Control mainboard of energy storage equipment and energy storage equipment

Abstract

The invention discloses a control mainboard of an energy storage device and the energy storage device, the control mainboard comprises a plurality of functional circuits arranged on the same circuit substrate, each functional circuit comprises a switching circuit, the switching circuit is connected with a battery of the energy storage device, and electric connection between the battery and an external device is switched on or switched off; one end of the direct-current conversion circuit is electrically connected with the switching circuit, and the other end of the direct-current conversion circuit is electrically connected with a direct-current power supply or a direct-current load; one end of the AC-DC conversion circuit is electrically connected with the battery, and the other end of the AC-DC conversion circuit is electrically connected with an external load or an external AC power supply; and the control circuit is used for performing function control on each functional circuit in the energy storage equipment. Data transmission delay is reduced, a communication link is simplified, response efficiency is improved, the system size of the energy storage equipment is simplified, system wiring of the energy storage equipment is reduced, and production and manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically, to a control motherboard for an energy storage device and an energy storage device. Background Technology

[0002] Currently, portable energy storage systems typically have corresponding controllers for each functional component. For example, an inverter controller is set for the inverter, and a photovoltaic controller is set for the photovoltaic module. These controllers are independent of each other and control different functional components to achieve different functions.

[0003] While multiple independent controllers offer greater flexibility, implementing the functions of an energy storage system (such as discharge) requires communication and interaction between the controllers to coordinate the control and scheduling of components. This communication and information transmission results in a slower response rate for the energy storage system. Summary of the Invention

[0004] This application provides a control motherboard and energy storage device for an energy storage device. When realizing the functions of the energy storage system (such as the discharge function), it does not need to wait for the link time of communication interaction and information transmission, thereby improving the response rate of the energy storage system.

[0005] The control board of the energy storage device of this application includes multiple functional circuits disposed on the same circuit board. The functional circuits include: a switching circuit, which is connected to the battery of the energy storage device and turns the battery on or off from the external device; a DC-DC conversion circuit, which is used for DC voltage conversion, with one end electrically connected to the switching circuit and the other end electrically connected to a DC power supply or a DC load; an AC-DC conversion circuit, which is used for AC and DC conversion, with one end electrically connected to the battery and the other end electrically connected to an external load or an external AC power supply; and a control circuit, which is used to perform functional control on each of the functional circuits in the energy storage device, and is connected to the switching circuit, the DC-DC conversion circuit, and the AC-DC conversion circuit.

[0006] In some embodiments, the AC / DC conversion circuit is electrically connected to the battery via the switching circuit.

[0007] In some embodiments, the control circuit is connected to the AC / DC conversion circuit, and the control circuit is used to control the AC / DC conversion circuit to turn on or off.

[0008] In some embodiments, the functional circuit further includes a detection circuit for detecting electrical parameters flowing out of or into the battery. Based on the electrical parameters, the control circuit controls at least one of the switching circuit and the AC / DC conversion circuit to connect or disconnect the battery from the external device.

[0009] In some embodiments, the control circuit includes a controller, which includes a plurality of functional control modules, each of which controls a plurality of functional circuits.

[0010] In some implementations, multiple functional control modules are combined into a single controller through a co-packing process, and the multiple functional control modules are independent of each other.

[0011] In some embodiments, the plurality of functional control modules include a charging control module and a discharging control module, which are used to control the energy storage device to perform a power-on operation when the battery is not abnormal, the power-on operation including controlling the switching circuit to turn on.

[0012] In some embodiments, the switching circuit includes a charging circuit and a discharging circuit, the energy storage device includes a bus unit and a pre-charge switching transistor, and the charging control module is used to control the pre-charge switching transistor and the charging circuit to conduct in order to charge the bus capacitor; the discharging control module is used to control the discharging circuit to conduct when the voltage of the bus unit is greater than the threshold voltage of the energy storage device, so as to complete the power-on operation.

[0013] In some embodiments, the functional circuit further includes a peripheral control circuit connected to a peripheral device of the energy storage device; or, the energy storage device further includes a display motherboard connected to the peripheral device, and the control motherboard communicatively connected to the display motherboard.

[0014] In some embodiments, the DC-DC conversion circuit includes a maximum power point tracking circuit, and the DC power supply includes a photovoltaic device.

[0015] The energy storage device of this application includes a battery and a control motherboard of the energy storage device described in any of the above embodiments.

[0016] The control motherboard and energy storage device provided in this application integrate the control of various functional circuits of the energy storage device into a control circuit located on the control motherboard. The scheduling of different functional circuits can be realized based on the control circuit on the same circuit board. The functional circuits can share data by sharing the internal data of the control motherboard. The functional circuits no longer need to communicate based on UART signals (or CAN signals) before the next scheduling control, which can reduce the data transmission delay between functional circuits, simplify the communication link of the energy storage device, improve the response efficiency of the energy storage device, optimize the collaborative work of multiple functional circuits corresponding to the functions in the energy storage device, and improve the management efficiency and security of the energy storage system.

