Hydrogen EV Power Control for SOC and Regenerative Braking
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Solution Overview
Problem
Commercial hydrogen electric vehicles face challenges in maintaining optimal battery state of charge (SOC) during smart power control, particularly when transitioning from uphill to downhill routes, leading to potential safety issues due to inadequate regenerative braking and heat generation.
Innovation Solution
A smart power control apparatus and method that assesses driving route reliability using navigation and slope information to limit battery SOC fluctuation ranges and adjust charge/discharge rates, ensuring safe power control by determining reliability levels and calculating SOC consumption for each road segment to enter appropriate power control modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the battery SOC is charged to maximum to ensure uphill performance, then the uphill climbing capability is improved, but the vehicle becomes unsafe when entering a downhill route because regenerative braking cannot be used
Solution Approach 1:
The patent applies dynamics by making the battery charge/discharge control adaptive and variable based on real-time driving conditions. The controller dynamically adjusts the battery SOC management strategy according to the detected road slope and vehicle operating state, transitioning from a static maximum charge approach to a dynamic control approach that ensures both uphill performance and downhill safety
Solution Approach 2:
The patent implements feedback control by continuously monitoring the battery SOC, driving conditions, and road slope information. The controller uses this feedback to adjust the battery charge/discharge rate in real-time, creating a closed-loop control system that prevents the dangerous situation of having maximum SOC when downhill braking is needed
2Reliability
If the battery SOC is set to minimum to enable regenerative braking on downhill, then the downhill braking safety is improved, but the uphill performance deteriorates due to insufficient power
Solution Approach 1:
The controller dynamically adjusts the target battery SOC based on the detected driving conditions. When uphill conditions are detected, the target SOC is increased to ensure sufficient power for climbing. When downhill conditions are detected, the target SOC is decreased to enable regenerative braking, thus adaptively resolving the contradiction between uphill performance and downhill safety
3Productivity
If smart power control charges or discharges battery over very long distance (10 km), then the power control effectiveness is improved, but the system becomes ineffective when the vehicle enters a different driving route than predicted
Solution Approach 1:
The patent makes the smart power control system dynamic by continuously monitoring actual driving conditions and comparing them with predicted conditions. When route changes or unexpected conditions are detected, the controller adapts the battery charge/discharge strategy in real-time, transitioning from a long-distance fixed plan to a dynamic adaptive control approach
Solution Approach 2:
The system uses feedback from actual driving conditions (road slope, vehicle speed, power demand) to adjust the battery control strategy. When the vehicle enters a different route than predicted, the feedback mechanism detects the deviation and modifies the charge/discharge rate accordingly, maintaining effectiveness despite route changes
4Ease of operation
If main braking is used without regenerative braking on downhill, then the braking simplicity is maintained, but dangerous heat generation occurs
Solution Approach 1:
The patent converts the previously harmful situation of excessive heat generation into a beneficial outcome by implementing regenerative braking control. By managing battery SOC to enable regenerative braking on downhill, the system transforms the potential harm of heat generation into useful energy recovery, while maintaining simple braking operation through automated control
Data Source
AI summary
A smart power control apparatus for a commercial hydrogen electric vehicle and a method thereof are provided. The smart power control apparatus includes a navigation device that transmits navigation information; a map providing device that transmits map data including slope information; and a controller connected with the navigation device and the map providing device. The controller determines driving route reliability for a driving route in front of a vehicle based on the navigation information and the slope information and applies at least one of a limit to a battery state of charge (SOC) fluctuation range, an adjustment to a battery charge/discharge rate, or a combination thereof based on the driving route reliability to perform a smart power control.