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How we make 15-minute

charging possible

How we make 15-minute

charging possible

To deliver EV charging that is truly fast, while also safe, reliable,

and affordable, we had to build an end-to-end energy stack.

To make EV charging truly fast, while also safe,

reliable, and affordable, we had to build

an end-to-end energy stack.

To deliver EV charging that is truly fast, while also safe, reliable, and affordable, we had to build an

end-to-end energy stack

Taking the stack

up to bus scale

Taking the stack

up to bus scale

Battery

Management

System

Battery Management

System

Our technology scales up to 400kWh+ bus battery packs using a master-slave BMS architecture. Each sub-packs has its own BMS, with a master BMS coordinating charging in tandem.

Our technology scales up to 400kWh+ bus battery packs using a master-slave BMS architecture. Each sub-packs has its own BMS, with a master BMS coordinating charging in tandem.

Virtual

Cell Model

Virtual

Cell Model

Each subpack has it's own BMS. Which monitors every cell and along with virtual cell model

Dynamic Charging

Algorithm

Dynamic Charging

Algorithm

Offboard

Thermal

Management

Offboard

Thermal

Management

Offboard cooling

for all vehicles

Offboard cooling

for all vehicles

Why?

Why?

Why?

While driving, a commercial vehicle barely generates any

heat in the battery pack, with average C rates of 0.3C

But rapid charging the battery pack generates roughly 200x

the normal heat, with an average C rate of 4C

X200

We only need a heavy-duty HVAC system while rapid charging and not while driving – so we put it in the charger instead of inside every vehicle

We only need a heavy-duty HVAC system while rapid charging and not while driving – so we put it in the charger instead of inside every vehicle

Off-Board cooling is needed for all categories.

As the vehicle size scales-up, so do battery capacities and hence total heat generated during rapid charging in proportion to battery capacity. A 3W (~ 10kwh battery capacity) will need a 1-2Tr cooling system (150kgs), while a bus ( 400kwh battery pack) with 1.5MW of charging will need a 30-50Tr cooling system, which is near impossible to package onto a bus.


Across all categories off-board cooling unlocks significant weight, volume and cost advantages for the vehicle. An off-board chiller is shared by multiple vehicles there-by distributing cost pressures.