Wireless battery management communication device for energy storage power station

Abstract

The utility model relates to the technical field of energy storage power station management, in particular to a wireless battery management device. The management communication device mainly comprises an energy storage acquisition device and a management terminal, the management communication device further comprises a communication management device, and the communication management device comprises a data input circuit connected with the energy storage acquisition device, an Internet of Things controller connected with the data input circuit and a wireless communication circuit connected with the Internet of Things controller; the wireless communication circuit comprises an LPWAN radio frequency module, and the LPWAN radio frequency module is in wireless communication with a management terminal. Due to the low-power long-distance transmission characteristic of the LPWAN, the energy consumption of the communication management device can be saved and the long-distance distribution of data can be realized on the premise of accurate information transmission, so that one management terminal can realize the centralized management of a plurality of energy storage devices, the large-scale upgrading of an energy storage power station is facilitated, and the energy storage efficiency is improved. And the high information communication requirement of the existing energy storage power station is met.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage power station management, in particular to a wireless battery management device. Background Art

[0002] Energy storage power station is a facility that uses batteries and other energy storage devices to store and release electric energy. It has the functions of regulating grid load, improving energy utilization, and promoting the development of new energy. One of the core components of energy storage power station is the battery management system (BMS), which is responsible for status monitoring, protection control, status estimation and balance management of energy storage devices, thereby ensuring the safety of energy storage devices and the stable operation of energy storage power stations.

[0003] At present, the BMS of energy storage power stations usually adopts wired communication technology, that is, through transmission media such as cables or optical fibers, to achieve data transmission and control command interaction between energy storage devices and management terminals. However, the wired communication technology of BMS of wired energy storage power stations has the following disadvantages: first, the wiring is complicated, which increases the construction cost and maintenance difficulty of energy storage power stations; second, its management and expansion lack flexibility and adaptability, and it is difficult to meet the diverse needs of energy storage power stations.

[0004] In addition, there are also BMSs based on wireless communication technology. For example, a Chinese patent document with publication number CN220076304U discloses a wireless battery management device based on an RF chip, which realizes wireless transmission of battery status information based on RF chip technology. However, the RF chip technology based on the above device is only suitable for short-distance communication scenarios, such as the application of vehicle-mounted battery packs, and cannot achieve good results in large-scale scenarios such as energy storage power stations with long-distance transmission requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a wireless battery management communication device for an energy storage power station, which can send the monitoring data of the energy storage device collected in real time to the management terminal in the form of wireless transmission, which reduces the maintenance difficulty compared to wired transmission; and the transmission distance of the monitoring data information is long, which meets the modern work needs of the energy storage power station.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A wireless battery management and communication device for an energy storage power station, comprising an energy storage collection device and a management terminal, characterized in that the management and communication device also comprises a communication management device, the communication management device comprises a data input circuit connected to the energy storage collection device, an Internet of Things controller connected to the data input circuit, and a wireless communication circuit connected to the Internet of Things controller; the wireless communication circuit comprises a LPWAN radio frequency module, and the LPWAN radio frequency module communicates wirelessly with the management terminal.

[0008] Therefore, the energy storage device is the main electric energy storage unit of the energy storage power station, that is, a plurality of battery packs arranged in an array. In order to meet its status monitoring, protection control, status estimation, balance management and other functions and ensure the safety and performance of the energy storage battery, the battery pack is provided with an energy storage collection device, such as a voltage and current detection sensor, a temperature sensor, etc. The above energy storage collection device will collect a large amount of battery pack status data in real time. In order to realize the above functions, the management terminal needs to receive and analyze the above battery pack status data.

[0009] The communication management device is composed of multiple circuit modules, and its data input circuit can be mainly composed of RS485 serial port circuit, which can receive data from the energy storage collection device and transmit the corresponding digital signal to the IoT controller electrically connected to it. The IoT controller is the IoT MCU, which is used to organize and sub-packetize the received battery pack status data, and package data of different types and different times into data packets according to preset commands, such as 1024-byte data packets, and transmit them to the wireless communication circuit at set time intervals. It is mainly responsible for wireless communication with remote management terminals, and includes LPWAN radio frequency modules. LPWAN is a low-power wide area network. The radio frequency module can use a low bit rate for long-distance communication wireless network to meet the needs of remote management terminals. The battery pack status data in the energy storage device is processed and transmitted by the communication management device, and sent to the management terminal in the wireless form of LPWAN.

