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Toshiba launches 20Ah-HP SCiB rechargeable Li-ion battery; high energy and high power

Toshiba Corporation expanded its SCiB product offering with the launch of a 20Ah-HP rechargeable lithium-ion battery cell that delivers high energy and high power at the same time.

The market wants batteries that deliver both high-energy and high-power characteristics, but until now this has required a trade-off for rechargeable lithium-ion batteries. In an EV, for example, a high-energy battery allows the vehicle to drive further on a single charge—but it lowers power input and output and extends charge times. Toshiba drew on its knowhow in current high-energy and high-power products to develop a new cell that combines the advantages of both.

The new cell is suited for heavy-load applications where high power input and output are essential, and for situations where battery cells must suppress heat and operate continuously, such as rapid charging of commercial vehicles, regenerative power systems for rolling stock, and industrial equipment.


The cell is the same size as Toshiba’s current 20Ah product, allowing current customers to easily upgrade to the improved input and output power with the same module pack. The cell is now available to order worldwide.

Product features include:

  • Excellent heat suppression. Compared to Toshiba’s current 20Ah cell, the new 20Ah-HP cell delivers 1.7x higher input and 1.6x higher output, realized by an approximately 40% reduction of resistance in the cell. This improvement efficiently suppresses heat generation when a large current is applied, allowing design of a simpler cooling system. For example, depending on the customer's system, water cooling can be simplified to forced air cooling, and forced air cooling simplified to natural cooling. The lowered resistance also reduces overvoltage, allowing the cell to function in a wider range of state-of-charge (SOC).

  • Long life. The new 20Ah-HP cell achieves a longer life than the current 20Ah cell by suppressing heat during continuous charging and discharging, due to its lower internal resistance. Under the test conditions shown in the figure below, the cell maintained almost 100% capacity after 8,000 charge/discharge cycles, while the capacity of the current 20Ah cell decreased by approximately 10%.


    Comparison of capacity falloff of 20Ah and 20Ah-HP products. (Toshiba testing)

  • Compatibility. The new 20Ah-HP cell delivers improved input and output power but maintains the same size as the current 20Ah cell, allowing current customers to easily upgrade to the improved performance with the same module pack.

Toshiba expects to see the new cell deployed in automobiles, industrial equipment, and storage battery systems. Some examples include drive power supply and emergency power supply for railways, regenerative power supply for harbor cranes, electric ferries, hybrid buses, trucks, hybrid electric vehicles (HEVs) and plug-in HEVs (PHEVs), alternatives to lead-acid batteries and storage battery systems.

Product specifications

Product name 20Ah-HP Cell
Rated capacity 20Ah
Nominal voltage 2.3V
Input power 1900W*
SOC 50%, 10sec, 25˚C)
Output power 1900W*
(SOC 50%, 10sec, 25˚C)
Energy density (volume) 176Wh/L
Energy density (mass) 84Wh/kg
Dimensions W116 × D22 × H106 mm
Weight Approx. 545g
* Calculated value with internal resistance



84 Wh/Kg isn't great, so as they say, this would be more suitable for a HEV than an EV.
Could work well for stationary storage (as they say) where weight and volume is not such a big deal. 8000 cycles with no degradation would be sweet for solar power or just buffering a grid for at least 22 years.


Buses and trucks


A Lithium-ion cell and as mahonj mentioned with a rather poor energy density. With solid state cells (SSCs) beginning to emerge on the market, Toschiba is too late with its emergence. SSCs outdistance conventional Li-ion in volumetric - and mass energy density, price and safety features. The only true advantage that these cells offer is cyclic-ability. I have my doubts that this cell will impact the market.

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