CTP Battery Pack Venting Structure for Thermal Runaway Gases
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Solution Overview
Problem
The need for a battery pack that accommodates battery cells in a cell-to-pack (CTP) form with an effective venting path for high-temperature gases or flames generated from the battery cells is increasing, as existing technologies do not adequately address this requirement.
Innovation Solution
A battery pack design that includes a battery housing with a venting passage defined by venting guide parts and a pack cover, featuring a venting sheet with perforated parts and a venting frame, which guides and channels high-temperature gases or flames away from the battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are accommodated in CTP form to increase capacity, then the capacity of battery cells is improved, but the ability to provide an effective venting path for high-temperature gases or flames deteriorates
Solution Approach 1:
The plate is divided into multiple sections with venting guide parts extending in the second direction, creating segmented venting passages between adjacent plates. This segmentation allows the venting path to be integrated within the battery cell stack structure itself, providing effective flame and gas venting while maintaining CTP configuration for high capacity
Solution Approach 2:
The venting guide parts act as intermediary structures that guide and channel high-temperature gases and flames from between battery cells through defined venting passages to the exterior. These guide parts mediate the thermal runaway process by controlling the path of hot gases, preventing uncontrolled propagation while maintaining cell density
2Reliability
If venting guide parts are added to define venting passages, then the safety through effective venting is improved, but the device complexity increases
Solution Approach 1:
The plates serving as structural components of the battery cell stack simultaneously incorporate venting guide parts that form venting passages. This multi-functionality allows the same structural elements to provide both mechanical support and thermal runaway venting, avoiding additional dedicated venting components and reducing overall device complexity
Solution Approach 2:
The venting function is merged with the structural plate components by extending venting guide parts from the plates. This combination integrates the venting system into the existing battery pack structure, eliminating the need for separate venting mechanisms and simplifying the overall device design while maintaining effective safety venting
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 design enhances safety and durability by efficiently venting high-temperature gases or flames, preventing thermal runaway and improving the capacity of battery cells while ensuring user safety and structural integrity.
Implementation Method 1
a plate disposed between the battery cells and having a venting guide part extending in the second direction... A pair of venting guide parts are spaced apart from each other in the first direction in parallel, and the pair of venting guide parts may define a venting passage located between the pair of venting guide parts
Implementation Method 2
a venting sheet disposed between the pair of venting guide parts and having a perforated part including a plurality of cutaway areas disposed along a periphery of an area facing the battery cells... a venting frame including a communication hole disposed on one side of the venting sheet
Data Source
AI summary
An embodiment battery pack includes a battery housing and a battery cell stack accommodated in an interior of the battery housing. The battery cell stack includes battery cells extending in a first direction and arranged in a second direction crossing the first direction and a plate disposed between the battery cells, the plate including a venting guide part extending in the second direction on one side of the battery cells in a third direction crossing the first direction and the second direction of the battery cells.