Vehicle Solar Power Control Device Voltage Stabilization
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Solution Overview
Problem
Existing vehicle-mounted solar power generation systems face challenges in efficiently charging batteries without a reference voltage when the solar battery is removed, as they struggle to stabilize power supply from fluctuating solar panels.
Innovation Solution
A power generation control device comprising DC-DC converters and a processor that creates a reference voltage between a solar panel and batteries, using a capacitor to stabilize voltage fluctuations, ensuring efficient charging of both the drive and auxiliary batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the solar battery is removed to cut costs, then the system cost is reduced, but the ability to stabilize reference voltage for efficient battery charging is worsened
Solution Approach 1:
The invention extracts the reference voltage stabilization function from the solar battery and implements it through a control device that manages power distribution between the first and second DC-DC converters. This allows the solar battery to be removed while maintaining voltage stability through active control of the power flow to the auxiliary battery and drive battery.
Solution Approach 2:
The control device acts as an intermediary between the solar panel and the batteries, managing power flow through the first and second DC-DC converters. It creates and maintains a stable reference voltage at the output of the first DC-DC converter by coordinating the operation of both converters, thereby compensating for the removal of the solar battery.
2Reliability
If step-up/down control is performed using solar battery voltage as reference, then stable power supply to batteries is achieved, but the system complexity increases
Solution Approach 1:
The control device performs multiple functions: it manages power distribution to both the auxiliary battery and drive battery, creates reference voltage, and stabilizes power supply. By integrating these functions into a single control device rather than requiring separate solar battery and control systems, the overall system complexity is reduced while maintaining stability.
Solution Approach 2:
The system uses the output voltage of the first DC-DC converter as its own reference voltage for control purposes. This self-referencing approach eliminates the need for an external solar battery to provide reference voltage, allowing the system to maintain stable power supply through self-regulation of the DC-DC converters.
3Productivity
If the voltage on the output side of the first DC-DC converter is controlled to a predetermined value, then efficient battery charging is achieved, but the control complexity increases
Solution Approach 1:
The control device implements feedback control by monitoring the output voltage of the first DC-DC converter and adjusting the power distribution through both converters to maintain the reference voltage at a predetermined value. This feedback mechanism ensures efficient battery charging while managing control complexity through automated voltage regulation.
Solution Approach 2:
The control device maintains the output voltage of the first DC-DC converter at a predetermined reference voltage level, creating an equipotential reference point that simplifies the charging control. By keeping this reference voltage stable, the system can efficiently charge both batteries without requiring complex variable voltage 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
The solution enables efficient powering of both drive and auxiliary batteries by maintaining a predetermined voltage, providing stable power even when the vehicle is in motion or stationary, and optimizing charging efficiency without the need for a solar battery.
Implementation Method 1
the capacitor is provided between the output side of the first DC-DC converter, which is the supplier of power to the drive battery and the auxiliary battery, and the ground. For that reason, according to this power generation control device, by providing the capacitor, fluctuations in the reference voltage caused by fluctuations in the power generated by the solar panel may be inhibited.
Data Source
AI summary
A power generation control device includes: a first DC-DC converter including an input side to which a solar panel mounted on a vehicle is connected; a second DC-DC converter including an input side to which an output side of the first DC-DC converter is connected and an output side to which a drive battery for driving the vehicle is connected; a third DC-DC converter including an input side to which the output side of the first DC-DC converter is connected and an output side to which an auxiliary battery for supplying power to accessories of the vehicle is connected; a memory; and a processor coupled to the memory, the processor being configured to control an output power of either the second DC-DC converter or the third DC-DC converter so that a voltage on the output side of the first DC-DC converter becomes a predetermined value.