Relay and electrical system
By designing a disconnection module in the relay, the safety hazard caused by the sticking of high-voltage DC relay contacts is solved by using triggering and cutting elements to automatically disconnect the conductive connection, thus achieving safe and reliable circuit control.
Patent Information
- Application Number
- CN202520086386.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-14
AI Technical Summary
When existing high-voltage DC relays are operated to open or close, a high-voltage arc is generated between the contacts, causing welding. This results in the moving contact and the stationary contact sticking together, making it impossible to disconnect normally and posing a safety hazard.
Design a relay that includes a housing, a conductive connector, and a disconnect module. A trigger pushes a disconnect component to move along a guide to disconnect the conductive connector, thereby breaking the circuit and avoiding manual operation while the circuit is energized.
The circuit is automatically disconnected when the contacts stick together, reducing safety hazards and improving the safety and ease of maintenance of the relay.
Smart Images
Figure CN223743559U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of relays, in particular, to a relay and an electrical system. BACKGROUND
[0002] The relay is a commonly used electrical component, wherein the high-voltage DC relay is mainly used for on-off control of the high-voltage loop to realize control of the high-voltage loop by the low-voltage.
[0003] In the prior art, when the high-voltage DC relay is used, the relay drives the contact to move by using the coil magnetized iron core, thereby controlling the closing and opening of the high-voltage loop.
[0004] However, during the long-term use, when the relay is operated, high-voltage arc is generated between the contacts of the relay, and a large amount of heat is generated at the moment, which causes the fusion welding phenomenon between the static contact and the moving contact, thereby causing the adhesion between the moving contact and the static contact, which causes the relay to be unable to be normally opened. At this time, the operator needs to manually cut off the high-voltage loop, which has a great safety hazard. CONTENT OF THE INVENTION
[0005] The purpose of the present application is to provide a relay and an electrical system, which can solve the safety hazard problem caused by the fact that the moving contact and the static contact of the relay in the prior art cannot be effectively disconnected when the adhesion occurs.
[0006] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a relay, which comprises a shell, a conduction connecting piece and a disconnection module. The shell is internally formed with an accommodating cavity. The conduction connecting piece is arranged in the accommodating cavity, and the conduction connecting piece is connected in series in the current loop of the relay. The disconnection module is at least partially arranged in the accommodating cavity, and the disconnection module comprises a guide piece, a cutting piece and a triggering piece. The cutting piece is slidingly arranged in the guide piece, and the triggering piece can drive the cutting piece to move along the guide piece. Wherein, when the cutting piece moves along the guide piece, the cutting piece can abut against the conduction connecting piece and cut off the conduction connecting piece.
[0007] Based on the above-mentioned embodiments of the present application, when the relay is normally used, the relay is connected in the circuit, and the disconnection and conduction of the circuit are realized by the opening and closing of the static contact and the moving contact in the relay. In this process, the conduction connecting piece is connected in series in the circuit. When the static contact and the moving contact are fused due to the high-temperature and high-voltage arc generated in the opening and closing process, the triggering piece drives the cutting piece to move along the guide piece, the cutting piece abuts against the conduction connecting piece and cuts off the conduction connecting piece, thereby causing the circuit to be disconnected. Through the above-mentioned arrangement of the present application, the circuit can be disconnected when the contacts of the relay are adhered by the arrangement of the disconnection module, which is convenient for the subsequent maintenance and replacement of the relay, avoids the safety hazard caused by the live operation during the maintenance of the relay, and improves the safety of the relay.
[0008] In some embodiments, the trigger comprises a powder cartridge, the guide is a piston rod, the piston rod is arranged in the shell and is opposite the conducting connector, the cutting-off member is slidingly arranged at one end of the piston rod close to the conducting connector, the powder cartridge is arranged at one end of the piston rod away from the conducting connector, and the powder cartridge is connected with a trigger wire.
[0009] Based on the above embodiments of the present application, a specific implementation of the disconnection module is provided, the trigger is specifically arranged as a powder cartridge, and remote control ignition of the powder cartridge is realized through the trigger wire. When adhesion occurs between the moving contact and the static contact of the relay, the powder cartridge is ignited by the trigger wire, energy generated by the ignition of the powder cartridge is gathered in the piston rod and pushes the cutting-off member to move along the piston rod, and then the conducting connector is cut off by the impact force when the cutting-off member contacts the conducting connector, so that the current loop of the relay is disconnected. By specifically arranging the trigger as a powder cartridge, sufficient impact force can be ensured when triggering, and the integration level of the disconnection module is improved, the space occupation is reduced, and installation is facilitated.
