EV Battery Charging Control System
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Solution Overview
Problem
Electric vehicle batteries face damage from overcharging and over-discharging, leading to reduced lifespan, as existing charging systems typically charge to maximum capacity without considering the user's immediate needs or battery health.
Innovation Solution
A vehicle system that allows users to select a customized charge level based on future travel plans and modifies this level based on present and historic vehicle conditions, using a controller to disable charging when the selected level is reached, thereby avoiding excess cycling and undesired charge levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery is charged to maximum capacity, then the energy storage is maximized, but the battery lifespan is reduced due to overcharging and excess cycling
Solution Approach 1:
The charging limit is made dynamic rather than fixed at maximum capacity. The system adjusts the charging threshold based on real-time battery state (state of charge, temperature, age) and user-defined preferences, allowing the charging cutoff point to vary adaptively to balance energy storage with battery health preservation
Solution Approach 2:
The system continuously monitors battery parameters (state of charge, temperature, cycle count) and uses this feedback to adjust charging behavior. The controller receives input about present charge values and compares them against dynamic thresholds, automatically disabling charging when the limit is reached to prevent overcharging and extend battery life
2Device complexity
If the charging system charges to a fixed maximum level, then the charging control is simple, but it cannot adapt to user's future travel plans or battery health conditions
Solution Approach 1:
The system allows users to pre-define charging preferences and travel plans in advance. Based on these preliminary inputs, the system automatically calculates and sets appropriate charging thresholds before charging begins, eliminating the need for complex real-time adjustments while maintaining high adaptability to user needs
Solution Approach 2:
The charging threshold transitions from a static fixed value to a dynamic parameter that adjusts based on user preferences, battery state, and predicted travel requirements. This dynamic adjustment mechanism enables the system to adapt to varying conditions without requiring complex manual intervention
Data Source
AI summary
A vehicle is provided with a motor that is adapted to provide drive torque and a storage device that is connected to the motor and adapted to receive power for charging from an external supply. The vehicle also includes a user interface and a controller. The user interface is adapted to provide a charge level selection. The controller is configured to receive a present charge value of the storage device and to disable charging from the external supply in response to the present charge value corresponding to the charge level selection.