Energy storage system

Abstract

The invention relates to the technical field of energy storage power supplies, in particular to an energy storage system which comprises a first power supply device, a connector and a second power supply device, the second end of the connector is electrically connected with the second power supply device, the first end of the connector is provided with a first plug, and the first plug is provided with a signal pin and a power pin. The length of the signal pin is smaller than that of the power pin, and when the first plug is plugged with the first power device and the first power device is electrically connected with the signal pin, it is determined that communication between the first power device and the second power device succeeds. At the moment, the second power supply device or the first power supply device responds to a 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. On the basis, power supply interaction is carried out after successful communication, so that the condition of surge impact current generated by electrified access or electric leakage caused by electrified pull-out during hot plugging is prevented, and the reliability of the energy storage system is further improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to an energy storage system. Background Art

[0002] Due to its own size and weight limitations, the battery capacity of mobile energy storage power supplies is usually small and cannot meet the demand for large-capacity batteries outdoors. Therefore, when used outdoors, it is necessary to use a battery pack 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. Therefore, when expanding the capacity of the energy storage power supply, the entire system of the energy storage power supply and the battery pack needs to support the hot-plugging requirements of the connecting cable.

[0003] However, the existing technology uses mechanical locks, which leads to high cost and low reliability of the energy storage power supply. Summary of the invention

[0004] The embodiment of the present invention provides an energy storage system, aiming to solve the technical problems of high cost and low reliability when the existing energy storage power source is expanded.

[0005] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present invention is: providing an energy storage system, including a first power supply device, a connector and a second power supply device, the second end of the connector is electrically connected to the second power supply device, the first end of the connector is provided with a first plug, the first plug is provided with a signal pin and a power pin, the length of the signal pin is shorter than the length of the power pin, when the first plug is plugged into 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.

[0006] Optionally, the first power supply device includes a socket, a detection circuit, a first controller, a battery and a first power switch;

[0007] 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;

[0008] The socket is provided with a first interface and a second interface. When the first 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 close, so that the battery interacts with the second power supply device for power supply through the first interface and the power pin.

[0009] Optionally, the first controller is further used to control the first power switch to disconnect when it is not detected that the second interface, the signal pin, and the second power supply device form a control loop, thereby stopping power supply interaction with the second power supply device.

[0010] Optionally, the first controller outputs a first control signal to the first controller in response to the second interface forming a control loop with the signal pin and the second power supply device, so that the first controller controls the first power switch to close according to the first control signal; and outputs a second control signal to the first controller when it is not detected that the second interface forms a control loop with the signal pin and the second power supply device, so that the first controller controls the first power switch to open according to the second control signal.

[0011] Optionally, the second power supply device is provided with a second controller and a second power switch;

[0012] The second controller is connected to the second power switch, and the first controller is further configured to communicate with the second controller upon receiving the first control signal, so that the second controller controls the second power switch to be turned on.

[0013] Optionally, there are two signal pins, and the second power supply device is provided with a short-circuit wire, and when the second power supply device is electrically connected to the connector, the short-circuit wire is used to short-circuit the two signal pins;

[0014] One end of the second interface is used to connect to one of the signal pins, the battery and the first controller, and the other end of the second interface is used to connect to another of the signal pins and the ground. The first controller controls the first power switch to turn on in response to the power supply circuit formed by the battery, one of the signal pins, the short-circuit wire and the other signal pin.

[0015] Optionally, when the socket and the first plug are plugged into a first position, the first interface is electrically connected to the power pin, and the second interface is electrically connected to the signal pin;

[0016] When the socket and the first plug are plugged into the second position, the first interface is electrically connected to the power pin, and the second interface is not electrically connected to the signal pin;

[0017] When the socket and the first plug are plugged into a third position, the first interface is not electrically connected to the power pin, and the second interface is not electrically connected to the signal pin.

[0018] Optionally, the plug is provided with a protrusion, and the socket is provided with a rotation groove and an insertion groove, the rotation groove is connected to the insertion groove, and when the plug is plugged into the socket, the protrusion slides on the rotation groove and the insertion groove.

[0019] Optionally, the first position is that the protrusion is located at an end of the plug-in slot away from the rotation slot;

[0020] The second position is that the protrusion is located at an end where the plug-in slot and the rotation slot are connected;

[0021] The third position is when the protrusion is located at an end of the rotation slot away from the plug-in slot.

[0022] Optionally, a second plug is provided at the second end of the connector, and a signal pin and a power pin are provided on the second plug. The length of the signal pin on the second plug is shorter than the length of the power pin on the second plug. The second end of the connector is electrically connected to the second power supply device through the second plug.