[0017] Furthermore, by integrating the controller of multiple functional circuits into a control circuit and placing it on the control motherboard, the smaller size of the control motherboard can simplify the system size of the energy storage device and reduce the system wiring, thereby reducing production and manufacturing costs.

[0018] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0020] Figure 1 This is a schematic diagram illustrating the application scenario of the control motherboard of an energy storage device according to certain embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the control motherboard of an energy storage device according to certain embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the control motherboard of an energy storage device according to certain embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the control motherboard of an energy storage device according to certain embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the control motherboard of an energy storage device according to certain embodiments of this application;

[0025] Figure 6 This is a schematic diagram of a control motherboard for an energy storage device according to certain embodiments of this application;

[0026] Figure 7This is a schematic diagram of the control board of an energy storage device according to certain embodiments of this application. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0028] To facilitate understanding of this application, the background of its emergence is explained below:

[0029] With the development of the new energy industry and the continuous innovation of battery technology, portable energy storage systems have been widely used in outdoor power supply, emergency power supply, mobile device charging and other scenarios.

[0030] Currently, portable energy storage systems typically employ distributed control modules (controllers), such as battery management control modules, inverter control modules, photovoltaic control modules, and temperature management control modules. These controllers operate independently, each controlling different components to achieve different functions. While multiple independent controllers offer high flexibility, communication between them is usually based on data transmission via Universal Asynchronous Receiver / Transmitter (UART) signals and / or Controller Area Network (CAN) signals. This results in low communication efficiency and a slow response rate for portable energy storage systems.

[0031] To address the aforementioned technical problems, this application provides a control motherboard for an energy storage device.

[0032] The following section will first introduce one application scenario of the technical solution of this application, such as... Figure 1 As shown, the control motherboard 10 of the energy storage device 100 provided in this application can be applied to, for example... Figure 1 In the application scenarios shown.

[0033] The control board 10 of the energy storage device 100 is used in the energy storage device 100.

[0034] The control board of the energy storage device of this application will be described in detail below, taking its application in an energy storage device as an example:

[0035] Please see Figure 1 and Figure 2This application provides a control motherboard 100 for an energy storage device 1000. The energy storage device 1000 includes a control motherboard 100 and a battery 200. The control motherboard 100 includes multiple functional circuits disposed on the same circuit board 10. The functional circuits include:

[0036] Switching circuit 20 is connected to battery 200 of energy storage device 1000 to turn on or off the electrical connection between battery 200 and the outside.

[0037] DC-DC conversion circuit 30 is used for DC voltage conversion. One end is electrically connected to switch circuit 20, and the other end is electrically connected to DC power supply or DC load.

[0038] AC / DC conversion circuit 40 is used to convert AC power to DC power. One end is electrically connected to battery 200, and the other end is electrically connected to an external load or an external AC power source.

[0039] The control circuit 50 is used to control the functions of various functional circuits in the energy storage device 1000. The control circuit 50 is connected to the switch circuit 20, the DC-DC conversion circuit 30 and the AC-DC conversion circuit 40.

[0040] The battery 200 can be used to store electrical energy. For example, the battery 200 may include multiple battery cells, which are used to store electrical energy. The charging and discharging of the energy storage device 1000 is achieved through the charging and discharging of the multiple battery cells.

[0041] Among them, the functional circuit can be a circuit in the energy storage device 1000 used to realize various functions of the energy storage device 1000 (e.g., photovoltaic charging function, AC discharge function, etc.).

[0042] The switching circuit 20 is electrically connected to the battery 200 at one end and to an external device at the other end. It can be used to control the electrical connection between the battery 200 of the energy storage device 1000 and the external device. For example, it can be used to control the electrical connection between the battery 200 and an external charging device that charges the battery 200.

[0043] Optionally, the DC-DC conversion circuit 30 includes a maximum power point tracking circuit (MPPT circuit), and the DC power supply includes a photovoltaic device.

[0044] Please refer to Figure 2One end of the DC-DC converter circuit 30 is electrically connected to the switching circuit 20, and the other end is electrically connected to an external DC power supply or DC load. The DC-DC converter circuit 30 can be a unidirectional DC / DC circuit or a bidirectional DC / DC circuit. The DC / DC circuit can convert current into voltage. The DC-DC converter circuit 30 includes an MPPT circuit. For example, based on the DC / DC circuit, the MPPT circuit can convert the voltage input to the battery 200 by the photovoltaic device into a preset voltage that matches the voltage of the battery 200.

