Blister Package Structure to Protect Coin Cell Aversive Coatings
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Solution Overview
Problem
Existing packaging designs for coin cell batteries fail to effectively protect water-soluble aversive coatings from wear during transport, leading to potential transfer and loss of the coating's deterrent properties, which are crucial for preventing accidental ingestion by children.
Innovation Solution
A blister package design featuring cavities and protrusions that protect a water-soluble aversive coating, including standoff posts and truncated-cone shaped cavities, to maintain the coating's integrity during transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blister package directly contacts the battery surface during transport, then the packaging is simple and inexpensive, but the water-soluble aversive coating wears off and transfers to the package
Solution Approach 1:
The patent introduces an intermediary structure (standoff post or truncated-cone cavity) between the battery surface and the blister package to prevent direct contact. This mediator maintains a protective gap that prevents the water-soluble aversive coating from wearing off and transferring to the package, while still providing secure containment during transport.
Solution Approach 2:
The patent transitions from a two-dimensional flat packaging surface to a three-dimensional structured cavity with vertical depth. The truncated-cone cavity or standoff post creates a vertical dimension that elevates the battery above the package surface, ensuring the coating does not contact the package while maintaining secure positioning.
2Reliability
If the blister package uses a flat cavity design, then manufacturing is simple, but the coating cannot be protected from wear during transport
Solution Approach 1:
The patent incorporates the protective standoff structure or truncated-cone cavity design into the blister package mold during manufacturing. This preliminary action ensures that the protective gap is already in place before the battery is inserted, eliminating the need for additional assembly steps while maintaining coating protection during transport.
3Reliability
If the battery is allowed to move freely in the package, then packaging design is simple, but the coating may contact and wear on the package surface
Solution Approach 1:
The patent applies local quality by creating a specific geometric configuration (truncated-cone shape or standoff post position) that provides protective clearance exactly where the aversive coating is located on the battery surface. This localized approach ensures coating protection without requiring complex constraints throughout the entire package.
Data Source
AI summary
A blister package for an electrochemical cell having a water-soluble coating on at least one terminal. The package comprises a first plastic panel and a second plastic panel. The second plastic panel is secured to the first plastic panel such that a cavity is defined having a closed planar side opposite the open side and parallel with at least one of the first planar portion or the second planar portion. The cavity may include a substantially cylindrical sidewall that extends between the closed planar side and one of the first planar portion or the second planar portion surrounding the cavity. The cavity includes a standoff post having a distal end extending into the cavity and spaced away from the sidewall to define an unoccupied volume surrounding the standoff post and spaced apart from the other of the first plastic panel or the second plastic panel to define a battery-placement cavity.