Portable Power Supply Case Segmentation for Water Ingress
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Solution Overview
Problem
Portable rechargeable power supply devices for air-conditioned and heated cloths face issues with water ingress, which can damage the overcharge prevention circuit, leading to potential explosions or fires, especially when used outdoors in rainy conditions.
Innovation Solution
A portable rechargeable power supply device with a divided case configuration, where the terminal housing case portion and the main body housing case portion are separated by a dividing section, preventing water from leaking from the terminal area into the main body area, thus protecting the hazard prevention section from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a universal jack is used for power supply terminal, then ease of operation is improved, but water ingress risk increases due to openings in the case
Solution Approach 1:
The case is divided into two separate compartments: a terminal housing case portion containing the universal jack and power supply terminal, and a main body housing case portion containing the hazard prevention circuit and battery. This segmentation isolates the water-exposed terminal area from the sensitive electronic components, allowing the universal jack to remain accessible while protecting the circuit board from water ingress.
2Reliability
If the case is made waterproof to prevent water ingress, then reliability is improved, but ease of operation deteriorates due to restricted terminal access
Solution Approach 1:
The case is divided into two separate compartments: a terminal housing case portion containing the universal jack and power supply terminal, and a main body housing case portion containing the hazard prevention circuit and battery. This segmentation isolates the water-exposed terminal area from the sensitive electronic components, allowing the universal jack to remain accessible while protecting the circuit board from water ingress.
3Reliability
If a leather case is shaped to prevent rain water leakage, then reliability is improved, but manufacturing cost increases and ease of operation decreases
Solution Approach 1:
The case is divided into two separate compartments: a terminal housing case portion containing the universal jack and power supply terminal, and a main body housing case portion containing the hazard prevention circuit and battery. This segmentation isolates the water-exposed terminal area from the sensitive electronic components, allowing the universal jack to remain accessible while protecting the circuit board from water ingress.
Data Source
AI summary
Provided is a portable rechargeable power supply device such that major accidents such as from overcharging due to a hazard prevention means being damaged by rain water, or the like can be prevented from occurring. This portable rechargeable power supply device comprises a lithium-ion battery (11), an assembled circuit board (20), and a case (40). Two terminals (31a, 31b), a hazard prevention circuit unit (26), and the like, are provided on the assembled circuit board (20). A terminal housing case portion (416) of the case (40) houses a first portion of the assembled circuit board (20), which is provided with the two terminals (31a, 31b). A main body housing case portion (417) of the case (40) houses the lithium-ion battery (11), and a second portion of the assembled circuit board (20), which is provided with the hazard prevention circuit unit (26), and the like. The terminal housing case portion (416) and the main body housing case portion (417) are separated by a divider plate (414) and a shelving plate (415a). A gap between the divider plate (414) and the assembled circuit board (20) is closed by a gasket member (61).