STM32 Nucleo-F746xx application with a library of supported commands for the Secondary BMS: Energus TinyBMS s516-150A
STM32 Nucleo-F746ZG <----UART----> Energus TinyBMS s516-150A
or
STM32 Nucleo-F746ZG <-CAN-UART-> Energus TinyBMS s516-150A
<CC/CV Charger>
UART
UART continuous communication in DMA (Direct Memory Access) mode
Baudrate: 115200 bit/s, 8 data bits, 1 stop bit, no parity, no flow control
CAN
bxCAN (Basic Extended Controller Area Network) peripheral driver for STM32
CAN2.0A (11-bit standard ID)
TinyBMS Default Node ID: 0x01 -> StdID_request: 0x201, StdID_response: 0x241
CAN bitrate: 500000bit/s
Secondary Pack Characteristics
24V 50Ah (7S 20P) -- Specced for (t >= 2) hours runtime @ continuous load.
Nominal Capacity: 50Ah / 180Wh
Peak Discharge Current: 15C max (750A)
Average Discharge Current: 5C max (250A)
Individual Cell
Samsung INR18650-25R - Lithium Ion "18650" cylindrical cell - 2500mAh
Dimensions
Cell Height: 64.85 +/- 0.15mm
Cell Diameter: 18.33 +/- 0.07mm
Mass
Cell: 45.0g per cell
Module: 1.05kg per module
Pack: 7.35kg ~= 16.2lb
Electrical Ratings
I_cell_rating = 20A_ctns, I_pack_rating = 400A_ctns
V_cell_absmin = 2.5V, V_cell_nominal = 3.6V, V_cell_absmax = 4.2V
V_pack_absmin = 17.5V, V_pack_nominal = 25.2V, V_pack_absmax = 29.4V
Module Construction
Each 'super-cell' is a '10x2' (10 by 2) module which is comprised of 20 '18650' cells connected in parallel, but arranged in 2 rows of 10 cells.
Pack Configuration
The secondary battery pack is 7 of these 'super-cells' connected in series.
Charging Characteristics
Standard Charge (cell): CC/CV, 1.25A, 4.20 +/- 0.05V, 125mA cut-off -> 180min
Rapid Charge (cell): CC/CV, 4.00A, 4.20 +/- 0.05V, 100mA cut-off -> 60min (at 25°C)
Standard Charge (pack): CC/CV, 25.00A, 29.4 +/- 0.35V, 2.5A cut-off -> 180min
Rapid Charge (pack): CC/CV, 80.00A, 29.4 +/- 0.35V, 2.0A cut-off -> 60min (at 25°C)
Operating Temperature: 0 to 50°C
Discharging Characteristics
Nominal Discharge (cell): 0.2C (500mA), 2.5V cut-off
Max Continuous Discharge (cell): 8C (20A) (at 25°C), 60% at 250 cycles
Nominal Discharge (pack): 0.2C, 2.5V cut-off
Max Continuous Discharge (pack): 20A (at 25°C), 60% at 250 cycles
Operating Temperature: -20 to 75°C
| Settings Register | Value |
|---|---|
| Fully Charged Voltage: | 4000mV |
| Fully Discharged Voltage: | 3000mV |
| Early Balancing Threshold: | 3200mV |
| Charge Finished Current: | 1000mA |
| Battery Capacity: | 5000mAh |
| Number of Series Cells: | 7 |
| Allowed Disbalance: | 15mV |
| Pulses Per Unit: | 1 |
| Distance Unit Name: | km |
| Over-Voltage Cutoff: | 4200mV |
| Under-Voltage Cutoff: | 2900mV |
| Discharge Over-Current Cutoff: | 60A |
| Charge Over-Current Cutoff: | 30A |
| Over-Temp Cutoff: | 60°C |
| Low Temperature Charger Cutoff: | 1°C |
| Charger Type: | CAN |
| Load Switch Type: | FET |
| Automatic Recovery: | 5s |
| Charger Switch Type: | Charge FET |
| Ignition: | Disabled |
| Charger Detection: | Internal |
| Speed Sensor Input: | Disabled |
| Precharge Pin: | Disabled |
