An electric unlocking connector assembly and power transmission equipment

Abstract

An embodiment of the present application relates to an electrically unlocking connector assembly and a power transmission device, wherein the connector assembly includes: a first connector; a second connector, wherein a slot for the first connector to be plugged in is provided on the second connector, and a power supply circuit is provided in the second connector, for transmitting power to the first connector when the second connector is plugged in with the first connector; a first limiting portion is provided on the first connector, for limiting the separation of the first connector and the second connector when the two are connected; a second limiting portion is provided in the second connector, for cooperating with the first limiting portion to limit the separation of the first connector and the second connector when the two are connected; a locking portion, for limiting the separation of the first limiting portion and the second limiting portion when the first limiting portion and the second limiting portion are connected; and an operating portion, for driving the first limiting portion to separate from the second limiting portion after releasing the restriction of the locking portion on the first limiting portion and the second limiting portion.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electric vehicles, and more specifically, to an electric unlocking connector assembly and a power transmission device. Background Art

[0002] The national standard "Connection Device for Conductive Charging of Electric Vehicles" has been promulgated. For electric vehicles, according to this standard, the vehicle interface mainly uses the vehicle socket and the vehicle plug to connect to achieve energy and information interaction.

[0003] In the related art, the anti-dropping function of the plug and socket is mainly achieved by an external electronic lock. After the vehicle plug is inserted into the vehicle socket, the lock pin of the electronic lock extends to restrict the plug from being pulled out. However, the electronic lock is a general motor plus gear transmission structure, which is prone to accidents such as component failure or breakage, resulting in the plug being unable to be pulled out. In addition, since the electronic lock is externally attached, the sealing is poor, and it is easy for water to enter, causing damage to the electronic lock. Summary of the invention

[0004] The embodiments of the present application provide an electric unlocking connector assembly and a power transmission device, which are intended to solve the problem that electronic locks are easily damaged due to water ingress and the like.

[0005] A first aspect of an embodiment of the present application provides an electrically unlocking connector assembly, the connector assembly comprising:

[0006] A first connector;

[0007] a second connector, wherein the second connector is provided with a slot for the first connector to be plugged in, and the second connector is provided with a power supply circuit for transmitting power to the first connector when the second connector is plugged in with the first connector;

[0008] A first limiting portion, which is disposed on the first connecting head and is used to limit the separation of the first connecting head and the second connecting head when the two are connected;

[0009] a second limiting portion, the second limiting portion being disposed in the second connecting head and used for cooperating with the first limiting portion to limit the separation of the first connecting head and the second connecting head when the first connecting head and the second connecting head are connected;

[0010] Optionally, a slot for connecting the first limiting portion is provided on the second connecting head, the first connecting head can be inserted into the slot, the first limiting portion is arranged on the first connecting head, and the second limiting portion is arranged on the inner wall of the slot.

[0011] Optionally, the first limiting portion includes a snap groove, which is opened on the surface of the first connecting head, and the second limiting portion includes a snap member, which is movably arranged on the inner wall of the slot so that the snap member can extend into the snap groove when the first connecting head is connected to the second connecting head.

[0012] Optionally, the connector assembly also includes a locking portion, which includes a first locking end and a second locking end, the first locking end and the second locking end can attract or move away from each other when power is supplied, the first locking end is arranged in the second connecting head, the second locking end is movably arranged on one side of the first locking end, and when the second locking end is away from the first locking end, it is located on the movable path of the latch to limit the retraction of the latch.

[0013] Optionally, the locking portion further includes a feedback portion, and the feedback portion is used to control the on and off of the power supply circuit according to the extension and retraction state of the buckle.

[0014] Optionally, the feedback part includes a first detection end and a second detection end, the first detection end is arranged in the first connecting head, and the second detection end is arranged at the end where the fastener is always located in the first connecting head, so as to determine whether the fastener is extended according to whether the first detection end is in contact with the second detection end.

[0015] Optionally, the connector assembly further includes an operating portion, which includes a driving rod and a button, the driving rod being rotatably disposed in the first connecting head, the button being telescopically disposed on the surface of the first connecting head, one end of the driving rod being disposed at the bottom of the snap groove to contact the snap member, and the other end of the driving rod being connected to the button so as to drive the snap member to leave the snap groove by pressing the button.

[0016] Optionally, the operating portion further includes a resetting portion for driving the button to pop out.

[0017] Optionally, an end portion of the first connector is provided with an inclined surface for contacting the latch when the first connector contacts the latch in an extended state.

