CN106532835B - Charging unit and charger - Google Patents
Charging unit and charger Download PDFInfo
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- CN106532835B CN106532835B CN201611100309.3A CN201611100309A CN106532835B CN 106532835 B CN106532835 B CN 106532835B CN 201611100309 A CN201611100309 A CN 201611100309A CN 106532835 B CN106532835 B CN 106532835B
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- 238000001514 detection method Methods 0.000 claims abstract description 27
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- 239000003990 capacitor Substances 0.000 claims description 52
- 230000005611 electricity Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000000087 stabilizing effect Effects 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 230000005678 Seebeck effect Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
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- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000896 Manganin Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H02J7/0088—
-
- 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
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of charging unit and chargers, are applied to charger, belong to electronic technology field.Wherein, the charging unit includes judgment module, detection module, power-off modular, alarm module, control module；The temperature of the charger is detected by detection module, and a voltage signal will be exported to judgment module, judgment module judges whether the temperature of charger is higher than preset temperature according to this voltage signal, and it exports one and judges signal to power-off modular, so that power-off modular can judge whether signal cuts off the external power supply of the charger according to this；And when charger is as storage equipment, wireless telecom equipment, display equipment, it can also be automatically powered off by power-off modular, allow the charger when the temperature is excessively high, so that charger be prevented to be burned when the temperature is excessively high, substantially increases the safety of charger.
Description
Technical field
The present invention relates to electronic technology fields, in particular to a kind of charging unit and charger.
Background technique
With the development of science and technology, charger is widely used in every field, is especially used extensively in sphere of life
In the common electric appliance of mobile phone, camera etc..Charger is to use power electronics semiconductor device, and voltage and frequency is changeless
Convert alternating current is a kind of static ac dc converter device of direct current.Electric field is being used using battery as working power or backup power source
It closes, charger is with a wide range of applications.
Many commonly-used compact electric apparatus can realize the supply of power supply by way of charging, but occur one simultaneously
A new security risk, i.e., existing charger form, can make prompt, but fill at this time in the case where electrical appliance is fully charged
Electric appliance is still working, if user can not break charge power supply in time, thus easilys lead to charger and crosses cause thermal damage,
Spontaneous combustion, self-destruction are even resulted in, repeatedly, bringing greatly to the safety of life and property of people had occurred in this safety accident
Hidden danger.
Therefore, the safety that charger how is improved by effectively controlling is that current urgent need considers the problems of.
Summary of the invention
The purpose of the present invention is to provide a kind of charging unit and chargers, can effectively improve the safety of charger
Property.
The embodiment of the present invention is achieved in that
In a first aspect, the embodiment of the present invention provides a kind of charging unit, it is applied to charger, the charging unit includes sentencing
Disconnected module, detection module, power-off modular, alarm module, control module, the control module respectively with the detection module, institute
Judgment module, the power-off modular, alarm module coupling are stated, the judgment module is coupled with the detection module, described
Judgment module is coupled with the power-off modular, the alarm module respectively, and the outside of the power-off modular and the charger is defeated
Enter power supply coupling；The detection module is used to detect the temperature signal of the charger, and exports a voltage signal；The judgement
Module is used to judge according to the voltage signal whether the temperature of the charger to be higher than preset temperature value, one judgement letter of output
Number；The power-off modular is used for according to the external power supply for judging signal and whether cutting off the charger.
Further, the power-off modular includes the first input circuit, the first NAND gate circuit, the second input circuit, the
Two NAND gate circuits, first input circuit are coupled with first NAND gate circuit, first NAND gate circuit and institute
The coupling of the second NAND gate circuit is stated, second input circuit is coupled with second NAND gate circuit.
Further, the first input circuit includes first port, first resistor, second resistance, first capacitor, the second electricity
Appearance, third capacitor, the first comparison amplifier and three terminal regulator；One end coupling of the first port and the first resistor
It closes, the other end of the first resistor is coupled with the external input power of the charger, one end of the first resistor and institute
State one end coupling of first capacitor, the other end ground connection of the first capacitor, the normal phase input end of first comparison amplifier
It is coupled with the first port, the inverting input terminal of first comparison amplifier is coupled with one end of the second resistance, institute
The other end for stating second resistance is coupled with the external input power of the charger, the anti-phase input of first comparison amplifier
End is coupled with one end of the cathode terminal of the three terminal regulator, second capacitor respectively, the anode tap of the three terminal regulator,
The other end of second capacitor is grounded, one end of the power positive end of first comparison amplifier and the third capacitor
Coupling, the other end ground connection of the third capacitor, the output end of first comparison amplifier and first NAND gate circuit
Coupling.
Further, first NAND gate circuit include 3rd resistor, the 4th resistance, the 5th resistance, the 4th capacitor with
And first NAND gate；One end of the 3rd resistor, one end of the 4th resistance, the 5th resistance one end with it is described
The output end of first comparison amplifier couples, the external input power coupling of the other end of the 3rd resistor and the charger
It closes, the other end of the 4th resistance is equipped with the first connectivity port, the other end of the 5th resistance and first NAND gate
Input terminal coupling, the feeder ear of first NAND gate outside with one end of the 4th capacitor, the charger respectively
Input power coupling, the other end ground connection of the 4th capacitor, the control terminal of first NAND gate are equipped with second connection end mouth,
The ground terminal of first NAND gate is grounded, and the output end of first NAND gate is coupled with second NAND gate circuit.