[0045] The AC / DC conversion circuit 40 is electrically connected to the battery 200 at one end and to an external load or an external AC power source at the other end. The AC / DC conversion circuit 40 can be an inverter or a unidirectional / bidirectional DC / AC circuit used for converting between AC and DC power. For example, based on the DC / AC circuit, the DC power output from the battery 200 can be converted into AC power usable by the AC load.

[0046] Please refer to Figure 2 and Figure 3 The AC / DC conversion circuit 40 may include a DC conversion sub-circuit and an AC conversion sub-circuit. The DC conversion circuit 30 is used to convert the voltage of the current, and the AC conversion sub-circuit is used to realize the conversion between AC and DC power.

[0047] The control circuit 50 can be used to control various functional circuits to realize the various functions of the energy storage device 1000. For example, both the DC-DC conversion circuit 30 and the AC-DC conversion circuit 40 are equipped with corresponding switching devices (such as relays). The control circuit 50 can control the DC-DC conversion circuit 30 and the AC-DC conversion circuit 40 by controlling the closing and opening of the corresponding switching devices.

[0048] Optionally, the AC / DC conversion circuit 40 is electrically connected to the battery 200 via the switching circuit 20.

[0049] The AC / DC conversion circuit 40 has one end electrically connected to an external load or an external AC power source, and the other end can be directly connected to the battery 200 (e.g., ...). Figure 2 Alternatively, the other end is electrically connected to the switching circuit 20, and then electrically connected to the battery 200 via the switching circuit 20 (e.g., ...). Figure 3 ).

[0050] Optionally, the control circuit 50 can be used to control the charging and discharging power of the DC-DC conversion circuit 30 and the AC-DC conversion circuit 40. For example, taking the AC-DC conversion circuit 40 as an example, the control circuit 50 can control the charging and discharging power of the battery 200 when it is charging and discharging based on the AC-DC conversion circuit 40 by controlling the duty cycle of the AC-DC conversion circuit 40; as another example, taking the AC-DC conversion circuit 40 as an example, and the AC-DC conversion circuit 40 includes a switch array, the control circuit 50 can control the charging and discharging power of the battery 200 when it is charging and discharging based on the AC-DC conversion circuit 40 by controlling the on and off combinations of the switch array.

[0051] Optionally, the functional circuit also includes a detection circuit 60 for detecting electrical parameters flowing out of or into the battery 200. Based on the electrical parameters, the control circuit 50 controls at least one of the switching circuit 20 and the AC / DC conversion circuit 40 to turn on or off the electrical connection between the battery 200 and the external device.

[0052] Please participate Figure 3 One end of the detection circuit 60 is electrically connected to the battery 200, and the other end is electrically connected to the control circuit 50. The detection circuit 60 can be used to detect electrical parameters (such as voltage and current) flowing into or out of the battery 200. For example, taking a battery 200 that includes multiple battery cells as an example, the detection circuit 60 can detect the electrical parameters flowing into or out of each battery cell, and can also be used to acquire the battery parameters (such as temperature) of each battery cell. Based on the electrical parameters and battery parameters of each battery cell, fault detection can be performed on each battery cell to determine whether there is an abnormality in the battery 200.

[0053] Preset threshold ranges can be set for various electrical parameters. For example, taking voltage as an example, if the detection circuit 60 detects that the voltage flowing into or out of the battery 200 is greater than the maximum value of the preset threshold range (preset voltage threshold range), the battery 200 can be considered to have an overvoltage fault. If the voltage is less than the minimum value of the preset threshold range (preset voltage threshold range), the battery 200 can be considered to have an undervoltage fault. Therefore, based on the electrical parameters, if the electrical parameters do not meet the preset conditions (e.g., greater than the maximum value of the preset threshold range, or less than the minimum value of the preset threshold range, or greater than the preset threshold, etc.), it can be determined that the battery 200 is faulty. The control circuit 50 then controls the switching circuit 20 to disconnect the battery 200 (and / or controls the AC conversion circuit to disconnect), thereby disconnecting the battery 200 from the external device.

[0054] For example, the battery state or operating condition can be determined based on electrical parameters. For instance, if the detected electrical parameter (taking current as an example) of the battery 200 is less than the preset operating current, it can be assumed that the remaining charge of the battery 200 is low and needs to be charged. The AC / DC conversion circuit 40 can be turned on by the control circuit 50 so that the external AC power supply can charge the battery 200 through the AC / DC conversion circuit 40.

[0055] Optionally, the functional circuit also includes a peripheral control circuit 70, which is connected to the peripheral devices of the energy storage device 1000.

[0056] Alternatively, the energy storage device 1000 may also include a display motherboard, which is connected to peripheral devices, and the control motherboard 100 is communicatively connected to the display motherboard.

[0057] The peripheral devices may include a Universal Serial Bus (USB), a Type-C interface, a car charger interface, light-emitting diodes (LEDs) of the energy storage device 1000, and a display screen, etc.

