CN106970332B - Based on the adaptive charging SOC modification method of feedback - Google Patents
Based on the adaptive charging SOC modification method of feedback Download PDFInfo
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- CN106970332B CN106970332B CN201710308965.0A CN201710308965A CN106970332B CN 106970332 B CN106970332 B CN 106970332B CN 201710308965 A CN201710308965 A CN 201710308965A CN 106970332 B CN106970332 B CN 106970332B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
Abstract
The invention discloses a kind of charging SOC modification method adaptive based on feedback, successively the following steps are included: A, charging initial stage, pre-process respective logic algorithm signal；B, charged state is estimated；C, according to current integration and SOC initial value, real-time estimation SOC；D, calculate in real time charging initially with charging at the end of the SOC difference that needs to fill, calculate adaptive correction parameter；E, is multiplied with corrected parameter revised SOC by the current SOC in real time of feedback, carries out SOC amendment and whether meet normally to correct to judge.The present invention is to be calculated backoff values based on existing battery management system by SOC in quick-charge state and charging, carried out charging SOC corrected parameter estimation.To carry out SOC adaptive correction.The SOC being modified using this method improves charge capacity in entire charging process, maintains the synchronism of SOC and charging in charging process, the user experience is improved.
Description
Technical field
The present invention relates to Vehicular dynamic battery charging fields, and in particular to based on the adaptive amendment side charging SOC of feedback
Method.
Background technique
At present at the end of the quick charge of Vehicular dynamic battery direct current, the practical electricity underfill of battery.In order to promote user's body
It tests, it will usually which the full state for forcing to be modified to 100% is carried out to display electricity, that is, SOC.Currently for SOC amendment, there are following
Two schemes:
The first: after direct current quick charge, directly correcting to 100% from practical electricity full of shape in a short time
State.
Second: before direct current quick charge terminates, corrected in advance to 100% full state and DC charging is waited to terminate.
Above two strategy does not consider the consistency between charging and SOC amendment, leads to the unreasonable charging of battery and use.
Will lead to two problems under the inconsistent scene of single battery according to above two strategy: the first battery capacity is full of, due to
Short time forces amendment, leads the user to believe that and is not full of；2nd SOC is corrected in advance completely, due in the full state residence time
Too long, cause user to terminate in advance charging or think over-charging of battery.
Summary of the invention
SOC process amendment is carried out during real time charging in view of the above-mentioned problems, the invention proposes one kind, and in direct current
SOC is just corrected to the charging SOC modification method adaptive based on feedback of 100% full state at the end of charging.
The technical scheme is that a kind of charging SOC modification method adaptive based on feedback, successively includes following step
It is rapid:
A, it charges the initial stage, to the difference CellUDel and monomer voltage difference CellUDel for needing to be full of monomer voltage
Logical algorithm signal pre-processed；
B, charged state ChrgSt is estimated；
C, according to current integration and SOC initial value, real-time estimation SOC；
D, calculate in real time charging initially with charging at the end of the SOC difference that needs to fill, calculate adaptive correction parameter；
E, SOCLast, the i.e. SOC of feedback calculating are calculated first, add real time charging SOCAH multiplied by adaptive for initial SOC
Corrected parameter SOCPec, i.e. SOCLast=SOCIni+SOCAH*SOCPec are carried out by the SOCLast and SOC of final output
Whether amendment meets normal amendment judgement.
It may further be preferable that further comprising the steps of:
F, the correction value of real-time state-of-charge is shown.
It is even furthermore preferable that further comprising the steps of:
In stepb, if judging CC2 signal first in national standard detection range, power battery is into charged state
ChrgSt=1, otherwise to exit charged state ChrgSt=0；At power battery charging state ChrgSt=2, judge as follows
Whether any one condition meets in three conditions, and meeting then is full state ChrgSt=3, otherwise for just in charged state
ChrgSt=2:
(1) whether current power battery maximum monomer voltage MaxCellU is greater than or equal to full of monomer voltage threshold value
ChrgCellU meets MaxCellU >=ChrgCellU, then be full state ChrgSt=3, be unsatisfactory for, then to fill
Electricity condition ChrgSt=2；
(2) whether total voltage BatU is greater than or equal to full of total voltage threshold value ChrgBatU, that is, meet BatU >=
ChrgBatU is then full state ChrgSt=3, is unsatisfactory for, then for just in charged state ChrgSt=2；
(3) currently whether estimation SOC is greater than or equal to 100%, that is, meets SOC >=100%, be then full state
ChrgSt=3 is unsatisfactory for, then for just in charged state ChrgSt=2.
