Plug assembly and energy storage system

Abstract

The invention relates to the technical field of energy storage power supplies, in particular to a plugging assembly and an energy storage system.According to the plugging assembly, a rotating groove and a plugging groove are formed in the outer surface of a socket, so that the plugging track and the unplugging track of a plug are controlled when the plug and the socket are subjected to hot plugging, and the situation that the plug falls off from the socket is reduced; the connection condition of the plug and the socket is determined by designing a convex block on the plug and determining the real-time position of the convex block in the plugging and unplugging slot and the connection state of the power supply pin / signal pin and the first interface / second interface, so that the safety and the reliability of the energy storage system are improved when the energy storage power supply is expanded through the plugging and unplugging assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy, and in particular to a plug-in component and an energy storage system. Background Art

[0002] Due to its own size and weight limitations, the battery capacity of a mobile energy storage power supply is usually small and cannot meet the demand for large-capacity batteries outdoors. Therefore, when used outdoors, a battery pack is needed to expand the capacity of the mobile energy storage power supply. When using a connecting cable to connect the battery pack and the energy storage power supply, it is necessary to consider the user's random plugging and unplugging of the cable. However, the existing technology uses a mechanical lock, which results in low reliability when the energy storage power supply is hot-plugged.

[0003] Therefore, in order to improve the reliability of the energy storage power supply during hot plugging, it is necessary to provide a plug-in assembly. Summary of the invention

[0004] The embodiments of the present invention provide a plug-in assembly and an energy storage system, aiming to solve the technical problem of low reliability of energy storage power supply during hot plugging in the prior art.

[0005] In order to solve the above technical problems, a technical solution adopted by the embodiment of the present invention is: providing a plug assembly, including a plug and a socket, the socket is provided with a first interface and a second interface, the plug includes a signal pin and a power pin;

[0006] The outer surface of the socket is provided with a limiting groove, the limiting groove includes a rotating groove and a plug-in groove connected to each other, and along the length direction of the signal pin and / or the power pin, the plug-in groove includes a first position and a second position which are relatively arranged, and the second position is an end of the plug-in groove connected to the rotating groove;

[0007] The plug includes a protrusion configured to move along the rotation slot and the plug-in slot;

[0008] When the protrusion is located at the second position, the power pin is electrically connected to the first interface, and the signal pin is disconnected from the second interface;

[0009] When the protrusion is located at the second position, the power pin is electrically connected to the first interface, and the signal pin is electrically connected to the second interface.

[0010] Optionally, the limiting groove further includes a locking groove, one end of which is connected to an end of the plug-in groove away from the rotation groove;

[0011] The included angle between the locking groove and the plugging groove is α, 80°≤α≤100°.

[0012] Optionally, the plug is rotatably provided with a rotating shell, the inner side wall of the rotating shell is provided with the protrusion, and the rotating shell is configured to rotate around the socket and enable the protrusion to move along the rotating groove.

[0013] Optionally, the signal pin and the power pin are both arranged in the rotating housing.

[0014] Optionally, the length of the power pin is greater than the length of the signal pin.

[0015] Optionally, when the protrusion is located in the rotation groove, the power pin is disconnected from the first interface, and the signal pin is electrically disconnected from the second interface.

[0016] Optionally, a plurality of the limiting grooves are arranged on the outer surface of the socket, and along the circumference of the socket, the plurality of limiting grooves are arranged around the outer surface of the socket;

[0017] The plug is provided with a plurality of protrusions, and each of the protrusions is correspondingly arranged in one of the limiting grooves.

[0018] In order to solve the above technical problems, another technical solution adopted by the embodiment of the present invention is: providing an energy storage system, comprising a first power supply device, a connector, a second power supply device and the plug assembly described in any of the above embodiments, wherein the plug in the plug assembly is arranged on the connector, and the socket is arranged on the first power supply device;

[0019] The second end of the connector is electrically connected to the second power supply device, and a signal pin and a power pin are provided on the plug, and the length of the signal pin is smaller than the length of the power pin. When the plug is plugged into the socket provided on the first power supply device and the first power supply device is electrically connected to the signal pin, the second power supply device or the first power supply device responds to the control loop formed by the first power supply device, the signal pin and the second power supply device, and controls the first power supply device to interact with the second power supply device through the power pin for power supply.

