UAV battery health management system and method based on passive readable and writable RFID tags

Abstract

The present invention discloses a battery health management system and method for a drone based on a passive readable and writable RFID tag, comprising: a passive readable and writable RFID tag, an RFID read / write module connected to a charger, a battery health management module of the charger, an RFID read / write module connected to a flight control, and a battery health management module of the flight control; the battery health management module of the charger reads the drone battery health index in the RFID through the RFID read / write module connected to the charger, formulates a charge and discharge strategy, calculates the battery health index, and writes the index into the RFID; the battery health management module of the flight control reads the drone battery health index through the RFID read / write module connected to the flight control, calculates the flight time, records the discharge data of the drone battery during flight, calculates the battery health index, and writes the index into the RFID; the present invention establishes a connection between the charging and discharging process of the drone battery charger and the flight process of the drone, collaboratively completing the drone battery health management, thereby achieving more comprehensive and complete drone battery health management.

Description

Technical Field

[0001] The present invention relates to the field of drone technology, and more particularly to a drone battery health management system and method based on a passive readable and writable RFID tag. Background Art

[0002] Currently, electric vehicle battery health management combines the health management of the charger's charging and discharging processes with the health management of the usage process to achieve excellent health management results. However, drone batteries require particularly high energy density and are generally composed of several batteries connected in series. In addition, to save weight, the battery itself does not have its own charge and discharge control system. Therefore, most mature battery health management technologies similar to those for electric vehicles are not suitable for drone batteries.

[0003] Although there has been some research on the health management of drone batteries, the existing health management methods all treat the health management of the charger's charging and discharging process and the health management of the usage process as independent of each other. Obviously, combining the two can achieve better health management effects.

[0004] Therefore, this patent provides a system and method for drone battery health management that combines the health management of the charger's charging and discharging processes with the health management of the battery during use, thereby achieving comprehensive and complete drone battery health management. Its characteristic is that it achieves the above goals while fully controlling the drone's power and hardware load. Summary of the Invention

[0005] In view of this, the present invention provides a UAV battery management system and method based on passive readable and writable RFID tags to solve the technical problems mentioned in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A battery health management system for drones based on passive readable and writable RFID, characterized by comprising: a passive readable and writable RFID tag, an RFID read / write module connected to a charger, a battery health management module of the charger, an RFID read / write module connected to a flight control, and a battery health management module of the flight control;

[0008] The passive readable and writable RFID tag is attached to the drone battery to store the drone battery health indicator;

[0009] The RFID reader / writer module connected to the charger is used to read the drone battery health management indicator in the passive readable and writable RFID tag before charging and discharging, and is also used to write the drone battery health management indicator into the passive readable and writable RFID tag after charging is completed;

[0010] The battery health management module of the charger is used to formulate a charging and discharging strategy based on the drone battery health management indicators in the passive readable and writable RFID tag before charging and discharging, and is used to record the voltage and current of each battery and the charging and discharging time during the charging process, and record the data in a log file; it is also used to calculate the battery health indicators after charging is completed, and write the battery health indicators into the passive readable and writable RFID tag through the RFID reader / writer module connected to the charger;

[0011] The RFID read / write module connected to the flight control is used to read the drone battery health management indicators stored in the passive readable and writable RFID tag before the flight, and is also used to write the drone battery health management indicators after the flight into the passive readable and writable RFID tag;

[0012] The battery health management module of the flight control is used to calculate the flight time of the drone battery based on the drone battery health management index stored in the passive readable and writable RFID tag before the flight, to record the discharge data of the drone battery during the flight and record it in a log file, and to calculate the battery health index after the flight and write it into the passive readable and writable RFID tag through the RFID read-write module connected to the flight control.

[0013] The health indicators of RFID storage are specified based on a coding table.

[0014] The passive readable and writable RFID tag is attached to the drone battery and does not need to be connected to any power source.

[0015] It can be seen from the above technical solution that compared with the existing technology, the present invention discloses a drone battery health management system and method based on passive readable and writable RFID tags. RFID reading and writing hardware devices are installed on the drone battery charger and the drone flight control system respectively to read and write RFID. The battery health management module of the charger and the battery health management module of the flight control perform business logic calculations on battery health management indicators, store data in logs, and drive the RFID reading and writing module to read and write RFID, thereby jointly realizing comprehensive and complete drone battery health management. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1The accompanying figure is a schematic diagram of the structure of the drone battery health management system provided by the present invention;

[0018] Figure 2 The accompanying figure is a schematic diagram of the position of the passive read-write RFID tag provided by the present invention;

[0019] Figure 3 The accompanying drawing is a schematic diagram of the connection of the battery management module of the charger provided by the present invention;

[0020] Figure 4 The accompanying drawing is a schematic diagram of the connection of the RFID reader / writer module connected to the flight control provided by the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The embodiment of the present invention discloses a drone battery health management system based on a passive readable and writable RFID tag. Figure 1 As shown, it includes: a passive readable and writable RFID tag, an RFID read-write module connected to the charger, a battery health management module of the charger, an RFID read-write module connected to the flight control, and a battery health management module of the flight control.

[0023] Passive read-write RFID tags, such as Figure 2 As shown, it is attached to the drone battery to store the drone battery health indicator.

[0024] In actual applications, battery health indicators include the number of charge and discharge cycles, the health of each battery, etc., which can be set by battery manufacturers.

