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U.S. DOE FreedomCAR and Vehicle Technologies Advanced Technology Development Program for Lithium-Ion Batteries

Ira D. BloomGanesan NagasubramanianJon P. ChristophersenTien Q. DuongChet MotlochVince Battaglia

其他書名	Gen 2 Performance Evaluation Interim Report
出版	Idaho National Laboratory, 2003
URL	http://books.google.com.hk/books?id=eYzLjwEACAAJ&hl=&source=gbs_api

註釋The Advanced Technology Development Program is currently evaluating theperformance of the second generation of Lithium-ion cells (i.e., Gen 2 cells). The18650-size Gen 2 cells consist of a baseline chemistry and one variant chemistry. These cells were distributed over a matrix consisting of three states-of-charge (SOC)(60, 80, and 100% SOC), four temperatures (25, 35, 45, and 55°C), and three life tests(calendar-, cycle-, and accelerated-life). The calendar-life cells are clamped at an opencircuitvoltage corresponding to 60% SOC and undergo a once-per-day pulse profile. The cycle-life cells are continuously pulsed using a profile that is centered around 60%SOC. The accelerated-life cells are following the calendar-life test procedures, butusing the cycle-life pulse profile. Life testing is interrupted every four weeks forreference performance tests (RPTs), which are used to quantify changes in capacity, resistance, and power. The RPTs consist of a C1/1 and C1/25 static capacity tests, alow-current hybrid pulse power characterization test, and electrochemical impedancespectroscopy at 60% SOC. Capacity-, power-, and electrochemical impedancespectroscopy-based performance results are reported.