Charging line automatic switching device and equipment

Abstract

The utility model belongs to the technical field of equipment charging, and particularly relates to a charging line automatic switching device and equipment. Comprising a circuit switching assembly, and the circuit switching assembly comprises a contactor and a contact module. The contactors comprise a first contactor and a second contactor; the first contactor is connected with the second contactor through a connecting line, and the second contactor is connected with the contact module; the first contactor is connected with an external first power supply; the second contactor is connected with an external second power supply; when an external power supply is connected to the device, the first contactor or the second contactor transmits the corresponding power supply to the contact module through the contact of the first contactor or the second contactor, the output of the power supply is realized through the contact module, and meanwhile, the second contactor or the first contactor is locked through a connecting line of the two contactors. When one contactor works to output power, the other contactor can be locked, so that faults caused by simultaneous access of the two power supplies are avoided, and the safety of the circuit is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of equipment charging technology, specifically relating to an automatic charging line switching device and equipment. Background Technology

[0002] However, it is an objective fact that different regions use different electricity standards, and different charging interface devices may be used under different working conditions. This means that a lot of time needs to be spent distinguishing and identifying when using charging devices. If the identification fails, it may result in the inability to charge, and in severe cases, it may lead to damage to the device.

[0003] Traditional power switching typically relies on manual operation or complex electronic control circuits, which not only increases operational difficulty and maintenance costs but may also fail to provide a rapid response in emergencies. Existing equipment commonly uses charging voltages of 220V (with a single-phase socket) and 380V (with a three-phase socket). When charging with different voltage platforms, the internal charging circuit must be switched to the corresponding voltage platform and the other charging circuit disconnected. Incorrect switching can lead to charging failure, potentially damaging the equipment and threatening personal safety. Utility Model Content

[0004] To address the problem that incorrect switching of charging lines can lead to charging failure, this utility model provides an automatic charging line switching device and equipment.

[0005] In a first aspect, this utility model provides an automatic charging line switching device, including a contact module, a first contactor, and a second contactor; the first contactor is connected to an external first power source, and the second contactor is connected to an external second power source; both the first and second contactors are provided with an inlet contact, an outlet contact, an auxiliary contact, and a coil wiring contact; the outlet contact of the first contactor is connected to the outlet contact of the second contactor, and the outlet contact of the second contactor is connected to the contact module;

[0006] The coil wiring contact of the first contactor is connected to the incoming contact of the first contactor, the coil wiring contact of the first contactor is connected to the auxiliary contact of the second contactor, and the auxiliary contact of the second contactor is connected to the incoming contact of the first contactor; the incoming contact of the first contactor connected to the coil wiring contact of the first contactor and the incoming contact of the first contactor connected to the auxiliary contact of the second contactor are in the same power supply circuit;

[0007] The coil wiring contact of the second contactor is connected to the input contact of the second contactor, and the coil wiring contact of the second contactor is connected to the auxiliary contact of the first contactor; the auxiliary contact of the first contactor is connected to the input contact of the second contactor, and the input contact of the second contactor connected to the coil wiring contact of the second contactor and the input contact of the second contactor connected to the auxiliary contact of the first contactor are in the same power supply circuit.

[0008] As a preferred embodiment of the present invention, the incoming contact of the first contactor is connected to an external first power source, and the incoming contact of the second contactor is connected to an external second power source.

[0009] The incoming contacts include a first incoming contact, a second incoming contact, and a third incoming contact; the outgoing contacts include a first outgoing contact, a second outgoing contact, and a third outgoing contact; the auxiliary contacts include a first auxiliary contact and a second auxiliary contact; and the coil connection contacts include a positive coil connection contact and a negative coil connection contact.

[0010] Each contactor is equipped with multiple contacts connected in a specific manner, enabling more precise control of power input, output, and interlocking between contactors. The input contacts connect to the power supply, the output contacts transmit power, and the auxiliary contacts and coil wiring contacts are used for mutual control between contactors. This connection method, combined with the contact module, ensures that only one contactor operates during power switching, improving system stability and reliability. The contact module, as a critical node for power output, guarantees the safe delivery of power from different contactors to the load.

