Energy storage system, control method of energy storage system, computer equipment and storage medium

Abstract

The invention relates to an energy storage system, a control method of the energy storage system, computer equipment and a storage medium, the energy storage system comprises a controller, an energy storage circuit and a switching device, the controller is connected with the energy storage circuit and the switching device, and the switching device comprises a first switching circuit, a second switching circuit and a third switching circuit; the energy storage circuit comprises a first energy storage sub-circuit and a second energy storage sub-circuit which are connected in series, the two ends of the first switching circuit are connected with the negative electrode of the first energy storage sub-circuit and the positive electrode of the second energy storage sub-circuit respectively, and the two ends of the second switching circuit are connected with the positive electrode of the first energy storage sub-circuit and the positive electrode of the second energy storage sub-circuit respectively. The two ends of the third switching circuit are connected with the negative electrode of the first energy storage sub-circuit and the negative electrode of the second energy storage sub-circuit respectively. The modes of the energy storage circuit are switched based on the switching device, and the installation and test workload of the energy storage system can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage systems, and in particular to an energy storage system, a control method for an energy storage system, a computer device, and a storage medium. Background Art

[0002] At present, with the application and development of power electronics technology and battery technology in power systems, energy storage systems are widely used in the construction of new power series because of their advantages such as peak load regulation and frequency regulation, and convenient grid connection of renewable energy.

[0003] Before the energy storage system is actually put into operation, it is necessary to install the energy storage system on the test operation platform to verify the long-term operation capacity, overload capacity and working conditions of each energy storage module in the energy storage system, and test the control system and fault protection function of each energy storage module. After the test is completed, the energy storage system is disassembled from the test operation platform and installed on the actual operation platform.

[0004] Since the high-voltage energy storage module is large in size and has many stages, the energy storage system needs to be disassembled and installed between the test operation platform and the actual operation platform, which results in a large installation and testing workload. Summary of the invention

[0005] Based on this, it is necessary to provide an energy storage system, a control method for the energy storage system, a computer device and a storage medium that can reduce the installation and testing workload in response to the above technical problems.

[0006] In a first aspect, the present application provides an energy storage system, the energy storage system comprising a controller, an energy storage circuit, and a switch device, the controller is connected to the energy storage circuit and the switch device, and the switch device comprises a first switch circuit, a second switch circuit, and a third switch circuit;

[0007] The energy storage circuit comprises a first energy storage subcircuit and a second energy storage subcircuit connected in series, wherein the first energy storage subcircuit and the second energy storage subcircuit respectively comprise energy storage devices, the energy storage devices comprise an energy storage module or at least two energy storage modules connected in series, and the energy storage module comprises a power unit and an energy storage unit connected in parallel with the power unit;

[0008] The two ends of the first switch circuit are respectively connected to the negative electrode of the first energy storage sub-circuit and the positive electrode of the second energy storage sub-circuit, the two ends of the second switch circuit are respectively connected to the positive electrode of the first energy storage sub-circuit and the positive electrode of the second energy storage sub-circuit, and the two ends of the third switch circuit are respectively connected to the negative electrode of the first energy storage sub-circuit and the negative electrode of the second energy storage sub-circuit.

[0009] In the technical solution of the embodiment of the present application, before the energy storage circuit is in the test operation mode, the energy storage circuit can be in the actual operation working mode or in other modes such as the non-power-on mode. If the energy storage circuit needs to be tested, the first switch circuit of the control switch device is turned off, and the second switch circuit and the third switch circuit are turned on, so that the energy storage circuit can be put into the test operation mode, and then the working condition of the tested circuit in the energy storage circuit can be tested. If there is no need to test the energy storage circuit, the first switch circuit of the control switch device is turned on, and the second switch circuit and the third switch circuit are turned off, so that the energy storage circuit can be put into the test actual operation mode. Therefore, there is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, which can reduce the installation and testing workload of the energy storage system.

[0010] In some embodiments, the energy storage circuit also includes a circuit breaker, a first end of the circuit breaker is connected between the second switch circuit and the positive pole of the first energy storage sub-circuit, and a second end of the circuit breaker is connected to the high-voltage positive bus, and / or, a first end of the circuit breaker is connected between the third switch circuit and the negative pole of the second energy storage sub-circuit, and a second end of the circuit breaker is connected to the high-voltage negative bus.

[0011] In the technical solution of the embodiment of the present application, the energy storage circuit and the high-voltage bus are connected through a circuit breaker to facilitate the controller to switch the energy storage circuit to the test operation mode and the grid-connected operation mode by controlling the second switch circuit and / or the third switch circuit. There is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, which can reduce the installation and testing workload of the energy storage system.

[0012] In some embodiments, the energy storage circuit further includes a reactor, and the reactor is connected in series to the positive electrode of the first energy storage sub-circuit and / or the negative electrode of the second energy storage sub-circuit.

[0013] In the embodiment of the present application, the short-circuit current of the first energy storage sub-circuit and the second energy storage sub-circuit is limited by the inductor, the voltage distribution on the first energy storage sub-circuit and the second energy storage sub-circuit is improved, and the high-order harmonics are limited and the harmonic interference is reduced, so as to realize the regulation of the voltage and current on the first energy storage sub-circuit and the second energy storage sub-circuit.

[0014] In some embodiments, the first energy storage subcircuit includes a companion test circuit, and the companion test circuit includes at least one energy storage module or at least one valve section in the first energy storage subcircuit;

[0015] The second energy storage subcircuit includes a tested circuit, and the tested circuit includes at least one energy storage module or at least one valve section in the second energy storage subcircuit.

[0016] In the technical solution of the embodiment of the present application, since the accompanying test circuit includes at least one energy storage module or at least one valve section in the first energy storage sub-circuit, and the tested circuit includes at least one energy storage module or at least one valve section in the second energy storage sub-circuit, various forms of tests can be performed on the energy storage system, not only a single energy storage module but also a valve section can be tested, and the test equipment can use the control and protection, reactors, measuring equipment, water cooling and background equipment of actual engineering, without adding additional equipment, thereby reducing the test cost.

[0017] In some embodiments, the energy storage system further includes an energy compensation circuit connected to the controller and the energy storage circuit.

[0018] In some embodiments, the energy compensation circuit includes a power supply and a fourth switch circuit, and the fourth switch circuit is connected to the power supply and the controller.

[0019] In the technical solution of the embodiment of the present application, the energy replenishment circuit includes a power supply and a fourth switching circuit. The implementation method of the energy replenishment circuit is simple. The controller can control the power supply based on the fourth switching circuit to charge the module that needs energy replenishment, and the control method is easy to implement.

