CN106532865A - Battery charging circuit and charging method - Google Patents
Battery charging circuit and charging method Download PDFInfo
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- CN106532865A CN106532865A CN201611243610.XA CN201611243610A CN106532865A CN 106532865 A CN106532865 A CN 106532865A CN 201611243610 A CN201611243610 A CN 201611243610A CN 106532865 A CN106532865 A CN 106532865A
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- 238000007600 charging Methods 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000005070 sampling Methods 0.000 claims abstract description 62
- 239000004065 semiconductor Substances 0.000 claims description 57
- 238000001514 detection method Methods 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 20
- 238000010278 pulse charging Methods 0.000 claims description 14
- 238000010280 constant potential charging Methods 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H02J7/0086—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention provides a battery charging circuit and a battery charging method. The battery charging method provided by the embodiment of the invention comprises the following steps: a processing unit detects a voltage difference between the first end and the second end of a sampling resistor; the processing unit determines whether a battery is in a charging state according to the voltage difference; and if the battery is in the charging state, the processing unit determines a charging mode for charging the battery according to a charging current input by a power pin, wherein the charging mode comprises a rapid charging mode and a general charging mode. According to the technical scheme of the circuit and the method provided by the invention, whether charging equipment that currently charges the battery is the charging equipment matched with the battery is determined according to the size of the charging current input by the power pin, so that the battery charging mode is determined, and thus security of the battery is improved and a service life of the battery is ensured.
Description
Technical field
The present invention relates to cell art, more particularly to a kind of battery charger and charging method.
Background technology
With the continuous lifting of modern science and technology technology, people for the dependency degree more and more higher of terminal, as carrying for terminal
For the battery of electric energy, its how to strengthen endurance with and improve charging rate the problems such as be increasingly taken seriously.
For the charging of battery, in order to ensure the service life of battery, a kind of battery pair of model under normal circumstances
Answer a kind of charging equipment of charging equipment of model, every kind of model that there is fixed charging voltage and charging current.Due to different
The interface of the charging equipment of model is most of consistent, therefore battery of the user in using charging equipment for electronic equipment is filled
When electric, the easy matching error of charging equipment model.
Therefore, when the battery size in charging equipment model with electronic equipment is mismatched, battery is easily caused pole occur
Change phenomenon, this will cause great security risk to lithium battery, and promote battery capacity to decay rapidly, reduce the use longevity of battery
Life.
The content of the invention
The embodiment of the present invention provides a kind of battery charger and charging method, realizes raising battery security and ensures
The service life effect of battery.
The embodiment of the present invention provides a kind of battery charger, including：
Power pins；
Battery；
Switch element；
Processing unit；
Sampling unit；
The positive pole of the battery is connected with the positive pole of the power pins；
The negative pole of the battery is connected with the first end of the sampling unit, the second end and the electricity of the sampling unit
The negative pole connection of source pin；
The processing unit is connected with the switch element；
The processing unit is connected with the sampling unit；
The switch element is connected with the positive pole of the battery.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation,
The switch element includes：
First Metal-oxide-semicondutor metal-oxide-semiconductor；
Second metal-oxide-semiconductor；
The sampling unit is sampling resistor；
The processing unit includes：First voltage output pin, second voltage output pin, first voltage detection pin,
Second voltage detects pin；
The positive pole of battery positive pole respectively with the power pins, the drain electrode of second metal-oxide-semiconductor are connected, the electricity
The negative pole in pond is connected with the second end of the sampling resistor；
The grid of first metal-oxide-semiconductor is connected with the first voltage output pin, the source electrode of first metal-oxide-semiconductor and institute
The negative pole connection of power pins is stated, the drain electrode of first metal-oxide-semiconductor is connected with the first end of the sampling resistor；
The first end of the sampling resistor and the first voltage detection pin be connected, the second end of the sampling resistor and
The second voltage detection pin connection；
The grid of second metal-oxide-semiconductor is connected with the second voltage output pin, and the source electrode of second metal-oxide-semiconductor connects
Ground.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, also include：
Detection resistance；
The processing unit also includes：Power pins voltage pin；
The first end of the detection resistance is connected with the power pins voltage pin, the second end of the detection resistance with
The positive pole connection of the battery.
