Battery Swelling Detection via Phase Difference
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Solution Overview
Problem
Lithium ion batteries used in portable electronic devices are prone to swelling due to internal short-circuits, overcharging, high temperatures, or external pressure changes, which can lead to safety hazards such as ignition or explosion, necessitating a method to detect swelling and prevent accidents.
Innovation Solution
An electronic device with a conductive pattern between the battery and a back plate, connected to a circuit that transmits and receives signals to detect phase differences, determining if the battery is swollen based on these differences, thereby preventing safety incidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery is used in a portable electronic device, then the device gains power supply capability, but the battery may swell due to internal short-circuits, overcharging, high temperatures, or external pressure changes, leading to safety hazards such as ignition or explosion
Solution Approach 1:
The patent applies preliminary action by implementing a detection mechanism that monitors battery health status before swelling can lead to dangerous conditions. The controller continuously measures electrical parameters (voltage, current, temperature) and compares them against predetermined thresholds to identify early signs of battery degradation, enabling preventive action before swelling becomes hazardous.
Solution Approach 2:
The patent implements feedback by creating a closed-loop monitoring system where the controller receives real-time data from sensors measuring battery parameters, processes this information, and provides feedback signals to alert users or trigger protective measures. The system continuously adjusts its monitoring based on the battery's state, enhancing safety through dynamic feedback control.
2Measurement precision
If conventional battery monitoring methods are used, then the system structure remains simple, but the detection precision and reliability of battery swelling detection are insufficient
Solution Approach 1:
The patent applies universality by designing a controller that performs multiple functions: it manages battery charging/discharging operations, monitors temperature, measures voltage and current, detects battery swelling through multiple parameters, and provides user alerts. This multi-functional approach eliminates the need for separate dedicated sensors for each parameter, maintaining system simplicity while achieving comprehensive detection precision.
Solution Approach 2:
The patent utilizes parameter changes by monitoring multiple electrical and thermal parameters (voltage, current, temperature) that change in characteristic patterns when battery swelling occurs. By tracking the evolution of these parameters over time and comparing them against predetermined thresholds and patterns, the system achieves high detection precision through multi-parameter analysis rather than relying on a single sensor.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively detects battery swelling, preventing potential ignition or explosion by allowing for timely intervention and ensuring safety in portable electronic devices.
Implementation Method 1
detect a phase difference between the transmitted signal and the received signal, and determine whether the battery is swollen based on the phase difference
Data Source
AI summary
The present disclosure relates to a method and an electronic device for detecting a battery swelling. The device may include: a housing including a front plate, and a back plate facing away from and spaced from the front plate; a battery including a first surface facing the front plate and a second surface facing the back plate; a first layer including a conductive pattern parallel to the back plate, wherein at least a portion of the conductive pattern is interposed between the second surface of the battery and the back plate and a circuit electrically connected to a first point and a second point of the conductive pattern, and configured to transmit a signal to the first point and receive the signal from the second point; and further configured to: detect a phase difference between the transmitted signal and the received signal, and determine whether the battery is swollen based on the phase difference. The present disclosure may further include various other embodiments.