WO2021056864A1 - 电池剩余能量的估算方法、装置及车辆 - Google Patents
电池剩余能量的估算方法、装置及车辆 Download PDFInfo
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- WO2021056864A1 WO2021056864A1 PCT/CN2019/126405 CN2019126405W WO2021056864A1 WO 2021056864 A1 WO2021056864 A1 WO 2021056864A1 CN 2019126405 W CN2019126405 W CN 2019126405W WO 2021056864 A1 WO2021056864 A1 WO 2021056864A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- the present invention relates to the field of battery technology, and in particular to a method, device and vehicle for estimating the remaining energy of a battery.
- the state of energy (SOE) is an important state indicator of the power battery of an electric vehicle.
- the remaining battery energy SOE of the lithium-ion battery predicted by the identification and prediction of the electric vehicle working condition can be calculated by the remaining battery energy SOE.
- the battery remaining energy SOE can reflect the current remaining energy state of the battery, which is divided into theoretical remaining energy and actual remaining energy. Since the theoretical remaining energy cannot accurately reflect the current remaining energy state of the battery, it is particularly important to estimate the actual remaining energy of the battery. .
- the present invention aims to solve one of the technical problems in the related art at least to a certain extent.
- the first object of the present invention is to provide a method for estimating the remaining energy of the battery, which can more accurately reflect the current remaining energy state of the battery.
- the second object of the present invention is to provide a device for estimating the remaining energy of the battery.
- the third object of the present invention is to provide a vehicle.
- an embodiment of the first aspect of the present invention proposes a method for estimating the remaining energy of a battery, including: obtaining the theoretical remaining energy of the battery; obtaining the ratio of the discharged energy of the battery within a set time before the current moment; Obtain the health status of the battery; and calculate the actual remaining energy of the battery according to the theoretical remaining energy, the discharge energy ratio, and the health status.
- the method for estimating the remaining energy of the battery in the embodiment of the present invention obtains the theoretical remaining energy of the battery, the ratio of the discharged energy of the battery within a set time before the current moment, and the state of health of the battery, according to the theoretical remaining energy, the ratio of the discharged energy and the state of health , Calculate the actual remaining energy of the battery, the actual remaining energy of the battery can more accurately reflect the current remaining energy state of the battery.
- an embodiment of the second aspect of the present invention proposes a battery remaining energy estimation device, including: a first acquisition module for acquiring the theoretical remaining energy of the battery; a second acquisition module for acquiring the battery The discharge energy ratio within a set time before the current moment; the third acquisition module is used to acquire the state of health of the battery; the calculation module is used to calculate the theoretical remaining energy, the discharge energy ratio, and the health State, calculate the actual remaining energy of the battery.
- the device for estimating the remaining energy of the battery proposed in the embodiment of the present invention obtains the theoretical remaining energy of the battery, the ratio of the discharged energy of the battery within a set time before the current moment, and the state of health of the battery, according to the theoretical remaining energy, the ratio of the discharged energy and the health State, the actual remaining energy of the battery is obtained, and the actual remaining energy of the battery can more accurately reflect the current remaining energy state of the battery.
- an embodiment of the third aspect of the present invention provides a vehicle, which includes the device for estimating the remaining battery energy according to the embodiment of the second aspect of the present invention.
- FIG. 1 is a schematic flowchart of a method for estimating remaining battery energy according to an embodiment of the present invention
- FIG. 2 is a schematic flowchart of obtaining the discharge energy ratio of a battery within a set time before the current time according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of obtaining a discharge rate of a battery within a set time before the current time according to an embodiment of the present invention
- FIG. 4 is a schematic flowchart of obtaining the equivalent current of the battery within a set time before the current time according to an embodiment of the present invention
- FIG. 5 is a schematic flowchart of obtaining the predicted temperature of the battery unit time after the current time according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram of a device for estimating remaining battery energy provided by an embodiment of the present invention.
- Fig. 7 is a schematic structural diagram of a vehicle provided by an embodiment of the present invention.
- FIG. 1 is a schematic flowchart of a method for estimating remaining battery energy according to an embodiment of the present invention.
