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This means that, on the one hand, there may be accessibility issues as the testing is performed on already assembled modules or packs, and on the other hand, key performance indicators for battery welding applications, such as electrical and fatigue performance of the joints, are not served.
Moreover, the high-volume production requirements, meaning the high number of joints per module/BP, increase the absolute number of defects. The first part of this study focuses on associating the challenges of welding application in battery assembly with the key performance indicators of the joints.
The quality assurance for battery welding applications is still in its infancy. Commercial solutions exist, but dedicated solutions are based on end-of-line approaches, while online solutions tend to address the generic quality issues of a specific welding process.
Different welding processes are used depending on the design and requirements of each battery pack or module. Joints are also made to join the internal anode and cathode foils of battery cells, with ultrasonic welding (UW) being the preferred method for pouch cells.
Other joining methods such as micro-tungsten-inert-gas welding (micro-TIG), micro-clinching, soldering, and magnetic-pulse welding exist and have been proposed for battery assembly applications, but they are not well established, and therefore their feasibility is still being evaluated, or they are not widely used in the industry.
Process optimisation is by far the most researched area of quality assurance for battery welding applications. Most of the studies have been carried out either as pure experimental investigations to find the process parameters that optimise one or more KPIs of a joint, suppress defects, or validate a process model.
This article proposes a lightweight deep-learning algorithm called MGNet for detecting welding defects in the current collectors. We introduce a lightweight MDM module …
The assessment of welding quality in battery shell production is a crucial aspect of battery production. Battery surface reconstruction can inspect the quality of the weld instead of relying …
Focus on our welding defect detection task for ithium battery''s pole, an improved detection algorithm based on the Yolov5 model is proposed in this paper. Specifically, the SE …
Vanadium pentoxide (V2O5) is an attractive high-energy cathode material for thermal batteries but is limited by the high solubility and tendency to react with halogenic …
The quality assurance for battery welding applications is still in its infancy. Commercial solutions exist, but dedicated solutions are based on end-of-line approaches, …
The future direction of global automotive development is electrification, and the battery current collector (BCC) is an essential component of new energy vehicle batteries. …
Compared with thick plate joints, thin plates are prone to welding defects in the welding process, such as initial welding deformation (bending of base metal), welding angle deformation and...
We built an experimental dataset of safety vent welding defects with a total of 7263 original images, which were collected from a battery manufacturing production line.
In conclusion, this piece identifies technical obstacles that need to be urgently overcome in the future of new energy vehicle power batteries and anticipates future development trends and ...
The rechargeable lithium metal batteries can increase ∼35% specific energy and ∼50% energy density at the cell level compared to the graphite batteries, which display great potential in portable electronic devices, …
According to reports, the energy density of mainstream lithium iron phosphate (LiFePO 4) batteries is currently below 200 Wh kg −1, while that of ternary lithium-ion batteries …
The first part of this study focuses on associating the challenges of welding application in battery assembly with the key performance indicators of the joints.
Redox flow battery (RFB) is a chemical energy storage technology applied to large-scale power generation sites. 1 Due to its preponderance of protruding energy efficiency, low emission, flexible capacity …
Compared with thick plate joints, thin plates are prone to welding defects in the welding process, such as initial welding deformation (bending of base metal), welding angle …
Laser welding is widely used in lithium-ion batteries and manufacturing companies due to its high energy density and capability to join different materials. Welding …
The quality assurance for battery welding applications is still in its infancy. Commercial solutions exist, but dedicated solutions are based on end-of-line approaches, …
In order to meet the needs of new energy vehicles, the 21700 battery uses copper tab as the anode, which can minimize the internal resistance and improve the charge …