Battery Pack Drainage Float for Moisture-Blocking Water Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery pack drainage systems fail to efficiently drain small amounts of water and prevent moisture permeation, leading to potential electrical shorts and reduced power efficiency due to their complex structure and high production costs.
Innovation Solution
A drainage system with a floating body and guide part that uses buoyancy to maintain a constantly open drainage hole for efficient water discharge and closure during external water levels, preventing moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded cap is used to close the drainage hole, then the drainage system can prevent water ingress when no water is present, but it fails to drain small amounts of water and has complex structure with high production cost
Solution Approach 1:
The patent removes the complex spring-loaded cap mechanism and replaces it with a simple floating body that directly closes the drainage hole through buoyancy. This extracts the essential function (preventing water ingress) while eliminating unnecessary components (spring, cap, complex linkage), thereby reducing structural complexity and production cost while maintaining reliability.
Solution Approach 2:
The floating body automatically responds to water level changes through buoyancy forces, closing the drainage hole when water rises and opening it when water drains. This self-service mechanism eliminates the need for external actuators, springs, or complex control systems, simplifying the structure while ensuring reliable operation.
2Stability of the object's composition
If a spring-loaded cap is used to close the drainage hole, then the drainage system can maintain structural stability, but it cannot drain small amounts of water due to insufficient buoyancy force
Solution Approach 1:
The patent changes the operating principle from spring force (mechanical) to buoyancy force (fluid dynamic). By designing the floating body with appropriate volume and density, the system achieves sufficient closing force for small water amounts while maintaining structural stability. The buoyancy force naturally scales with water level, enabling efficient drainage of any water quantity.
3Productivity
If the drainage hole is kept open to drain small water amounts, then drainage efficiency is improved, but external moisture can permeate into the battery pack
Solution Approach 1:
The drainage hole closure state dynamically responds to water level changes through the floating body's buoyancy. When external water rises, the floating body automatically closes the hole to prevent permeation; when internal water needs draining, the hole remains open. This dynamic adaptation resolves the contradiction between drainage efficiency and moisture protection.
Solution Approach 2:
The floating body acts as an intermediary between the drainage system and the environment, sensing water level changes and automatically adjusting the drainage hole closure state. This intermediary mechanism enables the system to efficiently drain internal water while preventing external moisture ingress without requiring complex control systems.
4Reliability
If a complex drainage system with multiple components is used, then water ingress prevention is improved, but production cost increases and installation becomes difficult
Solution Approach 1:
The patent extracts only the essential function (water level-responsive closure) and implements it with a simple floating body. By removing unnecessary components (springs, caps, linkages, sensors), the system achieves reliable water ingress prevention with minimal parts, significantly reducing production cost and simplifying installation while maintaining effectiveness.
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 system ensures immediate discharge of small water amounts and prevents external moisture from entering the battery pack, addressing issues of electrical shorts and power efficiency while being cost-effective and easily installable.
Implementation Method 1
a floating body (120) which is elevated when water is introduced into the body (110) to close the drainage hole (510)
Implementation Method 2
cap inserted into the hole from the outside of the bottom surface of the case of the battery pack... receives force pushed by elastic force of the spring to thereby be stably inserted and supported into the hole
Data Source
AI summary
Provided is a battery pack including a drainage system capable of efficiently discharging water collected inside the battery pack using buoyancy, preventing moisture permeation from the outside, and being implemented in a simple structure to maximize economical feasibility. The battery pack includes a battery pack case having a battery pack embedded therein and having a drainage hole formed in one side thereof; and a drainage system including a body provided to be concatenated with one side of the battery pack case of a position corresponding to the drainage hole and a floating body accommodated in the body and elevated by an introduced fluid to close the drainage hole.