Compact Battery Pack Structure for Low-Height Electric Power Units
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Solution Overview
Problem
Existing electric power units with battery packs are taller than conventional fuel engines due to their cuboid shape, making it challenging to replace fuel engines while maintaining battery endurance within size limitations.
Innovation Solution
A compact electric power unit design featuring a motor with an arch-shaped supporting frame and a concave battery pack that utilizes space efficiently, incorporating cushion pads and elastic vibration damping bodies to reduce overall height without compromising battery endurance, and includes a battery management system and cylindrical battery cells for stability and vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cuboid battery pack is mounted on top of the motor through a frame, then the battery pack structure is simple and easy to manufacture, but the overall height of the electric power unit increases
Solution Approach 1:
The battery pack bottom surface is designed with a concave portion that matches the arch-shaped supporting portion, transforming the traditional flat cuboid shape into a curved configuration. This curvature enables the battery pack to nestle into the arch-shaped space above the motor, effectively reducing the overall height of the electric power unit while maintaining structural integrity and ease of manufacture
Solution Approach 2:
The concave portion of the battery pack is nested within the arch-shaped supporting portion formed by the supporting frame, creating a nested configuration where the battery pack utilizes the vertical space above the motor more efficiently. This nesting arrangement allows the battery pack to be positioned lower, reducing the overall height without complicating the manufacturing process
2Adaptability or versatility
If the battery pack height is reduced to match fuel engine dimensions, then the electric power unit can replace fuel engines, but the battery endurance may be compromised
Solution Approach 1:
Instead of reducing battery capacity to fit height constraints, the design redistributes battery cells in the horizontal plane by adopting a cylindrical arrangement within the concave portion. This dimensional redistribution allows the battery pack to maintain sufficient energy storage capacity while achieving the reduced height necessary for fuel engine replacement compatibility
3Stability of the object's composition
If cushion pads and elastic vibration damping bodies are added to reduce vibration, then the stability and comfort improve, but the device complexity increases
Solution Approach 1:
The cushion pads and elastic vibration damping bodies are strategically positioned at key mounting interfaces where the battery pack connects to the supporting frame and motor. By concentrating damping functionality at these critical connection points rather than distributing it throughout the entire structure, the design achieves effective vibration reduction while minimizing the increase in device complexity
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 design achieves a more compact and stable electric power unit with reduced height, enabling effective miniaturization and compatibility with fuel engine replacements, while maintaining battery endurance and providing vibration damping for improved performance.
Implementation Method 1
lower parts of both sides of the supporting frame are respectively mounted on the supports on the corresponding sides through elastic vibration damping bodies
Implementation Method 2
elastic vibration damping bodies
Implementation Method 3
cushion pads are arranged between the bottom of the battery pack and the arch-shaped supporting portion, the first mounting portion and the second mounting portion on the supporting frame
Data Source
AI summary
The present invention discloses an electrically-driven power unit of a compact battery pack, which comprises a motor and a battery pack, wherein the motor is mounted on a base, the battery pack is supported on an upper part of the motor through a supporting frame, the supporting frame is shaped around the periphery of the motor, an arch-shaped supporting portion matched with the upper part of the motor is formed on an upper part of the supporting frame, a concave portion matched with the arch-shaped supporting portion is arranged at a bottom of the battery pack, and the arch-shaped supporting portion of the supporting frame is supported in the concave portion of the battery pack. The present invention can reduce the overall height of the electrically-driven power unit on the premise of not reducing the endurance of the battery pack so as to satisfy the overall mounting size limitation.