Modular Electrical Power System (IMEPS2)
Innovative Space Logistics
The IMEPS2 is a second-generation modular electrical power system designed for small satellites, offering adaptable power solutions with superior efficiency and scalable redundancy.
Typed specifications139 values
Discloses 12 of 14 fields engineers filter by in this category (category median 7).
- Mass
- 252 g PBP-4S1P battery pack · datasheet p.8 48.7 g PBU | 58 g PCU | 57.4 g PDU (incl. bottom mount full CSKB) | 51.6 g PDU (incl. top mount full CSKB) +2
- Total output power
- 48 W max · PBU max output power per battery channel/pack at 12 V · datasheet p.9 64 W max · PBU max output power per battery channel/pack at 16 V
- Envelope (L×W×H)
- Height: PDU 11 mm, PBU 10 mm, PCU 12 mm, PBP-4S1P 21 mm datasheet p.7 11 mm PDU Height
- Outputs (as printed)
- VD0: fixed (= rail voltage); VD1: user selectable (only below rail voltage); VD2: user selectable (only below rail voltage) datasheet p.7 VDx: x 4 (Option using DaughterBoard mounted regulator)
- Supply voltage
- 12.8 V nom. · VD0 voltage domain (battery) · datasheet p.4 12.8 V Battery pack operating voltage | 16 V PCU Output Voltage | 3.3 V VD1 and VD2 voltage domain | 12 V max · VD1 and VD2 voltage domain (custom) +5
- Power consumption
- 19.2 W BU max input power (per battery channel/pack) at 12V · datasheet p.9 25.6 W BU max input power (per battery channel/pack) at 16V | 48 W BU max output power (per battery channel/pack) at 12V | 64 W BU max output power (per battery channel/pack) at 16V | 0.063 W PBU idle consumption (3.9 mA at 16 V) +8
- Data interface
- I2C datasheet p.8 SPI optional | I2C two independent I2C interfaces; isolated I2C bus segment per … | UART | SPI optional +2
- Operating temperature
- -40–70 °C datasheet p.7 -40–70 °C operational temperature
- Unit type
- integrated EPS with battery modular stack: PCU + PBU + PBP battery packs + PDU · datasheet p.4
- Board format
- CubeSat Kit bus CSKB outputs and inter-stack CSKB connections · datasheet p.5 PC/104 follows a PC104 form factor | PC/104 PDU
- Bus and outputs type
- hybrid (regulated rails + battery bus) VD0 = unregulated rail (battery) voltage; VD1/VD2 regulated b… · datasheet p.7
- Unregulated (battery) bus voltage
- 12.8 V PBP operating voltage · datasheet p.4 12.8 V PDU output channel Vbat | 12.8–16 V common power rail voltage | 16 V PBP operating voltage | 16 V PDU output channel Vbat
- Regulated output voltages
- 16 V PCU output voltage (other voltages upon request) · datasheet p.4 12.8 V PDU VD0 | 3.3 V PDU VD1, VD2 | 12 V PDU_DB VDx | 5 V VD1 default configuration +5
- Switchable outputs
- 4 PDU VD0 · datasheet p.4 4 PDU VD1 | 4 PDU VD2 | 4 PDU_DB | 12 per PDU: VD0 x4, VD1 x4, VD2 x4 switchable channels
- Solar array inputs
- 4 per PCU board: 4x MPPT channels · datasheet p.4
- Solar input voltage window
- 2V min, 13V max datasheet p.10 2 V min · PV input | 13 V max · PV input with battery voltage >14V | 2–13 V PV input min/max voltage (with battery voltage above 14 V)
- Max solar input power
- 39 W PCU per channel (5 series, 6 parallel solar cell strings) · datasheet p.4 39 W max · CU max input power per channel (5 series, 6 parallel solar ce…
- Solar array regulation
- MPPT harvesting mechanism: Maximum Power Point Tracking; boost-onl… · datasheet p.9
- Integrated battery energy
- 90 Wh available configuration · datasheet p.2 45 Wh per PBP-4S1P pack (4 cells) | 135 Wh available configuration
- Protections
- - Overcurrent/thermal limit on Unit input; - Overvoltage protection on all domains; - On each output bus channel: Overcurrent/thermal protection; - Voltage ramp slew rate control; - Reverse current protection; - Safety Mode (when VD0 low); - Emergency Low datasheet p.8 watchdog hardware supervisor including watchdog; TT&C watchdog | over-current (LCL) overcurrent/thermal limit on unit input and on each output bu… | over-temperature overcurrent/thermal protection | over-voltage overvoltage protection on all domains; TVS diodes +7
