Battery Package Structure for Hermetic Low-Resistance Mounting
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Solution Overview
Problem
Existing battery packaging technologies face challenges in efficiently extracting power while ensuring hermetic sealing and reducing the risk of short circuits and positional displacement of batteries, especially when surface-mounted on substrates.
Innovation Solution
A battery package design featuring an insulating substrate with a recessed portion, a frame portion, and a conductive sheet that electrically connects to both the upper and lower electrodes of the battery, providing a hermetic seal and reducing resistance through a wide connection area, while preventing short circuits and positional displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a battery is surface-mounted on a substrate using existing packaging technologies, then the battery can be integrated into electronic devices, but the power extraction efficiency is insufficient and resistance is high
Solution Approach 1:
The conductive sheet extends in the planar dimension rather than using vertical wire bonds, creating a wide connection area that reduces resistance while maintaining surface-mount compatibility. The conductive sheet lies flat on the substrate surface, transforming the connection geometry from point-to-point to area-to-area contact.
Solution Approach 2:
The conductive sheet serves multiple functions: it acts as an electrical connector between battery electrodes and external terminals, provides mechanical support and positioning for the battery, and enables efficient power extraction through its extended surface area. This multi-functionality resolves the contradiction by integrating connection and support roles into a single element.
2Reliability
If existing battery packaging structures are used, then the battery can be mounted on substrates, but hermetic sealing is compromised and short circuit risk increases
Solution Approach 1:
The insulating substrate acts as an intermediary barrier between conductive elements, providing electrical isolation that prevents short circuits while allowing hermetic sealing. The substrate's insulating properties mediate between the need for electrical connections and the need for isolation, resolving the contradiction by enabling sealing without creating conductive paths that could cause shorts.
Solution Approach 2:
The packaging structure segments conductive and insulating functions into separate components: the insulating substrate provides isolation, the conductive sheet provides connection, and the battery provides power. This segmentation allows each component to optimize its specific function without compromising the others, achieving both hermetic sealing and short circuit prevention.
3Reliability
If conventional battery mounting methods are used, then the battery can be integrated into circuits, but positional displacement occurs and connection stability decreases
Solution Approach 1:
The conductive sheet merges electrical connection and mechanical positioning functions into a single integrated component. The sheet's extended area provides both electrical pathways and physical constraints that prevent battery displacement, resolving the contradiction by combining connection stability and positional stability into one unified structure.
Solution Approach 2:
The conductive sheet's geometry self-provides both electrical connection and mechanical restraint. The sheet's extended area naturally creates friction and physical barriers that prevent battery movement while maintaining electrical contact, enabling the structure to self-stabilize without additional positioning components.
Data Source
AI summary
A wiring conductor includes a first electrode located on a bottom surface of a recessed portion, a second electrode located on a first surface between a frame portion and the recessed portion, a first external electrode located on a second surface, and a second external electrode located on the second surface and electrically connected to the second electrode. A conductive sheet is electrically connected to the second electrode and extends over an opening of the recessed portion above the first surface.