Battery Valve Venting Structure for Outward Gas Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing battery pack designs suffer from accelerated deterioration of the outer layer of the storage body due to gas released from the safety valve contacting the battery pack's side face, leading to degradation of surrounding components.
Innovation Solution
A valve device is attached to the storage body with a gas passage part that directs gas release outward of the storage body periphery, incorporating a valve mechanism with controlled helium leakage to prevent moisture ingress and ensure effective gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the safety valve is formed on the sealing plate for sealing the battery can, then the internal pressure can be reduced when gas is produced, but the released gas contacts the side face of the battery pack causing deterioration of the outer layer
Solution Approach 1:
The valve device main body is extended in the radial direction outward from the storage body, changing the spatial dimension of gas release from the sealing plate surface to an external position. This dimensional extension allows gas to be discharged away from the storage body, preventing contact with the outer layer while maintaining pressure reduction functionality
Solution Approach 2:
A gas passage part is introduced as an intermediary component between the attachment part and the valve device main body. This gas passage part provides a dedicated pathway that directs gas flow away from the storage body, mediating between the internal pressure relief need and the external gas discharge location to prevent deterioration
2Object-affected harmful factors
If the valve device main body is located outward of the storage body periphery, then gas release away from the storage body is achieved, but the device complexity increases
Solution Approach 1:
The attachment part, gas passage part, and valve device main body are merged into a single integrated valve device assembly. This combining of multiple functional components into one unit achieves gas release away from the storage body while minimizing the increase in device complexity through unified design
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 solution suppresses deterioration of the storage body's outer layer by releasing gas away from the body and reducing moisture penetration, maintaining the battery's integrity while controlling costs through reduced valve components.
Implementation Method 1
The gas passage part is provided between the attachment part and the valve device main body, and is configured to allow gas that passes through the attachment part to pass through the valve device main body
Implementation Method 2
the gas passage part may also be configured to hold a drying agent thereinside. According to this valve device, since the drying agent is held inside the gas passage part, even if moisture vapor penetrates into the valve device main body, the influence of the penetration of moisture vapor into the gas passage part can be reduced
Data Source
AI summary
A valve device and an assembled battery according to which even if the valve device operates, deterioration of an outer layer of a storage body is unlikely to be accelerated. The valve device is attached to a first storage body that stores a battery. The valve device includes an attachment part, a valve device main body, and a gas passage part. The attachment part is attached to the first storage body. The valve device main body reduces pressure inside the first storage body in a case where the pressure increases due to gas produced inside the first storage body. The gas passage part is between the attachment part and the valve device main body, and allows gas that passes through the attachment part to pass through the valve device main body. The valve device main body is located outward of an outer periphery of the first storage body.