WO2017167002A1 - Method and apparatus for charging lifepo4 battery - Google Patents

Method and apparatus for charging lifepo4 battery Download PDF

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Publication number
WO2017167002A1
WO2017167002A1 PCT/CN2017/076489 CN2017076489W WO2017167002A1 WO 2017167002 A1 WO2017167002 A1 WO 2017167002A1 CN 2017076489 W CN2017076489 W CN 2017076489W WO 2017167002 A1 WO2017167002 A1 WO 2017167002A1
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temperature value
value
temperature
charging current
maximum
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PCT/CN2017/076489
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French (fr)
Chinese (zh)
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叶彦宏
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/0026—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00038—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
    • H02J7/00041—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • a charging method of a lithium iron phosphate battery including:
  • the charging current value increases as the reference temperature value increases, and is less than a preset maximum charging current value
  • the step of determining a reference temperature value according to the collected temperature value includes:
  • the maximum temperature value is taken as the reference temperature value
  • the charging current value I is the maximum charging current value.
  • the charging current value decreases as the reference temperature value increases, and is smaller than the maximum charging current value
  • the determining module includes:
  • a second determining unit configured to use the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature interval
  • the minimum temperature value or the maximum temperature value is used as the reference temperature value to calculate the charging current of the lithium iron phosphate battery.
  • the average value of the collected temperature values may also be calculated, and the calculated average temperature value is used as the reference temperature value.
  • T ref represents the reference temperature value
  • T ref ⁇ (T 0 , T 1 ], (T 0 , T 1 ] represents the low temperature interval
  • T 0 and T 1 are the lower and upper limits of the low temperature interval, respectively
  • T 1 is a positive number greater than
  • T 0 is determined according to the temperature value used daily, may be a value greater than 0, or may be a value less than or equal to 0, and I max represents a preset maximum charging current value.
  • the third calculating unit 4033 is configured to set the maximum charging current value as the charging current value I when the reference temperature value is in the normal temperature range.
  • the preset maximum charging current value is preferably used as the charging current value I.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:

Abstract

Disclosed are a method and an apparatus for charging a LiFePO4 battery. The charging method comprises: acquiring a temperature value of each cell in a LiFePO4 battery (S101); determining a reference temperature value according to the acquired temperature values (S102); and calculating a charging current value according to the reference temperature value, and charging the LiFePO4 battery according to the calculated charging current value (S103). When the reference temperature value is in a preset low temperature range, the charging current value is increased with increase of the reference temperature value; when the reference temperature value is in a preset high temperature range, the charging current value is decreased with increase of the reference temperature value; and when the reference temperature value is in a normal temperature range between the high temperature range and the low temperature range, the charging current value is a constant current value. The charging method of the present invention considers the influence of battery temperature on a battery during a charging process, avoids damage to the battery during charging with large currents, improves safety of the battery, and prolongs the service life of the battery.

Description

一种磷酸铁锂电池的充电方法及装置Method and device for charging lithium iron phosphate battery 技术领域Technical field
本发明实施例涉及通信技术领域，尤其涉及一种磷酸铁锂电池的充电方法及装置。Embodiments of the present invention relate to the field of communications technologies, and in particular, to a charging method and apparatus for a lithium iron phosphate battery.
背景技术Background technique
近年来，随着各个国家对节能减排和发展低碳经济越来越重视，磷酸铁锂(LiFePO4)电池以其独特的优点得到了越来越广泛的应用。随着磷酸铁锂电池应用的推广，电池管理系统也得到了广泛的应用，为了充分发挥电池的动力性能、提高其使用的安全性、防止电池过充和过放，延长电池的使用寿命，提高其作为储能设备的使用性能，电池管理系统需要结合电池的特性选择合适的充电方法对电池进行合理充电，从而使电池能够在使用过程中具备良好的荷电状态，提高电池的动力性能。In recent years, with the increasing attention paid by various countries to energy conservation and emission reduction and the development of low carbon economy, lithium iron phosphate (LiFePO4) batteries have been widely used for their unique advantages. With the promotion of the application of lithium iron phosphate battery, the battery management system has also been widely used, in order to give full play to the power performance of the battery, improve the safety of its use, prevent overcharging and overdischarging of the battery, prolong the service life of the battery, and improve As a performance of energy storage equipment, the battery management system needs to select a suitable charging method to properly charge the battery in combination with the characteristics of the battery, so that the battery can have a good state of charge during use and improve the power performance of the battery.
目前磷酸铁锂电池的充电方法普遍采用先恒流再恒压的充电方式，但并未考虑电池温度在充电过程中对电池的影响，会存在以下问题：At present, the charging method of lithium iron phosphate battery generally adopts a constant current and then constant voltage charging method, but does not consider the influence of the battery temperature on the battery during the charging process, and the following problems may occur:
(1)电池温度越低，电池欧姆内阻较大，大电流充电容易造成电池过度发热，会减少电池的充入容量并缩短电池的使用寿命；(1) The lower the battery temperature, the greater the ohmic internal resistance of the battery, and the high current charging is likely to cause excessive heating of the battery, which will reduce the charging capacity of the battery and shorten the service life of the battery;
(2)电池温度越高，大电流充电容易造成温度上升过快引起过充，若没有降温设施或者对电池的保护措施，将会使电池过度发热，带来危险。即使有电池的过温保护措施，也可能会造成反复过温保护、释放，带来保护器件的损坏。(2) The higher the battery temperature, the higher the current charge is likely to cause the temperature to rise too fast and cause overcharge. If there is no cooling facility or protection measures for the battery, the battery will be overheated and dangerous. Even if there is over-temperature protection of the battery, it may cause repeated over-temperature protection and release, which may cause damage to the protection device.
综上，相关技术中的先恒流再恒压的充电方式，由于未考虑电池温度在充电过程中对电池的影响，可能会降低磷酸铁锂电池的充电性能和使用的安全性，以及增加电池的损坏率，缩短电池的使用寿命。 In summary, the first constant current and constant voltage charging method in the related art may reduce the charging performance and safety of the lithium iron phosphate battery and increase the battery because the battery temperature is not considered in the charging process. The damage rate reduces the battery life.
发明内容Summary of the invention
本发明实施例提供了一种磷酸铁锂电池的充电方法及装置，以解决相关技术中没有考虑电池温度在充电过程中对磷酸铁锂电池的影响的问题。Embodiments of the present invention provide a charging method and device for a lithium iron phosphate battery to solve the problem that the impact of the battery temperature on the lithium iron phosphate battery during the charging process is not considered in the related art.
为了解决上述技术问题，本发明采用如下技术方案：In order to solve the above technical problem, the present invention adopts the following technical solutions:
依据本发明实施例的一个方面，提供了一种磷酸铁锂电池的充电方法，包括：According to an aspect of an embodiment of the present invention, a charging method of a lithium iron phosphate battery is provided, including:
采集磷酸铁锂电池中各个电芯处的温度值；Collecting temperature values at respective cells in the lithium iron phosphate battery;
根据采集到的温度值，确定一参考温度值；Determining a reference temperature value according to the collected temperature value;
根据所述参考温度值，计算充电电流值，并根据计算得到的充电电流值，对所述磷酸铁锂电池进行充电；Calculating a charging current value according to the reference temperature value, and charging the lithium iron phosphate battery according to the calculated charging current value;
其中，当所述参考温度值处于预设的低温区间时，所述充电电流值随所述参考温度值的增大而增大，且小于预设的最大充电电流值；Wherein, when the reference temperature value is in a preset low temperature interval, the charging current value increases as the reference temperature value increases, and is less than a preset maximum charging current value;
当所述参考温度值处于预设的高温区间时，所述充电电流值随所述参考温度值的增大而减少，且小于所述最大充电电流值；When the reference temperature value is in a preset high temperature interval, the charging current value decreases as the reference temperature value increases, and is smaller than the maximum charging current value;
当所述参考温度值处于所述高温区间和低温区间之间的常温区间时，所述充电电流值为小于或等于所述最大充电电流值的定电流值。When the reference temperature value is in a normal temperature range between the high temperature interval and the low temperature interval, the charging current value is a constant current value that is less than or equal to the maximum charging current value.
可选地，所述根据采集到的温度值，确定一参考温度值的步骤包括：Optionally, the step of determining a reference temperature value according to the collected temperature value includes:
从采集到的温度值中，选择出最大温度值和最小温度值；From the collected temperature values, the maximum temperature value and the minimum temperature value are selected;
在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值；When the minimum temperature value is in the low temperature interval, the minimum temperature value is taken as the reference temperature value;
在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；When the maximum temperature value is in the high temperature interval, the maximum temperature value is taken as the reference temperature value;
在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。When the minimum temperature value and the maximum temperature value are both in the normal temperature range, the maximum temperature value or the minimum temperature value is taken as the reference temperature value.
