Pouch Battery Sealing Tool Insulation for Uniform Heat
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Solution Overview
Problem
The existing sealing tools for pouch casing-type secondary batteries face issues with non-uniform temperature distribution due to heat dissipation, leading to inconsistent sealing quality and prolonged processing times.
Innovation Solution
An apparatus with a sealing tool featuring thermal insulation coating layers on its lateral surfaces, paired sealing blocks, and a heating member to maintain uniform temperature and improve sealing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the sealing tool is configured to discharge heat to the outside through its surface, then the sealing tool can be cooled down, but a large amount of time is required to heat and seal the next pouch casing
Solution Approach 1:
The sealing tool is divided into multiple independent heating zones (first heating zone and second heating zone) that can be controlled separately. This allows different regions of the sealing tool to be heated to different temperatures or heated at different rates, enabling the sealing surfaces to maintain optimal temperature while minimizing heat loss to non-sealing areas, thus reducing the time required for heating the next pouch casing.
Solution Approach 2:
The heating members are positioned to provide localized heating to specific sealing surfaces of the pouch casing. The first heating member heats the first sealing surface while the second heating member heats the second sealing surface independently. This localized heating approach ensures that heat is applied precisely where needed, reducing overall heat loss and accelerating the heating process for subsequent pouch casings.
2Reliability
If the sealing tool heats the region where the electrode lead is disposed to a relatively higher temperature, then sealing of the lead region is achieved, but the sealing portion is not sealed with a uniform temperature
Solution Approach 1:
The sealing tool employs different heating strategies for different regions: the first heating zone provides higher temperature to the lead sealing region to ensure reliable sealing of the electrode lead, while the second heating zone provides appropriate temperature to the pouch casing sealing region. This localized differential heating achieves both reliable lead sealing and uniform temperature distribution across the entire sealing surface, resolving the contradiction between sealing reliability and temperature uniformity.
Solution Approach 2:
The sealing tool is segmented into multiple heating zones with independent temperature control. The first heating zone is dedicated to sealing the electrode lead region and can be controlled to provide higher temperature, while the second heating zone seals the pouch casing and maintains uniform temperature. This segmentation allows each zone to be optimized for its specific sealing requirements, achieving both high reliability and temperature uniformity.
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 ensures uniform sealing quality by minimizing heat dissipation, reducing processing time, and maintaining consistent temperature distribution across the sealing tool.
Implementation Method 1
a thermal insulation coating layer positioned on a lateral surface of the sealing tool
Implementation Method 2
a heating member positioned in the sealing block and configured to heat the sealing block
Data Source
AI summary
The apparatus for sealing a secondary battery includes a sealing tool configured to seal the outer peripheral surface of a pouch casing. Moreover, the apparatus has a thermal insulation coating layer positioned on a lateral surface of the sealing tool, a pair of sealing blocks configured to heat the sealing tool or support the pouch casing, and a heating member positioned in the sealing block and configured to heat the sealing block. The thermal insulation coating layers may be positioned on the outer surface of the sealing tool that is not in contact with the pouch casing, thereby minimizing a degree to which heat is diffused to the outside. The thermal insulating coating layers may also have different thicknesses, thereby uniformizing the temperature of the sealing tool and sealing quality.