Pouch Battery Venting Device for Safer Pressure Regulation
Here’s PatSnap Eureka !
Summary
Problems
Pouch-type secondary batteries lack effective pressure regulation mechanisms, leading to potential damage and safety issues due to internal gas buildup, unlike can-type batteries which have protection members like safety vents.
Innovation solutions
A venting device is inserted into the sealing part of the pouch battery, comprising a metal housing, a polymer gasket, and a metal plate spring that opens and closes a passage to release internal gas, with a crimping mechanism for secure assembly, allowing for pressure adjustment.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a protection member is provided in a pouch type secondary battery, then internal pressure can be regulated to prevent damage and safety issues, but the device complexity increases compared to conventional pouch batteries
Why choose this principle:
The venting device is divided into separate functional components: a housing that provides structural support and sealing, a gasket that creates pressure-responsive sealing, and a plate spring that provides the opening force. This segmentation allows each component to be optimized independently while maintaining overall simplicity.
Principle concept:
If a protection member is provided in a pouch type secondary battery, then internal pressure can be regulated to prevent damage and safety issues, but the device complexity increases compared to conventional pouch batteries
Why choose this principle:
The venting device operates autonomously without external control systems. The plate spring automatically opens the passage when internal pressure exceeds the spring force, and automatically closes when pressure normalizes, providing self-regulating pressure protection.
Application Domain
Data Source
AI summary:
A venting device is inserted into the sealing part of the pouch battery, comprising a metal housing, a polymer gasket, and a metal plate spring that opens and closes a passage to release internal gas, with a crimping mechanism for secure assembly, allowing for pressure adjustment.
Abstract
A venting device inserted into a sealing part of a pouch of a secondary battery according to an embodiment of the present invention includes: a housing inserted between confronting surfaces of the sealing part so as to be sealed together with the sealing part, the housing being made from a metal plate; a gasket made of a polymer and disposed in the housing and through which a passage is defined providing gas communication between an inside and an outside of the pouch; and a plate spring made of a metal, the plate spring being disposed in the housing and assembled with the gasket, the plate spring being configured to open and close the passage in response to a change in an internal pressure of the pouch, wherein the housing includes a crimping part crimped together with the gasket on an upper end of the housing.