CN110098439A - A kind of method of power battery charging time Estimate - Google Patents
A kind of method of power battery charging time Estimate Download PDFInfo
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- CN110098439A CN110098439A CN201910280699.4A CN201910280699A CN110098439A CN 110098439 A CN110098439 A CN 110098439A CN 201910280699 A CN201910280699 A CN 201910280699A CN 110098439 A CN110098439 A CN 110098439A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention is a kind of power battery charging Time Estimation Method, including battery charging process is divided into multiple charging stages, the temperature rise for the charge information for obtaining different charging stages, obtaining battery voltage-state of charge curve at different temperatures, obtaining initial state information when battery starts to charge, obtaining battery each charging stage, the charge volume for obtaining battery each charging stage, the charging time for calculating each stage, total charging time is obtained.The invention has the advantages that fully considering temperature to the influence of cell voltage-state of charge curve, utilize the cell voltage-state of charge curve acquisition battery state of charge of battery at different temperatures, calculate the practical charging time in each stage, influence of the temperature to estimation result is eliminated, the accuracy of estimation is improved.
Description
Technical field
The present invention relates to battery charging field more particularly to a kind of methods of power battery charging time Estimate.
Background technique
Accurate power battery charging time Estimate is that the most basic performance indicator of power battery and consumer are current
Purchase one of vehicle demand.Meanwhile the estimation of accurate charging time can save the charging time, the promotion charge efficiency of maximum capacity and fill
The load of electric network.But it is influenced by power battery interior electrochemical factors and cell dynamics and thermodynamic (al) factor, power
The charging curve of battery will receive the influence and system of SOC, temperature, OCV curve, SOH, battery consistency and electric current and voltage
About, causing the current charging time to be estimated is not very accurately that deviation is relatively high.
Charging curve Vt-SOC is mainly divided into several rectangles by existing charging time estimation method, by every
Charging capacity in a preset rectangle is divided by with the charging current in corresponding rectangle, obtains filling in each preset charged rectangle
The electric time, then add up.The main deficiency of the program is when battery is charged with larger current, the calorific value of battery compared with
Greatly, therefore being obviously improved for battery temperature can be brought, and battery is at different temperatures, charging curve Vt-SOC can occur significantly
Offset, that is, at different temperatures, battery time of day SOCt corresponding to identical charging current It and identical electrical voltage point Vt is not
It is identical, similarly, under condition of different temperatures, electrical voltage point Vt under same current and identical SOCt state there are relatively large deviation,
And this deviation is mainly caused by temperature change.
Summary of the invention
Present invention mainly solves power battery charging at different temperatures can not accurate preestimating battery charged state ask
Topic provides a kind of actual scene for adapting to power battery charging and situation, and promotes estimated time precision power battery and fill
The method of electric time Estimate.
The technical solution adopted by the present invention to solve the technical problems is a kind of power battery charging Time Estimation Method,
The following steps are included:
S1: battery charging process is divided into multiple charging stages；
S2: the charge information of different charging stages is obtained；
S3: the voltage-state of charge curve of battery at different temperatures is obtained；
S4: initial state information when battery starts to charge is obtained；
S5: the temperature rise of battery each charging stage is obtained；
S6: the charge volume of battery each charging stage is obtained；
S7: calculating the charging time in each stage, obtains total charging time.
Battery charging is generally charged using ladder, in the charging current for determining each stage, cell voltage and is in advance measured
Charging time after, temperature of battery after each stage is obtained according to cell thermal model formula, passes through the electricity of the temperature
Piezo-electric lotus condition curve determines the state of charge of battery under the voltage, determines the stage by the electricity and charging current of battery
Charging time, the summation in each charging time in stage is the entire charging time.
Scheme as a preference of the above scheme, charge information includes charging current, the charging rank in the step S2
Cell voltage and the charging time in stage at the end of section.Cell voltage at the end of charging current and the charging stage is pre-
It first sets, which is averaged acquisition by repeatedly practice.
Scheme as a preference of the above scheme, the step S3 by giving offline test at different ambient temperatures
Sample carries out the state of charge and voltage of ladder charging and real-time detection test sample, obtains the electric piezo-electric of varying environment temperature
Lotus condition curve.
Scheme as a preference of the above scheme, the test sample are battery battery core.The coefficient of heat transfer of battery battery core
It is approximately 0, avoids battery charging spontaneous heating to acquisition curve in voltage-state of charge curve of battery under obtaining different temperatures
Influence.
Scheme as a preference of the above scheme, initial state information includes initial charge state in the step S4
SOC0, initial temperature T0With initial voltage V0。
Scheme as a preference of the above scheme, the step S5 obtain temperature rise, battery by cell thermal model formula
Thermal model formula is as follows:
Δ T is battery temperature rise, and i is current charging current, and r is battery impedance, and c is the specific heat capacity of battery, and M is battery matter
Amount, η are the coefficient of heat transfer of battery pack, and dt is the charging time.It is obtained using preset charging current, the charging time being averaged
Take the battery value that temperature rises during the charging process.