- Connector
- Harness interconnect: multicore wire, Harwin M80 L-Tek; daisy chain or point to point board interconnect datasheet p.7
- Survival temperature
- -40–85 °C datasheet p.7 -40–85 °C storage temperature
- Flight heritage
- Design based on heritage from ICEPS1 design flown on PEASSS CubeSat (2016). IMEPS1, first generation, flown in 2018. IMEPS2 first flown in 2020. datasheet p.3
- Satellite class
- CubeSat compliant to CubeSat standard; CubeSat missions from 3U upwards · datasheet p.1 nanosat 1-10 kg targeting larger nano- and micro-satellites from 3U upwards | microsat 10-100 kg targeting larger nano- and micro-satellites from 3U upwards
- Missions flown
- 1 IMEPS1 · datasheet p.3 1 IMEPS2
- Quasi-static load
- 10.8 g design qualification load, static, three axes · datasheet p.3
- Max current per output
- 3 A PCU Maximum Input Current per channel · datasheet p.4 3 A PDU Max current per output channel (hardware current limited) | 4 A PDU Max total current for VD1 (continuous) | 6 A PDU Max total current for VD1 (peak) | 4 A PDU Max total current for VD2 (continuous) +15
- Battery voltage range accepted
- 14.4 V nom. · battery pack nominal voltage · datasheet p.8 12.8–16 V | 16.8 V abs max, Battery pack abs max voltage | 10 V min · Battery pack min voltage | 12.8 V min · Common Power Rail +3
- Max battery charge current
- 1.6 A Battery pack max input current · datasheet p.9 1.6 A max · battery pack max input current
- MPPT
- yes hardware-based maximum power point tracking · datasheet p.2
- Max solar input current
- 3 A max · maximum input current per PCU channel · datasheet p.10
- Integrated battery cell configuration
- 4 cells in series (PBP-4S1P), up to three battery packs per battery unit board datasheet p.8
- Battery heater control
- yes battery heating per pack, closed loop controlled, in orbit co… · datasheet p.9
- Housekeeping telemetry
- MCU/PCB temperature; voltage, current and power measurements on total unit input, total output for VD0/VD1/VD2 and each output bus channel; per cell voltage and 2x temperature sensors per battery pack datasheet p.8
- Redundancy
- other multiple PDU / PCU / PBU boards in parallel for redundancy; t… · datasheet p.2
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier20 lines, in the manufacturer's own wording
- Flight heritage
- since 2020
- Battery packs
- Up to 45 Wh per PBP, stackable for redundancy
- Operating temperature
- -40 to +70 °C
- Storage temperature
- -40 to +85 °C
- Lifetime
- 12 months
- Supply voltage
- 12.8 – 16.0 V
- PDU Height
- 11 mm
- PDU Mass
- 51.6 g (incl. top mount full CSKB)
- PDU Idle consumption
- 66 mW (4.1 mA @ 16 V)
- PDU Input maximum current
- 8 A
- PDU Output maximum current
- 3 A per channel
- PDU Total output maximum current (VD1)
- 4 A (continuous), 6 A(peak)
- PDU Total output maximum current (VD2)
- 4 A (continuous), 6 A(peak)
- Interface
- I2C, UART, SPI optional
- PBP Height
- 21 mm
- PBP Mass
- 252 g
- PBP Battery pack nominal voltage
- 14.4 V
- PBP Battery pack operating voltage
- 12.8-16.0 V
- PBP Battery pack nominal capacity
- 3200 mAh
- PBU Height
- 10 mm
About
The second-generation Modular Electrical Power System (IMEPS2) redefines Electrical Power Subsystems for small satellites. Built on a modular, distributed design, it enables unmatched adaptability, tailoring power solutions to your platform’s exact needs without full customization. With cutting-edge technology, IMEPS2 ensures superior efficiency, reduced EMI, and scalable redundancy across. It features battery packs that expand storage with up to 45Wh per PBP, which are stackable for redundancy. The system also includes power conditioning with scalable MPPT channels for optimal solar input, and power distribution with fully configurable outputs and time delays, user-defined voltages, and robust redundancy options for mission assurance. It has flight heritage since 2020.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.