A relay for a charging post

Abstract

The application relates to a relay for a charging pile, which comprises a shell, two power connection terminals, two load connection terminals, a relay assembly, a leakage mutual inductor and a current mutual inductor, the two power connection terminals and the two load connection terminals are fixedly arranged in the shell; the relay assembly is arranged in the shell, the relay assembly comprises a contact component and a magnetic circuit component, the two power connection terminals are connected with the two load connection terminals through the contact component to form two on-off control circuits, the two on-off control circuits are used for forming a loop with a load connected to the two load connection terminals, and the magnetic circuit component is used for controlling the on-off state of the contact component; the leakage mutual inductor is arranged in the shell and is used for sensing the on-off state of the two on-off control circuits, and the current mutual inductor is arranged in the shell and is used for sensing the current passing state of one on-off control circuit. The application has the effect of better integration of the relay.

Description

Technical Field

[0001] This application relates to the field of relays, and more particularly to a relay for use in charging piles. Background Technology

[0002] A relay is an electrical control device that has an interactive relationship between the control system (also known as the input circuit) and the controlled system (also known as the output circuit). In fact, it is an "automatic switch" that uses a small current to control a large current. It plays a role in automatic adjustment, safety protection, and circuit switching in the circuit.

[0003] When customers use this technology in electric vehicle charging guns or charging stations, they often install a relay switch only on the live wire, while neglecting to install a relay switch on the neutral wire. This can lead to issues like the switch sticking together and failing to disconnect, resulting in low reliability and safety. Furthermore, strict adherence to the live / neutral wire wiring is crucial; reversing the wires creates a direct current flow, posing a risk of electric shock. Additionally, current transformers are required for power detection. Current technology uses separate components for the relay and current transformer, connected via a PCB board or wires. This results in a complex structure, low integration, hindering miniaturization, inconvenient installation, and limited automation. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, this application provides a relay for a charging pile.

[0005] The relay for charging piles provided in this application adopts the following technical solution:

[0006] A relay for a charging pile includes a housing, two power terminals, two load terminals, a relay assembly, a leakage current transformer, and a current transformer, wherein the two power terminals and the two load terminals are fixedly disposed in the housing.

[0007] The relay assembly is disposed in the housing. The relay assembly includes a contact component and a magnetic circuit component. Each of the two power terminals forms two on / off control circuits with the two load terminals through the contact component. The two on / off control circuits are used to form a loop with the load connected to the two load terminals. The magnetic circuit component is used to control the on / off state of the contact component.

[0008] The leakage current transformer is installed in the housing and is used to sense the continuity or short circuit status of the two on / off control circuits. The current transformer is installed in the housing and is used to sense the current flow status of one on / off control circuit.

[0009] Optionally, the contact component includes two moving springs, two moving contacts, two normally open contacts, two relay terminals, and two normally closed contacts. One end of each of the two moving springs is fixed and electrically connected to the two power supply terminals, and the two moving contacts are fixed and electrically connected to the two moving springs.

[0010] The two normally open contacts are respectively fixed and electrically connected to the two load terminals;

[0011] Both of the relay terminals are fixedly mounted on the housing, and the two normally closed contacts are respectively fixed and electrically connected to the two relay terminals;

[0012] When the magnetic circuit component operates to make the two on / off control circuits conduct, the two moving contacts respectively abut against and are electrically connected to the two normally open contacts; when the magnetic circuit component stops operating to make the two on / off control circuits disconnect, the two moving springs reset and respectively drive the two moving contacts to abut against and be electrically connected to the two normally closed contacts.

[0013] Optionally, both relay terminals are L-shaped, the housing has two fixing slots, and the housing is fixedly provided with multiple fixing protrusions. The right-angled ends of the two relay terminals are respectively inserted and fixedly provided in the two fixing slots, and the other right-angled ends of the two relay terminals are provided with multiple fixing grooves. Each fixing protrusion is respectively inserted and engaged with each fixing groove.

