Swing Arm Battery Mounting for Electric Vehicles
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Solution Overview
Problem
Existing methods for fixing batteries in electric vehicles, such as electric motorcycles, lack efficiency in reducing the number of parts and weight, particularly when integrating with swing arms, which complicates assembly and affects the vehicle's operational performance.
Innovation Solution
A fixing structure for batteries in electric vehicles that utilizes a housing space with a guide groove and potting material, allowing the battery to be securely attached to the swing arm without a dedicated case, reducing weight and parts by using the swing arm itself as a case, and enhancing heat radiation through partial exposure of the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated battery case is used to fix the battery, then the battery is securely fixed, but the number of parts increases and weight increases
Solution Approach 1:
The patent merges the battery case function with the swing arm structure by forming a housing space directly in the swing arm. The swing arm itself serves as both the structural component and the battery mounting structure, eliminating the need for a separate dedicated battery case while ensuring secure fixation through the integrated housing space and guide grooves.
Solution Approach 2:
The swing arm is designed to serve multiple functions: it acts as both the structural linkage component and the battery housing/mounting structure. The housing space formed in the swing arm provides battery fixation, while the swing arm maintains its primary function of supporting the rear wheel and electric motor, thereby reducing overall part count without compromising fixation security.
2Reliability
If a dedicated battery case is used to fix the battery, then the battery is securely fixed, but the weight increases
Solution Approach 1:
By combining the battery housing function with the swing arm structure, the patent eliminates the weight of a separate dedicated battery case. The housing space is formed directly in the swing arm, so no additional materials are required for a separate case, thereby reducing overall vehicle weight while maintaining secure battery fixation through the integrated structure.
3Object-affected harmful factors
If the battery is completely enclosed in the swing arm, then the battery is protected, but heat radiation performance deteriorates
Solution Approach 1:
The patent applies local quality by providing selective openings in specific regions of the housing space rather than completely enclosing the battery. These localized openings allow heat to escape from critical areas while maintaining protection in other regions, achieving a balance between battery protection and heat radiation performance through region-specific design.
4Ease of manufacture
If the battery is inserted from the top, then assembly is simplified, but the battery cannot be easily removed when the rear wheel is installed
Solution Approach 1:
The patent inverts the conventional approach by providing openings in the lateral direction rather than only from the top. This allows the battery to be inserted and removed from the side of the swing arm, which is more accessible when the rear wheel is installed, thereby improving ease of operation while maintaining assembly simplicity through the openable housing structure.
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
This solution reduces the number of parts and weight, simplifies assembly, and improves heat radiation performance, enabling secure fixation and easier handling of batteries while maintaining operational efficiency.
Implementation Method 1
The battery (56) is fixed in the housing space (35) by means of potting material (59). The potting material is resin.
Data Source
AI summary
An electric vehicle is provided with a swing arm one end of which is coupled to a swinging shaft and the other end of which supports a rear wheel. An electric motor is installed on the side of the other end of the swing arm and drives the rear wheel. The swing aim is provided with a housing space provided in the vicinity of the swinging shaft and a guide groove that positions the battery in the housing space, the battery is mounted inside the swing arm by fixing the battery positioned in the housing space via potting material. The housing space is provided with an opening for inserting the battery on the side of the electric vehicle and the battery is inserted and fixed into/to the housing space of the swing aim from the side of the electric vehicle.