Hybrid Mower Power System with Battery and Generator Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hybrid mower systems lack efficiency and control, and are not suitably designed for typical mower needs, struggling to balance the efficiency of battery-powered mowers with the operational availability and peak power capabilities of engine-powered mowers.
Innovation Solution
A hybrid riding lawn mower with a power system that includes a primary battery, a generator, and an auxiliary battery, where the generator can power the motors independently or in tandem with the primary battery, and the auxiliary battery provides backup power when the primary and generator are low on charge or fuel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a battery powered system is used to improve efficiency, then energy efficiency is improved, but operating duration and peak power capability deteriorate
Solution Approach 1:
The patent combines a battery system and a generator system into a hybrid power system. The battery provides efficient power for normal operation while the generator extends operating duration and provides peak power when needed. The control system manages power distribution between these two sources to optimize both efficiency and duration.
Solution Approach 2:
The hybrid system serves multiple functions: the battery provides efficient power for standard mowing operations, the generator provides extended range and peak power capability, and the combination allows the system to adapt to different operational requirements. This multi-functionality resolves the contradiction by providing both efficiency and duration depending on conditions.
2Power
If a hybrid engine and battery system is used to provide efficiency and peak power, then energy efficiency and peak power capability are improved, but system complexity and ease of operation deteriorate
Solution Approach 1:
The control system automatically manages the hybrid power system without requiring manual intervention from the operator. It monitors battery charge levels, generator fuel levels, and power demands, then automatically switches between battery-only mode, generator-only mode, and combined mode. This self-service capability maintains peak power capability while reducing operational complexity.
Solution Approach 2:
The control system continuously monitors system state (battery charge, generator status, power demand) and adjusts power distribution accordingly. This feedback mechanism allows the system to automatically optimize performance and simplify operation by making real-time decisions about which power source to use based on current conditions.
3Duration of action of moving object
If a hybrid system is used to provide efficiency and range, then energy efficiency and operating range are improved, but control and ease of operation deteriorate
Solution Approach 1:
The control system automatically manages the hybrid power system without requiring manual intervention from the operator. It monitors battery charge levels, generator fuel levels, and power demands, then automatically switches between battery-only mode, generator-only mode, and combined mode. This self-service capability maintains peak power capability while reducing operational complexity.
Solution Approach 2:
The system dynamically adjusts its operational mode based on real-time conditions. The control system continuously evaluates battery state of charge, generator status, and power requirements to determine the optimal power source combination. This dynamic adaptation allows the system to maintain ease of operation while maximizing operating range.
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 hybrid power system achieves efficient operation by automatically switching between battery power and generator power based on charge levels, providing the necessary peak power and range for typical mowing jobs while being user-friendly and convenient.
Implementation Method 1
The primary battery may be configured to independently power an electric motor for a drive wheel or wheels to move the mower and an electric motor for powering the cutting unit of the mower
Implementation Method 2
The generator may be powered by an engine, such as an internal combustion engine, to produce electricity
Implementation Method 3
The generator may be powered by an engine, such as an internal combustion engine, to produce electricity
Data Source
AI summary
A mower with a hybrid electric power system and a method of operation therefor. The mower comprises a drive wheel for propelling the mower, a cutting unit configured to cut grass, a first motor operatively connected to the drive wheel, a second motor operatively connected to the cutting unit, a primary battery and a generator connected to the first motor and the second motor to each independently power the first motor and the second motor, and a control unit configured to switch the mower between operating conditions when it is powered by the primary battery or by the generator. An auxiliary battery is connected to the first motor and can power the first motor to drive the mower when the primary battery is out of charge and the generator is out of fuel.