PRIME PLANET ENERGY & SOLUTIONS, INC. patent applications published on November 30th, 2023

Summary of the patent applications from PRIME PLANET ENERGY & SOLUTIONS, INC. on November 30th, 2023

PRIME PLANET ENERGY & SOLUTIONS, INC. has recently filed several patents related to negative electrode materials, non-aqueous electrolyte secondary batteries, and the production methods for these batteries.

The first patent application describes a negative electrode active material made of artificial graphite particles with multiple internal voids. These particles have a porosity ranging from 0.7% to 15%, and their circularities are determined under an electron microscope. The average circularity of the internal voids is between 0.1 and 0.6. This material aims to prevent the expansion of the negative electrode.

The second patent application focuses on a negative electrode for a non-aqueous electrolyte secondary battery. The negative electrode includes a current collector and a negative electrode active material layer containing graphite particles and Si-containing particles. The binder used in the active material layer includes carboxymethyl cellulose (CMC), poly acrylic acid (PAA), and styrene butadiene rubber (SBR). The negative electrode has specific properties such as a spring constant in the thickness direction between 70 kN/mm and 400 kN/mm, and a yield loop height on a stiffness test equal to or less than 13 mm.

The third patent application describes a method of producing a slurry for a negative electrode composite material used in non-aqueous electrolyte secondary batteries. The method involves two steps: obtaining a mixed-kneaded body and using it to obtain the slurry. The solid content of the slurry is defined by the value "a" and ranges between (a-15)% and (a-10)%.

The fourth patent application focuses on a negative electrode for a non-aqueous electrolyte secondary battery. The negative electrode includes a current collector and a negative electrode active material layer containing graphite particles and Si-containing particles. The graphite particles have specific characteristics such as an average 10% yield strength of 12 MPa or less, and a BET specific surface area of 0.5 m/g to 3.5 m/g. The negative electrode also has a spring constant in the thickness direction of 200 kN/mm or less, and a 90° peel strength between the current collector and the active material layer of 1.5 N/m or more.

Notable applications:

• Negative electrode active material with multiple internal voids to prevent expansion.
• Non-aqueous electrolyte secondary battery with specific binder and mechanical properties.
• Method of producing a slurry for negative electrode composite material.
• Negative electrode with specific graphite particle characteristics and mechanical properties.
• Method for producing a lithium-ion secondary battery.

Patent applications for PRIME PLANET ENERGY & SOLUTIONS, INC. on November 30th, 2023

PRODUCING METHOD FOR LITHIUM-ION SECONDARY BATTERY (18135524)

Main Inventor

Yoshitomo TAKEBAYASHI

NEGATIVE ELECTRODE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY (18317925)

Main Inventor

Yuki MORIKAWA

METHOD OF PRODUCING NEGATIVE ELECTRODE COMPOSITE MATERIAL SLURRY FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY (18320202)

Main Inventor

Hideki SANO

NEGATIVE ELECTRODE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY (18317927)

Main Inventor

Yurika KOJIMA

NEGATIVE ELECTRODE ACTIVE MATERIAL, SECONDARY BATTERY, AND METHOD FOR PRODUCING ARTIFICIAL GRAPHITE PARTICLES (18139064)

Main Inventor

Shuhei TAKESHITA

NON-AQUEOUS RECHARGEABLE BATTERY, ELECTRODE PLATE FOR NON-AQUEOUS RECHARGEABLE BATTERY, AND METHOD FOR MANUFACTURING NON-AQUEOUS RECHARGEABLE BATTERY (18203032)

Main Inventor

Junya HISHII

SEALED POWER STORAGE DEVICE (18303571)

Main Inventor

Yozo UCHIDA

SEALED STORAGE POWER DEVICE AND METHOD FOR PRODUCING THE SEALED STORAGE POWER DEVICE (18303570)

Main Inventor

Yuki SATO

SEALED BATTERY (18303568)

Main Inventor

Yozo UCHIDA

SEALED BATTERY (18303572)

Main Inventor

Yozo UCHIDA