Battery Cutoff Control During Portable System Maintenance
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Solution Overview
Problem
Existing portable information handling systems face challenges in efficiently disconnecting battery power during maintenance, leading to potential shock or damage to electronic components due to residual power application.
Innovation Solution
A system and method that detects the removal of a housing keystone to automatically cut off battery power to the motherboard by using an embedded controller to manage power communication, transitioning the processor to an off state and commanding the battery to storage mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the housing is disassembled for maintenance service, then accessibility to internal components is improved, but battery power continues to be applied to processing components creating shock or damage risk
Solution Approach 1:
The system performs preliminary action by detecting keystone removal and automatically shutting down the processor and disconnecting battery power before the user fully disassembles the housing. This preliminary power disconnection eliminates the shock or damage risk to electronic components while maintaining ease of access for maintenance service.
2Object-affected harmful factors
If substantial disassembly is performed to disconnect battery power, then power disconnection is achieved, but servicing complexity increases
Solution Approach 1:
The system implements self-service by automatically detecting keystone removal and triggering the power shutdown sequence without requiring user intervention. The embedded controller autonomously manages the processor shutdown and battery disconnection, eliminating the need for users to perform complex disassembly procedures while ensuring power safety.
Solution Approach 2:
The system uses feedback by monitoring the keystone removal event and using this detection signal to automatically initiate the power disconnection sequence. This feedback mechanism ensures that power is disconnected at the appropriate moment based on the actual physical state of the housing, simplifying the servicing process while maintaining safety.
3Reliability
If the processor remains powered during disassembly, then operational status is maintained, but safety risk to components increases
Solution Approach 1:
The system performs preliminary shutdown of the processor immediately upon detecting keystone removal, before the disassembly process fully begins. This ensures that the processor transitions to an off state while maintaining reliable detection of the keystone event, thereby eliminating shock or damage risk to components.
Data Source
AI summary
A portable information handling system cuts off power from a battery when a keystone of the housing is removed to have an incomplete detection circuit, such as by removing a ground post from contact against a motherboard conductive pad. An embedded controller detects the incomplete detection circuit and in response receives power when powered down, detects a power state of a system processor, powers down the system processor when on, and then removes power communication from the battery by commanding the battery to a storage mode.