[0018] A second aspect of an embodiment of the present application provides a power transmission device, including an external energy storage device and an external power supply, including a connector assembly of any one of the above items, wherein the first connector is electrically connected to the external energy storage device, and the power supply circuit in the second connector is electrically connected to the external power supply.

[0019] An electrically unlocking connector assembly and power transmission equipment provided by the present application are adopted, wherein the first connector is connected to the vehicle, and the second connector is connected to the external charging device. When charging the vehicle, the first connector is connected to the second connector. After the first connector is inserted into the slot, the first limiting portion is connected to the second limiting portion, and then the separation between the first limiting portion and the second limiting portion is limited by the locking portion, thereby limiting the separation between the first connector and the second connector. After charging is completed, the locking effect of the locking portion is released, and then the connection between the first limiting portion and the second limiting portion is released through the operating portion, and the first connector can be separated from the second connector. By arranging the locking assembly inside the connector, the safety risk caused by the failure of the electronic lock is effectively reduced, and there is no need to reserve installation space like an external electronic lock, thereby reducing the space occupied by the entire vehicle, and at the same time reducing the risk of damage to the electronic lock due to water ingress and the like, thereby improving the safety of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 is a connection diagram of a connector assembly proposed in an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of a first connector proposed in an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a second connector proposed in an embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of a locking portion proposed in an embodiment of the present application.

[0025] Figure numerals: 100, first connector; 110, inclined plane; 200, second connector; 210, slot; 300, first limiting portion; 310, snap groove; 400, second limiting portion; 410, snap member; 500, locking portion; 510, first locking end; 520, second locking end; 530, feedback portion; 531, first detection end; 532, second detection end; 600, operating portion; 610, drive rod; 620, button. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The national standard "Connection Device for Conductive Charging of Electric Vehicles" has been promulgated. For electric vehicles, according to this standard, the vehicle interface mainly uses the vehicle socket and the vehicle plug to connect to achieve energy and information interaction.

[0028] In the related art, the anti-dropping function of the plug and socket is mainly realized by an external electronic lock. After the vehicle plug is inserted into the vehicle socket, the lock pin of the electronic lock extends to restrict the plug from being pulled out. However, the electronic lock is a general motor plus gear transmission structure, which drives the lock tongue to extend through the motor to restrict the plug from leaving. Since the mechanical structure is independently set, accidents such as component failure or breakage are prone to occur when the plug is separated during charging, resulting in the inability to pull out the plug, and the motor is prone to burn out, resulting in failure of the electronic lock.

[0029] In addition, due to the external setting of the electronic lock, installation space needs to be arranged on the plug and socket in advance, which places high requirements on the plug and socket. Moreover, due to the external setting being exposed to the outside, the sealing is poor, and water can easily enter, causing damage to the electronic lock.

[0030] Embodiment 1

[0031] The present application embodiment provides an electric unlocking connector assembly, referring to Figure 1 , the connector assembly includes:

[0032] The first connector 100 and the second connector 200 are provided with a slot 210 for the first connector 100 to be plugged into, and the second connector 200 is provided with a power supply circuit for transmitting power to the first connector 100 when the second connector 200 is plugged into the first connector 100;

[0033] Among them, the first connector 100 is a plug part connected to the vehicle or external energy storage device. The first connector 100 is electrically connected to the vehicle or external energy storage device through a conductive cable. When charging, the first connector 100 is connected to the power supply device to charge.

[0034] The second connector 200 is the socket part connected to the power supply device. A power supply circuit connected to the power supply device is arranged inside the second connector 200. After the first connector 100 is electrically connected to the second connector 200, the first connector 100 is electrically connected to the power supply circuit to realize power supply.

[0035] A first limiting portion 300, which is disposed on the first connector 100 and is used to limit the separation of the first connector 100 and the second connector 200 when the two are connected;

[0036] The second limiting portion 400 is disposed in the second connector 200 and is used to cooperate with the first limiting portion 300 to limit the separation of the first connector 100 and the second connector 200 when the first connector 100 and the second connector 200 are connected;

[0037] In some specific embodiments, the first connector 100 is inserted into the second connector 200, the first limiting portion 300 is located on the first connector 100, and the second limiting portion 400 is arranged on the inner wall of the second connector 200. When the first connector 100 is connected to the second connector 200, the first limiting portion 300 and the second limiting portion 400 are automatically connected to each other or connected to each other through manual control, thereby limiting the separation of the first connector 100 and the second connector 200, thereby avoiding the danger of falling off and making loud noises during charging.

