CN109546612A - A kind of protection circuit, battery and aircraft - Google Patents

A kind of protection circuit, battery and aircraft Download PDF

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Publication number
CN109546612A
CN109546612A CN201811644530.4A CN201811644530A CN109546612A CN 109546612 A CN109546612 A CN 109546612A CN 201811644530 A CN201811644530 A CN 201811644530A CN 109546612 A CN109546612 A CN 109546612A
Authority
CN
China
Prior art keywords
circuit
input terminal
connect
voltage
resistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811644530.4A
Other languages
Chinese (zh)
Inventor
秦威
张辉华
陈法全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Autel Intelligent Aviation Technology Co Ltd
Original Assignee
Shenzhen Autel Intelligent Aviation Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Autel Intelligent Aviation Technology Co Ltd filed Critical Shenzhen Autel Intelligent Aviation Technology Co Ltd
Priority to CN201811644530.4A priority Critical patent/CN109546612A/en
Publication of CN109546612A publication Critical patent/CN109546612A/en
Priority to PCT/CN2019/129563 priority patent/WO2020135798A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D27/00—Arrangement or mounting of power plant in aircraft; Aircraft characterised thereby
    • B64D27/02—Aircraft characterised by the type or position of power plant
    • B64D27/24—Aircraft characterised by the type or position of power plant using steam, electricity, or spring force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
    • B64U50/00—Propulsion; Power supply
    • B64U50/10—Propulsion
    • B64U50/19—Propulsion using electrically powered motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators

Abstract

The present invention relates to field of circuit technology, a kind of protection circuit, battery and aircraft are disclosed.Wherein, protection circuit is for being monitored power supply circuit, comprising: detection circuit；Switching circuit is connect with the detection circuit；When the detection circuit detects the power supply circuit exception, the detection circuit exports low level, so that the switching circuit is in an off state, to cut off current supply circuit.Protection circuit provided in an embodiment of the present invention can effectively save cost without dedicated protection chip；Also, also the adaptability and flexibility of protection can be effectively improved by adjusting the detection circuit of protection circuit and the parameter of switching circuit to adapt to different power supply needs.

Description

A kind of protection circuit, battery and aircraft
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of protection circuit, the battery with the protection circuit, with And the aircraft with the battery.
Background technique
In circuit design, in order to avoid the damage of product and its component, it will usually which to abnormal electrical power supply the case where carries out Protection processing, to extend product service life etc..Currently, the mode that the case where to abnormal electrical power supply carries out protection processing is usually: Use privacy protection chip etc..
In the implementation of the present invention, at least there are the following problems in the related technology for inventor's discovery: using dedicated core Piece is on the one hand at high cost；On the other hand, due to special chip, its parameter has usually been fixedly installed before factory, The adaptability of protection and flexibility are inadequate.
Summary of the invention
The embodiment of the present invention is intended to provide a kind of protection circuit, battery and aircraft, without dedicated protection chip, Cost can effectively be saved；Also, can also by adjusting the detection circuit and switching circuit of protecting circuit parameter to adapt to not Same power supply needs, and effectively improves the adaptability and flexibility of protection.
The embodiment of the invention discloses following technical schemes:
In a first aspect, for being monitored to power supply circuit, being wrapped the embodiment of the invention provides a kind of protection circuit It includes:
Detection circuit；
Switching circuit is connect with the detection circuit；
When the detection circuit detects the power supply circuit exception, the detection circuit exports low level, so that institute It states switching circuit to be in an off state, to cut off current supply circuit.
Optionally, the protection circuit further include: input anode, output cathode, input cathode, output negative pole, wherein institute It states power supply circuit and supply voltage is applied to the input anode, also, input anode is connect with the output cathode；
The detection circuit includes detection input and detection output, the detection input and the input it is positive and The output cathode connection；
The switching circuit is connect with the detection output, also, the switching circuit be connected to input cathode with it is defeated Out between cathode.
Optionally, the detection circuit includes: abnormal Acquisition Circuit, reference circuit and comparison circuit；
The comparison circuit includes first comparing input terminal, second comparing input terminal and compare output end；The exception is adopted Collector input terminal compared with described first connects, and reference circuit input terminal compared with described second connects, the comparison Output end is connect with the switching circuit；
When detecting the power supply circuit exception, the comparison output end of the comparison circuit exports low level, so that institute It states switching circuit to be in an off state, to cut off current supply circuit；
Wherein, the abnormal first voltage exported by the abnormal Acquisition Circuit of the power supply circuit and the reference circuit The second voltage exported is determined.
Optionally, the power supply circuit includes at least one following abnormal conditions extremely: excess temperature occurs for the power supply circuit Over-voltage occurs with the power supply circuit.
Optionally, the abnormal Acquisition Circuit includes: excess temperature Acquisition Circuit, overvoltage acquisition circuit and the first partial pressure electricity Road；
The input terminal of the excess temperature Acquisition Circuit and the input terminal of the overvoltage acquisition circuit connect with the input anode It connects, the output end of the excess temperature Acquisition Circuit is connect with the input terminal of first bleeder circuit, first bleeder circuit Output end is connect with the output end of the overvoltage acquisition circuit, also, the output end of first bleeder circuit is as described different The output end of normal Acquisition Circuit input terminal compared with described first connects.
Optionally, the excess temperature Acquisition Circuit includes temperature sensor；
The first end of the temperature sensor is connect as the input terminal of the excess temperature Acquisition Circuit with the input anode, The second end of the temperature sensor is as the output end of the excess temperature Acquisition Circuit and the input terminal of first bleeder circuit Connection.
Optionally, the overvoltage acquisition circuit includes: the first zener diode and first resistor；
The cathode of first zener diode connects as the input terminal and input anode of the overvoltage acquisition circuit It connects, the second end of first zener diode is connect with the first end of the first resistor, the second end of the first resistor Output end as the overvoltage acquisition circuit is connect with the output end of first bleeder circuit.
Optionally, first bleeder circuit includes second resistance and 3rd resistor；
Input terminal and the excess temperature Acquisition Circuit of the first end of the second resistance as first bleeder circuit The connection of output end end, the second end of the second resistance are defeated compared with described first as the output end of first bleeder circuit Enter end connection, also, the second end of the second resistance is also connect with the first end of the 3rd resistor, the 3rd resistor Second end ground connection.
Optionally, the reference circuit includes the second bleeder circuit；
The input terminal of second bleeder circuit is connect with the input anode, and the output end of second bleeder circuit is made For output end input terminal connection compared with described second of the reference circuit.
Optionally, second bleeder circuit includes the 4th resistance and the 5th resistance；
The first end of 4th resistance is connect as the input terminal of second bleeder circuit with the input anode, institute Output end with described second compared with input terminal connection of the second end as second bleeder circuit of the 4th resistance is stated, also, The second end of 4th resistance is also connect with the first end of the 5th resistance, the second end ground connection of the 5th resistance.
Optionally, the comparison circuit includes comparator；
The inverting input terminal of the comparator compares input terminal as described first and connect with the abnormal Acquisition Circuit, institute The normal phase input end for stating comparator compares input terminal as described second and connect with the reference circuit, the output of the comparator End is connect as the relatively output end with the switching circuit.
Optionally, the comparison circuit further includes first capacitor, the first end of the first capacitor and the comparator Inverting input terminal connection, the second end ground connection of the first capacitor.
Optionally, the detection circuit further includes feed circuit, the input terminal of the feed circuit and the comparison circuit Comparison output end connection, the output end of the feed circuit with the second of the comparison circuit compared with input terminal connection.
Optionally, the feed circuit includes first diode and the 6th resistance, the cathode conduct of the first diode The input terminal of the feed circuit compared with the comparison circuit output end connect, the anode of the first diode with it is described The first end of 6th resistance connects, comparison circuit described in output end of the second end of the 6th resistance as the feed circuit Second compare input terminal connection.
Optionally, the detection circuit further include: voltage hold circuit；
The voltage hold circuit includes keeping input terminal and keeping output end, and the holding input terminal and the input are just Pole connection, the holding output end connect with the input terminal of the input terminal of the excess temperature Acquisition Circuit and the reference circuit respectively It connects；
The voltage hold circuit is used to carry out steady pressure treatment to the supply voltage, to obtain reference voltage, and by institute It states reference voltage and is input to the input terminal of the excess temperature Acquisition Circuit and the input terminal of the reference circuit.
Optionally, the voltage hold circuit includes the first voltage regulator circuit；
The output end of first voltage regulator circuit respectively with the input terminal and the reference circuit of the excess temperature Acquisition Circuit Input terminal connection, first voltage regulator circuit be used for the supply voltage carry out the first steady pressure treatment, to obtain the base Quasi- voltage；
Wherein, first voltage regulator circuit include the 7th resistance and controllable voltage-stabiliser tube, the first end of the 7th resistance with Input anode connection, the second end of the 7th resistance as the voltage hold circuit holding output end and it is described can Control the reference pole of voltage-stabiliser tube and the cathode connection of the controllable voltage-stabiliser tube, the plus earth of the controllable voltage-stabiliser tube.