[0011] As a preferred embodiment of the present invention, the first outgoing contact of the first contactor is connected to the first outgoing contact of the second contactor via a connecting wire, the second outgoing contact of the first contactor is connected to the second outgoing contact of the second contactor via a connecting wire, and the third outgoing contact of the first contactor is connected to the third outgoing contact of the second contactor via a connecting wire; the outgoing contacts of the second contactor are respectively connected to the contact module via connecting wires.

[0012] The positive coil contact of the first contactor is connected to the first input contact of the first contactor, and the negative coil contact of the first contactor is connected to the first auxiliary contact of the second contactor.

[0013] The positive coil contact of the second contactor is connected to the first input contact of the second contactor, and the negative coil contact of the second contactor is connected to the first auxiliary contact of the first contactor.

[0014] The second auxiliary contact of the first contactor is connected to the second incoming contact of the second contactor, and the second auxiliary contact of the second contactor is connected to the second incoming contact of the first contactor.

[0015] The corresponding connections of each outgoing contact, as well as the specific connections of the coil wiring contacts and auxiliary contacts, enable more precise interlocking and control logic between contactors. This sophisticated connection architecture enhances the overall performance and applicability of the automatic charging line switching device.

[0016] As a preferred embodiment of the present invention, the device further includes a waterproof mounting box, and the line switching component is installed inside the waterproof mounting box.

[0017] The waterproof mounting box encapsulates the line switching components, effectively preventing moisture, dust, and other external factors from corroding the internal electrical components and extending the device's lifespan. Simultaneously, it provides a relatively safe and stable working environment for components such as the contact module and contactors, preventing external environmental factors from affecting the normal operation of power switching and ensuring the entire automatic charging line switching device can operate reliably even in harsh environments.

[0018] As a preferred embodiment of the present invention, the waterproof mounting box includes a mounting cover, a mounting shell, and a waterproof connector. The mounting cover is mounted on the mounting shell, and the waterproof connector is mounted on the side of the mounting shell.

[0019] The installation cover, housing, and waterproof connector further enhance the device's waterproof and dustproof performance. The fit between the installation cover and housing, along with the sealing of cables at the cable entry and exit points by the waterproof connector, makes it difficult for external moisture and dust to enter the enclosure, better protecting components such as the contact modules and contactors in the line switching assembly, thus improving the device's protection level and reliability.

[0020] As a preferred embodiment of the present invention, a guide rail is mounted on the mounting housing, and the line switching component is mounted on the guide rail.

[0021] The mounting rails on the housing are used to secure the circuit switching components, facilitating their installation and removal, and making it easier to inspect and maintain components such as contact modules and contactors. At the same time, the rail mounting method allows for a more organized layout of the components within the housing, which is beneficial for the arrangement and management of internal wiring, and improves the overall assemblability and maintainability of the device.

[0022] As a preferred embodiment of the present invention, the guide rail is mounted on the mounting housing by a second screw and a washer.

[0023] The guide rail is mounted on the mounting housing using a second screw and a washer. This mounting method is secure and reliable, ensuring that the guide rail will not loosen during use, thus ensuring that the line switching assembly is stably installed within the mounting housing. It provides robust support for components such as the contact module and contactor, preventing component displacement or loosening due to vibration or other factors, and ensuring the normal operation of the automatic charging line switching device.

[0024] As a preferred embodiment of the present invention, three waterproof connectors are provided on the side of the mounting housing, namely the first waterproof connector, the second waterproof connector and the third waterproof connector;

[0025] An external first power source is connected to the input contact of the first contactor through a first waterproof connector, and an external second power source is connected to the input contact of the second contactor through a second waterproof connector. The power line output by the contact module is output through a third waterproof connector for connecting to an external device to be charged.

[0026] The waterproof connector is provided with a through hole that communicates with the inside of the mounting housing, and the connecting wire inside the mounting housing is connected to the outside of the mounting housing through the through hole.

