WO2018171495A1

WO2018171495A1 - Battery management system and flight control system and aircraft having same

Info

Publication number: WO2018171495A1
Application number: PCT/CN2018/079094
Authority: WO
Inventors: 胡华智; 肖熙吉; 邓龙辉
Original assignee: 亿航智能设备（广州）有限公司
Priority date: 2017-03-20
Filing date: 2018-03-15
Publication date: 2018-09-27
Also published as: CN107452989A

Abstract

A battery management system comprises a battery cell module, a battery management chip, a main control chip and a charging/discharging MOS. The battery management chip is for monitoring current, voltage and temperature data of the battery cell module, calculates electricity amount, capacity and health information of the battery cell module according to the current, voltage and temperature data, and controls turning on and turning off of the charging/discharging MOS according to the current, voltage and temperature data, the electricity amount, capacity and health information, and configured parameters. The main control chip reads the current, voltage and temperature data, the electricity amount, capacity and health information, and an on/off status of the charging/discharging MOS, reports the same to an aircraft or a charger, at the same time receives an instruction from the aircraft or the charger, and controls the chip management chip according to the received instruction. The determination of whether the battery cell module is to be charged or discharged can be controlled through the on/off status of the charging/discharging MOS. The system assists a flight control system to control and optimize a power supply according to the status of the power supply, thus realizing battery management.

Description

Battery management system and flight control system and aircraft therewith

[0001] The present application relates to the field of aircraft technology, and relates to an auxiliary system for an aircraft, and in particular to a battery management system and a flight control system and an aircraft having the battery management system.

Background technique

[0002] An unmanned aerial vehicle, referred to as a drone, is a rapidly developing flying device that has the advantages of mobility, rapid response, unmanned flight, and low operational requirements. UAVs are equipped with a variety of sensors to achieve real-world image transmission and high-risk area detection. They are a powerful complement to satellite remote sensing and traditional aerial remote sensing. At present, the scope of use of drones has expanded to three major areas of military, scientific research and civil use, specifically in power, communications, meteorology, agriculture, oceanography, exploration, photography, disaster prevention and mitigation, crop yield estimation, anti-drug, border patrol, law and order. The field of anti-terrorism and other fields are widely used.

[0003] For UAVs to achieve flight and control, batteries must be used. The battery is used to power the electrical components of the unmanned aerial vehicle. In order to ensure flight safety and effective control, the state of the battery must be detected and monitored, and the battery state can be effectively controlled according to the state of the battery, thereby optimizing the battery. However, the existing UAVs do not have a good battery management system, or have a battery management system. However, the battery management system has a low management capability, and it is impossible to achieve optimal operation and good control of the battery. demand.

In view of the above drawbacks of the prior art, a new type of battery management system is urgently needed.

technical problem

Problem solution

Technical solution

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and to provide a battery management system to solve the problem that current batteries of an aircraft are difficult to obtain good optimized operation and control.

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

[0007] A battery management system including a battery module, a battery management chip, a main control chip, and a charge and discharge MOS The battery management chip is configured to monitor current, voltage, and temperature data of the battery module, and calculate power, capacity, and health information of the battery module according to the current, voltage, and temperature data. Simultaneously controlling the snoring and closing of the charge and discharge MOS according to the current, voltage and temperature data, the power, capacity and health information and the set parameters; the main control chip is configured to read the current and voltage And temperature data, the amount of power, capacity and health information, and the state of charge of the charge and discharge MOS, and reporting it to the aircraft or charger, simultaneously receiving commands from the aircraft or the charger and according to the received command pair The power management chip performs control; whether the battery module is charged or discharged can be controlled by the switching state of the charge and discharge MOS.

Further, wherein the battery management chip, the main control chip, and the charge and discharge MOS are integrated on one circuit board.

[0009] Further, wherein the cell module comprises a plurality of cells.

[0010] Further, wherein a detection resistor is connected in series on the main circuit of the circuit board, and current data of the battery module is calculated by measuring a voltage across the detection resistor.

[0011] Further, wherein a surface of the cell module is attached with a thermistor, and temperature data of the cell module is calculated by measuring a resistance value of the thermistor.

[0012] Further, wherein each of the cells is connected to the battery management chip through a wire, so that the battery management chip can measure the voltage of each cell and the battery cell The total voltage of the module.

[0013] In another aspect, the battery management system further includes a button connected to the main control chip, and the main control chip can acquire an operation of the user by using the button.

