Battery Side-Mounted Protection Circuit Layout for Compact Electronics
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Solution Overview
Problem
The challenge of protecting batteries from overcharge, overdischarge, and overcurrent while maintaining compact size and high functionality in electronic devices is not adequately addressed by existing technologies.
Innovation Solution
The electronic device incorporates a protection circuit module (PCM) with a connection member and flexible printed circuit boards to manage electrical connections and protect the battery, while maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection circuit module is added to protect the battery from overcharge, overdischarge, and overcurrent, then battery safety and reliability are improved, but device complexity and space occupation increase
Solution Approach 1:
The protection circuit module is integrated with the battery assembly by disposing it along the side surface of the battery and overlapping over the connection member, merging multiple functions (protection, connection, electrical connection) into a compact integrated structure that reduces overall device complexity while maintaining safety functions
Solution Approach 2:
The connection member serves multiple functions: it provides mechanical support, establishes electrical connections between circuit boards, and acts as a substrate for mounting the protection circuit module, thereby reducing the need for separate components and simplifying the overall device structure
2Reliability
If a protection circuit module with multiple connection components is added, then battery protection functionality is improved, but the space occupied in the device increases
Solution Approach 1:
The protection circuit module is disposed in a vertical arrangement along the side surface of the battery rather than spreading horizontally, utilizing the vertical dimension to accommodate protection components without increasing the horizontal footprint of the device
Solution Approach 2:
The protection circuit module is positioned to overlap over the connection member, effectively nesting the protection circuit within the existing structural footprint of the connection components, thereby utilizing already-occupied space efficiently
Data Source
AI summary
According to certain embodiments, an electronic device comprising a housing; a first printed circuit board disposed in the housing; a second printed circuit board disposed in the housing; a battery disposed between the first printed circuit board and the second printed circuit board; a connection member disposed along one side surface of the battery, and electrically connecting the first printed circuit board and the second printed circuit board; a protection circuit module disposed along the one side surface of the battery and over the connection member; and a first flexible printed circuit board disposed adjacent to the protection circuit module and connected with the first printed circuit board or the second printed circuit board.