Energy storage system, control method and control device thereof and readable storage medium

Abstract

The invention provides an energy storage system and a control method and device thereof, and a readable storage medium. The energy storage system comprises an energy storage device; the inverter is connected with the energy storage equipment, and the inverter is used for being connected to an alternating current power supply; the flyback power supply circuit is arranged on the inverter; the activation circuit is connected with the flyback power supply circuit; wherein under the condition that the flyback power supply circuit is connected to an alternating current power supply, the flyback power supply circuit is used for supplying power to the activation circuit, so that the activation circuit generates an activation signal; and the controller is connected to the inverter and the activation circuit, and the controller is used for controlling the inverter to transmit the electric energy provided by the alternating current power supply to the energy storage equipment under the condition that the activation signal is received. According to the energy storage system provided by the invention, under the condition that the inverter is connected to the power supply, charging is automatically started, so that manual control is not needed, control through a battery management system is also not needed, and the convenience in the charging process of the energy storage equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage equipment, and in particular to an energy storage system and a control method, a control device and a readable storage medium thereof. Background Art

[0002] In the related art, the energy storage battery will charge and discharge its internal battery during operation according to the actual application scenario. When the battery discharges completely, that is, the power in the battery is insufficient and needs to be charged, most products require the user to manually press a button to start charging, or first run the battery management system (BMS) of the energy storage battery, and then start charging the energy storage battery under the control of the BMS, which causes inconvenience to the charging process. Summary of the invention

[0003] The present invention aims to at least solve the technical problem of the inconvenience of the charging and starting process of the energy storage battery existing in the prior art.

[0004] To this end, a first aspect of the present invention provides an energy storage system.

[0005] A second aspect of the present invention provides a control method for an energy storage system.

[0006] A third aspect of the present invention provides a control device for an energy storage system.

[0007] A fourth aspect of the present invention provides a readable storage medium.

[0008] The present invention provides an energy storage system, comprising: an energy storage device; an inverter connected to the energy storage device, the inverter being used to be connected to an AC power supply; a flyback power supply circuit, arranged in the inverter; an activation circuit connected to the flyback power supply circuit; wherein, when the flyback power supply circuit is connected to the AC power supply, the flyback power supply circuit is used to supply power to the activation circuit so that the activation circuit generates an activation signal; a controller, connected to the inverter and the activation circuit, the controller being used to control the inverter to transmit the electric energy provided by the AC power supply to the energy storage device when receiving the activation signal.

[0009] The energy storage system provided by the present invention includes an energy storage device and an inverter, wherein the energy storage device is used to store electric energy to supply power to electric devices. When the energy storage device is discharged, that is, when the electric energy stored in the energy storage device is insufficient, it needs to be charged. Specifically, during the charging process, it is necessary to connect to an AC power source through an inverter, and process the electric energy provided by the AC power source, convert the AC power provided by the AC power source into DC power, and then transmit the DC power to the energy storage device, that is, the electric energy is transmitted to the energy storage device, so as to charge the energy storage device.

[0010] Furthermore, the energy storage system also includes a flyback power supply circuit and an activation circuit, wherein the flyback power supply circuit is arranged in the inverter, and when the energy storage device needs to be charged, the inverter is connected to the AC power supply, and at the same time, the flyback power supply circuit is also connected to the AC power supply, at which time, the flyback power supply circuit can convert the AC power provided by the AC power supply, that is, convert the high-voltage AC power provided by the AC power supply into low-voltage DC power, so as to supply power to the activation circuit. Furthermore, when the activation circuit receives the power supply from the flyback power supply circuit, it can generate an activation signal, and the activation signal can be used to activate the charging process of the energy storage device.

[0011] Specifically, the energy storage system also includes a controller, which is connected to the activation circuit and the inverter. The controller is used to control the operation process of the energy storage system, such as controlling the power, current and other parameters of the charging and discharging process of the energy storage system to ensure the normal operation of the energy storage system. When the activation circuit generates an activation signal, the activation signal is transmitted to the controller. When the controller receives the activation signal generated by the activation circuit, the controller can control the operation of the inverter so that the inverter converts the AC power provided by the AC power supply into DC power and transmits it to the energy storage device to charge the energy storage device. In this way, when the inverter is connected to the power supply, it can automatically start charging the energy storage device without manual control through buttons or control through the battery management system, thereby improving the convenience of the energy storage device during charging.

