CN106483471B - Cell health state evaluation method and system under a kind of whole vehicle state - Google Patents
Cell health state evaluation method and system under a kind of whole vehicle state Download PDFInfo
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- CN106483471B CN106483471B CN201710002134.0A CN201710002134A CN106483471B CN 106483471 B CN106483471 B CN 106483471B CN 201710002134 A CN201710002134 A CN 201710002134A CN 106483471 B CN106483471 B CN 106483471B
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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Abstract
The invention discloses the cell health state evaluation methods and system under a kind of whole vehicle state, which comprises S1, obtains charging capacity information of the battery pack in current charging process；S2, the actual capacity information for obtaining battery pack, and target actual capacity information corresponding with voltage range in current charging process；S3, estimated capacity information of the battery pack in current charging process is determined according to charging capacity information, actual capacity information and target actual capacity information；S4, using the estimated capacity information in the estimated capacity information and preceding n times charging process in current charging process, calculate the final actual capacity information of battery pack；Wherein, N is positive integer；S5, the current cell health state of battery pack is determined according to the rated capacity information of final actual capacity information and battery pack；As it can be seen that in the present embodiment, can accurately reflect battery current health state by battery actual capacity, further promote the safe handling of lithium ion battery.
Description
Technical field
The present invention relates to the technical field of lithium ion of new-energy automobile, more specifically to a kind of whole vehicle state
Under cell health state evaluation method and system.
Background technique
Electric car has the advantages that low noise, almost zero-emission, comprehensive energy utilization etc. are prominent, is current solution energy
The important channel of the problems such as source, environmental protection, undoubtedly becomes the developing direction in auto industry future.As lithium ion battery is in new energy
Extensive use on automobile, cell health state (State of Health, SOH) is more and more by industry and science
The concern on boundary.Environment temperature, charging and discharging currents, charging mechanism and charge and discharge blanking voltage can impact SOH, Ge Geying
The factor of sound is a current Research Challenges to quantitative effect caused by battery performance decline and the coupled relation between them,
For pure electric vehicle, capacity can be considered the deciding factor of health state of lithium ion battery.
Therefore, the health status that present battery how is reacted based on battery actual capacity, is those skilled in the art's needs
It solves the problems, such as.
Summary of the invention
The purpose of the present invention is to provide the cell health state evaluation methods and system under a kind of whole vehicle state, to realize
Accurate reflection battery current health state, further promotes the safe handling of lithium ion battery.
To achieve the above object, the embodiment of the invention provides following technical solutions:
A kind of cell health state evaluation method under whole vehicle state, comprising:
S1, charging capacity information of the battery pack in current charging process is obtained；
S2, obtain actual capacity information during the battery pack primary charging, and in the current charging process
The corresponding target actual capacity information of voltage range；
S3, institute is determined according to the charging capacity information, the actual capacity information and the target actual capacity information
State estimated capacity information of the battery pack in current charging process；
S4, believed using the estimated capacity in the estimated capacity information and preceding n times charging process in the current charging process
Breath, calculates the final actual capacity information of the battery pack；Wherein, N is positive integer；
S5, determine that the battery pack is worked as according to the rated capacity information of the final actual capacity information and the battery pack
Preceding cell health state.
Wherein, before execution S1, further includes:
Whether the parking time of detection vehicle before charge is greater than scheduled time threshold value；
If so, detecting vehicle charging capacity information during the charging process and the ratio of rated capacity information is greater than
Predetermined threshold；If more than the predetermined threshold, then S1 is executed.
Wherein, after execution S3 before execution S4, further includes:
Judge the difference of the estimated capacity information in current charging process and the estimated capacity information in last charging process
Whether value is in normal fluctuation range, if so, continuing to execute S4.
Wherein, before execution S1, comprising:
When first used, the battery pack is discharged to blanking voltage, and after the static scheduled time threshold value, it is right
The battery pack carries out primary charging；
Charging capacity information of battery pack during primary charging is obtained as the actual capacity information；
Normal voltage range of battery pack during primary charging is obtained, and the normal voltage range is divided into
M sub- voltage ranges obtain the corresponding segmentation actual capacity information of every sub- voltage range, wherein M is positive integer.
