Battery Charging Control via Cell Block Segmentation
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Solution Overview
Problem
Conventional battery charging methods often lead to battery deterioration and safety risks due to uneven terminal voltages across cell blocks, as they typically supply charging voltage exceeding safety limits, failing to address individual deteriorated cell blocks effectively.
Innovation Solution
A battery charging method and device that continuously monitor terminal voltages, implement over-voltage protection, and adjust charging current based on preset thresholds to prevent overcharging and ensure full charge without exceeding safety limits, using a control module to manage charging and detect terminal voltage differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional charging methods supply charging voltage exceeding safety limits to ensure full charge, then battery charging completeness is improved, but battery deterioration and safety risks increase
Solution Approach 1:
The patent segments the battery module into multiple cell blocks and implements independent voltage detection and control for each cell block. The control module identifies deteriorated cell blocks by comparing terminal voltages of individual cell blocks and applies different charging strategies to normal versus deteriorated cell blocks, thereby preventing overcharging of vulnerable cells while maintaining charging efficiency.
Solution Approach 2:
The patent dynamically adjusts charging parameters based on the detected state of cell blocks. When a deteriorated cell block is identified (terminal voltage exceeding threshold), the control module reduces or stops charging current to that specific cell block. This parameter adjustment prevents overcharging and safety hazards while allowing continued charging of normal cell blocks.
2Reliability
If conventional charging methods use overall over voltage protection for the entire battery module, then overcharging protection is provided, but it cannot reduce the risk caused by a single deteriorated cell block
Solution Approach 1:
The patent divides the battery module into multiple independently monitored cell blocks with individual voltage detection. The control module identifies deteriorated cell blocks by comparing terminal voltages of each cell block and applies targeted protection to only those specific cell blocks that exceed voltage thresholds, rather than protecting the entire module uniformly.
Solution Approach 2:
The patent implements localized protection by applying different charging control strategies to different cell blocks based on their individual states. Normal cell blocks receive standard charging current while deteriorated cell blocks receive reduced or zero charging current, thereby providing precise local protection where needed without compromising overall charging efficiency.
3Productivity
If charging voltage is continuously supplied to ensure full charge, then charging efficiency is improved, but terminal voltage difference between cell blocks increases causing deterioration
Solution Approach 1:
The patent segments the battery into multiple cell blocks with independent voltage monitoring. The control module detects terminal voltage differences between cell blocks and identifies deteriorated cell blocks by comparing their voltages against normal cell blocks. This segmentation enables differentiated charging control to maintain voltage uniformity.
Solution Approach 2:
The patent dynamically changes charging parameters based on real-time voltage detection. When terminal voltage difference exceeds a threshold indicating deteriorated cell blocks, the control module adjusts charging current distribution to reduce voltage differences, thereby maintaining stability while continuing efficient charging of normal cell blocks.
Data Source
AI summary
A battery charging method and device thereof are disclosed. The method includes the following steps. First, a charging current is supplied into a plurality of cell blocks of a battery module for charging, and the terminal voltages of the cell blocks are detected, when one of said terminal voltages exceeds a first threshold, the charging is kept continuously over a first preset time period. If one of said terminal voltages of said cell blocks exceeds a second threshold, an over voltage protection is performed, else the charging current is reduced and the battery module is charged by the reduced charging current continuously over a second preset time period and if the cell blocks are determined that they are fully charged, the charging is stopped, otherwise, the battery module is charged continuously. Therefore, the battery charging method and device thereof in accordance with the present invention can prevent the battery module from being overcharged and prolong its life.