Battery coulomb counting trace
User-supplied measurements and assumptions; Piecewise-constant coulomb counting, with charging efficiency only; reject trace that leaves 0..rated capacity.
Battery characterization and storage ↗Battery characterization and storage calculators
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Calculators
Battery energy counting trace
User-supplied measurements and assumptions; Integrate interval voltage×signed current×hours; positive current is terminal energy into battery, not stored energy.
Battery characterization and storage ↗Battery round-trip efficiency test
User-supplied measurements and assumptions; Energy efficiency=delivered energy/charging energy; input and output must cover matching initial/final stored-energy boundaries.
Battery characterization and storage ↗Battery coulombic efficiency test
User-supplied measurements and assumptions; Coulombic efficiency=charge output/charge input; this differs from energy efficiency.
Battery characterization and storage ↗Battery internal resistance pulse test
User-supplied measurements and assumptions; Observed DC pulse Δvoltage/Δcurrent with discharge-positive current; test duration, temperature and SOC determine interpretation.
Battery characterization and storage ↗Battery cell voltage spread and outliers
User-supplied measurements and assumptions; Compare cell voltages within each supplied simultaneous observation using a user-selected deviation threshold; no fault diagnosis.
Battery characterization and storage ↗Battery nominal series-parallel candidate
User-supplied measurements and assumptions; Choose smallest series count meeting nominal voltage, then smallest parallel count meeting nominal energy; obey entered count limits.
Battery characterization and storage ↗Battery supplied fuse-current margins
User-supplied measurements and assumptions; Compare entered continuous/pulse duties with already-selected manufacturer curve allowances and conductor limit; no protection design approval.
Battery characterization and storage ↗Battery C-rate conversion
User-supplied measurements and assumptions; C-rate=current/rated Ah capacity; reciprocal is ideal duration with no taper or efficiency losses.
Battery characterization and storage ↗Battery usable-window energy
User-supplied measurements and assumptions; Integrate piecewise-linear terminal-voltage-versus-Ah curve over selected usable charge window; result is Wh, not voltage×percent shortcut.
Battery characterization and storage ↗Battery cycle equivalent count
User-supplied measurements and assumptions; Equivalent cycles=sum absolute charge+discharge throughput/(2×reference capacity); input must include both directions.
Battery characterization and storage ↗Battery depth-of-discharge histogram
User-supplied measurements and assumptions; Nonperiodic three-point rainflow on SOC turning points; histogram by cycle range (DOD), residual half cycles retained.
Battery characterization and storage ↗Battery observed-range linear fade fit
User-supplied measurements and assumptions; Least-squares linear measured-capacity trend; query limited to observed cycle range, no life extrapolation.
Battery characterization and storage ↗Battery supplied-rate storage fade
User-supplied measurements and assumptions; Sequential user-supplied linear loss fraction within each time/temperature bin, compounded between bins; no chemistry-specific learned model.
Battery characterization and storage ↗Battery thermal test heat balance
User-supplied measurements and assumptions; Lumped constant heat capacity and Newton cooling: C dθ/dt=P−Hθ; adiabatic branch when H=0.
Battery characterization and storage ↗Battery module cooling flow worksheet
User-supplied measurements and assumptions; Ideal steady coolant m_dot=heat/(cp×temperature rise); divide by density for volume rate.
Battery characterization and storage ↗Battery balancing duration
User-supplied measurements and assumptions; Charge difference divided by current×duty fraction; constant effective current, no voltage taper model.
Battery characterization and storage ↗Battery two-point self-discharge rate
User-supplied measurements and assumptions; Compare matching-condition charge measurements; linear average loss plus equivalent compound daily retention, not chemistry attribution.
Battery characterization and storage ↗Battery open-circuit voltage lookup
User-supplied measurements and assumptions; Interpolate the supplied monotonic chemistry/temperature-specific OCV curve; no extrapolation or load-voltage compensation.
Battery characterization and storage ↗Battery staged constant-current timing
User-supplied measurements and assumptions; Consume piecewise-constant charging stages in order until supplied required Ah is met; report unmet charge if schedule insufficient.
Battery characterization and storage ↗Battery threshold dispatch simulation
User-supplied measurements and assumptions; Explicit threshold dispatch without export: charge at low tariffs, discharge against load at high tariffs; respect power/storage/one-way efficiency, no optimization claim.
Battery characterization and storage ↗Battery arbitrage break-even spread
User-supplied measurements and assumptions; Per delivered kWh, purchased energy costs buy price/round-trip efficiency; add supplied cycle cost.
Battery characterization and storage ↗Battery no-recharge peak-shaving demand
User-supplied measurements and assumptions; No intra-window recharging: integrate load above target cap; efficiency adjusts storage energy, supplied power limit flags unmet peaks.
Battery characterization and storage ↗Battery replacement warranty tally
User-supplied measurements and assumptions; Subtract recorded usage from supplied warranty limits; does not determine contractual claim entitlement.
Battery characterization and storage ↗Battery transport inventory worksheet
User-supplied measurements and assumptions; Multiply supplied unit energies and quantities; report explicitly missing declarations/documents; no dangerous-goods classification or shipment approval.
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