[0012] The energy storage system provided by the present invention is provided with a flyback power supply circuit and an activation circuit. When the energy storage device needs to be charged, the inverter is connected to the power supply, and the flyback power supply circuit is also connected to the AC power supply, so that the flyback power supply circuit can supply power to the activation circuit, and then the activation circuit can generate an activation signal, and transmit the activation signal to the controller. When the controller receives the activation signal, the inverter can be controlled to convert the AC power provided by the AC power supply into DC power to charge the energy storage device, so as to realize automatic charging when the inverter is connected to the power supply, thereby eliminating the need for manual control and control through a battery management system, thereby improving the convenience of the energy storage device during charging.

[0013] In addition, the energy storage system in the above technical solution provided by the present invention may also have the following additional technical features:

[0014] In some technical schemes, optionally, the flyback power supply circuit includes: a rectifier unit, the input end of the rectifier unit is used to be connected to an AC power supply, and the rectifier unit is used to convert AC power into DC power; a transformer unit, the input end of the transformer unit is connected to the output end of the rectifier unit, and the output end of the transformer unit is connected to the activation circuit.

[0015] In some technical solutions, optionally, the transformer unit includes: a first coil connected to the output end of the rectifier unit; a second coil connected to the activation circuit, and the second coil is coupled to the first coil.

[0016] In some technical schemes, optionally, the transformer unit includes: a diode, a cathode of the diode being connected to the first output terminal of the second coil, and a cathode of the diode being connected to the activation circuit; a first capacitor, one end of the first capacitor being connected to the anode of the diode, and the other end of the first capacitor being connected to the second output terminal of the second coil; a first switch element, one end of the first switch element being connected to the first coil, and the other end of the first switch element being connected to the output terminal of the rectifier unit; and a control unit being connected to the control terminal of the first switch element, and being used to control the on and off of the first switch element at a preset frequency.

[0017] In some technical solutions, optionally, the flyback power supply circuit further includes: a second capacitor connected to the output end of the rectifying unit.

[0018] In some technical schemes, optionally, the activation circuit includes: a second switch element, a first end of the second switch element is connected to the output end of the flyback power supply circuit, and a second end of the second switch element is connected to a controller; wherein, when the flyback power supply circuit is connected to an AC power supply, the first end of the second switch element and the second end of the second switch element are conducted to generate an activation signal.

[0019] In some technical solutions, optionally, the activation circuit also includes: a third switch element, one end of the third switch element is connected to the control end of the second switch element, the other end of the third switch element is grounded, and the control end of the third switch element is connected to the controller; wherein, when the first end of the second switch element and the second end of the second switch element are conductive, the controller is used to control the conductive state of the third switch element so as to disconnect the first end of the second switch element and the second end of the second switch element.

[0020] In some technical solutions, optionally, the activation circuit further includes: a first current limiting resistor, which is arranged between the first end of the second switch element and the control end of the second switch element.

[0021] In some technical solutions, optionally, the activation circuit further includes: a second current limiting resistor, which is arranged between the control end of the third switch element and the controller.

[0022] According to a second aspect of the present invention, a control method for an energy storage system is proposed, which is used for an energy storage system such as any one of the above technical solutions. The control method includes: when the flyback power supply circuit is connected to the power supply, obtaining an activation signal of the activation circuit; when the activation signal is obtained, controlling the inverter to convert the AC power provided by the AC power supply into DC power and transmit it to the energy storage device; when the electric energy stored in the energy storage device is greater than or equal to a preset value, controlling the inverter to stop transmitting electric energy to the energy storage device.

[0023] The control method of the energy storage system provided by the present invention, by setting a flyback power supply circuit and an activation circuit, when the energy storage device needs to be charged, the inverter is connected to the power supply, and the flyback power supply circuit is also connected to the AC power supply, so that the flyback power supply circuit can supply power to the activation circuit, and then the activation circuit can generate an activation signal, and transmit the activation signal to the controller. When the controller receives the activation signal, the inverter can be controlled to convert the AC power provided by the AC power supply into DC power to charge the energy storage device, so as to realize automatic charging when the inverter is connected to the power supply, thereby eliminating the need for manual control and control through a battery management system, thereby improving the convenience of the energy storage device during charging.