[0010] In some embodiments, the conducting connector is provided with a weak groove, and the weak groove is arranged on the side of the conducting connector away from the disconnection module.
[0011] Based on the above embodiments of the present application, by arranging the weak groove on the conducting connector, the strength of the local part of the conducting connector can be reduced, so that the conducting connector can be more easily broken when impacted by the cutting-off member. At the same time, by arranging the weak groove on the side of the conducting connector away from the disconnection module, the conducting connector can be more easily broken when impacted, so that the disconnection module can more easily disconnect the circuit of the relay when triggered.
[0012] In some embodiments, the conducting connector is provided with at least two weak grooves, and the end of the cutting-off member close to the conducting connector is formed with two cutter portions, and the two cutter portions are opposite the two weak grooves.
[0013] Based on the above embodiments of the present application, when a single weak groove is arranged on the conducting connector, when the conducting connector is impacted, the conducting connector needs to be broken at the center of the weak groove, and the parts on both sides of the weak groove need to be bent at the same time, which requires a large impact force. When two or more weak grooves are arranged on the conducting connector, and two cutter portions are formed at the end of the cutting-off member, when the cutting-off member impacts the conducting connector, the parts between the two weak grooves opposite the two cutter portions have weak grooves on both sides, so that the parts are easily broken, and after the parts are broken, the conducting connector can be completely disconnected, which to some extent avoids the problem that the parts formed by the broken conducting connector are mutually overlapped, causing the circuit to be unable to be completely disconnected.
[0014] In some embodiments, the weak groove is provided as a V-shaped groove, and the cutter part is provided as a V-shaped structure towards one end of the through connection piece.
[0015] Based on the above embodiments of the present application, by providing the weak groove as a V-shaped groove, compared with a rectangular groove or an arc-shaped groove, the V-shaped groove structure is more likely to cause stress concentration when the through connection piece is impacted, so that the cutting piece is more likely to cut off the through connection piece to achieve the disconnection of the circuit. By providing the cutter part as a V-shaped structure towards one end of the through connection piece, the contact area between the cutting piece and the through connection piece is smaller, thereby increasing the pressure intensity locally received by the through connection piece, and further making the cutting piece more likely to cut off the through connection piece to disconnect the relay circuit.
[0016] In some embodiments, the relay includes two static contacts and two dynamic contacts, the two dynamic contacts move together and can respectively contact and conduct with the two static contacts, the two static contacts are used to connect and conduct with the current circuit, and the through connection piece is connected between the two dynamic contacts.
[0017] Based on the above embodiments of the present application, when the relay is used, the two static contacts and the two dynamic contacts are connected to form a current circuit, the current can flow from one static contact, then pass through the dynamic contact in contact with it to the through connection piece, and then pass through the through connection piece to the other dynamic contact, and then flow out from the other static contact through the contact between the dynamic contact and the static contact. In this process, the through connection piece is connected in series in the circuit, and when the through connection piece is disconnected by the impact of the cutting piece, the circuit will also be disconnected, thereby cutting off the current flowing through the relay.
[0018] In some embodiments, the disconnection module and the static contact are located on the same side of the dynamic contact, and the movement direction of the cutting piece is consistent with the movement direction of the dynamic contact.
[0019] Based on the above embodiments of the present application, by arranging the disconnection module and the static contact on the same side of the dynamic contact, when the dynamic contact and the static contact are adhered, the cutting piece moves and impacts the through connection piece, the impact force is transmitted to the dynamic contact through the through connection piece, and the impact force direction is consistent with the direction in which the dynamic contact moves away from the static contact at this time. Therefore, during the movement and impact of the cutting piece on the through connection piece, there is a certain possibility that the dynamic contact and the static contact directly separate, at this time, the effect of cutting off the current circuit of the relay can also be achieved, thereby further improving the safety of the relay.
[0020] In some embodiments, a gap is provided between the two dynamic contacts, and the weak groove is formed in the gap.
