Multi-Battery Riding Mower Current Limiting for Safe Power Sharing
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Solution Overview
Problem
Riding-type mowers powered by diesel fuel face environmental pollution and high maintenance costs due to frequent replacement of vulnerable fuel system parts.
Innovation Solution
A riding-type mower powered by a battery pack with a current-limiting protection method, featuring a power supply device with multiple battery packs and a power management module that monitors and controls the output current to prevent overcurrent, allowing the mower to be used with hand-held electric tools and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If diesel power is used in riding-type mowers, then the mower can achieve sufficient power output, but environmental pollution increases and maintenance costs rise due to frequent replacement of fuel system parts
Solution Approach 1:
The patent replaces the diesel mechanical power system with an electrical power system consisting of battery packs and a power management module. This substitution eliminates exhaust emissions and fuel system components, thereby reducing environmental pollution while maintaining sufficient power output for mower operation.
Solution Approach 2:
The patent changes the energy source parameter from chemical energy (diesel) to electrical energy (battery packs). This parameter change fundamentally alters the power delivery mechanism, eliminating combustion-related pollution while providing controlled electrical power to the mower's motors and accessories.
2Power
If diesel power is used in riding-type mowers, then the mower can achieve sufficient power output, but maintenance costs increase due to frequent replacement of vulnerable fuel system parts
Solution Approach 1:
The patent replaces the complex mechanical diesel engine system with a simpler electrical system comprising battery packs and a power management module. This substitution eliminates vulnerable fuel system components such as fuel injectors, fuel filters, and carburetors that require frequent maintenance, thereby reducing maintenance costs while delivering adequate power.
Solution Approach 2:
The patent extracts and removes the entire fuel system from the powertrain, eliminating components that are prone to failure and require replacement. By taking out the diesel engine and its associated fuel delivery system, the design eliminates the source of maintenance problems while retaining power delivery capability through electrical motors.
3Power
If multiple battery packs are connected in parallel to increase current output, then the power supply capacity increases, but the risk of overcurrent damage increases
Solution Approach 1:
The power management module continuously monitors the output current from each battery pack and the total current, comparing these values against preset thresholds. When overcurrent conditions are detected, the module provides feedback control by adjusting or disconnecting individual battery pack connections, thereby preventing damage while maintaining maximum safe power output.
Solution Approach 2:
The power management module acts as an intermediary between the parallel-connected battery packs and the load. It mediates current distribution among battery packs, monitors overall current levels, and controls switching between battery packs to prevent overcurrent conditions, thereby enabling safe parallel operation to increase power capacity.
4Reliability
If the power management module monitors and controls current output to prevent overcurrent, then system reliability improves, but device complexity increases
Solution Approach 1:
The power management module automatically monitors current levels, detects overcurrent conditions, and executes protective actions without external intervention. The system self-regulates by controlling switching elements to disconnect or rebalance battery pack connections, providing overcurrent protection through autonomous operation that minimizes the need for additional control systems.
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 battery-powered riding-type mower reduces environmental pollution and maintenance costs while providing a versatile energy source for both the mower and hand-held tools, ensuring efficient and safe operation by managing current output.
Implementation Method 1
The power supply device includes a plurality of battery packs and a power management module. The plurality of battery packs are configured to supply an energy source to the riding-type mower
Implementation Method 2
A current-limiting protection method... The power management module is configured to determine whether the plurality of battery packs satisfy a discharge condition and control a battery pack satisfying the discharge condition to discharge
Data Source
AI summary
A riding-type mower includes a power supply device and the power supply device includes a plurality of battery packs and a power management module. The plurality of battery packs are detachably mounted to the riding-type mower and further configured to supply electric energy to a hand-held electric power tool. The plurality of battery packs each are provide with at least one battery cell group, and each battery cell group includes a plurality of battery cells electrically connected to each other. The power management module is configured to determine whether the plurality of battery packs satisfy a discharge condition and control a battery pack satisfying the discharge condition to discharge when the battery pack satisfies the discharge condition.