WO2018054166A1 - 基于环境温度的电池循环寿命测试方法 - Google Patents

基于环境温度的电池循环寿命测试方法 Download PDF

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Publication number
WO2018054166A1
WO2018054166A1 PCT/CN2017/094900 CN2017094900W WO2018054166A1 WO 2018054166 A1 WO2018054166 A1 WO 2018054166A1 CN 2017094900 W CN2017094900 W CN 2017094900W WO 2018054166 A1 WO2018054166 A1 WO 2018054166A1
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temperature
test
battery
cycle life
battery cycle
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PCT/CN2017/094900
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English (en)
French (fr)
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袁圣杰
张琦
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蔚来汽车有限公司
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Publication of WO2018054166A1 publication Critical patent/WO2018054166A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • 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
    • 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]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • 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
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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

  • the invention belongs to the field of battery life testing, and in particular provides a battery cycle life testing method based on ambient temperature.
  • the cycle life test method of the power battery can be used to evaluate the service life of the battery, and the electric vehicle can be operated during the life cycle of the power battery according to the test result, the available power of the battery during the test, and the change of the output power of the battery during the test. Total mileage, as well as the power changes that can be provided.
  • battery cycle life is tested at a constant ambient temperature (eg, 25 ° C) and the battery is charged to the upper SOC limit of the battery at a constant current, and then discharged to the battery at a constant or dynamic current/power condition.
  • the lower limit of SOC The battery is cycle tested in this way until the available capacity/power of the battery reaches the set lifetime cut-off condition.
  • the temperature of the battery in actual use is constantly changing. This battery cycle life test method cannot accurately predict the actual life of the battery.
  • the present invention provides a battery cycle life test method based on ambient temperature, and the battery cycle life test method
  • the method comprises the following steps: counting the daily average temperature of each day in a specific region; classifying the calculated annual average daily temperature; determining the temperature condition of the battery cycle life test according to the annual average daily temperature of the classification; according to the battery cycle life test The temperature condition determines a current condition of the battery cycle life test; the battery is subjected to a cycle life test according to the temperature condition and the current condition and the test result is recorded.
  • the step of classifying the calculated annual average daily temperature further comprises: performing day counting according to the set temperature interval; and counting the proportion of each temperature interval .
  • the step of determining a temperature condition of the battery cycle life test further comprises: arranging the temperature intervals in a sequence from low temperature to high temperature; determining each temperature interval test temperature.
  • the step of determining the test temperature for each temperature interval further comprises: using an intermediate value of each temperature interval as the test temperature.
  • the step of determining a current condition of the battery cycle life test further comprises: determining a corresponding charge rate and a discharge rate of the battery cycle life test according to the test temperature.
  • the set temperature interval is 10 degrees Celsius.
  • the step of determining a corresponding charge rate and discharge rate of the battery cycle life test according to the test temperature is achieved according to the following conditions:
  • the test temperature is -25 ° C
  • the charge rate is 0.1 C
  • the discharge rate is 0.3 C
  • the test temperature is -15 ° C
  • the charge rate is 0.2 C
  • the discharge rate is 0.3 C
  • the test temperature is -5 ° C
  • the charging rate is 0.2 C
  • the discharge rate is 0.3 C
  • the test temperature is 5 ° C
  • the charge rate is 0.3 C
  • the discharge rate is 0.3 C
  • the test temperature is 15 ° C
  • the charge rate is 0.3 C
  • the discharge rate is 0.5 C
  • the test temperature is 25 ° C
  • the charge rate is 0.5 C
  • the discharge rate is 1 C
  • the test temperature is 35 ° C
  • the charge rate is 0.5 C
  • the discharge rate is 1 C
  • the test temperature is 45 ° C
  • the charging rate is 0.5 C.
  • the electric magnification is 0.5C.
  • the step of performing a cycle life test on the battery and recording the test result includes charging to the upper limit of the SOC of the battery each time, and discharging to the lower limit of the battery SOC each time.
  • the battery is a power battery of an electric vehicle.
  • the temperature interval is divided by counting the annual average daily temperature of a specific region; and then the time ratio of each temperature interval to the whole year is obtained according to the number of days in each temperature interval.
  • the temperature cycle condition of the battery cycle life test is obtained, and then the charge and discharge rate of the battery under the current temperature cycle condition is determined according to the temperature cycle condition; and then according to the time ratio of each interval and the temperature cycle
  • the battery cycle life test condition is obtained under the working condition and the current temperature cycle condition, and finally the cycle life test is performed on the battery according to the working condition.
