Battery Protection Module Package with Integrated Lead Frame
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Solution Overview
Problem
Conventional battery protection module packages (PMPs) are large in size and volume due to separate regions for external and internal terminals, leading to inefficiencies in protecting batteries from overdischarge, overcharge, and overcurrent, and increasing production costs.
Innovation Solution
A compact battery protection module package design featuring a lead frame with external terminals, a printed circuit board stacked on the lead frame, and internal terminals, with components like a protection integrated chip, field effect transistor, resistors, and capacitors mounted using surface mount technology, reducing size and volume by integrating these elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate regions are used for external terminals and internal circuits in conventional battery PMP, then connection parts can be provided, but the package size and volume become large
Solution Approach 1:
The patent merges the external terminal region and internal circuit region into a single integrated structure. The lead frame serves both as the external terminal support and as the internal circuit board, eliminating the need for separate regions and reducing overall package volume while maintaining connection capabilities.
Solution Approach 2:
The lead frame is designed to perform multiple functions simultaneously: it provides external terminals for battery connection, serves as the internal circuit board for mounting protection components, and establishes electrical connections between all components. This multi-functionality eliminates the need for separate dedicated regions.
2Ease of manufacture
If connection parts are made excessively long in conventional battery PMP, then external terminals can connect to internal circuits, but the overall size increases
Solution Approach 1:
The patent eliminates long connection parts by merging the terminal and circuit functions into the lead frame itself. The connection paths are integrated directly into the lead frame structure, reducing connection length while maintaining electrical connectivity.
3Reliability
If conventional battery PMP structure is used, then protection function is provided, but production costs increase due to larger size
Solution Approach 1:
The patent reduces production costs by merging multiple components and functions into the lead frame structure. This integration reduces the total component count, simplifies assembly processes, and decreases material usage, all while maintaining the battery protection function through the integrated protection circuit components.
Data Source
AI summary
Disclosed is a battery protection module package (PMP). The battery PMP according to an embodiment of the present invention includes a lead frame provided with a plurality of external terminals thereon, a printed circuit board stacked on the lead frame, and a plurality of internal terminals, a protection integrated chip (IC), a field effect transistor (FET), resistors, and capacitors disposed on the printed circuit board and electrically connected to each other, wherein the resistors and the capacitors are mounted on a pattern of the printed circuit board using surface mount technology (SMT), and wherein the plurality of internal terminals are electrically connected to the plurality of external terminals.