Embedded Files
Regenerative Trailer Braking System
Regenerative Trailer Braking System
Key components
Key components
We opted for a brushless DC (BLDC) motor to be used as our generator. This is used in many electric conversions of some cars, scooters, and bicycles. This motor is connected to a gear on the axle via a chain that spins to produce power, and when the BLDC motor is engaged, it slows down the trailer to a halt while regenerating energy.
This motor controller acts as to redirect current flow through the motor to create an electric braking effect. The controller is also used to manage the power flow into the battery. By modifying the controller, we can achieve the optimal performance for our regenerative braking system.
This battery withstands frequent charge and discharge cycles without significant degradation, stores enough energy from multiple braking events to power external systems, operates with high efficiency to minimize energy loss, and matches the motor’s voltage and current output for stable power delivery.
This microcontroller is responsible for quickly breaking the circuit by sending a signal to the relay, achieving a target action time of 0.5 seconds. Due to budget constraints, ESP32 modules are used, which effectively control the relay to perform the necessary switching operation.
The high power relay allows us to isolate the generator from the battery in the event of an emergency. Being able to reliably shut down the system is a key to maximizing safety for the system and the user.
Applicable Standards
Applicable Standards
Battery and Energy Storage Standards
ISO 12405: Performance testing of lithium-ion batteries. This covers the efficiency and thermal behavior of the battery.
IEEE 1725: Standard for rechargeable batteries for portable computing.
Battery management system (BMS): a computerized system that monitors and manages the internal operating characteristics of a battery, ensuring its safe and efficient operation.
Controls Standards
CAN ISO 11898: CAN Bus Protocol System is used for system-level communication between controllers and the battery management system.
Mechanical Standards
IEC 60068: Environmental testing will be applied to all mechanical systems on the trailer and tow vehicle.
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