[0014] Optionally, the movable spring includes two horizontal portions and a protruding portion, with the two horizontal portions respectively fixedly disposed at both ends of the protruding portion.

[0015] Optionally, the movable spring further includes a folding portion, which is fixedly connected to one of the horizontal portions, and the movable contact is disposed on the folding portion.

[0016] Optionally, the contact component further includes a connecting block, which is non-conductive, and its two ends are respectively connected to the two moving springs.

[0017] Optionally, the magnetic circuit component further includes an electromagnetic yoke, a magnetic circuit armature, and a magnetic circuit drive frame. The electromagnetic yoke is fixedly mounted on the housing, the magnetic circuit armature is rotatably engaged with the electromagnetic yoke, and the magnetic circuit drive frame is rotatably connected to the housing. One side of the magnetic circuit drive frame abuts against the magnetic circuit armature, and the magnetic circuit drive frame is used to control the passage or disconnection of the contact component.

[0018] Optionally, the electromagnetic yoke is fixedly provided with multiple fixed pins and two coil pins, the housing is provided with multiple fixed holes and two pin slots, each of the fixed pins is respectively inserted into each of the fixed holes, the two coil pins are respectively inserted into the two pin slots, the two coil pins are provided with through pin holes, and the two coil pins of the electromagnetic yoke are respectively inserted into the two pin holes.

[0019] Each of the fixed pins and the two coil pins are fixedly provided with a fixing buckle, and each fixing buckle is in contact with the housing.

[0020] Optionally, a debris groove is provided at one end of the coil pin, and the debris groove is connected to the pin hole.

[0021] Optionally, one or more arc-shaped protrusions are fixedly provided on one side of the magnetic circuit drive frame.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] When the charging pile charges the car, the charging relay operates. The two power terminals are connected to the neutral / live wires of the input circuit, and the two load terminals are connected to the neutral / live wires of the output circuit. The magnetic circuit component drives the contact components to remain conductive, thus activating the on / off control circuit. When a short circuit occurs in the car, the leakage current transformer detects the short circuit signal and transmits it to external protective devices such as air switches and fuses. This disconnects the input or output circuit, providing protection. If the external air switch or fuse fails to disconnect the input or output circuit, the magnetic circuit component stops driving, causing the contact components to stop conducting and disconnecting the two on / off control circuits, thus protecting the circuit. Electrical appliances can provide dual protection for circuits. In addition, the leakage current transformer also has the function of detecting the adhesion of the contact components themselves, thereby further improving the installation of relays. Furthermore, since the current transformer can sense the current flow of a control circuit during car charging, it can collect the charging status of the car during the charging process, thus realizing the metering function. When the current transformer is combined with the corresponding software of the charging pile, it can realize functions such as quantitative charging and remote power off. In summary, the relay has better integration, which improves the shortcomings of the existing technology, where the relay and current transformer are independent components connected by PCB boards or wires, resulting in complex structure, low integration, difficulty in miniaturization, inconvenience for customer installation, and inconvenience for automation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the internal structure of the shell according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the overall structure of the relay assembly according to an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the contact component structure according to an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the relay terminal structure according to an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the relay terminal installation according to an embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the moving spring structure according to an embodiment of this application;

[0031] Figure 8 This is a schematic diagram of the magnetic circuit component structure according to an embodiment of this application;

[0032] Figure 9 This is a schematic diagram of the electromagnetic yoke structure according to an embodiment of this application;

[0033] Figure 10 This is a schematic diagram of the installation of the electromagnetic module according to an embodiment of this application;

[0034] Figure 11 This is a schematic diagram of the magnetic circuit drive frame structure according to an embodiment of this application;

