Vacuum Cleaner Battery Assembly for Air Cooling Without Dust Ingress
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Solution Overview
Problem
Existing vacuum cleaners with battery packs face issues of dust accumulation and moisture ingress, leading to contact failures and short circuits due to air cooling methods, which can cause spark ignition and water contact with secondary batteries.
Innovation Solution
A battery assembly design with spaced-apart battery cells in cell cases and an outer case with flow holes for air circulation, along with a partitioning plate and sealing members to prevent dust and moisture contact, ensuring efficient cooling and protection from external contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air is introduced through the blast port to cool the secondary batteries, then cooling efficiency is improved, but dust and moisture can enter the outer case and cause contact failure or short circuit
Solution Approach 1:
The patent divides the battery assembly into separate compartments using partition walls. Each secondary battery is placed in an independent groove, and partition walls prevent dust and moisture from reaching the electrical contacts between batteries while still allowing air to flow through for cooling purposes.
Solution Approach 2:
The patent introduces a seal member as an intermediary element between the external environment and the battery contacts. This seal member selectively blocks dust and moisture particles while permitting air molecules to pass through, thereby mediating between the cooling requirement and the protection requirement.
2Temperature
If the blast port is opened for air circulation, then cooling performance is improved, but water or moisture can directly contact the secondary battery and generate short circuit
Solution Approach 1:
The patent employs a seal member in the form of a flexible thin film or shell structure that lines the pathways where air flows. This seal member acts as a selective barrier that is permeable to air but impermeable to liquid water and moisture droplets, protecting the secondary batteries from direct contact with harmful fluids while maintaining cooling airflow.
3Device complexity
If secondary batteries are accommodated in grooves of the outer case, then battery support structure is simplified, but dust accumulation in grooves can cause contact failure
Solution Approach 1:
The patent extracts the dust-prone groove structure from the outer case and replaces it with a sealed battery holder design. Each secondary battery is accommodated in a protected compartment with sealed walls, eliminating the open grooves where dust could accumulate and cause contact failure, while maintaining simple structural support.
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
The solution effectively prevents battery cell contact with dust and moisture, enhancing dustproof performance and maintaining battery health by ensuring efficient cooling and protection from external contaminants.
Implementation Method 1
an outer case in which the inner case is accommodated and including a flow hole in which air flows
Data Source
AI summary
A vacuum cleaner may include a cleaner body including a suction motor for generating suction force, a suction unit communicating with the cleaner body and suctioning air and dust, and a battery assembly for supplying power to the suction motor. The battery assembly may include a plurality of battery cells, an inner case including a plurality of cell cases having the plurality of battery cells respectively accommodated therein and spaced apart from each other, and an outer case having the inner case accommodated therein and including a flow hole in which air flows.