Control mainboard of energy storage equipment and energy storage equipment

Abstract

The utility model 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, and the control circuit is connected with the switching circuit, the direct current conversion circuit and the alternating current and direct current conversion circuit. 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] The present application relates to the technical field of energy storage, and more particularly, to a control mainboard of an energy storage device and the energy storage device. BACKGROUND

[0002] At present, a portable energy storage system usually sets a corresponding controller for each functional component, for example, sets an inverter controller for an inverter, sets a photovoltaic controller for a photovoltaic component, and the like. These controllers are independent of each other and control different functional components to realize different functions.

[0003] Although the multiple independent controllers have the advantage of high flexibility, when realizing the function (such as the discharging function) of the energy storage system, information transmission needs to be performed based on the communication interaction between the controllers to coordinate the control and scheduling between the components, so as to realize the function. The communication interaction and information transmission result in a slow response rate of the energy storage system. SUMMARY

[0004] The embodiments of the present application provide a control mainboard of an energy storage device and the energy storage device. In the case of realizing the function (such as the discharging function) of the energy storage system, the link time of communication interaction and information transmission is not needed, and the response rate of the energy storage system is improved.

[0005] The control mainboard of the energy storage device of the present application includes multiple functional circuits arranged on the same circuit substrate. The functional circuits include: a switching circuit connected to a battery of the energy storage device, which opens or closes the electrical connection between the battery and an external device; a direct current conversion circuit for voltage conversion of direct current, one end of which is electrically connected to the switching circuit, and the other end of which is electrically connected to a direct current power supply or a direct current load; an alternating current-direct current conversion circuit for conversion between alternating current and direct current, one end of which is electrically connected to the battery, and the other end of which is electrically connected to an external load or an external alternating current power supply; and a control circuit for function control of each of the functional circuits in the energy storage device, which is connected to the switching circuit, the direct current conversion circuit, and the alternating current-direct current conversion circuit.

[0006] In some embodiments, the alternating current-direct current conversion circuit is electrically connected to the battery through the switching circuit.

[0007] In some embodiments, the control circuit is connected to the alternating current-direct current conversion circuit, and the control circuit is used to control the conduction or turn-off of the alternating current-direct current conversion circuit.

[0008] In some embodiments, the functional circuit further comprises a detection circuit configured to detect an electrical parameter flowing out of or to the battery, and the control circuit is configured to control at least one of the switching circuit and the AC-DC conversion circuit to turn on or off the electrical connection between the battery and the external device based on the electrical parameter.

[0009] In some embodiments, the control circuit comprises a controller comprising a plurality of functional control modules, each of the plurality of functional control modules being configured to control one of the plurality of functional circuits.

[0010] In some embodiments, the plurality of functional control modules are combined into one controller through a packaging process, and the plurality of functional control modules are independent of each other.

[0011] In some embodiments, the plurality of functional control modules comprise a charging control module and a discharging control module, and the charging control module and the discharging control module are configured to control the energy storage device to perform a power-on operation in the absence of an abnormality of the battery, the power-on operation comprising controlling the switching circuit to turn on.

[0012] In some embodiments, the switching circuit comprises a charging circuit and a discharging circuit, the energy storage device comprises a bus unit and a pre-charge switch tube, the charging control module is configured to control the pre-charge switch tube and the charging circuit to turn on to charge the bus capacitor, and the discharging control module is configured to control the discharging circuit to turn on to complete the power-on operation when the voltage of the bus unit is greater than a threshold voltage of the energy storage device.

[0013] In some embodiments, the functional circuit further comprises a peripheral control circuit connected to a peripheral device of the energy storage device, or the energy storage device further comprises a display mainboard connected to the peripheral device, and the control mainboard is in communication connection with the display mainboard.

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

[0015] The energy storage device of the present application comprises a battery and a control mainboard of the energy storage device according to any one of the embodiments described above.

[0016] The control mainboard of the energy storage device and the energy storage device provided by the embodiments of the present application integrate the control of each functional circuit of the energy storage device into the control circuit, the control circuit is arranged on the control mainboard, the scheduling of different functional circuits can be realized based on the control circuit on the same circuit substrate, the data sharing between the functional circuits can be realized by sharing the internal data of the control mainboard, the functional circuits no longer need to communicate based on the UART signal (or CAN signal) and then perform the next scheduling control, the data transmission delay between the functional circuits can be reduced, the communication link of the energy storage device can be simplified, the response efficiency of the energy storage device can be improved, the cooperative work of the functional circuits corresponding to multiple functions in the energy storage device is optimized, and the management efficiency and safety of the energy storage system are improved.

