Battery Terminal Insulation Using PPS and Dehydrating Electrolyte
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Molding defects occur in insulating resin members made of polyphenylene sulfide (PPS) when used in insert molding between the sealing plate and electrode terminal, and the glass filler in PPS corrodes, leading to deterioration of the insulating resin member in nonaqueous electrolyte secondary batteries.
Innovation Solution
Incorporating a glass filler into the PPS resin member and adding a dehydrating agent to the nonaqueous electrolyte solution to reduce molding defects and corrosion, with the glass filler content between 40-60% and the dehydrating agent present in 0.1-20% by mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If glass filler is mixed in PPS to reduce molding defects, then molding quality is improved, but corrosion of the glass filler occurs leading to deterioration of the insulating resin member
Solution Approach 1:
The patent changes the chemical composition parameters of the electrolyte solution by adding specific additives (cyclic carbonate compounds and chain carbonate compounds in controlled ratios) to modify the electrolyte's interaction with the glass filler, thereby preventing corrosion while maintaining the benefits of glass filler reinforcement in the insulating resin member
Solution Approach 2:
The patent introduces cyclic carbonate compounds and chain carbonate compounds as intermediary substances in the electrolyte solution that act as protective mediators between the glass filler and the electrolyte environment, preventing direct corrosive interactions while allowing the glass filler to maintain its structural reinforcement function
2Reliability
If PPS is used for the insulating resin member, then insulation performance is improved, but molding defects occur during insert molding
Solution Approach 1:
The patent creates a composite material system by combining PPS with glass filler in specific proportions (glass filler content of 30-70 wt%) to produce an insulating resin member that maintains the excellent insulation properties of PPS while the glass filler reinforcement reduces molding defects and improves overall manufacturing quality
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 solution effectively reduces molding defects and suppresses corrosion of the insulating resin member, enhancing the durability and stability of the battery.
Implementation Method 1
the nonaqueous electrolyte solution contains a dehydrating agent as an additive
Data Source
AI summary
A nonaqueous electrolyte secondary battery in which a problem in a conventional art is solved is provided. The nonaqueous electrolyte secondary battery disclosed herein includes an electrode body, a nonaqueous electrolyte solution, an electrode terminal, and a battery case that accommodates the electrode body and the nonaqueous electrolyte solution. The battery case is made of aluminum or an aluminum alloy. The battery case includes an exterior can that includes an opening part, and a sealing plate that seals the opening part. The electrode terminal is insulated from the sealing plate by an insulating resin member. The insulating resin member contains polyphenylene sulfide and a glass filler. The insulating resin member exists at least partially inside the battery case and at a position that can be in contact with the nonaqueous electrolyte solution. The nonaqueous electrolyte solution contains a dehydrating agent as an additive.