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1、Roundtable 2: Battery Test ProceduresRoundtable 2: Battery Test ProceduresOutcomeOutcomeCoLeaders:Co Leaders: Jeff Chamberlain, Argonne National Laboratory QIU Xingping, Tsinghua UnivesityRoundtable 2 Vehicle Survey ResultsChina, as forecast by the ChineseUS, as forecast by the Americans,y,yOutcome
2、- OverviewThis roundtable represents the first step in the international collaboration in the hope of agreeing on a set of international testing protocols. Currently, each group uses somewhat different test protocols to characterize performance and predict life and to demonstrate abuse tolerance for
3、 batteries in HEV，PHEV and EV applications. Each approach has intrinsic assumptions. Based on theseEV applications. Each approach has intrinsic assumptions. Based on these assumptions, the resulting test procedures from one approach may stress the battery more than those from the others. Clearly, a
4、careful comparison of these procedures is needed to determine the similarities and differences between hSilkbd ddihidfthem. Some experimental work may be needed to determine the magnitude of the differences which may be present in the test results. 这个圆桌会议是国际合作的第一步希望规范国际测试方法。 现在， 不同的 研究小组采用各自不同的测试方法来
5、表征和预测HEVPHEV和EV电池的性能研究小组采用各自不同的测试方法来表征和预测HEV，PHEV和EV电池的性能 ， 如寿命和滥用性等。每个测试方法基于各自特有的假设。这将导致不同 的测试方法对电池有相当不同的影响。很显然， 不同方法之间小心的比较 是必须的来决定不同方法间的异同。这需要一些实验工作来决定多大程度 上实验方法对实验结果的影响上实验方法对实验结果的影响。Bottom lineresultWe did not identify testing protocols and methodologies that both the U.S. and China are willing
6、to agree on today. We DID identify serious and various differences between our two testing programs. Wlidtifi dth fd t b ttdtd th d t ilf thWe also identified a path forward to better understand the details of the differences, and how we might bridge the gaps.ResultsDifferences between the U.S. and
7、Chinese approach to battery testing for HEV, PHEV, and BEV have been identified and discussed. Differences span from implicit assumptions testing protocols objectives of the testsobjectives of the tests philosophy of testing even the measurements themselves Example: There were differences in objecti
8、ves. The objective in the US is to demonstrate pjj the potential for the application. The objective in China is to demonstrate actual performance and life in a given application.It was also identified that new methods may need to be developedIt was also identified that new methods may need to be dev
9、eloped. Example: Fast cycle test, in development in China. Extremely accelerated testing very high temperature and very short cycles.Examples from Testing (1)Cell Characterization China: 单体cell20?放电容量(20? Discharge Test )、功率测试(Power Test )、 50?100?放电容量(50?100? Discharge Test)、充放电特性测试(Charge / Discha
10、rge Characteristics Test )、常温/高温荷电保持能力(Selfdischarge Test)、Discharge Characteristics Test )、常温/高温荷电保持能力(Self discharge Test)、 大电流放电试验(High Current Discharge Test )、常规循环寿命试验(Cycle life Test)、模拟工况循环寿命试验(Condition Cycle life Test)、安全试验Safety Testing （包括针刺Acupuncture 、挤压Extrusion 、短路Short 、过充 Oh跌落D高温hi
11、h）等Overcharge 、跌落Drop 、高温high temperature ）等US: Batteries are characterized in terms of constantcurrent capacity, selfdischarge, py,g , hybrid pulsepower capability (HPPC), cold cranking (5 kW at 30oC), thermal performance and energy efficiency at 30oCExample From Testing (2)Life Test in China 循寿命 循
12、环寿命Cycle life 55oC搁置寿命Hightemperature battery life on hold 55oC加速循环寿命（ Hightemperature Fast cycle life (still in research stage)）60000Discharge60000Discharge Life Test in US (PHEV) Chargedepleting cycling at 30oC Chargesustaining at 30oC1000020000300004000050000ge Power, Wg1000020000300004000050000g
13、e Power, Wg Periodic reference tests to quantify change-30000-20000-10000010000Peak Discharg-30000-20000-10000010000Peak Discharg-40000 050100150200250300350Time in Profile, sCharge -40000 050100150200250300350Time in Profile, sChargeExample from Testing (3) Safety and AbuseChina 过充电保护-Overcharge pr
14、otection 过放电保护-Overdischarge protection 短路保护-ShortCircuit Protection USUS Overcharge/over discharge Short circuit CrushCrush Nail PenetrationProposed Next StepsObjective: To understand and bridge the differences between U.S. and China with respect to the current battery testing methodology and proce
15、dures, and then to identify and develop new methods and measurement techniques for vehicular batteries Method: Perform a collaborative experiment in which both the U S and ChineseMethod: Perform a collaborative experiment in which both the U.S. and Chinese counterparts test identical batteries and/o
16、r cells, and publish the results collaboratively. There are 3 parts to the experiment. The coordinators for this experiment are Chamberlain (ANL) and Qiu (Tsinghua University) 1. Performance and life testing 2. Abuse and safety testing 3Mhid M d l3. Mechanisms and ModelsExpected Results from CollaborationHave a basis of discussion of methodology, philosophy, and, ultimately, procedures
