Lithium Ion Battery Electrode Assembly with Recessed Spaces for Curved Devices
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Solution Overview
Problem
Existing lithium ion secondary batteries fail to efficiently utilize accommodating space in electronic devices with curved or uneven shapes, leading to reduced battery capacity and usage time due to shape restrictions and protrusions.
Innovation Solution
A lithium ion secondary battery design featuring a stacked electrode assembly with concavely recessed spaces and protrusions, allowing for the insertion of electronic apparatus protrusions, and using insulating members and connecting components to maximize space utilization, enabling the battery to fit various shapes and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a typical flat or pouch-shaped secondary battery is manufactured, then the manufacturing process is simplified and production is standardized, but the battery cannot adapt to curved or uneven spaces in electronic apparatuses, leading to wasted accommodating space
Solution Approach 1:
The battery is divided into multiple modules, each with a specific shape designed to fit into particular spaces within the electronic apparatus. These modular units can be arranged in different configurations to adapt to curved or uneven accommodating spaces, solving the contradiction between adaptability and structural complexity by breaking down the battery into manageable, adaptable segments
Solution Approach 2:
The battery structure incorporates flexible or adjustable components that can adapt their shape or position within the accommodating space. This dynamic capability allows the battery to conform to curved or uneven spaces while maintaining a relatively simple base structure that can be configured in multiple ways
2Adaptability or versatility
If protrusions are formed in the case to accommodate electronic parts, then electronic components can be integrated, but the accommodating space for the battery is reduced and not appropriately utilized
Solution Approach 1:
The battery modules are designed to nest around or within the protrusions formed for electronic parts. The battery structure incorporates cavities or recesses that accommodate these protrusions, allowing the battery to effectively utilize the remaining space while the electronic components are integrated into the overall apparatus structure
Solution Approach 2:
The battery case is designed with varying local properties - some areas are shaped to accommodate electronic protrusions while other areas maintain optimal shape for battery placement. This localized adaptation allows integration of electronic parts without significantly compromising the overall battery accommodating space
3Length of moving object
If a thin lithium ion secondary battery is developed to reduce thickness, then down-sizing and weight lightening are achieved, but the energy density per volume is lowered when using conventional cylindrical or rectangular designs
Solution Approach 1:
The battery design transitions from conventional two-dimensional flat or cylindrical shapes to a three-dimensional modular structure that efficiently utilizes available space in all dimensions. This dimensional optimization allows thin profile while maintaining high volume energy density through optimal spatial arrangement of battery modules
Solution Approach 2:
The battery modules incorporate curved or rounded shapes that more efficiently pack into the accommodating space compared to sharp rectangular corners. This curvature optimization reduces wasted space and improves volume utilization, maintaining energy density while achieving reduced thickness
Data Source
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AI summary
The present invention relates to a lithium ion secondary battery, and more particularly, to a lithium ion secondary battery which makes the best use of an accommodating space in electronic apparatus in which a secondary battery is accommodated or mounted to maximize a performance of the battery. A secondary battery includes an electrode assembly in which a plurality of pocketing anode bodies and a plurality of cathode bodies are alternately stacked, in which a concavely recessed space is formed in the electrode assembly, and the space may be formed in the plurality of pocketing anode bodies and the plurality of cathode bodies excluding a cathode body disposed at the lowest end of the electrode assembly.