SLYY218 December   2022 BQ79731-Q1

 

  1.   At a glance
  2.   Authors
  3.   3
  4.   The working principle of a BMS and industry trends
  5.   New battery chemistries
  6.   Wireless BMS
  7.   Advanced estimations of battery capacity and battery health
  8.   A detailed look at the cell supervisor unit (CSU)
  9.   Traditional vs. intelligent battery junction box (BJB)
  10.   A detailed look at the BJB
  11.   A detailed look at the battery control unit (BCU)
  12.   Creating a complete battery test environment ecosystem
  13.   Conclusion
  14.   Additional resource

A detailed look at the battery control unit (BCU)

A BCU consists of a communication chip and an MCU. The communication chip is the interface between the MCU and the CSU and BJB, translating signals from the daisy chain of the CSU and the BJB into a decoded bitstream to send to the MCU. The MCU polls all of the information measured by the CSU and BJB, calculates the battery status, and responds to faults or diagnostics from the CSU and BJB. Figure 7 shows a typical BCU block diagram.

GUID-20221206-SS0I-7KR4-VFCM-RKCP9LJ0KG8G-low.png Figure 7 Typical BCU block diagram.