Optionally, the voltage hold circuit further includes the second voltage regulator circuit, and second voltage regulator circuit includes that pressure stabilizing is defeated Enter end and output end of pressure-stabilizing；
The pressure stabilizing input terminal is connect with input anode, the output end of pressure-stabilizing respectively with the comparison circuit and the The connection of one voltage regulator circuit, second voltage regulator circuit is used to carry out the second steady pressure treatment to the supply voltage, to obtain work Voltage, the operating voltage is for driving the comparison circuit and the first voltage regulator circuit to work.
Optionally, second voltage regulator circuit includes: the second diode, the 8th resistance and the second capacitor；
The anode of second diode is connect as the pressure stabilizing input terminal with the input anode, the two or two pole The cathode of pipe is connect with the first end of the 8th resistance, and the second end of the 8th resistance is as the output end of pressure-stabilizing and institute State comparison circuit and first voltage regulator circuit connection, also, the second end of the 8th resistance also with second capacitor First end connection, the second end ground connection of second capacitor.
Optionally, second voltage regulator circuit further includes the second zener diode, the anode of second zener diode Ground connection, the cathode of second zener diode are connect with the second end of the 8th resistance.
Optionally, the switching circuit includes: third bleeder circuit and metal-oxide-semiconductor；
The input terminal of the third bleeder circuit is connect as the input terminal of the switching circuit with the detection circuit, institute The output end for stating third bleeder circuit is connect with the grid of the metal-oxide-semiconductor, and the source electrode of the metal-oxide-semiconductor and the input cathode connect It connects, also, the source electrode ground connection of the metal-oxide-semiconductor, the drain electrode of the metal-oxide-semiconductor are connect with the output negative pole.
Optionally, the third bleeder circuit includes the 9th resistance and the tenth resistance；
The first end of 9th resistance is connect as the input terminal of the third bleeder circuit with the detection circuit, institute The second end for stating the 9th resistance is connect as the output end of the third bleeder circuit with the grid of the metal-oxide-semiconductor, also, described The second end of 9th resistance is also connect with the first end of the tenth resistance, the second end ground connection of the tenth resistance.
Optionally, the switching circuit includes: third capacitor and the 4th capacitor；
The first end of the third capacitor is connect with the grid of the metal-oxide-semiconductor, the second end of the third capacitor with it is described The source electrode of metal-oxide-semiconductor connects, and the first end of the 4th capacitor is connect with the drain electrode of the metal-oxide-semiconductor, and the second of the 4th capacitor End is connect with the source electrode of the metal-oxide-semiconductor.
In second aspect, the embodiment of the invention provides a kind of battery, including shell, it is contained in the intracorporal battery core of the shell With the power supply circuit being electrically connected with the battery core, the battery further includes protection circuit as described above, the power supply circuit with The protection circuit electrical connection.
In the third aspect, the embodiment of the invention provides a kind of aircraft, including fuselage, the machine being connected with the fuselage Arm, the power device set on the horn and the battery set on the fuselage, the battery are above-mentioned battery, and the battery is used It powers in the aircraft.
In each embodiment of the present invention, when protecting the detection circuit of circuit to detect power supply circuit exception, the inspection Slowdown monitoring circuit exports low level, so that the switching circuit of protection circuit is in an off state, it is different to prevent to cut off current supply circuit Normal electric power thus supplied causes the damage of product and product component, such as causes the damage of battery or aircraft and its component, from And improve the service life of battery and aircraft.On the one hand, the protection circuit is without dedicated overvoltage protection chip, because This, can effectively save cost；On the other hand, can by adjusting protection circuit detection circuit and switching circuit parameter with Different power supply needs are adapted to, to effectively improve the adaptability and flexibility of protection.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of structural schematic diagram for protecting circuit provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another protection circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of circuit diagram for protecting circuit provided in an embodiment of the present invention；
Fig. 4 is the circuit diagram of another protection circuit provided in an embodiment of the present invention；
Fig. 5 is the resistance value and vs. temperature table of negative tempperature coefficient thermistor provided in an embodiment of the present invention；
Fig. 6 is the circuit diagram of another protection circuit 100a provided in an embodiment of the present invention；
Fig. 7 is the circuit diagram of another protection circuit 100b provided in an embodiment of the present invention；
Fig. 8 is a kind of schematic diagram of battery provided in an embodiment of the present invention；
Fig. 9 is a kind of schematic diagram of aircraft provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.Obviously, described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", " right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff is identical.It is specific that description is intended merely in the term used in the description of invention herein Embodiment purpose, it is not intended that in limitation the present invention.Term " and or " used herein includes one or more phases Any and all combinations of the listed item of pass.In addition, involved in the various embodiments of the present invention described below To technical characteristic can be combined with each other as long as they do not conflict with each other.
In circuit design, in order to avoid the damage of product and its component, it will usually which to abnormal electrical power supply the case where carries out Protection processing, to extend product service life etc..For example, carrying out over-voltage guarantor in time when the abnormal conditions such as over-voltage, excess temperature occur Shield, overheat protector etc., to avoid component in the route caused by the abnormal conditions such as over-voltage, excess temperature etc. due to fever, breakdown Burn out the generation of situation even on fire.
Currently, the conventional way for carrying out protection processing for abnormal conditions has: being realized using dedicated overvoltage protection chip Protection；Using processor detection, control to realize protection etc..
For by the way of special chip, on the one hand, its is at high cost；On the other hand, due to special chip, its parameter exists It has usually been fixedly installed before factory, therefore, the adaptability and flexibility of protection are inadequate.
And for the mode of processor detection, control, although the adaptability and flexibility of protection can be improved, Since it is using software, process control, the program mals such as program fleet, bolt-lock are easy to appear, reliability is not high.
Based on the above situation, the embodiment of the invention provides a kind of protection circuit, battery and aircraft, wherein the protection Circuit is for being monitored power supply circuit.The protection circuit includes: detection circuit and the switch connecting with detection circuit electricity Road.When the detection circuit detects power supply circuit exception, the detection circuit exports low level, so that the switching circuit It is in an off state, to cut off current supply circuit, to prevent abnormal electric power thus supplied from causing the damage of product and product component, such as The damage of battery or aircraft etc. and its component is caused, to improve the service life of battery and aircraft.
On the one hand, the protection circuit is without dedicated protection chip, therefore, can effectively save cost；It is another Aspect, can be by adjusting the detection circuit of protection circuit and the parameter of switching circuit to adapt to different power supply needs, to have Effect improves the adaptability and flexibility of protection.
Further, since the protection circuit is the hardware device built by electronic component, therefore, can avoid because of program It controls and leads to the program mals such as program fleet, bolt-lock, improve the reliability of protection.
With reference to the accompanying drawing, protection circuit, battery and aircraft provided in an embodiment of the present invention are specifically described.
Referring to Fig. 1, being that the embodiment of the present invention provides a kind of schematic diagram for protecting circuit.Wherein, which can To be suitable for various products or electronic equipment etc., for example, (such as mobile phone, can be worn plate for battery, aircraft, automobile, terminal device Wear equipment), domestic electric appliance (such as air-conditioning, refrigerator), to monitor the electric power thus supplied of various products or electronic equipment, thus Guarantee the normal operation of product or electronic equipment.
Below using battery as the example of product or electronic equipment, to protection circuit 100 provided in an embodiment of the present invention into Row specifically describes.
Wherein, the protection circuit 100 is for being monitored power supply circuit.The protection circuit 100 includes: detection circuit 10 With switching circuit 20.Wherein, which connect with the switching circuit 20.
When the detection circuit 10 detects power supply circuit exception, the detection circuit 10 exports low level, so that institute It states switching circuit 20 to be in an off state, to cut off current supply circuit, to prevent abnormal electric power thus supplied from causing product and product member The damage of device, such as the damage of battery or aircraft and its component is caused, to improve the use longevity of battery and aircraft Life.
Therefore protection circuit 100 provided in an embodiment of the present invention, can be saved effectively without dedicated protection chip Cost-saving；It on the other hand, can be by adjusting the detection circuit 10 of protection circuit 100 and the parameter of switching circuit 20 to adapt to difference Power supply need, to effectively improve the adaptability and flexibility of protection.
As shown in Fig. 2, the protection circuit 100 further include: input anode IN+, output cathode OUT+, input cathode IN-, is defeated Cathode OUT- out.Wherein, supply voltage is applied to the input anode IN+, also, input anode by the power supply circuit IN+ is connect with the output cathode OUT+.
Wherein, which can be to be various types of for providing electric energy for various electrical equipments to drive electricity consumption to set The circuit of standby work.For example, the power supply circuit (CPU power supply circuit) of processor, motor feed circuit etc..For example, passing through motor Power supply circuit is that the motor of aircraft is powered, and is rotated with driving motor, to drive propeller to rotate, to realize flying for aircraft Row.
The input anode IN+ of protection circuit 100 refers to the port connecting with the anode of the power supply circuit, protects circuit 100 Input cathode IN- be and refer to the port that connect with the cathode of the power supply circuit, the output cathode OUT+ of protection circuit 100 and defeated Cathode OUT- is two ports for connecting electrical equipment out, that is, electrical equipment is connected to output cathode OUT+ and output Between cathode OUT-.