[0021] Based on the above embodiments of the present application, by forming a gap between the two dynamic contacts, sufficient space is provided for deformation and fracture of the through connection piece when it is impacted.
[0022] According to a second aspect of the present application, an electrical system is provided, which comprises the relay described above, and the relay is connected in series with two static contacts in the electrical system.
[0023] Based on the above-mentioned embodiments of the present application, the electrical system provided by the present application comprises the relay described above. When the electrical system and the relay are working normally, the current loop of the electrical system flows in from one static contact, then flows to the conducting connection through the movable contact in contact with the static contact, and then flows out from the other static contact through the contact between the movable contact and the static contact. When the static contact and the movable contact of the relay are stuck together, the cutting member moves under the pushing of the triggering member and impacts and cuts the conducting connection between the two movable contacts, so that the connection between the two movable contacts is disconnected, and the circuit of the relay is completely disconnected, thereby avoiding live operation when the relay is maintained and replaced by the worker, and reducing the safety risk.
[0024] In some embodiments, the electrical system further comprises a power supply management module, which is electrically connected with the triggering wire.
[0025] Based on the above-mentioned embodiments of the present application, the current situation, resistance situation and temperature situation in the relay of the electrical circuit are detected by the power supply management system to determine whether the movable contact and the static contact of the relay are stuck together. When the contacts of the relay are stuck together, the power supply management module controls the triggering wire to ignite the powder cartridge, and then pushes the cutting member to impact and cut the conducting connection, thereby realizing automatic control and further improving the safety of the relay.
[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0027] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation of the present application. In the drawings:
[0028] Figure 1 is a cross-sectional view of the relay provided by the embodiments of the present application.
[0029] Figure 2 is a structural schematic view of the disconnection module in the relay provided by the embodiments of the present application.
[0030] Figure 3 is a structural schematic view of the cutting member in the relay provided by the embodiments of the present application.
[0031] Figure 4 is a structural schematic view of the conducting connection in the relay provided by the embodiments of the present application.
[0032] Figure 5 Figure 1 is a structural schematic diagram of a moving contact mounting seat and a moving contact in a relay provided by an embodiment of the present application.
[0033] Explanation of reference signs
[0034] 1, housing; 11, accommodating cavity; 2, on connection; 21, weak groove; 3, off module; 31, powder cartridge; 32, cutting member; 321, cutter part; 33, piston rod; 34, trigger wire; 4, static contact; 41, moving contact; 5, moving iron core; 6, moving contact mounting seat; 7, reset spring; 71, pole piece; 8, coil; 9, mandrel. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.
[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.
[0037] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.
[0038] It should be noted that: similar reference signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0039] In the description of the present application, it should be noted that, without making the opposite statement, the orientation or position relationship indicated by the terms "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0040] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements. 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.
[0041] The relay is a commonly used electrical element, in which the high-voltage DC relay is mainly used for on-off control of the high-voltage loop to realize the control of the high-voltage loop by the low-voltage. In the prior art, when the high-voltage DC relay is used, the relay drives the contact to move by using the magnetized iron core, thereby controlling the closing and opening of the high-voltage loop.
[0042] However, during the long-term use, when the relay is operated, high-voltage arc will be generated between the contacts of the relay, and at the same time, a large amount of heat will be generated instantaneously, resulting in the fusion welding phenomenon between the static contact and the moving contact, thereby causing the adhesion between the moving contact and the static contact, resulting in the failure of the relay to normally open. At this time, the operator needs to manually maintain and replace the relay, and cut off the high-voltage circuit, but due to the adhesion of the contacts, the circuit still remains connected during the operation of the operator, resulting in the need for the operator to operate under the condition of live line, which has a great safety hazard.
[0043] In order to solve the above problems in the prior art, according to the first aspect of the present application, a relay is provided, as shown in Figure 1 and Figure 2 The relay includes a housing 1, a conducting connecting piece 2 and a disconnecting module 3. The housing 1 is internally formed with an accommodating cavity 11. The conducting connecting piece 2 is arranged in the accommodating cavity 11, and the conducting connecting piece 2 is connected in series in the current loop of the relay. The disconnecting module 3 is at least partially arranged in the accommodating cavity 11, and the disconnecting module 3 includes a guide piece, a cutting piece 32 and a triggering piece. The cutting piece 32 is slidingly arranged in the guide piece, and the triggering piece can push the cutting piece 32 to move along the guide piece. Wherein, the cutting piece 32 can abut against and cut off the conducting connecting piece 2 when moving along the guide piece.