Further, second input circuit includes second port, the 6th resistance, the 7th resistance, the 8th resistance, the 9th
Resistance, diode, the 5th capacitor and triode；The second port is coupled with one end of the 5th capacitor, and the described 5th
The other end of capacitor is coupled with one end of the 6th resistance, the other end of the 6th resistance and the base stage coupling of the triode
It closes, the base stage of the triode is also coupled with the cathode of one end of the 7th resistance, the diode respectively, the 7th electricity
The other end of resistance is coupled and is grounded with the emitter of the triode with the anode of the diode, the current collection of the triode
Pole is coupled with one end of one end of the 8th resistance, the 9th resistance respectively, the other end of the 8th resistance with it is described
The external power supply of charger couples, and the other end of the 9th resistance is coupled with second NAND gate circuit.
Further, second NAND gate circuit include the 6th capacitor and the second NAND gate, the 9th resistance it is another
One end is coupled with the input terminal of second NAND gate, the control of the output end of first NAND gate and second NAND gate
End coupling, the feeder ear of second NAND gate are defeated with one end of the 6th capacitor, the external power supply of the charger respectively
Enter end coupling, the other end ground connection of the 6th capacitor, the ground terminal of second NAND gate is grounded, second NAND gate
Output end is equipped with third connectivity port.
Further, detection module includes thermocouple, compensation circuit, amplifying circuit, and the thermocouple and the compensation are electric
Road coupling, the compensation circuit are coupled with the amplifying circuit, and the amplifying circuit is coupled with the judgment module.
Further, the compensation circuit includes the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the
One end of 14 resistance and battery, the tenth resistance is coupled with one end of the eleventh resistor, the tenth resistance
One end is coupled with the tie point of one end of the eleventh resistor with the cold end of the thermocouple, the other end of the tenth resistance
It is coupled respectively with one end of the positive terminal of the battery, the twelfth resistor, the negative pole end of the battery and the described 14th
One end of resistance couples, the other end of the 14th resistance respectively with the other end of the eleventh resistor, thirteenth resistor
One end coupling, the other end of the twelfth resistor couples with the other end of the thirteenth resistor, the twelfth resistor
The other end coupled with the tie point of the other end of the thirteenth resistor with the amplifying circuit.
Further, the amplifying circuit includes the first operational amplifier, second operational amplifier, third operation amplifier
Device, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 19th resistance, the 20th resistance, the 21st
The non-inverting input terminal of resistance, first operational amplifier is coupled with the measurement end of the thermocouple, first operation amplifier
The output end of device is coupled with one end of one end of the 15th resistance, the 16th resistance respectively, the 15th resistance
The other end coupled with one end of the 17th resistance, the one of the other end of the 15th resistance and the 17th resistance
The tie point at end is coupled with the inverting input terminal of first operational amplifier, the other end of the 17th resistance and described the
One end of 18 resistance couples, the tie point of the other end of the 17th resistance and one end of the 18th resistance with it is described
The inverting input terminal of second operational amplifier couples, the other end of the 18th resistance and one end coupling of the 19th resistance
It closes, the tie point and the second operational amplifier of one end of the other end and the 19th resistance of the 18th resistance
Normal phase input end coupling, the other end of the 19th resistance are coupled with one end of the 20th resistance, the 20th electricity
The other end of resistance is grounded, the tie point of one end of the other end and the 20th resistance of the 19th resistance and the third
The normal phase input end of operational amplifier couples, the other end of the 16th resistance and one end coupling of the 21st resistance
It closes, the tie point and the third operational amplifier of one end of the other end of the 16th resistance and the 21st resistance are just
The coupling of phase input terminal, the other end of the 21st resistance are coupled with the third operational amplifier output terminal.
Second aspect, the embodiment of the present invention provide a kind of charger, and the charger includes charging interface, for outside connecting
The plug and charging unit of portion's power supply, the charging interface, the plug are coupled with the charging unit.
The beneficial effect of the embodiment of the present invention is:
The embodiment of the present invention provides a kind of charging unit and charger, when charger external power supply by charger to quilt
When charging equipment charges, the temperature of the charger is detected by the detection module, and using the temperature signal as an electricity
Pressure signal is exported to judgment module, and judgment module judges whether the temperature of charger is higher than default temperature according to this voltage signal
Degree, and export one and judge signal to power-off modular, so that power-off modular can judge whether signal cuts off the charging according to this
The external power supply of device；For example, power-off modular is for cutting off institute when this judges that signal is higher than preset temperature for the temperature of charger
State the external power supply of charger；When this judges signal for the temperature of charger not higher than preset temperature, power-off modular is not used in
Cut off the external power supply of the charger；Allow charger when the temperature is excessively high, is automatically powered off by power-off modular, thus
It can guarantee that charger is preventing from being burned when the temperature is excessively high, substantially increase the safety of charger.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is a kind of structural block diagram of charging unit provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of power-off modular provided in an embodiment of the present invention；
Fig. 3 is a kind of circuit diagram of detection module provided in an embodiment of the present invention；
Fig. 4 is a kind of structural block diagram of charger provided in an embodiment of the present invention.
