WO2018120771A1 - 一种电池目标soc的确定方法及装置 - Google Patents

一种电池目标soc的确定方法及装置 Download PDF

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WO2018120771A1
WO2018120771A1 PCT/CN2017/093168 CN2017093168W WO2018120771A1 WO 2018120771 A1 WO2018120771 A1 WO 2018120771A1 CN 2017093168 W CN2017093168 W CN 2017093168W WO 2018120771 A1 WO2018120771 A1 WO 2018120771A1
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battery
soc
current
target
voltage
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French (fr)
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颜昱
谭俐
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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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]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • 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
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements

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  • the method of determining the target SOC based on the correspondence between the SOC and the voltage calibrated under the static condition is that an accurate target SOC cannot be obtained.
  • a target SOC is determined according to the target correspondence.
  • any possible implementation manner further provide an implementation manner of determining a current state of the battery according to a quantity of power of the battery at each sampling point, including:
  • Determining that the type of power of the battery at each sampling point is a charging amount or a discharging amount
  • a current state of the battery is a state of charge when an accumulated sum of charge amounts of the battery is greater than a sum of discharges of the battery; or, when an accumulated sum of charge amounts of the battery is less than or equal to When the sum of the discharged electric quantities of the battery is summed, it is determined that the current state of the battery is the discharged state.
  • any possible implementation manner further provide an implementation manner of collecting power of the battery at each sampling point, including:
  • the aspect as described above, and any possible implementation manner, further provide an implementation manner, according to the current state, selecting a target correspondence relationship from at least two correspondences between the specified SOC and the voltage, including:
  • the first correspondence is selected from the at least two correspondences between the specified SOC and the voltage as a target correspondence, wherein the first correspondence is a specified current Corresponding relationship between SOC and voltage of the obtained battery during charging of the battery;
  • any possible implementation manner further provide an implementation manner of determining a target SOC according to the target correspondence relationship, including:
  • the current SOC of the battery is replaced with the target SOC.
  • the amount of power of the battery at each sampling point is collected, and then, according to the amount of power of the battery at each sampling point, the current state of the battery is determined; thus, according to the current state, Selecting a target correspondence from at least two correspondences between the specified SOC and the voltage; and further, determining a target SOC according to the target correspondence.
  • the correspondence between the SOC and the voltage to which the current state of the battery is applied is selected, thereby obtaining the target SOC of the battery, which is obtained in the present application.
  • the target SOC of the battery is directly related to the operating state of the battery.
  • the corresponding relationship between the voltage value of the currently collected battery and the selected one can be directly used to obtain an accurate target SOC; compared with the prior art, the target SOC is obtained.
  • the technical solution provided by the present application can be executed when the battery is in a charging state or the battery is in a discharging state, and the battery does not need to be placed or otherwise processed. Therefore, the purpose of acquiring the target SOC can be completed in a short time. . Therefore, the technical solution provided by the present application improves the accuracy of determining the target SOC, shortens the determination time, and solves the static condition based on the prior art.
  • the correspondence between the calibrated SOC and the voltage results in a problem that the accuracy of the target SOC is low.
  • the collecting unit is configured to collect the power of the battery at each sampling point when a current flows through the battery;
  • a selecting unit configured to select a target correspondence relationship from at least two correspondences between the specified SOC and the voltage according to a current state of the battery
  • the determining unit is further configured to determine a target SOC according to the target correspondence relationship.
  • the apparatus further includes a first acquiring unit
  • the determining unit is configured to determine that the type of power of the battery at each sampling point is a charging power or a discharging power;
  • the first obtaining unit is configured to accumulate electric quantities having the same type, and obtain a sum of electric quantities corresponding to each type;
  • the determining unit is further configured to determine that a current state of the battery is a charging state when an accumulated sum of charging powers of the battery is greater than an accumulated sum of discharged powers of the battery; or When the sum of the charged electric quantities is less than or equal to the sum of the discharged electric quantities of the battery, it is determined that the current state of the battery is the discharging state.
  • the acquiring unit is configured to:
  • the first correspondence is selected from the at least two correspondences between the specified SOC and the voltage as a target correspondence, wherein the first correspondence is a specified current Corresponding relationship between SOC and voltage of the obtained battery during charging of the battery;
  • the collecting unit is further configured to collect a current voltage of the battery
  • the determining unit is configured to determine, according to the target correspondence, that an SOC corresponding to a current voltage of the battery in the target correspondence relationship is the same as the current voltage of the battery is lower than a preset voltage threshold Target SOC.
  • the device :
  • a second acquiring unit configured to acquire a current SOC of the battery
  • the second obtaining unit is further configured to acquire a difference between a current SOC of the battery and the target SOC;
  • a correction unit configured to replace the current SOC of the battery with the target SOC when the difference is greater than a preset difference threshold.
  • the collecting unit in the determining device of the target SOC collects the amount of power of the battery at each sampling point; then, the determining unit in the device determines according to the amount of power of the battery at each sampling point. a current state of the battery; thus, the selection unit in the device selects a target correspondence relationship from at least two correspondences between the specified SOC and the voltage according to the current state; and further, the determining unit in the device is determined according to The target correspondence relationship determines the target SOC.
  • the correspondence between the SOC and the voltage to which the current state of the battery is applied is selected, thereby obtaining the target SOC of the battery, which is obtained in the present application.
  • the target SOC of the battery is directly related to the operating state of the battery.
  • the technical solution provided by the present application can be in the battery The charging state or the battery is in a discharged state, and therefore, it is not necessary to stand or otherwise process the battery, and therefore, the purpose of acquiring the target SOC can be completed in a short time. Therefore, the technical solution provided by the present application improves the accuracy of determining the target SOC, shortens the determination time, and solves the accuracy of the target SOC obtained by the correspondence between the SOC and the voltage calibrated under static conditions in the prior art. Lower question.
  • Embodiment 1 is a schematic flow chart of Embodiment 1 of a method for determining a battery target SOC provided by the present application;
  • Embodiment 3 is a schematic flow chart of Embodiment 2 of a method for determining a battery target SOC provided by the present application;
  • FIG. 4 is a functional block diagram of a device for determining a battery target SOC provided by the present application.
  • first, second, third, etc. may be used in this application to describe the corresponding relationship, these correspondences should not be limited to these terms. These terms are only used to distinguish correspondences from each other.
  • first correspondence may also be referred to as a second correspondence without departing from the scope of the present application.
  • second correspondence may also be referred to as a first correspondence.
