CN104241713A - SOC (state of charge) correcting method and SOC correcting device of power battery - Google Patents

SOC (state of charge) correcting method and SOC correcting device of power battery Download PDF

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CN104241713A
CN104241713A CN 201310241998 CN201310241998A CN104241713A CN 104241713 A CN104241713 A CN 104241713A CN 201310241998 CN201310241998 CN 201310241998 CN 201310241998 A CN201310241998 A CN 201310241998A CN 104241713 A CN104241713 A CN 104241713A
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value
battery
state
charge
power
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CN 201310241998
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CN104241713B (en )
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张君鸿
李德伟
鲁连军
卫晓薇
夏彩萍
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北汽福田汽车股份有限公司
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285Testing apparatus
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL INTO ELECTRICAL ENERGY
    • H01M2220/00Batteries for particular applications
    • H01M2220/20Batteries in motive systems, e.g. vehicle, ship, plane

Abstract

The invention discloses an SOC (state of charge) correcting method of a power battery. The SOC correcting method comprises the following steps: acquiring the estimation value and the exact value of the current SOC of the power battery; comparing the estimation value and the exact value, and judging whether the calculation value of the real-time SOC of the power battery, obtained based on the estimation value, needs to be corrected according to the compared result; if so, generating a correction coefficient according to the state of the power battery and the estimation value and the exact value of the current SOC of the power battery; and calculating the correction value of the real-time SOC of the power battery according to the input and output electricity quantity of the power battery, the correction coefficient and the estimation value of the power battery collected in real time. According to the method provided by the embodiment of the invention, the SOC value deviating from the exact value can be corrected smoothly to be relative exact SOC value, so that the method has the advantages that drivers cannot perceive the correction so as to be prevented from feeling uneasy. The invention also discloses an SOC correcting device of the power battery.

Description

动力电池的荷电状态SOC修正方法及装置 The state of charge SOC correction method and device battery power

技术领域 FIELD

[0001] 本发明涉及汽车制造技术领域,特别涉及一种动力电池的荷电状态S0C修正方法及装置。 [0001] The present invention relates to automobile manufacturing technology, and particularly relates to a power battery state of charge S0C correction method and apparatus.

背景技术 Background technique

[0002] 在电动汽车技术中,动力电池的SOC (state of charge荷电状态)估算是其中的一个关键环节,正确显示电池系统当前的S0C可以帮助驾驶员估算剩余的续驶里程,因而非常重要。 [0002] In the electric vehicle technology, the power of the battery SOC (state of charge SOC) estimation is one of the key aspects of the right displays the current battery system can help the driver S0C estimated remaining driving range, which is very important . 通常所采用的S0C估算方法是在电量积分的基础上,加上开路电压修正、充电修正等措施来消除累计误差,但是在检测到准确的S0C点(通常是达到S0C为0%的点或为100%的点)并将其作为新的积分起点时,如果在与原先计算出的旧的S0C值存在较大差别的情况下,直接使用新的积分起点,虽然更准确,但是将会出现S0C的跳变,从而引发仪表剩余电量的跳变,最终引起驾驶员的不安。 S0C estimation method commonly used is based on charge integration, coupled with the open-circuit voltage correction, the correction measures to eliminate charge accumulated error, but the detected accurately S0C point (generally an amount of 0% S0C point or is 100% point) and as a new starting point for the integration, if in case there is a big difference with the previous calculated value of the old S0C, direct integration with the new starting point, although it is more accurate, but there will be S0C jump, causing the remaining capacity meter jump, and ultimately lead to the driver's anxiety.

[0003] 目前基于电量积分法估算S0C的原理如下公式所示: [0003] It S0C estimated based on the principle of charge integration method shown in the following formula:

[0004] [0004]

Figure CN104241713AD00041

[0005] 其中S0Q指积分初始时的S0C值,η指充放电效率,I指充放电电流,C指电池容量。 [0005] wherein S0Q means S0C initial integration value, η refers to the charge-discharge efficiency, I refers to the charge and discharge current, C refers to the capacity of the battery. 电池系统出厂时的真实S0C由电池厂家通过充放电来设定为某一值(如50%),BMS将其算法中的积分起点S0Q设定为该值(如50%),后续在行车和充电过程中,由BMS (battery management system电池管理系统)来检测充入或放出电池组的电量,由此来确定电池组中剩余的电量。 S0C real system at the factory by the battery manufacturers battery charge and discharge is set to a value (e.g., 50%), its starting point the BMS integral algorithm S0Q set as the value (e.g. 50%) by the driving and subsequent charging, by the BMS (battery management system BMS) to detect the charged or discharged capacity of the battery pack, thereby determining the amount of power remaining in the battery.

[0006] 在理想的状况下,该算法可以跟踪电池系统的剩余电量,从而得出电池系统的S0C 作为驾驶员剩余续驶里程的参考,但是由于BMS的累计误差和电池组的自放电等原因,随着算法运行时间的延长,BMS估算出的S0C和电池组真实的S0C之间的误差将会变得越来越大,最终将失去参考意义。 [0006] In an ideal situation, the algorithm can track the remaining battery system, the battery system to arrive at the reference S0C remaining range of the driver, but because of the self-discharge BMS cumulative error causes the battery pack and with the extended running time, the error between the S0C BMS estimated S0C and batteries will become more and more real, will eventually lose the reference value. 为了解决累计误差和自放电的问题,通常采用的做法是通过开路电压与S0C的对应关系来修正积分初值。 In order to solve the problems and errors accumulated self-discharge, often using a correspondence relationship is corrected by the open-circuit voltage and the initial value of the integral S0C. 但由于开路电压不是随时都可以获得的,只有在电池系统输出输入电流为〇且持续超过一定时间(如2h)才能获得电池的开路电压值, 这样的,通常在电动汽车早晨启动(假如夜间停驶)时获得的开路电压值通过查表得出当前对应的S0C值,替换掉BMS中保存的原S0C积分初值作为新的积分初值。 However, due to the open circuit voltage is not always available, only in open circuit voltage of the battery system output the input current is square and continued over a certain time (eg 2h) to get the battery, so usually start (if the night parked in the electric car in the morning open voltage obtained when driving) current corresponding to a value obtained S0C look-up table, replacing the original initial value stored in the integrator S0C BMS as a new initial value of the integral.

[0007] 现有技术(开路电压辅助的电量累计法)其思想是基于通过累计电池系统输入输出的电量Ah数来估算S0C,但是在通过开路电压修正时,由于旧的S0C初值与新的S0C初值之间可能存在比较大的差别,S0C将会由旧初值突变为新初值(突变过程中可能没有行车或充电),这样就会造成驾驶员的不安,认为S0C指针在不可预计地跳动,引起驾驶员的抱怨,影响车辆的口碑。 [0007] The prior art (open-circuit voltage of the auxiliary power accumulated Method) The idea is based on the number of input and output power by integrating Ah battery system to estimate S0C, but when corrected by the open circuit voltage, since the initial value of the old and new S0C S0C between the initial value may be relatively large difference, S0C will be from the old to the new initial value of the initial mutation (mutation process may not be driving or charging), this will result in the driver's anxiety that S0C pointer unpredictable beating, causing the driver complaints, affecting the reputation of the vehicle.

