CN109212423A - Battery full charge testing circuit and its detection battery be full of method, electronic device - Google Patents
Battery full charge testing circuit and its detection battery be full of method, electronic device Download PDFInfo
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- CN109212423A CN109212423A CN201811345257.5A CN201811345257A CN109212423A CN 109212423 A CN109212423 A CN 109212423A CN 201811345257 A CN201811345257 A CN 201811345257A CN 109212423 A CN109212423 A CN 109212423A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 title claims description 13
- 238000007600 charging Methods 0.000 claims abstract description 87
- 230000005611 electricity Effects 0.000 claims abstract description 32
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 238000010280 constant potential charging Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000010277 constant-current charging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of battery full charge testing circuit and its method, electronic device that battery is full of are detected, first resistor is connected between battery and the charging circuit to charge to battery；Operational amplifier amplifies the voltage at first resistor both ends, and by amplified voltage output to comparator；Second input terminal of comparator is connected with reference voltage end, and comparator exports control instruction to decision circuitry for amplified voltage to be compared with reference voltage, and when voltage after amplification is less than reference voltage；Decision circuitry judges whether the duration of control instruction is equal to preset duration, if being equal to or more than preset duration, then determine that control instruction is effective, and judge whether the number of the effective control instruction received in preset time period is greater than preset times, if it is greater than or equal to preset times, then determine that battery fills with electricity, if it is less than preset times, determine that battery is not fully charged, whether fills with electricity so as to accurate judgement battery.
Description
Technical field
The present invention relates to battery boosting technology fields, more specifically to a kind of battery full charge testing circuit and its inspection
Survey method, the electronic device that battery is full of.
Background technique
Lithium ion battery due to having many advantages, such as high voltage, high-energy density, high security, low self-discharge rate, by
It is widely used in the fields such as electric car, energy-accumulating power station, smart phone and laptop.
The charging process of lithium ion battery can be divided into four-stage: trickle charge stage (pre-charging stage), constant current are filled
Electric stage, constant voltage charging phase and charging termination stage.
As shown in Figure 1, in the trickle charge stage, be first pre-charged the battery to discharge completely using trickle charge and (restored
Property charging).Use trickle charge when cell voltage is lower than 3V or so, trickle-charge current be constant-current charge electric current ten/
One.By taking constant charge current is equal to 1A as an example, trickle-charge current 100mA.
Constant-current charging phase improves charging current and carries out constant current when cell voltage rises to trickle charge threshold value or more
Charging.The electric current of constant-current charge is in 0.2C between 1.0C.Cell voltage is stepped up with constant-current charge process, general single-unit
The voltage that battery is set is 3.0V~4.2V.
Constant voltage charging phase, when cell voltage rises to 4.2V, constant-current charge terminates, and starts constant voltage charging phase.Electricity
Stream is according to the degree of saturation of battery battery core, and with the continuation of charging process, charging current is slowly reduced by maximum value, when being reduced to
When 0.01C, it is believed that charging termination.Wherein, C is with a kind of representation method of battery nominal capacity control electric current, as battery is
The capacity of 1000mAh, 1C are exactly charging current 1000mA.
In the charging termination stage, there are two types of typical charging termination judgment methods: minimum charge current determining method and timer
Determining method.Minimum charge current determining method monitors the charging current of constant voltage charging phase, and is reduced to 0.02C extremely in charging current
Charging is terminated when 0.07C.Timing when timer determining method is since constant voltage charging phase is terminated after two hours of persistently charging and is filled
Electric process.
But both methods is all unable to whether accurate judgement battery is full of, and is easy to overshoot battery, to battery
Aging effects are very big.
Summary of the invention
In view of this, the present invention provides a kind of battery full charge testing circuit and its detecting method, electronics that battery is full of
Device, to solve the problems, such as to be unable to whether accurate judgement battery is full of in the prior art.
