Power Supply Case Partition Wall Connecting Hole Positioning
Solution Overview
Problem
In power supply systems, water leakage from the power conversion device's internal space to the battery unit's internal space occurs through a connecting hole in the partition wall, posing risks to the electrical components and reliability of the system.
Innovation Solution
The power supply system design includes a case with a partition wall having a connecting hole positioned above an opening portion that can be closed by a lid member, along with coolant supply and discharge ports, to prevent water accumulation and leakage, ensuring the coolant is managed effectively and the relay is protected from water exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connecting hole is formed in the partition wall to electrically connect the power conversion device and battery unit, then electrical connectivity is achieved, but water leakage risk increases
Solution Approach 1:
The patent applies preliminary action by positioning the connecting hole above the opening portion before any water accumulation can occur. This proactive design ensures that even if water enters the first internal space, it cannot reach the connecting hole to cause leakage to the second internal space, thus resolving the contradiction between maintaining electrical connectivity and preventing water leakage
Solution Approach 2:
The opening portion acts as an intermediary element between the external environment and the connecting hole. By providing a controlled access point that can be opened or closed, it mediates the potential water intrusion path, allowing maintenance access when needed while preventing water from reaching the critical connecting hole during normal operation
2Object-affected harmful factors
If the opening portion is kept closed to prevent water entry, then water protection is improved, but maintenance accessibility deteriorates
Solution Approach 1:
The opening portion is designed as a dynamic element that can transition between closed and open states. When closed, it provides water protection; when opened, it allows maintenance personnel to access the interior for servicing. This dynamic characteristic resolves the contradiction by providing both protection and accessibility at different times as needed
Data Source
AI summary
A power supply system includes a power conversion device, a battery unit that is electrically connected to the power conversion device via a wiring, and a case. The case includes a first case portion that defines a first internal space for housing the power conversion device, a second case portion that defines a second internal space for housing the battery unit, and a partition wall portion that separates the first internal space and the second internal space from each other and has a connecting hole that connects the first internal space and the second internal space to each other. The first case portion has an opening portion that opens downward. The connecting hole is positioned above the opening portion. The power supply system further comprising a lid member that is capable of opening and closing the opening portion.