  • the word “if” as used herein may be interpreted as “when” or “when” or “in response to determining” or “in response to detecting.”
  • the phrase “if determined” or “if detected (conditions or events stated)” may be interpreted as “when determined” or “in response to determination” or “when detected (stated condition or event) “Time” or “in response to a test (condition or event stated)”.
  • FIG. 1 is a schematic flowchart of Embodiment 1 of a method for determining a battery target SOC provided by the present application. As shown in Figure 1, the method includes the following steps:
  • S101 Collecting a battery power at each sampling point when a current flows through the battery.
  • the battery when a current flows through the battery, the battery may be in a charging state, or the battery may be in a discharging state. At this time, the power can be collected at each sampling point in the battery.
  • the power of the battery when the power of the battery is collected at each sampling point, it can be realized by integrating the current with the time; or, it can also be implemented by some devices for detecting the battery power in real time, which is not specifically limited in the present application.
  • sampling point can be preset according to actual needs, and the present application does not specifically limit this; and the number of sampling points is at least one. In actual application, the number of sampling points can be preset according to actual needs. And the location, this application does not specifically limit this.
  • the amount of power of the battery at each sampling point is collected to determine the current state of the battery according to the amount of power of the battery.
  • a target condition may be preset according to actual needs.
  • the battery is stopped to be collected at each sampling point, and then the collection is stopped according to the stop.
  • the current state of the battery is determined by the amount of power collected before the battery's power.
  • the current flowing through the battery at each sampling point can be integrated with time.
  • the current is stopped.
  • the integration of time gives the battery's charge at each sampling point.
  • the implementation manner of collecting the power of the battery at each sampling point may include, but is not limited to, the following methods:
  • the temperature threshold of the battery can be preset to be 13 ° C
  • the current threshold of the battery can be preset to be 2 A
  • the specified duration is 3 min. Therefore, in determining the target SOC of the battery, the battery is stopped at each sampling point only when the temperature of the battery is always greater than 13 ° C within 3 min, and the current flowing through the battery is always less than 2 A within 3 min. The amount of power, and determine the current state of the battery based on the collected power.
  • the collected power may include charging. Electricity and discharge capacity. It can be understood that the charging power is the amount of electricity flowing into the battery when the battery is charged; the discharging power is the amount of electricity that the battery flows out when the battery is discharged outward.
  • the implementation manner of determining the current state of the battery according to the amount of power of the battery at each sampling point may include, but is not limited to, the following manners:
  • the correspondence relationship between the SOC and the voltage of the battery when the battery is in the discharged state is established in advance as an example.
  • the correspondence between the SOC and the voltage in the state is preset, the voltage of the battery in the discharging state may be collected during the discharging of the battery by using the specified current, and the collecting battery is in the discharging state.
  • the correspondence between the SOC and the voltage when the battery is in the discharged state is established based on the collected voltage and SOC of the battery.
  • the current used may be selected according to actual needs.
  • the specified current can be set to a smaller current value.
  • the battery can be placed in a pseudo-static state with a small current flowing, thereby ensuring the accuracy of the correspondence between the SOC and the voltage of the obtained battery.
  • the specified current can be set to 0.005C.
  • the correspondence between the SOC and the voltage of the battery when the battery is in a discharged state can be collected; or, the battery can be performed with a current of 0.005 C.
  • the correspondence between the SOC and the voltage of the battery when the battery is in the charging state is collected.
  • the number of correspondences between the SOC and the voltage of the battery in each state in which the battery can be obtained is at least one.
  • a constant current discharge is applied to the battery by using a current of 0.005 C
  • the correspondence between the SOC and the voltage of the battery when the battery is in a discharged state can be established as a correspondence relationship A
  • the correspondence between the SOC and the voltage of the battery when the battery is in the discharge state can be established as the correspondence relationship B, and thus, the SOC and the voltage of the battery when the battery is in the discharged state can be obtained.
  • the number of correspondences is two.
  • the correspondence between the SOC and the voltage in the battery can be expressed as a relationship curve as shown in FIG. 2 , wherein FIG. 2 is a schematic diagram of the correspondence between the SOC and the voltage in the battery in the present application. It should be noted that FIG. 2 is only a specific expression of the correspondence between the SOC and the voltage in the battery, and is not used to limit the correspondence between the SOC and the voltage in the present application.
  • selecting a target correspondence relationship from at least two correspondences between the specified SOC and the voltage may include the following two implementation manners:
  • Manner 1 When the current state of the battery is the charging state, the first correspondence is selected from the at least two correspondences between the specified SOC and the voltage as the target correspondence.
  • the first correspondence relationship is a correspondence between the SOC and the voltage of the obtained battery in the process of charging the battery by using the specified current.
  • the second correspondence is selected from the at least two correspondences between the specified SOC and the voltage as the target correspondence.
  • the second correspondence relationship is a correspondence relationship between the SOC and the voltage of the obtained battery in the process of discharging the battery by using the specified current.
  • the number of correspondences in the at least two corresponding correspondences in the specified battery is in the discharged state, the number of correspondences is also at least two.
  • the currents with equal or similar current thresholds in S101 are the first correspondences when the battery is charged; and the currents equal to or similar to the preset current thresholds in S101 are selected to discharge the battery.
  • the obtained correspondence is the second correspondence.
  • the implementation manner of determining the target SOC may include, but is not limited to, the following two types:
  • the current voltage of the battery is collected.
  • the SOC corresponding to the current voltage of the battery in the target correspondence relationship is determined as the target SOC.
  • the voltage of the battery is collected, and then, it is detected whether the voltage of the battery satisfies the specified condition, and thus, when the voltage of the battery satisfies the specified condition, the target SOC is determined according to the target correspondence.
  • the preset specified condition whether the voltage of the battery meets the preset specified condition may be determined.
  • the current voltage of the target and the current state of the battery may be determined according to the target correspondence relationship.
  • the corresponding SOC is the target SOC.
  • the specified conditions can be preset according to actual needs.
  • the voltage of the battery when the voltage of the battery is always lower than the preset voltage threshold within a preset duration, the voltage of the battery is detected to meet the specified condition.
  • the voltage of the battery appears above a preset voltage threshold within a preset duration, it is detected that the voltage of the battery does not satisfy the specified condition.
  • the specified duration and the voltage threshold may be preset according to actual needs.
  • the time when the specified duration starts to be timely may also be preset according to actual needs.
  • the timing of the specified time period may be started at the time when the power consumption of the battery is stopped, and then, when the voltage of the battery appears higher than the preset voltage threshold within a specified time period, the timing is restarted, when the voltage of the battery is next time.