[0020] Optionally, the first power supply device includes a detection circuit, a first controller, a battery and a first power switch;

[0021] The detection circuit is connected to the socket and the first controller respectively, the first controller is connected to the first power switch, and the first power switch is connected to the battery and the socket respectively;

[0022] The socket is provided with a first interface and a second interface. When the plug is plugged into the first power supply device, the first interface is connected to the power pin, and the second interface is connected to the signal pin. When the first controller forms a control loop in response to the second interface, the signal pin and the second power supply device, the first controller controls the first power supply switch to be closed, so that the battery interacts with the second power supply device for power supply through the first interface and the power pin.

[0023] Optionally, the second power supply device is provided with a second controller and a second power switch;

[0024] The second controller is connected to the second power switch, and the first controller is also used to communicate with the second controller when the second interface, the signal pin and the second power supply device form a control loop, so that the second controller controls the second power switch to turn on.

[0025] Different from the related art, the present invention provides a plug-in assembly and an energy storage system. The plug-in assembly is provided with a rotating groove and a plug-in groove on the outer surface of the socket to control the insertion trajectory and the removal trajectory of the plug when the plug and the socket are hot-plugged, thereby reducing the plug from falling off the socket. By designing a protrusion on the plug, and determining the real-time position of the protrusion in the removal slot and the connection status of the power pin / signal pin and the first interface / second interface, the connection status of the plug and the socket is determined, thereby improving the safety and reliability of the energy storage system when the energy storage power supply is expanded through the plug-in assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0027] Figure 1 is a schematic diagram of an application scenario of an energy storage system provided by an embodiment of the present invention;

[0028] Figure 2 is a structural block diagram of a first power supply device provided by an embodiment of the present invention;

[0029] Figure 3 is a structural block diagram of a second power supply device provided by an embodiment of the present invention;

[0030] Figure 4a is a schematic diagram of a plug provided by an embodiment of the present invention;

[0031] Figure 4b is a schematic diagram of a signal detection principle provided by an embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of a socket provided by an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of a plug-in assembly provided by an embodiment of the present invention;

[0034] Figure 7 It is a side view of a plug provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of the present invention. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order from the module division in the device schematic diagram or the order in the flow chart.

[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0038] See also Figure 1 , Figure 1 is a schematic diagram of an application scenario of an energy storage system provided by an embodiment of the present invention, such as Figure 1 As shown, the application scenario mainly includes an energy storage system 1 and a load 2. The energy storage system 1 is connected to the load 2. The energy storage system 1 is mainly used to output the stored voltage to the load 2 so that the load 2 starts working based on the voltage.

[0039] Among them, Figure 1As shown, the energy storage system 1 includes a first power supply device 100, a connector 200, a second power supply device 300 and a plug assembly 400, wherein the plug assembly 400 includes a socket 11 and a plug 21, the plug 21 is arranged on the connector 300, and the socket 11 is arranged on the first power supply device 100. The second end of the connector 200 is electrically connected to the second power supply device 300, and the plug 21 is provided with a signal pin 211 and a power pin 212, the length of the signal pin 211 is shorter than the length of the power pin 212, when the plug 21 is plugged into the socket arranged on the first power supply device 100 and the first power supply device 100 is electrically connected to the signal pin 211, the second power supply device 300 or the first power supply device 100 responds to the control loop formed by the first power supply device 100, the signal pin 211 and the second power supply device 300, and controls the first power supply device 100 to perform power supply interaction with the second power supply device 300 through the power pin 212.

[0040] It should be noted that the second power supply device 300 can be an energy storage power supply, which can have a built-in battery or a separate inverter host; the second power supply device 300 can be connected to the load 2 or an external power supply, and the second power supply device 300 is used to output a working voltage to drive the load 2 to work, and to receive an external power supply to charge the built-in battery or the external first power supply device 100. Since a single power supply device cannot have both volume and power at the same time due to limitations, in order to facilitate the transportation of the power supply device, a connector 200 and a plug-in assembly 400 are usually provided to connect multiple power supply devices to achieve capacity expansion of the energy storage system. For example, in this embodiment, the first power supply device 100, the connector 200, and the plug-in assembly 400 provide power to the second power supply device 300, thereby achieving capacity expansion for the second power supply device 300, thereby improving the endurance of the energy storage system 1.

