Electric Vehicle Battery Pack Handle Offset for Locking
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Solution Overview
Problem
Conventional electric vehicle power supply devices face challenges in increasing battery pack capacity and improving operability during mounting and detaching, while also ensuring secure locking mechanisms, due to space constraints and reduced battery volume.
Innovation Solution
A power supply device with a battery case featuring an extending handle and engagement part for a lock device, allowing for offset mounting and secure locking without reducing battery capacity, utilizing a monocoque-type main frame and pivot system to enhance mass distribution and accommodate more battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle is provided on the battery pack body side, then the locking mechanism can be integrated, but the volume for accommodating battery cells is reduced
Solution Approach 1:
The handle is moved from the battery pack body side to the extending part that protrudes upward, changing the spatial dimension where the handle is located. This allows the handle to be positioned in a space that does not interfere with battery cell accommodation, thus resolving the contradiction between providing a locking mechanism and maintaining battery volume.
2Device complexity
If the handle is disposed in a narrow place between the mounting part and the rear wheel, then the structure can be compact, but the operability for mounting and detaching is poor
Solution Approach 1:
The handle is extracted from the narrow space between the mounting part and rear wheel, and repositioned on the extending part that protrudes upward. This separates the handle from the constrained narrow space, providing adequate room for hand operation while maintaining the overall compact structure of the battery pack.
3Ease of operation
If the extending part is offset toward the left or right of the battery case, then the handle can be positioned for better operability, but the mass concentration is affected
Solution Approach 1:
The extending part is designed with asymmetric offset toward either the left or right side of the battery case, creating a balanced mass distribution that accounts for the asymmetric position of the handle. This asymmetric design allows the handle to be accessible while maintaining proper mass concentration in the electric vehicle.
Data Source
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AI summary
An electric vehicle has a removable battery case 20, that can be fitted into a battery pack cover 28. The battery case 20 has a part 19P extending above a battery cell accommodating part, and this part 19P is provided with a handle 34 including a longitudinal grip part 78. The handle 34 is offset to the left or right (here, the right) with respect to the vehicle. A lock device 32 attached to a main frame 3 of the electric vehicle 1 is has a lock pin 323 which can be advanced and retracted by key operations. The part 19P has an engagement hole 62 for accepting the lock pin 323, and the engagement hole 62 is formed being formed at either the front or the back surface (here, the front) of the handle (34). The battery pack can be locked to a vehicle body and can be mounted to and detached from the vehicle body with high operability.