Wound Battery Conductive Plate Layout for Lower Internal Resistance
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Solution Overview
Problem
The impedance of full-tab structure batteries is relatively high, affecting their service life.
Innovation Solution
A battery design featuring a conductive plate with multiple connection portions arranged in an array around a main body portion, connected to the electrode plate, and integrated with the housing to enhance current collection and reduce internal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a full-tab structure battery is used, then production efficiency and equipment investment are improved, but internal resistance increases affecting service life
Solution Approach 1:
The conductive plate is segmented into a main body portion and multiple connection portions arranged in an array. This segmentation allows current to be collected from multiple points on the electrode plate simultaneously, reducing the overall internal resistance while maintaining the full-tab structure's production efficiency advantages.
Solution Approach 2:
The connection portions are arranged in an array around the main body portion, transitioning from a single-point connection to a multi-point spatial distribution. This dimensional arrangement shortens the electron flow path and reduces internal resistance, thereby improving service life without compromising production efficiency.
2Device complexity
If a single connection point is used, then device complexity is reduced, but current uniformity deteriorates
Solution Approach 1:
The conductive plate is divided into a main body portion and multiple connection portions. This segmentation enables current to be collected from multiple locations on the electrode plate, ensuring uniform current distribution while keeping the overall structure relatively simple through the array arrangement of connection portions.
Solution Approach 2:
Different portions of the conductive plate serve different functions: the main body portion provides structural support and housing connection, while the multiple connection portions are strategically positioned to ensure uniform current collection from different regions of the electrode plate, optimizing local current distribution.
3Ease of manufacture
If the electron flow path is lengthened, then manufacturing simplicity is maintained, but internal resistance increases
Solution Approach 1:
The connection portions are arranged in an array around the main body portion, creating multiple shortened electron flow paths from different locations on the electrode plate to the housing. This spatial arrangement reduces the overall electron flow path length and internal resistance while maintaining manufacturing simplicity through a systematic array configuration.
Solution Approach 2:
The conductive plate is pre-configured with multiple connection portions in an array arrangement before assembly. This preliminary configuration ensures that during assembly, the electron flow paths are naturally shortened without requiring complex post-assembly adjustments, maintaining ease of manufacture while reducing internal resistance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design improves current uniformity and reduces internal resistance, thereby prolonging the battery's service life.
Implementation Method 1
the first conductive plate includes a main body portion and a plurality of connection portions arranged in an array around the main body portion; ends of the connection portions are spaced apart and each are connected to the first electrode plate
Implementation Method 2
through the connection of the main body portion to the housing, an electron flow path is shortened, thereby reducing the internal resistance of the battery
Data Source
AI summary
An battery includes a housing, an electrode assembly, and a first conductive plate, where the housing includes a first recess; the electrode assembly is disposed in the first recess, the electrode assembly includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate, the electrode assembly is formed by winding the first electrode plate, the second electrode plate, and the separator around a winding axis, and the electrode assembly includes a central portion; and the first conductive plate includes a main body portion and a plurality of connection portions arranged in an array around the main body portion, and ends of the connection portions are all spaced apart from each other and each are connected to the first electrode plate. The first conductive plate is connected to a bottom of the first recess.