Battery Charging Circuit for Heterogeneous Cell Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery charging technologies struggle to efficiently and effectively charge heterogeneous battery cells with different capacities, often leading to imbalanced charging and potential aging of the batteries.
Innovation Solution
A method and device for charging multiple battery cells by obtaining state information for each cell, determining individual charging profiles and modes based on that information, and controlling a battery charging circuit with switches to apply appropriate currents and voltages to each cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single charging profile is applied to all battery cells, then the charging process is simple, but heterogeneous battery cells with different capacities experience imbalanced charging and potential aging
Solution Approach 1:
The patent divides the battery pack into multiple independent battery cell groups, each with its own charging control circuit. The controller separately manages charging parameters for each group based on their individual state of charge and capacity characteristics, enabling independent charging profiles for heterogeneous cells while maintaining overall system coordination.
Solution Approach 2:
The patent implements localized charging control by applying different charging parameters (current, voltage, timing) to different battery cell groups according to their specific capacity and state. Each charging control circuit tailors the charging profile to the local characteristics of its associated battery cells, ensuring optimal charging for each group while maintaining system-wide balance.
2Reliability
If individual charging profiles are determined for each battery cell, then charging balance and performance are optimized, but the control system complexity increases
Solution Approach 1:
The patent employs a universal controller that manages multiple battery cell groups through a standardized control architecture. The controller executes a unified charging algorithm that adapts parameters for each cell group, and the charging control circuits are designed with identical functional blocks that can be replicated across different groups, reducing overall system complexity through standardization.
Solution Approach 2:
The patent combines multiple charging control functions into an integrated control system where the controller coordinates all battery cell groups simultaneously. By merging the charging control circuits into a unified architecture with shared control logic and centralized monitoring, the system achieves individualized charging profiles without proportionally increasing complexity.
3Productivity
If high current is applied to charge battery cells rapidly, then charging speed increases, but battery aging and potential damage occur
Solution Approach 1:
The patent implements dynamic charging control by continuously adjusting charging parameters based on real-time battery state monitoring. The controller modifies current and voltage levels adaptively throughout the charging process, applying higher currents when batteries can accept them and reducing currents as batteries approach full charge or show signs of stress, thereby optimizing both speed and safety.
Solution Approach 2:
The patent employs periodic charging cycles with alternating high-current and low-current phases. The charging control circuit switches between different current levels in periodic intervals, allowing rapid charging during high-current phases while providing recovery periods during low-current phases to minimize battery stress and aging, thus balancing speed and reliability.
Data Source
AI summary
A battery charging circuit for charging batteries includes a first switch connected in series between a first pole of a power supply and a first pole of the first battery cell, a second switch connected in parallel between the first pole of the first battery cell and a second pole of the first battery cell configured to adjust a size of a current applied to the first battery cell, a third switch connected in parallel between a first pole of the second battery cell and a second pole of the second battery cell, the third switch being configured to adjust a size of a current applied to the second battery cell, and a fourth switch connected in series between the second pole of the first battery cell and the first pole of the second battery cell.