[0024] According to a third aspect of the present invention, a control device for an energy storage system is proposed, which is used for an energy storage system as in any one of the above technical solutions, and the control device includes: an acquisition unit, which is used to acquire an activation signal of an activation signal circuit when the inverter is connected to a power supply; and a control unit, which is used to control the inverter to transmit electrical energy provided by the power supply to the energy storage device when the activation signal is acquired.

[0025] The control device of the energy storage system provided by the present invention, by setting a flyback power supply circuit and an activation circuit, connects the inverter to the power supply when the energy storage device needs to be charged, and the flyback power supply circuit is also connected to the AC power supply, so that the flyback power supply circuit can supply power to the activation circuit, and then the activation circuit can generate an activation signal, and transmit the activation signal to the controller. When the controller receives the activation signal, the inverter can be controlled to convert the AC power provided by the AC power supply into DC power to charge the energy storage device, so as to realize automatic charging when the inverter is connected to the power supply, thereby eliminating the need for manual control and control through a battery management system, thereby improving the convenience of the energy storage device during charging.

[0026] According to the fourth aspect of the present application, a readable storage medium is provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, a control method for an energy storage system as in any of the above technical solutions is implemented. Therefore, the readable storage medium has all the beneficial effects of the control method for an energy storage system in any of the above technical solutions, which will not be described in detail here.

[0027] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 A structural block diagram of an energy storage system according to an embodiment of the present invention is shown;

[0030] Figure 2 Shows Figure 1 Circuit diagram of the flyback power supply circuit and activation circuit;

[0031] Figure 3 A schematic flow chart showing a method for controlling an energy storage system according to an embodiment of the present invention is shown;

[0032] Figure 4 A structural block diagram of a control device for an energy storage system according to an embodiment of the present invention is shown.

[0033] in, Figure 1 , Figure 2 and Figure 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 100 energy storage system, 102 energy storage device, 104 inverter, 106 flyback power supply circuit, 108 activation circuit, 110 controller, 112 rectifier unit, 114 transformer unit, 116 first coil, 118 second coil, 120 diode, 122 first capacitor, 124 first switch element, 126 control unit, 128 second capacitor, 130 second switch element, 132 third switch element, 134 first current limiting resistor, 138 second current limiting resistor, 140 first switch tube, 142 second switch tube, 144 third switch tube, 146 fourth switch tube, 200 AC power supply, 400 control device of energy storage system, 402 acquisition unit, 404 control unit. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0037] Refer to the following Figures 1 to 4 The energy storage system and its control method, control device and readable storage medium provided according to some embodiments of the present invention are described.

[0038] The present invention provides an energy storage system 100, such as Figure 1 As shown, it includes: an energy storage device 102; an inverter 104, connected to the energy storage device 102, and the inverter 104 is used to be connected to the AC power supply 200; a flyback power supply circuit 106, which is arranged in the inverter 104; an activation circuit 108, which is connected to the flyback power supply circuit 106; wherein, when the flyback power supply circuit 106 is connected to the AC power supply 200, the flyback power supply circuit 106 is used to power the activation circuit 108 so that the activation circuit 108 generates an activation signal; a controller 110, connected to the inverter 104 and the activation circuit 108, and the controller 110 is used to control the inverter 104 to transmit the electric energy provided by the AC power supply 200 to the energy storage device 102 when receiving the activation signal.

[0039] The energy storage system 100 provided by the present invention includes an energy storage device 102 and an inverter 104, wherein the energy storage device 102 is used to store electric energy to supply power to electric devices. When the energy storage device 102 is discharged, that is, when the electric energy stored in the energy storage device 102 is insufficient, it needs to be charged. Specifically, during the charging process, it is necessary to connect to the AC power supply 200 through the inverter 104, and process the electric energy provided by the AC power supply 200, convert the AC power provided by the AC power supply 200 into DC power, and then transmit the DC power to the energy storage device 102, that is, the electric energy is transmitted to the energy storage device 102, so as to charge the energy storage device 102.