Scheme as a preference of the above scheme, the step S6 the following steps are included:
S61: the battery initial temperature obtained according to step S4；
S62: according to the temperature rise in the step S6 charging each stage obtained；
S63: the battery temperature that each ladder charged at the end of each stage is calculated；
S64: searching the corresponding voltage of each battery temperature-state of charge curve, at the end of determining ladder charging each stage
Battery state of charge；
S65: it calculates ladder and charges the charge volume in each stage.
Scheme as a preference of the above scheme, ladder charging each charging time in stage pass through following formula meter
It calculates:
ΔtnFor the charging time of n-th order section, SOCnFor the electricity at the end of n-th order section, SOCn-1Terminate for the (n-1)th stage
When electricity, InFor the charging current of n-th order section, CapFor the ampere-hour capacity of battery.
The invention has the advantages that fully considering temperature to the influence of cell voltage-state of charge curve, using battery not
Cell voltage-state of charge curve acquisition battery state of charge under synthermal, calculates the practical charging time in each stage, row
Influence in addition to temperature to estimation result improves the accuracy of estimation.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the invention.
Fig. 2 is a kind of flow diagram that each stage charge volume is obtained in the present invention.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing further description of the technical solution of the present invention.
Embodiment:
A kind of power battery charging Time Estimation Method of the present embodiment, as shown in Figure 1, comprising the following steps:
S1: battery charging process is divided into multiple charging stages；
S2: the charge information of different charging stages is obtained；First stage, second stage, phase III to n-th is respectively set
The charging current in stage is I1、I2、I3To In, battery in the first stage, second stage, the battery of phase III to n-th order section electricity
Pressure is followed successively by V1、V2、V3To Vn, wherein n >=2；V1、V2, to VnIt is sequentially increased, VnThe maximum charging voltage allowed for battery；I1、
I2, to InIt is sequentially reduced, InIt is maximum allowed current that can be fully charged by battery, utilizes electric current I1Cell voltage is filled 0 and is charged to V1,
Time needed for record, the charging time that repeatedly operation is repeatedly averaged the acquisition stage similarly obtain each charging rank
The charging time of section.
S3: by carrying out ladder charging and real-time detection battery battery core to offline battery battery core at different ambient temperatures
State of charge and voltage, obtain varying environment temperature voltage-state of charge curve；
S4: initial state information when battery starts to charge, including initial charge state SOC are obtained0, initial temperature T0With
Initial voltage V0；
S5: each stage temperature rise is obtained by cell thermal model formula, cell thermal model formula is as follows:
Δ T is battery temperature rise, and i is current charging current, and r is battery impedance, and c is the specific heat capacity of battery, and M is battery matter
Amount, η are the coefficient of heat transfer of battery pack, and dt is the charging time repeatedly charged to battery in step 2；
S6: as shown in Fig. 2, obtaining battery initial temperature T0Each rank is obtained with the temperature rise for obtaining each stage being calculated
Battery temperature at the end of section, determines that the battery temperature at the end of each stage, the battery temperature at the end of each stage are equal to
Battery initial temperature plus stage all temperature rises cumulative between the stage and, remember the temperature difference of battery at the end of each stage
For T1、T2……T3, battery temperature is searched in T1、T2……T3When corresponding voltage-state of charge curve be denoted as V respectivelyt-SOC1、
Vt-SOC2……Vt-SOCn, in Vt-SOC1Middle acquisition cell voltage is V1When state of charge SOC1, in Vt-SOC2Middle acquisition electricity
Cell voltage is V2When state of charge SOC2, and so on, obtain the battery state of charge in each stage；
S7: pass through formula:
The practical charging time in each stage is calculated, the sum of charging time time in each stage is entirely filling for battery
The electric time, wherein Δ tnFor the charging time of n-th order section, SOCnFor the electricity at the end of n-th order section, SOCn-1For the (n-1)th stage
At the end of electricity, InFor the charging current of n-th order section, CapFor the ampere-hour capacity of battery.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (8)
1. a kind of power battery charging Time Estimation Method, it is characterized in that: the following steps are included:
S1: battery charging process is divided into multiple charging stages；
S2: the charge information of different charging stages is obtained；
S3: the voltage-state of charge curve of battery at different temperatures is obtained；
S4: initial state information when battery starts to charge is obtained；
S5: the temperature rise of battery each charging stage is obtained；
S6: the charge volume of battery each charging stage is obtained；
S7: calculating the charging time in each stage, obtains total charging time.
2. a kind of power battery charging Time Estimation Method according to claim 1, it is characterized in that: being filled in the step S2
Power information includes charging current, the cell voltage at the end of the charging stage and the charging time in stage.
3. a kind of power battery charging Time Estimation Method according to claim 1, it is characterized in that: the step S3 passes through
The state of charge and electricity of ladder charging and real-time detection test sample are carried out to offline test sample at different ambient temperatures
Pressure obtains voltage-state of charge curve of varying environment temperature.
4. a kind of power battery charging Time Estimation Method according to claim 3, it is characterized in that: the test sample is
Battery battery core.
