Sodium-ion battery passes a deep-cold starting test, but is it ready for your car?
Has sodium-ion already replaced the conventional starter battery? No: the partners have reported validation results, with pilot work still ahead.
In a statement released on 14 September, Clarios, Altris and InoBat said they had validated sodium-ion technology for low-voltage applications that need high power. Their intended uses include cars, heavy vehicles and other equipment. They also reported cold-cranking performance validated down to −40°C. That is a company-reported test result, not evidence that a replacement battery is already on sale.
The distinction matters because a starter battery supports a vehicle’s onboard electrical system and delivers a burst of power for starting. The wider industry often discusses 12 V and 48 V systems, but the partners did not state either voltage as a specification of these cells. This announcement concerns neither a traction pack for an electric car nor an improvement in electric driving range at −40°C.
The next stage is pilot-scale learning and preparation for small-series production at InoBat’s Volta facility in Slovakia. The companies have not announced a mass-market sale date. If you own a car or manage a fleet, the practical takeaway is to watch the development of cold-weather low-voltage power, while treating your current starter-battery choice as unchanged. A validated test is an important step, but it is not the same as a product you can fit today.