CN106532865B - Battery charger and charging method - Google Patents
Battery charger and charging method Download PDFInfo
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- CN106532865B CN106532865B CN201611243610.XA CN201611243610A CN106532865B CN 106532865 B CN106532865 B CN 106532865B CN 201611243610 A CN201611243610 A CN 201611243610A CN 106532865 B CN106532865 B CN 106532865B
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- 238000007600 charging Methods 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 48
- 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 23
- 230000005611 electricity Effects 0.000 claims description 23
- 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
- 238000010586 diagram Methods 0.000 description 6
- 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 4
- 230000000694 effects Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 238000007599 discharging Methods 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
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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- H02J7/0086—
Abstract
The embodiment of the present invention provides a kind of battery charger and charging method.Method for charging batteries provided in an embodiment of the present invention, comprising: processing unit detects the voltage difference between sampling resistor first end and second end；The processing unit determines whether battery is in charged state according to the voltage difference；If the battery is in charged state, the charging current that the processing unit is inputted according to power pins is determined as the charging modes of the battery charging, and the charging modes include quick charge mode and normal charge mode.Technical solution of the present invention can according to power pins input charging current size come determine currently be battery charge charging equipment whether be and the matched charging equipment of battery, and then it is determined as the mode of battery charging, to improve the safety of battery and ensure the service life of battery.
Description
Technical field
The present invention relates to battery technology field more particularly to a kind of battery charger and charging methods.
Background technique
With the continuous promotion of modern science and technology technology, people are higher and higher for the dependency degree of terminal, mention as terminal
For the battery of electric energy, how to enhance cruising ability with and the problems such as improving charging rate 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 conditions
A kind of charging equipment of model is answered, the charging equipment of every kind of model has fixed charging voltage and charging current.Due to different
The interface of the charging equipment of model is largely consistent, therefore user is being filled using charging equipment for the battery in electronic equipment
When electric, charging equipment model is easy matching error.
Therefore, it when the battery size in charging equipment model and electronic equipment mismatches, easily causes battery and pole occurs
Change phenomenon, this will cause great security risk to lithium battery, and battery capacity is promoted to decay rapidly, and that reduces battery uses the longevity
Life.
Summary of the invention
The embodiment of the present invention provides a kind of battery charger and charging method, realizes and improves battery security and ensure
The service life effect of battery.
The embodiment of the present invention provides a kind of battery charger, comprising:
Power pins；
Battery；
Switch unit；
Processing unit；
Sampling unit；
The anode of the battery is connect with the anode of the power pins；
The cathode of the battery is connect with the first end of the sampling unit, the second end of the sampling unit and the electricity
The cathode of source pin connects；
The processing unit is connect with the switch unit；
The processing unit is connect with the sampling unit；
The switch unit is connect with the anode of the battery.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation,
The switch unit includes:
First Metal-oxide-semicondutor metal-oxide-semiconductor；
Second metal-oxide-semiconductor；
The sampling unit is sampling resistor；
The processing unit include: first voltage output pin, second voltage output pin, first voltage detection pin,
Second voltage detects pin；
The anode of the battery is connect with the drain electrode of positive, described second metal-oxide-semiconductor of the power pins respectively, the electricity
The cathode in pond is connect with the second end of the sampling resistor；
The grid of first metal-oxide-semiconductor is connect with the first voltage output pin, the source electrode of first metal-oxide-semiconductor and institute
The cathode connection of power pins is stated, the drain electrode of first metal-oxide-semiconductor is connect with the first end of the sampling resistor；
The first end of the sampling resistor and the first voltage detection pin connects, the second end of the sampling resistor and
The second voltage detection pin connection；
The grid of second metal-oxide-semiconductor is connect with the second voltage output pin, and the source electrode of second metal-oxide-semiconductor connects
Ground.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, further includes:
Detection resistance；
The processing unit further include: power pins voltage pin；
The first end of the detection resistance is connect with the power pins voltage pin, the second end of the detection resistance with
The anode 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, comprising:
Processing unit detects the voltage difference between sampling resistor first end and second end；
The processing unit determines whether battery is in charged state according to the voltage difference；
If the battery is in charged state, the charging current that the processing unit is inputted according to power pins is determined as
The charging modes of the battery charging, the charging modes include quick charge mode and normal charge mode.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the power supply draw