Wherein, by the connection of power supply circuit, protection circuit 100 and electrical equipment to form current supply circuit.Supply voltage It is exported by power supply circuit, after overprotection circuit 100 carries out protection processing, is input to electrical equipment, to drive electrical equipment work Make.Also, power supply circuit can receive the input of external power supply.External power supply obtains power supply electricity after being input to power supply circuit processing Pressure.Protection processing includes: that current supply circuit is cut off when there is abnormal electrical power supply；Alternatively, keeping current supply circuit when powering normal Conducting, is input to electrical equipment for supply voltage, so that electrical equipment be driven to work.
For example, battery includes battery core, power supply circuit and protection circuit 100 by taking battery as an example, battery core and power supply circuit connect It connects, the voltage input that battery core is exported to power supply circuit.The voltage of battery core output obtains power supply electricity after power supply circuit is handled Pressure.Also, power supply circuit is connect with protection circuit 100, which is input to the protection circuit 100.
Specifically, the anode of battery core is connect with the anode of power supply circuit, the cathode of battery core and the cathode of power supply circuit are connected. Also, the anode of power supply circuit is connect with the input anode IN+ of protection circuit 100, the cathode and protection circuit 100 of power supply circuit The IN- connection of input cathode, supply voltage is input to the input anode IN+ of the protection circuit 100.Also, electrical equipment Between connection and the output cathode OUT+ and output negative pole OUT- of the protection circuit 100, which passes through protection circuit 100 Processing after be input to electrical equipment, for the power supply for electrical equipment.
For example, supply voltage is exported to electricity consumptions such as the dynamical systems for the aircraft connecting with the battery when powering normal In module, to drive the power system operational, to realize the flight of aircraft.Alternatively, protecting circuit when abnormal electrical power supply 100 cutting current supply circuits, the electricity consumptions modules such as the dynamical system for the aircraft connecting with the battery are damaged to prevent abnormal electrical power supply Or battery itself.
It should be noted that above-mentioned battery can be any kind of battery, as lithium battery, ickel-cadmium cell, nickel-metal hydride battery, Lead-acid battery etc..And the battery is to be connected in series by several single batteries (battery core).Battery is using several monomers electricity Pond is connected in series to meet the power demands of various electrical equipments.For example, meeting the motor lift-off of the aircraft such as unmanned plane Power need.For example, the battery includes 4 or 4 or more single batteries, this 4 or 4 or more single battery strings Connection connection, to meet different power demands.
In some implementations, above-mentioned detection circuit 10 is connect with switching circuit 20 specifically includes: the detection circuit 10 include detection input 101 and detection output 102.Wherein, the detection input 101 and input anode IN+ and The output cathode OUT+ connection；The switching circuit 20 is connect with the detection output 102.
Also, the switching circuit 20 is connected between input cathode IN- and output negative pole OUT-.Due to being supplied for cutting off The switching circuit 20 of electrical circuit is placed between input cathode IN- and output negative pole OUT-, therefore, for when abnormal electrical power supply occurs Switching component (such as metal-oxide-semiconductor, triode switch element) in switching circuit 20 for cutting off current supply circuit can be selected Internal resistance is lower, the lower switching component of price, to reduce the kwh loss of protection circuit 100, further saves cost, special It Shi He not high current power supply circuit.
It should be noted that in some embodiments, the switching circuit 20 be also connected to input positive IN+ with it is defeated Out between anode OUT+.When the switching circuit 20 is set between input anode IN+ and output cathode OUT+, switching circuit 20 can avoid the more thorough of power supply circuit shutdown some electricity leakage power dissipations etc., reduce the power consumption of route.
Detection below with reference to Fig. 3 and Fig. 4, to protection circuit 100 provided in an embodiment of the present invention and protection circuit 100 Circuit 10 and switching circuit 20 are specifically described.
Referring to Fig. 3, the detection circuit 10 includes: abnormal Acquisition Circuit 103, reference circuit 104 and comparison circuit 105.Wherein, the exception Acquisition Circuit 103 and reference circuit 104 are connect with comparison circuit 105；Also, the comparison circuit 105 It is connect with switching circuit 20.
Specifically, the comparison circuit 105 includes first comparing input terminal 1051, second comparing input terminal 1052 and compare Output end 1053.Wherein, abnormal Acquisition Circuit 103 input terminal 1051 compared with described first connects, the reference circuit 104 connections of input terminal 1052 compared with described second, the relatively output end 1053 are connect with the switching circuit 20.
When detecting the power supply circuit exception, the comparison output end 1053 of the comparison circuit 105 exports low level, So that the switching circuit 20 is in an off state, to cut off current supply circuit.
Wherein, the abnormal first voltage exported by the abnormal Acquisition Circuit 103 of the power supply circuit and the benchmark The second voltage that circuit 104 is exported is determined.That is, the abnormal Acquisition Circuit 103 is exported by comparing circuit 105 First voltage and the second voltage that is exported of the reference circuit 104 be compared, according to the result of the comparison, it is determined whether supply Circuit whether there is the case where abnormal electrical power supply.
For example, comparison circuit 105 exports high level when first voltage is greater than or equal to second voltage, work as first voltage When less than second voltage, comparison circuit 105 exports low level；Alternatively, comparing when first voltage is greater than or equal to second voltage Circuit 105 exports low level, and when first voltage is less than second voltage, comparison circuit 105 exports high level.
Wherein, the power supply circuit includes at least one following abnormal conditions extremely: the power supply circuit occurred mildly Over-voltage occurs for the power supply circuit.
Due to being influenced by internal or external factor, there can be a variety of abnormal conditions usually in power supply process.For example, hair The abnormal conditions such as raw over-voltage, excess temperature.And the protection circuit 100 provided through the embodiment of the present invention can be in power supply circuit exception Power supply circuit excess temperature occurs, power supply circuit occurs the abnormal conditions such as over-voltage and is protected.
Specifically, it is described exception Acquisition Circuit 103 include: excess temperature Acquisition Circuit 1031, overvoltage acquisition circuit 1032 and First bleeder circuit 1033.Wherein, the excess temperature Acquisition Circuit 1031 and overvoltage acquisition circuit 1032 with first bleeder circuit 1033 connections.
Specifically, the excess temperature Acquisition Circuit 1031 input terminal and the overvoltage acquisition circuit 1032 input terminal with The input anode IN+ connection, the input of the output end of the excess temperature Acquisition Circuit 1031 and first bleeder circuit 1033 End connection, the output end of first bleeder circuit 1033 is connect with the output end of the overvoltage acquisition circuit 1032, also, institute State output end and the comparison circuit 105 of the output end as the abnormal Acquisition Circuit 103 of the first bleeder circuit 1033 First compares the connection of input terminal 1051.
In some implementations, which includes temperature sensor RT1.
Wherein, the first end of the temperature sensor RT1 as the excess temperature Acquisition Circuit 1031 input terminal with it is described Input anode IN+ connection, output end and institute of the second end of the temperature sensor RT1 as the excess temperature Acquisition Circuit 1031 State the input terminal connection of the first bleeder circuit 1033.
Wherein, temperature sensor RT1 can be any suitable temperature sensor.For example, temperature sensor RT1 can Think negative tempperature coefficient thermistor (Negative Temperature Coefficient, NTC).The negative temperature coefficient heat-sensitive Resistance has temperature higher, the lower characteristic of resistance value.
Wherein, the resistance value Yu temperature of the negative tempperature coefficient thermistor correspond, and specifically may refer to bear in Fig. 5 The resistance value and vs. temperature table of temperature coefficient thermistor.It can be reflected in time by negative tempperature coefficient thermistor Temperature in power supply process, to carry out overheat protector in time.
Referring back to Fig. 3, the overvoltage acquisition circuit 1032 includes: the first zener diode ZD1 and first resistor R1.Its In, which connect with first resistor R1.
Specifically, the cathode of the first zener diode ZD1 as the overvoltage acquisition circuit 1032 input terminal with The input anode IN+ connection, the second end of the first zener diode ZD1 and the first end of the first resistor R1 connect It connects, output end and first bleeder circuit of the second end of the first resistor R1 as the overvoltage acquisition circuit 1032 1033 output end connection.
Wherein, the characteristic that there is the first zener diode ZD1 one-way conduction and more than pressure voltage when to be reversed breakdown.? That is, in normal operating conditions, when the voltage of the first zener diode ZD1 anode is greater than the voltage of cathode, the first pressure stabilizing two Pole pipe ZD1 conducting；And when the voltage for being applied to the first zener diode ZD1 cathode is greater than the pressure resistance of the first zener diode ZD1 When value, the first zener diode ZD1 is reversed breakdown.Therefore, confession can timely be reflected by the first zener diode ZD1 Supply voltage in electric process, to carry out overvoltage protection in time.
