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Calcimator

Battery Thermal Management Calculator

Calculate cooling requirements for a battery pack.

Inputs

kWh
kW
mΩ
V
°F
°F

Results

Heat Generation

195 W

≈ 20 LED bulbs

Cooling Required

0.2 kW

≈ 3 laptops

Air Flow (if air-cooled)34,315 CFM
Liquid Flow (if liquid)0.3 L/min
Discharge Current63 A
How to Use This Calculator
  1. Enter Pack Energy, Discharge Power, and Pack Internal Resistance.
  2. Set Pack Voltage, Ambient Temperature, and Max Battery Temp.
  3. Review Heat Generation (W) and Cooling Required (kW).
  4. Use Air Flow (if air-cooled) (CFM) and Liquid Flow (if liquid) (L/min) to inform your decision.

How the result changes with Pack Voltage

Pack VoltageHeat GenerationCooling Required
913,774 W3.77 kW
288377 W0.38 kW
524114 W0.11 kW
72160 W0.06 kW

What each input means

Pack Energy
Total battery pack energy capacity.
Discharge Power
Continuous discharge power.
Pack Internal Resistance
Total pack internal resistance in milliohms.
Pack Voltage
Nominal battery pack voltage.
Ambient Temperature
Maximum ambient temperature.
Max Battery Temp
Maximum allowable battery temperature.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Pack Energy = 50, Discharge Power = 25, Pack Internal Resistance = 50, Pack Voltage = 400 = 6 input(s) provided
  2. Calculate Heat Generation
    Heat Generation
    195 = 195
  3. Calculate Cooling Required
    Cooling Required
    0.2 = 0.2
  4. Calculate Air Flow
    Air Flow
    34315 = 34315
  5. Calculate Liquid Flow
    Liquid Flow
    0.3 = 0.3

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