[0020] In a second aspect, the present application provides a control method for an energy storage system, the control method being applied to the energy storage system according to any one of the first aspects, the control method comprising:

[0021] Controlling the first switch circuit to be turned off, and controlling the second switch circuit and the third switch circuit to be turned on, so as to control the first energy storage sub-circuit and the second energy storage sub-circuit to form a target loop;

[0022] When the first energy storage subcircuit and the second energy storage subcircuit form a target loop, the working condition of the tested circuit in the energy storage circuit is tested; the tested circuit includes the first energy storage subcircuit or the second energy storage subcircuit.

[0023] In some embodiments, when the first energy storage subcircuit and the second energy storage subcircuit form a target loop, testing the working condition of the circuit under test in the energy storage circuit includes:

[0024] Get the actual current parameters of the target circuit;

[0025] Based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested.

[0026] In the technical solution of the embodiment of the present application, the actual current parameters are determined based on the actual current parameters and the preset test current parameters of the test circuit, thereby completing the test of the working condition of the test circuit, making the test of the working condition of the test circuit more accurate.

[0027] In some embodiments, based on the actual current parameter and the preset test current parameter of the test circuit, testing the working condition of the test circuit includes:

[0028] If the actual current value of the target circuit is inconsistent with the test current value included in the preset test current parameters, the number of energy storage modules put into operation in the energy storage circuit and the accompanying test circuit is adjusted, and / or the input duration is adjusted to adjust the duty cycle of the energy storage modules put into operation to test the working condition of the circuit under test.

[0029] In the technical solution of the embodiment of the present application, when the actual current value is inconsistent with the test current value, the duty cycle of the energy storage modules put into operation is adjusted by adjusting the number of energy storage modules put into operation in the test circuit, and / or adjusting the duration of the put-in operation, so as to test the working condition of the test circuit more accurately.

[0030] In some embodiments, the method further comprises:

[0031] If the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency included in the preset test current parameters, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the accompanying test circuit to test the working condition of the test circuit.

[0032] In the technical solution of the embodiment of the present application, when the actual current fluctuation frequency is inconsistent with the test current fluctuation frequency, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the test circuit to test the working condition of the test circuit, so that the working condition of the test circuit is tested more accurately.

[0033] In some embodiments, the method further comprises:

[0034] The switching of the energy storage module in the test circuit is controlled according to the test current duty cycle included in the preset test current parameters to test the working condition of the test circuit.

[0035] In the technical solution of the embodiment of the present application, the switching of the test module in the test module is directly controlled according to the test current duty cycle to simulate the actual working condition, so as to test the working condition of the test circuit, making the test of the working condition of the test circuit more accurate.

[0036] In some embodiments, the method further comprises:

[0037] The first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit.

[0038] In the technical solution of the embodiment of the present application, the first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the test operation mode to the actual operation mode. The energy storage system can be put into the actual operation mode without disassembling the energy storage system multiple times, which solves the problem of large workload in installing and testing the energy storage system and reduces the time cost of testing the energy storage system. At the same time, since the energy storage system can be switched from the test operation mode to the actual operation mode, there is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, and there is no need to prepare a set of supporting equipment for the test operation platform, thereby saving the test cost, wherein the supporting equipment includes, for example, control and protection, reactors, measuring equipment, water cooling and background equipment.

[0039] In some embodiments, the energy storage system further includes an energy replenishment circuit, which is connected to the controller and the energy storage circuit; the method further includes:

[0040] Obtain the charge state of the energy storage module;

[0041] An energy storage module corresponding to a state of charge less than a preset state of charge is determined as a target module, and an energy replenishment circuit is controlled to charge the target module.

[0042] In the technical solution of the embodiment of the present application, an energy compensation circuit is used to charge the energy storage module corresponding to a charge state less than a preset charge state, so that the charge state of the energy storage module in the accompanying test circuit and the energy storage module in the tested circuit meet the preset charge state, laying a foundation for the subsequent testing of the working condition of the tested circuit in the energy storage circuit based on the test operation mode.

[0043] In some embodiments, the energy replenishment circuit includes a power supply and a fourth switch circuit, and the fourth switch circuit is connected to the power supply and the controller;

[0044] Controlling the energy replenishment circuit to charge the target module includes:

[0045] The fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using the power supply.

[0046] In the technical solution of the embodiment of the present application, when the fourth switch circuit is turned on, the power supply is used to charge the target module, the energy replenishment circuit is simple to implement, and the controller controls the power supply to charge the target module based on the fourth switch circuit, and the control method is easy to implement.

[0047] In a third aspect, the present application further provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method provided in the above embodiment when executing the computer program.

[0048] In a fourth aspect, the present application further provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method provided in the above embodiment are implemented.

[0049] In a fifth aspect, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the method provided in the above embodiment are implemented.

[0050] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0052] Figure 1 is a first structural schematic diagram of an energy storage system provided in an embodiment of the present application;

[0053] Figure 2 is a second structural schematic diagram of the energy storage system provided in an embodiment of the present application;

[0054] Figure 3 is a third structural schematic diagram of the energy storage system provided in an embodiment of the present application;

[0055] Figure 4 is a fourth structural schematic diagram of the energy storage system provided in an embodiment of the present application;

[0056] Figure 5 is a fifth structural schematic diagram of the energy storage system provided in an embodiment of the present application;

[0057] Figure 6 is a sixth structural schematic diagram of the energy storage system provided in an embodiment of the present application;

[0058] Figure 7 is a flow chart of a control method for an energy storage system provided in an embodiment of the present application;

[0059] Figure 8 It is a flow chart of another control method of an energy storage system provided in an embodiment of the present application;

[0060] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment.

[0061] Description of reference numerals:

[0062] 100. Energy storage system; 10. Controller; 20. Energy storage circuit;

[0063] 30. Switch device; 201. First energy storage sub-circuit; 202. Second energy storage sub-circuit;

[0064] 40. Circuit breaker; 50. Reactor; 60. Energy replenishment circuit;

[0065] K1, the first switch circuit; K2, the second switch circuit; K3, the third switch circuit;

[0066] 601, power supply; K4, fourth switch circuit. DETAILED DESCRIPTION

[0067] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0069] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0070] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0071] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0072] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0073] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0074] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0075] Before the energy storage system is actually put into operation, it needs to be installed on the test operation platform to verify the long-term operation capacity and overload capacity of the energy storage system. After the test is completed, the energy storage system is disassembled from the test operation platform and installed on the actual operation platform. However, the energy storage module is large in size and has many stages. The disassembly and installation of the energy storage system between the test operation platform and the actual operation platform has the problem of heavy installation and testing workload.

