GOMspace NanoPower P60 Dock - Battery Pack and Heater Configuration

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NanoPower P60 Dock

July 14, 2017

gs-man-nanopower-p60-dock-2.1

and batt_crit). The software low voltage protection is a four state system with a CRITICAL, a SAFE, a

NORMAL and a FULL mode.

In normal mode everything is nominal but should the battery voltage drop below batt_safe, the P60 Dock will

change its output switch conﬁguration to a safe mode conﬁguration. This allows the P60 Dock to switch off of all

non-essential systems and leave a simple low power mode running.

Should the battery voltage continue to drop below batt_crit, the P60 Dock will switch off all channels.

The four battery voltage level parameters (batt_max, batt_norm, batt_safe and batt_crit) are each

conﬁgurable and must be set to match the battery and the channel control (see section Channel Control) must

be set accordingly to ensure that daughter boards are turned on/off as required by mission.

The following table shows the default settings for battery voltage levels.

Table 5.2: Recommended settings for battery voltage levels

Battery Pack Voltage 8 V 16 V 32 V

batt_max 8300 mV 16600 mV 32000 mV

batt_norm 7000 mV 14000 mV 28000 mV

batt_safe 6700 mV 13400 mV 26800 mV

batt_crit 6500 mV 13000 mV 26000 mV

5.2.5 Battery Pack

The P60 Dock must be conﬁgured with the battery pack type. The parameter batt_pack must be set with the

appropriate value for the batttery pack. The following table shows possible conﬁguration values:

Table 5.3: P60 Dock Battery pack values

Battery pack value Description

0 None

1 Reserved

2 BP4 Battery Pack

3 BPX Battery Pack

5.2.6 Battery Heater

For the BP4 battery pack, it is possible to enable heater control. The heater mode bp_heat_mode parameter

controls how the battery heater is turned on and off. The following table shows possible conﬁguration values:

Table 5.4: P60 Dock Battery heater control modes

Battery heater mode value Description

0 Heater always off

1 Heater on/off controlled by temperature thresholds

2 Heater always on

The heater on/off can be controlled by temperature thresholds by setting the bp_heat_high and

bp_heat_low parameters. The bp_heat_low parameter determines when to turn the heater on, i.e. when

the battery pack temperature goes below the bp_heat_low value, the battery heater turns on. Similar, the