Multi-Battery Power Supply Control for Charge Balancing
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Solution Overview
Problem
Existing power supply devices for airplanes with multiple batteries face complexity and increased costs due to the need for precise control of charge levels and power distribution, which complicates the control system and requires power transfer between batteries.
Innovation Solution
A power supply device that calculates current values and demanded power based on battery charge levels and capacities, using a power summation part to generate power for both batteries and electrical loads, with diodes preventing power transfer between batteries, allowing for simpler and more cost-effective charge balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power distribution to each battery is determined based on charge level with precise control, then battery charge levels can be balanced, but the control system becomes complicated and expensive
Solution Approach 1:
The patent applies self-service by allowing batteries to automatically balance their charge levels through inherent electrical potential differences. When multiple batteries are connected in parallel through diodes, the battery with higher voltage automatically discharges to charge the battery with lower voltage, achieving charge balancing without complex external control systems. This natural equalization process eliminates the need for sophisticated control algorithms and expensive control devices.
Solution Approach 2:
The patent uses diodes as intermediary components to enable controlled power flow between batteries. The diodes act as one-way valves that allow current to flow from batteries with higher charge levels to batteries with lower charge levels, while preventing reverse current flow. This simple passive component facilitates automatic charge balancing without requiring active control mechanisms, thereby reducing system complexity.
2Reliability
If a device for transferring power between batteries is added, then charge levels can be balanced, but the control device becomes more complicated and costly
Solution Approach 1:
The patent employs diodes as intermediary components to enable controlled power flow between batteries. The diodes act as one-way valves that allow current to flow from batteries with higher charge levels to batteries with lower charge levels, while preventing reverse current flow. This simple passive component facilitates automatic charge balancing without requiring active control mechanisms, thereby reducing system complexity.
Solution Approach 2:
The patent extracts the active control function from the power transfer mechanism by using passive diodes instead of active power electronics. This extraction of control complexity allows the system to achieve charge balancing through passive electrical characteristics rather than active control, significantly simplifying the control device.
3Reliability
If precise control is implemented to keep charge levels within predetermined range, then battery performance improves, but the control system becomes more complicated and expensive
Solution Approach 1:
The patent applies self-service by allowing batteries to automatically balance their charge levels through inherent electrical potential differences. When multiple batteries are connected in parallel through diodes, the battery with higher voltage automatically discharges to charge the battery with lower voltage, achieving charge balancing without complex external control systems. This natural equalization process eliminates the need for sophisticated control algorithms and expensive control devices.
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 stable and balanced charge levels in batteries without the need for complex control systems, reducing costs and preventing overcharging/overdischarging, while maintaining optimal battery usage and efficiency.
Implementation Method 1
with diodes preventing power transfer between batteries
Data Source
AI summary
A power supply device includes a power generator, a drive source, a plurality of power supply lines, a plurality of batteries, a current value calculation part 11, a demanded battery power calculation part 12, and a power summation part 13. The current value calculation part 11 calculates the C-rates CR1, CR2, CR3 and CR4 of the batteries based on the charge levels of the batteries. The demanded battery power calculation part 12 calculates a demanded power P or Q of the batteries based on the calculated C-rates CR1, CR2, CR3 and CR4 and the capacities of the batteries. The power summation part 13 sums the demanded power P or Q of the batteries and power demanded by electrical loads. The control unit 9 controls the drive source such that the power generator generates power calculated by the power summation part 13.