可选地，所述根据采集到的温度值，确定一参考温度值的步骤包括：Optionally, the step of determining a reference temperature value according to the collected temperature value includes:
去除采集到的温度值中的最大的第一温度值和最小的第二温度值；Removing a maximum first temperature value and a minimum second temperature value among the collected temperature values;
在去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值 和最大温度值；Determining the minimum temperature value in the remaining temperature value after removing the first temperature value and the second temperature value And maximum temperature value;
在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值；When the minimum temperature value is in the low temperature interval, the minimum temperature value is taken as the reference temperature value;
在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；When the maximum temperature value is in the high temperature interval, the maximum temperature value is taken as the reference temperature value;
在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。When the minimum temperature value and the maximum temperature value are both in the normal temperature range, the maximum temperature value or the minimum temperature value is taken as the reference temperature value.
可选地，所述根据采集到的温度值，确定一参考温度值的步骤包括：Optionally, the step of determining a reference temperature value according to the collected temperature value includes:
对采集到的温度值进行平均值计算，将计算得到的平均温度值作为所述参考温度值。The collected temperature values are averaged, and the calculated average temperature value is taken as the reference temperature value.
可选地，所述根据所述参考温度值，计算充电电流值的步骤包括：Optionally, the step of calculating a charging current value according to the reference temperature value includes:
当所述参考温度值处于所述低温区间时，按照以下公式计算充电电流值I：When the reference temperature value is in the low temperature interval, the charging current value I is calculated according to the following formula:
Figure PCTCN2017076489-appb-000001
Figure PCTCN2017076489-appb-000001
其中，Tref表示参考温度值，Tref∈(T0，T1]，(T0，T1]表示低温区间；T0，T1分别为所述低温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents a reference temperature value, T ref ∈(T 0 , T 1 ], (T 0 , T 1 ] represents a low temperature interval; T 0 , T 1 are respectively a lower limit and an upper limit of the low temperature interval , I max represents the maximum charging current value;
当所述参考温度值处于所述高温区间时，按照以下公式计算充电电流值I：When the reference temperature value is in the high temperature interval, the charging current value I is calculated according to the following formula:
Figure PCTCN2017076489-appb-000002
Figure PCTCN2017076489-appb-000002
其中，Tref表示参考温度值，Tref∈(T2，T3]，(T2，T3]表示高温区间；T2，T3分别为所述高温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents the reference temperature value, T ref ∈(T 2 , T 3 ], (T 2 , T 3 ] represents the high temperature interval; T 2 and T 3 are the lower and upper limits of the high temperature interval, respectively. , I max represents the maximum charging current value;
当所述参考温度值处于所述常温区间时，充电电流值I为所述最大充电电流值。When the reference temperature value is in the normal temperature range, the charging current value I is the maximum charging current value.
依据本发明实施例的另一个方面，提供了一种磷酸铁锂电池的充电装 置，包括：According to another aspect of an embodiment of the present invention, a charging device for a lithium iron phosphate battery is provided. Set, including:
采集模块，设置为采集磷酸铁锂电池中各个电芯处的温度值；The acquisition module is configured to collect temperature values at respective cells in the lithium iron phosphate battery;
确定模块，设置为根据采集模块采集到的温度值，确定一参考温度值；Determining a module, configured to determine a reference temperature value according to the temperature value collected by the acquisition module;
处理模块，设置为根据确定模块确定的所述参考温度值，计算充电电流值，并根据计算得到的充电电流值，对所述磷酸铁锂电池进行充电；The processing module is configured to calculate a charging current value according to the reference temperature value determined by the determining module, and charge the lithium iron phosphate battery according to the calculated charging current value;
其中，当所述参考温度值处于预设的低温区间时，所述充电电流值随所述参考温度值的增大而增大，且小于预设的最大充电电流值；Wherein, when the reference temperature value is in a preset low temperature interval, the charging current value increases as the reference temperature value increases, and is less than a preset maximum charging current value;
当所述参考温度值处于预设的高温区间时，所述充电电流值随所述参考温度值的增大而减少，且小于所述最大充电电流值；When the reference temperature value is in a preset high temperature interval, the charging current value decreases as the reference temperature value increases, and is smaller than the maximum charging current value;
当所述参考温度值处于所述高温区间和低温区间之间的常温区间时，所述充电电流值为小于或等于所述最大充电电流值的定电流值。When the reference temperature value is in a normal temperature range between the high temperature interval and the low temperature interval, the charging current value is a constant current value that is less than or equal to the maximum charging current value.
可选地，所述确定模块包括：Optionally, the determining module includes:
选择单元，设置为从采集到的温度值中，选择出最大温度值和最小温度值；Selecting a unit, set to select a maximum temperature value and a minimum temperature value from the collected temperature values;
第一确定单元，设置为在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值；a first determining unit, configured to use the minimum temperature value as the reference temperature value when the minimum temperature value is in the low temperature interval;
第二确定单元，设置为在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；a second determining unit, configured to use the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature interval;
第三确定单元，设置为在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。The third determining unit is configured to set the maximum temperature value or the minimum temperature value as the reference temperature value when both the minimum temperature value and the maximum temperature value are in the normal temperature interval.
可选地，所述确定模块包括：Optionally, the determining module includes:
筛选单元，设置为去除采集到的温度值中的最大的第一温度值和最小的第二温度值；a screening unit configured to remove a maximum first temperature value and a minimum second temperature value among the collected temperature values;
第四确定单元，设置为在筛选单元去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值和最大温度值；a fourth determining unit, configured to determine a minimum temperature value and a maximum temperature value among the remaining temperature values after the screening unit removes the first temperature value and the second temperature value;
第五确定单元，设置为在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值； a fifth determining unit, configured to set the minimum temperature value as the reference temperature value when the minimum temperature value is in the low temperature interval;
第六确定单元，设置为在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；a sixth determining unit, configured to use the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature interval;
第七确定单元，设置为在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。And a seventh determining unit configured to set the maximum temperature value or the minimum temperature value as the reference temperature value when both the minimum temperature value and the maximum temperature value are in the normal temperature interval.
可选地，所述确定模块包括：Optionally, the determining module includes:
第八确定单元，设置为对采集到的温度值进行平均值计算，将计算得到的平均温度值作为所述参考温度值。The eighth determining unit is configured to perform an average calculation on the collected temperature values, and use the calculated average temperature value as the reference temperature value.
可选地，所述处理模块包括：Optionally, the processing module includes:
第一计算单元，设置为当所述参考温度值处于所述低温区间时，按照以下公式计算充电电流值I：The first calculating unit is configured to calculate the charging current value I according to the following formula when the reference temperature value is in the low temperature interval:
Figure PCTCN2017076489-appb-000003
Figure PCTCN2017076489-appb-000003
其中，Tref表示参考温度值，Tref∈(T0，T1]，(T0，T1]表示低温区间；T0，T1分别为所述低温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents a reference temperature value, T ref ∈(T 0 , T 1 ], (T 0 , T 1 ] represents a low temperature interval; T 0 , T 1 are respectively a lower limit and an upper limit of the low temperature interval , I max represents the maximum charging current value;
第二计算单元，设置为当所述参考温度值处于所述高温区间时，按照以下公式计算充电电流值I：The second calculating unit is configured to calculate the charging current value I according to the following formula when the reference temperature value is in the high temperature interval:
Figure PCTCN2017076489-appb-000004
Figure PCTCN2017076489-appb-000004
其中，Tref表示参考温度值，Tref∈(T2，T3]，(T2，T3]表示高温区间；T2，T3分别为所述高温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents the reference temperature value, T ref ∈(T 2 , T 3 ], (T 2 , T 3 ] represents the high temperature interval; T 2 and T 3 are the lower and upper limits of the high temperature interval, respectively. , I max represents the maximum charging current value;
第三计算单元，设置为当所述参考温度值处于所述常温区间时，将所述最大充电电流值作为充电电流值I。The third calculating unit is configured to set the maximum charging current value as the charging current value I when the reference temperature value is in the normal temperature interval.
在本发明实施例中，还提供了一种计算机存储介质，该计算机存储介质可以存储有执行指令，该执行指令用于执行上述实施例中的磷酸铁锂电池的充电方法。In an embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing a charging method of the lithium iron phosphate battery in the above embodiment.
本发明实施例的有益效果是： The beneficial effects of the embodiments of the present invention are:
上述技术方案，在磷酸铁锂电池的充电过程中考虑了电池温度，结合电池在低温和高温阶段的特性，及时调整磷酸铁锂电池的充电电流，在低温阶段控制充电电流值随参考温度值的减少而减小，弱化温度较低内阻变大时，大电流充电发热的情况。在高温阶段控制充电电流值随参考温度值的增大而减少，防止电池在高温时大电流充电引起电池过热。通过上述对磷酸铁锂的充电电流的控制，从而防止电池过热的情况，提高电池的充电容量和使用的安全性，延长电池的使用寿命。The above technical solution considers the battery temperature in the charging process of the lithium iron phosphate battery, combines the characteristics of the battery in the low temperature and high temperature stages, adjusts the charging current of the lithium iron phosphate battery in time, and controls the charging current value with the reference temperature value in the low temperature stage. When the temperature is reduced and the internal resistance becomes large, the large current is charged and heated. In the high temperature phase, the control charging current value decreases as the reference temperature value increases, preventing the battery from overheating due to high current charging when the battery is at a high temperature. Through the above control of the charging current of lithium iron phosphate, the battery is prevented from overheating, the charging capacity of the battery and the safety of use are improved, and the service life of the battery is prolonged.
