CN102707236A - Power battery SOC (State of Charge) estimation method for charging station monitoring system - Google Patents
Power battery SOC (State of Charge) estimation method for charging station monitoring system Download PDFInfo
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- CN102707236A CN102707236A CN2012101437774A CN201210143777A CN102707236A CN 102707236 A CN102707236 A CN 102707236A CN 2012101437774 A CN2012101437774 A CN 2012101437774A CN 201210143777 A CN201210143777 A CN 201210143777A CN 102707236 A CN102707236 A CN 102707236A
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- 238000012544 monitoring process Methods 0.000 title abstract 4
- 230000005611 electricity Effects 0.000 claims abstract description 8
- 238000011156 evaluation Methods 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 2
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Abstract
The invention relates to a power battery SOC (State of Charge) estimation method for a charging station monitoring system. The estimation method comprises the steps of: obtaining the capacity of a power battery pack according to the characteristic parameters of a power battery practically used by electric bus in a charging station; charging the power battery pack, transmitting charging data in real time, and calculating charging quantity; uploading discharging data of the power battery to the monitoring system in real time through a vehicular intelligent terminal after the power battery pack runs on the electric bus, and calculating the discharging quantity by the monitoring system; and obtaining the influence of temperature and charging frequency on the electricity quantity according to running data, fitting a correction factor, and carrying out online real-time correction on the calculated SOC value. The method can carry out statistics and calculation to obtain the SOC value of the power battery according to the measurement value of the power battery, and fit the correction factor according to the data of temperature and the charging frequency of the power battery, so as to carry out online correction on the SOC value. The method is simple and practical and can perform automatic or manual correction in real time so that the estimation value is more accurate.
Description
Technical field
The invention belongs to the automobile power cell technical field, relate to a kind of electrokinetic cell SOC evaluation method that fills the electrical changing station supervisory system.
Background technology
Along with electric bus intelligence is filled and is changed the construction of storing integrated power station; The electric bus safe and reliable operation; Support the electric bus operation power system--the state of-electrokinetic cell is particularly important; And the ruuning situation of electrokinetic cell, particularly SOC value more can be reacted actual conditions intuitively, so a cover estimates that accurately the method for SOC value is extremely urgent.
Summary of the invention
The purpose of this invention is to provide a kind of electrokinetic cell SOC evaluation method that fills the electrical changing station supervisory system, to estimate the SOC value accurately.
Be to realize above-mentioned purpose, the step of the electrokinetic cell SOC evaluation method that fills the electrical changing station supervisory system of the present invention is following:
(1) according to the electrokinetic cell characterisitic parameter that fills the actual use of the electrical changing station electric motor car battery capacity that gains impetus;
(2) power battery pack is charged, send the charging data in real time, calculate charge capacity according to charging voltage and galvanometer;
(3) after power battery pack runs in the electric motor car, through vehicle intelligent terminal, the electrokinetic cell discharge data is uploaded in supervisory system in real time, this supervisory system calculates discharge electricity amount;
(4) calculate actual electric weight according to charge capacity and discharge electricity amount, the influence of electric weight is simulated a modifying factor, according to formula through battery temperature and charging times in the driving
SOC=(actual electric weight/specified electric quantity) * modifying factor
The SOC value is carried out the online in real time correction.
Further, the electrokinetic cell characterisitic parameter in the said step (1) comprises electric core, module combinations, battery rated capacity, the operating temperature range of battery and discharges and recharges the number of times restriction.
Further, adopt the voltage stabilizing current-limiting mode to charge to power battery pack in the said step (2).
Further, said step is charged to power battery pack in (2), when arbitrary monomer voltage is in setting range in electrokinetic cell is judged by system, and adjustment charging current and charging voltage.
Further, in charge and discharge process, the arbitrary monomer voltage of electrokinetic cell capacity is greater than threshold voltage, and calculates electrokinetic cell through these data and solidify not varying capacity to proofread and correct the rated capacity of electrokinetic cell.
The electrokinetic cell SOC evaluation method that fills the electrical changing station supervisory system of the present invention is through in filling the electrical changing station supervisory system; Measure current value, magnitude of voltage, temperature, the charging times of electrokinetic cell in real time; And charge capacity and discharge electricity amount; Then above measured value is added up, calculated; Calculate electrokinetic cell SOC value according to the SOC computing formula, and go out a modifying factor that influences the SOC precision according to the charging times data fitting of temperature and electrokinetic cell, the SOC value is carried out online correction in this process.This method is simple, practical, and can carry out automatic or manual correction in real time, makes estimated value more accurate.
Description of drawings
Fig. 1 is an electrokinetic cell influence of characteristic parameter curve map one;
Fig. 2 is an electrokinetic cell influence of characteristic parameter curve map two;
Fig. 3 is the method flow diagram of the embodiment of the invention.
