Energy storage system and control method

Abstract

The invention discloses an energy storage system and a control method. The energy storage system comprises an integrated circuit board, a control mainboard and a battery cell module, the integrated circuit board comprises a battery management circuit, an MPPT circuit and an inverter circuit, and the MPPT circuit and the inverter circuit are connected with the battery cell module through the battery management circuit; the control mainboard is connected with the battery cell module through the battery management circuit; the integrated circuit board is configured to be powered on under the condition that the power-on request is received, and power is supplied to the control mainboard after the integrated circuit board is powered on. According to the energy storage system, the battery management circuit, the MPPT circuit and the inverter circuit are integrated into a whole to form the integrated circuit board, when the power-on request is received, the integrated circuit board can be awakened, and then the integrated circuit board supplies power to the control mainboard, so that the whole energy storage system is powered on, the power-on logic of the energy storage system is relatively simple, and the power-on reliability of the energy storage system is improved. The power-on time of the energy storage system is shortened, and the power-on efficiency of the energy storage system is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage system and a control method. Background Art

[0002] At present, some portable energy storage products usually include BMS, mainboard, inverter circuit, PV, MPPT and other modules. When the whole system is powered on, an external button usually wakes up the BMS, then wakes up the mainboard, and then the mainboard wakes up other modules to complete the power-on of the whole system; when charging wakes up, the inverter circuit wakes up and supplies power to the mainboard, and the mainboard then wakes up the BMS, and the BMS controls the charging MOS to close, and the whole machine is powered on; such power-on logic is complex, and the charging wake-up power-on time is relatively long. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application needs to provide an energy storage system and a control method.

[0004] The energy storage system of the embodiment of the present application includes an integrated circuit board, a control main board and a battery module, wherein the integrated circuit board includes a battery management circuit, an MPPT circuit and an inverter circuit.

[0005] The MPPT circuit and the inverter circuit are connected to the battery module through the battery management circuit;

[0006] The control mainboard is connected to the battery module through the battery management circuit;

[0007] The integrated circuit board is configured to be powered on upon receiving a power-on request, and to supply power to the control main board after the integrated circuit board is powered on.

[0008] In certain embodiments, the battery management circuit includes an analog front-end unit, a signal processing unit, an output control unit, and a power supply unit. The analog front-end unit is connected to the output control unit and the signal processing unit. The power supply unit supplies power to the signal processing unit. The signal processing unit is connected to the output control unit. The battery cell module is electrically connected to the battery cell module, the control main board, the MPPT circuit, and the inverter circuit through the output control unit.

[0009] In some embodiments, the power supply unit is a first power supply unit,

[0010] The analog front end unit is configured to power on when receiving a power-on request, and output an enable control signal to the first power supply unit to control the first power supply unit to supply power to the signal processing unit, so that the signal processing unit is powered on;

[0011] The signal processing unit is configured to control the output control unit to be turned on for a preset time after power-on, so that the battery module pre-charges the MPPT circuit, the inverter circuit and / or the control mainboard;

[0012] The analog front end unit is also configured to control the output control unit to be turned on after the pre-charging is completed, so that the battery cell module powers on the MPPT circuit, the inverter circuit and / or the control main board.

[0013] In some embodiments, the power supply unit is a second power supply unit,

[0014] The inverter circuit is configured to power on when receiving a power-on request, and output electric energy to the second power supply unit, so that the second power supply unit supplies power to the signal processing unit, so that the signal processing unit is powered on;

[0015] The signal processing unit is configured to control the output control unit to be turned on for a preset time and then turned off, so that the battery module pre-charges the MPPT circuit, the inverter circuit and / or the control mainboard;

[0016] The analog front-end unit is configured to control the output control unit to be turned on after the pre-charging is completed, so that the battery cell module powers on the MPPT circuit, the inverter circuit and / or the control main board.

