The Current Interrupt Device CID activation pressure is important to understand as this will be the internal cell pressure at which the electrical connection will be opened. Hence the cell will then be electrically disconnected from the external circuit.
The pressure increase inside the cell is due to gas formation caused by decomposition reactions which in itself is due to abuse conditions such as over-charge, over-discharge or internal shorting of the cell.
| Cell | CID activation pressure [MPA @22°C] | CID activation pressure [MPA @100°C] |
|---|---|---|
| MTI 18650 | 1.058 ± 0.053 | 0.920 ± 0.076 |
| LG MJ1 | 1.293 ± 0.119 | 1.066 ± 0.068 |
| K2 18650E | 0.997 ± 0.292 | 0.834 ± 0.057 |
| LG M36 | 1.393 ± 0.113 | 1.083 ± 0.077 |
This post has been built based on the support of and sponsorship from: Quarto Technical Services, Eatron Technologies and About:Energy
References
- Weisi Li, K.R. Crompton, Jason K. Ostanek, Comparison of current interrupt device and vent design for 18650 format lithium-ion battery caps: New findings, Journal of Energy Storage, Volume 46, 2022
- Jaesik Chung, Eric C. Darcy, Gunho Kwak, Investigate the Relationship between Cell Safety Devices’ Activation Pressure and LIB Cell Safety with a Cell Failure Mechanism, 2021 NASA Aerospace Battery Workshop, Nov. 16 ~ 18, 2021