[0076] In order to solve the above problems, the present application provides an energy storage system, a control method for an energy storage system, a computer device and a storage medium. In the energy storage system provided by the present application, before the energy storage circuit is in the test operation mode, the energy storage circuit can be in the actual operation mode or in other modes such as the unpowered mode. If the energy storage circuit needs to be tested, the first switch circuit of the control switch device is turned off, and the second switch circuit and the third switch circuit are turned on, so that the energy storage circuit can be placed in the test operation mode, and then the working condition of the tested circuit in the energy storage circuit can be tested. If there is no need to test the energy storage circuit, the first switch circuit of the control switch device is turned on, and the second switch circuit and the third switch circuit are turned off, so that the energy storage circuit can be placed in the test actual operation mode. Therefore, there is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, which can reduce the installation and testing workload of the energy storage system.

[0077] Figure 1 is a first structural diagram of the energy storage system provided in the embodiment of the present application, such as Figure 1 As shown, the energy storage system includes a controller 10, an energy storage circuit 20, and a switch device 30. The controller 10 is connected to the energy storage circuit 20 and the switch device 30. The switch device 30 includes a first switch circuit K1, a second switch circuit K2, and a third switch circuit K3. The energy storage circuit 20 includes a first energy storage subcircuit 201 and a second energy storage subcircuit 202 connected in series. The first energy storage subcircuit 201 and the second energy storage subcircuit 202 respectively include energy storage devices. The energy storage devices include an energy storage module or at least two energy storage modules connected in series. The energy storage module includes a power unit and an energy storage unit connected in parallel with the power unit. The two ends of the first switch circuit K1 are respectively connected to the negative electrode of the first energy storage subcircuit 201 and the positive electrode of the second energy storage subcircuit 202. The two ends of the second switch circuit K2 are respectively connected to the positive electrode of the first energy storage subcircuit 201 and the positive electrode of the second energy storage subcircuit 202. The two ends of the third switch circuit K3 are respectively connected to the negative electrode of the first energy storage subcircuit 201 and the negative electrode of the second energy storage subcircuit 202.

[0078] In the embodiments of the present application, Figure 1 As shown, the energy storage system 100 includes a controller 10, an energy storage circuit 20, and a switch device 30. The controller 10 is connected to the energy storage circuit 20 and the switch device 30. The switch device 30 is connected to the energy storage circuit 20. The switch device 30 includes a first switch circuit K1, a second switch circuit K2, and a third switch circuit K3. Specifically, two ends of the first switch circuit K1 are respectively connected to the negative electrode of the first energy storage sub-circuit 201 and the positive electrode of the second energy storage sub-circuit 202, two ends of the second switch circuit K2 are respectively connected to the positive electrode of the first energy storage sub-circuit 201 and the positive electrode of the second energy storage sub-circuit 202, and two ends of the third switch circuit K3 are respectively connected to the negative electrode of the first energy storage sub-circuit 201 and the negative electrode of the second energy storage sub-circuit 202.

[0079] The energy storage circuit 20 includes a first energy storage subcircuit 201 and a second energy storage subcircuit 202 connected in series, and the first energy storage subcircuit 201 and the second energy storage subcircuit 202 each include an energy storage device, and the energy device includes an energy storage module or at least two energy storage modules connected in series. For example, the first energy storage subcircuit 201 includes energy storage modules SM1, energy storage modules SM2, and energy storage modules SM3, and the second energy storage subcircuit 202 includes energy storage modules SM4, energy storage modules SM5, and energy storage modules SM6.

[0080] Optionally, the energy storage system may further include a switch module, and the switch module and the switch device 30 divide the energy storage circuit 20 into a first energy storage sub-circuit, a second energy storage sub-circuit and a third energy storage sub-circuit.

[0081] The controller 10 can put the energy storage system 100 into different operation modes by controlling the switch device 30. Exemplarily, when the controller 10 controls the first switch circuit K1 to be disconnected and the second switch circuit K2 and the third switch circuit K3 to be turned on, the first energy storage subcircuit 201 and the second energy storage subcircuit 202 can be controlled to form a target loop, that is, the energy storage circuit 20 is controlled to be in a test operation mode; when the controller 10 controls the first switch circuit K1 to be turned on and the second switch circuit K2 and the third switch circuit K3 to be disconnected, the state of the series circuit formed by the first energy storage subcircuit 201 and the second energy storage subcircuit 202 can be controlled, that is, the energy storage circuit 20 is controlled to be in a non-test operation mode.

[0082] Optionally, the controller 10 can also simultaneously control the first switch circuit K1 , the second switch circuit K2 , the third switch circuit K3 and the switch module in the switch device 30 to put the energy storage system 100 into different operation modes.

[0083] Optionally, the first energy storage sub-circuit 201 can be the upper half or the lower half located above the switching device 30. If the first energy storage sub-circuit 201 is the upper half located above the switching device 30, the second energy storage sub-circuit 202 is the lower half located below the switching device 30; if the first energy storage sub-circuit 201 is the lower half located above the switching device 30, the second energy storage sub-circuit 202 is the upper half located above the switching device 30.

[0084] Optionally, the energy storage module may be an energy storage module composed of a half-bridge module or an energy storage module composed of a full-bridge module. Figure 1 The energy storage module shown in FIG. 1 is a half-bridge module. Figure 2 is a second structural schematic diagram of the energy storage system 100 provided in an embodiment of the present application, Figure 2The energy storage module shown in FIG. 1 is a full-bridge module. Both the half-bridge module and the full-bridge module can be based on a module composed of a DC capacitor and an insulated gate bipolar transistor (IGBT).

[0085] Optionally, the first switch circuit K1 , the second switch circuit K2 and the third switch circuit K3 may all be single-pole double-throw switches, circuit breakers, transistors, fuses and the like.

[0086] Optionally, the controller 10 may include a central processing unit (CPU), a field programmable gate array (FPGA), a complex programmable logic device (CPLD), a digital signal processing (DSP), a single-chip microcomputer and other controllers.

[0087] In the technical solution of the embodiment of the present application, before the energy storage circuit is in the test operation mode, the energy storage circuit can be in the actual operation working mode or in other modes such as the non-power-on mode. If the energy storage circuit needs to be tested, the first switch circuit of the control switch device is turned off, and the second switch circuit and the third switch circuit are turned on, so that the energy storage circuit can be put into the test operation mode, and then the working condition of the tested circuit in the energy storage circuit can be tested. If there is no need to test the energy storage circuit, the first switch circuit of the control switch device is turned on, and the second switch circuit and the third switch circuit are turned off, so that the energy storage circuit can be put into the test actual operation mode. Therefore, there is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, which can reduce the installation and testing workload of the energy storage system.