It follows that the overpressure value of protection circuit 100 can be by adjusting described first provided by the embodiment of the present invention The pressure voltage of zener diode ZD1 realizes, that is, can by selecting the first zener diode ZD1 of different pressure voltages, with Adapt to different power supply needs.
It, can be effective using first zener diode ZD1 since the response time of the first zener diode ZD1 is very short Improve the response speed of protection circuit 100.And faster reaction speed can effectively prevent when over-voltage occurs, and rapidly cut off Current supply circuit avoids product and related component from being damaged.In addition, the first zener diode ZD1's is low in cost, it can be effective Save the cost.
It should be noted that first zener diode ZD1 can be any suitable diode, as long as can be realized list To conducting, more than pressure voltage when be reversed breakdown namely forward conduction, reverse blocking is reversed when more than pressure voltage and hits It wears.For example, first zener diode ZD1 can be germanium diode (Ge pipe) and silicon diode (Si pipe) etc..
In some implementations, first zener diode ZD1 can be the diode of any model, for example, this One zener diode ZD1 can be the diode etc. of model BZX384-B16.
Wherein, the first resistor R1 is used for current limliting, to prevent first device in excessively high circuit damage comparison circuit 105 Part, so that it is guaranteed that the normal work of comparison circuit 105.The resistance value of first resistor R1 can be chosen according to actual needs, for example, The resistance value of first resistor R1 is 1K Ω.
Wherein, first bleeder circuit 1033 includes second resistance R2 and 3rd resistor R3.Wherein, second resistance R2 with 3rd resistor R3 connection.
Specifically, input terminal and the mistake of the first end of the second resistance R2 as first bleeder circuit 1033 The output end of warm Acquisition Circuit 1031 connects, and the second end of the second resistance R2 is as the defeated of first bleeder circuit 1033 Outlet compared with described first input terminal 1051 connect, also, the second end of the second resistance R2 also with the 3rd resistor The first end of R3 connects, and the second end of the 3rd resistor R3 is grounded GND.
Wherein, being applied to first to compare 1051 voltage of input terminal is also the voltage being applied on 3rd resistor R3.
Wherein, the reference circuit 104 includes: the second bleeder circuit 1041.Second bleeder circuit 1041 is electric compared with Road 105 connects.
Specifically, the input terminal of second bleeder circuit 1041 is connect with the input anode IN+, second partial pressure Output end with described second compared with input terminal 1052 connection of the output end of circuit 1041 as the reference circuit 104.
In some implementations, second bleeder circuit 1041 includes the 4th resistance R4 and the 5th resistance R5.Wherein, 4th resistance R4 and the 5th resistance R5 connection.
Specifically, the first end of the 4th resistance R4 as second bleeder circuit 1041 input terminal with it is described defeated Enter positive IN+ connection, the second end of the 4th resistance R4 is as the output end of second bleeder circuit 1041 and described the Two compare the connection of input terminal 1052, also, the second end of the 4th resistance R4 also connects with the first end of the 5th resistance R5 It connects, the second end of the 5th resistance R5 is grounded GND.
Wherein, the comparison circuit 105 includes: comparator U1.Two input terminals of comparator U1 respectively with abnormal acquisition Circuit 103 and reference circuit 104 connect, and the output end of comparator U1 is connect with switching circuit 20.
It is adopted specifically, the inverting input terminal of the comparator U1 compares input terminal 1051 as described first with the exception Collector 103 connects, and the normal phase input end of the comparator U1 compares input terminal 1052 and benchmark electricity as described second Road 104 connects, and the output end of the comparator U1 is connect as the relatively output end 1053 with the switching circuit 20.
It should be noted that comparator U1 for any appropriate voltage comparator or can realize voltage comparing function Chip.That is, the voltage when its normal phase input end can be achieved greater than inverting input terminal for any appropriate in comparator U1 When voltage, high level is exported, when the voltage of its normal phase input end is less than the voltage of inverting input terminal, exports low level voltage Comparator or voltage chips.For example, comparator U1 can be TP2271 or other voltage comparable chips etc..
In some embodiments, in order to the inverting input terminal of comparator U1 input smooth steady voltage, such as Fig. 4 institute Show, the comparison circuit 105 further includes first capacitor C1.
Wherein, the first end of the first capacitor C1 is connect with the inverting input terminal of the comparator U1, first electricity The second end for holding C1 is grounded GND.The first capacitor C1 is for realizing filter function, so that the inverting input terminal of comparator U1 obtains Obtain the voltage of smooth steady.
In some embodiments, in order to prevent critical value when fluctuation interference, the detection circuit 10 further include feedback electricity Road 106, specific visible Fig. 4.
Wherein, the input terminal of the feed circuit 106 output end 1053 compared with the comparison circuit 105 connects, institute State output end connection of input terminal 1052 compared with the second of comparison circuit 105 of feed circuit 106.
Specifically, the input terminal of the feed circuit 106 is connect with the output end of the comparator U1 of comparison circuit 105, institute The normal phase input end for stating the output end of feed circuit 106 and the comparator U1 of comparison circuit 105 is connect.
Wherein, feed circuit 106 is for realizing hysteresis function, specifically, when power supply circuit is restored to just by abnormal conditions When the critical point often powered, feed circuit 106 is by dragging down the voltage of the normal phase input end of comparator U1, so that comparator U1 Output end will not export high level at once, but after delay after a period of time namely the inverting input terminal of comparator U1 When voltage is reduced to a certain extent again, comparator U1 could export high level, so that switching circuit 20 is in the conductive state, thus So that current supply circuit is connected.
It can effectively prevent when critical value (such as critical-temperature or critical voltage) by the feed circuit 106, Comparator U1 output high level repeatedly or low level, so as to cause the on or off of switching circuit 20 repeatedly, and cause to supply Mains ripple in electrical circuit, to damage product or related component.
As shown in figure 4, the feed circuit 106 includes first diode D1 and the 6th resistance R6, the first diode The cathode of D1 as the feed circuit 106 input terminal compared with the comparison circuit 105 1053 (such as comparator of output end The output end of U1) it connects, the anode of the first diode D1 is connect with the first end of the 6th resistance R6, the 6th electricity Hinder R6 second end as the feed circuit 106 output end compared with the second of comparison circuit 105 input terminal 1052 (such as than Compared with the normal phase input end of device U1) connection.
When power supply circuit exception, the output end of the comparator U1 exports low level, so that at the switching circuit 20 In off state, to cut off current supply circuit.Then, when power supply circuit by abnormal restoring to normal critical value when, at this point, comparing The output end of device U1 exports low level, due to the presence of first diode D1 and the 6th resistance R6 feed circuit 106 constituted, the One diode D1 forward conduction, so the voltage of the normal phase input end of comparator U1 can be by the 5th resistance R5 and the 6th resistance R6 simultaneously The resistance of connection drags down, thus when power supply circuit by abnormal restoring to normal critical value when after comparator U1 will not pull up a horse High level is exported, but after delay after a period of time namely the voltage of the inverting input terminal of comparator U1 is reduced to one again When determining degree, comparator U1 could export high level, so that switching circuit 20 is in the conductive state, so that current supply circuit is led It is logical.It, can be with that is, feed circuit 106 composed by first diode D1 and the 6th resistance R6 plays the effect of a hysteresis Effectively prevent fluctuation interference when critical value.
It should be noted that first diode D1 can be any suitable diode, unidirectionally led as long as can be realized Logical function namely forward conduction, reverse blocking.For example, first diode D1 can be germanium diode (Ge pipe) and silicon Diode (Si pipe) etc..
In some implementations, first diode D1 can be the diode of any model, for example, the one or two pole Pipe D1 can be the diode etc. of model 1N4148WS.
In some embodiments, interference of the fluctuation of supply voltage to the detection of 10 pairs of exceptions of detection circuit in order to prevent, The detection circuit 10 further include: voltage hold circuit 107.
Wherein, the voltage hold circuit 107 includes keeping input terminal 1071 and holding output end 1072.It is described to keep defeated Enter end 1071 to connect with the input anode IN+, the holding output end 1072 respectively with the excess temperature Acquisition Circuit 1031 The connection of the input terminal of input terminal and the reference circuit 104.
The voltage hold circuit 107 is used to carry out steady pressure treatment to the supply voltage, to obtain reference voltage, and will The reference voltage is input to the input terminal of the excess temperature Acquisition Circuit 1031 and the input terminal of the reference circuit 104.
In some implementations, which includes the first voltage regulator circuit 1073.Wherein, described first Voltage regulator circuit 1073 is connect with the excess temperature Acquisition Circuit 1031 and the reference circuit 104 respectively.First voltage regulator circuit 1073 for carrying out the first steady pressure treatment to the supply voltage for being input to the voltage hold circuit 107, to obtain the benchmark electricity Pressure.
Wherein, which is the reference standard of the comparison of the voltage of comparison circuit 105.Specifically, reference voltage is defeated Enter into reference circuit 104, the second ratio of the voltage input after the voltage division processing of reference circuit 104 to comparison circuit 105 Compared with input terminal 1052, it is compared with the voltage of the input terminal 1051 compared with the first of comparison circuit 105.That is, reference voltage Voltage after the voltage division processing of reference circuit 104 is the reference voltage of comparison circuit 105.
