CN109245244A - Charging circuit, charging method, electronic equipment and storage medium - Google Patents
Charging circuit, charging method, electronic equipment and storage medium Download PDFInfo
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- CN109245244A CN109245244A CN201811348651.4A CN201811348651A CN109245244A CN 109245244 A CN109245244 A CN 109245244A CN 201811348651 A CN201811348651 A CN 201811348651A CN 109245244 A CN109245244 A CN 109245244A
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- Prior art keywords
- charging
- charging interface
- impedance
- interface
- value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the present application provides a kind of charging circuit, charging method, electronic equipment and storage medium, which includes that charging interface, detection module, impedance obtain module and control module.Charging interface is for connecting external recharging apparatus；Detection module is connect with charging interface, and detection module is used to detect the connection status of charging interface；Impedance obtains module and connect with detection module, when the connection status of charging interface is not-connected status, impedance obtains the first impedance value that module obtains charging interface, and when the connection status of charging interface is connected status, impedance obtains the second impedance value that module obtains charging interface；Control module obtains module with impedance and connect, and obtains the first impedance value and the second impedance value, and when the difference of the first impedance value and the second impedance value is greater than preset difference value threshold value, stopping is charged by charging interface.Protect charging interface.
Description
Technical field
This application involves electronic technology field more particularly to a kind of charging circuit, charging method, electronic equipment and deposit
Storage media.
Background technique
Currently, the charging interface of electronic equipment such as mobile phone has been able to integrate data transmission and charge function.In electricity
Sub- equipment by charging interface with outside charging unit connect charged when, since the spacing between charging interface pin compares
It is small, when charging interface has foreign matter or feed liquor body, it is be easy to cause micro-short circuit, and then be easily damaged charging interface.
Summary of the invention
The embodiment of the present application provides a kind of charging circuit, charging method, electronic equipment and storage medium, can be effective
Whether accurate detection charging interface is short-circuit, and is protected.
The embodiment of the present application provides a kind of charging circuit comprising:
Charging interface, the charging interface is for connecting external recharging apparatus；
Detection module, the detection module are connect with the charging interface, and the detection module is for detecting the charging
The connection status of interface；
Impedance obtains module, and the impedance obtains module and connect with the detection module, when the connection of the charging interface
When state is not-connected status, the impedance obtains the first impedance value that module obtains the charging interface, when the charging
When the connection status of mouth is connected status, the impedance obtains the second impedance value that module obtains the charging interface；
Control module, the control module obtains module with the impedance and connect, and obtains first impedance value and institute
The second impedance value is stated, when the difference of first impedance value and second impedance value is greater than preset difference value threshold value, is stopped logical
The charging interface is crossed to charge.
The embodiment of the present application provides a kind of charging method, is applied to device to be charged, the device to be charged
Including charging interface, the charging interface is for connecting external recharging apparatus；The described method includes:
Obtain the connection status of the charging interface；
When the connection status is not-connected status, the first impedance value of the charging interface is obtained；
When the connection status is connected status, the second impedance value of the charging interface is obtained；
When the difference of first impedance value and second impedance value is greater than preset difference value threshold value, stop by described
Charging interface charges.
The embodiment of the present application also provides a kind of electronic equipment comprising charging circuit and battery, the charging circuit with
The battery connection, charging circuit charging circuit as described above.
The embodiment of the present application also provides a kind of computer readable storage mediums, are stored thereon with computer program, described
The step of charging management method as described above is realized when program is executed by processor.
Charging circuit, charging method, electronic equipment and storage medium provided by the embodiments of the present application, can detecte and fill
Electrical interface is in the first impedance value of not connected external recharging apparatus and the second impedance value of connection external recharging apparatus.When
When the difference of one impedance value and the second impedance value is zero or is less than preset difference value threshold value, charging interface is normal, charges normal.When
When the difference of one impedance value and the second impedance value is greater than preset difference value threshold value, charging interface may have foreign matter or feed liquor body, lead
Micro-short circuit in charging interface is caused, at this point, stopping charging by the charging interface, protects charging interface.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described.It should be evident that the drawings in the following description are only some examples of the present application, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram of the first state of electronic equipment provided by the embodiments of the present application.
Fig. 2 is another structural schematic diagram of the first state of electronic equipment provided by the embodiments of the present application.
Fig. 3 is the structural schematic diagram of the second state of electronic equipment provided by the embodiments of the present application.
Fig. 4 is another structural schematic diagram of the second state of electronic equipment provided by the embodiments of the present application.
Fig. 5 is the structural schematic diagram of charging equipment provided by the embodiments of the present application and charging unit.
Fig. 6 is the structural representation of temperature detecting element and control module in charging equipment provided by the embodiments of the present application
Figure.
Fig. 7 is the structural representation of temperature detecting element and charging interface in charging equipment provided by the embodiments of the present application
Figure.
Fig. 8 is another structural schematic diagram of charging equipment provided by the embodiments of the present application and charging unit.
Fig. 9 is the another structural schematic diagram of charging equipment provided by the embodiments of the present application and charging unit.
Figure 10 is the flow diagram of charging method provided by the embodiments of the present application.
Figure 11 is the module frame chart schematic diagram of electronic equipment provided by the embodiments of the present application.
Specific embodiment
Schema is please referred to, wherein identical component symbol represents identical component, the principle of the application is to implement one
It is illustrated in computing environment appropriate.The following description be based on illustrated by the application specific embodiment, should not be by
It is considered as limitation the application other specific embodiments not detailed herein.
