External Power Circuit for Vehicle Authentication When Battery Fails
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Solution Overview
Problem
Vehicles equipped with electronic key fobs for access and unlocking lack a reliable method to gain entry when the battery is dead, as current systems do not ensure authentication before granting access, potentially allowing unauthorized access.
Innovation Solution
A circuit that supplies power from an external source to the vehicle's authentication and unlocking modules, using a voltage detector and relay to connect the external power only when the battery is low, and requiring authentication from a wireless device to unlock the vehicle, ensuring secure access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical keys are used for vehicle access, then access is possible when battery fails, but security is reduced and convenience is worsened
Solution Approach 1:
The patent extracts the authentication functionality from the traditional mechanical key system and implements it through a wireless device with electronic authentication module. This allows the vehicle to maintain electronic security features while providing mechanical key-like access capability when the battery fails, eliminating the need for separate mechanical keys.
Solution Approach 2:
The wireless device serves multiple functions: it acts as both a conventional key for starting the vehicle and as an authentication credential for gaining access when the battery fails. The system provides universal access capability through a single electronic device rather than requiring separate mechanical and electronic keys.
2Reliability
If external power source is connected to provide power when battery fails, then access is enabled, but unauthorized access risk increases
Solution Approach 1:
The system performs preliminary authentication verification through the authentication module before enabling access when external power is connected. The wireless device must present valid authentication credentials before the system grants access, ensuring that power connection alone does not compromise security.
Solution Approach 2:
The system implements feedback control by continuously monitoring authentication status and power source conditions. The authentication module verifies credentials and provides feedback control signals to the power distribution system, ensuring that power is only directed to access components when both power availability and authentication validity are confirmed.
Data Source
AI summary
A system includes a first circuit, an authentication module, and an unlocking module. The first circuit is configured to supply power from a power source located outside a vehicle when a battery of the vehicle fails. The authentication module is configured to receive the power from the first circuit and to authorize access to the vehicle. The unlocking module is configured to receive the power from the first circuit and to unlock at least one of a hood, a door, and a trunk of the vehicle in response to the authentication module authorizing access to the vehicle.