CN106483462B - A kind of measurement method and device of battery charge - Google Patents
A kind of measurement method and device of battery charge Download PDFInfo
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- CN106483462B CN106483462B CN201510541198.9A CN201510541198A CN106483462B CN 106483462 B CN106483462 B CN 106483462B CN 201510541198 A CN201510541198 A CN 201510541198A CN 106483462 B CN106483462 B CN 106483462B
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Abstract
The invention discloses a kind of measurement method of battery charge and devices, for solving the problems, such as OCV method metering charge capacity inaccuracy.Method includes: to determine current battery charge according to the battery capacity of the coulomb value currently measured and the initial time that charges using coulomb metering method into after constant-current charging phase；Into after constant voltage charging phase, according to current charging current, current battery charge is determined.It since constant-current charging phase uses coulomb metering method, can not only guarantee the accuracy for the current electric quantity determined, but also the smooth feature of charging curve of coulomb metering method can be played；After entering constant voltage charging phase, current battery charge is calculated with charging current and the linear relationship of current battery charge, can accurately reflect the practical electricity of present battery, and can guarantee the flatness of charging curve.
Description
Technical field
The present invention relates to technical field of electronic equipment, in particular to the measurement method and device of a kind of battery charge.
Background technique
Currently, electronic equipment generally uses lithium battery power supply, according to the characteristic of lithium battery, one of lithium battery can be filled
The electric period is divided into trickle charge, constant-current charge and constant-voltage charge three phases.Three phases are mainly by charging circuit
(charger) it controls, detailed process is as shown in Figure 1, by taking full piezoelectric voltage is the lithium battery of 4.2V as an example, charging process packet
It includes:
The trickle charge stage: when cell voltage be less than 3.0V when, charging circuit according to preset low current (generally
100mA) it is pre-charged；
Constant-current charging phase: when cell voltage is greater than 3.0V, charging circuit can be according to preset Constant Electric Current flow valuve to battery
It charges；
Constant voltage charging phase: after cell voltage increases to 4.2V, in the case where 4.2V expires piezoelectric voltage, charging circuit is gradually reduced
Charging current is until reaching full electricity cut-off charging current.
Charge capacity is generally measured using open-circuit voltage (Open Circuit Voltage, OCV) method at present.This method is first
Internal charging resistance is first calculated, battery open circuit voltage OCV is then calculated by internal charging resistance, the OCV-SOC curve prestored is looked by OCV
Table obtains current electric quantity (State of Charge, SOC).Charge capacity is calculated using OCV method to have the disadvantage that
Since calculated OCV is there are large error, the SOC inaccuracy for the acquisition that causes to table look-up.Due to the OCV being calculated
There are large errors, if the OCV calculated is excessively high, when calculated OCV reaches 4.2V, the practical OCV of battery may be small at this time
In 4.2V, causes battery not to be full of really in this way, influence cruise duration；If the OCV calculated is relatively low, as calculated OCV
When less than 4.2V, the practical OCV of battery may have reached 4.2V at this time, continue charging and be likely to result in the risk overcharged.Using
OCV method needs specially to test every money battery OCV-SOC curve table, and test OCV-SOC curve ratio is relatively time-consuming, low efficiency.
Summary of the invention
The embodiment of the invention provides a kind of measurement method of battery charge and devices, for solving the metering of OCV method
The problem of charge capacity inaccuracy.
The embodiment of the invention provides a kind of measurement methods of battery charge, comprising: trickle charge stage, constant current are filled
Electric rank and constant voltage charging phase；Wherein:
Into after constant-current charging phase, using coulomb metering method, when being originated according to the coulomb value and charging that currently measure
The battery capacity at quarter, determines current battery charge；
Into after constant voltage charging phase, according to current charging current, current battery charge is determined.
Preferably, this method further include: in the trickle charge stage, using coulomb metering method, according to the library currently measured
The battery capacity of human relations value and charging initial time, determines current battery charge.
When preferably, into constant voltage charging phase, according to following formula, current battery charge is determined, comprising:
SOCcv(i)=a*i+b；
Wherein, SOCcvIt (i) is current battery charge, i is current charging current；Coefficient a and coefficient b be according to enter constant pressure
Corresponding cut-off is filled when charging current when the charging stage is with the battery capacity and battery full electricity when entering constant voltage charging phase
Electric current is determined with battery capacity corresponding when reaching cut-off charging current.
Preferably, after determining current battery charge, this method further include:
Determine weight；
According to weight, processing is weighted to current display electricity and current battery charge, obtains current filter electricity；
According to current filter electricity, obtain currently showing the step-length that electricity needs to increase；
According to step-length and current display electricity, electricity is shown next time.
Preferably, trickle charge stage and/or constant-current charging phase, determine weight, comprising: according to current battery level
And battery cutoff voltage, determine the weight of trickle charge stage and/or constant-current charging phase；
Into after constant voltage charging phase, weight is determined, comprising: according to the cut-off of current charging current and battery when full electric
Charging current determines the weight of constant voltage charging phase.
Preferably, trickle charge stage or constant-current charging phase, according to following formula, determine the trickle charge stage or
The weight of person's constant-current charging phase:
Weight_cc=(BATvol_cur-BATvol_terminal)/(A-BATvol_terminal)；
Wherein, weight_cc is the weight of trickle charge stage or constant-current charging phase, and BATvol_cur is current electricity
Cell voltage, BATvol_terminal are battery cutoff voltage, and A is the full piezoelectric voltage of constant voltage charging phase setting；
After entering constant voltage charging phase, according to following formula, the weight of constant voltage charging phase is determined:
Weight_cv=(BATi_cur-BATi_terminal)/(BATi_cc-BATi_terminal)；
Wherein, weight_cv is the weight of constant voltage charging phase, and BATi_cur is current charging current, BATi_
Terminal is cut-off charging current when battery is full electric, and BATi_cc is the electric current of constant-current charging phase.
Preferably, trickle charge stage or constant-current charging phase, according to following formula, to current display electricity and currently
Battery capacity is weighted processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cc)+SOCcc_cur*weight_cc
Wherein, SOCfilter_cur is current filter electricity, and SOC_cur is current display electricity, and SOCcc_cur is to work as
Preceding battery capacity, weight_cc are the weight of trickle charge stage or constant-current charging phase；
Into after constant voltage charging phase, according to following formula, current display electricity and current battery charge are weighted
Processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cv)+SOCcv_cur*weight_cv
Wherein, weight_cv is the weight of constant voltage charging phase.