The embodiment of the present application provides a kind of charging circuit, charging method, electronic equipment and storage medium.It will divide below
It is not described in detail.Wherein electronic equipment can be the equipment such as smart phone, tablet computer, can also be game station, AR
(Augmented Reality, augmented reality) equipment, audio playing apparatus, video play device etc..
Fig. 1 is the structural schematic diagram of the first state of electronic equipment provided by the embodiments of the present application referring to FIG. 1 to FIG. 4,
Fig. 2 is another structural schematic diagram of the first state of electronic equipment provided by the embodiments of the present application, and Fig. 3 mentions for the embodiment of the present application
The structural schematic diagram of second state of the electronic equipment of confession, Fig. 4 are the second state of electronic equipment provided by the embodiments of the present application
Another structural schematic diagram.Wherein, first state can not open the state of camera function for electronic equipment 100, such as can be
Standby mode, bright screen do not open camera state.Wherein, the second state is shape when electronic equipment 100 opens camera function
State.
In some embodiments, electronic equipment 100 may include display screen 12, electronic circuit board 13, battery 14, shell
15, front camera 161, rear camera 162.It should be noted that electronic equipment 100 is not limited to the above content.
In some embodiments, electronic equipment 100 can also include sliding equipment 18, and sliding equipment 18 and shell 15 connect
It connects, sliding equipment 18 can be slided relative to shell.Front camera 161 and rear camera 162 are arranged on sliding equipment 18,
And it is located at opposite two sides.
When electronic equipment 100 is in first state, sliding equipment 18 is in original state, i.e. sliding equipment 18 is located at shell
It is interior.
When electronic equipment 100 is in the second state, i.e., when opening camera function, sliding equipment 18 skids off shell 15, sliding
Motivation structure 18 is equipped with front camera 161 and rear camera 162.It is preposition to take the photograph when sliding equipment 18 does not skid off shell 15
As first 161 and rear camera 162 are hidden in shell, when electronic equipment 100 is the second state, sliding equipment 18 skids off shell
15, front camera 161 can be used and rear camera 162 is taken pictures, imaged.
Wherein, display screen 12 is mounted in shell 15.Display screen 12 is electrically connected on electronic circuit board 13, to form electronics
The display surface of equipment 100.Display screen 12 can cover whole for the shape of rule, such as rectangular parallelepiped structure, display screen 12
On the display surface of a electronic equipment 100, that is, realize the full screen display of electronic equipment 100.
In some embodiments, display screen 12 can for liquid crystal display (Liquid Crystal Display, LCD) or
Person's organic light-emitting diode (OLED) display screen (Organic Light-Emitting Diode, OLED).
Wherein, electronic circuit board 13 is mounted in shell 15, and electronic circuit board 13 can be the mainboard of electronic equipment 100,
Motor, microphone, loudspeaker, earphone interface, Universal Serial Bus Interface, preposition camera shooting are can integrate on electronic circuit board 13
First 161, in the functional units such as rear camera 162, receiver 171, range sensor, ambient light sensor and processor
One, it is two or more.
It should be noted that the meaning of " plurality " is two or more, unless otherwise bright in the description of the present application
It is really specific to limit.
In some embodiments, electronic circuit board 13 can be screwed in shell 15 by screw, can also be using buckle
Mode card be fitted in shell 15.It should be noted that the embodiment of the present application electronic circuit board 13 is specifically fixed in shell 15
Mode be not limited to this, can be with other way, such as by way of buckling and screw fixes jointly.
Wherein, electronic equipment 100 can also include cover board, and cover board is installed on display screen 12, to cover display screen 12.Lid
Plate can be transparent glass cover plate, so that 12 euphotic cover plate of display screen is shown.In some embodiments, cover board can be use
Glass cover-plate made of the materials such as sapphire.
Wherein, shell 15 can form the exterior contour of electronic equipment 100.In some embodiments, shell 15 can be
The metals such as metal shell component, such as magnesium alloy, stainless steel.It should be noted that the material of the embodiment of the present application shell 15 is simultaneously
It is without being limited thereto, such as: shell 15 can be plastic casing, ceramic shell, glass shell etc..
It should be noted that the electronic equipment of the application can also only have first state, i.e. electronic equipment does not slide
Mechanism 18, electronic equipment have non-display area, front camera 161, receiver 171, range sensor, ambient light sensor etc.
It can be set in non-display area.
Referring to Fig. 5, Fig. 5 is the structural schematic diagram of charging equipment provided by the embodiments of the present application and charging unit.To
Charging equipment 300 includes charging circuit, and charging circuit includes charging interface 310, detection module 320, impedance acquisition 340 and of module
Control module 380.Charging equipment 300 can be the electronic equipment in above-described embodiment.Charging unit 200 can be adaptation
The devices such as device, charging base.
Wherein, charging interface 310 is for connecting external recharging apparatus 200.Charging interface 310 can be universal serial bus
(Universal Serial Bus, USB) interface.Specifically, charging interface 310 can be Micro USB interface or Type-C
Interface etc., certainly, charging interface 310 or other interfaces.Charging interface 310 connects external charging by charging cable line
Device 200, and electric energy is obtained from external recharging apparatus 200.External recharging apparatus 200 can be the devices such as adapter.
Detection module 320 is connect with the charging interface 310, and the detection module 320 is for detecting the charging interface
310 connection status.