To achieve the above object, the invention provides the following technical scheme:
A kind of battery full charge testing circuit, including first resistor, operational amplifier, comparator, second resistance and judgement electricity
Road；
The first resistor is connected between battery and the charging circuit to charge to the battery；
The first input end of the operational amplifier is connected with the first end of the first resistor, the operational amplifier
Second input terminal is connected with the second end of the first resistor, and the operational amplifier is used for the electricity to the first resistor both ends
Pressure amplifies, and by amplified voltage output to the comparator；
The first end of the second resistance is connected with the output end of the operational amplifier, the second end of the second resistance
Ground connection；
The first input end of the comparator is connected with the output end of the operational amplifier, and the second of the comparator is defeated
Entering end to be connected with reference voltage end, the comparator is used to for the amplified voltage being compared with reference voltage, and
When the amplified voltage is less than the reference voltage, output control instruction to the decision circuitry；
The input terminal of the decision circuitry is connected with the output end of the comparator, and the decision circuitry is described for judging
Whether the duration of control instruction is equal to preset duration, if being equal to or more than preset duration, determines that the control instruction is effective,
And judge whether the number of the effective control instruction received in preset time period is greater than preset times, if it is greater than or be equal to
The preset times then determine that the battery fills with electricity, if it is less than the preset times, determine that the battery does not fill
Full electricity.
Optionally, the decision circuitry is also used to send out when determining that the battery fills with electricity to the charging circuit
Open command is sent, stops charging to the battery to control the charging circuit.
Optionally, the decision circuitry includes time window timer, the first counter, the second counter and judgement electricity
Road；
The input terminal of the time window timer is connected with the output end of the comparator, for defeated in the comparator
Start timing after the control instruction out, and after timing duration reaches the preset time period, output first is instructed to described
Decision circuit；
The input terminal of first counter is connected with the output end of the comparator, for exporting institute in the comparator
After stating control instruction, judge whether the duration of the control instruction is equal to preset duration, it is defeated if being equal to or more than preset duration
It second instructs out to second counter；
The input terminal of second counter is connected with the output end of first counter, for receiving described
Count value is added 1 after two instructions, and count results are exported to the decision circuit；
The decision circuit is connected with the output end of the output end of the time window timer and second counter,
For judging whether the count results of second counter are greater than preset times after receiving first instruction, if
More than or equal to the preset times, then open command is sent to the charging circuit.
Optionally, the decision circuitry is also used to according to the adjustment instruction that receives, adjusts the preset duration, described pre-
If the value of period and the preset times.
A kind of electronic device, including battery and charging chip, the charging chip include charging circuit and battery full of inspection
Slowdown monitoring circuit；
The charging circuit is used to charge to the battery；
The battery full charge testing circuit is described in any item battery full charge testing circuits as above.
It optionally, further include master controller；
The master controller is connected with the decision circuitry of the battery full charge testing circuit, for according to the electronic device
Power consumption condition input adjustment instruction to the decision circuitry, to adjust the preset duration, the preset time period and described
The value of preset times.
A method of detection battery is full of, and is applied to described in any item battery full charge testing circuits as above, comprising:
Operational amplifier amplifies the voltage at first resistor both ends；
The amplified voltage of the operational amplifier is compared by comparator with reference voltage, and described amplified
When voltage is less than the reference voltage, control instruction is exported；
Decision circuitry judges whether the duration of the control instruction is equal to preset duration, if be equal to or more than default
It is long, then determine that the control instruction is effective, and judge the effective control instruction received in preset time period number whether
Then determine that the battery fills with electricity, if it is less than described if it is greater than or equal to the preset times greater than preset times
Preset times determine that the battery is not fully charged.
Optionally, after determining that the battery fills with electricity, further includes:
The decision circuitry sends open command to charging circuit, stops filling to the battery to control the charging circuit
Electricity.
