Regenerative braking issues in electric vehicles (EVs) typically manifest as follows:
- Slow or delayed response: There is often a brief delay when switching the electric motor from driving mode to generator mode during braking, causing slower regenerative braking response times.
- Limited energy recovery capacity: The electric motor acting as a generator has a limited ability to absorb kinetic energy from the wheels, restricting the amount of energy that can be recaptured especially at lower speeds or under certain conditions.
- Restrictions based on vehicle and battery conditions: Regenerative braking is limited by factors such as vehicle speed, accelerator and brake pedal signals, and the battery’s state of charge (SOC). For example, regenerative braking may be disabled or reduced when the battery is over 90% charged or under about 10% SOC to prevent overcharging or damage.
- Reduced effectiveness at low speeds: Regenerative braking is generally ineffective below a certain vehicle speed, which means that mechanical brakes must engage for complete stopping, reducing overall efficiency.
- Impact on traditional brakes: Because regenerative braking reduces the usage of mechanical brakes, it can lead to issues such as moisture buildup, corrosion, and rust on brake components due to infrequent use.
- Potential impact on vehicle dynamics: The balance between regenerative and friction braking is carefully managed for vehicle stability and traction, and improper functioning can affect braking feel or handling.
In summary, regenerative braking in EVs may show issues like slow engagement, limited braking energy recovery especially at low speeds or certain battery states, and side effects on traditional brake system maintenance. These issues arise due to the complex interaction between the electric motor/generator, powertrain limits, and battery management constraints.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-do-regenerative-braking-issues-typically-manifest-in-evs/
