Energy storage system

Abstract

The utility model provides an energy storage system which comprises a battery management circuit board, a first controller and a power supply module are arranged on the battery management circuit board, the power supply module is electrically connected with the first controller, and the battery management circuit board further comprises a board-to-board connector; the function board comprises a function module, and the function board is electrically connected with the battery management circuit board through a board-to-board connector; wherein the power supply module supplies power to the functional board through the board-to-board connector, and the functional module is in communication connection with the first controller through the board-to-board connector; wherein the battery management circuit board comprises a first side and a second side, the function board is arranged towards the first side of the battery management circuit board, and the function board and the battery management circuit board are arranged in a stacked mode in the direction from the second side of the battery management circuit board to the first side. The function board and the battery management circuit board are stacked up and down, so that the occupation of the system space can be reduced, and the utilization rate of the system space is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage system technology, and more specifically, to an energy storage system. Background Technology

[0002] In related technologies, battery energy storage systems require different functions in different scenarios, such as cell capacity balancing, operational data recording, and remote querying. These functions require the computing power of a processor, thus necessitating their integration onto a single main control board. These additional functions introduce additional electrical components, resulting in a large and expensive main control board. However, these functions are not required in all scenarios, leading to low system space utilization. Utility Model Content

[0003] This application aims to at least address the technical problem of low system space utilization caused by additional functions of energy storage systems in existing or related technologies.

[0004] Therefore, this application proposes an energy storage system.

[0005] In view of this, this application provides an energy storage system, including: a battery management circuit board, on which a first controller and a power supply module are disposed, the power supply module being electrically connected to the first controller, and the battery management circuit board further including a board-to-board connector; a function board, the function board including a function module, the function board being electrically connected to the battery management circuit board via the board-to-board connector; wherein, the power supply module supplies power to the function board via the board-to-board connector, and the function module is communicatively connected to the first controller via the board-to-board connector; wherein, the battery management circuit board includes a first side and a second side, the function board is disposed facing the first side of the battery management circuit board, and the function board and the battery management circuit board are stacked in the direction from the second side of the battery management circuit board to the first side.

[0006] This application reduces costs and achieves a low-cost integrated system solution by designing a separate functional board that shares the MCU with the battery management circuit board. Furthermore, the functional board and battery management circuit board are stacked vertically, which reduces the space occupied by the boards and improves system space utilization.

[0007] In some technical solutions of this application, the functional board may optionally include at least one of a current limiting module circuit board, an active balancing module circuit board, and a monitoring module circuit board.

[0008] This application enables the rapid assembly of energy storage systems with different structures based on actual needs by setting up different functional boards, thereby improving the versatility and scalability of the energy storage system.

[0009] Optionally, in some technical solutions of this application, the energy storage system further includes: a fixed bracket, the first end of which is connected to the battery management circuit board, the second end of which is connected to the functional board, and the functional board and the battery management circuit board are stacked together through the fixed bracket.

[0010] This application connects the battery management circuit board and the function board by setting a fixed bracket. While meeting the requirements for the stacking of the battery management circuit board and the function board brackets, it improves the robustness and reliability of the connection between the battery management circuit board and the function board. This enables the system to reliably cope with vibrations that may occur during transportation, installation and use, thereby improving the reliability and stability of the energy storage system.

[0011] Optionally, in some technical solutions of this application, the functional board includes a current limiting module circuit board, the functional module includes a current limiting circuit, and the energy storage system further includes: an energy storage battery, the charging input terminal of the energy storage battery being electrically connected to the current limiting circuit; an energy storage inverter, the energy storage inverter being electrically connected to the discharge output terminal of the energy storage battery and the current limiting circuit; the battery management circuit board further includes a current limiting detection module, the current limiting detection module being used to detect the parameter information of the energy storage battery; wherein, when the parameter information meets preset conditions, the first controller sends a current limiting signal to the current limiting circuit to control the current limiting circuit to limit the charging current value of the energy storage battery.

[0012] This application enables the limitation of the charging current of the energy storage battery by setting up an independent current limiting module circuit board, thereby effectively extending the battery life of the energy storage battery.

[0013] In some technical solutions of this application, the current limiting circuit includes: a resistor, the first end of which is electrically connected to the energy storage battery; an inductor, the first end of which is electrically connected to the second end of the resistor; a switching transistor, the first end of which is electrically connected to the second end of the inductor, and the second end of which is electrically connected to the energy storage inverter; and a switching drive module, which is electrically connected to the control terminal of the switching transistor. The switching drive module is used to receive a current limiting signal and control the switching transistor to operate according to the current limiting signal, so as to limit the charging current value of the energy storage battery.

