Lower Box Body Mounting Stability via Protecting Assemblies
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Solution Overview
Problem
The structural strength reliability of the lower box body in battery boxes is compromised due to deformation or damage from vibrations and impacts during vehicle operation, as the mounting location bears the entire load and is prone to damage.
Innovation Solution
A lower box body design featuring a base body with protruding portions and multiple protecting assemblies forming a three-dimensional network structure, which disperses and transmits external forces to improve structural stability and prevent deformation or damage at the mounting location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lower box body is provided with a mounting hole for fixed mounting, then the battery box can be securely mounted to the vehicle, but the mounting location becomes prone to deformation or damage from vibrations and impacts during driving
Solution Approach 1:
The patent transitions from a planar mounting structure to a three-dimensional protective structure by adding protecting assemblies that extend in the up-down direction beyond the original lower box body surface. This dimensional extension creates additional load-bearing paths and distributes mounting forces across multiple levels, preventing concentration of stress at the mounting hole location.
Solution Approach 2:
The protective function is segmented into multiple independent protecting assemblies rather than using a single monolithic structure. Each protecting assembly independently supports and protects the mounting location, allowing the load to be distributed across multiple segments. This segmentation also enables modular design and easier manufacturing.
2Reliability
If the mounting location bears the entire load of the battery box, then fixed mounting is achieved, but the mounting location is most prone to be deformed or damaged after continuously subjected to vibration and impact
Solution Approach 1:
The protecting assemblies extend in the up-down direction to create a three-dimensional protective structure that distributes loads across multiple levels. This dimensional extension transforms the load-bearing mechanism from a single-plane structure to a multi-level structure, improving stability by providing additional support pathways that resist deformation from vibrations and impacts.
3Strength
If protecting assemblies are added to improve structural stability, then the mounting location resistance to external forces is enhanced, but the device complexity increases
Solution Approach 1:
The protecting assemblies are strategically positioned only at critical locations where the mounting hole and adjacent areas are most vulnerable to deformation. This localized protection approach enhances strength where needed without unnecessarily complicating the entire structure. The protecting assemblies have simple geometric forms that match the local structural requirements.
Solution Approach 2:
The protecting assemblies are integrated with the lower box body through fixed connection, merging the protective function with the existing structural framework. This integration allows the protecting assemblies to work together with the base body as a unified load-bearing system, reducing overall complexity compared to separate protective components.
Data Source
AI summary
The present disclosure provides a lower box body, a battery box and a vehicle, the lower box body comprises a base body, a first protecting assembly, a mounting hole. The base body comprises a bottom plate portion, a side plate portion, eave portions. The first protecting assembly is provided at outside of the base body, fixed to the base body and is attached to the eave portion. The mounting hole penetrates the eave portion and the first protecting assembly. The first protecting assembly improves the entirety structural strength of the lower box. Because the mounting hole is formed by penetrating the eave portion and the first protecting assembly, the structural stability of the mounting location of the lower box body is improved, thereby making the mounting location of the lower box body not be prone to be deformed or damaged when the battery box is subjected to the external force.