[0017] In some embodiments, the power supply unit is a second power supply unit;

[0018] The MPPT circuit is configured to power on when receiving a power-on request, and output electric energy to the second power supply unit so that the second power supply unit supplies power to the signal processing unit, so that the signal processing unit is powered on;

[0019] The signal processing unit is configured to control the output control unit to be turned on for a preset time and then turned off, so that the battery module pre-charges the MPPT circuit, the inverter circuit and / or the control mainboard;

[0020] The analog front-end unit is configured to control the output control unit to be turned on after the pre-charging is completed, so that the battery cell module powers on the MPPT circuit, the inverter circuit and / or the control main board.

[0021] In some embodiments, the control mainboard is further in communication with the signal processing unit, and the control mainboard is further configured to send a power-off instruction to the signal processing unit and power off the unit when a power-off request is detected;

[0022] The signal processing unit is further configured to send the power-off instruction to the analog front end unit, and control the MPPT circuit and the inverter circuit to power off according to the power-off instruction;

[0023] The analog front end unit is further configured to power off after receiving the power off instruction.

[0024] In some embodiments, the output control unit comprises:

[0025] A pre-charging resistor, one end of which is connected to the positive electrode of the battery module;

[0026] A pre-charging transistor, wherein the first electrode is connected to the other end of the pre-charging resistor, the second electrode is connected to the control mainboard, the MPPT circuit and the inverter circuit, and the control electrode is connected to the signal processing unit;

[0027] A first driving transistor, a first electrode of which is connected to the positive electrode of the battery module, and a control electrode of which is connected to the analog front-end unit;

[0028] A second driving transistor, wherein the first electrode is connected to the second electrode of the first driving transistor, the second electrode is connected to the control mainboard, the MPPT circuit and the inverter circuit, and the control electrode is connected to the analog front end unit.

[0029] In some embodiments, the analog front end unit is further configured to detect the voltage and temperature of the battery cell module, and control the first driving transistor and the second driving transistor to turn off when the voltage and / or the temperature are abnormal.

[0030] In some embodiments, the control mainboard includes a mainboard power supply unit, a communication interface and a controller, and the control mainboard power supply unit is connected to the control output unit and the negative pole of the battery module; the communication interface is connected to the signal processing unit, and the controller is connected to the input end of the analog front-end unit.

[0031] The control method of the embodiment of the present application is used for the energy storage system, and the control method includes:

[0032] Responding to a power-on request to control the integrated circuit board to power on;

[0033] When the integrated circuit board is powered on, the integrated circuit board is controlled to supply power to the control main board so that the control main board is powered on.

[0034] In some embodiments, the control method further comprises:

[0035] Detecting a power-off request by the control mainboard;

[0036] When the power-off request is detected, a power-off instruction is sent to the integrated circuit board to control the integrated circuit board to power off.

[0037] In the energy storage system and control method of the implementation mode of the present application, by integrating the battery management circuit, the MPPT circuit and the inverter circuit into an integrated circuit board, and connecting the control main board to the battery management circuit of the integrated circuit board, when a power-on request is received, the integrated circuit board can be awakened first to power on the integrated circuit board, and then the integrated circuit board supplies power to the control main board, thereby completing the power-on of the entire energy storage system. In this way, the power-on logic of the energy storage system is relatively simple, the power-on time of the energy storage system is shortened, and the power-on efficiency of the energy storage system is improved.

[0038] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 It is a module schematic diagram of the energy storage system of the implementation mode of the present application.

[0041] Figure 2 It is a circuit diagram of an energy storage system according to an embodiment of the present application.

[0042] Description of main component symbols:

[0043] Energy storage system 100, integrated circuit board 10, battery management circuit 12, analog front end unit 121, signal processing unit 122, first power supply unit 123, second power supply unit 124, drive switch unit 125, first drive transistor MI, second drive transistor M2, pre-charge switch unit 126, pre-charge resistor R1, pre-charge transistor M3, MPPT circuit 14, inverter circuit 16, control main board 20, main board power supply unit 21, communication interface 22, controller 23, battery cell module 30. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0045] Please combine Figure 1, the embodiment of the present application provides an energy storage system 100. The energy storage system 100 includes an integrated circuit board 10, a control main board 20 and a battery module 30. The integrated circuit board 10 includes a battery management circuit 12, an MPPT circuit 14 and an inverter circuit 16. The MPPT circuit 14 and the inverter circuit 16 are connected to the battery module 30 through the battery management circuit 12; the control main board 20 is connected to the battery module 30 through the battery management circuit 12. The integrated circuit board 10 is configured to power on when a power-on request is received, and to supply power to the control main board 20 after the integrated circuit board 10 is powered on.

