Battery Swelling Suppression via Conductive Label Detection
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Solution Overview
Problem
Notebook and tablet computers often experience unexpected battery swelling, which can damage the device, necessitating a solution to prevent this issue.
Innovation Solution
An electronic device comprising a battery cell with multiple conductive labels and a Battery Management Unit (BMU) that detects the states of these labels to determine the appropriate charging voltage, thereby suppressing battery swelling and extending the battery's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If continuous charging at high voltage is applied to extend battery service life, then battery capacity is maintained, but battery swelling occurs and safety is compromised
Solution Approach 1:
The patent implements dynamic charging voltage adjustment based on real-time detection of battery state and conductive label conditions. The BMU dynamically modifies charging parameters to prevent swelling while extending service life, transitioning from static to dynamic control of the charging process
Solution Approach 2:
The system employs feedback mechanisms where the BMU continuously monitors battery voltage, current, and conductive label states, then adjusts charging voltage accordingly. This closed-loop feedback control prevents battery swelling by reducing voltage when swelling is detected while maintaining optimal charging when conditions are normal
2Measurement precision
If multiple detection mechanisms are added to monitor battery swelling, then detection precision is improved, but device complexity increases
Solution Approach 1:
The patent utilizes the battery's own structural components (conductive labels and housing) as detection elements. The conductive labels serve dual purposes: electrical connection and swelling indication through connection state changes. This self-service approach eliminates the need for separate detection mechanisms, maintaining simplicity while achieving accurate swelling detection
Solution Approach 2:
The conductive labels perform multiple functions: electrical conduction for charging and swelling detection indicators. This multi-functionality reduces the number of separate components needed, keeping the system simple while enabling precise swelling monitoring through the connection state of existing structural elements
Data Source
AI summary
An electronic device for suppressing battery swelling includes a first battery cell, a first conductive label, a second conductive label, a third conductive label, and a BMU (Battery Management Unit). The first battery cell includes a first nonconductive housing. The first conductive label, the second conductive label, and the third conductive label are disposed on the first nonconductive housing. The BMU outputs a charging voltage to the first battery cell. The BMU determines the voltage level of the charging voltage by detecting the states of the first conductive label, the second conductive label, and the third conductive label.