Battery Pack Inner Frame Venting for Heat Propagation Isolation
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Solution Overview
Problem
Current battery packs face challenges in effectively discharging gases and flames generated within battery modules while preventing heat propagation between adjacent modules, which can lead to safety issues and reduced efficiency.
Innovation Solution
A battery pack design featuring a lower and upper pack frame with venting holes and rupture parts that guide and discharge gases and flames externally, preventing heat propagation by partitioning modules and using gasket parts for sealing and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery modules are closely arranged to increase capacity, then energy density is improved, but heat propagation between modules increases
Solution Approach 1:
The battery pack is divided into multiple independent battery modules, each surrounded by protective frames and heat-resistant materials. This segmentation creates physical barriers that prevent heat propagation between modules while maintaining close arrangement for high capacity.
Solution Approach 2:
Heat-resistant gasket parts and insulating materials are introduced as intermediary elements between adjacent battery modules. These intermediaries act as thermal barriers that block heat transfer while allowing the modules to remain closely spaced for maximum energy density.
2Reliability
If venting holes are added to discharge gases, then safety is improved, but structural complexity increases
Solution Approach 1:
The venting function is merged into the existing protective frame structure of the battery modules. The frame itself incorporates venting holes and rupture parts, eliminating the need for separate venting components and reducing overall structural complexity.
Solution Approach 2:
The protective frame serves multiple functions: mechanical protection, heat insulation, and gas venting. By making the frame multi-functional, the design avoids adding separate components for each function, thereby maintaining structural simplicity while improving safety.
3Reliability
If rupture parts are designed to release pressure, then safety is improved, but manufacturing precision requirements increase
Solution Approach 1:
The rupture parts are designed with specific geometric parameters and material properties that enable predictable pressure release. By carefully selecting and standardizing these parameters, the design achieves reliable safety function while maintaining manufacturability within standard tolerances.
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 effectively directs and discharges gases and flames outside the battery pack, enhancing safety by preventing heat propagation between adjacent modules and protecting electrical components.
Implementation Method 1
the inner frame includes at least one venting hole that penetrates an outer surface of the inner frame, and wherein the inner frame serves as a path through which a gas generated in the at least one of the plurality of battery modules moves
Implementation Method 2
preventing a heat propagation phenomenon between adjacent battery modules when gas and flame are generated in a part of battery modules
Data Source
AI summary
A battery pack of the present disclosure includes a lower pack frame on which a plurality of battery modules are mounted; and an upper pack frame located on an upper part of the plurality of battery modules, wherein the lower pack frame includes a bottom part in contact with a lower surface of the plurality of battery modules and a frame part in contact with at least one side surface of at least one of the plurality of battery modules, wherein the frame part comprises a side surface frame extending from an edge of the bottom part toward the upper part, and an inner frame located inside the side surface frame, wherein the inner frame includes at least one venting hole that penetrates an outer surface of the inner frame, and wherein the inner frame serves as a path through which a gas generated in the at least one of the plurality of battery modules moves.