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 PDF

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Publication number
CN102707236A
CN102707236A CN 201210143777 CN201210143777A CN102707236A CN 102707236 A CN102707236 A CN 102707236A CN 201210143777 CN201210143777 CN 201210143777 CN 201210143777 A CN201210143777 A CN 201210143777A CN 102707236 A CN102707236 A CN 102707236A
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battery
charging
power
power battery
monitoring system
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CN 201210143777
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Chinese (zh)
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CN102707236B (en )
Inventor
周逢权
张展国
徐怡山
徐鹏
李家辉
李洪峰
李涛
王金行
相智才
罗开明
赵成功
连湛伟
陈志刚
高建坤
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山东电力集团公司
山东电力集团公司青岛供电公司
许昌许继软件技术有限公司
许继电气股份有限公司
许继集团有限公司
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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

—种充换电站监控系统的动力电池SOC估算方法 - kind of charge for battery SOC estimation method of a Monitoring System

技术领域 FIELD

[0001] 本发明属于汽车动力电池技术领域,涉及一种充换电站监控系统的动力电池SOC估算方法。 [0001] The present invention belongs to the technical field of automotive battery, battery SOC estimation relates to a method of charging for power plant monitoring system.

背景技术 Background technique

[0002] 随着电动公交车智能充换储放一体化电站的建设,电动公交车安全可靠运行,支撑电动公交车运行的动力系统---动力电池的状态尤为重要,而动力电池的运行情况,特别是SOC值更能直观的反应实际情况,所以一套准确的估算SOC值的方法迫在眉睫。 [0002] With the electric bus intelligent charge for store building integrated power station, safe and reliable operation of electric buses, electric power systems support buses running --- battery status is particularly important, and the power battery operation , especially more intuitive SOC value of the actual situation of reaction, a method to accurately estimate the SOC value is imminent.

发明内容 SUMMARY

[0003] 本发明的目的是提供一种充换电站监控系统的动力电池SOC估算方法,以准确的估算SOC值。 [0003] The object of the present invention is a battery SOC estimation method to provide a charge for plant monitoring system to accurately estimate the SOC value.

[0004] 为实现上述目的,本发明的充换电站监控系统的动力电池SOC估算方法的步骤如下: [0004] To achieve the above object, the steps of the method of estimating battery SOC charge for plant monitoring system of the present invention is as follows:

(I)根据充换电站电动车实际使用的动力电池特性参数获得动力电池组容量; (I) obtained according to the capacity of the traction battery charge for the battery powered electric vehicle power plant parameters actually used;

(2)对动力电池组进行充电,实时上送充电数据,根据充电电压和电流计算出充电电 (2) power to charge the battery pack, the charging data sent to the real-time, calculate the charging voltage and the charging current

量; the amount;

(3)动力电池组运行于电动车上后,通过车载智能终端,将动力电池放电数据实时上传于监控系统,该监控系统计算出放电电量; (3) the traction battery after the electric vehicle is running, the vehicle intelligent terminal, the battery discharge data is uploaded in real time to the monitoring system, the monitoring system calculates the discharge capacity;

(4)根据充电电量和放电电量计算得到实际电量,通过行车中电池温度以及充电次数对电量的影响,拟合出一个修正因子,根据公式 (4) calculated according to the actual battery charged electricity and discharged electricity, by influencing the driving battery temperature and the charging times of electricity, fitting a correction factor, according to the formula

SOC=(实际电量/额定电量)*修正因子对SOC值进行在线实时修正。 SOC = (actual power / rated power) * correction factor for the SOC value online real-time correction.

[0005] 进一步的,所述步骤(I)中的动力电池特性参数包括电池的电芯、模块组合、电池额定容量、工作温度范围和充放电次数限制。 Dynamic battery characteristics [0005] Further, the step (I) the cell comprises a battery module assembly, the rated capacity of the battery, operating temperature range and the number of charge and discharge limits.

[0006] 进一步的,所述步骤(2)中对动力电池组采用稳压限流方式进行充电。 [0006] Further, the step (2) in the charging regulator using current-limiting embodiment of the power batteries.