[0025] In this embodiment, the following alternative RFID chips can be used:

[0026] chip Total capacity User data protocol Operating frequency NTAG213 180 bytes 144 bytes 14443A 13.56MHz NTAG125 540 bytes 504 bytes 14443A 13.56MHz NTAG126 926 bytes 888byte 14443A 13.56MHz

[0027] The health indicators of drone batteries can be stored as user data in the chip. Even a minimum of 144btye of data is sufficient. Currently, these chips can be read and written 100,000 times and the data can be stored for 10 years, which meets the needs.

[0028] Connect to the charger's RFID reader / writer module, such as Figure 3The device is a piece of RFID reader / writer hardware that can read and write drone battery health indicators from passive, readable and writable RFID tags before charging or discharging, and writes these indicators to passive, readable and writable RFID tags after charging. Currently, RFID reader / writer technology is highly mature, such as the ST25R3916: a high-performance universal NFC device and EMVCo reader / writer that can meet these requirements.

[0029] The charger's battery health management module is a plug-in for the charger firmware or a module integrated into the charger firmware. It is used to formulate charging and discharging strategies based on the drone's battery health management indicators in the passive readable and writable RFID tag before charging and discharging. It is used to record the voltage and current of each battery as well as the charging and discharging time during the charging process and record the data in a log file. It is also used to calculate the battery health indicators after charging is completed and write the battery health indicators into the passive readable and writable RFID tag through the RFID read-write module connected to the charger, overwriting the old battery health indicators.

[0030] In this embodiment, the calculation method is a general technology and is a public and open technical method in the field of battery health management. The charger firmware also has many open source implementations that can be implemented by general developers.

[0031] Connect to the flight control's RFID reader / writer module, such as Figure 4 , is a hardware that can read and write RFID, such as Figure 4 As shown, it is used to read the drone battery health management indicators after charging and discharging are completed, and is also used to write the drone battery health management indicators after the flight into a passive readable and writable RFID tag; this part can be implemented using the same hardware module as the RFID read-write module connected to the charger. Since the current RFID read-write module can be miniaturized and lightweight, it will not cause a weight burden on the drone and can be implemented.

[0032] The battery health management module of the flight control is used to calculate the battery life of the drone based on the drone battery health management indicators after charging and discharging. When the drone is flying, it records the discharge data of the drone battery in real time and calculates the drone battery health management indicators in real time during the flight. After the flight, the updated drone battery health indicators are written to the read-write RFID tag through the RFID read-write module connected to the flight control.

[0033] In this embodiment, this can be achieved by developing a plug-in for the UAV flight control. If the open source flight control PX4 supports plug-in technology, general technicians can develop a plug-in for this function.

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0035] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drone battery health management system based on passive readable and writable RFID tags, characterized by: include: Passive readable and writable RFID tag, RFID reader / writer module connected to the charger, battery health management module of the charger, RFID reader / writer module connected to the flight controller, and battery health management module of the flight controller; The passive readable and writable RFID tag is attached to the drone battery to store the drone battery health indicator; The RFID reader / writer module connected to the charger is used to read the drone battery health management indicator in the passive readable and writable RFID tag before charging and discharging, and is also used to write the drone battery health management indicator into the passive readable and writable RFID tag after charging is completed; The battery health management module of the charger is a plug-in of the charger firmware or a module integrated into the charger firmware, and is used to formulate a charging and discharging strategy based on the drone battery health management indicators in the passive readable and writable RFID tag before charging and discharging, and is used to record the voltage and current of each battery and the charging and discharging time during the charging process, and record the data in a log file; it is also used to calculate the battery health indicator after charging is completed, and write the battery health indicator into the passive readable and writable RFID tag through the RFID reader / writer module connected to the charger, overwriting the old battery health indicator; The RFID read / write module connected to the flight control is used to read the drone battery health management indicators stored in the passive readable and writable RFID tag before the flight, and is also used to write the drone battery health management indicators after the flight into the passive readable and writable RFID tag; The battery health management module of the flight control is implemented by developing a plug-in for the UAV flight control, and is used to calculate the flight time of the UAV battery based on the UAV battery health management index stored in the passive readable and writable RFID tag before the flight, and is used to record the discharge data of the UAV battery during the flight and record it in a log file. It is also used to calculate the battery health index after the flight and write it into the passive readable and writable RFID tag through the RFID read-write module connected to the flight control.

2. The UAV battery health management system based on passive readable and writable RFID tags according to claim 1 is characterized in that: It also includes a coding table, and the health indicators stored in the RFID are formulated based on the coding table.

3. The UAV battery health management system based on passive readable and writable RFID tags according to claim 1 is characterized in that: The passive readable and writable RFID tag is attached to the drone battery and does not need to be connected to any power source.

4. A method for managing drone battery health based on passive readable and writable RFID tags, characterized in that: A drone battery health management system based on a passive readable and writable RFID tag according to any one of claims 1 to 3 comprises the following steps: S1. Read the drone battery health management indicators in the passive read-write RFID tag before charging and discharging and formulate a charging and discharging strategy; S2. Record the voltage and current of each battery during the charging process, as well as the charge and discharge time, and log the data into a log file. Calculate the health index of the drone battery after charging and discharging and write it to the passive read-write RFID tag. S3. Read the drone battery health management indicators stored in the passive read-write RFID tag before the flight and calculate the drone battery life; S4. Record the charge and discharge data of the drone battery during flight and calculate the drone battery health index in real time during flight and record it in a log file; S5. After the flight, the battery health indicator is calculated and written into the passive readable and writable RFID tag.

5. The method for managing drone battery health based on a passive readable and writable RFID tag according to claim 4 is characterized in that: It also includes formulating a health indicator coding table. Due to the limited storage space of RFID, the drone battery health indicator is encoded according to the coding table and then written into the passive readable and writable RFID tag.

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