It is even furthermore preferable that further comprising the steps of:
In step C, real-time estimation SOC is to be integrated total current divided by power battery rated capacity in charging process
Real time charging SOCAH is obtained, in addition charging initial value SOCIni, then SOC when obtaining fully charged, wherein SOC=SOCIni+
SOCAH。
It is even furthermore preferable that further comprising the steps of:
In step D, SOCDel is calculated first, that is, needs the difference full of SOC, is subtracted before charging starts for 100%SOC
Initial value SOCIni, i.e. SOCDel=100%SOC-SOCIni；CellUDel is calculated, that is, needs the difference full of monomer voltage, is
Subtract maximum monomer voltage initial value MaxCellUIni, i.e. CellUDel before charging starts full of monomer voltage threshold value ChrgCellU
=ChrgCellU-MaxCellUIni, wherein SOCIni and MaxCellUIni value pass through charged state process by ChrgSt=0
Become ChrgSt=1 and is read out preservation；
Secondly calculate SOCStep, i.e., per unit cell voltage value, which increases, needs increased SOC value, be SOCDel divided by
CellUDel, i.e. SOCStep=SOCDel/CellUDel；
Last to calculate SOCPec in real time, that is, charge adaptive correction parameter, is SOCStep multiplied by real time charging monomer voltage
Increment (ChrgCellU-MaxCellU), then the parameter, i.e. SOCPec=SOCStep* (ChrgCellU- are obtained divided by SOCAH
MaxCellU)/SOCAH。
It is even furthermore preferable that further comprising the steps of:
In step E, whether the SOCLast for judging that feedback calculates is greater than SOC, the SOC value of final output if setting up
BatSOC is SOCLast, is otherwise kept.
The beneficial effects of the present invention are:
1, the present invention is to calculate feedback by SOC in quick-charge state and charging based on existing battery management system
Value carries out charging SOC corrected parameter estimation.To carry out SOC adaptive correction.The SOC being modified using this method is whole
In a charging process, charge capacity is improved, maintains the synchronism of SOC and charging in charging process, the user experience is improved.
2, the charging time is determined according to the correction value of the real-time state-of-charge of display, reduction overcharges time and number, mentions
High user experience and battery use duration.
Detailed description of the invention
Fig. 1 is control method block schematic illustration in the present invention；
Fig. 2 is input signal processing flow schematic diagram in the present invention；
Fig. 3 is that charged state estimates flow diagram in the present invention；
Fig. 4 is that SOC estimates flow diagram in real time in the present invention；
Fig. 5 is adaptive algorithm flow diagram in the present invention；
Fig. 6 is feedback algorithm flow schematic diagram in the present invention.
Specific embodiment
Technical solution of the present invention is described in detail below, it should be noted that be only of the invention excellent below
Embodiment is selected, it for those of ordinary skill in the art, without departing from the concept of the premise of the invention, can be with
Several modifications and improvements are made, these should belong to protection scope of the present invention.
As shown in figs. 1 to 6, a kind of charging SOC modification method adaptive based on feedback, successively the following steps are included:
A, it charges the initial stage, per unit cell voltage value is increased, increased SOC value SOCStep and needs is needed to be full of
The logical algorithm signal of the difference CellUDel of monomer voltage is pre-processed.
It is calculated for this algorithm requirements signal, calculates total power battery voltage.
B, charged state ChrgSt is estimated.
