Fujitsu had 33 patents in batteries during Q4 2023. Fujitsu Ltd filed patents in Q4 2023 related to alkaline secondary batteries with high discharge capacity in low temperatures, battery packaging using paper board, power storage control apparatus for emergency power supply situations, solid-state batteries with a protective coating film, and alkaline batteries with specific compositions for improved performance. GlobalData’s report on Fujitsu gives a 360-degreee view of the company including its patenting strategy. Buy the report here.
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Fujitsu grant share with batteries as a theme is 39% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.
Recent Patents
Application: Positive electrode for alkaline secondary battery and alkaline secondary battery having the same (Patent ID: US20230411622A1)
The patent filed by Fujitsu Ltd. pertains to a positive electrode for an alkaline secondary battery that exhibits high discharge capacity in low-temperature environments. The positive electrode includes a positive electrode active material consisting of 100 parts by mass of nickel hydroxide and an additive containing yttrium oxide, with the nickel hydroxide specifically comprising an a-phase single phase. The presence of yttrium oxide in the additive is crucial for enhancing the performance of the positive electrode, with the optimal range being between 0.3 to 5 parts by mass.
Additionally, the positive electrode may also contain other compounds such as ytterbium, niobium, and titanium compounds in the additive. Furthermore, the positive electrode can have electroconductive layers on the surfaces of nickel hydroxide particles, which include cobalt compound, as well as an electroconductive material. The patent also extends to the application of this positive electrode in an alkaline secondary battery, where it is paired with a negative electrode comprising a hydrogen storage alloy. The combination of the positive electrode with nickel hydroxide and yttrium oxide, along with the specific a-phase single phase structure, contributes to the overall efficiency and performance of the battery, especially in challenging low-temperature conditions.
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