[0058] The functional circuit may also include a peripheral control circuit 70, one end of which is electrically connected to the control circuit 50, and the other end is electrically connected to the peripheral device. For example, if the peripheral device includes a USB interface, the control circuit 50 can enable the output of the USB interface by turning on the peripheral control circuit 70.

[0059] Alternatively, the energy storage device 1000 may also include a display motherboard, which is connected to a peripheral device (display screen), and the control motherboard 100 is communicatively connected to the display motherboard. For example, the control motherboard 100 may, based on its communication connection with the display motherboard, send information such as the operating conditions of the battery 200 (e.g., charging conditions, power-on conditions, etc.), the status of the battery 200 (e.g., remaining charge of the battery 200), and electrical parameters to the display motherboard, and then display them on the display screen through the connection between the display motherboard and the display screen.

[0060] Specifically, the energy storage device 1000 includes a battery 200 and a control main board 100. The control main board 100 includes multiple functional circuits mounted on the same circuit board. Based on the on and / or off states of these functional circuits, the energy storage device 1000 can realize various functions (e.g., charging and discharging functions). The functional circuits include a switching circuit 20, a DC-DC conversion circuit 30, an AC-DC conversion circuit 40, and a control circuit 50. The control circuit 50 is electrically connected to the switching circuit 20, the DC-DC conversion circuit 30, and the AC-DC conversion circuit 40. The control circuit 50 can directly control the on or off states of the switching circuit 20, the DC-DC conversion circuit 30, and the AC-DC conversion circuit 40 to achieve functional control of the various functional circuits in the energy storage device 1000.

[0061] In current energy storage devices 1000, typically, each of the inverter system, the Maximum Power Point Tracking (MPPT) photovoltaic system, and the Battery Management System (BMS) has its own controller. A host controller is then used to communicate and schedule control with each of the three controllers via UART (or CAN) signals. Each of the three controllers needs to independently perform its corresponding scheduling and control functions (e.g., charge / discharge management, fault detection). After completing their respective scheduling and control functions, they communicate with the host controller to share data and coordinate control of the energy storage device 1000. For example, upon receiving a control command (to view battery information), the host controller communicates with the BMS controller via UART. The BMS controller then receives the information and sends the battery information back to the host controller via UART. The host controller then responds accordingly. Therefore, under the control framework of one main controller and three independent controllers, the response rate of the energy storage device 1000 is limited by the communication rate between the main controller and the three controllers; furthermore, multiple independent controllers can easily lead to insufficient coordination, which further affects the response efficiency of the energy storage device 1000.

[0062] The control board 100 of the energy storage device 100 of this application, by setting up a control circuit 50, can realize the conduction and / or shutdown of the functional circuits of various functions of the energy storage device 1000, so that the energy storage device 1000 can realize various functions, simplifying the control system of the energy storage device 1000, and making the control method of the energy storage device 1000 simpler and more efficient.

[0063] For example, please refer to again Figure 2 and Figure 3By controlling the various functional circuits through the control circuit 50, the MPPT system (e.g., controlling the DC-DC conversion circuit 30), the BMS system (e.g., controlling the switching circuit 20, the detection circuit 60, etc.), and the inverter system (e.g., controlling the AC-DC conversion circuit 40) can be controlled. The control circuit 50 also has the function of controlling other peripherals (such as USB, TYPE-C interface, car charger, and LED control of energy storage device 1000, etc.).

[0064] In other words, by integrating the control of various functional circuits of the energy storage device 1000 into the control circuit 50, which is located on the control motherboard 100, the scheduling of different functional circuits can be achieved based on the control circuit 50 on the same control motherboard 100. The functional circuits can share data by sharing the internal data of the control motherboard 100. The functional circuits no longer need to communicate based on UART signals (or CAN signals) before proceeding with the next scheduling control. This reduces the data transmission delay between functional circuits, simplifies the communication link of the energy storage device 1000, improves the response efficiency of the energy storage device 1000, optimizes the collaborative work of multiple functional circuits corresponding to different functions in the energy storage device 1000, and improves the management efficiency and security of the energy storage system.

[0065] Furthermore, by integrating the controller of multiple functional circuits into a control circuit 50 and placing it on the control motherboard 100, the control motherboard 100 occupies a smaller volume, which can simplify the system size of the energy storage device 1000 and reduce the system wiring of the energy storage device 1000, thereby reducing production and manufacturing costs.

[0066] Please see Figure 4 In some embodiments, the control circuit 50 includes a controller 51, which includes multiple functional control modules, each of which controls multiple functional circuits.

[0067] The control circuit 50 includes a controller 51, which may include a digital signal processing chip (DSP), a microcontroller unit (MCU), etc. For ease of description, as follows: Figure 1 As shown, the explanation will be based on the example of a control motherboard 100 including a DSP chip; in other words, the explanation will be based on the example of a control motherboard 100 including a DSP control motherboard 100.