5. a kind of power battery charging Time Estimation Method according to claim 1, it is characterized in that: in the step S4 just
Beginning status information includes initial charge state SOC0, initial temperature T0With initial voltage V0。
6. a kind of power battery charging Time Estimation Method according to claim 1, it is characterized in that: the step S5 passes through
Cell thermal model formula obtains temperature rise, and cell thermal model formula is as follows:
Δ T is battery temperature rise, and i is current charging current, and r is battery impedance, and c is the specific heat capacity of battery, and M is battery quality, and η is
The coefficient of heat transfer of battery pack, dt are the charging time.
7. a kind of power battery charging Time Estimation Method according to claim 1 or 5, it is characterized in that: the step S6
The following steps are included:
S61: the battery initial temperature obtained according to step S4；
S62: according to the temperature rise in the step S6 charging each stage obtained；
S63: the battery temperature that each ladder charged at the end of each stage is calculated；
S64: searching the corresponding voltage of each battery temperature-state of charge curve, determines the electricity that ladder charged at the end of each stage
Pond state of charge；
S65: it calculates ladder and charges the charge volume in each stage.
8. a kind of power battery charging Time Estimation Method according to claim 1 or 2 or 3 or 4 or 5 or 6, feature
Be: ladder charging each charging time in stage is calculated by the following formula:
ΔtnFor the charging time of n-th order section, SOCnFor the electricity at the end of n-th order section, SOCn-1At the end of the (n-1)th stage
Electricity, InFor the charging current of n-th order section, CapFor the ampere-hour capacity of battery.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110492190A (en) * | 2019-09-06 | 2019-11-22 | 深圳市驰普科达科技有限公司 | Battery management method, system and computer readable storage medium |
| CN110909443A (en) * | 2019-10-12 | 2020-03-24 | 北京航空航天大学 | High-precision battery pack charging remaining time estimation method and system |
| CN111175654A (en) * | 2020-01-13 | 2020-05-19 | 广州小鹏汽车科技有限公司 | Power battery charging remaining time calculation method and device, vehicle and storage medium |
| CN111239611A (en) * | 2019-10-21 | 2020-06-05 | 浙江零跑科技有限公司 | Calculation method for calibrating PACKSOC based on single battery capacity |
| CN112213641A (en) * | 2019-10-30 | 2021-01-12 | 蜂巢能源科技有限公司 | Battery management system and method for obtaining remaining time |
| CN112216886A (en) * | 2019-10-30 | 2021-01-12 | 蜂巢能源科技有限公司 | Method and device for predicting battery charging time |
| CN113705002A (en) * | 2021-08-27 | 2021-11-26 | 巨伍汽车科技(昆山)有限公司 | Method for estimating heating time of battery pack |
| CN113884891A (en) * | 2021-11-03 | 2022-01-04 | 广西电网有限责任公司北海供电局 | Storage battery fault control system |
| CN113968160A (en) * | 2021-09-29 | 2022-01-25 | 华人运通(江苏)技术有限公司 | Vehicle charging time estimation method, device, equipment and storage medium |
| CN116278960A (en) * | 2023-03-01 | 2023-06-23 | 合众新能源汽车股份有限公司 | Electric automobile charging time prediction method and device |
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| CN110909443A (en) * | 2019-10-12 | 2020-03-24 | 北京航空航天大学 | High-precision battery pack charging remaining time estimation method and system |
| CN111239611A (en) * | 2019-10-21 | 2020-06-05 | 浙江零跑科技有限公司 | Calculation method for calibrating PACKSOC based on single battery capacity |
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| CN112216886A (en) * | 2019-10-30 | 2021-01-12 | 蜂巢能源科技有限公司 | Method and device for predicting battery charging time |
| CN112216886B (en) * | 2019-10-30 | 2022-05-20 | 蜂巢能源科技有限公司 | Method and device for estimating battery charging time |
| CN111175654A (en) * | 2020-01-13 | 2020-05-19 | 广州小鹏汽车科技有限公司 | Power battery charging remaining time calculation method and device, vehicle and storage medium |
| CN113705002A (en) * | 2021-08-27 | 2021-11-26 | 巨伍汽车科技(昆山)有限公司 | Method for estimating heating time of battery pack |
| CN113968160A (en) * | 2021-09-29 | 2022-01-25 | 华人运通(江苏)技术有限公司 | Vehicle charging time estimation method, device, equipment and storage medium |
| CN113968160B (en) * | 2021-09-29 | 2023-10-20 | 华人运通(江苏)技术有限公司 | Vehicle charging time estimation method, device, equipment and storage medium |
| CN113884891A (en) * | 2021-11-03 | 2022-01-04 | 广西电网有限责任公司北海供电局 | Storage battery fault control system |
| CN116278960A (en) * | 2023-03-01 | 2023-06-23 | 合众新能源汽车股份有限公司 | Electric automobile charging time prediction method and device |
| CN116278960B (en) * | 2023-03-01 | 2024-03-19 | 合众新能源汽车股份有限公司 | Electric automobile charging time prediction method and device |
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