Battery Management System with Dynamic Charging Current Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery charging circuits are large, costly, and inefficient due to fixed voltage outputs and unbalanced charging issues across battery cells, leading to over-voltage conditions and incomplete charging.
Innovation Solution
A battery management system with a monitoring circuit and controllable charger that adjusts charging current based on individual cell status, enabling multiple charging modes and preventing over-voltage conditions by integrating a control circuit within the battery pack, allowing for real-time monitoring and adjustment of charging parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional fixed voltage output charging circuits are used, then the charging process is simple, but the system size is large and cost is high
Solution Approach 1:
The patent implements dynamic charging current adjustment by monitoring individual cell voltages and automatically modifying the charging current in real-time. The charging circuit transitions from a static fixed-voltage design to a dynamic system that adapts charging parameters based on battery pack conditions, thereby reducing the need for oversized protective components while maintaining safety.
Solution Approach 2:
The patent incorporates a monitoring circuit that continuously measures individual cell voltages and provides feedback to the charging control circuit. This feedback mechanism enables automatic adjustment of charging current to prevent over-voltage conditions, eliminating the need for large safety margins in component design and reducing overall system size and cost.
2Manufacturing precision
If conventional fixed voltage charging is used, then the charging circuit is simple, but charging accuracy across cells is insufficient leading to over-voltage conditions
Solution Approach 1:
The patent applies local quality by monitoring and controlling the charging current for each individual cell based on its specific voltage level. Instead of uniform charging, the system identifies cells with lower voltages and directs charging current preferentially to those cells, ensuring each cell receives appropriate charging attention and preventing over-voltage conditions in any individual cell.
Solution Approach 2:
The charging circuit dynamically adjusts current distribution among cells based on real-time voltage measurements. The system transitions from static uniform charging to dynamic selective charging, continuously modifying charging parameters to maintain charging accuracy and prevent over-voltage conditions across all cells.
3Reliability
If multiple components (adapter, controller, switch) are used for charging control, then charging functionality is achieved, but the system becomes large and costly
Solution Approach 1:
The patent merges the monitoring function and charging control function into a single integrated circuit within the battery pack. This consolidation eliminates the need for separate external controllers and switches, reducing component count while maintaining reliable charging control through the unified monitoring and control architecture.
Solution Approach 2:
The battery pack's integrated monitoring circuit performs self-diagnosis and automatically controls the charging current without requiring external control chips or switches. The system serves itself by detecting voltage imbalances and autonomously adjusting charging parameters, thereby eliminating the need for additional control components and reducing system complexity.
Data Source
AI summary
A battery management system includes a monitoring circuit and a charger. The monitoring circuit is operable for monitoring a battery pack that includes a plurality of cells, and for checking an unbalanced condition of the battery pack in each cycle of a plurality of cycles. The charger is operable for controlling a charging current to the battery pack and for receiving monitoring information from the monitoring circuit, and for adjusting the charging current from a first level in a previous cycle to a second level that is lower than the first level in response to a detection of the unbalanced condition in a current cycle.