  • the method of the invention can more realistically reflect the actual working condition of the battery, thereby more accurately predicting the actual use mileage when the vehicle is mounted, and has a positive effect on ensuring the development goal of the whole vehicle.
  • FIG. 1 is a flow chart of a battery cycle life test method of the present invention
  • Figure 4 is the Shanghai annual temperature statistics table for 2015
  • Figure 5 shows the number of days in each temperature interval in Shanghai in 2015 and the proportion of time in the year
  • Figure 6 is a temperature cycle condition table of the battery cycle life test method of the present invention.
  • Fig. 7 is a cycle life condition table of the battery cycle life test method of the present invention.
  • the implementation steps of the ambient temperature-based battery cycle life test method of the present invention include:
  • Step S100 Perform statistics on the daily average temperature of each day of the year. Since there is a certain difference in the temperature of each region, it is necessary to separately calculate the daily average temperature of each region.
  • the region here can be understood as the regional sum of the daily average temperature difference (for example, the daily average temperature difference is not more than 2 °C). .
  • the annual average daily temperature is calculated. In order to ensure the accuracy of the annual average daily temperature in each region, it can only be in recent years in each region (for example, one year, three years or five).
  • the historical average daily temperature of the year, etc. is used as a reference.
  • Step S200 Dividing the temperature interval according to the calculated annual average daily temperature, and calculating the proportion of the time of each temperature interval. As shown in FIG. 2, as an example, the number of days can be counted in a temperature range of 10 ° C to determine the proportion of time in each temperature interval. Those skilled in the art will appreciate that the range of temperature intervals is not limited to 10 ° C, and the range of temperature intervals may be reduced or increased depending on different regions or required test accuracy.
  • Step S300 As shown in FIG. 2, the temperature interval counted and divided in step S200 is sequentially arranged from low temperature to high temperature, and the intermediate value of each temperature interval is taken as the test temperature, that is, the temperature condition of the battery cycle life test is determined. . It can be understood by those skilled in the art that taking the intermediate value of each temperature interval as the test temperature is merely exemplary, and it is also possible to compare some of the temperatures in which the daily average temperature is concentrated in each interval or most of the daily average temperatures. A temperature is used as the test temperature of the battery to improve the accuracy of the test results.
  • Step S400 Determine the charge and discharge rate condition of the battery according to the temperature condition determined in step S300, that is, the charge and discharge current of the battery.
  • the temperature condition determined in step S300 that is, the charge and discharge current of the battery.
  • Step S500 further obtaining the charge and discharge conditions of the battery cycle test according to the time ratio of the temperature range occupied by each temperature interval in step S200, the temperature condition determined in step S300, and the charge and discharge rate operation determined in step S400, and according to The working condition is to follow the battery
  • the ring life test is performed and the results of each test are recorded to predict the actual life of the battery.
  • Figure 4 shows the annual average daily temperature table of Shanghai in 2015. It can be seen from the table that the temperature fluctuations in the first half of the year are large, but the daily average temperature changes in the adjacent time are mostly Both are in the range of 10 °C, so the annual average temperature of Shanghai in 2015 is divided into a temperature range of 10 °C. As shown in FIG.
  • temperature interval 0 ⁇ T ⁇ 10 accounts for about 10% of the whole year
  • the temperature interval 10 ⁇ T ⁇ 20 accounts for about 32% of the whole year
  • the temperature interval 20 ⁇ T ⁇ 30 accounts for about 43% of the whole year.
  • the temperature interval 30 ⁇ T ⁇ 40 accounted for about 16% of the time of the year, and the ratio of the other temperature intervals to the whole year was 0.
  • the charge and discharge rate of the battery is determined according to the temperature of the battery cycle life test in FIG. Then, according to the obtained time ratio, temperature condition, and charge and discharge rate, the battery is charged and discharged in the order of steps in FIG. It should be noted that the test time continued for each step in steps 1 to 10.
  • a plurality of temperature points can be set in each temperature interval.
  • the test temperature of the current temperature interval can be at these temperatures. Any change between points, the law of change can be determined according to local weather changes, in order to improve the accuracy of the battery cycle life test results.
