Adaptive EV Regeneration With Battery Voltage Reconfiguration
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Solution Overview
Problem
Electric vehicles face challenges in efficiently capturing and recapturing energy during braking or deceleration, especially at low speeds, due to voltage potential differences between the battery system and the power source.
Innovation Solution
The adaptive regeneration system dynamically manages the voltage potential of the battery system by adjusting electrical connections between batteries, using components like MOSFETs and solid state relays, to match the output voltage of the power source, thereby optimizing energy capture across a broad range of speeds and voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If energy is captured during braking or deceleration, then energy recapture efficiency is improved, but voltage potential differences between batteries prevent effective capture at low speeds
Solution Approach 1:
The system dynamically reconfigures battery connections between series and parallel arrangements based on real-time voltage requirements. During low-speed braking, the system switches to parallel connections to match lower voltage potentials, enabling energy capture that would otherwise be impossible due to voltage mismatches.
Solution Approach 2:
The invention changes the electrical configuration parameters of the battery system by switching between series and parallel connections. This parameter change allows the battery voltage to adapt to different operating conditions, particularly enabling voltage matching during low-speed deceleration when kinetic energy recovery is most challenging.
2Loss of time
If high voltage charging is used to reduce charging times, then charging speed is improved, but battery damage risk increases
Solution Approach 1:
The system dynamically adjusts battery configuration during charging operations. By switching between series and parallel connections, the system can accept higher charging currents in parallel configuration while maintaining appropriate voltage levels, enabling faster charging without exceeding battery voltage ratings and causing damage.
Solution Approach 2:
The battery system is segmented into multiple modules that can be independently configured. This segmentation allows the system to distribute charging current across multiple parallel-connected battery strings, increasing total charging capacity while keeping individual battery voltage within safe operating limits.
3Power
If batteries are connected in series to increase voltage, then voltage output is improved, but energy capture capability at low speeds decreases
Solution Approach 1:
The system dynamically switches between series and parallel battery configurations based on operational mode. During regenerative braking at low speeds, it transitions to parallel connections for voltage matching, while during high-speed operation or propulsion, it uses series connections for maximum voltage and power output.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach increases the efficiency of energy recapture and storage in the batteries, extending the driving range of electric vehicles and reducing charging times, while minimizing the risk of battery damage from high-voltage charging.
Implementation Method 1
energy can be recaptured during braking or deceleration of an electric vehicle that is in motion
Implementation Method 2
The adaptive regeneration system dynamically manages the voltage potential of the battery system by adjusting electrical connections between batteries
Data Source
AI summary
Systems and methods are disclosed for adaptive regeneration systems for electric vehicles. In one embodiment, an example method may include determining, by an adaptive regeneration system, that an electric vehicle is decelerating, determining an output voltage of a power source at the electric vehicle, determining that a voltage potential of a battery system at the electric vehicle is greater than the output voltage, and causing the voltage potential of the battery system to be modified to a value equal to or less than the output voltage.