Icon: 200- charger；210- charging interface；220- plug；100- charging unit；110- power-off modular；112-
First input circuit；The first NAND gate circuit of 114-；The second input circuit of 116-；The second NAND gate circuit of 118-；120- detection
Module；122- compensation circuit；124- amplifying circuit；130- judgment module；140- alarm module；150- control module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply
Relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " coupling ",
" connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
In concrete meaning.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that being understood by implementing the embodiment of the present invention.The objectives and other advantages of the invention can be by written
Specifically noted structure is achieved and obtained in specification, claims and attached drawing.
Fig. 1 is please referred to, Fig. 1 is a kind of structural block diagram of charging unit 100 provided in an embodiment of the present invention, the charging dress
Setting 100 includes judgment module 130, detection module 120, power-off modular 110, alarm module 140, control module 150, the control
Module 150 is coupled with the detection module 120, judgment module 130, power-off modular 110, the alarm module 140 respectively, described
Judgment module 130 is coupled with the detection module 120, the judgment module 130 respectively with the power-off modular 110, the police
Show that module 140 couples, the power-off modular 110 is coupled with the external input power of the charger.
Referring to figure 2., Fig. 2 is a kind of circuit diagram of power-off modular 110 provided in an embodiment of the present invention.The power-off modular
110 include the first input circuit 112, the first NAND gate circuit 114, the second input circuit 116, the second NAND gate circuit 118, institute
It states the first input circuit 112 to couple with first NAND gate circuit 114, first NAND gate circuit 114 and described second
NAND gate circuit 118 couples, and second input circuit 116 is coupled with second NAND gate circuit 118.
First input circuit 112 be used for obtain judgment module 130 transmission judgement signal, and will judge signal amplify after
It exports to the first NAND gate circuit 114.First input circuit 112 include first port P1, first resistor R1, second resistance R2,
First capacitor C1, the second capacitor C2, third capacitor C3, the first comparison amplifier U1 and three terminal regulator U2.
First port P1 can receive judgement signal.First port P1 is coupled with one end of first resistor R1, first resistor
The other end of R1 is coupled with the external input power of the charger.One end of first capacitor C1 and one end coupling of first resistor R1
It closes, and the other end of first capacitor C1 is grounded to form filtering and pressure stabilizing.The positive input and first of first comparison amplifier U1
Port P1 is coupled to obtain electric signal to be detected.The reverse input end of first comparison amplifier U1 and one end coupling of second resistance R2
It closes, the other end of second resistance R2 is coupled with the external input power of the charger.First comparison amplifier U1's is reversed defeated
Enter end to couple with the cathode terminal of three terminal regulator U2 and reference voltage end respectively, and the anode tap of three terminal regulator U2 is grounded.Make
For a kind of embodiment, by the partial pressure of second resistance R2, and by the pressure stabilizing of three terminal regulator U2 so that first compares and put
The reverse input end of big device U1 can obtain the operating voltage of adaptation.The reverse input end of first comparison amplifier U1 is also with second
One end of capacitor C2 couples, and the other end of the second capacitor C2 is grounded to form filtering and pressure stabilizing.First comparison amplifier U1 is positive
Power supply end is coupled with external power supply, and the positive power supply end of the first comparison amplifier U1 also with third capacitor C3 one
End coupling, the other end of third capacitor C3 are grounded to form filtering and pressure stabilizing.The reverse power supply power end of first comparison amplifier U1
Ground connection, and the output end of the first comparison amplifier U1 is coupled with the first NAND gate U3 circuit.Pass through the first comparison amplifier U1's
Coupled modes, the electric signal to be detected that just can input first port P1 are compared and enlarged, and will be amplified to be detected
Electric signal output.
First NAND gate circuit 114 include 3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 4th capacitor C4 and
First NAND gate U3.
One end of the 3rd resistor R3, one end of the 4th resistance R4, the 5th resistance R5 one end and institute
State the output end coupling of the first comparison amplifier U1, the other end of the 3rd resistor R3 and the external input of the charger
Power supply coupling, the other end of the 4th resistance R4 are equipped with the first connectivity port a, the control module 150 can obtain this first
The judgement signal of connectivity port a；First port P1 is coupled with control module 150；The other end of the 5th resistance R5 and institute
State the first NAND gate U3 input terminal coupling, the feeder ear of the first NAND gate U3 respectively with the 4th capacitor C4 one
The external input power coupling at end, the charger, so that the first NAND gate U3 can obtain the electric signal to be detected of input.Institute
The other end for stating the 4th capacitor C4 is grounded to form filtering and pressure stabilizing, and the control terminal of the first NAND gate U3 is equipped with second connection end
Mouthful b, second connection end mouth b also couples with the control module 150, and second connection end mouth b is used to obtain the control module
The control signal of 150 inputs, the input of the control terminal as the first NAND gate U3, the ground connection termination of the first NAND gate U3
The output end on ground, the first NAND gate U3 is coupled with second NAND gate circuit 118, and then 118 energy of the second not circuit
Enough obtain the pulse signal of the first NAND gate circuit 114 output.
