A battery management system for navigation lights

Abstract

This utility model relates to the field of navigation light battery management technology, and discloses a battery management system for integrated navigation lights, including a battery monitoring module, a solar charging detection module, an MPPT charging module, a microcontroller module, and a communication interface. The first, second, and third terminals of the MPPT charging module are respectively connected to the positive terminal of the battery, the microcontroller module, and the solar charging detection module, while the first terminal of the battery monitoring module is connected to the negative terminal of the battery. This utility model has the following advantages and effects: This system is suitable for integrated navigation lights powered by lithium batteries. To balance performance and cost requirements, the lithium batteries used are commercially available finished lithium batteries such as lithium iron phosphate and ternary lithium batteries with built-in charge and discharge protection functions, thus saving production costs. This battery management system is external, and its operating parameters can be flexibly adjusted to adapt to the different battery requirements of different navigation lights, thereby reducing the types of batteries used in production and lowering the manufacturing cost of navigation lights.

Description

Technical Field

[0001] This utility model relates to the field of navigation light battery management technology, and in particular to a battery management system for navigation lights. Background Technology

[0002] Integrated navigation lights combine the lighting module of traditional navigation lights with power supply, control, and communication systems into a single, highly integrated device. This reduces reliance on external components and improves reliability and ease of maintenance.

[0003] Batteries are an important component of integrated navigation lights. With the widespread use of lithium batteries in navigation lights, battery capacity, safety, health status, and range have become key concerns for all parties.

[0004] Unlike power batteries, which require high capacity and high current charging and discharging, navigation lights have relatively low power consumption and are mostly powered by solar energy, resulting in lower charging and discharging currents. Currently, the batteries used in integrated navigation lights are mainly lithium iron phosphate batteries, which are known for their high safety and long lifespan. The use of ternary lithium and polymer lithium batteries is now extremely limited. Navigation lights currently struggle to meet the requirements for rapid monitoring and management of lithium batteries. Therefore, the inventors have proposed a battery management system for navigation lights. Utility Model Content

[0005] The purpose of this invention is to provide a battery management system for navigation lights, which has the effect of quickly managing the status and operation of navigation light batteries.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a battery management system for navigation lights, including a battery monitoring module, a solar charging detection module, an MPPT charging module, a microcontroller module and a communication interface; The first, second, and third terminals of the MPPT charging module are connected to the positive terminal of the battery, the microcontroller module, and the solar charging detection module, respectively. The first terminal of the battery monitoring module is connected to the negative terminal of the battery. The data input terminal of the microcontroller module is connected to the battery monitoring module and the solar charging detection module, and the data output terminal of the microcontroller module is connected to the communication interface. The microcontroller module collects various state data of battery charging and discharging, reads, analyzes, and processes the data, and reports it to the navigation light through the communication interface.

[0007] A further feature of this invention is that the MPPT charging module includes an MPPT charging circuit, and the MPPT charging circuit contains a chip U101. The connector J101 of the chip U101 is connected to the solar charging detection module.

[0008] The present invention is further configured such that: the chip U101 is a DC / DC conversion control chip with MPPT function, the MPPT charging module is provided with MPPT pin and FB pin, and the MPPT charging circuit is also provided with resistor R101 and transistor Q102 connected to chip U101.

[0009] By adopting the above technical solution, the conduction time of the transistor Q102 driven by it is controlled.

[0010] A further feature of this invention is that the solar charging detection module includes a solar charging detection circuit, and a chip U102 is provided within the solar charging detection circuit. The chip U102 is connected to the MPPT charging circuit.

[0011] By adopting the above technical solution, chip U102 is used to detect the voltage VS output by the solar panel and the charging current IB of the battery.

[0012] A further feature of this invention is that the battery monitoring module includes a battery monitoring circuit, which includes a chip U103, and the chip U103 is connected in series with the negative terminal of the battery through a resistor R119.

[0013] By adopting the above technical solution, the charge / discharge state of the battery, charging current or discharging current can be calculated, and the current can be integrated over time to calculate the battery's discharge capacity and charging capacity.

[0014] A further feature of this invention is that the VEN pin of the chip U103 is connected to transistors Q106 and Q105, and the BAT pin of the chip U103 is connected to resistors R117 and R121.

[0015] By adopting the above technical solution, the VEN pin of chip U103 controls the conduction state of Q106 and Q105.

