Battery Pack Discharge Range Control for Different Tool Loads
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Solution Overview
Problem
Existing battery packs have a fixed discharge prohibition condition, which does not adapt to different power supply targets, leading to reduced practical utility as the same discharge prohibition is applied regardless of the electric work machine's specifications or connection status, potentially causing inefficiencies and operation interruptions.
Innovation Solution
A battery pack with a coupling portion, connection determiner, receiver, and prohibition range controller that adjusts the discharge prohibition range based on the connection or specification of the electric work machine, including load, presence of actuators, cooling fans, and battery block configuration, to optimize protection and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed discharge prohibition condition is applied to all power supply targets, then battery protection is simplified and device complexity is reduced, but practical utility and adaptability deteriorate due to unnecessary discharge interruptions for different electric work machine specifications
Solution Approach 1:
The discharge prohibition range is made dynamic rather than fixed. The control unit adjusts the prohibition range based on real-time detection of electric work machine connection status and specifications. This allows the system to adapt to different power supply targets while maintaining manageable complexity through automated detection and adjustment mechanisms.
Solution Approach 2:
The discharge prohibition parameters (current range and voltage range) are changed based on the detected electric work machine specifications. The control unit receives work machine information including specifications, and accordingly adjusts the prohibition range parameters to match the specific power supply target, improving adaptability without requiring complex manual configuration.
2Productivity
If discharge is prohibited under fixed conditions regardless of connection status, then battery protection is ensured, but operation efficiency deteriorates due to unnecessary interruptions during examination or normal operation
Solution Approach 1:
The system implements feedback control by detecting the connection status and specifications of the electric work machine, then using this information to adjust the discharge prohibition range. This feedback mechanism ensures that discharge is only prohibited when truly necessary for battery protection, while allowing discharge during examination or normal operation, thus maintaining both operation efficiency and battery protection reliability.
Solution Approach 2:
The control unit performs preliminary detection of the electric work machine connection and specifications before applying discharge prohibition. This preliminary action allows the system to prepare appropriate prohibition parameters in advance, avoiding unnecessary discharge interruptions and ensuring smooth operation during examination or normal use while maintaining battery protection.
3Adaptability or versatility
If the same prohibition range is used for examination devices and electric work machines, then control simplicity is maintained, but practical utility deteriorates due to inappropriate discharge prohibition during examination
Solution Approach 1:
The discharge control system is designed to be universal, handling both examination devices and electric work machines through a single integrated control unit. The control unit automatically detects the connection target type and adjusts the prohibition range accordingly, providing multi-functionality without requiring separate control systems, thus maintaining ease of operation while improving adaptability to different connection targets.
Data Source
AI summary
A battery pack includes a battery, a coupling portion, a connection determiner, a receiver, and a prohibition range controller. The prohibition range controller varies a prohibition range depending on the connection or non-connection of the electric work machine that is determined by the connection determiner, or the specification of the electric work machine connected to the coupling portion. The prohibition range is defined by a current range and a voltage range. A discharge from the battery is prohibited in the prohibition range.