CN205693385U - Battery charger - Google Patents
Battery charger Download PDFInfo
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- CN205693385U CN205693385U CN201620291846.XU CN201620291846U CN205693385U CN 205693385 U CN205693385 U CN 205693385U CN 201620291846 U CN201620291846 U CN 201620291846U CN 205693385 U CN205693385 U CN 205693385U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 7
- 230000005669 field effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 6
- 230000006866 deterioration Effects 0.000 abstract description 3
- 239000007772 electrode material Substances 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 15
- 229910052744 lithium Inorganic materials 0.000 description 15
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910010710 LiFePO Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
This utility model relates to charging technique field, is specifically related to a kind of battery charger.It includes input block and battery, and output unit, electrically connects described battery, for providing rechargeable electrical energy for this battery；Voltage conversion unit, electrically connects described input block, is the charging of described battery for the electric energy of input block is supplied to output unit；Current/voltage detector unit, electrically connects described output unit, for detecting charging voltage value and the charging current value of output unit；Charging control unit, its input electrically connects described current/voltage detector unit, and its outfan electrically connects described output unit, for according to the described charging voltage value inputted and described charging current value, adjusting described output unit and export the electric energy of described battery.Safe and reliable rechargeable electrical energy is provided for battery；Make will not be in higher voltage or big electric current in charging process for a long time, the deterioration of electrode material in battery can be alleviated；Thus extend the service life of battery.
Description
[technical field]
This utility model relates to charging technique field, concrete, relates to a kind of battery charger.
[background technology]
Lithium battery owing to having that energy density is high, have extended cycle life, the advantage such as lightweight, the most just at portable electric
Subset obtains extensively application.
During lithium battery uses, it is often necessary to use lithium battery charger that lithium battery is charged, but lithium is electric
Pond requires height to peripheral protection circuit, can not use large current charge, can shorten battery in the case of lithium battery voltage is the lowest
Service life；And at battery palpus constant-voltage charge in time protecting voltage, the most easily overcharge, it is desirable to charging current is according to lithium battery
Voltage be adjusted.
But existing lithium battery charging circuit can not adjust charging current automatically according to the voltage of lithium battery, is susceptible to lithium
The situation that during battery low-voltage, charging current is excessive, and shorten the service life of battery, and it may also happen that lithium battery overcharges, lithium
The situation that battery temperature is too high so that lithium battery damages, and even can cause the potential safety hazards such as fire.
[utility model content]
The purpose of this utility model aims to solve the problem that any one problem above-mentioned, it is provided that a kind of battery charger.
For realizing this purpose, this utility model adopts the following technical scheme that
This utility model provides a kind of battery charger, and it includes input block and battery, also includes:
Output unit, electrically connects described battery, for providing rechargeable electrical energy for this battery；
Voltage conversion unit, electrically connects described input block, for the electric energy of input block is supplied to output unit is
Described battery charges；
Current/voltage detector unit, electrically connects described output unit, for detecting the charging voltage value of output unit and filling
Electricity current value；
Charging control unit, its input electrically connects described current/voltage detector unit, and the electrical connection of its outfan is described
Output unit, for according to the described charging voltage value inputted and described charging current value, adjusting described output unit and export
The electric energy of described battery.
Further, described circuit also includes input protected location,
Described input protected location, electrically connects described input block, for detect magnitude of voltage that this input block inputted,
And this magnitude of voltage is fed back to described charging control unit.
Concrete, disclosed in one embodiment of this programme, described input protected location includes input voltage measurement
Unit and the first divider resistance being serially connected and the second divider resistance,
The input of described input voltage measurement unit electrically connects described first divider resistance and the series connection of the second divider resistance
Common port, outfan electrically connect described charging control unit.
Optionally, disclosed in an embodiment of this programme, described input voltage measurement unit includes series connection
First error amplifier and the first comparator, and the outfan of the first error amplifier electrically connects wherein the one of this first comparator
Input；
The common port of described first divider resistance and the series connection of the second divider resistance electrically connects its of this first error amplifier
In an input；The outfan of described first comparator electrically connects described charging control unit.
Further, described circuit also includes battery temperature protected location,
Described battery temperature protected location, electrically connects described output unit, for detect the current temperature of described battery and
Battery Current Temperatures is fed back to described charging control unit.
