Foldable Battery Module Switching for Voltage Imbalance Isolation
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Solution Overview
Problem
The integration of additional voltage level matching configurations in foldable electronic devices increases complexity and material costs, necessitating a more efficient control mechanism for multiple battery modules.
Innovation Solution
A foldable electronic device with a first and second battery module, connected via flexible printed circuit boards (FPCBs) and switching circuits, utilizes a control circuit to compare voltages and cut off power to faulty modules, thereby simplifying the system and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional voltage level matching configurations such as limiters are provided, then voltage level matching between battery modules is achieved, but device complexity and material cost increase
Solution Approach 1:
The battery management system automatically monitors voltage levels of multiple battery modules and performs self-balancing operations without requiring external limiters or additional voltage matching configurations. The system detects voltage differences and autonomously redistributes charge to achieve voltage level matching, eliminating the need for extra hardware components.
Solution Approach 2:
The battery management circuit performs multiple functions including voltage monitoring, charge control, and voltage level matching using a single integrated system. This multi-functional approach replaces what would traditionally require separate limiters and control circuits, reducing overall system complexity while maintaining reliable voltage matching.
2Reliability
If additional voltage level matching configurations such as limiters are provided, then voltage level matching between battery modules is achieved, but material cost increases
Solution Approach 1:
The system uses existing battery management circuits to perform voltage level matching through automated monitoring and control, eliminating the need to manufacture and assemble additional limiter components. This self-service approach reduces material costs while maintaining voltage matching reliability.
Solution Approach 2:
The voltage level matching function is merged into the existing battery management system rather than being implemented as a separate hardware component. This consolidation eliminates the need for additional limiters and reduces overall material costs while achieving the same voltage matching objective.
3Reliability
If switching circuits are used to control battery modules, then faulty modules can be isolated, but device complexity increases
Solution Approach 1:
Switching circuits are introduced as intermediary components between the battery management system and individual battery modules. These switches enable the system to isolate faulty modules without requiring complex reconfiguration of the entire power distribution network, achieving fault isolation with minimal added complexity.
Solution Approach 2:
The battery system is segmented into independently controllable modules with individual switching control. This segmentation allows the system to isolate only the faulty module while keeping other modules operational, achieving fault isolation capability without requiring complete system shutdown or complex centralized control.
Data Source
AI summary
A foldable electronic device is provided. The foldable electronic device includes a first housing, a hinge module, a second housing mutually rotatably connected with the first housing through the hinge module, a main substrate disposed in an internal space of the first housing, a first battery module disposed in the internal space of the first housing and including a first battery circuit substrate, a second battery module disposed in an internal space of the second housing and including a second battery circuit substrate, a first flexible printed circuit board (FPCB) electrically connecting the main substrate and the first battery circuit substrate, a second FPCB electrically connecting the first battery circuit substrate and the second battery circuit substrate, a first switching circuit configured to control an electrical connection between the first battery module and the main substrate, a second switching circuit configured to control an electrical connection between the second battery module and the main substrate, and a control circuit disposed on the first battery circuit substrate, wherein the control circuit is configured to control the first switching circuit or the second switching circuit based on a difference between a first voltage of the first battery module and a second voltage of the second battery module, to cut off power to the first battery module or the second battery module.