[0023] Different from the related art, the present invention provides an energy storage system, including a first power supply device, a connector and a second power supply device, the second end of the connector is electrically connected to the second power supply device, the first end of the connector is provided with a first plug, the first plug is provided with a signal pin and a power pin, the length of the signal pin is shorter than the length of the power pin, when the first plug is plugged into the first power supply device and the first power supply device is electrically connected to the signal pin, it is determined that the first power supply device and the second power supply device communicate successfully. 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 interact with the second power supply device through the power pin for power supply. Based on this, power supply interaction is performed after the first power supply device and the second power supply device communicate successfully, thereby preventing the surge impact current generated by the live connection moment or the leakage caused by the live removal during hot plugging, thereby improving the reliability of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 is a schematic diagram of an application scenario of an energy storage system provided by an embodiment of the present invention;

[0026] Figure 2 is a structural block diagram of a first power supply device provided by an embodiment of the present invention;

[0027] Figure 3 is a structural block diagram of a second power supply device provided by an embodiment of the present invention;

[0028] Figure 4a is a schematic diagram of a plug provided by an embodiment of the present invention;

[0029] Figure 4b is a schematic diagram of a signal detection principle provided by an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a socket provided by an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of a plug and a socket provided by an embodiment of the present invention;

[0032] Figure 7 It is a side view of a plug provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Among them, Figure 1 As shown, the energy storage system 1 includes a first power supply device 100, a connector 200 and a second power supply device 300. The second end of the connector 200 is electrically connected to the second power supply device 300, and the first end of the connector 200 is provided with a first plug 21a, and the first plug 21a is provided with a signal pin 211 and a power pin 212, and the length of the signal pin 211 is shorter than the length of the power pin 212. When the first plug 21a is plugged into 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 interact with the second power supply device 300 through the power pin 212 for power supply.

[0038] 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 is 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 and the connector 200 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.

[0039] 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.

[0040] Specifically, the connector 200 includes a first plug 21a, and the first plug 21a has a signal pin 211 and a power pin 212. When the first plug 21a is plugged into the first power supply device 100, the first power supply device 100 will determine whether the communication with the second power supply device 300 is successful through the signal pin 211, and after determining that the communication with the second power supply device 300 is successful, the first power supply device 100 outputs a voltage to the second power supply device 300 through the power pin 212 to expand the capacity of the second power supply device 300.

[0041] 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 and the connector 200, 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, receive 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.

[0042] 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.

[0043] 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 socket 11, a detection circuit 12, a first controller 13, a battery 14 and a first power switch 15;

[0044] The detection circuit 12 is connected to the socket 11 and the first controller 13 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;

[0045] The socket 11 is provided with a first interface 111 and a second interface 112. When the first plug 21a is plugged into 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, it 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.

[0046] Specifically, when the capacity of the second power supply device 300 needs to be expanded, the first plug 21a will be plugged into the socket 11, so that the first power supply device 100 is connected to the second power supply device 300. When the first plug 21a is plugged into the socket 11, since the length of the signal pin 211 of the first plug 21a is shorter than the length of the power pin 212, the power pin 212 will first contact the first interface 111. 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 detects 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 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.

[0047] 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.

[0048] 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.

[0049] 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 detected that the second interface 112, the signal pin 211, and the second power supply device 300 do not form a control loop, the first controller 13 will receive a second control signal and control the first power supply switch 15 to disconnect according to the second control signal, thereby causing the first power supply device 100 to stop supplying power to the second power supply device 300.

[0050] 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.

[0051] 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;

[0052] 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.

[0053] 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.

[0054] 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.

[0055] In yet another embodiment, Figure 1As shown, the second end of the connector 200 is provided with a second plug 21b, and the second plug 21b is also provided with a signal pin 211 and a power pin 212. The length of the signal pin 211 on the second plug 21b is shorter than the length of the power pin 212 on the second plug 21b. The second end of the connector 200 is electrically connected to the second power supply device 300 through the second plug 21b.

[0056] Specifically, when the second plug 21b is plugged into the second power supply device 300 and the second power supply device 300 is electrically connected to the signal pin 211 of the second plug 21b, the second power supply device 300 will detect whether the signal pin 211 of the first plug 21a and the signal pin 211 of the second plug 21b are communicating successfully. If the signal pin 211 of the first plug 21a and the signal pin 211 of the second plug 21b are communicating successfully, it is considered that the first power supply device 100 and the second power supply device 300 are connected successfully through the connector 200. At this time, the second power supply device 300 will perform power supply interaction with the first power supply device 100 through the power pin 212 of the second plug 21b and the power pin 212 of the first plug 21a.

[0057] 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, the first plug 21 a and the second plug 21 b each include two signal pins 211 .

[0058] 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 the two signal pins 211 on the second plug 21b.

[0059] 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 first plug 21a, 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 first plug 21a 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.

[0060] Specifically, two signal lines are provided on each of the first plug 21a and the second plug 21b. When the first power supply device 100 and the second power supply device 300 need to interact with each other in power supply, the first plug 21a is plugged into the first power supply device 100 and the signal pin 211 of the first plug 21a is electrically connected to the first power supply device 100, and the second plug 21b is plugged into the second power supply device 300 and the signal pin 211 of the second plug 21b 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 second plug 21b, the signal pin 211 of the second plug 21b will be short-circuited. At this time, the first controller 13 detects a low-level signal through the signal pin 211 of the first plug 21a and the signal pin 211 of the second plug 21b, and controls 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 second plug 21b is disconnected from the second power supply device 300, the signal pin 211 of the first plug 21a, the signal pin 211 of the second plug 21b and the battery 14 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.

