Battery Spacer Structure for Electrolyte Flow and Strength
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Solution Overview
Problem
Existing secondary batteries face challenges in readily introducing an electrolyte solution into the electrode assembly while maintaining the strength of the spacer between the electrode assembly and the case.
Innovation Solution
The secondary battery design includes a case with openings sealed by sealing plates and spacers with specific configurations, such as through holes and intersecting walls, allowing for easy electrolyte injection and maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a spacer is disposed between the electrode assembly and sealing plate to maintain structure, then structural strength is improved, but electrolyte solution introduction becomes difficult
Solution Approach 1:
The spacer incorporates through-holes that allow the electrolyte solution to pass through the spacer structure. This porous configuration enables the electrolyte to reach the electrode assembly while the solid portions of the spacer maintain structural support between the sealing plate and electrode assembly, thus resolving the contradiction between structural strength and electrolyte introduction.
2Ease of operation
If through holes are provided in the spacer for electrolyte introduction, then electrolyte solution introduction is facilitated, but spacer strength is reduced
Solution Approach 1:
The spacer is designed with through-holes only in specific regions where electrolyte introduction is needed, while other regions maintain solid structure for strength. The outer peripheral wall and inner wall configurations create localized openings that facilitate electrolyte flow without compromising the overall structural integrity of the spacer.
Solution Approach 2:
The spacer structure is divided into multiple functional zones: outer peripheral walls for structural support, inner walls for defining flow paths, and through-holes for electrolyte introduction. This segmentation allows different portions of the spacer to fulfill different functions - some areas provide strength while others enable electrolyte flow.
3Ease of manufacture
If a simple spacer structure is used, then manufacturing is easier, but structural stability is insufficient
Solution Approach 1:
The spacer is constructed from multiple wall structures (outer peripheral wall with first and second portions, and an inner wall) that can be formed through standard molding processes. Each wall segment serves a specific function and can be manufactured using conventional techniques, achieving structural stability without requiring complex or specialized manufacturing methods.
Data Source
AI summary
A first spacer is disposed between a first sealing plate and an electrode assembly. The first spacer includes a first base portion, a first outer peripheral wall, and a first inner wall. The first base portion is provided with a plurality of through holes. The first outer peripheral wall extends from an outer peripheral edge of a surface of the first base portion on the first sealing plate side toward the first sealing plate, and has a first portion and a second portion facing each other. The first inner wall is provided to connect the first portion and the second portion of the first outer peripheral wall.