Wherein, the S2 includes:
Obtain the actual capacity information；
If voltage range and m sub- voltage range institutes in the M sub- voltage ranges are right in the current charging process
It answers, then by the sum of corresponding segmentation actual capacity information of the sub- voltage range of the m, as the target actual capacity information；
Wherein, m is the positive integer no more than M；
If the voltage range in the current charging process includes: n son electricity corresponding with the M sub- voltage ranges
Press range, and non-corresponding voltage range not corresponding with sub- voltage range, then by the corresponding segmentation reality of the n sub- voltage ranges
The sum of border capacity information, as first object actual capacity information；Wherein, n is the positive integer less than M；
The sub- voltage range of association corresponding with the non-corresponding voltage range is obtained, according to linear interpolation algorithm and the pass
Join sub- voltage range, the second target actual capacity information corresponding with the non-corresponding voltage range is determined, by first mesh
The sum of actual capacity information and the second target actual capacity information is marked as the target actual capacity information.
Wherein, the S3 includes:
Utilize estimated capacity computation rule: Cest=Cp* [Cap '/Cap] determines the battery pack in current charging process
In estimated capacity information Cest；Wherein, Cap ' is charging capacity information, and Cap is target actual capacity information, and Cp is practical holds
Measure information.
Wherein, the S5 includes:
According to cell health state computation rule: SOH=Creal/Cstandard*100% calculates cell health state
SOH；Wherein, Creal is final actual capacity information, and Cstandard is rated capacity information.
A kind of cell health state estimating system under whole vehicle state, comprising:
First obtains module, for obtaining charging capacity information of the battery pack in current charging process；
Second obtains module, for obtaining the actual capacity information of the battery pack, and in the current charging process
The corresponding target actual capacity information of voltage range；
Estimated capacity determining module, for according to the charging capacity information, the actual capacity information and the target
Actual capacity information determines estimated capacity information of the battery pack in current charging process；
Final actual capacity determining module, for utilizing the estimated capacity information and preceding n times in the current charging process
Estimated capacity information in charging process calculates the final actual capacity information of the battery pack；Wherein, N is positive integer；
Cell health state determining module, for the specified appearance according to the final actual capacity information and the battery pack
Amount information determines the current cell health state of the battery pack.
Wherein, further includes:
First detection module, for detecting whether the parking time of vehicle before charge is greater than scheduled time threshold value；If
It is then to trigger the second detection module；
Second detection module, for detecting the charging capacity information and rated capacity of the vehicle during the charging process
The ratio of information is greater than predetermined threshold；If more than the predetermined threshold, then triggers described first and obtain module.
Wherein, further includes:
Judgment module, the final actual capacity for calculating the battery pack in the final actual capacity determining module are believed
Before breath, the difference of the estimated capacity information in current charging process and the estimated capacity information in last charging process is judged
Whether in normal fluctuation range, if so, the triggering final actual capacity determining module.
By above scheme it is found that cell health state estimation side under a kind of whole vehicle state provided in an embodiment of the present invention
Method and system, which comprises S1, obtain charging capacity information of the battery pack in current charging process；Described in S2, acquisition
Actual capacity information during battery pack primary charging, and target corresponding with voltage range in the current charging process are real
Border capacity information；S3, it is determined according to the charging capacity information, the actual capacity information and the target actual capacity information
Estimated capacity information of the battery pack in current charging process；S4, the estimated capacity in the current charging process is utilized
Estimated capacity information in information and preceding n times charging process calculates the final actual capacity information of the battery pack；Wherein, N is
Positive integer；S5, determine that the battery pack is worked as according to the rated capacity information of the final actual capacity information and the battery pack
Preceding cell health state；As it can be seen that in the present embodiment, can accurately reflect battery current health by battery actual capacity
State further promotes the safe handling of lithium ion 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 only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the cell health state evaluation method process signal under a kind of whole vehicle state disclosed by the embodiments of the present invention
Figure；
Fig. 2 fills for 0.1V monomer voltage correspondence every during battery original state AC charging disclosed by the embodiments of the present invention
Capacitance schematic diagram；
Fig. 3 is the cell health state estimating system structural representation under a kind of whole vehicle state disclosed by the embodiments of the present invention
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses the cell health state evaluation methods and system under a kind of whole vehicle state, to realize essence
True reflection battery current health state further promotes the safe handling of lithium ion battery.