[0007] 进一步的,所述步骤(2)中对动力电池组进行充电,当系统判定动力电池内任一单体电压处于设定范围时,调整充电电流和充电电压。 [0007] Further, the step (2) is charged traction battery, when the system determines that the cell voltage of any one of the battery in a set range, adjusting the charging current and charging voltage.

[0008] 进一步的,在充放电过程中,动力电池容量任一单体电压大于阈值电压,并通过此数据算出动力电池固化不变容量以校正动力电池的额定容量。 [0008] Further, during charging and discharging, the battery cell voltage is greater than the capacity of any of the threshold voltage, and this data is calculated by the same battery capacity is cured to correct battery rated capacity.

[0009] 本发明的充换电站监控系统的动力电池SOC估算方法通过在充换电站监控系统中,实时测量动力电池的电流值、电压值、温度、充电次数,以及充电电量和放电电量,然后对以上测量值进行统计、计算,依据SOC计算公式计算出动力电池SOC值,并在此过程根据温度以及动力电池的充电次数数据拟合出一个影响SOC精度的修正因子,对SOC值进行在线修正。 [0009] battery SOC estimation method of charging for the monitoring system of plant according to the invention by charging for the monitoring system of utility in the real-time current value is measured battery voltage value, temperature, number of charge cycles, and charged electricity and discharged electricity, and above statistical measurements, calculations, calculated according to the battery SOC calculated SOC value, and a fitting process affect the accuracy of SOC correction factor based on the number of charging and the battery temperature data, on-line correction value SOC . 该方法简单、实用,且能够实时进行自动或人工修正,使估算值更加准确。 The method is simple, practical, and can be automatically or manually corrected in real time, so that more accurate estimates. 附图说明 BRIEF DESCRIPTION

[0010] 图I是动力电池特性参数影响曲线图一; [0010] Figure I is a battery characteristic parameter affects a graph;

图2是动力电池特性参数影响曲线图二; FIG 2 is a battery characteristic graph showing impact two parameters;

图3是本发明实施例的方法流程图。 FIG 3 is a process flowchart of an embodiment of the present invention.

具体实施方式 detailed description

[0011] 如图3所示,充换电站监控系统的动力电池SOC估算方法的步骤如下: Step battery SOC estimation method [0011] As shown, the charge for plant monitoring system 3 as follows:

(1)根据充换电站电动车实际使用的动力电池特性参数获得动力电池组容量;动力电池特性参数包括电池的电芯、模块组合、电池额定容量、工作温度范围和充放电次数限制, 如图1、2所示; (1) obtained according to the capacity of battery pack filling station battery characteristics of electric vehicles actually used parameters; parameters battery including a battery cell, a combination of modules, the rated capacity of the battery, operating temperature range and limit the number of charge and discharge, as shown in FIG 2;

(2)对动力电池组采用稳压限流方式进行充电,实时上送充电数据,根据充电电压和电流计算出充电电量;当系统判定动力电池内任一单体电压处于设定范围时,调整充电电流和充电电压; (2) the adoption of the traction battery charge regulator limiting embodiment, the real-time data sent to the charging, the charging power is calculated based on the charging voltage and current; when the system determines that the cell voltage of any one of the battery in a set range, the adjustment charging current and charging voltage;

(3)动力电池组运行于电动车上后,通过车载智能终端,将动力电池放电数据实时上传于监控系统,该监控系统计算出放电电量; (3) the traction battery after the electric vehicle is running, the vehicle intelligent terminal, the battery discharge data is uploaded in real time to the monitoring system, the monitoring system calculates the discharge capacity;

(4)根据充电电量和放电电量计算得到实际电量,通过行车中电池温度以及充电次数对电量的影响,拟合出一个修正因子,根据公式“S0C=(实际电量/额定电量)*修正因子”对SOC值进行在线实时修正。 (4) calculated according to the actual battery charged electricity and discharged electricity, by influencing the driving battery temperature and the charging times of electricity, fitting a correction factor, according to the formula "S0C = (actual power / nominal power) * Correction Factor" SOC value of online real-time correction.

[0012] 在充放电过程中,动力电池容量任一单体电压大于阈值电压,并通过此数据算出动力电池固化不变容量以校正动力电池的额定容量。 [0012] In the charging and discharging process, the power capacity of the battery cell voltage is greater than any of the threshold voltage, and this data is calculated by the same battery capacity is cured to correct battery rated capacity.