The charging current of foot 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 value.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the processing are single
Member determines whether battery is in charged state according to the voltage, comprising:
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 to flow into the battery, it is determined that the battery is in charged state；
If the sense of current is to flow out the battery, it is determined that the battery is in discharge condition.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, if the battery
The charging modes of the battery charging, the charging are determined as according to the charging current that power pins input in charged state
Mode includes quick charge mode and normal charge mode, comprising:
If the battery is in charged state, the relationship of the charging current and the first current threshold；
It the use of quick charge mode is the battery if the charging current is more than or equal to first current threshold
Charging；
It the use of normal charge mode is battery charging if the charging current is less than first current threshold.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the method is also
Include:
It the use of the quick charge mode is after the battery charges, if the charging current is less than second current threshold
Value, stopping using the quick charge mode is that the battery charges, and second current threshold is less than first electricity
Flow threshold value；
It the use of the normal charge mode is that the battery charges.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, it is described quickly to fill
Electric mode is pulse charging manner；
It the use of quick charge mode is battery charging, comprising:
The grid of the first metal-oxide-semiconductor and the grid of the second metal-oxide-semiconductor is connected in the processing unit periodic intervals, 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.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the routine are filled
Electric mode is constant voltage charging method；
It the use of the normal charge mode is that the battery charges, comprising:
The processing unit is connected 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
It charges in pond.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the method is also
Include:
If the battery is in charged state, and the charging current is greater than third current threshold, stops as the battery
Charging.
Battery charger provided in an embodiment of the present invention and charging method detect sampling resistor first through the processing unit
The voltage difference between second end is held to determine whether battery is in charged state, when battery is in charged state, processing is single
Member is determined using quick charge mode or using normal charge mode according to the charging current that power pins input come for electricity
Pond is charged, therefore, in the inventive solutions, can be according to the size for the charging current that power pins input come really
It is settled before be battery charging charging equipment whether be with the matched charging equipment of battery, and then be determined as battery charge side
Formula solves in the prior art, to improve the safety of battery and ensure the service life of battery when charging equipment type
Number in electronic equipment battery size mismatch when, easily cause battery and polarization phenomena occur, this will cause pole to lithium battery
Big security risk, and the problem of promote battery capacity to decay rapidly, reduce the service life of battery.
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 this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the first structure diagram of the embodiment of battery charger provided in an embodiment of the present invention；
Fig. 2 is the second structural schematic diagram of the embodiment of battery charger provided in an embodiment of the present invention；
Fig. 3 is the third structural schematic diagram 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 one provided in an embodiment of the present invention；
Fig. 5 is the flow chart of method for charging batteries embodiment two provided in an embodiment of the present invention；
Fig. 6 is the electric current and time chart of method for charging batteries embodiment two provided in an embodiment of the present invention；
Fig. 7 is the flow chart of method for charging batteries embodiment three provided in an embodiment of the present invention；
Fig. 8 is the flow chart of method for charging batteries example IV provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
Embodiment one
Fig. 1 is the first structure diagram of the embodiment of battery charger provided in an embodiment of the present invention, such as Fig. 1 institute
Show, the battery charger of the embodiment of the present invention, may include: power pins, battery, switch unit, processing unit, sampling list
Member.
As shown in Figure 1, power pins include the positive P+ of power pins and the cathode P- of power pins, power pins are used for
Electric energy is provided for battery when battery needs to charge, in embodiments of the present invention, the positive P+ of power pins and power pins
Cathode 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 anode of battery connect with the anode of power pins, adopts
Sample unit is used to determine that the state of the charge or discharge of battery, the cathode of battery and the first end of sampling unit to connect, and sampling is single
The second end of member and the cathode of power pins connect.Processing unit is connect with sampling unit, and processing unit is connect with switch unit,
Allow processing unit according to the data of sampling unit and the state of battery, transmit and instruct to switch unit, and by opening
The control for closing unit is changed to the charging modes of battery charging, and switch unit is also used to control the beginning and stopping of charging, because
This, the anode of switch unit and battery connects.