Optionally, the decision circuitry includes time window timer, the first counter, the second counter and judgement electricity
Road, then decision circuitry judges whether the duration of the control instruction is equal to preset duration, and, judge to receive in preset time period
To the number of effective control instruction whether be greater than preset times, comprising:
The time window timer starts timing after the control instruction for receiving the comparator output, and in timing
After duration reaches the preset time period, the first instruction of output to the decision circuit；
First counter judges the control instruction after the control instruction for receiving the comparator output
Duration whether be equal to preset duration, if being equal to or more than preset duration, the second instruction of output is to second counter；
Count value is added 1 after receiving second instruction by second counter, and count results are exported to institute
State decision circuit；
The decision circuit judges whether the count results of second counter are big after receiving first instruction
Open command then is sent to the charging circuit if it is greater than or equal to the preset times in preset times.
Optionally, further includes:
The decision circuitry adjusts the preset duration, the preset time period and institute according to the adjustment instruction received
State the value of preset times.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
Method that battery full charge testing circuit provided by the present invention and its detection battery are full of, electronic device, due to the
One resistance is connected between battery and charging circuit, and therefore, the electric current in first resistor is equal to the charging current of battery.Pass through
Judge whether the voltage at first resistor both ends is less than reference voltage, that is, can determine whether the charging current of battery is less than cut-off threshold
Value, so as to carry out the whether fully charged judgement of battery when the voltage at first resistor both ends is less than reference voltage；
When the voltage at first resistor both ends is less than reference voltage, by judging whether the control instruction generated is effectively to control
System instructs and judges whether the number of the effective control instruction received in preset time period is greater than preset times, Ji Kezhun
Really judge whether battery fills with electricity, avoiding noise etc. causes to judge the fully charged problem of battery by accident.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the charging process schematic diagram of lithium ion electronics；
Fig. 2 is a kind of structural schematic diagram of battery full charge testing circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of decision circuitry provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of electronic device provided in an embodiment of the present invention；
Fig. 5 is a kind of flow chart of method that detection battery is full of provided in an embodiment of the present invention.
Specific embodiment
It is core of the invention thought above, to keep the above objects, features and advantages of the present invention more obvious easily
Understand, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of battery full charge testing circuits, applied to the electronic device with battery, the electricity
Sub-device can be smart phone, laptop, electric car and energy-accumulating power station etc..
As shown in Fig. 2, battery full charge testing circuit provided in an embodiment of the present invention, including first resistor 3, operational amplifier
4, comparator 5, decision circuitry 6 and second resistance 7.
Wherein, first resistor 3 is connected between battery 1 and the charging circuit 2 to charge to battery 1.It should be noted that
Battery 1 in the embodiment of the present invention can be lithium ion battery, be also possible to other rechargeable batteries, and the present invention is not limited in
This.Charging circuit 2 is used to receive supply current from charger, and is charged using supply current to battery 1.
The first input end of operational amplifier 4 is connected with the first end of first resistor 3, the second input of operational amplifier 4
End is connected with the second end of first resistor 3, and operational amplifier 4 is used to amplify the voltage at 3 both ends of first resistor, and will
Amplified voltage output is to comparator 5.
The first end of second resistance 7 is connected with the output end of operational amplifier 4, the second end ground connection of second resistance 7,
In, second resistance 7 is load resistance.
The first input end of comparator 5 is connected with the output end of operational amplifier 4, the second input terminal and ginseng of comparator 5
It examines voltage end Vref to be connected, comparator 5 is for amplified voltage to be compared with reference voltage, and voltage after amplification
When less than reference voltage, output control instruction to decision circuitry 6.
The input terminal of decision circuitry 6 is connected with the output end of comparator 5, decision circuitry 6 be used for judge control instruction when
It is long whether to be equal to preset duration, if being equal to or more than preset duration, determine that control instruction is effective, if it is less than it is default when
It is long, then determine that control instruction is invalid, and judge whether the number of the effective control instruction received in preset time period is greater than
Preset times then determine that battery 1 fills with electricity if it is greater than or equal to preset times, if it is less than preset times, determine electricity
Pond 1 is not fully charged.