[0014] This application implements a current limiting circuit using a BUCK converter, which has good current limiting effect, low cost, and good compatibility and reliability.

[0015] Optionally, in some technical solutions of this application, the battery management circuit board may further include a current detection module, which is communicatively connected to the first controller and is used to detect the current value of the current limiting circuit.

[0016] This application achieves closed-loop control of the current limiting module circuit board by setting a current detection module to detect whether the current value after current limiting matches the set target current, thereby improving the current limiting effect.

[0017] Optionally, in some technical solutions of this application, the energy storage system further includes an energy storage battery, which includes multiple cells; the functional board further includes an active balancing module circuit board, which includes a balancing module and a second controller, the second controller being communicatively connected to the first controller and the balancing module; the battery management circuit board further includes an analog front-end module, which is communicatively connected to the first controller, for collecting the cell voltage of the cells and determining the voltage difference among multiple cells; and, when the voltage difference is greater than a voltage difference threshold, the first controller sends a balancing signal to the second controller so that the second controller controls the balancing module to start the active balancing mode.

[0018] This application sets up an active balancing module circuit board to actively balance the charge of multiple cells, which can reduce the voltage difference between different cells and improve the energy utilization rate of the energy storage battery.

[0019] In some technical solutions of this application, the equalization module may optionally include: a switching matrix, an isolated DC-DC power supply, and / or an energy storage device.

[0020] Optionally, in some technical solutions of this application, the active balancing module circuit board may further include: a balancing power supply module, which is electrically connected to the power supply module, the balancing module, and the second controller; wherein the power supply module provides power to the balancing power supply module, and the balancing power supply module supplies power to the balancing module and the second controller.

[0021] This application enables the provision of power supply signals of different voltages to the second controller and the equalization module by setting an independent equalization power supply module on the active equalization circuit board.

[0022] Optionally, in some technical solutions of this application, the functional board may also include a monitoring module circuit board, the functional module including a communication interface; the first controller is also used to collect the operating information of the energy storage system and send the operating information to the communication interface; the communication interface is used to send the operating information to the target terminal; or, to receive control commands sent by the target terminal and send the control commands to the first controller.

[0023] This application enables remote viewing and monitoring of the operation information of the energy storage system, as well as remote sending of control commands to the energy storage system, through the monitoring module circuit board, thereby realizing remote control of the energy storage system.

[0024] In some technical solutions of this application, the communication interface may optionally include: a Wi-Fi communication interface, a Bluetooth communication interface, an Ethernet communication interface, and / or a cellular network communication interface.

[0025] Optionally, in some technical solutions of this application, the monitoring module circuit board may further include: a monitoring power supply module, which is electrically connected to the communication interface of the power supply module; wherein the power supply module provides power to the monitoring power supply module, and the monitoring power supply module is used to supply power to the communication interface.

[0026] In this technical solution, a monitoring power supply module is installed on the monitoring module circuit board. After the monitoring module circuit board and the battery management circuit board are connected via a board-to-board connector, the monitoring power supply module is electrically connected to the power supply module. At this time, the power supply module outputs electrical energy to the power supply module. Upon receiving the electrical energy from the power supply module, the power supply module uses the received electrical energy to power the communication interface. Attached Figure Description

[0027] 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, in which:

[0028] Figure 1A The present application shows schematic diagrams of the structure of energy storage systems according to some embodiments;

[0029] Figure 1B The present application shows schematic diagrams of the structure of energy storage systems according to some embodiments;

[0030] Figure 2 Structural block diagrams of energy storage systems according to some embodiments of this application are shown;

[0031] Figure 3 Structural block diagrams of energy storage systems according to some embodiments of this application are shown;

[0032] Figure 4 A structural block diagram of a current limiting module circuit board according to some embodiments of this application is shown.

