Parallel Battery Discharge Current Control via Temperature Sensing
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Solution Overview
Problem
Electronic devices with multiple batteries face challenges in independently controlling discharge currents to maintain stability and usability, especially when temperature abnormalities occur, leading to reduced performance and potential system failures.
Innovation Solution
An electronic device with a first and second battery, each connected to a current control module and a sensor module, measures temperatures and adjusts discharge currents based on reference conditions to maintain a stable total current supply, ensuring continued operation and usability even under abnormal temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple batteries are integrated and controlled as a single battery, then the device can operate with equal current discharge from all batteries, but the system cannot independently control discharge current from each battery when temperature abnormalities occur
Solution Approach 1:
The patent divides the integrated battery system into separate controllable units by providing individual current control modules for each battery. This segmentation enables independent monitoring and control of discharge currents from each battery, allowing the system to detect temperature abnormalities in specific batteries and adjust their discharge currents independently while maintaining overall system operation.
2Reliability
If the total discharged current is reduced to maintain battery stability, then the electronic device can operate with limited functions, but the device performance and usability are degraded
Solution Approach 1:
The patent applies local quality control by adjusting discharge currents specifically for batteries exhibiting temperature abnormalities rather than uniformly reducing current from all batteries. This allows the system to maintain high performance through batteries operating normally while providing targeted current reduction only to problematic batteries, thus preserving overall device performance while ensuring battery stability.
3Reliability
If individual current control modules are added for each battery, then independent control of discharge current is achieved, but the device complexity increases
Solution Approach 1:
The patent implements a universal current control architecture where identical current control modules are used for each battery, allowing the same control logic and circuit design to be replicated across multiple batteries. This modular universal approach enables independent control of each battery while avoiding the need to design unique control circuits for each battery, thereby reducing overall system complexity.
Data Source
AI summary
An electronic device may include a first battery, a second battery connected in parallel with the first battery, a first current control module configured to control a first discharge current of the first battery, a second current control module configured to control a second discharge current of the second battery, a sensor module configured to sense a temperature of the first battery and a temperature of the second battery, a memory, and a processor operatively connected to the first current control module, the second current control module, the sensor module, and the memory. The processor may measure the temperature of the first battery and the temperature of the second battery by using the sensor module, identify whether at least one reference condition is satisfied, based on the temperature of the first battery and the temperature of the second battery, control the first discharge current of the first battery by using the first current control module when the at least one reference condition is satisfied, and control the second discharge current of the second battery by using the second current control module. Various other embodiments may be possible.