Power Receiver Control for Safe High-Power USB Charging
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Solution Overview
Problem
Existing power receiving apparatuses that do not properly support the USB standard may not ensure safety during high-power transactions due to inadequate authentication and power control processes, leading to potential safety concerns and inefficiencies.
Innovation Solution
A power receiving apparatus with a control unit that determines whether the power transmitting apparatus meets a predetermined condition before receiving higher power levels, ensuring safety by skipping authentication for low-power operations and performing authentication prior to receiving higher powers, and allowing users to select power reception options in case of authentication failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If C-AUTH authentication communication is performed regardless of power supply magnitude, then safety is improved, but power reception speed deteriorates when low power is requested
Solution Approach 1:
The patent applies dynamics by making the authentication process adaptive based on operation state. When the power receiving apparatus is in a sleep state or requests low power, the authentication process is skipped or simplified. When transitioning to an active state or requesting high power, full authentication is performed. This dynamic adjustment resolves the contradiction by optimizing the authentication process according to actual power needs.
Solution Approach 2:
The patent changes the parameter of authentication strictness based on power level parameters. For low power requests, the authentication parameter is relaxed or omitted. For high power requests, the authentication parameter is enforced strictly. This parameter-based adaptation allows the system to maintain safety when needed while improving speed when power levels are low.
2Reliability
If authentication is performed for all power levels, then safety is ensured, but operational efficiency deteriorates
Solution Approach 1:
The patent applies partial action by performing authentication only when necessary - specifically when high power is requested or when transitioning from low-power to high-power states. For low-power operations, authentication is partially skipped or simplified. This selective approach ensures safety for high-power operations while maintaining operational efficiency for low-power scenarios.
3Speed
If power receiving apparatus skips authentication for low power, then operational speed is improved, but safety may be compromised
Solution Approach 1:
The patent segments the power reception process into different states with different authentication requirements. Low-power states (sleep, standby) use simplified or skipped authentication, while high-power states (active, charging) enforce full authentication. This segmentation allows the system to optimize for speed in low-power scenarios while maintaining safety in high-power scenarios.
Data Source
AI summary
A power receiving apparatus controls a power receiving unit to receive a first power from the power transmitting apparatus without performing a determination process of determining whether or not the power transmitting apparatus meets a predetermined condition in a case where the power receiving apparatus is in a first operation state. The power receiving apparatus performs the determination process of determining whether or not the power transmitting apparatus meets the predetermined condition before the power receiving unit receives a second power higher than the first power from the power transmitting apparatus in a case where the power receiving apparatus is in a second operation state. The power receiving apparatus controls the power receiving unit to receive the second power from the power transmitting apparatus in a case where the power receiving apparatus is in the second operation state and the power transmitting apparatus meets the predetermined condition.