Joined-Edge Battery Valve Structure for Controlled Gas Discharge
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Solution Overview
Problem
Existing battery designs face challenges in accurately controlling gas pressure for removal and risk damaging the battery element with attached valve devices.
Innovation Solution
A battery design featuring a housing body with a joined edge portion and a valve device sandwiched between the housing portions, where the valve device is positioned to avoid direct contact with the battery element, allowing for controlled gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve device is attached to the seal portion to control gas pressure, then gas discharge can be controlled, but the valve device may damage the battery element arranged in the housing body
Solution Approach 1:
The patent introduces a bulge portion as an intermediary structure between the valve device and the battery element. The valve device is attached to the bulge portion rather than directly to the seal portion covering the battery element. This intermediary structure allows the valve device to perform its gas pressure control function while physically separating it from the battery element, preventing direct contact and potential damage.
2Object-generated harmful factors
If gas is removed via the easy-to-peel portion, then gas can escape, but it is difficult to accurately control pressure to remove gas
Solution Approach 1:
The patent replaces the passive mechanical easy-to-peel structure with an active valve device that incorporates a pressure-sensitive membrane and valve mechanism. Instead of relying on structural weakness for gas escape, the valve device uses the elastic deformation of a membrane under pressure to trigger controlled opening, enabling precise pressure control for gas discharge.
3Reliability
If the valve device is positioned to control gas discharge, then pressure control is improved, but the valve device may come into contact with and damage the battery element
Solution Approach 1:
The patent resolves the spatial conflict by utilizing the thickness dimension of the housing body. The bulge portion protrudes in the thickness direction, creating a three-dimensional arrangement where the valve device is positioned on the bulge portion while the battery element remains in the main interior space. This dimensional separation ensures the valve device can function without contacting the battery element.
Data Source
AI summary
A battery includes a battery element, housing body, and valve device. The housing body includes at least one laminate and an interior space wherein the battery element is housed, a first housing portion covers the interior space from a first side in a thickness direction, and a second housing portion that covers the interior space from a second side opposite to the first side in the thickness direction. The valve device attaches to the housing body and makes the interior space communicate with an external space. A joined edge portion is formed in the housing body by the first and second housing portion being fused along respective peripheral edges. The valve device is between the first and second housing portion in the joined edge portion, and an inner end of the valve device protrudes from an inner edge of the joined edge portion toward the interior space.