Cell health state evaluation method referring to Fig. 1, under a kind of whole vehicle state provided in an embodiment of the present invention, comprising:
S1, charging capacity information of the battery pack in current charging process is obtained；
Wherein, before execution S1, further includes:
Whether the parking time of detection vehicle before charge is greater than scheduled time threshold value；
If so, detecting vehicle charging capacity information during the charging process and the ratio of rated capacity information is greater than
Predetermined threshold；If more than the predetermined threshold, then S1 is executed.
Specifically, in the present embodiment, parking time >=T before AC charging only on vehicle, and guarantee charging process Δ
SOC=charging capacity/rated capacity >=50% just executes this programme.
Wherein, before executing S1, comprising:
When first used, the battery pack is discharged to blanking voltage, and after the static scheduled time threshold value, it is right
The battery pack carries out primary charging；
Charging capacity information of battery pack during primary charging is obtained as the actual capacity information；
Normal voltage range of battery pack during primary charging is obtained, and the normal voltage range is divided into
M sub- voltage ranges obtain the corresponding segmentation actual capacity information of every sub- voltage range, wherein M is positive integer.
Specifically, in the present embodiment, battery pack can be discharged to cut-off according to relevant criterion by the battery pack used for the first time
Start to carry out AC charging after voltage and time of repose T；Assuming that minimum monomer voltage started to charge at the end of from 3.5V it is minimum
Monomer voltage is 4.2V, then the normal voltage range in this programme is are as follows: 3.5V-4.2V, the then M being divided into a sub- voltage ranges are i.e.
For this 7 sub- voltage ranges of 3.5V-3.6V, 3.6V-3.7V ... 4.1V-4.2V, every 0.1V within the scope of 3.5V-4.2V is calculated
It is respectively C1-C7 that voltage, which corresponds to charging capacity:
3.5V-3.6V corresponding charging capacity C1；
3.6V-3.7V corresponding charging capacity C2；
3.7V-3.8V corresponding charging capacity C3；
3.8V-3.9V corresponding charging capacity C4；
3.9V-4.0V corresponding charging capacity C5；
4.0V-4.1V corresponding charging capacity C6；
4.1V-4.2V corresponding charging capacity C7；
Wherein actual capacity information: Cp=C1+C2+C3+C4+C5+C6+C7.Referring to fig. 2, it is exchanged for battery original state
Every 0.1V monomer voltage corresponds to charging capacity schematic diagram in charging process.
S2, obtain actual capacity information during the battery pack primary charging, and in the current charging process
The corresponding target actual capacity information of voltage range；
Based on the above-mentioned technical proposal, the S2 includes:
Obtain the actual capacity information；
If voltage range and m sub- voltage range institutes in the M sub- voltage ranges are right in the current charging process
It answers, then by the sum of corresponding segmentation actual capacity information of the sub- voltage range of the m, as the target actual capacity information；
Wherein, m is the positive integer no more than M；
If the voltage range in the current charging process includes: n son electricity corresponding with the M sub- voltage ranges
Press range, and non-corresponding voltage range not corresponding with sub- voltage range, then by the corresponding segmentation reality of the n sub- voltage ranges
The sum of border capacity information, as first object actual capacity information；Wherein, n is the positive integer less than M；
The sub- voltage range of association corresponding with the non-corresponding voltage range is obtained, according to linear interpolation algorithm and the pass
Join sub- voltage range, the second target actual capacity information corresponding with the non-corresponding voltage range is determined, by first mesh
The sum of actual capacity information and the second target actual capacity information is marked as the target actual capacity information.
