CN109075593B

CN109075593B - Power-on slow start device, battery assembly, unmanned aerial vehicle and method

Info

Publication number: CN109075593B
Application number: CN201780026838.XA
Authority: CN
Inventors: 张文康
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2017-12-20
Filing date: 2017-12-20
Publication date: 2022-07-12
Anticipated expiration: 2037-12-20
Also published as: CN109075593A; WO2019119291A1

Abstract

A power-on slow start device comprising: a switch circuit and a processing unit connected with the switch circuit. The switching circuit and the processing unit are used for being connected to the homopolar terminals of the battery and the load, and the initial state of the switching circuit is an off state. And when the processing unit compares that the voltage of the homopolar terminals of the battery and the load is less than or equal to a first preset threshold value, the processing unit controls the switching circuit to be switched on after delaying for preset time, so that the battery supplies power to the load. In the in-service use, realized the slow start to the load to the unmanned aerial vehicle power supply to discharge the phenomenon of striking sparks has been avoided. The battery pack, the unmanned aerial vehicle and the power-on slow start method are further related.

Description

Power-on slow start device, battery assembly, unmanned aerial vehicle and method

Technical Field

The invention relates to the technical field of circuits, in particular to a power-on slow start device, a battery pack, an unmanned aerial vehicle and a method.

Background

Most of heavy unmanned aerial vehicles (with takeoff weight more than or equal to 20kg) mostly adopt batteries with large voltage and high capacity, and the discharge current of the batteries is huge and is generally close to hundreds of amperes. Consequently, the required battery of unmanned aerial vehicle has the characteristic of high-pressure heavy current for the battery majority adopts non-intelligent battery, can't carry out switch function, causes the battery to be electrified for a long time, and when battery access unmanned aerial vehicle, the scene of hot plug easily appears like this.

When the battery terminal is close unmanned aerial vehicle's bus bar terminal, because unmanned aerial vehicle (load end) internal circuit system has a large amount of electric capacity for input impedance is close to for zero, and the battery terminal carries the high pressure, will take place the air discharge phenomenon this moment at the contact moment. The air discharge phenomenon has a large discharge current, and the instantaneous power burns the battery terminal to cause oxidation or melting. And after many times of plugging and unplugging, the contact resistance can be obviously increased, poor contact is caused, and the risk of air power failure or spontaneous combustion is caused.

At present, the battery terminal can adopt a cross-shaped spark elastic structure anti-ignition plug with a male head, and an anti-ignition resistor can be arranged on an outer ring of the battery terminal, so that the ignition phenomenon is avoided. However, after the sparking plug is repeatedly inserted and pulled, the resilience of the cross-shaped elastic structure is reduced, and the repeatedly contacted position is easily fallen out of the sparking ring, so that the sparking phenomenon is caused.

Disclosure of Invention

The invention provides a power-on slow start device, a battery assembly, an unmanned aerial vehicle and a method, which are used for solving the problems that the rebound resilience is reduced in the repeated plugging and unplugging process of the conventional anti-sparking plug, and the sparking phenomenon is caused because the repeated contact position easily falls out of an anti-sparking ring.

In a first aspect, the present invention provides a power-on slow start device, including: the processing unit is connected with the switching circuit;

the switching circuit and the processing unit are used for being connected to the homopolar terminals of a battery and a load, and the initial state of the switching circuit is an off state;

and the processing unit controls the switching circuit to be switched on after delaying for preset time when the comparison result shows that the homopolar terminal voltage of the battery and the load is less than or equal to a first preset threshold value, so that the battery supplies power to the load.

In a second aspect, the present invention provides a battery assembly comprising: a battery and a power-on slow start device;

the first input end of the power-on slow start device is connected with the positive end of the battery, the first output end of the power-on slow start device is used for being connected with the positive end of a load, the second input end of the power-on slow start device is connected with the negative end of the battery, the second output end of the power-on slow start device is used for being connected with the negative end of the load, and the initial state of the power-on slow start device is a disconnection state;

and when the power-on slow starting device is connected with the load and the voltage of the battery and the voltage of the load at the same pole is determined to be less than or equal to a first preset threshold value, the power-on slow starting device is conducted after delaying for a preset time, and the power-on slow starting device is used for enabling the battery to supply power to the load.

In a third aspect, the present invention provides an unmanned aerial vehicle, comprising a body, and a battery installed on the body, wherein the unmanned aerial vehicle further comprises: the power-on slow starting device is arranged on the machine body;

the first output end of the power-on slow start device is connected with the positive end of the unmanned aerial vehicle, the first input end of the power-on slow start device is used for connecting the positive end of a battery, the second output end of the power-on slow start device is connected with the negative end of the unmanned aerial vehicle, the second input end of the power-on slow start device is used for connecting the negative end of the battery, and the initial state of the power-on slow start device is a disconnection state;

when the power-on slow starting device is connected with the battery and determines that the voltage of the battery and the voltage of the homopolar terminal of the unmanned aerial vehicle is smaller than or equal to a first preset threshold value, the power-on slow starting device is conducted after delaying for a preset time, and the power is supplied to the unmanned aerial vehicle by the battery.

In a fourth aspect, the present invention provides a power-on slow start method, including:

the method comprises the steps that a power-on slow starting device obtains the voltages of the same poles of a battery and a load, wherein the initial state of the power-on slow starting device is a disconnection state;

the power-on slow start device judges whether the voltage of the homopolar terminal is less than or equal to a first preset threshold value;

if yes, the power-on slow start device is conducted after delaying preset time, and the power-on slow start device is used for enabling the battery to supply power to the load.

According to the power-on slow start device, the battery assembly, the unmanned aerial vehicle and the method, the device is connected to the homopolar ends of the battery and the load through the switch circuit, the initial state of the switch circuit is a disconnected state, and the battery and the load can be in the disconnected state when being connected. The processing unit is connected to the homopolar ends of the battery and the load, so that the battery can slowly charge the capacitor of the load through the processing unit, when the processing unit compares that the homopolar end voltage of the battery and the load is less than or equal to a first preset threshold value, the load is in a low-resistance state, the load meets the requirement of large current, the processing unit can control the switching circuit to be switched on after delaying preset time, the reliable connection between the battery and the load is ensured, and the battery can supply power to the load. The invention solves the problem that the traditional ignition prevention measures can not completely prevent the ignition phenomenon, realizes the process of slowly starting the battery to supply power to the load, and avoids the ignition phenomenon of the battery and the load, thereby eliminating the risk of fire caused under the flammable and explosive environment, prolonging the service life of a battery connector, and preventing the safety performance of the load from being influenced by the high contact impedance caused by ignition oxidation.

Drawings

Fig. 1 is a first schematic structural diagram of a power-on slow start device provided in the present invention;

fig. 2 is a schematic structural diagram of a power-on slow start device according to the present invention;

fig. 3 is a schematic structural diagram three of the power-on slow start device provided in the present invention;

FIG. 4 is a circuit diagram of a first voltage comparison circuit according to the present invention;

FIG. 5 is a schematic circuit diagram of a slow start delay circuit according to the present invention;

FIG. 6 is a circuit diagram of a first level shifter circuit according to the present invention;

fig. 7A is a schematic structural diagram of a power-on slow start device according to a fourth embodiment of the present invention;

fig. 7B is a schematic structural diagram of a power-on slow start device according to a fifth embodiment of the present invention;

fig. 8 is a sixth schematic structural diagram of the power-on slow start device provided in the present invention;

FIG. 9 is a circuit diagram of a second level shifter circuit according to the present invention;

fig. 10 is a seventh schematic structural diagram of the power-on slow start device provided in the present invention;

fig. 11 is a schematic structural diagram eight of the power-on slow start device provided in the present invention;

FIG. 12 is a circuit diagram of a third level shifter circuit according to the present invention;

fig. 13 is a schematic structural diagram nine of a power-on slow start device provided in the present invention;

fig. 14 is a schematic structural view of a battery pack according to the present invention;

fig. 15 is a schematic structural diagram of the unmanned aerial vehicle provided in the present invention;

fig. 16 is a first flowchart illustrating a power-on slow start method according to the present invention;

FIG. 17 is a second flowchart illustrating a power-on slow start method according to the present invention;

fig. 18 is a third schematic flow chart of the power-on slow start method provided in the present invention.