[0044] Based on the above-mentioned embodiments of the present application, when the relay is normally used, the relay is connected to the circuit, and the opening and closing of the circuit are realized by the opening and closing of the static contact 4 and the movable contact 41 in the relay. In this process, the conduction connecting piece 2 is connected in series in the circuit. When the static contact 4 and the movable contact 41 are welded due to the high-temperature and high-voltage arc generated in the opening and closing process, the trigger member drives the cutting member 32 to move along the guide member, the cutting member 32 abuts against and cuts off the conduction connecting piece 2, so that the circuit is disconnected. Through the above-mentioned arrangement of the present application, the arrangement of the disconnecting module 3 can control the circuit to be disconnected when the contacts of the relay are stuck, which is convenient for subsequent maintenance and replacement of the relay, avoids the safety hazard caused by live operation when the relay is maintained, and improves the safety of the relay.
[0045] Specifically, the "current loop of the relay" in the present application refers to the main current loop inside the relay when the relay controls the high-voltage loop in normal operation. Specifically, when the relay is used to control the high-voltage loop, the conduction connecting piece 2 is connected in series in the current loop of the relay, that is, the conduction connecting piece 2 is connected in series with the loop composed of the static contact 4 and the movable contact 41. Therefore, when the movable contact 41 and the static contact 4 cannot be disconnected due to sticking, the conduction connecting piece 2 has a technical effect similar to a switch in the circuit at this time. When the conduction connecting piece 2 is normally connected to the circuit, the circuit is normally conducted. When the conduction connecting piece 2 is cut off by the cutting member 32, the circuit is disconnected, thereby disconnecting the current loop of the relay, avoiding the safety problem caused by live operation when the relay is replaced and maintained.
[0046] Further, through the arrangement of the conduction connecting piece 2 in the present application, the connection of the relay loop can be disconnected in a physical way, while in the prior art, in some cases, the protection circuit is arranged to protect the circuit when the relay is stuck. In contrast, the disconnecting module 3 in the present application can be arranged independently of the relay, thereby avoiding the problem that some elements of the protection circuit are burned out and cannot work normally due to high-voltage arc, thereby further reducing the safety risk of the relay in use.
[0047] In addition, it should be noted that the conduction connecting piece 2 in the present application is used to connect to the current loop of the relay and conduct in normal operation, so the conduction connecting piece 2 can be selected from any suitable conduction material in use. In order to make the conduction connecting piece 2 relatively stable when it is impacted by the cutting member 32, the material of the conduction connecting piece 2 is specifically selected to be a material with high brittleness. When specifically selected, a variety of materials including copper alloy can be selected, which is not limited in the present application.
[0048] In the present application, the trigger in the disconnecting module 3 can be arranged in any suitable structure, and the guide and the cutting member 32 can also be adapted to the structure of the trigger.
[0049] Referring to Figure 2 and Figure 3 In an exemplary embodiment provided in the present application, the trigger can be arranged as a powder cartridge 31, at this time the guide can be arranged as a piston rod 33, the piston rod 33 is arranged through the housing 1 and is arranged opposite to the conducting connector 2, the cutting member 32 is arranged slidingly on the piston rod 33 at the end close to the conducting connector 2, the powder cartridge 31 is arranged at the end of the piston rod 33 away from the conducting connector 2, and the powder cartridge 31 is connected with a trigger wire 34.
[0050] Based on the above-mentioned embodiments of the present application, a specific implementation of the disconnecting module 3 is provided, the trigger is specifically arranged as a powder cartridge 31, and the remote control ignition of the powder cartridge 31 is realized through the trigger wire 34. When the movable contact 41 of the relay and the static contact 4 are adhered, the powder cartridge 31 is ignited by the trigger wire 34, the energy generated by the ignition of the powder cartridge 31 is gathered in the piston rod 33 and drives the cutting member 32 to move along the piston rod 33, and then the conducting connector 2 is cut off by the impact force when the cutting member 32 contacts the conducting connector 2, so that the current loop of the relay is disconnected. By specifically arranging the trigger as the powder cartridge 31, sufficient impact force can be ensured when triggering, and the integration degree of the disconnecting module 3 is improved, the space occupation is reduced, and the installation is facilitated.