- the method for estimating remaining battery energy in the embodiments of the present invention can be applied to various existing devices that use batteries as energy sources, such as vehicles, tablet computers, notebook computers, personal computers, smart phones, and so on.
- the method for estimating the remaining energy of the battery includes the following steps:
- the actual parameters of the battery can be collected, such as the current remaining capacity percentage of the battery (State Of Charge, SOC for short), etc., and the theoretical remaining energy of the battery can be obtained according to the collected actual parameters of the battery.
- the current remaining capacity percentage SOC of the battery can be obtained, and the theoretical remaining energy can be obtained according to the corresponding relationship between the remaining capacity percentage SOC and the pre-stored remaining capacity percentage SOC and the theoretical remaining energy.
- the corresponding relationship between the remaining capacity percentage SOC and the theoretical remaining energy can be obtained by charging and discharging the battery.
- S102 Obtain a discharge energy ratio of the battery within a set time before the current time.
- the set time can be set by the user as needed, for example, it can be set to 30 minutes.
- the discharge energy ratio Kegy is the ratio of the discharged energy to the rated energy.
- S103 Obtain the state of health (State of Health, SOH for short) of the battery.
- the current state of health SOH of the battery is obtained.
- the actual remaining energy RealEgy of the battery is calculated according to the theoretical remaining power Egy_table, the discharge energy ratio Kegy, and the state of health SOH based on the various data obtained in the above steps.
- the theoretical remaining energy of the battery, the discharge energy ratio of the battery within the set time before the current moment, and the state of health SOH of the battery are obtained. According to the theoretical remaining energy, the ratio of discharge energy and the state of health SOH, the battery’s The actual remaining energy, the actual remaining energy of the battery can more accurately reflect the current remaining energy state of the battery.
- step S102 in the foregoing embodiment may specifically include the following steps:
- S201 Acquire the discharge rate of the battery within a set time before the current time.
- the discharge rate is a measure of the discharge speed, which refers to the current value required by the battery to discharge its rated capacity at a specified time. Get the set time of the battery in the past, for example, the discharge rate DchaC within 30 minutes.
- the unit time can be set to 1 minute, and the unit time of the battery after the current time can be predicted according to the temperature of the battery at the current time, for example, the temperature after 1 minute is the predicted temperature Tpred.
- the discharge energy ratio Kegy can be obtained according to the correspondence between the discharge rate DchaC and the predicted temperature Tpred obtained in steps S201 and S202, and the pre-stored discharge rate DchaC, the predicted temperature Tpred, and the discharge energy ratio Kegy.
- the corresponding relationship between the discharge rate DchaC, the predicted temperature Tpred, and the discharge energy ratio Kegy can be obtained by performing a discharge test (test) on the battery.
- the ratio of the discharged energy to the rated energy is obtained, that is, the discharge energy ratio Kegy, which is recorded as the discharge rate DchaC, the predicted temperature Tpred and the discharge energy
- the discharge energy ratio Kegy of the battery is obtained by looking up the table.
- step S201 in the foregoing embodiment may specifically include the following steps:
- S301 Obtain an equivalent current of the battery within a set time before the current time.
- the set time can be set to 30 minutes to obtain the equivalent current Ieq of the battery in the past 30 minutes.
- step S301 in the foregoing embodiment may specifically include the following steps:
- S401 Obtain the average current of the battery per unit time within a set time before the current time.
- a 30-dimensional average current array can be established. The initial value is 1/3C. After every 1 minute of operation, the average current is updated to the last value of the array, and the first value is discarded to form the battery’s total value in the past 30 minutes.
- a 30-dimensional average current array composed of average currents.
- the equivalent current within the set time is obtained according to the average current per minute of the battery in the past 30 minutes.
- the equivalent current Ieq in the past 30 minutes can be calculated according to the following recurrence formula: Among them, I[k] represents the average current in the kth minute, and ⁇ is a constant, for example, it can be set to 0.05, that is, the closer the distance to the current moment is, the greater the weight of the average current in the minute when calculating the equivalent current .
- step S202 in the foregoing embodiment may specifically include the following steps:
- S501 Obtain an average temperature rise of the battery corresponding to a unit time within a set time before the current time.