Detailed Description

At present, battery terminal adopts the plug of preventing striking sparks of cross flower elastic construction of public head, except because the resilience performance of its battery terminal is easily worsened, and easily falls to the position of preventing with unmanned aerial vehicle and prevent striking sparks the circle and cause the phenomenon of striking sparks outward, long-term operation in-process, the resistance of preventing striking sparks that is equipped with on the battery is because of receiving plug stress and environmental corrosion's influence, causes the metal terminal firing blacking of preventing the plug of striking sparks, and can be real effect fast, and then loses the function of preventing striking sparks.

Further, the unmanned aerial vehicle prevents the phenomenon of striking sparks through the electric tuning board, but those skilled in the art can understand that the position where the electric capacity is used most inside the unmanned aerial vehicle is the electric tuning board. The electric adjusting plate can only slowly start 1 to 2 large electrolytic capacitors in the electric adjusting plate due to the characteristics of the electric adjusting plate, and although capacitance values of other capacitors are all several microfarads, the other capacitors have high input voltage and large parallel connection quantity, and can still bring hundreds of amperes of impact current, so that the ignition phenomenon is caused.

To sum up, whatever kind of above-mentioned measure of preventing striking sparks can not solve the phenomenon of striking sparks totally, consequently, slowly starting drive comes the process of delay starting battery to unmanned aerial vehicle power supply through setting up in this embodiment. Next, a specific implementation structure of the power-on slow start device in the present embodiment will be described in detail with reference to fig. 1.

Fig. 1 is a schematic structural diagram of a power-on slow start device provided in the present invention, as shown in fig. 1, the power-on slow start device of this embodiment may include: a switch circuit and a processing unit connected with the switch circuit. The switching circuit and the processing unit are used for being connected to the homopolar terminals of the battery and the load, and the initial state of the switching circuit is an off state. And when the processing unit compares that the voltage of the homopolar terminals of the battery and the load is less than or equal to a first preset threshold value, the processing unit controls the switching circuit to be switched on after delaying for preset time, so that the battery supplies power to the load.

Specifically, in this embodiment, the battery has a positive electrode and a negative electrode, and the load can be equivalent to a parallel connection of a load capacitor and a load resistor, where the load capacitor has a positive electrode and a negative electrode, and therefore, the same terminals of the battery and the load in this embodiment refer to the positive terminal of the battery and the positive terminal of the load capacitor, or the negative terminal of the battery and the negative terminal of the load capacitor.

Further, since the switch circuit is connected to the same pole of the battery and the load, in this embodiment, the switch circuit may be connected to the positive terminal of the battery and the positive terminal of the load capacitor respectively, or may be connected to the negative terminal of the battery and the negative terminal of the load capacitor respectively, which is not limited in this embodiment. Since the processing unit is connected to the same terminals of the battery and the load, the processing unit may be connected to the positive terminal of the battery and the positive terminal of the load capacitor, or may be connected to the negative terminal of the battery and the negative terminal of the load capacitor, which is not limited in this embodiment. For convenience of illustration, the switch circuit and the processing unit are respectively connected to different peers of the battery and the load in this embodiment.

Further, when the battery is connected with the load, because the voltage at the two ends of the load capacitor does not suddenly change, the voltage at the positive electrode end of the load capacitor and the voltage at the load end are both the battery voltage, and the contact impedance is close to zero, so that the air can be discharged instantly, and the ignition phenomenon can occur. In this embodiment, because the initial state of the switch circuit is the off state, when the switch circuit is connected to the same-stage terminals of the battery and the load, the switch circuit can disconnect the path between the battery and the load, so that the battery cannot supply power to the load, and further the battery and the load are protected. The embodiment does not limit the specific implementation form of the switch circuit.

Furthermore, the processing unit may be connected to the same terminal of the battery and the load, so that the battery can slowly charge the load capacitor after passing through the processing unit, and the time for connecting the battery and the load is prolonged. And the processing unit can also acquire the terminal voltages at the same level of the battery and the load at any moment, and judge whether the battery and the load can be connected at the moment by comparing the terminal voltages at the same level with the first preset threshold voltage, so that the phenomenon of sparking between the voltage and the load is prevented. The embodiment does not limit the specific implementation form of the processing unit. In addition, the first preset threshold may be determined according to the quiescent current of the processing unit and the battery voltage in this embodiment, which is not limited in this embodiment. Typically, the first predetermined threshold may be between 10V and 15V.

Further, the processing unit in this embodiment can control the state of the switch circuit by being connected to the switch circuit. When the processing unit determines that the terminal voltage at the same level is less than or equal to the first preset threshold, the state of the switching circuit can be changed into a conducting state, so that a path between the battery and the load is conducted, and the battery starts to supply power to the load.

The power-on slow start device provided by the embodiment is connected to the homopolar ends of the battery and the load through the switch circuit, and the initial state of the switch circuit is a disconnected state, so that the battery is disconnected when being connected with the load. The processing unit is connected to the homopolar ends of the battery and the load, so that the battery can slowly charge the capacitor of the load through the processing unit, when the processing unit compares that the homopolar end voltage of the battery and the load is less than or equal to a first preset threshold value, the load is in a low-resistance state, the load meets the requirement of large current, the processing unit can control the switching circuit to be switched on after delaying preset time, the reliable connection between the battery and the load is ensured, and the battery can supply power to the load. The problem of current measure of preventing striking sparks can't be prevented completely to this embodiment has been solved, has realized the power supply process of slow start battery to the load, has avoided the phenomenon of striking sparks of battery and load to eliminate the risk that arouses the conflagration under inflammable and explosive environment, not only can prolong the life-span of battery connector, can also prevent to uprise and influence the security performance of load because the contact impedance who brings because the oxidation of striking sparks.

On the basis of the above embodiments, a specific implementation structure of the power-on slow start device in the present embodiment will be described in detail.

First, fig. 2 is a schematic structural diagram of a power-on slow start device provided in the present invention, and as shown in fig. 2, the processing unit of this embodiment includes: a first resistor and a comparison delay circuit. The two ends of the first resistor are used for being connected with homopolar ends of a battery and a load, the comparison delay circuit is connected with the first resistor in parallel, and the comparison delay circuit obtains voltages at the two ends of the first resistor.

And when the comparison delay circuit compares that the voltage at the two ends of the first resistor is less than or equal to a first preset threshold value, the switch circuit is controlled to be switched on after delaying for preset time, so that the battery supplies power to the load.

Specifically, when the first resistor is connected with the same-level end of the battery and the load, the battery can slowly charge the load capacitor through the first resistor, and the sparking phenomenon is prevented. The present embodiment does not limit the specific type, the specific number and the resistance of the first resistor. Optionally, the first resistance is an anti-surge resistance. Typically the first resistance may take the value of 10 ohms.

Further, since the processing unit needs to obtain the voltages at the same level of the battery and the load, and the first resistor can be connected to the same level of the battery and the load, in this embodiment, the comparison delay circuit can obtain the voltage at both ends of the first resistor through the connection with the first resistor, and the voltage at both ends of the first resistor can be used as the voltage at the same level of the battery and the load.

Furthermore, the comparison delay circuit compares the voltages at the two ends of the first resistor with a first preset threshold, and when the voltage at the two ends of the first resistor is not more than the first preset threshold, the comparison delay circuit delays for a preset time, and after stable connection between the battery and the load is ensured, the state of the switch circuit is changed, so that the switch circuit is switched on, and the battery can supply power to the load. The preset time in this embodiment may be considered comprehensively according to the time for the battery and the load to be connected stably and the time for the load to be discharged quickly, which is not limited in this embodiment. A typical preset time may be selected to be 500 milliseconds. The specific implementation manner of the comparison delay circuit in this embodiment includes various ways, which is not limited in this embodiment.

Optionally, fig. 3 is a schematic structural diagram of a third power-on slow start device provided in the present invention, and as shown in fig. 3, the comparison delay circuit in this embodiment includes: the first voltage comparison circuit and the soft start delay circuit. The first voltage comparison circuit is connected with the first resistor in parallel, and compares the voltage at two ends of the first resistor with a first preset threshold value.