Concrete, described battery temperature protected location includes temperature detecting unit and attached temperature-sensitive electricity on the battery
Resistance, one end ground connection of described critesistor, the other end electrically connect described temperature detecting unit, the outfan of this temperature detecting unit
Electrically connect described charging control unit.
Concrete, described temperature detecting unit includes the second error amplifier and second comparator of series connection, and second
The outfan of error amplifier electrically connects a wherein input of this second comparator；
The other end of described critesistor electrically connects a wherein input of this second error amplifier；Described second compares
The outfan of device electrically connects described charging control unit.
Further, described charging control unit also includes logic control element,
Described logic control element, electrically connects described charging control unit and output unit, is used for receiving charging and controls single
The control signal of unit's output produces driving signal, to drive the described output unit of control to export the electric energy of described battery.
Optionally, described driving signal is pulse-width signal.
Concrete, described output unit includes the first switching tube, second switch pipe and detection resistance；
The grid of described first switching tube electrically connects described charging control unit, drain electrode electrically connects described second switch pipe
Base stage, source electrode are electrically；
The base stage electrical connection drain electrode of described first switching tube of described second switch pipe, emitter-base bandgap grading electrically connect described input block
Positive input terminal, colelctor electrode electrically connect described detection resistance one end；
The other end of described detection resistance electrically connects the positive pole of described battery.
Concrete, described first switching tube is field effect transistor.
Concrete, described second switch pipe is audion.
Optionally, described voltage conversion unit is dc-dc boost circuit.
Compared with prior art, this utility model possesses following advantage:
1, the battery charger described in this utility model scheme, includes the charging voltage that can detect output unit in real time
Value and charging current value, and adjust described output unit according to this charging voltage value and charging current value and export described battery
Electric energy, thus provide safe and reliable rechargeable electrical energy for battery；Make will not to be in for a long time in charging process higher
Voltage or big electric current, can alleviate the deterioration of electrode material in battery；Thus extend the service life of battery, improve the safety of battery
Property；
2, further, charging circuit described in the utility model also includes input protected location, in testing circuit
The magnitude of voltage that input block is inputted, and this magnitude of voltage is fed back to described charging control unit with regulation output unit export
The electric energy of battery；I.e. prevent this circuit because input voltage too high and damage, extend the service life of battery, improve charging circuit
Safety；
3, further, charging circuit described in the utility model also includes battery temperature protected location, by temperature-sensitive electricity
The temperature of resistance detection battery, and by battery temperature feedback of status to charging control unit, thus control output unit and be input to electricity
The electric energy in pond, battery can be caused damage by the heat preventing battery from producing in charging process, extends the life-span of battery further,
Improve the safety that battery uses.
Aspect and advantage that this utility model is additional will part be given in the following description, and these will be from explained below
In become obvious, or recognized by the embodiment of this programme.
[accompanying drawing explanation]
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will be to embodiment or prior art
In description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this utility model
Some embodiments, but this utility model is not limited to this.
Fig. 1 is the structural representation in an embodiment of a kind of battery charger of this utility model；
Fig. 2 is the structural representation in an embodiment of a kind of battery charger of this utility model；
Fig. 3 is the structural representation in an embodiment of a kind of battery charger of this utility model.
[detailed description of the invention]
With exemplary embodiment, this utility model is further described below in conjunction with the accompanying drawings, the example of described embodiment
Shown in the drawings, the most same or similar label represents same or similar element or has same or like
The element of function.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining this utility model, and can not
It is construed to restriction of the present utility model.Additionally, if it is known that the detailed description of technology is for illustrating feature of the present utility model
It is unnecessary, is then omitted.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative used herein " ", "
Individual ", " described " and " being somebody's turn to do " may also comprise plural form.It is to be further understood that description of the present utility model uses
Wording " include " referring to there is described feature, integer, step, operation, element and/or assembly, but it is not excluded that existence or
Add other features one or more, integer, step, operation, element, assembly and/or their group.It should be understood that when us
Claiming element to be " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements, or can also
There is intermediary element.Additionally, " connection " used herein or " coupling " can include wireless connections or wireless couple.Used here as
Wording "and/or" include that what one or more was associated lists the whole of item or any cell and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (include technology art
Language and scientific terminology), have with the those of ordinary skill in this utility model art be commonly understood by identical meaning.Also
It should be understood that those terms defined in such as general dictionary, it should be understood that there is the context with prior art
In the consistent meaning of meaning, and unless by specific definitions as here, otherwise will not be by idealization or the most formal
Implication is explained.
