the moving spring mechanism (131) on the path along which the moving spring mechanism (131) moves away from the static contact point (141).

Description

High voltage DC relay

Related applications

This application claims priority to Chinese patent application No. 2024108318764, filed on June 25, 2024, entitled "High Voltage DC Relay", the entire contents of which are incorporated herein by reference.

Technical Field

This application relates to the field of relay technology, and in particular to a high-voltage DC relay.

Background Technology

High-voltage DC relays, as a new type of automatic electrical switch, can achieve normally open or normally closed states through electromagnetic holding force. Current high-voltage DC relays typically include an electromagnetic component, a moving component, and stationary contacts. The moving contact on the moving spring of the moving component and the stationary contact together form the contact part of the high-voltage DC relay. The electromagnetic component includes a coil, a first iron core, and a second iron core. When the coil is energized, it magnetizes the second iron core, causing the second iron core to attract the first iron core, thus driving the moving component closer to the stationary contact until the moving contact on the moving component and the stationary contact on the stationary contact make contact, achieving circuit continuity. However, in current high-voltage DC relays, when a short circuit or overload occurs, the moving and stationary contacts can spring apart due to electrodynamic repulsion, causing arcing between them and leading to relay damage. In industries such as the new energy sector, which use high-voltage circuits, the demand for miniaturized and short-circuit resistant high-voltage DC relays is increasing.

Summary of the Invention

According to various embodiments of this application, a high-voltage DC relay is provided.

A high-voltage DC relay, comprising:

Insulating cover;

A stationary contact, having a stationary contact point, is fixed relative to the insulating cover, and the side of the stationary contact facing away from the stationary contact point protrudes outside the insulating cover; and,

The moving component includes a pushing mechanism, a moving spring mechanism, an elastic element, and a bracket. The pushing mechanism includes a pushing seat, a pushing rod connected to the pushing seat, and a support structure. The moving spring mechanism is located on the side of the support structure facing away from the pushing seat and has a moving contact opposite to the stationary contact. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic element. The bracket is connected to the pushing seat and is slidably engaged with the moving spring mechanism.

The support structure has a support surface spaced apart from the moving spring mechanism. The support surface is used to support the moving spring mechanism on the path in which the moving spring mechanism moves away from the stationary contact when a short-circuit current causes the moving contact and the stationary contact to spring apart.

Details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects, and advantages of the invention will become apparent from the specification, drawings, and claims.

Attached Figure Description

To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

Figure 1 is a schematic diagram of the structure of the high voltage DC relay in the initial state in some embodiments.

Figure 2 is a schematic diagram of the moving component in the high-voltage DC relay shown in Figure 1.

Figure 3 is an explosion diagram of the moving component shown in Figure 2.

Figure 4 is a schematic diagram of the high-voltage DC relay shown in Figure 1 in the first state.

Figure 5 is a schematic diagram of the high-voltage DC relay shown in Figure 1 in the second state.

Figure 6 is a schematic diagram of the high-voltage DC relay shown in Figure 1 in the third state.

Figure 7 is a structural schematic diagram of the moving component shown in Figure 2 from another angle.

Figure 8 is a schematic diagram of the structure of a moving assembly in some embodiments, where the moving reed includes two sub-reeds.

Figure 9 is a structural schematic diagram of the moving component shown in Figure 8 from another angle.

Detailed Implementation

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

In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

As the application of high-voltage DC relays in various fields becomes increasingly widespread, the industry's requirements for their heat loss resistance, short-circuit protection, and voltage tolerance are also rising. In particular, the current and voltage of circuits using high-voltage DC relays are increasing. For example, in new energy vehicles, as the required driving range increases, the capacity of battery packs is also increasing, leading to higher current and voltage requirements for the high-voltage DC relays used in the battery pack circuits. Consequently, when the circuit is short-circuited or overloaded, the electrodynamic repulsion force generated between the moving and stationary contacts of the high-voltage DC relay is significant. This can easily cause the moving and stationary contacts to spring apart by a large distance. For instance, if the moving spring mechanism compresses the elastic element to its limit, the impact force is transmitted to the push base and electromagnetic assembly. Excessive impact force can cause the electromagnetic assembly, moving assembly, and stationary contacts to detach entirely, damaging the high-voltage DC relay. Alternatively, if the distance between the moving and stationary contacts is too great, excessive heat generated by arcing between them can burn out the high-voltage DC relay, or even cause it to explode. However, in traditional high-voltage DC relays, to increase the holding force of the electromagnetic component on the moving component, so as to avoid the electromagnetic component being unable to hold the stationary contact due to insufficient holding force or to reduce the spring-off distance between the moving and stationary contacts, it is usually necessary to increase the number of coil windings. This leads to an increase in the cost and size of the electromagnetic component, and thus increases the size and cost of the high-voltage DC relay.

