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Home Battery Technology

Svolt introduces NMX cobalt-free batteries

January 23, 2021
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Svolt NMX cobalt-free battery

The global battery manufacturer Svolt (SVOLT Energy Technology Co., Ltd.) recently announced (SVOLT) that its new battery cells with cobalt-free cell chemistry are available for order at their “SVOLT Battery Day”. The Chinese-headquartered manufacturer first announced cobalt-free cells at the International Motor Show (IAA) in September 2019.

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Why are NMX batteries good news?

Svolt NMX Battery Cells

Usually, most high nickel battery cells (NCM/NCA) Lithium-ion batteries are stabilized with Cobalt. The elimination of cobalt is advantageous in several ways: firstly, they make the batteries less expensive. Cobalt is compared to other battery minerals costly, which is one reason many battery manufacturers seek to reduce the share of cobalt or eliminate it completely. Secondly, cobalt is a controversial cathode element, as it is mostly concentrated and processed in the Republic of Congo under extremely severe conditions.

Svolt expects that the elimination of Cobalt leads to a price reduction of around 5 percent compared to other classic high-nickel battery cells. Furthermore, the company states that at the same time the energy density decreases by 5 percent also compared to the state-of-the-art NCM battery cells. With every dollar we can decrease the cost per kWh of battery, we get closer to a massive uptake of electric vehicles.

Svolt plans to start with the series production of NMX cells in June 2021 at the plant in Jintan, China. The company is currently planning a new battery manufacturing plant in Saarland, Germany. They also plan to manufacture the new batteries there by end of 2023.

More details on the SVOLT NMX battery cells

The NMX battery cells consist of 75% nickel and 25% manganese. The stabilization is achieved through a special doping and coating process. Svolt states that their cells have higher thermal stability and overall safety compared to NCM cells. For the cathode material, the company is using a single crystal with an ultra-thin surface coating (also called “nano-coating”).

SVOLT NMX Battery: Sizes and Advantages

Svolt will introduce two sizes of the battery initially:

  • 115 Ah version with 245 Wh/kg: The cell voltage is 3.74V, and the capacity 430 Wh, with an effective usable capacity of 396 Wh. One of Svolts objectives was to align on standardized celll sizes. The 115 Ah version of the NMX cell will be in an MEB format (33.4 x 220 x 102.5 millimeters)
  • 226 Ah cell variant with 240 Wh/kg: This cell version features Svolt’s proprietary L6 cell format (21.5 x 574 x 118 millimeters). L cells are long battery cells in a thin prismatic design with laterally positioned electrodes and vent valves

The company is planning to expand the product lineup, with currently not more information given.

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Source: Svolt official website

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