CN108808132B - SOP control method of power battery - Google Patents
SOP control method of power battery Download PDFInfo
- Publication number
- CN108808132B CN108808132B CN201810382589.4A CN201810382589A CN108808132B CN 108808132 B CN108808132 B CN 108808132B CN 201810382589 A CN201810382589 A CN 201810382589A CN 108808132 B CN108808132 B CN 108808132B
- Authority
- CN
- China
- Prior art keywords
- discharge rate
- power battery
- maximum allowable
- interval
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention is suitable for the technical field of power batteries, and provides an SOP control method of a power battery, which comprises the following steps: s1, acquiring annual climate distribution of a high-frequency activity area of the vehicle in a high-frequency use time period; s2, obtaining the average service time of the vehicle; s3, predicting the maximum allowable discharge rate of the power battery in the target service life, and predicting the maximum allowable discharge rate of the power battery based on a temperature interval-discharge rate-capacity interval attenuation rate mapping table; and controlling the discharge rate of the power battery not to exceed the maximum allowable discharge rate in the running process. The maximum allowable discharge rate is obtained based on experimental tests, and the influence of factors of environment temperature, discharge rate and capacity interval is comprehensively considered, so that the obtained maximum allowable discharge rate is a relatively accurate value suitable for complex working conditions.
Description
Technical Field
The invention belongs to the technical field of power batteries, and provides an SOP control method of a power battery.
Background
As a strategic industry for coping with energy crisis and environmental crisis, new energy vehicles are rapidly developed, and a lithium power battery is a core component of a power system of an electric vehicle, the performance of the lithium power battery is important for the high efficiency and safety of vehicle operation, and a management system of the lithium power battery is also widely concerned. Since the battery not only needs to provide energy to satisfy a certain driving range, but also outputs required power, in battery management, state parameters SOC (remaining capacity), SOH (remaining life), and SOP (power withstand capability) of the battery are all important state parameters.
The available technology for estimating the power bearing capacity (SOP) of the lithium battery in real time is very few, the SOP represents the bearing capacity of the battery to charge and discharge power, and the accurate estimation of the SOP can enable the electric automobile to obtain larger power freedom on the premise of protecting the battery, such as available power for starting acceleration, speed for climbing a slope, power for recovering electric energy of a brake and the like. The prediction method related to the power bearing capacity of the battery in the prior art mainly comprises an impulse response method and an electrochemical model method, wherein the impulse response method applies specific impulse excitation to the battery under different SOC (state of charge), so that corresponding voltage is obtained to predict the power correspondingly, but the method only considers the static characteristic of the battery and has low prediction accuracy in a dynamic working condition; the electrochemical model method uses a large amount of chemical partial derivatives and utilizes various approximate combinations for estimation, but the application range after simplification is very limited, the application requirements are difficult to meet, and the existing models cannot give consideration to both complexity and accuracy.
Disclosure of Invention
The embodiment of the invention provides an SOP control method of a power battery, and aims to solve the problems that the prediction precision of an impulse response method in a dynamic working condition is very low and an electrochemical model method cannot meet the application requirement easily.
The invention is realized in such a way that an SOP control method of a power battery comprises the following steps:
s1, acquiring annual climate distribution of a high-frequency activity area of the vehicle in a high-frequency use time period;
s2, obtaining the average service time of the vehicle;
s3, predicting the maximum allowable discharge rate of the power battery in the target service life, and predicting the maximum allowable discharge rate of the power battery based on a temperature interval-discharge rate-capacity interval attenuation rate mapping table;
and S4, controlling the discharge rate of the power battery not to exceed the maximum allowable discharge rate in the running process.
Further, the method for acquiring the temperature interval-discharge multiplying power-capacity interval decay rate mapping table comprises the following steps:
s31, testing the decay time of the power battery from the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval under different temperature intervals and different discharge multiplying powers;
and S32, calculating the capacity attenuation rate of the corresponding capacity interval under different temperature intervals and different discharge multiplying factors.
Further, the step S31 includes the following steps:
s311, in different temperature intervals, circularly discharging the battery by adopting a preset discharge rate, attenuating the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval, and recording discharge time;
and S312, changing the preset discharge multiplying power of the cyclic discharge, attenuating the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval, and recording the discharge time.
Further, the step S4 specifically includes the following steps:
if the requested discharge multiplying power is larger than or equal to the maximum allowable discharge multiplying power, controlling the power battery to output at the maximum allowable discharge multiplying power;
and if the requested discharge rate is smaller than the maximum allowable discharge rate, controlling the power battery to output at the requested discharge rate.
The invention limits the maximum allowable discharge rate of the power battery based on the capacity attenuation rate under different temperatures and different discharge rates, the environment temperature when the power battery works and the average working time, under the maximum allowable discharge rate, the service life of the power battery can reach the target service life,
in addition, the maximum allowable discharge rate is obtained based on experimental tests, and the influence of factors of the environment temperature, the discharge rate and the capacity interval is comprehensively considered, so that the obtained maximum allowable discharge rate is a relatively accurate value suitable for complex working conditions.
