Commercial EV Management via Multi-Bus CAN Architecture
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Solution Overview
Problem
Current systems lack a comprehensive, integrated solution for monitoring and managing the operation and performance of heavy-duty commercial electric vehicles to enhance fleet efficiency, reduce operating costs, and improve driver safety.
Innovation Solution
A management system for commercial electric vehicles utilizing a network of CAN buses connected to various components, including a motor controller system, battery system, and telematics system, with a vehicle controller that monitors and controls these components to optimize performance, efficiency, and safety features such as regenerative braking, cooling management, and driver efficiency reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a comprehensive integrated management system is implemented to monitor and control all vehicle components, then fleet efficiency and driver safety are improved, but device complexity increases
Solution Approach 1:
The management system is divided into multiple independent control units, each responsible for specific vehicle functions (motor controller, battery management system, telematics controller). Each controller manages particular components through dedicated CAN buses, allowing distributed control that improves safety while maintaining manageable system complexity through functional segmentation.
Solution Approach 2:
The vehicle controller is designed as a multi-functional integrated unit that performs diverse functions including monitoring battery state, controlling motor output, managing cooling systems, and communicating with telematics systems. This universal controller consolidates multiple control functions into a single system, improving reliability through comprehensive monitoring while avoiding the complexity of multiple separate control systems.
2Measurement precision
If multiple CAN buses are used to connect various vehicle components, then measurement precision and control capability are improved, but device complexity increases
Solution Approach 1:
The communication network is segmented into multiple dedicated CAN buses, each serving specific vehicle subsystems (drive CAN for motor control, battery CAN for power management, telematics CAN for data communication). This segmentation allows precise monitoring of individual components through dedicated communication channels while organizing network complexity into manageable functional groups.
3Productivity
If real-time monitoring and control of all components is implemented, then productivity and fleet efficiency are improved, but use of energy increases
Solution Approach 1:
The battery management system continuously monitors battery state and automatically adjusts power distribution to optimize energy efficiency. The system self-regulates power delivery to various components based on real-time conditions, maximizing fleet productivity while minimizing unnecessary energy consumption through automated efficiency optimization.
Solution Approach 2:
The vehicle controller dynamically adjusts operating parameters of various components based on real-time monitoring data. Motor controller parameters, battery discharge rates, and auxiliary component operation are continuously optimized to maintain high productivity while reducing energy consumption through adaptive parameter adjustment.
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 system effectively increases fleet efficiency, reduces operating costs, and improves driver safety by providing real-time monitoring and control of vehicle operations, optimizing energy use, and enhancing driver performance through integrated data analysis and proactive maintenance.
Implementation Method 1
measure operating temperature of the motor controller and adjust speed of a cooling pump and a radiator fan to maintain a predetermined operating temperature
Implementation Method 2
a drive CAN bus connected to a motor controller system comprising a motor controller connected to an electric motor
Implementation Method 3
a battery CAN bus connected to a battery system comprising: a high-voltage (HV) battery
Implementation Method 4
control regenerative braking by determining if the EV is coasting and adjusting a regeneration current supplied by the electric motor to a high-voltage (HV) battery
Data Source
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AI summary
A management system for a commercial electric vehicle (EV), comprising: a controller area network (CAN) comprising a plurality of CAN buses connected to a plurality of components of the EV; and a vehicle controller connected to the CAN and configured to monitor and/or control the plurality of components of the EV based on CAN signals; wherein the plurality of CAN buses and their respective components comprise: a drive CAN bus connected to a motor controller system; a battery CAN bus connected to a battery system; and a telematics CAN bus connected to a telematics system.