South Korean automaker Hyundai has set its sights on enhancing electric vehicle (EV) performance by filing a patent for a pressurized all-solid-state EV battery system in the United States. The move reflects Hyundai’s commitment to staying ahead in the growing EV market, with a focus on improving battery stability and energy density for more efficient and enduring EVs.
The patent, titled “all-solid-state battery system provided with pressurizing device,” was officially published on December 28, 2023. Hyundai’s innovation involves an all-solid-state battery system that maintains constant pressure in each cell, regardless of charging and discharging rates.
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Traditional lithium-ion batteries utilize a liquid electrolyte to separate the cathode and anode, whereas solid-state batteries employ a solid electrolyte. This distinction ensures stability and sustained performance even if the electrolyte is compromised.
Solid-state batteries are gaining attention as a potential alternative to conventional lithium-ion batteries, promising benefits such as reduced weight, enhanced safety, faster charging capabilities, and improved overall performance. However, challenges related to material cost and sourcing have hindered their widespread adoption.
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Hyundai’s novel all-solid-state battery system aims to address these limitations by implementing a constant pressure approach during charging and discharging cycles. The patent details a configuration where battery cells are housed within a closed, pressurized chamber. Fluid, under isostatic pressure, is used to pressurize the cells, with a dedicated pressurizing device controlling the fluid supply.
To ensure optimal functioning, sensors are incorporated to monitor pressure and temperature within the chamber, complemented by a voltage detector to track individual cell voltages. A dedicated controller is responsible for initiating charging and discharging processes when temperature and pressure fall within predefined ranges. The system also features a temperature-adjusting device to maintain optimal operating temperatures.
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As Hyundai aims to overcome existing challenges associated with solid-state battery technology, the patent signifies a strategic move to advance EV capabilities, aligning with the industry’s ongoing pursuit of more sustainable and efficient energy solutions.