[0033] Figure label:

[0034] 10 energy storage systems, 12 energy storage batteries, 122 battery cells, 14 energy storage inverters;

[0035] 102 Battery management circuit board, 1021 First controller, 1022 Power supply module, 1023 Board-to-board connector, 1024 First side, 1025 Second side, 1026 Current limiting detection module, 1027 Current detection module, 1028 Analog front-end module;

[0036] 104 function board, 1042 function module;

[0037] 106 current limiting module circuit board, 1062 current limiting circuit, 1064 switch driver module, R resistor, L inductor, M switch transistor;

[0038] 108 Active Equalization Module Circuit Board, 1082 Equalization Module, 1084 Second Controller, 1086 Equalization Power Supply Module;

[0039] 110 Monitoring module circuit board, 112 Communication interface, 114 Monitoring power supply module, 116 Fixing bracket. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0042] The following reference Figures 1A to 4 This application describes an energy storage system according to some embodiments.

[0043] In some embodiments of this application, an energy storage system is provided. Figure 1A The present application shows schematic diagrams of the structure of energy storage systems according to some embodiments. Figure 2 and Figure 3 Structural block diagrams of energy storage systems according to some embodiments of this application are shown, such as... Figure 1A , Figure 2 and Figure 3 As shown, the energy storage system 10 includes: a battery management circuit board 102, on which a first controller 1021 and a power supply module 1022 are disposed, the power supply module 1022 being electrically connected to the first controller 1021, and the battery management circuit board 102 also including a board-to-board connector 1023; and a function board 104, which includes a function module 1042, the function board 104 being electrically connected to the battery management circuit board 102 via the board-to-board connector 1023; wherein, the power supply module 1042... 22 supplies power to the function board 104 through the board-to-board connector 1023, and the function module 1042 communicates with the first controller 1021 through the board-to-board connector 1023; wherein, the battery management circuit board 102 includes a first side 1024 and a second side 1025, the function board 104 is disposed facing the first side 1024 of the battery management circuit board 102, and the function board 104 and the battery management circuit board 102 are stacked in the direction from the second side 1025 of the battery management circuit board 102 to the first side 1024.

[0044] In this embodiment, the control module of the energy storage system 10 includes a battery management system (BMS) circuit board and a function board 104. The function board 104 is independently designed and connected to the battery management circuit board 102 via board-to-board connectors (BTB). To save space, the function board 104 and the battery management circuit board 102 are installed in a stacked manner, reducing the space occupied by the system.

[0045] Connecting the battery management circuit board 102 and the function board 104 via the board-to-board connector 1023 can reduce the use of internal wiring harnesses, lower the cost of wiring harness connections, and improve connection reliability.

[0046] For example, such as Figure 1A As shown, the first side 1024 of the battery management circuit board 102 is the front, and the second side 1025 of the battery management circuit board 102 is the back. The board-to-board connector 1023 is disposed on the front of the battery management circuit board 102, and the function board 104 is also located on the front of the battery management circuit board 102. The function board 104 and the battery management circuit board 102 are stacked vertically.

[0047] For example, the number of function boards 104 can be one or more. Each function board 104 can add one or more additional functions to the energy storage system 10, such as battery charging current limiting function, cell power balancing function, and operation data acquisition and remote query function.

[0048] A first controller 1021 is provided on the battery management circuit board 102. For example, the first controller 1021 is a microcontroller unit (MCU). The function board 104 communicates with the first controller 1021 through the communication contacts in the board-to-board connector 1023, so that it can share the same MCU with the battery management circuit board 102 to realize its own functions. Therefore, there is no need to set an additional MCU on the function board 104, which can reduce the cost of the function board 104.

[0049] The battery management circuit board 102 is also provided with a power supply module 1022, which can provide power to the function board 104 through the power supply contacts in the board-to-board connector 1023, so that no additional power supply cable needs to be connected to the function board 104, thus reducing the system wiring harness.

[0050] For example, the battery management circuit board 102 manages the charging and discharging of the energy storage battery 12 using a MOS (Metal-Oxide-Semiconductor) transistor or a gallium nitride (GaN) solution. The battery management circuit board 102 can also collect data such as cell voltage and cell temperature through an analog front-end (AFE) chip, enabling data collection from the cell 122. The battery management circuit board 102 has three CAN (Controller Area Network) communication channels, communicating in parallel with the energy storage inverter 14, the power pack, and other integrated battery systems.

[0051] For example, the battery management circuit board 102 has a cell low-temperature heating function and a cell charging and discharging current acquisition function, and provides a low-voltage safety power interface with independent output to realize the charging interface between the low-voltage battery and household low-voltage electrical equipment, thereby realizing the basic charging and discharging functions of the battery management system.

