Multi-Voltage Charging Access Control for 12V System Protection
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Solution Overview
Problem
In vehicle electrical systems, there is a risk of damaging the 12V electrical system when attempting to jump start using a 24V source, and existing solutions lack a safe and simple method to ensure correct voltage matching for charging.
Innovation Solution
A multi-voltage charging apparatus with a housing containing separate compartments and access doors for 12V and 24V charging terminals, featuring a door release circuit that senses the applied voltage and selectively unlocks the corresponding compartment door, preventing incorrect voltage connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a 24V source is used to jump start a 12V electrical system, then the vehicle can be started, but the 12V electrical system can be damaged
Solution Approach 1:
The system performs preliminary voltage detection through the voltage sensing terminal before allowing access to charging terminals. The door release circuit detects the external voltage level and proactively prevents incorrect connections by keeping the appropriate access door locked, eliminating the risk of damage before it can occur.
Solution Approach 2:
The voltage sensing terminal and door release circuit act as intermediaries between the external power source and the charging terminals. This intermediary system detects voltage levels and controls door access accordingly, preventing direct harmful connections while enabling safe charging operations.
2Ease of operation
If access to charging terminals is always available, then charging operations are simple, but incorrect voltage connections can occur
Solution Approach 1:
The system performs preliminary voltage detection through the voltage sensing terminal before allowing access to charging terminals. The door release circuit detects the external voltage level and proactively prevents incorrect connections by keeping the appropriate access door locked, eliminating the risk of damage before it can occur.
Solution Approach 2:
The system automatically detects the external voltage level and self-regulates access to the appropriate charging terminal. The door release circuit autonomously determines which door should be unlocked based on voltage detection, eliminating the need for manual selection and preventing operator errors.
3Reliability
If separate compartments for 12V and 24V terminals are provided, then voltage matching is ensured, but device complexity increases
Solution Approach 1:
The charging apparatus is segmented into separate first and second compartments, each housing charging terminals for different voltage levels. This physical segmentation ensures that 12V and 24V charging operations are isolated, preventing incorrect connections while maintaining clear organizational structure.
Solution Approach 2:
The system merges the voltage detection function, door control mechanism, and compartment structure into an integrated system. The door release circuit combines voltage sensing, logic processing, and mechanical actuation to control access to both compartments, reducing overall system complexity through functional integration.
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
Ensures safe and correct voltage matching for charging, preventing damage to the 12V system by physically controlling access to the appropriate charging terminal based on the sensed external charging voltage, thereby facilitating safe jump-starting operations.
Implementation Method 1
a voltage sensing terminal... configured to sense a charging voltage applied to the voltage sensing terminal
Data Source
AI summary
A charging apparatus includes a charging terminal, a ground terminal, and a coupling circuit coupled to the charging terminal. The coupling circuit is configured to sense a charging voltage applied to the charging terminal and to selectively couple the charging terminal to a first charging node in response to a first voltage being applied to the charging terminal, and to selectively couple the charging terminal to a second charging node in response to a second voltage being applied to the voltage sensing terminal, the second voltage being different from the first voltage.