An area of growing focus is the materials and packaging
solutions for ESS used in electromobility. Even though
packaging represents a small fraction of the cost of any ESS,
it is an essential component that enables functionality, safe
operation and the ability to capture value over the product
lifecycle. The use of durable flame-retardant polycarbonates
for packaging components and the adoption of modular
designs capture value, allow multiple applications, and
facilitate second life use.
Modularity and the battery life cycle
ESS are moving toward modularity as part of the natural
development cycle of EV and stationary ESS. Battery
modules with standard interfaces may be used as building
blocks to satisfy the power and energy requirements of
different types of EVs.
Currently, ESS for electric passenger vehicles tend to be
over-engineered and may be able to retain 70 percent of
their capacity at the end of their vehicular life. Applications
for repurposing former EV ESS modules include renewable
energy storage, power-peak shaving, energy buffers for rapid
EV charging, and emergency back-up systems.
Repurposing modules improve the economics of EVs,
facilitate upgrades, and create new sources of revenue
along the value chain. Modularity will not only enable a
new class of electric products and applications; it will also
reduce refurbishing costs, enable new business models, and
facilitate safe end-of-life disposal and recycling.
Safety and compliance
Packaging plays a critical role in helping to ensure the safe
and reliable operation of ESS. Various global and national
standard development organizations are working together
to create standards, codes, and regulations that enable safe
use of ESS.
Compliance helps to ensure that the ESS satisfies
Electromobility is emerging as a global alternative to transportation based on the internal combustion engine.
Battery technology is largely responsible for
the recent success of electric vehicles (EVs)
from bicycles to passenger cars and buses. A
sustained drop in lithium-ion battery costs
and performance improvements are also
fueling innovation in electromobility. At the
same time, these changes are pushing the
limits of design, and designers are looking
for ways to maximize the value of lithium-ion
energy storage systems (ESS).
By Ignacio G. Osio, Ph.D.
Key Growth Programs Manager, Covestro LLC
Solutions to Drive
Electromobility Figure 1. Design concept: LEV ESS.