The detailed description of the invention of this programme is detailed below.
This utility model provides a kind of battery charger, during charging battery, needs to work as battery
Front voltage detects, and this detection can be real-time or be periodically detected certainly, to determine that the different charging modes of employing is
This battery is charged, thus while to quickly charging battery, does not interferes with the service life of battery, and this utility model
Described in circuit use low-voltage, large current charge when battery is charged.
It should be noted that charging circuit described in the utility model can apply to lithium battery, it is also possible to be applied to other
The battery of type；Further, in actual applications, set of cells is generally combined by one or more cells, permissible
Set of cells and cell are referred to as battery；Primary entity generally, due to charging is usually cell, so not special
In the case of very indicating, alleged battery is often referred to cell.
Concrete, refer to accompanying drawing 1, show for the structure in an embodiment of a kind of battery charger of this utility model
It is intended to.Described circuit includes input block, voltage conversion unit, output unit 30 and the battery VBAT being sequentially connected with；Wherein
Described voltage conversion unit can be dc-dc boost circuit, and in an embodiment of this programme, described voltage is changed
Unit is DC-DC BUCK reduction voltage circuit, electrically connects described input block, for the DC voltage Vin inputted by input block
Dropping to can be for the appropriate voltage value of output unit 30 charging, it is simple to output unit 30 provides safe electric energy for battery VBAT, improves
The safety of system.
Further, described charging circuit also includes input protected location 10 and charging control unit, and described input is protected
Protect unit, electrically connect described input block, for detecting magnitude of voltage that this input block inputted and this magnitude of voltage being fed back to
Described charging control unit.This charging control unit arrives according to magnitude of voltage control output unit 30 output according to the input obtained
The electric energy of battery VBAT, it is achieved input overvoltage protection, prevents this circuit because input voltage too high and damages, extend the use of battery
In the life-span, improve the safety of charging circuit.
Concrete, see accompanying drawing 1, in an embodiment of the present utility model, described input protected location 10 includes
Input voltage measurement unit and the first divider resistance R1 being serially connected and the second divider resistance R2.In described input block defeated
Charging voltage Vin entered after the dividing potential drop of the first divider resistance R1 and the second divider resistance R2, described first divider resistance R1
The input of this voltage detection unit is accessed, another of the second divider resistance R2 again with the common port of the second divider resistance R2 series connection
End ground connection, will be linked into the input of voltage detection unit, voltage detection unit by the magnitude of voltage on this second divider resistance R2
According to internal judgement, the input voltage parameter that will determine that out feeds back to described charging control unit again, then by described charging control
Unit processed controls, according to this voltage parameter, the electric energy that output unit is battery charging, when input voltage vin is beyond set in advance
During voltage range, described charging control unit disconnects the electric energy that output unit 30 charges for battery, prevents input voltage vin too high
Or too low and damage charging circuit or battery, shorten the life-span of battery.
Concrete, refer to accompanying drawing 2, in an embodiment of the present utility model, described voltage detection unit includes
Series connection the first error amplifier A1 and the first comparator B1, and the outfan of the first error amplifier A1 electrically connect this first ratio
A wherein input of relatively device B1, is negative input end shown in Fig. 2, but it can be appreciated that described first error amplifier A1
Outfan can also electrically connect the positive input terminal of this first comparator B1, and this is not construed as limiting by the present embodiment.
Concrete, in an exemplary embodiment of the present utility model, described first divider resistance R1 and the second dividing potential drop
The public end of resistance R2 series connection electrically connects the wherein input of this first error amplifier A1, and the first error amplifier A1
Another input input have the first default reference voltage Vref 1, by the first error amplifier A1 amplify its positive input terminal with
The difference of the magnitude of voltage that negative input end is inputted, then this difference is input to a wherein input of the first comparator B1, in like manner
An other input input of the first comparator B1 has the second default reference voltage Vref 2, by comparing the first error approach
Size between difference and the second default reference voltage Vref 2 that device A1 is exported, then the output by this first comparator B1
End is connected to this charging control unit, judges that magnitude of voltage Vin that input block inputted is whether in default scope.When
So, it can be appreciated that the value of described first reference voltage Vref 1 and the second reference voltage Vref 2 can be according to the concrete suitable model of Vin
Enclose and the resistance of the first divider resistance R1 and the second divider resistance R2 specifically sets.
