The Solidion company from Dallas (USA) has developed a patented system that provides fast charging in any climatic conditions. He writes about it Interesting Engineering.
The system uses a heat sink based on graphene. It quickly heats batteries before or during charging, and an integrated cooling system activates during discharge to prevent overheating. According to the company, the technology enables fast charging of the electric car in any weather, especially overcoming the current limitations of batteries in cold climates. Solidion plans to bring it to the market within 2-3 years.
To compete with internal combustion engine cars, rapid charging of an electric car must be independent of the weather and take about the same time as refueling a gasoline car.
Temperature fluctuations in different seasons and geographical areas can make it difficult to quickly charge electric vehicle batteries, as they can react differently.
In general, fast charging at low temperatures is currently not possible with any of the EV batteries available on the market.
According to the company, to meet the urgent need of the electric vehicle market for fast charging in any weather, its technical group has developed and patented a method of fast charging of battery cells or blocks without harming their integrity. This technology allows batteries to operate safely and avoid problems with thermal acceleration.
To do this, the Solidion system uses a graphene-based heat sink, which effectively removes heat from the battery, heating it up before or during charging.
Graphene is extremely effective for this purpose, having a thermal conductivity of 5300 W/mK, far superior to copper (410 W/mK), and being four times lighter.
When the battery is used, for example, to power an electric vehicle, the system switches to cooling mode, drawing heat away from the battery to prevent overheating. The heat sink directs excess heat to the cooling system, providing effective temperature control and protecting battery performance.
The Solidion system automatically switches between heating during charging and cooling during use, providing safe, fast charging across a range of temperatures.
To address the expected graphite shortage of 1,4 million tonnes/year by 2028, Solidion has also developed a cost-effective process to produce anode graphite from sustainable sources, including biomass and recycled materials. The company wants to put the US among the top 10 graphite producers in the world, implementing its plan for sustainable graphite production, with the ultimate goal of becoming a world leader.
Solidion specializes in solid state batteries and high capacity anodes. Its two main product lines are three varieties of solid-state batteries and advanced anode materials designed for increased performance. They include Gen 1 high-silicon lithium-ion cells, Gen 3 lithium-sulfur cells, and Gen 2 anode-less lithium-metal cells. Each battery type uses its own solid electrolyte, which is easily synthesized from a polymer or polymer-inorganic composite.
Solidion batteries can be brought to market quickly as they are compatible with current production capacity
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