Block diagram of a typical battery
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| Block diagram of typical battery |
Block diagram of a typical battery
Figure shows a
simplified block diagram of a typical battery pack. It consists of
the main battery cell and an equivalent series resistance (ESR).
The internal impedance of a battery is dependent on the specific
battery’s size, chemical properties, age, temperature and
the discharge current. Hence, the voltage measured at the terminals
of the battery is the sum of the voltage drop across the ESR and
the battery cell voltage. Given the sensitivity of this Li-ion and
Li-polymer batteries, battery packs are required to include
protection circuitry to prevent runaway events. These safety
electronics ensure that the cell is not exposed to
over-/under-voltage and/or over-current situations.