[0051] Specifically, when the disconnecting module 3 is arranged, the piston rod 33 penetrates through the housing 1 and is fixed on the housing 1, and the end of the piston rod 33 where the powder cartridge 31 is arranged is arranged outside the housing 1, and the end of the cutting member 32 is arranged inside the housing 1 and is arranged opposite to the conducting connector 2. By specifically arranging the trigger as the powder cartridge 31, a small amount of powder can generate a large impact force on the cutting member 32 because a large energy can be exploded when the powder is burned, and then the cutting member 32 is driven to cut off the conducting connector 2, so that the powder cartridge 31 can be arranged smaller to reduce the space occupation of the disconnecting module 3 as a whole. At the same time, in order to ensure the driving effect of the cutting member 32, the sealing effect between the piston rod 33 and the powder cartridge 31 and between the cutting member 32 and the powder cartridge 31 needs to be strengthened, and the strength of the piston rod 33 itself needs to be strengthened, and in specific use, the piston rod 33 can be arranged as a metal hollow rod structure.
[0052] Further, the powder cartridge 31 can be arranged in a U-shaped structure when arranged, and the opening end of the U-shaped structure faces the cutting member 32, so that the energy generated when the powder in the powder cartridge 31 burns can be concentrated in the direction of the cutting member 32, and then the acting force acting on the cutting member 32 is larger.
[0053] Alternatively, in some other embodiments of the present application, the trigger member can also be arranged as a structure such as a hydraulic cylinder or an electric cylinder, which can also be triggered by remote control, and then push the cutting member 32 to move and cut off the conduction connecting member 2. At this time, the guide member can be specifically arranged as a guide groove or a guide rod, and the cutting member 32 is slidingly arranged in the guide groove or on the guide rod. At the same time, when specifically arranged, the size and power of the hydraulic cylinder or the electric cylinder should be arranged according to the impact force required when the cutting member 32 cuts off the conduction connecting member 2.
[0054] Reference Figure 4 As shown in FIG. 1, in some embodiments of the present application, the conduction connecting member 2 can be provided with a weak groove 21, and the weak groove 21 is arranged on the side of the conduction connecting member 2 away from the disconnecting module 3.
[0055] Based on the above embodiments of the present application, by arranging the weak groove 21 on the conduction connecting member 2, the strength of the conduction connecting member 2 can be reduced locally, so that the conduction connecting member 2 can be more easily broken when impacted by the cutting member 32. At the same time, by arranging the weak groove 21 on the side of the conduction connecting member 2 away from the disconnecting module 3, the conduction connecting member 2 can be more easily broken when impacted, and then the disconnecting module 3 can be more easily disconnected when triggered.
[0056] Specifically, the conduction connecting member 2 will be bent and deformed when impacted by the cutting member 32, at this time the conduction connecting member 2 as a whole constitutes an arc-shaped structure, and the arc-shaped protruding direction is away from the disconnecting module 3. At this time, compared to arranging the weak groove 21 on the side close to the disconnecting module 3, arranging the weak groove 21 on the side away from the disconnecting module 3 can cause stress concentration on the arc-shaped protrusion of the conduction connecting member 2 with the weak groove 21 as the center, and then break at the center of the weak groove 21, so that the conduction connecting member 2 can be more easily broken when impacted by the cutting member 32, and then cut off the current loop of the relay.
[0057] Further, in some embodiments of the present application, the conduction connecting member 2 can be provided with at least two weak grooves 21, and the cutting member 32 is formed with two cutter portions 321 close to the conduction connecting member 2, and the two cutter portions 321 are arranged opposite to the two weak grooves 21.
[0058] Based on the above embodiments of the present application, when a single weak groove 21 is provided on the conduction connecting piece 2, when the conduction connecting piece 2 is impacted, the conduction connecting piece 2 needs to be bent on both sides of the weak groove 21 when the weak groove 21 is broken, which requires a large impact force. When two or more weak grooves 21 are provided on the conduction connecting piece 2, and the end of the cutting piece 32 is formed with two cutter portions 321, when the cutting piece 32 impacts the conduction connecting piece 2, the part between the two weak grooves 21 opposite to the two cutter portions 321 has weak grooves 21 on both sides, so this part is prone to breakage, and after the part breaks, the conduction connecting piece 2 can be completely disconnected, which to some extent avoids the problem that the parts formed by the breakage of the conduction connecting piece 2 are mutually overlapped, causing the circuit to be unable to be completely disconnected.