Fig. 2 is the second structural schematic diagram of the embodiment of battery charger provided in an embodiment of the present invention, such as Fig. 2 institute
Show, the battery charger of the embodiment of the present invention, switch unit may include: the first MOS (Metal-Oxide-
Semiconductor, Metal-oxide-semicondutor) pipe Q1, the second metal-oxide-semiconductor Q2, sampling unit is sampling resistor R1。
As shown in Fig. 2, processing unit U includes first voltage output pin P1, second voltage output pin P2, the first electricity
Pressure detection pin P3, second voltage detect pin P4.In embodiments of the present invention, it is built-in with coded program in processing unit U,
It can be defined according to the battery of different model, for example, the voltage value of first voltage output pin P1 output, second voltage
The voltage value of output pin P2 output, first voltage output pin P1 output duration, second voltage output pin P2 output
Duration, voltage threshold, current threshold etc..
As shown in Fig. 2, battery includes anode+and cathode-, 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 second end.Wherein, the anode of battery+draw with power supply
The anode of the positive P+ connection of foot, battery is connect with the drain electrode of the second metal-oxide-semiconductor Q2, the cathode-and sampling resistor R of battery1?
The connection of two ends, the grid of the first metal-oxide-semiconductor Q1 are connect with first voltage output pin P1, and the source electrode of the first metal-oxide-semiconductor Q1 draws with power supply
The cathode P- connection of foot, the drain electrode of the first metal-oxide-semiconductor Q1 and sampling resistor R1First end connection, sampling resistor R1First end with
First voltage detects pin P3 connection, sampling resistor R1Second end and second voltage detection pin P4 connect, the second metal-oxide-semiconductor Q2
Grid connect with second voltage output pin P2, the source electrode of the second metal-oxide-semiconductor Q2 ground connection.
Fig. 3 is another structural schematic diagram of the embodiment of battery charger provided in an embodiment of the present invention, such as Fig. 2 institute
Show, the battery charger of the embodiment of the present invention can also include: detection resistance R on the basis of Fig. 12.Detection resistance R2It can
To be used to detect the voltage of battery, therefore, processing unit U is also needed with power pins voltage pin VCC, so that detection resistance
R2First end connect with power pins voltage pin VCC, detection resistance R2Second end and battery anode+connection.
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
Equipment, wearable device, tablet computer (Tablet Computer), mobile phone, MP3 player, electricity used in MP4 player
Pond.
Battery charger provided in an embodiment of the present invention, U detects sampling resistor R through the processing unit1First end and the
Voltage difference between two ends determines whether battery is in charged state, when battery is in charged state, processing unit U according to
Power pins input charging current come determine using quick charge mode or using normal charge mode come for battery progress
Charging, therefore, in the inventive solutions, the size for the charging current that can be inputted according to power pins is current to determine
For battery charging charging equipment whether be with the matched charging equipment of battery, and then be determined as battery charging mode, thus
It improves the safety of battery and has ensured the service life of battery, solve in the prior art, when charging equipment model and electricity
When battery size in sub- equipment mismatches, easily causes battery and polarization phenomena occur, this will cause lithium battery greatly to pacify
Full blast danger, and the problem of promote battery capacity to decay rapidly, reduce the service life of battery.