[0035] Figure 12 This is a schematic diagram of the flow channel structure in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Fixing groove; 111. Fixing part; 111a. European standard part; 111b. Chinese standard part; 12. Fixing protrusion; 13. Fixing hole; 14. Pin groove; 15. Guide groove; 2. Power supply terminal; 3. Load terminal; 4. Relay assembly; 41. Contact component; 411. Moving spring; 4111. Horizontal part; 4112. Protrusion; 4113. Folding part; 412. Moving contact; 413. Normally open contact; 414. Relay Electrical terminals; 4141, fixing groove; 415, normally closed contact; 416, connecting block; 42, magnetic circuit components; 421, electromagnetic yoke; 4211, snap-fit ​​groove; 4212, fixing pin; 4213, coil pin; 42131, pin hole; 42132, debris groove; 4214, fixing buckle; 422, magnetic circuit armature; 423, magnetic circuit drive frame; 4231, arc protrusion; 424, magnetic circuit spring; 5, leakage current transformer; 6, current transformer. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0038] This application discloses a relay for a charging pile. (See also...) Figure 1 and Figure 2 A relay for a charging pile includes a housing 1, two power supply terminals 2, two load terminals 3, a relay assembly 4, a leakage current transformer 5, and a current transformer 6.

[0039] Reference Figure 2 and Figure 3 The two power supply terminals 2 and the two load terminals 3 are fixedly installed on the housing 1. The relay assembly 4 is installed on the housing 1. The relay assembly 4 includes a contact component 41 and a magnetic circuit component 42. The two power supply terminals 2 are connected to the two load terminals 3 through the contact component 41 to form two on / off control circuits. The two on / off control circuits are used to form a loop with the load connected to the two load terminals 3. The magnetic circuit component 42 is used to control the on / off state of the contact component 41.

[0040] Reference Figure 2 In this embodiment, both the leakage current transformer 5 and the current transformer 6 are hollow rings. The leakage current transformer 5 is disposed in the housing 1 and is used to sense the continuity or short circuit of the two on / off control circuits. Specifically, both power supply terminals 2 are passed through the leakage current transformer 5 to facilitate the leakage current transformer 5 to sense the short circuit of the input or output circuit. The current transformer 6 is disposed in the housing 1 and is used to sense the current flow of an on / off control circuit. Specifically, a load terminal 3 is passed through the current transformer 6 to facilitate the current transformer 6 to measure the current flow of the output circuit, so as to collect the charging status of the vehicle.

[0041] Reference Figure 3 and Figure 4 In this embodiment, the contact component 41 includes two movable springs 411, two movable contacts 412, two normally open contacts 413, two relay terminals 414, and two normally closed contacts 415. One end of each of the two movable springs 411 is fixed and electrically connected to two power supply terminals 2, and the two movable contacts 412 are fixed and electrically connected to the two movable springs 411. The two normally open contacts 413 are fixed and electrically connected to two load terminals 3. The two relay terminals 414 are fixedly disposed on the housing 1, and the two normally closed contacts 415 are fixed and electrically connected to the two relay terminals 414.

[0042] When the magnetic circuit component 42 operates to conduct the two on / off control circuits, that is, when the two power supply terminals 2 are electrically connected to the two load terminals 3 respectively, the two moving contacts 412 abut against and are electrically connected to the two normally open contacts 413 respectively; when the magnetic circuit component 42 stops operating to disconnect the two on / off control circuits, that is, when the two power supply terminals 2 are disconnected from the two load terminals 3 respectively, the two moving springs 411 reset and respectively drive the two moving contacts 412 to abut against and be electrically connected to the two normally closed contacts 415 respectively, so that the two power supply terminals 2 are electrically connected to the two relay terminals 414 respectively; when the relay does not perform on / off operation, the output circuit can also be electrically connected to the two relay terminals 414, so that the two power supply terminals 2 and the two relay terminals 414 form a normally closed circuit, at which time only the leakage current transformer 5 of the relay operates.