[0016] A further feature of this invention is that the chip U103 is also connected to a resistor RT101.

[0017] The above technical solution is used to detect battery temperature in U103.

[0018] A further feature of this invention is that the microcontroller module includes a microcontroller circuit, which is connected to chip U101 and chip U103 via an I2C bus.

[0019] By adopting the above technical solution, the microcontroller periodically collects the charging and discharging status data collected by U102 and U103 through the I2C bus.

[0020] The beneficial effects of this utility model are: This system is suitable for integrated navigation lights powered by lithium batteries. To balance performance and cost requirements, the lithium batteries used are commercially available lithium iron phosphate and ternary lithium batteries with built-in charge and discharge protection functions. The batteries do not need to be redesigned, thus saving production costs. The battery management system is external, and its operating parameters can be flexibly adjusted to adapt to the different battery requirements of different navigation lights, thereby reducing the types of batteries used in production and lowering the manufacturing cost of navigation lights. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of a battery management system for a navigation light provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the MPPT charging circuit in an embodiment of the present invention; Figure 3 This is a schematic diagram of the solar charging detection circuit in an embodiment of the present invention; Figure 4 This is a schematic diagram of the battery monitoring circuit in an embodiment of the present invention; Figure 5 This is a schematic diagram of the microcontroller processing and communication interface circuit in an embodiment of the present invention; Figure 6 This is a schematic diagram of the battery management system in an embodiment of the present invention. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] This utility model embodiment specifically provides a battery management system for navigation lights. Please refer to... Figures 1-6 It includes a battery monitoring module, a solar charging detection module, an MPPT charging module, a microcontroller module, and a communication interface.

[0025] The MPPT charging module has its first, second, and third terminals connected to the positive terminal of the battery, the microcontroller module, and the solar charging detection module, respectively. The first terminal of the battery monitoring module is connected to the negative terminal of the battery. The data input terminal of the microcontroller module is connected to the battery monitoring module and the solar charging detection module, and the data output terminal of the microcontroller module is connected to the communication interface. The microcontroller module collects various state data of battery charging and discharging, reads, analyzes, and processes the data, and reports it to the navigation light through the communication interface.

[0026] Specifically, the MPPT charging module includes an MPPT charging circuit, which contains a chip U101. The connector J101 of the chip U101 is connected to the solar charging detection module.

[0027] It is worth noting that MPPT is short for Maximum Power Point Tracking, which means that the controller adjusts the output power of the solar panel according to different characteristics such as light intensity, so that the solar panel always outputs maximum power.

[0028] Among them, chip U101 is a DC / DC conversion control chip with MPPT function, and the MPPT charging module is equipped with MPPT pin and FB pin.

[0029] The MPPT pin of chip U101 sets the maximum power point voltage of the solar panel and detects the output voltage VS of the solar panel in real time; the FB pin sets the charging cut-off voltage of the battery and detects the output voltage VB of the DC / DC conversion circuit, i.e., the battery voltage; R101 detects the output current of the DC / DC conversion circuit, i.e., the charging current IB of the battery.

[0030] The MPPT charging circuit also includes a resistor R101 and a transistor Q102 connected to the chip U101.

[0031] During implementation, chip U101 compares and calculates the detected VS, VB, and IB, controls the output of the DRV pin, thereby controlling the conduction time of the transistor Q102 it drives, adjusting the output voltage VB, which in turn affects the magnitude of VS, ultimately ensuring that the product of the solar panel's output current IS and VS, i.e., the output power of the solar panel, always remains at its maximum value.

[0032] Furthermore, the solar charging detection module includes a solar charging detection circuit, which contains a chip U102. The chip U102 is connected to the MPPT charging circuit. The chip U102 is used to detect the voltage VS output by the solar panel and the charging current IB of the battery, and performs digital conversion for the microcontroller module to read.

[0033] Furthermore, the battery monitoring module includes a battery monitoring circuit, which is used to collect various state data of battery charging and discharging, for the microcontroller module to read, analyze and process, and report to the navigation light through the communication interface (RS485).

[0034] The battery monitoring circuit includes a chip U103, which is connected in series with the negative terminal of the battery through a resistor R119. The resistor R119 is a detection resistor connected in series with the battery to convert the change in battery current into voltage. The chip U103 detects this voltage and converts and calculates the battery's charging and discharging state, charging current or discharging current. It integrates the current over time to calculate the battery's discharge capacity and charging capacity.