Preferably, it according to current filter electricity, obtains currently showing the step-length that electricity needs to increase, comprising:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
Preferably, trickle charge stage or constant-current charging phase determine intermediate display electricity according to following formula:
SOC1=g*BATvol_cur+d；
G=(A*k+b-SOC_last)/(A-BATvol_last)；
D=A*k+b-g*A；
K=(SOCfilter_cur-SOCfilter_last)/(BATvol_cur-BATvol_last)；
B=SOCfilter_cur-k*BATvol_cur；
Wherein, SOC1 is intermediate display electricity, and BATvol_cur is current battery level, and BATvol_last is the last time
Cell voltage, A are the full piezoelectric voltage of constant voltage charging phase setting, and SOC_last is last display electricity, SOCfilter_cur
For current filter electricity, SOCfilter_last is last filtering electricity；
Into after constant voltage charging phase, according to following formula, intermediate display electricity is determined:
SOC1=g*BATi_cur+d；
G=(BATi_terminal*k+b-SOC_last)/(BATi_terminal-BATi_last)；
D=BATi_terminal*k+b-g*BATi_terminal；
K=(SOCfilter_cur-SOCfilter_last)/(BATi_cur-BATi_last)；
B=SOCfilter_cur-k*BATi_cur；
Wherein, BATi_cur is current charging current, and BATi_last is last charging current, and BATi_terminal is
Cut-off charging current when battery is full electric.
Preferably, according to step-length and current display electricity, electricity is shown next time, comprising:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length determines the corresponding increment of step-length according to the corresponding relationship of preset step-length and increment for negative value,
And determine show next time electricity be currently show electricity and increment and.
Preferably, into after constant voltage charging phase, this method further include:
When current battery charge is greater than or equal to the full electric threshold value of setting, charging circuit is disconnected, and detect present battery
Voltage；
If current battery level is greater than or equal to the full piezoelectric voltage of constant voltage charging phase setting, and is sustained for longer than and sets
Fixed time interval determines that current battery charge is full power consumption.
Preferably, this method further include:
If the current voltage for detecting battery after current charge cycle is the full piezoelectric voltage of setting, in subsequent charge
Period is based on current expiration charging current to determine current display electricity；
If detecting that the current voltage of battery is less than the full piezoelectric voltage of setting after current charge cycle, by current expiration
Charging current reduces the adjustment amount of setting, and after next charge cycle, detects the current voltage of battery, until detection
The current voltage of battery is that the full piezoelectric voltage of setting or current expiration charging current are less than or equal to the cut-off current threshold set out
Value is based on current expiration charging current in the subsequent charge period to determine current display electricity.
The embodiment of the invention provides a kind of measuring devices of battery charge, comprising:
First processing module is used in constant-current charging phase, using coulomb metering device, according to the coulomb value currently measured
With the battery capacity of charging initial time, current battery charge is determined；
Second processing module, for according to current charging current, determining present battery after entering constant voltage charging phase
Electricity.
Preferably, the device further include:
Third processing module is used in the trickle charge stage, using coulomb metering device, according to the coulomb value currently measured
With the battery capacity of charging initial time, current battery charge is determined.
Preferably, the Second processing module determines current battery charge according to following formula, comprising:
SOCcv(i)=a*i+b；
Wherein, SOCcvIt (i) is current battery charge, i is current charging current；Coefficient a and coefficient b be according to enter constant pressure
Corresponding cut-off is filled when charging current when the charging stage is with the battery capacity and battery full electricity when entering constant voltage charging phase
Electric current is determined with battery capacity corresponding when reaching cut-off charging current.
Preferably, the device further include:
Fourth processing module, for determining weight；According to weight, current display electricity and current battery charge are carried out
Weighting processing, obtains current filter electricity；According to current filter electricity, obtain currently showing the step-length that electricity needs to increase；Root
According to step-length and current display electricity, electricity is shown next time.
Preferably, the fourth processing module is specifically used for:
It is determined in trickle charge stage and/or constant-current charging phase according to current battery level and battery cutoff voltage
The weight of trickle charge stage and/or constant-current charging phase；
After entering constant voltage charging phase, according to the cut-off charging current of current charging current and battery when full electric, determine
The weight of constant voltage charging phase out.
Preferably, the fourth processing module is specifically used for:
Trickle charge stage or perseverance are determined according to following formula in trickle charge stage or constant-current charging phase
The weight in current charge stage:
Weight_cc=(BATvol_cur-BATvol_terminal)/(A-BATvol_terminal)；
Wherein, weight_cc is the weight of trickle charge stage or constant-current charging phase, and BATvol_cur is current electricity
Cell voltage, BATvol_terminal are battery cutoff voltage, and A is the full piezoelectric voltage of constant voltage charging phase setting；
After entering constant voltage charging phase, according to following formula, the weight of constant voltage charging phase is determined:
Weight_cv=(BATi_cur-BATi_terminal)/(BATi_cc-BATi_terminal)；
Wherein, weight_cv is the weight of constant voltage charging phase, and BATi_cur is current charging current, BATi_
Terminal is cut-off charging current when battery is full electric, and BATi_cc is the electric current of constant-current charging phase.
Preferably, the fourth processing module is specifically used for:
In trickle charge stage or constant-current charging phase, according to following formula, to current display electricity and present battery
Electricity is weighted processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cc)+SOCcc_cur*weight_cc
Wherein, SOCfilter_cur is current filter electricity, and SOC_cur is current display electricity, and SOCcc_cur is to work as
Preceding battery capacity, weight_cc are the weight of trickle charge stage or constant-current charging phase；
Into after constant voltage charging phase, according to following formula, current display electricity and current battery charge are weighted
Processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cv)+SOCcv_cur*weight_cv
Wherein, weight_cv is the weight of constant voltage charging phase.
Preferably, the fourth processing module obtains currently showing the step that electricity needs to increase according to current filter electricity
It is long, comprising:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
Preferably, the fourth processing module is specifically used for:
Intermediate display electricity is determined according to following formula in trickle charge stage or constant-current charging phase:
SOC1=g*BATvol_cur+d；
G=(A*k+b-SOC_last)/(A-BATvol_last)；
D=A*k+b-g*A；
K=(SOCfilter_cur-SOCfilter_last)/(BATvol_cur-BATvol_last)；
B=SOCfilter_cur-k*BATvol_cur；
Wherein, SOC1 is intermediate display electricity, and BATvol_cur is current battery level, and BATvol_last is the last time
Cell voltage, A are the full piezoelectric voltage of constant voltage charging phase setting, and SOC_last is last display electricity, SOCfilter_cur
For current filter electricity, SOCfilter_last is last filtering electricity；
Into after constant voltage charging phase, according to following formula, intermediate display electricity is determined:
SOC1=g*BATi_cur+d；
G=(BATi_terminal*k+b-SOC_last)/(BATi_terminal-BATi_last)；
D=BATi_terminal*k+b-g*BATi_terminal；
K=(SOCfilter_cur-SOCfilter_last)/(BATi_cur-BATi_last)；
B=SOCfilter_cur-k*BATi_cur；
Wherein, BATi_cur is current charging current, and BATi_last is last charging current, and BATi_terminal is
Cut-off charging current when battery is full electric.