[0027] The use of waterproof connectors not only ensures the waterproof performance of the circuit but also provides a certain degree of protection for the cables. Different waterproof connectors are used to connect to the primary power supply, secondary power supply, and output power supply, facilitating identification and management. Together with the internal circuit switching components and contact modules, it enables orderly power switching and stable output to external devices to be charged.

[0028] As a preferred embodiment of the present invention, the contact module is provided with one or more sets of contacts, which are connected to the power output lines of the contactor to realize external power output.

[0029] Secondly, the present invention also provides a device, including a charging mechanism and an automatic charging line switching device as described in the first aspect.

[0030] The power output line of the automatic charging line switching device is connected to the charging interface of the charging structure.

[0031] The beneficial effects of this utility model's technical solution are as follows: This automatic charging line switching device, by setting up a line switching component and utilizing the connection between the first contactor, the second contactor, and the contact module, can flexibly switch power output when different external power sources are connected. When one contactor is outputting power, the other contactor can be locked to prevent malfunctions caused by simultaneous connection of two power sources, thus ensuring circuit safety. Simultaneously, the contact module, as an intermediate node for power transmission, provides a stable electrical connection, ensuring that current can be reliably transmitted from the contactor to the output terminal, avoiding circuit failures caused by unstable connections. Attached Figure Description

[0032] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the device provided in an embodiment of this utility model.

[0034] Figure 2A circuit connection diagram of the device provided in an embodiment of this utility model.

[0035] In the diagram, 1. First screw, 2. Mounting cover, 3. First contactor, 4. Second contactor, 5. Contact module, 6. Second screw, 7. Washer, 8. Guide rail, 9. Mounting housing, 10. Waterproof connector, 11. 22-L2 Connecting cable, 12, T1-T1 Connecting cable, 13, T2-T2 Connecting cable, 14, T3-T3 Connecting wires, 15, 22 -L2 connector, 16, A2 -21 connecting cable, 17, A2-21 Connecting cable, 18, T1 -C3 connector, 19, T2 -C2 connector, 20, T3 -C1 connecting wire, 21. First auxiliary contact of the first contactor, 22. Second auxiliary contact of the first contactor, 23. Power output connector, 21 The first auxiliary contact of the second contactor, 22 The second auxiliary contact of the second contactor, A1; the positive coil contact of the first contactor, A2; the negative coil contact of the first contactor, A1. The positive connection contact of the second contactor coil, A2 The coil negative connection contact of the second contactor, L1; the first incoming contact of the first contactor, L2; the second incoming contact of the first contactor, L3; the third incoming contact of the first contactor, T1; the first outgoing contact of the first contactor, T2; the second outgoing contact of the first contactor, T3; the third outgoing contact of the first contactor, L1 The first incoming contact of the second contactor, L2 The second incoming contact of the second contactor, L3 The third incoming contact of the second contactor, T1 The first outgoing contact of the second contactor, T2 The second outgoing contact of the second contactor, T3 The third outgoing contact of the second contactor. Detailed Implementation

[0036] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] like Figure 1 As shown, this utility model provides an automatic switching device for charging lines, including a contact module 5, a first contactor 3, and a second contactor 4.

[0038] The first contactor 3 is connected to the second contactor 4 via a connecting line, and the second contactor 4 is connected to the contact module 5; the first contactor 3 is connected to an external first power source, and the second contactor 4 is connected to an external second power source.

[0039] Both the first contactor 3 and the second contactor 4 are provided with inlet contacts, outlet contacts, auxiliary contacts and coil wiring contacts; the outlet contacts of the first contactor 3 are connected to the outlet contacts of the second contactor 4, and the outlet contacts of the second contactor are connected to the contact module.