In view of the above problems, this application provides a high-voltage DC relay.

Please refer to Figures 1, 2, and 3. Figure 1 is a structural schematic diagram of the high-voltage DC relay 10 in some embodiments, Figure 2 is a structural schematic diagram of the moving component 13 in some embodiments, and Figure 3 is an exploded schematic diagram of the moving component 13 in other embodiments. In some embodiments, the high-voltage DC relay 10 includes a base 11, an electromagnetic component 12, a moving component 13, stationary contacts 14, and an insulating cover 142. The insulating cover 142 is disposed on the base 11, and the stationary contacts 14 are disposed on the insulating cover 142. There may be two stationary contacts 14, and each of the two stationary contacts 14 has a stationary contact point 141. The moving component 13 includes a moving spring mechanism 131, an elastic element 132, and a pushing mechanism 133. The moving spring mechanism 131 has two moving contacts 1313 opposite to the two stationary contacts 141. The moving spring mechanism 131 is elastically connected to the pushing mechanism 133 through the elastic element 132. The electromagnetic component 12 is mounted on the base 11 and can be driven by the pushing mechanism 133 to move the entire moving component 13 toward or away from the stationary contact 141, so that the moving contact 1313 contacts or disengages from the stationary contact 141. It is understood that the high-voltage DC relay 10 can be used as a switching element in a circuit. The stationary contact 14 can be provided with leads electrically connected to the two stationary contacts 141, and these leads are electrically connected to the circuit. When the moving contact 1313 contacts the stationary contact 141, the moving contact 1313 conducts through the two stationary contacts 141, thus completing the circuit. At this time, the high-voltage DC relay 10 is open. When the moving contact 1313 disengages from the stationary contact 141, the two stationary contacts 141 are electrically isolated, the circuit is broken, 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) covering the insulating cover 142 and the stationary contact 14. The stationary contact 14 can be led out to the outside of the housing through conductive structures such as electrodes and leads to be electrically connected to the circuit. The material of the housing includes, but is not limited to, insulating materials such as plastic. The housing can isolate the stationary contact 14, the insulating cover 142 and the moving component 13 from the outside world to achieve insulation protection.

The high-voltage DC relay 10 provided in this application helps reduce manufacturing costs and shrink size. It also effectively supports the moving spring mechanism 131, reduces the distance between the moving contact 1313 and the stationary contact 141 to decrease heat generated by arcing, and prevents the moving component 13 and the electromagnetic component 12 from detaching from the stationary contact 141, thus avoiding damage to the high-voltage DC relay 10. The high-voltage DC relay 10 provided in this application can be used in circuits with high current, such as circuits with operating currents below 8kA. The high-voltage DC relay 10 includes, but is not limited to, applications in battery pack circuits of new energy vehicles. It can also be used as a switching element in circuits of any other suitable equipment, which will not be elaborated upon in this application.

In some embodiments, the pushing mechanism 133 includes a pushing seat 1331 and a pushing rod 1332 connected to the side of the pushing seat 1331 facing away from the moving spring mechanism 131. The electromagnetic component 12 may include an upper iron core 121, a lower iron core 122, and a coil arranged around the upper iron core 121 and the lower iron core 122. The upper iron core 121 is fixedly disposed on the base 11, and the lower iron core 122 and the coil may be disposed within the base 11. The pushing rod 1332 passes through the upper iron core 121 and is inserted into the lower iron core 122, and the pushing rod 1332 is slidably engaged with the upper iron core 121. When the coil is energized, it can magnetize the upper iron core 121 and the lower iron core 122, causing the upper iron core 121 and the lower iron core 122 to attract each other, causing the lower iron core 122 to move toward the upper iron core 121, thereby driving the pushing rod 1332 to drive the entire moving component 13 toward the stationary contact 141.