The output end of the first voltage comparison circuit is connected with the input end of the slow start time delay circuit, and the output end of the slow start time delay circuit is connected with the switch circuit.

When the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to a first preset threshold value, the delay circuit is started slowly to transmit and receive a transmission signal sent by the first voltage comparison circuit, and the switch circuit is controlled to be switched on after delaying for a preset time, so that the battery supplies power to the load.

Specifically, in this embodiment, the comparison delay circuit can not only obtain the voltages at the two ends of the first resistor, compare the voltages at the two ends of the first resistor with the first preset threshold, but also control the state of the switch circuit after delaying the preset time. Therefore, the present embodiment can be divided into the first voltage comparing circuit and the soft start delay circuit according to the functions performed by the comparison delay circuit.

Further, in this embodiment, the first voltage comparison circuit is connected to the first resistor in parallel, so as to obtain the voltages at the two ends of the first resistor, thereby completing the comparison process between the voltages at the two ends of the first resistor and the first preset threshold. And the output end of the first voltage comparison circuit is connected with the slow start delay circuit, so that the comparison result can be sent to the slow start delay circuit, after the slow start delay circuit delays for a preset time, the state of the switch circuit is changed, the switch circuit is switched on, a path between the battery and the load is switched on, and the process that the battery is safely connected with the load and supplies power to the load is realized. In this embodiment, the specific implementation form of the first voltage comparison circuit and the soft start delay circuit is not limited.

Optionally, fig. 4 is a circuit schematic diagram of the first voltage comparison circuit provided by the present invention, and as shown in fig. 4, the first voltage comparison circuit in this embodiment includes: the second resistor, the third resistor and the second switch tube. The input end of the second switch tube is connected with one end of the first resistor, the control end of the second switch tube, the second resistor and the other end of the first resistor are sequentially connected, the third resistor is connected with the input end and the control end of the second switch tube in parallel, and the output end of the second switch tube is connected with the input end of the slow start delay circuit.

When the voltage at the two ends of the first resistor is smaller than or equal to a first preset threshold value, the output end of the second switch tube sends a transmission signal to the slow start delay circuit, and the slow start delay circuit controls the switch circuit to be switched on after delaying preset time according to the transmission signal so as to enable the battery to supply power to the load.

Specifically, since the voltage across the first resistor decreases gradually, the voltage drop across the first resistor decreases gradually in the present embodiment. In this embodiment, the input end of the second switch tube is connected to one end of the first resistor, so that the voltage at the input end of the second switch tube changes, the other end of the first resistor, the second resistor and the control end of the second switch tube are sequentially connected, the third resistor is connected in parallel to the input end and the control end of the second switch tube, the voltage at the control end of the second switch tube also changes, and the on-off state of the second switch tube can be changed.

Further, when the voltage across the first resistor is less than or equal to the first preset threshold, the second switch tube is turned on. Because the output of second switch tube is connected with the input that delays the start delay circuit, consequently, the second switch tube can be to delaying start delay circuit output transmission signal, delays start delay circuit alright according to transmission signal alright control switch circuit after postponing the default time and switch on for the battery supplies power to the load. In this embodiment, the specific number and the resistance values of the second resistor and the third resistor, and the type and the number of the second switch tubes are not limited.

Optionally, fig. 5 is a schematic circuit diagram of the slow start delay circuit provided in the present invention, and as shown in fig. 5, the slow start delay circuit of this embodiment includes: the first level shift circuit, the fourth resistor, the third switch tube, the first diode and the first capacitor. The first input end of the first level conversion circuit is connected with the first output end of the first voltage comparison circuit, the second input end of the first level conversion circuit is connected with the positive electrode end of the battery, and the output end of the first level conversion circuit, the fourth resistor, the first diode and the switch circuit are sequentially connected.

The control end and the output end of the third switching tube are respectively connected with the anode and the cathode of the first diode, the output end of the third switching tube is also respectively connected with the control ends of the first capacitor and the third switching tube, and the input ends of the first capacitor and the third switching tube are both connected with the ground.

When the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to a first preset threshold value, the first level conversion circuit receives a transmission signal sent by the first voltage comparison circuit, the first level conversion circuit obtains a conducting voltage according to the voltage at the positive electrode of the battery and the transmission signal, and the third switching tube controls the switching circuit to be conducted after delaying for a preset time according to the conducting voltage and is used for enabling the battery to supply power to the load.

Specifically, in this embodiment, the first input terminal of the first level shifter circuit is connected to the first output terminal of the first voltage comparator circuit, so as to receive the transmission signal of the first voltage comparator circuit. And when the first level shift circuit compares that the voltage at the two ends of the first resistor is less than or equal to the first preset threshold, the second input end of the first level shift circuit in this embodiment is connected with the positive terminal of the battery, so that the first level shift circuit can output the conducting voltage capable of conducting the switch circuit according to the voltage at the positive terminal of the battery and the transmission voltage. And before the conduction voltage is transmitted to the switch circuit, because the slow start delay circuit has the function of slow start, the connection of the fourth resistor and the output end of the first level conversion circuit can be ensured, so that the output voltage of the first level conversion circuit cannot be too high, and the time for transmitting the conduction voltage can be delayed.

Furthermore, because the output end of the third switching tube is also connected with the first capacitor and the control end of the third switching tube respectively, and the control end of the third switching tube is connected with the output end of the first level conversion circuit through the fourth resistor, when the first level conversion circuit compares that the voltage at the two ends of the first resistor is greater than the first preset threshold value, the voltage at the control end of the third switching tube is higher than the voltage at the output end of the third switching tube, and the third switching tube is in a reverse cut-off state and cannot be switched on. In addition, the output end voltage of the first level shift circuit and the input end voltage of the switch circuit both generate impact on the slow start delay circuit, so that in this embodiment, one end of the first capacitor is connected to the output end of the third switch tube and the negative electrode of the first diode respectively, and the other end of the first capacitor is connected to ground, so that the output end voltage of the first level shift circuit and the input end voltage of the switch circuit can be quickly released.

Furthermore, because the voltage at the two ends of the first resistor cannot be instantaneously dropped to the first preset threshold, when the voltage at the two ends of the first resistor is greater than the first preset threshold compared by the first voltage comparison circuit, the first voltage comparison circuit sends a transmission signal to the slow start delay circuit, the slow start delay circuit obtains a disconnection voltage according to the transmission signal, and the slow start delay circuit controls the switch circuit to keep a disconnection state.

In this embodiment, there are various specific implementation forms of the first level shift circuit, and this embodiment does not limit this. Optionally, fig. 6 is a circuit schematic diagram of the first level shift circuit provided in the present invention, and as shown in fig. 6, the first level shift circuit of this embodiment includes: the circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, a second diode and a second capacitor. The first output end of the first voltage comparison circuit is connected with the first end of the fifth resistor and the first end of the sixth resistor respectively, the second end of the fifth resistor is further connected with the positive electrode end of the battery, the second end of the sixth resistor is further connected with the ground, and the two ends of the second capacitor are connected with the first output end of the first voltage comparison circuit and the ground in parallel.

The first end of the fifth resistor and the first end of the sixth resistor are both connected with the first end of the seventh resistor, the second end of the seventh resistor is respectively connected with the fourth resistor and the first end of the second diode, and the second diode is connected with the ground.

Specifically, since the voltage output by the first voltage comparison circuit cannot be directly used as the on-voltage of the switch circuit to control the switch circuit to be turned on, the output voltage of the first voltage comparison circuit can be converted by the first level conversion circuit in the embodiment. Specifically, the voltage of the positive electrode terminal of the battery is used as a reference, the output voltage of the first voltage comparison circuit is converted through the voltage division effect of the fifth resistor and the sixth resistor, and the on voltage of the on-off switch circuit can be obtained through the seventh resistor. The second diode plays a role in voltage stabilization, and the second capacitor plays a role in filtering.

Next, fig. 7A is a fourth schematic structural diagram of the power-on slow start device provided by the present invention, and fig. 7B is a fifth schematic structural diagram of the power-on slow start device provided by the present invention, as shown in fig. 7A and 7B, the power-on slow start device of this embodiment further includes: and a temperature alarm unit. Wherein, the temperature alarm unit is connected with the comparison delay circuit; or the temperature alarm unit is connected with the first resistor in parallel. The temperature alarm unit is used for transmitting a temperature signal or an alarm signal to the input end of the load in the process of supplying power to the load by the battery so as to monitor whether the switch circuit is conducted.

