Battery Module Drainage Structure for Condensation Leakage Prevention
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Solution Overview
Problem
Battery modules are prone to dangerous phenomena such as electric leakage, short circuit, fire, and explosion due to condensed water drops on nuts and bus bars that can flow into the module in low temperature environments.
Innovation Solution
A battery module design incorporating a drainage structure with a water storage tank, through holes, and water outlet holes, positioned above the end plate and connected to the pole terminal and bus bar, allowing water to flow into the tank and exit the module, preventing accumulation and potential hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery module operates in a low temperature environment, then the electrical connection function is maintained, but water condensation occurs on the nut and bus bar which may flow into the battery module causing electric leakage, short circuit, fire or explosion
Solution Approach 1:
The drainage structure extracts water condensation from the battery module environment by providing a dedicated collection path. The water storage tank captures condensed water on the bus bar and nut, preventing it from flowing into the module interior through the connecting member penetration hole.
Solution Approach 2:
The drainage structure acts as an intermediary system between the condensation source (bus bar and nut) and the potential contamination zone (module interior). It mediates by intercepting and redirecting water flow through the water storage tank and drainage hole to the exterior environment.
2Reliability
If a drainage structure is added to prevent water accumulation, then safety is improved, but the device complexity increases
Solution Approach 1:
The drainage structure is merged with the existing bus bar assembly by integrating the water storage tank onto the bus bar and using the connecting member penetration hole as part of the drainage pathway. This combination approach adds drainage functionality without requiring completely separate structural components.
Solution Approach 2:
The connecting member penetration hole serves dual functions: electrical connection (allowing the connecting member to pass through) and water drainage (allowing condensed water to exit through the drainage hole in the water storage tank). This multi-functionality reduces the need for additional dedicated drainage components.
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 prevents water accumulation on the bus bar and nut, thereby eliminating the risk of electric leakage, short circuit, fire, and explosion by ensuring water drainage from the module, enhancing safety and reliability.
Implementation Method 1
When the battery module is in a low temperature environment, moisture in air may be condensed into a water drop on the nut and the bus bar
Implementation Method 2
water drop may be condensed larger and larger, and is likely to flow into the battery module
Data Source
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AI summary
The invention relates to the field of power battery technologies, and more particularly, to a battery module. By arranging a drainage structure on an external wall of a cover plate, some water drops on a connecting member and a bus bar can flow into a water storage tank of the drainage structure, and water in the water storage tank can flow out of the battery module through a first water outlet hole and a second water outlet hole, thus solving a problem of dangerous phenomena such as electric leakage, short circuit, fire and explosion, and the like of the battery module caused by water drops condensed on a nut of a pole and the bus bar which may flow into the battery module.