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Is Fast Charging Bad for EV Battery?

by CLcoolladen 10 May 2024 0 Comments

For most electric vehicle (EV) drivers, fast charging comes as a second thought rather than as the first choice. Aside from logistics, pricing, and the overall convenience of the experience, rapid charging is often associated with battery degradation. Read all the EV primers online and you'll see how DC fast charging isn't a highly suggested option.

While EV battery technologies have evolved to adapt to high-powered charging, it is still considered a major culprit in shortened battery life. So, is fast charging bad for EV battery? The short answer is no, as long as it's done in moderation.

How Does DC Fast Charging Work?

DC fast charging replenishes an electric vehicle's battery much quicker than traditional AC charging. Instead of converting AC power from the grid into DC power within the vehicle, as AC chargers do, DC fast chargers supply direct current (DC) power directly to the vehicle's battery. This bypasses the vehicle's onboard charger, allowing for significantly faster charging times.

DC Fast charging stations have varying power outputs, but they are ten or more times faster than regular AC chargers. DC chargers can bring your EV's battery from 0 to 80% in under an hour, depending on its capacity.

Preserving Your Electric Car Battery

EV batteries are the heart of the vehicle's power system, and their health directly impacts performance and longevity. To preserve an EV battery, several factors must be considered:

1:Battery Management System (BMS): EVs are equipped with sophisticated BMSs that monitor and regulate various parameters such as temperature, voltage, and charging rates to optimize battery performance and longevity.

2:Thermal Management Systems: Robust thermal management systems dissipate heat generated during charging to prevent overheating, which can degrade battery cells.

3:Charging Practices: Following best charging practices, such as avoiding extreme temperatures, utilizing scheduled charging, and adhering to manufacturer guidelines, helps maintain battery health.

Charge at Moderate Rates

When utilizing fast charging, opt for moderate charging rates to balance speed with battery health. High charging rates can generate excess heat, which may stress the battery and contribute to degradation over time. Consult your EV's manual or charging specifications to determine the optimal charging rate for your vehicle. Some EV manufacturers equip their EVs with software and battery limitations control that curtail fast charge speeds once the state of charge reaches 80%.

Avoid Extreme Temperatures

Charging in extreme temperatures, whether excessively hot or cold, can negatively impact battery performance and health. High temperatures accelerate battery degradation, while low temperatures can reduce charging efficiency and capacity. Whenever feasible, charge in moderate temperature conditions to maintain battery health.

Utilize Scheduled Charging

Take advantage of scheduled charging features available in many EVs to optimize charging times and avoid prolonged exposure to high state-of-charge (SoC) levels. Scheduled charging allows you to set charging times based on your daily routine, ensuring that the battery is charged when needed without overcharging or underutilizing the charging infrastructure.

Follow the Manufacturer’s Guidelines

Adhere to the manufacturer's guidelines and recommendations regarding charging practices, including maximum charging rates, SoC levels, and frequency of fast charging. Each EV model may have specific requirements and limitations based on battery technology, thermal management systems, and other factors. By following the manufacturer's guidelines, you can maximize battery longevity and performance while minimizing the risk of damage.


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