From 269c655dc5fc871c481595d6d771048d6e3340eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20=C3=96ster?= <dalathegreat@gmail.com>
Date: Thu, 18 Sep 2025 10:48:56 +0300
Subject: [PATCH] Add low 12V voltage safety to Volvo

---
 Software/src/battery/VOLVO-SPA-BATTERY.cpp  | 7 +++++++
 Software/src/datalayer/datalayer_extended.h | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Software/src/battery/VOLVO-SPA-BATTERY.cpp b/Software/src/battery/VOLVO-SPA-BATTERY.cpp
index fdb06df1..0ed7a29c 100644
--- a/Software/src/battery/VOLVO-SPA-BATTERY.cpp
+++ b/Software/src/battery/VOLVO-SPA-BATTERY.cpp
@@ -86,6 +86,13 @@ void VolvoSpaBattery::
       datalayer.battery.info.total_capacity_Wh = 69511;
     }
   }
+
+  //Check safeties
+  if (datalayer_extended.VolvoPolestar.BECMsupplyVoltage < 10700) {  //10.7V,
+    //If 12V voltage goes under this, latch battery OFF to prevent contactors from swinging between on/off
+    set_event(EVENT_12V_LOW, (datalayer_extended.VolvoPolestar.BECMsupplyVoltage / 100));
+    set_event(EVENT_BATTERY_CHG_DISCHG_STOP_REQ, 0);
+  }
 }
 
 void VolvoSpaBattery::handle_incoming_can_frame(CAN_frame rx_frame) {
diff --git a/Software/src/datalayer/datalayer_extended.h b/Software/src/datalayer/datalayer_extended.h
index b982e10f..1677ef3b 100644
--- a/Software/src/datalayer/datalayer_extended.h
+++ b/Software/src/datalayer/datalayer_extended.h
@@ -766,7 +766,7 @@ struct DATALAYER_INFO_VOLVO_POLESTAR {
   uint16_t soc_calc = 0;
   uint16_t soc_rescaled = 0;
   uint16_t soh_bms = 0;
-  uint16_t BECMsupplyVoltage = 0;
+  uint16_t BECMsupplyVoltage = 12000;
 
   uint16_t BECMBatteryVoltage = 0;
   int16_t BECMBatteryCurrent = 0;