Inverter charging and discharging fast switching circuit, control method thereof and storage medium

Abstract

The invention discloses an inverter charging and discharging fast switching circuit and a control method thereof, and a storage medium, based on a combined topology of a first charging and discharging unit, a second charging and discharging unit, a power factor input loop and an inversion output loop, stable grid-connected voltage input can be provided for the charging and discharging units; therefore, the inverter can work for a long time under the control working condition that charging and discharging are to be switched, online charging and energy storage of the energy storage equipment are achieved, effective and reliable charging and discharging control can be carried out in cooperation with the charging and discharging unit, and especially under the condition that it is determined that the power grid is to be switched from the online state to the offline state, the energy storage efficiency is improved. The working states of the power factor input loop and the inversion output loop are configured to be the first preset loop state, and the first charging and discharging unit is controlled to stop working and the second charging and discharging unit is controlled to work in the inversion mode, so that the inverter realizes rapid charging and discharging switching after the power grid is powered down, and it is ensured that the energy storage equipment is always in a good operation state.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronic circuits, and in particular to an inverter charging and discharging fast switching circuit and a control method thereof, an energy storage device, and a computer-readable storage medium. Background Art

[0002] The inverter switches between online charging and off-grid discharging application scenarios in order to protect the data security of the load equipment and prevent the load equipment from being damaged by power failure, which is especially important for some medical equipment and database management equipment. At present, when the inverters on the market are switching between charging and discharging, they cannot charge the energy storage device because they work in the grid-connected mode. If the inverter is in the discharging working condition for a long time, the energy storage device will continuously lose energy and cannot work in the grid-connected mode for a long time. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the present invention proposes an inverter charging and discharging fast switching circuit and its control method and storage medium, which can work in the grid-connected mode for a long time to facilitate the inverter charging and discharging fast switching.

[0004] In a first aspect, an embodiment of the present invention provides an inverter charging and discharging fast switching circuit, comprising: A first charge and discharge unit, a second charge and discharge unit, a power factor input circuit, an inverter output circuit and a bus capacitor; wherein the first charge and discharge unit is respectively connected to the bus capacitor, the output end of the power factor input circuit and an input end of the inverter output circuit, the second charge and discharge unit is respectively connected to the bus capacitor and the other input end of the inverter output circuit, the input end of the power factor input circuit is connected to the grid voltage, and the output end of the inverter output circuit is connected to the load; the power factor input circuit is used to provide grid voltage input to the first charge and discharge unit, and the inverter output circuit is used to cooperate with the first charge and discharge unit and the second charge and discharge unit to perform fast charge and discharge switching.

[0005] Optionally, in one embodiment of the present invention, the power factor input circuit includes a first switching element and a second switching element, the inverter output circuit includes a third switching element, a fourth switching element, a fifth switching element and a sixth switching element, the first charging and discharging unit is respectively connected to the live wire end of the grid voltage through the first switching element, connected to the neutral wire end of the grid voltage through the second switching element, and connected to the first live wire end of the load through the third switching element, the second charging and discharging unit is respectively connected to the neutral wire end of the grid voltage through the second switching element, connected to the second live wire end of the load through the fourth switching element, and connected to the neutral wire end of the load through the fifth switching element, and the first live wire end and the second live wire end of the load are connected through the sixth switching element.

[0006] In a second aspect, an embodiment of the present invention provides a control method for the inverter charge and discharge fast switching circuit as described in the first aspect, wherein the inverter charge and discharge fast switching circuit is configured in an energy storage device, and the method includes: Conduct real-time detection of the online and offline status of the power grid to obtain status detection results; When the status detection result indicates that the power grid is about to switch from an online state to an offline state, the working states of the power factor input circuit and the inverter output circuit are configured as a first preset circuit state, and the first charging and discharging unit is controlled to stop working and the second charging and discharging unit is controlled to work in an inverter mode, wherein the first preset circuit state corresponds to the energy storage device in a first discharge state.