[0038] The locking portion 500 is used to limit the separation of the first limiting portion 300 and the second limiting portion 400 when the first limiting portion 300 and the second limiting portion 400 are connected;

[0039] During the power supply process, if the first connector 100 is separated from the second connector 200 when the internal power supply circuit is not powered off, there is a risk of arcing and the safety is low. Therefore, when charging is not completed, the connection state between the first limiting part 300 and the second limiting part 400 is locked by the locking part 500.

[0040] For example, the activation or release of the locking part 500 is controlled by a control panel inside the vehicle or a remote control device. When the locking part 500 is activated, the first limiting part 300 and the second limiting part 400 cannot be separated, that is, the first connector 100 and the second connector 200 cannot be separated, thereby avoiding the risk of arcing. The activation state of the locking part 500 can also be automatically controlled by automatically detecting the power level of the vehicle or an external energy storage device, thereby improving the safety of the entire device.

[0041] The operating portion 600 is used to release the restriction of the locking portion 500 on the first limiting portion 300 and the second limiting portion 400 and drive the first limiting portion 300 to separate from the second limiting portion 400.

[0042] Specifically, when the locking portion 500 is locked, the first limiting portion 300 cannot be separated from the second limiting portion 400 through the operating portion 600, thereby avoiding the danger of the first connector 100 and the second connector 200 losing their restrictions and becoming separated due to misoperation; and when the locking portion 500 releases the restrictions on the first limiting portion 300 and the second limiting portion 400, the first limiting portion 300 and the second limiting portion 400 can be separated from the second limiting portion 400 through the operating portion 600, so that the first connector 100 and the second connector 200 can be separated.

[0043] In other embodiments, the operating part 600 may also be connected to an internal power supply circuit. When the first limiting part 300 is separated from the second limiting part 400 by the operating part 600, the internal power supply circuit is automatically powered off, further improving safety during operation.

[0044] The present application provides an electrically unlocked connector assembly and a power transmission device, wherein the first connector 100 is connected to the vehicle, and the second connector 200 is connected to the external charging device. When charging the vehicle, the first connector 100 is connected to the second connector 200, and after the first connector 100 is inserted into the slot 210, the first limiting portion 300 is connected to the second limiting portion 400, and then the locking portion 500 is used to limit the separation between the first limiting portion 300 and the second limiting portion 400, thereby limiting the first connector 100 and the second connector. After charging is completed, the locking effect of the locking part 500 is released, and then the connection between the first limiting part 300 and the second limiting part 400 is released through the operating part 600, and the first connecting head 100 can be separated from the second connecting head 200. By arranging the locking component inside the connecting head, the safety risk caused by the failure of the electronic lock is effectively reduced, and there is no need to reserve installation space like an external electronic lock, thereby reducing the space occupied by the entire vehicle. At the same time, the risk of damage to the electronic lock due to water ingress is reduced, thereby improving the safety of the entire device.

[0045] In some embodiments, a slot 210 for connecting the first limiting portion 300 is opened on the second connector 200, the first connector 100 can be inserted into the slot 210, the first limiting portion 300 is arranged on the first connector 100, and the second limiting portion 400 is arranged on the inner wall of the slot 210.

[0046] The slot 210 provided on the second connector 200 is adapted to the shape of the first connector 100 and is used for the first connector 100 to be plugged in. Specifically, a plurality of conductor contact rods are provided in the first connector 100, and a plurality of contact slots electrically connected to the electrodes of the power supply circuit are provided in the second connector 200. When the first connector 100 is inserted into the slot 210, the contact rods are synchronously plugged into the contact slots to realize the electrical connection between the power supply device and the vehicle or the energy storage device.

[0047] In other embodiments, the first connector 100 connected to the vehicle or energy storage device may include a portion of the slot 210, and the second connector 200 connected to the power supply device is a portion inserted into the slot 210, as long as the plug-in effect between the two is achieved.

[0048] Reference Figure 1 and Figure 2 In some embodiments, the first limiting portion 300 includes a snap groove 310, which is opened on the surface of the first connector 100, and the second limiting portion 400 includes a snap member 410, which is movably arranged on the inner wall of the slot 210 so that the snap member 410 is snapped into the snap groove 310 when the first connector 100 is connected to the second connector 200.