发明内容 SUMMARY

[0008] 本发明旨在至少解决上述技术问题之一。 [0008] The present invention aims to solve at least one of the technical problems described above.

[0009] 为此,本发明的一个目的在于提出一种动力电池的荷电状态S0C修正方法。 [0009] It is therefore an object of the present invention is to provide a battery state of charge S0C correction method. 该方法可将偏离准确值的S0C平滑地修正到比较准确的S0C值,具有不会引起驾驶员察觉的优点,避免驾驶员的不安。 S0C The method may deviate from the exact values ​​smoothly corrected to more accurate S0C value, it has the advantage of not causing perceived by the driver, to avoid disturbing the driver.

[0010] 本发明的另一目的在于提出一种动力电池的荷电状态S0C修正装置。 [0010] Another object of the present invention is to propose a power state of charge of a battery S0C correction means.

[0011] 为了实现上述目的,本发明第一方面的实施例提出了一种动力电池的荷电状态S0C修正方法,包括以下步骤:获取动力电池当前的荷电状态的估计值和准确值;比较所述估计值和准确值,并根据比较结果判断是否对基于所述估计值得到的所述动力电池实时的荷电状态的计算值进行修正;如果是,则根据所述动力电池的状态、所述动力电池当前的荷电状态的估计值和准确值生成修正系数;以及根据实时采集的所述动力电池的输入输出电量、所述修正系数和所述估计值计算所述动力电池实时的荷电状态的修正值。 [0011] To achieve the above object, a first aspect of the embodiments of the present invention provides a battery state of charge S0C correction method, comprising the steps of: obtaining a current state of charge of the battery and accurately estimate value; Comparative the exact value and the estimated value, and determines whether the comparison result of the calculated mean values ​​of the real battery state of charge based on the estimated correction; if yes, according to the state of the battery power, the and generating an accurate estimate of the value of the correction coefficient of the current state of charge of said battery; and a power battery in accordance with the real-time acquisition of the input and output power, the correction coefficient and the estimated real value of charge of the battery is calculated correction value state.

[0012] 根据本发明实施例的动力电池的荷电状态S0C修正方法,在表观S0C与真实S0C 之间存在差异时,通过减缓或加快电量累计法的累计速度来减小表观S0C与真实S0C之间的差异,最终达到一致的状态,从而可以避免S0C的突变引起驾驶员抱怨。 [0012] The state of charge of a battery powered embodiment S0C correction method of the embodiment of the present invention, when there is a difference between the apparent and real S0C S0C, by slowing or accelerating the speed of accumulated charge accumulation method to reduce the apparent and real S0C the difference between the S0C, and ultimately achieve a consistent state, thereby avoiding S0C mutations cause the driver to complain. 另外,表观S0C (修正值)将会随着电量的消耗或增加呈线性变化,便于驾驶员预测剩余续驶里程。 The apparent S0C (correction value) will increase as the power consumption or changes linearly, to facilitate the driver prediction residual range.

[0013] 另外,根据本发明上述实施例的动力电池的荷电状态S0C修正方法还可以具有如下附加的技术特征: [0013] Further, according to the state of charge of the power battery S0C correction method of the above-described embodiments of the present invention may also have the following additional technical features:

[0014] 在一些示例中,所述动力电池实时的荷电状态的修正值通过如下公式得到: [0014] In some examples, the correction value of the real power of the battery state of charge is obtained by the following equation:

[0015] [0015]

Figure CN104241713AD00051

[0016] 具甲,SU(JQ为所还佰计但,SU(Jt为动刀电池在t时刻的荷电状态的修正值,k为修正系数,η为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 [0016] with A, SU (JQ meter but as the further Bai, SU (Jt knife as the correction value of the battery state of charge at time t, k is a correction coefficient, η battery charge-discharge efficiency, I is the power the battery charge and discharge current, c is the battery capacity.

[0017] 在一些示例中,其中,如果所述动力电池的状态为充电状态且所述估计值大于或等于所述准确值,或者所述动力电池的状态为放电状态且所述估计值小于所述准确值,则所述修正系数取值范围位于(〇,1)之间的值;如果所述动力电池的状态为充电状态且所述估计值小于所述准确值,或者所述动力电池的状态为放电状态且所述估计值大于或等于所述准确值,则所述修正系数取值为大于1的数值。 [0017] In some examples, wherein, if the estimated value is greater than the state of the battery state of charge and is equal to the exact value or, or the state of the battery and the discharge state is smaller than the estimated value said exact value, the correction coefficient is situated in the range between (square, 1) value; and if the battery state of charge and the state of the estimated value is less than the exact value, or the power battery the discharge state and the state estimation value greater than or equal to the exact value, the numerical value of the correction coefficient is greater than 1.

[0018] 在一些示例中,其中,如果所述动力电池的状态为放电状态,则所述修正系数为: [0018] In some examples, wherein, if the state of the battery is discharged state, the correction coefficient is:

Figure CN104241713AD00052

其中,所述k为修正系数,所述socl为所述估计值,所述SOC2为所述准确值; Wherein, the correction factor k, the estimated value of the socl, the exact value of the SOC2;

[0019] 在一些示例中,其中,如果所述动力电池的状态为充电状态,则所述修正系数为: [0019] In some examples, wherein, if the state is the state of charge of the battery power, then the correction factor is:

Figure CN104241713AD00053

,其中,所述k为修正系数,所述socl为所述估计值,所述S0C2为所述准确值。 , Wherein k is the correction factor, the estimated value of the socl, the exact value of the S0C2.

[0020] 在一些示例中,还包括:根据所述实时采集的所述动力电池的输入输出电量和所述准确值计算所述动力电池实时的荷电状态的精确值;当所述动力电池实时的荷电状态的修正值与对应时刻的所述动力电池实时的荷电状态的精确值之差小于预设值时,停止对所述动力电池实时的荷电状态进行修正。 [0020] In some examples, further comprising: a power battery of the real-time collection of output power and input the accurate calculation of an exact value of the real power of the battery state of charge in accordance with; real-time when the battery power the exact value of the difference between the battery state of charge correction value corresponding to the real time state of charge is less than a predetermined value, stopping the battery state of charge in real-time correction.

[0021] 在一些示例中,还包括:显示所述动力电池实时的荷电状态的修正值。 [0021] In some examples, further comprising: displaying the correction value of the real power of the battery state of charge.

[0022] 本发明另一方面的实施例公开了一种动力电池的荷电状态S0C修正装置,包括: 获取模块,用于获取动力电池当前的荷电状态的估计值和准确值;判断模块,用于比较所述估计值和准确值,并根据比较结果判断是否对基于所述估计值得到的所述动力电池实时的荷电状态的计算值进行修正;修正系数生成模块,用于根据所述动力电池的状态、所述动力电池当前的荷电状态的估计值和准确值生成修正系数;以及修正模块,用于根据实时采集的所述动力电池的输入输出电量、所述修正系数和所述估计值计算所述动力电池实时的荷电状态的修正值。 [0022] In another aspect of the present invention discloses embodiments of a power state of charge of the battery S0C correction apparatus, comprising: an obtaining module, configured to obtain an estimated value and an accurate value of the current state of charge of the battery; determining module, for comparing the estimated value and an accurate value, and determines whether the calculated mean values ​​of the real battery state of charge estimation based on the corrected based on a comparison result; the correction coefficient generation module, according to the state of the battery, the estimated value and an accurate current value of the battery state of charge generating a correction coefficient; and a correction module for input and output of the battery power of the real-time acquisition of the correction coefficient and the calculating an estimated value of the correction value of the real power of the battery state of charge.