[0052] This application designs an independent function board 104, allowing the function board 104 and the battery management circuit board 102 to share the MCU, thereby reducing costs and achieving a low-cost integrated system solution. Simultaneously, the function board 104 and the battery management circuit board 102 are stacked vertically, which reduces the space occupied by the function board 104 and improves system space utilization.

[0053] In some embodiments of this application, optionally, such as Figure 1A As shown, the functional board 104 includes at least one of a current limiting module circuit board, an active balancing module circuit board, and a monitoring module circuit board.

[0054] In this embodiment, the number of function boards 104 can be one or more, and the function boards 104 may include one or more of the current limiting module circuit board 106, the active balancing module circuit board 108, and the monitoring module circuit board 110.

[0055] The current limiting module circuit board 106 limits the charging current of the energy storage battery 12. The active balancing module circuit board 108 balances the discharge process of different cells 122, thereby bringing the remaining charge of different cells 122 closer to equilibrium. The monitoring module circuit board 110 has an energy management system (EMS). The energy management system can locally store the collected operating information of the energy storage system 10.

[0056] This application enables the quick assembly of energy storage systems 10 with different structures according to actual needs by setting up different functional boards 104, thereby improving the versatility and scalability of the energy storage system 10.

[0057] In some embodiments of this application, optionally, Figure 1B The following are schematic diagrams of the structure of energy storage systems according to some embodiments of this application, such as... Figure 1B As shown, the energy storage system 10 also includes: a fixed bracket 116, the first end of the fixed bracket 116 being connected to the battery management circuit board 102, the second end of the fixed bracket 116 being connected to the function board 104, and the function board 104 and the battery management circuit board 102 being stacked together through the fixed bracket 116.

[0058] In this embodiment of the application, for example, the fixing bracket 116 can be a fixing post, with screw holes at both ends of the fixing post, and the battery management circuit board 102 and the function board 104 are connected to the fixing post by screws.

[0059] For example, the mounting bracket 116 can be disposed on the housing of the energy storage system, and the battery management circuit board 102 and the function board 104 are respectively connected to the mounting bracket 116 on the housing, that is, the battery management circuit board 102 and the function board 104 are stacked through the housing.

[0060] For example, the fixing bracket 116 can also be other independently configured bracket structures. For example, the fixing bracket 116 can be made of engineering plastics, resin, wood, metal, or rubber.

[0061] This application connects the battery management circuit board 102 and the function board 104 by setting a fixed bracket 116. While meeting the requirement of stacking the brackets of the battery management circuit board 102 and the function board 104, it improves the robustness and reliability of the connection between the battery management circuit board 102 and the function board 104, thereby reliably coping with vibrations that may occur during transportation, installation and use, and improving the reliability and stability of the energy storage system.

[0062] In some embodiments of this application, optionally, Figure 4 The following is a structural block diagram of the current limiting module circuit board 106 according to some embodiments of this application, such as... Figure 1A , Figure 2 , Figure 3 and Figure 4As shown, the functional board 104 includes a current limiting module circuit board 106, and the functional module 1042 includes a current limiting circuit 1062. The energy storage system 10 also includes: an energy storage battery 12, the charging input terminal of which is electrically connected to the current limiting circuit 1062; an energy storage inverter 14, which is electrically connected to the discharge output terminal of the energy storage battery 12 and the current limiting circuit 1062; the battery management circuit board 102 also includes a current limiting detection module 1026, which is used to detect the parameter information of the energy storage battery 12; wherein, when the parameter information meets the preset conditions, the first controller 1021 sends a current limiting signal to the current limiting circuit 1062 to control the current limiting circuit 1062 to limit the charging current value of the energy storage battery 12.

[0063] In this embodiment, the functional board 104 includes a current-limiting module circuit board 106. The current-limiting module circuit board 106 can limit the charging current of the energy storage battery 12. Specifically, the energy storage system 10 also includes an energy storage battery 12 and an energy storage inverter 14. The number of energy storage batteries 12 can be multiple. Each energy storage battery 12 includes one or more cells 122. The energy storage battery 12 can store electrical energy. The electrical energy stored in the energy storage battery 12 can come from the power grid or from power generation equipment such as photovoltaic power generation or wind power generation. The energy storage inverter 14 can convert the DC signal released by the energy storage battery 12 into an AC signal and provide it to the load.

[0064] The functional module 1042 on the current limiting module circuit board 106 is the current limiting circuit 1062. The current limiting circuit 1062 can limit the charging current of the energy storage battery 12. Exemplarily, the battery management circuit board 102 provides a dry contact and an IO (Input Output) interface to the current limiting module circuit board 106 to control the current limiting module circuit board 106.

