Work Vehicle Power Control Device for Battery Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing electric power control systems for work vehicles, such as riding lawnmowers, face challenges in maintaining smooth operation due to varying battery power output influenced by temperature, stored energy, and deterioration, leading to potential power shortages and heat generation, which can hinder travel and utility work.
Innovation Solution
An electric power control device that acquires operational and battery state information to dynamically distribute power between travel and implement units, using maps or calculations to optimize motor speed and torque, preventing overload and ensuring continuous operation by prioritizing power allocation based on current conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If rotational speed control is performed based on output current alone, then the control system is simple, but electric power shortage and heat generation occur due to varying battery power output
Solution Approach 1:
The control system transitions from controlling only rotational speed based on current to controlling both rotational speed and torque by acquiring multiple parameters including battery temperature, stored electric power amount, and degree of deterioration. This multi-parameter approach allows the system to adapt to varying battery conditions and prevent power shortage and heat generation.
2Device complexity
If battery power output is not monitored, then the control system is simple, but power shortage and deterioration occur
Solution Approach 1:
The system performs preliminary acquisition of battery information including temperature, stored electric power amount, and degree of deterioration before controlling motor operations. This advance monitoring enables the control device to predict potential power shortages and adjust operations proactively to prevent deterioration and ensure continuous reliable operation.
3Ease of operation
If motor speed and torque are not limited dynamically, then the system operates freely, but overload to battery occurs causing deterioration
Solution Approach 1:
The control device continuously acquires feedback information about battery temperature, stored electric power amount, and degree of deterioration. Based on this real-time feedback, the system dynamically adjusts and limits motor speed and torque to prevent overload conditions that would cause battery deterioration, while maintaining operational freedom within safe parameters.
Data Source
AI summary
Provided is an electric power control device that allows a work vehicle to travel while carrying out a utility work smoothly. An electric power control device includes an operational state information acquisition section for acquiring operational state information indicative of an operational state of a work vehicle, a battery information acquisition section for acquiring battery information indicative of a state of a battery which is mounted on the work vehicle, a storage section for storing in advance operational mode information, a travel unit that causes the work vehicle to travel, a distributed electric power calculation section for calculating distributed electric powers to be distributed to the travel unit and an implement unit that effects the utility work respectively, and an instruction section for instructing the distributed electric powers to a travel control section that controls the travel unit and an implement control section that controls the implement unit, respectively.