The working principle of above-mentioned battery charger is as follows:
Pin P3 is detected according to first voltage and second voltage detects the collected sampling resistor R of pin P41Voltage difference
It determines the size of electric current in the trend of electric current in circuit and circuit, and then determines that battery is in charged state or to put
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
Quick charge mode can be used to charge for battery.Quick charge mode can be pulse charging manner, pass through periodicity
Interval the first metal-oxide-semiconductor Q1 of conducting and the second metal-oxide-semiconductor Q2 forms pulse charging current and specifically passes through first voltage output pin
The voltage that the first metal-oxide-semiconductor Q1 can be connected of P1 output forms positive arteries and veins so that the source electrode of the first metal-oxide-semiconductor Q1 and drain electrode are connected
Charging current is rushed, then by the voltage that the second metal-oxide-semiconductor Q2 can be connected of second voltage output pin P2 output, so that second
The source electrode of metal-oxide-semiconductor Q2 and drain electrode are connected, and form negative-going pulse charging current.If the charging current in circuit is less than the first current threshold
Value, it is determined that normal charge mode can be used to charge for battery, normal charge mode can be constant voltage charging method or
Person's constant current charging method or first constant-current charge constant voltage charging method again.Normal charge mode, it is specifically, defeated by first voltage
The voltage that the first metal-oxide-semiconductor Q1 can be connected of pin P1 output out, so that the first metal-oxide-semiconductor Q1 constant conduction.When needs stopping 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 one provided in an embodiment of the present invention, as shown in figure 4, of the invention
Method for charging batteries in embodiment can be applied in the battery charger in embodiment one, can specifically include as follows
Step:
201, the voltage difference between processing unit detection sampling resistor first end and second end.
In embodiments of the present invention, processing unit includes that first voltage detects pin P3, second voltage detection pin P4,
In, first voltage detects pin P3 connection sampling resistor R1First end, second voltage detect pin P4 connection sampling resistor R1's
Second end, as sampling resistor R1In when thering is electric current to pass through, sampling resistor R1Itself can generate voltage difference, can pass through the first electricity
Pressure detection pin P3 is calculated with the second voltage detection pin P4 voltage value detected, for example, U (R1)=U (P3)-U
(P4)。
202, processing unit determines whether battery is in charged state according to voltage difference.
Since electric current has directionality, when current direction battery, it is possible to understand that be positive is using external power pins
Battery charging, when electric current flows out battery, it can be understood as battery is discharging.Therefore, in embodiments of the present invention, processing is single
Member determines the sense of current for flowing through sampling resistor according to electric differential pressure.Specifically, if sense of current is to flow into 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 external power pins can be any one charging equipment, for example, charger, mobile electricity
Source pin etc..
For example, first voltage detection pin P3 detects that voltage value is 3V, the electricity that second voltage detection pin P4 is detected
Pressure value is 2.5V, U (R1)=U (P3)-U (P4)=0.5V may determine that sense of current then to flow into battery, and processing unit is true
Determine battery and is in charged state.
If 203, battery is in charged state, the charging current that processing unit is inputted according to power pins is determined as battery
The charging modes of charging, charging modes include quick charge mode and normal charge mode.
In embodiments of the present invention, when connecting external power supply pin is that battery charges, electric current can flow through sampling resistor R1,
Since the internal resistance of sampling resistor is smaller, it can be understood as the charging current of power pins input and the electric current for flowing through sampling resistor are big
Small equal, therefore, the electric current for flowing through sampling resistor can be obtained by calculating, and specifically, flow through the electric current of sampling resistor as electricity
Charging current I, the I=U (R of the ratio of pressure difference and sampling resistor resistance value, i.e. power pins input1)/R1。
For example, U (R1)=2.8V, R1=1 Ω, then the charging current I=2.8/1=2.8A that power pins input.
Due to the battery of different model, the battery core composition material of battery can be different, the capacity of corresponding battery, battery
Charging rate can be different.Therefore, the battery of every kind of model corresponds to a kind of charging modes for being suitble to the size battery, is ensureing
While the safety of battery, the charging rate of battery can also be promoted.It can be embodied in filling for charging equipment input accordingly
The data such as size, the size of charging voltage of electric current.
Therefore in embodiments of the present invention, the charging current of power pins input can be detected through the processing unit,
And through the processing unit in pre-set charging current be compared, and according to corresponding comparison result be determined as battery charging
Charging modes.During a concrete implementation, charging modes include quick charge mode and normal charge mode.It can be with
Understand, quick charge mode charging rate is very fast, and the charging current used accordingly is larger, and normal charge mode charges
Speed is slower, and the charging current used accordingly is smaller.