[0043] Reference Figure 5 and Figure 6 In a further embodiment, both relay terminals 414 are L-shaped. The housing 1 has two fixing grooves 11 and two fixing protrusions 12. The right-angle ends of the two relay terminals 414 are respectively inserted and fixedly installed in the two fixing grooves 11, and the other right-angle ends of the two relay terminals 414 have a fixing groove 4141. The two fixing protrusions 12 are respectively inserted and engaged with the two fixing grooves 4141, so that the two relay terminals 414 are subjected to two fixing forces in mutually perpendicular directions, thereby improving the stability of the fixed connection between the two relay terminals 414 and the housing 1.

[0044] Reference Figure 5 and Figure 6 In a further embodiment, the fixing groove 11 includes a plurality of fixing parts 111, each fixing part 111 having a different vertical distance from the fixing protrusion 12, so that when the relay terminal 414 passes through different fixing parts 111, the vertical distance between the normally open contact 413 and the normally closed contact 415 is different. In this embodiment, the number of fixing parts 111 is set to two, one fixing part 111 is a European standard part 111a, and the other fixing part 111 is a Chinese standard part 111b, so that when the relay terminal 414 passes through a European standard part 111a, the vertical distance between the normally closed contact 415 and the normally open contact 413 meets the European standard for charging piles of more than 3mm, and when the relay terminal 414 passes through a Chinese standard part 111b, the vertical distance between the normally closed contact 415 and the normally open contact 413 meets the new Chinese standard for charging piles of more than 1.5mm, thereby making the housing 1 more adaptable during assembly.

[0045] Reference Figure 7In a further embodiment, the movable spring 411 includes two horizontal portions 4111, a protrusion 4112, and a folded portion 4113. The two horizontal portions 4111 are respectively fixedly disposed at both ends of the protrusion 4112. The protrusion 4112 has an arc-shaped structure to improve the reset and rebound performance of the movable spring 411 and to allow the movable spring 411 to adapt to different vertical distances between normally closed contacts 415 and normally open contacts 413. The folded portion 4113 is fixedly connected to one of the horizontal portions 4111, and the movable contact 412 is disposed on the folded portion 4113. The folded portion 4113 is formed by folding one end of the horizontal portion 4111 at least once, so that the movable spring 411 can adapt to short-circuit currents of 2000A / 1000A and can provide better heat dissipation for the movable contact 412 during continuous charging, thereby extending the service life of the relay.

[0046] Reference Figure 4 In this embodiment, the contact component 41 further includes a connecting block 416. The connecting block 416 does not have conductive properties. Both ends of the connecting block 416 are connected to two moving springs 411 respectively, so that when the magnetic circuit component 42 drives the two moving springs 411, the synchronization between the two moving springs 411 is better, and the on / off time interval between the two on / off control circuits is within 1 millisecond, thereby making the on / off control time synchronization between the two on / off control circuits better.

[0047] Reference Figure 3 , Figure 8 as well as Figure 9 In this embodiment, the magnetic circuit component 42 includes an electromagnetic yoke 421, a magnetic circuit armature 422, and a magnetic circuit drive frame 423. The electromagnetic yoke 421 is fixedly mounted on the housing 1. The magnetic circuit armature 422 has an L-shaped structure and a snap-fit ​​groove 4211. The magnetic circuit armature 422 has a right-angled end (e.g., Figure 8 and Figure 3 The horizontal right-angled end in the view) is located at the bottom of the electromagnetic yoke 421, and the other right-angled end of the magnetic circuit armature 422 (as shown in the image) is located at the bottom of the electromagnetic yoke 421. Figure 8 and Figure 9The vertical right-angled end (in the view) rotates and engages with the engaging slot 4211, allowing the magnetic armature 422 and the electromagnetic yoke 421 to be movably connected. For example, the vertical right-angled end of the magnetic armature 422 has grooves on both sides, and the corresponding sides of the engaging slot 4211 have engaging blocks. The two engaging blocks are respectively movably engaged in the two grooves of the right-angled side. Thus, the movable engaging point of the two forms the rotation fulcrum of the magnetic armature 422, so that when the electromagnetic yoke 421 exerts a magnetic attraction on the vertical right-angled end, the right-angled end can rotate toward the electromagnetic yoke 421. The magnetic circuit armature 422 is magnetically connected to the battery module 421. When the vertical right-angle end rotates toward the battery module 421, the horizontal right-angle end of the magnetic circuit armature 422 rotates downward. One end of the electromagnetic yoke 421 is provided with a 2mm diameter protrusion for abutting and engaging with the magnetic circuit armature 422. This reduces the contact area between the magnetic circuit armature 422 and the electromagnetic yoke 421 when they are magnetically fixed together, thereby reducing friction and the possibility of generating plastic debris when the magnetic circuit armature 422 and the electromagnetic yoke 421 are magnetically fixed together.