[0068] Optionally, the control motherboard 100 can be used to run an energy storage management system, which includes multiple functional control modules. The energy storage management system can be a system that controls various functional components of the energy storage device 1000 based on algorithms and data processing to realize various functions of the energy storage device 1000 (e.g., detecting battery information of the energy storage device 1000). For example, please refer to... Figure 5 The control motherboard 100 can run the energy storage management system 500, which includes a function control module 501, a function control module 502, and a function control module 503. The function control modules can be virtual modules, and each function control module implements a specific function based on the function circuit of the control motherboard 100.

[0069] Each of the multiple functional control modules controls a different functional circuit. For example, each functional control module corresponds one-to-one with a specific functional circuit (see, for example, [reference needed]). Figure 4 The MPPT function control module 511 on the controller 51 is used to control the DC-DC conversion circuit 30, the BMS function control module 512 is used to control the detection circuit 60, the inverter function control module 513 is used to control the AC-DC conversion circuit 40, and the peripheral function control module 514 is used to control the peripheral control circuit 70. Based on the conduction of the switch circuit 20, it realizes the connection with the external load 21, the AC / DC load 22, the external photovoltaic device 401, and the external AC power supply 301, etc.; for example, one function control module can control multiple function circuits; for example, multiple function control modules can all control the same function circuit, etc.

[0070] Optionally, multiple functional control modules can be combined into a single controller through a co-packing process, while the multiple functional control modules remain independent of each other.

[0071] Among them, the co-packaged chip is a customized chip that integrates multiple chips or electronic modules with different functions to form a system or subsystem. Multiple functional control modules can be combined into a single controller based on the co-packaged process, in which each functional control module operates independently.

[0072] Please see Figure 6 Optionally, the multiple functional control modules include a battery management module and a fault diagnosis module. The battery management module is used to acquire information from the battery 200 in order to monitor the energy storage device 1000.

[0073] For example, taking a battery 200 comprising multiple battery cells as an example, the battery management module can be used to acquire the voltage and current of each battery cell to monitor the total voltage and current of the energy storage device 1000; furthermore, the battery management module can also be used to monitor the temperature of the energy storage device 1000; furthermore, the battery management module can also be used to acquire information about each battery cell of the energy storage device 1000 to monitor the state of the energy storage device 1000 (e.g., State of Charge (SOC), State of Health (SOH), State of Energy (SOE), and Remaining Useful Life (RUL)); furthermore, the battery management module can also be used for battery 200 balancing (balancing the capacity, state, etc. of each battery cell). The fault diagnosis module can diagnose whether there are any abnormalities in the battery 200 by using the information (e.g., electrical parameters) of the battery 200 (taking a battery comprising multiple battery cells as an example) acquired by the detection circuit 60. For example, taking battery 200, which includes multiple battery cells, as an example, the fault diagnosis module can determine whether there is a temperature fault in a battery cell by comparing the temperature of each battery cell in the energy storage device 1000 with a preset temperature threshold.

[0074] Please see Figure 6 Optionally, the multiple functional control modules include a charging control module and a discharging control module. The charging control module and the discharging control module are used to control the energy storage device 1000 to perform a power-on operation when the battery 200 is normal. The power-on operation includes controlling the switching circuit 20 to turn on.

[0075] Specifically, in the current energy storage device 1000 with a main controller and three controllers, when powering on the energy storage device 1000, the main controller generally sends a monitoring command to the BMS system controller. Upon receiving the monitoring command via UART signal, the BMS system controller then obtains information about the individual battery cells and performs fault detection on them. If no abnormalities are detected, the BMS system controller reports the individual battery cell information and a signal indicating no abnormalities to the individual battery cells to the main controller via UART signal. After obtaining this information and signal, the main controller sends a power-on command to the BMS system controller via UART signal. Upon receiving the power-on command, the BMS system controller controls the power-on process and, after power-on completion, sends a power-on completion signal to the main controller via UART signal.

[0076] The control motherboard 100 of this application is equipped with multiple functional control modules, including a charging control module and a discharging control module. When powering on the energy storage device 1000, communication between controllers is not required. Only when the fault diagnosis module determines that there is no fault in the energy storage device 1000, the charging control module and the discharging control module of the control motherboard 100 cooperate to perform the power-on operation, that is, the power-on is completed by controlling the switch circuit 20 to conduct.

[0077] Optionally, the switching circuit 20 includes a charging circuit and a discharging circuit, the energy storage device 1000 includes a bus capacitor and a pre-charge switching transistor, and the charging control module is used to control the pre-charge switching transistor and the charging circuit to conduct in order to charge the bus unit.

[0078] The discharge control module is used to control the discharge circuit to conduct when the voltage of the bus unit is greater than the threshold voltage of the energy storage device 1000, so as to complete the power-on operation.