Wherein, quick charge mode may include the modes such as high-power quick charge mode, pulse charging manner, routinely fill
Electric mode may include constant-voltage charge, constant-current charge, first the constant-current charge modes such as constant-voltage charge again.
It should be noted that high-power quick charge mode, the power of output is greater than 10W.
It should be noted that in embodiments of the present invention, pulse charging manner may include at least two charging processes not
Same charging modes, for example, the different perhaps discharge current differences of charging current or charging duration difference etc..
When the charging current of power pins input is identical as charging current pre-set in processing unit, it is believed that
The charging equipment for being currently battery charging is the charging equipment to match with battery, and the use of the charging modes of suitable battery is electricity
Pond charging, for example, quick charge mode.When charging electricity pre-set in the charging current of power pins input and processing unit
Flow it is not identical when, it is believed that currently be battery charging charging equipment for the unmatched charging equipment of battery, need using
Other charging modes are battery charging, for example, normal charge mode.
Method for charging batteries provided in an embodiment of the present invention detects sampling resistor first end and second end through the processing unit
Between voltage difference determine whether battery is in charged state, when battery is in charged state, processing unit is according to power supply
The charging current of pin input determined using quick charge mode or charged using normal charge mode for battery,
Therefore, in the inventive solutions, the size for the charging current that can be inputted according to power pins is current for electricity to determine
Pond charging charging equipment whether be with the matched charging equipment of battery, and then be determined as battery charging mode, to improve
The safety of battery and the service life for having ensured battery, solve in the prior art, when charging equipment model is set with electronics
When battery size in standby mismatches, easily causes battery and polarization phenomena occur, this will cause great safety wind to lithium battery
Nearly, the problem of and promoting battery capacity to decay rapidly, reduce the service life of battery.
Embodiment three
Fig. 5 is the flow chart of method for charging batteries embodiment two provided in an embodiment of the present invention, as shown in figure 5, of the invention
Method for charging batteries in embodiment can be applied in the battery charger in embodiment one, can specifically include as follows
Step:
301, the voltage difference between processing unit detection sampling resistor first end and second end.
302, processing unit determines whether battery is in charged state according to voltage difference.
If 303, battery is in charged state, compare the relationship of charging current Yu the first current threshold, if charging current is big
In or equal to the first current threshold, step 304 is executed, if charging current executes step 305 less than the first current threshold.
For example, the first current threshold is 3.5A, when charging current is 3.0A, charging current less than the first current threshold,
It the use of normal charge mode is battery charging.
In another example the first current threshold is 3.5A, when charging current is 3.6A, charging current is greater than the first current threshold
Value is battery charging using quick charge mode.
It 304, the use of quick charge mode is battery charging.
During a concrete implementation, quick charge mode is pulse charging manner.It is used in pulse charging manner
Pulse charging current include charging current and discharge current, by charging current being periodically used alternatingly and discharge current is
Battery charges.Wherein, biggish electric current can be used in charging current, is alleviated after charging current using discharge current
Due to using polarization phenomena brought by biggish electric current charging, it is thereby achieved that accelerating the effect of charging rate.
In embodiments of the present invention, in conjunction with the embodiments the battery charger in one it is found that processing unit periodic intervals
The grid of the first metal-oxide-semiconductor and the grid of the second metal-oxide-semiconductor is connected, so that the drain electrode of the first metal-oxide-semiconductor and the drain electrode of the second metal-oxide-semiconductor replace
Export pulse charging current.Specifically, charging current is formed when the grid of the first metal-oxide-semiconductor is connected in processing unit, when processing is single
Discharge current is formed when the grid of member the second metal-oxide-semiconductor of conducting.Be connected the grid of the first metal-oxide-semiconductor time can by processing unit into
Row control, the time that the grid of the second metal-oxide-semiconductor is connected can also be controlled by processing unit, the pulse charging current formed
It can be illustrated by Fig. 5.Fig. 6 is electric current and the time of method for charging batteries embodiment two provided in an embodiment of the present invention
The 2nd MOS is connected as shown in fig. 6, the charging current that the grid of the first metal-oxide-semiconductor of conducting is formed is positive charging current in relational graph
The discharge current that the grid of pipe is formed is negative sense discharge current.
