Battery Cell Sizing Rollers With Air Cooling Against Spring Back
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Solution Overview
Problem
The existing sizing roller systems for battery cells face challenges in maintaining a high folding quality due to spring back, as they heat up during the folding process, leading to decreased sizing effectiveness and increased installation costs, especially for longer cells where multiple rollers are needed, which slows down the folding process.
Innovation Solution
A sizing roller apparatus that incorporates inclined rollers with air spray nozzles to cool the rollers, spraying air between them to quickly reduce temperature and prevent spring back, allowing for improved folding quality and reduced roller count while maintaining process speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple sizing rollers are arranged in series to prevent spring back, then folding quality is improved, but installation cost increases and process speed decreases
Solution Approach 1:
The patent applies pneumatic cooling by introducing cooled air through nozzles to the sizing rollers during the folding process. This allows a single roller to maintain its sizing effectiveness continuously without heating up, eliminating the need for multiple rollers arranged in series and thereby maintaining high process speed while ensuring folding quality.
Solution Approach 2:
The patent changes the temperature parameter of the sizing roller by introducing cooled air through nozzles. This parameter change (maintaining low temperature) prevents the roller from losing its sizing effect due to heating, allowing continuous operation at high speed with a single roller instead of requiring multiple rollers.
2Manufacturing precision
If multiple sizing rollers are used to prevent spring back, then folding quality is improved, but installation cost increases
Solution Approach 1:
The patent introduces a pneumatic cooling system with nozzles that supply cooled air to the sizing roller. This allows a single roller to perform the sizing function effectively without heating up, replacing the need for multiple rollers and thereby reducing installation cost and device complexity while maintaining folding quality.
Solution Approach 2:
The sizing roller cools itself through the pneumatic cooling system during operation. The roller maintains its own low temperature state continuously, preventing heat accumulation and eliminating the need for multiple rollers, thus reducing installation cost while ensuring folding quality.
3Reliability
If sizing rollers are used to press the folding portion, then spring back is prevented, but the rollers heat up and sizing effect decreases
Solution Approach 1:
The patent uses pneumatic cooling by introducing cooled air through nozzles directly to the sizing roller during operation. This continuously removes heat from the roller, maintaining its low temperature and sizing effectiveness while it presses the folding portion to prevent spring back.
Solution Approach 2:
The patent actively controls the temperature parameter of the sizing roller by introducing cooled air during the pressing operation. This parameter change ensures the roller maintains low temperature and high sizing effect while preventing spring back, solving the contradiction between reliability and temperature.
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 effectively suppresses spring back and enhances folding quality by cooling the rollers, improving the sizing effect and reducing installation costs by allowing for fewer rollers and maintaining high process speed.
Implementation Method 1
spraying air to the plurality of sizing rollers
Implementation Method 2
spraying air into the spaces between the rollers while pressing a folding portion inward
Data Source
AI summary
A disclosed sizing roller apparatus for a folding process of a battery cell includes: a table fixing and supporting a battery cell; a base plate disposed on a side of the table; a plurality of sizing rollers disposed on the base plate and each having a rotation axis, which is inclined inward toward a folding portion of the battery cell, to press the folding portion of the battery cell in contact with the folding portion; and a plurality of air spray nozzles disposed on the base plate and spraying air to the plurality of sizing rollers.