[0010] Due to the low-power and long-distance transmission characteristics of LPWAN, it can save the energy consumption of communication management devices and realize long-distance distribution of data under the premise of accurate information transmission, so that one management terminal can realize centralized management of multiple energy storage devices, which is conducive to the large-scale upgrade of energy storage power stations and meets the high information communication needs of current energy storage power stations.

[0011] As a preferred embodiment of the present invention, the data input circuit is an RS485 circuit, one end of the RS485 circuit is connected to the energy storage collection device; and the other end is connected to the Internet of Things controller.

[0012] The RS485 circuit uses an RS485 chip, which is connected to the energy storage acquisition device responsible for collecting battery pack status data through a differential line, converts the RS485 level into a TTL level, and realizes the function of transmitting the battery pack status data to the connected IoT MCU, which is convenient for the IoT MCU to process. The chip has strong anti-interference ability and stable operation, which can ensure the stable input of data information from the energy storage acquisition device to the IoT MCU.

[0013] As a preferred embodiment of the present invention, the wireless battery management communication device further comprises an RC delay circuit connected to the Internet of Things controller.

[0014] Therefore, in order to facilitate the maintenance of the entire device, the IoT MCU may be reset and restarted in some fault conditions. The RC delay circuit is composed of a 10KΩ resistor, a 1uf capacitor and a push switch. When the switch is long pressed, a reset level can be given to the IoT MCU. The setting of the RC delay circuit can avoid accidental intervention caused by accidentally touching the push switch.

[0015] As a preferred embodiment of the present invention, electrical isolation is provided between the LPWAN radio frequency module and the Internet of Things controller, and a common ground is provided through a jumper cap.

[0016] Since the LPWAN RF module and other circuit modules such as the IoT MCU are high-frequency components, in order to reduce the impact of mutual interference on signal transmission and reception, electrical isolation is set between the LPWAN RF module and other circuits, and the jumper cap is used to share the ground. A jumper cap is an electronic component that is mainly used for electrical connections on circuit boards. It is usually composed of a plastic shell and metal pins. It can be inserted into different positions on the circuit board to connect or disconnect the wires between circuit nodes and electronic components. It functions like a plug and a socket, but with additional protection measures to ensure the stability and safety of circuit connections.

[0017] As a preferred embodiment of the present invention, the wireless communication circuit further includes an antenna module and a control unit arranged between the antenna module and the LPWAN radio frequency module, and the LPWAN radio frequency module performs wireless communication with the management terminal through the antenna module.

[0018] Thus, the LPWAN radio frequency module transmits the battery status data packet wirelessly to the remote management terminal through the antenna module. A control unit is also set between the two, which is composed of multiple resistors. When the signal strength needs to be adjusted, it can be achieved by changing the number, position and size of the resistor welding of the control unit.

[0019] As a preferred embodiment of the present invention, the wireless battery management communication device further includes a voltage stabilizing circuit connected to an external power source for providing a stable operating voltage.

[0020] Therefore, in order to ensure that the management communication device works stably and the output signal is continuous and accurate, a voltage stabilizing circuit is specially set up, which consists of a power supply voltage stabilizing chip XL1509, two capacitors connected to its input end for filtering noise, and a 47uH inductor connected in series with its output end. It is used to provide voltage for the entire management communication device to avoid the influence of external input voltage on processor performance and signal output.

[0021] As a preferred embodiment of the present invention, the Internet of Things controller includes a Bluetooth communication module.

[0022] Therefore, the Bluetooth communication module can be a part preset in the Internet of Things MCU, which can mainly realize the Bluetooth connection between the Internet of Things MCU and the external operation and maintenance management device. For example, the staff can connect to the Internet of Things MCU through a handheld device that supports Bluetooth function, modify its configuration files and control commands, and thus change data such as the interval time for sending data packets, so as to better maintain the entire management communication device.

[0023] As a preferred embodiment of the present invention, the Internet of Things controller includes a storage device connected to the Bluetooth communication module.

[0024] Therefore, the storage device can store configuration files of the Internet of Things MCU, etc., which is connected to the Bluetooth communication module. When the Bluetooth communication module receives modification commands and files from the outside world, they can be stored in the device to achieve long-term storage and execution.

[0025] As a preferred embodiment of the present invention, the wireless battery management communication device for the energy storage power station further includes a serial port log output interface, which is connected to the Internet of Things controller and the LPWAN radio frequency module and is used for on-site debugging and status inquiry.

[0026] Therefore, two serial port log output interfaces are provided on the device, through which the staff can check the working logs of the IoT controller and the LPWAN radio frequency module to understand their working status.

