Electric Truck Frame Layout for Larger Between-Rail Battery Packs
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Solution Overview
Problem
Conventional truck ladder frames restrict battery placement between side rails, limiting the capacity of batteries in electric trucks due to the need for cross members to ensure strength and rigidity, which interferes with battery placement.
Innovation Solution
An electric truck frame design with elastic support sections on the side rails to secure the battery, prohibiting cross members in the battery region, thereby increasing battery capacity while maintaining frame rigidity and strength by reducing stress from twisting and lateral bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cross members are provided at predetermined positions in side rails to ensure frame strength and rigidity, then the feasibility of the truck frame is secured, but the battery placement space between side rails is restricted
Solution Approach 1:
The patent extracts the cross members from the battery region, specifically positioning them at the front and rear ends of the battery placement area. This separation allows the battery to occupy the maximum space between side rails without interference from cross members, directly resolving the contradiction between frame strength requirements and battery capacity.
Solution Approach 2:
The patent optimizes the spatial arrangement by positioning cross members at the extreme front and rear positions along the longitudinal axis, effectively using the longitudinal dimension to accommodate both structural requirements and battery space needs. This dimensional strategy maximizes the available volume for battery placement while maintaining frame integrity.
2Stability of the object's composition
If cross members are provided to ensure frame rigidity, then the frame can withstand twisting and lateral bending, but the battery capacity cannot be increased sufficiently
Solution Approach 1:
The patent extracts cross members from the battery region and repositions them at the front and rear ends of the battery placement area. This extraction eliminates interference with battery placement while preserving frame rigidity through strategic positioning at critical structural locations.
Solution Approach 2:
The patent performs preliminary positioning of cross members at the front and rear ends of the battery region before battery installation. This preliminary arrangement ensures that the structural framework is established with optimal rigidity while pre-defining the maximum available space for battery placement.
3Volume of moving object
If the battery is placed between the side rails, then the battery capacity can be increased compared to outer side placement, but the battery placement is restricted by cross member positions
Solution Approach 1:
The patent extracts cross members from the battery placement region and repositions them at the extreme front and rear positions. This extraction creates an uninterrupted battery placement zone between side rails, maximizing both battery capacity and placement flexibility without structural interference.
Solution Approach 2:
The patent utilizes the longitudinal dimension of the frame by positioning cross members at the extreme front and rear positions, thereby freeing up the intermediate longitudinal space between side rails for optimal battery placement. This dimensional strategy maximizes battery volume while maintaining structural integrity.
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 allows for a larger battery capacity without compromising the structural integrity of the truck frame, enhancing both the rigidity and strength of the frame while maximizing battery space and reducing stress on the frame and battery.
Implementation Method 1
the side rails include a plurality of elastic support sections that elastically support both ends of the battery in a vehicle width direction
Data Source
AI summary
An electric truck frame of an electric truck driven by electric power supplied from a battery includes a pair of side rails supporting a cab that are coupled by a plurality of cross members. The battery is disposed between the pair of side rails at a rear side of the cab. The pair of side rails include a plurality of elastic support sections that elastically support both ends of the battery in an electric truck width direction in a battery region in which the battery is disposed between the pair of side rails. The plurality of cross members are prohibited from being placed in the battery region.