[0017] In addition, after the controllers of the multiple functional circuits are integrated into the control circuit and arranged on the control mainboard, the volume occupied by the control mainboard is smaller, the system volume of the energy storage device can be simplified, and the system wiring of the energy storage device can be reduced, thereby reducing the production and manufacturing costs.

[0018] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out hereinafter in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

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

[0020] Figure 1 is a schematic diagram of an application scenario of the control mainboard of the energy storage device according to some embodiments of the present application;

[0021] Figure 2 is a schematic diagram of the principle of the control mainboard of the energy storage device according to some embodiments of the present application;

[0022] Figure 3 is a schematic diagram of the principle of the control mainboard of the energy storage device according to some embodiments of the present application;

[0023] Figure 4 is a schematic diagram of the principle of the control mainboard of the energy storage device according to some embodiments of the present application;

[0024] Figure 5 is a schematic diagram of the principle of the control mainboard of the energy storage device according to some embodiments of the present application;

[0025] Figure 6 is a schematic diagram of the principle of the control mainboard of the energy storage device according to some embodiments of the present application;

[0026] Figure 7is a schematic diagram of a control mainboard of an energy storage device according to some embodiments of the present application. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same or similar reference numbers throughout the drawings and have the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are for the purpose of explaining the embodiments of the present application, and should not be understood as limiting the embodiments of the present application.

[0028] To facilitate understanding of the present application, the background of the present application is explained as follows:

[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 usually use decentralized control modules (controllers), such as battery management control modules, inverter control modules, photovoltaic control modules, temperature management control modules, etc. These controllers are independent of each other and control different components to achieve different functions. Although multiple independent controllers have the advantage of high flexibility, the communication between each controller is usually based on Universal Asynchronous Receiver / Transmitter (UART) signals and / or Controller Area Network (CAN) signals to transmit data and achieve communication, resulting in low communication efficiency between each controller, which leads to slow response rate of the portable energy storage system.

[0031] To solve the above technical problems, the embodiments of the present application provide a control mainboard of an energy storage device.

[0032] First, an application scenario of the technical solution of the present application will be introduced, as shown in Figure 1 The control mainboard 10 of the energy storage device 100 provided by the present application can be applied to the application scenario as shown in Figure 1

[0033] The control mainboard 10 of the energy storage device 100 is applied to the energy storage device 100.

[0034] The control mainboard of the energy storage device of the present application will be described in detail below, taking the application of the control mainboard to the energy storage device as an example:

[0035] Please refer to Figure 1 and Figure 2 ​The application provides a control mainboard 100 of an energy storage device 1000, the energy storage device 1000 comprising the control mainboard 100 and a battery 200, the control mainboard 100 comprising a plurality of functional circuits arranged on the same circuit substrate 10, the functional circuits comprising:

[0036] a switching circuit 20 connected to the battery 200 of the energy storage device 1000, the switching circuit 20 being configured to connect or disconnect the battery 200 to an external device;

[0037] a direct current conversion circuit 30 configured to convert a voltage of a direct current, one end of the direct current conversion circuit 30 being electrically connected to the switching circuit 20, and the other end of the direct current conversion circuit 30 being electrically connected to a direct current power supply or a direct current load;

[0038] an alternating current and direct current conversion circuit 40 configured to convert a voltage of an alternating current and a direct current, one end of the alternating current and direct current conversion circuit 40 being electrically connected to the battery 200, and the other end of the alternating current and direct current conversion circuit 40 being electrically connected to an external load or an external alternating current power supply;

[0039] a control circuit 50 configured to control the functional circuits of the energy storage device 1000, the control circuit 50 being electrically connected to the switching circuit 20, the direct current conversion circuit 30 and the alternating current and direct current conversion circuit 40.

[0040] The battery 200 can be configured to store electric energy. For example, the battery 200 can comprise a plurality of battery cells, the battery cells being configured to store electric energy, and the energy storage device 1000 being configured to charge and discharge through the charging and discharging of the plurality of battery cells.

[0041] The functional circuits can be circuits configured to realize various functions (e.g., photovoltaic charging function, alternating current discharging function, etc.) of the energy storage device 1000.

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

[0043] Optionally, the direct current conversion circuit 30 comprises a maximum power point tracking circuit (MPPT circuit), and the direct current power supply comprises a photovoltaic device.