- the temperature rise is the elevated temperature.
- the set time can be set to 30 minutes, and the unit time can be set to 1 minute to obtain the average temperature rise of the battery per minute in the past 30 minutes.
- the average temperature rise of the battery per unit time within a set time before the current time can be obtained, and the sum of the average temperature rise per unit time within the set time can be calculated, and the calculation is based on the sum value.
- a 30-dimensional average temperature rise array can be established, and the temperature rise value can be obtained by looking up the table according to the battery temperature and ambient temperature.
- the average temperature rise per minute is calculated, and the last value of the array is updated, and the first value is discarded to form the battery in the past.
- the 30-dimensional average temperature rise array is composed of the average temperature rise per minute within 30 minutes. Sum the average temperature rise array and take the average value as the average temperature rise DeltaTavg corresponding to each minute in the past 30 minutes.
- S502 Obtain the predicted temperature according to the average temperature rise corresponding to the unit time within the set time and the current temperature of the battery.
- the current temperature of the battery is the temperature of the single cell with the lowest temperature in the battery pack. Calculate the sum of the average temperature rise DeltaTavg per unit time within the set time and the current temperature Tmin of the battery to obtain the predicted temperature Tpred.
- the present invention also provides a device for estimating the remaining energy of the battery.
- Fig. 6 is a schematic structural diagram of a device for estimating remaining battery energy provided by an embodiment of the present invention. As shown in FIG. 6, the device for estimating the remaining energy of the battery includes: a first acquisition module 61, a second acquisition module 62, a third acquisition module 63, and a calculation module 64.
- the first obtaining module 61 is used to obtain the theoretical remaining energy of the battery.
- the second acquiring module 62 is configured to acquire the discharge energy ratio of the battery within a set time before the current time.
- the third obtaining module 63 is used to obtain the health state SOH of the battery.
- the calculation module 64 is configured to calculate the actual remaining energy of the battery according to the theoretical remaining energy, the discharge energy ratio, and the state of health SOH.
- the first obtaining module 61 may be specifically configured to: obtain the current remaining capacity percentage SOC of the battery; and obtain the theoretical remaining energy according to the remaining capacity percentage SOC and the corresponding relationship between the pre-stored remaining capacity percentage SOC and the theoretical remaining energy.
- the second obtaining module 62 may be specifically configured to: obtain the discharge rate of the battery within a set time before the current time; obtain the predicted temperature of the battery after the current time per unit time; and obtain according to the discharge rate and the predicted temperature Discharge energy ratio.
- the second obtaining module 62 may be specifically configured to: obtain the equivalent current of the battery within a set time before the current moment; and obtain the discharge rate according to the equivalent current and the rated capacity of the battery.
- the second obtaining module 62 may be specifically configured to: obtain the average current of the battery per unit time within a set time before the current time; and obtain the average current per unit time within the set time The equivalent current.
- the second acquiring module 62 may be specifically configured to: acquire the average temperature rise corresponding to the unit time within a set time before the current time; according to the average temperature rise corresponding to the unit time within the set time and the current temperature of the battery , Get the predicted temperature.
- the second obtaining module 62 may be specifically configured to: obtain the average temperature rise per unit time of the battery within a set time before the current moment; calculate the sum of the average temperature rise per unit time within the set time; According to the sum value, the average temperature rise corresponding to the unit time within the set time is calculated.
- the theoretical remaining energy of the battery, the discharge energy ratio of the battery within the set time before the current moment, and the state of health SOH of the battery are obtained. According to the theoretical remaining energy, the ratio of discharge energy and the state of health SOH, the battery’s The actual remaining energy, the actual remaining energy of the battery can more accurately reflect the current remaining energy state of the battery.
- Fig. 7 is a schematic structural diagram of a vehicle provided by an embodiment of the present invention.
- the vehicle 71 includes: a device 72 for estimating the remaining battery energy as shown in the above-mentioned embodiment.