Further, referring to accompanying drawing 1, in an embodiment of the present utility model, described output unit 30 also includes
The grid electrical connection having the first switching tube Q1, second switch pipe Q2 and detection resistance R3, wherein said first switching tube Q1 is described
Charging control unit, drain electrode the electrical connection base stage of described second switch pipe Q2, source electrode are electrically；And described second switch pipe Q2
The base stage electrical connection drain electrode of described first switching tube Q1, emitter-base bandgap grading electrically connect the positive input terminal in described input block, colelctor electrode
Electrically connect one end of described detection resistance R3, and the other end of described detection resistance R3 electrically connects the positive pole of described battery VBAT.
And in an exemplary embodiment of this programme, described first switching tube Q1 is field effect transistor, described second switch pipe Q2 is
Audion.
Further, described circuit also includes current/voltage detector unit, and described current/voltage detector unit is even
It is connected on the two ends of detection resistance R3, arrives charging current value and the charging voltage of battery VBAT for detecting output unit 30 output
Value, the negative pole of battery VBAT is connected to ground again, therefore the voltage detected by described current/voltage detector unit is battery VBAT
Current voltage value, and the outfan of described current/voltage detector unit is electrically connected with charging control unit, and then makes charging
Control unit, according to the charging voltage value detected by this current/voltage detector unit and charging current value, controls output single
Unit 30 output is to the electric energy of battery VBAT.
Further, in an embodiment of the present utility model, described charging control unit also includes logic control
The input of unit, i.e. this logic control element electrically connects the outfan of described charging control unit, this logic control element
Outfan electrically connects the grid of described first switching tube Q1, is used for receiving the control signal of described charging control unit output and producing
Raw driving signal, thus drive the switching frequency of the first switching tube Q1, thus regulate the average electricity that the first switching tube Q1 is exported
Flow valuve, and then by after the amplification of second switch pipe Q2, for being connected to the electricity of the collector terminal of described second switch pipe Q2
Pond VBAT charges, and the driving signal of wherein said logic control element output can be pulse-width modulation PWM ripple signal.
Further, can damage battery owing to the charging temperature of battery is too high and may set off an explosion, temperature is too low the most very
Battery is full of by difficulty.Therefore, the temperature of battery charging is controlled between 0-40 DEG C, if beyond this temperature range, just stopped
Only to lithium cell charging.In this programme, described circuit also includes battery temperature protected location 20, and the protection of this battery temperature is single
Unit 20 electrical connection charging control unit and output unit 30, for detecting described temperature current for battery VBAT and by battery
VBAT Current Temperatures feeds back to described charging control unit, it is simple to charging control unit detects when battery Current Temperatures is overheated,
By adjusting the dutycycle that logic control element exports the PWM ripple signal of the first switching tube Q1, reduce the first switching tube Q1 defeated
The average current size gone out, thus reduce second switch pipe Q2 and export the electric energy on battery VBAT；Can even is that shutoff
One switching tube Q1 so that it is zero that the electric current that the drain electrode end of the first switching tube Q1 is exported is situated between, then the base stage of second switch pipe Q2
Voltage is zero, and second switch pipe Q2 ends, thus the collector terminal of second switch pipe Q2 output electric current is the most almost nil, and it is right to stop
The charging of battery VBAT, until battery temperature protected location 20 detects that the temperature of battery VBAT drops to zone of reasonableness, then improves
Logic control element exports the dutycycle of the PWM ripple signal of the first switching tube Q1, increases the average of the first switching tube Q1 output
Size of current, thus increase the second switch pipe Q2 charging current to battery VBAT, so circulate, prevent battery in charging process
Battery can be caused damage by the heat of middle generation, extends the life-span of battery further, improves the safety that battery uses.