Specifically, the on-off state of the switch circuit affects the power supply process of the battery to the load, and therefore, in order to ensure that the switch circuit is always in the on state in the power supply process of the battery to the load, the embodiment may monitor whether the switch circuit is on through the temperature alarm unit.

Further, when the switch circuit is not turned on, the voltage across the first resistor is abnormally high, and the temperature of the power-on slow start device is also abnormally increased, so the temperature alarm unit may be configured to input a temperature signal or an alarm signal to the load in this embodiment.

Further, when the switch circuit in the power-on slow start device is normally turned on, the temperature alarm unit outputs a temperature signal to the load, so that the working temperature of the power-on slow start device can be conveniently obtained at the load end. When a switch circuit in the power-on slow starting device is not conducted, the temperature alarm unit outputs an alarm signal to the load, so that a person at the load end knows that the power-on slow starting device is abnormal and needs to protect the load end. When the load is unmanned aerial vehicle, when operating personnel detected that it is about to do or has done effect to go up slow starting drive, should make unmanned aerial vehicle get into the protection state as early as possible, trigger to return voyage or compel to land to prevent that user's lives and property from receiving the loss.

Further, in this embodiment, there are various connection manners of the temperature alarm unit. The following describes in detail the specific implementation of the temperature alarm unit in two different connection manners.

Fig. 8 is a sixth schematic structural diagram of a power-on slow start device provided in the present invention, as shown in fig. 8, when a temperature alarm unit is connected to a comparison delay circuit, the temperature alarm unit of this embodiment includes: the first temperature sensor, the second level shift circuit and the fourth switch tube. The first temperature sensor is connected with the input end of the fourth switch tube, the output end of the fourth switch tube is connected with the input end of the load, and the first temperature sensor outputs a temperature signal to the input end of the load.

The output end of the comparison delay circuit is connected with the first input end of the second level conversion circuit, the second input end of the second level conversion circuit is connected with the positive end of the battery, and the output end of the second level conversion circuit is connected with the control end of the fourth switch tube.

When the comparison delay circuit compares that the voltage at the two ends of the first resistor is greater than or equal to the first preset threshold value, the driving signal output by the second level conversion circuit controls the fourth switching tube to be conducted, and the first temperature sensor is disconnected with the input end of the load and used for enabling the input end of the load to output an alarm signal.

Specifically, first temperature sensor can acquire the temperature signal of slow starting drive on real time monitoring in this embodiment, and first temperature sensor is through being connected with the input of fourth switch tube, and the output of fourth switch tube and the input of load are connected, and temperature signal can transmit the input of load when fourth switch tube does not switch on for the temperature of slow starting drive on the personnel real time monitoring of load end prevents that switch circuit from actually effecting and leading to unusual intensification. The present embodiment does not limit the specific type of the first temperature sensor.

Further, in this embodiment, the first input terminal of the second level shift circuit is connected to the output terminal of the comparison delay circuit, therefore, when the comparison delay circuit compares that the voltage across the first resistor is greater than or equal to the first preset threshold, the second input terminal of the second level shift circuit is connected to the positive terminal of the battery, the second level shift circuit can convert the voltage output by the comparison delay circuit into the driving signal with the voltage across the positive terminal of the battery as the reference, and because the output terminal of the second level shift circuit is connected to the control terminal of the fourth switching tube, the input of the driving signal can make the fourth switching tube be turned on, so that the first temperature sensor is disconnected from the input terminal of the load, and the output of the first temperature sensor to the input terminal of the load becomes the alarm signal. In the present embodiment, the specific types of the second level shifter and the fourth switch tube are not limited.

Optionally, fig. 9 is a circuit schematic diagram of a second level shift circuit provided in the present invention, and as shown in fig. 9, the second level shift circuit of this embodiment includes: an eighth resistor, a ninth resistor, a tenth resistor, a third diode, and a third capacitor. The output end of the comparison delay circuit is connected with the first end of the eighth resistor and the first end of the ninth resistor respectively, the second end of the eighth resistor is further connected with the positive electrode end of the battery, the second end of the ninth resistor is connected with the control end of the fourth switching tube, and the tenth resistor, the third capacitor and the third diode are connected with the second end of the ninth resistor and the ground in parallel.

Specifically, since the voltage output by the comparison delay circuit cannot be directly used as the on-voltage of the fourth switching tube to control the on-state of the fourth switching tube, the output voltage of the comparison delay circuit can be converted by the second level conversion circuit in this embodiment. Specifically, the voltage of the positive electrode terminal of the battery is used as a reference, the output voltage of the comparison delay circuit is converted through the voltage division effect of the eighth resistor and the ninth resistor, and the conduction voltage of the conduction switch circuit can be obtained through the tenth resistor. The third diode plays a role in voltage stabilization, and the third capacitor plays a role in filtering.

Fig. 10 is a schematic structural diagram of a seventh implementation manner of the power-on slow start device provided by the present invention, as shown in fig. 10, when the temperature alarm unit is connected to the first resistor, the temperature alarm unit of the present embodiment includes: the second voltage comparison circuit, the second temperature sensor, the third level conversion circuit and the fifth switch tube. The second voltage comparison circuit is connected with the first resistor in parallel, compares the voltages at two ends of the first resistor with a second preset threshold value, and the second preset threshold value is larger than the first preset threshold value.

The output end of the second voltage comparison circuit is connected with the first input end of the third level conversion circuit, the second input end of the third level conversion circuit is connected with the positive electrode end of the battery, and the output end of the third level conversion circuit is connected with the control end of the fifth switch tube.

The second temperature sensor is connected with the input end of the fifth switching tube, the output end of the fifth switching tube is connected with the input end of the load, and the second temperature sensor outputs a temperature signal to the input end of the load.

When the second voltage comparison circuit compares that the voltage at the two ends of the first resistor is greater than or equal to the second preset threshold value, the driving signal output by the third level conversion circuit controls the fifth switching tube to be conducted, and the second temperature sensor is disconnected with the input end of the load and used for enabling the input end of the load to output an alarm signal.

Specifically, in this embodiment, the second temperature sensor can acquire the temperature signal of the power-on slow-start device in real time monitoring, and the second temperature sensor is connected with the input end of the fifth switching tube, the output end of the fifth switching tube is connected with the input end of the load, and the temperature signal can be transmitted to the input end of the load when the fifth switching tube is not turned on, so that the personnel at the load end can monitor the temperature of the power-on slow-start device in real time, and the switching circuit is prevented from being heated abnormally due to practical effects. The present embodiment does not limit the specific type of the second temperature sensor.

Further, in order to timely and accurately reflect whether the switching circuit is abnormal or not in the power supply process from the battery to the load, a new second voltage comparison circuit may be added in the embodiment to determine whether the switching circuit is abnormal or not in the power supply process from the battery to the load by comparing the voltages at the two ends of the first resistor with a second preset threshold. Because the first preset threshold is the maximum critical value for slowly starting the battery to supply power to the load, in this embodiment, the second preset value may be set to be greater than the first preset threshold, so that the load end can timely display the abnormal condition that the switching circuit is disconnected, and perform corresponding operations.

Further, in this embodiment, the first input terminal of the third level shift circuit is connected to the output terminal of the second voltage comparison circuit, so that when the second voltage comparison circuit compares that the voltage across the first resistor is greater than or equal to the second preset threshold, the second input terminal of the third level shift circuit is connected to the positive terminal of the battery, the second level shift circuit can convert the voltage output by the second voltage comparison circuit into the driving signal with the positive terminal voltage of the battery as the reference, and because the output terminal of the third level shift circuit is connected to the control terminal of the fifth switching tube, the input of the driving signal can turn on the fifth switching tube, so that the second temperature sensor is disconnected from the input terminal of the load, and the output of the second temperature sensor to the input terminal of the load becomes the alarm signal. In this embodiment, the specific types of the third level shifter and the fifth switch tube are not limited.