[0088] Figure 3 is a third structural diagram of the energy storage system provided in the embodiment of the present application, such as Figure 3 As shown, the energy storage circuit also includes a circuit breaker 40, a first end of the circuit breaker 40 is connected between the second switch circuit K2 and the positive electrode of the first energy storage sub-circuit 201, and a second end of the circuit breaker 40 is connected to the high-voltage positive bus, and / or, a first end of the circuit breaker 40 is connected between the third switch circuit K3 and the negative electrode of the second energy storage sub-circuit 202, and a second end of the circuit breaker 40 is connected to the high-voltage negative bus.

[0089] Optionally, the energy storage system may include only one circuit breaker or two circuit breakers 40. When the energy storage system includes only one circuit breaker 40, the circuit breaker 40 may be arranged above the first energy storage subcircuit 201. In this case, the first end of the circuit breaker 40 is connected between the second switch circuit K2 and the positive pole of the first energy storage subcircuit 201, and the second end of the circuit breaker 40 is connected to the positive pole of the high-voltage bus. The circuit breaker 40 may also be arranged below the second energy storage subcircuit 202. In this case, the first end of the circuit breaker 201 is connected between the third switch circuit K3 and the negative pole of the second energy storage subcircuit 202, and the second end of the circuit breaker 40 is connected to the negative pole of the high-voltage bus.

[0090] In the embodiment of the present application, when the energy storage system includes two circuit breakers, such as Figure 3 As shown, the circuit breaker 40 includes a first circuit breaker and a second circuit breaker. Figure 3 The circuit breaker and the reactor located above the first energy storage sub-circuit 201 are used as the first circuit breaker and the first reactor, and the circuit breaker and the reactor located below the second energy storage sub-circuit 202 are used as the second circuit breaker and the second reactor.

[0091] The first end of the first circuit breaker is connected between the second switch circuit K2 and the positive pole of the first energy storage sub-circuit 201, and the second end of the first circuit breaker is connected to the positive pole of the high-voltage bus; the first end of the second circuit breaker is connected between the third switch circuit K3 and the negative pole of the second energy storage sub-circuit 202, and the second end of the second circuit breaker is connected to the negative pole of the high-voltage bus.

[0092] When the first circuit breaker, the second circuit breaker and the first switch circuit K1 are turned off, and the second switch circuit K2 and the third switch circuit K3 are turned on, the current passes through the energy storage modules SM4, SM5 and SM6 in the second energy storage sub-circuit 202, and flows to the energy storage modules SM3, SM2 and SM1 in the first energy storage sub-circuit 201, controlling the first energy storage sub-circuit 201 and the second energy storage sub-circuit 202 to form a target loop, that is, controlling the energy storage circuit to be in a test operation mode.

[0093] When the first circuit breaker, the second circuit breaker and the first switch circuit K1 are turned on, and the second switch circuit K2 and the third switch circuit K3 are turned off, the current passes through the energy storage modules SM1, SM2 and SM3 in the first energy storage sub-circuit 201, and flows to the energy storage modules SM4, SM5 and SM6 in the second energy storage sub-circuit 202, controlling the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit, that is, controlling the energy storage circuit to be in a non-test operation mode.

[0094] In the technical solution of the embodiment of the present application, the energy storage circuit and the high-voltage bus are connected through a circuit breaker to facilitate the controller to switch the energy storage circuit to the test operation mode and the grid-connected operation mode by controlling the second switch circuit and / or the third switch circuit. There is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, which can reduce the installation and testing workload of the energy storage system.

[0095] According to some embodiments of the present application, as described above Figure 3 As shown, the energy storage circuit further includes a reactor 50, which is connected in series to the positive electrode of the first energy storage sub-circuit and / or the negative electrode of the second energy storage sub-circuit.

[0096] Similarly, the energy storage system may include only one reactor 50 or two reactors 50. When the energy storage system includes only one reactor 50, the reactor 50 may be disposed above the first energy storage subcircuit 201. In this case, the reactor 50 is connected in series between the positive electrode of the first energy storage subcircuit 201 and the positive electrode of the second energy storage subcircuit 201. The reactor 50 may also be disposed below the second energy storage subcircuit 202. In this case, the reactor 50 is connected in series between the negative electrode of the first energy storage subcircuit 201 and the negative electrode of the second energy storage subcircuit 202.

[0097] In the embodiment of the present application, the energy storage system includes two reactors 50, such as Figure 3 As shown, the reactor 50 includes a first reactor and a second reactor. Figure 3 The reactor located above the first energy storage sub-circuit 201 is used as the first reactor, and the reactor below the second energy storage sub-circuit 202 is used as the second reactor.

[0098] The first reactor is connected in series between the positive electrode of the first energy storage sub-circuit 202 and the positive electrode of the second energy storage sub-circuit 202 through the second switch circuit K2, and the second reactor is connected in series between the negative electrode of the first energy storage sub-circuit 201 and the negative electrode of the second energy storage sub-circuit 202 through the third switch circuit K3.

[0099] In the technical solution of the embodiment of the present application, the short-circuit current of the first energy storage sub-circuit and the second energy storage sub-circuit is limited by the inductor, the voltage distribution on the first energy storage sub-circuit and the second energy storage sub-circuit is improved, and the high-order harmonics are limited and the harmonic interference is reduced, so as to realize the regulation of the voltage and current on the first energy storage sub-circuit and the second energy storage sub-circuit.

[0100] According to some embodiments of the present application, the first energy storage sub-circuit includes a test circuit, which includes at least one energy storage module or at least one valve section in the first energy storage sub-circuit; the second energy storage sub-circuit includes a tested circuit, which includes at least one energy storage module or at least one valve section in the second energy storage sub-circuit.

[0101] The first energy storage subcircuit includes a test circuit, and the second energy storage subcircuit includes a test circuit. The controller controls the first circuit breaker, the second circuit breaker and the first switch circuit K1 to turn off, and controls the second switch circuit K2 and the third switch circuit K3 to turn on, and can control the energy storage module in the first energy storage subcircuit to be put into use as the energy storage module in the test circuit, and control the energy storage module in the second energy storage subcircuit to be put into the test circuit as the energy storage module in the test circuit. For example, the energy storage module SM1 can be put into use, the energy storage module SM2 and the energy storage module SM3 are bypassed, and the energy storage module SM1 is used as the energy storage module in the test circuit. The energy storage module SM4 and the energy storage module SM5 are put into use, the energy storage module SM6 is bypassed, and the energy storage module SM4 and the energy storage module SM5 are used as the energy storage modules in the test circuit.