[0079] Please refer to Figure 7 The switching transistors of the energy storage device 1000 include metal-oxide-semiconductor field-effect transistors (MOS transistors), the pre-charge switching transistors include pre-charge MOS transistors, the charging circuit includes charging MOS transistors, and the discharging circuit includes discharging MOS transistors.

[0080] The threshold voltage of the energy storage device 1000 can be a preset voltage value, or it can be determined based on the current voltage of the energy storage device 1000 collected in real time (for example, it can be 80%, 85%, 90% of the current voltage, etc.).

[0081] Specifically, please refer to Figure 3 , Figure 6 and Figure 7 Based on the electrical parameters obtained by the detection circuit 60, and if the fault diagnosis module determines that the energy storage device 1000 is not faulty, when the energy storage device 1000 performs a power-on operation, it can first control the pre-charge switch and the charging circuit (pre-charge MOSFET and charging MOSFET) to close through the charging control module, pre-charging the bus unit (e.g., bus capacitor) to avoid current surges to the various components inside the energy storage device 1000. If the voltage of the bus capacitor is greater than the threshold voltage of the energy storage device 1000, the discharge control module then controls the discharge circuit (discharge MOSFET) to close, thereby achieving precise control of the current inside the energy storage device 1000. After the discharge MOSFET closes, the current path inside the energy storage device 1000 is established, and the energy storage device 1000 can operate normally, thus confirming that the energy storage device 1000 has completed the power-on operation.

[0082] Optionally, the function control module also includes a communication management module, which is used to communicate with the display motherboard after the energy storage device 1000 is powered on, so as to control the peripheral device (display screen) to display the information of the energy storage device 1000.

[0083] Specifically, the energy storage device 1000 also includes a display screen, which can be used to display information about the energy storage device 1000, such as the remaining power of the energy storage device 1000. The function control module also includes a communication management module. When the energy storage device 1000 completes the power-on operation, the control motherboard 100 can communicate with the display motherboard through the communication management module to control the display screen of the peripheral device to display information about the completion of the power-on of the energy storage device 1000 and the energy storage information of the energy storage device 1000 (e.g., remaining power).

[0084] In some implementations, the discharge control module is used to control the energy storage device 1000 to discharge through the DC-DC conversion circuit 30 or through the AC-DC conversion circuit 40, based on the control circuit 50, when there are no abnormalities in the individual battery cells.

[0085] Specifically, in the current energy storage device 1000 with a main controller and three controllers, when the energy storage device 1000 is discharging, the main controller and the BMS system controller typically communicate to power on the energy storage device 1000. After the energy storage device 1000 is powered on, the main controller communicates with the inverter system controller via UART signals. Upon receiving a discharge command in the communication signal, the inverter system controller requests information from the battery 200 (e.g., through communication with the main controller, followed by forwarding communication between the main controller and the BMS system controller; or, for example, through direct communication between the inverter system controller and the BMS system controller via UART signals). Based on the continuously acquired battery 200 information, the inverter system controller continuously adjusts and controls the inverter output power to ensure that the energy storage device 1000 can discharge at a level less than its maximum load capacity. During the discharge process, the control flow is complex, and the back-and-forth communication can easily lead to untimely power adjustments, thus posing a risk of damage to the energy storage device 1000.

[0086] Please see Figure 6 The control motherboard 100 of this application is equipped with multiple functional control modules, including a discharge control module. When the energy storage device 1000 is powered on and the fault diagnosis module determines that the energy storage device 1000 is not faulty, there is no need for communication between modules. The discharge control module controls the battery 200 (each battery cell) to discharge; or, the discharge control module controls the battery 200 and the inverter to cooperate to complete the discharge.

[0087] It is understandable that, even when the energy storage device is discharging at 1000 kWh, the discharge control module can still be controlled by the battery management module of the functional control module to discharge.

[0088] Optionally, the functional control module also includes an energy management module, which is used to obtain the preset discharge power of the energy storage device 1000. The discharge control module is used to control the discharge of the energy storage device 1000 or the discharge of the energy storage device 1000 and the inverter based on the preset discharge power and under the condition that there are no abnormalities in each battery cell.

[0089] Please refer to Figure 6 The energy management module can be a module that manages the input energy (e.g., photovoltaic input energy input through the connection of DC-DC conversion circuit 30 and photovoltaic equipment, and AC input energy input through the connection of AC-DC conversion circuit 40 and AC power supply, etc.) and output energy (e.g., AC output energy output through the connection of AC-DC conversion circuit 40 and load, and interface (e.g., USB, TYPE-C interface) output energy, etc.) of the energy storage device 1000. For example, the energy management module can manage the maximum charging power and maximum discharging power of the energy storage device 1000; as another example, the energy management module determines the charging power of the energy storage device 1000 in real time when the energy storage device 1000 is charging; and determines the discharging power of the energy storage device 1000 in real time when the energy storage device 1000 is discharging.

