MES-DEA info

Hi DerArtem,

Thank you for the generic datasheet.

This charger is not CAN controlled.

I could make it work on my bench by reverse engineering the connectors, see images attached.
Unknown is the rated PWM frequency, so a technical datasheet would be appreciated. I used a few kHz for testing.
Somewhere I found a note this charger works at PWM 5%..95%, else it shuts off.

I expect the charger works as a current source, so it will provide charging current based on PWM dutycycle as long as the output keeps in the 240V to 325V dc range.
Most likely you need to monitor the batterypack's state of charge and it's temperature by yourself.

Normally it is not a problem when the (Lipo) cells are discharged below a terminal voltage of 240V, the charger attempts to force current into the cells at lifting the terminals to 240V minimum.
However, the cells must be able to withstand charging at 240V minimum, when the charging current at this terminal voltage exceeds 26A max the charger will shut off.

cheers

Ah, cool thanks.

I want to replace with it my broken Zivan NG9 charger.

The BMS is controlling the Zivan Charger via PWM, so here it should be fine as it will track the battery voltages and can reduce the charging by PWM when the batteries get full.

Are you sure that the MES-DEA Charger needs a 12V supply? It does not make any sense to me.

The Zivan charger had 2 additional AUX relais contacts:

AUX1 - "Mains Presence" - when the car is connected to power the contact gets closes. Then the BMS activates the battery pack and connects the High Voltage lines. It then also blocks the car from driving.
AUX2 - "End of charge or Trickle Phase" - When the Stop Phase is reached, the contact closes. I am not sure what this was used for as the BMS known on its own the charge state of the batteries and also monitors the current in and out. How ever this contact was connected.

So I need at least to get "Mains Presence" working with the MES-DEA.

Also where have you got the connectors for the MES DEA from? I can not find the MAIN CONNECTOR (amphenol 5440 MDA203F 3x25A) anywhere. So I think that I will have to replace it with a different one.

The Zivan NG9 charger seems a fully autonomous charger. AUX1 to inform the BMS to close the switches between the charger and the HV battery. AUX2 to signal the charging process is ready.


The BC-278 is not an autonomous charger. Besides overvoltage and over current protection it is not intelligent, it tries to put current in the batteries based on the PWM input as long as the terminal voltage keeps in the min and max range.
Therefore the BMS must be able to monitor all important battery parameters (temp, SOC etc.) and stop PWM when required.

The existing AUX1 signal to your BMS can be realized by an external relais in parallel to the 220V AC supply of the BC-278. It seems to me you do not need AUX2 as the BC-278 follows the PWM out of the BMI.

I found the BC-278 connectors at Bart Ebben, specialist in Citroën Peugeot & used parts

https://bartebben.nl/

They have a lot of Citroën Berlingo Venturi parts.

Cheers

Thanks for your replies.

I have recived my charger today. Is is an BC-278-Z-3-A and not a BC-278-Z-3A-EF charger.
It has the same tech specs but has different connectors. The Mains connector is an 4-PIN CA3GS and a D-SUB 9 connector is used for the logic.

So far I have figured out:

PIN 1 - +12V supply (brown cable to lower PCB)
PIN 5 - GND supply (white cable to lower PCB)
PIN 3 - GND PWM (Green cable to top PCB)
PIN 8 - +12V PWM (Blue cable to top PCB)

Ok, accoring to the PCB the Green Cable is connected to Ground of HEF4016BT. So this one should be GND and the Blue one PWM+.

Can someone confirm this?

Thanks, Artem