[0044] The control mainboard 100 can be configured to control the energy storage device 1000 in the following manner: Figure 2The other end of the direct current conversion circuit 30 is electrically connected with an external direct current power supply or a direct current load. The direct current conversion circuit 30 can be a unidirectional DC / DC circuit or a bidirectional DC / DC circuit, and the DC / DC circuit can convert the voltage of the current. The direct current conversion circuit 30 comprises an MPPT circuit. For example, based on the DC / DC circuit, the voltage inputted by the photovoltaic device to the battery 200 can be converted into a preset voltage matched with the voltage of the battery 200 by the MPPT circuit.

[0045] The other end of the alternating current conversion circuit 40 is electrically connected with an external load or an external alternating current power supply. The alternating current conversion circuit 40 can be an inverter, and can be a unidirectional or bidirectional DC / AC circuit, which is used for conversion between alternating current and direct current. For example, based on the DC / AC circuit, the direct current outputted by the battery 200 can be converted into alternating current for use by the alternating current load.

[0046] Please refer to Figure 2 and Figure 3 The alternating current conversion circuit 40 can comprise a direct current conversion sub-circuit and an alternating current conversion sub-circuit. The direct current conversion circuit 30 is used for converting the voltage of the current, and the alternating current conversion sub-circuit is used for realizing conversion between alternating current and direct current.

[0047] The control circuit 50 can be used for controlling each functional circuit to realize each function of the energy storage device 1000. For example, the direct current conversion circuit 30 and the alternating current conversion circuit 40 are respectively provided with corresponding switching elements (such as relays), and the control circuit 50 can control the closing and opening of the corresponding switching elements to realize the control of the direct current conversion circuit 30 and the alternating current conversion circuit 40.

[0048] Optionally, the alternating current conversion circuit 40 is electrically connected with the battery 200 through the switching circuit 20.

[0049] The other end of the alternating current conversion circuit 40 is electrically connected with an external load or an external alternating current power supply. The other end of the alternating current conversion circuit 40 can be directly electrically connected with the battery 200 (for example, Figure 2 ); or the other end is electrically connected with the switching circuit 20, and is electrically connected with the battery 200 through the switching circuit 20 (for example, 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 another example, the battery 200 state or the battery 200 working condition of the battery 200 can also be determined based on the electrical parameter. For example, in the case that the electrical parameter (for example, the current) of the battery 200 is detected to be less than the preset working current, it can be considered that the remaining power of the battery 200 is low and needs to be charged. The AC-DC conversion circuit 40 can be controlled to 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 further comprises a peripheral control circuit 70, and the peripheral control circuit 70 is connected to the peripheral device of the energy storage device 1000.

[0056] Alternatively, the energy storage device 1000 further comprises a display mainboard, the display mainboard is connected to the peripheral device, and the control mainboard 100 is in communication connection with the display mainboard.

[0057] The peripheral device can include a universal serial bus (USB), a universal serial bus type-C (TYPE-C) interface, a vehicle charging interface, a light emitting diode (LED) and a display screen of the energy storage device 1000, etc.

[0058] The functional circuit can further comprise a peripheral control circuit 70, one end of the peripheral control circuit 70 is electrically connected to the control circuit 50, and the other end is electrically connected to the peripheral device. For example, taking the case that the peripheral device includes a USB interface as an example, the control circuit 50 can be turned on through the peripheral control circuit 70 to realize the output of the USB interface, etc.

[0059] Alternatively, the energy storage device 1000 further comprises a display mainboard, the display mainboard is connected to the peripheral device (display screen), and the control mainboard 100 is in communication connection with the display mainboard. For example, the control mainboard 100 can transmit the working condition (for example, the charging working condition, the power-on working condition, etc.) of the battery 200, the state (for example, the remaining power of the battery 200, etc.) of the battery 200 and the electrical parameter to the display mainboard based on the communication connection with the display mainboard, and then display on the display screen through the connection between the display mainboard and the display screen.

[0060] Specifically, the energy storage device 1000 includes the battery 200 and a control mainboard 100, the control mainboard 100 includes a plurality of functional circuits arranged on the same circuit substrate, and the energy storage device 1000 can realize various functions (for example, charging and discharging functions, etc.) of the energy storage device 1000 based on the turn-on and / or turn-off of the functional circuits. The functional circuits include a switching circuit 20, a direct current conversion circuit 30, an alternating current-direct current conversion circuit 40, and a control circuit 50, the control circuit 50 is electrically connected with the switching circuit 20, the direct current conversion circuit 30, and the alternating current-direct current conversion circuit 40, and the control circuit 50 can directly control the turn-on or turn-off of the switching circuit 20, the direct current conversion circuit 30, and the alternating current-direct current conversion circuit 40 to realize the functional control of the various functional circuits in the energy storage device 1000.