[0035] In implementation, transistors Q106 and Q105 are connected to the VEN pin of chip U103, and resistors R117 and R121 are connected to the BAT pin of chip U103. The VEN pin of chip U103 controls the conduction state of Q106 and Q105, so that the voltage divider resistor network composed of R117 and R121 detects the battery voltage, which is input from the BAT pin of U103. U103 detects and converts the battery voltage.

[0036] The chip U103 is also connected to a resistor RT101, which is an NTC thermistor used by U103 to detect the battery temperature. In addition, U103 also integrates a temperature sensor to sense the ambient temperature during circuit operation. When charging, if the battery temperature or the ambient temperature exceeds the battery's safe operating temperature, the microcontroller drives Q101 to stop the charging circuit from charging the battery, thus protecting the battery.

[0037] It is worth noting that the U103 chip obtains the charging and discharging current and voltage change curves of the battery under complete charging and discharging states through pre-learning, and extracts the change curves into battery charging and discharging characteristic model parameters, which are pre-embedded into the U103 chip during the production of navigation lights.

[0038] When the navigation light is in normal use, the U103, after correcting the data such as the detected charging and discharging status, charging and discharging current, battery voltage, temperature, and number of charging and discharging cycles, fits it onto the battery charging and discharging characteristic model. It can then report data such as the battery health status (SOH) and state of charge (SOC) predicted by the model, which can be collected and processed by an external microcontroller.

[0039] Furthermore, the microcontroller module includes a microcontroller circuit, which is connected to chips U101 and U103 via an I2C bus.

[0040] By adopting the above technology, the microcontroller periodically collects the charging and discharging status data collected by U102 and U103 through the I2C bus, processes it through the internal processing program, and reports it to the navigation light through the communication interface (RS485).

[0041] Among them, the battery status data that can be reported to the navigation light includes, but is not limited to: solar panel voltage, battery voltage, charge / discharge status, charging current, discharging current, charging capacity, discharging capacity, remaining capacity (i.e., SOC, state of charge), battery temperature, ambient temperature, and battery health status (SOH).

[0042] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery management system for a beacon light, characterized by: Includes a battery monitoring module, a solar charging detection module, an MPPT charging module, a microcontroller module, and a communication interface; The first, second, and third terminals of the MPPT charging module are connected to the positive terminal of the battery, the microcontroller module, and the solar charging detection module, respectively. The first terminal of the battery monitoring module is connected to the negative terminal of the battery. The data input terminal of the microcontroller module is connected to the battery monitoring module and the solar charging detection module, and the data output terminal of the microcontroller module is connected to the communication interface. The microcontroller module collects the charging and discharging status data of the battery, reads, analyzes, and processes the data, and reports it to the navigation light through the communication interface.

2. A battery management system for a beacon light according to claim 1, characterized in that: The MPPT charging module includes an MPPT charging circuit, which contains a chip U101. The connector J101 of the chip U101 is connected to the solar charging detection module.

3. A battery management system for a beacon light according to claim 2, characterized in that: The chip U101 is a DC / DC conversion control chip with MPPT function. The MPPT charging module is equipped with MPPT pin and FB pin. The MPPT charging circuit is also equipped with resistor R101 and transistor Q102 connected to chip U101.

4. A battery management system for a beacon light according to claim 3, characterized in that: The solar charging detection module includes a solar charging detection circuit, which contains a chip U102 connected to the MPPT charging circuit.

5. A battery management system for a beacon light according to claim 4, characterized in that: The battery monitoring module includes a battery monitoring circuit, which includes a chip U103. The chip U103 is connected in series with the negative terminal of the battery through a resistor R119.

6. A battery management system for a beacon light according to claim 5, characterized in that: The VEN pin of chip U103 is connected to transistors Q106 and Q105, and the BAT pin of chip U103 is connected to resistors R117 and R121.

7. A battery management system for a beacon light according to claim 6, characterized in that: The chip U103 is also connected to a resistor RT101.

8. A battery management system for navigation lights according to claim 7, characterized in that: The microcontroller module includes a microcontroller circuit, which is connected to chips U101 and U103 via an I2C bus.

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