Battery Conductive Plate Array for Low Impedance
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Solution Overview
Problem
The high impedance of full-tab structure batteries affects their service life, necessitating a solution to enhance current collection and reduce internal resistance.
Innovation Solution
A battery design featuring a conductive sheet with multiple connection portions arranged in an array around a main body portion, connected to a housing, to enhance current uniformity and shorten electron flow paths, thereby reducing internal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional full-tab battery structure is used, then the battery achieves basic current collection, but the impedance is relatively high which affects service life
Solution Approach 1:
The conductive sheet is divided into a main body portion and multiple connection portions arranged in an array. This segmentation allows the current to be collected from multiple distributed points on the electrode assembly rather than a single point, reducing the overall impedance and improving current uniformity throughout the battery structure.
Solution Approach 2:
The connection portions are arranged in an array pattern around the main body portion, transitioning from a single-point current collection (0D) to a distributed multi-point collection (2D array). This dimensional change enables broader coverage of the electrode assembly, reducing impedance by providing multiple parallel current pathways.
2Reliability
If a single connection point is used for current collection, then the structure is simple, but the current uniformity is poor
Solution Approach 1:
The conductive sheet is divided into a main body portion and multiple connection portions arranged in an array. This segmentation allows the current to be collected from multiple distributed points on the electrode assembly rather than a single point, reducing the overall impedance and improving current uniformity throughout the battery structure.
3Object-affected harmful factors
If the electron flow path is long, then the internal resistance increases, but the structural design is more flexible
Solution Approach 1:
The connection portions are arranged in an array pattern around the main body portion, transitioning from a single-point current collection (0D) to a distributed multi-point collection (2D array). This dimensional change enables broader coverage of the electrode assembly, reducing impedance by providing multiple parallel current pathways.
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 collection, ensures uniform current distribution, and prolongs the service life of the battery by reducing internal resistance.
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
Figure 1
Figure 2
Figure 3~4
AI summary
Some embodiments of this application relate to the field of battery technologies and particularly disclose a battery. The 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; and along a winding axis direction, the first conductive plate is disposed between the bottom of the first recess and the electrode assembly, and an orthographic projection of the first conductive plate overlaps with an orthographic projection of the central portion.