2. Get Hardware
The RD-HVBMSCTBUN is a high voltage battery management system (HVBMS) reference design bundle. It has been developed for evaluation and development purposes. It is composed of a hardware kit and several software packages.
2.2 Battery Management Unit
The battery management unit (BMU) is the control part of the battery management system (BMS). The BMU processes the data, makes decisions and commands the system.
The RD-K344BMU is the HVBMS reference design BMU. This BMU kit includes a power supply and three cables to interface with other parts of the HVBMS.
To learn more about the RD-K344BMU, visit the website associated with this reference design.
2.3 Firmware Version
The RD-K344BMU is preflashed with firmware to ease start-up. From firmware version
0.9.1, a sticker has been added on the RD-K344BMU board and packing box to mention
the firmware version included. If the sticker does not mention the version of your board, it
has been preflashed with the firmware version 0.8.0.
- Firmware version 0.8.0 does not include System Basis Chip (SBC) support. The SBC
needs to be set in Debug mode at start-up by pressing the SW1 button. Having the
SBC in the incorrect mode causes the MCU to cyclically reset and the LEDs to blink.
This firmware version is not compatible with the latest version of the HVBMS start-up
interface described in this guide. You can either use the previous version or reprogram
the MCU with the latest .elf file included in the latest HVBMS bring-up example
- Firmware version 0.9.1 and newer includes SBC support. SBC is in Normal mode by
default and works with the HVBMS start-up application. Nevertheless, the SBC should
be placed in Debug mode by pressing the SW1 button at power-on reset in order to
allow reflash of the MCU
2.4 Cell Monitoring Unit
The cell monitoring unit (CMU) is the cell-sensing part of the battery management system. The CMU precisely monitors cell voltages and environmental temperatures to ensure safe battery operation and enables fast cell balancing.
The RD33775ACNTEVB is the HVBMS reference design CMU for electrical transport protocol link (ETPL) based architectures. This CMU kit includes five cables to interface with other parts of the HVBMS.
2.5 Battery Junction Box
The battery junction box (BJB) is the pack-level sensing part of the battery management system. The BJB measures high voltages. This measurement allows monitoring connections of the contactors to the inverter and the charger. The BJB also precisely measures the system’s current and monitors the battery to chassis isolation.
The RD772BJBTPLEVB is the HVBMS reference design BJB for electrical transport protocol link (ETPL) based architectures. This BJB kit includes six cables to interface with other parts of the HVBMS.
2.6 Battery Emulation
The HVBMS reference design kit contains a battery emulation kit which is composed of a BATT-14CEMULATOR and a BATT-14EXTENDER board.