Wireless lithium battery display screen

Abstract

The invention discloses a wireless lithium battery display screen, the wireless lithium battery display screen comprises a display screen main body, a main control module and a power supply module, the display screen main body, the main control module and the power supply module are integrated into a whole, the power supply module is electrically connected with the display screen main body and the main control module, and the main control module is electrically connected with the display screen main body. The power supply module is used for supplying power to the display screen main body and the main control module; the input end of the display screen main body is electrically connected with the output end of the main control module, and the main control module is in communication connection with the BMS systems of the plurality of lithium battery modules, so that various data of the battery modules monitored by the BMS systems of the plurality of lithium battery modules can be transmitted to the main control module. The wireless lithium battery display screen can display and feed back the battery state data of a plurality of battery packs without being connected with the battery packs through a wire harness, so that the space occupied by the display equipment for the battery mounting bin body is effectively reduced, and the mounting flexibility of the display screen is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery display screens, and in particular to a wireless lithium battery display screen. Background Art

[0002] In solar energy storage systems, lithium battery modules are mainly used to store excess electricity generated by solar energy and release it when needed to maintain a continuous supply of electricity. Lithium battery modules are usually equipped with a battery management system (BMS) to ensure that the voltage, current and temperature of each battery cell are within a safe range. BMS can also achieve balanced charging of the battery to protect the battery from damage such as overcharging and over-discharging. BMS is crucial to the safety and life of lithium batteries, especially in solar energy storage applications, where batteries may require frequent charge and discharge cycles. The main functions of BMS include battery monitoring, battery protection, battery balancing, state estimation and data communication. The battery monitoring function of BMS is mainly based on the voltage monitoring modules, temperature monitoring modules, current monitoring modules and control units of the BMS module. Specifically, BMS monitors the voltage, current and temperature state parameters of the lithium battery module in real time through voltage sensors, current sensors and temperature sensors, and judges the current operating status of the battery module based on the analysis of the control unit, and then protects and balances the battery module to ensure the stable and safe operation of the lithium battery module.

[0003] At present, based on BMS, the battery status of the lithium battery module is generally fed back to the user through an LCD screen or an OLED screen to display the status parameters. However, the display screen of the above-mentioned lithium battery module can only be matched and connected with the BMS of a single battery module to display the collected data of the BMS accordingly. When multiple battery modules are used in conjunction, a single display screen cannot be connected to multiple battery modules, resulting in limitations in the use of the display screen. In addition, the connection harness between the display screen and the BMS has a high space occupancy rate inside the battery box, resulting in redundant wire groups inside the battery box, increasing the design volume of the battery box, and affecting the portability of the lithium battery module. Summary of the invention

[0004] Based on this, it is necessary to provide a wireless lithium battery display screen to address the technical problems of limitations in the use of existing battery module display screens.

[0005] A wireless lithium battery display screen comprises a display screen body, a main control module and a power module, wherein the display screen body, the main control module and the power module are integrated into one, wherein the power module is electrically connected to the display screen body and the main control module respectively to supply power to the display screen body and the main control module; an input end of the display screen body is electrically connected to an output end of the main control module, and the main control modules are respectively connected to the BMS systems of several lithium battery modules for communication, so that various data of the battery modules monitored by the BMS systems of the several lithium battery modules can be transmitted to the main control module, and then the main control module transmits the data to the display screen body for display feedback.

[0006] The main control module includes a main controller, a reset circuit, a debugging circuit and a clock circuit; the reset circuit, the debugging circuit, the clock circuit, the display screen body and the power module are electrically connected to the main controller respectively; wherein the main controller is set to be an nRF52840 chip, and correspondingly, the BMS systems of several lithium battery modules form several BMS nodes, and the main controller communicates and connects with several BMS nodes respectively through the BLE Bluetooth communication module integrated in the nRF52840 chip, so that the main controller can respectively collect the voltage, current, temperature and other status data of the corresponding lithium battery packs of several BMS nodes in real time, and finally display the status data through the display screen body for feedback.

[0007] In one of the embodiments, each of the above-mentioned BMS nodes includes a Bluetooth communication module, a voltage sensor, a current sensor and a temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively connected to the corresponding lithium battery module, so as to monitor the voltage, current and temperature of the lithium battery module in real time, and the lithium battery module can supply power to the voltage sensor, the current sensor and the temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively communicated with the Bluetooth communication module to transmit the voltage, current and temperature data of the lithium battery module in real time to the Bluetooth communication module; the Bluetooth communication module can be communicated with the main controller to realize the measurement and feedback process of the voltage, current and temperature data of the battery module.