In some embodiments, the moving assembly 13 further includes a bracket 135, which is connected to the push seat 1331 and slidably engaged with the moving spring mechanism 131. For example, the bracket 135 may include two first arms 1351 and one second arm 1357. The two first arms 1351 are located on opposite sides of the elastic element 132 and the moving spring mechanism 131 in the axial direction, and are both directly or indirectly connected to the push seat 1331. The two ends of the second arm 1357 are respectively connected to the two first arms 1351 and are located on the side of the moving assembly 13 away from the push seat 1331. The two first arms 1351 slidably engage with the moving spring mechanism 131 on opposite sides, allowing the moving spring mechanism 131 to move relative to the push seat 1331 in a direction closer to or farther from the stationary contact 141, thereby causing elastic deformation of the elastic element 132. The sliding limit function of the two first arms 1351 on the moving spring mechanism 131 can provide guidance for the movement of the moving 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 moving spring mechanism 131 away from the push seat 1331 on the side of the moving spring mechanism 131 facing the stationary contact 141, preventing the moving spring mechanism 131 from disengaging from the push seat 1331 and improving the performance stability of the high voltage DC relay 10.

Furthermore, in some embodiments, the pushing mechanism 133 further includes a support structure 136 disposed on the side of the pushing seat 1331 facing the moving spring mechanism 131, and the side of the support structure 136 facing the moving spring mechanism 131 forms a support surface 1362. The support surface 1362 is located between the moving spring mechanism 131 and the pushing seat 1331, and is spaced apart from the moving spring mechanism 131 and the pushing seat 1331. The support surface 1362 can support the moving spring mechanism 131 on the path in which the moving spring mechanism 131 moves toward the pushing seat 1331. In this application, the state in which the moving contact 1313 and the stationary contact 141 are spaced apart, and the electromagnetic component 12 does not apply force to the pushing rod 1332, that is, the high voltage DC relay 10 disconnects the circuit, is called the initial state. In the initial state, the support surface 1362 is spaced apart from the moving spring mechanism 131. When the moving contact 1313 and the stationary contact 141 need to be brought into contact to conduct the circuit, the lower iron core 122 of the electromagnetic component 12 moves towards the upper iron core 121. This, in turn, drives the pushing mechanism 133 via the pushing rod 1332, which in turn drives the moving spring mechanism 131 towards the stationary contact 141, thus giving the moving component 13 a first state and a second state. Referring to Figures 4 and 5, when the moving component 13 moves to the first state, the moving contact 1313 is in contact with 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. That is, during the process of the pushing mechanism 133 driving the moving spring mechanism 131 towards the stationary contact 141 to switch from the initial state to the first state, the moving spring mechanism 131, the bracket 135, the elastic element 132, and the pushing mechanism 133 move synchronously.

After the electromagnetic component 12 drives the moving spring mechanism 131 to the first state via the pushing mechanism 133, the electromagnetic component 12 continues to drive the pushing mechanism 133 to move towards the stationary contact 141 to the second state. During the transition from the first state to the second state, since the moving contact 1313 is in contact with the stationary contact 141 and the moving contact 1313 and the stationary contact 141 are relatively fixed, and the pushing mechanism 133 continues to move towards the stationary contact 141, the distance between the pushing seat 1331 and the moving spring mechanism 131 will decrease. That is to say, during the transition from the first state to the second state, the moving spring mechanism 131 and the pushing seat 1331 are relatively close, and the moving spring mechanism 131 and the pushing seat 1331 will squeeze the elastic element 132, causing the length of the elastic element 132 to decrease and the elastic element 132 to undergo elastic deformation. It is understandable that in both the first and second states, the moving contact 1313 is in contact with the stationary contact 141. The elastic force exerted by the elastic element 132 on the moving contact 1313 is greater in the second state than in the first state. The setting of the second state allows the elastic element 132 to press the moving contact 1313 against the stationary contact 141, improving the stability and reliability of the contact between the moving contact 1313 and the stationary contact 141. At the same time, the elastic element 132 can cooperate with the electromagnetic component 12 to counteract the electric repulsion between the moving contact 1313 and the stationary contact 141, which helps to reduce the holding force requirement of the high-voltage DC relay 10 on the electromagnetic component 12, and helps to reduce the cost and volume of the electromagnetic component 12.

