Secondary Battery Spacer for Uniform Electrolyte Diffusion
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Solution Overview
Problem
Existing nonaqueous electrolytic solution secondary batteries face challenges in uniformly distributing the electrolytic solution within the electrode body, particularly at positions far from the liquid injection hole, leading to potential damage and prolonged osmosis times.
Innovation Solution
The battery design incorporates a case main body with opposing side surfaces, a spacer with a partition part and diffusion member to diffuse the electrolytic solution uniformly across the electrode body, using a diffusion member to extend along the partition part and incline towards the liquid injection hole, facilitating rapid and wide-ranging distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrolytic solution is directly injected to the electrode body, then the injection process is simple, but the electrode body may be damaged due to the flowing power of the injected electrolytic solution
Solution Approach 1:
A partition member (liquid receiving part) is introduced as an intermediary between the liquid injection hole and the electrode body. This partition member receives the electrolytic solution and distributes it to the electrode body, preventing direct high-velocity impact that could damage the electrode while still enabling effective electrolyte distribution.
2Object-affected harmful factors
If a partition member is arranged between the liquid injection hole and the electrode body, then the electrode body is protected from damage, but the electrolytic solution takes longer to uniformly osmose to the inside of the electrode body
Solution Approach 1:
The partition member is divided into multiple segments or sections that create multiple flow paths for the electrolytic solution. This segmentation allows the solution to reach different regions of the electrode body simultaneously through parallel pathways, reducing the overall time required for uniform distribution while maintaining protective function.
Solution Approach 2:
The partition member has different structural characteristics at different locations - with varying thickness, porosity, or opening sizes in different regions. This local quality variation optimizes the flow distribution, allowing faster osmosis in regions farther from the injection hole while maintaining protection in critical areas.
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 significantly reduces the time required for the electrolytic solution to uniformly osmose within the electrode body, preventing damage and ensuring efficient distribution without prolonging the manufacturing process.
Implementation Method 1
a diffusion member configured to diffuse the electrolytic solution, injected from the liquid injection hole, along the partition part is provided on the partition part
Data Source
AI summary
A herein disclosed secondary battery includes a case main body, a sealing plate, an electrode body, an electrolytic solution, and a spacer. This spacer includes a pair of first wall parts that are configured to be along first side surfaces of the case main body, and includes a partition part that is configured to extend along an opposed direction of the first side surfaces so as to be disposed between the electrode body and the sealing plate. Then, in this secondary battery, a liquid injection hole and the partition part are opposed while keeping a constant space between them, and a diffusion member configured to diffuse the electrolytic solution, which is injected from the liquid injection hole, along the partition part is provided on the partition part.