Terminal Device Charge Control Unit for Wireless Game Controller
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Solution Overview
Problem
Conventional charging technologies for terminal devices with high current loads, such as wireless game controllers, struggle to efficiently manage charging currents when the device receives drive requests for components like vibrating motors during charging, leading to inefficient charge control and potential battery degradation.
Innovation Solution
A terminal device with a charge control unit that switches between two modes: a first mode for preliminary and quick charging when no drive request is received, and a second mode for slow charging when a drive request is active, allowing for stable operation and reduced battery burden during high current demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If quick charge mode is used to rapidly charge the battery, then charging speed is improved, but battery stress and potential degradation increase
Solution Approach 1:
The charging control unit dynamically switches between first charge control mode and second charge control mode based on whether a drive request signal is received. When a drive request is received during quick charging, the system transitions to the second mode with lower charging current, thereby reducing battery stress while responding to high current demands from loads like vibrating motors.
Solution Approach 2:
The system changes the charging current parameter based on operational conditions. In the first mode, high charging current is applied for rapid charging. Upon receiving a drive request signal, the system switches to the second mode with reduced charging current, thus adapting the charging parameter to prevent battery degradation during high load conditions.
2Productivity
If high current is supplied to the battery during charging, then charging efficiency is improved, but battery stress and degradation increase
Solution Approach 1:
The charging control unit receives feedback in the form of a drive request signal that indicates whether the load requires high current. Based on this feedback, the system adjusts the charging current accordingly - maintaining high current for efficient charging when no drive request is received, and reducing current when a drive request signal indicates high current demand from the load.
3Reliability
If charging current is reduced to protect the battery, then battery stress is reduced, but charging speed decreases
Solution Approach 1:
The system employs periodic assessment of drive request signals to determine charging mode. Rather than continuously reducing current, the system periodically checks for drive request signals and adjusts charging current accordingly, enabling quick charge during normal periods and reducing current only when drive requests are detected, thus maintaining overall charging speed while protecting the battery when needed.
Data Source
AI summary
A technology for charging the battery of a terminal device with efficiency. In a wireless game controller, a charge control unit supplies electric power from an external power supply to a battery. A communication management unit receives a drive request signal to a vibrating motor. A motor control unit supplies a drive current to the vibrating motor in accordance with the drive request signal. The charge control unit performs charge control for the battery in a first mode when the communication management unit does not receive the drive request signal, and performs charge control for the battery in a second mode when the communication management unit does receive the drive request signal. The charge control unit performs the charge control for the battery in the first mode using a charging current higher than that in the second mode.