It should be noted that the size of the reference voltage can according to need and be adjusted, for example, the reference voltage can be with For 2.5V, 3V, 3.5V etc..That is, the size of the reference voltage is unrestricted.
In some implementations, first voltage regulator circuit 1073 includes the 7th resistance R7 and controllable voltage-stabiliser tube U2.
The first end of the 7th resistance R7 is connect with the input anode IN+, the second end conduct of the seven resistance R7 Reference the pole (pole R) for keeping output end 1072 and the controllable voltage-stabiliser tube U2 of the voltage hold circuit 107 and it is described controllably The cathode (pole K) of voltage-stabiliser tube U2 connects, and the anode (pole A) of the controllable voltage-stabiliser tube U2 is grounded GND.
Wherein, the 7th resistance R7 is used for current limliting, to prevent the controllable voltage-stabiliser tube U2 of excessively high circuit damage, so that it is guaranteed that The normal work of controllable voltage-stabiliser tube U2.The controllable voltage-stabiliser tube U2 is used to carry out the first steady pressure treatment to the supply voltage, with Obtain the reference voltage.
For example, the first steady pressure treatment is carried out to the supply voltage by controllable voltage-stabiliser tube U2 when mains ripple, from And be that comparison circuit 105 inputs stable reference voltage, for example, the reference voltage of input 2.5V.
Wherein, which can be any suitable chip for realizing controllable voltage stabilizing function.For example, this is controllable Voltage-stabiliser tube U2 can be TL431 or other controllable voltage stabilizing chips etc..The resistance value of 7th resistance R7 can be selected according to actual needs It takes, for example, the resistance value of the 7th resistance R7 is 20K Ω.
Since comparison circuit 105 and the first voltage regulator circuit 1073 are also required to the driving of voltage, in order to ensure detection electricity Comparison circuit 105 and the first voltage regulator circuit 1073 in road 10 can work normally, it is also desirable to be comparison circuit 105 and the first pressure stabilizing The driving of circuit 1073 provides stable voltage.
Based on this, in some embodiments, the voltage hold circuit 107 further includes the second voltage regulator circuit 1074.Wherein, Second voltage regulator circuit 1074 includes pressure stabilizing input terminal and output end of pressure-stabilizing.The pressure stabilizing input terminal and the input anode IN + connection, the output end of pressure-stabilizing are connect with the comparison circuit 105 and the first voltage regulator circuit 1073 respectively.
Second voltage regulator circuit 1074 is used to carry out the second steady pressure treatment to the supply voltage, to obtain work electricity Pressure, the operating voltage is for driving the comparison circuit 105 and the first voltage regulator circuit 1073 to work.Pass through second pressure stabilizing electricity Road 1074 is to provide stable operating voltage for comparison circuit 105 and the first voltage regulator circuit 1073.
It should be noted that when the voltage hold circuit 107 includes the second voltage regulator circuit 1074, above-mentioned 7th resistance The first end of R7 is connect with the input anode IN+, refer to the first end of the 7th resistance R7 by the second voltage regulator circuit 1074 with The input anode IN+ connection.
In some implementations, second voltage regulator circuit 1074 includes: the second diode D2, the 8th resistance R8 and Two capacitor C2.
Wherein, the anode of the second diode D2 is connect as the pressure stabilizing input terminal with the input anode IN+, institute The cathode for stating the second diode D2 is connect with the first end of the 8th resistance R8, and the second end of the 8th resistance R8 is as institute It states output end of pressure-stabilizing to connect with comparison circuit 105 and the first voltage regulator circuit 1073, also, the second end of the 8th resistance R8 is also It is connect with the first end of the second capacitor C2, the second end of the second capacitor C2 is grounded GND.
When the mains ripple, the energy storage effect of the second capacitor C2 and the single-pass characteristic of the second diode D2 make Second voltage regulator circuit 1074 is still able to maintain the effect that the operating voltage of output is not fluctuated in a short time, thus described in guaranteeing The normal work of comparison circuit 105 and the first voltage regulator circuit 1073.
Also, when the supply voltage is raised suddenly, due to the metering function of the 8th resistance R8, to guarantee second The operating voltage that voltage regulator circuit 1074 is exported is maintained in a reasonable voltage range, to guarantee the comparison circuit 105 and first voltage regulator circuit 1073 normal work.
Also, the second diode D2 has unidirectional single-pass characteristic, therefore, counnter attack may be implemented and fill function, that is, going out When being now reversely connected, if the anode of power supply circuit connect with the input cathode IN- of the protection circuit 100, the cathode of power supply circuit and this When protecting the input anode IN+ connection of circuit 100, current supply circuit is cut off, to prevent counter fill.
From the foregoing, it will be observed that the effect of the second voltage regulator circuit 1074 is to guarantee in the voltage environment of acute variation, guarantee to protect The core circuit of protection circuit 100, such as the normal work of comparison circuit 105, so that it is guaranteed that the reliability of protection circuit 100.
In some embodiments, in order to prevent the overtension of the second voltage regulator circuit 1074 output and to damage the comparison electric Road 105 and the first voltage regulator circuit 1073, and further ensure the voltage stabilization etc. of the second voltage regulator circuit 1074 output, it please refers to 4, second voltage regulator circuit 1074 further includes the second zener diode ZD2.
Wherein, the plus earth GND of the second zener diode ZD2, the cathode of the second zener diode ZD2 with The second end of the 8th resistance R8 connects.
It should be noted that second zener diode ZD2 can be any suitable diode, as long as can be realized steady Press function.For example, second zener diode ZD2 can be germanium diode (Ge pipe) and silicon diode (Si pipe) etc..
In some implementations, second zener diode ZD2 can be the diode of any model, for example, this Two zener diode ZD2 can be the diode etc. of model BZX384-B18.
It should also be noted that, in some other embodiments, the 7th resistance R7, controllable voltage-stabiliser tube described in foregoing circuit It is one or more in U2, the second diode D2, the 8th resistance R8, the second zener diode ZD2 and the second capacitor C2 can also be by The substitution of other electronic components.For example, replacing above-mentioned 7th resistance R7, the 8th resistance R8 with slide rheostat.
Also, the operating voltage exported by the second voltage regulator circuit 1074 can be changed by adjusting each electronic component parameter Become the voltage value of the operating voltage of output.For example, increasing the resistance value of the 8th resistance R8 and reducing the voltage value of operating voltage；It selects Other kinds of zener diode restrains operating voltage output of operating voltage in the excessively high environment of supply voltage more Deng.
Referring back to Fig. 3, the switching circuit 20 includes: third bleeder circuit 201 and metal-oxide-semiconductor Q1.Wherein, third divides Circuit 201 is connected with metal-oxide-semiconductor Q1.Wherein, metal-oxide-semiconductor Q1 can be N-channel MOS pipe.
Specifically, input terminal and the inspection of the input terminal of the third bleeder circuit 201 as the switching circuit 20 Slowdown monitoring circuit 10 connects, and the output end of the third bleeder circuit 201 is connect with the grid (pole G) of the metal-oxide-semiconductor Q1, the MOS The source electrode (pole S) of pipe Q1 is connect with the input cathode IN-, also, source electrode (pole the S) ground connection of the metal-oxide-semiconductor Q1, the MOS The drain electrode (pole D) of pipe Q1 is connect with the output negative pole OUT-.
In some implementations, the third bleeder circuit 201 includes: the 9th resistance R9 and the tenth resistance R10.Its In, the 9th resistance R9 is connect with the tenth resistance R10.
Specifically, input terminal and the inspection of the first end of the 9th resistance R9 as the third bleeder circuit 201 Slowdown monitoring circuit 10 connects, output end and the metal-oxide-semiconductor of the second end of the 9th resistance R9 as the third bleeder circuit 201 The grid of Q1 connects, also, the second end of the 9th resistance R9 is also connect with the first end of the tenth resistance R10, described The second end of tenth resistance R10 is grounded GND.
In some embodiments, in order to the grid source electrode of metal-oxide-semiconductor Q1, hourglass source electrode input smooth steady voltage, such as Fig. 4 institute Show, the switching circuit 20 includes: third capacitor C3 and the 4th capacitor C4.
The first end of the third capacitor C3 is connect with the grid of the metal-oxide-semiconductor Q1, the second end of the third capacitor C3 It being connect with the source electrode of the metal-oxide-semiconductor Q1, the first end of the 4th capacitor C4 is connect with the drain electrode of the metal-oxide-semiconductor Q1, and described The second end of four capacitor C4 is connect with the source electrode of the metal-oxide-semiconductor Q1.The third capacitor C3, the 4th capacitor C4 are used to realize filter Wave energy, so that the grid source electrode of metal-oxide-semiconductor Q1, hourglass source electrode obtain the voltage of smooth steady.
It should be noted that in some other embodiments, above-mentioned MOS can also can be achieved with other in above-mentioned metal-oxide-semiconductor Q1 The device of the function of pipe Q1 is substituted, it is not limited to cited device in figure.For example, the metal-oxide-semiconductor Q1 can also be P ditch Road metal-oxide-semiconductor；Alternatively, substituting above-mentioned metal-oxide-semiconductor Q1 with triode.