[0023] 根据本发明实施例的动力电池的荷电状态S0C修正装置,在表观S0C与真实S0C 之间存在差异时,通过减缓或加快电量累计法的累计速度来减小表观S0C与真实S0C之间的差异,最终达到一致的状态,从而可以避免S0C的突变引起驾驶员抱怨。 [0023] The state of charge of a battery powered embodiment S0C correction apparatus of the embodiment of the present invention, when there is a difference between the apparent and real S0C S0C, by slowing or accelerating the speed of accumulated charge accumulation method to reduce the apparent and real S0C the difference between the S0C, and ultimately achieve a consistent state, thereby avoiding S0C mutations cause the driver to complain. 另外,表观S0C (修正值)将会随着电量的消耗或增加呈线性变化,便于驾驶员预测剩余续驶里程。 The apparent S0C (correction value) will increase as the power consumption or changes linearly, to facilitate the driver prediction residual range.

[0024] 另外,根据本发明上述实施例的动力电池的荷电状态S0C修正装置还可以具有如下附加的技术特征: [0024] Further, the state of charge correction device for a power battery S0C above-described embodiments of the present invention may also have the following additional technical features:

[0025] 在一些示例中,所述动力电池实时的荷电状态的修正值通过如下公式得到: [0025] In some examples, the correction value of the real power of the battery state of charge is obtained by the following equation:

[0026] [0026]

Figure CN104241713AD00061

[0027] 其中,S0Q为所述估计值,S0Ct为动力电池在t时刻的荷电状态的修正值,k为修正系数,η为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 [0027] wherein, S0Q is the estimated value, S0Ct correction value for the battery state of charge at the time t, k is a correction coefficient, η is the battery charge and discharge efficiency, I is the power of the battery charge and discharge current, c is battery capacity.

[0028] 在一些示例中,还包括:显示模块,用于显示所述动力电池实时的荷电状态的修正值。 [0028] In some examples, further comprising: a display module for displaying real-time correction value of the battery state of charge.

[0029] 本发明的附加方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本发明的实践了解到。 [0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, from the following description in part be apparent from, or learned by practice of the present invention.

附图说明 BRIEF DESCRIPTION

[0030] 本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中: [0030] The foregoing and / or other aspects and advantages of the invention will be described with reference to embodiments in conjunction with the embodiments become apparent and more readily appreciated below, wherein:

[0031] 图1是根据本发明一个实施例的动力电池的荷电状态S0C修正方法的流程图。 [0031] FIG. 1 is a flowchart of the state of charge a power battery S0C correction method according to an embodiment of the present invention.

[0032] 图2是根据本发明一个实施例动力电池的荷电状态S0C修正方法的具体流程图; 以及 [0032] FIG 2 is a flowchart of a specific state of charge correction method S0C one case of battery powered embodiment of the present invention; and

[0033] 图3是根据本发明一个实施例动力电池的荷电状态S0C修正装置的结构图。 [0033] FIG. 3 is a configuration diagram of the state of charge correction device according to an example of a power S0C battery according to embodiments of the present invention.

具体实施方式 detailed description

[0034] 下面详细描述本发明的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 [0034] Example embodiments of the present invention is described in detail below, exemplary embodiments of the embodiment shown in the accompanying drawings, wherein same or similar reference numerals designate the same or similar elements or elements having the same or similar functions. 下面通过参考附图描述的实施例是示例性的,仅用于解释本发明,而不能理解为对本发明的限制。 By following with reference to the embodiments described are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0035] 在本发明的描述中,需要理解的是,术语"中心"、"纵向"、"横向"、"上"、"下"、"前"、 "后"、"左"、"右"、"坚直"、"水平"、"顶"、"底"、"内"、"外"等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。 [0035] In the description of the present invention, it is to be understood that the term "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right "," Kennedy straight "," horizontal "," top "," bottom "," inner "," outer position or positional relationship "and the like as indicated by the position or orientation based on the relationship shown in the drawings, for convenience of description only and the present invention is to simplify the description, but does not indicate or imply that the device or element referred to must have a particular orientation, the orientation of a particular configuration and operation, can not be construed as limiting the present invention. 此外,术语"第一"、"第二"仅用于描述目的,而不能理解为指示或暗示相对重要性。 In addition, the terms "first", "second" are for illustrative purposes only, and not intended to indicate or imply relative importance.

[0036] 在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语"安装"、"相连"、"连接"应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。 [0036] In the description of the present invention, it is noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected to", "connected" are to be broadly understood, for example, may be a fixed connection, may be a detachable connection, or integrally connected; may be a mechanical connector may be electrically connected; may be directly connected, can also be connected indirectly through intervening structures, it may be in communication the interior of the two elements. 对于本领域的普通技术人员而言,可以具体情况理解上述术语在本发明中的具体含义。 Those of ordinary skill in the art, be appreciated that the specific circumstances of the specific meanings in the present invention.

[0037] 以下结合附图描述根据本发明实施例的动力电池的荷电状态S0C修正方法及装置。 [0037] The following state of charge S0C battery power correction method and apparatus according to an embodiment of the present invention is described in conjunction with the accompanying drawings.

[0038] 图1是根据本发明一个实施例的动力电池的荷电状态S0C修正方法的流程图。 [0038] FIG. 1 is a flowchart of the state of charge a power battery S0C correction method according to an embodiment of the present invention. 如图1所示,该动力电池的荷电状态S0C修正方法,包括如下步骤: As shown in FIG 1, the power state of charge of the battery S0C correction method, comprising the steps of:

[0039] 步骤S101 :获取动力电池当前的荷电状态的估计值和准确值。 [0039] Step S101: obtaining an estimated value and an accurate value of the current state of charge of the battery.

[0040] 具体地说,动力电池当前的荷电状态的估计值可通过电量积分法估计得到,动力电池当前的荷电状态的准确值可通过采集动力电池的开路电压值,并根据开路电压值得到。 [0040] Specifically, the estimated value of the current state of charge of the battery charge can be estimated by integration obtained, the exact value of the current state of charge of the battery acquired by the battery open voltage and open-circuit voltage is worth to.

[0041] 作为一个具体的例子,如图2所示,动力电池(简称电池)出厂时,通过充放电将动力电池的电池组的荷电状态S0C调整为某一值如S0C0,在电池组与电池管理系统(BMS)集成后,将BMS中的S0C初值设置为S0C0 (与电池组实际状态相匹配),完成步骤" S0C初值校准"。 [0041] As a specific example, the time, the battery 2 (the cell) in FIG factory, by charging and discharging the battery state of charge of the battery pack S0C adjusted to a certain value such as S0C0, the battery pack and a battery management system (BMS) after integration, the BMS will be set to the initial value S0C S0C0 (to match the actual state of the battery pack), completion of step "S0C calibrate the initial value."

