Battery Protection Circuit Module Package Integration
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Solution Overview
Problem
Conventional battery protection circuits are large in size and complex to mount, requiring additional processes and occupying excessive space due to the use of protection ICs, FETs, resistors, and capacitors on printed circuit boards, which complicates integration and mounting in battery packs.
Innovation Solution
A battery protection circuit module package is designed with a terminal lead frame and a device package that includes a substrate with a protection IC, FET, and passive devices, mounted using surface mounting technology without a printed circuit board, featuring external and internal connection terminals for easy integration and size reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional protection circuits use protection IC, FET, resistors, and capacitors on a printed circuit board, then the circuit functionality is complete, but the size becomes excessively large and mounting becomes complex
Solution Approach 1:
The patent merges the protection IC, FET, resistors, and capacitors into a single integrated protection circuit module. This consolidation eliminates the need for separate mounting of multiple discrete components on a PCB, thereby simplifying the manufacturing process while maintaining complete circuit functionality.
Solution Approach 2:
The integrated protection circuit module serves multiple functions simultaneously - overcharge protection, overdischarge protection, overcurrent protection, and temperature monitoring - all within a single compact unit. This multi-functionality replaces what previously required multiple separate components and complex interconnections.
2Reliability
If protection IC, FET, resistors, and capacitors are mounted on a printed circuit board, then the circuit is functional, but the occupied space becomes excessively large
Solution Approach 1:
By combining all protection circuit components into a single integrated module, the patent dramatically reduces the total occupied space while preserving all necessary protection functions. The compact design eliminates the space required for a PCB and discrete component mounting areas.
Solution Approach 2:
The protection circuit module is designed to be nested within the battery pack structure itself, utilizing available space efficiently. The module can be positioned in unused cavities or alongside battery cells, maximizing space utilization without compromising functionality.
3Ease of manufacture
If discrete components are mounted on a printed circuit board, then the circuit can be assembled, but additional mounting processes and wire connections are required
Solution Approach 1:
The integration of all components into a single module eliminates multiple discrete mounting steps. The module can be installed as one unit using simple connection methods such as snap-fits, adhesives, or minimal soldering, thereby streamlining the assembly process and improving manufacturing productivity.
Solution Approach 2:
The patent extracts the protection circuit from the complex PCB mounting process and presents it as a self-contained module. This extraction removes the need for intricate wire bonding, PCB fabrication, and multiple component placement operations, significantly simplifying the overall manufacturing workflow.
Data Source
AI summary
Provided is a battery protection circuit module package capable of easily achieving high integration and size reduction. The battery protection circuit module package includes a terminal lead frame including a first internal connection terminal lead and a second internal connection terminal lead provided at two edges of the terminal lead frame and electrically connected to electrode terminals of a battery bare cell, and a plurality of external connection terminal leads provided between the first and second internal connection terminal leads and serving as a plurality of external connection terminals, and a device package including a substrate mounted on the terminal lead frame to be electrically connected to the terminal lead frame, and providing a battery protection circuit device thereon.