Hybrid Vehicle Power Network Voltage Control Logic
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Solution Overview
Problem
Conventional electrical energy delivery systems in vehicles face interference and stability issues due to conflicts in controlling the power network voltage, particularly when multiple electrical devices attempt to control the voltage simultaneously, leading to potential interruptions in critical vehicle functions.
Innovation Solution
A power control system that includes a control logic module to identify power demands and select the most suitable device for controlling the power network voltage or current, based on the electrical characteristics of the power generating unit, energy storage units, and electrical load, using historical, current, and predicted operational modes of the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple electrical devices attempt to control the voltage simultaneously, then the system can respond to diverse power demands, but conflicts and stability issues arise in controlling the power network voltage
Solution Approach 1:
The patent introduces a control logic module as an intermediary that receives power demand signals and determines which electrical device should control the power network voltage. This mediator coordinates between multiple electrical devices (power generating unit, energy storage units, and electrical load) and prevents direct conflicts by establishing a hierarchical control structure where only one device controls voltage at any given time based on current power demands and device characteristics
2Reliability
If a single device controls the power network voltage, then stability is maintained, but the system cannot adapt to varying power demands from different operational modes
Solution Approach 1:
The control logic module dynamically determines which electrical device should control the power network voltage based on real-time power demands, historical operational modes, current characteristics, and predicted future modes. This dynamic assignment allows the system to maintain stability through single-device control while adapting to varying demands by switching control authority between different devices as operational conditions change
Solution Approach 2:
The control logic module uses feedback from historical, current, and predicted operational modes to make informed decisions about voltage control assignment. By continuously monitoring system state and using this feedback to determine the most suitable controlling device, the system adapts to varying power demands while maintaining stable voltage control through coordinated single-device operation
3Adaptability or versatility
If multiple devices control voltage simultaneously, then diverse operational modes are supported, but interruptions in critical vehicle functions may occur
Solution Approach 1:
The control logic module acts as an intermediary that prevents direct simultaneous control attempts by multiple devices. It receives power demand signals, determines the appropriate controlling device based on operational modes and device characteristics, and assigns voltage control authority to a single device at any time, thereby supporting diverse operational modes while preventing interruptions to critical vehicle functions
Data Source
AI summary
A power control system for controlling a power network of a hybrid electrical vehicle, is provided. The power control system includes a power generating unit, one or more energy storage units coupled to a power converting unit, an electrical load. The power control system further includes a control logic module for controlling the power generating unit and the power converting unit. The control logic module is configured to identify a power demand from the electrical load and to select the power generating unit or one of the one or more energy storage units to control a voltage level of the power network based on the identified power demand, based on electrical characteristics of the power generating unit, of the power converting unit, and of the electrical load, and based on a current mode of operation of the vehicle.