Patent for Advanced Battery Design Published

Strategic Insights -

A patent for an innovative battery design has been published, boasting a significant improvement in reducing foreign objects mixed into an electrode body without compromising the battery's capacity. The design, developed by Japanese inventor Ryoichi Wakimoto, features a novel current collector and several sealing plate-side covering members that mitigate the risk of internal short circuits caused by metal foreign objects.

Key Takeaways:

  • The patent, filed on June 23, 2020, and published on September 30, 2025, describes a battery design that incorporates a current collector with a first and second area, allowing for improved electrical connectivity and reduced risk of internal short circuits.
  • The design features several sealing plate-side covering members that cover the welding points between the electrode tabs and the current collectors, providing an additional layer of protection against foreign objects.
  • The internal insulation member, fixed to the sealing plate, includes a flat area on the surface facing the electrode body, further enhancing the design's ability to prevent internal short circuits.
  • The novel battery design is intended for use in various applications, including electric vehicles, hybrid electric vehicles, and plug-in hybrid electric vehicles.
  • The publication of this patent marks an important step towards the commercialization of advanced battery technologies that prioritize safety and reliability.

Statistics:

  • The patent was filed on June 23, 2020, and published on September 30, 2025.
  • The design features a current collector with a first and second area, which allows for improved electrical connectivity.
  • The sealing plate-side covering members cover an area corresponding to the back of the welding area of the electrode tabs on the surface of the current collectors facing the sealing plate.
  • The internal insulation member includes a flat area on the surface facing the electrode body, which enhances the design's ability to prevent internal short circuits.
  • The patent is titled "Battery" and was assigned patent number 12431564 in the United States.

Sources:

  • U.S. Patent No. 12431564 (Wakimoto, Ryoichi. Battery. Filed June 23, 2020, and published September 30, 2025.)