Specifically, assuming that charging starting minimum voltage is exactly 3.7V, voltage range 3.7V- in current charging process
4.2V, it is assumed that then to correspond to charging capacity as follows for every 0.1V voltage in range:
3.7V-3.8V, corresponding charging capacity C3 '；
3.8V-3.9V, corresponding charging capacity C4 '；
3.9V-4.0V, corresponding charging capacity C5 '；
4.0V-4.1V, corresponding charging capacity C6 '；
4.1V-4.2V, corresponding charging capacity C7 '；
As can be seen that voltage range and 5 sub- voltage ranges in 7 sub- voltage ranges are right in current charging process
It answers, is 3.7V-3.8V, 3.8V-3.9V ... 4.1V-4.2V respectively, then the corresponding segmentation actual capacity of this 5 sub- voltage ranges
The sum of information is the target actual capacity information, i.e., target actual capacity is Cap=C3+C4+C5+C6+C7, similarly, when
Charging capacity information Cap '=C3 '+C4 '+C5 '+C6 '+C7 ' in preceding charging process；
Assuming that charging starting minimum voltage between 3.7-3.8V, ceiling voltage 4.2V, then with described 7 sub- voltage models
Corresponding sub- voltage range in enclosing are as follows: this 4 sub- voltage ranges of 3.8V-3.9V ... 4.1V-4.2V, with the 7 sub- voltage
Voltage of the sub- voltage range of non-corresponding between 3.7-3.8V in range, so finding out the first mesh of corresponding sub- voltage first
Mark actual capacity information: Cap=C4+C5+C6+C7；C3-4 is calculated further according to linear interpolation, then the target finally found out is practical
Capacity is Cap=C3-4+C4+C5+C6+C7；Similarly, charging capacity information Cap '=C3-4 '+C4 ' in current charging process+
C5’+C6’+C7’。
S3, institute is determined according to the charging capacity information, the actual capacity information and the target actual capacity information
State estimated capacity information of the battery pack in current charging process；
Wherein, the S3 includes:
Utilize estimated capacity computation rule: Cest=Cp* [Cap '/Cap] determines the battery pack in current charging process
In estimated capacity information Cest；Wherein, Cap ' is charging capacity information, and Cap is target actual capacity information, and Cp is practical holds
Measure information.
Specifically, according to described above, it can be seen that charging starting minimum voltage is exactly 3.7V in current charging process,
When voltage range is 3.7V-4.2V, estimated capacity information Cest=Cp* [Cap '/(C3+C4+C5+C6+C7)；Currently charged
Charging starting minimum voltage is between 3.7-3.8V in journey, when ceiling voltage is 4.2V, estimated capacity information Cest=Cp*
[Cap′/(C3-4+C4+C5+C6+C7)。
S4, believed using the estimated capacity in the estimated capacity information and preceding n times charging process in the current charging process
Breath, calculates the final actual capacity information of the battery pack；Wherein, N is positive integer；
Wherein, after execution S3 before execution S4, further includes:
Judge the difference of the estimated capacity information in current charging process and the estimated capacity information in last charging process
Whether value is in normal fluctuation range, if so, continuing to execute S4.
Specifically, gliding smoothing filtering is carried out to estimated capacity in the present embodiment, i.e., the estimation in current charging process
When capacity C est is differed between Δ Cp with the result of last final actual capacity Creal, S4 can be just executed, to 10 dimension groups
In estimated capacity value carry out gliding smoothing filtering update, mean value is taken to the estimated capacity of screening, is regarded as the final reality of battery pack
Border capacity information Creal:
Creal=(Cest1+Cest2+Cest3+Cest4+Cest5+Cest6+Cest7+Cest8+Cest9+
Cest10)/10。
S5, determine that the battery pack is worked as according to the rated capacity information of the final actual capacity information and the battery pack
Preceding cell health state.
Wherein, the S5 includes:
According to cell health state computation rule: SOH=Creal/Cstandard*100% calculates cell health state
SOH；Wherein, Creal is final actual capacity information, and Cstandard is rated capacity information.