Connection status includes connected status and not-connected status, and connected status indicates that charging interface 310 is filled with outside
Electric installation 200 connects, and not-connected status then indicates that charging interface 310 is not connect with charging unit 200.
Specifically, can by the special pin (the CC pin in such as figure) or idle pin of charging interface 310 or
Special test pin detection.For example, charging interface 310 is Type-C interface, pass through a CC pin in Type-C interface
It detects, when Type-C interface does not connect adapter by charging cable, which is low level, and Type-C interface passes through charging
After line connects adapter, adapter gives one high level of the CC pin.In this way, can be detected by judging the level of CC pin
The connection status of charging interface 310.CC pin is low level, then is not-connected status, and CC pin is high level, then to have connected
State.
Impedance obtains module 340 and connect with the detection module 320, when the connection status of the charging interface 310 is not
When connection status, the impedance obtains the first impedance value that module 340 obtains the charging interface 310, when the charging interface
When 310 connection status is connected status, the impedance obtains the second impedance that module 340 obtains the charging interface 310
Value.
The impedance value of the impedance acquisition available charging interface 310 of module 340.Specifically, detection resistance can be passed through
It is realized with detection power supply.Detection power supply is stable power supply, and detection power supply, which exports stable voltage value V0, V0, to be
3.3V, 1.8V etc., detection resistance one end connect the power input pin VBUS of charging interface 310, and the other end of detection resistance connects
Detection power supply is connect, the resistance value of detection resistance is R0.Then the voltage value V1 for obtaining power input pin VBUS, according to R=R0*
The impedance value of charging interface 310 can be calculated in (V1/ (V0-V1)).
Using above-mentioned formula, in not-connected status, the impedance obtains module 340 and obtains the charging interface 310
First impedance value, when the connection status of the charging interface 310 is connected status, the impedance obtains module 340 and obtains
Second impedance value of the charging interface 310.
Control module 380 obtains module 340 with the impedance and connect, and obtains first impedance value and second resistance
Anti- value stops filling by described when the difference of first impedance value and second impedance value is greater than preset difference value threshold value
Electrical interface 310 charges.
Control module 380 obtains the first impedance value and the second impedance value, then asks the first impedance value and the second impedance value
Difference says charging interface 310 when the difference of first impedance value and second impedance value is less than preset difference value threshold value
Normally, it can be charged by charging interface 310.When the difference of first impedance value and second impedance value is greater than in advance
If when difference threshold, charging interface 310 may have foreign matter or feed liquor body, lead to micro-short circuit in charging interface 310, at this point, stopping
It is only charged by the charging interface 310, protects charging interface 310.
In the description of the present application, it is to be understood that term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more feature.
Fig. 6 and Fig. 7 are please referred to, Fig. 6 is temperature detecting element and control in charging equipment provided by the embodiments of the present application
The structural schematic diagram of module, Fig. 7 are temperature detecting element and charging interface in charging equipment provided by the embodiments of the present application
Structural schematic diagram.The charging circuit further includes temperature detecting element 350, and the temperature detecting element 350 is for obtaining described fill
First temperature information of electrical interface 310.Temperature detecting element 350 can change it according to the temperature change of charging interface 310
Corresponding resistance value, to be believed according to the first temperature that the variation of 350 resistance value of temperature detecting element obtains current charging interface 310
Breath.
Wherein, the pinouts of charging interface 310 is shown in figure.Wherein, temperature detecting element 350 can use negative temperature
Coefficient resistance, wherein negative tempperature coefficient thermistor (Negative Temperature Coefficient, NTC) is
The material that resistance have exponent relation reduction, thermistor phenomenon with negative temperature coefficient can be risen with temperature.Temperature detection
Element 350 can be set in charging interface 310, and the housing outer surface in charging interface 310 also can be set.
The control module 380 connect with the temperature detecting element 350 and obtains first temperature information, and obtains
First temperature information, the control module 380 obtain from mapping table corresponding default according to first temperature information
Difference threshold.
First temperature information of the acquisition charging interface 310 of temperature detecting element 350.Temperature detecting element 350 can be negative
Temperature coefficient of resistance, single thermistor, the components such as temperature sensor.Temperature detecting element 350 can obtain charging in real time
First temperature information of mouth 310.
In some embodiments, the adjacent charging interface 310 of temperature detecting element 350.Temperature detecting element 350 can with fill
Electrical interface 310 is arranged in the same area, is not directly connected between the two, but apart from close, can acquisition charging promptly and accurately
First temperature information of interface 310.
In some embodiments, temperature detecting element 350 is bonded charging interface 310.Temperature detecting element 350 can with fill
Electrical interface 310 is directly connected to or is connected by heat conducting element (such as thermally conductive sheet), can promptly and accurately obtain charging interface 310
First temperature information.
In some embodiments, the quantity of temperature detecting element 350 is at least 2, each temperature detecting element 350 with
One detection pin of control module 380 connects.
Each temperature detecting element 350 can work independently, and obtain the first temperature information of charging interface 310 respectively.
Each temperature detecting element 350 is connect with a detection pin of control module 380 respectively, in this way, control module 380 can obtain
The first temperature information of at least two is taken, then when any one first temperature information is more than reliability temperature threshold, stops charging.
Can also be with, when at least one first temperature information is more than reliability temperature threshold, and at least one first temperature information is less than peace
Total temperature threshold value, but it is smaller with the difference of reliability temperature threshold when (such as less than 10 degrees Celsius or less than 5 degrees Celsius), stop filling
Electricity.Maloperation caused by prevent single temperature detecting element 350 from damaging.Wherein, reliability temperature threshold can be a default
Value, such as 50 degrees Celsius, 60 degrees Celsius, 70 degrees Celsius.