Optionally, fig. 11 is a schematic structural diagram eight of the power-on slow start device provided in the present invention, and as shown in fig. 11, the second voltage comparison circuit includes: an eleventh resistor, a twelfth resistor and a sixth switching tube. The input end of the sixth switching tube is connected with one end of the first resistor, the control end of the sixth switching tube, the eleventh resistor and the other end of the first resistor are sequentially connected, the twelfth resistor is connected with the input end and the control end of the sixth switching tube in parallel, and the output end of the sixth switching tube is connected with the first input end of the third level conversion circuit.

Specifically, in the process of supplying power to the load by the battery, if the switch circuit is turned off, the voltage across the first resistor is abnormally high, and therefore, in this embodiment, the input end of the sixth switch tube is connected to one end of the eleventh resistor, so that the voltage across the input end of the sixth switch tube changes, the other end of the first resistor, the eleventh resistor and the control end of the sixth switch tube are sequentially connected, the twelfth resistor is connected in parallel to the input end and the control end of the sixth switch tube, and the voltage across the control end of the sixth switch tube also changes, thereby changing the on-off state of the sixth switch tube.

Further, when the input voltage of the input end of the sixth switching tube is greater than or equal to a second preset threshold value, the sixth switching tube is turned on. Because the output end of the sixth switching tube is connected with the first input end of the third level conversion circuit, the sixth switching tube can output a transmission signal to the third level conversion circuit, the third level conversion circuit can output a driving signal to control the conduction of the fifth switching tube, and the second temperature sensor is disconnected with the input end of the load, so that an alarm signal is output to the input end of the load, the abnormity of the power-on slow starting device is prompted, and a person in the load section is informed to carry out maintenance or replacement work. In this embodiment, the sizes and specific numbers of the resistances of the eleventh resistor and the twelfth resistor, and the types and numbers of the sixth switching tubes are not limited.

Optionally, fig. 12 is a circuit schematic diagram of a third level shift circuit provided in the present invention, and as shown in fig. 12, the third level shift circuit of this embodiment includes: a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth diode and a fourth capacitor. The output end of the second voltage comparison circuit is connected with the first end of the thirteenth resistor and the first end of the fourteenth resistor respectively, the second end of the thirteenth resistor is further connected with the positive electrode end of the battery, the second end of the fourteenth resistor is connected with the control end of the fifth switching tube, and the fifteenth resistor, the fourth capacitor and the fourth diode are connected with the second end of the fourteenth resistor and the ground in parallel.

Specifically, since the voltage output by the second voltage comparing circuit cannot be directly adopted as the on-state voltage of the fifth switching tube to control the on-state of the fifth switching tube, the output voltage of the second voltage comparing circuit can be converted by the third level converting circuit in the embodiment. Specifically, the voltage at the positive electrode terminal of the battery is used as a reference, the output voltage of the second voltage comparison circuit is converted through the voltage division action of the thirteenth resistor and the fourteenth resistor, and the conduction voltage of the conduction switch circuit can be obtained through the fifteenth resistor. The fourth diode plays a role in voltage stabilization, and the fourth capacitor plays a role in filtering.

Finally, fig. 13 is a schematic structural diagram nine of the power-on slow start device provided by the present invention, and as shown in fig. 13, the switch circuit in the power-on slow start device of this embodiment includes: a first switch tube. The input end and the output end of the first switch tube are used for being connected with the homopolar ends of the battery and the load, the initial state of the first switch tube is a disconnection state, and the processing unit is connected with the control end of the first switch tube.

When the processing unit compares that the voltage of the battery and the voltage of the load at the same pole is smaller than or equal to a first preset threshold value, the processing unit controls the first switching tube to be conducted after delaying preset time, and the first switching tube is used for enabling the battery to supply power to the load.

Specifically, the present embodiment does not limit the specific type of the first switch tube. Optionally, the first switch tube is any one of a metal-oxide-semiconductor (MOS) tube, a transistor diode and an IGBT. For convenience of description, the present embodiment will be described in detail by taking the first switching transistor as an MOS transistor. Optionally, when the input end and the output end of the first switching tube are connected in series with the positive end of the battery and the load, the first switching tube is a P-channel MOS tube; when the input end and the output end of the first switch tube are connected with the battery and the negative end of the load in series, the first switch tube is an N-channel MOS tube.

Further, the input end and the output end of the first switching tube are respectively connected with the positive end of the battery and the positive end of the load, or the input end and the output end of the first switching tube are respectively connected with the negative end of the battery and the negative end of the load, and the initial state of the first switching tube is an off state, so that the disconnection of the path between the battery and the load is controlled.

Further, in this embodiment, the processing unit is further connected to the control end of the first switch tube, so that when the processing unit compares that the voltage at the same pole of the battery and the load is less than or equal to the first preset threshold, the processing unit can control the first switch tube to be turned on through the control end of the first switch tube after delaying the preset time, so that the battery can supply power to the load.

It should be noted that in this embodiment, the first switching tube, the second switching tube, the third switching tube, the fourth switching tube and the fifth switching tube may all adopt any one of a MOS transistor, a transistor diode and an IGBT, which is not limited in this embodiment.

Fig. 14 is a schematic structural diagram of a battery assembly provided in the present invention, and as shown in fig. 14, the battery assembly of the present embodiment includes: a battery and a power-up slow start device as described above. The first input end of the power-on slow-start device is connected with the positive end of the battery, the first output end of the power-on slow-start device is used for being connected with the positive end of the load, the second input end of the power-on slow-start device is connected with the negative end of the battery, the second output end of the power-on slow-start device is used for being connected with the negative end of the load, and the initial state of the power-on slow-start device is a disconnection state.

When the power-on slow start device is connected with the load and the voltage of the battery and the voltage of the load at the same pole is determined to be less than or equal to a first preset threshold value, the power-on slow start device is conducted after delaying for a preset time, and the power-on slow start device is used for enabling the battery to supply power to the load.

The battery assembly provided by the embodiment of the present invention includes the power-on slow start device as described above, and the above embodiments can be implemented, and specific implementation principles and technical effects thereof can be referred to the above method embodiments, which are not described herein again.

Fig. 15 is a schematic structural view of the unmanned aerial vehicle provided in the present invention, as shown in fig. 15, the unmanned aerial vehicle includes a body and a battery mounted on the body, and the unmanned aerial vehicle of this embodiment further includes: the power-on slow start device is arranged on the machine body.

The first output end of the power-on slow-start device is connected with the positive end of the unmanned aerial vehicle, the first input end of the power-on slow-start device is used for connecting the positive end of the battery, the second output end of the power-on slow-start device is connected with the negative end of the unmanned aerial vehicle, the second input end of the power-on slow-start device is used for connecting the negative end of the battery, and the initial state of the power-on slow-start device is a disconnection state.

When the power-on slow starting device is connected with the battery and determines that the voltage of the battery and the voltage of the homopolar terminal of the unmanned aerial vehicle is smaller than or equal to a first preset threshold value, the power-on slow starting device is conducted after delaying preset time, and the power-on slow starting device is used for enabling the battery to supply power to the unmanned aerial vehicle.

The unmanned aerial vehicle provided by the embodiment of the invention can be a plant protection unmanned aerial vehicle applied to agriculture and forestry plant protection operation, the unmanned aerial vehicle is generally loaded with a load with a certain weight, such as pesticide for removing plant diseases and insect pests or seeds for sowing, and the unmanned aerial vehicle is driven by a large-voltage high-capacity battery. The unmanned aerial vehicle provided by the embodiment of the invention adopts the power-on slow start device as described above, and the above embodiment can be executed.

Fig. 16 is a flowchart illustrating a first method for power-on slow start according to the present invention, in which the method of the present embodiment is executed by a power-on slow start device for slowly starting a power supply process from a battery to a load; in this embodiment, only a simple description is given to the method, and a specific execution principle may be described with reference to an embodiment of the apparatus, as shown in fig. 16, the power-on slow start method in this embodiment includes:

s101, acquiring the homopolar terminal voltages of a battery and a load by the power-on slow-start device, wherein the initial state of the power-on slow-start device is a disconnected state.

S102, the power-on slow start device judges whether the voltage of the homopolar terminal is smaller than or equal to a first preset threshold value.