The embodiment of the present invention also provides a kind of method for charging batteries, is applied to above-mentioned battery charger, including：
Processing unit detects the voltage difference between sampling resistor first end and the second end；
Whether the processing unit determines battery in charged state according to the voltage difference；
If the battery is in charged state, the charging current that the processing unit is input into according to power pins is defined as
The charging modes that the battery charges, the charging modes include quick charge mode and normal charge mode.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the power supply are drawn
The charging current of pin input is equal with the size of current for flowing through the sampling resistor, and the electric current for flowing through the sampling resistor is
The ratio of the voltage difference and the sampling resistor resistance.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the process list
According to the voltage, unit determines whether battery is in charged state, including：
The processing unit determines the sense of current for flowing through the sampling resistor according to the electric differential pressure；
If the sense of current is the inflow battery, it is determined that the battery is in charged state；
If the sense of current is the outflow battery, it is determined that the battery is in discharge condition.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, if the battery
In charged state, according to the charging current of power pins input, it is defined as the charging modes that the battery charges, the charging
Mode includes quick charge mode and normal charge mode, including：
If the battery is in the relation of charged state, the comparison charging current and the first current threshold；
If the charging current is more than or equal to first current threshold, the use of quick charge mode is the battery
Charge；
If the charging current is less than first current threshold, charged for the battery using normal charge mode.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, methods described is also
Including：
After being battery charging using the quick charge mode, if the charging current is less than second current threshold
Value, stops using the quick charge mode to be charged for the battery, and second current threshold is electric less than described first
Stream threshold value；
It is charged for the battery using the normal charge mode.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, it is described quickly to fill
It is electrically pulse charging manner；
Charged for the battery using quick charge mode, including：
The processing unit periodic intervals turn on the grid of the grid and the second metal-oxide-semiconductor of the first metal-oxide-semiconductor, so that first
The drain electrode of metal-oxide-semiconductor and the drain electrode of the second metal-oxide-semiconductor alternately export pulse charging current.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, the routine are filled
It is electrically constant voltage charging method；
It is charged for the battery using the normal charge mode, including：
The processing unit turns on the grid of the first metal-oxide-semiconductor and is not turned on the second metal-oxide-semiconductor, the use of constant voltage is the electricity
Pond is charged.
Aspect as above and arbitrary possible implementation, it is further provided a kind of implementation, methods described is also
Including：
If the battery is in charged state, and the charging current is more than the 3rd current threshold, stops as the battery
Charge.
Battery charger provided in an embodiment of the present invention and charging method, detect sampling resistor first by processing unit
Voltage difference between end and the second end when battery is in charged state, processes single determining battery whether in charged state
Unit is determined using quick charge mode or using normal charge mode come for electricity according to the charging current of power pins input
Pond is charged, therefore, in the inventive solutions, can be according to the size of the charging current of power pins input come really
Whether the charging equipment charged for battery before settled is the charging equipment matched with battery, and then is defined as the side of battery charging
Formula, so as to improve the security of battery and having ensured the service life of battery, solves in prior art, when charging equipment type
Number with electronic equipment in battery size mismatch when, easily cause battery polarization phenomena occur, this will cause pole to lithium battery
Big security risk, and promote battery capacity to decay rapidly, reduce the problem of the service life of battery.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are these
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the first structure schematic diagram of the embodiment of battery charger provided in an embodiment of the present invention；
Fig. 2 is the second structural representation of the embodiment of battery charger provided in an embodiment of the present invention；
Fig. 3 is the 3rd structural representation of the embodiment of battery charger provided in an embodiment of the present invention；
Fig. 4 is the flow chart of method for charging batteries embodiment provided in an embodiment of the present invention；
Fig. 5 is the flow chart of method for charging batteries embodiment provided in an embodiment of the present invention two；
Electric current and time chart of the Fig. 6 for method for charging batteries embodiment provided in an embodiment of the present invention two；
Fig. 7 is the flow chart of method for charging batteries embodiment provided in an embodiment of the present invention three；
Fig. 8 is the flow chart of method for charging batteries example IV provided in an embodiment of the present invention.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The term for using in embodiments of the present invention is the purpose only merely for description specific embodiment, and is not intended to be limiting
The present invention." one kind ", " described " and " being somebody's turn to do " of singulative used in the embodiment of the present invention and appended claims
It is also intended to include most forms, unless context clearly shows that other implications.