Concrete, see accompanying drawing 3, in an embodiment of the present utility model, described battery temperature protected location 20 wraps
Include temperature detecting unit and attached critesistor Rntc on the battery, one end ground connection of described critesistor Rntc, separately
One end connects the input of described temperature detecting unit, and temperature-sensitive battery Rntc is serially connected in input also by the 3rd divider resistance R4
The positive output end of voltage Vin.Described critesistor Rntc and the 3rd divider resistance R4 constitutes potential-divider network, and by critesistor
Pressure drop on Rntc feeds back to temperature detecting unit.It can be appreciated that this embodiment make use of the resistance of critesistor Rntc with temperature
The feature of degree change, can be converted into the change in voltage on critesistor Rntc by the change of battery VBAT temperature, i.e. can determine whether electricity
The state of pond VBAT temperature.
Concrete, refer to accompanying drawing 3, in an embodiment of the present utility model, described battery temperature protected location 20
Include the second error amplifier A2 and the second comparator B2 of series connection, and the outfan electrical connection of the second error amplifier A2 should
A wherein input of the second comparator B2, is negative input end shown in Fig. 3, but it can be appreciated that described second error is amplified
The outfan of device A2 can also electrically connect the positive input terminal of this second comparator B2, and this is not construed as limiting by the present embodiment.Concrete,
In an exemplary embodiment of the present utility model, one end of described critesistor Rntc electrically connects this second error amplifier
A wherein input of A2, and the input of another input of the second error amplifier A2 has the 3rd default reference voltage Vref 3,
The difference of the magnitude of voltage that its positive input terminal is inputted is amplified with negative input end by the second error amplifier A2, then by defeated for this difference
Entering the wherein input to the second comparator B2, an in like manner other input input of the second comparator B2 has default the 4th
Reference voltage Vref 4, by compare the difference that the second error approach device A2 exported and the 3rd reference voltage Vref 3 preset it
Between size, then the outfan of this second comparator B2 is connected to this charging control unit, judges critesistor Rntc's
Whether magnitude of voltage is in default safety range, thus judges that whether the temperature of the battery VBAT that critesistor Rntc detected exists
In safety range.It should be understood, of course, that, the value of described 3rd reference voltage Vref 3 and the 4th reference voltage Vref 4 can be according to setting
The resistance of fixed temperature range and the 3rd divider resistance R4 specifically sets.
It should be noted that this programme uses described current/voltage detector unit, detect in output unit 30 and sample
Current voltage value on the charging current value inputted on resistance R3 and battery VBAT, and then charging control unit control logic control
Unit adjusts the electric energy that output unit 30 is input on battery VBAT, on the premise of not affecting battery life, it is achieved to electricity
The quick charge in pond.
Concrete, in an embodiment of the present utility model, before battery VBAT is charged, it is thus necessary to determine that
Charging cut-in voltage Vth1, charging critical voltage Vth2 and the charging applied when charging by battery VBAT limit voltage Vth3,
And this charging cut-in voltage Vth1 should be less than charging limit voltage less than charging critical voltage Vth2, charging critical voltage Vth2
Vth3.Specifically, can determine previously according to battery parameters such as the capacity of battery VABT, maximum current, maximum voltages and fill
Electric-opening voltage Vth1, charging critical voltage Vth2 and charging limit voltage Vth3；Or can be according to the battery VBAT obtained
The battery operating parameter such as current electric current, voltage, and calculate charging cut-in voltage according to the above-mentioned battery operating parameter obtained
Vth1, charging critical voltage Vth2 and charging limit voltage Vth3.The most conventional positive electrode LiFePO4The charging of class is critical
Voltage can be 3.550V or 3.450V, the non-LiFePO of positive electrode4The charging critical voltage of class can be 4.1V or 4.0V.