[0102] In the embodiment of the present application, the accompanying test circuit and the tested circuit may include one energy storage module or multiple energy storage modules, that is, the accompanying test circuit and the tested circuit may be directly composed of one energy storage module or one valve section (multiple energy storage modules). It may also be composed of multiple valve sections, that is, each of the multiple valve sections includes one energy storage module, or each of the multiple valve sections includes multiple energy storage modules.

[0103] In the technical solution of the embodiment of the present application, since the accompanying test circuit includes at least one energy storage module or at least one valve section in the first energy storage sub-circuit, and the tested circuit includes at least one energy storage module or at least one valve section in the second energy storage sub-circuit, various forms of tests can be performed on the energy storage system, not only a single energy storage module but also a valve section can be tested, and the test equipment can use the control and protection, reactors, measuring equipment, water cooling and background equipment of actual engineering, without adding additional equipment, thereby reducing the test cost.

[0104] Figure 4 is a fourth structural diagram of the energy storage system provided in the embodiment of the present application, such as Figure 4 As shown, the energy storage system 100 further includes an energy replenishment circuit 60, which is connected to the controller 10 and the energy storage circuit 20. Figure 4 As shown, the energy storage system 100 also includes an energy replenishment circuit 60, which is connected to the controller 10 and the energy storage circuit 20. Specifically, the energy replenishment circuit 60 may include a plurality of energy replenishment units, each test module corresponds to an energy replenishment unit, and each energy replenishment unit is connected in parallel with a test module. For example, the energy replenishment unit is connected in parallel with a tested module. Alternatively, the energy replenishment circuit 60 may include one energy replenishment unit, and the one energy replenishment unit is connected in parallel with all the test modules.

[0105] Optionally, the energy compensation circuit 60 may be a circuit composed of a constant current source, an AC regulated power supply, a DC regulated power supply, an inverter regulated power supply, a switching regulated power supply, etc.

[0106] According to some embodiments of the present application, Figure 5 is a fifth structural diagram of the energy storage system provided in an embodiment of the present application, Figure 6 8 is a schematic diagram of the eighth structure of the energy storage system provided in the embodiment of the present application. Figure 5 and Figure 6 As shown, the energy compensation circuit 60 includes a power supply 601 and a fourth switch circuit K4, and the fourth switch circuit K4 is connected to the power supply 601 and the controller.

[0107] In an embodiment of the present application, the energy replenishment circuit includes a power supply 601 and a fourth switch circuit K4. According to the above embodiment, each energy replenishment unit may include a power supply 601 and a fourth switch circuit K4, so that the controller controls the fourth switch circuit K4 corresponding to the module that needs energy replenishment to be turned on, and uses the power supply 601 corresponding to the module that needs energy replenishment to charge the battery of the target module.

[0108] Optionally, the power supply 601 can be a constant current source, an AC regulated power supply, a DC regulated power supply, an inverter regulated power supply, a switching regulated power supply, etc.

[0109] In the technical solution of the embodiment of the present application, the energy replenishment circuit includes a power supply and a fourth switching circuit. The implementation method of the energy replenishment circuit is simple. The controller can control the power supply to charge the module that needs energy replenishment based on the fourth switching circuit, and the control method is easy to implement.

[0110] According to some embodiments of the present application, a control method for an energy storage system is provided, and the control method is applied to the energy storage system provided by any of the above embodiments; the control method may include:

[0111] The first switch circuit is controlled to be turned off, and the second switch circuit and the third switch circuit are controlled to be turned on, so as to control the first energy storage sub-circuit and the second energy storage sub-circuit to form a target loop; when the first energy storage sub-circuit and the second energy storage sub-circuit form the target loop, the working condition of the tested circuit in the energy storage circuit is tested; the tested circuit includes the first energy storage sub-circuit or the second energy storage sub-circuit.

[0112] According to some embodiments of the present application, when the first energy storage sub-circuit and the second energy storage sub-circuit form a target loop, the working condition of the circuit under test in the energy storage circuit is tested, including: obtaining actual current parameters of the target loop; and testing the working condition of the circuit under test based on the actual current parameters and preset test current parameters of the circuit under test.

[0113] Optionally, the preset test current parameter may be one or more parameters of a test current value, a test current duty cycle, a test current fluctuation frequency, etc. The preset test current parameter may be input through a screen, or may be set in a programming manner.

[0114] In an embodiment of the present application, a current transformer is disposed on a line of the energy storage system, and the current is detected in real time by electromagnetic induction, thereby obtaining actual current parameters of the energy storage circuit.

[0115] In the test operation mode, the energy storage unit in the energy storage module is used to provide direct current to the energy storage system.

[0116] In an embodiment of the present application, the controller obtains the actual current parameters of the target circuit, compares the actual current parameters with the preset test current parameters, and if the actual current parameters are consistent with the preset test current parameters, the working condition of the test circuit is tested; if the actual current parameters are inconsistent with the preset test current parameters, corresponding adjustment strategies can be adopted according to the difference in the preset test current parameters to make the actual current parameters consistent with the preset test current parameters to test the working condition of the test circuit.

[0117] In the technical solution of the embodiment of the present application, the actual current parameters are determined based on the actual current parameters and the preset test current parameters of the test circuit, thereby completing the test of the working condition of the test circuit, making the test of the working condition of the test circuit more accurate.

[0118] According to some embodiments of the present application, based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested, including: if the actual current value of the target loop is inconsistent with the test current value included in the preset test current, then adjusting the number of energy storage modules put into operation in the accompanying test circuit in the energy storage circuit, and / or adjusting the duration of the energy storage modules put into operation to adjust the duty cycle of the energy storage modules put into operation, and testing the working condition of the test circuit.

[0119] The duty cycle of the energy storage module = the time duration of the energy storage module being switched on / the time duration of one cycle. The time duration of one cycle is equal to the sum of the time duration of the energy storage module being switched on and the time duration of the energy storage module being switched off.

[0120] In an embodiment of the present application, a current transformer can be used to obtain the actual current value of the target circuit in real time, and the actual current value can be sent to a controller. The controller controls the number of energy storage modules put into operation in the test circuit according to the comparison between the actual current value and the test current value, and / or adjusts the operation time of the energy storage modules put into operation to adjust the duty cycle of the energy storage modules put into operation to test the working condition of the circuit under test.

[0121] Controlling the number of energy storage modules in the test circuit and / or adjusting the duration of the energy storage modules to adjust the duty cycle of the energy storage modules to test the working condition of the test circuit may include the following three implementation methods:

[0122] The first method: The controller controls the number of energy storage modules in the accompanying test circuit. For example, in the test operation mode, the energy storage module in the accompanying test circuit is SM1, and the actual current value is less than the test current value. The controller can control the energy storage module SM2 to be put into the target circuit to increase the actual current value of the target circuit.