Embodiment one
Fig. 1 is the first structure schematic diagram of the embodiment of battery charger provided in an embodiment of the present invention, such as Fig. 1 institutes
Show that the battery charger of the embodiment of the present invention can include：Power pins, battery, switch element, processing unit, sampling are single
Unit.
As shown in figure 1, power pins include the negative pole P- of the positive pole P+ and power pins of power pins, power pins are used for
Electric energy is provided for battery when battery needs and charges, in embodiments of the present invention, the positive pole P+'s and power pins of power pins
Negative pole P- can be used to indicate that the contact of connection external charging equipment.
Wherein, battery is the energy storage device for charge or discharge, and the positive pole of battery is connected with the positive pole of power pins, is adopted
Sample unit is used for the state of the charge or discharge for determining battery, and the negative pole of battery is connected with the first end of sampling unit, and sampling is single
Second end of unit is connected with the negative pole of power pins.Processing unit is connected with sampling unit, and processing unit is connected with switch element,
Allow processing unit according to the state of the data and battery of sampling unit, instruct to switch element transmission, and by opening
The control of unit is closed, the charging modes of battery charging are replaced by, switch element is additionally operable to beginning and the stopping for controlling to charge, because
This, switch element is connected with the positive pole of battery.
Fig. 2 is the second structural representation of the embodiment of battery charger provided in an embodiment of the present invention, such as Fig. 2 institutes
Show, the battery charger of the embodiment of the present invention, switch element can include：First MOS (Metal-Oxide-
Semiconductor, Metal-oxide-semicondutor) pipe Q1, the second metal-oxide-semiconductor Q2, sampling unit are sampling resistor R1。
As shown in Fig. 2 processing unit U includes first voltage output pin P1, second voltage output pin P2, first electric
Pressure detection pin P3, second voltage detection pin P4.In embodiments of the present invention, coded program is built-in with processing unit U, its
Can be defined according to the battery of different model, for example, the magnitude of voltage of first voltage output pin P1 outputs, second voltage
The magnitude of voltage of output pin P2 outputs, first voltage output pin P1 output durations, second voltage output pin P2 outputs
Duration, voltage threshold, current threshold etc..
As shown in Fig. 2 battery include positive pole+and negative pole-, the first metal-oxide-semiconductor Q1 includes grid, source electrode and drain electrode, the 2nd MOS
Pipe Q2 includes grid, source electrode and drain electrode, sampling resistor R1Including first end and the second end.Wherein, the positive pole of battery+draw with power supply
The positive pole P+ connections of pin, the positive pole of battery is connected with the drain electrode of the second metal-oxide-semiconductor Q2, the negative pole-of battery and sampling resistor R1
Two ends connect, and the grid of the first metal-oxide-semiconductor Q1 is connected with first voltage output pin P1, and the source electrode of the first metal-oxide-semiconductor Q1 is drawn with power supply
The negative pole P- connections of pin, drain electrode and the sampling resistor R of the first metal-oxide-semiconductor Q11First end connection, sampling resistor R1First end with
First voltage detection pin P3 connections, sampling resistor R1The second end and second voltage detection pin P4 be connected, the second metal-oxide-semiconductor Q2
Grid be connected with second voltage output pin P2, the source ground of the second metal-oxide-semiconductor Q2.
Fig. 3 is another structural representation of the embodiment of battery charger provided in an embodiment of the present invention, such as Fig. 2 institutes
Show, the battery charger of the embodiment of the present invention can also include on the basis of Fig. 1：Detection resistance R2.Detection resistance R2Can
For detecting the voltage of battery, therefore, processing unit U is also needed to power pins voltage pin VCC so that detection resistance
R2First end be connected with power pins voltage pin VCC, detection resistance R2The second end and battery positive pole+be connected.
