DC Bus Controller

Products

DC Bus Controller

Safely design interlock circuits of electric vehicles with the Safe Interlock Unit SIU

The DC bus controller transforms the conventional power distribution unit (PDU) into an intelligent component with current and temperature measurement, pre-charging and discharging functions and industry-standard diagnostic services. The controller is extremely flexible and can be adapted to different requirements. The integrated software also enables advanced diagnostic and analysis functions, such as dynamic load calculations for fuses or predictive maintenance models.

01.

Simplifies integration

All the functions of a PDU are controlled by the DC bus controller and made available via CAN. No complex cable harnesses to the PDU are required.

02.

Cyber security & functional safety

The control system contributes to the functional safety of the overall system and meets the highest cyber security requirements.

03.

Makes PDUs intelligent

The component enables model-based power control based on the thermal state of the vehicle. It enables intelligent control of DC charging.

Tech Specs

Application

The DC bus controller is our electronic control unit that is suitable for various applications in electric vehicles. Its flexible architecture allows it to be used in components such as power distribution units (PDUs), DC charging interfaces or battery disconnection units. Thanks to the flexible internal interfaces, the functions required for the various applications can be implemented with expansion boards.

*A sample available. B samples and special equipment are available on request.

Technical Drawing

DC Bus Controller technical drawing
Functional overview DC bus controller - form factor can be adapted on request

Functional overview DC bus controller - form factor can be adapted on request

Norms and Regulations

  • AECQ-100 automotive compliant

  • ISO 6469-3:2018 compliant

  • ASIL Ready, ISO 26262 on request

  • ECE R10-compliant on request

Specifications

  • Dimensions. 123.86mm / 105.25mm / 11mm

  • Wide-range supply (8-36V)

  • Wake-up time <100ms

  • Secured CAN2.0B interface, 500 kBaud (adjustable)

  • Interlock circuit according to LV123

  • 3 contactor drivers with feedback input and integrated software switch counter

  • 6 analog sensor inputs (I, U, R) for the most common current and temperature sensors

  • Daisy chain / stackable of several DC bus controllers

  • Several extensions available: HV sensor module, current sensor module, inlet control module

  • Versatile expansion interface (internal CAN / LIN / SPI / UART) for customizable applications and any type of third-party sensors and actuators.

  • UDS / J1939 diagnostic functionality

Interface description

VehicleCom
Main connection to the vehicle system
K15, Interlock In / Out, CAN
Connector: Molex 560020-1020

Supply
Board Input Supply
K30, K31
Connector: JAE MX81A004NF1R300

IO-Drive
Primary function: 3x switch driver
Secondary function: GPIO
K31, Relay+, Relay feedback
Connector: JAE MX81A004NF1R300

Supply Out
Switched supply max 10A
K30S, K31
Connector: JAE MX81A002NF1R470

Sensor In
6x Sensor Input configurable (4..20mA, 0..5V, 0.1..10k) +5V, Signal In, K30S
Connector: Molex 502352-0301

Aux
Flexible extensions for additional functions, e.g. inlet control unit
KL31, +5V, SPI, LIN, GPIO, UART
Connector: Molex 560020-1020

Extension In
Extension to add multiple DC controller boards in series or third-party components
K30S, K31, CAN
Connector: Molex 502352-0601

Extension Out
Extension to add multiple DC controller boards in series or third-party components
K30S, K31, CAN
Connector: Molex 502352-0601

Extensions

Multiple DC bus controllers in daisy chain configuration

The functions of the DC bus controller can be easily expanded by adapting it to your product requirements. The DC controller board can either be used in parallel via the expansion interface or the additional modules can be connected via the aux port. Multiple boards can be connected as a daisy chain.

HV card: 2x 1000V voltage measurement, 2x temperature measurement, additional relay for precharging
Current: Current measurements according to customer requirements
Inlet: Inlet controller for DC charging functionality, including communication, LED driver, lock driver, CP PP

DC bus controller with various extensions

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