Preferably, the fourth processing module is shown electricity next time, is wrapped according to step-length and current display electricity
It includes:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length determines the corresponding increment of step-length according to the corresponding relationship of preset step-length and increment for negative value,
And determine show next time electricity be currently show electricity and increment and.
Preferably, the device further include:
Full electro-detection module, for being greater than or equal to setting in current battery charge after entering constant voltage charging phase
When full electricity threshold value, charging circuit is disconnected, and detect current battery level；If current battery level is greater than or equal to constant-voltage charge rank
The full piezoelectric voltage of section setting, and it is sustained for longer than the time interval of setting, determine that current battery charge is full power consumption.
Preferably, the device further include:
End charging current determining module, the current voltage of battery is to set if detecting after for current charge cycle
Fixed full piezoelectric voltage is then based on current expiration charging current in the subsequent charge period to determine current display electricity；If current
It detects that the current voltage of battery is less than the full piezoelectric voltage of setting after charge cycle, the reduction of current expiration charging current is set
Fixed adjustment amount, and after next charge cycle, the current voltage of battery is detected, until detecting the current electricity of battery
Pressure is less than or equal to the cut-off current threshold value of setting for the full piezoelectric voltage or current expiration charging current of setting, in subsequent charge week
Phase is based on current expiration charging current to determine current display electricity.
In method and apparatus provided in an embodiment of the present invention, into after constant-current charging phase, using coulomb metering method, root
According to the battery capacity of the coulomb value currently measured and the initial time that charges, current battery charge is determined；Into constant-voltage charge rank
Duan Hou, using the linear approximate relationship of current battery charge in constant voltage charging phase and charging current, according to current charging current,
Determine current battery charge.Since constant-current charging phase uses coulomb metering method, it can both guarantee the current electricity determined
The accuracy of amount, and the feature that the charging curve that can play coulomb metering method is smooth；After entering constant voltage charging phase, fortune
Current battery charge is calculated with charging current and the linear relationship of current battery charge, can relatively accurately reflect current electricity
The practical electricity in pond, and can guarantee the flatness of charging curve.Also, method provided in an embodiment of the present invention is without test
OCV-SOC curve.
Detailed description of the invention
Fig. 1 is the schematic diagram of the charging voltage and charging current in the charging process of lithium battery；
Fig. 2 is a kind of schematic diagram of the measurement method of battery charge provided in an embodiment of the present invention；
Fig. 3 is constant voltage charging phase in the embodiment of the present invention, the schematic diagram of battery capacity SOCcv and charging current i relationship；
Fig. 4 is to determine in trickle charge stage and constant-current charging phase and constant voltage charging phase in the embodiment of the present invention
The curve graph of actual battery electricity；
Fig. 5 is the display electricity SOC curve graph of entire charge cycle in the embodiment of the present invention；
Fig. 6 is the schematic diagram of the measuring device of the first battery charge provided in an embodiment of the present invention；
Fig. 7 is the schematic diagram of the measuring device of second of battery charge provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of the measuring device of the third battery charge provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of the measuring device of the 4th kind of battery charge provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of the measuring device of the 5th kind of battery charge provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.It should be appreciated that described herein
Embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
A kind of measurement method of battery charge of the embodiment of the present invention, as shown in Fig. 2, this method comprises: trickle charge
Stage, constant-current charge rank and constant voltage charging phase；Wherein:
S21, into after constant-current charging phase, using coulomb metering method, according to the coulomb value currently measured and charge
The battery capacity at moment beginning, determines current battery charge；
S22, into after constant voltage charging phase, according to current charging current, determine current battery charge.
In the embodiment of the present invention, constant-current charging phase according to the coulomb value currently measured and is filled using coulomb metering method
The battery capacity at electrical initiation moment, determines current battery charge；Into after constant voltage charging phase, using in constant voltage charging phase
The linear approximate relationship of current battery charge and charging current determines current battery charge according to current charging current.Due to
Constant-current charging phase uses coulomb metering method, can not only guarantee the accuracy for the current electric quantity determined, but also can play library
The smooth feature of the charging curve of logical sequence metering method；After entering constant voltage charging phase, with charging current and present battery electricity
The linear relationship of amount calculates current battery charge, can relatively accurately reflect the practical electricity of present battery, and can protect
Demonstrate,prove the flatness of charging curve.Also, method provided in an embodiment of the present invention is without testing OCV-SOC curve.
In the embodiment of the present invention, with current battery charge, currently show that electricity, current filter electricity etc. are all made of percentage
Form expression for be illustrated, for example, the actual value that current battery charge is current battery charge takes power consumption
Percentage.But the present invention does not show that the specific representation of electricity, current filter electricity etc. carries out to current battery charge, currently
It limits, can also be indicated using other forms, such as practical charge value.
In the embodiment of the present invention, in a charge cycle, at the measurement moment of each setting, present battery electricity is determined
Amount.
For example, measurement interval can be set, to determine the measurement moment in the charge cycle.For example, being surveyed every 1 second
Amount is primary, after completing survey calculation, updates the display electricity on electronic equipment.
In an implementation, the embodiment of the present invention can not improve the trickle charge stage, i.e., still true using existing way
Determine the current battery charge in trickle charge stage；Implementation as one preferred, the embodiment of the present invention is to trickle charge rank
Section improves, it may be assumed that
In the trickle charge stage, using coulomb metering method, according to the coulomb value and charging initial time currently measured
Battery capacity determines current battery charge.
Based on any of the above-described embodiment, coulomb metering method (also referred to as integration method) is used in S21, according to what is currently measured
The battery capacity of coulomb value and charging initial time, determines current battery charge, specific as follows:
There is such as lower linear in trickle charge stage and/or constant-current charging phase, current battery charge SOCcc and coulomb value Q
Relationship:
SOCcc (Q)=rQ+SOCstart formula 1；
Wherein, SOCcc (Q) is trickle charge stage and/or the calculated current battery charge of constant-current charging phase；Q is
The coulomb value currently measured；R is 1/ battery total capacity；SOCstart is corresponding battery capacity when charging starts.
It should be noted that if there is no hardware Coulomb meter chip in electronic equipment, then can be worked as using Software Integration measurement
Preceding coulomb value.
