Battery Pack Case Drainage Structure for Cooling Medium Leak Control
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Solution Overview
Problem
When a cooling mechanism is installed inside a battery pack case, the leakage of a conductive cooling medium can lead to a short circuit in battery cells, posing a significant safety risk.
Innovation Solution
A battery pack case design featuring a through hole in the base plate to discharge leaked cooling medium externally, combined with an outer plate forming a separation space to contain and guide the medium, and a filtering mechanism to block foreign substances, thereby preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling mechanism is installed inside the battery pack case, then cooling performance is improved, but the risk of short circuit due to cooling medium leakage increases
Solution Approach 1:
The battery pack case is divided into a first case and a second case, with the cooling mechanism installed in the first case. The second case serves as a protective enclosure that isolates the battery cells from the cooling medium, segmenting the system into functional zones to prevent direct contact between leaked cooling medium and electrical components.
Solution Approach 2:
The second case acts as an intermediary barrier between the cooling mechanism and the battery cells. This intermediate structure prevents direct interaction between the cooling medium and electrical components, allowing the cooling system to function while eliminating the short circuit risk associated with medium leakage.
2Reliability
If the battery pack case is sealed to protect internal components, then protection performance is improved, but the ability to discharge leaked cooling medium deteriorates
Solution Approach 1:
A discharge hole is provided in the second case to extract and remove the cooling medium from the enclosed space. This opening allows the harmful cooling medium to be taken out and discharged to the external environment, preventing accumulation while maintaining the protective sealing of the battery pack case.
Solution Approach 2:
The discharge hole converts the harmful effect of cooling medium leakage by providing a controlled escape path. Instead of allowing uncontrolled leakage or accumulation that could cause short circuits, the system channels the leaked medium through a designated route to the exterior, transforming a potential hazard into a managed discharge process.
3Reliability
If a through hole is added to discharge cooling medium, then short circuit prevention is improved, but structural integrity deteriorates
Solution Approach 1:
The discharge hole is localized to a specific position in the second case rather than compromising the entire structure. By concentrating the opening in a non-critical area, the local modification provides short circuit prevention while minimizing impact on the overall structural integrity of the battery pack case.
Solution Approach 2:
The discharge hole is positioned and oriented in a specific spatial dimension that minimizes structural impact. By strategically locating the opening in the second case away from load-bearing areas, the design achieves functional requirements while preserving structural strength through dimensional positioning.
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
Effectively discharges leaked cooling medium to prevent short circuits and contains foreign substances, enhancing safety and reducing fire spread.
Implementation Method 1
a through hole formed in a base plate... connecting an internal space of the battery pack case with outside of the battery pack case
Implementation Method 2
a filtering mechanism... configured to block foreign substances from entering the separation space
Data Source
AI summary
Disclosed are a battery pack case including a base plate forming one side of the battery pack case and having a through hole connecting an internal space of the battery pack case with outside of the battery pack case, and an outer plate spaced apart from an outer surface of the base plate and blocking the through hole from being exposed to the outside and forming a separation space between the base plate and the outer plate. Also disclosed are a battery pack including the same, and a vehicle.