Maxell, Ltd. is developing a 200mAh cylindrical all-solid-state battery with 25 times the capacity of a ceramic packaged all-solid-state battery (PSB401010H) that uses a sulfide-based solid electrolyte and has been in mass production since June 2023. The PSB23280 cylindrical all-solid-state battery achieves its large capacity due to a newly-developed cylindrical exterior body with high sealability, while retaining long-term reliability and heat resistance equivalent to those of existing products.
Maxell is planning to ship samples from late January 2024. Maxell has been developing and commercializing batteries in line with market needs, including the development of ceramic packaged all-solid-state batteries capable of being surface mounted on boards, and specialized high voltage, high output bipolar all-solid-state batteries, and is supplying these samples at present. The wide temperature range and long-term reliability characteristics of Maxell’s all-solid-state batteries are evaluated as “batteries that can contribute to social issues” by the customers who used the samples.
In addition, there has recently been an increase in the need for larger capacity all-solid-state batteries that can also be applied to main power applications including sensing applications such as infrastructure monitoring. The new cylindrical all-solid-state battery under development is responding to such requirement.
The large capacity of this cylindrical all-solid-state battery was realized by comprehensively reviewing its electrode structure and exterior body. For the electrode structure, a process that enables filling to a higher density was introduced to increase the size of the electrode. For the exterior body, the shape was changed from cubic to cylindrical, and a new cylindrical exterior body that can maintain sealability equivalent to that of a ceramic packaged all-solid-state battery was developed. Large capacity is thereby realized while maintaining the various characteristics of Maxell’s existing all-solid-state batteries, such as long life and heat resistance.