[0065] A current limiting detection module 1026 is provided on the battery management circuit board 102. The current limiting detection module 1026 can identify parameters such as the voltage of the energy storage battery 12 and the capacity of the cell 122, and determine whether it is necessary to limit the charging current of the energy storage battery 12 based on these parameters. For example, when the first controller 1021 determines that the above parameters meet preset conditions, such as the battery voltage being higher than a voltage threshold or the current capacity of the cell 122 exceeding a charging threshold, the first controller 1021 controls the current limiting function to be activated and sends a current limiting signal to the current limiting circuit 1062.

[0066] Upon receiving the current limiting signal, the current limiting circuit 1062 on the current limiting module circuit board 106 activates the current limiting function, limiting the charging current of the energy storage battery 12 according to the target current set by the first controller 1021, so that the actual charging current of the energy storage battery 12 matches the target charging current set by the first controller 1021.

[0067] This application enables the limitation of the charging current of the energy storage battery 12 by setting an independent current limiting module circuit board 106, thereby effectively extending the battery life of the energy storage battery 12.

[0068] In some embodiments of this application, such as Figure 4 As shown, the current limiting circuit 1062 includes: a resistor R, the first end of which is electrically connected to the energy storage battery 12; an inductor L, the first end of which is electrically connected to the second end of the resistor R; a switching transistor M, the first end of which is electrically connected to the second end of the inductor L, and the second end of which is electrically connected to the energy storage inverter 14; and a switch drive module 1064, which is electrically connected to the control terminal of the switching transistor M. The switch drive module 1064 is used to receive a current limiting signal and control the switching transistor M to operate according to the current limiting signal, so as to limit the charging current value of the energy storage battery 12.

[0069] In this embodiment, the current limiting circuit 1062 is specifically a BUCK (step-down converter) transformer. The BUCK transformer can limit the current charging the energy storage battery 12. The battery management circuit board 102 collects the cell voltage of the energy storage battery 12, the PCAK total voltage (the total voltage of all individual cells 122 in the battery pack), and the current charging current of the energy storage battery 12, etc. Based on the above parameters, it determines whether it is necessary to limit the contact current. If the current charging current does not meet the target charging current value set by the battery management circuit board 102, the battery management circuit board 102 controls the BUCK transformer to operate to limit the charging current.

[0070] For example, the current limiting circuit 1062 includes a resistor R, an inductor L, and a switching transistor M, wherein the switching transistor M is a MOSFET switching transistor M. The resistor R, inductor L, and switching transistor M are connected in series between the energy storage inverter 14 and the energy storage battery 12. The switch drive module 1064 is specifically a MOSFET driver circuit board, i.e., a BUCK-IC. The switch drive module 1064 has current control and current monitoring functions. The current control function enables current selection; upon receiving a current selection signal, it controls the charging current value by performing PWM (Pulse Width Modulation) control on the MOSFET. The current monitoring function can collect the current values ​​of the MOSFET and other peripheral circuits in real time and execute a current protection function when the current value exceeds a set threshold.

[0071] After receiving the current limiting signal sent by the first controller 1021, the switch drive module 1064 controls the switch transistor M to work and limits the charging current of the energy storage battery 12.

[0072] For example, such as Figure 3 As shown, a fuse module can also be provided between the energy storage battery 12, the energy storage inverter 14, and the current limiting circuit 1062. For example, an 80A current fuse FUSE1 is provided in the circuit between the energy storage battery 12 and the energy storage inverter 14. A one-way fuse circuit is provided in the circuit between the switch M, the inductor L, and the resistor R, and a diode D1 and a 40A current fuse FUSE2 are provided in the one-way fuse circuit.

[0073] This application implements a current limiting circuit 1062 using a BUCK converter, which has good current limiting effect, low cost, and good compatibility and reliability.

[0074] In some embodiments of this application, optionally, such as Figure 3 As shown, the battery management circuit board 102 also includes a current detection module 1027, which is communicatively connected to the first controller 1021 and is used to detect the current value of the current limiting circuit 1062.

[0075] In this embodiment, a current detection module 1027 is provided on the battery management circuit board 102. The current detection module 1027 can collect the charging current after it has been limited by the current limiting circuit 1062 and determine whether the current limiting module circuit board 106 is operating according to the target current set by the battery management circuit board 102. If the charging current after current limiting does not match the target current, the battery management circuit board 102 further adjusts the operating parameters of the current limiting module circuit board 106 to adjust the current limiting effect.

