Rotating Electrode Stacking for Battery Terminal Overlap
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Solution Overview
Problem
Conventional layer-built batteries require multiple collectors with different shapes for voltage detection, increasing manufacturing complexity and cost due to the need for precise stacking and formation of variously shaped collectors.
Innovation Solution
A method of manufacturing power storage devices where electrode elements with generally rotationally symmetric shapes are stacked at varying angles, with terminal portions arranged to prevent overlap and allow for voltage detection without the need for different collector shapes, using a single shape for all collectors to simplify the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If multiple collectors with different shapes are used for voltage detection in each unit cell, then voltage detection capability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies universality by making the collector serve multiple functions: it acts as both the current collector and the voltage detection electrode. The collector is extended to the edge of the electrode layer, allowing it to function as the voltage detecting tab without requiring separate detection electrodes, thereby simplifying the structure while maintaining voltage detection capability
Solution Approach 2:
The patent extracts the voltage detection function from a separate component and integrates it into the collector itself. By extending the collector to the edge of the electrode layer, the collector directly serves as the voltage detecting tab, eliminating the need for additional detection components and reducing manufacturing complexity
2Difficulty of detecting and measuring
If multiple collectors with different shapes are formed for each unit cell, then voltage detection is enabled, but manufacturing cost increases
Solution Approach 1:
The collector is designed to perform dual functions as both current collection and voltage detection. By extending the collector to the edge of the electrode layer, it becomes the voltage detecting tab, eliminating the need for separate detection electrodes and reducing the variety of components that need to be manufactured
Solution Approach 2:
The patent merges the current collector and voltage detecting tab into a single integrated component. The collector is extended to the edge of the electrode layer, combining the functions of current collection and voltage detection into one structure, thereby reducing the number of parts and manufacturing steps
3Difficulty of detecting and measuring
If collectors of different shapes are stacked in predetermined order, then proper voltage detection is achieved, but the manufacturing process becomes complicated
Solution Approach 1:
The patent applies homogeneity by making all collectors have the same structure - extending to the edge of the electrode layer. This uniform design allows all unit cells to be manufactured using the same process without requiring different collector shapes, thereby simplifying the manufacturing process and improving productivity while maintaining accurate voltage detection
Data Source
AI summary
The invention provides a method of manufacturing a power storage device which enables facilitation of manufacturing of the power storage device while a plurality of terminal portions are prevented from overlapping one another when viewed from a stacking direction. The method of manufacturing the power storage device including a plurality of electrode elements stacked with electrolyte layers interposed between them, the method includes a first step of forming the electrode element which has a generally rotationally symmetric outer shape when viewed from a stacking direction and includes a terminal portion protruding in an outward direction of the power storage device in an area of the outer shape, and a second step of stacking the plurality of electrode elements formed in the first step with the electrolyte layers interposed between them at varying angles in a stacking plane such that the terminal portions do not overlap one another when viewed from the stacking direction.