Battery Electrode Plate Marking on Mixture Layer for Readability
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Solution Overview
Problem
Existing electrode plates face challenges in providing identification marks due to their small width and susceptibility to deformation during battery charging and discharging, making it difficult to read the marks accurately.
Innovation Solution
The electrode plate design includes forming an identification mark on the surface of the mixture layer, which is covered by a tape, and using laser marking to create the mark, ensuring it is not easily deformed and can be read reliably.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the identification mark is provided on the lead, then it is easy to form the mark, but the lead width is generally small making it difficult to provide the mark on the surface
Solution Approach 1:
The identification mark is moved from the lead (one-dimensional narrow surface) to the mixture layer (two-dimensional larger surface), changing the dimensional space where the mark is formed. This allows the mark to be placed on a surface with sufficient area while maintaining ease of formation through laser marking.
2Area of stationary object
If the identification mark is provided on the core exposed portion, then it can be formed on a larger surface, but the core exposed portion has low stiffness making it easy to deform the mark during charging and discharging
Solution Approach 1:
Instead of forming the identification mark directly on the core exposed portion (which has low stiffness), the mark is formed on the mixture layer which has higher structural stability. The mixture layer serves as a more rigid substrate that can maintain the mark's integrity during battery operation without direct mechanical stress.
3Ease of operation
If the identification mark is provided on the core exposed portion, then it can be seen, but low stiffness makes it easy to cause deformation due to tensile force during charging and discharging
Solution Approach 1:
The identification mark is copied from the core exposed portion to the mixture layer, where it can maintain visibility while being protected from deformation. The mixture layer provides a stable substrate that does not undergo the same tensile stresses as the core exposed portion during battery charging and discharging.
4Area of stationary object
If the core exposed portion is enlarged to provide the identification mark, then the mark can be formed, but it increases the area which may affect capacity and safety
Solution Approach 1:
The identification mark is relocated from the core exposed portion to the mixture layer, utilizing the available surface area on the mixture layer instead of enlarging the core exposed portion. This approach maintains the battery's capacity and safety by keeping the core exposed portion area minimal while still providing sufficient space for the identification mark.
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
This design allows for easy and durable formation of identification marks that are less prone to deformation and reading errors, facilitating accurate identification of the electrode plates.
Implementation Method 1
irradiating a surface of the mixture layer with laser light to form an identification mark
Data Source
AI summary
A cylindrical battery, which is an example of an embodiment of the present invention, comprises an electrode body including a positive electrode plate and a negative electrode plate as electrode plates. Each electrode plate comprises a core body and a mixture layer formed on the core body. An identification marking is formed on a surface of the mixture layer. The identification marking is covered with, for example, tape.