[0040] The coil wiring contact of the first contactor 3 is connected to the incoming contact of the first contactor 3, the coil wiring contact of the first contactor 3 is connected to the auxiliary contact of the second contactor 4, and the auxiliary contact of the second contactor 4 is connected to the incoming contact of the first contactor 3; the incoming contact of the first contactor 3 connected to the coil wiring contact of the first contactor and the incoming contact of the first contactor 3 connected to the auxiliary contact of the second contactor 4 are in the same power supply circuit;

[0041] The coil wiring contacts of the second contactor 4 are connected to the input contacts of the second contactor 4, and the coil wiring contacts of the second contactor 4 are connected to the auxiliary contacts of the first contactor 3; the auxiliary contacts of the first contactor 3 are connected to the input contacts of the second contactor 4. The input contacts of the second contactor 4 connected to the coil wiring contacts of the second contactor 4 and the input contacts of the second contactor 4 connected to the auxiliary contacts of the first contactor 3 are in the same power supply circuit. When an external power supply is connected, the first contactor 3 or the second contactor 4 transmits the corresponding power to the contact module through its own contacts. The power is output through the contact module 5, and the second contactor 4 or the first contactor 3 is locked in place through the connection line between the two contactors.

[0042] The contact module connects the output terminals of the first contactor 3 and the second contactor 4. When one of the contactors is working, it can transmit the corresponding power to the output terminal through its own contacts, realizing the switching output of different power supplies to power external loads.

[0043] This connection method, combined with the contact module, ensures that only one contactor operates during power switching, improving system stability and reliability. As a critical node for power output, the contact module guarantees the safe delivery of power from different contactors to the load.

[0044] In some embodiments, such as Figure 1 and 2 As shown, the first contactor is connected to the second contactor via a connecting line. Each contactor's input contacts include a first input contact, a second input contact, and a third input contact; each contactor's output contacts include a first output contact, a second output contact, and a third output contact; each contactor's auxiliary contacts include a first auxiliary contact and a second auxiliary contact; and each contactor's coil connection contacts include a positive coil connection contact and a negative coil connection contact. The connecting line includes 22-L2. Connecting cable 11, T1-T1 Connecting cable 12, T2-T2 Connector 13, T3-T3 Connecting cables 14 and 22 -L2 connecting cable 15, A2 -21 connecting cable 16, A2-21 Connecting cable 17, T1 -C3 connecting cable 18, T2 -C2 connector 19, T3 -C1 connecting cable 20 and A1-L1 connecting cable;

[0045] The first outgoing contact T1 of the first contactor 3 passes through T1-T1 Connecting wire 12 to the first outgoing contact T1 of the second contactor 4 The connection is made so that the second outgoing contact T2 of the first contactor 3 is connected via T2-T2. Connecting wire 13 to the second output contact T2 of the second contactor 4 The connection is made by connecting the third outgoing contact T3 of the first contactor 3 via T3-T3. Connecting wire 14 to the third outgoing contact T3 of the second contactor 4 Connection; the first outgoing contact T1 of the second contactor 4 via T1 - C3 connecting wire 18 is connected to the C3 contact of the contact module; the second output contact T2 of the second contactor 4 via T2 - C2 connecting wire 19 is connected to the C2 contact of the contact module; the third outgoing contact T3 of the second contactor 4 via T3 -C1 connecting wire 20 is connected to the C1 contact of the contact module;

[0046] The positive coil contact A1 of the first contactor is connected to the first input contact L1 of the first contactor, and the negative coil contact A2 of the first contactor is connected to the first auxiliary contact 21 of the second contactor. via A2-21 Connect cable 17;

[0047] The coil positive connection contact A1 of the second contactor The first incoming contact L1 of the second contactor Connect the negative coil contact A2 of the second contactor. The first auxiliary contact 21 of the first contactor is connected via A2 -21 connecting cable 16 connection;

[0048] The second auxiliary contact 22 of the first contactor and the second incoming contact L2 of the second contactor via 22-L2 Connecting wire 11 connects to the second auxiliary contact 22 of the second contactor. The second incoming contact L2 of the first contactor is connected via 22 -L2 connector 15 connection.

[0049] The corresponding connections of each outgoing contact, as well as the specific connections of the coil wiring contacts and auxiliary contacts, enable more precise interlocking and control logic between contactors. This sophisticated connection architecture enhances the overall performance and applicability of the automatic charging line switching device.