[0061] In the current energy storage device 1000, an inverter system, a maximum power point tracking (MPPT) photovoltaic system, and a battery 200 management system (BMS) are usually respectively provided with a controller, and a host controller is further provided to communicate and schedule control with the three controllers based on UART signals (or CAN signals). The three controllers need to independently complete the corresponding scheduling and control (for example, charging and discharging management, fault detection, etc.), and after completing the corresponding scheduling and control, respectively communicate with the host controller to share data and coordinate the control of the energy storage device 1000. For example, in the case of receiving a control instruction (taking viewing battery 200 information as an example), the host controller communicates with the controller of the BMS system based on the UART signal, the controller of the BMS system obtains the information, and then sends the battery 200 information to the host controller based on the UART signal, and the host controller receives the battery 200 information and then makes a corresponding response. Therefore, under the control framework of one host controller and three independent controllers, the response rate of the energy storage device 1000 is limited by the communication rate of the host controller and the three controllers; and multiple independent controllers are prone to insufficient coordination, further affecting the response efficiency of the energy storage device 1000.

[0062] The control mainboard 100 of the energy storage device 1000 of the present application controls the turn-on and / or turn-off of the functional circuits that can realize various functions of the energy storage device 1000 based on the control circuit 50, so that the energy storage device 1000 can realize various functions, simplify the control system of the energy storage device 1000, and make the control mode of the energy storage device 1000 more simple and efficient.

[0063] For example, please refer again to Figure 2 and Figure 3, through the control of the control circuit 50 of each functional circuit, the effect of controlling the MPPT system (for example, controlling the DC conversion circuit 30), the BMS system (for example, controlling the switching circuit 20, the detection circuit 60, etc.), and the inverter system (for example, controlling the AC / DC conversion circuit 40) can be achieved. The control circuit 50 also has the control function of controlling other peripherals (such as USB, TYPE-C interface, vehicle charging, and LED control of the energy storage device 1000, etc.).

[0064] In other words, by integrating the control of each functional circuit of the energy storage device 1000 into the control circuit 50, the control circuit 50 is arranged on the control mainboard 100, and the scheduling of different functional circuits can be realized based on the control circuit 50 on the same control mainboard 100. The internal data of the control mainboard 100 can be shared between the functional circuits to realize data sharing between the functional circuits. Each functional circuit no longer needs to communicate based on UART signals (or CAN signals) and then perform subsequent scheduling control, which can reduce the data transmission delay between the functional circuits, simplify the communication link of the energy storage device 1000, improve the response efficiency of the energy storage device 1000, optimize the cooperative work of the functional circuits corresponding to multiple functions in the energy storage device 1000, and improve the management efficiency and safety of the energy storage system.

[0065] In addition, after integrating the controllers of multiple functional circuits into the control circuit 50 and arranging them on the control mainboard 100, the volume occupied by the control mainboard 100 is smaller, which can also simplify the system volume 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 refer to Figure 4 In some embodiments, the control circuit 50 includes a controller 51, and the controller 51 includes a plurality of functional control modules, and the plurality of functional control modules respectively control the plurality of functional circuits.

[0067] The control circuit 50 includes a controller 51, and the controller 51 can include a digital signal processing chip (Digital Signal Processor, DSP), a microcontroller unit (Microcontroller Unit, MCU), etc. For convenience of description, as shown in Figure 1 In other words, as shown in

[0068] Optionally, the control mainboard 100 can be used to run an energy storage management system, which includes a plurality of function control modules. The energy storage management system can be a system based on algorithms and data processing, etc., to control various functional components of the energy storage device 1000, to realize various functions of the energy storage device 1000 (for example, detecting battery information of the energy storage device 1000, etc.). For example, please refer to Figure 5 The control mainboard 100 can run an 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 module can be a virtual module, and each function control module realizes a specific function based on the function circuit of the control mainboard 100.

[0069] Among them, a plurality of function control modules control a plurality of function circuits respectively. For example, a plurality of function control modules control each function circuit one by one (for example, please refer to Figure 4 The MPPT function control module 511 on the controller 51 is used to control the direct current 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 switching circuit 20, realize the connection with the external load 21, the AC / DC load 22, and the connection with the external photovoltaic device 401, the connection with the external AC power supply 301, etc.); For another example, one function control module can control a plurality of function circuits; For another example, a plurality of function control modules can control the same function circuit, etc.

[0070] Optionally, a plurality of function control modules are combined into one controller through a sealing process, and the plurality of function control modules are independent of each other.

