ARDRUINO Basic BMS control system

WANING : one wrong part in the code and your charger wil not be stopt charging and may turn your car into a blazing fire.
use at your own risk.

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Hey.

well i wanted to start a thread about using a arduino UNO to control the charger for my plugin

I have a elcon 1500 with analog curren control and no canbus

have 9 cellogs that monitor the cell voltages and trip a relay when one is to high and 70 bleedingboards for top balancing.

A little history:

Lopez started a project with a duinomite mega and DMbasic programming.
because of this i also got a mega and made my first steps in programming that board.

Lopez and others where already way in front of me programming stuff for it and so i desided to try a simple relay control
using a 4 relay from ebay i was able to control those with switches connected to the duinmite.

then a light bulb turned on.. i can use this to control my charger.

so i did... but during that time i also read about the arduino again and got reintressed in trying that board as a controller.

and because the arduino is smaller and a lot cheaper then the duinomite mega i got one of those for about 15 euro or at this time 17 dollars.
compared to the 30 euro for the duinomite mega.
ofcourse the UNO that i use does not come with canbus and other stuff so that compared its not cheaper but i dont need that for my charger control.

The board i got was a arduino UNO clone from dealextreme and i just got it 2 days and it seems to work good.


i have no clue how to program these things so i started of using sample sketches as they call it.

here is my first code that i adjusted from a button press example code.

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//BASIC ANOLOG BMS CONTROL 1.0( no CANBUS )
//created 5 sept 2012
//by Flying White dutchman
//modified 5 sept 2012
//by Flying White dutchman

//This example code is in the public domain.

// constants won't change. They're used here to
// set pin numbers:
const int buttonPin = 3; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin
const int ledPin2 = 14; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status

void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}

void loop(){
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
unsigned long starttime = 0;
unsigned long endtime = 0;
starttime = millis(); // set current time of system what is about 1 second or zero seconds because of unsigned long starttime = 0
endtime = 10000; // timer in miliseconds

// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (millis() > endtime) { //over time
digitalWrite(ledPin, LOW); //relais off
delay(5000);
}
else {
// turn LED off:
digitalWrite(ledPin2, LOW);
}
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
}
else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}


----
the onboard LED wil turn off when the digital pin 3 is grounded with a resistor.
when 5volts is connected to pin 3 the led will turn on.

The led is a simulated relay what will turn on and off.
after ( in this code just 10 sec ) 10 seconds the led wil stay off .


this part i wil use for the balancing ,
i know it wil take 30 min and will set it to 40 min from the moment the first cellog will trip a relay based on a high cell and when the last cell is also high.
during that time the charger wil be turned on and off for balancing and after 40 min a compleet shutdown until mains power is cycled on and off and the board is started again.

next step will be the real relays connected and things to do are
- temp sensor to stop charging and fan control
-relay based on temp sensor control fan connected to battery pack
- relay to flash external LED at window so i can see car is charging or finished and fast flash wil mean warning to high temp.

 

yhea going to be some time
need to learn how to program these things and also looking into a ethernet attached relay control where i can power of disconnect the main in the building where my car is parked.
by using my android phone ;-)
AND stil want to look at the duinomite canview stuff AND have ethernet shield for my arduino AND still have to life

 

currently waiting for a dedicated relay board for this project.
when i get that and get this to work then i can get my duinomite free again for the canview.bas project.
i geuss it will be a week or so ( china takes some time ;-) )

 

Well still waiting
China is not always that fast...

I did recieve me lcd screen for the Duinomite.
But i need my 2e relay board

-Tapatalk

 

Well i still have not recieved the relay board for this setup.

So i got a refund now pfff.

But also no progress... Because of that.

I desided that a second Duinomite would be best.
1 for the bms control and ( hopefully not for nothing now lopez is going to use a different board )a second Duinomite as canview.

Using a open collector output with 5 bootsen to the 5 volts input of the charger to go from full charge 5 volts to 1,7 volts stop charge voltages on the enable sure of the elcon tc charger.

That way i do not need a relay board and can use the one i have for ev and phev relay on the lopez Duinomite canview.


-Tapatalk

 

Have recieved several china packages but still no relays board that i am trying to get one off again....


Also al china packages are now being opent by china customs for some reason....


-Tapatalk

 

Canview uses read relays.. not sure about the bms2
.

Yes the relays rust you also have is cheaper.
I got it from the dame place you got it from

And so i got a second one.

But that one never got here..


But i have a,update.. i got one today from a other seller..

So Maybe sometime soon i will start with this ...

Just this week i started a new journey ij me life where i will have less time for this i am afraid.


I did already du some code for the ardruino but i am having trouble with the timer setting.

Ita not as simple as with the basic coding.

-Tapatalk