Vehicle Battery System Theft Prevention via Current Limiting
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Solution Overview
Problem
Conventional motor vehicles lack effective theft-prevention systems that can prevent the starting of an internal combustion engine without disrupting other electrical loads, and existing solutions often require complex activation and deactivation processes.
Innovation Solution
A battery system with a switching unit that includes a current sensor and actuatable switches to limit or interrupt battery current when it exceeds a prescribed value, preventing engine start while allowing other loads to remain operational, and can be controlled via a mobile device for convenience and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery is isolated from the vehicle electrical system to prevent theft, then theft prevention is improved, but other electrical loads cannot operate
Solution Approach 1:
The battery system is segmented into multiple battery modules, each with independent switching units. This allows selective isolation of specific modules while keeping others operational, enabling theft prevention without completely cutting off power to essential loads.
Solution Approach 2:
Different switching units can be configured with different current limits tailored to specific load requirements. Critical loads receive sufficient current while non-essential loads are restricted, achieving localized control over power distribution for both security and operational needs.
2Reliability
If a switch isolates the battery to prevent engine starting, then theft prevention is improved, but the switch requires complex activation and deactivation processes
Solution Approach 1:
The switching unit automatically monitors battery current and compares it against preset limits. When theft is detected (current exceeds limit without proper authentication), the system self-activates the blocking function without requiring user intervention, simplifying the overall operation.
Solution Approach 2:
The system continuously monitors battery current and provides feedback to the control unit. This real-time feedback enables automatic detection of theft attempts and automatic activation of protection mechanisms, eliminating complex manual activation processes.
3Reliability
If the battery current is limited to prevent engine starting, then theft prevention is improved, but the system must completely interrupt current which affects other loads
Solution Approach 1:
Instead of binary on/off current control, the system adjusts current parameters dynamically. The switching unit modulates current flow to maintain levels sufficient for essential loads while dropping below thresholds required for engine starting, achieving theft prevention through parameter optimization rather than complete interruption.
Solution Approach 2:
The system transitions from static current isolation to dynamic current management. The switching units can rapidly adjust current levels in response to different load requirements and threat levels, providing adaptability that maintains power to essential systems while preventing theft.
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
The system effectively hampers theft by preventing engine start without switching off other loads, meeting automotive industry standards and allowing user-friendly remote operation.
Implementation Method 1
a current sensor for measuring a battery current flowing through the battery system
Implementation Method 2
the at least one switch and the current sensor interact such that the battery current is limited to a prescribed maximum value, or the battery current is interrupted
Data Source
AI summary
A battery system (10) for use on a vehicle electrical system (50) of a motor vehicle, comprising a negative pole (21), a positive pole (22), a battery module (5) and a switching unit (60) that has at least one actuatable switch and a current sensor (65) for measuring a battery current (IB) flowing through the battery system (10) is disclosed. The switching unit (60) is operable in a safety mode in which the at least one switch and the current sensor (65) interact such that the battery current (IB) is limited to a prescribed maximum value or is interrupted for a prescribed maximum period of time if the battery current (IB) exceeds a prescribed limit value and hence starting of the motor vehicle is prevented.