[0027] In summary, the utility model has the following beneficial effects:

[0028] 1. Through the cooperation of the data input circuit, IoT controller and wireless communication circuit on the communication management device, the LPWAN radio frequency module sends data recording the battery pack status information to the management terminal, achieving the goal of long-distance transmission under the premise of low power consumption, so that one management terminal can realize centralized management of multiple energy storage devices, which is conducive to the large-scale upgrade of energy storage power stations and meets the high information communication needs of current energy storage power stations.

[0029] 2. By setting up electrical isolation between the LPWAN RF module and the IoT controller, the impact of mutual interference on signal reception and transmission can be reduced, ensuring the stability and security of the circuit connection.

[0030] 3. The Internet of Things controller includes a Bluetooth communication module and a storage device. When the Bluetooth communication module receives modification commands and files from the outside world, they can be stored in the device to achieve long-term storage and execution, so that staff can connect to the Internet of Things controller through a handheld device that supports Bluetooth function, thereby changing data such as the interval time for sending data packets, and better maintaining the entire management communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural block diagram of the wireless battery management communication device;

[0032] Figure 2 It is a schematic diagram of the structure of a wireless communication circuit;

[0033] Figure 3 This is the circuit diagram of the IoT controller;

[0034] Figure 4 It is the schematic diagram of voltage stabilizing circuit;

[0035] Figure 5 This is a schematic diagram of the data input circuit;

[0036] Figure 6 This is a schematic diagram of the serial port log output interface circuit.

[0037] In the figure: energy storage collection device 1, communication management device 2, data input circuit 21, Internet of Things controller 22, Bluetooth communication module 221, storage device 222, wireless communication circuit 23, LPWAN radio frequency module 231, antenna module 232, control unit 233, management terminal 3, serial port log output interface 4. DETAILED DESCRIPTION

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0039] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0040] Depend on Figure 1 As shown, the energy storage device is the main electric energy storage unit of the energy storage power station, that is, a plurality of battery packs arranged in an array. In order to meet its status monitoring, protection control, status estimation, balance management and other functions and ensure the safety and performance of the energy storage battery, an energy storage acquisition device 1 is provided on the battery pack, such as a voltage and current detection sensor, a temperature sensor, etc. The above energy storage acquisition device 1 will collect a large amount of battery pack status data in real time. In order to realize the above functions, the management terminal 3 needs to receive and analyze the above battery pack status data.

[0041] The communication management device 2 is composed of multiple circuit modules, and its data input circuit 2 is mainly composed of RS485 serial port circuit. Figure 5 As shown, the serial port circuit can receive data from the energy storage collection device 1 and transmit the corresponding digital signal to the Internet of Things controller 22 electrically connected thereto. The serial port circuit adopts the SN65176BDRG4 chip and connects the energy storage collection device 1 circuit through A_485 and B_485. The energy storage collection device 1 sends the battery pack status information to the SN65176BDRG4 through A_485 and B_485, which is then converted into a TTL level signal, and the data is transmitted to the ESP_UART0_TX and ESP_UART0_RX. Figure 3 The IoT MCU shown in the figure can also be constructed using RS232 serial port circuit.

[0042] The IoT controller 22 is an IoT MCU, which is used to sort and sub-pack the received battery pack status data, and pack and send data of different types and at different times according to preset commands, such as Figure 3 The IoT MCU model shown is ESP32C3WROOM02, which transmits data to the wireless communication circuit 23 at set time intervals. Data can be delivered between the IoT MCU and the wireless communication circuit 23 via SPI or UART protocol.

[0043] The wireless communication circuit 23 is mainly responsible for wireless communication with the remote management terminal 3, and includes an LPWAN radio frequency module 231. LPWAN is a low power wide area network. The radio frequency module can use a low bit rate to communicate over long distances, meeting the need for the management terminal 3 to be located far away. The battery pack status data in the energy storage device is processed and transmitted through the communication management device 2, and sent to the management terminal 3 in a wireless form via LPWAN.

[0044] like Figure 2 As shown, the wireless communication circuit 23 also includes an antenna module 232 and a control unit 233 disposed between the antenna module 232 and the LPWAN radio frequency module 231. The LPWAN radio frequency module 231 communicates wirelessly with the management terminal 3 via the antenna module 232. Thus, the LPWAN radio frequency module 231 transmits the battery status data packet to the remote management terminal 3 via the antenna module. A control unit 233 is also disposed between the two, which is composed of a plurality of resistors. When the signal strength needs to be adjusted, it can be achieved by changing the number, position and size of the resistor welding of the control unit 233.

