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Unveiling the Speed: A Deep Dive into EV Fast Charging

Unveiling the Speed: A Deep Dive into EV Fast Charging

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How does EV fast charging work?

As the automotive industry embraces the electric revolution, one of the critical aspects shaping the EV landscape is fast charging technology. We'll take an in-depth look at the mechanics behind EV fast charging, exploring the science that enables electric vehicles to power up quickly and efficiently.

Electric vehicles have gained popularity not only for their eco-friendly credentials but also for the promise of quick and convenient charging. We'll delve into the reasons behind the demand for fast charging, examining how it addresses range anxiety and enhances the overall EV ownership experience.

High Power Levels

EV fast charging operates at higher power levels than standard charging methods. While Level 1 and Level 2 chargers typically deliver power in the range of 3 to 22 kilowatts (kW), fast chargers can provide power levels exceeding 50 kW, and some even go beyond 350 kW.

Charging Standards

There are different charging standards in use globally. The major ones include CHAdeMO, CCS (Combined Charging System), and Tesla's proprietary Supercharger network. These standards dictate the physical connectors and communication protocols between the charging station and the vehicle.

Vehicle Communication

When you connect your electric vehicle to a fast charger, a communication protocol is established between the vehicle and the charging station. This communication ensures that both systems can exchange information about the state of charge, power capabilities, and other relevant data.

Power Conversion

The fast charging station contains power electronics that convert the grid's AC power to the DC power needed by the vehicle's battery. This conversion process is crucial for delivering power to the vehicle efficiently.

Bypassing the Onboard Charger

In many fast-charging scenarios, the vehicle's onboard charger is bypassed. Instead of converting AC to DC within the vehicle, the fast charger performs this conversion externally. This reduces heat generation and allows for a more rapid and efficient charging process.

Continuous Monitoring

Throughout the charging process, both the vehicle and the charging station continuously monitor various parameters such as battery temperature, voltage, and charging rate. These checks help ensure the safety and health of the battery.

Temperature Management

To prevent overheating and damage to the battery, fast chargers often incorporate active temperature management systems. These systems may adjust the charging rate based on the battery's temperature to optimise both speed and safety.

Charging Curve

EV fast charging is not a linear process. The charging rate typically follows a curve, and it may slow down as the battery approaches its maximum capacity. This is done to protect the battery and maximise its lifespan.

Completion and Disconnect

Once the battery reaches the desired state of charge or the user manually stops the charging session, the fast EV charger signals the vehicle to disconnect. The user can then unplug the vehicle, and it's ready for the next journey.


As we conclude our deep dive into EV fast charging, readers will have a comprehensive understanding of the technology powering the swift evolution of electric mobility. The journey from standard charging to high-speed replenishment is not just about convenience; it's a testament to the relentless pursuit of sustainable and efficient transportation.

Is EV fast charging the option for you? 

As premier EV charger installers in Peterborough, Impra Charge delivers seamless installations throughout the UK, ensuring prompt service within 14 days of approval and providing 3-year warranty on all installations.