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Abstract
一种电池剩余能量的估算方法、装置及车辆。其中，估算方法包括：获取电池的理论剩余能量（S101）；获取电池在当前时刻之前的设定时间内的放电能量比率（S102）；获取电池的健康状态（S103）；根据理论剩余能量、放电能量比率和健康状态，计算得到电池的实际剩余能量（S104）。这种电池剩余能量的估算方法、装置及车辆，可以更准确地反映当前电池的剩余能量状态。
Description
本发明涉及电池技术领域，尤其涉及一种电池剩余能量的估算方法、装置及车辆。
目前，为了更好的节约能源以及保护环境，电动汽车的发展越来越成为时代的主流趋势。其中电池剩余能量(state of energy，简称SOE)是电动汽车动力电池的重要状态指标，通过对电动汽车工况识别预测的锂离子电池的电池剩余能量SOE进行估计，可以通过电池剩余能量SOE计算出电动汽车可以继续行驶的剩余里程。
电池剩余能量SOE能够反映当前电池的剩余能量状态，分为理论剩余能量和实际剩余能量，由于理论剩余能量不能准确的反映当前电池的剩余能量状态，因此对电池的实际剩余能量的估算显得尤为重要。
发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本发明的第一个目的在于提供一种电池剩余能量的估算方法，可以更准确的反映当前电池的剩余能量状态。
本发明的第二个目的在于提出一种电池剩余能量的估算装置。
本发明的第三个目的在于提出一种车辆。
为达上述目的，本发明第一方面实施例提出了一种电池剩余能量的估算方法，包括：获取电池的理论剩余能量；获取所述电池在当前时刻之前的设定时间内的放电能量比率；获取所述电池的健康状态；根据所述理论剩余能量、所述放电能量比率和所述健康状态，计算得到所述电池的实际剩余能量。
本发明实施例的电池剩余能量的估算方法，获取电池的理论剩余能量、电池在当前时刻之前的设定时间内的放电能量比率和电池的健康状态，根据理论剩余能量、放电能量比率和健康状态，计算得到电池的实际剩余能量，该电池的实际剩余能量可以更准确的反映当前电池的剩余能量状态。
为达上述目的，本发明第二方面实施例提出了一种电池剩余能量的估算装置，包括：第一获取模块，用于获取电池的理论剩余能量；第二获取模块，用于获取所述电池在当前 时刻之前的设定时间内的放电能量比率；第三获取模块，用于获取所述电池的健康状态；计算模块，用于根据所述理论剩余能量、所述放电能量比率和所述健康状态，计算得到所述电池的实际剩余能量。
本发明实施例提出的电池剩余能量的估算装置，获取电池的理论剩余能量、电池在当前时刻之前的设定时间内的放电能量比率和电池的健康状态，根据理论剩余能量、放电能量比率和健康状态，得到电池的实际剩余能量，该电池的实际剩余能量可以更准确的反映当前电池的剩余能量状态。
为达上述目的，本发明第三方面实施例提出了一种车辆，包括：如本发明第二方面实施例所述的电池剩余能量的估算装置。
本发明附加的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。
本发明上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：
图1为本发明实施例所提供的一种电池剩余能量的估算方法的流程示意图；
图2为本发明实施例所提供的获取电池在当前时刻之前的设定时间内的放电能量比率的流程示意图；
图3为本发明实施例所提供的获取电池在当前时刻之前的设定时间内的放电倍率的流程示意图；
图4为本发明实施例所提供的获取电池在当前时刻之前的设定时间内的等效电流的流程示意图；
图5为本发明实施例所提供的获取电池在当前时刻之后的单位时间后的预测温度的流程示意图；
图6为本发明实施例所提供的一种电池剩余能量的估算装置的结构示意图；
图7为本发明实施例所提供的一种车辆的结构示意图。
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。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
