Meaning
International standards define the reliability and abuse requirements for secondary lithium ion cells used for the propulsion of electric road vehicles. Manufacturers perform iec 62660 testing to evaluate how individual cells respond to the mechanical and electrical stresses typical of an automotive environment. This series of tests is divided into parts that cover performance and safety requirements, ensuring that the hardware can withstand the life cycle of a car or truck.
Mechanical Stress
Vibration and shock evaluations simulate the conditions of driving on uneven surfaces over many years. A cell must remain structurally sound and maintain its electrical connections while being subjected to high frequency oscillations and sudden impacts. If the internal components shift or the casing cracks, the product fails the certification and cannot be integrated into a vehicle battery pack.
Thermal Performance
High temperature endurance tests check the stability of the cell chemistry when the cooling system of the vehicle is under heavy load. The laboratory monitors for signs of electrolyte leakage or casing deformation while the cell is kept at its upper operating limit for extended periods. This data allows engineers to design the thermal management system of the car with a clear understanding of the safety margins of the energy storage unit.
Application Scope
Different versions of the standard apply depending on whether the cell is intended for a full electric vehicle or a hybrid model. High power cells used in hybrids undergo more frequent cycling tests, while the energy dense cells in pure electric cars are measured for their long term storage capacity. The results of these tests are used by insurance companies and regulatory agencies to determine the road safety of new battery technologies before they reach the consumer market.
A successful test report provides the evidence needed to secure type approval in major global markets.
