Autosilicon Inc . in January launched a 24-channel battery diagnostic IC specifically designed for high-capacity battery cells in electric vehicles (xEV) and energy storage systems (ESS). A 14-channel BDIC was introduced last year.

Autosilicon's BDIC improves operating current, measurement accuracy and volume compared to devices that use electrochemical impedance spectroscopy (EIS). The company has thus succeeded in replacing several devices with a single chip. The integrated circuit enables the measurement of AC impedance in up to 24 battery cells and can be expanded to include battery modules and packs.

The electric vehicle and energy storage system industry has recently seen a significant increase in claims due to battery failures. However, a precise analysis is difficult due to the high costs and time-consuming dismantling of battery packs as well as the limited technical possibilities for determining the causes of errors.

By integrating the BDIC into the battery management system (BMS), online monitoring of the battery's AC impedance is enabled, allowing continuous tracking of the status of all delivered battery cells and online analysis of the stored battery data. The BDIC also supports the analysis of battery faults by extending the investigation to certain substances in the battery. EIS technology sets new standards for the precise detection of defective batteries. Additionally, AC impedance measurement in hydrogen fuel cells enables internal health testing and diagnosis, making repairs and replacement of fuel cell battery stacks more cost-effective.

Starting in 2026, some US states will implement regulations requiring electric vehicle manufacturers to monitor and ensure the state of health (SoH) of their batteries. The EU plans to introduce a battery passport in 2027 with the aim of managing information about the battery, electrochemical performance, durability and SoH.

That's why Autosilicon is now using EIS technology to collect more data about the internal health of battery cells. The company has also developed an algorithm and software that can measure the internal temperature of each individual cell using BDIC. This was difficult to achieve with the traditional NTC temperature sensor. The market launch of the BDIC enables online integration into the system, the creation of Cloud BMS and efficient battery management across the entire life cycle for a wide range of purposes.

Autosilicon's 24-channel BDIC is currently being promoted to domestic and foreign xEV/ESS industry customers and battery cell manufacturers. The start of mass production is planned for June 2024.

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Source:businesswire.com

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