[0041] Furthermore, when the capacity of the second power supply device 300 is expanded by the first power supply device 100, due to the randomness of the user plugging and unplugging the connector, in order to avoid safety accidents, before the first power supply device 100 supplies power to the second power supply device 300, the first power supply device 100 needs to output voltage to the second power supply device 300 only after determining that the communication with the second power supply device 300 is successful, so as to improve the safety of the energy storage system 1.

[0042] Specifically, when the plug 21 in the plug assembly 400 is disposed in the connector 200, the plug 21 has a signal pin 211 and a power pin 212. If the plug 21 is plugged into the socket 11 disposed in the first power device 100, the first power device 100 will determine whether the communication with the second power device 300 is successful through the signal pin 211, and after determining that the communication with the second power device 300 is successful, the first power device 100 will output a voltage to the second power device 300 through the power pin 212 to expand the capacity of the second power device 300.

[0043] In another embodiment, the load 2 can also be powered by the first power supply device 100. In this case, when the first power supply device 100 needs to supplement power, the second power supply device 300 is connected to an external power supply. When the external power supply supplies power to the first power supply device 100 through the second power supply device 300, the connector 200 and the plug-in assembly 400, the first power supply device 100 will detect whether the communication with the second power supply device 300 is successful through the signal pin 211, and after the communication is successful, the first power supply device 100 receives the voltage output by the second power supply device 300 through the power pin 212, thereby meeting the power supply requirements while improving the safety of the energy storage system.

[0044] Further, in some embodiments, the first power supply device 100 is an energy storage power supply, and the second power supply device 300 is a battery pack. In other embodiments, the first power supply device 100 and the second power supply device 300 are both energy storage power supplies.

[0045] In some embodiments, see Figure 2 , Figure 2 is a structural block diagram of a first power supply device provided by an embodiment of the present invention, such as Figure 2 As shown, the first power supply device 100 includes a detection circuit 12, a first controller 13, a battery 14 and a first power switch 15;

[0046] The detection circuit 12 is connected to the socket 11 and the first controller 13 provided on the first power supply device 100 respectively, the first controller 13 is connected to the first power switch 15, and the first power switch 15 is connected to the battery 14 and the socket 11 respectively;

[0047] The socket 11 is provided with a first interface 111 and a second interface 112. When the plug 21 is plugged into the socket 11 provided on the first power supply device 100, the first interface 111 is connected to the power pin 212, and the second interface 112 is connected to the signal pin 211; when the first controller 13 forms a control loop in response to the second interface 112, the signal pin 211, and the second power supply device 300, the first controller controls the first power supply switch 15 to be closed, so that the battery 14 interacts with the second power supply device 300 for power supply through the first interface 111 and the power pin 212.

[0048] Specifically, when the second power supply device 300 needs to be expanded, the plug 21 will be plugged into the socket 11, so that the first power supply device 100 is connected to the second power supply device 300 through the plug assembly 400 and the connector 200. When the plug 21 is plugged into the socket 11, the length of the signal pin 211 of the plug 21 is shorter than the length of the power pin 212. Therefore, the power pin 212 will first contact the first interface 111 of the socket 11. After the power pin 212 contacts the first interface 111, the signal pin 211 will contact the second interface 112. After the signal pin 211 contacts the second interface 112, the detection module 12 will detect whether the second interface 112, the signal pin 211, and the second power supply device 300 form a control loop through the signal pin 211. If the second interface 112, the signal pin 211, and the second power supply device 300 form a control loop, it is considered that the first power supply device 100 and the second power supply device 300 communicate successfully. At this time, the first controller 13 controls the first power switch 15 to be closed, so that the battery 14 outputs voltage to the second power supply device 300 to supply power to the second power supply device 300. If the second interface 112, the signal pin 211, and the second power supply device 300 do not form a control loop, it is considered that the communication between the first power supply device 100 and the second power supply device 300 has failed. At this time, the first controller 13 controls the first power switch 15 to be opened, so as to stop outputting voltage to the second power supply device 300.

[0049] In some embodiments, when the first power supply device 100 successfully communicates with the second power supply device 300, the first controller 13 will also obtain the first voltage value of the output voltage of the battery 14, and obtain the second voltage value of the second power supply device 300 based on the signal pin 211, and then calculate the difference between the first voltage value and the second voltage value. If the difference is less than the preset voltage threshold, the first power switch 15 is controlled to close so that the battery 14 outputs voltage to the second power supply device 300 through the first interface 111 and the power pin 212. If the difference is greater than the preset voltage threshold, the first power switch 15 is not closed to improve the safety of the energy storage system. It should be noted that when the difference between the first voltage value and the second voltage value is greater than the preset voltage threshold, if the first power switch 15 is directly closed, the large current at the moment of closing will damage the second power supply device 300, thereby reducing the safety of the energy storage system.

