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If fuel cells are used in future energy vehicles, will aaa battery alkaline technology be eliminated?

Q5: If fuel cells come out, will lithium-ion secondary batteries be needed? What will be the relationship between FCV and EV?

A5: The optimal use is technically different. By using fuel cells in combination with lithium-ion batteries, new applications that have not been possible so far can be created or wasted costs can be avoided. Moreover, many existing fuel cell vehicles (FCV) are equipped with secondary batteries with large capacities, which are actually semi-EV products. Therefore, economic rationality is the most important for promotion. The current foreseeable trend is that it is more suitable to use it with lithium-ion secondary batteries.

FCV is considered to be introduced first from commercial vehicles (buses, long-distance trucks, forklifts, drones, etc.) where cruising range and availability are important. If autonomous driving becomes popular in the future, it is very likely that urban cars will adopt FCV.

Q6: There is a saying that although Japan has advanced technology, it deployed too early and was isolated?

A6: Although Japanese manufacturers maintain their technological advantage, overseas companies are also catching up. In terms of market development and development of hydrogen supply infrastructure, it is better to say that overseas progress is now faster. Amazon and Walmart in the United States have imported a total of about 20,000 fuel cell (FC) forklifts. Japan’s early layout was very early, but they fell asleep in the middle, and when they suddenly woke up, they were a bit like an overslept rabbit.

Will maintain complementary relationship with LIB battery

We compared the characteristics of two battery technologies, LIB and FC, for the automotive market. FC batteries have obvious advantages in: (1) high energy density, (2) short fuel (charging) time, and (3) low cost when increasing capacity.

FC batteries and LIB batteries are not competing but complementary.

Comparison of FC systems and lithium-ion secondary batteries (LIB). In terms of energy density, even if hydrogen tanks, etc. are taken into account, the FC system still wins. On the other hand, FC has low load following performance and power utilization efficiency. While increased capacity enables low cost, high power output is more expensive. There are only about 100 hydrogen refueling stations used by FC in Japan, but there are about 7,000 fast chargers. If household AC power is included, the number of charging facilities for electric vehicles is significantly different from that of FC.

(A) Comparison of the advantages and disadvantages of EV and FCV during long-distance driving

(B) Distinguishing the uses of EV and FCV

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