Battery Cell End Cover Plastic Member With Reinforced Through-Hole Ribs
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Solution Overview
Problem
The challenge in battery manufacturing is the low yield rate and high production difficulty of battery components, particularly due to deformation during demolding, which affects the efficiency and integrity of plastic parts.
Innovation Solution
A plastic part with a body and reinforcing members, including arc-shaped ribs, enhances structural strength around through holes, reducing deformation and facilitating smooth demolding, while maintaining a thin structure to improve energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the plastic part is made thinner to improve energy density, then the volume ratio decreases and energy density increases, but the structural strength decreases and deformation during demolding increases
Solution Approach 1:
The patent applies local quality by adding reinforcing members (ribs) specifically around through holes where deformation occurs during demolding. This localized reinforcement strengthens the thinnest and most vulnerable areas of the plastic part without increasing the overall thickness, thus maintaining energy density while preventing deformation at critical locations.
Solution Approach 2:
The reinforcing members are designed into the plastic part structure before demolding occurs. This preliminary structural preparation ensures that when demolding forces are applied, the reinforced areas around through holes already have enhanced strength to resist deformation, preventing yield rate reduction.
2Strength
If reinforcing members are added to increase structural strength, then deformation during demolding is reduced, but the overall thickness and volume of the plastic part increase
Solution Approach 1:
The reinforcing members are strategically positioned only around through holes where deformation is most likely to occur during demolding, rather than uniformly distributing reinforcement throughout the entire plastic part. This localized approach provides necessary structural strength at critical areas while minimizing the overall volume increase.
Solution Approach 2:
The patent applies partial reinforcement only where needed (around through holes) rather than excessive uniform reinforcement across the entire part. This partial action approach provides sufficient strength to prevent deformation during demolding while avoiding unnecessary volume increase in areas that do not require reinforcement.
3Ease of manufacture
If the plastic part structure is simplified to reduce manufacturing complexity, then production difficulty decreases, but the ability to prevent deformation during demolding is reduced
Solution Approach 1:
The plastic part is segmented into functional zones: thin-walled areas for energy density and reinforced areas around through holes for demolding precision. This segmentation allows different regions to serve different purposes - the majority of the part remains thin and simple, while specific critical areas receive targeted reinforcement to prevent deformation during ejection.
Solution Approach 2:
The structure transitions from uniform simplicity to localized complexity, where reinforcing members are added only at specific locations (around through holes) that require enhanced precision during demolding. This maintains overall manufacturing simplicity while providing local precision where needed.
Data Source
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AI summary
A plastic member (23), a battery cell (20), a battery (100), and an electric device, relating to the technical field of batteries. The plastic member (23) comprises: a body (231) which is plate-shaped, wherein the body (231) is provided with a first through hole (202), and the first through hole (202) passes through the body (231) along the thickness direction; and first reinforcing members (232a) which are arranged on the body (231) and protrude from the surface of the body (231), wherein the first reinforcing members (232a) are located around the first through hole (202) and close to the first through hole (202).