Battery Low-Temperature Detection Using Ambient and Cell Sensing
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Solution Overview
Problem
Current battery string temperature monitoring in electronic devices is delayed and costly due to the need for multiple temperature sensors, which complicates the structure and reduces accuracy in low-temperature environment detection.
Innovation Solution
An electronic device low-temperature protection method that determines the presence of a low-temperature environment by considering both environmental temperature and battery temperature, using a processor to adjust operating conditions and prevent high power consumption or disable functions to protect the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is disposed on each battery in the battery string to monitor temperature in real time, then the reliability of temperature monitoring is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple temperature sensors into a single temperature sensing unit that measures the temperature of the battery string as a whole rather than individual batteries. This merging approach reduces the number of sensors from multiple to one, simplifying the structure while maintaining monitoring capability for the entire battery string.
Solution Approach 2:
The single temperature sensor serves as a universal monitoring device for the entire battery string, providing temperature data for all batteries in series. This multi-functional approach allows one sensor to perform what would traditionally require multiple sensors, reducing complexity while maintaining reliability.
2Measurement precision
If a temperature sensor is disposed on each battery in the battery string to monitor temperature in real time, then the accuracy of low-temperature detection is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple temperature sensing functions into a single sensor implementation, reducing the bill of materials and manufacturing cost. By sensing the overall battery string temperature rather than individual battery temperatures, the system achieves low-temperature detection capability with fewer components.
Solution Approach 2:
Instead of physically placing sensors on each battery, the system uses a single temperature measurement that represents the entire battery string, creating a simplified model of temperature distribution that is sufficient for low-temperature protection without the cost of multiple sensors.
3Device complexity
If only the battery temperature is used to determine low-temperature environment, then the device complexity is reduced, but the accuracy of low-temperature detection deteriorates due to temperature delay
Solution Approach 1:
The patent performs preliminary temperature sensing of the battery string environment before the actual battery temperature drops to critical levels. By monitoring the ambient temperature of the battery string housing, the system detects low-temperature conditions earlier than waiting for battery temperature to drop, compensating for the thermal inertia delay.
Solution Approach 2:
The patent introduces the battery string ambient temperature as an intermediary measurement that correlates with but leads the actual battery temperature. This intermediary parameter serves as an early warning indicator, allowing the system to take preventive action before the battery temperature itself reaches critical low levels.
Data Source
AI summary
An electronic device low-temperature protection method includes: obtaining, by an electronic device, an environmental temperature and a temperature of a battery of the electronic device; determining, by the electronic device based on the environmental temperature and the temperature of the battery, that the electronic device is in a low-temperature environment; and implementing, by the electronic device, low-temperature protection in response to the determined being in the low-temperature environment. According to the electronic device low-temperature protection method provided in this application, both the environmental temperature and the temperature of the battery are considered, and whether the electronic device is in a low-temperature state is detected based on the environmental temperature and the temperature of the battery.