[0040] Furthermore, the energy storage system 100 further includes a flyback power supply circuit 106 and an activation circuit 108, wherein the flyback power supply circuit 106 is arranged in the inverter 104, and when the energy storage device 102 needs to be charged, the inverter 104 is connected to the AC power supply 200, and at the same time, the flyback power supply circuit 106 is also connected to the AC power supply 200, at which time, the flyback power supply circuit 106 can convert the AC power provided by the AC power supply 200, that is, convert the high-voltage AC power provided by the AC power supply 200 into low-voltage DC power, so as to supply power to the activation circuit 108. Furthermore, when the activation circuit 108 receives the power supply from the flyback power supply circuit 106, it can generate an activation signal, and the activation signal can be used to activate the charging process of the energy storage device 102.

[0041] Specifically, the energy storage system 100 further includes a controller 110, which is connected to the activation circuit 108 and the inverter 104. The controller 110 is used to control the operation process of the energy storage system 100, such as controlling the power, current and other parameters of the charging and discharging process of the energy storage system 100, to ensure the normal operation of the energy storage system 100. When the activation circuit 108 generates an activation signal, the activation signal is transmitted to the controller 110. When the controller 110 receives the activation signal generated by the activation circuit 108, the controller 110 can control the inverter 104 to operate, so that the inverter 104 converts the AC power provided by the AC power supply 200 into DC power, and transmits it to the energy storage device 102, so as to charge the energy storage device 102. In this way, when the inverter 104 is connected to the power supply, it can automatically start charging the energy storage device 102, without the need for manual control through buttons, and without the need for control through a battery management system, thereby improving the convenience of the energy storage device 102 during charging.

[0042] The energy storage system 100 provided by the present invention is provided with a flyback power supply circuit 106 and an activation circuit 108. When the energy storage device 102 needs to be charged, the inverter 104 is connected to the power supply, and the flyback power supply circuit 106 is also connected to the AC power supply 200, so that the flyback power supply circuit 106 can supply power to the activation circuit 108, and then the activation circuit 108 can generate an activation signal and transmit the activation signal to the controller 110. When the controller 110 receives the activation signal, the inverter 104 can be controlled to convert the AC power provided by the AC power supply 200 into DC power to charge the energy storage device 102, so that charging is automatically started when the inverter 104 is connected to the power supply, thereby eliminating the need for manual control and control through a battery management system, thereby improving the convenience of the energy storage device 102 during charging.

[0043] In some embodiments, optionally, Figure 2 As shown, the flyback power supply circuit 106 includes: a rectifier unit 112, the input end of the rectifier unit 112 is used to be connected to the AC power supply 200, and the rectifier unit 112 is used to convert AC power into DC power; a transformer unit 114, the input end of the transformer unit 114 is connected to the output end of the rectifier unit 112, and the output end of the transformer unit 114 is connected to the activation circuit 108.

[0044] In the embodiment of the present application, the flyback power supply circuit 106 may include a rectifier unit 112 and a transformer unit 114, wherein the input end of the rectifier unit 112 is used to connect to the AC power supply 200, and the AC power can be converted into DC power through the rectifier unit 112. Further, the input end of the transformer unit 114 is connected to the output end of the rectifier unit 112, and the high-voltage DC power output by the rectifier unit 112 can be converted into low-voltage DC power through the transformer unit 114, and then transmitted to the activation circuit 108 through the output end of the transformer unit 114, thereby providing a low-voltage power supply for the activation circuit 108 to ensure that the activation circuit 108 can operate normally.

[0045] Specifically, the rectifier unit 112 may include two rectifier bridge arms, each of which may include two switch tubes, specifically a first switch tube 140, a second switch tube 142, a third switch tube 144 and a fourth switch tube 146. After the rectifier unit 112 is connected to the AC power supply 200, in the positive half-cycle of the AC power, the current passes through the second switch tube 142 and the third switch tube 144 to provide DC power, and in the negative half-cycle of the AC power, the current passes through the first switch tube 140 and the fourth switch tube 146 to provide DC power, thereby providing continuous DC power to the activation circuit 108.