[0046] In the energy storage system 100 and control method of the embodiment of the present application, the battery management circuit 12, the MPPT circuit 14 and the inverter circuit 16 are integrated on an integrated circuit board 10, and the MPPT circuit 14 and the inverter circuit 16 are connected to the battery module 30 through the battery management circuit 12, and the control main board 20 is connected to the battery module 30 through the battery management circuit 12. When a power-on request is received, the integrated circuit board 10 can be awakened, and then the integrated circuit board 10 supplies power to the control main board 20, so that the entire energy storage system 100 is powered on. In this way, the power-on logic of the energy storage system 100 is relatively simple, the power-on time of the energy storage system 100 is shortened, and the power-on efficiency of the energy storage system 100 is improved.

[0047] See also Figure 1 and Figure 2 Specifically, the energy storage system 100 may be a portable energy storage system 100, for example, the energy storage system 100 may be a portable photovoltaic energy storage system. It can be understood that the photovoltaic energy storage system 100 can convert light energy into electrical energy and store it, and supply the electrical energy to the load. That is, the photovoltaic energy storage system 100 takes into account the functions of photoelectric conversion, electrical energy storage, and discharge.

[0048] The energy storage system 100 can be divided into a battery module 30, a battery management circuit 12 (Battery Management System, BMS), an MPPT circuit 14 (Maximum Power Point Tracking), an inverter circuit 16 and a control main board 20 according to its functions. Among them, the battery management circuit 12, the MPPT circuit 14 and the inverter circuit 16 are integrated into an integrated circuit board 10, and the battery management circuit 12 can be electrically connected to the battery module 30, the MPPT circuit 14, the inverter circuit 16 and the control main board 20 respectively. The battery module 30 is used to store electric energy. The battery management circuit 12 is used to manage the charging and discharging of the battery module 30. The inverter circuit 16 is used to convert the DC power of the battery module 30 into AC power when the energy storage system 100 supplies power to external devices, or to convert the AC power input from the outside into DC power to input into the battery module 30 during charging. The MPPT circuit 14 is a key part of the photovoltaic inverter system to maximize the use of solar energy. The MPPT circuit 14 is used to find and maintain the MPP of the photovoltaic cell to maximize energy output. The MPPT circuit 14 can use a non-isolated DC / DC circuit. Common topologies include Buck, Boost, and Buck-Boost circuits. The control motherboard 20 is the main control of the energy storage system 100, such as the CPU, memory, storage devices, and input and output devices, and provides communication and data transmission between them. The control motherboard 20 is used to monitor, control, and manage the operation of the entire energy storage system 100 to ensure the stability and efficiency of the energy storage system 100.

[0049] See also Figure 2 The battery management circuit 12 includes an analog front end unit 121 (Analog Front End, AFE), a signal processing unit 122 (Digital Signal Processing, DSP), an output control unit, a first power supply unit 123 and a second power supply unit 124. The analog front end unit 121 can be connected to the first power supply unit 123, the drive switch unit 125 and the signal processing unit 122 respectively. The signal processing unit 122 can be a DSP chip. The signal processing unit 122 can be electrically connected to the first power supply unit 123 and the second power supply unit 124, the pre-charge switch unit 126, the MPPT circuit 14 and the AC / DC module of the energy storage inverter circuit 16. The signal processing unit 122 can also be connected to the analog front end unit 121 and the control main board 20 for communication. The first power supply unit 123 can be connected to the positive pole of the battery module 30.