[0050] In another embodiment, when the first power supply device 100 communicates successfully with the second power supply device 300, that is, when the second interface 112 forms a control loop with the signal pin 211 and the second power supply device 300, the detection module 12 outputs a first control signal to the first controller 13, so that the first controller 13 controls the first power switch 15 to close according to the first control signal, thereby outputting a voltage to the second power supply device 300 to power the second power supply device 300.

[0051] When the first power supply device 100 supplies power to the second power supply device 300, the detection module 12 will detect in real time whether the second interface 112, the signal pin 211, and the second power supply device 300 form a control loop. Once it is not detected that the second interface 112, the signal pin 211, and the second power supply device 300 form a control loop, the first controller 13 will receive a second control signal and control the first power switch 15 to be disconnected according to the second control signal, so that the first power supply device 100 stops supplying power to the second power supply device 300.

[0052] In another embodiment, when the second power supply device 300 supplies power to the first power supply device 100, if the second interface 112, the signal pin 211, and the second power supply device 300 form a control loop, the first power switch 15 is controlled to be closed, so that the voltage in the second power supply device 300 is input to the battery 14 through the power pin 212 to charge the battery 14. If the second interface 112, the signal pin 211, and the second power supply device 300 do not form a control loop, the first power switch 15 is controlled to be disconnected, so that the first power supply device 100 stops receiving the voltage output by the second power supply device 300.

[0053] In some embodiments, see Figure 3 , Figure 3 is a structural block diagram of a second power supply device provided by an embodiment of the present invention, such as Figure 3 As shown, the second power supply device 300 includes a second controller 31, a second power switch 32 and a battery 33;

[0054] The second controller 31 is connected to the second power switch 32, and the second power switch 32 is also connected to the battery 33. The first controller 13 is also used to communicate with the second controller 31 when receiving the first control signal, so that the second controller 31 controls the second power switch 32 to turn on.

[0055] Specifically, when the first controller 13 receives the first control signal, while controlling the first power switch 15 to close, it also outputs the first control signal to the second controller 31, so that the second controller 31 controls the second power switch 32 to close. When the second power switch 32 is also closed, the power supply interaction between the first power supply device 100 and the second power supply device 300 can be realized.

[0056] Furthermore, when the first controller 13 receives the second control signal, the first controller 13 will also input the second control signal to the second controller 31, so that the second controller 31 controls the second power switch 32 to disconnect according to the second control signal, thereby stopping the power supply interaction between the first power supply device 100 and the second power supply device 300.

[0057] In yet another embodiment, Figure 1As shown, the plug assembly 400 has two plugs 21, one plug 21 is arranged at the first end of the connector 200, and the other plug 21 is arranged at the second end of the connector 200; the two plugs 21 have the same structure, that is, both plugs have a signal pin 211 and a power pin 212, the length of the signal pin 211 on the plug 21 is shorter than the length of the power pin 212, and the first end of the connector 200 is plugged with the first power supply device 100 through one of the plugs 21. The second end of the connector 200 is plugged with the second power supply device 300 through the other plug 21.

[0058] Specifically, when the plug 21 is plugged into the second power supply device 300 and the second power supply device 300 is electrically connected to the signal pin 211, the second power supply device 300 detects whether the communication is successful through the signal pin 211. If the communication is successful, it is considered that the first power supply device 100 and the second power supply device 300 are successfully connected through the connector 200. At this time, the second power supply device 300 interacts with the first power supply device 100 through the power pin.

[0059] In some embodiments, see Figure 4a-4b , Figure 4a is a schematic diagram of a plug provided in an embodiment of the present invention, Figure 4b is a schematic diagram of a signal detection principle provided by an embodiment of the present invention, such as Figure 4a As shown, each of the plugs 21 has two signal pins 211 , and one signal pin of one plug is electrically connected to one signal pin of another plug, and the other signal pin of one plug is electrically connected to the other signal pin of another plug.

