Prismatic Battery Venting Layout to Protect Electrode Terminals
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Solution Overview
Problem
Prismatic secondary batteries face terminal damage and electrical issues due to gas ejection when the venting part breaks, leading to potential corrosion and ignition, increasing the risk of explosion.
Innovation Solution
A prismatic secondary battery design featuring a hexahedral shape with the venting part positioned on a surface farthest from the electrode terminals, ensuring any gas discharge is directed downward and away from the terminals, protecting them from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the venting part is disposed near the electrode terminals for easy access and structural simplicity, then the device complexity is reduced, but the electrode terminals are damaged by corrosion and ignition when gas is ejected
Solution Approach 1:
The patent transitions from a two-dimensional arrangement where venting parts and terminals share the same surface to a three-dimensional spatial separation where the venting part is positioned on a different surface of the battery case. This dimensional change allows gas ejection to occur in a direction away from the terminals, eliminating the harmful interaction while maintaining structural simplicity.
2Ease of manufacture
If the venting part is disposed on the same surface as electrode terminals, then manufacturing and assembly are simplified, but gas discharge contacts the terminals causing corrosion and ignition
Solution Approach 1:
The battery case surface acts as an intermediary medium that separates the venting part from the electrode terminals. By positioning the venting part on a different surface, the battery case structure itself mediates the separation, preventing direct contact between ejected gas and terminals while maintaining ease of manufacture through simple structural modification.
3Area of stationary object
If electrode terminals and venting part are positioned close together, then the battery case size is minimized, but terminal damage occurs during venting operations
Solution Approach 1:
Instead of increasing the area of a single surface to separate the venting part from terminals, the patent utilizes the three-dimensional geometry of the battery case by positioning components on different surfaces. This approach maintains compact battery case dimensions while ensuring terminal safety through spatial separation.
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 configuration effectively prevents terminal damage without altering the internal structure of existing batteries, reducing development time and production costs by ensuring the venting part's discharge does not contact the terminals, thus enhancing safety and reliability.
Implementation Method 1
the venting part being located at a bottom surface where a discharge from the venting part is discharged downward and pulled to the ground by gravity
Data Source
AI summary
A prismatic secondary battery includes a battery case including six flat surfaces that are first to sixth surfaces to form a hexahedral shape, the first and third surfaces having an area wider than the second and fourth surfaces, and the fifth and sixth surfaces having the widest area. A positive electrode terminal and a negative electrode terminal are disposed on at least one surface of the first, second, and fourth surfaces; and a venting part is disposed on the third surface.