Satellite Battery Pack Simulator
BETAConfigure your satellite mission parameters, get an optimised LG MJ1-based battery pack recommendation, then simulate charge/discharge cycles and long-term capacity degradation over the full mission lifetime.
Quick-start presets
Typical 1U CubeSat ≈ 1.0–1.4 kg
= 2.0 years
Nominal cell voltage 3.635 V · nS auto-calculated from bus voltage
⚠ Values below 70% may result in premature mission loss
Enable micro-charge regime
Limits SoC to a configurable window. Reduces usable capacity but significantly extends cycle life for oversized packs.
Usable window: 70% of pack capacity per orbit
Cell failure simulation (advanced — off by default)
One parallel string fails at the chosen month — e.g. 3S2P → 3S1P. The pack instantly loses that string's capacity share; surviving strings then operate at a higher DOD and degrade faster.
A short circuit triggers BMS isolation — effectively equivalent to string removal.
Computing orbits…
Adjust Battery Pack
Recommended Battery Pack
Orbit & Eclipse
Single-Orbit Charge Profile
SoC during one representative orbit (eclipse centre at 50% timeline)
Capacity Degradation Timeline
Remaining capacity vs mission time. Red zone = mission critical.
State of Charge Envelope
Monthly min/max SoC showing the operating DOD window over the mission.
DOD vs Cycle Life — LG MJ1
Your operating DOD is shown as a ● indicator. Lower DOD = exponentially more cycles.
⚡ Micro-charge regime
Operating within a restricted SoC window (e.g. 20–80%, configurable in Step 3) avoids fully charging or discharging the cells, mimicking mission-proven spacecraft battery protocols. This can extend cycle life by up to 2× compared to 0–100% cycling, at the cost of using only the configured window of nominal capacity per cycle.
Simulation Results
💡 Recommendation
Ready to fly a real tested pack?
The DIOO battery pack is engineered for exactly these mission profiles — with flight-heritage Li-ion cells, passive thermal management and built-in BMS protection.
Battery Science Explained
What is DOD?
Depth of Discharge is the percentage of a battery's capacity used in one cycle. Using only 50% of capacity (DOD = 50%) can more than double the number of charge-discharge cycles compared to full 0–100% cycling.
Why micro-charges help
If your pack is oversized for mission power needs, the satellite uses only a fraction each orbit. This shallow cycling — sometimes called a micro-charge regime — is one of the most effective ways to extend battery life in space missions.
Temperature effects
Li-ion cells degrade faster at both high temperatures (>40 °C) and low temperatures (<0 °C). Cold temperatures also temporarily reduce capacity. Thermal design of the satellite is as important as the battery pack selection.
Series vs Parallel
Adding cells in series (nS) raises voltage. Adding cells in parallel (mP) raises capacity. Parallel adds redundancy — losing one string in a 3P pack only reduces capacity by 33%, keeping the mission running.