[0050] Further, the output control unit includes a driving switch unit 125 and a pre-charge switch unit 126. The driving switch unit 125 includes a first driving transistor MI and a second driving transistor M2, both of which can be MOS tubes, and the first driving transistor MI can be a charging control transistor, and the second driving transistor M2 can be a discharging control transistor, the first electrode of the first driving transistor MI is connected to the positive electrode of the battery module 30, and the control electrode of the first driving transistor MI is connected to the analog front-end unit 121; the first electrode of the second driving transistor M2 is connected to the second electrode of the first driving transistor MI, the second electrode of the second driving transistor M2 is connected to the control mainboard 20, the MPPT circuit 14 and the inverter circuit 16, and the control electrode of the second driving transistor M2 is connected to the analog front-end unit 121.

[0051] The pre-charging switch unit 126 may include a pre-charging resistor R1 and a pre-charging transistor M3, wherein one end of the pre-charging resistor R1 is connected to the positive electrode of the battery cell module 30, and the other end is connected to the first electrode of the pre-charging transistor M3, and the second electrode of the pre-charging transistor M3 is connected to the MPPT circuit 14, the AC / DC module of the inverter circuit 16 and the control motherboard 20.

[0052] The control mainboard 20 includes a mainboard power supply unit 21, a communication interface 22 and a controller 23. The mainboard power supply unit 21 is connected to the negative pole of the control output unit and the battery module 30, the communication interface 22 is connected to the signal processing unit 122, and the controller 23 is connected to the input end of the analog front-end unit 121.

[0053] The power-on request may include a power-on request input by a key switch, a power-on request input externally by the MPPT circuit 14, and a power-on request input externally by the inverter circuit 16. The power-on request input by the key switch may be received by the analog front end unit 121, the power-on request input externally by the MPPT circuit 14 may be received by the MPPT circuit 14, and the power-on request input externally by the inverter circuit 16 may be received by the AC / DC module of the inverter circuit 16. It can be understood that the power-on request input externally by the MPPT circuit 14 and the power-on request input externally by the inverter circuit 16 are charging wake-up requests.

[0054] When the integrated circuit board 10 receives any power-on request, the integrated circuit board 10 can be powered on, and when the integrated circuit board 10 is powered on, the control main board 20 is powered by the battery management circuit 12, so that the control main board 20 is powered on. In this way, the power-on of the entire energy storage system 100 is completed, and compared with the power-on logic of the related art, the power-on logic has the characteristics of simple power-on logic and short power-on time.

[0055] In certain embodiments, the analog front end unit 121 is configured to power on upon receiving a power-on request, and output an enable control signal to the first power supply unit 123 to control the first power supply unit 123 to drive the signal processing unit 122 to power on; the signal processing unit 122 is configured to control the output control unit to turn on and off after a preset time after power-on, so that the battery cell module 30 pre-charges the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20; the analog front end unit 121 is also configured to control the output control unit to turn on after the pre-charging is completed, so that the battery cell module 30 powers on the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20.

[0056] In this embodiment, the input end of the analog front end unit 121 is connected to an external push button switch for receiving a push button switch input. When a power-on request is received from the push button switch input, the analog front end unit 121 is powered on and awakened. The analog front end unit 121 provides an enable control signal to the first power supply unit 123. Driven by the enable control signal, the first power supply unit 123 provides electrical energy to the signal processing unit 122, so that the signal processing unit 122 is powered on and awakened. After the signal processing unit 122 is powered on, the signal processing unit 122 can drive the control pre-charge transistor M3 to be turned on, and the battery module 30 is turned on with the MPPT circuit 14, the AC / DC module of the inverter circuit 16, and the mainboard power supply unit 21 of the control mainboard 20 through the pre-charge switch unit 126, so as to realize pre-charging of the AC / DC module and / or the mainboard power supply unit 21 of the control mainboard 20. After the pre-charging is completed, the signal processing unit 122 can turn off the control pre-charge transistor M3 and send a pre-charging completion signal to the analog front-end unit 121, so that the analog front-end unit 121 controls the first drive transistor MI and the second drive transistor M2 to be closed, that is, the battery module 30 is connected to the MPPT circuit 14, the inverter circuit 16, and the control mainboard 20 through the drive switch unit 125. Thus, the MPPT circuit 14, the inverter circuit 16, and / or the control mainboard 20 are powered on, so that the integrated circuit board 10 and the control mainboard 20 are powered on.