[0045] like Figure 4The voltage stabilizing circuit shown is connected to an external power supply and is used to provide a stable working voltage. In order to ensure that the management communication device works stably and the output signal is continuous and accurate, a voltage stabilizing circuit is specially set up. It consists of a power supply voltage stabilizing chip XL1509, two capacitors connected to its input end for filtering noise, and a 47uH inductor connected in series with its output end. It is used to provide voltage for the entire management communication device to avoid the influence of external input voltage on processor performance and signal output.

[0046] like Figure 1 As shown, the Internet of Things controller 22 includes a Bluetooth communication module 221 and a storage device 222. When the Bluetooth communication module 221 receives modification commands and files from the outside world, they can be stored in the device to achieve long-term storage and execution, so that staff can connect to the Internet of Things controller 22 through a handheld device that supports Bluetooth function, thereby changing data such as the interval time for sending data packets, and better maintaining the entire management communication device.

[0047] Since the LPWAN RF module 231 and other circuit modules such as the IoT MCU are high-frequency components, in order to reduce the impact of mutual interference on signal transmission and reception, electrical isolation is set between the LPWAN RF module 231 and other circuits, and the jumper cap is used to share the ground. A jumper cap is an electronic component that is mainly used for electrical connection on a circuit board. It is usually composed of a plastic shell and metal pins. It can be inserted into different positions on the circuit board to connect or disconnect the wires between the circuit nodes and the electronic components. It functions like a plug and a socket, but with additional protection measures to ensure the stability and safety of the circuit connection.

[0048] like Figure 6 As shown, the wireless battery management communication device for the energy storage power station also includes a serial port log output interface 4, which is connected to the Internet of Things MCU and the LPWAN radio frequency module 231 and is used for on-site debugging and status inquiry. The staff can use this interface to check the work logs of the Internet of Things MCU and the LPWAN radio frequency module 231 and understand their working status.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless battery management communication device for an energy storage power station, comprising an energy storage collection device (1) and a management terminal (3), characterized in that: The wireless battery management communication device for an energy storage power station further comprises a communication management device (2), wherein the communication management device (2) comprises a data input circuit (21) connected to the energy storage acquisition device (1), an Internet of Things controller (22) connected to the data input circuit (21), and a wireless communication circuit (23) connected to the Internet of Things controller (22); the wireless communication circuit (23) comprises a LPWAN radio frequency module (231), and the LPWAN radio frequency module (231) performs wireless communication with the management terminal (3).

2. A wireless battery management communication device for an energy storage power station according to claim 1, characterized in that: The data input circuit (21) is an RS485 circuit, one end of the RS485 circuit is connected to the energy storage collection device (1), and the other end is connected to the Internet of Things controller (22).

3. The wireless battery management communication device for energy storage power station according to claim 1, characterized in that: The wireless battery management communication device for the energy storage power station also includes an RC delay circuit connected to the Internet of Things controller (22).

4. The wireless battery management communication device for energy storage power station according to claim 1, characterized in that: Electrical isolation is provided between the LPWAN radio frequency module (231) and the Internet of Things controller (22), and they are grounded via a jumper cap.

5. The wireless battery management communication device for energy storage power station according to claim 4, characterized in that: The wireless communication circuit (23) further comprises an antenna module (232) and a control unit (233) arranged between the antenna module (232) and the LPWAN radio frequency module (231); the LPWAN radio frequency module (231) performs wireless communication with the management terminal (3) via the antenna module (232).

6. The wireless battery management communication device for energy storage power station according to claim 1, characterized in that: The wireless battery management communication device for the energy storage power station also includes a voltage stabilizing circuit connected to an external power source for providing a stable operating voltage.

7. The wireless battery management communication device for energy storage power station according to claim 1, characterized in that: The Internet of Things controller (22) comprises a Bluetooth communication module (221).

8. The wireless battery management communication device for energy storage power station according to claim 7, characterized in that: The Internet of Things controller (22) comprises a storage device (222) connected to the Bluetooth communication module (221).

9. A wireless battery management communication device for an energy storage power station according to any one of claims 1 to 8, characterized in that: The wireless battery management communication device for an energy storage power station further comprises a serial port log output interface (4), wherein the serial port log output interface is connected to the Internet of Things controller (22) and the LPWAN radio frequency module (231) and is used for on-site debugging and status checking.

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