Meaning
International standard that defines the test procedures for evaluating the reliability and abuse behavior of lithium-ion cells used for the propulsion of electric road vehicles governs the qualification of automotive batteries. This IEC 62660-2 standard provides a unified methodology for testing cells under conditions of vibration, temperature cycling, shock, and electrical abuse. Sourcing agents use compliance with this standard to verify that a supplier cell meets the safety and durability requirements of the automotive industry.
It applies to cells of various shapes, including cylindrical, prismatic, and pouch configurations. The standard focuses on the cell level rather than the complete battery pack.
Test Methods
Testing under this standard involves exposing the cells to a series of mechanical, thermal, and electrical stressors to observe their response. These tests include vibration, mechanical shock, high temperature endurance, and overcharge behavior. Sourcing specifications require that all candidate cells pass these rigorous tests without exhibiting hazardous events such as thermal runaway or explosion.
The resulting data helps engineers understand the safety margins of the cell design and the robustness of the internal materials.
Reliability Evaluation
Qualification of cells for automotive applications depends on their ability to withstand the harsh environment of a vehicle over many years. This standard helps in evaluating the effects of vibration and shock on the electrical connections and active materials inside the cell. Sourcing teams use this validation to minimize the risk of mechanical failure in the field.
This testing ensures that the mechanical structure of the cell can survive the lifetime of the vehicle without developing internal short circuits or other dangerous defects.
Safety Verification
Electrical and thermal abuse testing simulates extreme conditions that could occur in a vehicle, such as a cooling system failure or a charger malfunction. This standard requires that cells be subjected to high temperatures and overcharging to verify that they do not fail catastrophically. Sourcing contracts specify compliance with these requirements to protect the end-user and the reputation of the vehicle brand.
This verification is essential for obtaining regulatory approval for electric vehicles in global markets.
