Battery Cell Side-Terminal Layout for Higher Energy Density
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Solution Overview
Problem
Current battery cell designs have a large occupied space, leading to low energy density and suboptimal performance due to wasted space and poor structural strength between battery cells.
Innovation Solution
The battery cell design features a casing with a peripheral wall and an end wall, where the electrode terminal is arranged on the peripheral wall and electrically connected to the electrode assembly, eliminating the need for end caps and busbar components, and allowing adjacent cells to connect directly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If end caps and electrode terminals are arranged at one end of the battery cell along the axial direction, then the electrical connection is achieved, but the axial size of the battery cell increases, occupying more space
Solution Approach 1:
The electrode terminal is moved from the traditional axial end position to the peripheral wall position, changing the spatial dimension of arrangement from axial direction to radial direction. This dimensional change allows the terminal to be arranged on the side surface of the peripheral wall, reducing the axial projection length while maintaining electrical connection functionality.
Solution Approach 2:
The casing is divided into a peripheral wall and an end wall, with the electrode terminal specifically arranged on the peripheral wall. This segmentation allows different parts of the casing to serve different functions: the end wall provides axial closure while the peripheral wall accommodates the terminal, optimizing the overall spatial layout.
2Ease of operation
If traditional battery cell structure with end caps and busbar components is used, then electrical connection is established, but the number of components increases, complicating assembly
Solution Approach 1:
The electrode terminal integrates multiple functions: it serves as both the electrical connection component and the structural support element mounted on the peripheral wall. This merging eliminates the need for separate end caps and busbar components, reducing the total number of parts and simplifying the assembly process.
Solution Approach 2:
The peripheral wall serves dual purposes: it provides the structural boundary of the battery cell housing and simultaneously serves as the mounting surface for the electrode terminal. This multi-functionality reduces the need for additional dedicated mounting structures, simplifying overall design and assembly.
3Reliability
If more components are used for electrical connection, then connection reliability is improved, but the occupied space increases, reducing energy density
Solution Approach 1:
The electrode terminal utilizes a thin-walled structure mounted on the peripheral wall, achieving reliable electrical connection with minimal material volume. This approach maintains connection reliability while occupying minimal space within the battery cell, thereby preserving energy density.
Data Source
AI summary
A battery cell battery cell includes a casing, an electrode assembly, and an electrode terminal. The casing includes a peripheral wall and an end wall, wherein the peripheral wall is arranged around the end wall; along an extension direction of the peripheral wall, at least one end of the peripheral wall is provided with the end wall. The electrode assembly is housed within the casing. The electrode terminal is arranged on the peripheral wall, wherein the electrode terminal is electrically connected to the electrode assembly.