It is understandable that during the transition from the initial state to the first state, and during the transition from the first state to the second state, the lower iron core 122 gradually approaches the upper iron core 121. In the first state, the lower iron core 122 and the upper iron core 121 are spaced apart. In the second state, the lower iron core 122 can just make contact with the upper iron core 121, which is beneficial to enhance the magnetic attraction between the upper iron core 121 and the lower iron core 122, thereby enhancing the holding force of the electromagnetic component 12 on the moving component 13.

In some embodiments, the position of the support surface 1362 between the push seat 1331 and the moving spring mechanism 131 is designed such that, in the second state, the support surface 1362 remains spaced apart from the moving spring mechanism 131, and the distance between the moving spring mechanism 131 and the support surface 1362 is smaller in the second state than in the first state. Furthermore, the distance between the support surface 1362 and the push seat 1331 is greater than the ultimate compression length of the elastic element 132. That is, in the second state, the difference between the length of the elastic element 132 and its ultimate compression length is greater than the distance between the moving spring mechanism 131 and the support surface 1362. The length of the elastic element 132 can be equal to the distance between the moving spring mechanism 131 and the push seat 1331. Referring to Figure 6, it can be understood that when the circuit is short-circuited or overloaded, taking a current exceeding 8kA as an example, the electrodynamic repulsion between the moving contact 1313 and the stationary contact 141 is greater than the elastic force exerted by the elastic element 132 on the moving contact 1313 and the holding force of the electromagnetic component 12. The moving contact 1313 springs away from the stationary contact 141, causing the moving component 13 to move towards the push seat 1331 and further compress the elastic element 132 until the moving component 13 abuts against the support surface 1362. The support surface 1362 provides support to the moving component 13, preventing it from moving further towards the push seat 1331. In this application, the state where the support surface 1362 abuts against the moving component 13 to provide support is called the third state of the moving component 13. In the third state, the moving spring mechanism 131, the bracket 135, and the push mechanism 133 are relatively fixed, and the electromagnetic component 12 bears the impact force of the moving spring mechanism 131.

It is understandable that the support surface 1362 of the moving component 13 only contacts the moving spring mechanism 131 in the third state to provide support. In other states, the support surface 1362 will not interfere with the movement of the moving spring mechanism 131. This helps to avoid the setting of the support surface 1362 causing other types of interference to the movement of the moving spring mechanism 131, such as sliding fit or limit fit, which would increase the risk of the moving spring mechanism 131 getting stuck, uneven force, or wear and scraping. While providing support, it also helps to maintain the structural reliability of the moving component 13 and has little impact on the contact reliability of the moving component 13.