Second input circuit 116 is used to obtain the electric signal to be detected of the external power supply input charger of charger, including
Second port P2, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, diode D1, the 5th capacitor C5 with
And triode Q1.
Second port P2 can obtain the electric signal to be detected of the external power supply input charger of charger.The second end
Mouth P2 is coupled with one end of the 5th capacitor C5, the other end of the 5th capacitor C5 and one end coupling of the 6th resistance R6
Close, the other end of the 6th resistance R6 couples with the base stage of the triode Q1, the base stage of the triode also respectively with institute
State one end of the 7th resistance R7, the cathode coupling of the diode D1, the other end and the diode of the 7th resistance R7
The anode of D1 is coupled and is grounded with the emitter of the triode Q1, so that diode D1 forms clamped effect to circuit.Institute
The collector for stating triode Q1 is coupled with one end of one end of the 8th resistance R8, the 9th resistance R9 respectively, and described
The other end of eight resistance R8 is coupled with the external power supply of the charger, so that the first triode Q1's can obtain work electricity
Source.The other end of the 9th resistance R9 is coupled with second NAND gate circuit 118, so that just can be will acquire is to be detected
Electric signal is output to the second NAND gate circuit 118.
Second NAND gate circuit 118 includes the 6th capacitor C6 and the second NAND gate U4, the other end of the 9th resistance R9
It is coupled with the input terminal of the second NAND gate U4, the control of the output end of the first NAND gate U3 and the second NAND gate U4
End processed coupling, the feeder ear of the second NAND gate U4 outside with one end of the 6th capacitor C6, the charger respectively
Power input coupling, the other end of the 6th capacitor C6 are grounded to form filtering and pressure stabilizing, and the second NAND gate U4's connects
Ground terminal ground connection, the output end of the second NAND gate U4 are equipped with third connectivity port c, which fills for connecting
The load circuit for needing to power in electric appliance.As an implementation, under original state, the control terminal of the second NAND gate U4 is low
Level, so that the second NAND gate U4 under original state exports high level.
When the input terminal of the first NAND gate U3 is when judging signal for high level, then the control of control module 150 first with it is non-
The control terminal input low level of door U3, then the output end of the first NAND gate U3 is just high level, as the second NAND gate U4's
The input of control terminal, when the electric signal to be detected that the input terminal of the second NAND gate U4 inputs is high level, i.e. the temperature of charger
Degree is higher than preset temperature, then the output end of the second NAND gate U4 is low level, to cut off the external power supply of charger；When first
When judging signal for low level of the input terminal of NAND gate U3, then the control terminal of first NAND gate U3 of the control of control module 150 is defeated
Enter low level or high level, then the output end of the first NAND gate U3 is just high level, the control terminal as the second NAND gate U4
Input, when the second NAND gate U4 input terminal input when judging signal for low level, i.e. the temperature of charger is less than or waits
In preset temperature, then the output end of the second NAND gate U4 is high level, to not cut off the external power supply of charger.
Referring to figure 3., Fig. 3 is a kind of circuit diagram of detection module 120 provided in an embodiment of the present invention, the detection module
120 for detecting the temperature signal of the charger, and exports a voltage signal to judgment module 130, the detection module 120 packet
Thermocouple V1, compensation circuit 122, amplifying circuit 124 are included, the thermocouple V1 is coupled with the compensation circuit 122, the compensation
Circuit 122 is coupled with the amplifying circuit 124, and the amplifying circuit 124 is coupled with the judgment module 130.
Thermocouple V1 is common temperature element in a kind of temperature measuring instrument, it can be used directly to measurement temperature, and
Temperature signal is converted into electromotive force signal, by being tested charger in electric meter (secondary meter) conversion cost embodiment
Temperature.The basic principle of thermocouple V1 thermometric is the material conductor composition closed circuit of two kinds of different components, when both ends have temperature
When spending gradient, electric current is just had in circuit and is passed through, there is electromotive force between both ends at this time --- thermo-electromotive force, here it is so-called
Seebeck effect (Seebeck effect).The homogeneous conductor of two kinds of different components is thermode, and the higher one end of temperature is
Working end, the lower one end of temperature are free end, and free end is generally under some stationary temperature.According to thermo-electromotive force and temperature
The functional relation of degree, is made thermocouple indexing table；Phasing meter be free end temperature at 0 DEG C under conditions of obtain, it is different
Thermocouple has different phasing meters.
When accessing the third metal material in Thermocouple Circuit, as long as the temperature of two contacts of material is identical, thermoelectricity
Thermoelectrical potential caused by idol will remain unchanged, i.e., do not influenced by the third metal access circuit.Therefore, in thermocouple temperature measurement
When, it can access measuring instrumentss, after measuring thermo-electromotive force, that is, may know that the temperature for being tested charger in the present embodiment.
The detection module 120 of the charging unit 100 is constituted using thermocouple V1 temperature measurement circuit in the present embodiment, be because
Include that temperature-measuring range is wide, and performance is more stable for thermocouple V1；It measures precision height, can directly contact with tested charger,
It is not influenced by intermediate medium；Thermal response time is fast, flexible to temperature change repercussion；It is big to measure range, can from -40~+
1600 DEG C can continuous temperature measurement；Thermocouple V1 robust performance, mechanical strength are good；The advantages that long service life, device is convenient.Certainly
Temperature sensor etc. can also be used, and other measure the temperature measurement of devices progress charger of temperature.