On the basis of the above embodiments, the decision circuitry 6 in the embodiment of the present invention is also used to determining battery 1
When fully charged, open command is sent to charging circuit 2, stops charging to battery 1 to control charging circuit 2.It needs to illustrate
It is that charging circuit 2 includes switch, whether which charges to battery 1, that is to say, that when closing the switch
When, charging circuit 2 charges to battery 1, and when the switches are opened, charging circuit 2 no longer charges to battery 1.
On the basis of the above embodiments, the decision circuitry 6 in the embodiment of the present invention is also used to according to the adjustment received
Instruction adjusts preset duration, the value of preset time period and preset times, more accurately to carry out the fully charged judgement of battery 1.
For example, ining use, while charging when mobile phone frequently can lead to charging current and is unable to reach cutoff threshold cause
Charging can not stop, and can dynamically adjust preset duration, preset time period according to the power consumption condition of current phone in the present invention
With the value of preset times, avoid charging discontented or overshoot.
In the embodiment of the present invention, the charging process of battery 1 includes trickle charge stage, constant-current charging phase, constant-voltage charge
Stage and this four-stage of charging termination stage, also, in constant voltage charging phase when charging current slowly reduces, and are less than
When cutoff threshold, that is, trickle-charge current threshold value, since first resistor 3 is connected between battery 1 and charging circuit 2, the first electricity
Electric current in resistance 3 is equal to the charging current of battery 1, and therefore, the voltage at amplified 3 both ends of first resistor can be less than with reference to electricity
Pressure, at this point, comparator 5 can be flipped, and exports control instruction Iterm.
In practical charging process, charging current be not it is dull gradually reduce, since charging current is there are noise,
Therefore, charging current can rise and fall near cutoff threshold, cause the voltage at amplified 3 both ends of first resistor in reference voltage
It nearby rises and falls, comparator 5 is caused to overturn back and forth, repeatedly export control instruction Iterm.But only as control instruction Iterm
Duration be greater than preset duration when, control instruction Iterm is only effective instruction, and the charging current that could characterize battery 1 is less than
Cutoff threshold could characterize battery 1 and fill with electricity.
Pass through judgement electricity in the embodiment of the present invention to exclude to be unsatisfactory for the noise jamming of preset duration requirement based on this
Road judges whether the duration of control instruction Iterm is equal to preset duration, to judge whether control instruction Iterm is effectively to control
Instruction.And further judge whether the number of the effective control instruction Iterm received in preset time period is greater than default time
Number, comes whether accurate judgement battery 1 fills with electricity.
In one particular embodiment of the present invention, decision circuitry 6 is when first control instruction Iterm arrives, starting
Time window timing, meanwhile, judge whether control instruction Iterm is effective control instruction, if control instruction Iterm is held
Continuous length is immediately long to be greater than preset duration L, then control instruction Iterm is effective, and control instruction Iterm statistics number adds 1；If
The duration of control instruction Iterm is less than preset duration L, then control instruction Iterm is invalid control instruction, control instruction
The statistics number of Item is constant.
Before time window timer reaches preset time T, if time of the effective control instruction Iterm counted on
Number reaches preset times N, then, decision circuitry 6 determines that battery 1 fills with electricity, and decision circuitry 6 sends disconnected to charging circuit 2
Instruction is opened, control charging circuit 2 stops charging to battery 1.If being counted on when time window timer reaches preset time T
The number of effective control instruction Iterm do not reach preset times N, then, this time statistics is invalid, and time window will close, control
The statistics number of system instruction Iterm will also be reset.When new control instruction Iterm is reached, time window timing and effectively control
System instruction Iterm counting will restart.