  • Timely specified duration When the internal voltage is always lower than the preset voltage threshold, it is detected that the voltage of the battery satisfies the specified condition; or, when the voltage of the battery appears higher than the preset voltage threshold within a specified time period, the execution judgment of the determining method is exited, Start again from S101.
  • the battery voltage threshold can be preset to 3.26V, and the specified duration is 3 minutes.
  • the current SOC of the battery can also be corrected according to the target SOC.
  • the implementation manner of correcting the current SOC of the battery according to the target SOC may include the following steps:
  • the current SOC of the battery is replaced with the target SOC.
  • the current SOC of the battery is replaced without the target SOC, and the current SOC of the reserved battery is unchanged.
  • the difference threshold may also be preset according to actual needs.
  • the difference threshold of the lithium iron phosphate battery may be preset to be 2%. It can be understood that the preset difference threshold is expressed as an error range that can be received by the current SOC of the battery.
  • the current SOC value error of the battery is considered to be compared. Large, only the current SOC value of the battery is corrected; otherwise, the current SOC value error of the battery is considered to be relatively small, and no correction can be made.
  • the amount of power of the battery at each sampling point is collected, and then the current state of the battery is determined according to the amount of power of the battery at each sampling point; thus, according to the current state, at least two correspondences between the specified SOC and the voltage are obtained.
  • the target correspondence relationship is selected; further, the target SOC is determined according to the target correspondence relationship.
  • the correspondence between the SOC and the voltage to which the current state of the battery is applied is selected, thereby obtaining the target SOC of the battery, which is obtained in the present application.
  • the target SOC of the battery is directly related to the operating state of the battery, and therefore, the corresponding relationship between the voltage value of the currently collected battery and the selection can be directly utilized.
  • the accurate target SOC is obtained.
  • the technical solution provided by the present application can be executed when the battery is in a charging state or the battery is in a discharged state, and the battery does not need to be rested or other. Processing, therefore, the purpose of acquiring the target SOC can be completed in a short time. Therefore, the technical solution provided by the present application improves the accuracy of determining the target SOC, shortens the determination time, and solves the accuracy of the target SOC obtained by the correspondence between the SOC and the voltage calibrated under static conditions in the prior art. Lower question.
  • the present application provides a specific implementation manner of the method for determining the battery target SOC.
  • FIG. 3 is a schematic flowchart of Embodiment 2 of a method for determining a target SOC of a battery provided by the present application. As shown in FIG. 3 , the method includes the following steps:
  • the method for determining the target SOC of the battery provided by the present application is only one specific implementation manner of the method for determining the target SOC of the battery provided in the first embodiment, and is not limited to the other.
  • the target SOC of the obtained battery is directly related to the operating state of the battery.
  • the technical solution provided by the present application can be performed when the battery is in a charging state or the battery is in a discharging state, and the battery does not need to be left to rest or other processing, and therefore, can be short.
  • the purpose of obtaining the target SOC is completed within the time. Therefore, the technical solution provided by the present application improves the accuracy of determining the target SOC, shortens the determination time, and solves the accuracy of the target SOC obtained by the correspondence between the SOC and the voltage calibrated under static conditions in the prior art. Lower question.
  • the present application further provides an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments.
  • FIG. 4 is a functional block diagram of a device for determining a battery target SOC provided by the present application. As shown in Figure 4, the device comprises:
  • the collecting unit 41 is configured to collect the battery at each sampling point when a current flows through the battery Electricity
  • a determining unit 42 configured to determine a current state of the battery according to the amount of power of the battery at each sampling point
  • the selecting unit 43 is configured to select a target correspondence relationship from at least two correspondences between the specified SOC and the voltage according to the current state of the battery;
  • the determining unit 42 is further configured to determine the target SOC according to the target correspondence.
  • the device further includes a first obtaining unit 44;
  • the determining unit 42 is configured to determine that the type of power of the battery at each sampling point is a charging power or a discharging power;
  • a first obtaining unit 44 configured to accumulate powers having the same type, and obtain a sum of electric quantities corresponding to each type
  • the determining unit 42 is further configured to determine that the current state of the battery is a charging state when the accumulated sum of the charged electric quantities of the battery is greater than the accumulated sum of the discharged electric quantities of the battery; or, when the accumulated sum of the charged electric quantities of the battery is less than or equal to When the battery discharge amount is summed, it is determined that the current state of the battery is the discharge state.
  • the collecting unit 41 is configured to:
  • the battery is stopped to collect the power at each sampling point, and the battery is charged at each sampling point. value.
  • the selecting unit 43 is configured to:
  • the first correspondence is selected from the at least two correspondences between the specified SOC and the voltage as a target correspondence, wherein the first correspondence is to charge the battery by using the specified current.
  • the correspondence between the SOC and the voltage of the obtained battery or
  • the second correspondence is selected from the at least two correspondences between the specified SOC and the voltage as a target correspondence, wherein the second correspondence is to discharge the battery by using the specified current.
  • the correspondence between the SOC and the voltage of the obtained battery is selected from the at least two correspondences between the specified SOC and the voltage as a target correspondence, wherein the second correspondence is to discharge the battery by using the specified current.
  • the collecting unit 41 is further configured to collect a current voltage of the battery
  • the determining unit 42 is configured to determine, according to the target correspondence relationship, that the SOC corresponding to the current voltage of the battery in the target correspondence relationship is the target SOC according to the target correspondence relationship when the current voltage of the battery is lower than the preset voltage threshold.
  • the device may further include:
  • a second obtaining unit 46 configured to acquire a current SOC of the battery
  • the second obtaining unit 46 is further configured to acquire a difference between a current SOC of the battery and a target SOC;
  • the correcting unit 47 is configured to replace the current SOC of the battery with the target SOC when the difference is greater than the preset difference threshold.
  • the acquisition unit in the determining device of the target SOC collects the amount of power of the battery at each sampling point; then, the determining unit in the device determines the battery according to the amount of power of the battery at each sampling point. a current state; thus, the selection unit in the device selects a target correspondence relationship from at least two correspondences between the specified SOC and the voltage according to the current state; and further, the determining unit in the device determines the target according to the target correspondence relationship SOC.
  • the target SOC of the obtained battery is directly related to the operating state of the battery.
  • the technical solution provided by the present application can be performed when the battery is in a charging state or the battery is in a discharging state, and the battery does not need to be left to rest or other processing, and therefore, can be short.