Embodiment
As shown in Figure 3, the step of electrokinetic cell SOC evaluation method of filling the electrical changing station supervisory system is following:
(1) according to the electrokinetic cell characterisitic parameter that fills the actual use of the electrical changing station electric motor car battery capacity that gains impetus; The electrokinetic cell characterisitic parameter comprises electric core, module combinations, battery rated capacity, the operating temperature range of battery and discharges and recharges the number of times restriction, like Fig. 1, shown in 2;
(2) adopt the voltage stabilizing current-limiting mode to charge to power battery pack, send the charging data in real time, calculate charge capacity according to charging voltage and galvanometer; When arbitrary monomer voltage is in setting range in electrokinetic cell is judged by system, adjustment charging current and charging voltage;
(3) after power battery pack runs in the electric motor car, through vehicle intelligent terminal, the electrokinetic cell discharge data is uploaded in supervisory system in real time, this supervisory system calculates discharge electricity amount;
(4) calculate actual electric weight according to charge capacity and discharge electricity amount; Through battery temperature and charging times in the driving to the influence of electric weight; Simulate a modifying factor, the SOC value is carried out the online in real time correction according to formula " SOC=(actual electric weight/specified electric quantity) * modifying factor ".
In charge and discharge process, the arbitrary monomer voltage of electrokinetic cell capacity is greater than threshold voltage, and calculates electrokinetic cell through these data and solidify not varying capacity to proofread and correct the rated capacity of electrokinetic cell.
Modifying factor is not only gone the match modifying factor through the number of times in the charging process, temperature etc. to the influence of electric weight, also goes the match modifying factor through the electric weight in the discharge process of vehicle ' process medium power battery.
This method is not only to pay close attention to the charging process of electrokinetic cell; Also pay close attention to the discharge process of electrokinetic cell in real time; The charge-discharge characteristic of comprehensive dynamic battery goes to realize the estimation to electrokinetic cell SOC; How if solved under the situation that power battery management system do not have, simply go to estimate the method for electrokinetic cell SOC in the supervisory system side, so that the operation of the observation electric motor car of safety and reliability.
Claims (5)
1. electrokinetic cell SOC evaluation method that fills the electrical changing station supervisory system is characterized in that the step of this method is following:
(1) according to the electrokinetic cell characterisitic parameter that fills the actual use of the electrical changing station electric motor car battery capacity that gains impetus;
(2) power battery pack is charged, send the charging data in real time, calculate charge capacity according to charging voltage and galvanometer;
(3) after power battery pack runs in the electric motor car, through vehicle intelligent terminal, the electrokinetic cell discharge data is uploaded in supervisory system in real time, this supervisory system calculates discharge electricity amount;
(4) calculate actual electric weight according to charge capacity and discharge electricity amount, the influence of electric weight is simulated a modifying factor, according to formula through battery temperature and charging times in the driving
SOC=(actual electric weight/specified electric quantity) * modifying factor
The SOC value is carried out the online in real time correction.
2. method according to claim 1 is characterized in that: the electrokinetic cell characterisitic parameter in the said step (1) comprises electric core, module combinations, battery rated capacity, the operating temperature range of battery and discharges and recharges the number of times restriction.
3. method according to claim 2 is characterized in that: adopt the voltage stabilizing current-limiting mode to charge to power battery pack in the said step (2).
4. method according to claim 3 is characterized in that: said step is charged to power battery pack in (2), when arbitrary monomer voltage is in setting range in electrokinetic cell is judged by system, and adjustment charging current and charging voltage.
5. according to each described method among the claim 1-4; It is characterized in that: in charge and discharge process; The arbitrary monomer voltage of electrokinetic cell capacity is greater than threshold voltage, and calculates electrokinetic cell through these data and solidify not varying capacity to proofread and correct the rated capacity of electrokinetic cell.
