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19 KiB
19 KiB
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BatteryStatus (UORB message)
Battery status.
Battery status information for up to 3 battery instances. These are populated from power module and smart battery device drivers, and one battery updated from MAVLink. Battery instance information is also logged and streamed in MAVLink telemetry.
TOPICS: battery_status
Fields
| Name | Type | Unit [Frame] | Range/Enum | Description |
|---|---|---|---|---|
| timestamp | uint64 |
us | Time since system start | |
| connected | bool |
Whether or not a battery is connected. For power modules this is based on a voltage threshold. | ||
| voltage_v | float32 |
V | Battery voltage (Invalid: 0) | |
| current_a | float32 |
A | Battery current (Invalid: -1) | |
| current_average_a | float32 |
A | Battery current average (for FW average in level flight) (Invalid: -1) | |
| discharged_mah | float32 |
mAh | Discharged amount (Invalid: -1) | |
| remaining | float32 |
[0 : 1] | Remaining capacity (Invalid: -1) | |
| scale | float32 |
[1 : -] | Scaling factor to compensate for lower actuation power caused by voltage sag (Invalid: -1) | |
| time_remaining_s | float32 |
s | Predicted time remaining until battery is empty under previous averaged load (Invalid: NaN) | |
| temperature | float32 |
degC | Temperature of the battery (Invalid: NaN) | |
| cell_count | uint8 |
Number of cells (Invalid: 0) | ||
| source | uint8 |
SOURCE | Battery source | |
| priority | uint8 |
Zero based priority is the connection on the Power Controller V1..Vn AKA BrickN-1 | ||
| capacity | uint16 |
mAh | Capacity of the battery when fully charged | |
| cycle_count | uint16 |
Number of discharge cycles the battery has experienced | ||
| average_time_to_empty | uint16 |
minutes | Predicted remaining battery capacity based on the average rate of discharge | |
| manufacture_date | uint16 |
Manufacture date, part of serial number of the battery pack. Formatted as: Day + Month×32 + (Year–1980)×512 | ||
| state_of_health | uint16 |
% | [0 : 100] | State of health. FullChargeCapacity/DesignCapacity |
| max_error | uint16 |
% | [1 : 100] | Max error, expected margin of error in the state-of-charge calculation |
| id | uint8 |
ID number of a battery. Should be unique and consistent for the lifetime of a vehicle. 1-indexed | ||
| interface_error | uint16 |
Interface error counter | ||
| voltage_cell_v | float32[14] |
V | Battery individual cell voltages (Invalid: 0) | |
| max_cell_voltage_delta | float32 |
V | Max difference between individual cell voltages | |
| is_powering_off | bool |
Power off event imminent indication, false if unknown | ||
| is_required | bool |
Set if the battery is explicitly required before arming | ||
| warning | uint8 |
WARNINGSTATE | Current battery warning | |
| faults | uint16 |
FAULT | Smart battery supply status/fault flags (bitmask) for health indication | |
| full_charge_capacity_wh | float32 |
Wh | Compensated battery capacity | |
| remaining_capacity_wh | float32 |
Wh | Compensated battery capacity remaining | |
| over_discharge_count | uint16 |
Number of battery overdischarge | ||
| nominal_voltage | float32 |
V | Nominal voltage of the battery pack | |
| internal_resistance_estimate | float32 |
Ohm | Internal resistance per cell estimate | |
| ocv_estimate | float32 |
V | Open circuit voltage estimate | |
| ocv_estimate_filtered | float32 |
V | Filtered open circuit voltage estimate | |
| volt_based_soc_estimate | float32 |
[0 : 1] | Normalized volt based state of charge estimate | |
| voltage_prediction | float32 |
V | Predicted voltage | |
| prediction_error | float32 |
V | Prediction error | |
| estimation_covariance_norm | float32 |
Norm of the covariance matrix |
Enums
SOURCE
WARNING
STATE
FAULT
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| MESSAGE_VERSION | uint32 |
1 | |
| MAX_INSTANCES | uint8 |
3 |
Source Message
::: details Click here to see original file
# Battery status
#
# Battery status information for up to 3 battery instances.
# These are populated from power module and smart battery device drivers, and one battery updated from MAVLink.
# Battery instance information is also logged and streamed in MAVLink telemetry.
uint32 MESSAGE_VERSION = 1
uint8 MAX_INSTANCES = 3
uint64 timestamp # [us] Time since system start
bool connected # Whether or not a battery is connected. For power modules this is based on a voltage threshold.