[0042] 动力电池(已经集成了BMS和电池组部件)在车上开始运行后的一段时间后,车辆停驶超过一段时间(如2个小时,视不同的电池类型而定,以能获得准确的S0C为准),荷电状态变为S0C1,车辆再启动时,BMS采集到开路电压并根据开路电压与S0C的对应关系得出一个更准确的荷电状态值S0C2。 [0042] The power battery (BMS has integrated components and batteries) after a period of time after the vehicle starts running, the vehicle suspended over a period of time (e.g., two hours, depending on the type of battery to be able to obtain accurate S0C the subject), the state of charge becomes S0C1, and then start the vehicle, BMS acquired open-circuit voltage and arrive at a more accurate state of charge value based on the correspondence S0C2 S0C and the open-circuit voltage. 此时,可认为S0C1为上述估计值,S0C2为准确值。 In this case, the above estimate that S0C1, S0C2 as accurate.

[0043] 步骤S102 :比较估计值和准确值,并根据比较结果判断是否对基于估计值得到的动力电池实时的荷电状态的计算值进行修正。 [0043] the step S102: comparing the estimated value and an accurate value, and determines whether to estimate based on the real-time worth calcd state of charge of the battery power is corrected in accordance with the comparison result.

[0044] 具体地说,由于动力电池自放电以及BMS计算的估计值的累积误差,可导致估计值和准确值不同,因此,当比较估计值和准确值不同时,或者两者之间的差值大于某一阈值时,判断需要对基于估计值得到的动力电池实时的荷电状态的计算值进行修正。 [0044] Specifically, since the battery self-discharge and the accumulated error estimation value calculated BMS, can lead to different estimates and exact values, therefore, when comparing the estimated value and accurate values ​​are different, or the difference between the two when the value is greater than a certain threshold value, it is judged necessary to estimate based on Calcd worth of battery power to the real-time state of charge corrected. 其中,该阈值可根据经验预先设定。 Wherein, the threshold may be empirically set in advance.

[0045] 步骤S103 :如果是,则根据动力电池的状态、动力电池当前的荷电状态的估计值和准确值生成修正系数。 [0045] Step S103: If it is, according to the state of the battery power, and accurate estimate of the value of the current state of charge of the battery to generate a correction coefficient. 即在判断需要对基于估计值得到的动力电池实时的荷电状态的计算值进行修正时,例如在上述的估计值与实际值相差较多时,则可以根据动力电池的状态、 动力电池当前的荷电状态的估计值和准确值生成修正系数。 I.e., when it is determined necessary to estimate based on worth to real-time calculated value of the state of charge of the battery is corrected, for example when the above estimated value and the actual value differ frequently, depending on the state of battery power, battery current charge and estimate an accurate value of the electrical generating state correction coefficient.

[0046] 具体而言,如果动力电池的状态为充电状态且估计值大于或等于准确值,或者动力电池的状态为放电状态且估计值小于准确值,则修正系数取值范围位于(〇,1)之间的值; 如果动力电池的状态为充电状态且估计值小于准确值,或者动力电池的状态为放电状态且估计值大于或等于准确值,则修正系数取值为大于1的数值。 [0046] Specifically, if the state of the battery state of charge and the state estimation value is equal to or greater than the exact value, or the power to the battery discharge state and the estimated value is less than the exact value, the correction coefficient is located in the range (square, 1 ) value between; state if the state of charge of the battery power and the estimated value is less than the exact value, or the state of battery discharge state and the estimated value is equal to or greater than the exact value, the numerical value of the correction coefficient is greater than 1.

[0047] 在本发明的一个实施例中,如果动力电池的状态为放电状态,则修正系数为 [0047] In one embodiment of the present invention, if the state of the battery is discharged state, the correction coefficient is

Figure CN104241713AD00081

,其中,k为修正系数,socl为估计值,soc2为准确值。 Wherein, k is a correction factor, the estimated value of SOCl, SOC2 as accurate.

[0048] 此外,如果动力电池的状态为充电状态,则修正系数为: [0048] In addition, if the state of the battery state of charge is, the correction coefficient is:

Figure CN104241713AD00082

,其中,k为修正系数,socl为估计值,soc2为准确值。 Wherein, k is a correction factor, the estimated value of SOCl, SOC2 as accurate.

[0049] 步骤S104 :根据实时采集的动力电池的输入输出电量、修正系数和估计值计算动力电池实时的荷电状态的修正值。 [0049] Step S104: The input and output power of the battery acquired in real time, the value of the correction coefficient and the correction value calculating estimated battery state of charge in real time.

[0050] 具体地说,结合图2所示,例如在计算得到S0C2与S0C1,并在两者之间存在差异时。 [0050] Specifically, in conjunction with FIG. 2, for example, when the calculated S0C2 and S0C1, and there is a difference therebetween. 可通过电池管理系统BMS存储器上述两个S0C,即S0C1和S0C2, S0C2是更符合电池实际荷电状态的,而S0C1是驾驶员原来一直关注其变化因而比较熟悉的S0C值,这时候如果在接下来的车辆运行过程中直接用S0C2替换掉S0C1作为电量积分的初值,特别是在没有行车或充电(没有电流)的情况下进行替换,驾驶员会觉察到明显的S0C突变过程,将会产生抱怨。 Can both S0C, namely S0C1 and S0C2, S0C2 is more in line with BMS battery management system memory by actual battery state of charge, and S0C1 the driver had been concerned about the changes and thus more familiar S0C value at this time if the ground during vehicle operation directly down the replacement S0C2 out as S0C1 Initial charge integration, especially in the absence of replacement or charge driving (no current), the driver will perceive the distinct S0C mutation, will produce complain.

[0051] 此时,本发明的实施例的方法仍然以S0C1作为接下来车辆运行过程中电量累计的积分起点,有两种情况,S0C1 > S0C2和S0C1〈S0C2 ;在S0C1 > S0C2时,即准确值(准确值S0C2)低于显示值(估计值S0C1)的情况下,又分为两种情况,充电工况(动力电池的充电状态)和放电工况(动力电池的放电状态),在充电工况下,电池组的真实荷电量在逐渐增力口,这时候如果按照电量积分法进行S0C的估算,由于表观荷电状态值(以S0C1为积分起点的荷电状态值)高于真实的S0C,表观荷电状态将会提前达到充电终点100% ;而在放电工况下,由于电池组的真实荷电量在逐渐减小,表观S0C将会延后达到放电终点;本发明实施例的方法采用减缓或加快表观S0C (计算值)累计速度的方法来使表观S0C与真实S0C吻合,所采用的方案可以有多种,本实施例动力电池实时的荷电状态的修正值通过如下 [0051] In this case, the method of the embodiments of the present invention as the subsequent still S0C1 charge accumulated during vehicle operation starting points, there are two cases, S0C1> S0C2 and S0C1 <S0C2; in S0C1> S0C2, that accurately if the value (exact value S0C2) is lower than the displayed value (estimated value S0C1), is divided into two cases, the charging conditions (battery state of charge) and discharge Electrical conditions (battery discharge state), the charging conditions, the real battery charge amount is gradually increasing opening force, if at this time in accordance with the estimated power S0C integration method, since the apparent state of charge value (in the integral S0C1 starting state of charge value) higher than the true S0C the apparent state of charge reaches the charge will end before 100%; in the discharge condition, since the real battery charge amount is gradually reduced, the apparent delay will S0C reaches the discharge end; embodiment of the present invention the method of embodiment employs an apparent slowing or accelerating S0C correction value (calculated value) accumulated to the apparent speed of the method with the real S0C S0C coincide, the program may be employed a variety of, for example, battery state of charge in real time according to the present embodiment by 公式得到: Equation:

[0052] [0052]

Figure CN104241713AD00083

[0053] 其中,S0Q为估计值,S0Ct为动力电池在t时刻的荷电状态的修正值,k为修正系数,η为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 [0053] wherein, S0Q is the estimated value, S0Ct correction value state of charge of the battery at time t, k is a correction coefficient, η the charge-discharge efficiency of battery, I is the power of the battery charge and discharge current, c is battery capacity.