It 305, the use of normal charge mode is battery charging.
During a concrete implementation, normal charge mode may include constant voltage charging method and ladder charging side
Formula.It is that battery charges that constant voltage charging method, which is using constant voltage, and ladder charging modes are to use different constant voltages
It is that battery charges according to specified sequence.In embodiments of the present invention, the battery charger in conjunction with the embodiments in one can
Know, processing unit is connected the grid of the first metal-oxide-semiconductor and is not turned on the second metal-oxide-semiconductor, is continuously so that positive charge electric current is used only
Battery charges.
Method for charging batteries provided in an embodiment of the present invention detects sampling resistor first end and second end through the processing unit
Between voltage difference determine whether battery is 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 comparison result using quick charge mode or
Person is charged using normal charge mode for battery, therefore, in the inventive solutions, can be according to power pins
The size of the charging current of input come determine currently be battery charge charging equipment whether be with the matched charging equipment of battery,
And then it is determined as the mode of battery charging, to improve the safety of battery and ensure the service life of battery, solve
In the prior art, it when the battery size in charging equipment model and electronic equipment mismatches, easily causes battery and polarizes
Phenomenon, this will cause great security risk to lithium battery, and battery capacity is promoted to decay rapidly, reduce the service life of battery
The problem of.
Example IV
Fig. 7 is the flow chart of method for charging batteries embodiment three provided in an embodiment of the present invention, as shown in fig. 7, of the invention
Method for charging batteries in embodiment, can be applied in the battery charger in embodiment one, step in the third embodiment
After rapid 304, it can also include the following steps:
404, compare the relationship of charging current Yu the second current threshold, if charging current is executed less than the second current threshold
Step 407, if charging current is more than or equal to the second current threshold, step 304 is executed.
As charging progresses, the voltage of battery constantly increases, and 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 in processing unit connects inspection
The first end of measuring resistance, the anode of the second end connection battery of detection resistance, passes through the collected electricity of power pins voltage pin
Pressure value determines the current voltage of battery.
When the voltage of battery is increased to blanking voltage, electricity in battery is already close to rated capacity, mistake in order to prevent
Degree charges and damages battery, needs to stop using quick charge mode for battery is charged and is converted to and uses normal charge side
Formula continues as battery and charges.And when the voltage of battery is increased to blanking voltage, charging current will be gradually reduced, therefore,
By comparing the relationship of charging current and the second current threshold, can know whether to need convert charging mode.
407, stopping using quick charge mode is that battery charges, and executes step 305.
During specifically realizing for one, the mode that constant voltage can be used is that battery charges, for example, when electricity
It the use of blanking voltage is that battery charges when the voltage in pond is increased to blanking voltage.
Method for charging batteries provided in an embodiment of the present invention, by comparing the relationship of charging current and the second current threshold,
Determine the need for being converted to the charging modes of battery charging according to comparison result, therefore, in the inventive solutions,
The mode of battery charging can be converted to according to the state of battery, to further improve the safety of battery and ensure 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 can specifically include following steps applied in the battery charger in embodiment one:
501, the voltage difference between processing unit detection sampling resistor first end and second end.
502, processing unit determines whether battery is in charged state according to voltage difference.
If 503, battery is in charged state, and charging current is greater than third current threshold, stops as battery charging.
In embodiments of the present invention, it is to be appreciated that third current threshold is the maximum that safety issue does not occur for battery
Charging current, for example, easily causing the electric current of battery explosion.
Therefore, when charging current is greater than third current threshold, it is believed that battery will appear safety issue, need to stop
Only charge for battery.
Method for charging batteries provided in an embodiment of the present invention, by comparing the relationship of charging current and third current threshold,
Whether in a safe condition battery is determined, to further improve the safety of battery and ensure the service life of battery.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
It is each that device (can be personal computer, server or network equipment etc.) or processor (Processor) execute the present invention
The part steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. it is various
It can store the medium of program code.
