Dry Electrode Plate Lamination for Crack-Resistant Fiber Networks
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Solution Overview
Problem
Current dry electrode manufacturing methods result in poor fiberization in both longitudinal and transverse directions, leading to weak electrode plates prone to cracking, with existing processes either damaging the structure or being inefficient and difficult to control.
Innovation Solution
A manufacturing method involving the stacking of active material films with perpendicular fiberization directions, application of conductive glue, rolling, and combination with a current collector to create a fibrous network structure, enhancing mechanical strength and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If baking is used to increase fiberization, then fiberization occurs easily in the rolling film forming process, but the structure of PTFE that is already subjected to fiberization or has a fiberization tendency is destroyed
Solution Approach 1:
The patent applies preliminary fiberization treatment to the active material particles before electrode manufacturing. By pre-coating particles with PTFE and performing preliminary fiberization, the structure is stabilized before the rolling process, preventing destruction during subsequent baking and rolling operations while maintaining fiberization benefits
Solution Approach 2:
The patent divides the fiberization process into separate stages: preliminary fiberization of individual particles, then fiberization of the stacked film structure during rolling. This segmentation allows each stage to optimize for its specific function without interfering with the other, solving the contradiction between easy fiberization and structure stability
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 method improves the mechanical strength and conductivity of electrode plates by creating a uniform fiberization network, reducing the likelihood of cracking and enabling efficient mass production with suitable thickness and reduced surface resistance.
Implementation Method 1
applying a conductive glue between the two adjacent active material films
Implementation Method 2
Rolling the stacked at least two active material films to obtain an electrode film
Implementation Method 3
the thinning treatment is realized by hot pressing
Implementation Method 4
a flat plate hot press is used for combination. The surface temperature of the flat plate hot press is 185 °C, and the pressure is 2-6.7 MPa
Data Source
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AI summary
The present invention discloses an electrode plate, a manufacturing method therefor and a battery. The manufacturing method for an electrode plate comprises: obtaining at least two active material films; stacking the at least two active material films, the fiberization directions of the two adjacent active material films being perpendicular to each other or forming an included angle, and applying a conductive glue between two adjacent active material films; rolling the stacked at least two active material films to obtain an electrode film; and combining the electrode film with a current collector to obtain the electrode plate. The manufacturing method of the present disclosure can improve the strength of the electrode film, and thus the electrode film is not prone to cracking. The included angle is formed between the fiberization directions of the two adjacent active material films, so that the electrode plate is prone to cracking are solved.