Curable Composition With Tunable Waiting Time for Battery Module Injection
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Solution Overview
Problem
Existing curable compositions face challenges in controlling curing rates and securing waiting times, especially in battery module manufacturing, where viscosity control is difficult due to high filler content and narrow injection spaces, leading to issues like back discharge and process inefficiencies.
Innovation Solution
A curable composition that allows for adjustable waiting times and rapid curing after the waiting period, suitable for low viscosity and high filler formulations, minimizing device load and ensuring processability in battery module manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the curable composition is injected into a narrow tube-shaped injection device, then the composition can be delivered to the battery module, but the viscosity of the composition increases due to curing reaction, applying load to the injection device
Solution Approach 1:
The patent introduces a waiting time period before injection where the curable composition is prepared in advance without significant viscosity increase. This preliminary action allows the composition to be ready for injection at optimal viscosity levels, preventing excessive load on the injection device during the actual injection process.
Solution Approach 2:
The patent controls the viscosity parameter of the curable composition by adjusting the curing reaction rate. By modifying chemical composition and curing conditions, the viscosity is maintained at appropriate levels during waiting time and injection, resolving the contradiction between maintainability and device load.
2Productivity
If the curing reaction proceeds quickly, then productivity is improved, but the waiting time before injection must be kept short, making it difficult to complete pre-processes like purging
Solution Approach 1:
The patent implements a waiting time period as a preliminary action before injection and curing. During this waiting time, pre-processes such as purging can be completed without interrupting the curing reaction. The curing reaction is designed to proceed at a controlled rate during this period, allowing time for preparatory operations while maintaining overall productivity.
Solution Approach 2:
The curing process is divided into distinct periods: a waiting time period for pre-processing, an injection period, and a rapid curing period. This periodic action allows different operations to occur at appropriate stages, balancing productivity requirements with the need for waiting time.
3Reliability
If the curable composition is formulated with high filler content for high thermal conductivity, then thermal performance is improved, but controlling the curing rate becomes more difficult and securing waiting time is harder
Solution Approach 1:
The patent controls the curing rate by adjusting chemical parameters such as catalyst concentration, curing agent ratio, and temperature conditions. Even with high filler content, these parameter changes allow precise control of the curing reaction rate, maintaining both thermal conductivity and manufacturability.
Solution Approach 2:
The curable composition is formulated as a composite material combining filler particles with a carefully designed polymer matrix and curing system. This composite structure allows the filler to provide thermal conductivity while the matrix and curing agents control the reaction kinetics, enabling both high thermal performance and manageable curing rates.
4Ease of operation
If the viscosity is kept low for easy injection, then injection processability is improved, but the contact probability of main agent and curing agent is reduced, making curing rate control more difficult
Solution Approach 1:
The patent optimizes the balance between viscosity and component contact probability by adjusting chemical parameters such as solvent content, molecular weight of polymers, and curing agent distribution. These parameter changes allow the composition to maintain low viscosity for injection while ensuring sufficient contact between reactive components for controllable curing.
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 composition provides controlled curing rates and waiting times, reducing device load and enhancing process efficiency in battery module manufacturing by allowing for rapid curing post-waiting time, thus improving tact time and reducing back discharge.
Implementation Method 1
the main agent resin and the curing agent of the main agent resin are physically contacted, so that the mixing point is generally the curing start point, and when the curing reaction proceeds, the viscosity of the composition usually increases
Implementation Method 2
when the curing reaction proceeds, the viscosity of the composition usually increases
Data Source
Figure 1
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AI summary
The present application may provide a curable composition capable of securing a waiting time after curing start, efficiently controlling the relevant waiting time according to the application, and also controlling a curing rate after the waiting time to suit the application, and a battery module, a battery pack or an automobile comprising a cured product thereof.