  • the purpose of obtaining the target SOC is completed within the time. Therefore, the technical solution provided by the present application improves the accuracy of determining the target SOC, shortens the determination time, and solves the pair between the SOC and the voltage calibrated based on static conditions in the prior art. It should be related to the problem that the accuracy of the target SOC is low.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present application. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

一种电池目标SOC的确定方法及装置。所述方法包括以下步骤：当有电流流经电池时，采集电池在各采样点的电量（S101）；然后，根据电池在各采样点的电量，确定电池的当前状态（S102）；从而，根据电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系（S103）；进而，根据目标对应关系，确定目标SOC（S104）。该方法能够解决现有技术中基于静态条件下标定的SOC与电压之间的对应关系得到的目标SOC的准确率较低的问题。

Description

一种电池目标SOC的确定方法及装置
本申请要求于2016年12月26日提交中国专利局、申请号为201611215342.0、发明名称为“一种电池目标SOC的确定方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，尤其涉及一种电池目标SOC的确定方法及装置。
背景技术
目前，准确的获取电池的荷电状态(State Of Charge，SOC)是电池领域需要着重解决的问题。现有技术中，一般是基于静态条件下标定的SOC与电压之间的对应关系，通过获取电池在静态条件下的电压值，获取电池的SOC数据的；其中，静态条件具体是指在没有电流通过电池的条件下。
现有技术中，由于SOC与电压的对应关系是在静态条件下保持足够长的时间获得的，因此，要求采集的电压值也需要在静态条件下保持足够长的时间，才能保证此时得到的电压是稳定的，从而，基于该电压值才能得到准确的目标SOC数据。但是，而这个足够长的时间一般以小时为单位，在实际使用过程中一般会超过3h。
在实现本申请过程中，申请人发现现有技术中至少存在如下问题：
在实际应用中，一般不存在没有电流经过电池并维持多个小时的情况。因此，现有技术中基于静态条件下标定的SOC与电压之间的对应关系确定目标SOC的方法，是无法得到准确的目标SOC的。
申请内容
有鉴于此，本申请提供了一种电池目标SOC的确定方法及装置，用以解决现有技术中基于静态条件下标定的SOC与电压之间的对应关系得到的目标SOC的准确率较低的问题。
一方面，本申请提供了一种电池目标SOC的确定方法，包括：
当有电流流经电池时，采集所述电池在各采样点的电量；
根据所述电池在各采样点的电量，确定所述电池的当前状态；
根据所述电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；
根据所述目标对应关系，确定目标SOC。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，根据所述电池在各采样点的电量，确定所述电池的当前状态，包括：
确定所述电池在各采样点处电量的类型为充电电量或放电电量；
将具有相同类型的电量进行累加，获得各类型对应的电量累加和；
当所述电池的充电电量的累加和大于所述电池的放电电量的累加和时，确定所述电池的当前状态为充电状态；或者，当所述电池的充电电量的累加和小于或者等于所述电池的放电电量的累加和时，确定所述电池的当前状态为放电状态。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，采集电池在各采样点的电量，包括：
采集所述电池在各采样点的电量；
采集所述电池的电流和所述电池的温度；
在指定时长内，当所述电池的电流低于预设的电流阈值，且所述电池的温度大于预设的温度阈值时，停止采集所述电池在各采样点的电量，得到所述电池在各采样点处的多个电量值。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，根据所述当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系，包括：
当所述电池的当前状态为充电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第一对应关系为目标对应关系，其中，所述第一对应关系为在采用指定电流对所述电池进行充电的过程中，得到的所述电池的SOC与电压之间的对应关系；或者，
当所述电池的当前状态为放电状态时，从指定的SOC与电压之 间的至少两个对应关系中选择第二对应关系为目标对应关系，其中，所述第二对应关系为在采用指定电流对所述电池进行放电的过程中，得到的所述电池的SOC与电压之间的对应关系。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，根据所述目标对应关系，确定目标SOC，包括：
采集所述电池的当前电压；
当所述电池的当前电压低于预设的电压阈值时，根据所述目标对应关系，确定所述目标对应关系中与所述电池的当前电压对应的SOC为所述目标SOC。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述方法还包括：
获取所述电池的当前SOC；
获取所述电池的当前SOC与所述目标SOC之间的差值；
当所述差值大于预设的差值阈值时，用所述目标SOC替换所述电池的当前SOC。
上述技术方案中的一个技术方案具有如下有益效果：
本申请中，当有电流流经电池时，采集电池在各采样点的电量，然后，根据所述电池在各采样点的电量，确定所述电池的当前状态；从而，根据所述当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；进而，根据所述目标对应关系，确定目标SOC。本申请中，通过确定电池的当前状态，然后，基于确定的当前状态，选择电池的当前状态适用的SOC与电压之间的对应关系，从而，获取电池的目标SOC，本申请中，获取到的电池的目标SOC是与电池的运行状态直接相关的，因此，可以直接利用当前采集到的电池的电压值与选择的对应关系，得到准确的目标SOC；相较于现有技术中获取目标SOC的方法，本申请提供的技术方案可以在电池处于充电状态或电池处于放电状态的情况下执行，不需要对电池进行静置或其他处理，因此，可以在较短的时间内完成获取目标SOC的目的。因此，本申请提供的技术方案提高了确定目标SOC的准确率，缩短了确定时间，并且解决了现有技术中基于静态条件 下标定的SOC与电压之间的对应关系得到的目标SOC的准确率较低的问题。