The aforementioned high-voltage DC relay 10 has a support structure 136 for the push mechanism 133, which has a support surface 1362 that can support the moving spring mechanism 131 on the path of the moving spring mechanism 131 moving toward the push mechanism 133. When the circuit connected to the high-voltage DC relay 10 is short-circuited or overloaded, the moving contact 1313 and the stationary contact 141 of the stationary contact 14 of the moving spring mechanism 131 are sprang apart due to electric repulsion. The moving spring mechanism 131 can first compress the elastic element 132 until the support surface 1362 supports the moving spring mechanism 131 so that the moving spring mechanism 131 and the push mechanism 133 are relatively fixed. Since the electric repulsion between the moving contact 1313 and the stationary contact 141 disappears after the moving contact 1313 and the stationary contact 141 spring open, the elastic element 132 can effectively buffer the kinetic energy of the moving spring mechanism 131 as it moves away from the stationary contact 141 to the support surface 1362. Moreover, the elastic element 132 will not be compressed to its maximum compression length. This ensures that when the support surface 1362 supports the moving spring mechanism 131, the impact of the moving spring mechanism 131 on the pushing mechanism 133 and the electromagnetic component 12 will not be too great. This avoids damage to the high-voltage DC relay 10 caused by the moving component 13 and the electromagnetic component 12 being completely separated from the stationary contact 14 due to excessive impact. Furthermore, the support surface 1362 supports the moving spring mechanism 131 so that the moving spring mechanism 131 will no longer move away from the stationary contact 141. The distance between the moving spring mechanism 131 and the push seat 1331 is still greater than the limit compression length of the elastic element 132, which helps to reduce the relative spring-off distance between the moving contact 1313 and the stationary contact 141. Combined with the buffer of the elastic element 132, it can prevent the moving component 13 from detaching from the stationary contact 14, so that the distance between the moving contact 1313 and the stationary contact 141 will not be too far. This helps to avoid the arcing phenomenon between the moving contact 1313 and the stationary contact 141, which generates excessive heat and causes the high voltage DC relay 10 to be damaged or even explode. Furthermore, the buffering effect of the elastic element 132 on the moving spring mechanism 131 can also reduce the holding force requirement of the moving component 13 on the electromagnetic component 12, so that the iron core of the electromagnetic component 12 can support the entire moving component 13 with a smaller holding force. This is beneficial to reducing the number of coil 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.

In some embodiments, the elastic element 132 is disposed between the push seat 1331 and the moving spring mechanism 131, with both ends abutting against the moving spring mechanism 131 and the push seat 1331 respectively. The two ends of the elastic element 132 can be connected to the moving spring mechanism 131 and the push seat 1331 respectively. This arrangement allows for a reasonable spatial layout between the moving spring mechanism 131, the elastic element 132, and the push mechanism 133, resulting in a more compact structure. This improves the space utilization efficiency of the moving assembly 13 and also helps to keep the elastic element 132 relatively far away from the contact position of the moving contact 1313 and the stationary contact 141, reducing the impact of high temperature and ablation spatter on the elastic element 132, and reducing the assembly difficulty of the elastic element 132 with other components. Understandably, when the support surface 1362 is located between the moving spring mechanism 131 and the push seat 1331, the support surface 1362 is farther away from the contact position of the moving contact 1313 and the stationary contact 141. This also helps to reduce the impact of high temperature and ablation spatter on the support surface 1362. For example, it can prevent the distance between the support surface 1362 and the moving spring mechanism 131 from being reduced due to spatter, which would affect the switching from the second state to the third state.

Therefore, in the process of switching from the second state to the third state, the aforementioned high-voltage DC relay 10 first buffers the impact of the moving spring mechanism 131 through the elastic element 132, and then the electromagnetic component 12 bears the impact of the moving spring mechanism 131. This helps to reduce the holding force required by the electromagnetic component 12, and helps to reduce the cost and size of the electromagnetic component 12. At the same time, it can also reduce the spring-opening distance between the moving contact 1313 and the stationary contact 141, thereby reducing the heat generated by the arcing phenomenon. The high-voltage DC relay 10 can achieve the effects of small size, low cost, and high resistance to short-circuit current and voltage.

In some embodiments, as shown in Figures 5 and 7, the moving spring mechanism 131 includes a moving spring 1311 and a lower armature 1314 fixedly connected to the moving spring 1311. The high-voltage DC relay 10 also includes an upper armature 143 opposite to the lower armature 1314. The moving contact 1313 is located on the side of the moving spring 1311 facing the stationary contact 14. The upper armature 143 and the lower armature 1314 together form a short-circuit protection 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 on the bracket 135 and located on the side of the moving spring 1311 facing away from the push seat 1331. The upper armature 143 can also be provided on the stationary contact 14. For example, the high voltage DC relay 10 includes an insulating cover 142, a stationary contact 14 and an upper armature 143. The insulating cover 142 covers the moving assembly 13 and is provided on the base 11. The stationary contact 14 and the upper armature 143 are both fixedly provided on the insulating cover 142. The stationary contact 14 faces away from the moving spring mechanism 131, that is, the side facing away from the stationary contact 141 protrudes out of the outside of the insulating cover 142. When the moving contact 1313 and the stationary contact 141 come into contact, the magnetic field generated by the moving contact 1313 and the stationary contact 141 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 moving contact 1313 and the stationary contact 141. This helps to reduce the holding force required for the electromagnetic component 12, and also helps to reduce the cost and size of the electromagnetic component 12.