Thermocouple V1 requires its cold end when measuring temperature, and (measurement end is hot end, the end being connect by lead with measuring circuit
Referred to as cold end) temperature remain unchanged, thermoelectrical potential size is just in certain proportionate relationship with measurement temperature.If cold when measurement
(environment) temperature change at end, will seriously affect the accuracy of measurement.It is influenced as caused by cold junction temperature variation, so often
Certain measure is taken to compensate in cold end, commonly a kind of compensation way is bridge-type auto compensatng circuit 122, and this compensation method is
The arm for constituting bridge circuit is being put close to thermocouple V1 cold end place, this arm is that have the biggish metal group of temperature-coefficient of electrical resistance
At generally using ambrose alloy, excess-three arm is all made of the lesser manganin of temperature-coefficient of electrical resistance.
The compensation circuit 122 includes the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor
R13, the 14th resistance R14 and battery BT.One end of the tenth resistance R10 and one end coupling of the eleventh resistor R11
It closes, the tie point of one end of one end and eleventh resistor R11 of the tenth resistance R10 and the cold end of the thermocouple V1
Coupling, the other end of the tenth resistance R10 one end with the positive terminal of the battery BT, the twelfth resistor R12 respectively
Coupling, the negative pole end of the battery BT are coupled with one end of the 14th resistance R14, and the 14th resistance R14's is another
End is coupled with one end of the other end of the eleventh resistor R11, thirteenth resistor R13 respectively, the twelfth resistor R12's
The other end is coupled with the other end of the thirteenth resistor R13, the other end of the twelfth resistor R12 and the 13rd electricity
The tie point for hindering the other end of R13 is coupled with the amplifying circuit 124.
Wherein, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13 are the resistance not varied with temperature, the
Ten resistance R10 are the resistance of temperature change, and the 14th resistance R14 is the adjustable resistance of regulating cell BT.
What thermocouple V1 was exported is the voltage of millivolt level, it is desirable that is volt-ampere grade, so being put using difference amplifier to design
Big circuit 124, it has very low output impedance, precision and stable gain.
The amplifying circuit 124 includes the first operational amplifier U5, second operational amplifier U6, third operational amplifier
U7, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19, second
Ten resistance R20, the 21st resistance R21, the non-inverting input terminal of the first operational amplifier U5 and the survey of the thermocouple V1
Measure end coupling, the output end of the first operational amplifier U5 respectively with one end of the 15th resistance R15, the described 16th
One end of resistance R16 couples, and the other end of the 15th resistance R15 is coupled with one end of the 17th resistance R17, described
The tie point and the first operational amplifier U5 of one end of the other end of the 15th resistance R15 and the 17th resistance R17
Inverting input terminal coupling, the other end of the 17th resistance R17 is coupled with one end of the 18th resistance R18, described
The tie point and the second operational amplifier U6 of one end of the other end of the 17th resistance R17 and the 18th resistance R18
Inverting input terminal coupling, the other end of the 18th resistance R18 is coupled with one end of the 19th resistance R19, described
The tie point and the second operational amplifier U6 of one end of the other end of the 18th resistance R18 and the 19th resistance R19
Normal phase input end coupling, the other end of the 19th resistance R19 is coupled with one end of the 20th resistance R20, described
The other end of 20th resistance R20 is grounded, the other end of the 19th resistance R19 and one end of the 20th resistance R20
Tie point coupled with the normal phase input end of the third operational amplifier U7, the other end of the 16th resistance R16 and institute
State one end coupling of the 21st resistance R21, one end of the other end of the 16th resistance R16 and the 21st resistance R21
Tie point coupled with the normal phase input end of the third operational amplifier U7, the other end of the 21st resistance R21 with
The third operational amplifier U7 output end coupling, the output end of third operational amplifier U7 are coupled with the judgment module 130,
The temperature signal that the detection module 120 detects is converted to voltage signal to export to judgment module 130.
Judgment module 130 is used to judge according to the voltage signal that the detection module 120 exports the temperature of the charger
Whether preset temperature value is higher than, and output one judges signal.
As an implementation, the judgment module 130 may include main control chip and a voltage comparator circuit, described
Main control chip and voltage comparator circuit coupling, preset temperature value can store in main control chip.
The voltage comparator circuit can be the window comparator being made of LM339 voltage comparator chip, LM339 integrated package
Inside dress is there are four independent voltage comparator, and the characteristics of voltage comparator is: 1) offset voltage is small, representative value 2mV；2)
Supply voltage range is wide, single supply 2-36V, and dual-supply voltage is ± 1V- ± 18V；3) internal resistance for comparing signal source is limited
It is wider；4) common mode range is very big, is 0~(Ucc-1.5V) Vo；5) differential input voltage range is larger, and big arrive can be equal to power supply
Voltage；6) output terminal potential can be selected flexibly and easily.