[0054] 该修正系数k在需要延缓积分速度时采用小于1的数(如0. 5),而在需要加快积分速度的时候采用大于1的数(如2),修正系数的数值大小视S0C1和S0C2之间差值而定, 且为可标定值,由实车测试得出。 [0054] The correction coefficient k using the number (e.g., 0.5) of less than 1 when desirable to slow the speed of integration, while the use of a number greater than 1 (e.g. 2), the correction coefficient values ​​depending on the size S0C1 when needed to accelerate the integration speed S0C2 and the difference between the set and is a calibratable value, obtained by the real vehicle test.

[0055] 在表观S0C与真实S0C吻合后,可将该系数置为1。 [0055] After the apparent S0C S0C coincide with the real, the coefficient may be set to 1. 即本发明实施例的方法可根据实时采集的动力电池的输入输出电量和准确值计算动力电池实时的荷电状态的精确值;当动力电池实时的荷电状态的修正值与对应时刻的动力电池实时的荷电状态的精确值之差小于预设值时,停止对动力电池实时的荷电状态进行修正。 I.e., method embodiments of the present invention may be the exact value according to the real-time state of charge of input and output real-time acquisition of the battery power and accuracy values ​​calculated battery power; when the battery correction value battery in real time the state of charge corresponding to the time exact value of the difference between the real state of charge is less than a predetermined value, stopping the battery state of charge in real-time correction.

[0056] 另外,在S0C1〈S0C2下,判断车辆是否处于行车工况(动力电池的充电状态),在行车工况下,减缓表观S0C的累计速度,在充电工况下,加快S0C的累计速度。 [0056] Further, in the S0C1 <S0C2, determines whether the vehicle is in the driving condition (traction battery charge state), the driving conditions, the apparent slow rate S0C is accumulated, the charging conditions, the cumulative accelerate S0C speed. 减缓和加快的速度,同样由修正系数k决定。 Slow down and speed up the rate, determined by the same correction factor k. 例如:在放电过程中,k值取上述的 For example: during discharge, k takes a value above

Figure CN104241713AD00091

;在充电过程中,k例如取上述的 ; During charging, k taking the above-described e.g.

Figure CN104241713AD00092

[0057] 采用如上取值的优点是在整个电量累计法估算S0C的过程中,估算出的S0C都是匀速变化,不会出现突变,有利于驾驶员估算剩余续驶里程;另外采用上述公式进行k的取值时,表观S0C与准确的S0C会同时达到100%或0%。 [0057] The advantages of using the above values ​​is accumulated in the whole amount estimation process S0C the method is estimated S0C uniform change, mutation does not occur, in favor of the driver estimated residual range; Further the above formula when the value of k, the apparent S0C accurate S0C simultaneously reach 100% or 0%. 但是需要注意的是,修正系数k值只是加快或减缓电量累积法累计速度的一种方法,在本发明的其他示例中,还有其他方法可用,如按照每个计算周期以0. 1%的速度降减少以S0C1为积分起点和以S0C2为积分起点所得的荷电状态估算值之间的差值的方法。 However, note that the value of the correction coefficient k is only a method to speed up or speed of the integrated electricity accumulated mitigation method, in other examples of the present invention, there are other methods available, such as at each calculation cycle of 0.1% S0C1 drop speed decreased to the starting point and the integral method to S0C2 as a difference between the estimated state of charge of a value obtained by integrating the starting point.

[0058] 为了对本发明实施例有更清楚的理解,以S0CDS0C2且在行车工况(动力电池的放电状态)下为例,结合图2所示,以S0C2为起点按照正常积分速度累计得到S0C5,以S0C1 为起点加快电量积分速度并得到S0C3 ;起初S0C3大于S0C5,但是由于S0C3在行车中加速减少(与S0C5相比),当S0C3到小于等于S0C5时,表明加快累计的电量积分法估算出的荷电状态值已经追上准确值,这时候将系数k值置为1。 [0058] For embodiments of the present invention is more clearly understood, an example in order to S0CDS0C2 and driving conditions (battery discharge state), in conjunction with FIG. 2, in accordance with normal integrated S0C2 starting speed obtained by accumulating S0C5, S0C1 power to accelerate the integration starting and speed obtained S0C3; S0C3 initially greater than S0C5, S0C3 in the road but since the acceleration decrease (as compared to S0C5), when the S0C3 less S0C5, show accumulated charge accelerated integration estimated the state of charge value has to catch the exact value of this time is set to the value of coefficient k 1. 其他情况S0C1〈S0C2或充电工况下, 类似。 Other cases S0C1 <S0C2 charging conditions or similar. 当表观荷电状态值已经与准确值相吻合的时候,采用正常速度的电量累积法继续估算S0C。 When the apparent state of charge value has a value accurately consistent with the, use of the cumulative amount of normal speed estimation method continues S0C.

[0059] 在本发明的一个实施例中,该方法还包括:显示动力电池实时的荷电状态的修正值。 [0059] In one embodiment of the present invention, the method further comprising: displaying the correction value of the real power of the battery state of charge. 例如通过仪表盘将动力电池实时的荷电状态的修正值显示给用户,以使用户实时了解动力电池实时的荷电状态。 For example, by the correction value dashboard real battery state of charge is displayed to the user so that the user real time understanding of the battery state of charge.

[0060] 根据本发明实施例的动力电池的荷电状态S0C修正方法,在表观S0C与真实S0C 之间存在差异时,通过减缓或加快电量累计法的累计速度来减小表观S0C与真实S0C之间的差异,最终达到一致的状态,从而可以避免S0C的突变引起驾驶员抱怨。 [0060] The state of charge of a battery powered embodiment S0C correction method of the embodiment of the present invention, when there is a difference between the apparent and real S0C S0C, by slowing or accelerating the speed of accumulated charge accumulation method to reduce the apparent and real S0C the difference between the S0C, and ultimately achieve a consistent state, thereby avoiding S0C mutations cause the driver to complain. 例如:如果原来BMS的存储器的S0C为50%,通过开路电压与S0C的关系在BMS开机时得出的准确的S0C为40%,如果直接用"40%"替换掉"50%",驾驶员将会将会产生不安。 Example: If the original memory of the BMS S0C 50%, obtained through the open-circuit voltage and the relationship of the boot S0C S0C accurate BMS is 40%, if the direct use of "40%" replace "50%", the driver It will be unrest. 采用本发明实施例的动力电池的荷电状态S0C修正方法,将开机修正隐藏在了行车或充电过程中,并采用了逐渐变化的方法,可避免上述问题的出现,减低用户的抱怨,具有不会引起驾驶员察觉的优点,避免驾驶员的不安。 With a power cell of the embodiment of the present invention, the state of charge S0C correction method, the power correction hidden in the driving or charging process, and using a method of gradually changing, can avoid such problems, reduce user complaints, with no It will cause the driver aware of the advantages and avoid the driver's anxiety. 另外,表观S0C (修正值)将会随着电量的消耗或增加呈线性变化,便于驾驶员预测剩余续驶里程。 The apparent S0C (correction value) will increase as the power consumption or changes linearly, to facilitate the driver prediction residual range.

