Battery Cell Bracket Notch Structure for Sealing Pressure Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current battery cell sealing methods do not effectively facilitate pressure relief, which can compromise the safety of the cell and affect its performance.
Innovation Solution
A cell unit design that includes a bracket covering part of the sealing part, featuring a notch structure to allow pressure relief by protruding sections, enhancing protection and airtightness while reducing the risk of damage to the electrode terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the whole sealing part is enclosed by a bracket or protected through glue filling, then the protection for the sealing part is enhanced, but the pressure relief capability is compromised
Solution Approach 1:
The bracket is divided into multiple sections: a first section that covers and protects the sealing part, and a second section that forms a notch to enable pressure relief. This segmentation allows different parts of the bracket to fulfill different functions - protection and pressure relief simultaneously.
Solution Approach 2:
The bracket has different structural characteristics in different regions. The first section provides protective coverage over the sealing part, while the second section creates a localized notch structure that allows pressure to escape. Each region is designed with specific local qualities to achieve its designated function.
2Strength
If the bracket covers more of the first connection portion to enhance protection, then the airtightness is improved, but the pressure relief path may be blocked
Solution Approach 1:
The bracket structure is segmented into protective sections and pressure relief sections. The first section provides airtight protection by covering the connection portion, while the second section creates a controlled notch that serves as a pressure relief path, ensuring both functions coexist.
Solution Approach 2:
The notch structure acts as an intermediary element between the protective bracket and the internal cell pressure. It provides a controlled interface that allows pressure to escape while maintaining the protective function of the bracket, mediating between protection and pressure relief requirements.
Data Source
AI summary
A cell unit includes a cell and a bracket. The cell includes a cell housing and an electrode terminal. The cell housing includes a body portion and a first sealing part. The first sealing part includes a first connection portion. The bracket includes a first portion. The first portion covers a part of the first connection portion. The first connection portion includes a first end face. The first end face includes a first region. The first portion includes a first section and a second section. The first section covers a part of the first end face and a part of an outer surface of the first connection portion. The second section is connected to the first section, the first region is located outside the second section. When viewed along a second direction, the first section and the second section form a notch. The first region is located in the notch.