In one embodiment of the invention, as shown in figure 3, decision circuitry 6 is counted including time window timer 60, first
Number device 61, the second counter 62 and decision circuit 63；
The input terminal of time window timer 60 is connected with the output end of comparator 5, controls for exporting in comparator 5
Start timing after instruction, and after timing duration reaches preset time period, the first instruction of output to decision circuit 63；
The input terminal of first counter 61 is connected with the output end of comparator 5, for exporting control instruction in comparator 5
Afterwards, judge whether the duration of control instruction is equal to preset duration, if being equal to or more than preset duration, the second instruction of output to the
Two counters 62；
The input terminal of second counter 62 is connected with the output end of the first counter 61, for after receiving the second instruction
It exports by count value plus 1, and by count results to decision circuit 63；
Decision circuit 63 is connected with the output end of the output end of time window timer 60 and the second counter 62, is used for
After receiving the first instruction, judge whether the count results of the second counter 62 are greater than preset times, if it is greater than or equal in advance
If number, then open command is sent to charging circuit 2.
Certainly, the present invention is not limited to this, and in other embodiments, decision circuitry 6 can also pass through other logic devices
Part realizes above-mentioned function.
The embodiment of the invention also provides a kind of electronic device, the electronic device can be smart phone, laptop,
Electric car and energy-accumulating power station etc., as shown in figure 4, the electronic device includes battery 1 and charging chip, the charging chip packet
The battery full charge testing circuit of charging circuit 2 and any embodiment as above offer is provided.Wherein, charging circuit 2 is to charge to battery 1
Circuit.
Electronic device in the embodiment of the present invention includes master controller 8, which is the CPU of electronic device
(Central Processing Unit/Processor, central processing unit).The master controller 8 and battery full charge testing circuit
Decision circuitry 6 be connected, it is default to adjust for inputting adjustment instruction to decision circuitry 6 according to the power consumption condition of electronic device
The value of duration, preset time period and preset times.
That is, master controller 8 generates adjustment instruction according to the power consumption condition of electronic device, and adjustment instruction is sent
To decision circuitry 6, after decision circuitry 6 receives adjustment instruction, preset duration, the value of preset time period and preset times are adjusted.
Specifically, preset duration, preset time period and preset times can be reduced when the power consumption of electronic device is big
Value increases preset duration, the value of preset time period and preset times in the power consumption hour of electronic device.
The embodiment of the invention also provides a kind of methods that detection battery is full of, and provide applied to any embodiment as above
Battery full charge testing circuit, as shown in Figure 5, comprising:
S1: operational amplifier amplifies the voltage at first resistor both ends；
S2: the amplified voltage of the operational amplifier is compared by comparator with reference voltage, and in the amplification
When voltage afterwards is less than the reference voltage, control instruction is exported；
S3: decision circuitry judges whether the duration of the control instruction is equal to preset duration, if be equal to or more than default
Duration then enters S4；
S4: determining that the control instruction is effective, and enters S5；
S5: decision circuitry judges whether the number of the effective control instruction received in preset time period is greater than default time
Number then enters S6 if it is greater than or equal to preset times, if it is less than preset times, then enters S7；
S6: determine that the battery fills with electricity；
S7: determine that the battery is not fully charged.
In order to exclude to be unsatisfactory for the noise jamming of preset duration requirement, judge to control by decision circuitry in the embodiment of the present invention
Whether the duration of system instruction is equal to preset duration, to judge whether control instruction is effective control instruction.And further judgement is pre-
If whether the number of the effective control instruction received in the period is greater than preset times, whether to carry out accurate judgement battery
It is fully charged.
In the embodiment of the present invention, after determining that battery fills with electricity, the method also includes:
Decision circuitry sends open command to charging circuit, stops charging to battery to control charging circuit.
In the embodiment of the present invention, when decision circuitry includes time window timer, the first counter, the second counter and is sentenced
Certainly when circuit, decision circuitry judges whether the duration of the control instruction is equal to preset duration, and, judge in preset time period
Whether the number of the effective control instruction received is greater than preset times, comprising:
Time window timer starts timing after the control instruction for receiving the comparator output, and in timing duration
After reaching the preset time period, the first instruction of output to the decision circuit；
First counter after the control instruction for receiving comparator output, judge the control instruction when
It is long whether to be equal to preset duration, if being equal to or more than preset duration, output the second instruction to the second counter；
Count value is added 1 after receiving second instruction by second counter, and count results are exported to sentencing
Certainly circuit；
The decision circuit judges whether the count results of second counter are big after receiving first instruction
Open command then is sent to the charging circuit if it is greater than or equal to the preset times in preset times.
