The purpose of this document is to establish a standard method to calculate the thermal conductivity of a graphite foil from the measured bulk density, specific heat capacity, and thermal diffusivity of a specimen. The document will provide a procedure to measure each property in the calculation. […]Learn More
Next-generation electric vehicles (EV), electric airplanes (ePlane), and marine battery systems require rapid charging, high energy density, safety, and long lifespans. For this, they need thermal-management materials that are thin, lightweight, and durable. These materials must not only cool the cells during harsh charging and operating conditions but also prevent propagation in case of a cell failure. SpreaderShield® flexible graphite is used as cooling fins between the cells of a pack or module. It directly replaces bulky, heavy aluminum fins in these lithium-ion battery packs, where being lightweight, compact, and safe is essential.Learn More
The UAV and eVTOL industries have experienced significant growth over the past decade, driven by advancements in technology and increasing applications across various sectors, including military, agriculture, logistics, surveillance, and entertainment. These advancements have led to improved performance and safety of UAVs and eVTOLs, including the critical battery systems that power these aerial vehicles. The engineers and the R&D team at NeoGraf Solutions, continue to find the best graphite thermal management solutions for this rapidly evolving market. Learn More
NeoGraf Solutions' Graf-M™ masterbatches represent a cutting-edge approach to enhancing polymer performance through the incorporation of graphite-based additives. These innovative products combine pelletized masterbatches and dispersions with NeoGraf's Graf+® graphite powders, Graf-X™ graphene nanoplatelets, and GrafGuard® expandable graphite flakes, offer manufacturers a powerful tool to elevate their materials' capabilities and simplify the manufacturing process. […]Learn More
An emerging trend over the last two to three years has been to add layers of thermal insulation and flame/gas impingement barriers between the pouch and prismatic format cells in a battery pack to prevent thermal propagation. This passive thermal management solution has been shown to effectively prevent propagation without adding excessive weight to the battery. The obvious downside of this method is that the battery cells are surrounded by insulation, and there is no easy path for the internal heat of the cells to spread to the environment outside of the pack. How do you fix the problems caused by using an insulation-only strategy? It’s simple: Add NeoGraf Solutions’ SpreaderShield™ thin, flexible, and lightweight graphite heat spreader to the battery pack. [...] Learn More
ASTM E-84 is the standard test method for assessing the surface burning characteristics of building products. A new white paper from NeoGraf Solutions, “GrafGuard® Expandable Graphite Systems Help Meet ASTM E-84 Testing Requirements” discusses how GrafGuard® expandable graphite expands into a charred intumescent foam when exposed to the heat or flame, protecting the substrate and helping to pass the ASTM E-84 requirements. Minimizing both the smoke development and flame spread maximizes the potential flame spread index classification of the material. [...]Learn More
In many early battery-powered electric vehicles, cell temperatures were controlled by aluminum. It was a time-tested thermal management material and it could take on some of the structural duties of the battery pack. Battery pack designers recognized aluminum’s drawbacks and began looking for alternative thermal management materials. To spread the same amount of heat as an aluminum plate, NeoGraf Solutions’ SpreaderShield™ flexible graphite is only half of the thickness and one-third of the weight. […..] Learn More
Protecting people and property from fire is crucial, and fire retardants play a vital role in achieving this goal. While various fire retardants exist, melamine-based options raise concerns due to their EU classification as substances of very high concern (SVHC) in the REACH regulations. GrafGuard® expandable graphite from NeoGraf Solutions is a safe and effective replacement for melamine-based fire retardants […..]Learn More
The fuel cell industry is a rapidly increasing market segment and well poised to achieve $7.2 billion by 2030. The primary industries that are driving the increased demand for fuel cell applications include automotive, stationary and supplemental power, and portable electronics. [...]Learn More
In order for battery powered transportation to become fully viable in the near future, energy density of the battery pack must increase. The optimal solution is to use large surface area pouch cell batteries packed tightly together to form highly energy dense modules. NeoGraf Solutions’ has produced a new video that shows unique an-isotropic arrangement of the high conductivity graphene layers in their SpreaderShield™ graphite. It illustrates how the material prevents battery hot spots, maintaining allowable temperatures and restricts transferring the heat to adjacent battery cells with the thinnest and lightest form-factor possible. [...]Learn More
