Lithium SAFEFlex: Safety Review
Why our lithium systems are safe for the Material Handling Market:
In the battery power market today, there are a myriad of available battery types to choose from. It’s a critical decision which not only impacts how well the product will operate, but also how safely it can operate. Factors such as how much power is required, the time required to charge, operating temperatures, operating environment, packaging dimensions, and weight are all examples of key parameters that must be considered. The Material Handling / Motive Power battery market requires some of the highest power products In the world, so safety is a necessity.
Safety by Design
The Green Cubes Technology engineering team has extensive experience in working with various battery technologies. This wealth of experience and knowledge of the various available battery technologies was used in selecting the optimal chemistry for the material handing market. By selecting Lithium Iron Phosphate (LFP) for the Lithium SAFEFlex material handling batteries, the team utilized a lithium chemistry that is first and foremost known for its inherent safety.The chemical structure is also important. While higher energy lithium chemistries are available, LFP was selected due to its stable chemical make-up. The Phosphate and Oxygen bond is both thermally and chemically stable due to the single-dimensional lattice structure. Its 1D lattice structure limits how lithium ions are transferred. This transference limitation enables improved stability and cycle life. A demonstration of how much more stable the LFP chemistry is compared to the longer established high energy Lithium Cobalt Oxide (LCO), i.e. the lithium battery used in consumer electronics, is to compare thermal runaway temperatures, which are the high temperatures at which the chemistries begin to become unstable and volatile. LCO has a much lower thermal runaway temperature of 150 C (302 F) compared to the LFP’s thermal runaway temperature of 270 C (518 F). This large difference shows LFP to be the much safer of the two lithium chemistries.In addition to the chemistry selection, the physical construction is an important parameter to consider in the design selection process. All lithium batteries contain a critical component called the separator, which is placed in between the anode and cathode layers in the electrode. The separator limits the chemical reaction of the electrode and helps to prevent thermal runaways by closing its porous structure at high temperatures. The GCT team has selected cells which incorporate ceramic separators. The ceramic material is resilient at high temperatures and helps prevent the breakdown of the separator that occurs during a thermal runaway event.
Safety by Product Experience
Over the past 20 years, Green Cubes Technology has designed and produced millions of lithium battery systems along with other chemistries such as NiMH, NiCd, and lead acid. GCT has life-saving batteries integrated in Lexus vehicles, mines, hospitals, and a multitude of other industrial and rough environment applications. Our Lithium SAFEFlex batteries have specifically been utilized in on-road trucks in the US, electric vehicles across India, and in the material handling industry over the past 4 years. With over 30 years experience in power, GCT is an engineering driven company with its top focus on safety.
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