[0059] Specifically, when the conduction connecting piece 2 is provided, since the conduction connecting piece 2 is connected in series in the current loop of the relay, at this time, both ends of the conduction connecting piece 2 need to be connected with other components. Therefore, when a single weak groove 21 is provided on the conduction connecting piece 2, the weak groove 21 divides the conduction connecting piece 2 into two parts, which can be named as a first conduction part and a second conduction part respectively. At this time, when the conduction connecting piece 2 is impacted, the conduction connecting piece 2 is deformed convexly around the weak groove 21, at this time, the first conduction part and the second conduction part need to be bent, and since the ends of the first conduction part and the second conduction part away from the weak groove 21 are connected with other structures respectively, a large impact force is required.
[0060] When two or more weak grooves 21 are provided on the conduction connecting piece 2, at this time, the conduction connecting piece 2 has weak grooves 21 on both sides of multiple regions, at this time, the above-mentioned part is more prone to breakage when impacted, so that the cutting piece 32 can more easily cut off the conduction connecting piece 2 to disconnect the current loop of the relay.
[0061] Reference Figure 3 and Figure 4 As shown in the above embodiments of the present application, the weak groove 21 can be provided as a V-shaped groove, and the end of the cutter portion 321 towards the conduction connecting piece 2 can also be provided as a V-shaped structure.
[0062] Based on the above embodiments of the present application, by providing the weak groove 21 as a V-shaped groove, compared with a rectangular groove or an arc-shaped groove, the V-shaped groove structure is more prone to stress concentration when the conduction connecting piece 2 is impacted, so that the cutting piece 32 can more easily cut off the conduction connecting piece 2 to disconnect the circuit. By providing the end of the cutter portion 321 towards the conduction connecting piece 2 as a V-shaped structure, the contact area between the cutting piece 32 and the conduction connecting piece 2 is smaller, so as to increase the local pressure of the conduction connecting piece 2, and thus the cutting piece 32 can more easily cut off the conduction connecting piece 2 to disconnect the circuit of the relay.
[0063] Specifically, as described in the above embodiments of the present application, when the conducting connecting piece 2 is impacted by the cutting piece 32, the conducting connecting piece 2 will be deformed by bending. When the thin groove 21 is set as a V-shaped groove, stress concentration will occur at the bottom of the V-shaped groove when the conducting connecting piece 2 is deformed by bending, and then the conducting connecting piece 2 will be broken. Compared with the arc-shaped groove or the rectangular groove structure, the conducting connecting piece 2 will be broken by a smaller impact force.
[0064] In the present application, the contact structure in the relay can be selected in any suitable manner.
[0065] Reference Figure 1 In an exemplary embodiment provided in the present application, the relay can include two static contacts 4 and two dynamic contacts 41, the two dynamic contacts 41 move together and can be in contact with the two static contacts 4 respectively, the two static contacts 4 are used to connect and conduct with the current circuit, and the conducting connecting piece 2 is connected between the two dynamic contacts 41.
[0066] Based on the above embodiments of the present application, when the relay is used, the two static contacts 4 and the two dynamic contacts 41 are connected to form a current circuit, the current can flow from one static contact 4, then flow to the conducting connecting piece 2 through the dynamic contact 41 in contact with it, and then flow out from the other static contact 4 through the contact between the dynamic contact 41 and the static contact 4. In this process, the conducting connecting piece 2 is connected in series in the circuit, and when the conducting connecting piece 2 is broken by the impact of the cutting piece 32, the circuit will also be broken, thereby cutting off the current flowing through the relay.
[0067] Further, in the present application, the structure in the relay is not limited to the above structure, and can be selected according to the actual use.
[0068] Reference Figure 1 and Figure 5 As shown in the above embodiments of the present application, in an exemplary embodiment provided in the present application, the housing 1 of the relay can further be provided with a dynamic contact mounting seat 6, a reset spring 7, a magnetic pole piece 71, a coil 8, a core shaft 9, and a dynamic iron core 5.
