Refuse Vehicle Battery Pod Layout for Stress Relief and Service Access
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Solution Overview
Problem
Refuse vehicles face challenges in efficiently managing mechanical, thermal, and physical stresses on battery systems, which can lead to reduced performance and lifespan, and existing solutions do not provide easy maintenance or upgrade options for battery components.
Innovation Solution
A battery pod assembly for refuse vehicles is designed with stress mitigation devices, modular components for easy maintenance and upgrade, and various positioning options to reduce mechanical and thermal stresses, including the use of dampers and thermal management systems to optimize battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If battery cells are integrated into the chassis frame structure, then mechanical strength and stress distribution are improved, but maintenance accessibility and component replacement difficulty worsen
Solution Approach 1:
The battery system is divided into modular battery cell assemblies that can be independently removed and replaced. Each battery cell assembly is designed as a separate module that interfaces with the chassis frame, allowing maintenance personnel to access and replace individual battery modules without disassembling the entire chassis structure, thus maintaining structural strength while improving maintenance accessibility.
Solution Approach 2:
The battery cells are extracted as removable components from the chassis frame structure. The chassis frame is designed with integrated mounting features that allow battery cell assemblies to be easily detached and reattached, separating the battery maintenance function from the permanent chassis structure while maintaining mechanical integrity during operation.
2Stability of the object's composition
If battery cells are positioned within the chassis frame members, then vehicle stability and center of gravity are improved, but thermal management difficulty and accessibility worsen
Solution Approach 1:
The chassis frame members are designed with localized thermal management features at specific battery cell positions, including integrated cooling channels and thermal contact surfaces. This allows effective thermal management at the battery locations while maintaining overall vehicle stability, as the thermal management system is tailored to the specific heat generation patterns at each battery module position.
Solution Approach 2:
Thermal management plates or interfaces are introduced as intermediary components between the battery cells and the chassis frame. These intermediaries facilitate heat transfer from the battery cells to the chassis cooling system while maintaining the structural positioning that ensures vehicle stability, thus resolving the conflict between stable positioning and thermal accessibility.
3Productivity
If battery cells are longitudinally disposed along the chassis, then space utilization and weight distribution are improved, but mechanical stress concentration and vulnerability worsen
Solution Approach 1:
The battery cell assemblies are designed with integrated shock-absorbing mounts and cushioning elements that are pre-installed at each battery position along the chassis. These cushioning features are positioned beforehand to absorb and distribute mechanical stresses from road vibrations and impacts, protecting the battery cells from stress concentration while maintaining the longitudinal arrangement for optimal space utilization.
Solution Approach 2:
The battery mounting structure utilizes composite materials that combine structural support functions with stress-distribution properties. The chassis frame members incorporate materials or structural features that distribute mechanical loads across multiple battery cells rather than concentrating stress at single points, allowing longitudinal placement for space efficiency while reducing vulnerability to mechanical damage.
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 battery pod assembly effectively mitigates mechanical and thermal stresses, enhances maintenance accessibility, and allows for upgrades, thereby improving the operational efficiency and lifespan of the refuse vehicle's battery systems.
Implementation Method 1
stress mitigation devices... dampers
Implementation Method 2
thermal management systems to optimize battery performance
Data Source
AI summary
A refuse vehicle includes a chassis, a body, and a plurality of battery cells. The chassis includes a right frame member and a left frame member spaced apart in a lateral direction and extending lengthwise in a longitudinal direction. The body is coupled to the chassis. The plurality of battery cells are longitudinally disposed along the chassis, positioned between the right frame member and the left frame member.