After The APS Accident, Lithium-ion Batteries Were Evaluated: “Not Careful, Will Bring Unacceptable Risks”?

- Aug 14, 2019-

Although the investigation of the APS fire at the McMicken plant is still in progress, the investigations within the APS have not yet reached a true conclusion. However, Kennedy cited the lessons of the 2012 Eldon substation fire and considered the utility scale. Lithium-ion batteries are "not prudent and pose unacceptable risks."

APS has promised to launch a landmark 850 MW energy storage and at least 100 MW solar power project by 2025. Despite the McMicken fire, the company did not abandon plans to continue the deployment, and the energy storage industry is closely watching the action. Kennedy said, “The committee has to make sure that all types of energy storage devices are safe, reliable and cost-effective for consumers. There is no doubt that all assets deployed and operated on the grid must meet these requirements. ""

She proposes some other types of energy storage equipment, including non-battery energy storage equipment that is competitively priced. She believes that liquid metal batteries include "cheap, abundant raw materials, very safe operating characteristics, and multiple charge and discharge cycles without degradation." She also recommends the use of zinc air batteries, magnesium batteries and nickel-iron batteries. ......

t is worth noting that Kennedy also said that there are some lithium-ion batteries that use different chemicals, which are more sustainable and have a lower risk than the batteries used in several substations where APS accidents occur. Need to explain here, Japan, South Korea and Europe and the United States storage batteries mostly use ternary lithium-ion batteries, the outbreak of 21 energy storage power stations in South Korea has caused concerns in the industry on ternary lithium-ion batteries, and even led to the energy storage industry in its Domestic stagnant development. In China, based on safety and cycle standards, the construction of energy storage power plants basically uses lithium iron phosphate batteries. According to the relevant personnel of CATL, lithium iron phosphate batteries are not prone to fire and explosion due to their chemical characteristics. At present, foreign companies have consulted the company about this aspect of information.

It is understood that the European Space Agency launched a corporate responsibility initiative this spring, and public utilities such as Duke University and Eversource are committed to “improving best practices in the energy storage supply chain”.

The three energy storage systems deployed by APS are operated by Fluence, a joint venture between AES and Siemens.

Fluence's chief operating officer, John Zahurancik, is clearly different from Kennedy. He said: "The world's 9000 MW energy storage equipment is in operation and should be safe, controllable and pre-designed. Lithium-ion batteries are used in the environment.” He believes that “all power generation, distribution and transmission technologies pose a certain degree of risk and require careful operation and proper safety protection. Lithium-ion battery storage has proven to be safe for many years. Public utility companies around the world use it as an important part of our energy mix."