Based on any of the above-described embodiment, in S22 when entering constant voltage charging phase, according to following formula, determine current
Battery capacity, comprising:
SOCcv(i)=a*i+b formula 2；
Wherein, SOCcvIt (i) is current battery charge, i is current charging current；Coefficient a and coefficient b be according to enter constant pressure
Corresponding cut-off is filled when charging current when the charging stage is with the battery capacity and battery full electricity when entering constant voltage charging phase
Electric current is determined with battery capacity corresponding when reaching cut-off charging current.
Specifically, the charging current of constant voltage charging phase approximate can be seen with the time it is linear, in order to fill into constant pressure
After the electric stage, battery capacity is allowed to increase linearly over time, the functional relation of charging current and battery capacity can be set up, battery
Electricity SOCcv (i) and charging current i regard linear approximate relationship as., can be by two o'clock into after constant pressure section, i.e. (current charging
Electric current, current battery charge) and (cut-off charging current, corresponding battery capacity when reaching cut-off charging current) determine formula
A and b in 2.
Preferably, using the method for self study, by least one charge cycle, determine that cut-off when battery is full electric is filled
Electric current, and current display electricity is determined based on the cut-off charging current determined in the subsequent charge period.Specifically:
If the current voltage for detecting battery after current charge cycle is the full piezoelectric voltage of setting, in subsequent charge
Period is based on current expiration charging current to determine current display electricity；
If detecting that the current voltage of battery is less than the full piezoelectric voltage of setting after current charge cycle, by current expiration
Charging current reduces the adjustment amount of setting, and after next charge cycle, detects the current voltage of battery, until detection
The current voltage of battery is that the full piezoelectric voltage of setting or current expiration charging current are less than or equal to the cut-off current threshold set out
Value is based on current expiration charging current in the subsequent charge period to determine current display electricity.
For example, general battery OCV can reach 4.2V when current charging current reaches cut-off charging current, herein for
It is compatible to arrive a plurality of batteries, it prevents from overcharging, can be arranged according to the battery compared with low capacity, be traditionally arranged to be 0.05C, i.e. battery capacity
0.05, such as 3000mAh, then C is 3000mA, 0.05C 150mA, can be higher for high capacity cell 0.05C, it is therefore assumed that
Enter full electro-detection discovery cell voltage for the first time and be not up to 4.2V, then subtracts cut-off charging current in next charge cycle
Lesser value calculates constant-voltage charge slope of a curve and offset in this charge cycle as new cut-off charging current, with this
Amount.In this way through multiple charge cycles, so that it may which self study saves obtained cut-off charging electricity to suitable cut-off charging current
Stream, the calculating as charge cycle below.
In the embodiment of the present invention, cut-off charging current uses self-learning method, by least one charge cycle, can get
Accurate cut-off current improves software to the compatibility of a plurality of batteries.
Certainly, cut-off charging current can also be obtained by actual measurement, specifically: using any charge cycle as measurement period,
When detecting current battery charge is 99%, current charging current is measured, and using the charging current as ending charging current,
And it is calculated in subsequent charge cycle using the cut-off charging current.
Constant voltage charging phase, battery capacity SOCcv and charging current i relationship are as shown in figure 3, wherein for raising SOCcv's
The value of obtained SOCcv is expanded 1000 times by precision.
In the embodiment of the present invention, the reality determined in trickle charge stage and constant-current charging phase and constant voltage charging phase
Battery capacity SOCcc-cv is as shown in Figure 4.
Based on any of the above-described embodiment, battery capacity SOCcc and currently show between electricity SOC, S22 that S21 is determined
There may be certain deviation between the battery capacity SOCcv and current display electricity SOC determined, it is current aobvious in order to improve
The smoothness for showing electricity SOC curve carries out first-order filtering processing (i.e. weighting processing) to SOC and SOCcc, SOC and SOCcv.Tool
Body are as follows: after S22 further include:
Determine weight；
According to weight, processing is weighted to current display electricity and current battery charge, obtains current filter electricity；
According to current filter electricity, obtain currently showing the step-length that electricity needs to increase；
According to step-length and current display electricity, electricity is shown next time.
In the embodiment of the present invention, according to the weight determined, current display electricity and current battery charge are weighted
Processing, obtains current filter electricity；Further according to current filter electricity, obtain currently showing the step-length that electricity needs to increase；Finally
According to step-length and current display electricity, electricity is shown next time.To handle whole section of charging curve, both ensure that
The flatness of charging curve, and accurately reflect the practical electricity of present battery.
It is carried out separately below from trickle charge stage and/or constant-current charging phase, two stages of constant voltage charging phase detailed
Explanation.Since the trickle charge stage is also to be charged with constant electric current, trickle charge stage and constant-current charging phase
Calculation method it is identical.
One, trickle charge stage and/or constant-current charging phase.
Based on any of the above-described embodiment, trickle charge stage and/or constant-current charging phase determine weight, comprising: according to
Current battery level and battery cutoff voltage determine the weight of trickle charge stage and/or constant-current charging phase.
Specifically, trickle charge stage or constant-current charging phase, according to following formula, determine the trickle charge stage or
The weight of person's constant-current charging phase:
Weight_cc=(BATvol_cur-BATvol_terminal)/(A-BATvol_terminal) formula 3A；
Wherein, weight_cc is the weight of trickle charge stage or constant-current charging phase, and BATvol_cur is current electricity
Cell voltage, BATvol_terminal are battery cutoff voltage, and A is the full piezoelectric voltage of constant voltage charging phase setting.
It should be noted that the weight of trickle charge stage or constant-current charging phase is in addition to that can use above-mentioned preferred side
Formula can also use other methods, for example, the power of fixed configurations trickle charge stage and/or constant-current charging phase outside determining
Value, the i.e. weight of trickle charge stage and/or constant-current charging phase are a fixed numerical value.
Based on any of the above-described embodiment, trickle charge stage or constant-current charging phase, according to following formula, to current aobvious
Show that electricity and current battery charge are weighted processing, obtain current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cc)+SOCcc_cur*weight_cc formula 4A；
Wherein, SOCfilter_cur is current filter electricity, and SOC_cur is current display electricity, and SOCcc_cur is to work as
Preceding battery capacity, weight_cc are the weight of trickle charge stage or constant-current charging phase.
Formula 4A reflects in trickle charge stage or constant-current charge section, when cell voltage is lower, current filter electricity
Currently to show that it is leading that electricity SOC is accounted for, it can guarantee the flatness for showing electric quantity curve in this way；With the lifting of cell voltage,
The specific gravity of current display electricity SOC gradually decreases, and the current battery charge SOCcc finally determined with S21 accounts for leading, works as reality
When cell voltage reaches full piezoelectric voltage (such as 4.2V) of constant voltage charging phase setting, SOCfilter will use SOCcc completely.
