Battery Reset Structure for Residual Power Discharge
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Solution Overview
Problem
Electronic devices with detachable batteries may experience malfunctions due to remaining power in the internal circuit after the battery is detached, leading to incorrect battery detection and unintended operations.
Innovation Solution
A battery reset structure that includes a switch circuit unit and a control circuit unit on a printed circuit board, which controls the connection between the battery's power signal and the device's components, ensuring that the device is powered off when the battery is detached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a detachable battery is used to reduce unit cost, then the device can be more economical, but remaining power in the internal circuit causes malfunction and incorrect battery detection
Solution Approach 1:
The patent extracts the problematic remaining power from the internal circuit by introducing a discharge circuit that actively removes residual electricity. The discharge circuit includes a discharge switch and discharge resistor that are separated from the normal power path, allowing the system to maintain simplicity while reliably eliminating the harmful remaining power that causes detection errors
Solution Approach 2:
The patent introduces an intermediary discharge circuit between the battery and the internal circuit. This intermediary component (comprising the discharge switch and discharge resistor) acts as a mediator to safely dissipate remaining power, preventing it from causing malfunction without interfering with normal operation when the battery is properly installed
2Use of energy by moving object
If the battery is detached, then power consumption stops, but remaining power in the internal circuit continues to cause abnormal operations
Solution Approach 1:
The patent converts the harmful remaining power into a beneficial discharge process. By providing a controlled discharge path with a discharge resistor, the system transforms the problematic residual electricity into a useful function that actively clears the internal circuit of harmful energy, preventing malfunction while maintaining system simplicity
Solution Approach 2:
The patent applies preliminary anti-action by preemptively discharging remaining power as soon as the battery is detached. The discharge switch is configured to activate automatically when the battery connection is broken, preventing the remaining power from causing any harmful effects before they can occur
3Duration of action of stationary object
If a new battery is mounted, then power supply is restored, but the device fails to detect the new battery immediately due to remaining power
Solution Approach 1:
The patent applies preliminary action by completely discharging the internal circuit before the battery mounting detection occurs. The discharge circuit ensures that all remaining power is removed in advance, so when a new battery is installed, the system is in a clean state ready to immediately detect and recognize the new battery without any delay caused by residual electricity
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 solution effectively consumes remaining power in the electronic device when the battery is detached, preventing malfunctions and ensuring the device does not perform unintended operations.
Implementation Method 1
a negative electrode contact portion which is at least partly located in the opening and configured to contact a negative electrode of the battery, wherein the negative electrode contact portion is connected to a second ground G2 of the printed circuit board
Data Source
AI summary
An electronic device is provided which includes a printed circuit board including an opening. The electronic device may include a switch circuit unit disposed on the printed circuit board and including an input portion to which a power signal of a battery is applied, an output portion from which the switch circuit unit is configured to output the power signal, and a first ground. The electronic device may include a control circuit unit disposed on the printed circuit board. The control circuit unit is configured to control a connection between the input portion and the output portion, and includes a contact terminal. The electronic device may include a positive terminal connected to the printed circuit board to transmit the power signal of the battery. The electronic device may include a negative terminal including a body portion, a control pin formed on the body portion, and a negative electrode contact portion.