Battery Pack Venting Cover With Reflection Plate for Thermal Runaway
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Solution Overview
Problem
Existing battery systems face challenges in safely managing thermal runaway, which can lead to destructive reactions, injury, and damage due to inadequate heat dissipation and venting of hot, toxic gases, posing risks to bystanders and surrounding components.
Innovation Solution
A battery system design featuring a housing cover with a guide projection to direct venting gases away from the venting exit, a reflection plate to reduce heat absorption, and a cell cover element to protect electrical connectors, along with an air gap for thermal insulation, effectively managing thermal runaway by cooling and redirecting gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If thermal runaway venting is allowed to occur freely, then the venting gas stream can escape, but the outer surface temperature increases causing injury risk and ignition hazard
Solution Approach 1:
A reflection plate is introduced as an intermediary component between the venting channel and the outer housing surface. This plate reflects thermal radiation away from the housing, preventing heat accumulation at the outer surface while still allowing the venting gas stream to escape through the venting channel.
Solution Approach 2:
The reflection plate converts the harmful thermal radiation from the venting gas stream into a beneficial direction by reflecting it away from the housing. The heat that would otherwise damage the housing or injure bystanders is redirected, transforming a harmful effect into a controlled thermal management solution.
2Temperature
If thermal radiation is allowed to spread freely, then heat dissipation occurs, but surrounding components may ignite
Solution Approach 1:
The reflection plate serves as a thermal radiation intermediary that intercepts and redirects heat away from surrounding components. By positioning the plate between the hot venting gas and the external environment, it prevents direct thermal exposure to nearby parts while maintaining controlled heat dissipation.
3Temperature
If a reflection plate is added to reduce heat absorption, then outer surface temperature decreases, but device complexity increases
Solution Approach 1:
The reflection plate is integrated into the existing housing structure, serving multiple functions: it reflects thermal radiation, structurally supports the venting channel configuration, and maintains the sealed enclosure. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 solution significantly reduces the risk of injury and ignition by minimizing the outer surface temperature of the battery system, ensuring safer handling and operation during thermal runaway events.
Implementation Method 1
a reflection plate arranged at a backside of the housing cover... An air gap is formed between the reflection plate and the guide projection of the housing cover
Implementation Method 2
An air gap is formed between the reflection plate and the guide projection of the housing cover
Data Source
AI summary
A battery system includes: a battery pack including a housing, a battery cell accommodated within the housing, a housing cover sealing the battery pack with the housing, and a reflection plate arranged at a backside of the housing cover. The battery cell has a venting exit in a venting side, and the housing cover forms a venting channel and includes a guide projection on a frontside thereof. The guide projection projects towards the venting exit into the venting channel and is configured to guide a venting gas stream exhausted through the venting exit into the venting channel. An air gap is formed between the reflection plate and the guide projection.