Charger Current Mismatch Detection in IHS Power Distribution
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Solution Overview
Problem
Information handling systems face issues in accurately determining the amount of current drawn from a power supply, which can lead to problems with the charger's components, such as faulty or improperly installed resistors, affecting the power distribution system.
Innovation Solution
A battery management unit sends a request for a specific current to an embedded controller, which then communicates with a charger to determine the actual current provided, comparing it to the requested amount and alerting if it falls outside a tolerance range, indicating potential issues with charger components like resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the charger provides current based on voltage measurement across a resistor, then the current can be determined, but the resistor may be faulty or improperly installed leading to inaccurate measurements
Solution Approach 1:
The system implements feedback by comparing the requested current amount with the actual current amount measured through the resistor. The embedded controller receives both values and determines whether they match within an acceptable range, enabling detection of resistor faults through this closed-loop verification mechanism.
Solution Approach 2:
The power distribution system performs self-diagnosis by automatically comparing requested and actual current values without external intervention. The embedded controller autonomously detects mismatches and generates alerts, allowing the system to monitor its own component health and identify resistor issues independently.
2Reliability
If the system continuously monitors current to detect mismatches, then reliability is improved, but device complexity increases due to additional monitoring requirements
Solution Approach 1:
The embedded controller performs multiple functions: it manages power distribution, monitors current measurements, compares requested vs. actual current values, and generates alerts. By consolidating these functions in a single controller rather than adding separate monitoring hardware, the system achieves high reliability without proportionally increasing complexity.
Solution Approach 2:
The embedded controller autonomously performs monitoring and comparison tasks without requiring external monitoring equipment. The system self-diagnoses current mismatches and generates alerts independently, reducing the need for additional complex monitoring infrastructure while maintaining high reliability.
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
This method ensures timely detection of current mismatches, allowing for prompt alerts and potential repairs or replacements, thereby maintaining the reliability of the power distribution system in information handling systems.
Implementation Method 1
a second amount of current based at least on the request for the first amount of current and based at least on a voltage measurement across a resistor of the charger
Data Source
AI summary
In one or more embodiments, one or more systems, one or more methods, and/or one or more processes may: send, by a battery management unit (BMU) of a battery of an information handling system (IHS), a request for a first amount of current to an embedded controller (EC) of the IHS; provide, by the EC, the request for the first amount of current to a charger of the IHS; receive, by the charger, the request; provide, by the charger, a second amount of current based at least on the request and based at least on a voltage measurement across a resistor of the charger; determine, by the BMU, a measurement of the second amount of current; provide, by the BMU, the measurement to the EC; determine, by the EC, that the measurement does not match the first amount of current; and provide, by the EC, an alert.