Battery Pack Drain Hole Protection During Heat Dissipation
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Solution Overview
Problem
In battery packs, the heat dissipation body often blocks the drain hole of the battery module, preventing the discharge of electrolyte and moisture generated inside the module.
Innovation Solution
A blocking part is integrated into the battery module to prevent the heat dissipation body from entering the drain hole, ensuring stable discharge of electrolyte and moisture through the formation of a blocking part that surrounds the area except for the drain hole, made from materials with restoring force and moisture absorption capabilities, such as polyurethane, and optionally coated with an insulator like polyethylene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipation body is provided between the battery module and the plate, then heat dissipation performance is improved, but the drain hole may be blocked by the heat dissipation body
Solution Approach 1:
The bottom surface of the module case is segmented into different functional zones: a drain hole formation zone (first area) and a blocking part formation zone (second area). This segmentation allows the drain hole to be clearly defined and protected from blockage by the heat dissipation body, while still maintaining effective heat dissipation through the blocking part that surrounds but does not obstruct the drain hole.
Solution Approach 2:
A blocking part is introduced as an intermediary element between the heat dissipation body and the drain hole. This blocking part acts as a mediator that prevents the heat dissipation body from directly blocking the drain hole, while still allowing the heat dissipation body to perform its heat dissipation function. The blocking part can be integrated into the module case or provided as a separate component.
2Device complexity
If the blocking part is integrated with the bottom surface of the module case, then structural complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The blocking part is merged with the module case to form an integrated structure. This combining of components reduces the overall structural complexity by eliminating separate parts and assembly steps. The blocking part and module case are formed as a single integrated component, either through co-molding or by integrating the blocking part into the case structure during manufacturing.
3Quantity of substance
If the blocking part is made of a material capable of absorbing moisture, then moisture discharge function is improved, but material selection constraints increase
Solution Approach 1:
The blocking part is made from a porous material that possesses moisture absorption capabilities. The porous structure allows the blocking part to absorb and manage moisture generated during battery operation, preventing moisture accumulation while maintaining the blocking function. Examples of suitable materials include porous polyurethane or other porous polymers that provide both blocking and moisture management functions.
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 blocking part effectively prevents the heat dissipation body from blocking the drain hole, allowing for stable discharge of electrolyte and moisture, enhancing the battery pack's operational efficiency and preventing contamination.
Implementation Method 1
the blocking part may be made of a material capable of absorbing moisture
Implementation Method 2
a heat dissipation body provided between the battery module and the plate
Data Source
AI summary
A battery pack and a method of manufacturing the same are provided. The battery pack includes a battery module in which a drain hole is formed in a bottom surface thereof, a plate disposed on a top surface of the battery module, a heat dissipation body provided between the battery module and the plate, and a blocking part provided between the battery module and the plate to prevent the heat dissipation body from being introduced into the drain hole.