Multi-Tab Electrode Assembly for Higher Current and Lower Heat
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Solution Overview
Problem
Existing batteries face issues with high temperature rise and limited current-carrying capacity due to their two-tab structure, which affects the performance of portable electronic devices.
Innovation Solution
An electrode assembly with a multi-tab structure is designed, featuring three tabs formed by stacking and winding tab units on electrode plates, allowing parallel connection to enhance current-carrying capacity and reduce temperature rise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a two-tab structure is adopted in the battery, then the device complexity is reduced and ease of manufacture is improved, but the current-carrying capacity is limited and temperature rise is high
Solution Approach 1:
The patent divides the single tab structure into multiple tabs (at least three tabs: first positive tab, second positive tab, and negative tab). Each tab is formed by stacking multiple tab units on electrode plates during the winding process. This segmentation increases the current-carrying capacity by providing multiple parallel current paths while maintaining manufacturability through the systematic arrangement of tab units on different winding layers.
2Device complexity
If a two-tab structure is adopted in the battery, then the device complexity is reduced, but the temperature rise is high
Solution Approach 1:
The patent segments the current collection function into multiple tabs distributed across different winding layers. This segmentation reduces the current density on each individual tab and distributes heat generation more evenly throughout the battery structure, thereby reducing overall temperature rise while maintaining relatively simple device architecture.
Solution Approach 2:
The patent utilizes the radial dimension of the wound battery structure by placing tabs on different winding layers (first, second, and third layers). This dimensional distribution allows current and heat to be dispersed in the radial direction, reducing localized heating and improving thermal management without significantly increasing device complexity.
3Reliability
If multiple tab units are stacked to form multiple tabs, then the current-carrying capacity is enhanced and temperature rise is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the tab formation process into discrete tab units that are systematically placed on specific winding layers. Each tab unit has defined positioning requirements, but the segmented approach allows for modular manufacturing and assembly, making the precision requirements more manageable compared to forming a single complex tab structure.
Solution Approach 2:
The patent applies different positioning precision requirements to different tab units based on their locations. Tab units on the same winding layer have coordinated positioning requirements, while tabs on different layers have independent positioning tolerances. This local quality approach optimizes manufacturing precision by not requiring uniform high precision across all tabs, thereby facilitating production while maintaining electrical performance.
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 multi-tab structure effectively shunts current, enhancing the battery's current-carrying capacity and reducing temperature rise, thereby improving the performance and safety of portable electronic devices.
Implementation Method 1
a separator, wherein a polarity of the second electrode plate is opposite to a polarity of the first electrode plate, and the separator is disposed between the first electrode plate and the second electrode plate
Implementation Method 2
The plurality of tabs are connected in parallel to shunt a current to reduce a temperature rise of the electrode assembly
Implementation Method 3
The electrode assembly is formed by winding the first electrode plate, the separator, and the second electrode plate
Data Source
AI summary
An electrode assembly, including a first electrode plate, a second electrode plate, and a separator. The electrode assembly is formed by winding the first electrode plate, the separator, and the second electrode plate. A first tab formed by a plurality of first tab units and a second tab formed by a plurality of second tab units are disposed on the first electrode plate, and a third tab formed by a plurality of third tab units is disposed on the second electrode plate. The electrode assembly is provided with a multi-tab structure to achieve purposes of enhancing a current-carrying capacity of the battery and reducing a temperature rise.