Specifically, establishing battery actual capacity and health status relationship, estimation on line cell health state is estimated according to being
The ratio of the battery actual capacity Creal and battery rated capacity Cstandard of calculation are as SOH (cell health state)；SOH=
Creal/Cstandard*100%；
It in summary it can be seen, this programme finally establishes battery by identifying that specific charging process carries out battery capacity estimation
Actual capacity and health status relationship, accurately reflect battery current health state by battery actual capacity, further promote
The safe handling of lithium ion battery.
Cell health state estimating system provided in an embodiment of the present invention is introduced below, battery described below is strong
Health state estimation system can be cross-referenced with above-described cell health state evaluation method.
Cell health state estimating system referring to Fig. 3, under a kind of whole vehicle state provided in an embodiment of the present invention, comprising:
First obtains module 100, for obtaining charging capacity information of the battery pack in current charging process；
Second obtains module 200, for obtaining the actual capacity information during the battery pack primary charging, and with institute
State the corresponding target actual capacity information of voltage range in current charging process；
Estimated capacity determining module 300, for according to the charging capacity information, the actual capacity information and the mesh
Mark actual capacity information determines estimated capacity information of the battery pack in current charging process；
Final actual capacity determining module 400, for utilizing estimated capacity information and preceding N in the current charging process
Estimated capacity information in secondary charging process calculates the final actual capacity information of the battery pack；Wherein, N is positive integer；
Cell health state determining module 500, for the volume according to final the actual capacity information and the battery pack
Constant volume information determines the current cell health state of the battery pack.
Based on the above-mentioned technical proposal, this programme further include:
First detection module, for detecting whether the parking time of vehicle before charge is greater than scheduled time threshold value；If
It is then to trigger the second detection module；
Second detection module, for detecting the charging capacity information and rated capacity of the vehicle during the charging process
The ratio of information is greater than predetermined threshold；If more than the predetermined threshold, then triggers described first and obtain module.
Based on the above-mentioned technical proposal, this programme further include:
Judgment module, the final actual capacity for calculating the battery pack in the final actual capacity determining module are believed
Before breath, the difference of the estimated capacity information in current charging process and the estimated capacity information in last charging process is judged
Whether in normal fluctuation range, if so, the triggering final actual capacity determining module.
Cell health state evaluation method and system under a kind of whole vehicle state provided in an embodiment of the present invention, the method
Include: S1, obtain charging capacity information of the battery pack in current charging process；S2, the battery pack primary charging is obtained
Actual capacity information in journey, and target actual capacity information corresponding with voltage range in the current charging process；S3, root
Determine the battery pack current according to the charging capacity information, the actual capacity information and the target actual capacity information
Estimated capacity information in charging process；S4, using in the current charging process estimated capacity information and preceding n times charged
Estimated capacity information in journey calculates the final actual capacity information of the battery pack；Wherein, N is positive integer；S5, according to institute
The rated capacity information for stating final actual capacity information and the battery pack determines the current cell health state of the battery pack；
As it can be seen that in the present embodiment, can accurately reflect battery current health state by battery actual capacity, further promote lithium
The safe handling of ion battery.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. the cell health state evaluation method under a kind of whole vehicle state characterized by comprising
S1, charging capacity information of the battery pack in current charging process is obtained；
S2, obtain actual capacity information during the battery pack primary charging, and with voltage in the current charging process
The corresponding target actual capacity information of range；Wherein, the normal voltage range by the battery pack during primary charging point
For M sub- voltage ranges, every sub- voltage range is corresponding with segmentation actual capacity information, the sum of all segmentation actual capacity information
For the actual capacity information；By the sum of segmentation actual capacity information corresponding with the voltage range in the current charging process
As the target actual capacity information；Wherein, M is positive integer；
S3, the electricity is determined according to the charging capacity information, the actual capacity information and the target actual capacity information
Estimated capacity information of the Chi Bao in current charging process；Wherein, the S3 includes: to utilize estimated capacity computation rule: Cest
=Cp* [Cap '/Cap] determines estimated capacity information Cest of the battery pack in current charging process；Wherein, Cap ' is
Charging capacity information, Cap are target actual capacity information, and Cp is actual capacity information；
S4, the estimated capacity information in the estimated capacity information and preceding n times charging process in the current charging process, meter are utilized
Calculate final actual capacity information of the mean value as the battery pack of all estimated capacity information；Wherein, N is positive integer；
S5, determine that the battery pack is current according to the rated capacity information of the final actual capacity information and the battery pack
Cell health state.
