Battery Cover Member With Air Gaps for Electrolyte Impregnation
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Solution Overview
Problem
In the manufacturing of embedded batteries, dimensional tolerances between the electrode assembly and the exterior material can cause movement during external shocks, leading to stress and potential damage, and using adhesives to prevent movement can impede electrolyte impregnation, especially with polyethylene terephthalate (PET) electrode assemblies.
Innovation Solution
A battery design featuring a cover member surrounding at least a partial area of the electrode assembly with air gaps that overlap and are fixed to the exterior material, allowing for electrolyte impregnation while preventing movement and stress on the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate adhesive member (e.g., tape) is used to prevent movement of the electrode assembly, then the battery stability is improved, but the electrolyte impregnation of the electrode assembly is reduced
Solution Approach 1:
The cover member acts as an intermediary structure between the electrode assembly and the exterior material. It provides mechanical support and prevents movement without forming a complete seal, allowing electrolyte to penetrate through the air gaps to the electrode assembly while still providing structural stability.
Solution Approach 2:
The cover member is designed with air gaps that create a porous structure. This allows the electrolyte to pass through the cover member and reach the electrode assembly for proper impregnation, while the overall structure still provides mechanical support and prevents excessive movement.
2Reliability
If dimensional tolerances are reduced between electrode assembly and exterior material, then movement during external shocks is prevented, but manufacturing complexity increases
Solution Approach 1:
The battery structure is segmented into distinct functional components: the electrode assembly, the cover member with air gaps, and the exterior material. This segmentation allows each component to perform its specific function independently, with the cover member absorbing dimensional variations without requiring tight tolerances between all components.
Solution Approach 2:
The cover member provides localized structural support where needed, with air gaps strategically positioned to allow electrolyte flow. This local quality approach provides stability in critical areas while maintaining manufacturing feasibility through standardized components.
3Reliability
If the electrode assembly is completely enclosed in exterior material, then protection is improved, but electrolyte impregnation is hindered
Solution Approach 1:
The cover member incorporates air gaps that create a porous structure, allowing the electrolyte to penetrate through the protective layer and reach the electrode assembly. This resolves the contradiction by providing both protection and permeability simultaneously.
Solution Approach 2:
The battery structure uses a composite arrangement combining the cover member with air gaps and the exterior material. This composite structure provides protection while maintaining electrolyte access, as the air gaps create channels for electrolyte flow within the protective framework.
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 enhances the stability of the battery by preventing physical or functional damage from external shocks, reducing risks of electrolyte leakage, electric leakage, ignition, or explosion, and maintaining operational stability.
Implementation Method 1
a plurality of air gaps permitting impregnation of the electrode assembly by an electrolyte
Data Source
Figure 1
Figure 2a
Figure 2b~3
AI summary
A battery includes an electrode assembly including a positive electrode sheet, a separation membrane, and a negative electrode sheet, at least one cover member surrounding at least a part of an outermost region of the electrode assembly, and exterior material accommodating the electrode assembly and the at least one cover member. The at least one cover member has at least a partial area that overlaps and is fixed to the exterior material, and includes a plurality of air gaps permitting impregnation of the electrode assembly by an electrolyte. An electronic device includes a housing, a display accommodated in the housing and having at least part exposed outside the housing, a memory disposed in the housing, a battery accommodated in the housing, and a processor electrically connected to the display, the memory, and the battery. Other various embodiments as understood from the specification are possible.