BEV Protection Plate Circuit for Short-Circuit Puncture Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional systems for detecting damage to battery electric vehicle (BEV) protection plates lack automatic puncture detection with local sensitivity tuning and spatial locating, often requiring costly capacitive sensors that reduce the plate's strength and lack sensitivity near supports.
Innovation Solution
A short circuit-based detection system using conductive tabs on the BEV protection plate that contact the battery housing, with a diagnostic device measuring voltage and a controller determining a short circuit when the voltage exceeds a threshold, providing notification of damage without physically inspecting the underside of the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If capacitive sensors are embedded within the BEV protection plate for puncture detection, then automatic puncture detection capability is provided, but the overall strength of the plate is reduced
Solution Approach 1:
The protection plate is divided into multiple sensing zones with conductive elements distributed across different regions. Each zone can independently detect punctures, allowing the plate to maintain structural integrity while providing comprehensive coverage through segmented sensing areas rather than a single embedded sensor array
Solution Approach 2:
The conductive elements serve dual functions: they form part of the electrical circuit for voltage measurement and simultaneously act as sensing elements for puncture detection. This multi-functionality eliminates the need for separate embedded sensors, maintaining plate strength while enabling automatic detection
2Extent of automation
If capacitive sensors are embedded within the BEV protection plate, then puncture detection is enabled, but the plate lacks local sensitivity tuning capability
Solution Approach 1:
Different regions of the protection plate have conductive elements with varying properties (such as different conductive ink patterns, trace geometries, or material compositions) that provide location-specific sensitivity. This allows critical areas to have higher sensitivity while non-critical areas have lower sensitivity, enabling local tuning without requiring separate sensor configurations
Solution Approach 2:
The electrical parameters (resistance, capacitance, trace width, spacing) of the conductive elements are varied across different zones of the plate to adjust sensitivity locally. By changing these parameters, the system achieves different sensitivity levels in different areas, allowing adaptation to local structural requirements
3Reliability
If conventional puncture detection systems are implemented, then damage detection is possible, but the system lacks spatial locating capability
Solution Approach 1:
The protection plate is divided into multiple sensing zones with conductive elements distributed across different regions. Each zone independently reports its status, enabling the system to detect not only that a puncture has occurred but also precisely which zone is affected, thereby providing spatial location information
Solution Approach 2:
The conductive elements act as intermediaries between the physical puncture event and the detection system. Each conductive element's electrical response provides information about both the presence and location of damage, serving as a spatial encoder that maps physical space to electrical signal space
4Strength
If no puncture detection system is provided, then the protection plate maintains full strength, but drivers must physically inspect the underside of the vehicle
Solution Approach 1:
The protection plate incorporates self-diagnostic capabilities through its conductive circuit elements that automatically detect and report punctures. The system serves itself by monitoring its own integrity through voltage measurements, eliminating the need for manual inspection while maintaining full plate strength
Solution Approach 2:
The manual mechanical inspection process is replaced by an electrical measurement system. Instead of physically examining the plate underside, the system uses voltage measurements across conductive elements to detect damage, substituting mechanical inspection with electrical sensing
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
Enables affordable and efficient detection of BEV protection plate damage, allowing for timely notification and maintenance without compromising the plate's strength or sensitivity, thus ensuring battery safety.
Implementation Method 1
receiving an indication of a force being applied to a battery electric vehicle (BEV) protection plate such that at least one conductive tab of a circuit of the BEV protection plate contacts a battery housing
Implementation Method 2
measuring, using a diagnostic device, a voltage of the battery housing, wherein the battery housing is conductive
Data Source
AI summary
Method and systems for determining a battery electric vehicle (BEV) protection plate has been damaged. A BEV protection plate includes a circuit. The circuit includes a plurality of conductive tabs. The BEV protection is separated from a battery housing by an opening. The conductive tabs extend from the circuit disposed on the BEV protection plate into the opening. A diagnostic device measures a voltage of the battery housing. A controller is in communication with the diagnostic device, determines a short circuit based on the measured voltage of the battery housing; and outputs to a display a notification that the BEV protection plate is compromised.