附图说明DRAWINGS
图1表示本发明第一实施例提供的磷酸铁锂电池的充电方法的流程图；1 is a flow chart showing a charging method of a lithium iron phosphate battery according to a first embodiment of the present invention;
图2表示本发明实施例提供的参考温度值与充电电流值的关系图；2 is a diagram showing a relationship between a reference temperature value and a charging current value according to an embodiment of the present invention;
图3表示本发明实施例提供的参考温度值与充电电流值的另一关系图；FIG. 3 is a diagram showing another relationship between a reference temperature value and a charging current value according to an embodiment of the present invention;
图4表示本发明第二实施例提供的磷酸铁锂电池的充电装置的框图；4 is a block diagram showing a charging device of a lithium iron phosphate battery according to a second embodiment of the present invention;
图5表示本发明第二实施例提供的磷酸铁锂电池的充电装置的另一框图；FIG. 5 is another block diagram showing a charging device of a lithium iron phosphate battery according to a second embodiment of the present invention; FIG.
图6表示本发明第二实施例提供的磷酸铁锂电池的充电装置的另一框图；6 is another block diagram of a charging device for a lithium iron phosphate battery according to a second embodiment of the present invention;
图7表示本发明第二实施例提供的磷酸铁锂电池的充电装置的另一框图。Fig. 7 is a block diagram showing another embodiment of a charging device for a lithium iron phosphate battery according to a second embodiment of the present invention.
具体实施方式detailed description
下面将参照附图更详细地描述本发明的示例性实施例。虽然附图中显示了本发明的示例性实施例，然而应当理解，可以以各种形式实现本发明而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本发明，并且能够将本发明的范围完整的传达给本领域的技术人员。 Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the invention has been shown and described with reference to the embodiments Rather, these embodiments are provided so that this invention may be more fully understood and the scope of the invention can be fully conveyed by those skilled in the art.
第一实施例First embodiment
本发明实施例提供了一种磷酸铁锂电池的充电方法，参见图1，该充电方法包括：Embodiments of the present invention provide a charging method for a lithium iron phosphate battery. Referring to FIG. 1, the charging method includes:
步骤S101、采集磷酸铁锂电池中各个电芯处的温度值。Step S101: Collecting temperature values at respective cells in the lithium iron phosphate battery.
其中，电芯处的温度值的采集，可根据磷酸铁锂电池内已设置好的温度采样点进行采集，每一个温度采样点处设置有一温度传感器，每一个温度采样点对应一个或多个相邻的电芯。举例来说，一般整个磷酸铁锂电池组中由4个电池包串联组成，每个电池包中包含4节电芯，在每两个电芯之间设置一个温度采样点，认为是一个电芯温度，每个电池包包含两个电芯温度，整个电池组共8个电芯温度。The temperature value at the cell can be collected according to the temperature sampling point set in the lithium iron phosphate battery, and each temperature sampling point is provided with a temperature sensor, and each temperature sampling point corresponds to one or more adjacent The battery. For example, in general, the entire lithium iron phosphate battery pack consists of four battery packs connected in series, each battery pack contains 4 batteries, and a temperature sampling point is set between each two batteries, which is considered to be a battery core. Temperature, each battery pack contains two cell temperatures, and the entire battery pack has a total of 8 cell temperatures.
其中，温度值的采集由电池管理系统完成，该电池管理系统不仅能够实时或定时获取磷酸铁锂电池的电芯温度，还能对磷酸铁锂电池的充电电流进行在线实时调节。其中，电池管理系统可采用通信直流电流系统。当然。这里所述的通信直流电源系统并非局限于本领域的系统，所有能够对磷酸铁锂电池进行充电管理的系统都可以使用本发明实施例所述的充电方法中。Among them, the temperature value is collected by the battery management system. The battery management system can not only obtain the battery temperature of the lithium iron phosphate battery in real time or timing, but also adjust the charging current of the lithium iron phosphate battery online. Among them, the battery management system can adopt a communication DC current system. of course. The communication DC power supply system described herein is not limited to the system in the art, and all systems capable of charging and managing lithium iron phosphate batteries can be used in the charging method described in the embodiments of the present invention.
步骤S102、根据采集到的温度值，确定一参考温度值。Step S102: Determine a reference temperature value according to the collected temperature value.
其中，参考温度值是用来确定磷酸铁锂电池的充电电流值的。参考温度值的确定需考虑到磷酸铁锂电池的温度特性以及温度特性对充电过程的影响。由于磷酸铁锂电池在温度较低和较高时，大电流充电都会对充电过程有较大影响，因此可选取采集到的温度值中的最小温度值或最大温度值作为参考温度值。为了简化计算过程，提高计算结果的稳定性，也可以对采集到的温度值进行平均值计算，将计算得到的平均温度值作为参考温度值。Wherein, the reference temperature value is used to determine the charging current value of the lithium iron phosphate battery. The determination of the reference temperature value takes into account the temperature characteristics of the lithium iron phosphate battery and the influence of the temperature characteristics on the charging process. Since the lithium iron phosphate battery has a relatively high temperature and high temperature, the large current charging has a great influence on the charging process, so the minimum temperature value or the maximum temperature value among the collected temperature values can be selected as the reference temperature value. In order to simplify the calculation process and improve the stability of the calculation result, the average value of the collected temperature values may also be calculated, and the calculated average temperature value is used as the reference temperature value.
步骤S103、根据参考温度值，计算充电电流值，并根据计算得到的充电电流值，对磷酸铁锂电池进行充电。Step S103: Calculate a charging current value according to the reference temperature value, and charge the lithium iron phosphate battery according to the calculated charging current value.
其中，考虑到磷酸铁锂电池的温度特性，当参考温度值处于预设的低 温区间时，使充电电流值随参考温度值的增大而增大，且小于预设的最大充电电流值。当参考温度值处于预设的高温区间时，使充电电流值随参考温度值的增大而减少，且小于最大充电电流值。这样，就能弱化在电池温度较低内阻变大时，大电流充电造成电池过度发热的情况以及在电池温度较高时，大电流充电造成温度上升过快所引起的过充的问题。而当参考温度值处于高温区间和低温区间之间的常温区间时，充电电流值为小于或等于最大充电电流值的定电流值，此时，电池性能比较稳定，可采用较大电流进行快速充电。Wherein, considering the temperature characteristics of the lithium iron phosphate battery, when the reference temperature value is at a preset low In the temperature interval, the charging current value increases as the reference temperature value increases, and is less than the preset maximum charging current value. When the reference temperature value is in the preset high temperature interval, the charging current value is decreased as the reference temperature value increases, and is smaller than the maximum charging current value. In this way, it is possible to weaken the problem that the battery is excessively heated when the battery temperature is low and the large current is charged, and the overcharge is caused by the high temperature charging causing the temperature to rise too fast when the battery temperature is high. When the reference temperature value is in the normal temperature range between the high temperature range and the low temperature range, the charging current value is a constant current value less than or equal to the maximum charging current value. At this time, the battery performance is relatively stable, and a large current can be used for fast charging. .
本发明实施例中，所述高温区间、低温区间和常温区间可以根据磷酸铁锂电池在日常使用环境下的日常温度范围以及在该日常温度范围下的充电特性进行设置。这里的上述三个温度区间是互不重叠的温度区间，且三个温度区间构成一连续的温度范围，例如，对应于日常使用环境下的日常温度范围：0～50℃,其中，低温区间可设置为(0，10]，常温区间设置为(10，45]，高温区间设置为(45，50]。In the embodiment of the present invention, the high temperature interval, the low temperature interval, and the normal temperature interval may be set according to a daily temperature range of the lithium iron phosphate battery in a daily use environment and a charging characteristic in the daily temperature range. The above three temperature ranges are non-overlapping temperature intervals, and the three temperature intervals constitute a continuous temperature range, for example, corresponding to a daily temperature range in a daily use environment: 0 to 50 ° C, wherein the low temperature range is Set to (0,10), the normal temperature range is set to (10,45), and the high temperature range is set to (45,50).