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| CN201210143777.4A CN102707236B (en) | 2012-05-10 | 2012-05-10 | Power battery SOC (State of Charge) estimation method for charging station monitoring system |
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| CN201210143777.4A CN102707236B (en) | 2012-05-10 | 2012-05-10 | Power battery SOC (State of Charge) estimation method for charging station monitoring system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163475A (en) * | 2013-02-04 | 2013-06-19 | 普天新能源有限责任公司 | System on chip (SOC) value measuring method of battery system |
| CN103235266A (en) * | 2013-03-29 | 2013-08-07 | 重庆长安汽车股份有限公司 | Charging state estimation method and charging state estimation device of power batteries |
| CN104051810A (en) * | 2014-06-25 | 2014-09-17 | 中国东方电气集团有限公司 | Rapid correction method for SOC (state of charge) estimation of energy storage lithium ion battery system |
| CN106772063A (en) * | 2016-11-21 | 2017-05-31 | 华中科技大学 | A kind of method and its device for monitoring charge states of lithium ion battery and health status |
| CN107015162A (en) * | 2017-06-06 | 2017-08-04 | 安徽美能储能系统有限公司 | A kind of SOC on-line calibration methods for zinc-bromine flow battery |
| CN108196199A (en) * | 2018-01-23 | 2018-06-22 | 广州小鹏汽车科技有限公司 | Lithium battery capacity evaluation method, system and device under a kind of whole vehicle state |
| CN105807232B (en) * | 2016-03-16 | 2019-01-25 | 青岛理工大学 | Lead-acid storage battery residual capacity and battery health condition estimation method |
| CN109521366A (en) * | 2018-11-21 | 2019-03-26 | 爱驰汽车（上海）有限公司 | Electric car changes the performance estimating method and device of power battery in power mode |
| CN109557474A (en) * | 2018-11-22 | 2019-04-02 | 北京新能源汽车股份有限公司 | Method, device and equipment for correcting state of charge of power battery |
| CN110422078A (en) * | 2018-04-26 | 2019-11-08 | 宁德时代新能源科技股份有限公司 | Electric box and electric quantity acquisition method thereof |
| CN111257761A (en) * | 2020-03-01 | 2020-06-09 | 盐城工学院 | Lithium battery SOC estimation method and system based on thermodynamic model |
| CN111969263A (en) * | 2020-07-20 | 2020-11-20 | 浙江吉智新能源汽车科技有限公司 | Method and device for updating SOH of battery pack in charging and replacing power station |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163475A (en) * | 2013-02-04 | 2013-06-19 | 普天新能源有限责任公司 | System on chip (SOC) value measuring method of battery system |
| CN103235266A (en) * | 2013-03-29 | 2013-08-07 | 重庆长安汽车股份有限公司 | Charging state estimation method and charging state estimation device of power batteries |
| CN103235266B (en) * | 2013-03-29 | 2017-03-08 | 重庆长安汽车股份有限公司 | The charging state estimation method and a charging state estimation device of electrokinetic cell |
| CN104051810A (en) * | 2014-06-25 | 2014-09-17 | 中国东方电气集团有限公司 | Rapid correction method for SOC (state of charge) estimation of energy storage lithium ion battery system |
| CN104051810B (en) * | 2014-06-25 | 2016-04-06 | 中国东方电气集团有限公司 | A kind of lithium-ion energy storage battery system SOC estimates rapid correction method |
| CN105807232B (en) * | 2016-03-16 | 2019-01-25 | 青岛理工大学 | Lead-acid storage battery residual capacity and battery health condition estimation method |
| CN106772063A (en) * | 2016-11-21 | 2017-05-31 | 华中科技大学 | A kind of method and its device for monitoring charge states of lithium ion battery and health status |
| CN107015162A (en) * | 2017-06-06 | 2017-08-04 | 安徽美能储能系统有限公司 | A kind of SOC on-line calibration methods for zinc-bromine flow battery |
| CN108196199A (en) * | 2018-01-23 | 2018-06-22 | 广州小鹏汽车科技有限公司 | Lithium battery capacity evaluation method, system and device under a kind of whole vehicle state |
| CN108196199B (en) * | 2018-01-23 | 2020-08-07 | 广州小鹏车联网科技有限公司 | Lithium battery capacity estimation method, system and device in vehicle state |
| CN110422078A (en) * | 2018-04-26 | 2019-11-08 | 宁德时代新能源科技股份有限公司 | Electric box and electric quantity acquisition method thereof |
| CN110422078B (en) * | 2018-04-26 | 2022-04-08 | 宁德时代新能源科技股份有限公司 | Electric box and electric quantity acquisition method thereof |
| CN109521366A (en) * | 2018-11-21 | 2019-03-26 | 爱驰汽车（上海）有限公司 | Electric car changes the performance estimating method and device of power battery in power mode |
| CN109557474A (en) * | 2018-11-22 | 2019-04-02 | 北京新能源汽车股份有限公司 | Method, device and equipment for correcting state of charge of power battery |
| CN109557474B (en) * | 2018-11-22 | 2021-04-23 | 北京新能源汽车股份有限公司 | Method, device and equipment for correcting state of charge of power battery |
| CN111257761A (en) * | 2020-03-01 | 2020-06-09 | 盐城工学院 | Lithium battery SOC estimation method and system based on thermodynamic model |
| CN111969263A (en) * | 2020-07-20 | 2020-11-20 | 浙江吉智新能源汽车科技有限公司 | Method and device for updating SOH of battery pack in charging and replacing power station |
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