Maxell, Ltd. has developed an all-solid-state battery module compatible with a 1/2AA-size (diameter 14.5 mm, height 25.2 mm) lithium thionyl chloride battery (hereinafter ER battery), along with a dedicated charger. The module is available in two versions, one capable of operating at temperatures up to 125°C and the other up to 150°C. All-Solid-State Battery Module Supporting Wireless Charging and dedicated charger (Under development), Left: Module, Center: Internal Module Structure, Right: Dedicated charger. Currently, ER batteries are widely used in industrial equipment backup systems, smart meters, and IoT devices.
However, because ER batteries are non-rechargeable, periodic battery replacement and the disposal of used batteries present ongoing operational challenges. The newly developed module integrates a wireless charging circuit, highly heat-resistant and highly reliable all-solid-state batteries, and a boost circuit into a 1/2AA-size, while delivering the same 3.6 V output voltage as conventional ER batteries. When used in combination with the dedicated charger, it enables wireless charging capability to be added to existing equipment without requiring complex circuit design.
By incorporating rechargeable all-solid-state batteries, the module helps reduce battery replacement work and minimize battery waste. In addition, its wireless charging capability eliminates the need for openings in device housings for battery replacement or charging, making it suitable for equipment that requires a high degree of sealing performance. One potential application of this module is temperature loggers for food used in the sterilization process of retort foods require both heat resistance and a high degree of sealing performance to prevent moisture ingress.
Currently, Maxell is conducting a joint feasibility study with House Foods Corporation on a temperature logger for food process using this module.
Maxell Ltd, formerly Maxell Holdings Ltd, is mainly engaged in the manufacturing and sales of energy, industrial materials and electric appliances and consumer products. The Company mainly operates through three business segments. The Energy segment manufactures and sells secondary batteries, such as coin type lithium secondary batteries, industrial lithium ion batteries and electrodes, and consumer lithium ion batteries, primary batteries such as lithium primary batteries and button batteries, and charger and battery packs. The Industrial Materials segment manufactures and sells optical components, functional materials, electroforming and precision parts, semiconductor-related embedded systems, mold and synthetic resin molded parts, adhesive tapes, radio-frequency identification (RFID) systems and Integrated Circuit (IC) cards, industrial rubber products and others. The Electric Appliance and Consumer segment manufactures and sells projectors, small electric equipments and others.
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