[0050] In a specific embodiment, the first contactor is a 220V contactor and the second contactor is a 380V contactor;

[0051] 22-L2 Connecting wire 11 connects to L2 of the 380V contactor. Contacts and the 22 contacts of the 220V contactor;

[0052] T1-T1 Connecting wire 12 connects to T1 of the 380V contactor. Contacts and the T1 contact of the 220V contactor;

[0053] T2-T2 Connecting wire 13 connects to T2 of the 380V contactor. Contacts and the T2 contact of the 220V contactor;

[0054] T3-T3 Connecting wire 14 connects to the T3 of the 380V contactor. Contacts and the T3 contact of the 220V contactor;

[0055] twenty two -L2 connecting wire 15 connects to the 380V contactor 22 Contacts and the L2 contact of the 220V contactor;

[0056] A2 -21 connecting wire 16 connects the A2 contact of the 380V contactor and the 21 contact of the 220V contactor;

[0057] A2-21 Connecting wire 17 connects to 21 of the 380V contactor. Contacts and the A2 contact of the 220V contactor;

[0058] T1 -C3 connecting wire 18 connects to the T1 of the 380V contactor. Contact and contact module 5's C3 contact;

[0059] T2 -C2 connecting wire 19 connects to the T2 of the 380V contactor. Contact and contact module 5's C2 contact;

[0060] T3 -C1 connects to the 380V contactor T3 via wire 20. Contacts and contact module 5's C1 contact;

[0061] The L1, L2, and L3 contacts of the 220V contactor are connected to the live wire, neutral wire, and ground wire of a single-phase power supply, respectively.

[0062] L1 of 380V contactor L2 L3 The contacts are connected to two phase lines and the ground line of the three-phase power supply, which are phase A, phase B and PE in this case.

[0063] When the automatic charging line switching device is connected to an external 220V charging line, the live wire passes through the A1-L1 connecting wire, the 220V contactor coil, and A2-21. Connection line 17, 380V contactor normally closed contact 21 -twenty two ,twenty two When L2 connection line 15 is connected to the neutral wire, the 220V contactor is activated. The normally open contact circuit inside the 220V contactor closes, connecting L1 and T1, L2 and T2, and L3 and T3 of the 220V contactor. Output is completed through the external wiring harness connected to the contact module, while simultaneously locking the 380V contactor. Because the normally open contact circuit inside the 220V contactor closes, the normally closed contact circuit 21-22 opens. Even if the 380V contactor is connected to the 380V charging line at this time, the live wire cannot be connected to L2 due to the open circuit of the normally closed contact circuit 21-22 of the 220V contactor. The 380V contactor cannot be activated and remains locked. It should be noted that this device is connected to a power output connector 23 via the contact module output line, through which the device to be charged is connected. This device can also be used in circuits supplying power to a load, in which case the load is connected via the power output connector 23.

[0064] When the automatic charging line switching device is connected to an external 380V charging line, the live wire passes through A1. -L1 Connecting wire, 380V contactor coil, A2 -21 connecting wire 16, 220V contactor normally closed contact 21-22 circuit, 22-L2 Connect cable 11 to L2 Activating the 380V contactor closes the normally open contact circuit inside the 380V contactor, connecting L1 of the 380V contactor. and T1 L2 and T2 L3 and T3 The output is completed through the external wiring harness connected to the contact module, and the 220V contactor is locked. The normally open contact circuit inside the 280V contactor closes, causing the normally closed contact 21 to... -twenty two Even if the 220V contactor is connected to the 220V charging line at this time, the normally closed contact 21 of the 380V contactor will still be open due to the disconnection of the circuit. -twenty two The circuit is disconnected, the live wire cannot be connected to the neutral wire, the 220V contactor cannot be activated, and the 220V contactor is locked.

[0065] Contact module 5 connects the 220V contactor output terminal and the 380V output terminal, reducing the wiring pressure of the contactor when multiple outputs are used and preventing the risks caused by loose wiring. Multiple sets of contact modules can be configured to achieve multiple outputs.

