Secondary Battery Housing With Integrated Insulation and Rigidity
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Solution Overview
Problem
Existing secondary batteries face challenges in maintaining rigidity and insulation properties, especially in medium and large devices like electric vehicles and energy storage systems, where multiple cells are connected, leading to potential damage and performance degradation due to external forces and temperature changes.
Innovation Solution
The secondary battery design incorporates a housing with an insulating part protruding from the accommodating part to form an insulating layer between the electrode assembly and the container, using a die and punch to mold the insulating part in the metal sheet, ensuring rigidity and insulation through protrusions of various shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery uses a simple container structure without additional insulating components, then the device complexity is reduced, but the insulation property and rigidity are insufficient
Solution Approach 1:
The insulating part is integrated into the housing structure as a unified component rather than a separate element. The housing includes both the container and the insulating part formed as one piece, combining structural support and insulation functions into a single integrated component that protrudes into the accommodating part.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it provides mechanical support, thermal insulation, and structural rigidity. The insulating part that protrudes into the accommodating part not only insulates the electrode assembly but also reinforces the overall housing structure and maintains spatial relationships between components.
2Strength
If the battery housing is made from a single metal sheet without additional components, then the device complexity is minimized, but the rigidity and resistance to external forces are insufficient
Solution Approach 1:
The housing is divided into functionally distinct regions: the container portion that provides overall enclosure and the insulating part that protrudes into the accommodating part. This segmentation allows each region to be optimized for its specific function while maintaining structural integrity through their integrated formation.
Solution Approach 2:
The insulating part is strategically positioned within the accommodating part where it is most needed for both insulation and structural reinforcement. This localized addition of complexity only where necessary provides enhanced rigidity and force resistance in critical areas without unnecessarily complicating the entire housing structure.
3Reliability
If the insulating part is formed as a continuous solid structure, then the insulation property is maximized, but the manufacturing complexity and difficulty increase
Solution Approach 1:
The insulating part is formed with multiple protrusions distributed within the accommodating part rather than one large continuous structure. This segmentation into multiple smaller protrusions simplifies the molding process, allows for easier formation from the metal sheet, and facilitates manufacturing while still providing comprehensive insulation coverage.
Data Source
AI summary
The present disclosure relates to a secondary battery, and a device and method for manufacturing the secondary battery and is directed to providing a secondary battery in which rigidity can be increased and an insulation property can be secured, and a device and method for manufacturing the secondary battery. To this end, the present disclosure provides a secondary battery including an electrode assembly, and a housing provided with an accommodating part in which the electrode assembly is accommodated and an insulating part protruding from the accommodating part toward the electrode assembly.