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SK On localizes crucial component determining performance of battery management system

By Lim Chang-won Posted : April 4, 2022, 18:42 Updated : April 4, 2022, 18:42

[Courtesy of SK On]

SEOUL -- SK On, the battery-making unit of South Korea's third-largest conglomerate SK Group, has localized a crucial battery cell component that determines the performance of battery management systems by identifying voltage and temperature information of battery cells. 

With the development of a battery monitoring integrated circuit (BMIC) through joint research with Autosilicon, a domestic developer of semiconductors for batteries, SK On said it will be able to stably procure a key component that has been entirely dependent on foreign products. The new product will be supplied exclusively to SK On for a certain period of time.
BMIC finds a battery cell that operates abnormally and helps the battery management system control it. It accounts for about 30 percent of the total battery management system. Each electric vehicle is equipped with more than 10 BMICs. SK On and Autosilicon have applied a high-speed communication protocol to transmit information up to twice as fast as existing products while reducing parts in half. 

Compared to conventional products, the error range of voltage measurement can be reduced by half, SK On said, adding that It is designed to continuously check the status of battery cells even in an emergency where some functions are not operating due to unexpected reasons.

The new product has acquired ASIL-D, the highest international certification related to automobile functional safety. "We will further increase battery safety through constant technological innovation," SK On's battery research institute head Lee Jang-won said in a statement on April 4. "Through this, we will strengthen our position as the world's best battery company."
BMIC increases battery stability and efficiency in charging and discharging by identifying voltage and temperature information of battery cells mounted in an electric vehicle or an energy storage system. 

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