Drawings
Fig. 1 is a flowchart of a power battery SOP control method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a flowchart of a power battery SOP control method provided in an embodiment of the present invention, where the method includes the following steps:
s1, acquiring annual climate distribution of a high-frequency activity area of the vehicle in a high-frequency use time period;
in the embodiment of the invention, the environment temperature of the power battery during working is determined based on the high-frequency activity area of the vehicle and the high-frequency use time period of the vehicle, the environment temperature difference is large in areas with clear four seasons and different time periods all day long, the influence of the environment temperature on the performance of the power battery cannot be ignored, the annual climate distribution of the high-frequency activity area during the high-frequency use time period is estimated based on the historical annual climate of the areas, and in addition, the three information of the high-frequency activity area of the vehicle and the high-frequency use time period of the vehicle can be input by a user or can be obtained based on driving records.
S2, obtaining the average service time of the vehicle;
the average usage duration may be user input or obtained based on driving records.
S3, estimating the maximum allowable discharge rate of the power battery in the target service life, wherein the maximum allowable discharge rate is specific to a capacity interval, namely the maximum allowable discharge rates in different capacity intervals are different;
in the embodiment of the invention, the maximum allowable discharge rate of the power battery is estimated based on a temperature interval-discharge rate-capacity interval decay rate mapping table stored in the power battery, wherein the capacity decay rate is specific to a capacity interval, namely the capacity decay rates of different capacity intervals are tested under different temperature intervals and different discharge rates, and the capacity intervals are divided based on the consistency of battery characteristics and are generally divided into the following three intervals: 100% -92%, 92% -85%, and 85% -80%, wherein when the battery capacity is attenuated to 80% of the battery capacity, the power battery cannot be used any longer, in the embodiment of the present invention, in order to reduce the number of experimental tests, a temperature interval is used as an experimental test parameter, and the temperature interval is divided based on the consistency of battery characteristics, and is generally divided into the following three intervals: -20 ℃ to 0 ℃, 0 ℃ to 15 ℃, 15 ℃ to 45 ℃, 45 ℃ to 55 ℃.
The maximum allowable discharge rate is obtained through experimental measurement, and the obtaining method comprises the following steps:
s31, testing the decay time of the power battery from the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval under different temperature intervals and different discharge multiplying powers;
in the embodiment of the present invention, step S31 specifically includes the following steps:
s311, in different temperature intervals, circularly discharging the battery by adopting a preset discharge rate, attenuating the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval, and recording discharge time;
and S312, changing the preset discharge multiplying power of the cyclic discharge, attenuating the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval, and recording the discharge time.
And S32, calculating the capacity attenuation rate of the corresponding capacity interval under different temperature intervals and different discharge multiplying factors.
And S4, controlling the discharge rate of the power battery not to exceed the maximum allowable discharge rate in the running process.
In the embodiment of the invention, if the requested discharge rate is greater than or equal to the maximum allowable discharge rate, the power battery is controlled to output at the maximum allowable discharge rate, and if the requested discharge rate is less than the maximum allowable discharge rate, the power battery is controlled to output at the requested discharge rate.
The invention limits the maximum allowable discharge rate of the power battery based on the capacity attenuation rate under different temperatures and different discharge rates, the environment temperature when the power battery works and the average working time, under the maximum allowable discharge rate, the service life of the power battery can reach the target service life,
in addition, the maximum allowable discharge rate is obtained based on experimental tests, and the influence of factors of the environment temperature, the discharge rate and the capacity interval is comprehensively considered, so that the obtained maximum allowable discharge rate is a relatively accurate value suitable for complex working conditions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. An SOP control method of a power battery, characterized in that the method comprises the following steps:
s1, acquiring annual climate distribution of a high-frequency activity area of the vehicle in a high-frequency use time period;
s2, obtaining the average service time of the vehicle;
s3, predicting the maximum allowable discharge rate of the power battery in the target service life, and predicting the maximum allowable discharge rate of the power battery based on a temperature interval-discharge rate-capacity interval attenuation rate mapping table;
s4, controlling the discharge rate of the power battery not to exceed the maximum allowable discharge rate in the running process;
the step S4 specifically includes the following steps:
if the requested discharge multiplying power is larger than or equal to the maximum allowable discharge multiplying power, controlling the power battery to output at the maximum allowable discharge multiplying power;
and if the requested discharge rate is smaller than the maximum allowable discharge rate, controlling the power battery to output at the requested discharge rate.
2. The SOP control method of a power battery according to claim 1, wherein the obtaining method of the temperature interval-discharge rate-capacity interval decay rate mapping table comprises the steps of:
s31, testing the decay time of the power battery from the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval under different temperature intervals and different discharge multiplying powers;
and S32, calculating the capacity attenuation rate of the corresponding capacity interval under different temperature intervals and different discharge multiplying factors.