[0057] In certain embodiments, the inverter circuit 16 is configured to power on upon receiving a power-on request, and to output electrical energy to the second power supply unit 124, so that the second power supply unit 124 drives the signal processing unit 122 to power on; the signal processing unit 122 is configured to control the output control unit to turn on and then turn off after a preset time, so that the battery cell module 30 pre-charges the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20; the analog front-end unit 121 is configured to control the output control unit to turn on after the pre-charging is completed, so that the battery cell module 30 powers on the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20.

[0058] In this embodiment, after the AC / DC module of the inverter circuit 16 receives the AC input, that is, receives the power-on request, the AC / DC module starts to power on and outputs power to the second power supply unit 124, so that the second power supply unit 124 can supply power to the signal processing unit 122. When the signal processing unit 122 is powered on, the signal processing unit 122 drives the pre-charge transistor M3 to turn on, and the battery cell module 30 is turned on with the MPPT circuit 14, the AC / DC module of the inverter circuit 16, and the mainboard power supply unit 21 of the control mainboard 20 through the pre-charge switch unit 126, so that the battery cell module 30 pre-charges the AC / DC module of the inverter circuit 16, the MPPT circuit 14 and / or the mainboard power supply unit 21 of the control mainboard 20. At the same time, the signal processing unit 122 can provide a wake-up signal to the front-end analog signal to power on the front-end analog signal. After the pre-charging is completed, the signal processing unit 122 drives the pre-charging transistor M3 to turn off, and the analog front-end unit 121 drives the first driving transistor MI and the second driving transistor M2 to close, that is, the battery module 30 connects the MPPT circuit 14, the inverter circuit 16 and the control main board 20 through the driving switch unit 125, so that the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20 are powered on, thus realizing the power-on of the integrated circuit board 10 and the control main board 20. In this way, the charging wake-up of the energy storage system 100 is realized.

[0059] In some embodiments, the MPPT circuit 14 is configured to power on upon receiving a power-on request, and output electrical energy to the second power supply unit 124, so that the second power supply unit 124 drives the signal processing unit 122 to power on; the signal processing unit 122 is configured to control the output control unit to turn on and then turn off after a preset time, so that the battery cell module 30 pre-charges the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20; the analog front-end unit 121 is configured to control the output control unit to turn on after the pre-charging is completed, so that the battery cell module 30 powers on the MPPT circuit 14, the MPPT circuit 14 and / or the control main board 20.

[0060] In this embodiment, after the MPPT circuit 14 receives the PV input, that is, receives the power-on request, the MPPT circuit 14 starts to power on and outputs power to the second power supply unit 124, so that the second power supply unit 124 can supply power to the signal processing unit 122. When the signal processing unit 122 is powered on, the signal processing unit 122 drives the pre-charge transistor M3 to turn on, and the battery cell module 30 is turned on with the MPPT circuit 14, the AC / DC module of the inverter circuit 16, and the mainboard power supply unit 21 of the control mainboard 20 through the pre-charge switch unit 126, so that the battery cell module 30 pre-charges the AC / DC module of the inverter circuit 16, the MPPT circuit 14 and / or the mainboard power supply unit 21 of the control mainboard 20. At the same time, the signal processing unit 122 can provide a wake-up signal to the front-end analog signal to power on the front-end analog signal. After the pre-charging is completed, the signal processing unit 122 drives the pre-charging transistor M3 to turn off, and the analog front-end unit 121 drives the first driving transistor MI and the second driving transistor M2 to close, that is, the battery module 30 connects the MPPT circuit 14, the inverter circuit 16 and the control main board 20 through the driving switch unit 125, so that the MPPT circuit 14, the inverter circuit 16 and / or the control main board 20 are powered on, thus realizing the power-on of the integrated circuit board 10 and the control main board 20. In this way, the photovoltaic charging wake-up of the energy storage system 100 is realized.