[0014] Further, the battery management system further includes an LED indicator light connected to the main control chip, wherein the LED indicator is used to indicate the state of the battery module.

Further, the present application also provides a flight control system characterized by having the above battery management system.

Moreover, the present application also provides an aircraft characterized by having the above battery management system.

[0017] The present application also provides an aircraft characterized by having the flight control system described above.

[0018] Further, wherein the aircraft is a drone.

Advantageous effects of the invention

Beneficial effect [0019] It can detect and monitor the current, voltage and temperature of the battery, and can calculate the power, capacity and health of the battery according to the current, voltage and temperature data of the battery, thereby facilitating the optimal operation of the battery and Good control.

Brief description of the drawing

DRAWINGS

1 is a schematic view showing the configuration of a battery management system of the present application.

Embodiments of the invention

[0021] The present application is further described in conjunction with the accompanying drawings and embodiments, and the contents of the embodiments are not to be construed as limiting the scope of the application.

[0022] The present application relates to a battery management system. The battery management system is configured to collect information such as voltage, current, and temperature of the power source, and implement real-time monitoring of information such as voltage, current, and temperature of the power source, and the aircraft (substantially the flight control system of the aircraft) or the charger. Waiting for data exchange, so that the aircraft (essentially the flight control system of the aircraft) or the charger obtains the upload information of the battery management system, that is, the voltage, current and temperature of the power source, and performs logical judgment, according to logic As a result, a control command is formed, and the control command is sent to the battery management system to cause the battery management system to perform a corresponding action to achieve optimal control of the power source.

1 is a block diagram showing the configuration of a battery management system of the present application. As shown in FIG. 1, the battery management system of the present application includes a battery module, a battery management chip, a main control chip, and a charge and discharge MOS. Further, in the present application, preferably, the battery management chip, the main control chip, and the charge and discharge MOS are integrated on one circuit board. In this way, it helps to increase its integration and reduce its volume.

[0024] wherein the battery module comprises a plurality of cells. The formation of the cell module by a plurality of cells helps to increase the power that the cell module can provide, thereby meeting the power requirements of the aircraft.

[0025] the battery management chip is configured to monitor current, voltage, and temperature data of the battery module and calculate power and capacity of the battery module according to the current, voltage, and temperature data (capacity of the battery module) And the health information, and the electric quantity, the capacity and the health information, and the set parameters control the snoring and closing of the charging and discharging MOS according to the current, voltage and temperature data. [0026] In the present application, calculating the amount of power, capacity, and health information of the battery module according to the current, voltage, and temperature data is: first, measuring the battery module by experiment, and obtaining the The relationship between the circuit voltage, temperature and power of the battery module, and the relationship between the power and the internal resistance of the battery module. Then, the experimentally obtained data is written into the flash of the battery management chip. The data of the internal resistance of the battery module is obtained by using the 吋 query table, and the circuit voltage of the battery module is calculated according to the internal resistance, current and voltage of the battery module. Finally, the power is calculated by looking up the table and using the relationship between the voltage, temperature and power of the cell module.

[0027] In the present application, in the present application, the set parameters include protection parameters (over-discharge protection, over-charge protection, charging over-current, discharge over-current, overload protection, charging short-circuit, discharge short-circuit, charging over-temperature, charging) Under temperature, discharge over temperature, discharge under temperature), including the charge and discharge MOS control commands (such as FETEN, PCHG TEST, CHGTEST, DSGTEST).

[0028] In the present application, in particular, in order to detect the current of the cell module, a sense resistor is connected in series on the main circuit of the circuit board. Wherein the detecting resistor is connected in series between the negative pole of the battery module and the battery output negative pole. The current data of the cell module can be calculated by measuring the voltage across the sense resistor, such as the resistance value and the voltage value.

[0029] In the same manner, in order to detect the voltage of the battery module, each of the batteries is connected to the battery management chip through a wire, so that the battery management chip can automatically measure the electricity of each section. The voltage of the core, and the total voltage of the cell module is calculated from the voltage of each cell. In the present application, the battery management chip has an integrated analog-to-digital converter (analog circuit to digital circuit converter) therein, by measuring the voltage of each line connecting the battery cell and the battery management chip And through the analog-to-digital converter, it can be converted into a voltage value.

[0030] Also, in order to detect the temperature of the cell module, a thermistor is attached to the surface of the cell module. By measuring the resistance of the thermistor, the temperature data of the cell module can be calculated.