[0076] This application achieves closed-loop control of the current limiting module circuit board 106 by setting a current detection module 1027 to detect whether the current value after current limiting matches the set target current, thereby improving the current limiting effect.

[0077] In some embodiments of this application, optionally, such as Figure 3 and Figure 4 As shown, the energy storage system 10 also includes an energy storage battery 12, which includes multiple cells 122; the functional board 104 also includes an active balancing module circuit board 108, which includes a balancing module 1082 and a second controller 1084, which is communicatively connected to the first controller 1021 and the balancing module 1082; the battery management circuit board 102 also includes an analog front-end module 1028, which is communicatively connected to the first controller 1021, for collecting the cell voltage of the cells 122 and determining the voltage difference of the multiple cells 122; and, when the voltage difference is greater than the voltage difference threshold, the first controller 1021 sends a balancing signal to the second controller 1084 so that the second controller 1084 controls the balancing module 1082 to start the active balancing mode.

[0078] In this embodiment, the energy storage system 10 includes an energy storage battery 12, wherein there can be multiple energy storage batteries 12. Each energy storage battery 12 includes multiple cells 122; exemplarily, the number of cells 122 is at least two. Because different cells 122 may have different batches, production environments, and usage conditions, their discharge states may differ. These differences in state may lead to differences in remaining capacity and cell voltage among the different cells 122. Due to the "weakest link" effect, when the cell with the smallest remaining capacity falls below the discharge threshold, the entire energy storage battery 12 will be identified as depleted, resulting in a waste of remaining energy.

[0079] The battery management circuit board 102 includes an analog front end (AFE) module 1028. The analog front end module 1028 can acquire the cell voltage of each battery cell 122, thereby determining the voltage difference between different cells 122. Simultaneously, the analog front end module 1028 also has a passive balancing function. When the voltage difference between cells 122 is large, the passive balancing function reduces the voltage difference between different cells 122. However, the passive balancing module 1082 has limited ability to balance the cell charge. When the imbalance between battery cells 122 is significant, the passive balancing module 1082 will not be able to effectively balance the charge of different cells, still resulting in energy waste.

[0080] To address this, functional board 104 includes an active balancing module circuit board 108. The functional module 1042 of the active balancing module circuit board 108 includes a balancing module 1082, which can balance the discharge process of different battery cells 122, thereby bringing the remaining charge of the different battery cells 122 closer to equilibrium. The active balancing module circuit board 108 also includes a second controller 1084, which can control the operation of the balancing module 1082.

[0081] When the analog front-end module 1028 detects that the voltage difference between multiple battery cells 122 exceeds the voltage difference threshold, it activates the active balancing function. At this time, the first controller 1021 sends an enable signal to the second controller 1084 and sends the battery cells 122 that need to be balanced. After receiving the enable signal, the second controller 1084 controls the balancing module 1082 to operate.

[0082] For example, the second controller 1084 will also detect the charging and discharging current of the battery cell 122 that is in the equalization mode, and determine whether the equalization module 1082 is working according to the set equalization mode based on the detection result, so as to ensure that it works according to the upright position of the battery management circuit board 102, thereby realizing the active equalization of the battery cell power.

[0083] For example, the battery management circuit board 102 and the active balancing module circuit board 108 communicate via UART (Universal Asynchronous Receiver / Transmitter), I2C (Inter-Integrated Circuit), SPI (Serial Peripheral Interface), CAN (Controller Area Network), or RS485 (a balanced transmission serial communication protocol).

[0084] This application sets up an active balancing module circuit board 108 to actively balance the power of multiple cells, which can reduce the voltage difference between different cells 122 and improve the energy utilization rate of the energy storage battery 12.

[0085] In some embodiments of this application, the equalization module 1082 optionally includes: a switching matrix, an isolated DC-DC power supply, and / or an energy storage device.

[0086] In this embodiment, the balancing module 1082 includes a switch matrix. The switch matrix includes multiple switching devices, each of which is electrically connected to a battery cell 122. During discharge, the switch matrix can actively shut off the discharge path of the battery cell 122 with lower charge. During charging, the switch matrix can actively shut off the charging path of the battery cell 122 with higher charge. The switch matrix enables active balancing.