And S103, if the voltage of the homopolar terminal is less than or equal to a first preset threshold value, the power-on slow starting device is conducted after delaying preset time, and the power-on slow starting device is used for enabling the battery to supply power to the load.

Fig. 17 is a flowchart illustrating a second method for power-on slow start according to the present invention, in which the method of the present embodiment is executed by a power-on slow start apparatus for slowly starting a power supply process from a battery to a load; in this embodiment, only a simple description is made on the method, and a specific execution principle may be described with reference to the device embodiment, as shown in fig. 17, the power-on slow start method in this embodiment includes:

s201, acquiring the homopolar terminal voltage of a battery and a load by the power-on slow-start device, wherein the initial state of the power-on slow-start device is a disconnected state.

S202, the power-on slow start device judges whether the voltage of the homopolar terminal is smaller than or equal to a first preset threshold value. If yes, go to S203; if not, go to S204.

And S203, the power-on slow starting device is conducted after delaying preset time, and is used for enabling the battery to supply power to the load.

S201, S202, and S203 are respectively similar to the implementation manners of S101, S102, S103, and the like in the embodiment of fig. 16, and details are not repeated here.

And S204, keeping the power-on slow starting device in a disconnected state.

Fig. 18 is a third schematic flow chart of a power-on slow-start method according to the present invention, in which the method of the present embodiment is executed by a power-on slow-start device for monitoring whether a switch circuit is normally turned on; the method is described simply in this embodiment, and the specific implementation principle may be described with reference to the device embodiment. As shown in fig. 18, in the process of supplying power from the battery to the load, the power-on slow start method of the embodiment includes:

s301, the power-on slow start device judges whether the voltage of the homopolar terminal is greater than or equal to a second preset threshold value, wherein the second preset threshold value is greater than or equal to the first preset threshold value. If yes, executing S302; if not, go to S303.

And S302, transmitting an alarm signal to the input end of the load by the power-on slow start device.

And S303, transmitting a temperature signal to the input end of the load by the power-on slow start device.

Those of ordinary skill in the art will understand that: all or part of the steps of implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer-readable storage medium, and when executed, executes the steps including the method embodiments; and the aforementioned storage medium includes: Read-Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and other various media capable of storing program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power-on slow start device is characterized by comprising: the processing unit is connected with the switching circuit;

when the comparison result shows that the homopolar terminal voltage of the battery and the load is less than or equal to a first preset threshold value, the processing unit controls the switching circuit to be switched on after delaying for preset time, so that the battery supplies power to the load;

the processing unit includes: a first resistor and a comparison delay circuit; the two ends of the first resistor are used for being connected with homopolar ends of the battery and the load, the comparison delay circuit is connected with the first resistor in parallel, and the comparison delay circuit acquires voltages of the two ends of the first resistor; the output end of the comparison delay circuit is connected with the switch circuit, and when the comparison delay circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the switch circuit is controlled to be switched on after delaying the preset time, so that the battery supplies power to the load;

the comparison delay circuit includes: the first voltage comparison circuit and the soft start delay circuit; the first voltage comparison circuit is connected with the first resistor in parallel, and compares the voltage at two ends of the first resistor with the first preset threshold value; the output end of the first voltage comparison circuit is connected with the input end of the slow start delay circuit, and the output end of the slow start delay circuit is connected with the switch circuit; when the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the slow start delay circuit transmits and receives a transmission signal sent by the first voltage comparison circuit, controls the switching circuit to be switched on after delaying the preset time, and is used for enabling the battery to supply power to the load;

the first voltage comparison circuit includes: the second resistor, the third resistor and the second switch tube; the input end of the second switch tube is connected with one end of the first resistor, the control end of the second switch tube, the second resistor and the other end of the first resistor are sequentially connected, the third resistor is connected with the input end and the control end of the second switch tube in parallel, and the output end of the second switch tube is connected with the input end of the slow start delay circuit; when the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the output end of the second switch tube sends the transmission signal to the slow start delay circuit, and the slow start delay circuit controls the switch circuit to be switched on after delaying the preset time according to the transmission signal, so that the battery supplies power to the load.

2. The power-on slow start device according to claim 1, wherein the slow start delay circuit comprises: the first level conversion circuit, the fourth resistor, the third switching tube, the first diode and the first capacitor;

a first input end of the first level conversion circuit is connected with a first output end of the first voltage comparison circuit, a second input end of the first level conversion circuit is connected with a positive electrode end of the battery, and an output end of the first level conversion circuit, the fourth resistor and the switch circuit are sequentially connected;

the control end and the output end of the third switching tube are respectively connected with the anode and the cathode of the first diode, the output end of the third switching tube is also respectively connected with the first capacitor and the control end of the third switching tube, and the input ends of the first capacitor and the third switching tube are both connected with the ground;

when the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the first level conversion circuit receives the transmission signal sent by the first voltage comparison circuit, the first level conversion circuit obtains a conducting voltage according to the voltage at the anode of the battery and the transmission signal, and the third switching tube controls the switching circuit to be conducted after delaying the preset time according to the conducting voltage so as to enable the battery to supply power to the load.

3. The power-on slow start device according to claim 2, wherein the first level shift circuit comprises: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the second diode and the second capacitor;

the first output end of the first voltage comparison circuit is connected with the first end of the fifth resistor and the first end of the sixth resistor respectively, the second end of the fifth resistor is further connected with the positive electrode end of the battery, the second end of the sixth resistor is further connected with the ground, and the two ends of the second capacitor are connected with the first output end of the first voltage comparison circuit and the ground in parallel;

4. The power-on slow start device according to claim 1, wherein when the first voltage comparison circuit compares that the voltage across the first resistor is greater than the first preset threshold, the first voltage comparison circuit sends the transmission signal to the slow start delay circuit, the slow start delay circuit obtains a turn-off voltage according to the transmission signal, and the slow start delay circuit controls the switch circuit to keep a turn-off state.

5. The power-on slow start device of claim 1, further comprising: a temperature alarm unit;

the temperature alarm unit is connected with the comparison delay circuit; alternatively, the first and second electrodes may be,

the temperature alarm unit is connected with the first resistor;

the temperature alarm unit is used for transmitting a temperature signal or an alarm signal to the input end of the load in the process that the battery supplies power to the load so as to monitor whether the switch circuit is conducted or not.

6. The power-on slow start device according to claim 5, wherein when the temperature alarm unit is connected to the comparison delay circuit, the temperature alarm unit includes: the first temperature sensor, the second level conversion circuit and the fourth switch tube;

the first temperature sensor is connected with the input end of the fourth switching tube, the output end of the fourth switching tube is connected with the input end of the load, and the first temperature sensor outputs a temperature signal to the input end of the load;

the output end of the comparison delay circuit, the first input end of the second level conversion circuit and the control end of the fourth switch tube are sequentially connected, and the second input end of the second level conversion circuit is connected with the positive electrode end of the battery;

when the comparison delay circuit compares that the voltage at the two ends of the first resistor is greater than or equal to the first preset threshold value, the driving signal output by the second level conversion circuit controls the fourth switch tube to be switched on, and the first temperature sensor is disconnected with the input end of the load and used for enabling the input end of the load to output the alarm signal.

7. The power-on soft start apparatus of claim 6, wherein the second level shift circuit comprises: an eighth resistor, a ninth resistor, a tenth resistor, a third diode and a third capacitor;

the output end of the comparison delay circuit is connected with the first end of the eighth resistor and the first end of the ninth resistor respectively, the second end of the eighth resistor is further connected with the positive end of the battery, the second end of the ninth resistor is connected with the control end of the fourth switch tube, and the tenth resistor, the third capacitor and the third diode are connected with the second end of the ninth resistor and the ground in parallel.

8. The power-on slow start device according to claim 5, wherein when the temperature alarm unit is connected to the first resistor, the temperature alarm unit includes: the second voltage comparison circuit, the second temperature sensor, the third level conversion circuit and the fifth switching tube;

the second voltage comparison circuit is connected with the first resistor in parallel, compares the voltage at two ends of the first resistor with a second preset threshold value, and the second preset threshold value is larger than the first preset threshold value;

the output end of the second voltage comparison circuit, the first input end of the third level conversion circuit and the control end of the fifth switching tube are sequentially connected, and the second input end of the third level conversion circuit is connected with the positive electrode end of the battery;

the second temperature sensor is connected with the input end of the fifth switching tube, the output end of the fifth switching tube is connected with the input end of the load, and the second temperature sensor outputs a temperature signal to the input end of the load;

when the second voltage comparison circuit compares that the voltage at the two ends of the first resistor is greater than or equal to the second preset threshold value, the driving signal output by the third level conversion circuit controls the fifth switching tube to be switched on, and the second temperature sensor is disconnected with the input end of the load and used for enabling the input end of the load to output the alarm signal.

