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Panasonic Energy Raises Maximum Temperature of Its All-Solid-State Battery from 125°C to 150°C, Creates Smaller Prismatic Cell, and Prepares Samples for October to December 2026, Targeting Sensors and Machinery.
Panasonic Energy has advanced its solid-state battery to operate at temperatures up to 150°C, while also creating a new small prismatic design to facilitate installation in industrial equipment and automotive sensors.
This new development was revealed by the company’s Chief Technology Officer, Shoichiro Watanabe, during an industry conference in Japan. Until now, the all-solid-state batteries being developed by Panasonic operated with a limit of approximately 125°C. The new design expands this range by 25°C and prepares the technology for environments where high heat reduces the lifespan of conventional batteries.
The advancement comes with another significant change: in addition to the coin-shaped cells already tested by the company, Panasonic has developed a small prismatic cell. The rectangular design allows for better fitting within products and systems where internal space needs to be utilized more freely.
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Samples Set to Be Released Between October and December 2026
Panasonic plans to begin shipping samples between October and December 2026. This phase will put the battery in the hands of customers and partners for testing under real conditions prior to larger-scale production.
The initial focus is on industrial machinery and vehicle sensors, two markets where high temperatures and maintenance challenges make a heat-resistant battery especially valuable.
In factories, for example, motors and robots work at a high pace and can raise the internal temperature of sensors and controllers. In vehicles, systems installed near wheels, engines, or components exposed to heat face similar conditions. Panasonic also cites applications related to medical equipment sterilization, where high temperatures are a normal part of the operating process.
The commercial goal is to start in niches where thermal resistance provides a clear benefit. Panasonic has been advocating this strategy: launching all-solid-state batteries first in challenging applications for liquid systems, rather than trying to immediately enter massive volume markets like that of electric vehicles.
Prismatic Format Aims to Solve a Practical Integration Challenge
The new prismatic format addresses a simple engineering limitation. Round or coin-shaped cells may be efficient for certain functions but limit the internal arrangement of compact sensors and equipment. A small rectangular cell can be positioned more flexibly alongside plates, motors, electronic modules, and other components.
According to Watanabe, this change could facilitate the final design of the products that will use the battery. The company intends to offer different shapes based on application needs while continuing tests with coin-type cells.
All-solid-state technology replaces the liquid electrolyte with a solid material. This type of construction can enhance stability at high temperatures and reduce limitations seen in conventional batteries when operating in very hot environments.
Panasonic emphasizes that development relies on precisely controlling the contact between electrodes and the solid electrolyte. In a liquid battery, the electrolyte spreads and adheres to the surface of the electrode. In a solid battery, any loss of contact can hinder ion flow and reduce performance.
Mass production is planned for one to two years after sample deliveries
If customer testing progresses as expected, Panasonic aims to begin mass production one to two years after the start of sample shipments. This timeframe will be used to assess performance, product integration, and stability under various usage conditions.
The company also recently strengthened its research infrastructure in Japan with the Energy Innovation Square in Osaka. This center integrates material development, cell design, prototyping, and analysis, bringing together stages that were previously distributed among different facilities.
This concentration of engineering helps to reduce the time between laboratory research and production. Panasonic wants to expedite the transition of new chemistries and cell formats to lines capable of producing samples and, later, commercial volumes.
In addition to small solid batteries, Watanabe stated that the company also aims to accelerate the development of cylindrical batteries for humanoid robots. The cylindrical shape can better fit into arms, joints, and curved structures, where available space is limited.
The new battery rated for 150°C indicates that the race for solid-state batteries is already advancing in industrial applications. Panasonic is aiming to penetrate markets first where heat, maintenance, and internal space create significant challenges.
If the samples confirm performance in sensors, machines, and sterilization environments, the technology could hit the market for industrial applications before making its way into passenger vehicles. Share this article and leave your thoughts in the comments on which use of this battery seems most promising.
