﻿ Battery Heat Power Loss Calculator ﻿ # Battery Heat Power Loss Calculator  Note: The current or resistance value cannot be zero

 Enter the Current, I A (amperes) mA (milliamperes) µA (microamperes) Enter the Resistance, R: Ω (ohms) mΩ (milliohms)

Power loss in the form of heat:

This Battery heat power loss calculator calculates the power loss in the form of heat that a battery produces due to its internal resistance.

Every battery has some internal resistance due to a battery not being a perfect conductor and its inherent internal composition and makeup.

Current is the flow of electrons.

When the electrons pass through the internal resistance of the battery, there is friction and this produces heat.

This heat produces power loss in the circuit.

This power loss dissipated as heat is calculated according to the formula, PHEAT LOSS= I2R, where I is the current passing through the battery and R is the internal resistance of the battery.

This formula is originally obtained through the formula for power, which is, P= VI. Substituting into this equation ohm's law, the formula then becomes, P= (IR)I, which becomes, P= I2R.

The unit for power is watts.

Usually the internal resistance of a lithium ion battery is just a few milliohms. The best batteries will have the lowest internal resistance, as the lower the internal resistance, the less heat is generated, thus, the less power loss there is through heat dissipation due to the internal resistance.

Lithium ion batteries may have an internal resistance ranging from 5-30 milliohms.

Thus, for example, if there is 15mA passing through a battery with 5 milliohms, the battery will dissipate 0.000001125 watts of heat.

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