Merge pull request 'Fix for Current Calculation in PWR Ctrl' (#880) from fix-soc into main

Reviewed-on: #880
Reviewed-by: Robin Müller <muellerr@irs.uni-stuttgart.de>

CHANGELOG.md

@@ -16,6 +16,10 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
+## Fixed
+
+- Fixed wrong sign in calculation of total current within the `PWR Controller`.
+
 # [v7.7.3] 2024-03-18
 
 - Bumped `eive-fsfw`

mission/controller/PowerController.cpp

@@ -182,7 +182,7 @@ void PowerController::calculateStateOfCharge() {
   }
 
   // calculate total battery current
-  iBat = p60CoreHk.batteryCurrent.value + bpxBatteryHk.dischargeCurrent.value;
+  iBat = p60CoreHk.batteryCurrent.value - bpxBatteryHk.dischargeCurrent.value;
 
   result = calculateOpenCircuitVoltageCharge();
   if (result != returnvalue::OK) {