另一方面，本申请提供了一种电池目标SOC的确定装置，包括：
采集单元，用于当有电流流经电池时，采集所述电池在各采样点的电量；
确定单元，用于根据所述电池在各采样点的电量，确定所述电池的当前状态；
选择单元，用于根据所述电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；
所述确定单元，还用于根据所述目标对应关系，确定目标SOC。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述装置还包括第一获取单元；
所述确定单元，用于确定所述电池在各采样点处电量的类型为充电电量或放电电量；
所述第一获取单元，用于将具有相同类型的电量进行累加，获得各类型对应的电量累加和；
所述确定单元，还用于当所述电池的充电电量的累加和大于所述电池的放电电量的累加和时，确定所述电池的当前状态为充电状态；或者，还用于当所述电池的充电电量的累加和小于或者等于所述电池的放电电量的累加和时，确定所述电池的当前状态为放电状态。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述采集单元，用于：
采集所述电池在各采样点的电量；
采集所述电池的电流和所述电池的温度；
在指定时长内，当所述电池的电流低于预设的电流阈值，且所述电池的温度大于预设的温度阈值时，停止采集所述电池在各采样点的电量，得到所述电池在各采样点处的多个电量值。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述选择单元，用于：
当所述电池的当前状态为充电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第一对应关系为目标对应关系，其中，所述第一对应关系为在采用指定电流对所述电池进行充电的过程中，得到的所述电池的SOC与电压之间的对应关系；或者，
当所述电池的当前状态为放电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第二对应关系为目标对应关系，其中，所述第二对应关系为在采用指定电流对所述电池进行放电的过程中，得到的所述电池的SOC与电压之间的对应关系。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述采集单元，还用于采集所述电池的当前电压；
所述确定单元，用于当所述电池的当前电压低于预设的电压阈值时，根据所述目标对应关系，确定所述目标对应关系中与所述电池的当前电压对应的SOC为所述目标SOC。
如上所述的方面和任一可能的实现方式，进一步提供一种实现方式，所述装置：
第二获取单元，用于获取所述电池的当前SOC；
所述第二获取单元，还用于获取所述电池的当前SOC与所述目标SOC之间的差值；
修正单元，用于当所述差值大于预设的差值阈值时，用所述目标SOC替换所述电池的当前SOC。
上述技术方案中的一个技术方案具有如下有益效果：
本申请中，当有电流流经电池时，目标SOC的确定装置中的采集单元采集电池在各采样点的电量；然后，该装置中的确定单元根据所述电池在各采样点的电量，确定所述电池的当前状态；从而，该装置中的选择单元根据所述当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；进而，该装置中的确定单元根据所述目标对应关系，确定目标SOC。本申请中，通过确定电池的当前状态，然后，基于确定的当前状态，选择电池的当前状态适用的SOC与电压之间的对应关系，从而，获取电池的目标SOC，本申请中，获取到的电池的目标SOC是与电池的运行状态直接相关 的，因此，可以直接利用当前采集到的电池的电压值与选择的对应关系，得到准确的目标SOC；相较于现有技术中获取目标SOC的方法，本申请提供的技术方案可以在电池处于充电状态或电池处于放电状态的情况下执行，因此，不需要对电池进行静置或其他处理，因此，可以在较短的时间内完成获取目标SOC的目的。因此，本申请提供的技术方案提高了确定目标SOC的准确率，缩短了确定时间，并且解决了现有技术中基于静态条件下标定的SOC与电压之间的对应关系得到的目标SOC的准确率较低的问题。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1是本申请所提供的电池目标SOC的确定方法的实施例一的流程示意图；
图2是本申请中电池中SOC与电压的对应关系示意图；
图3是本申请所提供的电池目标SOC的确定方法的实施例二的流程示意图；
图4是本申请所提供的电池目标SOC的确定装置的功能方块图。
具体实施方式
为了更好的理解本申请的技术方案，下面结合附图对本申请进行详细描述。
应当明确，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
在本申请中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。在本申请和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。
应当理解，本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应当理解，尽管在本申请中可能采用术语第一、第二、第三等来描述对应关系，但这些对应关系不应限于这些术语。这些术语仅用来将对应关系彼此区分开。例如，在不脱离本申请范围的情况下，第一对应关系也可以被称为第二对应关系，类似地，第二对应关系也可以被称为第一对应关系。
取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”或“响应于检测”。类似地，取决于语境，短语“如果确定”或“如果检测(陈述的条件或事件)”可以被解释成为“当确定时”或“响应于确定”或“当检测(陈述的条件或事件)时”或“响应于检测(陈述的条件或事件)”。
实施例一
为了解决现有技术中存在的上述问题，本申请给出一种目标SOC的确定方法，请参考图1，其为本申请所提供的电池目标SOC的确定方法的实施例一的流程示意图，如图1所示，该方法包括以下步骤：
S101，当有电流流经电池时，采集电池在各采样点的电量。
具体的，当有电流流经电池时，电池可以处于充电状态，或者，电池可以处于放电状态，此时，在电池中的各采样点可以采集到电量。
本申请中，采集电池在各采样点的电量时，可以通过电流对时间积分的方式实现；或者，还可以通过一些用于实时检测电池电量的装置实现，本申请对此不进行特别限定。
需要说明的是，采样点可以根据实际需要进行预设，本申请对此不进行特别限定；并且，采样点的数目为至少一个，在实际应用过程中，可以根据实际需要预设采样点的数目和位置，本申请对此不进行特别限定。
具体的，本申请中，采集电池在各采样点的电量，是为了根据电池的电量，确定电池的当前状态。
因此，本申请中，采集电池在各采样点的电量时，可以根据实际需要预设一个目标条件，当电池满足预设的目标条件时，停止采集电池在各采样点的电量，然后根据停止采集电池的电量之前采集到的各个电量，确定电池的当前状态。
例如，当采用电流对时间进行积分的方式采集电池在各采样点的电量时，可以用各采样点的流经电池的电流对时间进行积分，当电池满足预设的目标条件时，停止电流对时间的积分，得到电池在各采样点的电量。
