Recessed Battery Cell Terminals for Higher Packing Density
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Solution Overview
Problem
Conventional battery cell designs face challenges in increasing energy density due to protruding electrode terminals that occupy space and complicate assembly, reducing the utilization rate of space within the battery and lowering energy density.
Innovation Solution
The design incorporates a housing with a recess to accommodate electrode terminals of adjacent battery cells, allowing for electrical connection without external confluence components, thereby reducing terminal size and simplifying assembly while improving space utilization and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrode terminals protrude from the housing surface, then electrical connection is achieved, but space utilization decreases and energy density is reduced
Solution Approach 1:
The electrode terminal is nested within a recess formed in the housing surface. The recess receives and accommodates the electrode terminal, allowing the terminal to be housed within the battery cell volume rather than protruding outward. This nesting approach maintains electrical connection functionality while optimizing space utilization and improving energy density.
Solution Approach 2:
The housing surface is modified by creating a recess that changes the two-dimensional surface profile into a three-dimensional feature. This dimensional change allows the electrode terminal to be positioned within the housing volume rather than extending beyond the housing surface, effectively utilizing the third dimension (depth) to solve the space utilization problem.
2Reliability
If conventional electrode terminal design is used, then electrical connection is established, but assembly complexity increases
Solution Approach 1:
The housing structure is merged with the electrode terminal accommodation function by integrating a recess directly into the housing. This combines the housing's structural role with the terminal housing function, eliminating the need for separate terminal holders or external confluence components, thereby simplifying assembly.
Solution Approach 2:
External confluence components and terminal holders are extracted from the battery cell design. By removing these additional components and integrating the terminal accommodation function directly into the housing, the overall device complexity is reduced and assembly is simplified.
Data Source
AI summary
Embodiments of the present application provide a battery cell, a method and a system for manufacturing the battery cell, a battery, and an electrical apparatus. The battery cell includes a housing, an electrode component, a first electrode terminal, and a second electrode terminal. An outer surface of the housing includes a first surface and a second surface oppositely arranged along a first direction, and two third surfaces oppositely arranged along a second direction, each of the third surfaces is connected to the first surface and the second surface, the housing is provided with a recess recessed relative to the first surface, and at least one end of the recess along the second direction extends to the third surface. An electrode component is accommodated within the housing.