[0123] The second method: The controller controls the input time of the energy storage module in the test circuit. For example, in the test operation mode, the energy storage module in the test circuit is SM1, and the actual current value is less than the test current value. The controller increases the input time of the energy storage module SM1 and increases the current duty cycle to increase the actual current value of the target circuit.

[0124] The third method is to combine the first method and the second method mentioned above, control the number of energy storage modules put into the test circuit while controlling the input time of the energy storage modules, thereby changing the actual current value in the target circuit, so that the actual current value is consistent with the test current value, so as to test the working condition of the test circuit.

[0125] In the technical solution of the embodiment of the present application, when the actual current value is inconsistent with the test current value, the duty cycle of the energy storage modules put into use is adjusted by adjusting the number of energy storage modules put into use in the test circuit and / or adjusting the time for which the energy storage modules are put into use, so as to test the working condition of the test circuit more accurately.

[0126] According to some embodiments of the present application, the method further includes:

[0127] If the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency included in the preset test current parameters, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the accompanying test circuit to test the working condition of the test circuit.

[0128] The switching frequency refers to the number of switching cycles within a period of time.

[0129] In an embodiment of the present application, the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency, and the switching frequency of the energy storage module in the test circuit is adjusted to test the working condition of the test circuit. For example, when the actual current fluctuation frequency of the target circuit is less than the test current fluctuation frequency, the controller reduces the switching frequency of the energy storage module in the test circuit to increase the actual current fluctuation frequency to the test current fluctuation frequency. When the actual current fluctuation frequency of the target circuit is greater than the test current fluctuation frequency, the controller increases the switching frequency of the energy storage module in the test circuit to reduce the actual current fluctuation frequency to the test current fluctuation frequency.

[0130] In the technical solution of the embodiment of the present application, when the actual current fluctuation frequency is inconsistent with the test current fluctuation frequency, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the test circuit to test the working condition of the test circuit, so that the working condition of the test circuit is tested more accurately.

[0131] According to some embodiments of the present application, the method further includes:

[0132] The switching of the energy storage module in the test circuit is controlled according to the test current duty cycle included in the preset test current parameters to test the working condition of the test circuit.

[0133] The test current duty cycle refers to the input time of the energy storage module / the length of one cycle. The length of one cycle is equal to the sum of the input time of the energy storage module and the cut-out time of the tested module. For example, in one cycle, the controller controls the input time of the energy storage module to be 70 seconds and the cut-out time to be 30 seconds. The test current duty cycle of the energy storage module is 0.7.

[0134] In an embodiment of the present application, when the actual current duty cycle of the target circuit is less than the test current duty cycle, the controller controls the switching of the energy storage module in the test circuit according to the test current duty cycle to test the working condition of the test circuit.

[0135] In the technical solution of the embodiment of the present application, the switching of the energy storage module in the test module is directly controlled according to the test current duty cycle to simulate the actual working condition, so as to test the working condition of the test circuit, so that the working condition of the test circuit is tested more accurately.

[0136] According to some embodiments of the present application, the control method of the energy storage system further includes:

[0137] The first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit.

[0138] In an embodiment of the present application, when the test of the test circuit is completed, the controller turns on the first switch circuit K1, controls the second switch circuit K2 and the third switch circuit K3 to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit, that is, controls the energy storage circuit to switch from the test operation mode to the actual operation working mode.

[0139] In the technical solution of the embodiment of the present application, the first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the test operation mode to the actual operation mode. The energy storage system can be put into the actual operation mode without disassembling the energy storage system multiple times, which solves the problem of large workload in installing and testing the energy storage system and reduces the time cost of testing the energy storage system. At the same time, since the energy storage system can be switched from the test operation mode to the actual operation mode, there is no need to disassemble and install the energy storage system between the test operation platform and the actual operation platform, and there is no need to prepare a set of supporting equipment for the test operation platform, thereby saving the test cost, wherein the supporting equipment includes, for example, control and protection, reactors, measuring equipment, water cooling and background equipment.

[0140] According to some embodiments of the present application, the energy storage system further includes an energy replenishment circuit, which is connected to the controller and the energy storage circuit; the method further includes:

[0141] Obtain the state of charge of the energy storage module; determine that the energy storage module corresponding to the state of charge less than the preset state of charge is the target module, and control the energy replenishment circuit to charge the target module.

[0142] The controller obtains the charge states of the energy storage modules in the accompanying test circuit and the energy storage modules in the tested circuit, compares the charge state of each energy storage module with a preset charge state, determines the energy storage module corresponding to a charge state that is less than the preset charge state as the target module, and controls the energy replenishment unit corresponding to the target module in the energy replenishment circuit to charge the battery of the target module.

[0143] In the technical solution of the embodiment of the present application, by acquiring the state of charge of the energy storage module and determining that the energy storage module corresponding to the state of charge less than the preset state of charge is the target module, the energy compensation circuit is controlled to charge the target module. In the embodiment of the present application, the energy compensation circuit is used to charge the energy storage module corresponding to the state of charge less than the preset state of charge, so that the state of charge of the energy storage module in the accompanying test circuit and the energy storage module in the tested circuit meet the preset state of charge, laying a foundation for the subsequent test of the working condition of the tested circuit in the energy storage circuit based on the test operation mode.

[0144] According to some embodiments of the present application, the energy replenishment circuit includes a power supply and a fourth switch circuit, and the fourth switch circuit is connected to the power supply and the controller; controlling the energy replenishment circuit to charge the target module includes:

[0145] The fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using the power supply.

[0146] In the embodiment of the present application, the energy replenishment circuit includes a power supply and a fourth switch circuit. According to the above embodiment, each energy replenishment unit may include a power supply and a fourth switch circuit. The controller controls the fourth switch circuit corresponding to the target module to be turned on, and uses the power supply corresponding to the target module to charge the battery of the target module. When all the energy storage modules in the accompanying test circuit and the tested circuit meet the preset state of charge requirements, the controller controls the energy storage circuit to be in a test operation mode based on the switch circuit, and tests the working condition of the tested circuit in the energy storage circuit in the test operation mode.

[0147] In the technical solution of the embodiment of the present application, the fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using the power supply. The energy replenishment circuit in the embodiment of the present application includes the power supply and the fourth switch circuit. The implementation method of the energy replenishment circuit is simple. The controller controls the power supply to charge the target module based on the fourth switch circuit, and the control method is easy to implement.