[0013] 修正因子,不仅通过充电过程中的次数、温度等对电量的影响去拟合修正因子,还通过车辆行驶过程中动力电池的放电过程中的电量去拟合修正因子。 [0013] correction factor, the correction factor is not only to fit the charging process by affecting the number and temperature of electricity, but also to fit the correction factor by the vehicle battery during the discharge process of driving power.

[0014] 本方法不仅仅是关注动力电池的充电过程,也实时关注动力电池的放电过程,综合动力电池的充放电特性去实现对动力电池SOC的估算,解决了如果动力电池管理系统没有的情况下,怎么在监控系统侧简单的去估算动力电池SOC的方法,以便更安全可靠的观测电动车的运行。 [0014] This method is not only concerned about the power of the battery charging process, is also concerned about the real-time charging and discharging characteristics of the battery discharge process, to achieve an integrated power battery power battery SOC estimation, to solve the power if the battery management system is not the case next, how the surveillance system to estimate the simple side battery SOC way to run a more secure and reliable observation of electric vehicles.

Claims (5)

  1. 1. 一种充换电站监控系统的动力电池SOC估算方法,其特征在于,该方法的步骤如下:(I)根据充换电站电动车实际使用的动力电池特性参数获得动力电池组容量; (2)对动力电池组进行充电,实时上送充电数据,根据充电电压和电流计算出充电电量; (3)动力电池组运行于电动车上后,通过车载智能终端,将动力电池放电数据实时上传于监控系统,该监控系统计算出放电电量; (4)根据充电电量和放电电量计算得到实际电量,通过行车中电池温度以及充电次数对电量的影响,拟合出一个修正因子,根据公式SOC=(实际电量/额定电量)*修正因子对SOC值进行在线实时修正。 A charge for battery SOC estimation method of a Monitoring System, wherein the step of the method are as follows: (I) obtained according to the capacity of the traction battery characteristics filling station battery electric vehicle parameters actually used; (2 ) for charging the power battery, charging data sent to the real-time, battery charging current and the charging voltage is calculated; (3) the traction battery after the electric vehicle is running, the vehicle intelligent terminal, the battery discharge power to upload data in real time monitoring system, the monitoring system calculates the discharge quantity; (4) calculated according to the actual battery charged electricity and discharged electricity, by influencing the driving battery temperature and the charging times of electricity, fitting a correction factor, according to the formula SOC = ( actual power / rated power) * correction factor for the SOC value online real-time correction.
  2. 2.根据权利要求I所述的方法,其特征在于:所述步骤(I)中的动力电池特性参数包括电池的电芯、模块组合、电池额定容量、工作温度范围和充放电次数限制。 2. The method as claimed in claim I, wherein: the power battery characteristic parameter step (I) includes a battery cell, a combination of modules, the rated capacity of the battery, operating temperature range and the number of charge and discharge limits.
  3. 3.根据权利要求2所述的方法,其特征在于:所述步骤(2)中对动力电池组采用稳压限流方式进行充电。 3. The method according to claim 2, wherein: said step (2) in the charging regulator using current-limiting embodiment of the power batteries.
  4. 4.根据权利要求3所述的方法,其特征在于:所述步骤(2)中对动力电池组进行充电,当系统判定动力电池内任一单体电压处于设定范围时,调整充电电流和充电电压。 4. The method according to claim 3, wherein: said step (2) is charged traction battery, when the system determines that the cell voltage of any one of the battery in a set range, the charging current is adjusted and Charging voltage.
  5. 5.根据权利要求1-4中任一项所述的方法,其特征在于:在充放电过程中,动力电池容量任一单体电压大于阈值电压,并通过此数据算出动力电池固化不变容量以校正动力电池的额定容量。 The method according to any one of claims 1-4, characterized in that: the charging and discharging process, the power capacity of the battery cell voltage is greater than any of the threshold voltage, and the battery power cured by this data was calculated the same capacity to correct the rated capacity of the battery power.
CN 201210143777 2012-05-10 2012-05-10 Power battery SOC (State of Charge) estimation method for charging station monitoring system CN102707236B (en)

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