本发明实施例中，最大充电电流值通常是电池组出厂时的默认最大充电电流。通常，该最大充电电流可以根据电池组的额度容量来计算。当磷酸铁锂电池组的额定容量为xAh(x表示额定容量数值，A表示安培，h表示小时)时，最大充电电流值可以设置为k*xA，这里，k为一个小于1的常数。例如，电池组额定容量为100Ah，则最大充电电流值为0.5×100A，即50A。In the embodiment of the present invention, the maximum charging current value is usually the default maximum charging current when the battery pack is shipped. Typically, the maximum charging current can be calculated based on the capacity of the battery pack. When the rated capacity of the lithium iron phosphate battery pack is xAh (x represents the rated capacity value, A represents amperes, h represents hours), the maximum charging current value can be set to k*xA, where k is a constant less than one. For example, if the battery pack has a rated capacity of 100 Ah, the maximum charging current value is 0.5 x 100 A, or 50 A.
优选地，本发明实施例中将最小温度值或最大温度值作为参考温度值，以计算磷酸铁锂电池的充电电流，其具体实现过程为：从采集到的温度值中，选择出最大温度值和最小温度值，在最小温度值处于低温区间，将最小温度值作为参考温度值；在最大温度值处于高温区间时，将最大温度值作为参考温度值；在最小温度值和最大温度值均处于常温区间时，将最大温度值或最小温度值作为参考温度值。Preferably, in the embodiment of the present invention, the minimum temperature value or the maximum temperature value is used as the reference temperature value to calculate the charging current of the lithium iron phosphate battery, and the specific implementation process is: selecting the maximum temperature value from the collected temperature values. And the minimum temperature value, the minimum temperature value is in the low temperature range, and the minimum temperature value is used as the reference temperature value; when the maximum temperature value is in the high temperature range, the maximum temperature value is taken as the reference temperature value; the minimum temperature value and the maximum temperature value are in the In the normal temperature range, the maximum temperature value or the minimum temperature value is used as the reference temperature value.
其中，本发明实施例中的低温区间、常温区间以及高温区间的设定是 结合电池性能设置的，一般设置低温区间的上限值与高温区间的下限值相差较大，这样，可避免出现最小温度值处于低温区间，同时最大温度值处于高温区间的情况出现，因此，本发明实施例中不考虑该情况的出现，即只要最小温度值处于低温区间，就将最小温度值作为参考温度值；最大温度值处于高温区间时，就将最大温度值作为参考温度值；最小温度值和最大温度值均处于常温区间时，就将最大温度值或最小温度值作为参考温度值。The setting of the low temperature interval, the normal temperature interval, and the high temperature interval in the embodiment of the present invention is In combination with the battery performance setting, the upper limit value of the low temperature interval is generally different from the lower limit value of the high temperature interval, so that the case where the minimum temperature value is in the low temperature range and the maximum temperature value is in the high temperature range can be avoided, therefore, In the embodiment of the present invention, the occurrence of the situation is not considered, that is, as long as the minimum temperature value is in the low temperature range, the minimum temperature value is taken as the reference temperature value; when the maximum temperature value is in the high temperature range, the maximum temperature value is taken as the reference temperature value; When the temperature value and the maximum temperature value are both in the normal temperature range, the maximum temperature value or the minimum temperature value is used as the reference temperature value.
可选地，在将最大温度值或最小温度值作为参考温度值时，为提高电池管理系统对磷酸铁锂电池的充电电流管理的精确度，避免一些极端温度值数据造成的不良影响，可先去除采集到的温度值中的最大的第一温度值和最小的第二温度值，在去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值和最大温度值。在最小温度值处于低温区间时，将最小温度值作为参考温度值；在最大温度值处于高温区间时，将最大温度值作为参考温度值；在最小温度值和最大温度值均处于常温区间时，将最大温度值或最小温度值作为参考温度值。Optionally, when the maximum temperature value or the minimum temperature value is used as the reference temperature value, in order to improve the accuracy of the battery management system for charging current management of the lithium iron phosphate battery, and avoiding the adverse effects caused by some extreme temperature value data, The largest first temperature value and the smallest second temperature value of the collected temperature values are removed, and among the remaining temperature values after the first temperature value and the second temperature value are removed, the minimum temperature value and the maximum temperature value are determined. When the minimum temperature value is in the low temperature range, the minimum temperature value is taken as the reference temperature value; when the maximum temperature value is in the high temperature range, the maximum temperature value is used as the reference temperature value; when the minimum temperature value and the maximum temperature value are in the normal temperature range, Use the maximum temperature value or the minimum temperature value as the reference temperature value.
可选地，本发明实施例优选采用线性调整方式，调整当参考温度值在低温区间或高温区间的充电电流值，其具体实现为：Optionally, the embodiment of the present invention preferably adopts a linear adjustment manner to adjust a charging current value when the reference temperature value is in a low temperature interval or a high temperature interval, and the specific implementation is:
(1)当参考温度值处于低温区间时，按照以下公式计算充电电流值I：(1) When the reference temperature value is in the low temperature range, calculate the charging current value I according to the following formula:
Figure PCTCN2017076489-appb-000005
Figure PCTCN2017076489-appb-000005
其中，Tref表示参考温度值，Tref∈(T0，T1]，(T0，T1]表示低温区间，T0，T1分别为该低温区间的下限值和上限值，T1取值为大于0的正数，T0根据日常使用的温度值确定，可以是大于0的一个数值，也可以是小于或等于0的一个数值，Imax表示预设的最大充电电流值。Where T ref represents the reference temperature value, T ref ∈(T 0 , T 1 ], (T 0 , T 1 ] represents the low temperature interval, and T 0 and T 1 are the lower limit and the upper limit of the low temperature interval, respectively. T 1 takes a positive value greater than 0, T 0 is determined according to the temperature value used daily, may be a value greater than 0, or may be a value less than or equal to 0, I max represents a preset maximum charging current value .
由上述公式可看出，该公式为一斜率为正的线性函数，充电电流值I随参考温度值的增大而增大，使充电电流值随电池温度的变化而进行调整，从而降低在电池温度较低时，采用大电流充电对电池造成的损坏。It can be seen from the above formula that the formula is a linear function with a positive slope, and the charging current value I increases as the reference temperature value increases, so that the charging current value is adjusted as the battery temperature changes, thereby lowering the battery. When the temperature is low, the battery is damaged by high current charging.
(2)当参考温度值处于高温区间时，按照以下公式计算充电电流值I： (2) When the reference temperature value is in the high temperature range, calculate the charging current value I according to the following formula:
Figure PCTCN2017076489-appb-000006
Figure PCTCN2017076489-appb-000006
其中，Tref表示参考温度值，Tref∈(T2，T3]，(T2，T3]表示高温区间，T2，T3分别为高温区间的下限值和上限值，Imax表示预设的最大充电电流值。Where T ref represents the reference temperature value, T ref ∈(T 2 , T 3 ], (T 2 , T 3 ] represents the high temperature interval, and T 2 and T 3 are the lower and upper limits of the high temperature interval, respectively. Max represents the preset maximum charging current value.
由上述公式可看出，该公式为一斜率为负的线性函数，充电电流值I随参考温度值的增大而减小，使充电电流值随电池温度的变化而进行调整，从而降低在电池温度较高时，采用大电流充电所造成的过充问题。It can be seen from the above formula that the formula is a linear function with a negative slope, and the charging current value I decreases as the reference temperature value increases, so that the charging current value is adjusted as the battery temperature changes, thereby lowering the battery. When the temperature is high, the overcharge problem caused by charging with a large current is used.
需要说明的是，T0<T1<T2<T3。It should be noted that T 0 <T 1 <T 2 <T 3 .
此外，当参考温度值处于常温区间时，优选预设的最大充电电流值作为充电电流值I。Further, when the reference temperature value is in the normal temperature range, the preset maximum charging current value is preferably used as the charging current value I.
为进一步理解上述充电电流值的计算过程，可参见图2，其中，附图中，横轴表示参考温度值T(单位：℃)，纵轴表示充电电流值I(单位：A)，在(T0，T1]区间，充电电流值随参考温度值的增大而增大；在(T1，T2]区间，充电电流值为定电流值，附图中为预设的最大充电电流值；在(T2，T3]区间，充电电流值随参考温度值的增大而减小。其中，在该附图中T0取值为0。To further understand the calculation process of the above charging current value, reference can be made to FIG. 2, in which, in the drawing, the horizontal axis represents the reference temperature value T (unit: ° C), and the vertical axis represents the charging current value I (unit: A), at ( In the interval T 0 , T 1 ], the charging current value increases as the reference temperature value increases; in the (T 1 , T 2 ) interval, the charging current value is a constant current value, and the preset maximum charging current is in the drawing. Value; in the (T 2 , T 3 ) interval, the charging current value decreases as the reference temperature value increases, wherein T 0 takes a value of 0 in the drawing.
