Battery Holder Three-Point Mounting for Vehicle Frame Torsion
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Solution Overview
Problem
Existing solutions for securing high-voltage batteries in vehicle frames fail to consistently decouple torsional moments, leading to instability and durability issues under varying environmental conditions, and require significant assembly effort.
Innovation Solution
A 3-point bearing system with kinematic joints, including pivot and translational degrees of freedom, is used to mount the battery holder between longitudinal beams, allowing for relative movement and reducing torsional loads while maintaining stable mechanical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastic mounting is used to reduce bending and torsional forces on the battery device, then the influence of frame deformation is reduced, but the mounting lacks consistent bearing properties and has limited durability
Solution Approach 1:
The patent replaces the elastic mounting system with a kinematic mounting system using spherical joints and bearing points. This substitution transitions from a flexible, deformation-absorbing mechanical system to a rigid, geometry-based system that maintains consistent bearing properties while still decoupling torsional moments through the kinematic constraints of the spherical joints.
Solution Approach 2:
The patent changes the mounting parameters from elastic deformation characteristics to fixed geometric constraints defined by spherical joints. The bearing points are positioned at specific locations on the longitudinal members, creating a determinate kinematic system with consistent mechanical properties independent of environmental conditions.
2Ease of operation
If the vehicle frame is designed to be torsionally flexible for better handling characteristics, then handling and durability are improved, but the battery mounting cannot reliably decouple torsional moments
Solution Approach 1:
The patent introduces spherical joints as intermediary elements between the battery holder and the vehicle frame. These joints act as mediators that allow the frame to remain torsionally flexible for handling while preventing torsional moments from being transmitted to the battery. The spherical joints accommodate frame deformation through their rotational degrees of freedom while maintaining a stable mechanical connection.
Solution Approach 2:
The patent employs dynamic kinematic joints rather than static rigid connections. The spherical joints provide rotational freedom that adapts to frame movements and torsional deformations, allowing the mounting system to dynamically respond to frame flexion while maintaining consistent bearing properties and protecting the battery from torsional loads.
3Strength
If conventional mounting methods are used to secure heavy batteries, then stable mechanical connection is achieved, but assembly effort and complexity increase
Solution Approach 1:
The patent segments the mounting system into discrete, modular components: battery holder, spherical joints, and bearing points. This segmentation allows for simplified assembly where each component performs a specific function, reducing overall assembly complexity while maintaining strong mechanical connections through the standardized joint interfaces.
Data Source
Figure 1a~1c
Figure 2
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AI summary
The invention relates to a vehicle (10), preferably a utility vehicle, comprising a support frame (1) of two longitudinal members and multiple cross members (1b1, 1b2; 1a1, 1a2, 1a3) as well as a battery holder (2.1; 2.2; 2.3) for receiving at least one drive battery which is arranged between both longitudinal members (1b1, 1b2) of the support frame (1). According to the invention, the battery holder (2.1; 2.2; 2.3) is connected to the support frame (1) by means of a three-point mounting (3.1; 3.2; 3.3), the three-point mounting (3.1; 3.2; 3.3) comprising three bearing points (3a, 3b, 3c), each having a joint.