[0031] The main control chip is configured to read the current, voltage and temperature data, the electric quantity, the capacity and the health information, and the state of the charge and discharge MOS, and report it to the aircraft or the charger. The aircraft (actually the flight control system of the aircraft) or the charger (the charger can be installed with the controller) can make logical judgments according to the obtained data, information and customs conditions, and determine the result according to the logic. And forming a control command, and sending the control command to the main control chip, and implementing control of the entire battery management system by using the main control chip.

[0032] In the present application, the forming a control command according to the logical judgment result is embodied in the control of the aircraft. For example, if the battery temperature is too high or too low, the battery is overloaded, the battery is low, the voltage is low, the cell voltage is too low, and the cell voltage difference is large, etc., the aircraft will return or emergency landing.

[0033] In the present application, preferably, the battery management system further includes a button connected to the main control chip. The master chip can acquire the operation of the user through the button. In this way, the user can enter the control command by pressing the key to better optimize the operation of the battery.

More preferably, the battery management system further includes an LED indicator light connected to the main control chip.

The LED indicator is used to indicate the state of the battery module, such as charging or discharging, whether the power is high or low, etc., so that the user can intuitively obtain the state of the battery module.

[0035] Whether the cell module is charged or discharged can be controlled by the off state of the charge and discharge MOS.

Whether or not the cell module can be charged or discharged can be achieved by the switching of the charge and discharge MOS. That is, charging or discharging of the cell module can be realized only when the charge and discharge MOS is in an on state. When the charge and discharge MOS is in a non-conducting state, the battery module cannot be charged or discharged.

[0036] The battery management system of the present application can detect and monitor the current, voltage, temperature, and the like of the battery, and can calculate the power, capacity, and health information of the battery according to the current, voltage, and temperature data of the battery.

, thus facilitating optimal operation and good control of the battery.

[0037] Of course, in the present application, a flight control system having the above battery management system is also claimed. As long as the flight control system adopts the above battery management system, it falls within the scope of protection of the present application.

[0038] Also, in the present application, an aircraft having the above battery management system or the above flight control system, particularly a drone, is also claimed. As long as the aircraft uses the above battery management system or flight control system

, all fall within the scope of this application.

[0039] The above-described embodiments of the present application are merely illustrative of the present invention and are not intended to limit the embodiments of the present application. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. It is not possible to exhaust all implementations here. Any obvious changes or changes that extend to the technical solution of the present application are still in the present application. Please be aware of the scope of protection.

Claims

Claim

A battery management system includes a battery module, a battery management chip, a main control chip, and a charge and discharge MOS, wherein the battery management chip is configured to monitor current, voltage, and temperature data of the battery module according to The current, voltage, and temperature data calculates power, capacity, and health information of the battery module, and based on the current, voltage, and temperature data, the power, capacity, and health information, and the set parameters are controlled. The snagging and closing of the charge and discharge MOS; the main control chip is configured to read the current, voltage and temperature data, the power, capacity and health information, and the state of the charge and discharge MOS, and report the same Giving the aircraft or the charger, receiving the command from the aircraft or the charger, and controlling the power management chip according to the received command; controlling whether the battery module is performed by the state of the charge/discharge MOS Charge or discharge. The battery management system according to claim 1, wherein said battery management chip, main control chip, and charge and discharge MOS are integrated on a circuit board.

The battery management system according to claim 2, wherein said cell module comprises a plurality of cells.

The battery management system according to claim 3, wherein a detecting resistor is connected in series to the main circuit of the circuit board, and current data of the battery module is calculated by measuring a voltage across the detecting resistor.

The battery management system according to claim 4, wherein a surface of the battery module is attached with a thermistor, and temperature data of the battery module is calculated by measuring a resistance value of the thermistor. .

The battery management system according to claim 5, wherein each of said cells is connected to said battery management chip through a wire, so that said battery management chip can measure the voltage of said cells in each section And the total voltage of the battery module.

A battery management system according to any one of claims 1 to 6, characterized by further comprising a button connected to said master chip, said master chip being capable of acquiring a user operation by said button.

The battery management system according to claim 7, further comprising The LED indicator connected to the main control chip is used to indicate the state of the battery module.

[Claim 9] A flight control system comprising the battery management system according to any one of claims 1-8.

[Claim 10] An aircraft comprising the battery management system according to any one of claims 1-8.

[Aspect 11] An aircraft comprising the flight control system of claim 9.

[Claim 12] The aircraft according to claim 10 or 11, wherein the aircraft is an unmanned aerial vehicle.