Charged state estimation, if judging CC2 signal first in national standard detection range, power battery is to enter charging shape
State ChrgSt=1, otherwise to exit charged state ChrgSt=0；At power battery charging state ChrgSt=2, judgement is such as
Whether any one condition meets in lower three conditions, and meeting then is full state ChrgSt=3, otherwise for just in charged state
ChrgSt=2:
(1) whether current power battery maximum monomer voltage MaxCellU is greater than or equal to full of monomer voltage threshold value
ChrgCellU meets MaxCellU >=ChrgCellU, then be full state ChrgSt=3, be unsatisfactory for, then to fill
Electricity condition ChrgSt=2；
(2) whether total voltage BatU is greater than or equal to full of total voltage threshold value ChrgBatU, that is, meet BatU >=
ChrgBatU is then full state ChrgSt=3, is unsatisfactory for, then for just in charged state ChrgSt=2；
(3) currently whether estimation SOC is greater than or equal to 100%, that is, meets SOC >=100%, be then full state
ChrgSt=3 is unsatisfactory for, then for just in charged state ChrgSt=2.More than or equal to being to avoid the occurrence of algorithm and directly calculate to skip
100% this value.
C, according to current integration and SOC initial value, real-time estimation SOC.
Real-time estimation SOC is to be integrated to be filled in real time divided by power battery rated capacity to total current in charging process
Electric SOCAH, in addition charging initial value SOCIni, then SOC when obtaining fully charged, wherein SOC=SOCIni+SOCAH.
D, calculate in real time charging initially with charging at the end of the SOC difference that needs to fill, calculate adaptive correction parameter；
SOCDel is calculated first, that is, needs the difference full of SOC, is subtracted charging for 100%SOC and is started preceding initial value
SOCIni, i.e. SOCDel=100%-SOCIni；CellUDel is calculated, that is, the difference full of monomer voltage is needed, for full of list
Bulk voltage threshold value ChrgCellU subtracts maximum monomer voltage initial value MaxCellUIni, i.e. CellUDel=before charging starts
ChrgCellU-MaxCellUIni, wherein SOCIni and MaxCellUIni value is become by charged state process by ChrgSt=0
Preservation is read out for ChrgSt=1.
Secondly calculate SOCStep, i.e., per unit cell voltage value, which increases, needs increased SOC value, be SOCDel divided by
CellUDel, i.e. SOCStep=SOCDel/CellUDel.
Last to calculate SOCPec in real time, that is, charge adaptive correction parameter, is SOCStep multiplied by real time charging monomer voltage
Increment (ChrgCellU-MaxCellU), then the parameter, i.e. SOCPec=SOCStep* (ChrgCellU- are obtained divided by SOCAH
MaxCellU)/SOCAH。
E, SOCLast, the i.e. SOC of feedback calculating are calculated first, add real time charging SOCAH multiplied by adaptive for initial SOC
Corrected parameter SOCPec, i.e. SOCLast=SOCIni+SOCAH*SOCPec are carried out by the SOCLast and SOC of final output
Whether amendment meets normal amendment judgement.
Judged again, since auto-adaptive parameter judgement can be in actual current variation and monomer voltage variation appearance
Lower floating causes the SOC of the parameters revision that can decline during the charging process.Therefore it is by the SOCLast for judging that feedback calculates
No to be greater than SOC, the SOC value BatSOC of final output is SOCLast if setting up, and is otherwise kept.
The present invention is to calculate backoff values by SOC in quick-charge state and charging based on existing battery management system,
Carry out charging SOC corrected parameter estimation.To carry out SOC adaptive correction.The SOC being modified using this method is entirely being filled
In electric process, charge capacity is improved, maintains the synchronism of SOC and charging in charging process, the user experience is improved.
The charging time is determined according to the correction value of the real-time state-of-charge of display, and reduction overcharges time and number, improves
User experience and battery use duration.
It may further be preferable that further comprising the steps of:
F, the correction value of real-time state-of-charge is shown.
The charging time is determined according to the correction value of the real-time state-of-charge of display, and reduction overcharges time and number, improves
User experience and battery use duration.
Technical solution of the present invention can be preferably realized according to the record of this specification.
