Outward-Moving Battery Pack Venting Cover for Thermal Isolation
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Solution Overview
Problem
Lithium secondary batteries used in electric vehicles and energy storage systems are vulnerable to thermal events, which can lead to thermal runaway, causing chain reactions and potential accidents due to the generation of high-temperature gas, flame, and heat, posing risks to nearby users.
Innovation Solution
A battery pack design with a venting cover that moves outward to facilitate the upward or forward discharge of gas, flame, and particles, incorporating elastic members and bending portions to enhance venting control and insulation, minimizing heat transfer to neighboring modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery modules are densely stored to increase output and capacity, then productivity and energy density are improved, but thermal safety deteriorates due to increased risk of thermal chain reactions
Solution Approach 1:
The battery pack is divided into multiple battery modules that are spatially separated and independently managed. Each module can be individually vented through dedicated venting covers, preventing thermal propagation between modules while maintaining high capacity through parallel configuration.
Solution Approach 2:
Venting covers act as intermediary components between battery modules and the external environment. These covers provide a controlled interface for thermal event discharge, allowing harmful substances to be directed away from neighboring modules while maintaining the dense packing configuration.
2Reliability
If venting covers are made movable to facilitate thermal event discharge, then thermal safety is improved, but device complexity increases
Solution Approach 1:
The venting cover is designed with movable capability to dynamically respond to thermal events. The cover can transition from a closed state during normal operation to an open state during thermal events, allowing controlled discharge of harmful substances while maintaining a simple overall structure without complex actuation mechanisms.
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 facilitates venting control, suppresses thermal runaway, and reduces the risk of accidents by preventing heat propagation to neighboring battery modules, enhancing thermal safety.
Implementation Method 1
the venting cover configured such that at least a portion of the venting cover is movable in an outward direction of the battery module
Implementation Method 2
the battery module configured to enable upward venting of at least one of gas, flame, particles and heat
Implementation Method 3
upward venting of at least one of gas, flame, particles and heat
Implementation Method 4
capable of suppressing or blocking heat propagation to neighboring battery modules when a thermal event occurs
Data Source
AI summary
A battery pack may include: a case having a base plate and configured to provide an inner space; a battery module located inside the case; and a venting cover coupled to the case, the venting cover covering at least one surface of the battery module, and the venting cover configured such that at least a portion of the venting cover is movable in an outward direction of the battery module.