[0007] Optionally, in one embodiment of the present invention, the method further includes: When the state detection result indicates that the power grid is in an online state to be switched, the working states of the power factor input circuit and the inverter output circuit are configured as a second preset circuit state, and the first charging and discharging unit is controlled to work in a power factor correction mode and the second charging and discharging unit is controlled to work in an inverter mode, wherein the second preset circuit state corresponds to the energy storage device in the first charging state; or, When the state detection result indicates that the power grid is in an online state that has not been switched yet, the working states of the power factor input circuit and the inverter output circuit are configured to be a third preset circuit state, and the first charging and discharging unit is controlled to work in a power factor correction mode and the second charging and discharging unit stops working, wherein the second preset circuit state corresponds to the energy storage device in the second charging state; or, When the status detection result indicates that the power grid is in an offline state, the working states of the power factor input circuit and the inverter output circuit are configured as a fourth preset circuit state, and the first charge and discharge unit is controlled to work in an inverter mode and the second charge and discharge unit is controlled to work in an inverter mode, wherein the fourth preset circuit state corresponds to the energy storage device in the second discharge state.

[0008] Optionally, in one embodiment of the present invention, in the first preset loop state, the first switch element and the second switch element are both switched from a closed state to an open state, the fourth switch element, the fifth switch element and the sixth switch element are all in a closed state, and the third switch element is in an open state.

[0009] Optionally, in one embodiment of the present invention, in the second preset loop state, the first switch element and the second switch element are both in a closed state, the fourth switch element, the fifth switch element and the sixth switch element are all in a closed state, and the third switch element is in an open state; In the third preset loop state, the first switch element and the second switch element are both in a closed state, and the third switch element, the fourth switch element, the fifth switch element and the sixth switch element are all in an open state; In the fourth preset loop state, the first switch element and the second switch element are both in an open state, the third switch element, the fourth switch element and the fifth switch element are all in a closed state, and the sixth switch element is in an open state.

[0010] In a third aspect, an embodiment of the present invention provides an energy storage device, including: at least one processor; at least one memory for storing at least one program; When at least one of the programs is executed by at least one of the processors, the control method of the inverter charging and discharging fast switching circuit as described in the second aspect is implemented.

[0011] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores a program executable by a processor, and when the program executable by the processor is executed by the processor, it is used to implement the control method of the inverter charging and discharging fast switching circuit as described in the second aspect.

[0012] The present invention proposes an inverter fast charging and discharging switching circuit and its control method and storage medium. Based on the combined topology of the first charging and discharging unit, the second charging and discharging unit, the power factor input circuit and the inverter output circuit, it can not only provide a stable grid-connected voltage input for the charging and discharging unit, but also enable the inverter to work for a long time under the control condition of charging and discharging to be switched, and realize online charging and energy storage of the energy storage device, so as to cooperate with the charging and discharging unit to perform effective and reliable charging and discharging control. In particular, when it is determined that the power grid is switched from the online state to the offline state, the working state of the power factor input circuit and the inverter output circuit is configured to the first preset circuit state, and the first charging and discharging unit is controlled to stop working and the second charging and discharging unit is controlled to work in the inverter mode, so that the inverter can realize fast charging and discharging switching after the power grid is powered off, ensuring that the energy storage device is always in a good operating state. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a principle block diagram of an inverter charging and discharging fast switching circuit provided by an embodiment of the present invention; Figure 2 It is a topological principle diagram of an inverter charging and discharging fast switching circuit provided by an embodiment of the present invention; Figure 3 is a flow chart of a control method of an inverter charging and discharging fast switching circuit provided by an embodiment of the present invention; Figure 4 It is a structural schematic diagram of an energy storage device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0014] 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.

[0015] It should be noted that although the functional modules are divided in the device schematic and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart.

[0016] Figure 1 This is a principle block diagram of an inverter charging and discharging fast switching circuit provided in one embodiment of the present invention.

[0017] Reference Figure 1 The inverter charging and discharging fast switching circuit specifically includes but is not limited to: A first charge and discharge unit 100, a second charge and discharge unit 200, a power factor input circuit 300, an inverter output circuit 400 and a bus capacitor C1; wherein the first charge and discharge unit 100 is respectively connected to the bus capacitor C1, the output end of the power factor input circuit 300 and an input end of the inverter output circuit 400, the second charge and discharge unit 200 is respectively connected to the bus capacitor C1 and the other input end of the inverter output circuit 400, the input end of the power factor input circuit 300 is connected to the grid voltage, and the output end of the inverter output circuit 400 is connected to the load; the power factor input circuit 300 is used to provide grid voltage input to the first charge and discharge unit 100, and the inverter output circuit 400 is used to cooperate with the first charge and discharge unit 100 and the second charge and discharge unit 200 to perform fast charge and discharge switching, wherein the specifications, parameters, etc. of the bus capacitor C1 can be set accordingly according to the actual application scenario, and there is no limitation here; It can be seen that the combined topology based on the first charge and discharge unit 100, the second charge and discharge unit 200, the power factor input circuit 300 and the inverter output circuit 400 can not only provide a stable grid-connected voltage input for the charge and discharge unit, but also enable the inverter to work for a long time under the control condition of charge and discharge switching, and realize online charging and energy storage of the energy storage device, so as to cooperate with the charge and discharge unit to carry out effective and reliable charge and discharge control.