In some embodiments, when the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 can be disposed corresponding to the stationary contact 141 and located between the insulating cover 142 and the moving spring 1311. In this case, the upper armature 143 can also limit the moving spring mechanism 131 on the side of the moving spring mechanism 131 facing away from the push seat 1331, limiting the moving spring mechanism 131 to the extreme position away from the push seat 1331. Thus, when the upper armature 143 is disposed on the insulating cover 142, the support 135 of the moving assembly 13 can omit the second support arm 1357, and only two first supports 1351 are provided to connect to the push seat 1331 and are located on the opposite sides of the moving spring mechanism 131. Of course, when the upper armature 143 is mounted on the insulating cover 142, the upper armature 143 and the moving spring 1311 can also be separated by the second arm 1357 of the bracket 135, and the second arm 1357 limits the moving spring mechanism 131 to the extreme position away from the push seat 1331.

Referring to Figures 5 and 6, when the high-voltage DC relay 10 is equipped with a short-circuit ring structure, the support surface 1362 can be directly opposite either the lower armature 1314 or the moving spring 1311, as long as it can abut against either the upper armature 143 or the moving spring 1311 on the path of the moving spring mechanism 131 moving towards the push seat 1331, thus providing support for the moving spring mechanism 131. Of course, the moving assembly 13 can also be provided with multiple support surfaces 1362, with each support surface 1362 directly opposite the moving spring 1311 and the upper armature 143 respectively. The support surface 1362 can simultaneously abut against both the moving spring 1311 and the upper armature 143, thereby achieving a more stable and reliable support for the moving assembly 13. In some embodiments, the moving component 13 has at least two support surfaces 1362, located on opposite sides of the elastic element 132 in the axial direction. These support surfaces can simultaneously face either the moving spring 1311 or the upper armature 143, or they can face both the moving spring 1311 and the upper armature 143 respectively. By providing at least two opposing support surfaces 1362 simultaneously at multiple positions to achieve uniformly distributed support for the moving spring mechanism 131, and in conjunction with the guiding effect of the bracket 135 on the moving spring mechanism 131, the stability and reliability of the movement of the moving spring mechanism 131 relative to the push seat 1331 can be improved, preventing the moving spring mechanism 131 from swaying. Alternatively, the short-circuit ring structure can be omitted, in which case the two sides of the moving spring 1311 can respectively abut against the second arm 1357 and the elastic element 132.

It is understandable that when the upper armature 143 is mounted on the bracket 135, for example, on the second arm 1357 and located between the second arm 1357 and the movable spring 1311, 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 towards the push seat 1331 relative to the first state, the upper armature 143 and the lower armature 1314 are spaced apart. However, when the upper armature 143 is mounted on the insulating cover 142, if the lower armature 1314 is in contact with the upper armature 143 in the first state, then in the second state, the upper armature 143 and the lower armature 1314 are also spaced apart. In other embodiments, the high-voltage DC relay 10 may also mount an upper armature 143 via a carrier structure additionally disposed on the base 11 to fix the upper armature 143 between the insulating cover 142 and the lower armature 1314, provided that the upper armature 143 and the lower armature 1314 can attract each other in the first and second states to provide a holding force for the contact between the moving contact 1313 and the stationary contact 141.

In this application, the sliding engagement between the first arm 1351 and the moving spring mechanism 131 can be described as follows: the two opposite sides of the lower armature 1314 can be in sliding engagement with the surfaces opposite to the two first arms 1351; the two opposite sides of the moving spring 1311 can be in sliding engagement with the two first arms 1351; or a portion of the moving spring 1311 or the lower armature 1314 can be inserted into and slidably disposed on the first arm 1351, as long as the first arm 1351 can provide guidance and limiting function for the movement of the moving spring mechanism 131 relative to the push seat 1331.

