Battery Cell Current Collector Channels for Faster Electrolyte Infiltration
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Solution Overview
Problem
Current battery cell manufacturing processes suffer from low electrolyte injection efficiency and inadequate infiltration of the electrode assembly, leading to reduced capacitance and safety performance.
Innovation Solution
The introduction of a guide channel in the current collection component, specifically through-holes and grooves, to facilitate rapid and sufficient diffusion of the electrolytic solution within the battery cell, enhancing electrolyte injection efficiency and improving capacitance and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional current collection component structure is used, then manufacturing is simple, but electrolyte injection efficiency is low and infiltration is insufficient
Solution Approach 1:
The current collection component is segmented into a center portion and a periphery portion with guide channels between them. This segmentation creates dedicated pathways for electrolyte flow, enabling the electrolyte to reach both the center hole and periphery tabs efficiently, thereby resolving the contradiction between injection efficiency and structural simplicity.
Solution Approach 2:
Guide channels are introduced as intermediary structures connecting the center portion and periphery portion of the current collection component. These channels act as mediators that direct electrolyte flow from the injection point at the center hole to the periphery tabs, ensuring sufficient infiltration without requiring complex external injection systems.
2Speed
If electrolyte injection is performed without guide channels, then structure is simpler, but infiltration speed and sufficiency are insufficient
Solution Approach 1:
The guide channels are pre-formed within the current collection component structure before electrolyte injection. This preliminary action creates ready-made pathways that accelerate electrolyte infiltration speed, eliminating the need for complex external injection equipment while ensuring rapid and sufficient penetration to all regions including the periphery tabs.
3Manufacturing precision
If center portion and periphery portion are integrated without guide channels, then manufacturing is easier, but electrolyte distribution is uneven
Solution Approach 1:
The current collection component is divided into functionally distinct center and periphery portions connected by guide channels. This segmentation ensures uniform electrolyte distribution by providing dedicated flow paths to both regions, achieving precise manufacturing results without significantly complicating the fabrication process as the channels can be integrated into the component molding.
Solution Approach 2:
Different regions of the current collection component are designed with distinct functions: the center portion receives electrolyte injection, while the periphery portion connects to tabs. Guide channels provide localized quality control by directing electrolyte flow specifically to where it is needed, ensuring uniform distribution across different zones without requiring complex post-processing manufacturing steps.
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 guide channel design allows for quick and complete infiltration of the electrolytic solution, thereby improving the electrolyte injection efficiency, capacitance, and safety performance of the battery cell.
Implementation Method 1
The guide channel is configured to guide an electrolytic solution in the center hole to diffuse from the center portion to the periphery portion
Data Source
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AI summary
This application discloses a battery cell and a method and equipment for manufacturing same, a battery, and an electrical device, and relates to the technical field of battery manufacturing. This application discloses a battery cell, including: a shell, including a first wall; an electrode terminal, dielectrically mounted on the first wall; an electrode assembly, accommodated in the shell, where the electrode assembly includes a center hole, and a first tab is disposed on the electrode assembly; and a current collection component, disposed between the first wall and the electrode assembly. The current collection component includes a center portion and a periphery portion. The center portion positionally corresponds to the center hole. The center portion is configured to be connected to the electrode terminal. The periphery portion is configured to be connected to the first tab. A guide channel is disposed on the current collection component. The guide channel is configured to guide an electrolytic solution in the center hole to diffuse from the center portion to the periphery portion. The electrolyte injection efficiency, the capacitance, and the safety performance of the battery cell are relatively high. This application further discloses a battery and an electrical device that include the battery cell. This application further discloses a method and equipment for manufacturing the battery cell.