NANOeps-mini with 31 Wh battery pack
NANOeps-mini (2nd Generation)
All-in-one electrical power system for nanosatellites
The NANOeps-mini is all-in-one EPS solution, targeted for use on nanosatellites. NANOeps-mini integrates all features of Power Control and Distribution Unit, Battery Management Module with integrated battery pack, and solar array inputs with safest and most accurate solar array energy conversion method using the novel Analog MPPT feature. Those features makes EPS really the most integrated EPS solution on the market. The battery pack features an active balancing to provide outstanding life-time and heating systems for the maximal battery cells protection. The NANOeps-mini represents the second generation of SkyLabs’s flight proven equipment for the emerging space market. Its fault tolerance by design provides remarkable reliability and robustness against SEE. Fault tolerance is assured by the SkyLabs’ radiation harness assurance, that is based on a delicate component selection process and their radiation characteristics and flight heritage, latch-up protection by constant current monitoring and several other mitigation techniques. Several intelligent built-in functions enable NANOeps-mini fully autonomous operation, making the power distribution, battery management and solar array energy conversion practically autonomous.
Features
The NANOeps-mini with build-in PCDU is providing 5 independent power output channels. It features dedicated deployment actuator interface with two TLM deployment interfaces.
It is comprised of two independent modules, one dedicated to battery management and one dedicated to power distribution and solar array energy conversion, both acting as nodes on a redundant CAN bus.
- Battery pack with capacity of 31 Wh
- Charging interfaces, supporting a total charging current of 3.6 A
- Independent heaters and thermal sensor per battery cell
- Independent battery balancer per cell string
- Independent battery protection fuse per cell string
- Separation Switch and Remove Before Flight interfaces
- Radiation hardened by design to increase reliability and robustness
- Constant current monitoring and limiting
- Selective components technology selection with flight heritage
- EDAC/ECC protected memories
- Advance three-level FDIR protection
- Watch-dog timer
- SEE immune non-volatile MRAM memories for TM storage
- Instant boot up at power on
- Comprehensive local subsystem telemetry (currents, voltages, temperatures, etc.)
- Interfaces:
- Redundant CAN interface for TM/TC
- 5 power output channels (supporting 5V outputs)
- Dedicated monitoring of current and voltage
- Over-current and over/undervoltage protection
- 2 deployment actuator (up to 2A per channel) and deployment TLM interface
- Dedicated monitoring of current and voltage
- Over-current and over/undervoltage protection
- Debug connector for monitoring output channels and battery voltage during integration
Software support
NANOeps-mini has a flight proven functionality. It is delivered with skyEGSE-GUI application to enable user immediate out of the box control, monitor and management of the equipment.
NANOeps-mini is compliant with optional NANOsky CMM™ SDK that provides all functions to support controlling, monitoring and management of NANOeps-mini equipment. All functions are provided in a comprehensive C++ library, with application-level examples for fast prototyping or functionality integration to a third-party software. This enables users a drastic savings in the development time for integration of SkyLabs equipment functions into customer specific EGSE, AIV/T or even MOC software.
Technical specifications
| Battery pack capacity | 31 Wh |
| Battery pack life time | > 30000 re-charge cycles @ 20% DoD (80% EOL capacity) |
| Charge rate | Continuous charge up to 3.6 A |
| Discharge rate | Continuous discharge up to 3.6 A, peak discharge up to 10.8 A |
| Output channels | 5x 5V output |
| Maximal output channel current | Preconfigured to: 1 A, 1.25 A, 1.5 A, 2.4 A, 3 A, 3.5 A, or 6 A |
| Deployment Interfaces | 1x deployment interface outputs:
· Unregulated output voltage · Up to 2 A deployment current 1x deployment interface inputs: · Input voltage range up to 12 V. Solar array inputs: · 4x channels with AMPPT |
| Separation/RBF Switches | Single separation switches:
· Disconnect battery from bus. · Disconnect output channels from bus. RBF pin input and output: · Disconnect battery from bus. · Disconnect output channels from bus |
| RBF Switches | RBF pin input and output:
· Disconnect battery from bus. · Disconnect output channels from bus |
| Battery balancer | Active battery balancing per cell string. |
| Battery heaters | Individual thermal monitoring and heating per cell, heat power per cell up to 7.5 W |
| Battery fuse | One non-resettable fuse per battery string:
· Fuse current of 25 A. · I2t of 45 A2s. |
| On-board Communication interfaces | Redundant CAN bus for TM/TC |
| Supply voltage | Internal supplied from battery pack |
| Dimensions: | 95 x 91 x 54 mm |
| Operation temperature | -10 °C to +45 °C |
| Storage temperature | -10 °C to +50 °C |
| Mass: | 502 g |
| Radiation tolerance | > 30 krad (Si) SEE Tolerant |
| Quality Assurance: | ISO 19683:2017, ECSS-E-ST-10-02C/03C, IPC Class3+ |