It should be noted that the battery charger provided in the embodiment of the present invention, can apply in battery charger, electricity
In tank adapter, battery control circuit or chip.
It should be noted that the battery provided in the embodiment of the present invention can include but is not limited to personal computer
(Personal Computer, PC), personal digital assistant (Personal Digital Assistant, PDA), wireless handheld
Electricity used in equipment, wearable device, panel computer (Tablet Computer), mobile phone, MP3 player, MP4 players
Pond.
Battery charger provided in an embodiment of the present invention, detects sampling resistor R by processing unit U1First end and the
Voltage difference between two ends determining battery whether in charged state, when battery is in charged state, processing unit U according to
The charging current of power pins input is carried out for battery to determine using quick charge mode or using normal charge mode
Charge, therefore, in the inventive solutions, can be determined according to the size of the charging current of power pins input current
It is whether charging equipment match with battery for the charging equipment that battery charges, and then is defined as the mode that battery charges, so as to
The security that improve battery and the service life for having ensured battery, solve in prior art, when charging equipment model and electricity
When battery size in sub- equipment is mismatched, battery is easily caused polarization phenomena occur, this will cause greatly peace to lithium battery
Full blast danger, and promote battery capacity to decay rapidly, reduce the problem of the service life of battery.
The operation principle of above-mentioned battery charger is as follows：
Detect that pin P3 detects the sampling resistor R that pin P4 is collected with second voltage according to first voltage1Voltage difference
To determine the trend of electric current in circuit, and in circuit electric current size, and then determine that battery is in charged state or puts
Electricity condition.When battery is in charged state, if the charging current in circuit is more than or equal to the first current threshold, it is determined that
Can be to adopt quick charge mode to be charged as battery.Quick charge mode can be pulse charging manner, by periodically
Interval the first metal-oxide-semiconductor Q1 of conducting and the second metal-oxide-semiconductor Q2 forms pulse charging current, specifically, by first voltage output pin
The voltage that the first metal-oxide-semiconductor Q1 can be turned on of P1 outputs so that the source electrode of the first metal-oxide-semiconductor Q1 and drain electrode conducting, forms positive arteries and veins
Charging current is rushed, the voltage that can turn on the second metal-oxide-semiconductor Q2 for then exporting by second voltage output pin P2 so that second
The source electrode of metal-oxide-semiconductor Q2 and drain electrode conducting, form negative-going pulse charging current.If the charging current in circuit is less than the first current threshold
Value, it is determined that can to adopt normal charge mode to be charged as battery, normal charge mode can be constant voltage charging method or
Person's constant-current charge mode or first constant-current charge constant voltage charging method again.Normal charge mode, it is specifically, defeated by first voltage
Go out the voltage that can turn on the first metal-oxide-semiconductor Q1 of pin P1 outputs so that the first metal-oxide-semiconductor Q1 constant conductions.When stopping is needed it is
When battery charges, the first metal-oxide-semiconductor Q1 of conducting is closed.
Embodiment two
Fig. 4 is the flow chart of method for charging batteries embodiment provided in an embodiment of the present invention, as shown in figure 4, of the invention
Method for charging batteries in embodiment, can apply in the battery charger in embodiment one, can specifically include as follows
Step：
201st, the voltage difference between processing unit detection sampling resistor first end and the second end.
In embodiments of the present invention, processing unit includes first voltage detection pin P3, second voltage detection pin P4, its
In, first voltage detection pin P3 connection sampling resistor R1First end, second voltage detection pin P4 connection sampling resistor R1's
Second end, as sampling resistor R1In when having electric current to pass through, sampling resistor R1Itself can produce voltage difference, and which can be electric by first
With second voltage, pressure detection pin P3 detects that the magnitude of voltage that pin P4 is detected is calculated, for example, U (R1)=U (P3)-U
(P4)。
202nd, whether processing unit determines battery in charged state according to voltage difference.