  • the battery is charged to the upper limit of the SOC of the battery system each time during the cycle life test of the battery, and is discharged to the lower limit of the SOC each time.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种基于环境温度的电池循环寿命测试方法，属于电池寿命测试领域。测试方法通过统计特定地区全年的历史日均温度（S100）并据此划分温度区间；然后根据各温度区间内的天数获得各温度区间占全年的时间比例（S200）；同时根据各温度区间获得电池循环寿命测试的温度循环工况（S300），进而根据温度循环工况确定电池在当前温度循环工况下的充放电倍率（S400）；最后根据占全年的时间比例、温度循环工况和在当前温度循环工况的充放电倍率对电池进行测试，获得电池的循环寿命（S500）。该测试方法能够更准确地反映电池的实际使用温度，以便更准确地评估电池的实际使用寿命。

Description

基于环境温度的电池循环寿命测试方法 技术领域
本发明属于电池寿命测试领域，具体提供一种基于环境温度的电池循环寿命测试方法。
背景技术
动力电池的循环寿命测试方法可以用来评估电池的使用寿命，根据测试结果、测试过程中电池的可用电量以及测试过程中电池的输出功率变化，来评估在动力电池寿命周期内电动汽车可以运行的总里程，以及能提供的功率变化。
通常电池循环寿命的测试是在恒定环境温度(例如25℃)条件下进行的，并且以恒定电流对电池充电至电池的SOC上限，然后再以恒定或者动态的电流/功率工况对电池放电至SOC下限。以此方法对电池循环测试，直至电池的可用容量/功率达到设定的寿命截止条件为止。但是，电池实际使用中的温度是不断变化的，这种电池循环寿命测试方法不能准确地预估电池的实际使用寿命。
相应地，本领域需要一种新的电池循环寿命测试方法来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决现有技术不能正确地预估电池实际使用寿命的问题，本发明提供了一种基于环境温度的电池循环寿命测试方法，该电池循环寿命测试方法包括以下步骤：统计特定地区全年内每一天的日均温度；对统计出的全年日均温度进行分类；根据分类的全年日均温度确定电池循环寿命测试的温度条件；根据电池循环寿命测试的温度条件确定电池循环寿命测试的电流条件；根据所述温度条件和所述电流条件对电池进行循环寿命测试并记录测试结果。
在上述电池循环寿命测试方法的优选技术方案中，所述对统计出的全年日均温度进行分类的步骤进一步包括：按照设定的温度区间进行天数统计；统计每个温度区间所占的比例。
在上述电池循环寿命测试方法的优选技术方案中，其特征在于，所述确定电池循环寿命测试的温度条件的步骤进一步包括：按照低温到高温的顺序排列所述温度区间；确定每个温度区间的测试温度。
在上述电池循环寿命测试方法的优选技术方案中，所述确定每个温度区间的测试温度的步骤进一步包括：将每个温度区间的中间值作为所述测试温度。
在上述电池循环寿命测试方法的优选技术方案中，所述确定电池循环寿命测试的电流条件的步骤进一步包括：根据所述测试温度确定电池循环寿命测试的相应的充电倍率和放电倍率。
在上述电池循环寿命测试方法的优选技术方案中，所述设定的温度区间是10摄氏度。
在上述电池循环寿命测试方法的优选技术方案中，所述根据测试温度确定电池循环寿命测试的相应的充电倍率和放电倍率的步骤根据下列条件实现：
当温度区间是-30≤T＜-20时，测试温度为-25℃，充电倍率是0.1C，放电倍率是0.3C；
当温度区间是-20≤T＜-10时，测试温度为-15℃，充电倍率是0.2C，放电倍率是0.3C；
当温度区间是-10≤T＜0时，测试温度为-5℃，充电倍率是0.2C，放电倍率是0.3C；
当温度区间是0≤T＜10时，测试温度为5℃，充电倍率是0.3C，放电倍率是0.3C；
当温度区间是10≤T＜20时，测试温度为15℃，充电倍率是0.3C，放电倍率是0.5C；
当温度区间是20≤T＜30时，测试温度为25℃，充电倍率是0.5C，放电倍率是1C；
当温度区间是30≤T＜40时，测试温度为35℃，充电倍率是0.5C，放电倍率是1C；
当温度区间是40≤T＜50时，测试温度为45℃，充电倍率是0.5C，放 电倍率是0.5C。
在上述电池循环寿命测试方法的优选技术方案中，所述对电池进行循环寿命测试并记录测试结果的步骤包括：每次都充电至电池的SOC上限，并且每次都放电至电池SOC下限。