[0069] In specific use, the two movable contacts 41 are respectively installed on the movable contact mounting seat 6, the movable core 5 is arranged between the coils 8, and the movable core 5 is connected with the movable contact mounting seat 6 through the core shaft 9, and the magnetic pole piece 71 is arranged on the side of the movable core 5 facing the static contact 4. At this time, the reset spring 7 can be arranged as a compression spring or a tension spring, and the reset spring 7 is connected with the movable contact mounting seat 6 or the movable core 5. For example, when the reset spring 7 is arranged as a tension spring, when the coils 8 are powered on during normal operation of the relay, the movable core 5 arranged in the coils 8 is magnetized, at this time, the magnetic pole piece 71 attracts the movable core 5 to move towards the side close to the static contact 4, and then drives the movable contact mounting seat 6 and the movable contact 41 to move towards the static contact 4 through the core shaft 9, so that the static contact 4 and the movable contact 41 are in contact and conductive, and the current loop is in communication, and in this process, the reset spring 7 is stretched. When it is necessary to cut off the current loop, the coils 8 are powered off, at this time, the magnetism of the movable core 5 disappears, the reset spring 7 contracts and drives the movable core 5 and the movable contact mounting seat 6 to reset, so that the movable contact 41 and the static contact 4 are separated from each other, and the current loop is disconnected.
[0070] Reference Figure 1 As shown in the middle of the figure, in some embodiments of the present application, the disconnecting module 3 and the static contact 4 can be located on the same side of the movable contact 41, and the movement direction of the cutting member 32 is consistent with the movement direction of the movable contact 41.
[0071] Based on the above-mentioned embodiments of the present application, by arranging the disconnecting module 3 and the static contact 4 on the same side of the movable contact 41. When the movable contact 41 and the static contact 4 are adhered to each other, the cutting member 32 moves and impacts the conductive connecting member 2, the impact force is transmitted to the movable contact 41 through the conductive connecting member 2, and at this time, the direction of the impact force is consistent with the direction of the movable contact 41 moving away from the static contact 4, so it is also possible for the movable contact 41 to directly separate from the static contact 4 in the process of the cutting member 32 moving and impacting the conductive connecting member 2, at this time, the effect of cutting off the current loop of the relay can also be achieved, thereby further improving the safety of the relay.
[0072] Specifically, when the movable contact 41 and the static contact 4 of the relay are adhered to each other due to high-voltage arc welding, the adhesion strength between the movable contact 41 and the static contact 4 will be different due to different high-voltage arc temperatures and other factors. When the cutting member 32 impacts the conductive connecting member 2, the impact force is transmitted to the movable contact 41 through the connection between the conductive connecting member 2 and the movable contact 41. In some cases, when the adhesion strength between the movable contact 41 and the static contact 4 is low, the movable contact 41 and the static contact 4 may separate due to the impact force before the conductive connecting member 2 is broken, thereby achieving the effect of disconnecting the relay circuit.
[0073] Reference Figure 1 and Figure 5As shown in the above embodiments, in some embodiments of the present application, a gap can be arranged between the two movable contacts 41, and the thin groove 21 is formed in the gap.
[0074] Based on the above embodiments of the present application, by forming the gap between the two movable contacts 41, sufficient space can be left for the deformation and fracture of the through connection 2 when the through connection 2 is impacted.
[0075] On the basis of the above technical solutions, according to the second aspect of the present application, an electrical system is provided, which comprises the above-mentioned relay, and the relay is connected in series through the two static contacts 4 in the electrical system.
[0076] Based on the above embodiments of the present application, the electrical system provided by the present application comprises the above-mentioned relay. When the electrical system and the relay are working normally, the current loop of the electrical system flows from one static contact 4, then flows to the through connection 2 through the movable contact 41 in contact with it, and then flows from the other static contact 4 through the contact between the movable contact 41 and the static contact 4. When the static contact 4 and the movable contact 41 of the relay are adhered, the cutting member 32 is moved under the pushing of the trigger member and impacts and cuts off the through connection 2 between the two movable contacts 41, so that the connection between the two movable contacts 41 is disconnected, and then the circuit of the relay is completely disconnected, so that the live operation can be avoided when the staff maintains and replaces the relay, thereby reducing the safety risk.
