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Taiwan battery makers boost R&D for electric vehicles

Lithium batteries and fuel cells power the new generation of “green” transport units.
Taiwan manufacturers are stepping up product development work on electric vehicle batteries in anticipation of demand rise. They are concentrating on lithium types and fuel cells, which are the energy-efficient and environment-friendly replacements for traditional lead-acid variants. Efforts center on enhancing performance and safety. Many are also releasing more high-density models that meet the space and weight requirements of EVs. Units, for instance, must be lighter than 10kg.

In the lithium category, suppliers are improving the charging speed. Masterhold offers 16Ah LiFePO₄ models that can be charged to 80 percent capacity within 10min. Better battery management system is also on makers’ agenda. This aims to raise the product’s efficiency and safety. Large EV battery manufacturers, including E-One Moli and Lanyang, design their own BMS.

Based on subtypes, Taiwan makers are focusing on LiFePO₄ for its higher charging current, lower charging time, longer life span and lighter weight compared with mainstream Li-ion. The former also has nonexplosive properties. Unlike lead-acid units, which powered earlier EVs and require at least 10hr to charge, the lithium-based chemistry needs only 1hr. It also surpasses the former in terms of charging cycles, which reach 2,000 as opposed to 200 to 400 for the older version.

Makers are tapping better materials and exploring design options to raise safety levels further. Amita and E-One Moli, have introduced cells that employ STOBA cathode to prevent internal short circuit. Companies are also looking to utilize bidirectional converters for charging and discharging from various DC power sources. They are considering power management controllers to prolong battery life span as well. Such design enables overvoltage and -heating, undervoltage and short-circuit protection.

Enterprises are developing charging solutions using communication control modules for remote bilateral monitoring management. Delta Electronics produces a wall-mount AC charger that supports smart functions such as RFID, user recognition, and remote upgrade and administration.


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