下面参考附图描述本发明实施例的电池剩余能量的估算方法、装置及车辆。
图1为本发明实施例所提供的一种电池剩余能量的估算方法的流程示意图。本发明实施例的电池剩余能量的估算方法可应用于现有的各种采用电池作为能量来源的设备中，例如车辆、平板电脑、笔记本电脑、个人电脑、智能手机等中。如图1所示，该电池剩余能量的估算方法包括如下步骤：
S101，获取电池的理论剩余能量。
具体的，可以采集电池的实际参数，例如电池当前的剩余容量百分比(State Of Charge，简称SOC)等，根据采集的电池的实际参数得到电池的理论剩余能量。作为一种可行实施方式，可以获取电池当前的剩余容量百分比SOC，根据剩余容量百分比SOC和预先存储的剩余容量百分比SOC和理论剩余能量的对应关系，得到理论剩余能量。其中，剩余容量百分比SOC和理论剩余能量的对应关系可以通过对电池进行充放电试验获得。例如通过对电池按照1/3C从剩余容量百分比SOC为0％充电至100％，静置1小时(h)后再使用1/3C进行放电，记录放电过程中剩余容量百分比SOC和剩余能量的关系得到用于表示剩余容量百分比SOC和理论剩余能量的对应关系的一维表并存储，获取到电池当前的剩余容量百分比SOC后，通过查表得到电池的理论剩余电量Egy_table。
S102，获取电池在当前时刻之前的设定时间内的放电能量比率。
具体的，设定时间可以由用户根据需要自行设置，例如可以设置为30分钟。放电能量比率Kegy即放出能量与额定能量的比值。
S103，获取电池的健康状态(State of Health，简称SOH)。
具体的，获取电池当前的健康状态SOH。
S104，根据理论剩余能量、放电能量比率和健康状态SOH，计算得到电池的实际剩余能量。
具体的，根据上述步骤得到的各项数据理论剩余电量Egy_table、放电能量比率Kegy和健康状态SOH，计算得到电池的实际剩余能量RealEgy。作为一种可行的实施方式，可以通过以下公式计算得到电池的实际剩余能量RealEgy＝Egy_table*Kegy*SOH。
本实施例中，获取电池的理论剩余能量、电池在当前时刻之前的设定时间内的放电能量比率和电池的健康状态SOH，根据理论剩余能量、放电能量比率和健康状态SOH，计算得到电池的实际剩余能量，该电池的实际剩余能量可以更准确的反映当前电池的剩余能量状态。
进一步的，如图2所示，上述实施例中的步骤S102具体可包括以下步骤：
S201，获取电池在当前时刻之前的设定时间内的放电倍率。
具体的，放电倍率是放电快慢的一种量度，指电池在规定的时间放出其额定容量所需要的电流值。获取电池在过去的设定时间，例如30分钟内的放电倍率DchaC。
S202，获取电池在当前时刻之后的单位时间后的预测温度。
具体的，单位时间可设置为1分钟，可以根据电池当前时刻的温度预测电池在当前时刻之后的单位时间，例如1分钟后的温度即预测温度Tpred。
S203，根据放电倍率和预测温度，得到放电能量比率。
具体的，可以根据步骤S201和S202获取到的放电倍率DchaC和预测温度Tpred，以及预先存储的放电倍率DchaC、预测温度Tpred和放电能量比率Kegy之间的对应关系，得到放电能量比率Kegy。其中，放电倍率DchaC、预测温度Tpred和放电能量比率Kegy之间的对应关系可以通过对电池进行放电试验(测试)获得。例如，通过在不同放电倍率DchaC和不同温度Tpred条件下对电池进行放电测试，得到放出能量与额定能量的比值，即放电能量比率Kegy，记录为用于表示放电倍率DchaC、预测温度Tpred和放电能量比率Kegy之间的对应关系的二维表并存储，获取到后电池的放电倍率DchaC和预测温度Tpred后，通过查表得到电池的放电能量比率Kegy。
进一步的，如图3所示，上述实施例中的步骤S201具体可包括以下步骤：
S301，获取电池在当前时刻之前的设定时间内的等效电流。
具体的，设定时间可以设置为30分钟，获取电池在过去30分钟内的等效电流Ieq。