[0008] In one embodiment, the above-mentioned Bluetooth communication module is configured as an nRF52840 chip, so that the voltage sensor, the current sensor and the temperature sensor are communicatively connected to the corresponding Bluetooth communication module via the I2C / SPI interface of the corresponding nRF52840 chip.

[0009] In one of the embodiments, the above-mentioned Bluetooth communication module is electrically connected to the corresponding lithium battery module, so that the lithium battery module can supply power to the corresponding Bluetooth communication module to drive the corresponding nRF52840 chip to operate stably.

[0010] In one of the embodiments, when each of the above-mentioned BMS nodes operates as a Bluetooth slave device, it uses BLE to broadcast its lithium battery module status data. Based on this, the corresponding lithium battery module status data can be packaged into a BLE broadcast packet or send detailed data to the main controller through the GATT service after the BLE connection.

[0011] In one of the embodiments, each of the above-mentioned BMS nodes defines the voltage, current, temperature and other parameters of the lithium battery module as characteristic values ​​through the GATT service; then defines a BLE service, including the above-mentioned characteristic values ​​such as voltage, current and temperature, collects status data at preset time intervals, and packages the characteristic value data and sends it to the main controller, so as to realize the wireless lithium battery display to monitor the status parameters of the lithium battery module.

[0012] In one of the embodiments, the above-mentioned display screen body is configured as an LED screen, and correspondingly, the main control module also includes a display interface DA module, the input end of the display interface DA module is electrically connected to the output end of the main controller, and the output end of the display interface DA module is electrically connected to the input end of the LED screen.

[0013] In one embodiment, the above-mentioned display interface DA module is set to an ADV7125 chip to convert the data image output by the main controller into red, green and blue primary color signals that can be received by the VGA interface. Then, the LED screen can be connected to the ADV7125 chip through the VGA interface to receive the color image signal output by the main control module.

[0014] In one embodiment, the above-mentioned display interface DA module is provided with a DDC interface circuit, one end of the DDC interface circuit is electrically connected to the main controller, and the other end of the DDC interface circuit is electrically connected to the display screen body, so that the main controller realizes communication connection with the display screen body through the DDC interface circuit.

[0015] In one embodiment, the SDA terminal and the SCL terminal of the above-mentioned DDC interface circuit are respectively connected to P0.11 and P0.12 of the main controller nRF52840 chip, so as to realize the communication connection between the main controller and the DDC interface circuit.

[0016] In one embodiment, the SDA terminal of the DDC interface circuit is connected to a pull-up resistor R16, and the SCL terminal is connected to a pull-up circuit R17, so as to improve the read and write reliability of the DDC interface circuit and enhance the I 2 The driving ability of C.

[0017] In one of the embodiments, the main controller is configured as a Bluetooth master device, which is responsible for scanning and connecting to several BMS nodes. The BLE Bluetooth communication module integrated in the nRF52840 chip supports a multi-point connection function, thereby being able to communicate with multiple BMS nodes simultaneously.

[0018] In one of the embodiments, the main controller reads data such as voltage, current and temperature from each connected BMS node by polling, analyzes the received data, transmits and updates it to the UI interface of the display screen, and displays the status of each lithium battery module in real time.

[0019] In one embodiment, the main controller defines a device list including all connected BMS nodes and their status information, and then obtains the latest data from each BMS node periodically through GATT and updates the display.

[0020] In one embodiment, the main display screen interface can scroll and display status data of different lithium battery modules, or can display multiple groups of status data.

[0021] In one embodiment, the power module further includes a power supply battery and an LDO regulator, the positive pole of the power supply battery is electrically connected to the input end of the LDC regulator, the output end of the LDC regulator is electrically connected to the VCC pin of the main controller, and the negative pole of the power supply battery is connected to the GND pin of the main controller, thereby forming a power supply circuit.

[0022] In one embodiment, the LDO regulator is MCP1700-3.3V, which has stabilized the voltage to 3.3V, thereby ensuring the normal operation of the main controller.