[0048] One end of the magnetic circuit drive frame 423 (such as Figure 3 The left end in the view) is rotatably connected to the housing 1, and the other end of the magnetic circuit drive frame 423 (as shown) Figure 3 The upper side of the magnetic circuit drive frame 423 (on the right end in the view) abuts against the horizontal right-angle end of the magnetic circuit armature 422, and the lower side of the other end of the magnetic circuit drive frame 423 abuts against the two moving springs 411. That is, the magnetic circuit drive frame 423 abuts between the magnetic circuit armature 422 and the two moving springs 411, so that when the magnetic circuit component 42 is driven, the electromagnetic yoke 421 magnetically attracts and fixes the vertical right-angle end of the magnetic circuit armature 422, that is, the vertical right-angle end faces the electromagnetic yoke 421, thereby driving the magnetic circuit drive frame 422 to abut against the magnetic circuit armature 422. The horizontal right-angle end of the armature 422 rotates downward, thereby pushing the magnetic circuit drive frame 423 to rotate downward. The magnetic circuit drive frame 423 rotates downward to push the two moving springs 411 to swing downward, so that the two moving contacts 412 are electrically connected to the two normally closed contacts 415 respectively, and then the two moving contacts 412 are electrically connected to the two normally open contacts 413 respectively, thereby making the two on / off control circuits conduct. At this time, the two moving springs 411 are pressed by the magnetic circuit drive frame 423 to produce elastic deformation. When the electromagnetic yoke 421 has no magnetic attraction to the vertical right-angle end of the magnetic circuit armature 422, the vertical right-angle end of the magnetic circuit armature 422 is no longer under force. The horizontal right-angle end of the magnetic circuit armature 422 rotates upward under the elastic force of the two moving springs 411. The vertical right-angle end of the magnetic circuit armature 422 is disengaged from the battery module 421. The two moving springs 411 are reset so that the two moving contacts 412 are electrically connected to the two normally closed contacts 415 respectively, thereby breaking the two on / off control circuits.

[0049] Furthermore, the magnetic circuit drive frame 423 is rotatably connected to the housing 1, which improves the mechanical life of the relay and reduces the amount of debris generated by friction between the magnetic circuit drive frame 423 and the housing 1 when the magnetic circuit drive frame 423 is driven, thereby improving the stability of the relay operation.

[0050] Reference Figure 8 In a further embodiment, the magnetic circuit component 42 further includes a magnetic circuit spring 424, which is elastic. Figure 9 As shown, optionally, the middle of the horizontal right-angle end of the magnetic armature 422 is hollowed out. One end of the magnetic spring 424 is fixed to the bottom of the electromagnetic yoke 421, and the other end of the magnetic spring 424 extends from the hollowed-out part of the horizontal right-angle end of the magnetic armature 422 and abuts against the vertical right-angle end of the magnetic armature 422. When the electromagnetic yoke 421 does not exert a magnetic attraction on the magnetic armature 422, the magnetic armature 422 exerts pressure on the magnetic spring 424 to cause the magnetic spring 424 to undergo elastic deformation. When the magnetic armature 422 and the electromagnetic yoke 421 are magnetically attracted and fixed, the magnetic spring 424 recovers its elastic deformation to move with the magnetic armature 422 and maintain abutment against the magnetic armature 422, thereby maintaining the magnetic attraction and fixation between the magnetic armature 422 and the electromagnetic yoke 421, thus improving the conduction stability of the two on / off control circuits.