Based on any of the above-described embodiment, according to current filter electricity, obtain currently showing the step-length that electricity needs to increase, packet
It includes:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
Specifically, in order to make currently to show the filtered filtering electricity SOCfilter of electricity SOC Step wise approximation, every next round
The step-length that current display electricity SOC needs to increase is determined according to SOCfilter_cur and SOCfilter_last when inquiry, so that
SOC will complete approaching for SOC to SOCfilter in the time interval of setting, and SOC and SOCfilter is finally made to keep one
It causes.
In an implementation, the time interval that trickle charge stage or constant-current charging phase are set is current point in time to constant current
Charging terminates (i.e. cell voltage reaches the full piezoelectric voltage that constant voltage charging phase is set, such as 4.2V).First by the trickle charge stage
Or constant-current charging phase filtering electricity SOCfilter it is approximate with cell voltage BATvol regard linear relationship as, record upper one
Secondary filtering electricity SOCfilter_last and last cell voltage BATvol_last, be denoted as point M (BATvol_last,
SOCfilter_last)；Current filtering electricity SOCfilter_cur and current battery level BATvol_cur are recorded, is denoted as
Point N (BATvol_cur, SOCfilter_cur) determines straight line SOCfilter=k*v+b by point M and point N, and obtains k's and b
Value.Wherein:
K=(SOCfilter_cur-SOCfilter_last)/(BATvol_cur-BATvol_last)；
B=SOCfilter_cur-k*BATvol_cur.
At the end of constant-current charging phase namely cell voltage reaches the full piezoelectric voltage A of constant voltage charging phase setting (such as
Corresponding display electricity is A*k+b, corresponding points P (A, A*k+b) when 4200mv), and by point Q (BATvol_last, SOClast)
It can determine straight line SOC=g*v+d, and the value of g and d be calculated.Wherein:
G=(M*A*k+b-SOC_last)/(M*A-BATvol_last)；
D=A*k+b-g*A.
Therefore, trickle charge stage or constant-current charging phase, the intermediate display electricity determined, as shown in formula 5A:
SOC1=g*BATvol_cur+d formula 5A.
Preferably, according to step-length and current display electricity, electricity is shown next time, comprising:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length determines the corresponding increment of step-length according to the corresponding relationship of preset step-length and increment for negative value,
And determine show next time electricity be currently show electricity and increment and.
Wherein, the corresponding increment of step-length can be 0.
Two, constant voltage charging phase.
Based on any of the above-described embodiment, into after constant voltage charging phase, weight is determined, comprising: according to current charging electricity
Cut-off charging current when stream and full electric battery, determines the weight of constant voltage charging phase.
Specifically, determining the weight of constant voltage charging phase according to following formula:
Weight_cv=(BATi_cur-BATi_terminal)/(BATi_cc-BATi_terminal) formula 3B；
Wherein, weight_cv is the weight of constant voltage charging phase, and BATi_cur is current charging current, BATi_
Terminal is cut-off charging current when battery is full electric, and BATi_cc is the electric current of constant-current charging phase.
It, can be with it should be noted that the weight of constant voltage charging phase be other than it can use above-mentioned preferred embodiment to determine
Other methods are used, for example, the weight of fixed configurations constant voltage charging phase, the i.e. weight of constant voltage charging phase are one fixed
Numerical value.
Based on any of the above-described embodiment, into after constant voltage charging phase, according to following formula, to current display electricity and work as
Preceding battery capacity is weighted processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cv)+SOCcv_cur*weight_cv formula 4B；
Formula 4B reflects into after constant voltage charging phase, and when charging current is higher, current filter electricity is still with current
Display electricity SOC accounts for leading, with the reduction of charging current, shows that electricity can be with current battery charge SOCcv that S22 is determined
Account for it is leading, will be completely using SOCcv as current display electricity when charging current reaches cut-off charging current.
Based on any of the above-described embodiment, according to current filter electricity, obtain currently showing the step-length that electricity needs to increase, packet
It includes:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
In an implementation, the time interval of constant voltage charging phase setting is that current point in time to constant-voltage charge terminates, namely
Charging current reaches cut-off charging current.First by the filtering electricity SOCfilter of constant voltage charging phase and charging current BATi
Approximation regards linear relationship as.Record last filtering electricity SOCfilter_last and last charging current BATi_last, note
Make point A (BATi_last, SOCfilter_last), records current filter electricity SOCfilter_cur and current charging current
BATi_cur is denoted as point B (SOCfilter_cur, BATi_cur), determines straight line SOCfilter=k*i+b by point A and point B,
And obtain the value of k and b.Wherein:
K=(SOCfilter_cur-SOCfilter_last)/(BATi_cur-BATi_last)；
B=SOCfilter_cur-k*BATi_cur.
At the end of constant voltage charging phase, that is, corresponding display electricity is when reaching cut-off current BATi_terminal
BATi_terminal*k+b, corresponding points A (BATi_terminal, BATi_terminal*k+b), but by point B (BATi_last,
SOC_last), it may be determined that straight line SOC=g*v+d.Wherein:
G=(BATi_terminal*k+b-SOC_last)/(BATi_terminal-BATi_last)；
D=BATi_terminal*k+b-g*BATi_terminal；
Wherein, BATi_cur is current charging current, and BATi_last is last charging current, and SOC_last is upper one
Secondary display electricity.
Therefore, into after constant voltage charging phase, determine it is intermediate show electricity, as shown in formula 5B:
SOC1=g*BATi_cur+d formula 5B.
Electricity is shown according to step-length and current display electricity next time based on any of the above-described embodiment, comprising:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length determines the corresponding increment of step-length according to the corresponding relationship of preset step-length and increment for negative value,
And determine show next time electricity be currently show electricity and increment and.
Based on any of the above-described embodiment, into after constant voltage charging phase, this method further include:
When current battery charge is greater than or equal to the full electric threshold value of setting, charging circuit is disconnected, and detect present battery
Voltage；
If current battery level is greater than or equal to the full piezoelectric voltage of constant voltage charging phase setting, and is sustained for longer than and sets
Fixed time interval determines that current battery charge is full power consumption.
Specifically, the full electro-detection stage is in constant voltage charging phase, in close full electric (the i.e. current battery charge of battery capacity
More than or equal to the full electric threshold value of setting) when, it, can be by charging control circuit charger in order to detect battery full power state in time
It disconnects, cell voltage can be approximately OCV at this time, if detecting that cell voltage is more than or equal to the full piezoelectric voltage of setting (such as
4.2V), and the duration is setting time interval (such as 1 minute), then it is assumed that the full electricity of battery, and make to show electricity 100%.