As electric current has directionality, when current direction battery, it can be understood as just using outside power pins be
Battery charges, when electric current flows out battery, it can be understood as battery discharges.Therefore, in embodiments of the present invention, process single
Unit determines the sense of current for flowing through sampling resistor according to electric differential pressure.Specifically, if sense of current is inflow battery, it is determined that
Battery is in charged state, if sense of current is outflow battery, it is determined that battery is in discharge condition.
It should be noted that the power pins of outside can be any one charging equipment, and for example, charger, mobile electricity
Source pin etc..
For example, first voltage detection pin P3 detects magnitude of voltage for 3V, the electricity that second voltage detection pin P4 is detected
Pressure value is 2.5V, U (R1)=U (P3)-U (P4)=0.5V, then may determine that sense of current to flow into battery, and processing unit is true
Battery is determined in charged state.
If the 203, battery is in charged state, the charging current that processing unit is input into according to power pins is defined as battery
The charging modes of charging, charging modes include quick charge mode and normal charge mode.
In embodiments of the present invention, when it is that battery charges to connect external power source pin, electric current can flow through sampling resistor R1,
Due to the internal resistance of sampling resistor it is less, it can be understood as power pins input charging current it is big with the electric current for flowing through sampling resistor
It is little equal, therefore, the electric current for flowing through sampling resistor can be obtained by calculating, and specifically, the electric current for flowing through sampling resistor is electricity
Charging current I of the ratio of pressure reduction and sampling resistor resistance, i.e. power pins input, I=U (R1)/R1。
For example, U (R1)=2.8V, R1=1 Ω, then charging current I=2.8/1=2.8A that power pins are input into.
Due to the battery of different model, the battery core composition material of its battery can be different, the capacity of corresponding battery, battery
Charging rate can be different.Therefore, a kind of charging modes for being adapted to the size battery of battery correspondence of every kind of model, are ensureing
While the security of battery, the charging rate of battery can also be lifted.Filling for charging equipment input can be embodied in accordingly
The data such as the size of electric current, the size of charging voltage.
Therefore in embodiments of the present invention, the charging current of power pins input can be detected by processing unit,
And be compared by the charging current pre-set in processing unit, and battery charging is defined as according to corresponding comparative result
Charging modes.During a concrete implementation, charging modes include quick charge mode and normal charge mode.Can be with
It is understood by, quick charge mode charging rate is very fast, and the charging current for using accordingly is larger, and normal charge mode charges
Speed is slower, and the charging current for using accordingly is less.
Wherein, quick charge mode can include the modes such as high-power quick charge mode, pulse charging manner, routinely fill
Constant-voltage charge, constant-current charge, the first constant-current charge mode such as constant-voltage charge again can electrically be included.
It should be noted that high-power quick charge mode, the power of its output is more than 10W.
It should be noted that in embodiments of the present invention, pulse charging manner can include at least two charging processes not
Same charging modes, for example, charging current is different, or discharge current is different, or charging duration is not equal.
When the charging current of power pins input is identical with the charging current pre-set in processing unit, it is believed that
The current charging equipment charged for battery is the charging equipment matched with battery, and the use of the charging modes for being adapted to battery is electricity
Pond is charged, for example, quick charge mode.When the charging electricity pre-set in the charging current and processing unit of power pins input
When stream is differed, it is believed that the current charging equipment charged for battery is and the unmatched charging equipment of battery to need to use
Other charging modes charge for battery, for example, normal charge mode.
Method for charging batteries provided in an embodiment of the present invention, detects sampling resistor first end and the second end by processing unit
Between voltage difference determining battery whether in charged state, when battery is in charged state, processing unit is according to power supply
The charging current of pin input is charged for battery to determine using quick charge mode or using normal charge mode,
Therefore, in the inventive solutions, can be determined according to the size of the charging current of power pins input current for electricity
Whether the charging equipment that pond is charged is the charging equipment matched with battery, and then is defined as the mode of battery charging, so as to improve
The security of battery and the service life for having ensured battery, solve in prior art, when charging equipment model and electronics set
When battery size in standby is mismatched, battery is easily caused polarization phenomena occur, this will cause great safety wind to lithium battery
Danger, and promote battery capacity to decay rapidly, reduce the problem of the service life of battery.
