Electrode Plate Roller Structure for Uniform Uncoated Region Extension
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Solution Overview
Problem
The production efficiency of batteries is hindered by the risk of electrode plate breakage during the cold-pressing procedure due to uneven extension rates between coated and uncoated regions, leading to folds and potential fractures.
Innovation Solution
An electrode plate extension device comprising a first roller with a protrusion and a second roller with a groove, arranged in parallel, where the protrusion presses against the uncoated region to cause plastic deformation, flattening and extending it to match the coated region's extension rate, while a heating portion reduces residual stress for safer deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the uncoated region is extended to match the coated region's extension rate, then the risk of electrode plate breakage is reduced, but the device complexity increases due to the need for protrusion and groove structures
Solution Approach 1:
The invention applies local quality by creating a protrusion on the first roller and a corresponding groove on the second roller. These localized structural modifications concentrate the extension action specifically on the uncoated region of the electrode plate, allowing differential extension between coated and uncoated areas. This local structural differentiation enables the system to address the specific problem of uncoated region folding without requiring complex overall system redesign.
Solution Approach 2:
The protrusion-groove structure acts as an intermediary mechanism between the rollers and the uncoated region. The protrusion presses against the uncoated region while the groove provides support, creating a controlled deformation zone. This intermediary structure mediates the extension process, enabling safe plastic deformation that matches the extension rate of the coated region without directly applying complex forces to the entire electrode plate.
2Productivity
If plastic deformation is applied to the uncoated region to flatten folds, then the production capacity is improved, but the risk of damage to the uncoated region increases
Solution Approach 1:
The groove on the second roller provides beforehand cushioning by positioning itself to support the uncoated region before the protrusion applies pressing force. This pre-positioned support structure cushions the uncoated region during the plastic deformation process, preventing excessive stress concentration and potential damage while still enabling effective fold flattening and extension.
Solution Approach 2:
The invention utilizes parameter changes by controlling the dimensions and geometry of the protrusion and groove to achieve appropriate plastic deformation. By carefully designing the parameters of these structures (size, shape, position), the system enables controlled extension of the uncoated region to match the coated region's extension rate, achieving productive deformation without causing damage.
3Manufacturing precision
If the protrusion presses against the uncoated region to cause plastic deformation, then the extension rate consistency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention applies asymmetry by creating a protrusion on one roller and a corresponding groove on the other roller, rather than using symmetric structures. This asymmetric design allows the protrusion to apply pressing force while the groove provides support, creating a controlled deformation mechanism that achieves consistent extension rates. The asymmetric structure is simpler to manufacture than precision symmetric alternatives while achieving the required extension consistency.
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
This solution reduces the risk of electrode plate breakage, enhances production capacity, and improves battery production efficiency by ensuring consistent extension rates and reducing the risk of fractures during the cold-pressing process.
Implementation Method 1
the protrusion is configured to press against an uncoated region of the electrode plate to cause a plastic deformation of the uncoated region
Implementation Method 2
a heating portion reduces residual stress for safer deformation
Data Source
AI summary
An electrode plate extension device includes a first roller and a second roller. The first roller includes a first body and a protrusion. The protrusion is provided on an outer peripheral surface of the first body and extends in a circumferential direction of the first body. The second roller includes a second body and a groove. The groove is provided in an outer peripheral surface of the second body and extends in a circumferential direction of the second body. The first roller and the second roller are arranged in parallel, a gap for allowing an electrode plate to pass is formed between the first roller and the second roller, the protrusion is positioned corresponding to the groove, and the protrusion is configured to press against an uncoated region of the electrode plate to cause a plastic deformation of the uncoated region.