Please continue to refer to Fig. 6, detection pin, the Yi Jitong of one end link control module 380 of the temperature detecting element 350
Cross resistance R2 or R3 connection power vd D, the other end ground connection of temperature detecting element 350.Temperature detecting element 350 can be with temperature sensitive electricity
Hinder RT1 or RT2.
Wherein, power vd D can be the power supply improved inside charging equipment 300, such as 5V, 3.3V.It needs to illustrate
It is that the detection pin of control module 380 can draw for an analog-to-digital conversion (Analog-to-Digital Converter, ADC)
Foot.
Charging interface 310 during the charging process can temperature raising.The reason of temperature increases may be charging interface 310 itself
Fever causes temperature to increase, it is also possible to which battery or charging circuit temperature increase, and influence the raising of 310 temperature of charging interface.Charging
After 310 temperature of interface increases, the impedance of charging interface 310 can also change therewith and the resistance value of detection resistance can also become
Change.What a mapping table can be preset, the corresponding preset difference value threshold value of different temperatures is stored up in mapping table, then basis
First temperature information of current charging interface 310 is obtained corresponding preset difference value threshold value out of mapping table, is become with compensation temperature
Change 310 resistance difference of bring charging interface.Because temperature change brings the first impedance value and the difference of the second impedance value to become larger,
Corresponding adjustment (as increased) preset difference value threshold value at this time, keeps it more reasonable, prevents from judging by accident.
In some other embodiment, the resistance value of the corresponding detection resistance of different temperatures can also be stored in mapping table
It is interior, then according to the first temperature information of current charging interface 310, the resistance of corresponding detection resistance is obtained out of mapping table
Value, then in conjunction with R=R0* (V1/ (V0-V1)) formula, obtains corresponding first impedance value and the second impedance value.
Referring to Fig. 8, Fig. 8 is another structural representation of charging equipment provided by the embodiments of the present application and charging unit
Figure.The charging circuit further includes first switching element 360.First switching element 360 includes that first input end 361, first is defeated
Outlet 362 and the first control terminal 363, first input end 361 are connect with the power input pin VBUS of charging interface 310, and first
Output end 362 is grounded, and the first control terminal 363 is used to control first input end 361 and the first output end 362 is turned on or off.From
And realize being turned on or off between the power input pin VBUS of charging interface 310 and ground.The power input of charging interface 310
The power pins of pin VBUS connection external recharging apparatus 200 obtain external charging dress by power input pin VBUS
Set 200 charging signals.Wherein, first switching element 360 can be triode, or field-effect tube, or can
Control switch.
Universal input/output pin (General Purpose Input Output, GPIO) of control module 380 connects
First control terminal 363.When the difference of first impedance value and second impedance value is greater than preset difference value threshold value, the control
First input end 361 is connect by molding block 380 by the first control terminal 363 with the first output end 362.
If charging interface 310 is normal, the first impedance value is equal with second impedance value or very close to the difference of the two is very
It is small or be 0.If the difference of the two is larger, being greater than preset difference value threshold value, (preset difference value threshold value can be according to different chargings
Different values, such as 10 ohm, 50 ohm, 100 ohm are arranged in interface 310), then it is assumed that charging interface 310 is abnormal, then by first
The first input end 361 of switch element 360 and the connection of the first output end 362, that is, by the power input pin of charging interface 310
With ground short circuit, to make 200 overcurrent protection of charging equipment 300 or external recharging apparatus, stopping is filled to charging equipment 300
Electricity, protection charging interface 310 will not damage.
For example, charging interface 310 is Type-C interface, since the pin of Type-C interface is more, and Type-C interface
Limited width, therefore the spacing between Type-C interface pin is smaller, feed liquor body or it is dirty when, be easy to cause micro-short circuit, thus
Cause the temperature of Type-C interface to rise, Type-C interface and charging equipment 300 is caused to burn out.When Type-C interface is micro-
When short-circuit, the impedance that will cause Type-C interface changes.It is short to determine whether Type-C interface occurs by impedance variations
Type-C interface is protected to stop charging in road.
Referring to Fig. 9, Fig. 9 is the another structural representation of charging equipment provided by the embodiments of the present application and charging unit
Figure.The control module 380 may include fast charge managing chip 381 and battery management chip 382.When target charge power is first
When charge power, the power input pin VBUS of charging interface 310 is for being directly connected to or being connected by second switch element 371
Battery 330；When target charge power is the second charge power, the power input pin VBUS of charging interface 310 passes through battery
Managing chip 382 connects battery 330.
Wherein, when external recharging apparatus 200 and charging equipment 300 are normal charging mode, i.e., when target charging function
When rate is the second charge power, the power input pin VBUS of charging interface 310 connects battery by battery management chip 382
330.Battery management chip 382 includes protection circuit, can be stopped directly by the power pins VBUS ground short circuit of Type-C interface
It only charges, realizes the temperature decline of type-C interface.The periphery of battery management chip 382 further includes inductance L1, the one end inductance L1
Power management chip 382 is connected, the other end connects battery 330.
