Electrode Tab Length Layout for Multi-Assembly Energy Storage
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Solution Overview
Problem
When multiple electrode assemblies are housed in a case, the positions of their current collector leads differ, leading to surplus portions that can cause issues and reduce reliability.
Innovation Solution
The design includes electrode assemblies with tabs of varying lengths, where shorter tabs are positioned between longer tabs and current collectors, ensuring precise alignment and reducing surplus portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple electrode assemblies are housed within the case to increase storage capacity, then the storage capacity is improved, but the current collector leads have different positions leading to surplus portions that reduce reliability
Solution Approach 1:
The patent applies local quality by making each tab have a specific length characteristic suited to its position. The first tab has a first length and the second tab has a second length different from the first, allowing each tab to be optimally positioned relative to the current collector without creating surplus portions. This localized differentiation in tab dimensions resolves the alignment issue that would otherwise compromise reliability.
Solution Approach 2:
The patent employs asymmetry by designing tabs with unequal lengths rather than uniform dimensions. The first tab extending from the first electrode assembly and the second tab extending from the second electrode assembly have different lengths, creating an asymmetric configuration that enables precise alignment with the current collector when multiple electrode assemblies are housed in the case, thereby preventing surplus portions and maintaining reliability.
2Quantity of substance
If multiple electrode assemblies are housed within the case, then the storage capacity is improved, but the arrangement complexity increases leading to alignment difficulties
Solution Approach 1:
The patent reduces arrangement complexity by assigning specific local characteristics to each tab. The first tab has a first length and the second tab has a second length, creating a standardized configuration that simplifies the assembly process. This local differentiation eliminates the need for complex alignment procedures while enabling multiple electrode assemblies to be housed efficiently in the case.
3Ease of manufacture
If tabs of equal length are used, then the manufacturing process is simplified, but surplus portions occur when multiple electrode assemblies are arranged, reducing reliability
Solution Approach 1:
The patent resolves the contradiction between manufacturing simplicity and reliability by implementing local quality through differentiated tab lengths. The first tab and second tab have different lengths specifically tailored to their positions in the multi-assembly configuration. This approach maintains manufacturing feasibility while eliminating surplus portions that would otherwise compromise reliability.
Solution Approach 2:
The patent applies asymmetry by designing tabs with unequal lengths rather than uniform dimensions. This asymmetric configuration of the first tab and second tab enables precise alignment when multiple electrode assemblies are housed in the case, preventing surplus portions and maintaining reliability without significantly complicating the manufacturing process.
Data Source
AI summary
An energy storage device includes a first electrode assembly, a second electrode assembly, and a first current collector. The first electrode assembly includes a first body and a first tab extending from an end of the first body in a first direction. The second electrode assembly includes a second body and a second tab extending from an end of the second body in the first direction. The first tab and the second tab are superimposed in the first direction and are joined to the first current collector at a first junction. The first tab is located between the second tab and the first current collector at the first junction. A length of the first tab is shorter than a length of the second tab.