需要说明的是，参考温度值处于低温区间或高温区间时的充电电流值的调整，并不仅限于上述的线性调整，也可是如图3所示的非线性调整，当然还可以是其他可实现形式，但凡是满足当参考温度值处于预设的低温区间时，使充电电流值随参考温度值的增大而增大；当参考温度值处于预设的高温区间时，使充电电流值随参考温度值的增大而减少的条件，均在本发明实施例的保护范围内。It should be noted that the adjustment of the charging current value when the reference temperature value is in the low temperature range or the high temperature range is not limited to the linear adjustment described above, or may be the nonlinear adjustment as shown in FIG. 3, and may of course be other achievable forms. However, when the reference temperature value is in the preset low temperature range, the charging current value increases with the increase of the reference temperature value; when the reference temperature value is in the preset high temperature range, the charging current value is made with the reference temperature The condition that the value is increased and decreased is within the protection scope of the embodiment of the present invention.
综上所述，本发明实施例提供的磷酸铁锂电池的充电方法，在磷酸铁锂电池的充电过程中考虑了电池温度，结合电池在低温和高温阶段的特性，及时调整磷酸铁锂电池的充电电流，即在低温阶段控制充电电流值随参考温度值的减少而减小，弱化温度较低内阻变大时，大电流充电造成过度发热的情况。在高温阶段控制充电电流值随参考温度值的增大而减少，防止 电池在高温时大电流充电而引起的过充。这样，若磷酸铁锂电池系统中没有降温设备，可以从软件层面提前预防电池过热带来的危险，提高电池使用安全性。对于有电池过温保护设备的磷酸铁锂电池系统来说，则可以从软件层面降低电池过温的保护机会，避免保护器件反复动作而引起的损坏，延长电池过温保护设备的使用寿命。In summary, the charging method of the lithium iron phosphate battery provided by the embodiment of the present invention considers the battery temperature in the charging process of the lithium iron phosphate battery, and adjusts the characteristics of the battery in the low temperature and high temperature stages to adjust the lithium iron phosphate battery in time. The charging current, that is, the control charging current value decreases with the decrease of the reference temperature value in the low temperature phase, and when the weakening temperature is low, the internal resistance becomes large, and the large current charging causes excessive heating. Controlling the charging current value at the high temperature stage decreases as the reference temperature value increases, preventing Overcharge caused by high current charging of the battery at high temperatures. In this way, if there is no cooling device in the lithium iron phosphate battery system, the danger caused by overheating of the battery can be prevented in advance from the software level, and the safety of the battery can be improved. For the lithium iron phosphate battery system with battery over-temperature protection device, the protection opportunity of the battery over-temperature can be reduced from the software level, the damage caused by the repeated action of the protection device can be avoided, and the service life of the battery over-temperature protection device can be prolonged.
第二实施例Second embodiment
依据本发明实施例的另一个方面，提供了一种磷酸铁锂电池的充电装置，参见图4，该充电装置包括：According to another aspect of an embodiment of the present invention, a charging device for a lithium iron phosphate battery is provided. Referring to FIG. 4, the charging device includes:
采集模块401，设置为采集磷酸铁锂电池中各个电芯处的温度值。The acquisition module 401 is configured to collect temperature values at respective cells in the lithium iron phosphate battery.
其中，电芯处的温度值的采集，可根据磷酸铁锂电池内已设置好的温度采样点进行采集，每一个温度采样点处设置有一温度传感器，每一个温度采样点对应一个或多个相邻的电芯。举例来说，一般整个磷酸铁锂电池组中由4个电池包串联组成，每个电池包中包含4节电芯，在每两个电芯之间设置一个温度采样点，认为是一个电芯温度，每个电池包包含两个电芯温度，整个电池组共8个电芯温度。The temperature value at the cell can be collected according to the temperature sampling point set in the lithium iron phosphate battery, and each temperature sampling point is provided with a temperature sensor, and each temperature sampling point corresponds to one or more adjacent The battery. For example, in general, the entire lithium iron phosphate battery pack consists of four battery packs connected in series, each battery pack contains 4 batteries, and a temperature sampling point is set between each two batteries, which is considered to be a battery core. Temperature, each battery pack contains two cell temperatures, and the entire battery pack has a total of 8 cell temperatures.
其中，温度值的采集由电池管理系统中的采集模块401完成，该电池管理系统不仅能够实时或定时获取磷酸铁锂电池的电芯温度，还能对磷酸铁锂电池的充电电流进行在线实时调节。其中，电池管理系统可采用通信直流电流系统。当然。这里所述的通信直流电源系统并非局限于本领域的系统，所有能够对磷酸铁锂电池进行充电管理的系统都可以使用本发明实施例所述的充电方法中。The collection of the temperature value is completed by the acquisition module 401 in the battery management system, and the battery management system can not only obtain the cell temperature of the lithium iron phosphate battery in real time or timing, but also adjust the charging current of the lithium iron phosphate battery online. . Among them, the battery management system can adopt a communication DC current system. of course. The communication DC power supply system described herein is not limited to the system in the art, and all systems capable of charging and managing lithium iron phosphate batteries can be used in the charging method described in the embodiments of the present invention.
确定模块402，设置为根据采集模块401采集到的温度值，确定一参考温度值。The determining module 402 is configured to determine a reference temperature value according to the temperature value collected by the collecting module 401.
其中，参考温度值是用来确定磷酸铁锂电池的充电电流值的。参考温度值的确定需考虑到磷酸铁锂电池的温度特性以及温度特性对充电过程的影响。由于磷酸铁锂电池在温度较低和较高时，大电流充电都会对充电过程有较大影响，因此可选取采集到的温度值中的最小温度值或最大温度 值作为参考温度值。为了简化计算过程，提高计算结果的稳定性，也可以对采集到的温度值进行平均值计算，将计算得到的平均温度值作为参考温度值。Wherein, the reference temperature value is used to determine the charging current value of the lithium iron phosphate battery. The determination of the reference temperature value takes into account the temperature characteristics of the lithium iron phosphate battery and the influence of the temperature characteristics on the charging process. Since the lithium iron phosphate battery has a relatively high temperature and high temperature, the large current charging has a great influence on the charging process, so the minimum temperature value or the maximum temperature among the collected temperature values can be selected. The value is taken as the reference temperature value. In order to simplify the calculation process and improve the stability of the calculation result, the average value of the collected temperature values may also be calculated, and the calculated average temperature value is used as the reference temperature value.
处理模块403，设置为根据确定模块确定的参考温度值，计算充电电流值，并根据计算得到的充电电流值，对磷酸铁锂电池进行充电。The processing module 403 is configured to calculate a charging current value according to the reference temperature value determined by the determining module, and charge the lithium iron phosphate battery according to the calculated charging current value.
其中，考虑到磷酸铁锂电池的温度特性，当参考温度值处于预设的低温区间时，使充电电流值随参考温度值的增大而增大，且小于预设的最大充电电流值。当参考温度值处于预设的高温区间时，使充电电流值随参考温度值的增大而减少，且小于最大充电电流值。这样，就能弱化在电池温度较低内阻变大时，大电流充电造成电池过度发热的情况以及在电池温度较高时，大电流充电造成温度上升过快所引起的过充的问题。而当参考温度值处于高温区间和低温区间之间的常温区间时，充电电流值为小于或等于最大充电电流值的定电流值，此时，电池性能比较稳定，可采用较大电流进行快速充电。Wherein, considering the temperature characteristic of the lithium iron phosphate battery, when the reference temperature value is in the preset low temperature range, the charging current value is increased as the reference temperature value increases, and is smaller than the preset maximum charging current value. When the reference temperature value is in the preset high temperature interval, the charging current value is decreased as the reference temperature value increases, and is smaller than the maximum charging current value. In this way, it is possible to weaken the problem that the battery is excessively heated when the battery temperature is low and the large current is charged, and the overcharge is caused by the high temperature charging causing the temperature to rise too fast when the battery temperature is high. When the reference temperature value is in the normal temperature range between the high temperature range and the low temperature range, the charging current value is a constant current value less than or equal to the maximum charging current value. At this time, the battery performance is relatively stable, and a large current can be used for fast charging. .
本发明实施例中，所述高温区间、低温区间和常温区间可以根据磷酸铁锂电池在日常使用环境下的日常温度范围以及在该日常温度范围下的充电特性进行设置。这里的上述三个温度区间是互不重叠的温度区间，且三个温度区间构成一连续的温度范围，例如，对应于日常使用环境下的日常温度范围：0～50℃,其中，低温区间可设置为(0，10]，常温区间设置为(10，45]，高温区间设置为(45，50]。In the embodiment of the present invention, the high temperature interval, the low temperature interval, and the normal temperature interval may be set according to a daily temperature range of the lithium iron phosphate battery in a daily use environment and a charging characteristic in the daily temperature range. The above three temperature ranges are non-overlapping temperature intervals, and the three temperature intervals constitute a continuous temperature range, for example, corresponding to a daily temperature range in a daily use environment: 0 to 50 ° C, wherein the low temperature range is Set to (0,10), the normal temperature range is set to (10,45), and the high temperature range is set to (45,50).
