Vehicle Battery Circuit Reconfiguration for Multi-Stage Fast Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-stage direct current fast charging (DCFC) processes for vehicle batteries do not typically involve control of circuit configurations, which can lead to inefficiencies in charging speed and battery protection.
Innovation Solution
A method and system for multi-stage charging control of vehicles, which involves determining charging stage capabilities, selecting appropriate charging circuit configurations based on criteria such as available power and user preferences, and adjusting these configurations dynamically during charging to optimize the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-stage DCFC charging is applied to balance rapid charging goals with battery protection, then battery safety is improved, but charging speed and efficiency deteriorate due to lack of circuit configuration control
Solution Approach 1:
The patent implements dynamic switching between series and parallel circuit configurations during the charging process. The system transitions from a parallel configuration (providing higher current for faster charging) to a series configuration (providing higher voltage for battery protection) based on real-time charging stage and battery conditions, thereby resolving the contradiction between charging speed and battery protection
Solution Approach 2:
The patent changes the electrical parameters of the charging circuit by switching between series and parallel configurations. This alters the voltage and current characteristics dynamically throughout the charging process, enabling the system to achieve both rapid charging and battery protection by adjusting circuit parameters according to charging needs
2Productivity
If different circuit configurations are selected based on multiple charging criteria, then charging efficiency is improved, but system complexity increases
Solution Approach 1:
The patent employs a feedback-based control system that continuously monitors charging criteria (such as battery state of charge, temperature, and power availability) and automatically adjusts the circuit configuration accordingly. This feedback mechanism enables efficient charging while managing system complexity through automated decision-making algorithms
3Adaptability or versatility
If circuit configurations are adjusted dynamically during charging, then charging flexibility is improved, but control complexity increases
Solution Approach 1:
The patent makes the charging circuit dynamically reconfigurable by switching between series and parallel configurations based on real-time charging conditions. This dynamic adaptability allows the system to flexibly respond to different charging scenarios while the control complexity is managed through predefined switching criteria and automated control logic
Data Source
AI summary
Techniques are provided for multi-stage charging control of a vehicle. In one embodiment, the techniques involve determining a charging stage capability of a charging source, upon determining that the charging stage capability includes multi-stage charging, determining a first charging criteria, selecting a first charging circuit configuration based on the first charging criteria, where the first charging circuit configuration includes a first combination of cell groups of a rechargeable energy storage system of the vehicle, charging the rechargeable energy storage system via the first charging circuit configuration, determining a second charging criteria, selecting a second charging circuit configuration based on the second charging criteria, where the second charging circuit configuration includes a second combination of cell groups of the rechargeable energy storage system, and charging the rechargeable energy storage system via the second charging circuit configuration.