具体的，这个目标条件可以根据实际需要进行预设，例如，可以根据当前流经电池的电流的大小，预设目标条件，例如，该目标条件可以为：当流经电池的电流低于预设的电流阈值时，停止对电池电量的采集；或者，还可以根据电池的温度，预设目标条件，例如，该目标条件可以为：当电池的温度达到预设的温度阈值时，停止对电池电量的采集。可以理解的是，以上举例仅用以说明如何预设停止采集电池的电量的目标条件，并不用以限制本申请，本申请对于预设目标条件的具体内容不进行特别限定。
在一个具体的实现过程中，采集电池在各采样点的电量的实现方式，可以包括但不限于以下方式：
采集电池在各采样点的电量；并采集电池的电流和电池的温度；然后，在指定时长内，当电池的电流低于预设的电流阈值，且电池的温度大于预设的温度阈值时，停止采集电池在各采样点的电量，得到电池在各采样点处的多个电量值。
例如，针对磷酸铁锂电池，可以预设该电池的温度阈值为13℃，还可以预设电池的电流阈值为2A，指定时长为3min。因此，在确定该电池的目标SOC的过程中，只有当该电池的温度在3min内始终大于13℃，且流经电池的电流在3min内始终小于2A时，才停止采集电池在各采样点处的电量，并根据采集到的电量确定电池的当前状态。
S102，根据电池在各采样点的电量，确定电池的当前状态。
具体的，在采集到电池在各采样点的电量后，考虑到电池在采集电量的过程中，由于电池可能会发生对外放电和/或对内充电的行为，因此，采集到的电量可以包括充电电量和放电电量。可以理解的是，充电电量为电池发生充电行为时，流入电池内的电量；放电电量为电池向外放电时，电池流出的电量。
因此，根据电池在各采样点的电量，确定电池的当前状态的实现方式可以包括但不限于以下方式：
确定电池在各采样点处电量的类型为充电电量或放电电量；
将具有相同类型的电量进行累加，获得各类型对应的电量累加和；
根据电量累加和，确定电池的当前状态。
具体的，根据电量累加和，确定电池的当前状态时，可以包括以下两种情况：
情况一、当电池的充电电量的累加和大于电池的放电电量的累加和时，确定电池的当前状态为充电状态。
情况二、当电池的充电电量的累加和小于或者等于电池的放电电量的累加和时，确定电池的当前状态为放电状态。
S103，根据当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系。
具体的，本申请中，指定的至少两个对应关系可以提前建立。具体的，以提前建立电池处于放电状态时的电池的SOC与电压之间的对应关系为例进行具体说明。具体的，预设该状态下的SOC与电压之间的对应关系时，可以在采用指定电流对电池进行放电的过程中，采集电池在该放电状态时的电压，以及，采集电池在该放电状态时的SOC，然后根据采集到的电池的电压和SOC，建立电池处于放电状态时的SOC与电压之间的对应关系。
需要说明的是，预设电池处于每个状态下的SOC与电压之间的对应关系的过程中，所采用的电流可以根据实际需要进行选择。在一个具体的实现过程中，可以设置指定电流为一个较小的电流值， 使得电池可以处于一种有较小电流流经的伪静态状态，从而保证得到的电池的SOC与电压之间的对应关系的准确性。
例如，在一个具体的实现过程中，指定电流可以设置为0.005C。此时，可以在采用0.005C的电流对电池进行恒流放电的过程中，采集电池处于放电状态时的电池的SOC与电压之间的对应关系；或者，可以在采用0.005C的电流对电池进行恒流充电的过程中，采集电池处于充电状态时的电池的SOC与电压之间的对应关系。
并且，根据对电池进行充电或者放电的过程中采用的电流的数值的不同，可以得到的电池处于每种状态时的电池的SOC与电压之间的对应关系的数目为至少一个。例如，当采用0.005C的电流对电池进行恒流放电，该过程中可以建立电池处于放电状态时的电池的SOC与电压之间的对应关系为对应关系A；当采用0.008C的电流对电池进行恒流放电，该过程中可以建立电池处于放电状态时的电池的SOC与电压之间的对应关系为对应关系B，如此，就可以得到的电池处于放电状态时的电池的SOC与电压之间的对应关系的数目为2个。
具体的，电池中SOC与电压之间的对应关系可以表示为如图2所示的关系曲线，其中，图2为本申请中电池中SOC与电压的对应关系示意图。需要说明的是，图2仅为电池中SOC与电压之间的对应关系的一种具体表达形式，并不用以限制本申请中SOC与电压之间的对应关系。
具体的，本申请中，根据确定的电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系，可以包括以下两种实现方式：
方式一、当电池的当前状态为充电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第一对应关系为目标对应关系。
其中，第一对应关系为在采用指定电流对电池进行充电的过程中，得到的电池的SOC与电压之间的对应关系。
方式二、当电池的当前状态为放电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第二对应关系为目标对应关系。
其中，第二对应关系为在采用指定电流对电池进行放电的过程中，得到的电池的SOC与电压之间的对应关系。
需要说明的是，以上述两种实现方式进行对应关系的选择时，若指定的至少两个对应关系中存在电池处于放电状态时的对应关系的数目也为至少两个时，此时，选择与S101中预设的电流阈值相等或相似的电流，对电池进行充电时得到的对应关系为第一对应关系；以及，选择与S101中预设的电流阈值相等或相似的电流，对电池进行放电时得到的对应关系为第二对应关系。
S104，根据目标对应关系，确定目标SOC。
本申请中，根据目标对应关系，确定目标SOC的实现方式可以包括但不限于以下两种：
方式A，采集电池的当前电压，当采集到的电池的当前电压低于预设的电压阈值时，确定目标对应关系中与电池的当前电压对应的SOC为目标SOC。
方式B，采集电池的电压，然后，检测电池的电压是否满足指定条件，从而，当电池的电压满足指定条件时，根据目标对应关系，确定目标SOC。
此时，可以根据预设的指定条件确定电池的电压是否满足预设的指定条件，当检测到电池的电压满足指定条件时，才会根据目标对应关系，确定目标对应关系中与电池的当前电压对应的SOC为目标SOC。在实际应用过程中，指定条件可以根据实际需要进行预设。
在一个具体的实现过程中，当电池的电压在预设的时长范围内始终低于预设的电压阈值时，检测到电池的电压满足指定条件。或者，当电池的电压在预设的时长范围内出现高于预设的电压阈值的情况时，检测到电池的电压不满足指定条件。
具体的，指定时长和电压阈值可以根据实际需要进行预设，同时，对指定时长开始进行及时的时刻也可以根据实际需要进行预设。
例如，可以在停止采集电池的电量的时刻开始进行该指定时长的计时，然后，电池的电压在指定时长内出现高于预设的电压阈值的情况时，重新开始计时，当电池的电压在下一次及时的指定时长 内始终低于预设的电压阈值时，检测到电池的电压满足指定条件；或者，当电池的电压在指定时长内出现高于预设的电压阈值的情况时，退出该确定方法的执行判断，重新自S101开始进行。
在一个具体的实现过程中，可以预设电池的电压阈值为3.26V，指定时长为3min。
在一个具体的实现过程中，还可以根据目标SOC，对电池的当前SOC进行修正。
具体的，根据目标SOC，对电池的当前SOC进行修正的实现方式可以包括以下步骤：
获取电池的当前SOC；
获取电池的当前SOC与目标SOC之间的差值；
当该差值大于预设的差值阈值时，用目标SOC替换电池的当前SOC。
