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Fix battery params to better defaults

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This commit is contained in:
Lorenz Meier 2016-04-29 20:34:32 +02:00
parent c1bf70eea0
commit bf0ea86bd9
1 changed files with 22 additions and 17 deletions
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39
src/modules/systemlib/battery_params.c
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@ -43,66 +43,71 @@
#include <systemlib/param/param.h>
/**
* Empty cell voltage.
* Empty cell voltage (5C load)
*
* Defines the voltage where a single cell of the battery is considered empty.
* The voltage should be chosen before the steep dropoff to 2.8V. A typical
* lithium battery can only be discharged down to 10% before it drops off
* to a voltage level damaging the cells.
*
* @group Battery Calibration
* @unit V
* @decimal 2
* @increment 0.01
*/
PARAM_DEFINE_FLOAT(BAT_V_EMPTY, 3.35f);
PARAM_DEFINE_FLOAT(BAT_V_EMPTY, 3.5f);
/**
* Full cell voltage.
* Full cell voltage (5C load)
*
* Defines the voltage where a single cell of the battery is considered full.
* Defines the voltage where a single cell of the battery is considered full
* under a mild load. This will never be the nominal voltage of 4.2V
*
* @group Battery Calibration
* @unit V
* @decimal 2
* @increment 0.01
*/
PARAM_DEFINE_FLOAT(BAT_V_CHARGED, 4.2f);
PARAM_DEFINE_FLOAT(BAT_V_CHARGED, 4.1f);
/**
* Low threshold
*
* Sets the threshold (between 0 and 1, which is equivalent to between 0 and 100%)
* when the battery will be reported as low. This has to be higher than the critical
* threshold.
* Sets the threshold when the battery will be reported as low.
* This has to be higher than the critical threshold.
*
* @group Battery Calibration
* @unit norm
* @decimal 2
* @min 0.15
* @max 0.5
* @min 0.12
* @max 0.4
* @increment 0.01
*/
PARAM_DEFINE_FLOAT(BAT_LOW_THR, 0.18f);
PARAM_DEFINE_FLOAT(BAT_LOW_THR, 0.15f);
/**
* Critical threshold
*
* Sets the threshold (between 0 and 1, which is equivalent to between 0 and 100%)
* when the battery will be reported as critically low. This has to be lower than
* the low threshold. This threshold commonly will trigger RTL or landing.
* Sets the threshold when the battery will be reported as critically low.
* This has to be lower than the low threshold. This threshold commonly
* will trigger RTL or landing.
*
* @group Battery Calibration
* @unit norm
* @decimal 2
* @min 0.05
* @max 0.14
* @max 0.1
* @increment 0.01
*/
PARAM_DEFINE_FLOAT(BAT_CRIT_THR, 0.09f);
PARAM_DEFINE_FLOAT(BAT_CRIT_THR, 0.07f);
/**
* Voltage drop per cell on 100% load
* Voltage drop per cell on full throttle
*
* This implicitely defines the internal resistance
* to maximum current ratio and assumes linearity.
* A good value to use is the difference between the
* 5C and 20-25C load.
*
* @group Battery Calibration
* @unit V