S302，根据等效电流和电池的额定容量，得到放电倍率。
具体的，计算等效电流Ieq和电池的额定容量Cp的比值，得到放电倍率DchaC，即DchaC＝Ieq/Cp。
进一步的，如图4所示，上述实施例中的步骤S301具体可包括以下步骤：
S401，获取电池在当前时刻之前的设定时间内每单位时间内的平均电流。
具体的，以设定时间为30分钟，单位时间为一分钟为例，获取电池在过去的30分钟内每分钟内的平均电流。可建立30维平均电流数组，初始值为1/3C，每运行1分钟后将平均电流更新到数组最后1个值，并丢弃第1个值，形成电池在过去的30分钟内每分钟内的平均电流组成的30维平均电流数组。
S402，根据设定时间内每单位时间内的平均电流，得到设定时间内的等效电流。
具体的，根据电池在过去的30分钟内每分钟内的平均电流得到设定时间内的等效电流。可根据以下递推公式计算过去30分钟内的等效电流Ieq：
其中，I[k]表示第k分钟内的平均电流，λ是一个常数，例如可以设置为0.05，即距离当前时刻越近，该分钟内的平均电流在计算等效电流时所占权重越大。
进一步的，如图5所示，上述实施例中的步骤S202具体可包括以下步骤：
S501，获取电池在当前时刻之前的设定时间内单位时间对应的平均温升。
具体的，温升即升高的温度。设定时间可以设置为30分钟，单位时间可以设置为1分 钟，获取电池在过去的30分钟内每分钟对应的平均温升。作为一种可行的实施方式，可以获取电池在当前时刻之前的设定时间内每单位时间内的平均温升，计算设定时间内每单位时间内的平均温升的和值，根据和值计算得到设定时间内单位时间对应的平均温升。可建立30维平均温升数组，根据电池温度和环境温度查表得到温升数值，计算每1分钟的平均温升，更新到数组最后1个值，并丢弃第1个值，形成电池在过去的30分钟内每分钟内的平均温升组成的30维平均温升数组。将平均温升数组求和后取平均值作为过去30分钟每分钟对应的平均温升DeltaTavg。
S502，根据设定时间内单位时间对应的平均温升和电池当前时刻的温度，得到预测温度。
具体的，如果电池为包括多个单体电池的电池包，则电池当前时刻的温度为电池包中温度最低的单体电池的温度。计算设定时间内单位时间对应的平均温升DeltaTavg和电池当前时刻的温度Tmin的和值，得到预测温度Tpred。
为了实现上述实施例，本发明还提出一种电池剩余能量的估算装置。图6为本发明实施例所提供的一种电池剩余能量的估算装置的结构示意图。如图6所示，该电池剩余能量的估算装置包括：第一获取模块61、第二获取模块62、第三获取模块63和计算模块64。
第一获取模块61，用于获取电池的理论剩余能量。
第二获取模块62，用于获取电池在当前时刻之前的设定时间内的放电能量比率。
第三获取模块63，用于获取电池的健康状态SOH。
计算模块64，用于根据理论剩余能量、放电能量比率和健康状态SOH，计算得到电池的实际剩余能量。
进一步的，第一获取模块61可具体用于：获取电池当前的剩余容量百分比SOC；根据剩余容量百分比SOC和和预先存储的剩余容量百分比SOC和理论剩余能量的对应关系，得到理论剩余能量。
进一步的，第二获取模块62可具体用于：获取电池在当前时刻之前的设定时间内的放电倍率；获取电池在当前时刻之后的单位时间后的预测温度；根据放电倍率和预测温度，得到放电能量比率。
进一步的，第二获取模块62可具体用于：获取电池在当前时刻之前的设定时间内的等效电流；根据等效电流和电池的额定容量，得到放电倍率。
进一步的，第二获取模块62可具体用于：获取电池在当前时刻之前的设定时间内每单位时间内的平均电流；根据设定时间内每单位时间内的平均电流，得到设定时间内的等效电流。
进一步的，第二获取模块62可具体用于：获取电池在当前时刻之前的设定时间内单位 时间对应的平均温升；根据设定时间内单位时间对应的平均温升和电池当前时刻的温度，得到预测温度。
进一步的，第二获取模块62可具体用于：获取电池在当前时刻之前的设定时间内每单位时间内的平均温升；计算设定时间内每单位时间内的平均温升的和值；根据和值计算得到设定时间内单位时间对应的平均温升。