或者，当该差值小于或者等于预设的差值阈值时，不用目标SOC替换电池的当前SOC，保留电池的当前SOC不变。
在实际应用过程中，该差值阈值也可以根据实际需要进行预设，例如，可以预设磷酸铁锂电池的差值阈值为2％。可以理解的是，预设的差值阈值表现为对电池的当前SOC可以接收的误差范围，当电池的当前SOC与目标SOC之间的差值超过这个阈值时，认为电池的当前SOC值误差比较大，才对电池的当前SOC值进行修正；否则，认为电池的当前SOC值误差比较小，可以不进行修正。
本申请的技术方案具有以下有益效果：
本申请中，采集电池在各采样点的电量，然后，根据电池在各采样点的电量，确定电池的当前状态；从而，根据当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；进而，根据目标对应关系，确定目标SOC。本申请中，通过确定电池的当前状态，然后，基于确定的当前状态，选择电池的当前状态适用的SOC与电压之间的对应关系，从而，获取电池的目标SOC，本申请中，获取到的电池的目标SOC是与电池的运行状态直接相关的，因此，可以直接利用当前采集到的电池的电压值与选择的对应关系， 得到准确的目标SOC；相较于现有技术中获取目标SOC的方法，本申请提供的技术方案可以在电池处于充电状态或电池处于放电状态的情况下执行，不需要对电池进行静置或其他处理，因此，可以在较短的时间内完成获取目标SOC的目的。因此，本申请提供的技术方案提高了确定目标SOC的准确率，缩短了确定时间，并且解决了现有技术中基于静态条件下标定的SOC与电压之间的对应关系得到的目标SOC的准确率较低的问题。
实施例二
基于上述实施例一所提供的电池目标SOC的确定方法，本申请给出一种上述电池目标SOC的确定方法的具体实现方式。
具体的，请参考图3，其为本申请所提供的电池目标SOC的确定方法的实施例二的流程示意图，如图3所示，该方法包括以下步骤：
S301，当有电流流经电池时，实时地采集电池在50个采样点处的电量。
S302，判断在指定时长内，电池的电流是否小于电流阈值，且电池的温度是否大于温度阈值；若是，执行S303；若否，执行S301。
S303，确定电池在50个采样点处的电量的类型。
S304，将具有相同类型的电量进行累加，获得充电电量的累加和与放电电量的累加和。
S305，判断放电电量的累加和是否大于或者等于充电电量的累加和；若是，执行S306；若否，执行S315。
S306，确定第二对应关系为电池的目标对应关系。
S307，采集电池的电压，并开始计时。
S308，判断电池的电压是否在预设时长范围内始终低于电压阈值；若是，执行S309；若否，执行S301。
S309，根据电池的当前电压与第二对应关系，确定目标SOC。
S310，获取电池的当前SOC。
S311，获取电池的当前SOC与目标SOC之间的差值。
S312，判断该差值是否大于差值阈值；若是，执行S313；若否， 执行S314。
S313，用目标SOC替换电池的当前SOC。
S314，保留电池的当前SOC不变。
S315，确定第一对应关系为电池的目标对应关系。
S316，采集电池的电压，并开始计时。
S317，判断电池的电压是否在预设时长范围内始终低于电压阈值；若是，执行S318；若否，执行S301。
S318，根据电池的当前电压与第一对应关系，确定目标SOC。
可以理解的是，本申请提供的电池目标SOC的确定方法仅为实施例一提供的电池目标SOC的确定方法的一种具体的实现方式，并不用以进行其他限定。
本申请的技术方案具有以下有益效果：
本申请中，当有电流流经电池时，通过确定电池的当前状态，然后，基于确定的当前状态，选择电池的当前状态适用的SOC与电压之间的对应关系，从而，获取电池的目标SOC，本申请中，获取到的电池的目标SOC是与电池的运行状态直接相关的，因此，可以直接利用当前采集到的电池的电压值与选择的对应关系，得到准确的目标SOC；相较于现有技术中获取目标SOC的方法，本申请提供的技术方案可以在电池处于充电状态或电池处于放电状态的情况下执行，不需要对电池进行静置或其他处理，因此，可以在较短的时间内完成获取目标SOC的目的。因此，本申请提供的技术方案提高了确定目标SOC的准确率，缩短了确定时间，并且解决了现有技术中基于静态条件下标定的SOC与电压之间的对应关系得到的目标SOC的准确率较低的问题。
实施例三
基于上述实施例一所提供的电池目标SOC的确定方法，本申请进一步给出实现上述方法实施例中各步骤及方法的装置实施例。
请参考图4，其为本申请所提供的电池目标SOC的确定装置的功能方块图。如图4所示，该装置包括：
采集单元41，用于当有电流流经电池时，采集电池在各采样点 的电量；
确定单元42，用于根据电池在各采样点的电量，确定电池的当前状态；
选择单元43，用于根据电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；
确定单元42，还用于根据目标对应关系，确定目标SOC。
在一个具体的实现过程中，该装置还包括第一获取单元44；
确定单元42，用于确定电池在各采样点处电量的类型为充电电量或放电电量；
第一获取单元44，用于将具有相同类型的电量进行累加，获得各类型对应的电量累加和；
确定单元42，还用于当电池的充电电量的累加和大于电池的放电电量的累加和时，确定电池的当前状态为充电状态；或者，还用于当电池的充电电量的累加和小于或者等于电池的放电电量的累加和时，确定电池的当前状态为放电状态。
具体的，采集单元41，用于：
采集电池在各采样点的电量；
采集电池的电流和电池的温度；
在指定时长内，当电池的电流低于预设的电流阈值，且电池的温度大于预设的温度阈值时，停止采集电池在各采样点的电量，得到电池在各采样点处的多个电量值。
具体的，本申请中，选择单元43，用于：
当电池的当前状态为充电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第一对应关系为目标对应关系，其中，第一对应关系为在采用指定电流对电池进行充电的过程中，得到的电池的SOC与电压之间的对应关系；或者，
当电池的当前状态为放电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第二对应关系为目标对应关系，其中，第二对应关系为在采用指定电流对电池进行放电的过程中，得到的电池的SOC与电压之间的对应关系。
在一个具体的实现过程中，采集单元41，还用于采集电池的当前电压；
确定单元42，用于当电池的当前电压低于预设的电压阈值时，根据目标对应关系，确定目标对应关系中与电池的当前电压对应的SOC为目标SOC。
具体的，该装置还可以包括：
第二获取单元46，用于获取电池的当前SOC；
第二获取单元46，还用于获取电池的当前SOC与目标SOC之间的差值；
修正单元47，用于当差值大于预设的差值阈值时，用目标SOC替换电池的当前SOC。
由于本实施例中的各单元能够执行图2所示的方法，本实施例未详细描述的部分，可参考对图2的相关说明。
本申请的技术方案具有以下有益效果：
