Firefighting Vehicle Battery Rack Layout for Hybrid EV Integration
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Solution Overview
Problem
Firefighting vehicles with internal combustion engines pose environmental and operational challenges, such as high emissions and complex maintenance, and the transition to electric vehicles requires significant changes in design and operation, which can be costly and require retraining for operators.
Innovation Solution
The development of an electrified firefighting vehicle with a distributed energy storage system, including a rack-mounted battery pack configuration and a power distribution system, allowing for seamless integration with existing vehicle designs and operations, enabling both electric and hybrid modes of operation while maintaining the look and feel of traditional vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If an internal combustion engine is used to power the firefighting vehicle, then the vehicle can operate with existing infrastructure and maintain traditional operational characteristics, but the vehicle produces high emissions and requires complex maintenance
Solution Approach 1:
The energy storage system is divided into multiple battery packs (first battery pack, second battery pack, etc.) that are distributed throughout the vehicle chassis. This segmentation allows the electric powertrain to be integrated without requiring a complete redesign of the vehicle architecture, thereby reducing emissions while managing the complexity of the transition to electric propulsion.
Solution Approach 2:
The vehicle is designed to operate in both electric mode and hybrid mode with an internal combustion engine. This multi-functionality allows the vehicle to reduce emissions during normal operation while retaining the capability to use the internal combustion engine when additional range or power is needed, effectively managing both emissions and maintenance complexity.
2Object-generated harmful factors
If the vehicle is converted to electric operation, then emissions are reduced and maintenance is simplified, but significant design changes are required that increase cost and require operator retraining
Solution Approach 1:
The battery system is segmented into multiple discrete battery packs distributed throughout the chassis rather than requiring a single large battery installation. This approach reduces design changes by integrating electric components into existing vehicle spaces while achieving the emissions reduction goals of full electrification.
Solution Approach 2:
The vehicle operates dynamically switching between electric power from battery packs and hybrid power from the internal combustion engine. This dynamic operation allows the vehicle to achieve reduced emissions during electric operation while minimizing design changes by retaining the original engine infrastructure for when it is needed.
3Device complexity
If a centralized energy storage system is used, then the design is simpler, but the vehicle requires significant redesign and operator retraining
Solution Approach 1:
The energy storage system is divided into multiple battery packs positioned at different locations within the vehicle chassis rather than using a single centralized battery installation. This segmentation allows integration with existing vehicle designs while maintaining operational simplicity for operators through familiar vehicle layouts and controls.
4Adaptability or versatility
If multiple battery packs are distributed throughout the vehicle, then the vehicle can operate in both electric and hybrid modes with minimal design changes, but the power distribution system becomes more complex
Solution Approach 1:
A power distribution system acts as an intermediary between the multiple distributed battery packs and the vehicle's powertrain systems. This intermediary manages the complexity of coordinating multiple battery packs while enabling the vehicle to operate in both electric and hybrid modes with minimal changes to the overall vehicle architecture.
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
This solution allows for reduced emissions, simplified maintenance, and minimal operator training, as the electrified vehicle operates similarly to its internal combustion engine counterpart, enhancing fleet integration and uptime while reducing environmental impact.
Implementation Method 1
The energy storage system includes a rack, a first battery pack, a second battery pack, and a power distribution system
Data Source
AI summary
An electrified fire fighting vehicle includes a chassis, a cab coupled to the chassis, a body coupled to the chassis, an electric motor coupled to the chassis, and an energy storage system positioned between the cab and the body. The energy storage system includes a rack, a first battery pack, a second battery pack, and a power distribution system. The rack is coupled to and extends upward from the chassis. The rack defines an interior chamber having a first portion, a second portion, and a center portion. The first battery pack is positioned within the first portion. The second battery pack is positioned within the second portion. The power distribution system is positioned within the center portion between the first battery pack and the second battery pack. The power distribution system is electrically coupled to the first battery pack, the second battery pack, and the electric motor.