| Precharge Duration: | 100ms |
| Temperature Sensor Type: | Dual 10K NTC |
| BMS Operation Mode: | Dual Port |
| Single Port Switch Type: | N/A |
| Broadcast Time: | Disabled |
| Protocol: | CAV3 |
Low Current Application (150A_peak discharging, 30A_peak charging)
- Connected Devices
- Energus TinyBMS s516-150A (?W)
- Orion BMS Jr (?W)
- Stepper Motors for Braking System (?W)
- Bender ISOMETER IR155-3204 (?W)
- STM32 Nucleo-F746ZG (?W)
- Power Converters (?W)
- Miscellaneous Sensors and Peripherals (?W)
1: UART Command Test
2: CAN Command Test
3: Monitor Charging (UART)
4: Monitor Discharging (UART)
5: Monitor Charging (CAN)
6: Monitor Discharging (CAN)
7: Quit
-
UART Command Testing:
- 1.1.1 TinyBMS_UART_ACK
- 1.1.2 TinyBMS_UART_ReadRegBlock
- 1.1.3 TinyBMS_UART_ReadRegIndividual
- 1.1.4 TinyBMS_UART_WriteRegBlock
- 1.1.5 TinyBMS_UART_WriteRegIndividual
- 1.1.6 TinyBMS_UART_ReadRegBlockMODBUS
- 1.1.7 TinyBMS_UART_WriteRegBlockMODBUS
- 1.1.8 TinyBMS_UART_ResetClearEventsStatistics
- 1.1.9 TinyBMS_UART_ReadNewestEvents
- 1.1.10 TinyBMS_UART_ReadAllEvents
- 1.1.11 TinyBMS_UART_ReadBatteryPackVoltage
- 1.1.12 TinyBMS_UART_ReadBatteryPackCurrent
- 1.1.13 TinyBMS_UART_ReadBatteryPackMaxCellVoltage
- 1.1.14 TinyBMS_UART_ReadBatteryPackMinCellVoltage
- 1.1.15 TinyBMS_UART_ReadOnlineStatus
- 1.1.16 TinyBMS_UART_ReadLifetimeCounter
- 1.1.17 TinyBMS_UART_ReadEstimatedSOCValue
- 1.1.18 TinyBMS_UART_ReadDeviceTemperatures
- 1.1.19 TinyBMS_UART_ReadBatteryPackCellVoltages
- 1.1.20 TinyBMS_UART_ReadSettingsValues
- 1.1.21 TinyBMS_UART_ReadVersion
- 1.1.22 TinyBMS_UART_ReadVersionExtended
- 1.1.23 TinyBMS_UART_ReadCalcSpeedDistanceLeftEstTimeLeft
-
CAN Command Testing:
- 2.1.1 TinyBMS_CAN_ResetClearEventsStatistics
- 2.1.2 TinyBMS_CAN_ReadRegBlock
- 2.1.3 TinyBMS_CAN_WriteRegBlock
- 2.1.4 TinyBMS_CAN_ReadNewestEvents
- 2.1.5 TinyBMS_CAN_ReadAllEvents
- 2.1.6 TinyBMS_CAN_ReadBatteryPackVoltage
- 2.1.7 TinyBMS_CAN_ReadBatteryPackCurrent
- 2.1.8 TinyBMS_CAN_ReadBatteryPackMaxCellVoltage
- 2.1.9 TinyBMS_CAN_ReadBatteryPackMinCellVoltage
- 2.1.10 TinyBMS_CAN_ReadOnlineStatus
- 2.1.11 TinyBMS_CAN_ReadLifetimeCounter
- 2.1.12 TinyBMS_CAN_ReadEstimatedSOCValue
- 2.1.13 TinyBMS_CAN_ReadDeviceTemperatures
- 2.1.14 TinyBMS_CAN_ReadBatteryPackCellVoltages
- 2.1.15 TinyBMS_CAN_ReadSettingsValues
- 2.1.16 TinyBMS_CAN_ReadVersion
- 2.1.17 TinyBMS_CAN_ReadCalcSpeedDistanceLeftEstTimeLeft
- 2.1.18 TinyBMS_CAN_ReadNodeID
- 2.1.19 TinyBMS_CAN_WriteNodeID
**SHL_Pod_SecondaryBMS**
|
└───Includes
└───Core
| └───Inc
| | | - it.h
| | | - main.h
| | | - stm32f7xx_hal_conf.h
| | | - TinyBMS.h
| |
| └───Src
| | | - it.c
| | | - main.c
| | | - msp.c
| | | - syscalls.c
| | | - sysmem.c
| | | - system_stm32f7xx.c
| | | - TinyBMS.c
| |
| └───Startup
| | - startup_stm32f746zgtx.s
|
└───Drivers
| └───CMSIS
| | └───Device
| | | └───ST
| | | └───STM32F7xx
| | | └───Include
| | └───Include
| └───STM32F7xx_HAL_Driver
| └───Inc
| └───Src
|
└───Debug
└───Reference Docs
└───ARM & STM32 Docs
└───Screenshots
└───Traces