[0023] The above-mentioned wireless lithium battery display screen is electrically connected to the output end of the main control module through the input end of the display screen body, and the main control module is respectively connected to the BMS system of several lithium battery modules, so that the various data of the battery modules monitored by the BMS system of several lithium battery modules can be transmitted to the main control module. The main controller is set to the nRF52840 chip, and correspondingly, the BMS system of several lithium battery modules forms several BMS nodes. The main controller communicates with several BMS nodes respectively through the BLE Bluetooth communication module integrated in the nRF52840 chip, so that the main controller can collect the voltage, current, temperature and other status data of the corresponding lithium battery group from several BMS nodes in real time, and finally display the status data through the display screen body. Compared with the existing lithium battery with data display function, the wireless lithium battery display screen does not need to be connected between the battery packs through the wiring harness, and can display and feedback the battery status data of multiple battery packs, so that the battery installation compartment does not need to reserve a wiring harness channel for the display screen, thereby effectively reducing the space occupied by the display device on the battery installation compartment, and effectively improving the installation flexibility of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a wireless lithium battery display screen in one embodiment; Figure 2 The figure is a schematic diagram of the DDC interface circuit structure of a wireless lithium battery display screen in one embodiment. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] See also Figure 1The present invention discloses a wireless lithium battery display screen, which includes a display screen body 100, a main control module 200 and a power module 300. The display screen body 100, the main control module 200 and the power module 300 are integrated into one body, wherein the power module 300 is electrically connected to the display screen body 100 and the main control module 200 respectively to supply power to the display screen body 100 and the main control module 200; the input end of the display screen body 100 is electrically connected to the output end of the main control module 200, and the main control module 200 is respectively connected to the BMS system of a plurality of lithium battery modules 410 for communication, so that various data of the battery modules monitored by the BMS system of the plurality of lithium battery modules 410 can be transmitted to the main control module 200, and then the main control module 200 transmits the data to the display screen body 100 for display feedback. Specifically, the main control module 200 includes a main controller 210, a reset circuit 220, a debugging circuit 230 and a clock circuit 240; the reset circuit 220, the debugging circuit 230, the clock circuit 240, the display screen body 100 and the power module 300 are electrically connected to the main controller 210 respectively; wherein the main controller 210 is set to be an nRF52840 chip, and correspondingly, the BMS system of several lithium battery modules 410 forms several BMS nodes 420, and the main controller 210 communicates with several BMS nodes 420 respectively through the BLE Bluetooth communication module integrated in the nRF52840 chip, so that the main controller 210 can respectively collect the voltage, current, temperature and other status data of the corresponding lithium battery packs from the several BMS nodes 420 in real time, and finally display the status data through the display screen body 100 for feedback. Compared with existing lithium batteries with data display functions, the wireless lithium battery display screen does not need to be connected by wiring harnesses between battery packs, and can display and feedback the battery status data of multiple battery packs, so that the battery installation compartment does not need to reserve a wiring harness channel for the display screen, thereby effectively reducing the space occupied by the display device in the battery installation compartment, and effectively improving the installation flexibility of the display screen.

[0032] Furthermore, each BMS node 420 includes a Bluetooth communication module 421, a voltage sensor 422, a current sensor 423 and a temperature sensor 424; the voltage sensor 422, the current sensor 423 and the temperature sensor 424 are respectively connected to the corresponding lithium battery module 410, so as to monitor the voltage, current and temperature of the lithium battery module 410 in real time, and the lithium battery module 410 can supply power to the voltage sensor 422, the current sensor 423 and the temperature sensor 424; the voltage sensor 422, the current sensor 423 and the temperature sensor 424 are respectively communicated with the Bluetooth communication module 421 to transmit the voltage, current and temperature data of the lithium battery module 410 to the Bluetooth communication module 421 in real time; the Bluetooth communication module 421 can be communicated with the main controller 210, thereby realizing the measurement and feedback process of the voltage, current and temperature data of the battery module. Specifically, the Bluetooth communication module 421 is set as an nRF52840 chip, so that the voltage sensor 422, the current sensor 423 and the temperature sensor 424 are connected to the corresponding Bluetooth communication module 421 through the I2C / SPI interface of the corresponding nRF52840 chip. More specifically, the Bluetooth communication module 421 is electrically connected to the corresponding lithium battery module 410, so that the lithium battery module 410 can supply power to the corresponding Bluetooth communication module 421 to drive the corresponding nRF52840 chip to operate stably.