本发明实施例中，最大充电电流值通常是电池组出厂时的默认最大充电电流。通常，该最大充电电流可以根据电池组的额度容量来计算。当磷酸铁锂电池组的额定容量为xAh(x表示额定容量数值，A表示安培，h表示小时)时，最大充电电流值可以设置为k*xA，这里，k为一小于1的常数。例如，电池组额定容量为100Ah，则最大充电电流值为0.5×100A，即50A。In the embodiment of the present invention, the maximum charging current value is usually the default maximum charging current when the battery pack is shipped. Typically, the maximum charging current can be calculated based on the capacity of the battery pack. When the rated capacity of the lithium iron phosphate battery pack is xAh (x represents the rated capacity value, A represents amperes, h represents hours), the maximum charging current value can be set to k*xA, where k is a constant less than one. For example, if the battery pack has a rated capacity of 100 Ah, the maximum charging current value is 0.5 x 100 A, or 50 A.
可选地，参见图5，确定模块402包括： Optionally, referring to FIG. 5, the determining module 402 includes:
选择单元4021，设置为从采集到的温度值中，选择出最大温度值和最小温度值。The selecting unit 4021 is configured to select a maximum temperature value and a minimum temperature value from among the collected temperature values.
本发明实施例中将最小温度值或最大温度值作为参考温度值，以计算磷酸铁锂电池的充电电流。In the embodiment of the invention, the minimum temperature value or the maximum temperature value is used as the reference temperature value to calculate the charging current of the lithium iron phosphate battery.
第一确定单元4022，设置为在最小温度值处于低温区间时，将最小温度值作为参考温度值。The first determining unit 4022 is configured to set the minimum temperature value as the reference temperature value when the minimum temperature value is in the low temperature range.
第二确定单元4023，设置为在最大温度值处于高温区间时，将最大温度值作为参考温度值。The second determining unit 4023 is configured to set the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature range.
第三确定单元4024，设置为在最小温度值和最大温度值均处于常温区间时，将最大温度值或最小温度值作为参考温度值。The third determining unit 4024 is configured to set the maximum temperature value or the minimum temperature value as the reference temperature value when both the minimum temperature value and the maximum temperature value are in the normal temperature range.
其中，本发明实施例中的低温区间、常温区间以及高温区间的设定是结合电池性能设置的，一般低温区间的上限值与高温区间的下限值相差较大，这样，可避免出现最小温度值处于低温区间，同时最大温度值处于高温区间的情况出现，因此，本发明实施例中不考虑该情况的出现，即只要最小温度值处于低温区间，就将最小温度值作为参考温度值；最大温度值处于高温区间时，就将最大温度值作为参考温度值；最小温度值和最大温度值均处于常温区间时，就将最大温度值或最小温度值作为参考温度值。The setting of the low temperature interval, the normal temperature interval and the high temperature interval in the embodiment of the present invention is set in combination with the battery performance, and the upper limit value of the general low temperature interval and the lower limit value of the high temperature interval are largely different, so that the minimum can be avoided. The temperature value is in the low temperature range, and the maximum temperature value is in the high temperature range. Therefore, the occurrence of the situation is not considered in the embodiment of the present invention, that is, as long as the minimum temperature value is in the low temperature range, the minimum temperature value is taken as the reference temperature value; When the maximum temperature value is in the high temperature range, the maximum temperature value is taken as the reference temperature value; when the minimum temperature value and the maximum temperature value are in the normal temperature range, the maximum temperature value or the minimum temperature value is used as the reference temperature value.
可选地，参见图6，确定模块402包括：Optionally, referring to FIG. 6, the determining module 402 includes:
筛选单元4025，设置为去除采集到的温度值中的最大的第一温度值和最小的第二温度值。The screening unit 4025 is configured to remove the largest first temperature value and the smallest second temperature value among the collected temperature values.
第四确定单元4026，设置为在筛选单元去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值和最大温度值。The fourth determining unit 4026 is configured to determine the minimum temperature value and the maximum temperature value among the remaining temperature values after the screening unit removes the first temperature value and the second temperature value.
第五确定单元4027，设置为在最小温度值处于低温区间时，将最小温度值作为参考温度值。The fifth determining unit 4027 is configured to set the minimum temperature value as the reference temperature value when the minimum temperature value is in the low temperature range.
第六确定单元4028，设置为在最大温度值处于高温区间时，将最大温度值作为参考温度值。The sixth determining unit 4028 is configured to set the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature range.
第七确定单元4029，设置为在最小温度值和最大温度值均处于常温区 间时，将最大温度值或最小温度值作为参考温度值。The seventh determining unit 4029 is configured to be in the normal temperature zone when the minimum temperature value and the maximum temperature value are both When the time is between, the maximum temperature value or the minimum temperature value is used as the reference temperature value.
在将最大温度值或最小温度值作为参考温度值时，为提高电池管理系统对磷酸铁锂电池的充电电流管理的精确度，避免一些极端温度值数据造成的不良影响，可先去除采集到的温度值中的最大的第一温度值和最小的第二温度值，在去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值和最大温度值。When the maximum temperature value or the minimum temperature value is used as the reference temperature value, in order to improve the accuracy of the battery management system for the charging current management of the lithium iron phosphate battery, and avoid the adverse effects caused by some extreme temperature value data, the collected The maximum first temperature value and the minimum second temperature value among the temperature values determine the minimum temperature value and the maximum temperature value among the remaining temperature values after the removal of the first temperature value and the second temperature value.
可选地，参见图7，确定模块402包括：Optionally, referring to FIG. 7, the determining module 402 includes:
第八确定单元40210，设置为对采集到的温度值进行平均值计算，将计算得到的平均值作为参考温度值。The eighth determining unit 40210 is configured to perform an average calculation on the collected temperature values, and use the calculated average value as the reference temperature value.
为了简化计算过程，提高计算结果的稳定性，也可以对采集到的温度值进行平均值计算，将计算得到的平均温度值作为参考温度值。In order to simplify the calculation process and improve the stability of the calculation result, the average value of the collected temperature values may also be calculated, and the calculated average temperature value is used as the reference temperature value.
可选地，参见图5～7，处理模块403包括：Optionally, referring to FIG. 5-7, the processing module 403 includes:
第一计算单元4031，设置为当参考温度值处于低温区间时，按照以下公式计算充电电流值I：The first calculating unit 4031 is configured to calculate the charging current value I according to the following formula when the reference temperature value is in the low temperature range:
Figure PCTCN2017076489-appb-000007
Figure PCTCN2017076489-appb-000007
其中，Tref表示参考温度值，Tref∈(T0，T1]，(T0，T1]表示低温区间，T0，T1分别为低温区间的下限值和上限值，T1取值为大于0的正数，T0根据日常使用的温度值确定，可以是大于0的一个数值，也可以是小于或等于0的一个数值，Imax表示预设的最大充电电流值。Where T ref represents the reference temperature value, T ref ∈(T 0 , T 1 ], (T 0 , T 1 ] represents the low temperature interval, and T 0 and T 1 are the lower and upper limits of the low temperature interval, respectively, T 1 is a positive number greater than 0, T 0 is determined according to the temperature value used daily, may be a value greater than 0, or may be a value less than or equal to 0, and I max represents a preset maximum charging current value.
由上述公式可看出，该公式为一斜率为正的线性函数，充电电流值I随参考温度值的增大而增大，使充电电流值随电池温度的变化而进行调整，从而降低在电池温度较低时，采用大电流充电对电池造成的损坏。It can be seen from the above formula that the formula is a linear function with a positive slope, and the charging current value I increases as the reference temperature value increases, so that the charging current value is adjusted as the battery temperature changes, thereby lowering the battery. When the temperature is low, the battery is damaged by high current charging.
第二计算单元4032，设置为当参考温度值处于高温区间时，按照以下公式计算充电电流值I：The second calculating unit 4032 is configured to calculate the charging current value I according to the following formula when the reference temperature value is in the high temperature range:
Figure PCTCN2017076489-appb-000008
Figure PCTCN2017076489-appb-000008
其中，Tref表示参考温度值，Tref∈(T2，T3]，(T2，T3]表示高温区间， T2，T3分别为高温区间的下限值和上限值，Imax表示预设的最大充电电流值。Where T ref represents the reference temperature value, T ref ∈(T 2 , T 3 ], (T 2 , T 3 ] represents the high temperature interval, and T 2 and T 3 are the lower and upper limits of the high temperature interval, respectively. Max represents the preset maximum charging current value.
由上述公式可看出，该公式为一斜率为负的线性函数，充电电流值I随参考温度值的增大而减小，使充电电流值随电池温度的变化而进行调整，从而降低在电池温度较高时，采用大电流充电所造成的过充问题。It can be seen from the above formula that the formula is a linear function with a negative slope, and the charging current value I decreases as the reference temperature value increases, so that the charging current value is adjusted as the battery temperature changes, thereby lowering the battery. When the temperature is high, the overcharge problem caused by charging with a large current is used.