[0061] 图3时根据本发明一个实施例的动力电池的荷电状态S0C修正装置的结构图。 [0061] FIG. 3 is a configuration diagram of the state of charge correction device S0C a power battery of an embodiment according to the present invention. 如图3所示,该动力电池的荷电状态S0C修正装置300,包括:获取模块310、判断模块320、修正系数生成模块330和修正模块340。 As shown, the battery state of charge correction device 3003 S0C, comprising: an obtaining module 310, a determining module 320, the correction coefficient generation module 330 and a correction module 340.

[0062] 其中,获取模块310用于获取动力电池当前的荷电状态的估计值和准确值。 [0062] where, the estimated value and accurate values ​​acquisition 310 for acquiring a current state of charge of the battery module. 判断模块320用于比较估计值和准确值,并根据比较结果判断是否对基于估计值得到的动力电池实时的荷电状态的计算值进行修正。 Analyzing module 320 for comparing the estimated value and an accurate value, and determines whether to estimate based on the real-time worth calcd state of charge of the battery power is corrected in accordance with the comparison result. 修正系数生成模块330用于根据动力电池的状态、 动力电池当前的荷电状态的估计值和准确值生成修正系数。 Correction coefficient generation module 330 according to the state of the battery power, and accurate estimate of the value of the current state of charge of the battery to generate a correction coefficient. 修正模块340用于根据实时采集的动力电池的输入输出电量、修正系数和估计值计算动力电池实时的荷电状态的修正值。 Correction module 340 based on the input of output power of the battery acquired in real time, the value of the correction coefficient and the correction value calculating estimated battery state of charge in real time.

[0063] 在本发明的一个实施例中,动力电池实时的荷电状态的修正值通过如下公式得到: [0063] In one embodiment of the present invention, the correction value of the real power of the battery state of charge is obtained by the following equation:

[0064] [0064]

Figure CN104241713AD00101

[0065] 其中,S0Q为估计值,S0Ct为动力电池在t时刻的荷电状态的修正值,k为修正系数,η为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 [0065] wherein, S0Q is the estimated value, S0Ct correction value state of charge of the battery at time t, k is a correction coefficient, η the charge-discharge efficiency of battery, I is the power of the battery charge and discharge current, c is battery capacity.

[0066] 具体地说,结合图2所示,例如在计算得到S0C2与S0C1,并在两者之间存在差异时。 [0066] Specifically, in conjunction with FIG. 2, for example, when the calculated S0C2 and S0C1, and there is a difference therebetween. 可通过电池管理系统BMS存储器上述两个S0C,即S0C1和S0C2, S0C2是更符合电池实际荷电状态的,而S0C1是驾驶员原来一直关注其变化因而比较熟悉的S0C值,这时候如果在接下来的车辆运行过程中直接用S0C2替换掉S0C1作为电量积分的初值,特别是在没有行车或充电(没有电流)的情况下进行替换,驾驶员会觉察到明显的S0C突变过程,将会产生抱怨。 Can both S0C, namely S0C1 and S0C2, S0C2 is more in line with BMS battery management system memory by actual battery state of charge, and S0C1 the driver had been concerned about the changes and thus more familiar S0C value at this time if the ground during vehicle operation directly down the replacement S0C2 out as S0C1 Initial charge integration, especially in the absence of replacement or charge driving (no current), the driver will perceive the distinct S0C mutation, will produce complain.

[0067] 此时,本发明的实施例的方法仍然以S0C1作为接下来车辆运行过程中电量累计的积分起点,有两种情况,S0C1彡S0C2和S0CKS0C2 ;在S0C1彡S0C2时,即准确值S0C2低于显示值(估计值S0C1)的情况下,又分为两种情况,充电工况(动力电池的充电状态)和放电工况(动力电池的放电状态),在充电工况下,电池组的真实荷电量在逐渐增加,这时候如果按照电量积分法进行S0C的估算,由于表观荷电状态值(以S0C1为积分起点的荷电状态值)高于真实的S0C,表观荷电状态将会提前达到充电终点100% ;而在放电工况下,由于电池组的真实荷电量在逐渐减小,表观S0C将会延后达到放电终点;本发明实施例的方法采用减缓或加快表观S0C (计算值)累计速度的方法来使表观S0C与真实S0C吻合,所采用的方案可以有多种,本实施例动力电池实时的荷电状态的修正值通过如下公式得到: [0067] In this case, the method of the embodiments of the present invention as the subsequent still S0C1 charge accumulated during vehicle operation starting points, there are two cases, San S0C2 and S0C1 S0CKS0C2; Pie at when S0C1 S0C2, S0C2 i.e. exact value is lower than the displayed value (estimated value S0C1), is divided into two cases, the charging conditions (battery state of charge) and discharge Electrical conditions (battery discharge state), the charging conditions, the battery pack the real power in the Netherlands increased gradually, if at this time to estimate the S0C according to the power integration method, due to the apparent state of charge value (to S0C1 as state of charge value of the integral starting point) higher than the real S0C, the apparent state of charge reaches the end of charge will advance to 100%; in the discharge condition, since the real battery charge amount is gradually reduced, the apparent delay will S0C reaches the discharge end; method of an embodiment of the present invention is employed to slow or speed up table View S0C (calc) accumulated to the apparent speed of the method with the real S0C S0C coincide, the program may be employed there are various real-time correction value Example battery state of charge of the present embodiment by the following equation:

[0068] [0068]

Figure CN104241713AD00102

[0069] 其中,S0Q为估计值,S0Ct为动力电池在t时刻的荷电状态的修正值,k为修正系数,η为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 [0069] wherein, S0Q is the estimated value, S0Ct correction value state of charge of the battery at time t, k is a correction coefficient, η the charge-discharge efficiency of battery, I is the power of the battery charge and discharge current, c is battery capacity.

[0070] 该修正系数k在需要延缓积分速度时采用小于1的数(如0. 5),而在需要加快积分速度的时候采用大于1的数(如2),修正系数的数值大小视S0C1和S0C2之间差值而定, 且为可标定值,由实车测试得出。 [0070] The correction coefficient k using the number (e.g., 0.5) of less than 1 when desirable to slow the speed of integration, while the use of a number greater than 1 (e.g. 2), the correction coefficient values ​​depending on the size S0C1 when needed to accelerate the integration speed S0C2 and the difference between the set and is a calibratable value, obtained by the real vehicle test.

