Hypersonic Propulsion Vehicle
Hypersonic Propulsion Development Program: Backup Power System

MonoLith™ Hypersonic
Power System

Mission-Critical Backup Power for Advanced Hypersonic Propulsion

Mission Specifications
8.8 kWh
ENERGY
ON-TIME DELIVERY
403V
MAX
40 kW
PULSE

Performance Specifications

Hover over any specification to explore its performance envelope.

ENERGY
8.8kWh

Total usable energy for mission-critical backup power

NOMINAL VOLTAGE
345.6VDC

Nominal bus voltage for vehicle power architecture

MAX VOLTAGE
403.2VDC

Peak voltage under full charge conditions

CONTINUOUS POWER
30.2kW

Sustained discharge power output for backup operations

PULSE POWER
40kW

Peak pulse discharge for transient load demands

ENERGY DENSITY
115Wh/kg

Gravimetric energy density including enclosure and cooling interface

CAPACITY
25.2Ah

Total amp-hour capacity at nominal discharge rate

MASS
77.4kg

Complete system mass including enclosure and thermal interface

Complete Spec Sheet

Full electrical and environmental specifications.

Voltage min240 VDC
Voltage nominal345.6 VDC
Voltage max403.2 VDC
Capacity25.2 Ah
Energy8.8 kWh
Approx mass77.4 kg
Discharge power continuous30.2 kW
Discharge power pulse40.0 kW
Energy density115 Wh/kg
Discharge temp-40 to +60°C
Charge temp0 to +45°C

Program Context

What makes this program unique.

Previous Supplier Failed

Brought in after the original battery supplier could not meet program specifications, with the program already behind schedule, EBS delivered on time.

Kerosene-Cooled Integration

The pack integrates into the vehicle’s kerosene thermal management system, where the same fuel used for hypersonic propulsion cools the battery pack, requiring precise thermal interface engineering.

Mission Override Capability

The system includes a mission override feature allowing operation beyond normal protective limits when mission continuation requires it, a requirement unique to critical aerospace programs.

System Architecture

Designed for direct integration into a kerosene-cooled hypersonic vehicle.

External PDU

  • Power distribution unit is external to the pack
  • Defined interface for vehicle integration
  • Clean separation of power routing and storage

Fuel-Cooled Thermal Architecture

  • Thermal management integrated into vehicle kerosene circuit
  • No separate cooling system required
  • Precise thermal interface engineering for fuel-as-coolant

Mission Override

  • System can be commanded beyond normal BMS protective limits
  • Mission-critical continuation capability
  • Aerospace-specific requirement engineered to specification
MonoLith Hypersonic Battery System

Program Outcome

UNITS
1 → 3
Built first article, customer ordered two additional units
SCHEDULE
ON TIME
Delivered on aggressive schedule after prior supplier failure
CAPABILITY
OVERRIDE
Mission override feature delivered to specification
The program was behind schedule before we were contacted. The previous supplier had failed to deliver. We built the first unit on an aggressive timeline, integrated it into a kerosene-cooled thermal architecture unlike anything in our prior work, and delivered on time. They ordered two more.
EBS
EVolve Battery Systems
Colorado, USA

Why It Matters

Called In After Supplier Failure

When the original supplier couldn’t deliver, this program needed a responsive, technically capable replacement. We delivered on time on a compressed schedule.

Fuel-Cooled Battery Integration

The pack interfaces directly with the vehicle’s kerosene thermal circuit, requiring thermal engineering beyond standard liquid cooling, a capability no catalog supplier offers.

Mission Override to Aerospace Spec

The ability to command a battery system beyond its protective limits for mission continuation is a rare, program-specific requirement we engineered and delivered.

Working on an advanced propulsion or aerospace program?

We build mission-critical battery systems for programs where the previous supplier couldn’t deliver. Responsive, technically capable, on schedule.

EBS
EVolve Battery Systems
Engineered and Assembled in Colorado, USA