[0049] Among them, the snap groove 310 is opened on the surface of the first connector 100. After the first connector 100 is inserted into the slot 210, the snap groove 310 is located inside the slot 210. A movable hole is opened on the inner wall of the slot 210. The snap member 410 is telescopically arranged on the second connector 200 through the movable hole. When the first connector 100 is inserted into the slot 210, the position of the snap member 410 corresponds to the position of the snap groove 310. When the snap member 410 is inserted into the snap groove 310, the first connector 100 can be restricted from leaving the slot 210.

[0050] The buckle 410 may be driven by an electromagnetic device, or by a mechanical device such as a motor or a micro cylinder, so as to achieve the telescopic action of the buckle 410 .

[0051] Reference Figure 3 and Figure 4 In some embodiments, the locking portion 500 includes a first locking end 510 and a second locking end 520. The first locking end 510 and the second locking end 520 can attract or move away from each other when power is supplied. The first locking end 510 is disposed in the second connector 200, and the second locking end 520 is movably disposed on one side of the first locking end 510. When the second locking end 520 is away from the first locking end 510, it is located on the movable path of the latch 410 to limit the retraction of the latch 410.

[0052] Specifically, the first locking end 510 and the second locking end 520 are electromagnetic devices. By changing the electromagnetic poles of the first locking end 510 and the second locking end 520, the first locking end 510 and the second locking end 520 can be driven to approach each other or move away from each other. The movement direction of the second locking end 520 is perpendicular to the movement direction of the latch 410. Therefore, when the latch 410 is in an extended state and the magnetic poles between the first locking end 510 and the second locking end 520 drive the two to move away from each other, the second locking end 520 moves to the movement path of the latch 410 to limit the retraction of the latch 410. When the magnetic poles between the first locking end 510 and the second locking end 520 drive the two to approach each other, the second locking end 520 moves to the side close to the first locking end 510 so that the latch 410 can be retracted normally.

[0053] Two groups of the first locking end 510 and the second locking end 520 may be provided, and are respectively provided on both sides of the buckle 410 to improve the limiting effect of the buckle 410 .

[0054] The first locking end 510 and the second locking end 520 are connected to the control circuit in the second connector 200 , and the first locking end 510 and the second locking end 520 are controlled to move closer to or farther from each other by receiving a control request of the detection unit.

[0055] In other embodiments, the drive between the first locking end 510 and the second locking end 520 can also be other structures, such as a mechanical structure driven by a motor to drive the two to move closer or farther away from each other, or a telescopic structure such as a micro cylinder to drive the second locking end 520 to move, so as to achieve the above-mentioned effect.

[0056] In some embodiments, the locking portion 500 further includes a feedback portion 530 , and the feedback portion 530 is used to control the on and off of the power supply circuit according to the extension and retraction state of the latch 410 .

[0057] When the first connector 100 is connected to the second connector 200 and the latch 410 is in an extended state, it can be considered that charging is still required at this time, so the power supply circuit is controlled to be in a power supply state, and when the latch 410 is retracted, the first connector 100 and the second connector 200 can be separated at any time. Therefore, in order to avoid danger when the first connector 100 is pulled out, the state of the latch 410 is detected and fed back through the feedback unit 530, and the power supply circuit is controlled to be powered off when the latch 410 is retracted, thereby improving the safety of the device.

[0058] Specifically, the feedback part 530 includes a first detection end 531 and a second detection end 532. The first detection end 531 is arranged in the first connector 100, and the second detection end 532 is arranged at the end of the fastener 410 that is always located in the first connector 100, so as to determine whether the fastener 410 is extended based on whether the first detection end 531 is in contact with the second detection end 532.

[0059] Among them, the feedback part 530 includes a feedback circuit. When the feedback circuit is turned on, the power supply circuit is controlled to be disconnected to stop power supply. When the feedback circuit is disconnected, the power supply circuit is controlled to be turned on to start power supply. The first detection end 531 and the second detection end 532 are both electrically connected to the feedback circuit and are respectively one end of the feedback circuit. When the first detection end 531 and the second detection end 532 are in contact, the feedback circuit is turned on. When the first detection end 531 and the second detection end 532 are separated, the detection circuit is terminated. Since the second detection end 532 is arranged on the latch 410, and the second detection end 532 is in contact with the first detection end 531 when the latch 410 is fully retracted, the feedback circuit is turned on. Therefore, the extended state of the latch 410 can be determined by whether the first detection end 531 and the second detection end 532 are in contact, and the on and off of the power supply circuit is controlled according to the extended state of the latch 410, thereby effectively improving the safety of the entire device.

