Toyota Boshoku‘s patented fuel cell stack features power generation cells stacked vertically, each generating power using gas. The design includes a gas manifold and passage for efficient gas flow. The innovative structure enhances fuel cell performance and reliability. GlobalData’s report on Toyota Boshoku gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Toyota Boshoku, Autonomous seating was a key innovation area identified from patents. Toyota Boshoku's grant share as of January 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.

Fuel cell stack with vertical power generation cells

Source: United States Patent and Trademark Office (USPTO). Credit: Toyota Boshoku Corp

The granted patent (Publication Number: US11888202B2) discloses a fuel cell stack design that consists of power generation cells stacked vertically. Each power generation cell includes a membrane electrode assembly, a support frame, and two separators to hold them together. The cells have first and second holes, with the first holes forming a gas manifold for gas flow and the second holes forming a passage adjacent to the gas manifold. The gas supplying passage and the passage are connected at the upper ends, allowing efficient gas distribution within the cells.

Furthermore, the fuel cell stack includes a unique feature of a wall surface above the connection point of the gas manifold and the passage. This wall surface has an inclined surface with varying heights, decreasing from the side corresponding to the gas manifold towards the side corresponding to the passage. Additionally, the inclined surface has a higher hydrophilicity compared to other sections of the wall surface. This design aims to enhance the performance and efficiency of the fuel cell stack by optimizing gas distribution and flow within the cells, ultimately improving power generation capabilities.

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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.