[0060] like Figure 4b As shown, the second power supply device 300 is provided with a short-circuit wire. When the second power supply device 300 is electrically connected to the connector 200 , the short-circuit wire is used to short-circuit two signal pins on the plug 21 .

[0061] Further, combined with Figure 2 and Figure 4b One end of the second interface 112 is used to connect to the signal pin 211 on the plug 21, the battery 14 and the first controller 13, and the other end of the second interface 112 is used to connect to the other signal pin 211 on the plug 21 and the ground. The first controller 13 controls the first power switch 15 to be turned on in response to the power supply circuit formed by the battery 14, the signal pin 211, the short-circuit wire and the other signal pin 211.

[0062] Specifically, two signal lines are provided on the two plugs 21. When the first power supply device 100 and the second power supply device 300 need to interact with each other in power supply, one of the plugs 21 is plugged into the socket 11 provided on the first power supply device 100 and the signal pin 211 is electrically connected to the first power supply device 100, and the other plug 21 is plugged into the second power supply device 300 and the signal pin 211 of the other plug 21 is electrically connected to the second power supply device 300. When the second power supply device 300 is electrically connected to the signal pin 211 of the other plug 21, the signal pin 211 of the other plug 21 will be short-circuited. At this time, the first controller 13 will detect a low-level signal through the signal pins 211 of the two plugs 21, and control the first power switch 15 to close according to the low-level signal, thereby starting to interact with the second power supply device 300 in power supply. If the signal pin 211 of the other plug 21 is disconnected from the second power supply device 300, the battery 14 and the signal pins 211 of the two plugs 21 do not form a power supply circuit. At this time, the first controller 13 detects a high-level signal and controls the first power switch 15 to be disconnected according to the high-level signal, thereby stopping power supply interaction with the second power supply device 300 .

[0063] An embodiment of the present invention provides an energy storage system, including a first power supply device, a connector, a plug assembly and a second power supply device, wherein the plug in the plug assembly is arranged on the connector, and the socket is arranged on the first power supply device. The second end of the connector is electrically connected to the second power supply device, and a signal pin and a power pin are arranged on the plug, wherein the length of the signal pin is less than the length of the power pin. When the plug is plugged into the socket arranged on the first power supply device and the first power supply device is electrically connected to the signal pin, it is determined that the communication between the first power supply device and the second power supply device is successful. At this time, the second power supply device or the first power supply device responds to the control loop formed by the first power supply device, the signal pin and the second power supply device, and controls the first power supply device to perform power supply interaction with the second power supply device through the power pin. Based on this, power supply interaction is performed after the first power supply device and the second power supply device successfully communicate, thereby preventing the surge impact current generated by the live access moment or the leakage caused by the live pull-out during hot plugging, thereby improving the reliability of the energy storage system.

[0064] Further, in some embodiments, see Figure 5 and Figure 6 , Figure 5 is a schematic diagram of a socket provided by an embodiment of the present invention, Figure 6 Schematic diagram of a plug-in assembly provided by the present invention. Figure 5 and Figure 6As shown, the socket 11 is a two-stage socket, and the socket 11 includes a first interface 111, a second interface 112 and a limiting groove 113. For example, the socket 11 includes a shell 114, and the first interface 111 and the second interface 112 are both arranged in the shell 114. One end of the shell 114 is open, and the plug 21 can be plugged into the first interface 111 and the second interface 112 through the open end. The limiting groove 113 can be provided on the outer surface of the shell 114, and the limiting groove 113 is used to limit the insertion track and the extraction track of the plug 21, which can reduce the plug 21 from coming out of the socket 11.

[0065] Please refer to Figure 7 When the plug 21 and the socket 11 are plugged into the first position 1132a, the first interface 111 is electrically connected to the power pin 212, and the second interface 112 is electrically connected to the signal pin 211.

[0066] When the socket 11 and the plug 21 are plugged into the second position 1132 b , the first interface 111 is electrically connected to the power pin 212 , and the second interface 112 is not electrically connected to the signal pin 211 .

[0067] When the socket 11 and the plug 21 are plugged into the third position 1131 a , the first interface 111 is not electrically connected to the power pin 212 , and the second interface 112 is not electrically connected to the signal pin 211 .

[0068] In order to further ensure that the connector can be hot-plugged, a protrusion 214 is further provided on the plug 21, and the limiting groove 113 includes a rotating groove 1131 and a plug-in groove 1132, and the rotating groove 1131 is connected to the plug-in groove 1132. When the plug 21 is plugged into the socket 11, the protrusion 214 slides on the rotating groove 1131 and the plug-in groove 1132.