[0087] The equalization module 1082 may also include an isolated DC-DC power supply. The second controller 1084 controls the operation of the isolated DC-DC power supply to ensure that it operates according to the instructions of the battery management circuit board 102.

[0088] The equalization module 1082 also includes an energy storage device, which, exemplarily, includes a capacitor.

[0089] In some embodiments of this application, optionally, such as Figure 3 As shown, the active balancing module circuit board 108 also includes: a balancing power module 1086, which is electrically connected to the power supply module 1022, the balancing module 1082, and the second controller 1084; wherein, the power supply module 1022 provides power to the balancing power module 1086, and the balancing power module 1086 is used to supply power to the balancing module 1082 and the second controller 1084.

[0090] In this embodiment, an equalization power module 1086 is provided on the active equalization module circuit board 108. After the active equalization module circuit board 108 and the battery management circuit board 102 are connected via a board-to-board connector 1023, the equalization power module 1086 is electrically connected to the power supply module 1022. At this time, the power supply module 1022 outputs electrical energy to the power supply module. After receiving the electrical energy sent by the power supply module 1022, the power supply module 1022 uses the received electrical energy to supply power to the second controller 1084 and the equalization module 1082.

[0091] For example, the second controller 1084 and the equalization module 1082 require different voltages to operate. Therefore, the equalization power supply module 1086 is provided, which can convert the received electrical energy into one power supply signal suitable for powering the second controller 1084 and another power supply signal suitable for powering the equalization module 1082.

[0092] This application enables the provision of power supply signals of different voltages to the second controller 1084 and the equalization module 1082 by setting an independent equalization power supply module 1086 on the active equalization circuit board.

[0093] In some embodiments of this application, optionally, such as Figure 3 As shown, the functional board 104 also includes a monitoring module circuit board 110, and the functional module 1042 includes a communication interface 112; the first controller 1021 is also used to collect the operating information of the energy storage system 10 and send the operating information to the communication interface 112; the communication interface 112 is used to send the operating information to the target terminal; or, to receive the control command sent by the target terminal and send the control command to the first controller 1021.

[0094] In this embodiment, the functional board 104 includes a monitoring module circuit board 110, which has an Energy Management System (EMS). The Energy Management System can locally store the collected operating information of the energy storage system 10. The functional module 1042 of the monitoring module circuit board 110 is a communication interface 112. Exemplarily, the communication interface 112 has wired communication and wireless communication functions, and can communicate with a target terminal, such as a host computer or a user's mobile phone.

[0095] This application enables remote viewing and monitoring of the operation information of the energy storage system 10 through the monitoring module circuit board 110, as well as remotely sending control commands to the energy storage system 10, thereby realizing remote control of the energy storage system 10.

[0096] In some embodiments of this application, the communication interface 112 may optionally include: a Wi-Fi communication interface, a Bluetooth communication interface, an Ethernet communication interface, and / or a cellular network communication interface.

[0097] In this embodiment, the communication interface 112 includes wireless communication interfaces such as a Wi-Fi communication interface and / or a Bluetooth communication interface. For example, the battery management circuit board 102 communicates with the monitoring module circuit board 110 via a Serial Peripheral interface (SPI), a Universal Asynchronous Receiver / Transmitter (UART), or a Controller Area Network (CAN) communication interface.

[0098] Communication interface 112 may also include an Ethernet communication interface. For example, the battery management board 102 and the port physical layer (PHY) chip on the monitoring module board 110 communicate via Ethernet through a reduced media independent interface (RMII) or a media independent interface (MII).

[0099] The communication interface 112 may also include a cellular network communication interface, which, for example, includes 2G, 3G, 4G or 5G cellular network communication.

[0100] In some embodiments of this application, optionally, such as Figure 3 As shown, the monitoring module circuit board 110 also includes a monitoring power module 114, which is electrically connected to the power supply module 1022; wherein, the power supply module 1022 provides power to the monitoring power module 114, and the monitoring power module 114 is used to supply power to the communication interface 112.

[0101] In this embodiment, a monitoring power module 114 is provided on the monitoring module circuit board 110. After the monitoring module circuit board 110 and the battery management circuit board 102 are connected via a board-to-board connector 1023, the monitoring power module 114 is electrically connected to the power supply module 1022. At this time, the power supply module 1022 outputs electrical energy to the power supply module. After receiving the electrical energy sent by the power supply module 1022, the power supply module 1022 uses the received electrical energy to power the communication interface 112.