需要说明的是，前述对电池剩余电量的估算方法实施例的解释说明也适用于该实施例的电池剩余电量的估算装置，此处不再赘述。
本实施例中，获取电池的理论剩余能量、电池在当前时刻之前的设定时间内的放电能量比率和电池的健康状态SOH，根据理论剩余能量、放电能量比率和健康状态SOH，计算得到电池的实际剩余能量，该电池的实际剩余能量可以更准确的反映当前电池的剩余能量状态。
为了实现上述实施例，本发明还提出了一种车辆。图7为本发明实施例所提供的一种车辆的结构示意图。如图7所示，该车辆71包括：如上述实施例所示的电池剩余能量的估算装置72。
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。在本说明书中，对上述术语的示意性表述不必针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。
Claims (11)
- 一种电池剩余能量的估算方法，其特征在于，包括：获取电池的理论剩余能量；获取所述电池在当前时刻之前的设定时间内的放电能量比率；获取所述电池的健康状态；根据所述理论剩余能量、所述放电能量比率和所述健康状态，计算得到所述电池的实际剩余能量。
- 根据权利要求1所述的估算方法，其特征在于，所述获取电池的理论剩余能量，包括：获取所述电池当前的剩余容量百分比；根据所述剩余容量百分比和预先存储的剩余容量百分比和理论剩余能量的对应关系，得到所述理论剩余能量。
- 根据权利要求1所述的估算方法，其特征在于，所述获取所述电池在当前时刻之前的设定时间内的放电能量比率，包括：获取所述电池在当前时刻之前的所述设定时间内的放电倍率；获取所述电池在当前时刻之后的单位时间后的预测温度；根据所述放电倍率和所述预测温度，得到所述放电能量比率。
- 根据权利要求3所述的估算方法，其特征在于，所述获取所述电池在当前时刻之前的所述设定时间内的放电倍率，包括：获取所述电池在当前时刻之前的所述设定时间内的等效电流；根据所述等效电流和所述电池的额定容量，得到所述放电倍率。
- 根据权利要求4所述的估算方法，其特征在于，所述获取所述电池在当前时刻之前的所述设定时间内的等效电流，包括：获取所述电池在当前时刻之前的所述设定时间内每单位时间内的平均电流；根据所述设定时间内每单位时间内的所述平均电流，得到所述设定时间内的等效电流。
- 根据权利要求3所述的估算方法，其特征在于，所述获取所述电池在当前时刻之后的单位时间后的预测温度，包括：获取所述电池在当前时刻之前的所述设定时间内单位时间对应的平均温升；根据所述设定时间内单位时间对应的平均温升和所述电池当前时刻的温度，得到所述预测温度。
- 根据权利要求6所述的估算方法，其特征在于，所述获取所述电池在当前时刻之前 的所述设定时间内单位时间对应的平均温升，包括：获取所述电池在当前时刻之前的所述设定时间内每单位时间内的平均温升；计算所述设定时间内每单位时间内的平均温升的和值；根据所述和值计算得到所述设定时间内单位时间对应的平均温升。
- 一种电池剩余能量的估算装置，其特征在于，包括：第一获取模块，用于获取电池的理论剩余能量；第二获取模块，用于获取所述电池在当前时刻之前的设定时间内的放电能量比率；第三获取模块，用于获取所述电池的健康状态；计算模块，用于根据所述理论剩余能量、所述放电能量比率和所述健康状态，计算得到所述电池的实际剩余能量。
- 根据权利要求8所述的估算装置，其特征在于，所述第一获取模块具体用于：获取所述电池当前的剩余容量百分比；根据所述剩余容量百分比和和预先存储的剩余容量百分比和理论剩余能量的对应关系，得到所述理论剩余能量。
- 根据权利要求8所述的估算装置，其特征在于，所述第二获取模块具体用于：获取所述电池在当前时刻之前的所述设定时间内的放电倍率；获取所述电池在当前时刻之后的单位时间后的预测温度；根据所述放电倍率和所述预测温度，得到所述放电能量比率。
- 一种车辆，其特征在于，包括：如权利要求8-10任一项所述的电池剩余能量的估算装置。
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