[0071] Among them, the sealing process chip is a kind of customized chip that encapsulates a plurality of chips or different functional electronic modules together to form a system or subsystem. A plurality of function control modules can be combined into one controller based on the sealing process, and each function control module is independent of each other in the controller.

[0072] Please refer to Figure 6 Optionally, the plurality of function control modules include a battery management module and a fault diagnosis module, and the battery management module is used to obtain the information of the battery 200 to monitor the energy storage device 1000.

[0073] For example, in the case that the battery 200 includes a plurality of battery cells, the battery management module can be used to acquire the voltage and current of each battery cell to monitor the total voltage and total current of the energy storage device 1000; for another example, the battery management module can also be used to monitor the temperature of the energy storage device 1000; for another example, the battery management module can also be used to acquire the information of each battery cell of the energy storage device 1000 to monitor the state (e.g., State of Charge (SOC), State of Health (SOH), State of Energy (SOE), and Remaining Useful Life (RUL), etc.) of the energy storage device 1000; for another example, 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 the battery 200 has an abnormality by detecting the information (e.g., electrical parameters, etc.) of the battery 200 (for example, including a plurality of battery cells) acquired by the detection circuit 60. For example, in the case that the battery 200 includes a plurality of battery cells, the fault diagnosis module can determine whether the battery cell has a temperature fault based on the temperature of each battery cell of the energy storage device 1000 by comparing the temperature of the battery cell with a preset temperature threshold.

[0074] Referring to Figure 6 Optionally, the plurality of function control modules include a charging control module and a discharging control module, and the charging control module and the discharging control module are used to control the energy storage device 1000 to perform a power-on operation in the case that the battery 200 has no abnormality, and the power-on operation includes controlling the switch circuit 20 to be turned on.

[0075] Specifically, in the current host controller and three-controller energy storage device 1000, in the case of powering on the energy storage device 1000, the host controller generally issues a monitoring instruction to the controller of the BMS system, the controller of the BMS system receives the monitoring instruction through the UART signal, and then acquires the information of the battery cell and performs fault detection on the battery cell. If the fault detection has no abnormality, the controller of the BMS system reports the information of the battery cell and the signal that the battery cell has no abnormality to the host controller through the UART signal, and the host controller acquires the information and the signal, and then issues a power-on instruction to the controller of the BMS system through the UART signal. The controller of the BMS system controls the power-on in the case of receiving the power-on instruction, and sends a power-on completion signal to the host controller through the UART signal after the power-on is completed.

[0076] The control mainboard 100 provided with multiple function control modules, including a charging control module and a discharging control module, in the case of powering up the energy storage device 1000, no communication between the controllers is needed, only in the case of determining that the energy storage device 1000 has no fault by the fault diagnosis module, the charging control module and the discharging control module of the control mainboard 100 cooperate to perform the power-up operation, that is, by controlling the switch circuit 20 to turn on to complete the power-up.

[0077] Optionally, the switch circuit 20 includes a charging circuit and a discharging circuit, the energy storage device 1000 includes a bus capacitor and a pre-charge switch tube, the charging control module is used to control the pre-charge switch tube and the charging circuit to turn on to charge the bus unit.

[0078] The discharging control module is used to control the discharging circuit to turn on to complete the power-up operation in the case that the voltage of the bus unit is greater than the threshold voltage of the energy storage device 1000.

[0079] Wherein, please refer to Figure 7 The switch tube of the energy storage device 1000 includes a metal-oxide-semiconductor field-effect transistor (MOS tube), the pre-charge switch tube includes a pre-charge MOS tube, the charging circuit includes a charging MOS tube, and the discharging circuit includes a discharging MOS tube.

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

[0081] Specifically, please refer to Figure 3 、 Figure 6 and Figure 7 In the case of determining that the energy storage device 1000 has no fault by the fault diagnosis module based on the electrical parameters obtained by the detection circuit 60, the energy storage device 1000 can first control the pre-charge switch tube and the charging circuit (pre-charge MOS tube and charging MOS tube) to close by the charging control module to pre-charge the bus unit (for example, the bus capacitor) to avoid the current impact on each device inside the energy storage device 1000, and then control the discharging circuit (discharging MOS tube) to close by the discharging control module to realize the accurate control of the current inside the energy storage device 1000 in the case that the voltage of the bus capacitor is greater than the threshold voltage of the energy storage device 1000.

[0082] Optionally, the function control module further comprises a communication management module, and the communication management module is configured to communicate with the display mainboard to control the peripheral device (the display screen) to display the information of the energy storage device 1000 when the energy storage device 1000 is powered on.

