Hitachi had 72 patents in batteries during Q1 2024. Hitachi Ltd filed patents for an all-solid-state battery system with a specific negative electrode discharge utilization rate and a non-aqueous electrolyte secondary battery with a negative electrode mixture layer meeting specific resistance criteria. Additionally, a roll press system with reverse operation bending mechanisms was also patented for correcting deflection in press rolls. GlobalData’s report on Hitachi gives a 360-degree view of the company including its patenting strategy. Buy the report here.

Hitachi grant share with batteries as a theme is 44% in Q1 2024. Grant share is based on the ratio of number of grants to total number of patents.

Recent Patents

Application: All-solid-state battery system (Patent ID: US20240105926A1)

The patent application by Hitachi Ltd. describes an all-solid-state battery system comprising a positive electrode, negative electrode, and solid electrolyte layer. The negative electrode contains lithium titanium oxide, with a specified discharge utilization rate of 134 mAh/g or less. The battery capacity is calculated based on specific charging and discharging conditions, ensuring efficient performance of the battery system.

Additionally, the system includes a charging apparatus and operates with an upper limit voltage of 2.8 V. The positive electrode consists of a lithium-containing composite oxide, specifically lithium cobalt oxide. The solid electrolyte layer is a sulfide-based solid electrolyte, particularly an argyrodite-type sulfide-based solid electrolyte. These specific components and materials contribute to the overall performance and stability of the all-solid-state battery system, as outlined in the patent claims.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.