Wherein, which can be negative-positive-negative transistor.The connection of the base stage (pole B) of the triode in circuit Structure is identical as the connection structure of the grid of metal-oxide-semiconductor Q1 in circuit；Connection knot of the emitter (pole E) of the triode in circuit Structure is identical as the connection structure of the source electrode of metal-oxide-semiconductor Q1 in circuit, the connection structure of the circuit of the collector (pole C) of the triode Identical as the connection structure of metal-oxide-semiconductor Q1 drain electrode in circuit, therefore, details are not described herein, specifically refers to foregoing description.
It is the working principle of protection circuit 100 provided in an embodiment of the present invention below:
Please refer to Fig. 3 or Fig. 4, it is assumed that the offer stable reference voltage of the first voltage regulator circuit 1073 is 2.5V, first resistor The resistance value of R1 is 1K Ω, the resistance value of second resistance R2 is 2K Ω, the resistance value of 3rd resistor R3 is 10K Ω, the 4th resistance The resistance value of R4 is 12K Ω, the resistance value of the 5th resistance R5 is 10K Ω.
For carrying out overvoltage protection, when power supply circuit works normally namely when over-voltage does not occur for power supply circuit；Or Person, for carrying out overheat protector, when power supply circuit works normally namely when excess temperature does not occur for power supply circuit, it is assumed that ring 25 DEG C of border temperature, the corresponding resistance value of negative tempperature coefficient thermistor RT1 about 100K Ω, and it is defeated to combine above-mentioned hypothesis that can obtain The voltage entered to the normal phase input end of comparator U1 is about 1.136V, and the voltage for being input to the inverting input terminal of comparator U1 is big About 0.223V, at this point, comparator U1 exports high level, wherein due to the presence of the second zener diode ZD2, so that input Operating voltage to comparator U1 can be stablized in a safe range (less than the pressure voltage of metal-oxide-semiconductor Q1), such as stablize in 18V Left and right, so the voltage that the output end of comparator U1 exports also is basically stable at 18V or so, so that metal-oxide-semiconductor Q1 will not be burnt out.This When, metal-oxide-semiconductor Q1 is in the conductive state, so that entire current supply circuit is in the conductive state.Further, since first diode D1's deposits It counter will not be poured on the normal phase input end of comparator U1 in the high level of the output end output of, comparator U1.
When overvoltage protection occurs for circuit, that is, supply voltage is more than predetermined voltage threshold, for example, with the first pressure stabilizing two For pole pipe ZD1 is BZX384-B16, breakdown voltage VZ is between 15.7V-16.3V, so the overvoltage protection of overvoltage protection Value is approximately equal to (VZ+ (1.136-0.227)) between V, namely 16.609V-17.209V.Therefore, when supply voltage is more than When the range of 16.609V-17.209V, the voltage of the normal phase input end of comparator U1 is less than the voltage of normal phase input end, comparator U1 exports low level and to cut off current supply circuit, namely overheat protector has occurred so that metal-oxide-semiconductor Q1 is in an off state.
When excess temperature occurs for power supply circuit, that is, temperature is more than preset temperature threshold, for example, when temperature is more than 80 DEG C, by The resistance value Biao Ke get of the different temperatures of the negative temperature coefficient heat-sensitive RT1 resistance of Fig. 5, when temperature is equal to 80 DEG C, negative temperature coefficient The resistance value of temperature-sensitive RT1 is 10K Ω, and the voltage of the normal phase input end of comparator U1 and the voltage of normal phase input end are roughly equal, Namely it is critical temperature value that temperature, which is equal to 80 DEG C,.Therefore, when temperature is more than 80 DEG C, the voltage of the normal phase input end of comparator U1 Less than the voltage of normal phase input end, comparator U1 exports low level, so that metal-oxide-semiconductor Q1 is in an off state, to cut off power supply Circuit, namely overheat protector has occurred.
In addition, when power supply circuit is restored to critical point (critical temperature value or the critical voltage of normal power supply by abnormal conditions Value) when, since the output end of comparator U1 exports low level, so the voltage of the normal phase input end of comparator U1 can be by the 5th electricity Resistance R5 and the resistance of the 6th resistance R6 parallel connection drag down that (10%) rule of thumb data, voltage about reduce, so when warm Comparator U1 will not immediately export high level after degree is lowered by 80 DEG C, probably can be reduced to 75 DEG C of Shi Caihui until temperature Export high level；Alternatively, when supply voltage by 16.609V-17.209V to lower after comparator U1 will not immediately export it is high Level probably can just export high level until supply voltage is reduced to 16.509V-17.109V, so that power supply circuit restores It works normally.
Feed circuit 106 composed by first diode D1 and the 6th resistance R6 plays the effect of a hysteresis, can be with It effectively prevents when critical temperature value or critical voltage value, comparator U1 output high level repeatedly or low level, from And lead to the on or off of switching circuit 20 repeatedly, and the mains ripple in current supply circuit is caused, to damage product Or related component.
It should be noted that the preset temperature threshold is that the critical value of excess temperature occurs, which is to occur The critical point of pressure.That is, the predetermined voltage threshold is for defining whether over-voltage occurs, the preset temperature threshold for define whether Excess temperature occurs.
Specifically, showing the case where there are over-voltages, when supply voltage is less than when supply voltage is greater than predetermined voltage threshold Or when being equal to predetermined voltage threshold, show non-over-voltage；When temperature is greater than preset temperature threshold, show the case where there are excess temperatures, When temperature is less than or equal to preset temperature threshold, show non-over-voltage.If over-voltage or excess temperature occurs, damage of product may cause And component in route etc. because fever, breakdown due to burn out even it is on fire.For example, leading to cell damage or causing to rely on the battery Aircraft aircraft bombing of power supply etc..
Wherein, the predetermined voltage threshold, preset temperature threshold can be adjusted according to the actual situation, to adapt to different confessions Electricity needs and different power demands.
It should also be noted that, the voltage value of the overvoltage protection of protection circuit 100 can adjust according to demand, it is also not necessarily limited to The numerical value of example, specific voltage protection range can pressure voltage, first resistor R1 by adjusting the first zener diode ZD1 Resistance value, the resistance value of the 4th resistance R4 be 12K Ω, the resistance value of the 5th resistance R5 be 10K Ω realize.
Also, protecting the temperature value of the temperature protection of circuit 100 can also adjust according to demand, be also not necessarily limited to the number of example Value, specific temperature protection range can be by adjusting negative tempperature coefficient thermistor NTC, the resistance value of second resistance R2, the Resistance value, the resistance value of the 4th resistance R4, the resistance value of the 5th resistance R5 of three resistance R3 is realized.
In addition, controllable voltage-stabiliser tube U2 can also be a two-in-one device with comparator U1.For example, as shown in fig. 6, the guarantor Protection circuit 100a and the distinctive points of above-mentioned protection circuit 100 are that controllable voltage-stabiliser tube U2 and comparator U1 are a two-in-one devices Part, namely the function of controllable voltage-stabiliser tube U2 and the function of comparator U1 can integrate on a chip, for example, being integrated in model The chip U1a of AP4310.
In some other embodiments, above-mentioned controllable voltage-stabiliser tube U2 can also be can be achieved with other in above-mentioned controllable voltage-stabiliser tube U2 The device of function substituted, it is not limited to cited device in figure.For example, with low pressure difference linear voltage regulator (low Dropout regulator, LDO) replace above-mentioned controllable voltage-stabiliser tube U2.For example, as shown in fig. 7, the protection circuit 100b with it is upper The distinctive points for stating protection circuit 100 are that low pressure difference linear voltage regulator replaces above-mentioned controllable voltage-stabiliser tube U2.
In embodiments of the present invention, when the detection circuit 10 detects power supply circuit exception, the detection circuit 10 Low level is exported, so that the switching circuit 20 is in an off state, to cut off current supply circuit, to prevent abnormal electric power thus supplied The damage of product and product component is caused, such as causes the damage of battery or aircraft and its component, to improve battery And the service life of aircraft.
Therefore protection circuit 100 provided in an embodiment of the present invention, can be saved effectively without dedicated protection chip Cost-saving；It on the other hand, can be by adjusting the detection circuit 10 of protection circuit 100 and the parameter of switching circuit 20 to adapt to difference Power supply need, to effectively improve the adaptability and flexibility of protection.
Also, since protection circuit 100 is the pure hardware device built using diode, metal-oxide-semiconductor, resistance etc., one Aspect can avoid leading to the program mals such as program fleet, bolt-lock because of process control, improves the reliability of protection, on the other hand may be used With the effective response speed for improving protection circuit 100, save the cost, especially suitable for over-voltage, overheat protector.And protection electricity The electric elements on road 100 are less, compare and save route space, the product for smaller bulk is a good selection.
In addition, the protection circuit 100 is due to having the function of hysteresis, so being avoided to a certain extent in excess temperature, over-voltage When critical point, comparator U1 output high level repeatedly or low level, so as to cause the on or off of switching circuit 20 repeatedly, And the mains ripple in current supply circuit is caused, to damage product or related component.