In the embodiment of the present invention, the method also includes:
Decision circuitry adjusts preset duration, the value of preset time period and preset times according to the adjustment instruction received.
For example, ining use, while charging when mobile phone frequently can lead to charging current and is unable to reach cutoff threshold cause
Charging can not stop, and can dynamically adjust preset duration, preset time period according to the power consumption condition of current phone in the present invention
With the value of preset times, avoid charging discontented or overshoot.
Specifically, it can reduce preset duration, preset time period when the power consumption of electronic device such as mobile phone is big and preset
The value of number increases preset duration, the value of preset time period and preset times in the power consumption hour of electronic device.
Method that battery full charge testing circuit provided by the present invention and its detection battery are full of, electronic device, due to the
One resistance is connected between battery and charging circuit, and therefore, the electric current in first resistor is equal to the charging current of battery.Pass through
Judge whether the voltage at first resistor both ends is less than reference voltage, that is, can determine whether the charging current of battery is less than cut-off threshold
Value, so as to be less than reference voltage in the voltage at first resistor both ends, when, carry out the whether fully charged judgement of battery；
When the voltage at first resistor both ends is less than reference voltage, by judging whether the control instruction generated is effectively to control
System instructs and judges whether the number of the effective control instruction received in preset time period is greater than preset times, Ji Kezhun
Really judge whether battery fills with electricity, avoiding noise etc. causes to judge the fully charged problem of battery by accident.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of battery full charge testing circuit, which is characterized in that including first resistor, operational amplifier, comparator, second resistance
And decision circuitry；
The first resistor is connected between battery and the charging circuit to charge to the battery；
The first input end of the operational amplifier is connected with the first end of the first resistor, and the second of the operational amplifier
Input terminal is connected with the second end of the first resistor, the operational amplifier be used for the voltage at the first resistor both ends into
Row amplification, and by amplified voltage output to the comparator；
The first end of the second resistance is connected with the output end of the operational amplifier, the second termination of the second resistance
Ground；
The first input end of the comparator is connected with the output end of the operational amplifier, the second input terminal of the comparator
It is connected with reference voltage end, the comparator is used to for the amplified voltage being compared with reference voltage, and described
When amplified voltage is less than the reference voltage, output control instruction to the decision circuitry；
The input terminal of the decision circuitry is connected with the output end of the comparator, and the decision circuitry is for judging the control
Whether the duration of instruction is equal to preset duration, if being equal to or more than preset duration, determines that the control instruction is effective, and sentence
Whether the number of the effective control instruction received in disconnected preset time period is greater than preset times, if it is greater than or be equal to described
Preset times then determine that the battery fills with electricity, if it is less than the preset times, determine the battery and underfill
Electricity.
2. detection circuit according to claim 1, which is characterized in that the decision circuitry is also used to determining the battery
When filling with electricity, open command is sent to the charging circuit, stops charging to the battery to control the charging circuit.
3. detection circuit according to claim 2, which is characterized in that the decision circuitry include time window timer,
First counter, the second counter and decision circuit；
The input terminal of the time window timer is connected with the output end of the comparator, for exporting institute in the comparator
Start timing after stating control instruction, and after timing duration reaches the preset time period, the first instruction of output to the judgement
Circuit；
The input terminal of first counter is connected with the output end of the comparator, for exporting the control in the comparator
After system instruction, judge whether the duration of the control instruction is equal to preset duration, if being equal to or more than preset duration, output the
Two instruct to second counter；
The input terminal of second counter is connected with the output end of first counter, for receiving second finger
Count value is added 1 after order, and count results are exported to the decision circuit；
The decision circuit is connected with the output end of the output end of the time window timer and second counter, is used for
After receiving first instruction, judge whether the count results of second counter are greater than preset times, if it is greater than
Or be equal to the preset times, then open command is sent to the charging circuit.