2. cell health state evaluation method according to claim 1, which is characterized in that before execution S1, further includes:
Whether the parking time of detection vehicle before charge is greater than scheduled time threshold value；
If so, detecting the charging capacity information of the vehicle during the charging process and whether the ratio of rated capacity information is greater than
Predetermined threshold；If more than the predetermined threshold, then S1 is executed.
3. cell health state evaluation method according to claim 2, which is characterized in that execute S3 after execute S4 it
Before, further includes:
Judging estimated capacity information and the difference of the estimated capacity information in last charging process in current charging process is
It is no in normal fluctuation range, if so, continuing to execute S4.
4. cell health state evaluation method according to claim 1, which is characterized in that before execution S1, comprising:
When first used, the battery pack is discharged to blanking voltage, and after static scheduled time threshold value, to the battery
Packet carries out primary charging；
Charging capacity information of battery pack during primary charging is obtained as the actual capacity information；
Normal voltage range of battery pack during primary charging is obtained, and the normal voltage range is divided into M
Sub- voltage range obtains the corresponding segmentation actual capacity information of every sub- voltage range, wherein M is positive integer.
5. cell health state evaluation method according to claim 4, which is characterized in that the S2 includes:
Obtain the actual capacity information；
If corresponding to m sub- voltage ranges in the current charging process in voltage range and the M sub- voltage ranges,
By the sum of corresponding segmentation actual capacity information of the sub- voltage range of the m, as the target actual capacity information；Wherein, m
For the positive integer no more than M；
If the voltage range in the current charging process includes: and corresponding n sub- voltage models in the M sub- voltage ranges
It encloses, and non-corresponding voltage range not corresponding with sub- voltage range, then by the practical appearance of the corresponding segmentation of the sub- voltage range of the n
The sum of information is measured, as first object actual capacity information；Wherein, n is the positive integer less than M；
The sub- voltage range of association corresponding with the non-corresponding voltage range is obtained, son is associated with described according to linear interpolation algorithm
Voltage range determines the second target actual capacity information corresponding with the non-corresponding voltage range, and the first object is real
The sum of border capacity information and the second target actual capacity information is as the target actual capacity information.
6. cell health state evaluation method described in any one of -5 according to claim 1, which is characterized in that the S5 packet
It includes:
According to cell health state computation rule: SOH=Creal/Cstandard*100% calculates cell health state SOH；
Wherein, Creal is final actual capacity information, and Cstandard is rated capacity information.
7. the cell health state estimating system under a kind of whole vehicle state characterized by comprising
First obtains module, for obtaining charging capacity information of the battery pack in current charging process；
Second obtains module, for obtaining the actual capacity information during the battery pack primary charging, and with it is described current
The corresponding target actual capacity information of voltage range in charging process；Wherein, by the battery pack during primary charging
Normal voltage range is divided into M sub- voltage ranges, and every sub- voltage range is corresponding with segmentation actual capacity information, and all segmentations are real
The sum of border capacity information is the actual capacity information；Segmentation corresponding with the voltage range in the current charging process is real
The sum of border capacity information is used as the target actual capacity information；Wherein, M is positive integer；
Estimated capacity determining module, for practical according to the charging capacity information, the actual capacity information and the target
Capacity information determines estimated capacity information of the battery pack in current charging process；Wherein, the estimated capacity determines mould
Block is specifically used for utilizing estimated capacity computation rule:
Cest=Cp* [Cap '/Cap] determines estimated capacity information Cest of the battery pack in current charging process；Its
In, Cap ' is charging capacity information, and Cap is target actual capacity information, and Cp is actual capacity information；Final actual capacity determines
Module, for utilizing the estimated capacity information in the estimated capacity information and preceding n times charging process in the current charging process,
Calculate final actual capacity information of the mean value as the battery pack of all estimated capacity information；Wherein, N is positive integer；
Cell health state determining module, for being believed according to the rated capacity of the final actual capacity information and the battery pack
Breath determines the current cell health state of the battery pack.
