Battery Power Maintenance Control for Low-Level Device Testing
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Solution Overview
Problem
Electronic devices with Li-ion batteries experience rapid voltage drops and capacity degradation, leading to malfunctions due to unexpected battery level drops, especially at low temperatures, necessitating a method to maintain a stable battery level during performance testing.
Innovation Solution
An electronic system with a test function block in the memory to monitor battery levels and generate control signals, coupled with a power maintenance device to manage power supply, ensuring the battery level remains within a set low range during testing, allowing simultaneous high-power operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the battery is discharged below a certain level to test device performance, then the testing accuracy is improved, but the battery voltage drops rapidly and causes malfunctions
Solution Approach 1:
An external power maintenance device is introduced as an intermediary between the battery and the device under test. This device monitors battery voltage and automatically supplements power when voltage drops below a threshold, ensuring stable operation during low-battery testing while preventing malfunctions caused by excessive discharge
Solution Approach 2:
The system implements a feedback mechanism where the test function block continuously monitors battery voltage levels and communicates with the power maintenance device. When voltage drops are detected, the system automatically adjusts power supplementation to maintain voltage within the acceptable range, creating a closed-loop control system
2Measurement precision
If the battery level is maintained at a low level for testing, then malfunction verification is improved, but the battery capacity degrades faster
Solution Approach 1:
The power maintenance device provides partial power supplementation only when and where needed - specifically when battery voltage drops below the threshold during testing. This selective intervention allows the battery to experience low-level conditions necessary for malfunction testing while preventing excessive discharge that would accelerate capacity degradation
Solution Approach 2:
The system prepares for potential voltage drops by having the power maintenance device ready to supplement power immediately when voltage approaches the threshold. This preemptive power cushioning prevents the battery from entering dangerous discharge levels that would cause permanent damage
3Adaptability or versatility
If the battery operates at low temperature and low level, then real-world condition testing is improved, but voltage drops accelerate
Solution Approach 1:
The power maintenance device acts as a mediator that compensates for the accelerated voltage drop caused by low temperature conditions. By monitoring voltage in real-time and providing supplemental power when needed, it enables testing under harsh thermal conditions without the battery reaching failure levels too quickly
Data Source
AI summary
An electronic system may include an electronic device and a power maintenance device. The electronic device may include a battery and a memory. The memory may include a test function block configured to monitor a level of the battery to generate a control signal for maintaining the level of the battery within a range of a set low level. The power maintenance device may control an electrical connection between an external power source and the battery based on the control signal.