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--- sbms4080 [2017/04/05 17:21]
karl angelegt
+++ sbms4080 [2017/04/10 07:48] (aktuell)
karl [Power Dissipation]
@@ Zeile 9: / Zeile 9: @@
 There were some issues, which I think are woth noting.
+===== Technical Data =====
+==== Power Dissipation ====
+Without any heatsink, 6W of dissipation on the power MOSFETs is possible. With Heatsink more than 20W are possible.
+=== PV-Input ===
+mV/A --> 9.6W@40A
+=== Load-Outpt ===
+mV/A --> 0.8W@20A
 ===== Missing Parts =====
@@ Zeile 25: / Zeile 38: @@
 The UART is connected to external pins via opto coupplers. Somehow the Tx line is without negation, and the Rx line is negated. I've fixed this with some enameled copper wire and resistors.
-TODO: picture
+Fixed Version:
+{{ ::2017-04-05_003.png?direct&600 |}}
+{{ :fixed-sbms4080.jpg?direct&600 |}}
 ===== Flashing the Firmware =====
-For flashing the firmware I've used the Rx and Tx lines, connected to the external pins. As USB adapter I've used the FTDI converter to 3.3V UART, with an 3.9k Ohm external pullup for the BMS's Tx line.
+For flashing the firmware I've used the Rx and Tx lines, connected to the external pins((they have been fixed, see [[#Rx_and_Tx]])). As USB adapter I've used the FTDI converter to 3.3V UART, with an 3.9k Ohm external pullup for the BMS's Tx line.
 The Boot0 pin (pin 44 of the MCU) is floating by default. For programming it has to be connected to VCC (3.0V).
@@ Zeile 37: / Zeile 52: @@
 After flashing, Boot0 pin has to be connected to GND.
+Dacian [[https://youtu.be/_QlPJbhoiBo?t=2736|explains here]] how to use a ST Microselectronics developmentboard to programm it via USB.
 ===== Mechanical Tolerances Missmatch of LCD =====
-The LCD loses the signal very easy. It helps, to move the LCD as far to the North as possible before mounting the top PCB with the capacitive touch sensors.
+The LCD loses the signal very easy. It helps, to move the LCD as far to the North as possible before mounting the top PCB with the capacitive touch sensors. I also removed the zebra conductor from the LCD and cleaned all surfaces with "Kontaktspray". Since then there was no problem any more.

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