Kokam intros advanced Li-ion battery solution for electric bus, tram and other EVs

Kokam introduced the XPAND battery pack, delivering a battery solution for electric bus, tram, truck, ground support equipment (GSE), military, marine, special-purpose and other commercial and industrial electric vehicle (EV) applications. The battery pack will be offered in two versions – XMP71P, a 7.1 kWh version, and XMP114E, a 11.4 kWh version. Both versions are scalable, able to support EV applications from 7.1 kWh up to 1.5 MWh of capacity, in a wide variety of voltages.


The battery pack is the result of four years of R&D and product development efforts that meet or exceed almost all existing standards for EV battery safety. For example, the battery cells’ ceramic separator and other battery pack thermal containment technologies prevent thermal runaway propagation. These and other advanced battery technologies enabled the XPAND battery pack to secure an IP67 rating, confirming that it is fully protected from dust and can be submerged in 1 meter of water for up to 30 minutes. In addition, the XPAND battery pack has been developed according to ISO 12405, ECE R100, J2929, and ISO 26262 standards and is UN38.3 certified.


The XPAND pack also has an advanced liquid cooling system that offers direct cooling to the battery cells’ face, maximizing volumetric efficiency by reducing the mass of the system by up to 75% compared to air-cooled systems. The battery pack achieves an energy density of up to 150 Wh/kg.


The XMP71P battery pack’s 40 Ah Lithium Nickel Manganese Cobalt (NMC) oxide cells have a lifespan over 6,000 cycles. It provides a modular plug-and-play design, with all external connections on the front panel, makes it easy to engineer the battery into a wide variety of EV applications and service the battery pack in the field. XPAND’s BMS features diagnostics, battery state estimate and a flexible system architecture, providing accurate state of charge and state of health data. The battery system has been tested to meet the EMC requirements of international marine and transportation customers in North America, Europe, and Asia.


The battery pack is manufactured in the United States in a fully automated, 700 MWh cell manufacturing and pack assembly facility. Kokam: http://kokam.com/

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