[0061] In some embodiments, the control main board 20 also communicates with the signal processing unit 122, and the control main board 20 is also configured to send a power-off instruction to the signal processing unit 122 and power off when a power-off request is detected; the signal processing unit 122 is also configured to send the power-off instruction to the analog front-end unit 121, and control the MPPT circuit 14 and the inverter circuit 16 to power off according to the power-off instruction; the analog front-end unit 121 is also configured to power off after receiving the power-off instruction.

[0062] Specifically, the controller 23 of the control main board 20 can be electrically connected to an external switch button. When the controller 23 detects a power-off request, the energy storage system 100 enters the power-off logic. The control main board 20 informs the signal processing unit 122 to power off through the communication interface 22. The signal processing unit 122 communicates with the analog front-end unit 121 and sends the power-off instruction to the analog front-end unit 121, so that the analog front-end unit 121 is powered off and sleeps. The first drive transistor MI and the second drive transistor M2 are disconnected. At the same time, the signal processing unit 122 controls the MPPT circuit 14 and the AC / DC module of the inverter circuit 16 to power off. In this way, the power-off of the entire energy storage system 100 is achieved.

[0063] See also Figure 2In some embodiments, the analog front end unit 121 is also configured to detect the voltage and temperature of the battery cell module 30, and control the first driving transistor MI and / or the second driving transistor M2 to turn off when the voltage and / or temperature are abnormal.

[0064] Specifically, the analog front-end unit 121 may have a built-in acquisition unit, which can monitor the key parameters of the battery module 30 such as voltage, current and temperature in real time, and the acquired data is processed by a specific algorithm to calculate important information such as the battery state of charge (SOC) and health state (SOH). In addition, when an abnormality is detected in the state of the battery module 30, such as overcharge, overdischarge or overheating, the first drive transistor MI and / or the second drive transistor M2 are controlled to be turned off, thereby protecting the battery module 30 from damage.

[0065] In this way, the voltage and temperature of the battery module 30 are detected through the analog front-end unit 121 to monitor the charging and discharging status of the battery, thereby preventing the occurrence of abnormal situations such as overcharging, overdischarging, and overheating.

[0066] The embodiment of the present application further provides a control method of an energy storage system, which is used for the above energy storage system. The control method includes:

[0067] 01, responding to a power-on request to control the integrated circuit board to power on;

[0068] 02. When the integrated circuit board is powered on, the control integrated circuit board supplies power to the control main board so that the control main board is powered on.

[0069] In the control method of the implementation mode of the present application, the integrated circuit board is controlled when a power-on request is received, and then the integrated circuit board supplies power to the control main board, thereby completing the power-on of the entire energy storage system. In this way, the power-on logic of the energy storage system is relatively simple, the power-on time of the energy storage system is shortened, and the power-on efficiency of the energy storage system is improved.

[0070] In some embodiments, the control method further comprises:

[0071] 03, detect the power-off request by controlling the main board;

[0072] 04. When a power-off request is detected, a power-off instruction is sent to the integrated circuit board to control the integrated circuit board to power off.

[0073] In this way, the energy storage system can be quickly powered off.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An energy storage system, characterized in that: It includes an integrated circuit board, a control main board and a battery module. The integrated circuit board includes a battery management circuit, an MPPT circuit and an inverter circuit. The MPPT circuit and the inverter circuit are connected to the battery module through the battery management circuit; The control mainboard is connected to the battery module through the battery management circuit; The integrated circuit board is configured to be powered on upon receiving a power-on request, and to supply power to the control main board after the integrated circuit board is powered on.

2. The energy storage system according to claim 1, characterized in that: The battery management circuit includes an analog front-end unit, a signal processing unit, an output control unit and a power supply unit. The analog front-end unit is connected to the output control unit and the signal processing unit. The power supply unit supplies power to the signal processing unit. The signal processing unit is connected to the output control unit. The battery cell module is electrically connected to the battery cell module, the control main board, the MPPT circuit and the inverter circuit through the output control unit.

