Wound Battery Cell Conductive Core for Separator Stability
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Solution Overview
Problem
Current wound structure batteries face issues such as short circuits due to separator dislocation during winding needle removal, leading to safety hazards and quality degradation from electrode plate deformation under external forces.
Innovation Solution
A battery design featuring a conductive structure within the cell winding space, comprising electrically isolated first and second conductive parts connected to electrode plates, which replaces the winding needle, preventing separator dislocation and providing support against electrode plate deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a winding needle is used to wind the battery cell, then the battery cell can be formed, but the separator is pulled out or dislocated when the winding needle is drawn out, causing short circuits and safety hazards
Solution Approach 1:
The conductive structure is pre-installed in the battery cell before winding, serving as a support framework that prevents separator dislocation during and after the winding process. This preliminary placement ensures the separator remains in position without requiring post-winding needle removal that causes harm.
Solution Approach 2:
The conductive structure acts as an intermediary element between the winding process and the final battery cell structure. It provides a temporary but functional support during winding that remains in place to prevent separator dislocation, replacing the harmful removable winding needle with a beneficial permanent structure.
2Ease of manufacture
If the winding needle is drawn out after winding, then the battery cell can be completed, but the battery cell becomes hollow and electrode plates deform under external force, affecting quality
Solution Approach 1:
The conductive structure is installed beforehand to provide continuous support to the electrode plates throughout the winding process and beyond. This preliminary support framework prevents the battery cell from becoming hollow and maintains electrode plate shape stability under external forces.
Solution Approach 2:
The harmful function of the winding needle (being removed and causing hollow structure) is extracted and replaced with a beneficial conductive structure that remains in place. The negative aspect of needle removal is eliminated while retaining the essential winding function.
3Power
If the first conductive part and second conductive part are electrically connected, then electrical conductivity is improved, but short circuit occurs between positive and negative electrode plates
Solution Approach 1:
The conductive structure is divided into two electrically isolated parts: a first conductive part connected to the positive electrode plate and a second conductive part connected to the negative electrode plate. This segmentation prevents electrical short circuit while maintaining necessary electrical conductivity within each polarity group.
Solution Approach 2:
Electrical isolation is achieved by separating the conductive paths in different spatial dimensions or pathways. The first and second conductive parts are positioned and configured to prevent electrical contact while both remaining connected to their respective electrode plates, solving the contradiction through spatial arrangement.
Data Source
AI summary
A battery includes a housing and a battery cell accommodated in the housing. The housing includes a first housing body and a second housing body fitting with the first housing body. The battery cell includes a first electrode plate and a second electrode plate wound around a hollow cell winding space to form the battery cell. The battery further includes a conductive structure accommodated in the cell winding space, where the conductive structure includes a first conductive part and a second conductive part electrically isolated from each other. The first conductive part is connected with the first electrode plate and in electrical communication with the first housing body; and the second conductive part is connected with the second electrode plate and in electrical communication with the second housing body. The first housing body and the second housing body are electrically isolated from each other.