Vacuum Cleaner Battery Assembly With Sealed Air-Cooled Cell Cases
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Solution Overview
Problem
Existing battery packs in vacuum cleaners are prone to contact failure and short circuits due to dust and moisture accumulation, which can lead to spark ignition and short circuits, especially when air cooling is used.
Innovation Solution
A battery assembly with an inner case having cell cases that are spaced apart to prevent direct contact with air, water, or moisture, and an outer case with flow holes for efficient cooling, along with a battery management unit and partitioning plate to manage heat and prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If secondary batteries are spaced apart and cooled by air introduced through the blast port, then cooling efficiency is improved, but dust accumulates in the groove causing contact failure or spark ignition
Solution Approach 1:
The battery pack is divided into separate compartments: an outer case with blast ports for air intake, an intermediate case with grooves that hold batteries spaced apart, and an inner case that seals the batteries. This segmentation allows air to flow for cooling while preventing dust from reaching the batteries and their electrical contacts.
Solution Approach 2:
The intermediate case acts as an intermediary structure between the outer case (air intake) and the inner case (battery protection). It provides grooves that maintain battery spacing for cooling while the inner case serves as a protective barrier that prevents dust and moisture from contacting the batteries, thus mediating between cooling requirements and protection needs.
2Temperature
If the blast port is opened for air cooling, then cooling performance is improved, but water or moisture enters and causes short circuit
Solution Approach 1:
The battery pack structure is segmented into three cases: the outer case with blast ports allows air flow for cooling, the intermediate case provides structural support and battery positioning, and the inner case creates a sealed environment around the batteries. This segmentation enables the blast port to remain open for cooling while the inner case prevents water and moisture from reaching the batteries.
Solution Approach 2:
The inner case serves as a protective intermediary that seals around the batteries, preventing water and moisture from the external environment (introduced through the blast port) from contacting the batteries and causing short circuits, while still allowing the cooling air to flow through the outer case.
3Stability of the object's composition
If batteries are accommodated in a groove structure, then battery positioning is improved, but dust accumulates in the groove causing contact failure
Solution Approach 1:
The battery pack is segmented into an outer case, intermediate case with grooves, and inner case. The grooves in the intermediate case provide stable battery positioning, while the inner case seals around the batteries to prevent dust from accumulating in the grooves and causing contact failure.
Solution Approach 2:
The inner case acts as a protective intermediary that seals around the batteries positioned in the grooves of the intermediate case, preventing dust from the external environment from accumulating in the grooves and causing contact failure, while maintaining the positioning function of the grooves.
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 water or moisture while ensuring efficient cooling, enhancing dustproof performance and preventing short circuits, thus improving the reliability of the vacuum cleaner's power supply.
Implementation Method 1
an outer case in which the inner case is accommodated and including at least one flow hole through which air flows
Data Source
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AI summary
A vacuum cleaner includes a cleaner body (10) including a suction motor (210) for generating suction force, a suction unit communicating with the cleaner body and suctioning air and dust, and a battery assembly (120) for supplying power to the suction motor. The battery assembly (120) includes a plurality of battery cells (170), an inner case (140) including a plurality of cell cases (143) having the plurality of battery cells (170) respectively accommodated therein and spaced apart from each other, and an outer case (121) having the inner case accommodated therein and including a flow hole (122) in which air flows.