CubeSat Electrical Power System EPS | NanoAvionics
Electrical Power System (EPS) and Accessory Boards

Electrical Power System and Accessory Boards

The minimum order quantity for this subsystem is 5 pieces.

NanoAvionics First Generation Electrical Power System (EPS 1.0) is designed to meet the newest nanosatellite market demand, requiring high power in a small size.

The EPS is a subsystem that manages the power collection and distribution in the satellite with an integrated Battery Management System (BMS). All subsystem and payload power supply are controlled via the EPS and all of the output channels can be switched on and off autonomously or by ground command. The EPS stores generated energy in onboard Lithium-Ion batteries. To ensure a safe battery working environment the EPS is integrated with battery heaters and battery balancing functions.

NanoAvionics EPS can be paired with additional Accessory Boards further expanding the capabilities of the Electrical Power System:

  • EPS Output Channel Expander (OCE)
  • EPS High Voltage Expander (HVE)

EPS OCE increases the number of available EPS outputs and output voltages. It consists of four configurable DC/DC converters and a total of 8 output channels, each having voltage and current measurement functions, as well as overcurrent protection.

EPS HVE is a PCB module containing two non-isolated DC/DC boost converters capable of providing 100 W of power per channel with up to 96.6 % efficiency.

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The minimum order quantity for this subsystem is 5 pieces.

NanoAvionics First Generation Electrical Power System (EPS 1.0) is designed to meet the newest nanosatellite market demand, requiring high power in a small size.

The EPS is a subsystem that manages the power collection and distribution in the satellite with an integrated Battery Management System (BMS). All subsystem and payload power supply are controlled via the EPS and all of the output channels can be switched on and off autonomously or by ground command. The EPS stores generated energy in onboard Lithium-Ion batteries. To ensure a safe battery working environment the EPS is integrated with battery heaters and battery balancing functions.

NanoAvionics EPS can be paired with additional Accessory Boards further expanding the capabilities of the Electrical Power System:

  • EPS Output Channel Expander (OCE)
  • EPS High Voltage Expander (HVE)

EPS OCE increases the number of available EPS outputs and output voltages. It consists of four configurable DC/DC converters and a total of 8 output channels, each having voltage and current measurement functions, as well as overcurrent protection.

EPS HVE is a PCB module containing two non-isolated DC/DC boost converters capable of providing 100 W of power per channel with up to 96.6 % efficiency.

  • EPS 1.0 Features:

    Highlight Features:

    • Wide range solar panel input voltages
    • Four MPPT converters with 8 solar panel input channels
    • Four output converters with 18 output channels
    • High output power (up to 175 W)
    • Integrated ideal diodes
    • On-board Lithium-Ion battery pack
    • Integrated battery balancing
    • On-board battery heaters
    • Overcurrent protection, battery undervoltage and overvoltage safety features
    • External battery pack provides up to 161 Wh battery capacity
    • Current, voltage, and temperature logging
    • Software configurable output channel overcurrent protection
    • Implemented EPS watchdog system
    • Supports CAN communication interface with CSP protocol
    • EPS configuration through USB interface
    • ISS Kill Switch option
    • Always-ON Real Time Clock
    • Thermal vacuum tested
    • PC/104 standard
    • IPC-A-610 Class 3 assembly

    Main Specifications:

    • MPPT converter efficiency: up to 96 %
    • Output converter efficiency: up to 96 %
    • Four regulated voltage rails: 3.3 V; 5 V; Configurable 3 – 12 V.
    • Unregulated voltage rail: 7.0 – 8.3 V.

    Outputs:

    • Up to 18 output channels (configurable voltage rail)
    • Typical output channel current: 3.13 A (configurable)
    • Max 3.3 V Output converter power: 20 W
    • Max 5 V Output converter power: 20 W
    • Max 3-18 V Output converter power: 20 W

    Inputs:

    • Four MPPT converters (8 solar panel input channels) with integrated ideal blocking diodes
    • Solar panel voltage range: 2.6 – 12 V
    • Max input power per MPPT converter: 25 W

    Configuration Options:

    Power Supply System EPS 2S1P Configuration
    Max Unregulated Output Power 25 W
    Max Charging Power 10 W”

    Power Supply System EPS 2S2P Configuration
    Max Unregulated Output Power 50 W
    Max Charging Power 20 W”

    Power Supply System EPS 2S3P Configuration
    Max Unregulated Output Power 75 W
    Max Charging Power 30 W”

    Power Supply System EPS 2S4P Configuration
    Max Unregulated Output Power 100 W
    Max Charging Power 40 W”

    Power Supply System EPS 2S5P Configuration
    Max Unregulated Output Power 125 W
    Max Charging Power 50 W”

    Power Supply System EPS 2S6P Configuration
    Max Unregulated Output Power 150 W
    Max Charging Power 60 W”

    Power Supply System EPS 2S7P Configuration
    Max Unregulated Output Power 175 W
    Max Charging Power 70 W”

  • EPS OCE Features:
    • Additional 4 DC/DC converters and 8 output channels in total
    • Four output converters can be configured to user-defined output voltage (3 – 12 V)
    • Current, voltage and temperature logging
    • Software configurable output channel overcurrent protection
    • PC/104 standard
    • IPC-A-610 Class 3 assembly
  • EPS HVE Features:
    • Two independent 100 W DC/DC boost converters
    • Two output converters can be configured to user defined output voltage (12 V – 28 V)
    • IPC-A-610 Class 3 assembly