Construction Machinery Battery Pack Power Mode Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Construction machines equipped with battery power systems cannot display remaining electric power for unselected limited power modes, making it difficult to manage battery usage and replacement efficiently.
Innovation Solution
A control section calculates and a display device shows the remaining electric power for each limited power mode based on battery state of charge and voltage specifications, allowing for easy battery replacement and improved work management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery control unit and battery are integrated to form a battery pack for safety improvement, then reliability is improved, but ease of operation deteriorates because battery replacement requires overwriting specification data in the main control unit
Solution Approach 1:
The patent stores specification information (battery voltage, internal resistance, clamping voltage, minimum voltage) in the battery control unit's storage device rather than the main control unit. When a battery pack is replaced, the new battery control unit automatically provides its own specification data through the communication line, eliminating the need to manually overwrite data in the main control unit. This copying approach allows seamless battery replacement while maintaining safety through integration.
2Device complexity
If the main control unit calculates remaining electric power using data stored in itself, then device complexity is reduced, but ease of operation deteriorates because remaining electric power for unselected limited power modes cannot be displayed
Solution Approach 1:
The patent enables the display device to show remaining electric power for multiple limited power modes simultaneously by having the battery control unit calculate and provide this data for all modes through the communication line. The main control unit receives and displays this comprehensive information without needing to perform complex calculations itself, allowing operators to compare and select the most appropriate power mode based on real-time battery status and work requirements.
Data Source
AI summary
A construction machine is provided with management units (11, 12) configured to control the construction machine based on a plurality of limited power modes prescribed to control the output of a battery pack (18), and calculate an amount of electric power stored in the battery pack in each of the limited power modes based on specification information about the battery pack, on the state of charge of the battery pack, and on limited power and an operating voltage prescribed for each of the limited power modes; and a display device (14) configured to display the amount of electric power in each of the limited power modes based on the amount of electric power calculated by the management units. This allows the amount of electric power in the unselected limited power modes to be displayed and facilitates battery replacement work.