It thereby may be ensured that battery is really full of, battery durable ability can be played to greatest extent with this, extend cruise duration.
By above-mentioned trickle charge stage, constant-current charging phase and constant voltage charging phase, entire charge cycle can be obtained
It shows electricity SOC curve graph, as shown in figure 5, being wherein the precision for improving SOCcv, the value of obtained SOCcv is expanded 1000
Times.
Above method process flow can realize that the software program can store in storage medium with software program, when
When the software program of storage is called, above method step is executed.
Based on the same inventive concept, a kind of measuring device of battery charge is additionally provided in the embodiment of the present invention, by
It is similar to a kind of measurement method of battery charge in the principle that the device solves the problems, such as, therefore the implementation of the device can be joined
The implementation of square method, overlaps will not be repeated.
The embodiment of the invention provides a kind of measuring devices of battery charge, as shown in fig. 6, the device includes:
First processing module 61, for after entering constant-current charging phase, using coulomb metering device, according to currently measuring
Coulomb value and charge initial time battery capacity, determine current battery charge；
Second processing module 62, for according to current charging current, determining current electricity after entering constant voltage charging phase
Pond electricity.
Preferably, as shown in fig. 7, device provided in an embodiment of the present invention further include:
Third processing module 63 is used in the trickle charge stage, using coulomb metering device, according to the coulomb currently measured
The battery capacity of value and charging initial time, determines current battery charge.
Based on any of the above-described embodiment, Second processing module 62 determines current battery charge according to following formula, packet
It includes:
SOCcv(i)=a*i+b；
Wherein, SOCcvIt (i) is current battery charge, i is current charging current；Coefficient a and coefficient b be according to enter constant pressure
Corresponding cut-off is filled when charging current when the charging stage is with the battery capacity and battery full electricity when entering constant voltage charging phase
Electric current is determined with battery capacity corresponding when reaching cut-off charging current.
Based on any of the above-described embodiment, as shown in figure 8, the device further include:
Fourth processing module 64, for determining weight；According to weight, to current display electricity and current battery charge into
Row weighting processing, obtains current filter electricity；According to current filter electricity, obtain currently showing the step-length that electricity needs to increase；
According to step-length and current display electricity, electricity is shown next time.
Preferably, fourth processing module 64 is specifically used for:
It is determined in trickle charge stage and/or constant-current charging phase according to current battery level and battery cutoff voltage
The weight of trickle charge stage and/or constant-current charging phase；
After entering constant voltage charging phase, according to the cut-off charging current of current charging current and battery when full electric, determine
The weight of constant voltage charging phase out.
Preferably, fourth processing module 64 is specifically used for:
Trickle charge stage or perseverance are determined according to following formula in trickle charge stage or constant-current charging phase
The weight in current charge stage:
Weight_cc=(BATvol_cur-BATvol_terminal)/(A-BATvol_terminal)；
Wherein, weight_cc is the weight of trickle charge stage or constant-current charging phase, and BATvol_cur is current electricity
Cell voltage, BATvol_terminal are battery cutoff voltage, and A is the full piezoelectric voltage of constant voltage charging phase setting；
After entering constant voltage charging phase, according to following formula, the weight of constant voltage charging phase is determined:
Weight_cv=(BATi_cur-BATi_terminal)/(BATi_cc-BATi_terminal)；
Wherein, weight_cv is the weight of constant voltage charging phase, and BATi_cur is current charging current, BATi_
Terminal is cut-off charging current when battery is full electric, and BATi_cc is the electric current of constant-current charging phase.
Preferably, fourth processing module 64 is specifically used for:
In trickle charge stage or constant-current charging phase, according to following formula, to current display electricity and present battery
Electricity is weighted processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cc)+SOCcc_cur*weight_cc
Wherein, SOCfilter_cur is current filter electricity, and SOC_cur is current display electricity, and SOCcc_cur is to work as
Preceding battery capacity, weight_cc are the weight of trickle charge stage or constant-current charging phase；
Into after constant voltage charging phase, according to following formula, current display electricity and current battery charge are weighted
Processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cv)+SOCcv_cur*weight_cv
Wherein, weight_cv is the weight of constant voltage charging phase.
Preferably, fourth processing module 64 obtains currently showing the step-length that electricity needs to increase according to current filter electricity,
Include:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
Preferably, fourth processing module 64 is specifically used for:
Intermediate display electricity is determined according to following formula in trickle charge stage or constant-current charging phase:
SOC1=g*BATvol_cur+d；
G=(A*k+b-SOC_last)/(A-BATvol_last)；
D=A*k+b-g*A；
K=(SOCfilter_cur-SOCfilter_last)/(BATvol_cur-BATvol_last)；
B=SOCfilter_cur-k*BATvol_cur；
Wherein, SOC1 is intermediate display electricity, and BATvol_cur is current battery level, and BATvol_last is the last time
Cell voltage, A are the full piezoelectric voltage of constant voltage charging phase setting, and SOC_last is last display electricity, SOCfilter_cur
For current filter electricity, SOCfilter_last is last filtering electricity；
Into after constant voltage charging phase, according to following formula, intermediate display electricity is determined:
SOC1=g*BATi_cur+d；
G=(BATi_terminal*k+b-SOC_last)/(BATi_terminal-BATi_last)；
D=BATi_terminal*k+b-g*BATi_terminal；
K=(SOCfilter_cur-SOCfilter_last)/(BATi_cur-BATi_last)；
B=SOCfilter_cur-k*BATi_cur；
Wherein, BATi_cur is current charging current, and BATi_last is last charging current, and BATi_terminal is
Cut-off charging current when battery is full electric.
Preferably, fourth processing module 64 is shown electricity according to step-length and current display electricity next time, comprising:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length determines the corresponding increment of step-length according to the corresponding relationship of preset step-length and increment for negative value,
And determine show next time electricity be currently show electricity and increment and.
Based on any of the above-described embodiment, as shown in figure 9, the device further include:
Full electro-detection module 65, for being greater than or equal to setting in current battery charge after entering constant voltage charging phase
Full electric threshold value when, disconnect charging circuit, and detect current battery level；If current battery level is greater than or equal to constant-voltage charge
The full piezoelectric voltage of phase sets, and it is sustained for longer than the time interval of setting, determine that current battery charge is full power consumption.
