Wheel Unit Battery Protection Under High-Temperature TPMS Operation
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Solution Overview
Problem
Existing tire-pressure monitoring systems (TPMS) face issues with battery malfunctions due to operation outside the specified temperature range, leading to radio-frequency communication failures and reduced service life, which results in negative client feedback and potential battery degradation.
Innovation Solution
A method for protecting the battery by transitioning the wheel unit to a low-power non-operational state when an operating parameter, such as temperature, exceeds a predetermined threshold, and reverting to a nominal power state when the parameter falls below another threshold, accompanied by integrity tests and warning messages to the central unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheel unit operates continuously in high temperature conditions, then the monitoring function remains active, but the battery integrity deteriorates and service life reduces
Solution Approach 1:
The wheel unit dynamically adjusts its operational state based on temperature conditions. When temperature exceeds the upper threshold, the system transitions from full operational mode to non-operational mode, adapting its behavior to environmental conditions to preserve battery integrity while maintaining monitoring capability when conditions are favorable
Solution Approach 2:
The system changes its operational parameters (power consumption level, transmission activity) in response to temperature parameter changes. By monitoring temperature and adjusting operational parameters accordingly, the system prevents battery degradation while maintaining essential functions during acceptable temperature ranges
2Reliability
If the wheel unit transitions to non-operational state to protect the battery, then battery integrity is preserved, but the monitoring and communication capability is reduced
Solution Approach 1:
The system employs periodic temperature monitoring and state transitions. The control unit continuously monitors temperature and periodically assesses whether threshold conditions are met, enabling the wheel unit to switch between operational states in a controlled, periodic manner that balances battery protection with information transmission
Solution Approach 2:
The system uses feedback from temperature sensors to control the operational state. The control unit receives temperature data, compares it against thresholds, and adjusts the wheel unit's operational state accordingly, creating a closed-loop control system that automatically responds to environmental conditions
3Productivity
If the wheel unit operates at nominal power consumption, then full monitoring and transmission functions are available, but power consumption increases battery degradation risk
Solution Approach 1:
The wheel unit dynamically adjusts its power consumption level based on temperature conditions. During acceptable temperature ranges, the system operates at nominal power consumption to provide full monitoring and transmission functions. When temperature exceeds thresholds, the system reduces power consumption by transitioning to non-operational state, thereby preserving battery energy
Data Source
AI summary
A method for protecting the battery of a wheel unit fitted to a wheel of a motor vehicle. The motor vehicle includes a central processing unit and the wheel unit includes at least a first sensor capable of measuring and of supplying an operating parameter of the wheel unit and a battery which supplies the wheel unit with power. The method including that the wheel unit transitions from an operational state to a non-operational state when the operating parameter reaches a predetermined upper threshold, and the wheel unit transitions from the non-operational state to the operational state when the operating parameter reaches a predetermined lower threshold.