Battery Cell Insulation Coating Using Directed Single Drops
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Solution Overview
Problem
Existing methods for coating battery cell housings with electrically insulating materials, such as UV-curable lacquers, involve labor-intensive and inefficient atomized spray applications, leading to material wastage and ecological/economic concerns due to mist and uneven coating.
Innovation Solution
A method using a coating applicator that discharges discrete, uniformly directed single drops of liquid coating material to form precise coating lines on the battery cell housing, eliminating mist and ensuring targeted application with improved efficiency and reduced waste, utilizing components that cure under UV radiation or through polyaddition/polycondensation reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If atomized spray application is used to coat battery cell housings, then coating coverage is achieved, but material wastage increases and ecological impact worsens due to mist escape
Solution Approach 1:
The continuous spray stream is segmented into discrete single drops that are individually directed at the target surface. The coating applicator produces a sequence of separate drops rather than a continuous aerosol mist, allowing precise control over material placement and preventing widespread dispersion.
Solution Approach 2:
The traditional pneumatic spray system is replaced with a mechanical drop-discharge system. Instead of using compressed air to atomize and propel coating material, the invention uses a controlled mechanical mechanism to generate and direct individual drops, eliminating the mist generation inherent in pneumatic spray applications.
2Ease of operation
If atomized spray application is used, then coating is applied to surfaces, but labor effort increases due to screening and cleaning requirements
Solution Approach 1:
The harmful mist component is extracted and eliminated from the coating application process. By discharging discrete drops instead of atomized spray, the system removes the aerosol mist that requires screening and cleaning, leaving only the controlled drop delivery mechanism.
Solution Approach 2:
The coating applicator is designed to self-containedly deliver coating material precisely where needed without requiring external screening structures. The directed drop delivery inherently contains the coating material to the target area, making the system self-sufficient and eliminating the need for additional cleaning operations.
3Manufacturing precision
If continuous stream of coating material is used, then coating application is simplified, but precision and control of coating location deteriorates
Solution Approach 1:
The coating applicator employs dynamic control mechanisms to adjust drop discharge timing, frequency, and trajectory in real-time. This dynamic adaptation allows the system to maintain high precision across varying operating conditions while managing the complexity through intelligent control algorithms.
Solution Approach 2:
The system controls coating precision by dynamically adjusting parameters such as drop size, discharge frequency, and directional angle. By varying these parameters based on real-time feedback and positioning data, the system achieves high manufacturing precision without requiring overly complex mechanical structures.
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
This method achieves precise, uniform, and efficient application of electrically insulating coatings on battery cell housings, minimizing material loss and environmental impact while ensuring high coating quality and reduced operational effort.
Implementation Method 1
it comprises at least one component that cures under radiation, in particular under UV radiation
Implementation Method 2
by applying discretely produced single drops of the coating material. In this case, when they hit an outer surface of the housing, the single drops form coating points
Data Source
AI summary
Due to the dynamic mechanical loads to which motor vehicle traction batteries are subjected, housings of battery cells of the traction batteries are covered at least in part by an electrically insulating layer made from a coating material. For this purpose, a method and a coating station for carrying out the method are proposed. The method is performed with a liquid electrically insulating coating material, by applying separately produced individual drops of the coating material using a coating applicator. The drops form coating points on an outer surface of the housing, which coating points are applied sequentially with the coating applicator, adjacently to one another or overlapping, so that together they form coating lines.