3. The SOP control method of a power battery according to claim 2, wherein said step S31 includes the steps of:
s311, in different temperature intervals, circularly discharging the battery by adopting a preset discharge rate, attenuating the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval, and recording discharge time;
and S312, changing the preset discharge multiplying power of the cyclic discharge, attenuating the maximum value of each capacitance interval to the minimum value of the corresponding capacitance interval, and recording the discharge time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810382589.4A CN108808132B (en) | 2018-04-26 | 2018-04-26 | SOP control method of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810382589.4A CN108808132B (en) | 2018-04-26 | 2018-04-26 | SOP control method of power battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108808132A CN108808132A (en) | 2018-11-13 |
| CN108808132B true CN108808132B (en) | 2020-08-21 |
Family
ID=64093892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810382589.4A Expired - Fee Related CN108808132B (en) | 2018-04-26 | 2018-04-26 | SOP control method of power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108808132B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020107451A1 (en) * | 2018-11-30 | 2020-06-04 | 深圳市大疆创新科技有限公司 | Control method for movable platform, movable platform and storage medium |
| CN110281808B (en) * | 2019-05-22 | 2021-03-19 | 北京航盛新能科技有限公司 | V2G safety control method and system based on battery temperature and health state |
| CN111443290B (en) * | 2019-12-30 | 2021-08-06 | 南京航空航天大学 | SOP estimation method for power battery of electric vehicle with closed-loop control |
| CN111413630B (en) * | 2020-03-11 | 2022-06-14 | 合肥国轩高科动力能源有限公司 | Pulse discharge power correction method for lithium battery |
| CN113370846B (en) * | 2021-07-30 | 2022-09-06 | 东风商用车有限公司 | Predictive thermal management method and predictive thermal management system for battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833918A (en) * | 2014-05-22 | 2015-08-12 | 北汽福田汽车股份有限公司 | Method for detection of service life of power battery of vehicle, and system |
| CN106654415A (en) * | 2016-12-30 | 2017-05-10 | 深圳市国创动力***有限公司 | SOP control system and method for lithium titanate battery BMS based on hybrid power system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348256B (en) * | 2013-07-30 | 2016-09-21 | 国家电网公司 | Consider the polymorphic type battery energy storage power station energy management method of charge-discharge magnification |
| CN106597305B (en) * | 2016-12-09 | 2019-01-22 | 合肥国轩高科动力能源有限公司 | A kind of Cycle life prediction method of lithium ion battery |
| CN106772100B (en) * | 2017-02-06 | 2020-02-21 | 联想(北京)有限公司 | Method and device for predicting service life of battery |
| CN107861075B (en) * | 2017-12-24 | 2020-03-27 | 江西优特汽车技术有限公司 | Method for determining SOP of power battery |
-
2018
- 2018-04-26 CN CN201810382589.4A patent/CN108808132B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833918A (en) * | 2014-05-22 | 2015-08-12 | 北汽福田汽车股份有限公司 | Method for detection of service life of power battery of vehicle, and system |
| CN106654415A (en) * | 2016-12-30 | 2017-05-10 | 深圳市国创动力***有限公司 | SOP control system and method for lithium titanate battery BMS based on hybrid power system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108808132A (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108808132B (en) | SOP control method of power battery | |
| CN107861075B (en) | Method for determining SOP of power battery | |
| CN103163480B (en) | The appraisal procedure of lithium battery health status | |
| CN102590755B (en) | Method and device for acquiring lithium ion battery capacity | |
| CN108919129A (en) | When a kind of under variable working condition power battery life-span prediction method | |
| CN110873841B (en) | Battery life prediction method based on combination of data driving and battery characteristics | |
| EP3594705B1 (en) | Method and device for estimating service capacity and state of health of minimum battery cell and battery system | |
| CN109921111A (en) | A kind of internal temperature of lithium ion battery estimating and measuring method and system | |
| CN106291392B (en) | A kind of battery dynamic characteristic test method and device | |
| CN103308864A (en) | Method for estimating secondary cell SOH value and testing residual service life | |
| CN110323519A (en) | Battery pack method for heating and controlling and system | |
| CN104749533A (en) | Online estimation method of health status of lithium ion battery | |
| CN105388426A (en) | Method and apparatus for estimating state of health (SOH) of battery | |
| CA2577402A1 (en) | Method and system for determining the soc of a rechargeable battery | |
| CN102608540A (en) | Coulomb efficiency measuring method used for SOC (system-on-chip) evaluation of power battery | |
| CN104360286A (en) | Lithium ion battery charge state estimation modification method | |
| CN106372272B (en) | Lithium battery capacity and service life prediction method based on generalized degradation model and multi-scale analysis | |
| CN110764009A (en) | Method for estimating battery pack circulation capacity and health state of electric automobile | |
| CN102856601A (en) | Method and system for adjusting real-time battery capacity during automobile charging and electric automobile | |
| CN113608132B (en) | Method, system and storage medium for determining residual capacity of lithium ion battery | |
| CN103267953A (en) | Estimation method of SOC (State of Charge) of lithium iron phosphate power battery | |
| US20240003981A1 (en) | Method for estimating a power or current limit for an electrical energy storage system | |
| CN112363061A (en) | Thermal runaway risk assessment method based on big data | |
| CN111257770A (en) | Battery pack power estimation method | |
| CN112731162B (en) | Battery health degree detection method based on V2G use scene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 Termination date: 20210426 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |