EV Battery Lock Mechanism Sensing to Prevent Half-Locked Removal
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Solution Overview
Problem
Existing battery exchange systems rely on a single sensor to determine the lock state of the lock mechanism, which can lead to incorrect determinations during failures, potentially causing dangerous situations due to half-locked batteries being forcibly removed.
Innovation Solution
A battery attachment apparatus with dual lock mechanisms and sensors (lock switch and unlock switch) that operate in conjunction to accurately detect lock and unlock states, ensuring safe battery exchange by preventing half-locked conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used to detect lock state, then device complexity is reduced, but measurement precision and reliability deteriorate due to inability to accurately determine lock completion during failures
Solution Approach 1:
The lock detection system is segmented into multiple independent sensors: a first sensor detects lock completion during the locking operation, while a second sensor detects unlock completion during the unlocking operation. This segmentation allows each sensor to specialize in detecting specific operational states, improving overall detection accuracy without requiring a single complex sensor to handle all scenarios.
Solution Approach 2:
The system changes the detection parameters by using different sensors for different operational phases (locking vs. unlocking). The first sensor monitors the locking process completion, while the second sensor monitors the unlocking process completion. This parameter-based differentiation enables accurate detection of lock state by comparing the operational status of both sensors, resolving the ambiguity that occurs with single-sensor systems during failures.
2Device complexity
If a single sensor determines lock state, then device complexity is reduced, but reliability worsens due to potential incorrect determination during lock mechanism failures
Solution Approach 1:
The reliability is improved by segmenting the detection function into two separate sensors that monitor different aspects of the lock mechanism operation. The first sensor specifically monitors lock completion, while the second sensor specifically monitors unlock completion. This segmentation creates a more reliable system because the failure of one sensor does not compromise the entire detection system, and the combination of both sensor readings provides a more accurate determination of the actual lock state.
Solution Approach 2:
The system implements feedback by continuously monitoring the operational status of both the first and second sensors and using this information to determine the current lock state. The control unit processes feedback from both sensors to make an informed decision about whether the battery is properly locked or unlocked. This dual-feedback mechanism prevents incorrect determination even when one sensor fails, as the system can detect inconsistencies and prevent unsafe battery exchange operations.
3Measurement precision
If dual lock mechanisms with separate sensors are used, then measurement precision and reliability are improved, but device complexity increases
Solution Approach 1:
The complexity is managed through functional segmentation where the first sensor is dedicated to detecting lock completion and the second sensor is dedicated to detecting unlock completion. This segmentation simplifies the control logic because each sensor has a specific, well-defined detection task, making the overall system easier to implement and maintain despite having multiple sensors. The segmented approach avoids the need for a single complex sensor that would require handling multiple detection scenarios.
Solution Approach 2:
Both sensors are part of a universal detection system that works together to provide comprehensive lock state monitoring. The control unit processes information from both sensors universally to determine the lock state, regardless of which sensor is providing the active signal. This multi-functional approach allows the system to accurately detect lock state through multiple pathways, improving reliability while maintaining a unified control architecture that manages the complexity of having multiple sensors.
Data Source
AI summary
A battery attachment apparatus 1 of electric vehicle C according to the present disclosure includes: a first lock mechanism 30X and a second lock mechanism 30Y disposed at a first attachment position and a second attachment position of a storage part. A battery is stored, and configured to operate in conjunction with each other to fix the battery to the storage part, wherein the first lock mechanism 30X includes a first sensor 30cX configured to sense an operation of the first lock mechanism 30X and detect a lock completion of the battery based on an operation state of the first lock mechanism 30X. The second lock mechanism 30Y includes a second sensor 30cY configured to sense an operation of the second lock mechanism 30Y and detect an unlock completion of the battery based on an operation state of the second lock mechanism 30Y.