[0018] It should be noted that the inverter charge and discharge fast switching circuit provided in this embodiment can be applicable to, but not limited to, various power application scenarios in which inverters are connected to the mains grid. However, no matter what kind of power application scenario, such as small energy storage, UPS and other fields, once the load equipment mains grid loses power, it can be based on the inverter charge and discharge fast switching circuit provided in this embodiment to perform 0ms fast switching of charge and discharge, thereby entering the off-grid mode and outputting the corresponding voltage to power the load equipment.

[0019] In one embodiment, if Figure 2 As shown, the power factor input circuit may include but is not limited to a first switch element S1 and a second switch element S2, wherein the first switch element S1 and the second switch element S2 are controlled by the grid input, the inverter output circuit may include but is not limited to a third switch element S3, a fourth switch element S4, a fifth switch element S5 and a sixth switch element S6, the first charge and discharge unit (i.e. Figure 2 The topology 1 shown in FIG. 1 is connected to the live terminal L of the grid voltage through the first switching element S1, connected to the neutral terminal of the grid voltage through the second switching element S2, and connected to the first live terminal L1 of the load through the third switching element S3. The second charging and discharging unit (i.e. Figure 2The topology 2) shown in the figure is respectively connected to the neutral terminal of the grid voltage through the second switching element S2, connected to the second live terminal L2 of the load through the fourth switching element S4, and connected to the neutral terminal of the load through the fifth switching element S5, and the first live terminal L1 and the second live terminal L2 of the load are connected through the sixth switching element S6. It can be understood that the neutral terminal of the AC side grid voltage and the neutral terminal of the load can be regarded as zero potential, which is equivalent to any reference ground.

[0020] It should be noted that the specific structures, parameters, etc. of the first charging and discharging unit and the second charging and discharging unit can be set according to the corresponding devices selected in different scenarios, and are not limited here. For example, the first charging and discharging unit is Figure 2 The topology 1 shown in FIG. 1 may be, but is not limited to, a PFC (power factor correction) topology. The second charge and discharge unit is Figure 2 The topology 2 shown in the figure can be, but is not limited to, an INV (inverter) topology, etc. In the PFC topology and the INV topology, corresponding switching devices can be, but are not limited to, set to achieve effective on or off of the PFC topology and the INV topology. The switching devices can be, but are not limited to, MOSFET, IGBT or GaN devices, etc., wherein the PFC topology and the INV topology belong to the relevant prior art known to those skilled in the art, and are not described herein to avoid redundancy; the first switching element S1, the second switching element S2, the third switching element S3, the fourth switching element S4, the fifth switching element S5 and the sixth switching element S6 can be, but are not limited to, button switches, key switches, toggle switches, relay switches, remote control switches or isolating switches, etc., which are not limited here.

[0021] In one embodiment, if Figure 2 As shown, the inverter charging and discharging fast switching circuit may also include but is not limited to a protection element F1, which is arranged between the first switching element S1 and the live wire terminal L of the grid voltage to ensure that the grid voltage is stably input into the first charging and discharging unit through the first switching element S1, preventing related devices on the branch from suffering voltage damage, thereby playing a good protective role. Specifically, it may be but is not limited to using a fuse, an air switch, etc., which is not limited here.

[0022] The inverter charge and discharge fast switching circuit and application scenario described in the embodiment of the present invention are intended to more clearly illustrate the technical solution of the embodiment of the present invention, and do not constitute a limitation on the technical solution provided by the embodiment of the present invention. Those skilled in the art can know that with the evolution of the inverter charge and discharge fast switching circuit and the emergence of new application scenarios, the technical solution provided by the embodiment of the present invention is also applicable to similar technical problems.

