EVC (Electric Vehicle Computer): The EVC is the motor controller and is comparable with the Engine computer in a petrol car. Note that this box does not contain any power electronics, it is purely a “brain”. It also acts as a bridge between the main CANbus and the power train CANbus. Acronyms: SCH.

TCU (Telematics Control Unit): This is a GSM module sending mostly battery information to Renault. This module is connected to both the main CANbus and the Multi Media CANbus. Acronyms: None.

LBC and LBC2 (Lithium Battery Controller). This is a redundant computer located within the battery pack. It does not contain any power electronics, but it does monitor each individual cell and balances it slowly. These computers together are called the BMS (battery management system). Acronyms: None.

PEB (Power Electronics Block): This box, located on top of the motor, contains the power electronics that drive the three main coils of the motor. It also contains the DC/DC converter, which transforms 400 volt to the 12 volt bus. Acronyms: None.

BCB (Battery Connection Box) is in essence the charger. It contains the power electronics to charge the traction battery. It also feeds the rotor magnet in the motor and the PEB. It sits on top of the PEB and is the big metal box you see when opening the bonnet on a Q210/Q90 model. Acronyms: JBOX.

USM (Universal Safety Module) is the relay and fusebox under the hood. Acronyms: APC, UCM, UPC, UDP.

CLUSTER is the instrument panel. This module is connected to both the main CANbus and the Multi Media CANbus. Acronyms: BIC, GATEWAY, AFFICHEUR.

EPS is the Electric Power Steering. Acronyms: PAS.

AIBAG (Airbag) is the airbag controller, including the impact sensors. It is located under the hand brake handle. Acronyms: AIRBAG.

ESC (Electronic Stability Control) is a box controlling the friction brakes. It takes input from several sources and not only calculates and provides the friction braking to augment the regenerative motor braking, but also performs several stability functions, such as ABS, ASR, MSR, AYC, ESP, all functions to improve stability. Acronyms: ABS, BRAKE, ESP.

UBP (Uncoupled Brake Pedal) is a combination of the brake pedal, hydraulic booster and computer to control commanded braking. Acronyms: None.

BCM (Body Control Module) is a box that controls things like lights, locks, etcetera. This module is connected to both the main CANbus and the bus to the UPA. Acronyms: UCH.

CLIM is the Climate Control system. Acronyms: CLIMA, CLIMBOX.

UPA is the Park Assist system. Acronyms: None

AUTOS (R-LINK), RADIO (the tuner, acronym R1-08) and CENTRALSWITCH (the multi media joystick, acronym CSW) are computer systems too, connected to the Multi Media CANbus. Since the ELM devices are not wired to this network, there is no reference to these systems. Even the VSP (pedestrian horn) is a CANbus device on the power train CANbus, but it seems it cannot be addressed with diagnostics commands.

6 comments on “Computers
  1. Borut says:

    Do you think is possible to tap in to ZOE battery + and – to power the house or to charge the battery with solar pannels directly with a diy controller or to install ccs dc fast charge or chademo connector on zoe with only 22 kw charger ?
    thank you

    • Jeroen Meijer says:

      Since you rent the battery I would say contractually: no. Furthermore, tapping in a high current 400V circuit…. let me just say you really, really REALLY need to know what you’re doing. If you drop a spanner in a battery pack, you end up with serious welding, plasma arcing, an almost certain fire or explosion and possibly death. 93MJ is an awful lot of energy. Solar powering I already do. I accept the losses going through two inverters.

  2. borut says:

    Thank you for your replay.
    I know about the high voltage high power risk.
    I just want to know if it can be done.How would the bms and evc react since the power would not match (power in and power out of the battery)where is current meter? in bms(lbc) , evc or bcb .Who is dictating the current in (charging regenerative braking).

    Best regards

    • Jeroen Meijer says:

      Done: always, with the right resources.
      React: don’t know.
      Power meter: not sure, probably in the pack (LBC), absolutely not EVC.
      Dictating: LBC.

  3. Vladimir Kravchenko says:

    Hello. I have bought KW902 but it can only chech SOH of the battery.

  4. Gunther says:

    I bought the Vgate iCar 2 WiFi to use it with my iPhone. It is okay, but the DC of all battery cells and the temperature didn’t show. What is the problem? Thanks!

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