[0066] If the external 220V charging line and the external 380V charging line are connected at the same time, only the line of the contactor that is connected first will be activated, and the other line will be disconnected, thus achieving the purpose of protection.

[0067] In some embodiments, the device further includes a waterproof mounting box, in which the line switching assembly is mounted.

[0068] The waterproof mounting box encapsulates the line switching components, effectively preventing moisture, dust, and other external factors from corroding the internal electrical components and extending the device's lifespan. Simultaneously, it provides a relatively safe and stable working environment for components such as the contact module and contactors, preventing external environmental factors from affecting the normal operation of power switching and ensuring the entire automatic charging line switching device can operate reliably even in harsh environments.

[0069] like Figure 1 As shown, the waterproof mounting box includes a mounting cover 2, a mounting housing 9, and a waterproof connector 10. The mounting cover 2 is mounted on the mounting housing 9 by a first screw 1, and the waterproof connector 10 is mounted on the side of the mounting housing 9.

[0070] The installation of the mounting cover 2, mounting housing 9, and waterproof connector 10 further enhances the waterproof and dustproof performance of the device. The fit between the mounting cover and the mounting housing, as well as the sealing treatment of the waterproof connector for cable entry and exit, makes it difficult for external moisture and dust to enter the box, better protecting components such as contact modules and contactors in the line switching assembly, and improving the protection level and reliability of the device.

[0071] In some embodiments, a guide rail 8 is mounted on the mounting housing 9, and the line switching assembly is mounted on the guide rail 8. The contact module has a similar external structure to the contactor, and is equipped with a locking mechanism that secures it to the guide rail and allows it to slide along the rail. This utilizes the structure of an existing contactor.

[0072] The mounting rails on the housing are used to secure the circuit switching components, facilitating their installation and removal, and making it easier to inspect and maintain components such as contact modules and contactors. At the same time, the rail mounting method allows for a more organized layout of the components within the housing, which is beneficial for the arrangement and management of internal wiring, and improves the overall assemblability and maintainability of the device.

[0073] The guide rail 8 is mounted on the mounting housing 9 by the second screw 6 and the washer 7.

[0074] The guide rail is mounted on the mounting housing using a second screw and a washer. This mounting method is secure and reliable, ensuring that the guide rail will not loosen during use, thus ensuring that the line switching assembly is stably installed within the mounting housing. It provides robust support for components such as the contact module and contactor, preventing component displacement or loosening due to vibration or other factors, and ensuring the normal operation of the automatic charging line switching device.

[0075] In this embodiment of the utility model, three waterproof connectors are provided on the side of the mounting housing, namely the first waterproof connector, the second waterproof connector and the third waterproof connector;

[0076] An external first power source is connected to the input contact of the first contactor through a first waterproof connector, and an external second power source is connected to the input contact of the second contactor through a second waterproof connector. The power line output by the contact module is output through a third waterproof connector for connecting to an external device to be charged.

[0077] It should be noted that the waterproof connector is provided with a through hole that communicates with the inside of the mounting housing, and the connecting wire inside the mounting housing is connected to the outside of the mounting housing through the through hole.

[0078] The use of waterproof connectors not only ensures the waterproof performance of the circuit but also provides a certain degree of protection for the cables. Different waterproof connectors are used to connect to the primary power supply, secondary power supply, and output power supply, facilitating identification and management. Together with the internal circuit switching components and contact modules, it enables orderly power switching and stable output to external devices to be charged.

[0079] In some embodiments, the contact module is provided with one or more sets of contacts to connect to the power output lines of the contactor, thereby enabling external power output.

