Battery Detector for Portable Devices Without ID Terminal
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Solution Overview
Problem
Conventional battery detectors for portable electronic devices rely on an internal ID terminal to determine if a battery module is coupled, but without this terminal, they cannot accurately assess the connection, leading to erroneous operations and malfunction during startup.
Innovation Solution
A battery detector system using a charger, MOS switch, voltage detector, microcontroller, and enable control circuit to determine the battery module connection by analyzing DC voltage and charging current through a detecting resistor, allowing the device to differentiate between power from a battery module and an external transformer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the ID terminal is removed from the battery module to reduce cost, then manufacturing cost is reduced, but the ability to detect battery module connection is lost
Solution Approach 1:
The patent introduces a detecting resistor as an intermediary component between the charger and the battery module. This resistor enables the detection of battery connection status by measuring voltage or current changes, replacing the function previously performed by the ID terminal without requiring modification to the battery module itself.
Solution Approach 2:
The patent creates a functional copy of the ID terminal's detection capability through the detecting resistor and control circuit. Instead of relying on the physical ID terminal in the battery module, the system replicates the detection function using external components that measure electrical parameters to infer battery connection status.
2Device complexity
If the control circuit peremptorily starts the charger without accurate battery detection, then startup procedure is simplified, but erroneous operations and device malfunction occur
Solution Approach 1:
The patent implements preliminary detection of battery module connection status before initiating the charging operation. The control circuit measures voltage or current through the detecting resistor to confirm battery presence, ensuring that charging only starts when appropriate, thereby preventing erroneous operations while maintaining a relatively simple startup流程.
3Ease of operation
If the LCD panel is lightened during startup without battery detection, then user interface is improved, but the device shuts down when power is insufficient
Solution Approach 1:
The system performs preliminary detection of battery module connection before lightening the LCD panel during startup. By confirming battery presence through voltage or current measurement, the system ensures sufficient power availability before activating power-consuming components, preventing unexpected shutdowns while maintaining good user interface visibility.
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
Enables accurate detection of battery module connection, preventing erroneous operations and ensuring smooth startup procedures by determining the source of power, thus maintaining device functionality.
Implementation Method 1
a voltage detector, coupled to the first voltage terminal, asserting a hardware signal when a first voltage is higher than a threshold voltage
Implementation Method 2
a current detector coupled to the first end and the second end of the detecting resistor to detect a charging current of the detecting resistor
Implementation Method 3
a metal-oxide-semiconductor (MOS) switch, coupled between the charger and the first end of the detecting resistor, configuring electrical connection states between the charger and the first end of the detecting resistor as a close state or an open state
Data Source
AI summary
Various embodiments of a battery detector are provided. In one aspect, a battery detector of a portable electronic device is applied to a battery module without an identification (ID) terminal. When the portable electronic device receives a direct current (DC) voltage provided by an external transformer to conduct a startup procedure, the battery detector detects whether the battery module is connected to the portable electronic device or not, and prevents the portable electronic device from conducting erroneous operations.