Composite Electrode Layout for Larger Active Material Coverage
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Solution Overview
Problem
Existing composite electrode plates in secondary batteries have limited active material layer coating area, leading to suboptimal capacity and current carrying capacity, and there is a need for improved design to increase these aspects.
Innovation Solution
The electrode component design includes a conductive layer with adjacent first and second areas, where the tab assembly connects to the second area, with a maximum space D0 less than the minimum size D1 of the unconnected part, allowing for a larger active material layer coverage and insulation coating, enhancing the connection area between the tab assembly and the second area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the composite electrode plate uses a traditional structure with separately arranged blank area and active material layer coating region, then the tab welding is simplified, but the active material layer coating area is limited
Solution Approach 1:
The patent merges the blank area and the active material layer coating region into a unified conductive layer structure. The conductive layer continuously covers both the area where the tab assembly connects and the area where active material is coated, eliminating the need for separate structural arrangements. This integration increases the active material layer coating area while maintaining structural simplicity.
Solution Approach 2:
The patent extends the conductive layer coverage along the length direction of the electrode plate, utilizing the longitudinal dimension more effectively. By making the conductive layer continuously cover from the tab connection area through the active material coating region, the design maximizes the use of available space in the length direction to increase coating area without adding structural complexity.
2Quantity of substance
If the active material layer coating area is increased, then the capacity of the electrode component is improved, but the connection area between tab assembly and conductive layer may be reduced
Solution Approach 1:
The conductive layer is functionally segmented into two adjacent regions: a first area that contacts the active material layer and a second area that connects to the tab assembly. This segmentation allows the active material layer to cover the first area while the tab assembly connects to the second area, ensuring both the capacity (through increased active material coverage) and the connection area are adequately provided without compromise.
Data Source
AI summary
An electrode component, a battery cell, a battery and an electrical apparatus are disclosed. The electrode component includes an electrode body including an active material layer, an insulation substrate and a conductive layer arranged on the insulation substrate, in which, a surface, facing away from the insulation substrate, of the conductive layer includes a first area and a second area which are arranged adjacent to each other in a first direction, and the active material layer covers the first area; and a tab assembly of which one end is connected to the second area; wherein in the first direction, the maximum space between the end, connected to the second area, of the tab assembly and the active material layer is D0, the minimum size of a part, not connected to the tab assembly, of the second area is D1, and D0 is smaller than D1.