Battery Temperature Sensing with Periodic Sleep Mode
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Solution Overview
Problem
Excessive temperatures can cause material decomposition and degradation in batteries, leading to diminished performance or catastrophic failure in battery-powered devices, for which existing technologies lack effective protection mechanisms.
Innovation Solution
A temperature sensing system that uses a sensor to monitor battery temperature, storing digital data with timestamps and determining the time-rate-of-change to trigger protective actions such as throttling or shutdown, and toggling between active and sleep modes to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous temperature monitoring is implemented, then battery safety and reliability are improved, but energy consumption increases
Solution Approach 1:
The system implements periodic temperature monitoring instead of continuous monitoring. The microcontroller enters sleep mode between measurement cycles, activating the temperature sensor and ADC only during active measurement periods. This periodic operation maintains battery safety monitoring while significantly reducing energy consumption compared to continuous operation.
Solution Approach 2:
The system uses feedback from temperature measurements to dynamically adjust monitoring frequency and trigger protective actions. When temperature exceeds threshold values or rate-of-change limits are detected, the system increases monitoring frequency or activates protective measures (throttling, shutdown). This feedback mechanism ensures safety while optimizing energy consumption based on actual battery conditions.
2Measurement precision
If temperature sensing and data storage operations are performed frequently, then detection precision is improved, but device complexity increases
Solution Approach 1:
The system uses the battery's own operational data (temperature readings, time-rate-of-change calculations) to automatically determine appropriate monitoring frequency and trigger protective actions. The microcontroller processes temperature data, compares it against thresholds, and autonomously decides when to increase monitoring or activate protection, eliminating the need for external complex control systems.
Solution Approach 2:
The system changes the monitoring parameter from simple temperature to temperature plus time-rate-of-change. By incorporating the rate of temperature change as an additional parameter, the system achieves better detection precision for thermal runaway risks without requiring multiple separate sensors or complex measurement systems.
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 prevents battery damage by monitoring temperature changes and initiating protective measures, ensuring operational safety and extending battery lifespan.
Implementation Method 1
a sensor senses the temperature of a battery and provides an electrical signal
Data Source
AI summary
Methods and apparatus are provided related to thermal protection of electrical batteries. A sensor senses the temperature of a battery and a corresponding digital signal is digitally derived. Date, time and temperature data are written to storage media. A time-rate-of-change of the battery's temperature is determined and used to establish operational periodicity. Stored digital data can be communicated to another entity, temperature or time-rate-of-change values used to trigger an alarm or system shut-down, and so on. Electronic circuitry toggles between an active mode and a power-conserving sleep mode in accordance with periodic operating schedule.