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Autosilicon unveils 24-Channel Battery Diagnosis IC for EV and ESS battery management systems

February 12, 2024

Autosilicon Inc. has announced the launch of its 24-channel Battery Diagnosis IC (BDIC) for high-capacity battery cells in Electric Vehicles (xEV) and Energy Storage Systems (ESS). This follows the successful release of their 14-channel BDIC last year.

The BDIC from Autosilicon enhances the operating current, measurement accuracy, and volume compared to Electro-Impedance Spectroscopy (EIS) equipment. It replaces multiple devices with a single chip, allowing the measurement of AC impedance in up to 24 battery cells, and can be expanded to battery module and pack.

The xEV and ESS industry has recently seen a rise in claims due to battery defects. Accurate analysis of these defects is often challenging due to the high costs and time-consuming disassembly of battery packs, as well as technical limitations in identifying defect causes. The integration of BDIC into the Battery Management System (BMS) enables online monitoring of battery AC impedance information, allowing continuous tracking of the status of all shipped battery cells and online analysis of accumulated battery data.

BDIC also aids in battery defect analysis, expanding to the examination of specific substances within the battery. With EIS technology, it is possible to accurately detect defective batteries. Additionally, AC impedance measurement in hydrogen fuel cells enables the assessment and diagnosis of the internal condition, supporting cost-effective repairs and replacements of fuel cell battery stacks.

From 2026, certain US states will enforce regulations requiring electric vehicle manufacturers to monitor and ensure the State of Health (SoH) of their batteries. The EU also plans to introduce a battery passport system in 2027 for managing battery information, electrochemical performance, durability, and SoH.

In response to these upcoming regulations, Autosilicon is adopting EIS technology to gather more internal state data from battery cells. The company has also developed an algorithm and software to measure the internal temperature of every individual cell using BDIC, a task that was challenging to achieve with the conventional NTC temperature sensor. The release of BDIC enables online integration to the system, building Cloud BMS, and efficient battery management throughout the entire lifecycle for various purposes.

Autosilicon’s 24-channel BDIC is being promoted to domestic and foreign xEV/ESS customers and battery cell manufacturers. Mass production is scheduled to begin in June 2024.