The apparatus embodiments described above are merely exemplary, wherein unit can be as illustrated by the separation member
Or may not be and be physically separated, component shown as a unit may or may not be physical unit, i.e.,
It can be located in one place, or may be distributed at least two network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (7)
1. a kind of method for charging batteries is applied to battery charger,
The battery charger includes:
Power pins；
Battery；
Switch unit；
Processing unit；
Sampling unit；
The anode of the battery is connect with the anode of the power pins；
The cathode of the battery is connect with the first end of the sampling unit, and the second end of the sampling unit is drawn with the power supply
The cathode of foot connects；
The processing unit is connect with the switch unit；
The processing unit is connect with the sampling unit；
The switch unit is connect with the anode of the battery；
The switch unit includes:
First 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 anode of the battery is connect with the drain electrode of positive, described second metal-oxide-semiconductor of the power pins respectively, the battery
Cathode is connect with the second end of the sampling resistor；
The grid of first metal-oxide-semiconductor is connect with the first voltage output pin, the source electrode and the electricity of first metal-oxide-semiconductor
The cathode of source pin connects, and the drain electrode of first metal-oxide-semiconductor is connect with the first end of the sampling resistor；
The first end of the sampling resistor and the first voltage detection pin are connect, the second end of the sampling resistor with it is described
Second voltage detects pin connection；
The grid of second metal-oxide-semiconductor is connect with the second voltage output pin, the source electrode ground connection of second metal-oxide-semiconductor；
It is characterized in that, the method for charging batteries includes:
Processing unit detects the voltage difference between sampling resistor first end and second end；
The processing unit determines whether battery is in charged state according to the voltage difference；
If the battery is in charged state, the charging current that the processing unit is inputted according to power pins is determined as described
The charging modes of battery charging, the charging modes include quick charge mode and normal charge mode；
Wherein, if the battery is in charged state, according to the charging current that power pins input, it is determined as the battery
The charging modes of charging, the charging modes include quick charge mode and normal charge mode, comprising:
If the battery is in charged state, the relationship of the charging current and the first current threshold；
It the use of quick charge mode is that the battery fills if the charging current is more than or equal to first current threshold
Electricity；
It the use of normal charge mode is battery charging if the charging current is less than first current threshold.
2. the method according to claim 1, wherein the power pins input the charging current with flow through
The size of current of the sampling resistor is equal, and the electric current for flowing through the sampling resistor is that the voltage difference and the sampling resistor hinder
The ratio of value.
3. according to the method described in claim 2, it is characterized in that, whether the processing unit determines battery according to the voltage
In charged state, comprising:
The processing unit determines the sense of current for flowing through the sampling resistor according to the voltage difference；
If the sense of current is to flow into the battery, it is determined that the battery is in charged state；
If the sense of current is to flow out the battery, it is determined that the battery is in discharge condition.
4. according to the method described in claim 2, it is characterized in that, the method also includes:
It the use of the quick charge mode is after the battery charges, if the charging current stops less than the second current threshold
It the use of the quick charge mode is that the battery charges, second current threshold is less than first current threshold；
It the use of the normal charge mode is that the battery charges.
5. according to the method described in claim 2, it is characterized in that, the quick charge mode is pulse charging manner；
It the use of quick charge mode is battery charging, comprising:
The grid of the first metal-oxide-semiconductor and the grid of the second metal-oxide-semiconductor is connected in the processing unit periodic intervals, so that the first metal-oxide-semiconductor
Drain electrode and the second metal-oxide-semiconductor drain electrode alternately export pulse charging current.
6. according to the method described in claim 2, it is characterized in that, the normal charge mode is constant voltage charging method；
It the use of the normal charge mode is that the battery charges, comprising:
The processing unit is connected the grid of the first metal-oxide-semiconductor and is not turned on the second metal-oxide-semiconductor, using constant voltage be the battery into
Row charging.
7. according to the method described in claim 2, it is characterized in that, the method also includes:
If the battery is in charged state, and the charging current is greater than third current threshold, stops as battery charging.
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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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| CN106532865A (en) | 2017-03-22 |
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