Secondary Battery Case Bonding for Simpler Cylindrical Assembly
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Solution Overview
Problem
Cylindrical secondary batteries have a complex manufacturing process due to a large number of parts and intricate structure, which complicates assembly and production efficiency.
Innovation Solution
The secondary battery design incorporates an upper case and a lower case that are bonded or coupled using protrusions, screw threads, or welding, with a waterproof member coating, and includes a heating cover layer to manage heat during assembly, reducing the number of parts and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional cylindrical battery structure with multiple parts is used, then structural integrity is maintained, but manufacturing process complexity increases
Solution Approach 1:
The upper case and lower case are merged into a single integrated case structure that accommodates the electrode assembly. The case includes a bottom wall, side walls, and an integrated opening structure, eliminating the need for separate upper and lower case components that would require complex assembly operations.
Solution Approach 2:
The case is segmented into functional regions including a bottom wall for support, side walls for containment, and an integrated opening structure for electrode assembly insertion. This segmentation allows each region to perform its specific function while maintaining overall structural integrity with simplified manufacturing.
2Stability of the object's composition
If multiple separate components are used for case assembly, then structural stability is improved, but assembly time increases
Solution Approach 1:
The upper case and lower case are combined into a single integrated case component that is formed as one piece. This eliminates the need for separate assembly operations to join multiple case components, significantly reducing assembly time while maintaining structural stability through the integrated design.
Solution Approach 2:
The case is pre-formed as a single integrated component with all structural features (bottom wall, side walls, opening structure) already in place before electrode assembly insertion. This preliminary formation eliminates the need for subsequent assembly operations to join case components, reducing assembly time while ensuring structural stability.
3Quantity of substance
If traditional case structure is used, then electrode assembly accommodation is achieved, but number of parts increases
Solution Approach 1:
The upper case, lower case, and side wall structures are merged into a single integrated case that accommodates the electrode assembly. This consolidation reduces the number of parts from multiple separate components to one unified structure, while the internal volume is optimized to fully accommodate the electrode assembly.
Solution Approach 2:
The integrated case serves multiple functions simultaneously: it provides structural support through the bottom wall, contains the electrode assembly through side walls, and facilitates assembly through the integrated opening structure. This multi-functionality reduces the need for separate components while maintaining adequate accommodation space.
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 design reduces the complexity of the manufacturing process and enhances assembly efficiency by minimizing parts and improving the coupling mechanism, while maintaining structural integrity and safety.
Implementation Method 1
One or more of the protrusions of the upper case and the lower case may be coated with a waterproof member
Implementation Method 2
A welding area may be formed at a portion where the protrusions of the upper case and the lower case are coupled to each other
Implementation Method 3
a heating cover layer formed on the back of the welding area may be included
Implementation Method 4
The bonded portion of the upper case and the lower case may comprise screw threads, the upper case and the lower case each comprising at least one of the screw threads
Data Source
AI summary
The present disclosure relates to a secondary battery. The secondary battery comprises: an electrode assembly; and a case accommodating the electrode assembly, wherein the case comprises an upper case having a terminal and a lower case adjacent to the upper case, and wherein the upper case and the lower case together comprise a bonded portion for bonding the upper case and the lower case to each other.