[0046] In some embodiments, optionally, the transformer unit 114 includes: a first coil 116 connected to the output end of the rectifying unit 112 ; a second coil 118 connected to the activation circuit 108 , and the second coil 118 is coupled to the first coil 116 .

[0047] In this embodiment, the voltage transformation unit 114 may include a first coil 116 and a second coil 118. The first coil 116 is connected to the rectifying unit 112. Through the coupling connection between the first coil 116 and the second coil 118, the high voltage direct current provided by the rectifying unit 112 may be converted into low voltage direct current, and output through the second coil 118. Specifically, the number of turns of the first coil 116 and the second coil 118 may be set to adjust the specific value of the low voltage direct current, thereby ensuring the normal operation of the activation circuit 108.

[0048] In some embodiments, optionally, the transformer unit 114 also includes: a diode 120, wherein the cathode of the diode 120 is connected to the first output end of the second coil 118, and the anode of the diode 120 is connected to the activation circuit 108; a first capacitor 122, wherein one end of the first capacitor 122 is connected to the anode of the diode 120, and the other end of the first capacitor 122 is connected to the second output end of the second coil 118; a first switch element 124, wherein one end of the first switch element 124 is connected to the first coil 116, and the other end of the first switch element 124 is connected to the output end of the rectifier unit 112; and a control unit 126, which is connected to the control end of the first switch element 124 and is used to control the on and off of the first switch element 124 at a preset frequency.

[0049] In this embodiment, the transformer unit 114 may further include a diode 120, a first capacitor 122, a first switch 124, and a control unit 126. The cathode of the diode 120 is connected to the first output end of the second coil 118, and the anode of the diode 120 is connected to the activation circuit 108. The low voltage direct current may be transmitted to the activation circuit 108 through the diode 120. One end of the first capacitor 122 is connected to the anode of the diode 120, and the other end of the first capacitor 122 is connected to the second output end of the second coil 118. Through the first capacitor 122, electric energy may be stored during the operation of the transformer unit 114, thereby ensuring the continuity of the current provided to the activation circuit 108. Furthermore, one end of the first switch element 124 is connected to the first coil 116, and the other end of the first switch element 124 is connected to the output end of the rectifier unit 112. The control unit 126 can control the switching state of the first switch element 124. Specifically, the control unit 126 is connected to the control end of the first switch element 124, and can control the on and off of the first switch element 124 at a preset frequency, thereby realizing continuous power conversion between the first coil 116 and the second coil 118, so as to continuously provide low-voltage direct current to the activation circuit 108.

[0050] The operation process of the transformer unit 114 is as follows: First, the winding polarities of the first coil 116 and the second coil 118 are opposite. After the transformer unit 114 is connected to the output end of the rectifier unit 112, the first switch 124 is controlled to be turned on and off at a preset frequency by the control unit 126. When the first switch 124 is turned on, the current in the first coil 116 begins to rise. At this time, since the winding polarities of the first coil 116 and the second coil 118 are opposite, the diode 120 is turned off, the first coil 116 and the second coil 118 store energy, and the activation circuit 108 is provided with electric energy by the first capacitor 122. When the first switch 124 is turned off, the current direction of the first coil 116 is opposite, and the diode 120 is turned on at this time. The electric energy stored in the second coil 118 is transmitted to the activation circuit 108 through the diode 120 to realize power supply for the activation circuit 108. At the same time, the first capacitor 122 is charged to supplement the lost electric energy, so that when the first switch 124 is turned on, the activation circuit 108 is powered by the first capacitor 122 .

[0051] In some embodiments, optionally, the flyback power supply circuit 106 further includes: a second capacitor 128 , and the second capacitor 128 is connected to the output end of the rectifying unit 112 .

[0052] In this embodiment, the flyback power supply circuit 106 may further include a second capacitor 128, and the second capacitor 128 is arranged at the output end of the rectifier unit 112, so that the direct current output by the rectifier unit 112 can be filtered to filter out interference signals in the current output by the rectifier unit 112, thereby avoiding the interference signals from affecting the operation of the activation circuit 108 and ensuring that the activation circuit 108 can operate normally.

[0053] Specifically, the second capacitor 128 is connected in parallel to two output terminals of the rectifying unit 112 , that is, one terminal of the second capacitor 128 is connected to one output terminal of the rectifying unit 112 , and the other terminal of the second capacitor 128 is connected to the other output terminal of the rectifying unit 112 .