Embodiment three
Fig. 5 is the flow chart of method for charging batteries embodiment provided in an embodiment of the present invention two, as shown in figure 5, of the invention
Method for charging batteries in embodiment, can apply in the battery charger in embodiment one, can specifically include as follows
Step：
301st, the voltage difference between processing unit detection sampling resistor first end and the second end.
302nd, whether processing unit determines battery in charged state according to voltage difference.
If the 303, battery is in charged state, compare the relation of charging current and the first current threshold, if charging current is big
In or be equal to the first current threshold, execution step 304, if charging current be less than the first current threshold, execution step 305.
For example, the first current threshold is 3.5A, and when charging current is 3.0A, charging current is less than the first current threshold,
Charged for battery using normal charge mode.
Again for example, the first current threshold is 3.5A, and when charging current is 3.6A, charging current is more than the first current threshold
Value, is charged for battery using quick charge mode.
304th, charged for battery using quick charge mode.
During a concrete implementation, quick charge mode is pulse charging manner.Used in pulse charging manner
Pulse charging current include charging current and discharge current, by charging current and discharge current is periodically used alternatingly be
Battery is charged.Wherein, charging current can use larger electric current, using discharge current alleviating after charging current
Due to using the brought polarization phenomena of larger electric current charging, it is thereby achieved that accelerating the effect of charging rate.
In embodiments of the present invention, battery charger in conjunction with the embodiments in understands, processing unit periodic intervals
The grid of the grid and the second metal-oxide-semiconductor of the first metal-oxide-semiconductor is turned on, so that the drain electrode of the first metal-oxide-semiconductor and the drain electrode of the second metal-oxide-semiconductor replace
Output pulse charging current.Specifically, charging current is formed when processing unit turns on the grid of the first metal-oxide-semiconductor, it is single when processing
Discharge current is formed during the grid of unit's the second metal-oxide-semiconductor of conducting.The time for turning on the grid of the first metal-oxide-semiconductor can be entered by processing unit
Row control, the time for turning on the grid of the second metal-oxide-semiconductor can also be controlled by processing unit, its pulse charging current for being formed
Can be illustrated by Fig. 5.Electric current and time of the Fig. 6 for method for charging batteries embodiment provided in an embodiment of the present invention two
Graph of a relation, as shown in fig. 6, the charging current that the grid of the first metal-oxide-semiconductor of conducting is formed is positive charge electric current, turns on the 2nd MOS
The discharge current that the grid of pipe is formed is negative sense discharge current.
305th, charged for battery using normal charge mode.
During a concrete implementation, normal charge mode can include constant voltage charging method and ladder charging side
Formula.Constant voltage charging method is to be charged for battery using constant voltage, and ladder charging modes are using different constant voltages
It is charged for battery according to specified order.In embodiments of the present invention, the battery charger in conjunction with the embodiments in can
Know, processing unit turns on the grid of the first metal-oxide-semiconductor and is not turned on the second metal-oxide-semiconductor so that be only continuously using positive charge electric current
Battery is charged.
Method for charging batteries provided in an embodiment of the present invention, detects sampling resistor first end and the second end by processing unit
Between voltage difference determining battery whether in charged state, when battery is in charged state, processing unit is according to power supply
The charging current of pin input is compared with the first current threshold, determined according to comparative result using quick charge mode or
Person is charged for battery using normal charge mode, therefore, in the inventive solutions, can be according to power pins
The size of the charging current of input come whether determine the current charging equipment charged for battery be the charging equipment that matches with battery,
And then it is defined as the mode that battery charges, so as to improve the security of battery and having ensured the service life of battery, solve
In prior art, when the battery size in charging equipment model with electronic equipment is mismatched, battery is easily caused polarization occur
Phenomenon, this will cause great security risk to lithium battery, and promote battery capacity to decay rapidly, reduce the service life of battery
Problem.
Example IV
Fig. 7 is the flow chart of method for charging batteries embodiment provided in an embodiment of the present invention three, as shown in fig. 7, of the invention
Method for charging batteries in embodiment, can apply to the step in the battery charger in embodiment one, in embodiment three
After rapid 304, can also comprise the steps：
404th, compare the relation of charging current and the second current threshold, if charging current is less than the second current threshold, perform
Step 407, if charging current is more than or equal to the second current threshold, execution step 304.