需要说明的是，T0<T1<T2<T3。It should be noted that T 0 <T 1 <T 2 <T 3 .
第三计算单元4033，设置为当参考温度值处于常温区间时，将最大充电电流值作为充电电流值I。The third calculating unit 4033 is configured to set the maximum charging current value as the charging current value I when the reference temperature value is in the normal temperature range.
当参考温度值处于常温区间时，优选预设的最大充电电流值作为充电电流值I。When the reference temperature value is in the normal temperature range, the preset maximum charging current value is preferably used as the charging current value I.
为进一步理解上述充电电流值的计算过程，可参见图2，其中，附图中，横轴表示参考温度值T(单位：℃)，纵轴表示充电电流值I(单位：A)，在(T0，T1]之间，充电电流值随参考温度值的增大而增大；在(T1，T2]之间，充电电流值为定电流值，附图中为预设的最大充电电流值；在(T2，T3]之间，充电电流值随参考温度值的增大而减小。其中，在该附图中T0取值为0。To further understand the calculation process of the above charging current value, reference can be made to FIG. 2, in which, in the drawing, the horizontal axis represents the reference temperature value T (unit: ° C), and the vertical axis represents the charging current value I (unit: A), at ( Between T 0 and T 1 ], the charging current value increases with the increase of the reference temperature value; between (T 1 , T 2 ], the charging current value is the constant current value, which is the preset maximum in the drawing. The charging current value; between (T 2 , T 3 ), the charging current value decreases as the reference temperature value increases, wherein T 0 takes a value of 0 in the drawing.
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:
S1，采集磷酸铁锂电池中各个电芯处的温度值；S1, collecting temperature values at respective cells in the lithium iron phosphate battery;
S2，根据采集到的温度值，确定一参考温度值；S2, determining a reference temperature value according to the collected temperature value;
S3，根据参考温度值，计算充电电流值，并根据计算得到的充电电流值，对磷酸铁锂电池进行充电；S3, calculating a charging current value according to the reference temperature value, and charging the lithium iron phosphate battery according to the calculated charging current value;
其中，当参考温度值处于预设的低温区间时，充电电流值随参考温度值的增大而增大，且小于预设的最大充电电流值。Wherein, when the reference temperature value is in the preset low temperature interval, the charging current value increases as the reference temperature value increases, and is smaller than the preset maximum charging current value.
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random  Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。Optionally, in this embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a random access memory (RAM, Random). A variety of media that can store program code, such as Access Memory), removable hard disk, disk, or optical disk.
需要说明的是，参考温度值处于低温区间或高温区间时的充电电流值的调整，并不仅限于上述的线性调整，也可是如图3所示的非线性调整，当然还可以是其他可实现形式，但凡是满足当参考温度值处于预设的低温区间时，使充电电流值随参考温度值的增大而增大；当参考温度值处于预设的高温区间时，使充电电流值随参考温度值的增大而减少的条件，均在本发明实施例的保护范围内。It should be noted that the adjustment of the charging current value when the reference temperature value is in the low temperature range or the high temperature range is not limited to the linear adjustment described above, or may be the nonlinear adjustment as shown in FIG. 3, and may of course be other achievable forms. However, when the reference temperature value is in the preset low temperature range, the charging current value increases with the increase of the reference temperature value; when the reference temperature value is in the preset high temperature range, the charging current value is made with the reference temperature The condition that the value is increased and decreased is within the protection scope of the embodiment of the present invention.
综上所述，本发明实施例提供的磷酸铁锂电池的充电装置，在磷酸铁锂电池的充电过程中考虑了电池温度，结合电池在低温和高温阶段的特性，及时调整磷酸铁锂电池的充电电流，即在低温阶段控制充电电流值随参考温度值的减少而减小，弱化温度较低内阻变大时，大电流充电造成过度发热的情况。在高温阶段控制充电电流值随参考温度值的增大而减少，防止电池在高温时大电流充电而引起的过充。这样，若磷酸铁锂电池系统中没有降温设备，可以从软件层面提前预防电池过热带来的危险，提高电池使用安全性。对于有电池过温保护设备的磷酸铁锂电池系统来说，则可以从软件层面降低电池过温的保护机会，避免保护器件反复动作而引起的损坏，延长电池过温保护设备的使用寿命。In summary, the charging device of the lithium iron phosphate battery provided by the embodiment of the present invention considers the battery temperature in the charging process of the lithium iron phosphate battery, and adjusts the characteristics of the battery in the low temperature and high temperature stages, and timely adjusts the lithium iron phosphate battery. The charging current, that is, the control charging current value decreases with the decrease of the reference temperature value in the low temperature phase, and when the weakening temperature is low, the internal resistance becomes large, and the large current charging causes excessive heating. In the high temperature phase, the control charging current value decreases as the reference temperature value increases, preventing overcharging caused by high current charging of the battery at high temperatures. In this way, if there is no cooling device in the lithium iron phosphate battery system, the danger caused by overheating of the battery can be prevented in advance from the software level, and the safety of the battery can be improved. For the lithium iron phosphate battery system with battery over-temperature protection device, the protection opportunity of the battery over-temperature can be reduced from the software level, the damage caused by the repeated action of the protection device can be avoided, and the service life of the battery over-temperature protection device can be prolonged.
以上所述的是本发明的优选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本发明所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本发明的保护范围内。The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. Within the scope of protection of the invention.
工业实用性Industrial applicability
在本发明实施例中，在磷酸铁锂电池的充电过程中考虑了电池温度，结合电池在低温和高温阶段的特性，及时调整磷酸铁锂电池的充电电流，在低温阶段控制充电电流值随参考温度值的减少而减小，弱化温度较低内阻变大时，大电流充电发热的情况。在高温阶段控制充电电流值随参考温度值的增大而减少，防止电池在高温时大电流充电引起电池过热。通过上 述对磷酸铁锂的充电电流的控制，从而防止电池过热的情况，提高电池的充电容量和使用的安全性，延长电池的使用寿命。 In the embodiment of the present invention, the battery temperature is considered in the charging process of the lithium iron phosphate battery, and the charging current of the lithium iron phosphate battery is adjusted in time according to the characteristics of the battery in the low temperature and high temperature stages, and the charging current value is controlled with reference in the low temperature stage. When the temperature value is decreased, the weakening temperature is low, and when the internal resistance becomes large, the large current is charged and heated. In the high temperature phase, the control charging current value decreases as the reference temperature value increases, preventing the battery from overheating due to high current charging when the battery is at a high temperature. Through The control of the charging current of lithium iron phosphate is described, thereby preventing the battery from overheating, improving the charging capacity of the battery and the safety of use, and prolonging the service life of the battery.

Claims (10)

  1. 一种磷酸铁锂电池的充电方法，包括：A method for charging a lithium iron phosphate battery, comprising:
    采集磷酸铁锂电池中各个电芯处的温度值；Collecting temperature values at respective cells in the lithium iron phosphate battery;
    根据采集到的温度值，确定一参考温度值；Determining a reference temperature value according to the collected temperature value;
    根据所述参考温度值，计算充电电流值，并根据计算得到的充电电流值，对所述磷酸铁锂电池进行充电；Calculating a charging current value according to the reference temperature value, and charging the lithium iron phosphate battery according to the calculated charging current value;
    其中，当所述参考温度值处于预设的低温区间时，所述充电电流值随所述参考温度值的增大而增大，且小于预设的最大充电电流值；Wherein, when the reference temperature value is in a preset low temperature interval, the charging current value increases as the reference temperature value increases, and is less than a preset maximum charging current value;
    当所述参考温度值处于预设的高温区间时，所述充电电流值随所述参考温度值的增大而减少，且小于所述最大充电电流值；When the reference temperature value is in a preset high temperature interval, the charging current value decreases as the reference temperature value increases, and is smaller than the maximum charging current value;
    当所述参考温度值处于所述高温区间和低温区间之间的常温区间时，所述充电电流值为小于或等于所述最大充电电流值的定电流值。When the reference temperature value is in a normal temperature range between the high temperature interval and the low temperature interval, the charging current value is a constant current value that is less than or equal to the maximum charging current value.
  2. 根据权利要求1所述的方法，其中，所述根据采集到的温度值，确定一参考温度值的步骤包括：The method of claim 1 wherein said step of determining a reference temperature value based on the collected temperature value comprises:
    从采集到的温度值中，选择出最大温度值和最小温度值；From the collected temperature values, the maximum temperature value and the minimum temperature value are selected;
    在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值；When the minimum temperature value is in the low temperature interval, the minimum temperature value is taken as the reference temperature value;
    在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；When the maximum temperature value is in the high temperature interval, the maximum temperature value is taken as the reference temperature value;
    在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。When the minimum temperature value and the maximum temperature value are both in the normal temperature range, the maximum temperature value or the minimum temperature value is taken as the reference temperature value.