The main control chip is for driving the voltage comparator circuit, and as an implementation, which can be
A kind of IC chip has signal handling capacity.It can be digital signal processing chip (DSP), specific integrated circuit
(ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components.
Alarm module 140 is used to be warned according to the judgement signal that the detection judgment module 130 exports to determine whether issuing
Show information, to charger when the temperature is excessively high, can to user issue prompt, so that user can cut off electricity in time
Source protects charger or is electrically charged the safety of equipment.As an implementation, which can be a buzzer,
Buzzer is a kind of electro-acoustic element of miniaturization, can be divided into piezoelectric type and electromagnetic type two major classes by working principle.Piezoelectric type bee
Ring device is made of Athens potsherd, when being subject to audio signal to piezoelectric ceramic piece, under the action of inverse piezoelectric effect, and ceramics
Piece will send out upper mechanical oscillation with the frequency of audio signal, to make a sound.The inside of electromagnetic buzzer by magnet, coil and
The composition such as vibrating diaphragm, when tone currents flows through coil, coil generates magnetic field, and vibrating diaphragm is then with audio signal identical week
Phase is attracted and is discharged, to generate mechanical oscillation, and issues the sound under the action of resonator.It in the present embodiment, can root
According to needing to select suitable buzzer, the design of the buzzer can be based on FPGA (Field-Programmable Gate
Array), i.e. field programmable gate array or CPLD (Complex Programmable Logic Device), i.e., complexity can be compiled
Journey logical device is designed.
Control module 150 can be used in controlling entire circuit, and as an implementation, control module 150 can
Think that 51 series monolithics, single-chip microcontroller are a kind of IC chips, is using very large scale integration technology with number
According to the central processor CPU of processing capacity, random access memory ram, read only memory ROM, a variety of I/O mouthfuls and interrupt system, fixed
When the functions such as device/counter (may further include display driver circuit, pulse-width modulation circuit, analog multiplexer, A/D conversion
The circuits such as device) it is integrated into the small and perfect microcomputer system constituted on one piece of silicon wafer.Especially 51 serial monolithics
Machine is widely applied in electronic technology field, with small in size, high reliablity, the performance that control ability is strong, excellent and valence
The advantages that lattice ratio.
Referring to figure 4., Fig. 4 is a kind of structural block diagram of charger 200 provided in an embodiment of the present invention, the charger
200 include charging interface 210, plug 220 and above-mentioned charging unit 100 for connecting external power supply, the charging
Mouth 210, the plug 220 are coupled with the charging unit 100.
The charging interface 210 is electrically charged equipment for connecting, and as an implementation, the charging interface 210 can
Think USB interface, the equipment that is electrically charged can be any electronic product being electrically charged, for example, PC (personal
Computer, PC), tablet computer, smart phone, wearable device etc. can be electrically charged equipment.
The plug 220 is used to connect the external power supply of the charger 200, and plug 220 can connect socket to even
Connect external power supply.
As an implementation, memory can be set in the charger 200, can be used for carrying out data storage, this is deposited
Reservoir can store various software programs and module, and memory can include but is not limited to random access memory (Random
Access Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory
(Programmable Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable
Read-Only Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable
Read-Only Memory, EEPROM) etc.；The charger 200 is also provided with voice device, and memory can be used for storing sound
Pleasure, song etc. can be put by voice device by music, outside song, which is filled to being electrically charged equipment on one side
Electricity is put the music on one side.
As an implementation, display device can also be set on the charger 200, for watching video or the display
Device has other display functions.
As an implementation, which can also be arranged wireless module, which can pass through nothing
Wire module is communicated with the electronic equipment with communication function, which can be bluetooth, wifi etc..
The working principle of charging unit 100 and charger 200 is: when the external power supply of charger 200 passes through charger 200
When to being electrically charged equipment charge, the charging unit 100 inside charger 200 controls detection module 120 by control module 150
The temperature of charger 200 is detected, and is exported the temperature signal as a voltage signal to judgment module 130, judgment module 130
Judge whether the temperature inside charger 200 is higher than preset temperature according to this voltage signal, and exports one and judge signal extremely
Power-off modular 110 and alarm module 140 judge signal to determine whether cutting charger 200 according to it in power-off modular 110
External power supply, while alarm module 140 also according to the judgement signal judge whether issue warning；When this judges signal for charging
When the temperature of device 200 is higher than preset temperature, power-off modular 110 is used to cut off the external power supply of the charger 200, alarm module
140 issue information warning, when this judges that signal is equal to or less than preset temperature for the temperature of charger 200, power-off modular 110
For not cutting off the external power supply of the charger 200, alarm module 140 does not issue information warning, and such charger 200 can be with
Know when the temperature is excessively high, being automatically powered off by power-off modular 110 and issuing information warning for being electrically charged equipment user, uses
Person can thereby may be ensured that in charger 200 with hand off power supply or be electrically charged equipment and be burned when the temperature is excessively high, significantly
It improves charger 200 or is electrically charged the safety of equipment.
