Dynamic Power Ratio Control for Vehicle Electrical Sources
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Solution Overview
Problem
Existing electrical source control methods for vehicles with dual electrical sources, such as batteries and capacitors, are not effective in dynamically adjusting power ratios to meet varying vehicle characteristics, leading to potential deterioration of battery performance and compromised driving efficiency and fuel efficiency.
Innovation Solution
An electrical source control apparatus that selects and adjusts the ratio of electrical power between a high-capacity battery and a high-output capacitor based on required vehicle characteristics, using a selecting device to choose from multiple driving modes and a controlling device to manage power input/output according to these ratios, ensuring optimal use of both sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control method prevents rapid discharge/charge to the battery, then battery deterioration is suppressed, but driving performance and fuel efficiency deteriorate
Solution Approach 1:
The patent applies dynamics by making the power ratio between battery and capacitor adjustable based on driving conditions. The control device dynamically changes the power ratio according to the required output power and driving state, allowing the system to adapt between protecting battery durability and maintaining driving performance. This resolves the contradiction by enabling the system to switch between conservative battery protection mode and performance-optimized mode.
Solution Approach 2:
The patent changes the parameter of power ratio distribution between battery and capacitor based on operating conditions. By adjusting the proportion of power supplied by each source according to required output levels and driving states, the system optimizes both battery protection and driving performance. This parameter adjustment allows flexible balancing between the two conflicting objectives.
2Reliability
If the control method prioritizes battery protection, then battery deterioration is suppressed, but fuel efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts the power ratio between battery and capacitor based on real-time driving conditions and required output power. During high-power demands or rapid acceleration, the system can increase capacitor contribution to protect the battery while maintaining fuel efficiency. During normal operation, it can optimize the ratio for best fuel economy while still protecting battery health.
Solution Approach 2:
The control device changes the power distribution parameter between battery and capacitor according to operating conditions. By optimizing this parameter across different driving scenarios, the system achieves both battery protection and fuel efficiency improvement, rather than sacrificing one for the other.
3Device complexity
If the control method uses fixed power ratios, then system complexity is reduced, but adaptability to different driving characteristics deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of power ratios based on required output power and driving state. The control device automatically adapts the battery-capacitor power distribution to match different driving conditions and vehicle characteristics, providing high adaptability through a relatively simple control logic that responds to real-time operating parameters.
Data Source
AI summary
An electrical source control apparatus controls a vehicle traveling by using a source system including a first source performing input/output of first power and a second source performing input/output of second power, capacity of the second source is smaller than that of the first source and output of the second source is larger than that of the first source. The apparatus has a controller programmed to select a first driving mode which prioritizes a fuel efficiency over a driving performance and a second driving mode which prioritizes the driving performance over the fuel efficiency based on a characteristic required for the vehicle from driving modes having different ratios of the first power with respect to a required power required for the source system, and control the first and second sources such that the input/output of the first power is performed in accordance with the ratio of the selected driving mode.