[0069] Optionally, along the length direction of the signal pin 211 and / or the power pin 212, the plug-in slot 1132 includes a first position 1132a and a second position 1132b that are relatively arranged, wherein the first position 1132a is where the protrusion 214 is located at an end of the plug-in slot 1132 away from the rotation slot 1131;

[0070] The second position 1132b is where the protrusion 214 is located at an end where the plug-in slot 1132 and the rotation slot 1131 are connected;

[0071] The third position 1131a is where the protrusion 214 is located at one end of the rotation slot 1131 away from the plug slot 1132. Alternatively, the third position 1131a is located in the entire rotation slot 1131.

[0072] Specifically, by providing a rotating groove 1131 and an inserting groove 1132 on the socket 11, when the plug 21 is plugged into the socket 11, in the first stage, the protrusion 214 of the plug 21 slides from one end of the rotating groove 1131 away from the inserting groove 1132 to the other end of the rotating groove 1131, and the plug 21 and the socket 11 are plugged into the second position 1132b, so that the power pin 212 is electrically connected to the first interface 111. In the second stage, the protrusion 214 slides from one end of the plug-in slot 1132 connected to the rotating slot 1131 to the other end of the plug-in slot 1132, that is, the protrusion 214 reaches the first position 1132a. At this time, not only the power pin 212 is electrically connected to the first interface 111, but also the signal pin 211 is electrically connected to the second interface 112. In this way, the time for the power pin 212 and the signal pin 211 to be electrically connected to the first interface 111 and the second interface 112 respectively can be extended, thereby further ensuring the hot-swap effect of the energy storage system during expansion. It can be understood that the principle of the unplugging process is similar to that of the inserting process, and will not be repeated in this embodiment.

[0073] In some embodiments, the limiting groove 113 further includes a locking groove 1133, one end of which is connected to the end of the plug-in groove 1132 away from the rotating groove 1131. Specifically, in order to prevent the connector and the power supply device from being accidentally unplugged or loosened during the plug-in process, the locking groove 1133 is provided, and the locking groove 1133 can be located in the horizontal direction, for example, the angle between the locking groove 1133 and the plug-in groove 1132 is α, 80°≤α≤100°, and preferably the locking groove 1133 is vertically arranged with the plug-in groove 1132. When the plug 21 needs to be unplugged, the protrusion 214 needs to be rotated from the end of the locking groove 1133 away from the plug-in groove 1132 to the other end of the locking groove 1133, so that the protrusion 214 can be slid along the plug-in groove 1132 and the rotating groove 1131, so that the limiting effect of the locking groove 1133 can prevent the connector and the power supply device from being accidentally unplugged or loosened during the plug-in process.

[0074] In some embodiments, the plug 21 is provided with a rotating shell 213, the protrusion 214 is located on the inner side wall of the rotating shell 213, the power pin 212 and the signal pin 211 are arranged inside the rotating shell 213, and the rotating shell 213 is arranged to rotate relative to the power pin 212 and the signal pin 211. It should be noted that the first interface 111 and the second interface 112 are located at fixed positions. For the two-stage socket 11, the plug 21 needs to be rotated during the plugging and unplugging process. Therefore, by providing the rotating shell 213, the protrusion 214 can slide along a preset path in the limit groove 113, thereby driving the plug 21 and the socket 11 to be inserted or unplugged, that is, the power pin 212 can be reliably connected to the first interface 111, and the signal pin 211 can be reliably connected to the second interface 112 during the plugging and unplugging process.

[0075] In some other embodiments, the outer surface of the socket 11 is provided with a plurality of limiting grooves 113, and the plurality of limiting grooves 113 are arranged around the outer surface of the socket 11 along the circumference of the socket 11. The plug 21 is provided with a plurality of protrusions 214, for example, a plurality of protrusions 214 are arranged in the rotating shell 213, and each protrusion 214 is arranged correspondingly in a limiting groove 113. The arrangement of the plurality of protrusions 214 and the limiting grooves 113 can improve the stability of the plug-in connection between the plug 21 and the socket 11. It can be understood that there are two sockets 11 in the plug assembly 400, one of which is arranged in the first power supply device 100, and the other socket 11 is arranged in the second power supply device 300, and the structures of the two sockets are consistent, and the structures of the two plugs are consistent. The specific plug-in principle will not be repeated in this embodiment.