float32 voltage_v # [V] [@invalid 0] Battery voltage
float32 current_a # [A] [@invalid -1] Battery current
float32 current_average_a # [A] [@invalid -1] Battery current average (for FW average in level flight)
float32 discharged_mah # [mAh] [@invalid -1] Discharged amount
float32 remaining # [@range 0,1] [@invalid -1] Remaining capacity
float32 scale # [-] [@range 1,] [@invalid -1] Scaling factor to compensate for lower actuation power caused by voltage sag
float32 time_remaining_s # [s] [@invalid NaN] Predicted time remaining until battery is empty under previous averaged load
float32 temperature # [degC] [@invalid NaN] Temperature of the battery
uint8 cell_count # [-] [@invalid 0] Number of cells
uint8 source # [@enum SOURCE] Battery source
uint8 SOURCE_POWER_MODULE = 0 # Power module (analog ADC or I2C power monitor)
uint8 SOURCE_EXTERNAL = 1 # External (MAVLink, CAN, or external driver)
uint8 SOURCE_ESCS = 2 # ESCs (via ESC telemetry)
uint8 priority # [-] Zero based priority is the connection on the Power Controller V1..Vn AKA BrickN-1
uint16 capacity # [mAh] Capacity of the battery when fully charged
uint16 cycle_count # [-] Number of discharge cycles the battery has experienced
uint16 average_time_to_empty # [minutes] Predicted remaining battery capacity based on the average rate of discharge
uint16 manufacture_date # [-] Manufacture date, part of serial number of the battery pack. Formatted as: Day + Month×32 + (Year–1980)×512
uint16 state_of_health # [%] [@range 0, 100] State of health. FullChargeCapacity/DesignCapacity
uint16 max_error # [%] [@range 1, 100] Max error, expected margin of error in the state-of-charge calculation
uint8 id # [-] ID number of a battery. Should be unique and consistent for the lifetime of a vehicle. 1-indexed
uint16 interface_error # [-] Interface error counter
float32[14] voltage_cell_v # [V] [@invalid 0] Battery individual cell voltages
float32 max_cell_voltage_delta # [V] Max difference between individual cell voltages
bool is_powering_off # Power off event imminent indication, false if unknown
bool is_required # Set if the battery is explicitly required before arming
uint8 warning # [@enum WARNING STATE] Current battery warning
uint8 WARNING_NONE = 0 # No battery low voltage warning active
uint8 WARNING_LOW = 1 # Low voltage warning
uint8 WARNING_CRITICAL = 2 # Critical voltage, return / abort immediately
uint8 WARNING_EMERGENCY = 3 # Immediate landing required
uint8 WARNING_FAILED = 4 # Battery has failed completely
uint8 STATE_UNHEALTHY = 6 # Battery is diagnosed to be defective or an error occurred, usage is discouraged / prohibited. Possible causes (faults) are listed in faults field
uint8 STATE_CHARGING = 7 # Battery is charging
uint16 faults # [@enum FAULT] Smart battery supply status/fault flags (bitmask) for health indication
uint8 FAULT_DEEP_DISCHARGE = 0 # Battery has deep discharged
uint8 FAULT_SPIKES = 1 # Voltage spikes
uint8 FAULT_CELL_FAIL= 2 # One or more cells have failed
uint8 FAULT_OVER_CURRENT = 3 # Over-current
uint8 FAULT_OVER_TEMPERATURE = 4 # Over-temperature
uint8 FAULT_UNDER_TEMPERATURE = 5 # Under-temperature fault
uint8 FAULT_INCOMPATIBLE_VOLTAGE = 6 # Vehicle voltage is not compatible with this battery (batteries on same power rail should have similar voltage)
uint8 FAULT_INCOMPATIBLE_FIRMWARE = 7 # Battery firmware is not compatible with current autopilot firmware
uint8 FAULT_INCOMPATIBLE_MODEL = 8 # Battery model is not supported by the system
uint8 FAULT_HARDWARE_FAILURE = 9 # Hardware problem
uint8 FAULT_FAILED_TO_ARM = 10 # Battery had a problem while arming
uint8 FAULT_COUNT = 11 # Counter. Keep this as last element
float32 full_charge_capacity_wh # [Wh] Compensated battery capacity
float32 remaining_capacity_wh # [Wh] Compensated battery capacity remaining
uint16 over_discharge_count # [-] Number of battery overdischarge
float32 nominal_voltage # [V] Nominal voltage of the battery pack
float32 internal_resistance_estimate # [Ohm] Internal resistance per cell estimate
float32 ocv_estimate # [V] Open circuit voltage estimate
float32 ocv_estimate_filtered # [V] Filtered open circuit voltage estimate
float32 volt_based_soc_estimate # [-] [@range 0, 1] Normalized volt based state of charge estimate
float32 voltage_prediction # [V] Predicted voltage
float32 prediction_error # [V] Prediction error
float32 estimation_covariance_norm # [-] Norm of the covariance matrix
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