In conclusion the present invention provides a kind of charging unit 100 and charger 200, when the external power supply of charger 200 is logical
Electric appliance 200 is overcharged to when being electrically charged equipment charge, the temperature of the charger 200 is detected by the detection module 120, and
It exports the temperature signal as a voltage signal to judgment module 130, judgment module 130 judges according to this voltage signal
Whether the temperature inside charger 200 is higher than preset temperature, and exports one and judge signal to power-off modular 110, to power off mould
Block 110 can judge whether signal cuts off the external power supply of the charger 200 according to this；For example, when this judges signal to fill
When the temperature of electric appliance 200 is higher than preset temperature, power-off modular 110 is used to cut off the external power supply of the charger 200；When this is sentenced
When break signal is that the temperature of charger 200 is not higher than preset temperature, power-off modular 110 is not used in the cutting charger 200
External power supply；Allow charger 200 when the temperature is excessively high, is automatically powered off by power-off modular 110, thereby may be ensured that and fill
Electric appliance 200 is preventing from being burned when the temperature is excessively high, substantially increases the safety of charger 200.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of charging unit, be applied to charger, which is characterized in that the charging unit include judgment module, detection module,
Power-off modular, alarm module, control module, the control module respectively with the detection module, judgment module, described disconnected
Electric module, alarm module coupling, the judgment module couples with the detection module, the judgment module respectively with it is described
Power-off modular, alarm module coupling, the power-off modular are coupled with the external input power of the charger；
The detection module is used to detect the temperature signal of the charger, and exports a voltage signal；
The judgment module is used to judge whether the temperature of the charger is higher than preset temperature value according to the voltage signal, defeated
One judges signal out；
The power-off modular is used for according to the external power supply for judging signal and whether cutting off the charger；
Wherein, the power-off modular includes the first input circuit, the first NAND gate circuit, the second input circuit, the second NAND gate
Circuit, first input circuit are coupled with first NAND gate circuit, first NAND gate circuit with described second with
Not circuit coupling, second input circuit are coupled with second NAND gate circuit；
First input circuit includes first port, first resistor, second resistance, first capacitor, the second capacitor, third electricity
Appearance, the first comparison amplifier and three terminal regulator；The first port is coupled with one end of the first resistor, and described first
The other end of resistance is coupled with the external input power of the charger, one end of the first resistor and the first capacitor
One end coupling, the other end ground connection of the first capacitor, the normal phase input end of first comparison amplifier and the first end
Mouth coupling, the inverting input terminal of first comparison amplifier are coupled with one end of the second resistance, the second resistance
The other end is coupled with the external input power of the charger, the inverting input terminal of first comparison amplifier respectively with it is described
One end coupling of the cathode terminal of three terminal regulator, second capacitor, the anode tap of the three terminal regulator, second capacitor
The other end be grounded, the power positive end of first comparison amplifier is coupled with one end of the third capacitor, described
The other end of three capacitors is grounded, and the output end of first comparison amplifier is coupled with first NAND gate circuit.
2. charging unit according to claim 1, which is characterized in that first NAND gate circuit include 3rd resistor,
4th resistance, the 5th resistance, the 4th capacitor and the first NAND gate；One end of the 3rd resistor, the 4th resistance one
End, the 5th resistance one end coupled with the output end of first comparison amplifier, the 3rd resistor it is another
End is coupled with the external input power of the charger, and the other end of the 4th resistance is equipped with the first connectivity port, and described the
The other end of five resistance is coupled with the input terminal of first NAND gate, and the feeder ear of first NAND gate is respectively with described
One end of four capacitors, the charger external input power coupling, the 4th capacitor the other end ground connection, described first with
The control terminal of NOT gate is equipped with second connection end mouth, and the ground terminal of first NAND gate is grounded, the output of first NAND gate
End is coupled with second NAND gate circuit.
3. charging unit according to claim 2, which is characterized in that second input circuit includes second port,
Six resistance, the 7th resistance, the 8th resistance, the 9th resistance, diode, the 5th capacitor and triode；The second port and institute
One end coupling of the 5th capacitor is stated, the other end of the 5th capacitor is coupled with one end of the 6th resistance, the 6th electricity
The other end of resistance is coupled with the base stage of the triode, the base stage of the triode also respectively with one end of the 7th resistance,
The cathode of the diode couples, the hair of the other end of the 7th resistance and the anode of the diode with the triode
Emitter-base bandgap grading is coupled and is grounded, the collector of triode one end with one end of the 8th resistance, the 9th resistance respectively
Coupling, the other end of the 8th resistance are coupled with the external power supply of the charger, the other end of the 9th resistance and institute
State the coupling of the second NAND gate circuit.
4. charging unit according to claim 3, which is characterized in that second NAND gate circuit include the 6th capacitor with
The other end of second NAND gate, the 9th resistance is coupled with the input terminal of second NAND gate, first NAND gate
Output end is coupled with the control terminal of second NAND gate, the feeder ear of second NAND gate respectively with the 6th capacitor
The external power input coupling of one end, the charger, the other end ground connection of the 6th capacitor, second NAND gate
The output end of ground terminal ground connection, second NAND gate is equipped with third connectivity port.
5. charging unit according to claim 1, which is characterized in that the detection module include thermocouple, compensation circuit,
Amplifying circuit, the thermocouple are coupled with the compensation circuit, and the compensation circuit is coupled with the amplifying circuit, the amplification
Circuit is coupled with the judgment module.
