United Electronics' new generation battery management controller system (BMS8.3) goes into mass production

Recently, after 10 months of technical research, the new generation of battery management controller system BMS8.3 independently developed by United Electronics has been successfully put into mass production.

With the development of new energy vehicles , electric vehicles with long driving range and high safety are the direction pursued by major OEMs. As electric vehicles have increasing requirements for battery pack capacity and safety performance, batteries have also put forward higher requirements for battery management systems: more battery cell detection channels and higher balancing capabilities, as small installation size as possible, etc. In addition, the new national standard for electric vehicles announced in 2020 also requires further improvement of the functions of battery management systems, such as high-precision high-voltage sampling and high-voltage safety protection, and battery pack thermal runaway alarm functions.

In response to new market and customer requirements, United Electronics has launched a new generation of high-performance battery management controller system BMS8.3 (Battery Management System). The system solution includes the main controller BMC8.3 and the slave controller CMC8.3, which is suitable for EV/PHEV battery packs with voltage below 500V.

Product Features

The battery management controller system adopts a master-two-slave structure: 1 master controller and 2 slave controllers, which are connected by daisy chain. The functions of the master controller BMC8.3 include high-voltage sampling, current detection, high-voltage relay control, AC/DC charging, thermal runaway detection, insulation detection, high-voltage interlock, dual backup FOTA, etc.; a single slave controller CMC8.3 can support 64 channels of high-precision battery cell voltage sampling and 24 channels of module temperature sampling, and each channel meets the requirements of 100 mA battery cell balancing current.

The BMS8.3 controller system has the following features:

• Compact size design, the volume is reduced by about 50% compared with the previous generation

• Functional safety design that supports up to ASIL D, using a three-layer functional safety architecture to provide comprehensive safety protection

• Adopting a new generation main chip, reaching 10M flash, which can realize the dual backup FOTA function

•Using the latest generation of high-performance sampling chips, supporting more channels and higher-precision cell voltage sampling

•Support CAN FD communication to meet customers' different CAN electrical architecture requirements

•Support bidirectional daisy chain communication to ensure communication reliability

•High current balancing and offline balancing design provide faster cell capacity balancing

•Supports wake-up function for battery failure in sleep state, which can provide more comprehensive battery protection