EV Battery Pack Drainage Marking for Safe Drilling
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Solution Overview
Problem
Electric vehicle battery packs face challenges in efficiently draining mud, cloudy water, or electrolyte due to the need for larger holes than those used for condensed water, posing safety risks and operational complexities, especially when operators are unfamiliar with the internal structure.
Innovation Solution
The electric vehicle incorporates a mechanism with marked positions on the vehicle body and battery pack indicating where to bore liquid draining holes, using indicators and symbols to guide the operation, ensuring safe and efficient drainage without damaging internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a larger hole is made to drain mud or cloudy water from the battery pack, then the drainage efficiency is improved, but the risk of damaging internal components (cells and wires) increases
Solution Approach 1:
The patent applies preliminary action by pre-marking the safe drilling position on the battery pack case before any drainage operation. The mark indicates a position where no cells or wires are present, allowing operators to quickly drill without needing to study the internal structure. This pre-prepared guidance resolves the contradiction by enabling efficient drainage through a larger hole while ensuring component safety through advance positioning information.
2Ease of operation
If the battery pack is jacked up at the marked position for efficient drainage, then the drainage operation is simplified, but the position must be lower than the jack-up position when inclined, requiring precise mark placement
Solution Approach 1:
The patent resolves this contradiction by considering the spatial relationship in multiple dimensions. The mark is positioned not only horizontally but also vertically at a specific height below the jack-up position. When the battery pack is inclined during drainage, gravity causes the liquid to flow downward, and the pre-positioned mark ensures the drainage hole is at the correct lower elevation. This dimensional approach simplifies operation while maintaining precise positioning requirements.
3Ease of operation
If clear markings are provided to guide drilling positions, then the ease of operation for unfamiliar operators is improved, but the complexity of the battery pack design increases
Solution Approach 1:
The patent applies local quality by adding markings only at the specific location where drainage holes need to be drilled, rather than throughout the entire battery pack. This localized marking approach improves ease of operation for unfamiliar operators by providing clear guidance exactly where to drill, while minimizing the increase in overall design complexity. The marking is a simple visual indicator on the case surface, not a complex structural modification.
Data Source
AI summary
An electric vehicle includes a vehicle body and a battery pack. The vehicle body has in a lower portion thereof a sign showing a specific position to be jacked up. The battery pack is mounted on the lower portion of the vehicle body and includes a bottom wall having a mark showing a position where a liquid draining hole communicating with an inside of the battery pack is to be bored. The mark is disposed at a position lower than the specific position within the vehicle body in a state where the vehicle body is inclined by jacking up the specific position.