Secondary Battery Film Package In-Place Degas Method
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Solution Overview
Problem
The conventional method for manufacturing secondary batteries is costly due to the high equipment costs and energy consumption associated with using large vacuum chambers, making it difficult to produce large batteries at a low cost.
Innovation Solution
A method involving a film package where upper and lower sides of a laminate structure are covered with film materials, sealed at one end, and then bonded along side portions while pressing the middle portion to degas the internal space, eliminating the need for expensive vacuum chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vacuum chamber is used to degas the package, then the package can be effectively degassed, but the equipment cost and energy consumption increase significantly
Solution Approach 1:
The patent extracts the degassing function from the vacuum chamber environment and implements it directly within the package using an in-package degassing mechanism. This allows the package to be degassed without requiring expensive vacuum chamber equipment, thereby reducing energy consumption while maintaining effective degassing.
Solution Approach 2:
The package performs its own degassing function through an integrated degassing structure that enables gas removal without external vacuum equipment. The package becomes self-sufficient in the degassing process, eliminating the need for energy-intensive vacuum chambers.
2Reliability
If a vacuum chamber is used to degas the package, then the package can be effectively degassed, but the equipment cost increases
Solution Approach 1:
The patent removes the dependency on vacuum chamber equipment by extracting the degassing function and implementing it within the package structure itself. This simplifies the overall equipment requirements and reduces capital investment in expensive vacuum systems.
Solution Approach 2:
The patent employs a simple, cost-effective degassing structure that can be integrated into the package without requiring expensive, complex vacuum chamber equipment. The in-package degassing mechanism provides an economical alternative to costly vacuum systems.
3Device complexity
If film materials are sealed at one end and bonded at side portions while pressing the middle portion, then the package can be degassed without vacuum chambers, but the sealing process becomes more complex
Solution Approach 1:
The patent divides the sealing process into distinct sequential steps: first sealing one end of the overlapping film portions, then bonding the side portions while pressing the middle portion. This segmentation of the sealing process allows for effective degassing while maintaining manufacturing feasibility through clear, step-by-step instructions.
Solution Approach 2:
The patent performs preliminary sealing of one end before bonding the side portions. This preliminary action creates a sealed chamber that facilitates effective degassing during the subsequent bonding process, ensuring that gas is removed before final sealing occurs.
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 method reduces equipment costs and energy consumption, enabling the efficient and cost-effective manufacturing of secondary batteries, particularly large ones, by degassing without expensive vacuum chambers.
Implementation Method 1
pressing a middle portion of the overlapped film materials sequentially in the process direction to thereby degas an internal space between the film materials
Data Source
AI summary
A method for manufacturing a secondary battery having a film package by covering upper and lower sides of a laminate structure constituting a battery with a pair of film materials respectively and bonding the film materials together sequentially in a process direction from one end of the film materials to the other, the method including overlapping the film materials such that the laminate structure is sandwiched therebetween, and sealing one end of the overlapping part of the films, the one end being located at an upstream of the process direction, and bonding the overlapped film materials together at one or each of side portions thereof extending along the process direction sequentially in the process direction, while pressing a middle portion of the overlapped film materials sequentially in the process direction to thereby degas an internal space between the film materials, the middle portion being located between the side portions.