Pouch Battery PTC Device Fixing with Photocurable Adhesive
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Solution Overview
Problem
The manual application of tape to pouch type batteries is burdensome and prone to variability in adhesion strength and position due to human error, lacking an automated process for securing devices or circuits.
Innovation Solution
Incorporation of a photocurable adhesive to fix the PTC device and lead plate to the pouch, eliminating the need for manual taping by using a UV-hardened insulating resin, which secures the electrode tabs and lead plate within the pouch, ensuring consistent adhesion and automation of the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual taping is used to secure devices or circuits to pouch type batteries, then the battery can be assembled, but the process is burdensome and adhesion strength and position vary due to human error
Solution Approach 1:
The patent replaces the manual mechanical taping process with a photocurable adhesive system. The adhesive is applied in liquid form and then cured using UV light irradiation, transforming the mechanical manual operation into a photochemical process that can be automated and provides consistent adhesion without human error.
Solution Approach 2:
The patent changes the state of the adhesive from liquid to solid through photocuring. The adhesive is applied in a liquid state to ensure proper spreading and positioning, then UV light irradiation transforms it into a solid state for strong, consistent adhesion. This parameter change enables both ease of application and reliable bonding.
2Productivity
If manual taping is used to secure the PTC device and lead plate, then the components can be fixed, but the operation is time-consuming and labor-intensive
Solution Approach 1:
The patent replaces time-consuming manual taping operations with automated photocuring. The adhesive application and UV curing process can be performed automatically without manual intervention, significantly reducing assembly time and increasing productivity while eliminating the loss of time associated with manual operations.
Solution Approach 2:
The adhesive is applied to the pouch surface before the PTC device and lead plate are positioned. This preliminary action allows the components to be easily positioned and then quickly fixed through UV curing, streamlining the entire assembly process and reducing total assembly time compared to manual taping methods.
3Manufacturing precision
If tape is used to secure components, then the components are fixed, but adhesion positions and strength vary according to operator differences
Solution Approach 1:
The patent replaces manual positioning and taping with automated adhesive application and UV curing. The liquid adhesive can be precisely applied to specific locations on the pouch, and the UV curing process uniformly cures the adhesive, ensuring consistent adhesion position and strength without variations caused by different operators.
Solution Approach 2:
The photocurable adhesive system allows for precise control of adhesion parameters. The liquid state enables precise positioning, and the UV curing process provides uniform transformation to solid state, ensuring consistent adhesion strength and position. This eliminates the variability inherent in manual taping while maintaining process simplicity.
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 simplifies the manufacturing process, enhances adhesion quality, and ensures consistent adhesion strength and position, eliminating the need for manual taping and reducing human error, thereby improving the efficiency and reliability of pouch type battery assembly.
Implementation Method 1
a photocurable adhesive may be on the PTC device and may fix the PTC device to an upper portion of the planar part
Implementation Method 2
The photocurable adhesive may include a first photocurable adhesive on the planar part, and a second photocurable adhesive covering an upper portion of the first electrode tab, the PTC device and the lead plate
Data Source
AI summary
A pouch type battery, including: an electrode assembly; a pouch accommodating the electrode assembly; a first electrode tab electrically connected to the electrode assembly, the first electrode tab extending outside of the pouch; a positive temperature coefficient (PTC) device electrically connected to the first electrode tab, the PTC device being fixed to the pouch by a photocurable adhesive; and a lead plate electrically connected to the PTC device.