[0054] In some embodiments, optionally, the activation circuit 108 includes: a second switch element 130, a first end of the second switch element 130 is connected to the output end of the flyback power supply circuit 106, and a second end of the second switch element 130 is connected to the controller 110; wherein, when the flyback power supply circuit 106 is connected to the AC power supply 200, the first end of the second switch element 130 and the second end of the second switch element 130 are conductive to generate an activation signal.

[0055] In this embodiment, the activation circuit 108 may include a second switch element 130, and two ends of the second switch element 130 are respectively connected to the output end of the flyback power supply circuit 106 and the controller 110, wherein the second switch element 130 can be set so that the second switch element 130 is in a conductive state by default. When the flyback power supply circuit 106 is connected to the AC power supply 200, the flyback power supply circuit 106 provides a low-voltage DC power supply for the activation circuit 108. At this time, since the two ends of the second switch element 130 are in a conductive state, the DC power supply will be transmitted to the controller 110 through the second switch element 130, that is, the controller 110 receives the activation signal of the activation circuit 108, and the controller 110 can control the operation of the inverter 104 to charge the energy storage device 102.

[0056] In some embodiments, optionally, the activation circuit 108 also includes: a third switch element 132, one end of the third switch element 132 is connected to the control end of the second switch element 130, the other end of the third switch element 132 is grounded, and the control end of the third switch element 132 is connected to the controller 110; wherein, when the first end of the second switch element 130 and the second end of the second switch element 130 are conductive, the controller 110 is used to control the conductive state of the third switch element 132 so as to disconnect the first end of the second switch element 130 and the second end of the second switch element 130.

[0057] In this embodiment, the activation circuit 108 may further include a third switch 132, which is connected to the control end of the second switch 130, so that the on and off of the second switch 130 can be controlled by controlling the on and off of the third switch 132. That is, the second switch 130 is controlled to stop transmitting low-voltage current to the controller 110. Without disconnecting the AC power supply 200, the activation circuit 108 can be controlled to stop running, thereby reducing the overall energy consumption of the energy storage device 102.

[0058] Specifically, the first end of the third switch element 132 is connected to the control end of the second switch element 130, the second end of the third switch element 132 is grounded, and the control end of the third switch element 132 is connected to the controller 110. After the activation power circuit is connected to the AC power supply 200, the two ends of the second switch element 130 are turned on, and the controller 110 starts to control the inverter 104 to operate and charge the energy storage device 102. At this time, the controller 110 can control the level change of the control end of the third switch element 132 to change the conduction state between the first end and the second end of the third switch element 132, so that the first end and the second end of the second switch element 130 are disconnected. At this time, the second switch element 130 no longer transmits low-voltage direct current to the controller 110, that is, no longer generates an activation signal. Therefore, without disconnecting the AC power supply 200, the activation circuit 108 can also be controlled to stop running, thereby reducing the overall energy consumption of the energy storage device 102.

[0059] In some embodiments, optionally, the activation circuit 108 further includes: a first current limiting resistor 134 disposed between the first end of the second switch element 130 and the control end of the second switch element 130 .

[0060] In this embodiment, the activation circuit 108 may further include a first current limiting resistor 134 arranged between the control end of the second switch element 130 and the first end of the second switch element 130. Through the first current limiting resistor 134, voltage stabilization can be achieved between the control end of the second switch element 130 and the first end of the second switch element 130 to avoid changes in the conduction state between the first end and the second end of the second switch element 130 caused by voltage fluctuations, thereby ensuring the stable operation of the second switch element 130.

[0061] In some embodiments, optionally, the activation circuit 108 further includes: a second current limiting resistor 138 disposed between the control end of the third switch element 132 and the controller 110 .

[0062] In this embodiment, a second current limiting resistor 138 may also be provided between the control end of the third switch element 132 and the controller 110, so that the current between the controller 110 and the control end of the third switch element 132 is limited by the second current limiting resistor 138, thereby preventing the third switch element 132 from being subjected to current shocks, thereby further improving the operating stability of the third switch element 132.

