摘要(英) |
This research using lithium-ion battery to do nail test. After the metal needle nailed into battery. Battery inside have made a very large current inside, and when this current go through the metal needle. Needle’s inside resistance and short circuit current will make metal some heat. The heat will make lithium-ion battery’s temperature grow up. Finally, the battery will make smoke and cause fire.
During the research, we use S45C steel and SUS316 steel to made needle, and using different speed to do the test. We see the test result, we find the needle made by S45C cause battery’s temperature grow slowly than using needle by SUS316. As that we know, if we can control needle’s internal resistance lower, we can decrease the effects of needle.
Using the result, we find method to increase battery’s safety. We get three method to increase battery’s safety : 1. Add some additive to decrease oxygen’s growth. 2. Increase seperator’s thickness or length. 3. Increase electrolyte’s flash point.
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