PhysSandbox
Classical MechanicsWaves & SoundElectricity & MagnetismOptics & LightGravity & OrbitsLabs
🌙Astronomy & The Sky🌡️Thermodynamics🌍Biophysics, Fluids & Geoscience📐Math Visualization🔧Engineering🧪Chemistry

More from Electricity & Magnetism

Other simulators in this category — or see all 56.

View category →
NewUniversity / research

Skin Effect

δ = √(2/(ωμσ)): AC current density vs depth in a conductor (1D exponential).

Launch Simulator
NewSchool

Eddy Current Tube

Magnet fall: dv/dt = g in air vs g − k v in copper pipe (toy drag model).

Launch Simulator
NewKids

Plasma Ball (Stylized)

Glass sphere, center electrode, streamers toward cursor — visual only.

Launch Simulator
NewSchool

PN Junction & Diode

Band cartoon and Shockley-style I(V); ideality, temperature, I₀ scale.

Launch Simulator
NewUniversity / research

Transmission Line & Γ

Load mismatch → reflection; standing-wave sketch and SWR from Z_L, Z₀.

Launch Simulator
NewUniversity / research

Phased Array

Uniform linear array factor vs steering phase and element spacing.

Launch Simulator
PhysSandbox

Interactive physics, chemistry, and engineering simulators for students, teachers, and curious minds.

Physics

  • Classical Mechanics
  • Waves & Sound
  • Electricity & Magnetism

Science

  • Optics & Light
  • Gravity & Orbits
  • Astronomy & The Sky

More

  • Thermodynamics
  • Biophysics, Fluids & Geoscience
  • Math Visualization
  • Engineering
  • Chemistry

© 2026 PhysSandbox. Free interactive science simulators.

PrivacyTermsContact
Home/Electricity & Magnetism/Battery Thevenin (SOC)

Battery Thevenin (SOC)

This interactive simulator explores Battery Thevenin (SOC) in Electricity & Magnetism. V_oc(SOC), R_int(SOC), Coulomb-counted SOC vs charge/discharge current; terminal voltage trace. Use the controls to change the scenario; watch the visualization and any graphs or readouts to connect the model with lectures, labs, and homework.

Who it's for: Best once you already know the basic definitions and want to build intuition. Typical context: Electricity & Magnetism.

Key terms

  • battery
  • thevenin
  • soc
  • battery thevenin model
  • electricity
  • magnetism

Live graphs

12 V pack (example)

50 Ah
15 A

Positive I discharges the pack; negative I charges it.

Measured values

SOC65.00%
V_oc(SOC)12.345V
R_int(SOC)23.55mΩ
V_terminal12.100V

How it works

First-order Thevenin equivalent with open-circuit voltage and internal resistance both depending on state-of-charge. Coulomb counting updates SOC from the applied current.

Key equations

V = Vₒ꜀(SOC) − I·R(SOC)

dSOC/dt = −I / (Ah·3600 s)