As the carrying out charged, the voltage of battery constantly raise, in embodiments of the present invention, the voltage of battery can lead to
The processing unit crossed in battery charger is detected.Specifically, the power pins voltage pin connection inspection in processing unit
The first end of measuring resistance, the second end of detection resistance connect the positive pole of battery, the electricity collected by power pins voltage pin
Pressure value is determining the current voltage of battery.
When the voltage of battery is increased to blanking voltage, the electricity in battery already close to rated capacity, in order to prevent
Degree charges and damages battery, needs to stop using quick charge mode to be converted to using normal charge side for battery is charged
Formula continues as battery and is charged.And when the voltage of battery is increased to blanking voltage, charging current will be gradually reduced, therefore,
By the relation for comparing charging current and the second current threshold, can know whether to need convert charging mode.
407th, quick charge mode is stopped using to be charged for battery, execution step 305.
During specifically realizing at one, it is possible to use the mode of constant voltage is charged for battery, for example, work as electricity
When the voltage in pond is increased to blanking voltage, it is charged for battery using blanking voltage.
Method for charging batteries provided in an embodiment of the present invention, by the relation for comparing charging current and the second current threshold,
Determined the need for being converted to the charging modes of battery charging according to comparative result, therefore, in the inventive solutions,
Can be by the State Transferring according to battery as battery charging in the way of, so as to further increasing the security of battery and having ensured electricity
The service life in pond.
Embodiment five
Fig. 8 is the flow chart of method for charging batteries example IV provided in an embodiment of the present invention, as shown in figure 8, of the invention
Method for charging batteries in embodiment, is applied in the battery charger in embodiment one, specifically may include steps of：
501st, the voltage difference between processing unit detection sampling resistor first end and the second end.
502nd, whether processing unit determines battery in charged state according to voltage difference.
If the 503, battery is in charged state, and charging current is more than the 3rd current threshold, stops charging for battery.
In embodiments of the present invention, it is to be appreciated that the 3rd current threshold is the maximum that battery does not occur safety issue
Charging current, for example, easily causes the electric current of battery explosion.
Therefore, when charging current is more than three current thresholds, it is believed that battery occurs safety issue, needs to stop
Only charge for battery.
Method for charging batteries provided in an embodiment of the present invention, by the relation for comparing charging current and the 3rd current threshold,
Determine whether battery is in a safe condition, so as to further increasing the security of battery and having ensured the service life of battery.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, is used so that a computer including some instructions
Device (can be personal computer, server, or network equipment etc.) or processor (Processor) perform the present invention each
The part steps of embodiment methods described.And aforesaid storage medium includes：USB flash disk, portable hard drive, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Device embodiment described above is only schematic, wherein as the unit of separating component explanation can be
Or may not be physically separate, as the part that unit shows can be or may not be physical location, i.e.,
May be located at one it is local, or can also be distributed at least two NEs.Which is selected according to the actual needs can
In some or all of module realizing the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (11)
1. a kind of battery charger, it is characterised in that include：
Power pins；
Battery；
Switch element；
Processing unit；
Sampling unit；
The positive pole of the battery is connected with the positive pole of the power pins；
The negative pole of the battery is connected with the first end of the sampling unit, and the second end and the power supply of the sampling unit draw
The negative pole connection of pin；
The processing unit is connected with the switch element；
The processing unit is connected with the sampling unit；
The switch element is connected with the positive pole of the battery.
2. battery charger according to claim 1, it is characterised in that the switch element includes：
First Metal-oxide-semicondutor metal-oxide-semiconductor；
Second metal-oxide-semiconductor；
The sampling unit is sampling resistor；
The processing unit includes：First voltage output pin, second voltage output pin, first voltage detection pin, second
Voltage detecting pin；
The positive pole of battery positive pole respectively with the power pins, the drain electrode of second metal-oxide-semiconductor are connected, the battery
Negative pole is connected with the second end of the sampling resistor；
The grid of first metal-oxide-semiconductor is connected with the first voltage output pin, source electrode and the electricity of first metal-oxide-semiconductor
The negative pole connection of source pin, the drain electrode of first metal-oxide-semiconductor are connected with the first end of the sampling resistor；
The first end of the sampling resistor and first voltage detection pin is connected, the second end of the sampling resistor with it is described
Second voltage detection pin connection；
The grid of second metal-oxide-semiconductor is connected with the second voltage output pin, the source ground of second metal-oxide-semiconductor.
