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STMicroelectronics EVAL-L9963E-NDS BMS IC Evaluation Board

STMicroelectronics EVAL-L9963E-NDS BMS IC Evaluation Board is a hardware tool for L9963E for use in Li-ION battery management applications. The board is intended to be used as a single node in a distributed BMS. EVAL-L9963E-NDS is needed when the total number of battery cells to be managed exceeds 14. The number of nodes to be stacked depends on the total battery voltage. Additional nodes can be added via additional EVAL-L9963E-NDS. A maximum of 31 total nodes beyond the base node EVAL-L9963E-MCU can be stacked. It has to be used in conjunction with EVAL-L9963E-MCU as the second stage or stacked with additional EVAL-L9963E-NDS.

STMicroelectronics EVAL-L9963E-NDS allows the user to manage up to 14 channels for cell voltage sensing, one channel for current sensing, and up to 4 analog input for temperature sensing (plus an additional onboard NTC to sense PCB temperature). The board provides additional protection for a hotplug. EVAL-L9963E-NDS is not intended to be used as a standalone evaluation board but with EVAL-L9963E-MCU.

Features

  • Single node L9963E board for distributed multi-cell BMS
  • To be used with EVAL-L9963E-MCU or EVAL-L9963E as the second stage or stacked with additional EVAL-L9963E-NDS
  • Measures from 4 to 14 cells in series, with 0 us desynchronization delay between samples. Supports also busbar connection without altering cell results
  • Coulomb counter supporting pack overcurrent detection in both ignition on and off states
  • Fully synchronized current and voltage samples
  • 16-bit voltage measurement
  • Communication between nodes through a 2.66Mbps isolated serial communication with regenerative buffer, supporting dual access ring
  • Transformer based isolation
  • Up to 4 analog inputs for NTC sensing, plus PCB temperature sensing
  • Hotplug protection circuit

Required Equipment

  • Power supply
    • At least three output 0 – 30V (if possible 60V)
    • One output to power L9963E (0:60V)
    • One output to simulate cells common-mode voltage (0:60V)
    • One output to simulate cell voltage (0:5V)
  • EVAL-L9963E-MCU as the first stage of a distributed BMS system

Block Diagram

Block Diagram - STMicroelectronics EVAL-L9963E-NDS BMS IC Evaluation Board

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STMicroelectronics EVAL-L9963E-NDS BMS IC Evaluation Board