[0148] Figure 7 is a flow chart of a control method for an energy storage system provided in an embodiment of the present application, such as Figure 7 As shown, the following steps may be included: start the push test of the energy storage module in the energy storage system, switch the energy storage system to the push test circuit, determine the energy storage module to be tested from the energy storage system, bypass other energy storage modules in the energy storage system, and determine whether the state of charge (SOC) of the energy storage module to be tested meets the preset state of charge requirements. If the preset state of charge requirements are met, set the preset test current parameters according to the test requirements, that is, the test current value, the test current fluctuation frequency and the test current duty cycle. Start the push test, adjust the duty cycle of the accompanying test module, etc. so that the actual test current parameters on the target circuit are consistent with the preset test current parameters, control the energy storage circuit to be in the test operation mode based on the switch circuit, test the working condition of the tested circuit in the energy storage circuit, and after the energy storage module test operation is completed, control the energy storage circuit to be in the actual operation mode based on the switch circuit, and the push test of the energy storage module is completed.

[0149] Figure 8 is a flow chart of another control method of an energy storage system provided in an embodiment of the present application. Figure 8As shown, the following steps may be included: start the push test of the energy storage system, switch the energy storage system to the push test circuit, determine the valve section to be tested from the energy storage system, bypass other energy storage modules in the energy storage system, determine whether the charge state of the energy storage module in the valve section to be tested meets the preset charge state requirements, and set the preset test current parameters according to the test requirements, that is, the test current value, the test current fluctuation frequency and the test current duty cycle, in accordance with the test requirements. Start the push test, adjust the duty cycle of the accompanying test module in the valve section to be tested, etc. so that the actual test current parameters on the target circuit are consistent with the preset test current parameters, control the energy storage circuit to be in the test operation mode based on the switch circuit, test the working condition of the circuit under test in the energy storage circuit, and after the valve section test operation is completed, control the energy storage circuit to be in the actual operation mode based on the switch circuit, and the push test of the valve section is completed.

[0150] In the technical solution of the embodiment of the present application, the energy storage circuit is controlled to be in the test operation mode based on the switch circuit, and the working condition of the tested circuit in the energy storage circuit is tested in the test operation mode. The energy storage system in the present application includes a switch circuit, and the energy storage circuit can be placed in the test operation mode based on the switch circuit, so that the working condition of the tested circuit in the energy storage circuit is tested in the test operation mode. The energy storage circuit can be placed in the test operation mode based on the switch circuit, that is, before the energy storage circuit is placed in the test operation mode, the energy storage circuit can be placed in the actual operation mode or in other modes such as the non-powered mode. The energy storage circuit can be placed in the test operation mode based on the switch circuit. Therefore, there is no need to install and test the energy storage system between the test operation mode and the actual operation mode, which can reduce the installation and testing workload of the energy storage system.

[0151] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0152] Based on the same inventive concept, the embodiment of the present application also provides a control device for an energy storage system for implementing the control method of the energy storage system involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more camera calibration device embodiments provided below can refer to the limitations of the control method of the energy storage system above, and will not be repeated here.

[0153] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Fig. 9 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store relevant data of the energy storage system. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a control method of an energy storage system is implemented.

[0154] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0155] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0156] Controlling the first switch circuit to be turned off, and controlling the second switch circuit and the third switch circuit to be turned on, so as to control the first energy storage sub-circuit and the second energy storage sub-circuit to form a target loop;

[0157] When the first energy storage subcircuit and the second energy storage subcircuit form a target loop, the working condition of the tested circuit in the energy storage circuit is tested; the tested circuit includes the first energy storage subcircuit or the second energy storage subcircuit.

[0158] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0159] Get the actual current parameters of the target circuit;

[0160] Based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested.

[0161] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0162] If the actual current value of the target circuit is inconsistent with the test current value included in the preset test current parameters, the number of energy storage modules in the accompanying test circuit in the energy storage circuit is adjusted, and / or the duration of the energy storage modules put into operation is adjusted to adjust the duty cycle of the energy storage modules put into operation and test the working condition of the circuit under test.

[0163] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0164] If the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency included in the preset test current parameters, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the accompanying test circuit to test the working condition of the test circuit.

[0165] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0166] The switching of the energy storage module in the test circuit is controlled according to the test current duty cycle included in the preset test current parameters to test the working condition of the test circuit.

[0167] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0168] The first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit.

[0169] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0170] Obtain the charge state of the energy storage module;

[0171] An energy storage module corresponding to a state of charge less than a preset state of charge is determined as a target module, and an energy replenishment circuit is controlled to charge the target module.

[0172] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0173] Controlling the energy replenishment circuit to charge the target module includes:

[0174] The fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using the power supply.

[0175] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0176] Controlling the first switch circuit to be turned off, and controlling the second switch circuit and the third switch circuit to be turned on, so as to control the first energy storage sub-circuit and the second energy storage sub-circuit to form a target loop;

[0177] When the first energy storage subcircuit and the second energy storage subcircuit form a target loop, the working condition of the tested circuit in the energy storage circuit is tested; the tested circuit includes the first energy storage subcircuit or the second energy storage subcircuit.

[0178] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0179] Get the actual current parameters of the target circuit;

[0180] Based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested.

[0181] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0182] Based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested, including:

[0183] If the actual current value of the target circuit is inconsistent with the test current value included in the preset test current parameter, the number of energy storage modules in the energy storage circuit and the accompanying test circuit is adjusted, and / or the duration of the energy storage modules in operation is adjusted to adjust the duty cycle of the energy storage modules in operation to test the working condition of the circuit under test;

[0184] The target circuit is a circuit formed by the accompanying test circuit and the tested circuit.

[0185] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0186] If the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency included in the preset test current parameters, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the accompanying test circuit to test the working condition of the test circuit.

[0187] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0188] The switching of the energy storage module in the test circuit is controlled according to the test current duty cycle included in the preset test current parameters to test the working condition of the test circuit.

[0189] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0190] The first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit.

[0191] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0192] Obtain the charge state of the energy storage module;

[0193] An energy storage module corresponding to a state of charge less than a preset state of charge is determined as a target module, and an energy replenishment circuit is controlled to charge the target module.

[0194] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0195] Controlling the energy replenishment circuit to charge the target module includes:

[0196] The fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using the power supply.

[0197] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0198] Controlling the first switch circuit to be turned off, and controlling the second switch circuit and the third switch circuit to be turned on, so as to control the first energy storage sub-circuit and the second energy storage sub-circuit to form a target loop;

[0199] In the case where the first energy storage subcircuit and the second energy storage subcircuit form a target loop, the working condition of the tested circuit in the energy storage circuit is tested; the tested circuit includes the first energy storage subcircuit or the second energy storage subcircuit. In one embodiment, when the computer program is executed by the processor, the following steps are also implemented:

[0200] Get the actual current parameters of the target circuit;

[0201] Based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested.

