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Glossary

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Electric Vehicles

Feb.18.2024

FCEV

Fuel Cell Electric Vehicles

FCEVs are powered by hydrogen fuel cells, which combine hydrogen with oxygen to produce electricity. This electricity then powers the electric motor to propel the vehicle. FCEVs are more efficient than traditional internal combustion engines and offer a unique advantage in that they produce no harmful tailpipe emissions. The only byproducts from the process are water vapor and warm air, making them an environmentally friendly option.

Representative Models: Toyota Mirai, Honda Clarity, Hyundai Nexo, Mercedes-Benz GLC F-CELL, BMW i Hydrogen NEXT, Kia Borrego FCEV, Chevrolet Equinox FCEV, Audi h-tron quattro concept, etc.

Applications: Suitable for scenarios requiring long-distance travel and quick refueling, FCEVs are also seen as a significant step toward a sustainable transportation future due to their clean energy conversion process.

Fuel Cell Electric Vehicles are an innovative category within the broader landscape of electric mobility, and they hold great promise in reducing both greenhouse gas emissions and our dependence on fossil fuels.

BEV

An all-electric vehicle is powered exclusively by a battery-operated electric motor, which is charged via the power grid, i.e. it does not require any fossil fuel. This means that, locally, the vehicle is 100% emission-free. BEV stands for Battery Electric Vehicle.

Representative Models: Tesla Model S, Nissan Leaf, Chevrolet Bolt, Jaguar I-PACE, BMW i3, Audi e-tron, Volkswagen ID.4, Lucid Air

Applications: Suitable for local commuting, city driving, and any scenario where zero tailpipe emissions are desired. BEVs are also supported by a growing infrastructure of public charging stations.

HEV

A hybrid electric vehicle (HEV) is a type of hybrid vehicle that combines a conventional internal combustion engine (ICE) system with an electric propulsion system (hybrid vehicle drivetrain). The presence of the electric powertrain is intended to achieve either better fuel economy than a conventional vehicle or better performance.

Representative Models: Toyota Prius, Lexus RX 450h, Ford Fusion Hybrid, Hyundai Ioniq Hybrid, Honda Insight

Applications: Suitable for those looking to increase fuel efficiency while still relying on traditional gasoline refueling. HEVs provide an introduction to electric driving without the need for plug-in charging.

HEVs have been instrumental in the transition towards more fuel-efficient and environmentally friendly transportation, serving as a bridge between conventional gasoline-powered vehicles and fully electric options. By utilizing both an internal combustion engine and an electric motor, HEVs offer improvements in fuel consumption and reduced emissions.

PHEV

Plug-in hybrid electric vehicles (PHEVs) use batteries to power an electric motor and another fuel, such as gasoline or diesel, to power an internal combustion engine (ICE). This allows PHEVs to operate as electric vehicles (EVs) when charged, offering a limited range of pure electric driving, and as traditional ICE vehicles when the battery is depleted.

Representative Models: Chevrolet Volt, BMW i8, Ford Fusion Energi, Chrysler Pacifica Hybrid, Mitsubishi Outlander PHEV, BYD Qin, BYD Tang, Roewe e550

Applications: Suitable for those who desire the benefits of electric driving but also want the extended range and convenience of a gasoline engine. PHEVs can provide a more environmentally friendly alternative to traditional vehicles, with the flexibility to run on electricity when possible, while still offering the long-range capabilities of a gasoline engine.

PHEVs represent an exciting step toward electric mobility, allowing users to enjoy the benefits of electric driving without the range anxiety often associated with all-electric vehicles. The combination of electric and gasoline power provides a versatile and efficient transportation solution that aligns with the global shift toward cleaner energy sources.

REEV

REEVs are primarily driven by electric energy, and they are equipped with both an electric motor and a generator known as a range extender. The function of the range extender is to convert gasoline into electric energy to drive the motor when the battery's electric power is low or the vehicle is running at high speed. Unlike traditional hybrids, the range extender doesn't drive the vehicle directly, nor does it charge the battery with gasoline. This design increases the vehicle's electric range, offering greater flexibility.

Representative Models: BMW i3 Range Extender, Chevrolet Volt (when operating in range-extending mode), Guangqi Chuanqi GA5 Range Extender

Applications: Suitable for users who desire the benefits of an electric vehicle but may need to travel longer distances than the pure electric range allows. REEVs provide an excellent solution for bridging the gap between short-range electric driving and the need for longer-range capabilities without switching to a full gasoline mode.

VCU(Vehicle Control Unit)

The VCU is a central module within an electric vehicle that controls both powertrain functions and general vehicle functions. This includes interfacing with pedals, lighting systems, motor control, battery management, thermal management, and more. The VCU interprets inputs from various sensors and user commands, translating them into precise control signals for the different subsystems. It's essential for optimizing performance, efficiency, safety, and the overall integration of vehicle functions.

Applications: Integral to modern electric and hybrid vehicles, the VCU is the "brain" of the vehicle, orchestrating various systems to work in harmony and providing the best possible driving experience. Its role in coordinating powertrain and general vehicle functions makes it central to the functionality and user experience of the vehicle.

The VCU's role in coordinating various systems within the vehicle makes it an essential component, and its ability to integrate powertrain functions with other general vehicle features sets it apart as a complex and vital part of modern electric vehicle design.

MCU(Motor Control Unit)

The MCU is an electronic module in electric vehicles that acts as a mediator between the battery (which provides DC power) and the motor (which may be AC or BLDC). By converting the DC power from the battery to AC power for the motor, the MCU controls the vehicle's speed and acceleration based on the driver's throttle input. It ensures that the motor operates efficiently and provides the desired torque and speed according to the driver's demands.

Applications: The MCU plays a crucial role in electric and hybrid vehicles, effectively controlling the power delivery to the wheels. By carefully managing the motor's speed and torque, the MCU enhances the driving experience by providing smooth acceleration, efficiency, and responsiveness to driver commands. It also plays a part in regenerative braking, converting kinetic energy back into stored energy in the battery.

The Motor Control Unit's role in efficiently managing energy transfer from the battery to the motor makes it a key component in the performance and efficiency of electric vehicles.