[0076] An embodiment of the present invention provides a plug-in assembly, which is provided with a rotating groove and a plug-in groove on the outer surface of a socket, so as to control the insertion trajectory and the removal trajectory of the plug when the plug and the socket are hot-plugged, thereby reducing the plug from falling off the socket; and by designing a protrusion on the plug, and by determining the real-time position of the protrusion in the removal slot and the connection status of the power pin / signal pin and the first interface / second interface, the connection status of the plug and the socket is determined, thereby improving the safety and reliability of the energy storage system when the energy storage power supply is expanded through the plug-in assembly.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plug assembly, comprising a plug and a socket, It is characterized in that The socket is provided with a first interface and a second interface, and the plug includes a signal pin and a power pin; The outer surface of the socket is provided with a limiting groove, the limiting groove includes a rotating groove and a plug-in groove connected to each other, and along the length direction of the signal pin and / or the power pin, the plug-in groove includes a first position and a second position which are relatively arranged, and the second position is an end of the plug-in groove connected to the rotating groove; The plug includes a protrusion configured to move along the rotation slot and the plug-in slot; When the protrusion is located at the second position, the power pin is electrically connected to the first interface, and the signal pin is disconnected from the second interface; When the protrusion is located at the second position, the power pin is electrically connected to the first interface, and the signal pin is electrically connected to the second interface.

2. The plug assembly according to claim 1, It is characterized in that The limiting groove further comprises a locking groove, one end of which is connected to an end of the plug-in groove away from the rotation groove; The included angle between the locking groove and the plugging groove is α, 80°≤α≤100°.

3. The plug assembly according to claim 1, It is characterized in that The plug is rotatably provided with a rotating shell, the inner side wall of the rotating shell is provided with the protrusion, and the rotating shell is configured to rotate around the socket and enable the protrusion to move along the rotating groove.

4. The plug assembly according to claim 3, It is characterized in that The signal pin and the power pin are both arranged in the rotating housing.

5. The plug assembly according to claim 1, It is characterized in that The length of the power pin is greater than the length of the signal pin.

6. The plug assembly according to claim 1, It is characterized in that When the protrusion is located in the rotation groove, the power pin is disconnected from the first interface, and the signal pin is electrically disconnected from the second interface.

7. The plug assembly according to any one of claims 1 to 6, It is characterized in that The outer surface of the socket is provided with a plurality of the limiting grooves, and along the circumference of the socket, the plurality of limiting grooves are arranged around the outer surface of the socket; The plug is provided with a plurality of protrusions, and each of the protrusions is correspondingly arranged in one of the limiting grooves.

8. An energy storage system, It is characterized in that It comprises a first power supply device, a connector, a second power supply device and a plug assembly as claimed in any one of claims 1 to 7, wherein the plug in the plug assembly is arranged on the connector, and the socket is arranged on the first power supply device; The second end of the connector is electrically connected to the second power supply device, and a signal pin and a power pin are provided on the plug, and the length of the signal pin is smaller than the length of the power pin. When the plug is plugged into the socket provided on the first power supply device and the first power supply device is electrically connected to the signal pin, the second power supply device or the first power supply device responds to the control loop formed by the first power supply device, the signal pin and the second power supply device, and controls the first power supply device to interact with the second power supply device through the power pin for power supply.

9. The energy storage system according to claim 8, It is characterized in that The first power supply device includes a detection circuit, a first controller, a battery and a first power switch; The detection circuit is connected to the socket and the first controller respectively, the first controller is connected to the first power switch, and the first power switch is connected to the battery and the socket respectively; The socket is provided with a first interface and a second interface. When the plug is plugged into the socket provided on the first power supply device, the first interface is connected to the power pin, and the second interface is connected to the signal pin. When the first controller forms a control loop in response to the second interface, the signal pin and the second power supply device, the first controller controls the first power supply switch to be closed, so that the battery interacts with the second power supply device for power supply through the first interface and the power pin.

10. The energy storage system according to claim 9, It is characterized in that The second power supply device is provided with a second controller and a second power switch; The second controller is connected to the second power switch, and the first controller is also used to communicate with the second controller when the second interface, the signal pin and the second power supply device form a control loop, so that the second controller controls the second power switch to turn on.

Images