在上述电池循环寿命测试方法的优选技术方案中，所述电池是电动汽车的动力电池。
本领域技术人员能够理解的是，在本发明的优选技术方案中，通过统计特定地区全年日均温度进而划分温度区间；然后根据各温度区间内的天数获得各温度区间占全年的时间比例；同时根据各温度区间获得电池循环寿命测试的温度循环工况，进而根据温度循环工况确定电池在当前温度循环工况下的充放电倍率；进而根据各区间占全年的时间比例、温度循环工况和当前温度循环工况下的充放电倍率获得电池循环寿命测试工况，最后根据所述工况对电池进行循环寿命测试。本发明的方法能够更真实地反映电池的实际使用工况，从而更准确地预测整车搭载时的实际使用里程，对保证整车开发目标有积极的作用。
附图说明
图1是本发明的电池循环寿命测试方法的流程图；
图2是本发明的电池循环寿命测试方法的测试温度表格；
图3是本发明的电池循环寿命测试方法的测试电流表格；
图4是上海市2015年全年温度统计表格；
图5是上海市2015年各温度区间的天数和所占全年的时间比例；
图6是本发明的电池循环寿命测试方法的温度循环工况表；
图7是本发明的电池循环寿命测试方法的循环寿命工况表。
具体实施方式
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。例如，虽然本发明的说明书是以上海地区2015年的全年气温进行详细描述说明的，但是很明显，本发明的基于环 境温度的电池循环寿命测试方法可以适用于任何地区，本领域技术人员可以根据需要对其作出调整，以便适应具体的应用场合。
如图1所示，本发明的基于环境温度的电池循环寿命测试方法的实施步骤包括：
步骤S100：对全年每一天的日均温度进行统计。由于各地区的温度存在一定的差异性，因此需要对各地区分别进行日均温度的独立统计，这里的地区可以理解为日均温差较小(例如，日均温差不大于2℃)的地域总和。然后，根据各地区的历史日均温度统计出全年日均温度，为了保证各地区的全年日均温度的准确性，可仅以各地区最近几年(例如，一年、三年或五年等)的历史日均温度作为参考。
步骤S200：根据统计出的全年日均温度划分温度区间，并计算出各温度区间所占全年的时间比例。如图2所示，作为示例，可以按10℃一个温度区间进行天数统计，进而确定各温度区间所占全年的时间比例。本领域技术人员能够理解的是，温度区间的范围不仅限于10℃，可根据不同地区或者所要求的测试精度不同，将温度区间的范围减小或增大。
步骤S300：如图2所示，将步骤S200统计并划分的温度区间按由低温到高温的顺序依次排列，并且取各温度区间的中间值作为测试温度，即，确定电池循环寿命测试的温度条件。本领域技术人员能够理解的是，取各温度区间的中间值作为测试温度仅仅是示例性的，还可将各区间内日均温度较集中的某一温度或者大多数日均温度比较靠近的某一温度作为电池的测试温度，以此来提高测试结果的准确性。
步骤S400：根据步骤S300中确定的温度条件确定电池的充放电倍率工况，即电池的充放电电流大小。本领域技术人员能够理解的是，电池在低温环境下充电时，由于内阻升高，电流过大会造成锂的析出；电池在高温环境下工作时，电池内部的热量不易散出，容易造成电池温度过高；并且考虑到电动汽车电池的放电功率，所以在不同的测试温度下，需要选择不同的测试电流对电池进行充电和放电。作为示例，图3示出了各测试温度(或温度区间)下电池的充放电倍率。
步骤S500：根据步骤S200中各温度区间所占全年的时间比例、步骤S300中确定的温度条件和步骤S400中确定的充放电倍率工况，进一步得到电池循环测试的充放电工况，并根据所述工况对电池进行循 环寿命测试，并将每次测试的结果进行记录，进而预测电池的实际使用寿命。
下面以上海市2015年的全年气温为例对电动汽车的动力电池进行循环寿命测试，具体实施步骤如下。
如图4和图5所示，图4为上海市2015年的全年日均温度表，从表中可以看出，前半年的温度波动较大，但是相邻时间内的日均温度变化大多都在10℃的范围内，所以将上海市2015年的全年日均温度按10℃一个温度区间进行划分。如图5所示，将各温度区间的天数进行统计，并将统计出的各温度区间内的天数除以全年的总天数，进而计算出每个温度区间占全年的时间比例：温度区间0≤T＜10占全年的时间比例约为10％，温度区间10≤T＜20占全年的时间比例约为32％，温度区间20≤T＜30占全年的时间比例约为43％，温度区间30≤T＜40占全年的时间比例约为16％，其他温度区间所占全年的时间比例为均为0。