3. The energy storage system according to claim 2, characterized in that: The power supply unit is a first power supply unit, The analog front end unit is configured to power on when receiving a power-on request, and output an enable control signal to the first power supply unit to control the first power supply unit to supply power to the signal processing unit, so that the signal processing unit is powered on; The signal processing unit is configured to control the output control unit to be turned on for a preset time after power-on, so that the battery module pre-charges the MPPT circuit, the inverter circuit and / or the control mainboard; The analog front end unit is also configured to control the output control unit to be turned on after the pre-charging is completed, so that the battery cell module powers on the MPPT circuit, the inverter circuit and / or the control main board.

4. The energy storage system according to claim 2, characterized in that: The power supply unit is a second power supply unit, The inverter circuit is configured to power on when receiving a power-on request, and output electric energy to the second power supply unit, so that the second power supply unit supplies power to the signal processing unit, so that the signal processing unit is powered on; The signal processing unit is configured to control the output control unit to be turned on for a preset time and then turned off, so that the battery module pre-charges the MPPT circuit, the inverter circuit and / or the control mainboard; The analog front-end unit is configured to control the output control unit to be turned on after the pre-charging is completed, so that the battery cell module powers on the MPPT circuit, the inverter circuit and / or the control main board.

5. The energy storage system according to claim 2, characterized in that: The power supply unit is a second power supply unit; The MPPT circuit is configured to power on when receiving a power-on request, and output electric energy to the second power supply unit so that the second power supply unit supplies power to the signal processing unit, so that the signal processing unit is powered on; The signal processing unit is configured to control the output control unit to be turned on for a preset time and then turned off, so that the battery module pre-charges the MPPT circuit, the inverter circuit and / or the control mainboard; The analog front-end unit is configured to control the output control unit to be turned on after the pre-charging is completed, so that the battery cell module powers on the MPPT circuit, the inverter circuit and / or the control main board.

6. The energy storage system according to any one of claims 3 to 5, characterized in that: The control mainboard also communicates with the signal processing unit, and the control mainboard is further configured to send a power-off instruction to the signal processing unit and power off when a power-off request is detected; The signal processing unit is further configured to send the power-off instruction to the analog front end unit, and control the MPPT circuit and the inverter circuit to power off according to the power-off instruction; The analog front end unit is further configured to power off after receiving the power off instruction.

7. The energy storage system according to claim 6, characterized in that: The output control unit comprises: A pre-charging resistor, one end of which is connected to the positive electrode of the battery module; A pre-charging transistor, wherein the first electrode is connected to the other end of the pre-charging resistor, the second electrode is connected to the control mainboard, the MPPT circuit and the inverter circuit, and the control electrode is connected to the signal processing unit; A first driving transistor, a first electrode of which is connected to the positive electrode of the battery module, and a control electrode of which is connected to the analog front-end unit; A second driving transistor, wherein the first electrode is connected to the second electrode of the first driving transistor, the second electrode is connected to the control mainboard, the MPPT circuit and the inverter circuit, and the control electrode is connected to the analog front end unit.

8. The energy storage system according to claim 7, characterized in that: The analog front end unit is further configured to detect the voltage and temperature of the battery module, and control the first driving transistor and the second driving transistor to be turned off when the voltage and / or the temperature are abnormal.

9. The energy storage system according to claim 6, characterized in that: The control mainboard includes a mainboard power supply unit, a communication interface and a controller. The control mainboard power supply unit is connected to the control output unit and the negative pole of the battery module; the communication interface is connected to the signal processing unit, and the controller is connected to the input end of the analog front-end unit.

10. A control method, characterized in that: For the energy storage system according to any one of claims 1 to 9, the control method comprises: Responding to a power-on request to control the integrated circuit board to power on; When the integrated circuit board is powered on, the integrated circuit board is controlled to supply power to the control main board so that the control main board is powered on.

11. The control method according to claim 10, characterized in that: The control method further comprises: Detecting a power-off request by the control mainboard; When the power-off request is detected, a power-off instruction is sent to the integrated circuit board to control the integrated circuit board to power off.

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