[0102] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0103] In the description of this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this application, 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.

[0104] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage system, characterized in that, include: A battery management circuit board, wherein a first controller and a power supply module are disposed on the battery management circuit board, the power supply module is electrically connected to the first controller, and the battery management circuit board further includes a board-to-board connector; A functional board, comprising functional modules, is electrically connected to the battery management circuit board via a board-to-board connector; wherein, the power supply module supplies power to the functional board via the board-to-board connector, and the functional modules are communicatively connected to the first controller via the board-to-board connector; The battery management circuit board includes a first side and a second side. The functional board is disposed facing the first side of the battery management circuit board, and the functional board is stacked with the battery management circuit board in the direction from the second side of the battery management circuit board to the first side.

2. The energy storage system according to claim 1, characterized in that, The functional board includes at least one of a current limiting module circuit board, an active balancing module circuit board, and a monitoring module circuit board.

3. The energy storage system according to claim 1, characterized in that, Also includes: A fixed bracket is provided, with its first end connected to the battery management circuit board and its second end connected to the function board. The function board and the battery management circuit board are stacked together via the fixed bracket.

4. The energy storage system according to claim 1, characterized in that, The functional board includes a current limiting module circuit board, the functional module includes a current limiting circuit, and the energy storage system further includes: An energy storage battery, wherein the charging input terminal of the energy storage battery is electrically connected to the current limiting circuit; An energy storage inverter, wherein the energy storage inverter is electrically connected to the discharge output terminal of the energy storage battery and the current limiting circuit; The battery management circuit board also includes a current limiting detection module, which is used to detect the parameter information of the energy storage battery; wherein, when the parameter information meets the preset conditions, the first controller sends a current limiting signal to the current limiting circuit to control the current limiting circuit to limit the charging current value of the energy storage battery.

5. The energy storage system according to claim 4, characterized in that, The current limiting circuit includes: A resistor, the first end of which is electrically connected to the energy storage battery; An inductor, wherein a first terminal of the inductor is electrically connected to a second terminal of the resistor; A switching transistor, wherein the first end of the switching transistor is electrically connected to the second end of the inductor, and the second end of the switching transistor is electrically connected to the energy storage inverter; A switch driver module is electrically connected to the control terminal of the switch transistor. The switch driver module is used to receive the current limiting signal and control the switch transistor to operate according to the current limiting signal, so as to limit the charging current value of the energy storage battery.

6. The energy storage system according to claim 4, characterized in that, The battery management circuit board also includes a current detection module, which is communicatively connected to the first controller and is used to detect the current value of the current limiting circuit.

7. The energy storage system according to claim 1, characterized in that, The energy storage system also includes an energy storage battery, which comprises multiple cells. The functional board also includes an active equalization module circuit board. The functional module includes an equalization module and a second controller. The second controller is communicatively connected to the first controller and the equalization module. The battery management circuit board also includes an analog front-end module, which is communicatively connected to the first controller. The analog front-end module is used to collect the cell voltage of the battery cell and determine the voltage difference of multiple battery cells. When the voltage difference is greater than a voltage difference threshold, the first controller sends an equalization signal to the second controller so that the second controller controls the equalization module to start the active equalization mode.

8. The energy storage system according to claim 7, characterized in that, The equalization module includes: Switching matrices, isolated DC-DC power supplies, and / or energy storage devices.

9. The energy storage system according to claim 7, characterized in that, The active equalization module circuit board also includes: A balancing power module is electrically connected to the power supply module, the balancing module, and the second controller; wherein the power supply module provides power to the balancing power module, and the balancing power module supplies power to the balancing module and the second controller.

10. The energy storage system according to any one of claims 1 to 9, characterized in that, The functional board also includes a monitoring module circuit board, and the functional module includes a communication interface; The first controller is also used to collect the operating information of the energy storage system and send the operating information to the communication interface; The communication interface is used to send the operation information to the target terminal; or, to receive control commands sent by the target terminal and send the control commands to the first controller.

11. The energy storage system according to claim 10, characterized in that, The communication interface includes: Wi-Fi communication interface, Bluetooth communication interface, Ethernet communication interface and / or cellular network communication interface.

12. The energy storage system according to claim 10, characterized in that, The functional module also includes: A monitoring power module is electrically connected to the power supply module; wherein the power supply module provides power to the monitoring power module, and the monitoring power module supplies power to the communication interface.

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