When external recharging apparatus 200 and charging equipment 300 are fast charge mode, i.e., when target charge power fills for first
When electrical power, the power input pin VBUS connection external recharging apparatus 200 of charging interface 310 connects or passes through second switch member
Part 371 connects battery 330.The electric energy of external recharging apparatus 200 is directly filled to the battery 330 of charging equipment 300, can be realized big
The fast charge of power.Meanwhile without passing through battery management core between external recharging apparatus 200 and the battery 330 of charging equipment 300
Piece 382, if when such as Type-C interface has foreign matter or feed liquor body to charging interface 310, between the pin of Type-C interface
Will appear short circuit, since under straight mold filling formula, the pin of charging interface 310 is directly electrically connected with battery 330, charging interface 310 with
There is no battery management chip 382 to be protected between battery 330, short circuit, which occurs, for Type-C interface will lead to electric current in a short time
It is excessive and easy to burn Type-C interface and charging equipment 300.If when Type-C interface exception, such as the temperature of Type-C interface
When spending information more than reliability temperature threshold (such as 60 degrees Celsius), Type-C interface and the separated of battery 330 are first exited into fast charge,
Then the power pins VBUS ground short circuit of Type-C interface is stopped into charging again, realizes the temperature decline of Type-C interface, protects
Protect Type-C interface.In this way, can prevent under fast charge mode, the power pins VBUS ground short circuit of Type-C interface is made
At the power pins of battery 330, also ground short circuit to make the voltage VBAT 0 of battery 330 causes charging equipment 300
The problem of system entirety power down.
In some embodiments, second switch element 371 includes the second input terminal 3711, second output terminal 3712 and second
Control terminal 3713.Second input terminal 3711 connects the power input pin VBUS of the charging interface 310, and described second is defeated
Outlet 3712 is used to connect the input terminal of the battery 330, and second input terminal 3711 is led with the second output terminal 3712
Logical, to enter fast charge mode, second control terminal 3713 is for controlling second input terminal 3711 and second output
End 3712 is turned on or off.
The control module 380 connects second control terminal 3713, when first impedance value and second impedance
The difference of value is greater than preset difference value threshold value, and when the charging circuit is in fast charge mode, and the control module 380 first controls the
Two input terminals 3711 and second output terminal 3712 disconnect, to exit fast charge mode, then the first input end 361 and first is defeated
Outlet 362 connects, to make 200 overcurrent protection of charging equipment 300 or external recharging apparatus, stops to charging equipment 300
Charging, protection charging interface 310 will not damage.
In some embodiments, second switch element 371 can be a switching tube.Second switch element 371 can also be with
Including first switch tube 372 and second switch 374, the input terminal of first switch tube 372 is as first input end 3711, and second
For the output end of switching tube 374 as the first output end 3712, the output end of first switch tube 372 is defeated with second switch 374
Enter end connection, the control terminal of first switch tube 372 is connect with the control terminal of second switch 374, and as the first control terminal
3713。
First switch tube 372 and second switch 374 can be field-effect tube or triode.By taking field-effect tube as an example, the
The input terminal of one switching tube 372 is source electrode, and the output end of first switch tube 372 is drain electrode, and the control terminal of first switch tube 372 is
Grid, the input terminal of second switch 374 are drain electrode, and the output end of second switch 374 is source electrode, second switch 374
Control terminal is grid.Two field-effect tube connections can prevent the signal of battery 330 from flowing backward.
In some embodiments, the control module 380 sends cut-offing instruction to described outer by the charging interface 310
Portion's charging unit 200, the cut-offing instruction are defeated to the charging interface 310 for controlling the stopping of external recharging apparatus 200
Enter charging signals.
Control module 380 can also send cut-offing instruction to external recharging apparatus 200, and cut-offing instruction can pass through charging
Mouth 310 is sent to charging unit 200, can also be sent to charging unit 200 by modes such as WIFI, bluetooths.Cut-offing instruction can
To stop inputting charging signals to the charging interface 310 for controlling the external recharging apparatus 200.To make charging unit
200 stop inputting charging signals to the charging interface 310 of charging equipment, improve safety.
Charging interface 310 includes communications pins D+, D-, and there are two communication port for the corresponding tool of control module 380, respectively with its
In the connection of communications pins.Control module 380 is communicated by two communication port with charging unit 200.
Wherein, it is equipped with analog-to-digital conversion (AC-DC) in charging unit 200, for (such as 220V to be exchanged by the alternating current of alternating current
Electricity) it is converted into the direct current (direct current of such as 5V) to charge to charging equipment 300.It can have in battery management chip 382
DC-DC voltage transformation module can need to adjust its output to the voltage and or current of battery 330 according to battery 330.
Charging unit 200 can disconnect the connection between AC-DC module and the power input pin of charging interface 310,
The connection between alternating current and AC-DC module can be disconnected.
In some embodiments, a resistance R1 can be concatenated in charge cable 210 between power supply VBUS line and CC line,
Being used to indicate external recharging apparatus (such as power supply adaptor) is a source device.It can also be in the power supply of external recharging apparatus 200
A resistance R1 is concatenated between VOUT pin and CC pin, being used to indicate external recharging apparatus (such as power supply adaptor) is that a source is set
It is standby.Battery protecting plate can be equipped in the battery 330 of charging equipment 300, short circuit, overcurrent protection may be implemented in battery protecting plate
Etc. functions.
In some embodiments, charging circuit further includes the third switch element 260 and second in charging unit 200
Control module 230.
