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3bcd8c63f8
* Enhancement: State of health, and max_error value is added. Both shows battery health of SMBUS smart battery.
* Enhancement: BAT_C_MULT parameter is introduced. This is for high-current capable SMBUS-based battery.
As SMBUS only provides 16-bit for current, it could only be +-32768mA which is about +-32A.
But with proper treatment, it could be extended with little accuracy loss.
This factor can be set for individual battery system with available information.
* Relative SOC introduced. Proper SMBUS battery should provide percentage of remaining battery
directly. Therefore it does not have to be computed like before.
* State of Health introduced. Proper SMBUS battery should provide SOH value.
* Max error: this shows estimation error of BMS.
* Enhancement: With smart battery, precise estimation of time remaining is provided
with impedance track. It is unit of minute, so 60 seconds multiplied.
Update rate of this is not fast, but very useful.
Co-authored-by: Hyon Lim <lim@uvify.com>
37 lines
2.3 KiB
Plaintext
37 lines
2.3 KiB
Plaintext
uint64 timestamp # time since system start (microseconds)
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float32 voltage_v # Battery voltage in volts, 0 if unknown
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float32 voltage_filtered_v # Battery voltage in volts, filtered, 0 if unknown
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float32 current_a # Battery current in amperes, -1 if unknown
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float32 current_filtered_a # Battery current in amperes, filtered, 0 if unknown
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float32 average_current_a # Battery current average in amperes, -1 if unknown
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float32 discharged_mah # Discharged amount in mAh, -1 if unknown
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float32 remaining # From 1 to 0, -1 if unknown
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float32 scale # Power scaling factor, >= 1, or -1 if unknown
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float32 temperature # temperature of the battery. NaN if unknown
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int32 cell_count # Number of cells
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bool connected # Whether or not a battery is connected, based on a voltage threshold
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bool system_source # Whether or not a this battery is the active power source for VDD_5V_IN
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uint8 priority # Zerro based priority is the connection on the Power Controller V1..Vn AKA BrickN-1
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uint16 capacity # actual capacity of the battery
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uint16 cycle_count # number of discharge cycles the battery has experienced
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uint16 run_time_to_empty # predicted remaining battery capacity based on the present rate of discharge in min
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uint16 average_time_to_empty # predicted remaining battery capacity based on the average rate of discharge in min
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uint16 serial_number # serial number of the battery pack
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uint16 state_of_health # state of health. FullChargeCapacity/DesignCapacity.
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uint16 max_error # max error, expected margin of error in % in the state-of-charge calculation with a range of 1 to 100%
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uint8 id # ID number of a battery. Should be unique and consistent for the lifetime of a vehicle. 1-indexed.
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float32[10] voltage_cell_v # Battery individual cell voltages
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float32 max_cell_voltage_delta # Max difference between individual cell voltages
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bool is_powering_off # Power off event imminent indication, false if unknown
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uint8 BATTERY_WARNING_NONE = 0 # no battery low voltage warning active
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uint8 BATTERY_WARNING_LOW = 1 # warning of low voltage
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uint8 BATTERY_WARNING_CRITICAL = 2 # critical voltage, return / abort immediately
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uint8 BATTERY_WARNING_EMERGENCY = 3 # immediate landing required
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uint8 BATTERY_WARNING_FAILED = 4 # the battery has failed completely
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uint8 warning # current battery warning
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