[0051] Reference Figure 9 and Figure 10 In a further embodiment, the electromagnetic yoke 421 is fixedly provided with multiple fixing pins 4212 and two coil pins 4213. The housing 1 has multiple fixing holes 13 and two pin slots 14. Each fixing pin 4212 passes through each fixing hole 13, and the two coil pins 4213 pass through the two pin slots 14. The two coil pins 4213 have through pin holes 42131, and the two coil pins of the electromagnetic yoke 421 pass through the two pin holes 42131. Each fixing pin 4212 and the two coil pins 4213 are fixedly provided with fixing buckles 4214. Each fixing buckle 4214 abuts against the housing 1 to improve the stability of the fixed connection between the electromagnetic yoke 421 and the housing 1, while reducing the cost of automated relay assembly.

[0052] Reference Figure 9 and Figure 10 In a further embodiment, a debris groove 42132 is provided at one end of the coil pin 4213. The debris groove 42132 is connected to the pin hole 42131 so that when the coil pin of the electromagnetic yoke 421 is inserted into the pin hole 42131 and plastic debris is generated, the plastic debris will stay in the debris groove 42132, thereby reducing the impact of debris generated during relay assembly on the relay performance.

[0053] Reference Figure 11 In a further embodiment, two arc-shaped protrusions 4231 are fixedly provided on one side of the magnetic circuit drive frame 423. The two arc-shaped protrusions 4231 respectively abut against and cooperate with the two moving springs 411, so that the magnetic circuit drive frame 423 has a better driving effect on the two moving springs 411.

[0054] Reference Figure 12 In this embodiment, a guide groove 15 is provided at the bottom of the housing 1, thereby increasing the stability of the connection between the two power supply terminals 2, the two load terminals 3 and the two coil pins 4213 and the housing 1, thus making the relay work more stable.

[0055] The implementation principle of a relay for a charging pile in this application embodiment is as follows: When the charging pile charges a car, the relay operates, with the two power supply terminals 2 connected to the neutral / live wires of the input circuit, and the two load terminals 3 connected to the neutral / live wires of the output circuit. The magnetic circuit component 42 is driven to keep the contact component 41 conductive, thereby making the on / off control circuit conductive. When a short circuit occurs in the car, the leakage current transformer 5 detects the short circuit signal and transmits it to the external protection devices such as air switches and fuses, thereby disconnecting the input or output circuit and providing protection. When the external protection devices such as air switches and fuses cannot disconnect the input or output circuit, the magnetic circuit component 42 stops driving, thereby stopping the contact component 41. The relay prevents conduction, thereby disconnecting the two on / off control circuits and protecting the circuit. This allows the relay to provide dual protection for the circuit. In addition, when the car is charging, the current transformer 6 can sense the current flow of one on / off control circuit, enabling it to collect the charging status of the car and thus achieve metering. When the current transformer 6 is combined with the corresponding software of the charging pile, it can realize functions such as quantitative charging and remote power-off. In summary, the relay has better integration and improves the shortcomings of the existing technology, where the relay and current transformer 6 are independent components connected by a PCB board or wires, resulting in a complex structure, low integration, difficulty in miniaturization, inconvenience for customer installation, and inconvenience for automation.

