Battery Power Tool Contacts for 70A Cutting Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery-operated cut-off grinders often have excessively low performance, making it difficult to carry out high-power cutting or cutting-off work effectively.
Innovation Solution
A power tool with a high output current energy supply device, utilizing powerful rechargeable batteries and a contact system with large contact areas to transmit electrical energy, enabling continuous currents of over 70 amperes and a high power-to-weight ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If battery-operated power tools are used to replace gasoline-powered tools, then ecological performance is improved, but power output deteriorates
Solution Approach 1:
The power tool system is segmented into modular components: the main tool body and separate battery units. Multiple battery units can be combined to provide different power levels, allowing the system to deliver high power output (70A+ current) while maintaining the ecological benefits of battery operation. The segmentation enables flexible configuration to match power requirements.
Solution Approach 2:
Multiple battery units are merged/combined to form a powerful energy supply device. The patent specifically describes combining two or more batteries to achieve high output currents of 70 amperes or more, thereby resolving the power limitation while maintaining ecological performance through electric power operation.
2Power
If high power output is achieved in battery-operated tools, then cutting performance is improved, but device weight increases
Solution Approach 1:
The heavy battery power source is segmented into separate, removable units that can be attached to the lighter tool body only when high power is needed. This allows the tool itself to remain lightweight for handling, while the power density is increased by adding battery units as required for specific cutting tasks.
Solution Approach 2:
The power supply configuration is made dynamic and adaptable. The system can operate with different battery configurations depending on the task requirements, allowing the user to balance between weight and power output. The contact system dynamically adjusts to accommodate different battery unit combinations.
3Power
If contact area is increased to transmit high current, then current transmission capability is improved, but device complexity increases
Solution Approach 1:
The contact system is designed with universal, standardized contacts that can accommodate different battery configurations. The contacts serve multiple functions: electrical connection, mechanical coupling, and configuration identification. This universal design simplifies the overall system despite the need to transmit high currents, as the same contact interface handles various power levels and battery arrangements.
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 solution provides a powerful and efficient battery-operated power tool capable of handling demanding cutting tasks with high output currents and a surprisingly low weight, ensuring effective and prolonged use without user impairment.
Implementation Method 1
The contact system makes it possible to continuously transmit current of more than 70 amperes, preferably more than 73 amperes, and most preferably of more than 80 amperes, between rechargeable batteries and the power tool
Data Source
AI summary
A power tool having a motor and an energy supply device, wherein an output current from the energy supply device to the power tool is greater than or equal to 70 amperes. The power-to-weight ratio of the power tool is in a range of greater than or equal to 0.30 kW/kg, for example. In addition, a power-to-weight ratio L of the power tool can preferably be in a range of greater than or equal to 0.30 kW/kg. In addition, a contact system for transmitting electrical energy from the energy supply device to the power tool is disclosed, wherein the contact system has at least one first contact and at least one second contact, wherein a contact area between the two contacts has a size of greater than or equal to 20 mm2.