When lithium-ion batteries (LIB) are used, stored or transported, if they are subjected to external overloads (overcharge or short circuit, vibration, impact, high and low temperature, etc.), the following phenomena may occur:
l Thermal runaway
l Electrolyte leakage
l Internal gas leakage caused by increased internal pressure
l Thermal decomposition reaction of electrolyte, etc. The
so-called thermal runaway refers to the phenomenon that the heat generated by lithium-ion batteries (LIB) during charging and discharging causes the internal temperature to rise, thereby causing the battery to lose control.
These problems are caused by the rapid heating of the electrolyte inside the lithium-ion battery (LIB) due to external forces such as high temperature and pressure , and may even cause major accidents such as fire and explosion. Fire caused by
overheating-smoking fire When a lithium-ion battery (LIB) is abnormal, the main components of the gas it produces, in addition to hydrogen (H2), carbon monoxide (CO), methane (CH4), carbon dioxide (CO2), there are also hydrocarbon VOC gases (EMC, DMC, ECD, etc.). These hydrocarbon VOC gases are generally considered to be organic solvents in LIB electrolytes or their thermal decomposition products. Under normal circumstances, the content of these gases in the air is very low except for CO2. Therefore, our customers can determine whether the battery is in thermal runaway by detecting the concentration changes of H2, CO, and CH4. If there is an abnormality, an alarm will be issued in time to remind people to evacuate and reduce losses. By installing the following gas sensors in the safety device of the LIB application equipment , various gases generated when the lithium-ion battery (LIB) is abnormal can be detected early even in places where it is difficult to monitor manually, and major accidents caused by LIB abnormalities can be prevented before they happen. Hydrogen (H2) sensor TGS2616
Carbon monoxide (CO) sensor TGS5141/TGS5042
VOC sensor TGS2620
Carbon dioxide sensor CDM7162-C00
Methane (CH4) sensor TGS2619/TGS2611
In the following applications, sensors such as hydrogen (H2), carbon monoxide (CO), VOC gas, methane (CH4) and carbon dioxide (CO2) can play a significant role in improving the safety of lithium-ion batteries.
