Electric Scooter Controller Case Integration and Thermal Management
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Solution Overview
Problem
Conventional electric scooter controlling systems require significant space due to the separation of the motor case and circuit board box, which limits compact design and effective heat dissipation.
Innovation Solution
Integration of a circuit board within the motor case with a recessed portion to reduce size and a heat dissipating room with lubricant for efficient heat transfer, allowing the circuit board to be closer to the driving shaft and enhancing heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit board is mounted in a separate box from the electric motor, then the electrical connection is stable, but the space required increases significantly
Solution Approach 1:
The patent merges the previously separate box for the circuit board with the case for the electric motor into a single integrated housing. The circuit board is mounted directly on the case wall, eliminating the need for a separate box and reducing overall space while maintaining electrical connection stability through direct mounting and wired connections.
2Volume of stationary object
If the circuit board is placed inside the case with the electric motor, then space is reduced, but the case size must increase to accommodate the rectangular circuit board
Solution Approach 1:
The patent applies local quality by creating a specific mounting area on the case wall dedicated to the circuit board. The circuit board is mounted on an inner wall of the case, utilizing otherwise unused space. This localized mounting approach allows the circuit board to be accommodated without increasing the overall case dimensions, as it fits into the existing case structure rather than requiring additional external space.
3Volume of stationary object
If the circuit board is positioned closer to the driving shaft, then the case size is reduced, but heat dissipation becomes more difficult
Solution Approach 1:
The patent resolves the heat dissipation issue by utilizing the third dimension (vertical space) rather than increasing horizontal distance. A heat dissipation channel is formed extending from the circuit board mounting area toward the driving shaft area, allowing hot air to rise and be discharged through the top of the case. This vertical heat dissipation path enables close positioning of the circuit board while maintaining effective thermal management through natural convection.
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 reduces the overall size of the electric scooter's case while improving heat dissipation through the lubricant-filled heat dissipating room, optimizing space usage and thermal management.
Implementation Method 1
the case further has a heat dissipating room on an opposite side of the mounting room to dissipate a heat of the circuit board
Implementation Method 2
a dedicated heat dissipating room filled with lubricant for enhanced heat transfer
Data Source
AI summary
A controlling system of an electric scooter includes a case having a mounting room therein; and a circuit board received in the mounting room of the case, and having a recess portion at an edge thereof. A driving shaft of an electric motor has at least a section in the mounting room of the case and received in the recess portion of the circuit board. It may reduce a size of the case.