[0202] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0203] Based on the actual current parameters and the preset test current parameters of the test circuit, the working condition of the test circuit is tested, including:

[0204] If the actual current value of the target circuit is inconsistent with the test current value included in the preset test current parameter, the number of energy storage modules in the energy storage circuit and the accompanying test circuit is adjusted, and / or the duration of the energy storage modules in operation is adjusted to adjust the duty cycle of the energy storage modules in operation to test the working condition of the circuit under test;

[0205] The target circuit is a circuit formed by the accompanying test circuit and the tested circuit.

[0206] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0207] If the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency included in the preset test current parameters, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the energy storage circuit to test the working condition of the circuit under test.

[0208] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0209] The switching of the energy storage module in the test circuit is controlled according to the test current duty cycle included in the preset test current parameters to test the working condition of the test circuit.

[0210] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0211] The first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of the series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit.

[0212] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0213] Obtain the charge state of the energy storage module;

[0214] An energy storage module corresponding to a state of charge less than a preset state of charge is determined as a target module, and an energy replenishment circuit is controlled to charge the target module.

[0215] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0216] Controlling the energy replenishment circuit to charge the target module includes:

[0217] The fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using the power supply.

[0218] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0219] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in the present application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on regional blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0220] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0221] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises a controller, an energy storage circuit, and a switch device, wherein the controller is connected to the energy storage circuit and the switch device, and the switch device comprises a first switch circuit, a second switch circuit, and a third switch circuit; The energy storage circuit comprises a first energy storage subcircuit and a second energy storage subcircuit connected in series, the first energy storage subcircuit and the second energy storage subcircuit respectively comprise energy storage devices, the energy storage devices comprise an energy storage module or at least two energy storage modules connected in series, the energy storage module comprises a power unit and an energy storage unit connected in parallel with the power unit; The two ends of the first switch circuit are respectively connected to the negative electrode of the first energy storage sub-circuit and the positive electrode of the second energy storage sub-circuit, the two ends of the second switch circuit are respectively connected to the positive electrode of the first energy storage sub-circuit and the positive electrode of the second energy storage sub-circuit, and the two ends of the third switch circuit are respectively connected to the negative electrode of the first energy storage sub-circuit and the negative electrode of the second energy storage sub-circuit.

2. The energy storage system according to claim 1, characterized in that: The energy storage circuit also includes a circuit breaker, a first end of the circuit breaker is connected between the second switch circuit and the positive electrode of the first energy storage sub-circuit, and a second end of the circuit breaker is connected to a high-voltage positive bus, and / or, a first end of the circuit breaker is connected between the third switch circuit and the negative electrode of the second energy storage sub-circuit, and a second end of the circuit breaker is connected to a high-voltage negative bus.

3. The energy storage system according to claim 1, characterized in that: The energy storage circuit further includes a reactor, which is connected in series to the positive electrode of the first energy storage sub-circuit and / or the negative electrode of the second energy storage sub-circuit.

4. The energy storage system according to any one of claims 1 to 3, characterized in that: The first energy storage subcircuit includes a companion test circuit, and the companion test circuit includes at least one energy storage module or at least one valve section in the first energy storage subcircuit; The second energy storage subcircuit includes a tested circuit, and the tested circuit includes at least one energy storage module or at least one valve section in the second energy storage subcircuit.

5. The energy storage system according to any one of claims 1 to 3, characterized in that: The energy storage system further includes an energy compensation circuit, which is connected to the controller and the energy storage circuit.

6. The energy storage system according to claim 5, characterized in that: The energy compensation circuit includes a power supply and a fourth switch circuit, and the fourth switch circuit is connected to the power supply and the controller.

7. A control method for an energy storage system, characterized in that: The control method is applied to the energy storage system according to any one of claims 1 to 6; the control method comprises: Controlling the first switch circuit to be turned off, and controlling the second switch circuit and the third switch circuit to be turned on, so as to control the first energy storage sub-circuit and the second energy storage sub-circuit to form a target loop; When the first energy storage subcircuit and the second energy storage subcircuit form a target loop, the working condition of a circuit under test in the energy storage circuit is tested; the circuit under test includes the first energy storage subcircuit or the second energy storage subcircuit.

8. The method according to claim 7, characterized in that The step of testing the working condition of the circuit under test in the energy storage circuit when the first energy storage sub-circuit and the second energy storage sub-circuit form a target loop includes: Obtaining actual current parameters of the target loop; Based on the actual current parameter and the preset test current parameter of the test circuit, the working condition of the test circuit is tested.

9. The method according to claim 8, characterized in that The step of testing the working condition of the circuit under test based on the actual current parameter and the preset test current parameter of the circuit under test includes: If the actual current value of the target circuit is inconsistent with the test current value included in the preset test current parameters, the number of energy storage modules in the accompanying test circuit in the energy storage circuit is adjusted, and / or the duration of the energy storage modules being put into operation is adjusted to adjust the duty cycle of the energy storage modules being put into operation, so as to test the working condition of the circuit under test.

10. The method according to claim 9, characterized in that The method further comprises: If the actual current fluctuation frequency of the target circuit is inconsistent with the test current fluctuation frequency included in the preset test current parameters, the number of switching cycles within the preset time period is adjusted to adjust the switching frequency of the energy storage module in the accompanying test circuit to test the working condition of the test circuit.

11. The method according to claim 9 or 10, characterized in that: The method further comprises: The switching of the energy storage module in the test circuit is controlled according to the test current duty cycle included in the preset test current parameters to test the working condition of the test circuit.

12. The method according to claim 11, characterized in that The method further comprises: The first switch circuit is controlled to be turned on, and the second switch circuit and the third switch circuit are controlled to be turned off, so as to control the energy storage circuit to switch from the state of the target loop to the state of a series circuit formed by the first energy storage sub-circuit and the second energy storage sub-circuit.

13. The method according to claim 9 or 10, characterized in that: The method further comprises: Obtain the charge state of the energy storage module; An energy storage module corresponding to a state of charge less than a preset state of charge is determined as a target module, and an energy replenishment circuit is controlled to charge the target module.

14. The method according to claim 13, characterized in that The controlling the energy replenishing circuit to charge the target module includes: The fourth switch circuit is controlled to be turned on, and when the fourth switch circuit is turned on, the target module is charged by using a power supply.

15. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 7 to 14 are implemented.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 14 are implemented.

17. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 14 are implemented.

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