Concrete, refer to accompanying drawing 1, in an exemplary embodiment of the present utility model, battery VBAT is being carried out
During charging, obtained the current voltage value of battery VBAT by described measure voltage & current unit, when this cell voltage is less than described
During charging cut-in voltage Vth1, charging control unit controls the unlatching frequency of the first switching tube Q1 by described logic control element
Rate, then by second switch pipe Q2, battery VBAT is carried out trickle charge, in an exemplary embodiment of the present utility model,
Described charging cut-in voltage Vth1=2.2.V；Further, when battery VBAT voltage is more than charging cut-in voltage Vth1, right
This battery VBAT carries out constant-current charge, and using a constant big electric current is that battery VBAT carries out quick charge, of the present utility model
In one exemplary embodiment, during for battery VBAT constant-current charge, the current value used can reach 1.5A；Until electric current/electricity
When pressure detector unit detects battery VBAT current voltage more than charging critical voltage Vth2, keep charged electrical by Isobarically Control
Pressing constant, the most described charging control unit regulates the dutycycle of the PWM ripple of described logic control element output, controls the first switch
The switching frequency of pipe Q1, and then keep constant voltage to be added in the two ends of battery VBAT, along with the carrying out of charging process, battery
The ion concentration of the positive pole of VBAT is more and more less, and diffusion velocity gradually decreases, and electric current is gradually reduced battery electric quantity the most at last and is full of；
Certainly, in order to avoid the impact on the battery VBAT life-span that overcharges, when current/voltage detector unit detects battery two ends
When voltage limits voltage Vth3 more than charging, regulated the electricity of described logic control element output by described charging control unit
Flat, so that the drain electrode end output voltage of the first switching tube Q1 is close to zero, and then second switch pipe Q2 is ended, stop
Charge for described battery VBAT, it is achieved over-charging of battery is protected.
In sum, the battery charger described in this utility model scheme, include and can detect output unit in real time
Charging voltage value and charging current value, and adjust the output of described output unit according to this charging voltage value and charging current value
To the electric energy of described battery, while ensureing quick charge, safe and reliable rechargeable electrical energy can be provided for battery；Make filling
Electric process will not be in higher voltage or big electric current for a long time, the deterioration of electrode material in battery can be alleviated；Thus extend
In the service life of battery, improve the safety of battery
In description mentioned herein, although illustrate substantial amounts of detail.It is to be appreciated, however, that this practicality
Novel embodiment can be put into practice in the case of not having these details.In certain embodiments, it is not shown specifically public affairs
Method, structure and the technology known, in order to do not obscure the understanding of this description.
Although having been illustrated with exemplary embodiments more of the present utility model above, but those skilled in the art will
Understand, in the case of without departing from principle of the present utility model or spirit, these exemplary embodiments can be made a change, this
The scope of utility model is limited by claim and equivalent thereof.
Claims (12)
1. a battery charger, it includes input block and battery, it is characterised in that described charging circuit also includes:
Output unit, electrically connects described battery, for providing rechargeable electrical energy for this battery；
Voltage conversion unit, electrically connects described input block, is described for the electric energy of input block is supplied to output unit
Battery charges；
Current/voltage detector unit, electrically connects described output unit, for detecting charging voltage value and the charged electrical of output unit
Flow valuve；
Charging control unit, its input electrically connects described current/voltage detector unit, and the described output of its outfan electrical connection is single
Unit, for according to the described charging voltage value inputted and described charging current value, adjusting described output unit and export described electricity
The electric energy in pond；
Input protected location, electrically connects described input block, for detecting magnitude of voltage that this input block inputted and by this electricity
Pressure value feeds back to described charging control unit.
Circuit the most according to claim 1, it is characterised in that: described input protected location includes input voltage measurement list
Unit and the first divider resistance of being serially connected and the second divider resistance,
The input of described input voltage measurement unit electrically connects described first divider resistance and the public affairs of the second divider resistance series connection
End, outfan electrically connect described charging control unit altogether.
Circuit the most according to claim 2, it is characterised in that: described input voltage measurement unit includes the first of series connection
Error amplifier and the first comparator, and the outfan of the first error amplifier electrically connects a wherein input of this first comparator
End；
The common port of described first divider resistance and the series connection of the second divider resistance electrically connects wherein the one of this first error amplifier
Input；The outfan of described first comparator electrically connects described charging control unit.
Circuit the most according to claim 1, it is characterised in that: also include battery temperature protected location,
Described battery temperature protected location, electrically connects described output unit, for detecting the current temperature of described battery and by electricity
Pond Current Temperatures feeds back to described charging control unit.
Circuit the most according to claim 4, it is characterised in that: described battery temperature protected location includes temperature detection list
First and attached critesistor on the battery, one end ground connection of described critesistor, the other end electrically connect described temperature detection
Unit, the outfan of this temperature detecting unit electrically connects described charging control unit.
Circuit the most according to claim 5, it is characterised in that: described temperature detecting unit includes the second error of series connection
Amplifier and the second comparator, and the outfan of the second error amplifier electrically connects a wherein input of this second comparator；
The other end of described critesistor electrically connects a wherein input of this second error amplifier；Described second comparator
Outfan electrically connects described charging control unit.
