Battery Case Beading with Grip Release to Prevent Terminal Damage
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Solution Overview
Problem
Existing secondary battery manufacturing processes often result in damage to the side appearance and terminals during the formation of the beading part, leading to reduced quality and potential safety issues due to improper connection between the battery case and cap assembly.
Innovation Solution
An apparatus and method involving a gripper with first and second grip arms, a support part with a groove, and a pressurizing part to form a beading part on the case surface while minimizing contact and friction, using a controller to coordinate the gripper's grip release and the rotating inserting and support parts to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the gripper maintains continuous grip on the case during beading part formation, then the case position is stabilized, but damage occurs to the side appearance and terminals
Solution Approach 1:
The gripper releases its grip on the case before the beading part formation process begins. This preliminary action of releasing the grip prevents the gripper from interfering with the beading process and causing damage to the case appearance and terminals, while the case position is subsequently maintained by the support part
Solution Approach 2:
The support part with groove and seating part is positioned in advance to provide stable support to the case before the beading part formation. This pre-positioning ensures the case remains stable during the beading process without requiring continuous gripper contact, thereby preventing damage
2Reliability
If the pressurizing part applies high pressure to form the beading part, then the seal integrity is improved, but foreign matter is generated and quality is reduced
Solution Approach 1:
The pressurizing part applies pressure locally and uniformly to the case surface at the beading location, rather than applying diffuse pressure. This concentrated local pressure effectively forms the beading part for seal integrity while minimizing case deformation and foreign matter generation that would occur with uneven pressure distribution
Solution Approach 2:
The pressurizing part dynamically adjusts its contact with the case during rotation, maintaining optimal pressure throughout the beading process. This dynamic pressure application ensures consistent seal quality while preventing excessive pressure that could generate foreign matter
3Productivity
If the case rotates at high speed during beading part formation, then productivity is improved, but damage to terminals and side appearance increases
Solution Approach 1:
The gripper releases the case before rotation begins, and the support part is positioned in advance to provide stable support during high-speed rotation. This preliminary setup enables the case to rotate at higher speeds without the gripper causing damage to the terminals or side appearance through friction or interference
Data Source
AI summary
Provided are an apparatus and method for manufacturing a secondary battery. The apparatus for manufacturing a secondary battery may include an inserting part configured to support an upper portion of a case of the secondary battery, a pressurizing part configured to pressurize an outer surface of the case to form a beading part on the outer surface of the case during rotation of the case, a support part configured to support a lower portion of the case, and a gripper configured to selectively grip the case or release the grip of the case for rotation of the case.