[0083] Specifically, the energy storage device 1000 further comprises a display screen, and the display screen can be used to display the information of the energy storage device 1000, for example, the display screen can display the remaining power of the energy storage device 1000. The function control module further comprises a communication management module, and the main control board 100 can communicate with the display mainboard based on the communication management module to control the peripheral device (the display screen) to display the information that the energy storage device 1000 is powered on and the energy storage information (for example, the remaining power) of the energy storage device 1000 when the energy storage device 1000 is powered on.

[0084] In some embodiments, the discharge control module is configured to control the energy storage device 1000 to discharge through the direct-current conversion circuit 30 or the alternating-current / direct-current conversion circuit 40 based on the control circuit 50 when each battery cell is normal.

[0085] Specifically, in the energy storage device 1000 with the host controller and the three controllers, when the energy storage device 1000 is discharged, the host controller and the controller of the BMS system generally communicate to power on the energy storage device 1000. After the energy storage device 1000 is powered on, the host controller communicates with the controller of the inverter system based on the UART signal, and the controller of the inverter system requests the battery 200 information (for example, by communicating with the host controller, forwarding the communication between the host controller and the controller of the BMS system to obtain the battery 200 information; for example, the controller of the inverter system and the controller of the BMS system can also directly communicate through the UART signal to obtain the battery 200 information) when receiving the discharge instruction in the communication signal. The controller of the inverter system continuously adjusts and controls the inverter output power based on the continuously obtained battery 200 information, so that the energy storage device 1000 can be discharged at a power less than the maximum load capacity of the energy storage device 1000. During the discharging process, the control process is complex, and the repeated communication can cause the power adjustment to be not timely, thereby causing the risk of damage to the energy storage device 1000.

[0086] Please refer to Figure 6 The control mainboard 100 of the present application is provided with a plurality of function control modules, and the function control module comprises a discharge control module. When the energy storage device 1000 is powered on and the fault diagnosis module determines that there is no fault in the energy storage device 1000, the battery 200 (each battery cell) is discharged by the discharge control module without communication between the modules, or the battery 200 and the inverter are cooperated to complete the discharging by the discharge control module.

[0087] It can be understood that, in the case of discharging the energy storage device 1000, the battery management module of the function control module can also control the discharging control module to discharge.

[0088] Optionally, the function control module further comprises an energy management module, the energy management module being configured to obtain a preset discharging power of the energy storage device 1000, and the discharging control module being configured to control the energy storage device 1000 to discharge or control the energy storage device 1000 and the inverter to discharge by controlling, based on the preset discharging power, a duty cycle of the AC-DC conversion circuit 40 and / or the DC conversion circuit 30 in the case where each battery cell is normal.

[0089] The energy management module can be a module for managing input energy (for example, photovoltaic input energy input through connection of the DC conversion circuit 30 and the photovoltaic device, and AC input energy input through connection of the AC-DC conversion circuit 40 and the AC power supply, etc.), output energy (for example, AC output energy output through connection of the AC-DC conversion circuit 40 and the load, interface (such as USB, TYPE-C interface) output energy, etc.) of the energy storage device 1000. Figure 6 For example, the energy management module can manage the maximum charging power and the maximum discharging power of the energy storage device 1000; for 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 discharging power can be the maximum discharging power or the real-time discharging power of the energy storage device 1000 when discharging AC.

[0091] Specifically, in the case of discharging the energy storage device 1000 (for example, the mainboard 100 obtains a power-on instruction), the maximum discharging power of the energy storage device 1000 when discharging AC can be determined by the energy management module, and then the discharging power of the inverter can be controlled based on the maximum discharging power by the discharging control module, so as to realize real-time response, real-time adjustment and improve the response rate of the energy storage device 1000 when the energy storage device 1000 is discharging.

[0092] In some embodiments, the energy storage device 1000 further comprises an AC charging and discharging interface, one end of the AC-DC conversion circuit 40 is electrically connected with the AC-DC charging interface, and the other end is electrically connected with the battery 200 of the energy storage device 1000, and the function control module further comprises a charging control module, the charging control module being configured to control the AC-DC conversion circuit 40 to charge the energy storage device 1000 in the case of receiving an AC charging instruction.

[0093] The AC charging interface is configured to be connected with an external AC power supply (for example, a mains power supply, etc.).

