Battery Cell Encapsulation Layout for Higher Energy Density
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Solution Overview
Problem
The challenge of improving energy density in batteries is hindered by the large space occupied by the battery head, which limits the compactness and thinning of electronic products.
Innovation Solution
An electrochemical apparatus design with a battery cell shell featuring a first encapsulation area and a second encapsulation area, where the first distance from the electrode assembly is greater than the second, reducing the size of the battery head and allowing space for other components, and an adapter structure facilitating connection between the electrode assembly and terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery head occupies large space to accommodate traditional electrode terminal structures, then the structural integrity and electrical connection are ensured, but the energy density of the battery is reduced
Solution Approach 1:
The patent transitions from a traditional planar electrode terminal structure to a three-dimensional folded structure. The electrode terminal includes multiple folded portions that extend in different spatial directions, utilizing vertical and lateral dimensions to achieve compact packaging while maintaining sufficient electrical connection area and structural integrity.
Solution Approach 2:
The folded portions of the electrode terminal are arranged in a nested configuration where each folded section is positioned within or adjacent to the previous fold. This nesting approach allows the terminal structure to occupy minimal space while maintaining its functional dimensions for electrical connection.
2Volume of stationary object
If the battery cell shell is reduced in size to improve energy density, then the occupied space is reduced, but the space for accommodating other components and adapter structures is limited
Solution Approach 1:
The battery cell shell is divided into distinct functional zones: a first encapsulation area dedicated to accommodating the electrode terminal and adapter structure, and a second encapsulation area for other components. This segmentation allows optimized spatial arrangement where each zone serves its specific function without interfering with others, enabling compact overall design while maintaining component accessibility.
Solution Approach 2:
Different regions of the battery cell shell are designed with different characteristics. The first encapsulation area provides enhanced protection and accommodation space for the electrode terminal assembly, while the second encapsulation area is optimized for other components. This localized differentiation allows the shell to meet diverse functional requirements within a compact overall volume.
Data Source
AI summary
An electrochemical apparatus includes an electrode assembly, a battery cell shell, and an electrode terminal. The battery cell shell includes a shell body and an encapsulation portion, the encapsulation portion includes a first encapsulation area and a second encapsulation area, an end portion of the first encapsulation area facing away from the shell body has a first distance from the electrode assembly, and an end portion of the second encapsulation area facing away from the shell body has a second distance from the electrode assembly, the first distance being greater than the second distance. Since the first distance is greater than the second distance, the size of a head of a battery cell is reduced, and a side of the second encapsulation area facing away from the shell body can be used for avoiding other components, which is conducive to improving the energy density of the electrochemical apparatus.