Battery Pack Venting Cover With Heat-Insulating Flame Discharge
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Solution Overview
Problem
Current battery packs face challenges in effectively discharging gases and flames generated within battery cells while preventing heat propagation between adjacent cells, which can lead to safety and efficiency issues, especially as energy capacity increases.
Innovation Solution
A battery pack design featuring a lower pack frame with mounted battery cell arrays, a cover part, and a venting part that includes strategically positioned venting holes and a heat-insulating frame to guide and discharge gases and flames externally, preventing heat propagation between adjacent cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery pack capacity is increased to improve mileage, then energy storage capability is improved, but safety risk and heat propagation risk increase
Solution Approach 1:
The battery pack is divided into multiple battery modules, each module containing multiple battery cells arranged in series. This segmentation allows the system to achieve high capacity while isolating thermal risks to individual modules, preventing heat propagation across the entire pack.
Solution Approach 2:
A venting part is introduced as an intermediary component between battery cells to capture and redirect gases and flames generated during thermal runaway. This mediator prevents direct heat propagation to adjacent cells while maintaining the high-capacity configuration.
2Reliability
If venting holes are provided on the cover part to discharge gases and flames, then safety is improved, but heat propagation to adjacent battery cells may occur
Solution Approach 1:
The venting part acts as an intermediary structure that intercepts gases and flames discharged through venting holes. It redirects these harmful substances through a designated discharge port away from adjacent battery cells, preventing heat propagation while maintaining effective venting functionality.
Solution Approach 2:
The venting part is strategically positioned and configured to provide localized protection to adjacent battery cells. The discharge port is specifically oriented to direct gases and flames away from vulnerable areas, creating a localized safety zone around each battery module.
3Object-affected harmful factors
If a venting part is added to guide and discharge gases and flames, then heat propagation is prevented, but device complexity increases
Solution Approach 1:
The venting part serves multiple functions: it captures gases and flames from venting holes, redirects them through the discharge port away from adjacent cells, and structurally integrates with the existing battery module framework. This multi-functionality reduces the need for additional separate safety components.
Solution Approach 2:
The venting part is nested within the existing battery module structure, utilizing the cover part and frame as integration points. This nesting approach incorporates the safety function without adding external complexity to the overall battery pack architecture.
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 gases and flames away from the battery pack, enhancing safety and reducing the risk of heat propagation and damage between adjacent cells, thereby improving the structural integrity and operational efficiency of the battery pack.
Implementation Method 1
a heat-insulating frame to guide and discharge gases and flames externally, preventing heat propagation between adjacent cells
Data Source
AI summary
A battery pack includes a lower pack frame on which a plurality of battery cell arrays are mounted; at least one cover part located in an upper part of the plurality of battery cell arrays; and a venting part that is mounted on the cover part and extends along the longitudinal direction of the lower pack frame, wherein the cover part covers the upper part of the pair of battery cell arrays arranged so as to face each other with respect to the width direction of the lower pack frame. A first venting hole is formed on the cover part, and the venting part covers the first venting hole.