Claims (5)
1. a kind of charging SOC modification method adaptive based on feedback, which is characterized in that successively the following steps are included:
A, it charges the initial stage, per unit cell voltage value is increased and needs increased SOC value SOCStep and needs full of monomer
The logical algorithm signal of the difference CellUDel of voltage is pre-processed；
B, charged state ChrgSt is estimated；
C, according to current integration and SOC initial value, real-time estimation SOC；
D, calculate in real time charging initially with charging at the end of the SOC difference that needs to fill, calculate adaptive correction parameter；It calculates first
SOCDel needs the difference full of SOC, subtract initial value SOCIni, i.e. SOCDel=100% before charging starts for 100%SOC
SOC-SOCIni；CellUDel is calculated, that is, the difference full of monomer voltage is needed, for full of monomer voltage threshold value ChrgCellU
Subtract maximum monomer voltage initial value MaxCellUIni, i.e. CellUDel=ChrgCellU-MaxCellUIni before charging starts,
Wherein SOCIni and MaxCellUIni value become ChrgSt=1 from ChrgSt=0 by charged state process and are read out guarantor
It deposits；Secondly calculate SOCStep, i.e., per unit cell voltage value, which increases, needs increased SOC value, be SOCDel divided by
CellUDel, i.e. SOCStep=SOCDel/CellUDel；Last to calculate SOCPec in real time, that is, charge adaptive correction parameter,
The parameter is obtained multiplied by real time charging monomer voltage increment (ChrgCellU-MaxCellU), then divided by SOCAH for SOCStep,
That is SOCPec=SOCStep* (ChrgCellU-MaxCellU)/SOCAH；
E, SOCLast, the i.e. SOC of feedback calculating are calculated, adds real time charging SOCAH multiplied by adaptive correction parameter for initial SOC
SOCPec, i.e. SOCLast=SOCIni+SOCAH*SOCPec, by the SOC of SOCLast and final output be modified whether
Meet normal amendment judgement.
2. the charging SOC modification method adaptive based on feedback according to claim 1, which is characterized in that further include with
Lower step:
F, the correction value of real-time state-of-charge is shown.
3. the charging SOC modification method adaptive based on feedback according to claim 1 or 2, which is characterized in that in step
In B, if judging CC2 signal first in national standard detection range, into charged state ChrgSt=1, otherwise power battery is
To exit charged state ChrgSt=0；At power battery charging state ChrgSt=2, judge any in following three condition
Whether one condition meets, and meeting then is full state ChrgSt=3, otherwise for just in charged state ChrgSt=2:
(1) whether current power battery maximum monomer voltage MaxCellU is greater than or equal to full of monomer voltage threshold value
ChrgCellU meets MaxCellU >=ChrgCellU, then be full state ChrgSt=3, be unsatisfactory for, then to fill
Electricity condition ChrgSt=2；
(2) whether total voltage BatU is greater than or equal to full of total voltage threshold value ChrgBatU, that is, meets BatU >=ChrgBatU,
It is then full state ChrgSt=3, is unsatisfactory for, then for just in charged state ChrgSt=2；
(3) currently whether estimation SOC is greater than or equal to 100%, that is, meets SOC >=100%, be then full state ChrgSt=
3, it is unsatisfactory for, then for just in charged state ChrgSt=2.
4. the charging SOC modification method adaptive based on feedback according to claim 3, which is characterized in that in step C
In, real-time estimation SOC is to be integrated to obtain real time charging divided by power battery rated capacity to total current in charging process
SOCAH, in addition charging initial value SOCIni, then SOC when obtaining fully charged, wherein SOC=SOCIni+SOCAH.
5. the charging SOC modification method adaptive based on feedback according to claim 4, which is characterized in that in step E
In, whether the SOCLast for judging that feedback calculates is greater than SOC, and the SOC value BatSOC of final output is SOCLast if setting up, no
Then keep.
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| CN108248427B (en) * | 2018-01-15 | 2021-01-01 | 上海中科深江电动车辆有限公司 | Method for dynamically correcting SOC error |
| CN108790876B (en) * | 2018-06-06 | 2020-08-04 | 北京新能源汽车股份有限公司 | Method and device for adjusting feedback power of electric automobile and automobile |
| CN109239608B (en) * | 2018-08-10 | 2021-01-19 | 力高(山东)新能源技术有限公司 | Method for correcting SOC-OCV curve of lithium battery in real time |
| CN109149689B (en) * | 2018-08-27 | 2021-03-30 | 出门问问信息科技有限公司 | Wireless charging method and device |
| CN109633451B (en) * | 2018-12-19 | 2021-05-28 | 东莞钜威动力技术有限公司 | Energy storage system self-track parameter calibration method and SOC estimation method |
| CN113671388B (en) * | 2021-08-12 | 2023-07-04 | 清华大学深圳国际研究生院 | Method for calculating overcharge time of electric automobile |
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