4. detection circuit according to claim 1, which is characterized in that the decision circuitry is also used to according to the tune received
Whole instruction adjusts the value of the preset duration, the preset time period and the preset times.
5. a kind of electronic device, which is characterized in that including battery and charging chip, the charging chip includes charging circuit and electricity
Pond is full of detection circuit；
The charging circuit is used to charge to the battery；
The battery full charge testing circuit is the described in any item battery full charge testing circuits of Claims 1 to 4.
6. electronic device according to claim 5, which is characterized in that further include master controller；
The master controller is connected with the decision circuitry of the battery full charge testing circuit, for the consumption according to the electronic device
Electric situation inputs adjustment instruction to the decision circuitry, to adjust the preset duration, the preset time period and described default
The value of number.
7. a kind of method that detection battery is full of, which is characterized in that filled applied to the described in any item batteries of Claims 1 to 4
Full detection circuit, comprising:
Operational amplifier amplifies the voltage at first resistor both ends；
The amplified voltage of the operational amplifier is compared by comparator with reference voltage, and in the amplified voltage
When less than the reference voltage, control instruction is exported；
Decision circuitry judges whether the duration of the control instruction is equal to preset duration, if being equal to or more than preset duration,
Determine that the control instruction is effective, and it is pre- to judge whether the number of the effective control instruction received in preset time period is greater than
If number, if it is greater than or equal to the preset times, then determine that the battery fills with electricity, if it is less than described default time
Number, determines that the battery is not fully charged.
8. the method according to the description of claim 7 is characterized in that after determining that the battery fills with electricity, further includes:
The decision circuitry sends open command to charging circuit, stops charging to the battery to control the charging circuit.
9. according to the method described in claim 8, it is characterized in that, the decision circuitry includes time window timer, first
Counter, the second counter and decision circuit, then decision circuitry judges whether the duration of the control instruction is equal to preset duration,
And judge whether the number of the effective control instruction received in preset time period is greater than preset times, comprising:
The time window timer starts timing after the control instruction for receiving the comparator output, and in timing duration
After reaching the preset time period, the first instruction of output to the decision circuit；
First counter after the control instruction for receiving comparator output, judge the control instruction when
It is long whether to be equal to preset duration, if being equal to or more than preset duration, the second instruction of output to second counter；
Count value is added 1 after receiving second instruction by second counter, and count results are exported to described and are sentenced
Certainly circuit；
It is pre- to judge whether the count results of second counter are greater than after receiving first instruction for the decision circuit
If number, if it is greater than or equal to the preset times, then open command is sent to the charging circuit.
10. the method according to the description of claim 7 is characterized in that further include:
The decision circuitry adjusts the preset duration, the preset time period and described pre- according to the adjustment instruction received
If the value of number.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345257.5A CN109212423B (en) | 2018-11-13 | 2018-11-13 | Battery full detection circuit, method for detecting battery full and electronic device |
| PCT/CN2019/117469 WO2020098634A1 (en) | 2018-11-13 | 2019-11-12 | Circuit for detecting full charge of battery and method for detecting full charge of battery, and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345257.5A CN109212423B (en) | 2018-11-13 | 2018-11-13 | Battery full detection circuit, method for detecting battery full and electronic device |
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| CN109212423A true CN109212423A (en) | 2019-01-15 |
| CN109212423B CN109212423B (en) | 2024-03-01 |
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Cited By (1)
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| WO2020098634A1 (en) * | 2018-11-13 | 2020-05-22 | 上海艾为电子技术股份有限公司 | Circuit for detecting full charge of battery and method for detecting full charge of battery, and electronic device |
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