[0080] This utility model embodiment also provides a device, including a charging mechanism and an automatic charging line switching device as described in the above embodiment;

[0081] The power output line of the automatic charging line switching device is connected to the charging interface of the charging structure.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic charging line switching device, characterized in that, It includes a contact module, a first contactor, and a second contactor; the first contactor is connected to an external first power source, and the second contactor is connected to an external second power source; both the first and second contactors are provided with an inlet contact, an outlet contact, an auxiliary contact, and a coil wiring contact; the outlet contact of the first contactor is connected to the outlet contact of the second contactor, and the outlet contact of the second contactor is connected to the contact module; The coil wiring contact of the first contactor is connected to the incoming contact of the first contactor, the coil wiring contact of the first contactor is connected to the auxiliary contact of the second contactor, and the auxiliary contact of the second contactor is connected to the incoming contact of the first contactor; the incoming contact of the first contactor connected to the coil wiring contact of the first contactor and the incoming contact of the first contactor connected to the auxiliary contact of the second contactor are in the same power supply circuit; The coil wiring contact of the second contactor is connected to the input contact of the second contactor, and the coil wiring contact of the second contactor is connected to the auxiliary contact of the first contactor; the auxiliary contact of the first contactor is connected to the input contact of the second contactor, and the input contact of the second contactor connected to the coil wiring contact of the second contactor and the input contact of the second contactor connected to the auxiliary contact of the first contactor are in the same power supply circuit.

2. The automatic charging line switching device according to claim 1, characterized in that, The incoming contacts of the first contactor are connected to an external first power source, and the incoming contacts of the second contactor are connected to an external second power source. The incoming contacts include a first incoming contact, a second incoming contact, and a third incoming contact; the outgoing contacts include a first outgoing contact, a second outgoing contact, and a third outgoing contact; the auxiliary contacts include a first auxiliary contact and a second auxiliary contact; and the coil connection contacts include a positive coil connection contact and a negative coil connection contact.

3. The automatic charging line switching device according to claim 2, characterized in that, The first outgoing contact of the first contactor is connected to the first outgoing contact of the second contactor via a connecting wire; the second outgoing contact of the first contactor is connected to the second outgoing contact of the second contactor via a connecting wire; and the third outgoing contact of the first contactor is connected to the third outgoing contact of the second contactor via a connecting wire. The outgoing contacts of the second contactor are connected to the contact module via connecting wires; The positive coil contact of the first contactor is connected to the first input contact of the first contactor, and the negative coil contact of the first contactor is connected to the first auxiliary contact of the second contactor. The positive coil contact of the second contactor is connected to the first input contact of the second contactor, and the negative coil contact of the second contactor is connected to the first auxiliary contact of the first contactor. The second auxiliary contact of the first contactor is connected to the second incoming contact of the second contactor, and the second auxiliary contact of the second contactor is connected to the second incoming contact of the first contactor.

4. The automatic charging line switching device according to claim 1, 2, or 3, characterized in that, The device also includes a waterproof mounting box, in which the line switching assembly is installed.

5. The automatic charging line switching device according to claim 4, characterized in that, The waterproof mounting box includes a mounting cover, a mounting housing, and a waterproof connector. The mounting cover is mounted on the mounting housing, and the waterproof connector is mounted on the side of the mounting housing.

6. The automatic charging line switching device according to claim 5, characterized in that, The mounting housing is equipped with a guide rail, and the line switching assembly is mounted on the guide rail.

7. The automatic charging line switching device according to claim 6, characterized in that, The guide rail is mounted on the mounting housing by a first screw and a washer.

8. The automatic charging line switching device according to claim 5, characterized in that, Three waterproof connectors are provided on the side of the mounting housing, namely the first waterproof connector, the second waterproof connector and the third waterproof connector; An external first power source is connected to the input contact of the first contactor through a first waterproof connector, and an external second power source is connected to the input contact of the second contactor through a second waterproof connector. The power line output by the contact module is output through a third waterproof connector for connecting to an external device to be charged.

9. The automatic charging line switching device according to claim 1, characterized in that, The contact module is configured with one or more sets to connect to the power output lines of the contactor, thereby enabling external power output.

10. A device, characterized in that, Includes a charging mechanism and an automatic charging line switching device as described in any one of claims 1-9; The power output line of the automatic charging line switching device is connected to the charging interface of the charging structure.

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