Multi-Bus Vehicle Power Supply for Battery Fault Isolation
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Solution Overview
Problem
Existing vehicle systems using large numbers of battery cells face maintenance challenges and inefficiencies due to disparate power requirements among different electrical systems, leading to performance issues when one battery assembly malfunctions.
Innovation Solution
A vehicle electric supply system with multiple energy storage devices and buses, each powering a different motor, controlled by a centralized controller to vary current distribution independently, isolating performance issues and optimizing power delivery based on system requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If large format batteries are used to supply power to the vehicle system, then the propulsion power requirement is met, but the system becomes difficult to maintain and cumbersome to operate
Solution Approach 1:
The battery system is divided into multiple modular battery assemblies, each capable of independent operation. This segmentation allows individual assemblies to be maintained or replaced without affecting the entire system, reducing maintenance complexity while maintaining sufficient propulsion power through coordinated operation of multiple assemblies.
2Power
If a single large battery assembly is used, then propulsion power is sufficient, but performance issues with one assembly cause performance issues with the entire vehicle system
Solution Approach 1:
The system uses multiple independent battery assemblies instead of one large assembly. Each assembly operates independently and can be isolated in case of performance issues, preventing single-point failures from affecting the entire vehicle system and thereby improving reliability while maintaining propulsion power.
Solution Approach 2:
Each battery assembly can be individually monitored and controlled based on its specific performance characteristics. This allows the system to optimize power distribution from each assembly according to its local condition, ensuring reliable operation even when individual assemblies exhibit varying performance.
3Power
If large format batteries are used, then propulsion power is adequate, but the batteries inefficiently supply disparate power needs of different electrical systems
Solution Approach 1:
Multiple battery assemblies are distributed across the vehicle system, with each assembly positioned near and dedicated to specific electrical systems or motors. This segmentation reduces power transmission losses and allows each assembly to efficiently supply power to its local loads, improving overall energy efficiency while maintaining adequate propulsion power.
Solution Approach 2:
The system matches battery assemblies to specific power requirements of different electrical systems, allowing each assembly to operate in its optimal efficiency range for its designated loads. This local optimization ensures efficient power supply across disparate electrical systems while maintaining sufficient propulsion power.
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 system enhances efficiency and reliability by isolating performance issues, allowing flexible maintenance and operation, and optimizing power distribution to meet varying load demands, reducing the risk of system-wide failures.
Implementation Method 1
a vehicle electric supply system includes a plurality of power supply assemblies. Each of the power supply assemblies includes a battery assembly including rechargeable energy storage devices
Implementation Method 2
an inverter coupled to the battery assembly, a motor coupled to the inverter, and a bus conductively coupled with the battery assembly and inverter
Data Source
AI summary
An electric supply system for a vehicle that includes two or more energy storage devices configured to store electric energy is provided. Two or more buses are also provided, and each bus conductively couples an energy storage device of the two or more energy storage devices with a different motor of a plurality of motors of the vehicle. A controller is configured to control conduction of electric current from each of the battery assemblies to each of the motors of the vehicle, the controller is also configured to direct each of the battery assemblies to concurrently vary an input to each of the corresponding motors of the vehicle.