In some embodiments, the bracket 135 can be directly connected to the push seat 1331, and the moving component 13 can also include a fixing piece 134 connected to the bracket 135 and the push seat 1331, through which the bracket 135 is indirectly connected to the push seat 1331. It should be noted that in this application, the formation structure and formation position of the support surface 1362 are not limited, as long as it can provide support for the moving component 13 on the path of the moving component 13 moving towards the push seat 1331. The following are some embodiments of the push mechanism 133 forming the support surface 1362.

Referring again to Figures 1, 2, and 3, in some embodiments, the support structure 136 is arranged around the elastic element 132 and has multiple grooves 1361 facing the moving spring mechanism 131. The multiple grooves 1361 are arranged sequentially at intervals along the circumference of the elastic element 132. The support structure 136 is located between two adjacent grooves 1361, and the portion facing the moving spring mechanism 131 forms a support surface 1362. That is, the sides of two adjacent grooves 1361 are connected through the support surface 1362. The multiple grooves 1361 can avoid structures such as the lower armature 1314, so that the support surface 1362 and the two ends of the moving spring 1311 outside the lower armature 1314 are directly opposite each other, so as to accommodate the layout of each element of the moving assembly 13. At the same time, it helps to reduce the material consumption of the support structure 136 and reduce the manufacturing cost of the moving assembly 13.

In some embodiments, the support structure 136 is provided with four support surfaces 1362. The four support surfaces 1362 are arranged sequentially at intervals in the circumferential direction of the elastic element 132, and each pair is directly opposite to one end of the movable spring 1311 located outside the upper armature 143. By providing uniform support to both ends of the movable spring 1311, it is beneficial to improve the structural reliability of the moving assembly 13.

Of course, in some other embodiments not shown in the figures, when the support structure 136 is arranged around the elastic element 132, the support structure 136 may also form a support surface 1362 surrounding the elastic element 132. The support surface 1362 is generally annular, and the support surface 1362 can abut against the lower armature 1314 to support the moving spring mechanism 131. The annular support surface 1362 provides multi-directional contact with the moving spring mechanism 131, which can further improve the structural reliability of the moving assembly 13.

In this application, the support structure 136 can be integrally formed with the push seat 1331 and the push rod 1332, and the push mechanism 133 as a whole can be made of plastic material, which is simple to manufacture and helps to reduce manufacturing costs.

Referring to Figures 8 and 9, in some embodiments, the moving spring 1311 may include two sub-springs 1312 arranged side-by-side and spaced apart. When the moving spring mechanism 131 is provided with a lower armature 1314, the lower armature 1314 can be connected to both sub-springs 1312 simultaneously. The lower armature 1314 may also include two spaced-apart sub-armatures, with each sub-armature corresponding to one of the two sub-springs 1312. Each moving contact 1313 of the moving spring 1311 can be formed by the corresponding positions of the two sub-springs 1312. With this arrangement, the two sub-springs 1312 can provide more stable electrical contact, reduce poor contact caused by wear or damage to a single spring, share the mechanical load of the moving contact 1313, reduce the stress of a single spring, improve the durability of the high-voltage DC relay 10, provide a more uniform current distribution, reduce arcing and contact resistance, and improve electrical contact performance. Furthermore, when one of the sub-springs 1312 fails, the other sub-spring 1312 can still control the on/off circuit with the stationary contact 141, improving the performance reliability of the high-voltage DC relay 10. Of course, in any other embodiment where the support surface 1362 is formed in other components or positions, the moving spring 1311 can be a single unit, or two sub-springs 1312 can be provided, as long as it does not affect the supporting effect of the support surface 1362 on the moving spring mechanism 131, which will not be elaborated here.

In this application, the elastic element 132 is not limited to any suitable elastic component such as a spring or compression spring. The connection and orientation of the elastic element 132 with the moving spring mechanism 131 and the pushing mechanism 133 are also not limited, as long as the elastic cooperation between the moving spring mechanism 131 and the pushing mechanism 133 can be achieved, so as to buffer the moving spring mechanism 131 during the transition from the second state to the third state.