[0090] The preset discharge power can be the maximum discharge power or real-time discharge power of the energy storage device 1000 during AC discharge.

[0091] Specifically, when the energy storage device 1000 is discharging (for example, when the control motherboard 100 receives a power-on command), the maximum discharge power of the energy storage device 1000 during AC discharge can be determined by the energy management module. Then, based on the maximum discharge power, the discharge power of the inverter can be controlled by the discharge control module to achieve real-time response and adjustment of the energy storage device 1000 during discharge, thereby improving the response rate of the energy storage device 1000.

[0092] In some embodiments, the energy storage device 1000 further includes an AC charging and discharging interface, one end of the AC / DC conversion circuit 40 is electrically connected to the AC / DC charging interface, and the other end is electrically connected to the battery 200 of the energy storage device 1000. The functional control module further includes a charging control module, which is used to control the AC / DC conversion circuit 40 to charge the energy storage device 1000 when an AC charging command is received.

[0093] The AC charging interface is used to connect to an external AC power source (e.g., mains power).

[0094] Specifically, in the current energy storage device 1000 with a main controller and three controllers, during charging of the energy storage device 1000, the main controller and the BMS system controller typically communicate to power on the energy storage device 1000. After the energy storage device 1000 is powered on, the main controller communicates with the inverter system controller based on UART signals. Upon receiving the charging command in the communication signal, the inverter system controller requests battery 200 information (for example, by communicating with the main controller and then relaying the communication between the main controller and the BMS system controller to obtain battery 200 information; or, for example, by directly communicating between the inverter system controller and the BMS system controller via UART signals to obtain battery 200 information). Based on the continuously acquired battery 200 information, the inverter system controller continuously adjusts and controls the inverter input power (charging power) to charge the energy storage device 1000.

[0095] The energy storage device 1000 of this application also includes an AC charging / discharging interface. One end of the AC / DC conversion circuit 40 is electrically connected to the AC / DC charging interface, and the other end is electrically connected to the battery 200 of the energy storage device 1000. For example, taking AC mains power as an external AC power source, the AC mains power enters the energy storage device 1000 through the AC charging / discharging interface. The AC / DC conversion circuit 40 converts the AC power into DC power and outputs the DC power to the battery 200 of the energy storage device 1000 to store energy and complete the charging. The functional control module also includes a charging control module. After confirming that the energy storage device 1000 has been powered on, if an AC charging command is received, the AC / DC conversion circuit 40 can be controlled to charge the energy storage device 1000.

[0096] Optionally, the function control module also includes an energy management module, which is used to obtain the preset charging power of the energy storage device 1000, and the charging control module is used to control the AC-DC conversion circuit 40 to charge the energy storage device 1000 when an AC charging command is received.

[0097] The preset charging power can be the maximum AC charging power of the energy storage device 1000 or the real-time charging power of the energy storage device 1000.

[0098] Specifically, when the energy storage device 1000 is powered on, if an AC charging command is received, the real-time charging power (or maximum charging power, etc.) of the energy storage device 1000 during charging can be obtained through the energy management module. Then, the duty cycle of the AC-DC conversion circuit 40 can be controlled through the discharge control module to charge the energy storage device 1000 with the corresponding charging power.

[0099] In some embodiments, the energy storage device 1000 further includes a photovoltaic charging and discharging interface connected to a photovoltaic device. The functional control module also includes a charging control module, which controls the DC-DC conversion circuit 30 to charge the energy storage device 1000 upon receiving a photovoltaic charging command.

[0100] Specifically, in the current energy storage device 1000 with a main controller and three controllers, during charging of the energy storage device 1000, the main controller and the BMS system controller typically communicate to power on the energy storage device 1000. After the energy storage device 1000 is powered on, the main controller communicates with the photovoltaic system controller based on UART signals. Upon receiving the charging command in the communication signal, the photovoltaic system controller requests information about the battery 200 (for example, by communicating with the main controller and then relaying the information between the main controller and the BMS system controller; or, for example, by directly communicating between the inverter system controller and the BMS system controller via UART signals to obtain the battery 200 information). Based on the continuously acquired battery 200 information and the photovoltaic charging power calculated in real time by the photovoltaic system controller, the photovoltaic system controller continuously adjusts and controls the photovoltaic input power (photovoltaic charging power) to charge the energy storage device 1000.

[0101] The energy storage device 1000 of this application also includes a photovoltaic charging and discharging interface. One end of the DC-DC conversion circuit 30 is connected to the photovoltaic charging and discharging interface, and the other end is connected to the switching circuit 20. The electrical energy of the photovoltaic device can be transmitted to the DC-DC conversion circuit 30 through the photovoltaic charging and discharging interface, and then, after passing through the switching circuit 20, to the battery 200 of the energy storage device 1000 to charge the battery 200. The functional control module also includes a charging control module. If a charging command is received after the energy storage device 1000 has been powered on, the charging control module will charge the energy storage device 1000.

