Battery Cell Shell Structure for Low-Friction Electrode Encasing
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Solution Overview
Problem
The existing shell designs for battery cells make it inconvenient to assemble the electrode assembly, leading to a reduced yield rate of encasing.
Innovation Solution
A shell design featuring a frame with two opposite openings and end caps that seal these openings, increasing the operating space and allowing for easier assembly and observation of the electrode assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shell uses a conventional closed structure, then the structural strength is maintained, but the ease of assembly of the electrode assembly deteriorates
Solution Approach 1:
The shell is divided into a frame structure with multiple openings instead of a closed structure, segmenting the enclosing function across multiple components while facilitating easier insertion of the electrode assembly through the openings
Solution Approach 2:
The design transitions from a conventional closed shell to an open frame structure by adding spatial dimensions through multiple openings, allowing the electrode assembly to be inserted from the side rather than requiring top-down compression
2Ease of operation
If the frame is made more open to facilitate assembly, then the ease of operation improves, but the structural strength deteriorates
Solution Approach 1:
The frame is segmented into multiple sidewalls connected by connecting portions, distributing the structural load across multiple elements while maintaining openness for assembly
Solution Approach 2:
The frame utilizes a composite structure combining sidewalls and connecting portions made of metal materials, providing both strength and openness for assembly operations
3Productivity
If a single opening is used on the frame, then the device complexity is reduced, but the productivity of encasing deteriorates
Solution Approach 1:
The frame incorporates multiple openings instead of a single opening, segmenting the access points to allow simultaneous or sequential insertion of electrode assemblies, thereby increasing production capacity
Solution Approach 2:
The frame with multiple openings serves multiple functions: facilitating assembly of electrode assemblies, allowing observation of encasing status, and enabling efficient production workflows
Data Source
AI summary
A battery related shell, a battery cell, a battery, and an electrical device are disclosed. The shell includes a frame and two end caps. The frame includes two openings opposite to each other along a first direction. The two end caps are connected to two ends of the frame respectively along the first direction. The two end caps respectively seal the two openings. The two end caps and the frame together define an accommodation space configured to accommodate an electrode assembly. The two openings created on the frame make it convenient to put the electrode assembly into the shell, thereby reducing the risk that the electrode assembly is damaged by excessive friction between the electrode assembly and an inner side of the frame during encasing of the electrode assembly, and improving the yield rate of encasing of the electrode assembly.