Lithium-Ion Battery Powered Strapping Device Friction Welding
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Solution Overview
Problem
Existing mobile strapping devices for packaging goods with plastic straps face issues of low functional reliability and operator effort due to inadequate energy supply and connection quality, especially when using conventional batteries.
Innovation Solution
The use of a lithium-ion storage battery powering a brushless direct current motor with a planetary gear system for the friction welder, allowing for high-speed operation and adjustable tensioning, along with a toggle lever system for enhanced reliability and automation, addresses these challenges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional storage batteries are used in mobile strapping devices, then the device portability is maintained, but the functional reliability and connection quality deteriorate due to insufficient energy supply
Solution Approach 1:
The patent applies parameter changes by switching from conventional storage batteries to lithium-ion storage batteries, which have superior energy density and voltage characteristics. This parameter change in the energy storage medium resolves the contradiction by providing sufficient energy supply capacity while maintaining device portability and improving functional reliability for high-speed friction welding operations
2Reliability
If high drive-side rotational speed (6000-7000 rpm) is maintained for friction welding, then connection quality is improved, but energy consumption increases rapidly
Solution Approach 1:
The patent applies continuity of useful action by ensuring uninterrupted high-speed operation of the friction welder through lithium-ion battery power. The battery's high energy density enables continuous operation at 6000-7000 rpm without frequent recharging, maintaining consistent connection quality while optimizing energy utilization through automated control that eliminates idle periods and ensures the battery is recharged when connection quality begins to deteriorate
3Productivity
If automated strapping procedures with motorized drive movements are implemented, then productivity is improved, but operational complexity increases
Solution Approach 1:
The patent applies universality by implementing a control device that manages multiple functions including motorized tensioner operation, friction welder control, and battery charge state monitoring through a single integrated system. This multi-functional approach increases productivity through automation while managing operational complexity by consolidating control functions into one unified interface rather than separate independent systems
4Weight of moving object
If the storage battery is made smaller to reduce weight, then portability is improved, but energy capacity decreases
Solution Approach 1:
The patent applies parameter changes by utilizing lithium-ion storage batteries which have superior energy density compared to conventional batteries. This allows the energy capacity parameter to be maintained or increased while the weight parameter is reduced, resolving the contradiction by changing the fundamental parameters of the battery chemistry and physical properties
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
This configuration provides prolonged high-quality strapping cycles, improved connection reliability, reduced weight, and simplified operation, ensuring durable seals even when the battery is not fully charged, with the lithium-ion battery maintaining voltage for longer and the brushless motor allowing precise control of tension and speed.
Implementation Method 1
the energy storage means has a lithium-ion storage battery (15) which provides energy to drive a connector (10) designed in the form of a friction welder
Implementation Method 2
powering a brushless direct current motor with a planetary gear system for the friction welder
Implementation Method 3
brushless direct current motor with a planetary gear system
Implementation Method 4
a friction shoe moving in an oscillating manner is pressed onto the area of two ends of the strap loop. The pressure and the heat produced by the movement briefly locally melt the strap
Data Source
AI summary
A mobile strapping device for strapping packaged goods with wrap-around strap, comprising a tensioner for applying a strap tension to a loop of a wrapping strap, and a connector for producing a connection in two areas of the loop of the wrapping strap disposed one on top of the other, and a chargeable energy storage means for storing energy that can be released as drive energy for motorized drive motions at least for the friction welder for producing a friction welded connection and/or for the tensioner, is intended to have high functional reliability and ease of handling despite the possibility of automated production of wrapped straps, at least to a large extent. To this end, it is proposed that the energy storage means of the strapping device comprise a lithium ion battery for providing energy for driving a connector designed as a friction welder.