[0023] It can be understood by those skilled in the art that Figure 1 or Figure 2 The inverter charging and discharging fast switching circuit shown does not constitute a limitation on the embodiments of the present invention, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0024] Based on the circuit topology of the inverter charging and discharging fast switching circuit, various embodiments of the control method of the present invention are proposed.

[0025] Figure 3 This is a flow chart of a control method for an inverter charging and discharging fast switching circuit provided by an embodiment of the present invention. The control method can be applied to, but is not limited to, Figure 1 or Figure 2 The inverter charging and discharging fast switching circuit shown, specifically, the inverter charging and discharging fast switching circuit can be but is not limited to being configured in an energy storage device; Figure 3 As shown, the control method specifically includes but is not limited to steps S1000 to S2000.

[0026] Step S1000: Perform real-time detection on the online and offline status of the power grid to obtain status detection results; Step S2000: When the status detection result indicates that the power grid is about to switch from an online state to an offline state, the working states of the power factor input circuit and the inverter output circuit are configured to be a first preset circuit state, and the first charge and discharge unit is controlled to stop working and the second charge and discharge unit is controlled to work in the inverter mode, wherein the first preset circuit state corresponds to the energy storage device in the first discharge state.

[0027] In this step, when it is determined that the power grid is to be switched from the online state to the offline state, the working state of the power factor input circuit and the inverter output circuit is configured as the first preset circuit state, and the first charging and discharging unit is controlled to stop working and the second charging and discharging unit is controlled to work in the inverter mode, so that the inverter can achieve fast switching of charging and discharging after the power grid is powered off, ensuring that the energy storage device is always in a good operating state. In the first preset circuit state, the first switch element S1 and the second switch element S2 are switched from the closed state to the open state, the fourth switch element S4, the fifth switch element S5 and the sixth switch element S6 are all in the closed state, and the third switch element S3 is in the open state. That is to say, combined with Figure 2As shown, when the power grid starts working in the online state, the first switch element S1 and the second switch element S2 are both in the closed state. When the power grid switches from the online working state to be switched to the offline working state, the AC port of the power grid loses power, the input of topology 1 is disconnected, and topology 1 stops working, and it no longer charges the bus capacitor C1. Since the 0ms charge and discharge switching control mode is turned on at this time, the fourth switch element S4, the fifth switch element S5 and the sixth switch element S6 are still in the closed state, the third switch element S3 is in the open state, and topology 2 works in the inverter mode at this time. That is, in this case, topology 1 stops working, topology 2 is in the discharge state, and the entire energy storage device works in a discharge state corresponding to a scenario.

[0028] In one embodiment of the present invention, the control method of the inverter charging and discharging fast switching circuit may also include but is not limited to steps S3000, S4000 or S5000.

[0029] Step S3000: When the state detection result indicates that the power grid is in an online state to be switched, the working state of the power factor input circuit and the inverter output circuit is configured as a second preset circuit state, and the first charge and discharge unit is controlled to work in a power factor correction mode and the second charge and discharge unit is controlled to work in an inverter mode, wherein the second preset circuit state corresponds to the energy storage device in the first charging state; or, Step S4000: When the state detection result indicates that the power grid is in an online state that has not yet been switched, the working states of the power factor input circuit and the inverter output circuit are configured to be a third preset circuit state, and the first charging and discharging unit is controlled to work in a power factor correction mode and the second charging and discharging unit stops working, wherein the second preset circuit state corresponds to the energy storage device in the second charging state; or, Step S5000: When the status detection result indicates that the power grid is in an offline state, the working states of the power factor input circuit and the inverter output circuit are configured to be a fourth preset circuit state, and the first charge and discharge unit is controlled to work in the inverter mode and the second charge and discharge unit is controlled to work in the inverter mode, wherein the fourth preset circuit state corresponds to the energy storage device in the second discharge state.

[0030] In this step, the actual operation status of the power grid specifically represented by the status detection result is judged to configure the working status of the power factor input circuit and the inverter output circuit to a reasonable preset circuit status accordingly, and at the same time, the first charging and discharging unit and the second charging and discharging unit are controlled to work in the required working mode accordingly, so as to facilitate the inverter charging and discharging 0ms fast switching, ensuring that the energy storage device is always in a good operating state.