9. The power-on slow start device according to claim 8, wherein the second voltage comparison circuit comprises: an eleventh resistor, a twelfth resistor and a sixth switching tube;

the input end of the sixth switching tube is connected with one end of the first resistor, the control end of the sixth switching tube, the eleventh resistor and the other end of the first resistor are sequentially connected, the twelfth resistor is connected with the input end and the control end of the sixth switching tube in parallel, and the output end of the sixth switching tube is connected with the first input end of the third level conversion circuit;

10. The power-on soft start apparatus of claim 8, wherein the third level shift circuit comprises: a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth diode and a fourth capacitor;

the output end of the second voltage comparison circuit is connected with the first end of the thirteenth resistor and the first end of the fourteenth resistor respectively, the second end of the thirteenth resistor is further connected with the positive end of the battery, the second end of the fourteenth resistor is connected with the control end of the fifth switching tube, and the fifteenth resistor, the fourth capacitor and the fourth diode are all connected with the second end of the fourteenth resistor and the ground in parallel.

11. The power-on soft start apparatus of claim 1, wherein the switching circuit comprises: a first switch tube;

the input end and the output end of the first switching tube are used for being connected with the homopolar ends of the battery and the load, the initial state of the first switching tube is a disconnected state, and the processing unit is connected with the control end of the first switching tube;

when the processing unit compares that the voltage of the homopolar terminals of the battery and the load is smaller than or equal to a first preset threshold value, the processing unit controls the first switching tube to be conducted after delaying the preset time, and the first switching tube is used for enabling the battery to supply power to the load.

12. The power-on slow start device according to claim 11, wherein the first switch transistor is any one of a MOS transistor, a transistor diode and an IGBT.

13. The power-on soft start apparatus of claim 12,

when the input end and the output end of the first switching tube are connected with the battery and the positive end of the load in series, the first switching tube is a P-channel MOS tube;

when the input end and the output end of the first switch tube are connected with the battery and the negative end of the load in series, the first switch tube is an N-channel MOS tube.

14. A power-up soft start device according to any one of claims 1-2, wherein the first resistance is an anti-surge resistance.

15. A battery assembly, comprising: a battery and a power-on slow start device;

when the power-on slow starting device is connected with the load and the voltage of the battery and the voltage of the load at the same pole is determined to be less than or equal to a first preset threshold value, the power-on slow starting device is conducted after delaying for a preset time, and the power-on slow starting device is used for enabling the battery to supply power to the load;

the power-on slow start device comprises: the processing unit is connected with the switching circuit; the input end of the switch circuit is connected with the first pole terminal of the battery, the output end of the switch circuit is used for being connected with the first pole terminal of the load, the first pole terminal of the load and the first pole terminal of the battery are homopolar terminals, and the initial state of the switch circuit is a disconnection state; the first end of the processing unit is connected with the second pole end of the battery, the second end of the processing unit is used for being connected with the second pole end of the load, the second pole end of the load and the second pole end of the battery are the same pole ends, and the first pole end and the second pole end are the same pole ends; when the voltage of the same pole terminal of the battery and the load is smaller than or equal to the first preset threshold value through comparison, the processing unit controls the switching circuit to be conducted after the preset time is delayed, and the switching circuit is used for enabling the battery to supply power to the load;

the processing unit includes: a first resistor and a comparison delay circuit; the first end of the first resistor is connected with the second pole end of the battery, the second end of the first resistor is used for being connected with the second pole end of the load, the comparison delay circuit is connected with the first resistor in parallel, and the comparison delay circuit obtains the voltage at the two ends of the first resistor; the output end of the comparison delay circuit is connected with the switch circuit, and when the comparison delay circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the switch circuit is controlled to be switched on after delaying the preset time, so that the battery supplies power to the load;

16. The battery assembly of claim 15, wherein the slow start delay circuit comprises: the first level conversion circuit, the fourth resistor, the third switching tube, the first diode and the first capacitor;

when the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the first level conversion circuit receives the transmission signal sent by the first voltage comparison circuit, the first level conversion circuit obtains a conducting voltage according to the voltage at the positive electrode of the battery and the transmission signal, and the third switching tube controls the switching circuit to be conducted after delaying the preset time according to the conducting voltage so as to enable the battery to supply power to the load.

17. The battery assembly of claim 16, wherein the first level shift circuit comprises: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the second diode and the second capacitor;

18. The battery pack of claim 15, wherein when the first voltage comparison circuit compares that the voltage across the first resistor is greater than the first preset threshold, the first voltage comparison circuit sends the transmission signal to the slow start delay circuit, the slow start delay circuit obtains a turn-off voltage according to the transmission signal, and the slow start delay circuit controls the switch circuit to maintain a turn-off state.

19. The battery assembly of claim 15, wherein the power-up slow start means further comprises: a temperature alarm unit;

the temperature alarm unit is connected with the first resistor;

20. The battery assembly of claim 19, wherein when the temperature alert unit is connected to the comparative delay circuit, the temperature alert unit comprises: the first temperature sensor, the second level conversion circuit and the fourth switch tube;

21. The battery pack of claim 20, wherein the second level shift circuit comprises: an eighth resistor, a ninth resistor, a tenth resistor, a third diode and a third capacitor;

22. The battery assembly of claim 19, wherein when the temperature warning unit is connected to the first resistor, the temperature warning unit comprises: the second voltage comparison circuit, the second temperature sensor, the third level conversion circuit and the fifth switching tube;

the second voltage comparison circuit is connected with the first resistor in parallel, and compares the voltage at two ends of the first resistor with a second preset threshold, wherein the second preset threshold is greater than the first preset threshold;

23. The battery pack of claim 22, wherein the second voltage comparison circuit comprises: an eleventh resistor, a twelfth resistor and a sixth switching tube;

when the second voltage comparison circuit compares that the voltage at the two ends of the first resistor is greater than or equal to the second preset threshold value, the driving signal output by the third level conversion circuit controls the fifth switching tube to be switched on, and the second temperature sensor is disconnected from the input end of the load and used for enabling the input end of the load to output the alarm signal.

24. The battery pack of claim 22, wherein the third level shift circuit comprises: a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth diode and a fourth capacitor;

25. The battery assembly of claim 15, wherein the switching circuit comprises: a first switch tube;

when the processing unit compares that the voltage of the same pole terminal of the battery and the load is smaller than or equal to a first preset threshold value, the processing unit controls the first switch tube to be conducted after delaying the preset time, and the first switch tube is used for enabling the battery to supply power to the load.

26. The battery pack of claim 25, wherein the first switch tube is any one of a MOS transistor, a transistor diode, and an IGBT.

