EV Battery Charging Control Law for Faster Safe Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery charging methods for electric vehicles are inefficient in terms of time and energy, leading to excessive charging times due to their generalized nature, which results in suboptimal outcomes for specific battery packs.
Innovation Solution
A method that determines a control law adapted to reduce charging time by considering system characteristics and operating parameters, utilizing both thermal and current control values to optimize the charging process, implemented in a control device such as a battery management system or EV charging unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional generalized charging methods are used, then the charging process is simple to implement, but the charging time is excessive and efficiency is low
Solution Approach 1:
The patent implements dynamic charging control by continuously adjusting charging parameters based on real-time battery state measurements. The control system modifies charging current and voltage dynamically according to battery temperature, charge state, and other operating conditions, transitioning from static conventional charging to adaptive dynamic charging that optimizes charging speed while maintaining safety.
Solution Approach 2:
The patent changes multiple charging parameters simultaneously including current, voltage, temperature thresholds, and power limits based on battery state. By adjusting these parameters dynamically according to real-time measurements, the system achieves faster charging times while preventing thermal runaway and other safety issues that would occur with fixed-parameter charging methods.
2Productivity
If a customized control law is determined for each battery pack, then charging time is reduced and efficiency is improved, but the system complexity increases
Solution Approach 1:
The patent implements comprehensive feedback control by continuously measuring battery state parameters (temperature, charge state, voltage, current) and using this feedback to adjust charging parameters in real-time. The control system compares actual battery state against target states and automatically modifies charging parameters to achieve optimal charging performance, creating a closed-loop control system that adapts to each battery pack's unique characteristics.
Solution Approach 2:
The control system automatically determines and adjusts charging parameters without requiring manual intervention or complex external control. The battery management system autonomously monitors battery state, selects appropriate charging strategies, and adjusts parameters based on pre-programmed control laws, enabling the system to serve itself and eliminate the need for complex external control infrastructure.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure relates to a method (100) for operating a battery charging process of a battery pack of an electric vehicle, EV, the method comprising obtaining (101) data indicative of system characteristics and operating parameters of the battery pack, determining (102) a control law adapted to, within a charge operating domain, reduce a charging time of said battery pack subject to said data and implementing (103) the control law for operating said battery charging process.