Third switch element 260 includes third input terminal 261, third output end 262 and third control terminal 263, and third is defeated
Enter end 261 and connects the power input pin VBUS of charging interface 310, third control terminal for connecting power supply, third output end 262
263 are turned on or off between third input terminal 261 and third output end 262 for controlling.
Second control module 230 connects third control terminal 263 and power input pin VBUS, when the second control module 230
When detecting power input pin VBUS ground connection, by the separated of third input terminal 261 and third output end 262.
It include third switch element 260 and the second control module 230, the detection of the second control module 230 in charging unit 200
When to power input pin VBUS ground connection, by the separated of third input terminal 261 and third output end 262, thus make power supply with
The power input pin VBUS of charging interface 310 is disconnected, and protects charging equipment 300 and charging unit 200.Third switch element
260 can be field-effect tube, triode and controllable switch etc..Wherein, the third input terminal 261 of third switch element 260 can be with
Connect the output end of AC-DC module.
Referring to Fig. 10, Figure 10 is the flow diagram of charging method provided by the embodiments of the present application.Incorporated by reference to Fig. 5
To Fig. 9, which is applied to charging equipment 300, and charging equipment 300 includes charging interface 310, charging
Mouth 310 is for connecting charging unit 200.The charging method can specifically include:
101, obtain the connection status of the charging interface.
Wherein, charging equipment 300 can be able to be for the charging equipment 300 in above-described embodiment, charging unit 200
Charging unit 200 in above-described embodiment, details are not described herein.Charging interface 310 is for connecting external recharging apparatus 200.It fills
Electrical interface 310 can be universal serial bus (Universal Serial Bus, USB) interface.Specifically, charging interface 310
It can be Micro USB interface or Type-C interface etc., certainly, charging interface 310 or other interfaces.Charging interface
310 connect external recharging apparatus 200 by charging cable line, and obtain electric energy from external recharging apparatus 200.External recharging apparatus
200 can be the devices such as adapter.
Connection status includes connected status and not-connected status, and connected status indicates that charging interface 310 is filled with outside
Electric installation 200 connects, and not-connected status then indicates that charging interface 310 is not connect with charging unit 200.
Specifically, can be detected by an idle pin of charging interface 310 or special test pin.For example, filling
Electrical interface 310 is Type-C interface, is detected by an idle pin in Type-C interface, Type-C interface, which does not pass through, to be filled
When electric wire connects adapter, which is low level, and after Type-C interface connects adapter by charging cable, adapter is given
The idle pin improves a high level.In this way, the company of charging interface 310 can be detected by judging the level of idle pin
Connect state.Idle pin is low level, then is not-connected status, and idle pin is high level, then is connected status.
102, when the connection status is not-connected status, obtain the first impedance value of the charging interface.
First impedance value is impedance value when charging interface 310 is not connected with charging unit 200.
103, when the connection status is connected status, obtain the second impedance value of the charging interface.
Second impedance value is impedance value when charging interface 310 connects charging unit 200.
104, when the difference of first impedance value and second impedance value is greater than preset difference value threshold value, stop passing through
The charging interface charges.
After obtaining the first impedance value and the second impedance value, the difference of the first impedance value and the second impedance value is sought, when described
When the difference of one impedance value and second impedance value is less than preset difference value threshold value, says that charging interface 310 is normal, can pass through
Charging interface 310 charges.When the difference of first impedance value and second impedance value is greater than preset difference value threshold value,
Charging interface 310 may have foreign matter or feed liquor body, lead to micro-short circuit in charging interface 310, at this point, stopping passing through the charging
Interface 310 charges, and protects charging interface 310.
In some embodiments, charging method further include: obtain the first temperature information of the charging interface；Root
Corresponding preset difference value threshold value is obtained from mapping table according to first temperature information.
The first temperature information of charging interface 310 can be obtained in real time.Charging interface 310 during the charging process can temperature liter
It is high.The reason of temperature increases may be that charging interface 310 fever itself causes temperature to increase, it is also possible to battery or charging circuit
Temperature increases, and influences the raising of 310 temperature of charging interface.After 310 temperature of charging interface increases, the impedance of charging interface 310 also can
Change therewith and the resistance value of detection resistance can also change.What a mapping table can be preset, by different temperatures pair
The preset difference value threshold value answered is stored up in mapping table, then according to the first temperature information of current charging interface 310, from mapping table
Corresponding preset difference value threshold value is inside obtained, 310 resistance difference of bring charging interface is changed with compensation temperature.Because of temperature change
The first impedance value and the difference of the second impedance value is brought to become larger, corresponding adjustment (as increased) preset difference value threshold value, makes it more at this time
Rationally, it prevents from judging by accident.
In some other embodiment, the resistance value of the corresponding detection resistance of different temperatures can also be stored in mapping table
It is interior, then according to the first temperature information of current charging interface 310, the resistance of corresponding detection resistance is obtained out of mapping table
Value, then in conjunction with R=R0* (V1/ (V0-V1)) formula, obtains corresponding first impedance value and the second impedance value.
In some embodiments, corresponding preset difference value threshold value is obtained from mapping table according to first temperature information
Step can specifically include:
When first temperature information is less than reliability temperature threshold, according to first temperature information from mapping table
To corresponding preset difference value threshold value；
When first temperature information is greater than reliability temperature threshold, stopping is charged by the charging interface.
It, can be according to charging when charging equipment is charged by charging interface 310 and external recharging apparatus 200
Mouthfuls 310 temperature judges whether charging interface 310 has micro-short circuit, when charging interface 310 because having foreign matter or feed liquor body,
It will cause micro-short circuit, so that the temperature at charging interface 310 be made to rise.Temperature at charging interface 310 is more than safe temperature
When threshold value, stop charging by the charging interface 310.