本申请中，当有电流流经电池时，目标SOC的确定装置中的采集单元采集电池在各采样点的电量；然后，该装置中的确定单元根据电池在各采样点的电量，确定电池的当前状态；从而，该装置中的选择单元根据当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；进而，该装置中的确定单元根据目标对应关系，确定目标SOC。本申请中，当有电流流经电池时，通过确定电池的当前状态，然后，基于确定的当前状态，选择电池的当前状态适用的SOC与电压之间的对应关系，从而，获取电池的目标SOC，本申请中，获取到的电池的目标SOC是与电池的运行状态直接相关的，因此，可以直接利用当前采集到的电池的电压值与选择的对应关系，得到准确的目标SOC；相较于现有技术中获取目标SOC的方法，本申请提供的技术方案可以在电池处于充电状态或电池处于放电状态的情况下执行，不需要对电池进行静置或其他处理，因此，可以在较短的时间内完成获取目标SOC的目的。因此，本申请提供的技术方案提高了确定目标SOC的准确率，缩短了确定时间，并且解决了现有技术中基于静态条件下标定的SOC与电压之间的对 应关系得到的目标SOC的准确率较低的问题。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如，多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机装置(可以是个人计算机，服务器，或者网络装置等)或处理器(Processor)执行本申请各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内，所做的任何修改、等同替换、改进 等，均应包含在本申请保护的范围之内。

Claims (12)

  1. 一种电池目标荷电状态SOC的确定方法，其特征在于，所述方法包括：
    当有电流流经电池时，采集所述电池在各采样点的电量；
    根据所述电池在各采样点的电量，确定所述电池的当前状态；
    根据所述电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；
    根据所述目标对应关系，确定目标SOC。
  2. 根据权利要求1所述的方法，其特征在于，根据所述电池在各采样点的电量，确定所述电池的当前状态，包括：
    确定所述电池在各采样点处电量的类型为充电电量或放电电量；
    将具有相同类型的电量进行累加，获得各类型对应的电量累加和；
    当所述电池的充电电量的累加和大于所述电池的放电电量的累加和时，确定所述电池的当前状态为充电状态；或者，当所述电池的充电电量的累加和小于或者等于所述电池的放电电量的累加和时，确定所述电池的当前状态为放电状态。
  3. 根据权利要求1所述的方法，其特征在于，采集电池在各采样点的电量，包括：
    采集所述电池在各采样点的电量；
    采集所述电池的电流和所述电池的温度；
    在指定时长内，当所述电池的电流低于预设的电流阈值，且所述电池的温度大于预设的温度阈值时，停止采集所述电池在各采样点的电量，得到所述电池在各采样点处的多个电量值。
  4. 根据权利要求1或2所述的方法，其特征在于，根据所述当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系，包括：
    当所述电池的当前状态为充电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第一对应关系为目标对应关系，其中，所述第一对应关系为在采用指定电流对所述电池进行充电的过程中， 得到的所述电池的SOC与电压之间的对应关系；或者，
    当所述电池的当前状态为放电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第二对应关系为目标对应关系，其中，所述第二对应关系为在采用指定电流对所述电池进行放电的过程中，得到的所述电池的SOC与电压之间的对应关系。
  5. 根据权利要求2所述的方法，其特征在于，根据所述目标对应关系，确定目标SOC，包括：
    采集所述电池的当前电压；
    当所述电池的当前电压低于预设的电压阈值时，根据所述目标对应关系，确定所述目标对应关系中与所述电池的当前电压对应的SOC为所述目标SOC。
  6. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    获取所述电池的当前SOC；
    获取所述电池的当前SOC与所述目标SOC之间的差值；
    当所述差值大于预设的差值阈值时，用所述目标SOC替换所述电池的当前SOC。
  7. 一种电池目标SOC的确定装置，其特征在于，所述装置包括：
    采集单元，用于当有电流流经电池时，采集所述电池在各采样点的电量；
    确定单元，用于根据所述电池在各采样点的电量，确定所述电池的当前状态；
    选择单元，用于根据所述电池的当前状态，从指定的SOC与电压之间的至少两个对应关系中选择目标对应关系；
    所述确定单元，还用于根据所述目标对应关系，确定目标SOC。
  8. 根据权利要求7所述的装置，其特征在于，所述装置还包括第一获取单元；
    所述确定单元，用于确定所述电池在各采样点处电量的类型为充电电量或放电电量；
    所述第一获取单元，用于将具有相同类型的电量进行累加，获 得各类型对应的电量累加和；
    所述确定单元，还用于当所述电池的充电电量的累加和大于所述电池的放电电量的累加和时，确定所述电池的当前状态为充电状态；或者，还用于当所述电池的充电电量的累加和小于或者等于所述电池的放电电量的累加和时，确定所述电池的当前状态为放电状态。
  9. 根据权利要求7所述的装置，其特征在于，所述采集单元，用于：
    采集所述电池在各采样点的电量；
    采集所述电池的电流和所述电池的温度；
    在指定时长内，当所述电池的电流低于预设的电流阈值，且所述电池的温度大于预设的温度阈值时，停止采集所述电池在各采样点的电量，得到所述电池在各采样点处的多个电量值。
  10. 根据权利要求7或8所述的装置，其特征在于，所述选择单元，用于：
    当所述电池的当前状态为充电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第一对应关系为目标对应关系，其中，所述第一对应关系为在采用指定电流对所述电池进行充电的过程中，得到的所述电池的SOC与电压之间的对应关系；或者，
    当所述电池的当前状态为放电状态时，从指定的SOC与电压之间的至少两个对应关系中选择第二对应关系为目标对应关系，其中，所述第二对应关系为在采用指定电流对所述电池进行放电的过程中，得到的所述电池的SOC与电压之间的对应关系。
  11. 根据权利要求7所述的装置，其特征在于，所述采集单元，还用于采集所述电池的当前电压；
    所述确定单元，用于当所述电池的当前电压低于预设的电压阈值时，根据所述目标对应关系，确定所述目标对应关系中与所述电池的当前电压对应的SOC为所述目标SOC。
  12. 根据权利要求7所述的装置，其特征在于，所述装置还包括：
    第二获取单元，用于获取所述电池的当前SOC；
    所述第二获取单元，还用于获取所述电池的当前SOC与所述目标SOC之间的差值；
    修正单元，用于当所述差值大于预设的差值阈值时，用所述目标SOC替换所述电池的当前SOC。
PCT/CN2017/093168 2016-12-26 2017-07-17 一种电池目标soc的确定方法及装置 Ceased WO2018120771A1 (zh)

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