[0071] 在表观S0C与真实S0C吻合后,可将该系数置为1。 [0071] After the apparent S0C S0C coincide with the real, the coefficient may be set to 1. 即本发明实施例的方法可根据实时采集的动力电池的输入输出电量和准确值计算动力电池实时的荷电状态的精确值;当动力电池实时的荷电状态的修正值与对应时刻的动力电池实时的荷电状态的精确值之差小于预设值时,停止对动力电池实时的荷电状态进行修正。 I.e., method embodiments of the present invention may be the exact value according to the real-time state of charge of input and output real-time acquisition of the battery power and accuracy values ​​calculated battery power; when the battery correction value battery in real time the state of charge corresponding to the time exact value of the difference between the real state of charge is less than a predetermined value, stopping the battery state of charge in real-time correction.

[0072] 另外,在S0C1〈S0C2下,判断车辆是否处于行车工况(动力电池的充电状态),在行车工况下,减缓表观S0C的累计速度,在充电工况下,加快S0C的累计速度。 [0072] Further, in the S0C1 <S0C2, determines whether the vehicle is in the driving condition (traction battery charge state), the driving conditions, the apparent slow rate S0C is accumulated, the charging conditions, the cumulative accelerate S0C speed. 减缓和加快的 Slow down and speed up the

Figure CN104241713AD00103

•1 速度,同样由修正系数k决定。 • 1 speed, k is determined by the same correction factor. 例如:在放电过程中,k值取上述的在充电过程'2 中,k例如取上述的』 For example: during discharge, k is the value taken during the charging process described above apos 2, k take the above example of "

Figure CN104241713AD00104

[0073] 采用如上取值的优点是在整个电量累计法估算S0C的过程中,估算出的S0C都是匀速变化,不会出现突变,有利于驾驶员估算剩余续驶里程;另外采用上述公式进行k的取值时,表观S0C与准确的S0C会同时达到100%或0%。 [0073] The advantages of using the above values ​​is accumulated in the whole amount estimation process S0C the method is estimated S0C uniform change, mutation does not occur, in favor of the driver estimated residual range; Further the above formula when the value of k, the apparent S0C accurate S0C simultaneously reach 100% or 0%. 但是需要注意的是,修正系数k值只是加快或减缓电量累积法累计速度的一种方法,在本发明的其他示例中,还有其他方法可用,如按照每个计算周期以〇. 1%的速度降减少以S0C1为积分起点和以S0C2为积分起点所得的荷电状态估算值之间的差值的方法。 However, note that the value of the correction coefficient k is only a method to speed up or speed of the integrated electricity accumulated mitigation method, in other examples of the present invention, there are other methods available, such as a square for each calculation cycle to 1% by S0C1 drop speed decreased to the starting point and the integral method to S0C2 as a difference between the estimated state of charge of a value obtained by integrating the starting point.

[0074] 为了对本发明实施例有更清楚的理解,以S0CDS0C2且在行车工况(动力电池的放电状态)下为例,结合图2所示,以S0C2为起点按照正常积分速度累计得到S0C5,以S0C1 为起点加快电量积分速度并得到S0C3 ;起初S0C3大于S0C5,但是由于S0C3在行车中加速减少(与S0C5相比),当S0C3到小于等于S0C5时,表明加快累计的电量积分法估算出的荷电状态值已经追上准确值,这时候将系数k值置为1。 [0074] For embodiments of the present invention is more clearly understood, an example in order to S0CDS0C2 and driving conditions (battery discharge state), in conjunction with FIG. 2, in accordance with normal integrated S0C2 starting speed obtained by accumulating S0C5, S0C1 power to accelerate the integration starting and speed obtained S0C3; S0C3 initially greater than S0C5, S0C3 in the road but since the acceleration decrease (as compared to S0C5), when the S0C3 less S0C5, show accumulated charge accelerated integration estimated the state of charge value has to catch the exact value of this time is set to the value of coefficient k 1. 其他情况S0C1〈S0C2或充电工况下, 类似。 Other cases S0C1 <S0C2 charging conditions or similar. 当表观荷电状态值已经与准确值相吻合的时候,采用正常速度的电量累积法继续估算S0C。 When the apparent state of charge value has a value accurately consistent with the, use of the cumulative amount of normal speed estimation method continues S0C.

[0075] 在本发明的一个实施例中,该装置还包括:显示模块(图中未示出),用于显示动力电池实时的荷电状态的修正值。 [0075] In one embodiment of the present invention, the apparatus further comprising: a display module (not shown) for displaying real-time correction value battery state of charge. 即显示动力电池实时的荷电状态的修正值。 Correction value is displayed in real-time battery state of charge. 例如通过仪表盘(作为显示模块使用)将动力电池实时的荷电状态的修正值显示给用户,以使用户实时了解动力电池实时的荷电状态。 For example, by the dashboard (as a display module) the correction value of real battery state of charge to the user, to enable the user to know in real time the real battery state of charge.

[0076] 根据本发明实施例的动力电池的荷电状态S0C修正装置,在表观S0C与真实S0C 之间存在差异时,通过减缓或加快电量累计法的累计速度来减小表观S0C与真实S0C之间的差异,最终达到一致的状态,从而可以避免S0C的突变引起驾驶员抱怨。 [0076] The state of charge of a battery powered embodiment S0C correction apparatus of the embodiment of the present invention, when there is a difference between the apparent and real S0C S0C, by slowing or accelerating the speed of accumulated charge accumulation method to reduce the apparent and real S0C the difference between the S0C, and ultimately achieve a consistent state, thereby avoiding S0C mutations cause the driver to complain. 例如:如果原来BMS的存储器的S0C为50%,通过开路电压与S0C的关系在丽S开机时得出的准确的S0C为40%,如果直接用"40%"替换掉"50%",驾驶员将会将会产生不安。 Example: If the original memory of the BMS S0C 50%, obtained through the open-circuit voltage and the relationship in Korea S0C boot S0C S is 40% accurate, if the direct use of "40%" replace "50%", the driver members will be unrest. 采用本发明实施例的动力电池的荷电状态S0C修正装置,将开机修正隐藏在了行车或充电过程中,并采用了逐渐变化的方法,可避免上述问题的出现,减低用户的抱怨,具有不会引起驾驶员察觉的优点,避免驾驶员的不安。 The state of charge S0C correcting means with a power cell of the embodiment of the present invention, the power correction hidden in the driving or charging process, and using a method of gradually changing, can avoid such problems, reduce user complaints, with no It will cause the driver aware of the advantages and avoid the driver's anxiety. 另外,表观S0C (修正值)将会随着电量的消耗或增加呈线性变化,便于驾驶员预测剩余续驶里程。 The apparent S0C (correction value) will increase as the power consumption or changes linearly, to facilitate the driver prediction residual range.

[0077] 在本说明书的描述中,参考术语"一个实施例"、"一些实施例"、"示例"、"具体示例"、或"一些示例"等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。 [0077] In the description of the present specification, reference to the term "one embodiment," "some embodiments", "an example", "a specific example", or "some examples" means that a description of the exemplary embodiment or embodiments described a particular feature, structure, material, or characteristic is included in at least one embodiment of the present invention, embodiments or examples. 在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或示例。 In the present specification, a schematic representation of the above terms necessarily referring to the same embodiment or example. 而且,描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。 Furthermore, the particular features, structures, materials, or characteristics described embodiments or examples may be at any one or more in a proper manner.