[0102] Optionally, the function control module also includes an energy management module, which is used to determine the real-time charging power of the energy storage device 1000 based on a preset photovoltaic charging algorithm. The charging control module is used to charge the energy storage device 1000 based on the real-time charging power when a photovoltaic charging command is received.

[0103] The preset photovoltaic charging algorithm is the MPPT algorithm.

[0104] Specifically, once the energy storage device 1000 is powered on, if a photovoltaic charging command is received, the energy management module can first determine the current charging power based on the real-time photovoltaic charging power calculated by MPPT, and then the charging control module can control the photovoltaic charging interface to charge the battery 200 of the energy storage device 1000.

[0105] Optionally, the function control module also includes an interface module for receiving control commands.

[0106] Specifically, the function control module also includes an interface module, which can be connected to user buttons (e.g., the power-on button, charging button, and discharging button of the energy storage device 1000) to receive control commands; for example, the interface module can also be connected to a display screen to receive control commands issued by the user through the display screen.

[0107] Optionally, the communication module is used for communication management of the energy storage device 1000. For example, based on the communication module, control commands can be received from terminals, servers, etc. connected to the energy storage device 1000.

[0108] Optionally, the fault diagnosis module can also be used to diagnose various functional circuits (e.g., AC / DC conversion circuit 40, switching circuit 20, and DC conversion circuit 30).

[0109] Please refer to it again. Figure 1 The energy storage device 1000 of this application includes the control motherboard 100 of the energy storage device 1000 described in any of the above embodiments, which will not be described again here for the sake of brevity.

[0110] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0111] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0112] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control motherboard for an energy storage device, characterized in that, The control motherboard includes multiple functional circuits mounted on the same circuit board, the functional circuits including: A switching circuit is connected to the battery of the energy storage device to turn the battery on or off the electrical connection with an external device. A DC-DC converter circuit is used for voltage conversion of DC power. One end is electrically connected to the switching circuit, and the other end is electrically connected to a DC power supply or a DC load. An AC / DC conversion circuit is used to convert AC power to DC power. One end is electrically connected to the battery, and the other end is electrically connected to an external load or an external AC power source. A control circuit is provided for controlling the functions of each of the functional circuits in the energy storage device.

2. The control motherboard of the energy storage device according to claim 1, characterized in that, The AC / DC conversion circuit is electrically connected to the battery through the switching circuit.

3. The control motherboard of the energy storage device according to claim 1, characterized in that, The control circuit is connected to the AC / DC conversion circuit, and the control circuit is used to control the AC / DC conversion circuit to turn on or off.

4. The control motherboard of the energy storage device according to claim 1, characterized in that, The functional circuit also includes a detection circuit for detecting electrical parameters flowing out of or into the battery. Based on the electrical parameters, the control circuit controls at least one of the switching circuit and the AC / DC conversion circuit to connect or disconnect the battery from the external device.

5. The control motherboard of the energy storage device according to claim 1, characterized in that, The control circuit includes a controller, which includes multiple functional control modules, each of which controls a plurality of functional circuits.

6. The control motherboard of the energy storage device according to claim 5, characterized in that, Multiple functional control modules are combined into a single controller through a packaging process, and the multiple functional control modules are independent of each other.

7. The control motherboard of the energy storage device according to claim 5 or 6, characterized in that, The plurality of functional control modules include a charging control module and a discharging control module. The charging control module and the discharging control module are used to control the energy storage device to perform a power-on operation when the battery is not abnormal. The power-on operation includes controlling the switching circuit to turn on.

8. The control motherboard of the energy storage device according to claim 7, characterized in that, The switching circuit includes a charging circuit and a discharging circuit, the energy storage device includes a bus unit and a pre-charge switching transistor, and the charging control module is used to control the pre-charge switching transistor and the charging circuit to conduct in order to charge the bus capacitor. The discharge control module is used to control the discharge circuit to conduct when the voltage of the bus unit is greater than the threshold voltage of the energy storage device, so as to complete the power-on operation.

9. The control motherboard of the energy storage device according to claim 1, characterized in that, The functional circuit also includes an external control circuit, which is connected to the external devices of the energy storage device; Alternatively, the energy storage device may further include a display motherboard, which is connected to the peripheral device, and the control motherboard is communicatively connected to the display motherboard.

10. The control motherboard of the energy storage device according to claim 1, characterized in that, The DC-DC conversion circuit includes a maximum power point tracking circuit, and the DC power supply includes a photovoltaic device.

11. An energy storage device, characterized in that, The energy storage device includes a battery and a control motherboard of the energy storage device according to any one of claims 1-10.

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