Dual-Battery Power Switching for Outdoor Temperature Extremes
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Solution Overview
Problem
Outdoor mounted electronic devices face challenges in maintaining consistent power supply across a wide temperature range due to the limitations of single batteries, which may not perform effectively at extreme temperatures.
Innovation Solution
Incorporating two batteries with different temperature operating ranges, a low temperature battery and a high temperature battery, and a temperature sensor to dynamically switch power sources based on ambient conditions, ensuring optimal performance across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single battery is used to power outdoor devices, then the device structure remains simple, but the device cannot maintain sufficient power supply across extreme temperature ranges
Solution Approach 1:
The power supply system is segmented into multiple battery cells, each optimized for specific temperature ranges. The device includes a first battery cell for low temperature operation and a second battery cell for high temperature operation, allowing the system to adapt to different thermal conditions by selecting the appropriate cell.
Solution Approach 2:
The battery selection mechanism dynamically switches between different battery cells based on real-time temperature conditions. The processing circuitry monitors temperature and automatically selects the appropriate battery cell, making the power supply system adaptive rather than static.
2Reliability
If batteries are selected for optimal performance at specific temperatures, then power reliability improves, but the device requires multiple battery cells increasing complexity
Solution Approach 1:
The system incorporates temperature sensing that provides feedback to the processing circuitry, which then selects the appropriate battery cell based on the measured temperature. This closed-loop control ensures reliable power supply by continuously monitoring conditions and adjusting battery selection accordingly.
Solution Approach 2:
The battery management system automatically selects and switches between battery cells based on temperature conditions without requiring manual intervention. The processing circuitry autonomously monitors temperature and manages power supply selection, making the system self-regulating.
3Reliability
If a single battery is used, then manufacturing and assembly are simpler, but the device cannot operate reliably across wide temperature variations from -40°C to 46°C
Solution Approach 1:
The power supply is divided into specialized battery cells with different thermal characteristics. Each cell is designed and optimized for specific temperature ranges, allowing the manufacturer to select appropriate cells for different environmental conditions while maintaining assembly processes.
Solution Approach 2:
Different battery cell parameters (chemistry, construction, thermal properties) are selected based on target temperature ranges. This allows manufacturers to optimize each cell for its intended operating conditions while maintaining standardized assembly procedures for the overall device.
Data Source
AI summary
An example outdoor mounted device includes a first battery configured to operate at a low temperature range that at least includes negative 20 Celsius; a second battery configured to operate at a high temperature range; a temperature sensor; and processing circuitry configured to: determine, based on data received from the temperature sensors, a current temperature; responsive to determining that the current temperature is within the low temperature range, cause one or more components of the computing device to operate using electrical energy sourced from the first battery; and responsive to determining that the current temperature is within the high temperature range, cause the one or more components of the computing device to operate using electrical energy sourced from the second battery.