[0063] In some embodiments of the present invention, Figure 3 As shown, a control method of an energy storage system is also proposed, which is used for an energy storage system as in any one of the above embodiments. The control method of the energy storage system includes:

[0064] Step 302: When the inverter is connected to a power source, obtaining an activation signal of an activation circuit;

[0065] Step 304: When the activation signal is obtained, the inverter is controlled to convert the AC power provided by the power source into DC power, and transmit the DC power to the energy storage device.

[0066] In this embodiment, when the energy storage device 102 needs to be charged, the inverter 104 is connected to the AC power source 200, and the flyback power supply circuit 106 is connected to the AC power source 200. The flyback power supply circuit 106 converts the AC power provided by the AC power source 200, and converts the high-voltage AC power provided by the AC power source 200 into low-voltage DC power, so as to supply power to the activation circuit 108. Further, when the activation circuit 108 receives the power from the flyback power supply circuit 106, it can generate an activation signal. When the controller 110 receives the activation signal generated by the activation circuit 108, the controller 110 can control the inverter 104 to operate, so that the inverter 104 converts the AC power provided by the AC power source 200 into DC power, and transmits it to the energy storage device 102, so as to charge the energy storage device 102.

[0067] In some embodiments, optionally, the control method further includes: when the electric energy stored in the energy storage device is greater than or equal to a preset value, controlling the inverter to stop transmitting electric energy to the energy storage device.

[0068] In this embodiment, the controller 110 can monitor the remaining power in the energy storage device 102 in real time during the charging process of the energy storage device 102, that is, monitor the amount of electric energy stored in the energy storage device 102. Specifically, when the controller 110 detects that the electric energy stored in the energy storage device 102 is greater than or equal to a preset value, the controller 110 can control the inverter 104 to stop supplying power to the energy storage device 102, thereby completing the charging process of the energy storage device 102.

[0069] Specifically, the controller 110 may be a battery management system (BMS), through which the operation process of the energy storage device 102 may be monitored and controlled to ensure stable operation of the energy storage device 102 .

[0070] In some embodiments of the present invention, Figure 4 As shown, a control device 400 for an energy storage system is also proposed, which is used for an energy storage system 100 as any one of the above technical solutions. The control device 400 for the energy storage system includes: an acquisition unit 402, which is used to acquire an activation signal of the activation circuit 108 when the inverter 104 is connected to the AC power supply 200; and a control unit 404, which is used to control the inverter 104 to transmit the electric energy provided by the AC power supply 200 to the energy storage device 102 when the activation signal is acquired.

[0071] The control device 400 of the energy storage system provided by the present invention connects the inverter 104 to the AC power source 200 when the energy storage device 102 needs to be charged, so that the activation circuit 108 can generate an activation signal and transmit the activation signal to the controller 110. When the controller 110 receives the activation signal, the inverter 104 can be controlled to transmit the electric energy provided by the AC power source 200 to the energy storage device 102. Specifically, the AC power provided by the AC power source 200 can be converted into DC power and provided to the energy storage device 102, or the DC power provided by the AC power source 200 can be processed and then transmitted to the energy storage device 102 to charge the energy storage device 102, so as to realize automatic charging when the inverter 104 is connected to the power source, thereby eliminating the need for manual control and improving the convenience of the energy storage device 102 during charging.

[0072] Furthermore, the control unit 404 is further configured to control the inverter 104 to stop transmitting electric energy to the energy storage device 102 when the electric energy stored in the energy storage device 102 is greater than or equal to a preset value.

[0073] In some embodiments of the present invention, a readable storage medium is also proposed, on which a program or instruction is stored, and when the program or instruction is executed by a processor, a control method for an energy storage system as in any of the above technical solutions is implemented. Therefore, the readable storage medium has all the beneficial effects of the control method for an energy storage system in any of the above technical solutions, which will not be described in detail here.

[0074] In some embodiments, in some embodiments, the energy storage system 100 can be a household energy storage power supply device or a balcony photovoltaic energy storage system. Among them, the household energy storage power supply device is usually relatively large, its position after installation is relatively fixed and cannot be moved, the power capacity is relatively large, and the power provided is relatively large; while the balcony photovoltaic energy storage power supply device is relatively small and easy to carry and move, and can be moved according to the user's power demand, such as from the balcony to the garage or even outdoors, etc., the power capacity is relatively small, and the power provided is also relatively small.