[0094] Specifically, in the current host controller and three controller energy storage device 1000, in the case of charging the energy storage device 1000, generally by the host controller and the controller of the BMS system to communicate, to power on the energy storage device 1000. After the energy storage device 1000 is powered on, the host controller is communicated with the controller of the inverter system based on the UART signal, and the controller of the inverter system requests the battery 200 information (for example, by communicating with the host controller, through the forwarding communication between the host controller and the controller of the BMS system to obtain the battery 200 information; for example, the controller of the inverter system and the controller of the BMS system can also directly communicate through the UART signal to obtain the battery 200 information) when receiving the charging instruction in the communication signal, and the controller of the inverter system continuously adjusts and controls the input power (charging power) of the inverter based on the continuously obtained battery 200 information, to charge the energy storage device 1000.

[0095] And the energy storage device 1000 of the application also includes an alternating current charging and discharging interface, one end of the AC / DC conversion circuit 40 is electrically connected with the AC / DC charging interface, and the other end is electrically connected with the battery 200 of the energy storage device 1000. For example, taking the city power as an example. The AC power of the city power enters the energy storage device 1000 through the AC charging and discharging interface, and the AC / DC conversion circuit 40 can convert the AC power into DC power and output the DC power from the AC / DC conversion circuit 40 to the battery 200 of the energy storage device 1000 to store energy for the battery 200 and complete the charging. The function control module also includes a charging control module, which can charge the energy storage device 1000 by controlling the AC / DC conversion circuit 40 after determining that the energy storage device 1000 is powered on and receiving an AC charging instruction.

[0096] Optionally, the function control module further includes an energy management module, and the energy management module is configured to obtain a preset charging power of the energy storage device 1000. The charging control module is configured to control the AC / DC conversion circuit 40 to charge the energy storage device 1000 when receiving an AC charging instruction.

[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, in the case of powering on the energy storage device 1000, if an AC charging instruction is received, the real-time charging power (or the maximum charging power, etc.) of the energy storage device 1000 during charging can be obtained in real time through the energy management module, and then the duty cycle of the AC / DC conversion circuit 40 is controlled through the discharging control module, so that the energy storage device 1000 is charged with the corresponding charging power.

[0099] In some embodiments, the energy storage device 1000 further comprises a photovoltaic charging interface connected to a photovoltaic device, and the function control module further comprises a charging control module configured to control the switch-on of the DC conversion circuit 30 to charge the energy storage device 1000 upon receiving a photovoltaic charging instruction.

[0100] Specifically, in the current host controller and the three-controller energy storage device 1000, when the energy storage device 1000 is charging, the host controller and the controller of the BMS system generally communicate to power on the energy storage device 1000. After the energy storage device 1000 is powered on, the host controller communicates with the controller of the photovoltaic system based on the UART signal, and the controller of the photovoltaic system requests the battery 200 information (for example, by communicating with the host controller, the host controller forwards the communication between the controller of the BMS system to obtain the battery 200 information; for example, the controller of the inverter system and the controller of the BMS system can also directly communicate through the UART signal to obtain the battery 200 information) upon receiving the charging instruction in the communication signal, and the controller of the photovoltaic system continuously adjusts and controls the photovoltaic input power (photovoltaic charging power) based on the continuously obtained battery 200 information and the real-time calculation of the photovoltaic charging power of the controller of the photovoltaic system, to charge the energy storage device 1000.

[0101] The energy storage device 1000 of the present application further comprises a photovoltaic charging interface, one end of the DC conversion circuit 30 is connected to the photovoltaic charging interface, and the other end is connected to the switch circuit 20. The electrical energy of the photovoltaic device can be transmitted to the DC conversion circuit 30 through the photovoltaic charging interface, and then transmitted to the battery 200 of the energy storage device 1000 through the switch circuit 20, to charge the battery 200 of the energy storage device 1000. The function control module further comprises a charging control module, and when the energy storage device 1000 is powered on, if a charging instruction is received, the charging control module is used to charge the energy storage device 1000.

[0102] Optionally, the function control module further comprises an energy management module configured to determine the real-time charging power of the energy storage device 1000 based on a preset photovoltaic charging algorithm, and the charging control module is configured to charge the energy storage device 1000 based on the real-time charging power upon receiving a photovoltaic charging instruction.

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

[0104] Specifically, in the case of the completion of the power-on of the energy storage device 1000, if the photovoltaic charging instruction is received, the charging power at this time can be determined by the energy management module based on the photovoltaic charging power calculated by the MPPT in real time, and then the photovoltaic charging interface can be controlled by the charging control module to charge the battery 200 of the energy storage device 1000.

[0105] Optionally, the function control module further comprises an interface module, and the interface module is configured to receive the control instruction.