如图6所示，取每个温度区间的中间值作为电池测试的温度，即，温度区间0≤T＜10取5℃作为测试温度，温度区间10≤T＜20取15℃作为测试温度，温度区间20≤T＜30取25℃作为测试温度，温度区间30≤T＜40取35℃作为测试温度。将2015年的全年的时间分成10份，则按2015年全年的时间比例计算，电池测试的温度：5℃占1份，15℃占3份，25℃占4份，35℃占2份。进一步，按照从低温到高温的顺序排列，得到电池循环寿命测试的温度条件以及电池在各温度工况下测试的时间比例。
如图7所示，根据图6中电池循环寿命测试的温度确定电池的充放电倍率。然后根据得出的时间比例、温度条件和充放电倍率按照图7中的步骤顺序对电池充电与放电。需要说明的是，步骤1到10中每一步所持续的测试时间都相同。
本领域技术人员能够理解的是，除了将每个温度区间的测试温度取中间值外，还可以在每个温度区间内设置多个温度点，测试时，当前温度区间的测试温度可在这些温度点之间任意变换，变化规律可根据当地的天气变化确定，以此来提高电池循环寿命测试结果的准确性。
本领域的技术人员还能够理解的是，在对电池进行循环寿命测试时，电池每次都充电至电池系统的SOC上限，并且每次都放电至SOC下限。
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。

Claims (9)

  1. 一种基于环境温度的电池循环寿命测试方法，其特征在于，所述方法包括下列步骤：
    统计特定地区全年内每一天的日均温度；
    对统计出的全年日均温度进行分类；
    根据分类的全年日均温度确定电池循环寿命测试的温度条件；
    根据电池循环寿命测试的温度条件确定电池循环寿命测试的电流条件；
    根据所述温度条件和所述电流条件对电池进行循环寿命测试并记录测试结果。
  2. 根据权利要求1所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述对统计出的全年日均温度进行分类的步骤进一步包括：
    按照设定的温度区间进行天数统计；
    统计每个温度区间所占的比例。
  3. 根据权利要求2所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述确定电池循环寿命测试的温度条件的步骤进一步包括：
    按照低温到高温的顺序排列所述温度区间；
    确定每个温度区间的测试温度。
  4. 根据权利要求3所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述确定每个温度区间的测试温度的步骤进一步包括：将每个温度区间的中间值作为所述测试温度。
  5. 根据权利要求4所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述确定电池循环寿命测试的电流条件的步骤进一步包括：根据所述测试温度确定电池循环寿命测试的相应的充电倍率和放电倍率。
  6. 根据权利要求5所述的基于环境温度的电池循环寿命测试方法， 其特征在于，所述设定的温度区间是10摄氏度。
  7. 根据权利要求6所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述根据测试温度确定电池循环寿命测试的相应的充电倍率和放电倍率的步骤根据下列条件实现：
    当温度区间是-30≤T＜-20时，测试温度为-25℃，充电倍率是0.1C，放电倍率是0.3C；
    当温度区间是-20≤T＜-10时，测试温度为-15℃，充电倍率是0.2C，放电倍率是0.3C；
    当温度区间是-10≤T＜0时，测试温度为-5℃，充电倍率是0.2C，放电倍率是0.3C；
    当温度区间是0≤T＜10时，测试温度为5℃，充电倍率是0.3C，放电倍率是0.3C；
    当温度区间是10≤T＜20时，测试温度为15℃，充电倍率是0.3C，放电倍率是0.5C；
    当温度区间是20≤T＜30时，测试温度为25℃，充电倍率是0.5C，放电倍率是1C；
    当温度区间是30≤T＜40时，测试温度为35℃，充电倍率是0.5C，放电倍率是1C；
    当温度区间是40≤T＜50时，测试温度为45℃，充电倍率是0.5C，放电倍率是0.5C。
  8. 根据权利要求1至7中任一项所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述对电池进行循环寿命测试并记录测试结果的步骤包括：每次都充电至电池的SOC上限，并且每次都放电至电池SOC下限。
  9. 根据权利要求8所述的基于环境温度的电池循环寿命测试方法，其特征在于，所述电池是电动汽车的动力电池。
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