Identification of Fault Types in Lithium Ions Batteries Energy Storage Station Through Thermal Runaway Gas Generation

It is important to study the identification of fault types in lithium-ion battery energy storage station for energy storage safety. In grid-level energy storage, the fault types that trigger thermal runaway (TR) of lithium batteries mainly include thermal abuse and electrical abuse. This paper proposes a method to identify the fault types of lithium battery energy storage station based on thermal runaway gas generation. The process and gas generation mechanism of Li-ion battery thermal runaway is firstly briefly introduced. 50 Ah LiFePO4 battery is used as the research object to build a characteristic gas concentration experimental platform, and the Li-ion battery thermal runaway is triggered by overcharge and electric heating. Compared with the traditional battery management system, this method can effectively detect the fault types triggering thermal runaway of Li-ion batteries in the storage compartment, improving the fault detection efficiency.