27. The battery assembly of claim 26,

28. A battery assembly according to any of claims 15 to 16, wherein the first resistance is an anti-surge resistance.

29. The utility model provides an unmanned aerial vehicle, includes the fuselage, install in the battery of fuselage, its characterized in that, unmanned aerial vehicle still includes: the power-on slow starting device is arranged on the machine body;

when the power-on slow starting device is connected with the battery and determines that the voltage of the battery and the voltage of the same pole of the unmanned aerial vehicle is smaller than or equal to a first preset threshold value, the power-on slow starting device is conducted after delaying for a preset time, and the power is supplied to the unmanned aerial vehicle by the battery;

the power-on slow start device comprises: the processing unit is connected with the switching circuit; the input end of the switch circuit is used for being connected with the first extreme end of the battery, the output end of the switch circuit is connected with the first extreme end of the unmanned aerial vehicle, the first extreme end of the unmanned aerial vehicle and the first extreme end of the battery are homopolar ends, and the initial state of the switch circuit is a disconnection state; the first end of the processing unit is used for being connected with the second pole end of the battery, the second end of the processing unit is connected with the second pole end of the unmanned aerial vehicle, the second pole end of the unmanned aerial vehicle and the second pole end of the battery are the same pole ends, and the first pole end and the second pole end are the same pole ends; when the comparison result shows that the voltages of the battery and the homopolar terminal of the unmanned aerial vehicle are less than or equal to the first preset threshold value, the processing unit controls the switching circuit to be switched on after delaying the preset time, so that the battery supplies power to the unmanned aerial vehicle;

the processing unit includes: a first resistor and a comparison delay circuit; the first end of the first resistor is used for being connected with the second pole end of the battery, the second end of the first resistor is connected with the second pole end of the unmanned aerial vehicle, the comparison delay circuit is connected with the first resistor in parallel, and the comparison delay circuit obtains voltages at two ends of the first resistor; the output end of the comparison delay circuit is connected with the switch circuit, and when the comparison delay circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the switch circuit is controlled to be switched on after delaying the preset time, so that the battery supplies power to the unmanned aerial vehicle;

the comparison delay circuit includes: the first voltage comparison circuit and the soft start delay circuit; the first voltage comparison circuit is connected with the first resistor in parallel, and compares the voltage at two ends of the first resistor with the first preset threshold value; the output end of the first voltage comparison circuit is connected with the input end of the slow start delay circuit, and the output end of the slow start delay circuit is connected with the switch circuit; when the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the slow start delay circuit transmits and receives a transmission signal sent by the first voltage comparison circuit, controls the switching circuit to be switched on after delaying the preset time, and is used for enabling the battery to supply power to the unmanned aerial vehicle;

the first voltage comparison circuit includes: the second resistor, the third resistor and the second switch tube; the input end of the second switch tube is connected with one end of the first resistor, the control end of the second switch tube, the second resistor and the other end of the first resistor are sequentially connected, the third resistor is connected with the input end and the control end of the second switch tube in parallel, and the output end of the second switch tube is connected with the input end of the slow start delay circuit; when the both ends voltage of first resistance is less than or equal to when first threshold value of predetermineeing, the output of second switch tube to slowly start delay circuit sends transmission signal, slowly start delay circuit basis transmission signal, control switch circuit postpones switch on after the preset time, be used for making the battery to unmanned aerial vehicle supplies power.

30. The drone of claim 29, wherein the soft start delay circuit comprises: the first level conversion circuit, the fourth resistor, the third switching tube, the first diode and the first capacitor;

when the first voltage comparison circuit compares that the voltage at the two ends of the first resistor is smaller than or equal to the first preset threshold value, the first level conversion circuit receives the transmission signal sent by the first voltage comparison circuit, the first level conversion circuit obtains a conducting voltage according to the voltage at the positive electrode of the battery and the transmission signal, and the third switching tube controls the switching circuit to be conducted after delaying the preset time according to the conducting voltage so as to enable the battery to supply power to the unmanned aerial vehicle.

31. The drone of claim 30, wherein the first level shift circuit comprises: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the second diode and the second capacitor;

the first output end of the first voltage comparison circuit is respectively connected with the first end of the fifth resistor and the first end of the sixth resistor, the second end of the fifth resistor is also connected with the positive terminal of the battery, the second end of the sixth resistor is also connected with the ground, and the two ends of the second capacitor are connected with the first output end of the first voltage comparison circuit and the ground in parallel;

32. The UAV of claim 29, wherein when the first voltage comparator compares that the voltage across the first resistor is greater than the first preset threshold, the first voltage comparator sends the transmission signal to the slow start delay circuit, the slow start delay circuit obtains a turn-off voltage according to the transmission signal, and the slow start delay circuit controls the switch circuit to keep the turn-off state.

33. A drone as claimed in claim 29, wherein the power-up slow start device further includes: a temperature alarm unit;

the temperature alarm unit is connected with the first resistor;

the temperature warning unit is used for the battery to unmanned aerial vehicle's power supply in-process, to unmanned aerial vehicle's input transmission temperature signal or warning signal, in order to monitor whether switch circuit switches on.

34. The drone of claim 33, wherein when the temperature alert unit is connected to the compare delay circuit, the temperature alert unit includes: the first temperature sensor, the second level switching circuit and the fourth switching tube are connected with the first voltage source;

the first temperature sensor is connected with the input end of the fourth switch tube, the output end of the fourth switch tube is connected with the input end of the unmanned aerial vehicle, and the first temperature sensor outputs a temperature signal to the input end of the unmanned aerial vehicle;

when the comparison delay circuit compares that the voltage at two ends of the first resistor is greater than or equal to the first preset threshold value, the driving signal output by the second level conversion circuit controls the fourth switch tube to be switched on, the first temperature sensor is disconnected with the input end of the unmanned aerial vehicle, and the input end of the unmanned aerial vehicle outputs the alarm signal.

35. The drone of claim 34, wherein the second level shift circuit comprises: an eighth resistor, a ninth resistor, a tenth resistor, a third diode and a third capacitor;

36. The drone of claim 33, wherein when the temperature alert unit is connected to the first resistor, the temperature alert unit includes: the second voltage comparison circuit, the second temperature sensor, the third level conversion circuit and the fifth switching tube;

the second temperature sensor is connected with the input end of the fifth switching tube, the output end of the fifth switching tube is connected with the input end of the unmanned aerial vehicle, and the second temperature sensor outputs a temperature signal to the input end of the unmanned aerial vehicle;

when the second voltage comparison circuit compares that the voltage at two ends of the first resistor is greater than or equal to the second preset threshold value, the driving signal output by the third level conversion circuit controls the fifth switch tube to be switched on, and the second temperature sensor is disconnected with the input end of the unmanned aerial vehicle and used for enabling the input end of the unmanned aerial vehicle to output the alarm signal.

37. The drone of claim 36, wherein the second voltage comparison circuit comprises: an eleventh resistor, a twelfth resistor and a sixth switching tube;

38. The drone of claim 36, wherein the third level shift circuit comprises: a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth diode and a fourth capacitor;

39. The drone of claim 29, wherein the switching circuit comprises: a first switch tube;

the input end and the output end of the first switch tube are used for connecting the battery and the homopolar end of the unmanned aerial vehicle, the initial state of the first switch tube is a disconnected state, and the processing unit is connected with the control end of the first switch tube;

when the processing unit compares that the voltages of the battery and the unmanned aerial vehicle at the same pole are smaller than or equal to a first preset threshold value, the processing unit controls the first switch tube to be conducted after delaying the preset time, and the battery is used for supplying power to the unmanned aerial vehicle.

40. An unmanned aerial vehicle as claimed in claim 39, wherein the first switch is any one of MOS transistor, crystal diode and IGBT.

41. A drone according to claim 40,

when the input end and the output end of the first switch tube are connected with the battery and the positive end of the unmanned aerial vehicle in series, the first switch tube is a P-channel MOS tube;

when the input and the output of first switch tube series connection the battery with during unmanned aerial vehicle's negative pole end, first switch tube is N channel MOS pipe.

42. A drone as claimed in any of claims 29 to 30, wherein the first resistance is an anti-surge resistance.

43. A power-on slow start method for a power-on slow start device, wherein the power-on slow start device is the power-on slow start device of any one of claims 1 to 14, and the power-on slow start method comprises:

the power-on slow starting device acquires the voltages of the homopolar terminals of a battery and a load, wherein the initial state of the power-on slow starting device is a disconnected state;

the power-on slow starting device judges whether the voltage of the homopolar terminal is less than or equal to a first preset threshold value;

44. The power-on slow start method according to claim 43, wherein when the homopolar voltage is greater than the first preset threshold, the method further comprises:

the power-on slow start device maintains a disconnected state.

45. The power-on slow start method according to claim 43, wherein during the power supply from the battery to the load, the method further comprises:

the power-on slow start device judges whether the voltage of the homopolar terminal is greater than or equal to a second preset threshold value, wherein the second preset threshold value is greater than or equal to the first preset threshold value;

and if so, transmitting an alarm signal to the input end of the load by the power-on slow start device.

46. The power-on slow start method according to claim 45, wherein when the power-on slow start device determines that the voltage at the same pole is smaller than a second preset threshold, the method comprises:

and the power-on slow starting device transmits a temperature signal to the input end of the load.