[0106] Specifically, the function control module further comprises an interface module, and the interface module can be connected with user keys (for example, power-on keys, charging keys and discharging keys of the energy storage device 1000, etc.) to receive the control instruction; for example, the interface module can also be connected with a display screen to receive the control instruction issued by the user through the display screen.

[0107] Optionally, the communication module is configured to manage the communication of the energy storage device 1000. For example, based on the communication module, the control instruction from a terminal, a server, etc. connected with the energy storage device 1000 can be received.

[0108] Optionally, the fault diagnosis module can also be configured to diagnose each function circuit (for example, the AC-DC conversion circuit 40, the switching circuit 20 and the DC conversion circuit 30, etc.).

[0109] Please refer to Figure 1 The energy storage device 1000 of the embodiments of the present application comprises the control mainboard 100 of the energy storage device 1000 described in any of the above embodiments, which will not be described herein again for the sake of brevity.

[0110] In the description of the present specification, the description of the terms "certain embodiments", "in one example", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the different embodiments or examples described in the present specification and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0111] Any processes or methods described in the flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code which include one or more executable instructions for implementing specific logic functions (or steps) of the process, and / or that the various processes described herein can be understood as representing executable instructions, code segments, or portions of code which include one or more steps for implementing the functions (or steps) of the processes, and that the various processes described herein can be implemented with or without the use of hardware, software, firmware, or any combination thereof.

[0112] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above-described embodiments are exemplary only, and that changes, modifications, substitutions and variations can be made therein without departing from the scope of the application.

Claims

1. A control main board of an energy storage device, characterized by, The control mainboard comprises a plurality of functional circuits arranged on the same circuit substrate, and the functional circuits comprise: a switching circuit connected to a battery of the energy storage device, and configured to turn on or turn off the electrical connection between the battery and an external device; a direct current conversion circuit configured to convert the voltage of direct current, and electrically connected to one end of the switching circuit and the other end of the direct current power supply or the direct current load; an alternating current-direct current conversion circuit configured to convert alternating current and direct current, and electrically connected to one end of the battery and the other end of the external load or the external alternating current power supply; a control circuit configured to control the functions of each of the functional circuits in the energy storage device, and connected to the switching circuit, the direct current conversion circuit and the alternating current-direct current conversion circuit, and comprising a controller comprising a plurality of functional control modules, wherein the plurality of functional control modules are configured to control the plurality of functional circuits respectively, and the plurality of functional control modules comprise a charging control module and a discharging control module, and the charging control module and the discharging control module are configured to control the energy storage device to perform a power-on operation in the case that the battery is normal, and the power-on operation comprises controlling the switching circuit to turn on.

2. The control main board of the energy storage device according to claim 1, characterized in that, The alternating current-direct current conversion circuit is electrically connected to the battery through the switching circuit.

3. The control main board of the energy storage device according to claim 1, characterized in that, The control circuit is configured to control the switching on or switching off of the alternating current-direct current conversion circuit.

4. The control main board of the energy storage device according to claim 1, characterized in that, The functional circuit further comprises a detection circuit configured to detect an electrical parameter flowing out of or flowing into the battery, and based on the electrical parameter, the control circuit controls at least one of the switching circuit and the alternating current-direct current conversion circuit to turn on or turn off the electrical connection between the battery and the external device.

5. The control main board of the energy storage device according to claim 1, characterized in that, The plurality of functional control modules are combined into one controller through a sealing process, and the plurality of functional control modules are independent of each other.

6. The control main board of the energy storage device according to claim 1, characterized in that, The switching circuit comprises a charging circuit and a discharging circuit, the energy storage device comprises a bus unit and a pre-charge switch tube, the charging control module is configured to control the pre-charge switch tube and the charging circuit to turn on to charge the bus unit; The discharging control module is configured to control the discharging circuit to turn on to complete the power-on operation in the case that the voltage of the bus unit is greater than the threshold voltage of the energy storage device.

7. The control main board of the energy storage device according to claim 1, characterized in that, The functional circuit further comprises a peripheral control circuit connected to a peripheral device of the energy storage device. Alternatively, the energy storage device further comprises a display mainboard connected to the peripheral device, and the control mainboard is in communication connection with the display mainboard.

8. The control main board of the energy storage device according to claim 1, characterized in that, The direct current conversion circuit comprises a maximum power point tracking circuit, and the direct current power supply comprises a photovoltaic device.

9. An energy storage device, characterized by, The energy storage device comprises a battery and the control mainboard of the energy storage device according to any one of claims 1-8.

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