Portable Drawn Arc Stud Welder With LFP Battery Heat Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing portable battery-powered drawn arc stud welding systems face limitations in providing high weld currents and voltages while being compact and lightweight, with existing battery types suffering from issues like toxicity, short cycle life, and hazardous disposal, and failing to meet the requirements for full strength welds in structural applications.
Innovation Solution
A portable drawn arc stud welding system utilizing a lithium ferrophosphate (LFP) battery with a stud weld battery control system (SWBCS) that includes a digital controller for temperature monitoring and fan activation to manage heat, enabling continuous trickle charging and preventing thermal runaway, thus providing a safe and efficient power source for high-current welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If lead acid batteries are used to provide high current capacity for drawn arc stud welding, then the required weld current can be achieved, but the system becomes large, heavy, and difficult to transport
Solution Approach 1:
The patent changes the chemical composition parameters of the battery from lead acid to lithium ferrophosphate, which fundamentally alters the specific energy and weight characteristics while maintaining the required power output capability for drawn arc stud welding
2Power
If multiple lead acid batteries are used to achieve required power output, then high current capacity is obtained, but the device complexity and size increase
Solution Approach 1:
The patent changes the battery chemistry from lead acid to lithium ferrophosphate, which provides higher specific energy and allows achieving the required current capacity with a single battery or fewer batteries, thereby reducing system complexity
3Power
If lead acid batteries are used in portable welding systems, then power supply is available, but the systems require long recharge periods and have extended lost operational time
Solution Approach 1:
The patent changes the battery chemistry to lithium ferrophosphate, which has superior charge acceptance characteristics and lower internal resistance, enabling faster charging rates and reducing the time lost during recharge operations
4Power
If lead acid batteries are used to provide sustained power, then current capacity is achieved, but thermal management becomes difficult and overheating occurs
Solution Approach 1:
The patent changes the battery chemistry from lead acid to lithium ferrophosphate, which has better thermal stability and heat dissipation characteristics, allowing the battery to sustain high current discharge without excessive temperature rise
5Power
If lead acid batteries are used in welding systems, then power delivery is possible, but hazardous conditions arise from acid leakage and hydrogen gas emission
Solution Approach 1:
The patent changes the battery chemistry from lead acid to lithium ferrophosphate, which is sealed and does not leak corrosive acid or emit explosive hydrogen gas during normal operation or even during thermal runaway events
Solution Approach 2:
The patent uses lithium ferrophosphate, a composite material with inherent safety features including phosphate group stability that prevents thermal runaway, eliminating the hazardous emissions associated with traditional lead acid battery chemistry
6Power
If lead acid batteries are used for portable welding, then power supply is available, but environmental disposal becomes problematic due to toxic lead
Solution Approach 1:
The patent changes the battery chemistry from lead acid to lithium ferrophosphate, which uses non-toxic materials that can be disposed of environmentally friendly, eliminating the lead contamination issues associated with traditional battery disposal
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 system delivers full strength stud welds suitable for structural applications, is compact and lightweight, and offers extended operational time without the need for frequent recharging, with the LFP battery being intrinsically safe and environmentally friendly.
Implementation Method 1
a lithium ferrophosphate (LFP) battery with a stud weld battery control system (SWBCS)
Implementation Method 2
fan activation to manage heat
Data Source
AI summary
A portable drawn arc stud welder apparatus with a lithium ferrophosphate (LFP) battery and stud weld battery control system (SWBCS) is provided for welding a stud onto a workpiece. The portable drawn arc stud welder apparatus includes a housing, an LFP battery disposed in the housing and including a plurality of LFP battery cells, a weld stud gun configured to hold a stud and is electrically connected to the LFP battery for receiving energy from the LFP battery to pass a current through the stud and the workpiece to form a weldment. The SWBCS is disposed in the housing and electrically connected to the LFP battery of the portable drawn arc stud welder apparatus. The SWBCS includes a computer, a memory, and instructions therein to implement control and monitoring of the operation of the portable drawn arc stud welder apparatus.