Measures for large-scale rapid charging and discharging of lithium secondary batteries, as well as countermeasures for heat generation, degradation, rupture, and ignition.
20129
The increasing size of lithium secondary batteries leads to greater challenges in rapid charging and discharging, along with associated lifespan and malfunction issues! This point will be comprehensively covered from the basics.
Part 1: Watanabe Haruo, Director of Watanabe Haruo Engineering Consultant Office, Doctor of Engineering (Employed at Sony Corporation until March 2010) Part 2: Yoshiyasu Saito, Energy Interface Technology Group, Second Energy Technology Research Division, National Institute of Advanced Industrial Science and Technology Part 3: Shuichi Sugawara, Representative, Izumi Chemical Research Co., Ltd. Target Audience: Researchers and personnel interested in lithium secondary batteries (for mobile use, automotive, and storage battery applications) Venue: Kawasaki City Educational and Cultural Center, 4th Floor, Room 1 [Kanagawa, Kawasaki] Access: 10-15 minutes on foot from JR Kawasaki Station or Keikyu Line Kawasaki Station Date and Time: January 31, 2012 (Tuesday) 11:00 AM - 4:00 PM Capacity: 20 people. *Please apply early as there may be a rush of applications. Participation Fee: [Early Bird Discount Price] 51,450 yen (tax included, including text costs) for up to 2 people from one company. *Limited to Tech-Zone members who apply by January 17. Membership registration is free. *After January 17, the [Regular Price] will be 54,600 yen (tax included, including text costs) for up to 2 people from one company.
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basic information
**Lecture 1: Summary of the Presentation** The energy loss during charging and discharging is small, there is little capacity degradation with repeated charging and discharging, and there is no memory effect, among many other features. While leveraging these characteristics, the heat generation and its countermeasures implemented to ensure safety and durability are extremely important issues. This topic will be explained from the perspective of battery structure and materials. **Lecture 3: Summary of the Presentation** The safety of automotive batteries, such as those used in electric vehicles (EVs), is a significant challenge in their development. Although these batteries achieve high discharge voltages through the use of organic electrolytes, the flammability of the electrolyte and the associated risks present issues that were not present in conventional secondary batteries. While information is limited, examining a few cases of large battery fires reveals aspects that make it difficult to attribute the incidents solely to the combustion of leaked electrolyte. This is related to the fact that lithium-ion batteries (cells) can generate flammable gases containing hydrogen under conditions of overcharging, over-discharging, or unexpected situations. In this seminar, I would like to analyze fire incidents and explain the fundamental electrochemical safety of lithium-ion cells, including active materials and electrolytes, in relation to safety testing standards (such as UL, UN, etc.) and the rigorous tests (Abuse Test) conducted in Europe and the United States.
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P2
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Applications/Examples of results
Part 1: Heat Generation and Countermeasures of Lithium-Ion Secondary Batteries - Countermeasures in Battery Composition Part 2: Analysis and Evaluation of Changes in Thermal Stability of Electrodes Due to Degradation of Lithium-Ion Batteries 2. Battery Lifespan Evaluation Tests 3. Degradation Analysis of Lithium-Ion Batteries 4. Analysis of Changes in Thermal Stability of Cathodes Due to Degradation 5. Charging and Discharging Behavior and Heat Generation of Lithium-Ion Batteries 5-1. Heat Generation Mechanism During Charging and Discharging 5-2. Evaluation of Battery Heat Generation Behavior Through Thermal Measurement 5-3. Charge/Discharge Rate and Heat Generation Amount Part 3: Hazards from Gas Generation During Overcharging of Lithium-Ion Batteries for Automobiles and Prevention of Fire and Explosion 1. Electrochemical Fundamentals and Safety of Lithium-Ion Batteries (Cells) 2. Characteristics and Case Studies of Medium and Large Lithium-Ion Batteries (Cells) 3. Overcharging and Overdischarging of Cells and Associated Phenomena 3-1. Charging End Voltage, Discharge Cut-off Voltage, Series Overcharging, Parallel Overcharging 3-2. Reactions of Charging (Oxidation), Discharging (Reduction), and Electrolyte (Quality) 3-3. Composition of Decomposition Gases and Amount of Generated Gases 4. Safety Tests and Harsh Testing 4-2. JIS, UL, UN, China QCT/743, etc. 4-3. USABC Abuse 4-4. EUCAR Hazard Levels 5. Understanding, Considerations, and Countermeasures for Fire Incidents
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