RV Service Battery Charging Management via Dynamic Source Switching
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Solution Overview
Problem
Recreational vehicles face power supply insufficiencies when relying solely on solar energy, particularly on rainy days, as the service battery may not receive adequate charging, impacting household electricity consumption.
Innovation Solution
A service battery charging management device and method that utilizes a MCU main control unit to selectively choose between a vehicle generator and solar cell panel for charging, employing MPPT and switching power supply modes, along with temperature and voltage compensation, to ensure the service battery remains in an optimal charging state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the service battery is charged only by the solar cell panel, then energy consumption is reduced, but power supply insufficiency occurs on rainy days
Solution Approach 1:
The patent implements dynamic switching between solar cell panel and vehicle generator based on real-time detection of solar irradiance intensity and battery charge state. The system transitions from static single-source charging to dynamic multi-source charging, adjusting the charging source according to environmental conditions and system state, thereby resolving the contradiction between energy efficiency and power supply reliability.
Solution Approach 2:
The system changes the operating parameters by detecting solar irradiance intensity and battery voltage/charge state, then adjusting the charging source selection accordingly. When solar irradiance is sufficient and battery is not fully charged, solar charging is used; when irradiance is insufficient or battery is full, vehicle generator charging is activated, thus adapting to different conditions to maintain both energy efficiency and reliability.
2Reliability
If the vehicle generator charges the service battery, then power supply reliability is improved, but energy consumption increases
Solution Approach 1:
The system employs feedback control by continuously detecting solar irradiance intensity, battery charge state, and charging current. Based on this feedback, the control unit intelligently decides whether to use solar cell panel or vehicle generator for charging, optimizing the balance between power supply reliability and energy consumption. The feedback mechanism ensures the system only switches to vehicle generator when necessary.
Solution Approach 2:
The system achieves self-service by autonomously monitoring its own charging state and environmental conditions, then automatically selecting the appropriate charging source without external intervention. The control unit independently manages the charging process, switching between solar and generator sources based on real-time system state, thereby resolving the energy-reliability contradiction through self-regulation.
3Device complexity
If a simple switch connection is used between starting battery and service battery, then device complexity is reduced, but charging management precision is insufficient
Solution Approach 1:
The patent introduces an input automatic switching unit as an intermediary component between the charging sources and the service battery. This switching unit, controlled by the MCU main control unit, precisely manages the connection and disconnection between solar cell panel/vehicle generator and the service battery based on detected conditions, thereby achieving precise charging management while maintaining relatively simple system structure.
Solution Approach 2:
The MCU main control unit serves multiple functions: it detects solar irradiance intensity, monitors battery charge state, controls the input automatic switching unit, and manages the charging process. This multi-functional control unit achieves precise charging management without requiring separate dedicated components for each function, thus balancing precision with system simplicity.
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
Guarantees a normal power supply for household electricity consumption by intelligently managing charging sources, ensuring the service battery is always adequately charged and making efficient use of clean solar energy.
Implementation Method 1
the solar cell panel is generally used as a power supply power supply of the household electricity consumption of the recreational vehicle and directly supplies power to the service battery
Implementation Method 2
a vehicle generator and a starting battery, which are used for supplying power to a starter motor
Implementation Method 3
the charging main converting DC/DC circuit, a charging current detection unit
Data Source
AI summary
The present application relates to a service battery charging management device and method for power supply of a recreational vehicle, wherein, the service battery charging management device for power supply of recreational vehicle includes: a vehicle generator, a solar cell panel, a MCU main control unit, an input automatic switching unit, a charging main converting DC/DC circuit, a service battery, a PWM mode charging unit, and a load. The MCU main control unit controls the input automatic switching unit according to an output voltage of the solar cell panel and an output voltage of the vehicle generator, which enables the solar cell panel and the vehicle generator to selectively serve as a charging power supply of the service battery to enable the service battery to be kept in an alternative-charging state, so that normal power supply of household electricity consumption of the recreational vehicle can be guaranteed.