8. cell health state estimating system according to claim 7, which is characterized in that further include:
First detection module, for detecting whether the parking time of vehicle before charge is greater than scheduled time threshold value；If so,
Trigger the second detection module；
Second detection module, for detecting the charging capacity information of the vehicle during the charging process and rated capacity information
Ratio whether be greater than predetermined threshold；If more than the predetermined threshold, then triggers described first and obtain module.
9. cell health state estimating system according to claim 8, which is characterized in that further include:
Judgment module, for calculated in the final actual capacity determining module battery pack final actual capacity information it
Before, judge estimated capacity information in current charging process and the estimated capacity information in last charging process difference whether
In normal fluctuation range, if so, the triggering final actual capacity determining module.
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| CN108287315B (en) * | 2018-01-12 | 2021-01-22 | 北京新能源汽车股份有限公司 | Power battery running state monitoring method and device and electric automobile |
| CN110361664A (en) * | 2019-08-23 | 2019-10-22 | 清华四川能源互联网研究院 | Battery detection method, battery monitoring device and charging equipment |
| CN110861533B (en) * | 2019-11-25 | 2021-08-27 | 安徽江淮汽车集团股份有限公司 | Electric vehicle SOH estimation method and device and storage medium |
| CN111142030B (en) * | 2019-12-30 | 2022-02-25 | Oppo广东移动通信有限公司 | Method, device and equipment for detecting internal short-circuit current and readable storage medium |
| CN111736083B (en) * | 2020-06-24 | 2024-03-08 | 广州小鹏汽车科技有限公司 | Battery health state acquisition method and device and storage medium |
| CN113466716A (en) * | 2021-06-17 | 2021-10-01 | 深圳市道通科技股份有限公司 | Battery health state measuring and calculating method and related equipment |
| CN114035061B (en) * | 2021-11-30 | 2023-08-29 | 深蓝汽车科技有限公司 | On-line estimation method and system for battery state of health of battery pack |
| CN114394079B (en) * | 2022-01-20 | 2023-07-21 | 深蓝汽车科技有限公司 | Vehicle brake release control system and method thereof and vehicle |
| CN115495900A (en) * | 2022-09-19 | 2022-12-20 | 广州汽车集团股份有限公司 | Whole vehicle storage battery aging analysis method and device and storage medium |
| CN115497192B (en) * | 2022-09-26 | 2023-08-25 | 深蓝汽车科技有限公司 | Method, device, equipment and storage medium for acquiring parking time of vehicle |
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| JP3815914B2 (en) * | 1999-02-26 | 2006-08-30 | 松下電器産業株式会社 | Capacity estimation method for lead acid battery |
| KR101223735B1 (en) * | 2011-04-07 | 2013-01-21 | 로베르트 보쉬 게엠베하 | Battery management system and control method thereof |
| CN103197257A (en) * | 2013-04-03 | 2013-07-10 | 华为技术有限公司 | Method and device for detecting state of health (SOH) of battery |
| US9411019B2 (en) * | 2013-12-16 | 2016-08-09 | Automotive Research & Testing Center | Method and system for estimating state of health of battery set |
| CN103728563B (en) * | 2013-12-17 | 2016-08-17 | 惠州市亿能电子有限公司 | A kind of measuring method of cell health state |
| TWI541525B (en) * | 2014-12-10 | 2016-07-11 | 大同股份有限公司 | Battery capacity estimating apparatus and battery capacity estimating method thereof |
| KR101631154B1 (en) * | 2015-01-14 | 2016-06-24 | (주) 유진에너팜 | SOH estimating apparatus of battery using adaptive rated capacity method and method thereof |
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