6. charging unit according to claim 5, which is characterized in that the compensation circuit includes the tenth resistance, the 11st
Resistance, twelfth resistor, thirteenth resistor, the 14th resistance and battery, one end and the described 11st of the tenth resistance
One end of resistance couples, the tie point and the thermocouple of one end of one end and eleventh resistor of the tenth resistance
Cold end coupling, the other end of the tenth resistance are coupled with one end of the positive terminal of the battery, the twelfth resistor respectively,
The negative pole end of the battery is coupled with one end of the 14th resistance, and the other end of the 14th resistance is respectively with described
One end coupling of the other end, thirteenth resistor of 11 resistance, the other end of the twelfth resistor and the thirteenth resistor
Other end coupling, the tie point of the other end of the other end of the twelfth resistor and the thirteenth resistor and the amplification
Circuit coupling.
7. charging unit according to claim 6, which is characterized in that the amplifying circuit include the first operational amplifier,
Second operational amplifier, third operational amplifier, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance,
19 resistance, the 20th resistance, the 21st resistance, non-inverting input terminal and the thermocouple of first operational amplifier
Measurement end coupling, the output end of first operational amplifier respectively with one end of the 15th resistance, it is described 16th electricity
One end of resistance couples, and the other end of the 15th resistance is coupled with one end of the 17th resistance, the 15th resistance
The other end coupled with the tie point of one end of the 17th resistance with the inverting input terminal of first operational amplifier, institute
The other end for stating the 17th resistance is coupled with one end of the 18th resistance, the other end of the 17th resistance and described the
The tie point of one end of 18 resistance is coupled with the inverting input terminal of the second operational amplifier, the 18th resistance it is another
One end is coupled with one end of the 19th resistance, one end of the other end and the 19th resistance of the 18th resistance
Tie point is coupled with the normal phase input end of the second operational amplifier, the other end and the described 20th of the 19th resistance
One end of resistance couples, the other end ground connection of the 20th resistance, the other end and the described 20th of the 19th resistance
The tie point of one end of resistance is coupled with the normal phase input end of the third operational amplifier, the other end of the 16th resistance
It is coupled with one end of the 21st resistance, the connection of one end of the other end of the 16th resistance and the 21st resistance
Point is coupled with the normal phase input end of the third operational amplifier, the other end of the 21st resistance and the third operation
Amplifier out coupling.
8. a kind of charger, which is characterized in that the charger include charging interface, the plug for connecting external power supply and
Charging unit as claimed in claim 1 to 7, the charging interface, the plug are coupled with the charging unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611100309.3A CN106532835B (en) | 2016-12-06 | 2016-12-06 | Charging unit and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611100309.3A CN106532835B (en) | 2016-12-06 | 2016-12-06 | Charging unit and charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106532835A CN106532835A (en) | 2017-03-22 |
| CN106532835B true CN106532835B (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611100309.3A Expired - Fee Related CN106532835B (en) | 2016-12-06 | 2016-12-06 | Charging unit and charger |
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| CN108054910A (en) * | 2018-01-10 | 2018-05-18 | 四川阵风科技有限公司 | For electric installation |
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|---|---|---|---|---|
| CN201941762U (en) * | 2011-01-20 | 2011-08-24 | 洛阳市黄河软轴控制器股份有限公司 | High temperature alarm circuit for automotive retarder |
| JP2012200113A (en) * | 2011-03-23 | 2012-10-18 | Panasonic Corp | Battery pack and charging system |
| CN103326326A (en) * | 2007-12-21 | 2013-09-25 | 三美电机株式会社 | Battery pack |
| CN203561901U (en) * | 2013-11-22 | 2014-04-23 | 长春长光思博光谱技术有限公司 | PWM temperature controller for electrical detection system |
| CN204992755U (en) * | 2015-09-15 | 2016-01-20 | 广东恩亿梯电源有限公司 | Be applied to uninterrupted power source's (UPS) static on -off control cabinet of novel dual supply |
| CN106100040A (en) * | 2016-07-12 | 2016-11-09 | 乐视控股（北京）有限公司 | A kind of method and apparatus preventing charger excess temperature |
-
2016
- 2016-12-06 CN CN201611100309.3A patent/CN106532835B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326326A (en) * | 2007-12-21 | 2013-09-25 | 三美电机株式会社 | Battery pack |
| CN201941762U (en) * | 2011-01-20 | 2011-08-24 | 洛阳市黄河软轴控制器股份有限公司 | High temperature alarm circuit for automotive retarder |
| JP2012200113A (en) * | 2011-03-23 | 2012-10-18 | Panasonic Corp | Battery pack and charging system |
| CN203561901U (en) * | 2013-11-22 | 2014-04-23 | 长春长光思博光谱技术有限公司 | PWM temperature controller for electrical detection system |
| CN204992755U (en) * | 2015-09-15 | 2016-01-20 | 广东恩亿梯电源有限公司 | Be applied to uninterrupted power source's (UPS) static on -off control cabinet of novel dual supply |
| CN106100040A (en) * | 2016-07-12 | 2016-11-09 | 乐视控股（北京）有限公司 | A kind of method and apparatus preventing charger excess temperature |
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