The standard multi-cell battery has had a critical makeover: No longer
will the battery fail if a cell fails.
CEA’s Sigma Cells battery can power products ranging from laptops to
electric vehicles and is the world’s first three-in-one battery solution
with integrated inverter, charging and battery-management functions.
This revolutionary technology serves as the battery’s brain, governing
the smart use of battery cells. If a cell is about to fail, Sigma Cells
finds an alternative pathway, activating the “best” cells and, in the
process, preventing downtime.
The innovative battery-management system (BMS) architecture and
operating mode deliver the inverter and charging functions by default.
In addition to freeing up space in the vehicle, the position of the
batteries is flexible. Because the system operates with traditional grid
voltage, any standard electrical outlet in any region of the world can
be used for charging.
The CEA team revisited traditional battery architectures to create a
multi-cell power supply, and deliver enhanced performance by all three
main functions: switching, charging and battery management. The
integrated charger and bidirectional system enable fast charging
directly off the grid at no additional cost. The battery lifespan is
increased by 15 percent.
“Electric-powered transportation is booming, but the industry must solve
several battery-management challenges,” said Philippe Despesse, senior
engineer at CEA-Leti. “Currently, if one cell in a battery pack fails,
it generates a fault on the whole pack. At best, this puts the battery
pack out of service until it can be repaired. At worst, the battery is
discarded. CEAswitched-cell technology will revolutionize batteries by
lengthening their lifespans and reducing weight and size.”
In addition to powering small electronic devices, Sigma Cells
smart-battery technology meets the requirements of rapidly growing
electric-mobility markets: electric bikes, cars, buses and boats.
Production is slated to begin in September 2019.
CEA (Leti & Liten) will host a ‘CEA Tech Village’ at booth 51253
in Eureka Park
Visitors will see a battery-equipped with Sigma Cells technology
installed on an electric bike. The demonstration will allow them to
remove a battery cell to prove that the battery continues working,
because Sigma Cells has found an alternative pathway.
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