Battery Charge Difference Control for Multi-Battery Power Distribution
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Solution Overview
Problem
Existing power supply devices for aircraft and similar flying objects face complexity and increased costs due to the need for precise control of battery charge states and power distribution, leading to complications in control systems and potential inefficiencies.
Innovation Solution
A power supply device with a power generator, drive source, diodes, and control units that calculate and sum differences between target and measured electric power for each battery, allowing for accurate control of electric power distribution and generation, thereby simplifying the control system and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distribution proportions of electric power to the batteries are determined based on the respective charge states of the batteries, then battery performance is improved, but the control system configuration becomes complicated
Solution Approach 1:
The control system is segmented into independent functional units: a difference calculating unit that computes charge state differences for each battery independently, a difference summing unit that aggregates these differences, and an electric power summing unit that calculates total power requirements. This modular segmentation simplifies the overall control configuration while maintaining the ability to perform sophisticated battery management based on charge state differences.
2Measurement precision
If precise control is needed for convergence of the respective charge states of the batteries on a predetermined value, then battery equalization is achieved, but the control device becomes more complicated
Solution Approach 1:
The system implements feedback control by continuously calculating the difference between actual charge states and target charge states for each battery, summing these differences, and using the result to dynamically adjust power distribution. This feedback mechanism ensures precise convergence of battery charge states to predetermined values while maintaining a relatively simple control device structure through automated iterative adjustment.
3Reliability
If electric power required for each battery is calculated and priority order is determined, then battery charge equalization is improved, but the control device cost increases
Solution Approach 1:
The control system performs self-service by automatically calculating charge state differences, determining priority orders, and adjusting power distribution without requiring complex external control devices. The difference calculating unit, difference summing unit, and electric power summing unit work autonomously to equalize battery charges, reducing the need for expensive additional control hardware while maintaining effective battery management.
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 solution enables more accurate control of battery charging and discharging, reduces unintentional charging and discharging, and improves fuel efficiency by ensuring precise power management, thus extending battery life and simplifying the control of flying objects with varying power consumption.
Implementation Method 1
a diode that is provided upstream from the battery in the corresponding power supply line and allows electric power to flow in only one direction from upstream to downstream of the power supply line
Data Source
AI summary
The power supply device includes a power generator, a drive source, a plurality of batteries, a difference calculating unit 11, a difference summing unit 12 and an electric power summing unit 13. The difference calculating unit 11 is configured to calculate differences between target amounts of electric power Q1, Q2, Q3, and Q4 of each battery and measured amounts of electric power M1, M2, M3, and M4. The difference summing unit 12 is configured to sum the differences in electric power of the batteries calculated by the difference calculating unit 11. The electric power summing unit 13 is configured to sum electric power calculated by the difference summing unit 12 and electric power required for the electric motors. A control unit 9 controls the drive source such that electric power calculated by the electric power summing unit 13 is generated by the power generator.