Battery Cell Shell Structure for Pressure Relief Support
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Solution Overview
Problem
Existing battery cell designs face safety concerns due to insufficient support for pressure relief mechanisms, leading to potential damage and reduced service life, as the shell's equal wall thickness compromises the connection and support for the pressure relief mechanism, affecting the safety and performance of the battery cell.
Innovation Solution
A battery cell design with a shell featuring a first wall with greater thickness than the second walls, incorporating a pressure relief mechanism that activates when gas pressure reaches a threshold, enhancing the support for the explosion-proof valve and improving the service life by increasing the connection area and wall thickness, thereby ensuring safety performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the shell has equal wall thickness throughout, then the manufacturing is simple and cost-effective, but the pressure relief mechanism lacks sufficient support and connection area
Solution Approach 1:
The shell wall thickness is designed to be non-uniform, with the first wall having greater thickness than the second walls. This local quality variation provides enhanced support and connection area specifically at the pressure relief mechanism location without unnecessarily increasing the thickness of other shell portions, thus resolving the contradiction between strength and device complexity.
2Reliability
If the first wall thickness is increased to support the pressure relief mechanism, then the safety and service life are improved, but the material consumption and manufacturing cost increase
Solution Approach 1:
The shell wall thickness is designed to be non-uniform, with the first wall having greater thickness than the second walls. This local quality variation provides enhanced support and connection area specifically at the pressure relief mechanism location without unnecessarily increasing the thickness of other shell portions, thus resolving the contradiction between strength and device complexity.
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
The enhanced support for the pressure relief mechanism improves the safety and service life of the battery cell by effectively releasing pressure and preventing damage, ensuring the safety performance of the battery cell.
Implementation Method 1
the pressure relief mechanism is adapted to be activated so as to release the pressure when a gas pressure inside the shell reaches a threshold
Data Source
AI summary
The present disclosure relates to a battery cell, a battery and an electric-powered device, and the battery cell includes: an electrode assembly; a shell adapted for receiving the electrode assembly; and a cap assembly adapted for closing an opening of the shell, wherein the shell includes a first wall and two second walls opposite each other, the first wall is adapted to connect the two second walls, the first wall has a wall thickness greater than that of the second wall, the first wall is provided with a pressure relief mechanism, and the pressure relief mechanism is adapted to be activated so as to release the pressure when a gas pressure inside the shell reaches a threshold.