Electric Vehicle Power Control System for Stable Device Operation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power control systems for electric vehicles face instability when suddenly increasing electric power consumption, leading to inadequate power distribution among devices, which can cause devices to stop operating or result in unpleasant air temperatures due to rapid refrigerant pulsation and pressure fluctuations.
Innovation Solution
A power control system comprising a high voltage battery, device controllers for individual power consumption devices, and an overall controller that allocates electric power effectively by restricting consumption in a controlled manner to maintain stability and prioritize essential devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the high voltage battery restricts electric power consumption suddenly to meet sudden acceleration demands, then the electric power can be allocated to priority devices, but the operation of power consumption devices becomes unstable and may stop
Solution Approach 1:
The control system dynamically adjusts the electric power allocation to power consumption devices based on the vehicle's operational state. When sudden acceleration is detected, the system gradually reduces power to non-priority devices rather than abruptly cutting it, maintaining operational stability while reallocating power to priority devices like the dynamo-electric machine.
Solution Approach 2:
The control system implements periodic monitoring and adjustment of power consumption, using control periods to gradually modify power allocation. This periodic control approach prevents sudden disruptions by making incremental adjustments over time, ensuring stable operation during power reallocation.
2Power
If the electric power consumption is rapidly restricted in the electrically-driven compressor, then the electric power can be reallocated, but the refrigerant pulsates significantly and the air-conditioning system becomes unstable
Solution Approach 1:
The control system dynamically adjusts the compressor's electric power consumption based on refrigerant flow requirements. When power reallocation is needed, the system gradually reduces compressor power rather than abruptly stopping it, preventing significant refrigerant pulsation and pressure fluctuations that would destabilize the air-conditioning system.
Solution Approach 2:
The control system prepares for power reallocation by gradually reducing compressor power in advance of the actual power deficit. This cushioning approach prevents sudden refrigerant pressure changes by smoothly transitioning the compressor operation, maintaining air-conditioning system stability during power reallocation events.
3Power
If the electric power consumption is suddenly restricted, then the power can be prioritized to essential devices, but the air temperature in the vehicle compartment becomes unpleasant and the system requires restart
Solution Approach 1:
The control system dynamically balances power allocation between mobility devices and air-conditioning devices based on real-time vehicle conditions. When power prioritization is needed for sudden acceleration, the system gradually reduces air-conditioning power while monitoring temperature conditions, ensuring the vehicle compartment remains comfortable and avoiding system shutdowns.
Solution Approach 2:
The control system uses feedback from temperature sensors and power consumption monitoring to continuously adjust power allocation. This feedback mechanism ensures that when power is prioritized to essential devices, the air-conditioning system maintains sufficient operation to keep the vehicle compartment at comfortable temperatures, preventing unpleasant thermal conditions and system restarts.
Data Source
AI summary
A power control system supplies electric power to a plurality of power consumption devices which are provided to an electric vehicle. This system includes: a high voltage battery which is an electric power supply source; a plurality of device controllers which are provided to the respective power consumption devices and which control operations of the respective power consumption devices; and an overall controller which overall controls the plurality of device controllers. At least one of the device controllers performs an electric power restriction that restricts a consumed electric power in a corresponding power consumption device so as to allow the consumed electric power in the corresponding power consumption device to fall within an electric power allocated by the overall controller while simultaneously maintaining an operation of the corresponding power consumption device stably.