Referring to Fig. 8, being a kind of schematic diagram of battery provided in an embodiment of the present invention.Wherein, the battery 800 can be Manganese-zinc battery, lead storage battery, lithium battery or other types power supply module etc..The battery 800 include: shell (not shown), Be contained in the intracorporal battery core 810 of the shell and the input anode B+ of the power supply circuit 820, battery that are electrically connected with the battery core 810, The output cathode PACK+ of battery, the input cathode B- of battery, the output negative pole PACK- of battery and protection as described above are electric Road 100.Wherein, power supply circuit 820 is connect with protection circuit 100.
Needing to illustrate the is, the quantity of the battery core 810 can be several, that is, in the present embodiment, the battery core 810 Quantity it is unrestricted.Wherein, several battery cores are connected in series, to adapt to different power supply needs.
In some implementations, anode of the anode of battery core 810 as input the anode B+ and power supply circuit 820 of battery Connection, also, the anode of power supply circuit 820 inputs positive IN+ with protection circuit 100 and connect, and the cathode of battery core 810 is as battery Input cathode B- connect with the cathode of power supply circuit 820, also, the cathode of power supply circuit 820 and the protection input of circuit 100 are negative IN- connection in pole protects output cathode PACK+ of the output cathode OUT+ of circuit 100 as battery, protects the output of circuit 100 Output negative pole PACK- of the cathode OUT- as battery is power supply for electrical equipment to connect electrical equipment.
The switching circuit 20 of the protection circuit 100 is connected to the output negative pole of input the cathode B- and battery of battery Between PACK-.
Wherein, the input anode B+ of the battery is total anode of battery 800, also the as ceiling voltage end of battery 800.It should The input cathode B- of battery is total negative terminal of battery 800, also the as minimum voltage end of battery 800.
The output cathode PACK+ of the battery is the cathode output end of battery 800.The output cathode PACK+ of the battery is also The positive charged terminal mouth of battery 800.The output negative pole PACK- of the battery is the cathode output end of battery 800, also, the battery Output negative pole PACK- be battery 800 cathode charging port.
When the electric discharge of battery 800 and when situation without exception, discharge current by battery input anode B+, output cathode PACK+, The output negative pole PACK- of battery is returned to through loads such as electrical equipments.
It should be noted that in some embodiments, the protection circuit 100 is also connected to the input anode of battery Between B+ and the output cathode PACK+ of battery.
In embodiments of the present invention, the protection circuit 100 of battery 800 can protect the abnormal conditions such as excess temperature over-voltage Shield.
Also, when between the input cathode B- and output negative pole PACK- of battery for protecting circuit 100 to be connected to battery, For switching component (such as metal-oxide-semiconductor, triode in the switching circuit 20 when abnormal electrical power supply occurs for cutting off current supply circuit Equal switch elements) it can select that internal resistance is lower, the lower switching component of price, to reduce the electricity damage of protection circuit 100 Consumption, further saves cost, is particularly suitable for high current power supply circuit.
Referring to Fig. 9, being a kind of schematic diagram of aircraft provided in an embodiment of the present invention.Wherein, which wraps Include: fuselage (not shown), the horn (not shown) being connected with the fuselage, set on the horn power device 910 and be set to The battery of the fuselage.Wherein, the battery of aircraft 900 can be above-mentioned battery 800.The battery 800 is used to fly to be described Row device 900 is powered.
Therefore the battery 800, which may not need, can effectively save cost using dedicated protection chip；On the other hand, Can by adjusting protection circuit 100 detection circuit 10 and switching circuit 20 parameter to adapt to different power supply needs, thus Effectively improve the adaptability and flexibility of protection.
Wherein, which can be unmanned plane, unmanned boat or other movable fixtures etc..By taking unmanned plane as an example, The unmanned plane can be rotor craft (rotorcraft), for example, passing through air-driven more rotors by multiple pushing meanss Aircraft, the embodiment of the present invention are not limited to this, and unmanned plane is also possible to other types of unmanned plane, as fixed-wing nobody Machine, unmanned airship, umbrella wing unmanned plane, flapping wing unmanned plane etc..
Wherein, wherein battery 800 connects with power device 910, flight control system, holder, image collecting device respectively It connects, to provide electric power for power device 910, flight control system, holder, image collecting device.For example, being by battery 800 Power device 910 and flight control system provide electric power, to guarantee the normal work of power device 910 and flight control system Make, to realize the flight of aircraft 900, to complete specified aerial mission.
In addition, power device 910 is set to the horn of aircraft 900, flight control system is set to the machine of aircraft 900 In body, holder is installed on the fuselage of aircraft 900, and flight control system can be with power device 910, holder, image collector It sets and is coupled, to realize communication.
Power device 910 may include electron speed regulator (referred to as electricity adjust), one or more propellers and with one Or the corresponding one or more motors of multiple propellers, wherein motor is connected between electron speed regulator and propeller, motor It is arranged on the horn of corresponding aircraft 900 with propeller.
Electron speed regulator is used to receive the driving signal of flight control system generation, and provides driving electricity according to driving signal It flows to motor, to control the revolving speed of motor.Motor for driving propeller to rotate, thus for aircraft 900 flight provide it is dynamic Power, the power make aircraft 900 can be realized the movements of one or more freedom degrees.In certain embodiments, aircraft 900 It can be around one or more rotary shaft rotations.For example, above-mentioned rotary shaft may include roll axis, translation shaft and pitch axis.It can With understanding, motor can be direct current generator, can also be with alternating current generator.In addition, motor can be brushless motor, can also have Brush motor.
Flight control system may include flight controller and sensor-based system.Flight controller is connected with sensor-based system.
Sensor-based system is used to measure the posture information of aircraft 900, i.e. location information and state of the aircraft 900 in space Information, for example, three-dimensional position, three-dimensional perspective, three-dimensional velocity, three-dimensional acceleration and three-dimensional angular velocity etc..Sensor-based system for example may be used With include gyroscope, electronic compass, Inertial Measurement Unit (Inertial Measurement Unit, IMU), visual sensor, At least one of sensors such as Global Navigation Satellite System and barometer.For example, Global Navigation Satellite System can be the whole world Positioning system (Global Positioning System, GPS).Flight controller is used to control the flight of aircraft 900, example It such as, can be according to the flight for the posture information control aircraft 900 that sensor-based system measures.
It is understood that flight controller can control aircraft 900 according to the program instruction finished in advance, Aircraft 900 can also be controlled by responding one or more control instructions from other equipment.
Holder may include electricity reconciliation motor.Wherein, the electricity reconciliation motor connection of holder.Holder is acquired for carrying image Device.Flight controller can pass through the movement of electricity reconciliation motor control holder.
Optionally, in some other embodiments, holder can also include controller, for passing through the electric motor that reconciles of control To control the movement of holder.It is understood that holder can be independently of aircraft 900, or one of aircraft 900 Point.It is understood that the motor of holder can be direct current generator, it can also be with alternating current generator.In addition, the motor of holder can be Brushless motor, can also be with brush motor.It will also be appreciated that holder can be located at the top of fuselage, fuselage can also be located at Bottom.
Image collecting device can be camera or video camera etc. for acquiring the device of image, and image collecting device can be with It communicates with flight control system, and is shot under the control of flight control system.
It is understood that the name of above-mentioned each component part for aircraft 900 is only the purpose for mark, and It should not be construed as the limitation to the embodiment of the present invention.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；At this It under the thinking of invention, can also be combined between the technical characteristic in above embodiments or different embodiment, step can be with It is realized with random order, and there are many other variations of different aspect present invention as described above, for simplicity, they do not have Have and is provided in details；Although the present invention is described in detail referring to the foregoing embodiments, the ordinary skill people of this field Member is it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of skill Art feature is equivalently replaced；And these are modified or replaceed, each reality of the application that it does not separate the essence of the corresponding technical solution Apply the range of a technical solution.

Claims (24)

1. a kind of protection circuit, for being monitored to power supply circuit characterized by comprising
Detection circuit；
Switching circuit is connect with the detection circuit；
When the detection circuit detects the power supply circuit exception, the detection circuit exports low level, so that described open Powered-down road is in an off state, to cut off current supply circuit.
2. protection circuit according to claim 1, which is characterized in that the protection circuit further include: input anode, output Anode, input cathode, output negative pole, wherein supply voltage is applied to the input anode, also, institute by the power supply circuit Input anode is stated to connect with the output cathode；
The detection circuit includes detection input and detection output, and the detection input is positive and described with the input Output cathode connection；
The switching circuit is connect with the detection output, also, the switching circuit is connected to input cathode and output is negative Between pole.
