Battery Cover Plate Nickel Plating for Corrosion-Resistant Venting
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Solution Overview
Problem
Existing battery technologies fail to address the issue of structurally fragile portions on their cover plates, which are prone to rust and corrosion, leading to leakage and voltage drop.
Innovation Solution
A cover plate with a phosphorus-containing nickel plating layer is applied to the structurally fragile portions of the cover plates, which are prone to rust and corrosion, leading to leakage and voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a structurally fragile portion is designed on the cover plate to release high-pressure gases, then safety is improved, but corrosion resistance deteriorates due to direct contact with electrolyte
Solution Approach 1:
A phosphorus-containing nickel plating layer is introduced as an intermediary protective barrier between the structurally fragile portion and the electrolyte. This plating layer prevents direct contact between the metal substrate and corrosive electrolyte, thereby maintaining corrosion resistance while preserving the pressure release function.
Solution Approach 2:
The cover plate employs a composite structure combining the phosphorus-containing nickel plating layer with the metal substrate. This composite material approach provides both the structural integrity needed for pressure release and the corrosion resistance required for long-term reliability in the electrolyte environment.
2Stress or pressure
If the structurally fragile portion is made thinner to facilitate pressure release, then pressure venting capability is improved, but strength and corrosion resistance worsen
Solution Approach 1:
The phosphorus-containing nickel plating layer serves as a protective intermediary that compensates for the reduced thickness of the structurally fragile portion. By providing a corrosion-resistant barrier, the plating allows the metal substrate to be made thinner for better pressure venting without sacrificing strength or corrosion resistance.
Solution Approach 2:
The invention changes the chemical composition parameter of the nickel plating by incorporating phosphorus (2-20 wt%), which significantly enhances the corrosion resistance of the plating layer. This parameter change allows the fragile portion to maintain adequate strength and corrosion resistance even at reduced thickness.
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 cover plate with a phosphorus-containing nickel plating layer effectively prevents rust and corrosion, ensuring reliable operation and prolonged service life, even at high temperatures.
Implementation Method 1
a phosphorus-containing nickel plating layer is plated on the outside of at least part of the structurally fragile portion
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A cover plate (100), a battery (600) and an electronic device is provided. The cover plate (100) includes an integrally formed non-structurally fragile portion (102) and a non-structurally fragile portion (101). The structural strength of the non-structurally fragile portion (101) is lower than the structural strength of the non-structurally fragile portion (102). The non-structurally fragile portion (101) is configured to be destroyed when the battery (600) releases internal pressure. At least part of the outer side of the non-structurally fragile portion (101) is covered with a phosphorus-containing nickel plating layer (103).