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Edge Battery Junction Box

Edge BJB 1500

In development

High-voltage measurement and contactor control on one board, with the HV battery pack’s edge interface built in.

It runs no software of its own and switches its contactors on the controller’s command. A daisy-chain interface takes Battery Module Boards, and general-purpose I/O (GPIO, PWM) takes whatever else the HV battery pack needs.

The Edge BJB opened up, its lid, its PCB and its base apart.
Central controllerEthernetEdge BJB 1500Edge interfaceHV battery packBMB interfaceGeneral-purpose I/OGPIO · PWMMDrive systemAuxiliary loadContactorsShuntIsolation

What it handles

  • High voltage

    Up to six sensing channels.

  • Current

    Two independent measurement channels, for redundancy.

  • Temperature

    Shunt temperature, up to three channels, for calibration.

  • Isolation

    Continuous measurement, high-voltage system to chassis.

  • BMB interface

    A daisy chain to the Battery Module Boards along the HV battery pack.

  • General-purpose I/O

    GPIO and PWM pins, for whatever else the HV battery pack needs.

  • Contactor control

    Up to four contactors.

  • Overcurrent

    Detected on board and reported to the controller.

1500 V
Rated voltage
1000 A
Continuous current
4000 A
Peak current
ASIL D
Design target, ISO 26262

Specifications

Features
The controller decides; each Edge BJB 1500 measures, reports and switches.
Designed to trigger a safe-state transition on loss of communication.
Add HV battery packs on the same line; the controller’s hardware stays the same.
Plug-and-play hardware addressing.
Configurable report period.
Safety functions · ASIL D target
High-voltage inputsUp to 6 sensing channels
Current1000 A continuous, 4000 A peak; 2 independent measurement channels, for redundancy
IsolationContinuous measurement, derived from the HV measurement network
Contactor controlUp to 4 contactors
Interfaces
Host interfaceEthernet
BMB interfaceDaisy chain to the Battery Module Boards, independent of the main measurement path
General-purpose I/OGPIO and PWM
General
Rated voltage1500 V
Temperature sensingUp to 3 channels, shunt temperature for calibration
Supply12 V to 24 V (KL30)
Operating temperature−40 °C to +125 °C, automotive grade
Functional safetySEooC, ASIL D target under ISO 26262
Scope of supplyThe electronics; contactors, enclosure and busbars are the customer’s choice

System topology

One Edge BJB 1500 per HV battery pack, all on one shared line to the controller.

Central controllerZonal controlleror Central BMSONE SHARED LINEHV battery pack 1 · Edge BJB 1500HV battery pack voltage and currentIsolationContactorsBMB interfaceGeneral-purpose I/O1 edge interfaceHV battery pack 2 · Edge BJB 1500HV battery pack voltage and currentIsolationContactorsBMB interfaceGeneral-purpose I/O1 edge interfaceHV battery pack 3 · Edge BJB 1500HV battery pack voltage and currentIsolationContactorsBMB interfaceGeneral-purpose I/O1 edge interfaceHV battery pack 4 · Edge BJB 1500HV battery pack voltage and currentIsolationContactorsBMB interfaceGeneral-purpose I/O1 edge interfaceFAIL-SAFE · The Edge BJB 1500 is designed to trigger a safe-state transition on loss of communication.
Central controllerEdge BJB 1500 and its edge interfaceEthernet line · readingsCommands · heartbeat

Contact

Detailed specifications are available on request.

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