3. protection circuit according to claim 2, which is characterized in that the detection circuit includes: abnormal Acquisition Circuit, base Quasi- circuit and comparison circuit；
The comparison circuit includes first comparing input terminal, second comparing input terminal and compare output end；The abnormal acquisition electricity Road input terminal compared with described first connects, and reference circuit input terminal compared with described second connects, described relatively to export End is connect with the switching circuit；
When detecting the power supply circuit exception, the comparison output end of the comparison circuit exports low level, so that described open Powered-down road is in an off state, to cut off current supply circuit；
Wherein, the abnormal first voltage exported by the abnormal Acquisition Circuit of the power supply circuit and reference circuit institute are defeated Second voltage out is determined.
4. protection circuit according to claim 3, which is characterized in that the power supply circuit includes at least one or less extremely Abnormal conditions: the power supply circuit occurred the mild power supply circuit and over-voltage occurs.
5. protection circuit according to claim 3 or 4, which is characterized in that the exception Acquisition Circuit includes: excess temperature acquisition Circuit, overvoltage acquisition circuit and the first bleeder circuit；
The input terminal of the excess temperature Acquisition Circuit and the input terminal of the overvoltage acquisition circuit are connect with the input anode, institute The output end for stating excess temperature Acquisition Circuit is connect with the input terminal of first bleeder circuit, the output end of first bleeder circuit It is connect with the output end of the overvoltage acquisition circuit, also, the output end of first bleeder circuit is as the abnormal acquisition The output end of circuit input terminal compared with described first connects.
6. protection circuit according to claim 5, which is characterized in that the excess temperature Acquisition Circuit includes temperature sensor；
The first end of the temperature sensor is connect as the input terminal of the excess temperature Acquisition Circuit with the input anode, described The second end of temperature sensor is connect as the output end of the excess temperature Acquisition Circuit with the input terminal of first bleeder circuit.
7. protection circuit according to claim 5 or 6, which is characterized in that the overvoltage acquisition circuit includes: the first pressure stabilizing Diode and first resistor；
The cathode of first zener diode is connect as the input terminal of the overvoltage acquisition circuit with the input anode, institute The second end for stating the first zener diode is connect with the first end of the first resistor, and the second end of the first resistor is as institute The output end for stating overvoltage acquisition circuit is connect with the output end of first bleeder circuit.
8. according to the described in any item protection circuits of claim 5-7, which is characterized in that first bleeder circuit includes second Resistance and 3rd resistor；
The first end of the second resistance is as the input terminal of first bleeder circuit and the output of the excess temperature Acquisition Circuit Hold end connection, the second end of the second resistance as first bleeder circuit output end compared with described first input terminal Connection, also, the second end of the second resistance is also connect with the first end of the 3rd resistor, and the second of the 3rd resistor End ground connection.
9. according to the described in any item protection circuits of claim 3-8, which is characterized in that the reference circuit includes the second partial pressure Circuit；
The input terminal of second bleeder circuit is connect with the input anode, and the output end of second bleeder circuit is as institute State output end input terminal connection compared with described second of reference circuit.
10. protection circuit according to claim 9, which is characterized in that second bleeder circuit include the 4th resistance and 5th resistance；
The first end of 4th resistance is connect as the input terminal of second bleeder circuit with input anode, and described the Output end with described second compared with input terminal connection of the second end of four resistance as second bleeder circuit, also, it is described The second end of 4th resistance is also connect with the first end of the 5th resistance, the second end ground connection of the 5th resistance.
11. according to the described in any item protection circuits of claim 3-10, which is characterized in that the comparison circuit includes comparing Device；
The inverting input terminal of the comparator compares input terminal as described first and connect with the abnormal Acquisition Circuit, the ratio Compare input terminal as described second compared with the normal phase input end of device to connect with the reference circuit, the output end of the comparator is made It is connect for the relatively output end with the switching circuit.
12. protection circuit according to claim 11, which is characterized in that the comparison circuit further includes first capacitor, institute The first end for stating first capacitor is connect with the inverting input terminal of the comparator, the second end ground connection of the first capacitor.
13. according to the described in any item protection circuits of claim 3-12, which is characterized in that the detection circuit further includes feedback Circuit, the input terminal of feed circuit output end compared with the comparison circuit connect, the output end of the feed circuit Input terminal connects compared with the second of the comparison circuit.
14. protection circuit according to claim 13, which is characterized in that the feed circuit includes first diode and Six resistance, the cathode of the first diode as the feed circuit input terminal compared with the comparison circuit output end Connection, the anode of the first diode are connect with the first end of the 6th resistance, the second end conduct of the 6th resistance Second of comparison circuit described in the output end of the feed circuit compares input terminal connection.
15. according to the described in any item protection circuits of claim 5-14, which is characterized in that the detection circuit further include: electricity Press holding circuit；
The voltage hold circuit includes keeping input terminal and keeping output end, and the holding input terminal and input anode are even It connects, the holding output end is connect with the input terminal of the input terminal of the excess temperature Acquisition Circuit and the reference circuit respectively；
The voltage hold circuit is used to carry out steady pressure treatment to the supply voltage, to obtain reference voltage, and by the base Quasi- voltage input is to the input terminal of the excess temperature Acquisition Circuit and the input terminal of the reference circuit.
16. protection circuit according to claim 15, which is characterized in that the voltage hold circuit includes the first pressure stabilizing electricity Road；
The output end of first voltage regulator circuit is defeated with the input terminal of the excess temperature Acquisition Circuit and the reference circuit respectively Enter end connection, first voltage regulator circuit is used to carry out the first steady pressure treatment to the supply voltage, to obtain the benchmark electricity Pressure；
Wherein, first voltage regulator circuit include the 7th resistance and controllable voltage-stabiliser tube, the first end of the 7th resistance with it is described Input anode connection, the second end of the 7th resistance is as the holding output end of the voltage hold circuit and described controllable steady The connection of the cathode of the reference pole of pressure pipe and the controllable voltage-stabiliser tube, the plus earth of the controllable voltage-stabiliser tube.
17. protection circuit according to claim 16, which is characterized in that the voltage hold circuit further includes the second pressure stabilizing Circuit, second voltage regulator circuit include pressure stabilizing input terminal and output end of pressure-stabilizing；
The pressure stabilizing input terminal is connect with the input anode, and the output end of pressure-stabilizing is steady with the comparison circuit and first respectively Volt circuit connection, second voltage regulator circuit is used to carry out the second steady pressure treatment to the supply voltage, to obtain operating voltage, The operating voltage is for driving the comparison circuit and the first voltage regulator circuit to work.
18. protection circuit according to claim 17, which is characterized in that second voltage regulator circuit includes: the two or two pole Pipe, the 8th resistance and the second capacitor；
The anode of second diode is connect as the pressure stabilizing input terminal with the input anode, second diode Cathode is connect with the first end of the 8th resistance, and the second end of the 8th resistance is as the output end of pressure-stabilizing and the ratio Connected compared with circuit and first voltage regulator circuit, also, the second end of the 8th resistance also with second capacitor first End connection, the second end ground connection of second capacitor.
19. protection circuit according to claim 18, which is characterized in that second voltage regulator circuit further includes the second pressure stabilizing Diode, the plus earth of second zener diode, the cathode of second zener diode and the 8th resistance Second end connection.
20. -19 described in any item protection circuits according to claim 1, which is characterized in that the switching circuit includes: third Bleeder circuit and metal-oxide-semiconductor；
The input terminal of the third bleeder circuit is connect as the input terminal of the switching circuit with the detection circuit, and described The output end of three bleeder circuits is connect with the grid of the metal-oxide-semiconductor, and the source electrode of the metal-oxide-semiconductor is connect with the input cathode, and And the source electrode ground connection of the metal-oxide-semiconductor, the drain electrode of the metal-oxide-semiconductor are connect with the output negative pole.
21. protection circuit according to claim 20, which is characterized in that the third bleeder circuit include the 9th resistance and Tenth resistance；
The first end of 9th resistance is connect as the input terminal of the third bleeder circuit with the detection circuit, and described The second end of nine resistance is connect as the output end of the third bleeder circuit with the grid of the metal-oxide-semiconductor, also, the described 9th The second end of resistance is also connect with the first end of the tenth resistance, the second end ground connection of the tenth resistance.
22. the protection circuit according to claim 20 or 21, which is characterized in that the switching circuit includes: third capacitor With the 4th capacitor；
The first end of the third capacitor is connect with the grid of the metal-oxide-semiconductor, the second end of the third capacitor and the metal-oxide-semiconductor Source electrode connection, the first end of the 4th capacitor connect with the drain electrode of the metal-oxide-semiconductor, the second end of the 4th capacitor and institute State the source electrode connection of metal-oxide-semiconductor.
23. a kind of battery, including shell, the power supply circuit for being contained in the intracorporal battery core of the shell and being electrically connected with the battery core, It is characterized in that, the battery further includes such as the described in any item protection circuits of claim 1-22, the power supply circuit and institute State protection circuit electrical connection.
24. a kind of aircraft, which is characterized in that including fuselage, the horn being connected with the fuselage, set on the power of the horn Device and battery set on the fuselage, which is characterized in that the battery is battery described in claim 23, and the battery is used It powers in the aircraft.
CN201811644530.4A 2018-12-29 2018-12-29 A kind of protection circuit, battery and aircraft Pending CN109546612A (en)

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