Based on any of the above-described embodiment, as shown in Figure 10, the device further include:
End charging current determining module 66, the current voltage of battery is if detecting after for current charge cycle
The full piezoelectric voltage of setting is then based on current expiration charging current in the subsequent charge period to determine current display electricity；If working as
It detects that the current voltage of battery is less than the full piezoelectric voltage of setting after preceding charge cycle, current expiration charging current is reduced
The adjustment amount of setting, and after next charge cycle, the current voltage of battery is detected, until detecting the current of battery
Voltage is that the full piezoelectric voltage of setting or current expiration charging current are less than or equal to the cut-off current threshold value set, in subsequent charge
Period is based on current expiration charging current to determine current display electricity.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (22)
1. a kind of measurement method of battery charge, which is characterized in that this method comprises: trickle charge stage, constant-current charge
Stage and constant voltage charging phase；Wherein:
Into after constant-current charging phase, using coulomb metering method, according to the coulomb value and charging initial time currently measured
Battery capacity determines current battery charge；
Into after constant voltage charging phase, according to current charging current, current battery charge is determined；
After determining current battery charge, this method further include: the current battery charge determined is carried out at first-order filtering
Reason；
Wherein, first-order filtering processing is carried out to the current battery charge determined, specifically included:
Determine weight；
According to weight, processing is weighted to current display electricity and current battery charge, obtains current filter electricity；
According to current filter electricity, obtain currently showing the step-length that electricity needs to increase；
According to step-length and current display electricity, electricity is shown next time.
2. the method as described in claim 1, which is characterized in that this method comprises:
In the trickle charge stage, using coulomb metering method, according to the battery of the coulomb value currently measured and the initial time that charges
Electricity determines current battery charge.
3. the method as described in claim 1, which is characterized in that when entering constant voltage charging phase, according to following formula, determine
Current battery charge, comprising:
SOCcv(i)=a*i+b；
Wherein, SOCcvIt (i) is current battery charge, i is current charging current；Coefficient a and coefficient b be according to enter constant-voltage charge
The charging current when stage and corresponding cut-off charging when the battery capacity and the full electricity of battery when entering constant voltage charging phase are electric
It flows and determines with corresponding battery capacity when reaching cut-off charging current.
4. the method as described in claim 1, which is characterized in that trickle charge stage and/or constant-current charging phase are determined to weigh
Value, comprising: according to current battery level and battery cutoff voltage, determine trickle charge stage and/or constant-current charging phase
Weight；
Into after constant voltage charging phase, weight is determined, comprising: charge according to the cut-off of current charging current and battery when full electric
Electric current determines the weight of constant voltage charging phase.
5. method as claimed in claim 4, which is characterized in that trickle charge stage or constant-current charging phase, according to as follows
Formula determines the weight of trickle charge stage or constant-current charging phase:
Weight_cc=(BATvol_cur-BATvol_terminal)/(A-BATvol_terminal)；
Wherein, weight_cc is the weight of trickle charge stage or constant-current charging phase, and BATvol_cur is present battery electricity
Pressure, BATvol_terminal are battery cutoff voltage, and A is the full piezoelectric voltage of constant voltage charging phase setting；
After entering constant voltage charging phase, according to following formula, the weight of constant voltage charging phase is determined:
Weight_cv=(BATi_cur-BATi_terminal)/(BATi_cc-BATi_terminal)；
Wherein, weight_cv is the weight of constant voltage charging phase, and BATi_cur is current charging current, and BATi_terminal is
Cut-off charging current when battery is full electric, BATi_cc are the electric current of constant-current charging phase.
6. the method as described in claim 1, which is characterized in that trickle charge stage or constant-current charging phase, according to as follows
Formula is weighted processing to current display electricity and current battery charge, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cc)+SOCcc_cur*weight_cc
Wherein, SOCfilter_cur is current filter electricity, and SOC_cur is current display electricity, and SOCcc_cur is current electricity
Pond electricity, weight_cc are the weight of trickle charge stage or constant-current charging phase；
Into after constant voltage charging phase, according to following formula, processing is weighted to current display electricity and current battery charge,
Obtain current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cv)+SOCcv_cur*weight_cv
Wherein, weight_cv is the weight of constant voltage charging phase.
7. the method as described in claim 1, which is characterized in that according to current filter electricity, obtain currently showing electricity needs
The step-length of growth, comprising:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
8. the method for claim 7, which is characterized in that trickle charge stage or constant-current charging phase, according to as follows
Formula determines intermediate display electricity:
SOC1=g*BATvol_cur+d；
G=(A*k+b-SOC_last)/(A-BATvol_last)；
D=A*k+b-g*A；
K=(SOCfilter_cur-SOCfilter_last)/(BATvol_cur-BATvol_last)；
B=SOCfilter_cur-k*BATvol_cur；
Wherein, SOC1 is intermediate display electricity, and BATvol_cur is current battery level, and BATvol_last is last battery
Voltage, A are the full piezoelectric voltage of constant voltage charging phase setting, and SOC_last is last display electricity, and SOCfilter_cur is to work as
Preceding filtering electricity, SOCfilter_last are last filtering electricity；
Into after constant voltage charging phase, according to following formula, intermediate display electricity is determined:
SOC1=g*BATi_cur+d；
G=(BATi_terminal*k+b-SOC_last)/(BATi_terminal-BATi_last)；
D=BATi_terminal*k+b-g*BATi_terminal；
K=(SOCfilter_cur-SOCfilter_last)/(BATi_cur-BATi_last)；
B=SOCfilter_cur-k*BATi_cur；
Wherein, BATi_cur is current charging current, and BATi_last is last charging current, and BATi_terminal is battery
Cut-off charging current when full electricity.
9. the method as described in claim 1 next time, which is characterized in that according to step-length and current display electricity, shown
Electricity, comprising:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length is negative value, according to the corresponding relationship of preset step-length and increment, the corresponding increment of step-length is determined, and really
Fix primary display electricity be current display electricity and increment and.
10. method according to claim 1 or 2, which is characterized in that after entering constant voltage charging phase, this method further include:
When current battery charge is greater than or equal to the full electric threshold value of setting, charging circuit is disconnected, and detect current battery level；
If current battery level is greater than or equal to the full piezoelectric voltage of constant voltage charging phase setting, and is sustained for longer than setting
Time interval determines that current battery charge is full power consumption.
11. method as claimed in claim 3, which is characterized in that this method further include:
If the current voltage for detecting battery after current charge cycle is the full piezoelectric voltage of setting, in the subsequent charge period
Current expiration charging current is based on to determine current display electricity；
If detecting that the current voltage of battery is less than the full piezoelectric voltage of setting after current charge cycle, current expiration is charged
The adjustment amount of current reduction setting, and after next charge cycle, the current voltage of battery is detected, until detecting electricity
The current voltage in pond is that the full piezoelectric voltage of setting or current expiration charging current are less than or equal to the cut-off current threshold value set,
The subsequent charge period is based on current expiration charging current to determine current display electricity.