The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims (15)

A high-voltage DC relay, comprising: Insulating cover; A stationary contact, having a stationary contact point, is fixed relative to the insulating cover, and the side of the stationary contact facing away from the stationary contact point protrudes outside the insulating cover; and, The moving component includes a pushing mechanism, a moving spring mechanism, an elastic element, and a bracket. The pushing mechanism includes a pushing seat, a pushing rod connected to the pushing seat, and a support structure. The moving spring mechanism is located on the side of the support structure facing away from the pushing seat and has a moving contact opposite to the stationary contact. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic element. The bracket is connected to the pushing seat and is slidably engaged with the moving spring mechanism. The support structure has a support surface spaced apart from the moving spring mechanism. The support surface is used to support the moving spring mechanism on the path in which the moving spring mechanism moves away from the stationary contact when a short-circuit current causes the moving contact and the stationary contact to spring apart. According to claim 1, the high-voltage DC relay is provided with the support structure surrounding the elastic element, and the support structure forms the support surface on the side facing the moving spring mechanism. According to claim 2, the high-voltage DC relay is wherein the support surface is arranged around the elastic element. According to claim 2, the high voltage DC relay is provided with a plurality of grooves facing the moving spring mechanism, the plurality of grooves are arranged sequentially at intervals along the circumference of the elastic element, and the sidewalls of two adjacent grooves are connected through the support surface. According to claim 1, the high-voltage DC relay is wherein the push base, the push rod, and the support structure are integrally formed. According to claim 1, the high-voltage DC relay, wherein the pushing mechanism can drive the moving spring mechanism to move towards the stationary contact, so that the moving component has a first state and a second state. In the first state, the moving contact is in contact with the stationary contact. In the second state, the moving contact is pressed against the stationary contact by the elastic element. The moving spring mechanism is spaced apart from the support surface. During the switching process from the first state to the second state, the pushing mechanism moves relative to the moving spring mechanism towards the stationary contact. The distance between the moving spring mechanism and the support surface is smaller in the second state than in the first state. According to claim 6, 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 moving spring mechanism and the support surface. According to claim 6, the high voltage DC relay is wherein the moving contact can spring away from the stationary contact under the action of electric repulsion to switch from the second state to the third state, wherein in the third state, the supporting surface abuts against the moving spring mechanism so that the moving spring mechanism is relatively fixed to the pushing mechanism, and the length of the elastic element is greater than the ultimate compression length. According to claim 6, the high voltage DC relay includes a lower armature and a moving spring that are relatively fixed, the moving contact is located on the side of the moving spring facing the stationary contact, and the supporting surface is opposite to the lower armature, and/or the supporting surface is opposite to the moving spring. According to claim 9, the high voltage DC relay further includes an upper armature opposite to the lower armature, and when the moving contact and the stationary contact are in contact, the upper armature and the lower armature can attract each other, and the upper armature is disposed on the bracket. According to claim 9, the high voltage DC relay further includes an upper armature opposite to the lower armature, and when the moving contact and the stationary contact are in contact, the upper armature and the lower armature can attract each other. The upper armature is disposed outside the moving assembly and is fixed relative to the stationary contact. According to the high voltage DC relay of claim 10, when the upper armature is disposed on the bracket, in the first state, the upper armature and the lower armature are in contact, and in the second state, the upper armature and the lower armature are spaced apart. According to any one of claims 1-12, the high-voltage DC relay further includes a base and an electromagnetic assembly, the electromagnetic assembly and the stationary contact are disposed on the base, the pushing mechanism includes a pushing seat connected to the fixed plate and a pushing rod disposed on the side of the pushing seat facing away from the moving spring mechanism, the pushing rod is inserted into the electromagnetic assembly, and the electromagnetic assembly is used to drive the pushing seat to move toward or away from the stationary contact through the pushing rod. According to claim 13, the high-voltage DC relay is wherein the elastic element is disposed between the push base and the moving spring mechanism, and its two ends abut against the moving spring mechanism and the push base respectively. According to claim 13, the high-voltage DC relay, wherein the support surface is located between the moving spring mechanism and the push seat, and is spaced apart from the moving spring mechanism and the push seat.