Xalt Energy releases new Ultra High Energy battery cell

Xalt Energy releases new Ultra High Energy battery cell
XALT 65 Ah Ultra High Energy (UHE) Lithium Ion Cell specs
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Once XALT Energy (formerly Dow Kokam) was one of the battery tech leaders. This cell maker had the best – yet expensive – battery cells. For this reason Xalt Energy battery cells power Formula E electric race cars since the beginning.


Curiously, this cell maker never had much luck in the mass market, especially since its most promising client, the French electric carmaker LUMENEO filed for bankruptcy in November 2013.



Anyway, the new 65 Ah Ultra High Energy battery cell from Xalt shows us that this company is no longer developing cutting-edge technology, as you can see in the energy density figures below.


Gravimetric energy density: 223 Wh/kg

Volumetric energy density: 420 Wh/L


With LG Chem and SK Innovation about to introduce NCM 811 battery cells with an energy density around 620 Wh/L, introducing 420 Wh/L battery cells now seems laughable for a company that was once a battery tech leader.


First it was A123 Systems, now it’s Xalt Energy being left behind, this was unthinkable years ago, I’m getting old…



More info:



Pedro Lima

My interest in electric transportation is mostly political. I’m tired of coups and wars for oil. My expectation is that the adoption of electric transportation will be a factor for peace and democracy all over the world.
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3 years ago

Tiene usted razΓ³n Pedro lima, yo tambiΓ©n hace dΓ­as di con esta nueva celda de esta empresa y tambiΓ©n me dije lo mismo unas cifras bastante bajas para la epoca en que estamos…..Si se miran los datos tecnicos de la celda sin ser malos para nada son de vanguardia “bajo mi humilde opiniΓ³n”. La unica celda que realmente me emociona hasta cierto punto es la de Solid Energy pero ojo las cifras de carga y descarga y nΒ° de ciclos sΓ³n criticos…….Tal vez se llegue a comercializar algΓΊn dΓ­a esa celda de Li-S de laboratorio con 942wh/kg anunciada hace unos dΓ­as………pero me temo que de ser ciertos los datos publicados hay muchos intereses ocultos que haran lo imposible para que desaparezca en un cajon oscuro.

Ralf K.
Ralf K.
3 years ago

Energy density is not the only property that is of relevance, but there is also:
* cycle life
* safety
* price – amount of cobalt
* availability of resources – China still makes most of its cars from LiFePO4 cells

For example, Tesla itself uses NCA in Model S/X vs. NMC in Model 3.

The 18650 cells in S/X have a higher energy density and better power density, but the NMC cells in 21700 have a slightly lower energy density, but a higher cycle life and lower price.

I think with the new cell, XALT wants to have a better offer for cost/benefit-aware customers in the mass market.
You shoud. at least incude price per kWh in yout analysis efforts.

Pedro Lima
3 years ago
Reply to  Ralf K.

Xalt (Dow Kokam) cells were never affordable, quite the contrary, they’ve always been very expensive, similar to the Toshiba SCiB. That’s why they are only used in Formula E electric race cars, not in mass market. They do offer great cyclebility and safety.

While it’s true that the NCA 18650 cells are more energy dense, the less energy dense but safer NCM 21700 cells allow to build a more energy dense battery pack. The NCM cells require less safety mechanisms, such as firewalls (metal separators) and a very hard and heavy case to prevent fire spread in case of puncture. Furthermore the TMS can also be simpler, lighter and smaller.

The best thing we’ll have in the near future are the NCM 811 pouch cells made by LG Chem and SK innovation. Great energy density and very cheap. They do require a good TMS.