AMETEK Nickel Strip for Battery Connections with Highest Electrical Conductivity

Batteries

Our pure nickel strip has been the premier material for battery connections for decades. The high purity of our material offers the highest conductivity of commercially manufactured nickel products due to the low impurity level. These non-metallic inclusions are impurities that are imparted to cast products as a result of hot rolling slabs in an unprotected environment.

We maintain a low temperature cold rolling process to minimize the impurities from forming. The conductivity of our Nickel Strip is 15-20% higher than competitive materials. This higher conductivity allows for manufacturers and designers to continue miniaturizing the sizes of the battery connections without sacrificing power handling capabilities.

Download our Nickel Strip White Paper to find out more about the benefits of our high purity powder metallurgy strip alloys in high reliability battery applications.

Pure Nickel Strip Grades 
Three AMETEK SMP grades, AME270-899A, AME200-899L, and AME205-899D, are currently used in different battery applications.

  • Grade AME270-899A finds limited use as a tab material in special applications.
  • Grade AME-899L has more widespread use as a tab and perforated substrate in Ni-Cd batteries, and as cathodes, frames for expanded metal anodes and bus bars in lithium-thionyl-chloride batteries.
  • Grade AME205-899D is used as deep-drawn casings, headers, and expanded metal for various lithium-based batteries.

Battery Applications
Critical battery applications include power tools, GPS, e-bikes, hybrid electric vehicles, oil pipelines, consumer electronics, pacemakers, infusion pumps, neurostimulation, defense communications, navigation and missiles and in aerospace aircrafts.

Wrought Powder Metallurgy Process
Our manufacturing process produces pure nickel strips with mechanical properties that offer major advantages for battery systems. This involves roll compaction of powder into strip, sintering, further densification, homogenization, and purification using a series of cold roll and thermal treatment steps. The term‚ ”wrought powder metallurgy strip” is used to differentiate the product from other powder metallurgy products which have been compacted and sintered but not worked to full density to optimize mechanical properties.

Thermal Conductivity
Comparison of independent laboratory results indicates approximately 10% higher thermal conductivity of AME200-899L over N02201. The combination of higher thermal conductivity and lower electrical resistivity combine to reduce temperature excursions during overload conditions.

Electrical Resistivity
The low values for AME270-899A explain usage as a tab material in special military applications requiring lowest available electrical resistivity in a commercial nickel.

However, grade AME200-899L is recommended for general usage in components requiring low electrical resistivity as electrical resistivity is only slightly higher (1.3%) and the alloy offers resistance to sulfur embrittlement, improved formability, and much better weldabllity.

Oxidation
Oxidation/reduction behaviour is important in perforated nickel used as an electrode substrate for slurry overcoating in high reliability Ni-Cd batteries. Field experience has shown AME200-899L to be a preferred grade as oxidation is predictable.

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