[0033] Furthermore, when each BMS node 420 operates as a Bluetooth slave device, it uses BLE to broadcast the status data of its lithium battery module 410. Based on this, the corresponding status data of the lithium battery module 410 can be packaged into a BLE broadcast packet or send detailed data to the main controller 210 through the GATT service after the BLE connection. Specifically, each BMS node 420 defines the voltage, current, temperature and other parameters of the lithium battery module 410 as characteristic values ​​through the GATT service, and then defines a BLE service, including the above-mentioned characteristic values ​​such as voltage, current and temperature, collects status data at preset intervals, and packages the characteristic value data and sends it to the main controller 210, so as to realize the wireless lithium battery display screen to monitor the status parameters of the lithium battery module 410.

[0034] Furthermore, the display screen body 100 is configured as an LED screen, and correspondingly, the main control module 200 further includes a display interface DA module 250, the input end of the display interface DA module 250 is electrically connected to the output end of the main controller 210, and the output end of the display interface DA module 250 is electrically connected to the input end of the LED screen. In one embodiment, the display interface DA module 250 is configured as an ADV7125 chip to convert the data image output by the main controller 210 into a red, green and blue primary color signal that can be received by the VGA interface, and then the LED screen can be connected to the ADV7125 chip through the VGA interface to receive the color image signal output by the main control module 200.

[0035] See also Figure 2 Furthermore, the display interface DA module 250 is provided with a DDC interface circuit 251, one end of the DDC interface circuit 251 is electrically connected to the main controller 210, and the other end of the DDC interface circuit 251 is electrically connected to the display screen main body 100, so that the main controller 210 realizes communication connection with the display screen main body 100 through the DDC interface circuit 251. Specifically, the SDA end and the SCL end of the DDC interface circuit 251 are respectively connected to the P0.11 and P0.12 of the nRF52840 chip of the main controller 210, so as to realize the communication connection between the main controller 210 and the DDC interface circuit 251. More specifically, the SDA end of the DDC interface circuit 251 is connected to a pull-up resistor R16, and the SCL end is connected to a pull-up circuit R17, so as to improve the reading and writing reliability of the DDC interface circuit 251 and enhance the I 2 The driving ability of C.

[0036] Furthermore, the main controller 210 is configured as a Bluetooth master device, responsible for scanning and connecting to several BMS nodes 420. The BLE Bluetooth communication module integrated in the nRF52840 chip supports multi-point connection function, so that it can communicate with multiple BMS nodes 420 at the same time. Specifically, the main controller 210 reads data such as voltage, current and temperature from each connected BMS node 420 through polling or event triggering, and parses the received data, transmits and updates it to the UI interface of the display screen body 100, and displays the status of each lithium battery module 410 in real time. Furthermore, the main controller 210 defines a device list, which contains all connected BMS nodes 420 and their status information, and then obtains the latest data from each BMS node 420 through GATT and updates the display. In one embodiment, the display screen body 100 interface can scroll to display the status data of different lithium battery modules 410, or display multiple groups of status data.

[0037] Furthermore, the power module 300 also includes a power supply battery 310 and an LDO regulator 320, the positive electrode of the power supply battery 310 is electrically connected to the input end of the LDC regulator, the output end of the LDC regulator is electrically connected to the VCC pin of the main controller 210, and the negative electrode of the power supply battery 310 is connected to the GND pin of the main controller 210, thereby forming a power supply circuit. In one embodiment, the LDO regulator 320 uses MCP1700-3.3V, which has stabilized the voltage to 3.3V, thereby ensuring the normal operation of the main controller 210.