  3. 根据权利要求1所述的方法，其中，所述根据采集到的温度值，确定一参考温度值的步骤包括：The method of claim 1 wherein said step of determining a reference temperature value based on the collected temperature value comprises:
    去除采集到的温度值中的最大的第一温度值和最小的第二温度值；Removing a maximum first temperature value and a minimum second temperature value among the collected temperature values;
    在去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值和最大温度值；Determining a minimum temperature value and a maximum temperature value among the remaining temperature values after removing the first temperature value and the second temperature value;
    在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值； When the minimum temperature value is in the low temperature interval, the minimum temperature value is taken as the reference temperature value;
    在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；When the maximum temperature value is in the high temperature interval, the maximum temperature value is taken as the reference temperature value;
    在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。When the minimum temperature value and the maximum temperature value are both in the normal temperature range, the maximum temperature value or the minimum temperature value is taken as the reference temperature value.
  4. 根据权利要求1所述的方法，其中，所述根据采集到的温度值，确定一参考温度值的步骤包括：The method of claim 1 wherein said step of determining a reference temperature value based on the collected temperature value comprises:
    对采集到的温度值进行平均值计算，将计算得到的平均温度值作为所述参考温度值。The collected temperature values are averaged, and the calculated average temperature value is taken as the reference temperature value.
  5. 根据权利要求2至4任一项所述的方法，其中，所述根据所述参考温度值，计算充电电流值的步骤包括：The method according to any one of claims 2 to 4, wherein the step of calculating a charging current value based on the reference temperature value comprises:
    当所述参考温度值处于所述低温区间时，按照以下公式计算充电电流值I：When the reference temperature value is in the low temperature interval, the charging current value I is calculated according to the following formula:
    Figure PCTCN2017076489-appb-100001
    Figure PCTCN2017076489-appb-100001
    其中，Tref表示参考温度值，Tref∈(T0，T1]，(T0，T1]表示低温区间；T0，T1分别为所述低温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents a reference temperature value, T ref ∈(T 0 , T 1 ], (T 0 , T 1 ] represents a low temperature interval; T 0 , T 1 are respectively a lower limit and an upper limit of the low temperature interval , I max represents the maximum charging current value;
    当所述参考温度值处于所述高温区间时，按照以下公式计算充电电流值I：When the reference temperature value is in the high temperature interval, the charging current value I is calculated according to the following formula:
    Figure PCTCN2017076489-appb-100002
    Figure PCTCN2017076489-appb-100002
    其中，Tref表示参考温度值，Tref∈(T2，T3]，(T2，T3]表示高温区间；T2，T3分别为所述高温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents the reference temperature value, T ref ∈(T 2 , T 3 ], (T 2 , T 3 ] represents the high temperature interval; T 2 and T 3 are the lower and upper limits of the high temperature interval, respectively. , I max represents the maximum charging current value;
    当所述参考温度值处于所述常温区间时，充电电流值I为所述最大充电电流值。When the reference temperature value is in the normal temperature range, the charging current value I is the maximum charging current value.
  6. 一种磷酸铁锂电池的充电装置，包括：A charging device for a lithium iron phosphate battery, comprising:
    采集模块，设置为采集磷酸铁锂电池中各个电芯处的温度值； The acquisition module is configured to collect temperature values at respective cells in the lithium iron phosphate battery;
    确定模块，设置为根据采集模块采集到的温度值，确定一参考温度值；Determining a module, configured to determine a reference temperature value according to the temperature value collected by the acquisition module;
    处理模块，设置为根据确定模块确定的所述参考温度值，计算充电电流值，并根据计算得到的充电电流值，对所述磷酸铁锂电池进行充电；The processing module is configured to calculate a charging current value according to the reference temperature value determined by the determining module, and charge the lithium iron phosphate battery according to the calculated charging current value;
    其中，当所述参考温度值处于预设的低温区间时，所述充电电流值随所述参考温度值的增大而增大，且小于预设的最大充电电流值；Wherein, when the reference temperature value is in a preset low temperature interval, the charging current value increases as the reference temperature value increases, and is less than a preset maximum charging current value;
    当所述参考温度值处于预设的高温区间时，所述充电电流值随所述参考温度值的增大而减少，且小于所述最大充电电流值；When the reference temperature value is in a preset high temperature interval, the charging current value decreases as the reference temperature value increases, and is smaller than the maximum charging current value;
    当所述参考温度值处于所述高温区间和低温区间之间的常温区间时，所述充电电流值为小于或等于所述最大充电电流值的定电流值。When the reference temperature value is in a normal temperature range between the high temperature interval and the low temperature interval, the charging current value is a constant current value that is less than or equal to the maximum charging current value.
  7. 根据权利要求6所述的装置，其中，所述确定模块包括：The apparatus of claim 6 wherein said determining module comprises:
    选择单元，设置为从采集到的温度值中，选择出最大温度值和最小温度值；Selecting a unit, set to select a maximum temperature value and a minimum temperature value from the collected temperature values;
    第一确定单元，设置为在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值；a first determining unit, configured to use the minimum temperature value as the reference temperature value when the minimum temperature value is in the low temperature interval;
    第二确定单元，设置为在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值；a second determining unit, configured to use the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature interval;
    第三确定单元，设置为在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。The third determining unit is configured to set the maximum temperature value or the minimum temperature value as the reference temperature value when both the minimum temperature value and the maximum temperature value are in the normal temperature interval.
  8. 根据权利要求6所述的装置，其中，所述确定模块包括：The apparatus of claim 6 wherein said determining module comprises:
    筛选单元，设置为去除采集到的温度值中的最大的第一温度值和最小的第二温度值；a screening unit configured to remove a maximum first temperature value and a minimum second temperature value among the collected temperature values;
    第四确定单元，设置为在筛选单元去除第一温度值和第二温度值后的剩余温度值中，确定最小温度值和最大温度值；a fourth determining unit, configured to determine a minimum temperature value and a maximum temperature value among the remaining temperature values after the screening unit removes the first temperature value and the second temperature value;
    第五确定单元，设置为在所述最小温度值处于所述低温区间时，将所述最小温度值作为所述参考温度值；a fifth determining unit, configured to set the minimum temperature value as the reference temperature value when the minimum temperature value is in the low temperature interval;
    第六确定单元，设置为在所述最大温度值处于所述高温区间时，将所述最大温度值作为所述参考温度值； a sixth determining unit, configured to use the maximum temperature value as the reference temperature value when the maximum temperature value is in the high temperature interval;
    第七确定单元，设置为在所述最小温度值和最大温度值均处于所述常温区间时，将所述最大温度值或最小温度值作为所述参考温度值。And a seventh determining unit configured to set the maximum temperature value or the minimum temperature value as the reference temperature value when both the minimum temperature value and the maximum temperature value are in the normal temperature interval.
  9. 根据权利要求6所述的装置，其中，所述确定模块包括：The apparatus of claim 6 wherein said determining module comprises:
    第八确定单元，设置为对采集到的温度值进行平均值计算，将计算得到的平均温度值作为所述参考温度值。The eighth determining unit is configured to perform an average calculation on the collected temperature values, and use the calculated average temperature value as the reference temperature value.
  10. 根据权利要求7至9任一项所述的装置，其中，所述处理模块包括：The apparatus according to any one of claims 7 to 9, wherein the processing module comprises:
    第一计算单元，设置为当所述参考温度值处于所述低温区间时，按照以下公式计算充电电流值I：The first calculating unit is configured to calculate the charging current value I according to the following formula when the reference temperature value is in the low temperature interval:
    Figure PCTCN2017076489-appb-100003
    Figure PCTCN2017076489-appb-100003
    其中，Tref表示参考温度值，Tref∈(T0，T1]，(T0，T1]表示低温区间；T0，T1分别为所述低温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents a reference temperature value, T ref ∈(T 0 , T 1 ], (T 0 , T 1 ] represents a low temperature interval; T 0 , T 1 are respectively a lower limit and an upper limit of the low temperature interval , I max represents the maximum charging current value;
    第二计算单元，设置为当所述参考温度值处于所述高温区间时，按照以下公式计算充电电流值I：The second calculating unit is configured to calculate the charging current value I according to the following formula when the reference temperature value is in the high temperature interval:
    Figure PCTCN2017076489-appb-100004
    Figure PCTCN2017076489-appb-100004
    其中，Tref表示参考温度值，Tref∈(T2，T3]，(T2，T3]表示高温区间；T2，T3分别为所述高温区间的下限值和上限值，Imax表示所述最大充电电流值；Where T ref represents the reference temperature value, T ref ∈(T 2 , T 3 ], (T 2 , T 3 ] represents the high temperature interval; T 2 and T 3 are the lower and upper limits of the high temperature interval, respectively. , I max represents the maximum charging current value;
    第三计算单元，设置为当所述参考温度值处于所述常温区间时，将所述最大充电电流值作为充电电流值I。 The third calculating unit is configured to set the maximum charging current value as the charging current value I when the reference temperature value is in the normal temperature interval.
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