Battery Insulation Plate Structure for Capacity and Electrolyte Flow
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Solution Overview
Problem
Secondary batteries face challenges in maintaining insulation performance while increasing capacity, efficiently injecting electrolyte solution, and discharging gas, with existing insulation plates being prone to structural warping and limited by manufacturing methods.
Innovation Solution
A secondary battery design featuring an insulation plate with a thin thickness of 0.3 mm to 0.5 mm, manufactured by injection molding, comprising linear members and openings of 0.1 mm to 3 mm, which forms a zigzag pattern and provides a buffering effect during structural deformation, ensuring even electrolyte injection and gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the insulation plate thickness is reduced to increase battery capacity, then the battery capacity increases, but the insulation performance deteriorates
Solution Approach 1:
The insulation plate is divided into multiple linear members spaced apart from each other, creating a segmented structure that maintains insulation effectiveness while reducing overall material thickness and volume
Solution Approach 2:
The insulation plate incorporates multiple openings (0.1 mm to 3 mm) within the linear members, creating a porous structure that reduces material usage and plate thickness while maintaining insulation performance through the distributed geometry
2Quantity of substance
If the insulation plate is made thinner to increase capacity, then the battery capacity increases, but the structural stability deteriorates
Solution Approach 1:
The plate is segmented into multiple linear members that can deform independently, allowing the structure to accommodate warping and structural changes without compromising overall stability
Solution Approach 2:
The linear members are designed to be capable of simultaneous deformation when structural warping occurs, transforming the rigid thin plate into a dynamic structure that adapts to structural changes
3Productivity
If the insulation plate includes multiple openings for electrolyte injection and gas discharge, then the electrolyte distribution and gas discharge improve, but the manufacturing complexity increases
Solution Approach 1:
Multiple functions (electrolyte injection, gas discharge, insulation) are merged into a single integrated insulation plate component with openings of varying sizes positioned at appropriate locations, eliminating the need for separate components
Solution Approach 2:
The openings have different size parameters (0.1 mm to 3 mm) optimized for different functions, with smaller openings for electrolyte injection and larger openings for gas discharge, allowing functional differentiation through parameter variation
Data Source
AI summary
A secondary battery includes: an electrode assembly comprising a lead tab; a case configured to accommodate the electrode assembly and an electrolyte solution; a cap assembly electrically connected to the lead tab, and coupled to the case to seal the case; and an insulation plate between the electrode assembly and the cap assembly within the case, and having a tab opening configured to enable the lead tab to be drawn out, wherein the insulation plate comprises plurality of linear members spaced apart from each other, and a plurality of openings having a size in a range of 0.1 mm to 3 mm are regularly positioned between the plurality of linear members.