[0060] In other embodiments, the first detection end 531 and the second detection end 532 may also be other detection components. For example, the first detection end 531 may be a sensor, which determines the position of the latch 410 by sensing the position of the second detection end 532, thereby controlling the on and off of the power supply circuit.

[0061] In some embodiments, reference Figure 1 and Figure 2 The operating part 600 includes a driving rod 610 and a button 620. The driving rod 610 is rotatably arranged in the first connecting head 100, and the button 620 is telescopically arranged on the surface of the first connecting head 100. One end of the driving rod 610 is arranged at the bottom of the buckle groove 310 to contact the buckle 410, and the other end of the driving rod 610 is connected to the button 620 so as to drive the buckle 410 to leave the buckle groove 310 by pressing the button 620.

[0062] After the locking portion 500 releases the locking of the latch 410 , the latch 410 is still locked with the latch groove 310 . Therefore, when the first connector 100 and the second connector 200 need to be separated, the operating portion 600 is used to drive the latch 410 to leave the latch groove 310 .

[0063] Specifically, the driving rod 610 is arranged along the length direction of the first connecting head 100. At the same time, the rotation axis of the driving rod 610 is perpendicular to the length direction of the driving rod 610. At the same time, when the first connecting head 100 is connected to the second connecting head 200, the rotation axis of the driving rod 610 is perpendicular to the moving direction of the fastener 410. When the side away from the fastener groove 310 rotates toward the first connecting head 100, the end at the bottom of one side of the fastener groove 310 rotates toward the side close to the outside of the fastener groove 310, thereby ejecting the fastener 410 located in the fastener groove 310 outward, driving the fastener 410 back to the first connecting head 100, and realizing that the fastener 410 leaves the fastener groove 310.

[0064] The first connector 100 is provided with an opening for the button 620 to slide back and forth. The button 620 is rotatably connected to the end of the driving rod 610. When the button 620 is pressed, the driving rod 610 is driven to rotate.

[0065] In some embodiments, the operating portion 600 further includes a resetting portion for driving the button 620 to pop out.

[0066] Specifically, when the button 620 is pressed, the lever principle of the driving rod 610 drives the latch 410 to leave the latch groove 310. When the first connector 100 is separated from the second connector 200, the reset key drives the button 620 back to its original position, so that it can be pressed next time.

[0067] The reset button can be a spring, which is arranged at the bottom of the button 620. After the button 620 is released, the spring drives the button 620 to reset; it can also be a torsion spring, which is arranged at the rotation axis of the driving rod 610. After the button 620 is released, the torsion spring drives the driving rod 610 to rotate back to the initial position, thereby driving the button 620 to reset.

[0068] In other embodiments, the reset member may be of other types, such as a button 620 that can slide back and forth, and the active rod is driven to return to the initial position by pressing the button 620 in the reverse direction, thereby achieving automatic reset.

[0069] In some embodiments, a slope 110 is disposed at the end of the first connector 100 for contacting the latch 410 when the first connector 100 contacts the latch 410 in an extended state.

[0070] When the first connector 100 is inserted into the slot 210 on the second connector 200, the latch 410 may be in an extended state. In order to avoid the first connector 100 colliding with the latch 410 during insertion and causing damage to the latch 410, the edge of the first connector 100 close to the latch groove 310 is set as a slope 110. When the first connector 100 is inserted into the slot 210, the slope 110 contacts the latch 410, driving the latch 410 to slide along the slope 110, so that the latch 410 can smoothly return to or extend from the first connector 100.

[0071] Embodiment 2

[0072] Based on the same inventive concept, another embodiment of the present application provides a power transmission device, including an external energy storage device and an external power supply, and the above-mentioned connector assembly, wherein the first connector 100 is electrically connected to the external energy storage device, and the power supply circuit in the second connector 200 is electrically connected to the external power supply.

[0073] When applied to a vehicle, the external energy storage device is a battery of the vehicle, and the external power source can be a charging pile. When charging, the charging cable with the first connector 100 is connected to the second connector 200 on the charging pile, and the first limiting portion 300 is connected to the second limiting portion 400, the first connector 100 and the second connector 200 are locked, and the locking portion 500 is used to limit the separation of the two. When the first limiting portion 300 and the second limiting portion 400 are detected to be connected, the power supply circuit in the second connector 200 is controlled to be turned on, and the charging action is started. When the charging pile is charged, the charging cable 100 is connected to the second limiting portion 400. When the first connector 100 needs to be unplugged after the power is completed, the lock of the locking part 500 is released, the power supply circuit in the second connector 200 is controlled to be powered off, and then the first limiting part 300 is separated from the second limiting part 400 through the operating part 600, and the first connector 100 can be unplugged. Since the first limiting part 300 and the second limiting part 400 are both arranged inside, there is no need to do additional processing or reserve installation space for the external attachment. At the same time, since the limiting part is arranged inside the connector, the risk of accidents such as water ingress is reduced, and the safety of the entire device is improved.