[0078] 尽管已经示出和描述了本发明的实施例,本领域的普通技术人员可以理解:在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由权利要求及其等同限定。 [0078] While there has been illustrated and described embodiments of the present invention, those of ordinary skill in the art can be appreciated: that various changes may be made to these embodiments without departing from the principles and spirit of the invention, modifications, substitutions and modifications, the scope of the invention defined by the appended claims and their equivalents.

Claims (10)

  1. 1. 一种动力电池的荷电状态SOC修正方法,其特征在于,包括以下步骤: 获取动力电池当前的荷电状态的估计值和准确值; 比较所述估计值和准确值,并根据比较结果判断是否对基于所述估计值得到的所述动力电池实时的荷电状态的计算值进行修正; 如果是,则根据所述动力电池的状态、所述动力电池当前的荷电状态的估计值和准确值生成修正系数;以及根据实时采集的所述动力电池的输入输出电量、所述修正系数和所述估计值计算所述动力电池实时的荷电状态的修正值。 The state of charge SOC correcting method of a power cell, characterized by comprising the steps of: obtaining an estimated value and an accurate value of the current state of charge of the battery; comparing the estimated value and an accurate value, and the result of the comparison Calcd for determining whether worth based on the estimated battery power to the real-time state of charge corrected; estimate if yes, according to the state of the battery, the current state of charge of the battery and exact value generating correction coefficient; according to the input of output power and the power of real-time acquisition of the battery, the estimated value of the correction coefficient and calculating the correction value of the real power of the battery state of charge.
  2. 2. 根据权利要求1所述的方法,其特征在于,所述动力电池实时的荷电状态的修正值通过如下公式得到: 2. The method according to claim 1, characterized in that the correction value of the real power of the battery state of charge is obtained by the following equation:
    Figure CN104241713AC00021
    其中,SOCtl为所述估计值,SOCt为动力电池在t时刻的荷电状态的修正值,k为修正系数,n为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 Wherein, SOCtl is the estimated value, SOCt correction value for the battery state of charge at the time t, k is the correction coefficient, n is the charge-discharge efficiency of the battery power, I is the power of the battery charge and discharge current, c is the battery capacity .
  3. 3. 根据权利要求1或2所述的方法,其特征在于,其中, 如果所述动力电池的状态为充电状态且所述估计值大于或等于所述准确值,或者所述动力电池的状态为放电状态且所述估计值小于所述准确值,则所述修正系数取值范围位于(〇,1)之间的值; 如果所述动力电池的状态为充电状态且所述估计值小于所述准确值,或者所述动力电池的状态为放电状态且所述估计值大于或等于所述准确值,则所述修正系数取值为大于1 的数值。 3. The method of claim 1 or claim 2, wherein, wherein, if the estimated value is greater than the state of the battery and the state of charge is equal to the exact value or, or the state of the power cell is discharge state and the estimated value is less than the exact value, the correction coefficient is located in the range between (square, 1) value; if the state is the state of charge of the battery power and the estimated value is less than the exact value, or the power status of the battery discharge state and the estimated value is greater than or equal to the exact value, the value of the correction coefficient is a value greater than 1.
  4. 4. 根据权利要求3所述的方法,其特征在于,其中,如果所述动力电池的状态为放电状态,则所述修正系数为: 4. The method according to claim 3, characterized in that, wherein, if the state of the battery is discharged state, the correction coefficient is:
    Figure CN104241713AC00022
    ,其中,所述k为修正系数,所述socl为所述估计值,所述soc2为所述准确值。 , Wherein k is the correction factor, the estimated value of the socl, the exact value of the soc2.
  5. 5. 根据权利要求3所述的方法,其特征在于,其中,如果所述动力电池的状态为充电状态,则所述修正系数为: 5. The method according to claim 3, characterized in that, wherein if the state is the state of charge of the battery power, then the correction factor is:
    Figure CN104241713AC00023
    ,其中,所述k为修正系数,所述socl为所述估计值,所述soc2为所述准确值。 , Wherein k is the correction factor, the estimated value of the socl, the exact value of the soc2.
  6. 6. 根据权利要求1所述的方法,还包括: 根据所述实时采集的所述动力电池的输入输出电量和所述准确值计算所述动力电池实时的荷电状态的精确值; 当所述动力电池实时的荷电状态的修正值与对应时刻的所述动力电池实时的荷电状态的精确值之差小于预设值时,停止对所述动力电池实时的荷电状态进行修正。 6. The method according to claim 1, further comprising: a battery power input to the real-time collection of output power and the power value calculating accurate real battery state of charge based on the exact value; when the the difference between the exact value of the correction value corresponding to the power battery power battery real time state of charge of the real state of charge is less than a predetermined value, stopping the battery state of charge in real-time correction.
  7. 7. 根据权利要求1所述的方法,还包括: 显示所述动力电池实时的荷电状态的修正值。 7. The method according to claim 1, further comprising: displaying the correction value of the real power of the battery state of charge.
  8. 8. -种动力电池的荷电状态SOC修正装置,其特征在于,包括: 获取模块,用于获取动力电池当前的荷电状态的估计值和准确值; 判断模块,用于比较所述估计值和准确值,并根据比较结果判断是否对基于所述估计值得到的所述动力电池实时的荷电状态的计算值进行修正; 修正系数生成模块,用于根据所述动力电池的状态、所述动力电池当前的荷电状态的估计值和准确值生成修正系数;以及修正模块,用于根据实时采集的所述动力电池的输入输出电量、所述修正系数和所述估计值计算所述动力电池实时的荷电状态的修正值。 8. - kind of battery state of charge SOC correction device comprising: an obtaining module, configured to obtain an estimated value and an accurate value of the current state of charge of the battery; determining means for comparing the estimated value and the exact value, according to whether the judgment result of the comparison of the calculated mean values ​​of the real battery state of charge based on the estimated correction; the correction coefficient generation module, according to the state of the battery power, the exact value of the current value and the estimated state of charge of the battery to generate a correction coefficient; and a correction module for input and output of the battery power of the real-time acquisition of the correction coefficient and calculating the estimated value of the battery the value of real-time correction of the state of charge.
  9. 9. 根据权利要求8所述的装置,其特征在于,所述动力电池实时的荷电状态的修正值通过如下公式得到: 9. The apparatus according to claim 8, characterized in that the correction value of the real power of the battery state of charge is obtained by the following equation:
    Figure CN104241713AC00031
    其中,SOCtl为所述估计值,SOCt为动力电池在t时刻的荷电状态的修正值,k为修正系数,n为动力电池充放电效率,I为动力电池充放电电流,c为动力电池容量。 Wherein, SOCtl is the estimated value, SOCt correction value for the battery state of charge at the time t, k is the correction coefficient, n is the charge-discharge efficiency of the battery power, I is the power of the battery charge and discharge current, c is the battery capacity .
  10. 10. 根据权利要求8所述的装置,其特征在于,还包括: 显示模块,用于显示所述动力电池实时的荷电状态的修正值。 10. The apparatus according to claim 8, characterized in that, further comprising: a display means for displaying the correction value of the real power of the battery state of charge.
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