[0061] 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 FIG. 1 is a schematic diagram of a plug and a socket 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. It should be noted that the structures of the first plug 21a and the second plug 21b are similar. In the embodiment of the present application, the plug 21 may be one of the first plug 21a and the second plug 21b. In some other embodiments, a third plug (not shown in the figure), a fourth plug (not shown in the figure) and a fifth plug (not shown in the figure) with similar structures may also be included. The plug 21 in the embodiment of the present application may also be one of the first plug 21a, the second plug 21b, the third plug 21c, the fourth plug 21d and the fifth plug 21e.

[0062] 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.

[0063] 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 .

[0064] 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 .

[0065] 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.

[0066] 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;

[0067] 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;

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 in the embodiment of the present application, a first plug 21a and a second plug 21b are included, and the plug-in and unplugging process of the first plug 21a and the second plug 21b and the socket 11 is similar to the plug-in and unplugging process of the plug 21 and the socket 11, and will not be repeated in this embodiment.

[0073] An embodiment of the present invention provides an energy storage system, including a first power supply device, a connector, and a second power supply device, wherein the second end of the connector is electrically connected to the second power supply device, a first plug is provided at the first end of the connector, a signal pin and a power pin are provided on the first plug, and the length of the signal pin is shorter than the length of the power pin. When the first plug is plugged into the first power supply device and the first power supply device is electrically connected to the signal pin, it is determined that the first power supply device and the second power supply device communicate successfully. 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 interact with the second power supply device through the power pin for power supply. Based on this, power supply interaction is performed after the first power supply device and the second power supply device communicate successfully, thereby preventing the surge current generated by the live connection moment or the leakage caused by the live removal during hot plugging, thereby improving the reliability of the energy storage system.

[0074] 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. An energy storage system, comprising a first power supply device, a connector and a second power supply device, characterized in that; The second end of the connector is electrically connected to the second power supply device, and the first end of the connector is provided with a first plug, and the first plug is provided with a signal pin and a power pin, and the length of the signal pin is shorter than the length of the power pin. When the first plug is plugged into 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.

2. The energy storage system according to claim 1, characterized in that: The first power supply device includes a socket, 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 first 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 close, so that the battery interacts with the second power supply device for power supply through the first interface and the power pin.

3. The energy storage system according to claim 2, characterized in that: The first controller is further configured to control the first power switch to be disconnected when it is not detected that the second interface, the signal pin, and the second power supply device form a control loop, thereby stopping power supply interaction with the second power supply device.

4. The energy storage system according to claim 3, characterized in that: In response to the second interface forming a control loop with the signal pin and the second power supply device, the first controller outputs a first control signal to the first controller, so that the first controller controls the first power switch to close according to the first control signal; and when it is not detected that the second interface forms a control loop with the signal pin and the second power supply device, the first controller outputs a second control signal to the first controller, so that the first controller controls the first power switch to open according to the second control signal.

5. The energy storage system according to claim 4, 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 further configured to communicate with the second controller upon receiving the first control signal, so that the second controller controls the second power switch to be turned on.

6. The energy storage system according to claim 2, characterized in that: There are two signal pins, and the second power supply device is provided with a short-circuit wire. When the second power supply device is electrically connected to the connector, the short-circuit wire is used to short-circuit the two signal pins; One end of the second interface is used to connect to one of the signal pins, the battery and the first controller, and the other end of the second interface is used to connect to another of the signal pins and the ground. The first controller controls the first power switch to turn on in response to the power supply circuit formed by the battery, one of the signal pins, the short-circuit wire and the other signal pin.

7. The energy storage system according to claim 2, characterized in that: When the socket and the first plug are plugged into a first position, the first interface is electrically connected to the power pin, and the second interface is electrically connected to the signal pin; When the socket and the first plug are plugged into the second position, the first interface is electrically connected to the power pin, and the second interface is not electrically connected to the signal pin; When the socket and the first plug are plugged into a third position, the first interface is not electrically connected to the power pin, and the second interface is not electrically connected to the signal pin.

8. The energy storage system according to claim 7, characterized in that: The plug is provided with a protrusion, and the socket is provided with a rotation groove and an insertion groove. The rotation groove is communicated with the insertion groove. When the plug is plugged in and out of the socket, the protrusion slides on the rotation groove and the insertion groove.

9. The energy storage system according to claim 8, characterized in that: The first position is that the protrusion is located at an end of the plug-in slot away from the rotation slot; The second position is that the protrusion is located at an end where the plug-in slot and the rotation slot are connected; The third position is when the protrusion is located at an end of the rotation slot away from the plug-in slot.

10. The energy storage system according to any one of claims 1 to 9, characterized in that: A second plug is provided at the second end of the connector, and a signal pin and a power pin are provided on the second plug. The length of the signal pin on the second plug is shorter than the length of the power pin on the second plug. The second end of the connector is electrically connected to the second power supply device through the second plug.

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