[0031] Specifically, combined Figure 2 It can be seen that when the state detection result indicates that the power grid is in an online state to be switched, it means that the 0ms charge and discharge switching control mode has been turned on at this time, and the first switch element S1, the second switch element S2, the fourth switch element S4, the fifth switch element S5 and the sixth switch element S6 are still in a closed state. At this time, the voltage of the first live wire terminal L1 of the load is equal to the voltage of the second live wire terminal L2 of the load. Then the grid voltage charges the bus capacitor C1 through topology 1, and topology 2 discharges and outputs the corresponding ground voltage to the first live wire terminal L1 and the second live wire terminal L2 of the load. At this time, topology 1 works in power factor correction mode, topology 2 works in inverter mode, topology 1 charges the entire energy storage device, and the entire energy storage device works in a charging state corresponding to a scenario.

[0032] Combination Figure 2 It can be seen that when the state detection result indicates that the power grid is in an online state that has not been switched yet, indicating that the 0ms charge and discharge switching control mode is not turned on at this time, the fourth switch element S4, the fifth switch element S5 and the sixth switch element S6 are all in a disconnected state, and only the first switch element S1 and the second switch element S2 are in a closed state. The bus capacitor C1 is charged through topology 1. At this time, topology 2 does not work, and topology 1 works in power factor correction mode. Topology 1 charges the entire energy storage device, and the entire energy storage device works in a charging state corresponding to another scenario.

[0033] Combination Figure 2 It can be seen that when the status detection result indicates that the power grid is in an offline state, it means that there is no voltage at the AC port of the power grid at this time. At this time, the first switch element S1 and the second switch element S2 are disconnected, and topology 1 and topology 2 work in the inverter mode at the same time. At this time, the bus capacitor C1 is discharged, the third switch element S3, the fourth switch element S4 and the fifth switch element S5 are all closed, and the sixth switch element S6 is disconnected. Topology 1 and topology 2 are loaded at the same time, that is, in this working mode, topology 1 and topology 2 are both in a discharging state, and the entire energy storage device works in a discharging state corresponding to another scenario.

[0034] It can be seen that the control method of the inverter charging and discharging fast switching circuit provided in the embodiment of the present invention not only has the function of fast switching output of the energy storage device off-grid in 0ms after the power grid is powered off, but also charges and stores energy when the grid is online, and can work for a long time under the working condition of the 0ms charging and discharging switching control mode. In the off-grid state, topology 1 and topology 2 work in the inverter mode at the same time to enhance the load capacity of the energy storage device.

[0035] Figure 4 FIG. 1 is a schematic diagram of the structure of an energy storage device 1000 provided in one embodiment of the present invention. Figure 4As shown, the energy storage device 1000 includes a memory 1100 and a processor 1200. The number of the memory 1100 and the processor 1200 can be one or more. Figure 4 In the embodiment, a memory 1100 and a processor 1200 are taken as an example; the memory 1100 and the processor 1200 in the device may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0036] The memory 1100, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the control method of the inverter charging and discharging fast switching circuit provided by any embodiment of the present invention. The processor 1200 implements the control method of the inverter charging and discharging fast switching circuit by running the software programs, instructions and modules stored in the memory 1100.

[0037] The memory 1100 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function. In addition, the memory 1100 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 1100 may further include a memory remotely arranged relative to the processor 1200, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0038] An embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for executing a control method for an inverter charging and discharging fast switching circuit as provided in any embodiment of the present invention.

[0039] An embodiment of the present invention further provides a computer program product, including a computer program or computer instructions, wherein the computer program or computer instructions are stored in a computer-readable storage medium, a processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes a control method for an inverter charging and discharging fast switching circuit as provided in any embodiment of the present invention.

[0040] The energy storage device and application scenario described in the embodiment of the present invention are intended to more clearly illustrate the technical solution of the embodiment of the present invention, and do not constitute a limitation on the technical solution provided by the embodiment of the present invention. Those skilled in the art will appreciate that with the evolution of energy storage devices and the emergence of new application scenarios, the technical solution provided by the embodiment of the present invention is also applicable to similar technical problems.

[0041] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0042] In hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0043] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process or an execution thread, and a component may be located on a computer or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may communicate, for example, through local or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, or a network, such as the Internet interacting with other systems through signals).