[0077] In some embodiments of the present application, the electrical system can further comprise a power supply management module, which is electrically connected with the trigger wire 34.
[0078] Based on the above embodiments of the present application, by setting the power supply management system to detect the current situation, resistance situation and temperature situation in the relay of the circuit, it can be judged whether the movable contact and the static contact of the relay are adhered. When the contacts of the relay are adhered, the power supply management module controls the trigger wire 34 to ignite the powder cartridge 31, and then pushes the cutting member 32 to impact and cut off the through connection 2, so as to realize automatic control and further improve the safety of the relay.
[0079] Specifically, in the process of using the relay, whether the adhesion occurs between the movable contact 41 and the static contact 4 of the relay can be determined by detecting the current in the circuit and the voltage of different parts of the circuit, and at the same time, the generation of high-voltage arc between the static contact 4 and the movable contact 41 of the relay can be determined by temperature detection, and then the possibility of adhesion of the relay can be determined. The specific detection method can be selected according to the actual use, and the present application does not make specific limitations. After the power supply management system detects that the relay has adhesion, the control trigger can be used to push the cutting member 32 to cut off the conducting connecting member 2, thereby breaking the relay current loop.
[0080] Further, in actual use, the specific structure and function of the power supply management system can be set according to the use requirements. For example, when the relay is used in the input and output circuit of the new energy battery, the power supply management system can also be specifically set as a battery management system (BMS) at this time.
[0081] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments. Within the technical concept range of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection range of the present application.
[0082] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present application.
[0083] In addition, various different embodiments of the present application can also be combined in any appropriate manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed in the present application.
Claims
1. A relay characterized by comprising: The relay comprises: a housing, an accommodation cavity is formed in the housing; a conduction connecting piece, which is arranged in the accommodation cavity and connected in series in a current loop of the relay; a disconnecting module, which is arranged at least partially in the accommodation cavity, the disconnecting module comprising a guide piece, a cutting piece and a trigger piece, the cutting piece being slidingly arranged in the guide piece, and the trigger piece being capable of pushing the cutting piece to move along the guide piece; wherein the cutting piece is capable of abutting against the conduction connecting piece and cutting off the conduction connecting piece when the cutting piece moves along the guide piece.
2. The relay according to claim 1, characterized in that The trigger piece is arranged as a powder cartridge, the guide piece is arranged as a piston rod, the piston rod is arranged through the housing and opposite to the conduction connecting piece, the cutting piece is slidingly arranged at one end of the piston rod close to the conduction connecting piece, the powder cartridge is arranged at one end of the piston rod away from the conduction connecting piece, and a trigger wire is connected to the powder cartridge.
3. The relay of claim 1, wherein The conduction connecting piece is provided with a weak groove, and the weak groove is arranged on a side of the conduction connecting piece away from the disconnecting module.
4. The relay according to claim 3, characterized in that The conduction connecting piece is provided with at least two weak grooves, and the cutting piece is formed with two cutter portions at one end close to the conduction connecting piece, and the two cutter portions are arranged opposite to the two weak grooves.
5. The relay of claim 4, wherein The weak groove is arranged as a V-shaped groove, and the cutter portion is arranged as a V-shaped structure at one end facing the conduction connecting piece.
6. The relay according to any one of claims 1 to 5, characterized in that The relay comprises two static contacts and two dynamic contacts, the two dynamic contacts move together and are capable of being in contact with the two static contacts respectively, the two static contacts are used for connecting and conducting with a current circuit, and the conduction connecting piece is connected between the two dynamic contacts.
7. The relay according to claim 6, characterized in that The disconnecting module and the static contacts are located on the same side of the dynamic contacts, and the moving direction of the cutting piece is consistent with the moving direction of the dynamic contacts.
8. The relay of claim 6, wherein A gap is arranged between the two dynamic contacts, and a weak groove is formed in the gap.
9. An electrical system, characterized by The electrical system comprises the relay according to any one of claims 1-8, and the relay is connected in series in the electrical system through the two static contacts.
10. The electrical system of claim 9, wherein, The electrical system further comprises a power supply management module, and the power supply management module is electrically connected with the trigger wire.