[0038] In summary, the wireless lithium battery display screen disclosed by the present invention is electrically connected to the output end of the main control module through the input end of the display screen body, and the main control module is respectively connected to the BMS system of several lithium battery modules, so that the various data of the battery modules monitored by the BMS system of several lithium battery modules can be transmitted to the main control module. The main controller is set to the nRF52840 chip, and correspondingly, the BMS system of several lithium battery modules forms several BMS nodes. The main controller communicates with several BMS nodes respectively through the BLE Bluetooth communication module integrated in the nRF52840 chip, so that the main controller can collect the voltage, current, temperature and other status data of the corresponding lithium battery group in real time for several BMS nodes, and finally display the status data through the display screen body. Compared with the existing lithium battery with data display function, the wireless lithium battery display screen does not need to be connected between the battery packs through the wiring harness, and can display and feedback the battery status data of multiple battery packs, so that the battery installation compartment does not need to reserve a wiring harness channel for the display screen, thereby effectively reducing the space occupied by the display device on the battery installation compartment, and effectively improving the installation flexibility of the display screen.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wireless lithium battery display screen, characterized in that: include: A display screen body, a main control module and a power module, wherein the display screen body, the main control module and the power module are integrated into one body, and the power module is electrically connected to the display screen body and the main control module respectively to supply power to the display screen body and the main control module; an input end of the display screen body is electrically connected to an output end of the main control module, and the main control module is respectively connected to the BMS system of several lithium battery modules for communication, so that various data of the battery modules monitored by the BMS system of several lithium battery modules can be transmitted to the main control module, and then the main control module transmits the data to the display screen body for display feedback; The main control module includes a main controller, a reset circuit, a debugging circuit and a clock circuit; the reset circuit, the debugging circuit, the clock circuit, the display screen body and the power module are electrically connected to the main controller respectively; The main controller is configured as an nRF52840 chip, and correspondingly, the BMS systems of the several lithium battery modules form several BMS nodes. The main controller communicates with the several BMS nodes respectively through the BLE Bluetooth communication modules integrated in the nRF52840 chip, so that the main controller can respectively collect the voltage, current, temperature and other status data of the corresponding lithium battery packs of the several BMS nodes in real time, and finally display the status data through the display screen body for feedback.

2. The wireless lithium battery display screen according to claim 1, characterized in that: Each of the BMS nodes includes a Bluetooth communication module, a voltage sensor, a current sensor and a temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively connected to the corresponding lithium battery module, so as to monitor the voltage, current and temperature of the lithium battery module in real time, and the lithium battery module can supply power to the voltage sensor, the current sensor and the temperature sensor; the voltage sensor, the current sensor and the temperature sensor are respectively communicated with the Bluetooth communication module to transmit the voltage, current and temperature data of the lithium battery module to the Bluetooth communication module in real time; the Bluetooth communication module can be communicated with the main controller to realize the measurement and feedback process of the voltage, current and temperature data of the battery module.

3. The wireless lithium battery display screen according to claim 2, characterized in that: The Bluetooth communication module is configured as an nRF52840 chip, so that the voltage sensor, the current sensor and the temperature sensor are communicatively connected with the corresponding Bluetooth communication module via the I2C / SPI interface of the corresponding nRF52840 chip.

4. The wireless lithium battery display screen according to claim 3, characterized in that: The Bluetooth communication module is electrically connected to the corresponding lithium battery module, so that the lithium battery module can supply power to the corresponding Bluetooth communication module to drive the corresponding nRF52840 chip to operate stably.

5. The wireless lithium battery display screen according to claim 4, characterized in that: When each of the BMS nodes operates as a Bluetooth slave device, it uses BLE to broadcast its lithium battery module status data. Based on this, the corresponding lithium battery module status data can be packaged into a BLE broadcast packet or send detailed data to the main controller through the GATT service after the BLE connection.

6. The wireless lithium battery display screen according to claim 5, characterized in that: Each of the BMS nodes defines the voltage, current, temperature and other parameters of the lithium battery module as characteristic values ​​through the GATT service; then defines a BLE service, including the above-mentioned characteristic values ​​such as voltage, current and temperature, collects status data at preset intervals, and packages the characteristic value data and sends it to the main controller, so as to realize the monitoring of the status parameters of the lithium battery module by the wireless lithium battery display.

7. The wireless lithium battery display screen according to claim 6, characterized in that: The display screen body is configured as an LED screen, and correspondingly, the main control module also includes a display interface DA module, the input end of the display interface DA module is electrically connected to the output end of the main controller, and the output end of the display interface DA module is electrically connected to the input end of the LED screen.

8. The wireless lithium battery display screen according to claim 7, characterized in that: The display interface DA module is set as an ADV7125 chip to convert the data image output by the main controller into red, green and blue primary color signals that can be received by the VGA interface. Then, the LED screen can be connected to the ADV7125 chip through the VGA interface to receive the color image signal output by the main control module.

9. The wireless lithium battery display screen according to claim 8, characterized in that: The main controller is configured as a Bluetooth master device, responsible for scanning and connecting to a number of the BMS nodes. The BLE Bluetooth communication module integrated in the nRF52840 chip supports a multi-point connection function, thereby being able to communicate with a plurality of the BMS nodes simultaneously.

10. The wireless lithium battery display screen according to claim 9, characterized in that: The main controller reads data such as voltage, current and temperature from each connected BMS node through polling, analyzes the received data, transmits and updates it to the UI interface of the display screen body, and displays the status of each lithium battery module in real time.

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