Pouch Forming Partition Plate Chamfer for Crack Prevention

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Solution Overview

Problem

The pouch forming apparatus faces durability issues due to pressure being applied to the central part of the pouch film, which is transferred to the partition plate, causing damage or deformation.

Innovation Solution

A chamfer part is formed at the lower end of the partition plate, which is connected to the die unit, and a blank holder with an inclined protrusion part is used to minimize the impact of pressure and prevent cracks, ensuring stable forming depth and reducing the risk of damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a partition plate is used to divide the forming groove, then the pouch film can be formed into multiple compartments, but the partition plate is damaged or deformed due to pressure transfer from the central part of the pouch film

Engineering Contradiction:

Improvemulti-compartment forming capabilityVSAvoidpartition plate durability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The partition plate is divided into multiple sections along its length, with recesses created at regular intervals. This segmentation allows the plate to flex and absorb pressure at specific points, preventing stress concentration and deformation while maintaining the multi-compartment forming capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Recesses are pre-formed in the partition plate at strategic locations where pressure from the pouch film central part would be transferred. These recesses act as cushioning elements that absorb and distribute the pressure before it reaches the main body of the partition plate, preventing damage and deformation.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Manufacturing precision

If pressure is applied to the central part of the pouch film during forming, then the pouch film can be properly formed into the electrode assembly-receiving part, but the pressure is transferred to the partition plate causing damage

Engineering Contradiction:

Improvepouch film forming precisionVSAvoidpartition plate strength

Core Design Contradiction:

Manufacturing precisionVSStrength

Solution Approach 1:

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The partition plate has non-uniform structure with recesses at specific locations rather than being uniformly solid throughout. This local modification creates zones of different stiffness, allowing pressure to be absorbed at recess locations while maintaining structural integrity in other areas.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20230282910A1Pouch Forming Apparatus

Publication Date: 2023.09.07 LG ENERGY SOLUTION LTD

AI summary

A pouch forming apparatus according to an embodiment of the present disclosure includes a die unit in which a forming groove is formed in a portion where a pouch film is disposed, a partition plate that divides the forming groove into at least two, and a pressing unit that presses the pouch film disposed on the die unit to form an electrode assembly-receiving part, wherein a chamfer part is formed at the lower end of the partition plate.