[0074] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0075] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0077] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0078] The above is a detailed introduction to an electric unlocking connector assembly and a power transmission device provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for a general technician in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An electrically unlocking connector assembly, characterized in that: The connector assembly comprises: A first connector (100); A second connector (200), the second connector (200) being provided with a slot (210) for the first connector (100) to be plugged into, so that the first connector and the second connector can be electrically connected; A first limiting portion (300) comprises a buckle groove (310), wherein the buckle groove (310) is provided on the surface of the first connecting head (100) and is used to limit the separation of the first connecting head (100) and the second connecting head (200) when the two are connected; a second limiting portion (400), the second limiting portion (400) being arranged in the slot (210) and used for cooperating with the first limiting portion (300) to limit the separation of the first connector (100) and the second connector (200) when the first connector (100) and the second connector (200) are connected; the second limiting portion (400) comprises a snap-fitting member (410), and after the first connector (100) is inserted into the slot (210), the position of the snap-fitting member (410) corresponds to the position of the snap-fitting slot (310), and the snap-fitting member (410) is inserted into the snap-fitting slot (310) to limit the first connector (100) from leaving the slot (210); The locking portion (500) is used to limit the separation of the first limiting portion (300) and the second limiting portion (400) when the first limiting portion (300) is connected to the second limiting portion (400); the locking portion (500) includes a first locking end (510) and a second locking end (520), the first locking end (510) is arranged in the second connector (200), the second locking end (520) is movably arranged on one side of the first locking end (510), and the first locking end (510) and the second locking end (520) can attract or move away from each other when power is supplied, and the second locking end (520) is located on the movable path of the buckle (410) when it is away from the first locking end (510) to limit the retraction of the buckle (410); when the second locking end (520) moves to a side close to the first locking end (510), the buckle (410) can be normally retracted.

2. The connector assembly according to claim 1, characterized in that: The second connector (200) is provided with a slot (210) for connecting the first limiting portion (300); the first connector (100) can be plugged into the slot (210); the first limiting portion (300) is arranged on the first connector (100); and the second limiting portion (400) is arranged on the inner wall of the slot (210).

3. The connector assembly according to claim 2, characterized in that: The buckle member (410) is movably arranged on the inner wall of the slot (210) so that the buckle member (410) can extend into the buckle groove (310) when the first connector (100) is connected to the second connector (200).

4. The connector assembly according to claim 3, characterized in that: The locking portion (500) further comprises a feedback portion (530), and the feedback portion (530) is used to control the on and off of the power supply circuit according to the extension and retraction state of the buckle (410).

5. The connector assembly according to claim 4, characterized in that: The feedback portion (530) comprises a first detection end (531) and a second detection end (532), wherein the first detection end (531) is arranged in the first connector (100), and the second detection end (532) is arranged at an end of the buckle (410) that is always located in the first connector (100), so as to determine whether the buckle (410) is extended according to whether the first detection end (531) is in contact with the second detection end (532).

6. The connector assembly according to claim 3, characterized in that: The connector assembly also includes an operating portion (600), the operating portion (600) including a driving rod (610) and a button (620), the driving rod (610) being rotatably disposed in the first connector (100), the button (620) being telescopically disposed on the surface of the first connector (100), one end of the driving rod (610) being disposed at the bottom of the snap groove (310) to contact the snap member (410), the other end of the driving rod (610) being connected to the button (620) so as to drive the snap member (410) to leave the snap groove (310) by pressing the button (620).

7. The connector assembly according to claim 6, characterized in that: The operating portion (600) further comprises a resetting portion for driving the button (620) to pop out.

8. The connector assembly according to claim 3, characterized in that: An inclined surface (110) is provided at the end of the first connecting head (100) for contacting the buckle component (410) when the first connecting head (100) contacts the buckle component (410) in an extended state.

9. A power transmission device, comprising an external energy storage device and an external power supply, characterized in that: A connector assembly comprising any one of claims 1 to 8, wherein the first connector (100) is electrically connected to the external energy storage device, and a power supply circuit in the second connector (200) is electrically connected to the external power supply.

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