Circuit the most according to claim 1, it is characterised in that: described charging control unit also includes logic control list
Unit,
Described logic control element, electrically connects described charging control unit and output unit, is used for receiving charging control unit defeated
The control signal gone out is to produce driving signal, to drive the described output unit of control to export the electric energy of described battery.
Circuit the most according to claim 7, it is characterised in that: described driving signal is pulse-width signal.
Circuit the most according to claim 1, it is characterised in that: described output unit includes the first switching tube, second opens
Close pipe and detection resistance；
The grid of described first switching tube electrically connects described charging control unit, the base of the drain electrode described second switch pipe of electrical connection
Pole, source electrode are electrically；
The base stage electrical connection drain electrode of described first switching tube of described second switch pipe, emitter-base bandgap grading are just electrically connecting described input block
Input, colelctor electrode electrically connect one end of described detection resistance；
The other end of described detection resistance electrically connects the positive pole of described battery.
Circuit the most according to claim 9, it is characterised in that: described first switching tube is field effect transistor.
11. circuit according to claim 9, it is characterised in that: described second switch pipe is audion.
12. circuit according to claim 1, it is characterised in that: described voltage conversion unit is dc-dc boost electricity
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620291846.XU CN205693385U (en) | 2016-04-08 | 2016-04-08 | Battery charger |
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790358A (en) * | 2016-04-08 | 2016-07-20 | 北京奇虎科技有限公司 | Battery charging circuit |
| CN106100026A (en) * | 2016-06-24 | 2016-11-09 | 哈尔滨工业大学 | A kind of satellite power supply cadmium-nickel storage cell charging regulator |
| CN107645189A (en) * | 2017-09-26 | 2018-01-30 | 努比亚技术有限公司 | Charge protection method and mobile terminal |
| CN109687695A (en) * | 2017-10-19 | 2019-04-26 | 华硕电脑股份有限公司 | Power-supply system |
| TWI661648B (en) * | 2018-04-18 | 2019-06-01 | 神基科技股份有限公司 | Charging circuit and charging-controlling method |
| US10608457B2 (en) | 2018-06-28 | 2020-03-31 | Getac Technology Corporation | Charging circuit and method of controlling charging |
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2016
- 2016-04-08 CN CN201620291846.XU patent/CN205693385U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790358A (en) * | 2016-04-08 | 2016-07-20 | 北京奇虎科技有限公司 | Battery charging circuit |
| CN106100026A (en) * | 2016-06-24 | 2016-11-09 | 哈尔滨工业大学 | A kind of satellite power supply cadmium-nickel storage cell charging regulator |
| CN106100026B (en) * | 2016-06-24 | 2018-12-11 | 哈尔滨工业大学 | A kind of satellite power supply nickel-cadmium storage battery charging regulator |
| CN107645189A (en) * | 2017-09-26 | 2018-01-30 | 努比亚技术有限公司 | Charge protection method and mobile terminal |
| CN107645189B (en) * | 2017-09-26 | 2021-05-25 | 努比亚技术有限公司 | Charging protection method and mobile terminal |
| CN109687695A (en) * | 2017-10-19 | 2019-04-26 | 华硕电脑股份有限公司 | Power-supply system |
| CN109687695B (en) * | 2017-10-19 | 2020-06-26 | 华硕电脑股份有限公司 | Power supply system |
| TWI661648B (en) * | 2018-04-18 | 2019-06-01 | 神基科技股份有限公司 | Charging circuit and charging-controlling method |
| US10608457B2 (en) | 2018-06-28 | 2020-03-31 | Getac Technology Corporation | Charging circuit and method of controlling charging |
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Effective date of registration: 20220727 Address after: Room 801, 8th floor, No. 104, floors 1-19, building 2, yard 6, Jiuxianqiao Road, Chaoyang District, Beijing 100015 Patentee after: BEIJING QIHOO TECHNOLOGY Co.,Ltd. Address before: 100088 room 112, block D, 28 new street, new street, Xicheng District, Beijing (Desheng Park) Patentee before: BEIJING QIHOO TECHNOLOGY Co.,Ltd. Patentee before: Qizhi software (Beijing) Co.,Ltd. |