Nickel Metal Hydride No. 5 battery

How long can a power Nickel Metal Hydride No. 5 battery work after it is transformed into an energy storage battery

After Nissan and its supplier EDF Energy cooperated to explore retired battery energy storage, there are new projects for electric vehicle batteries to be used for energy storage.

Engie, a multinational power company, has launched a new grid-connected energy storage project in Rotterdam, the Netherlands. The energy storage project uses second-life batteries to provide grid balancing services for the transmission and distribution company TenneT.

The first phase of the project is 150kW/90kWh in scale. The Engie team installed a series of second-life electric vehicle batteries through a new system architecture, increasing power and capacity while reducing costs. The system was developed by energy storage technology company Connected Energy and is named E-Stor. After passing the initial stage review, E-Stor will be deployed on a large scale in many other locations in the Nordic region.

The second and third phases of the project will start in early and late 2019, respectively. The rated power of the second phase is expected to be 1MW, and the capacity of the third phase will be larger, but the specific scale is currently unknown.

The characteristic of Connected Energy's products is that each battery pack is controlled individually using the battery pack's own management system. In this way, the health status, charging and thermal parameters of each battery pack can be monitored and manipulated accordingly, so that the capacity utilization of each battery is optimized.

In addition to providing grid frequency control services, E-stor system batteries can also provide other grid services such as operating reserves and primary control.

It has been reported that the second-life EV battery market is currently experiencing a snowball expansion, and it is estimated that the second-life batteries used in energy storage systems may reach a capacity of 42GWh in 2025. The report also emphasizes that after the standardization-related improvements in its manufacturing process, the use of such second-life batteries can be achieved at a lower cost, which can further increase the benefits of market stakeholders.

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