Claims

1. An inverter charging and discharging fast switching circuit, characterized in that: include: A first charge and discharge unit, a second charge and discharge unit, a power factor input circuit, an inverter output circuit and a bus capacitor; wherein the first charge and discharge unit is respectively connected to the bus capacitor, the output end of the power factor input circuit and an input end of the inverter output circuit, the second charge and discharge unit is respectively connected to the bus capacitor and the other input end of the inverter output circuit, the input end of the power factor input circuit is connected to the grid voltage, and the output end of the inverter output circuit is connected to the load; the power factor input circuit is used to provide grid voltage input to the first charge and discharge unit, and the inverter output circuit is used to cooperate with the first charge and discharge unit and the second charge and discharge unit to perform fast charge and discharge switching.

2. The inverter charging and discharging fast switching circuit according to claim 1, characterized in that: The power factor input circuit includes a first switch element and a second switch element, the inverter output circuit includes a third switch element, a fourth switch element, a fifth switch element and a sixth switch element, the first charge and discharge unit is respectively connected to the live wire end of the grid voltage through the first switch element, connected to the neutral wire end of the grid voltage through the second switch element, and connected to the first live wire end of the load through the third switch element, the second charge and discharge unit is respectively connected to the neutral wire end of the grid voltage through the second switch element, connected to the second live wire end of the load through the fourth switch element, and connected to the neutral wire end of the load through the fifth switch element, and the first live wire end and the second live wire end of the load are connected through the sixth switch element.

3. A control method for the inverter charging and discharging fast switching circuit as claimed in claim 2, characterized in that: The inverter charging and discharging fast switching circuit is configured in an energy storage device, and the method includes: Conduct real-time detection of the online and offline status of the power grid to obtain status detection results; When the status detection result indicates that the power grid is about to switch from an online state to an offline state, the working states of the power factor input circuit and the inverter output circuit are configured as a first preset circuit state, and the first charging and discharging unit is controlled to stop working and the second charging and discharging unit is controlled to work in an inverter mode, wherein the first preset circuit state corresponds to the energy storage device in a first discharge state.

4. The control method according to claim 3, characterized in that: The method further comprises: When the state detection result indicates that the power grid is in an online state to be switched, the working states of the power factor input circuit and the inverter output circuit are configured as a second preset circuit state, and the first charging and discharging unit is controlled to work in a power factor correction mode and the second charging and discharging unit is controlled to work in an inverter mode, wherein the second preset circuit state corresponds to the energy storage device in the first charging state; or, When the state detection result indicates that the power grid is in an online state that has not been switched yet, the working states of the power factor input circuit and the inverter output circuit are configured to be a third preset circuit state, and the first charging and discharging unit is controlled to work in a power factor correction mode and the second charging and discharging unit stops working, wherein the second preset circuit state corresponds to the energy storage device in the second charging state; or, When the status detection result indicates that the power grid is in an offline state, the working states of the power factor input circuit and the inverter output circuit are configured as a fourth preset circuit state, and the first charge and discharge unit is controlled to work in an inverter mode and the second charge and discharge unit is controlled to work in an inverter mode, wherein the fourth preset circuit state corresponds to the energy storage device in the second discharge state.

5. The control method according to claim 3, characterized in that: In the first preset loop state, the first switch element and the second switch element are switched from a closed state to an open state, the fourth switch element, the fifth switch element and the sixth switch element are all in a closed state, and the third switch element is in an open state.

6. The control method according to claim 4, characterized in that: In the second preset loop state, the first switch element and the second switch element are both in a closed state, the fourth switch element, the fifth switch element and the sixth switch element are all in a closed state, and the third switch element is in an open state; In the third preset loop state, the first switch element and the second switch element are both in a closed state, and the third switch element, the fourth switch element, the fifth switch element and the sixth switch element are all in an open state; In the fourth preset loop state, the first switch element and the second switch element are both in an open state, the third switch element, the fourth switch element and the fifth switch element are all in a closed state, and the sixth switch element is in an open state.

7. An energy storage device, characterized in that: include: at least one processor; at least one memory for storing at least one program; When at least one of the programs is executed by at least one of the processors, the control method of the inverter charging and discharging fast switching circuit as described in any one of claims 3 to 6 is implemented.

8. A computer-readable storage medium, characterized in that: A program executable by a processor is stored therein, and when the program executable by the processor is executed by the processor, it is used to implement the control method of the inverter charging and discharging fast switching circuit as described in any one of claims 3 to 6.

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