[0075] In some embodiments, the energy storage system 100 may also be an outdoor portable energy storage device that can output AC power for outdoor use.

[0076] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy storage system, characterized in that: include: Energy storage equipment; An inverter connected to the energy storage device, the inverter being used to connect to an AC power source; A flyback power supply circuit is provided in the inverter; An activation circuit connected to the flyback power supply circuit; Wherein, when the flyback power supply circuit is connected to an AC power supply, the flyback power supply circuit is used to supply power to the activation circuit so that the activation circuit generates an activation signal; A controller is connected to the inverter and the activation circuit, and is used to control the inverter to transmit the electric energy provided by the AC power supply to the energy storage device when receiving the activation signal.

2. The energy storage system according to claim 1, characterized in that: The flyback power supply circuit comprises: A rectifier unit, wherein the input end of the rectifier unit is used to be connected to an AC power source, and the rectifier unit is used to convert AC power into DC power; A voltage transformation unit, wherein the input end of the voltage transformation unit is connected to the output end of the rectification unit, and the output end of the voltage transformation unit is connected to the activation circuit.

3. The energy storage system according to claim 2, characterized in that: The transformer unit comprises: A first coil connected to an output end of the rectifier unit; The second coil is connected to the activation circuit, and the second coil is coupled to the first coil.

4. The energy storage system according to claim 3, characterized in that: The transformer unit further comprises: a diode, wherein a cathode of the diode is connected to the first output terminal of the second coil, and an anode of the diode is connected to the activation circuit; a first capacitor, one end of the first capacitor being connected to the anode of the diode, and the other end of the first capacitor being connected to the second output end of the second coil; a first switch element, one end of which is connected to the first coil, and the other end of which is connected to the output end of the rectifying unit; A control unit is connected to the control end of the first switch element and is used to control the first switch element to be turned on and off at a preset frequency.

5. The energy storage system according to claim 2, characterized in that: The flyback power supply circuit also includes: A second capacitor is connected to an output end of the rectifying unit.

6. The energy storage system according to any one of claims 1 to 5, characterized in that: The activation circuit comprises: a second switch element, wherein a first end of the second switch element is connected to an output end of the flyback power supply circuit, and a second end of the second switch element is connected to the controller; Wherein, when the flyback power supply circuit is connected to an AC power supply, the first end of the second switch element and the second end of the second switch element are conducted to generate the activation signal.

7. The energy storage system according to claim 6, characterized in that: The activation circuit further comprises: a third switch element, one end of the third switch element is connected to the control end of the second switch element, the other end of the third switch element is grounded, and the control end of the third switch element is connected to the controller; Wherein, when the first end of the second switch element and the second end of the second switch element are conductive, the controller is used to control the conductive state of the third switch element to disconnect the first end of the second switch element and the second end of the second switch element.

8. The energy storage system according to claim 7, characterized in that: The activation circuit further comprises: The first current limiting resistor is arranged between the first end of the second switch element and the control end of the second switch element.

9. The energy storage system according to claim 7, characterized in that: The activation circuit further comprises: The second current limiting resistor is arranged between the control end of the third switch element and the controller.

10. A control method for an energy storage system, used in the energy storage system according to any one of claims 1 to 9, characterized in that: The control method comprises: When the flyback power supply circuit is connected to a power supply, obtaining the activation signal of the activation circuit; When the activation signal is obtained, the inverter is controlled to convert the AC power provided by the AC power source into DC power and transmit the DC power to the energy storage device.

11. The control method according to claim 10, characterized in that: Also includes: When the electric energy stored in the energy storage device is greater than or equal to a preset value, the inverter is controlled to stop transmitting electric energy to the energy storage device.

12. A control device for an energy storage system, used in the energy storage system according to any one of claims 1 to 9, characterized in that: The control device comprises: an acquisition unit, configured to acquire the activation signal of the activation signal circuit when the inverter is connected to a power source; A control unit is used to control the inverter to transmit the electric energy provided by the power supply to the energy storage device when the activation signal is obtained.

13. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the method according to claim 10 or 11 are implemented.

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