Battery Moulding Heating Arrangement Lip Formation
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Solution Overview
Problem
Conventional battery component casting methods often result in premature solidification, leading to lip formations around the perimeter of cast components, which can cause short circuits when assembled into battery packs, as the molten metal cools unevenly, especially in areas with reduced cross-sectional areas or far from the metal source.
Innovation Solution
An apparatus with a molten metal feed trough and mould block featuring a heating arrangement that maintains specific areas of the mould cavity at an elevated temperature relative to the average operational temperature of the mould block, ensuring uniform solidification and preventing lip formations by slowing down cooling in critical areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water cooled mould blocks are used to cool the molten lead, then the casting process efficiency is improved, but lip formations occur around the perimeter of the mould cavity due to premature solidification
Solution Approach 1:
The patent applies local quality by providing heating means at specific locations within the mould block, particularly at remote portions or sections with reduced cross-sectional area. This creates a non-uniform temperature distribution where certain areas are heated to higher temperatures than others, preventing premature solidification in critical zones while maintaining overall cooling efficiency for productivity.
Solution Approach 2:
The patent changes the temperature parameter locally within the mould block by introducing heating means that elevate the temperature of specific regions above the average operational temperature. This parameter change prevents the molten metal from solidifying prematurely in remote or thin-walled sections, eliminating lip formations while preserving the cooling function for efficient casting.
2Loss of time
If the mould cavity walls are cooled rapidly, then the casting cycle time is reduced, but the molten metal solidifies before settling horizontally, creating lip formations
Solution Approach 1:
The patent applies local quality by differentiating the thermal treatment of different mould cavity regions. Heating means are positioned at remote portions or sections with reduced cross-sectional area to prevent premature solidification, while other areas maintain rapid cooling. This localized thermal management ensures reliable casting without lip formations in critical zones, eliminating short circuit risks.
3Adaptability or versatility
If sections with reduced cross-sectional area are cast, then the component design flexibility is improved, but these sections cool much more rapidly, causing distinct lip formations
Solution Approach 1:
The patent applies local quality by targeting heating means at specific problem areas within the mould cavity, particularly sections with reduced cross-sectional area. These heated zones maintain elevated temperatures that prevent premature solidification, allowing the molten metal to settle properly even in thin-walled or remote sections, thus eliminating lip formations while preserving design flexibility.
Solution Approach 2:
The patent applies preliminary action by pre-heating specific sections of the mould cavity before the molten metal arrives. This anticipatory heating ensures that when the metal flows into remote or thin-walled sections, the temperature is sufficient to prevent immediate solidification, allowing proper settling and eliminating the need for post-casting corrections.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus ensures that battery components are cast with a uniform surface profile, reducing the risk of short circuits by maintaining the molten metal in a liquid state until it settles horizontally, thus eliminating lip formations and ensuring consistent assembly without clearance issues.
Implementation Method 1
a heating arrangement adjacent to the or each mould cavity, which in use maintains at least part of the or each mould cavity at an elevated temperature relative to the average operational temperature of the mould block
Implementation Method 2
a cooling arrangement which in use cools the mould block; The molten lead flows over the weir, into the cavities and solidifies
Data Source
AI summary
An apparatus for moulding battery components including a molten metal feed trough, a mould block adjacent to the feed trough, a weir between the feed trough and each cavity and a supply for feeding molten metal to the feed trough. The mould block has at least one mould cavity and a cooling arrangement which cools the mould block, and the mould block is provided with a heating arrangement adjacent to the or each mould cavity. In use, the heating arrangement maintains at least part of the, or each, mould cavity at an elevated temperature relative to the average operational temperature of the mould block.