I wondering Mechanism of firing LiB cell in the oven at 130°C.
Usually, There is "heat exposure test" in the battery international certification process to insure safty of cell.
How to do heat exposure test :
1. Prepare the cell that is SOC 100
2. Put the cell in the oven.
3. Raise the temperture of oven to 5°C for min. After it reach to 130°C, stay the condition for 1 hour.
Sometime, the cell is fired during the test.
So, I wondering what trigger(cause) the firing and mechanism.
If you have any kind of good reference, please send me.
Hello Kim Hyemi
You may find the following reference useful as regards identifying thermally induced cell failure mechanisms.
JRC Exploratory Research Workshop –Safer Li-Ion Batteries by Preventing Thermal Propagation? M. Börner, A. Friesen, F. Schappacher, M. Winter – 08./09.03.2018 – Petten
You can locate the (pdf) document online as: factors-thermal-stability-of-lithium-ion-batteries.pdf
Please take great care if carrying out thermal testing, the equipment should be remote from the operator and in a place equipped to deal with both 'venting with flame' and cell explosion/detonation. I have used an external 'bunker' with remote activation and recording (in lab) for this type of work. The risk of catastrophic failure of cells is greatest in (as yet) non-commercial cells under development, most especially in circumstances where Lithium dendrite formation could occur.
Regards
Al Holmes
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