12. a kind of measuring device of battery charge, which is characterized in that the device includes:
First processing module is used for after entering constant-current charging phase, using coulomb metering device, according to the coulomb currently measured
The battery capacity of value and charging initial time, determines current battery charge；
Second processing module, for according to current charging current, determining present battery electricity after entering constant voltage charging phase
Amount；
The device further include: fourth processing module, for carrying out first-order filtering processing to the current battery charge determined；
Wherein, the fourth processing module is specifically used for:
Determine weight；According to weight, processing is weighted to current display electricity and current battery charge, obtains current filter
Electricity；According to current filter electricity, obtain currently showing the step-length that electricity needs to increase；Electricity is shown with current according to step-length,
Electricity is shown next time.
13. device as claimed in claim 12, which is characterized in that the device further include:
Third processing module, for according to the coulomb value currently measured and being filled in the trickle charge stage using coulomb metering device
The battery capacity at electrical initiation moment, determines current battery charge.
14. device as claimed in claim 12, which is characterized in that the Second processing module is determined according to following formula
Current battery charge, comprising:
SOCcv(i)=a*i+b；
Wherein, SOCcvIt (i) is current battery charge, i is current charging current；Coefficient a and coefficient b be according to enter constant-voltage charge
The charging current when stage and corresponding cut-off charging when the battery capacity and the full electricity of battery when entering constant voltage charging phase are electric
It flows and determines with corresponding battery capacity when reaching cut-off charging current.
15. device as claimed in claim 12, which is characterized in that the fourth processing module is specifically used for:
Trickle is determined according to current battery level and battery cutoff voltage in trickle charge stage and/or constant-current charging phase
The weight of charging stage and/or constant-current charging phase；
After entering constant voltage charging phase, according to the cut-off charging current of current charging current and battery when full electric, perseverance is determined
Press the weight of charging stage.
16. device as claimed in claim 15, which is characterized in that the fourth processing module is specifically used for:
In trickle charge stage or constant-current charging phase, according to following formula, determine that trickle charge stage or constant current fill
The weight in electric stage:
Weight_cc=(BATvol_cur-BATvol_terminal)/(A-BATvol_terminal)；
Wherein, weight_cc is the weight of trickle charge stage or constant-current charging phase, and BATvol_cur is present battery electricity
Pressure, BATvol_terminal are battery cutoff voltage, and A is the full piezoelectric voltage of constant voltage charging phase setting；
After entering constant voltage charging phase, according to following formula, the weight of constant voltage charging phase is determined:
Weight_cv=(BATi_cur-BATi_terminal)/(BATi_cc-BATi_terminal)；
Wherein, weight_cv is the weight of constant voltage charging phase, and BATi_cur is current charging current, and BATi_terminal is
Cut-off charging current when battery is full electric, BATi_cc are the electric current of constant-current charging phase.
17. device as claimed in claim 12, which is characterized in that the fourth processing module is specifically used for:
In trickle charge stage or constant-current charging phase, according to following formula, to current display electricity and current battery charge
It is weighted processing, obtains current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cc)+SOCcc_cur*weight_cc
Wherein, SOCfilter_cur is current filter electricity, and SOC_cur is current display electricity, and SOCcc_cur is current electricity
Pond electricity, weight_cc are the weight of trickle charge stage or constant-current charging phase；
Into after constant voltage charging phase, according to following formula, processing is weighted to current display electricity and current battery charge,
Obtain current filter electricity:
SOCfilter_cur=SOC_cur* (1-weight_cv)+SOCcv_cur*weight_cv
Wherein, weight_cv is the weight of constant voltage charging phase.
18. device as claimed in claim 12, which is characterized in that the fourth processing module is obtained according to current filter electricity
The step-length for needing to increase to current display electricity, comprising:
According to current filter electricity and last filtering electricity, intermediate display electricity is determined；
Using the difference of intermediate display electricity and current display electricity as step-length.
19. device as claimed in claim 18, which is characterized in that the fourth processing module is specifically used for:
Intermediate display electricity is determined according to following formula in trickle charge stage or constant-current charging phase:
SOC1=g*BATvol_cur+d；
G=(A*k+b-SOC_last)/(A-BATvol_last)；
D=A*k+b-g*A；
K=(SOCfilter_cur-SOCfilter_last)/(BATvol_cur-BATvol_last)；
B=SOCfilter_cur-k*BATvol_cur；
Wherein, SOC1 is intermediate display electricity, and BATvol_cur is current battery level, and BATvol_last is last battery
Voltage, A are the full piezoelectric voltage of constant voltage charging phase setting, and SOC_last is last display electricity, and SOCfilter_cur is to work as
Preceding filtering electricity, SOCfilter_last are last filtering electricity；
Into after constant voltage charging phase, according to following formula, intermediate display electricity is determined:
SOC1=g*BATi_cur+d；
G=(BATi_terminal*k+b-SOC_last)/(BATi_terminal-BATi_last)；
D=BATi_terminal*k+b-g*BATi_terminal；
K=(SOCfilter_cur-SOCfilter_last)/(BATi_cur-BATi_last)；
B=SOCfilter_cur-k*BATi_cur；
Wherein, BATi_cur is current charging current, and BATi_last is last charging current, and BATi_terminal is battery
Cut-off charging current when full electricity.
20. device as claimed in claim 12, which is characterized in that the fourth processing module is according to step-length and current display electricity
Amount, is shown electricity next time, comprising:
If step-length is positive value, determine show next time electricity be currently show electricity and step-length and；
If step-length is negative value, according to the corresponding relationship of preset step-length and increment, the corresponding increment of step-length is determined, and really
Fix primary display electricity be current display electricity and increment and.
21. device as described in claim 12 or 13, which is characterized in that the device further include:
Full electro-detection module, for being greater than or equal to the full electricity of setting in current battery charge after entering constant voltage charging phase
When threshold value, charging circuit is disconnected, and detect current battery level；If current battery level is set more than or equal to constant voltage charging phase
Fixed full piezoelectric voltage, and it is sustained for longer than the time interval of setting, determine that current battery charge is full power consumption.
22. device as claimed in claim 14, which is characterized in that the device further include:
End charging current determining module, the current voltage of battery is setting if detecting after for current charge cycle
Full piezoelectric voltage is then based on current expiration charging current in the subsequent charge period to determine current display electricity；If current charging
It detects that the current voltage of battery is less than the full piezoelectric voltage of setting after end cycle, current expiration charging current is reduced into setting
Adjustment amount, and after next charge cycle, the current voltage of battery is detected, until detecting that the current voltage of battery is
The full piezoelectric voltage or current expiration charging current of setting are less than or equal to the cut-off current threshold value of setting, equal in the subsequent charge period
Current display electricity is determined based on current expiration charging current.
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