3. battery charger according to claim 2, it is characterised in that also include：
Detection resistance；
The processing unit also includes：Power pins voltage pin；
The first end of the detection resistance is connected with the power pins voltage pin, the second end of the detection resistance with it is described
The positive pole connection of battery.
4. a kind of method for charging batteries, the battery charger being applied in Claims 2 or 3, it is characterised in that include：
Processing unit detects the voltage difference between sampling resistor first end and the second end；
Whether the processing unit determines battery in charged state according to the voltage difference；
If the battery is in charged state, the charging current that the processing unit is input into according to power pins is defined as described
The charging modes that battery charges, the charging modes include quick charge mode and normal charge mode.
5. method according to claim 4, it is characterised in that the charging current of the power pins input with flow through
The size of current of the sampling resistor is equal, and the electric current for flowing through the sampling resistor is hindered with the sampling resistor for the voltage difference
The ratio of value.
6. method according to claim 5, it is characterised in that whether the processing unit determines battery according to the voltage
In charged state, including：
The processing unit determines the sense of current for flowing through the sampling resistor according to the electric differential pressure；
If the sense of current is the inflow battery, it is determined that the battery is in charged state；
If the sense of current is the outflow battery, it is determined that the battery is in discharge condition.
7. method according to claim 5, it is characterised in that if the battery is in charged state, according to power pins
The charging current of input, is defined as the charging modes that the battery charges, and the charging modes include quick charge mode and often
Rule charging modes, including：
If the battery is in the relation of charged state, the comparison charging current and the first current threshold；
If the charging current is more than or equal to first current threshold, filled for the battery using quick charge mode
Electricity；
If the charging current is less than first current threshold, charged for the battery using normal charge mode.
8. method according to claim 7, it is characterised in that methods described also includes：
After being battery charging using the quick charge mode, if the charging current is less than second current threshold,
The quick charge mode is stopped using to be charged for the battery, second current threshold is less than first current threshold
Value；
It is charged for the battery using the normal charge mode.
9. method according to claim 7, it is characterised in that the quick charge mode is pulse charging manner；
Charged for the battery using quick charge mode, including：
The processing unit periodic intervals turn on the grid of the grid and the second metal-oxide-semiconductor of the first metal-oxide-semiconductor, so that the first metal-oxide-semiconductor
Drain electrode and the second metal-oxide-semiconductor drain electrode alternately output pulse charging current.
10. method according to claim 7, it is characterised in that the normal charge mode is constant voltage charging method；
It is charged for the battery using the normal charge mode, including：
The processing unit turns on the grid of the first metal-oxide-semiconductor and is not turned on the second metal-oxide-semiconductor, is entered for the battery using constant voltage
Row charges.
11. methods according to claim 5, it is characterised in that methods described also includes：
If the battery is in charged state, and the charging current is more than the 3rd current threshold, stops charging for the battery.
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|---|---|---|---|
| CN201611243610.XA CN106532865B (en) | 2016-12-29 | 2016-12-29 | Battery charger and charging method |
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|---|---|---|---|
| CN201611243610.XA CN106532865B (en) | 2016-12-29 | 2016-12-29 | Battery charger and charging method |
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| JP2004248405A (en) * | 2003-02-13 | 2004-09-02 | Fuji Heavy Ind Ltd | Battery managing device of vehicle |
| CN101237158A (en) * | 2006-10-23 | 2008-08-06 | 索尼株式会社 | Charger and method of charging |
| CN104218624A (en) * | 2013-05-30 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | A charging circuit for a lithium battery and a lamp |
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| CN106532865B (en) | 2019-03-19 |
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