[0056] The relays in this application embodiment are mainly used in charging piles, but can also be used in other fields that require the use of relays, and are not limited to charging piles.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A relay for a charging pile, characterized in that: It includes a housing, two power terminals, two load terminals, a relay assembly, a leakage current transformer, and a current transformer. The two power terminals and the two load terminals are all fixedly installed in the housing. The relay assembly is disposed in the housing. The relay assembly includes a contact component and a magnetic circuit component. Each of the two power terminals forms two on / off control circuits with the two load terminals through the contact component. The two on / off control circuits are used to form a loop with the load connected to the two load terminals. The magnetic circuit component is used to control the on / off state of the contact component. The leakage current transformer is installed in the housing and is used to sense the continuity or short circuit status of the two on / off control circuits. The current transformer is installed in the housing and is used to sense the current flow status of one on / off control circuit.

2. A relay for a charging pile according to claim 1, characterized in that: The contact component includes two moving springs, two moving contacts, two normally open contacts, two relay terminals, and two normally closed contacts. One end of each of the two moving springs is fixed and electrically connected to the two power supply terminals, and the two moving contacts are fixed and electrically connected to the two moving springs. The two normally open contacts are fixed and electrically connected to the two load terminals respectively; Both of the relay terminals are fixedly mounted on the housing, and the two normally closed contacts are respectively fixed and electrically connected to the two relay terminals; When the magnetic circuit component operates to make the two on / off control circuits conduct, the two moving contacts respectively abut against and are electrically connected to the two normally open contacts; when the magnetic circuit component stops operating to make the two on / off control circuits disconnect, the two moving springs reset and respectively drive the two moving contacts to abut against and be electrically connected to the two normally closed contacts.

3. A relay for a charging pile according to claim 2, characterized in that: Both relay terminals are L-shaped. The housing has two fixing slots and multiple fixing protrusions. The right-angled ends of the two relay terminals are respectively inserted and fixed in the two fixing slots. The other right-angled ends of the two relay terminals have multiple fixing grooves. Each fixing protrusion is inserted and engaged with each fixing groove.

4. A relay for a charging pile according to claim 2, characterized in that: The movable spring includes two horizontal parts and a protruding part, with the two horizontal parts fixedly disposed at both ends of the protruding part.

5. A relay for a charging pile according to claim 4, characterized in that: The movable spring also includes a folding portion, which is fixedly connected to a horizontal portion, and the movable contact is disposed on the folding portion.

6. A relay for a charging pile according to claim 2, characterized in that: The contact component also includes a connecting block, which is non-conductive, and its two ends are respectively connected to the two moving springs.

7. A relay for a charging pile according to claim 1, characterized in that: The magnetic circuit component also includes an electromagnetic yoke, a magnetic circuit armature, and a magnetic circuit drive frame. The electromagnetic yoke is fixedly mounted on the housing, and the magnetic circuit armature is rotatably engaged with the electromagnetic yoke. The magnetic circuit drive frame is rotatably connected to the housing, and one side of the magnetic circuit drive frame abuts against the magnetic circuit armature. The magnetic circuit drive frame is used to control the passage or disconnection of the contact component.

8. A relay for a charging pile according to claim 7, characterized in that: The electromagnetic yoke is fixedly provided with multiple fixed pins and two coil pins. The housing is provided with multiple fixed holes and two pin slots. Each fixed pin is respectively inserted into each fixed hole. The two coil pins are respectively inserted into the two pin slots. The two coil pins are provided with through pin holes. The two coil pins of the electromagnetic yoke are respectively inserted into the two pin holes. Each of the fixed pins and the two coil pins are fixedly provided with a fixing buckle, and each fixing buckle is in contact with the housing.

9. A relay for a charging pile according to claim 8, characterized in that: A debris groove is provided at one end of the coil pin, and the debris groove is connected to the pin hole.

10. A relay for a charging pile according to claim 7, characterized in that: One or more arc-shaped protrusions are fixedly installed on one side of the magnetic circuit drive frame.

Images