Specifically, can control first input end 361 and the conducting of the first output end 362 of first switching element 360, thus
The power input pin VBUS of charging interface 310 is grounded, i.e., is grounded the power pins VBUS of charging interface 310, to make
The power pins of external recharging apparatus 200 are grounded, to make 200 overcurrent protection of charging equipment 300 or external recharging apparatus, are stopped
It only charges to charging equipment 300, protection charging interface 310 will not damage.
In some embodiments, which can also include: default beyond first when first impedance value
When impedance ranges, stopping is charged by the charging interface.
The first default impedance ranges of setting can be extracted, then directly by judging the first impedance at charging interface 310
Whether value in the first default impedance ranges judges whether charging interface 310 is abnormal.For example, the first default impedance ranges can be with
For 80k Ω -120k Ω, or 90k Ω -110k Ω then recognizes when the first impedance value, it exceeds the first default impedance ranges
It is abnormal for charging interface 310, such as into foreign matter or feed liquor body.
In some embodiments, which can also include: default beyond second when second impedance value
When impedance ranges, stopping is charged by the charging interface.
The second default impedance ranges of setting can be extracted, then directly by judging that the second impedance value at charging interface is
It is no to judge whether charging interface 310 is abnormal in the second default impedance ranges.For example, the second default impedance ranges can be
80k Ω -120k Ω, or 90k Ω -110k Ω, when the second impedance value, it exceeds the second default impedance ranges, then it is assumed that
Charging interface 310 is abnormal, such as into foreign matter or feed liquor body.
Wherein, the first default impedance ranges and the second default impedance ranges may be the same or different.Such as the second impedance
Value is corresponding to change the second default impedance ranges because charging interface 310 changes in charging process.
It should be noted that the numberical range of the first default impedance ranges and the second default impedance ranges is only in the present embodiment
For example, in some other embodiment, the numberical range of the first default impedance ranges and the second default impedance ranges can root
It is adjusted according to needs.
In some embodiments, the step of stopping is charged by the charging interface can specifically include: hair
Send cut-offing instruction to the external recharging apparatus, the cut-offing instruction stops filling to described for controlling the external recharging apparatus
Electrical interface inputs charging signals.
Cut-offing instruction can be sent to external recharging apparatus 200, cut-offing instruction can be sent to by charging interface 310 to be filled
Electric installation 200 can also be sent to charging unit 200 by modes such as WIFI, bluetooths.Cut-offing instruction can be used for controlling described
External recharging apparatus 200 stops inputting charging signals to the charging interface 310.To make charging unit 200 stop to wait fill
The charging interface 310 of electric equipment inputs charging signals, improves safety.
Wherein, AC-DC module is equipped in charging unit 200, for converting the alternating current (such as 220V alternating current) of alternating current
At the direct current (direct current of such as 5V) to charge to charging equipment 300.Cut-offing instruction, which can control charging unit 200, to break
Open the connection between AC-DC module and the power input pin of charging interface 310, can also disconnect alternating current and AC-DC module it
Between connection.
Figure 11 is please referred to, Figure 11 is the module frame chart schematic diagram of electronic equipment provided by the embodiments of the present application.The electronics is set
Standby 100 can be the charging equipment in above-described embodiment, which may include control circuit, the control circuit
It may include storage and processing circuit 61.The storage and processing circuit 61 may include memory, volatile memory etc., storage
It can be used for the operating of controlling electronic devices 100 with the processing circuit in processing circuit 61.Storage and processing circuit 61 can be used for
Run the software in electronic equipment 100.
Electronic equipment 100 can also include input-output circuit 62.Input-output circuit 62 can be used for making electronic equipment
100 realization data are output and input, i.e. permission electronic equipment 100 allows electronic equipment from outer equipment receiving data and also
100 export data to external equipment from electronic equipment 100.Input-output circuit 62 may further include sensor 63, with
And one or more displays (such as display 64).
Electronic equipment 100 can also include audio component 65 and telecommunication circuit 66.Audio component 65 can be used for for electricity
Sub- equipment 100 provides audio input and output function, and telecommunication circuit 66 can be used for providing for electronic equipment 100 and external equipment
The ability of communication.
Electronic equipment 100 can further include other input-output units 67.Input-output unit 67 can wrap
Button is included, control stick, click wheel, scroll wheel, touch tablet, keypad, keyboard, camera, light emitting diode and other states refer to
Show device etc..
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, reference can be made to the related descriptions of other embodiments.
The embodiment of the present application also provides a kind of storage medium, which is stored with computer program, when the computer
When program is run on computers, so that the computer executes the charging method in any of the above-described embodiment, such as: it obtains
The connection status of the charging interface；When the connection status is not-connected status, the first resistance of the charging interface is obtained
Anti- value；When the connection status is connected status, the second impedance value of the charging interface is obtained；When first impedance
When value and the difference of second impedance value are greater than preset difference value threshold value, stopping is charged by the charging interface.
In the embodiment of the present application, storage medium can be magnetic disk, CD, read-only memory (Read Only Memory,
) or random access memory (Random Access Memory, RAM) etc. ROM.
It should be noted that for the charging method of the embodiment of the present application, this field common test personnel can be with
Understand all or part of the process for realizing the charging method of the embodiment of the present application, is that can be controlled by computer program
Relevant hardware is completed, and the computer program can be stored in a computer-readable storage medium, be such as stored in electronics
It in the memory of equipment, and is executed by least one processor in the electronic equipment, in the process of implementation may include such as charging
The process of the embodiment of processing method.Wherein, the storage medium can be magnetic disk, CD, read-only memory, arbitrary access note
Recall body etc..
It is situated between above to a kind of charging circuit, charging method provided by the embodiment of the present application, electronic equipment and storage
Matter is described in detail, and specific examples are used herein to illustrate the principle and implementation manner of the present application, above
The explanation of embodiment is merely used to help understand the present processes and its core concept；Meanwhile for those skilled in the art
Member, according to the thought of the application, there will be changes in the specific implementation manner and application range, in conclusion this explanation
Book content should not be construed as the limitation to the application.
Claims (12)
1. a kind of charging circuit characterized by comprising
Charging interface, the charging interface is for connecting external recharging apparatus；
Detection module, the detection module are connect with the charging interface, and the detection module is for detecting the charging interface
Connection status；
Impedance obtains module, and the impedance obtains module and connect with the detection module, when the connection status of the charging interface
When for not-connected status, the impedance obtains the first impedance value that module obtains the charging interface, when the charging interface
When connection status is connected status, the impedance obtains the second impedance value that module obtains the charging interface；
Control module, the control module and the impedance obtain module and connect, and obtain first impedance value and described the
Two impedance values, when the difference of first impedance value and second impedance value is greater than preset difference value threshold value, stopping passes through institute
Charging interface is stated to charge.
2. charging circuit according to claim 1, which is characterized in that the charging circuit further includes temperature detecting element,
The temperature detecting element is used to obtain the first temperature information of the charging interface；
The control module connect with the temperature detecting element and obtains first temperature information, and obtains first temperature
Information is spent, the control module obtains corresponding preset difference value threshold value according to first temperature information from mapping table.
3. charging circuit according to claim 1, which is characterized in that the charging circuit further includes first switching element；
The first switching element includes first input end, the first output end and the first control terminal, the first input end and institute
State the power input pin connection of charging interface, first output end ground connection, first control terminal is for controlling described the
One input terminal and first output end are turned on or off；
When the difference of first impedance value and second impedance value is greater than preset difference value threshold value, the control module is by institute
First input end is stated to connect with the first output end.
4. charging circuit according to claim 3, which is characterized in that the charging circuit further includes second switch element,
The second switch element includes the second input terminal, second output terminal and the second control terminal, described in second input terminal connection
The power input pin of charging interface, the second output terminal are used to connect the input terminal of the battery, second input terminal
It is connected with the second output terminal, to enter fast charge mode, second control terminal is for controlling second input terminal and institute
State being turned on or off for second output terminal；
The control module connects second control terminal, when the difference of first impedance value and second impedance value is greater than
Preset difference value threshold value, the and when charging circuit is in fast charge mode, the control module first control second input terminal and
The second output terminal disconnects, and to exit fast charge mode, then the control module is by the first input end and the first output end
Connection.
5. charging circuit according to claim 1, which is characterized in that the control module is sent by the charging interface
Cut-offing instruction to the external recharging apparatus, the cut-offing instruction stops for controlling the external recharging apparatus to the charging
Interface inputs charging signals.
6. a kind of charging method is applied to device to be charged, which is characterized in that the device to be charged includes charging
Mouthful, the charging interface is for connecting external recharging apparatus；The described method includes:
Obtain the connection status of the charging interface；
When the connection status is not-connected status, the first impedance value of the charging interface is obtained；
When the connection status is connected status, the second impedance value of the charging interface is obtained；
When the difference of first impedance value and second impedance value is greater than preset difference value threshold value, stopping passes through the charging
Interface charges.
7. charging method according to claim 6, which is characterized in that the method also includes:
Obtain the first temperature information of the charging interface；
Corresponding preset difference value threshold value is obtained from mapping table according to first temperature information.
8. charging method according to claim 7, which is characterized in that according to first temperature information from mapping table
In the step of obtaining corresponding preset difference value threshold value, comprising:
When first temperature information is less than reliability temperature threshold, obtained from mapping table pair according to first temperature information
The preset difference value threshold value answered；
When first temperature information is greater than reliability temperature threshold, stopping is charged by the charging interface.
9. charging method according to claim 6, which is characterized in that the method also includes:
When first impedance value exceeds the first default impedance ranges, stopping is charged by the charging interface；
Or
When second impedance value exceeds the second default impedance ranges, stopping is charged by the charging interface.
10. charging method according to claim 6, which is characterized in that it is described stop by the charging interface into
The step of row charging, comprising:
Cut-offing instruction is sent to the external recharging apparatus, the cut-offing instruction for control the external recharging apparatus stop to
The charging interface inputs charging signals.
11. a kind of electronic equipment, which is characterized in that the electronic equipment includes charging circuit and battery, the charging circuit with
The battery connection, the charging circuit charging circuit as described in any one in claim 1-5.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that described program is processed
The step of charging management methods as described in any item such as claim 6 to 10 are realized when device executes.
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| CN201811348651.4A CN109245244B (en) | 2018-11-13 | 2018-11-13 | Charging circuit, charging processing method, electronic device, and storage medium |
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| CN201811348651.4A CN109245244B (en) | 2018-11-13 | 2018-11-13 | Charging circuit, charging processing method, electronic device, and storage medium |
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