HOW DOES A LİTHİUM BATTERY WORK?

29 Şubat 2024

Anode: The electrode where oxidation occurs in an electrochemical cell.

Cathode: The electrode where reduction occurs in an electrochemical cell.

Active Material: The name given to the chemical species that undergo electrochemical reactions inside a battery.

Electrolyte: The medium that provides ionic conductivity between the positive and negative electrodes in a cell.

CYCLE COUNT:

Defined as the number of times a battery can be charged and discharged in usable condition.

THEORETICAL VOLTAGE:

Expressed as the difference in standard potentials of species inside the cell.

THEORETICAL CAPACITY:

The amount of energy a cell can deliver within 1 hour after being charged.

It is given in units of ampere-hours.

ENERGY DENSITY

Energy Density refers to the amount of electrical energy that can be stored per unit weight or volume of a battery.

CHARGE EFFICIENCY

Charge Efficiency is defined as the ratio of the energy drawn from a fully charged battery until fully discharged to the energy supplied to the battery for full recharging.

DEPTH OF DISCHARGE (DoD)

Depth of Discharge is the rate of discharge of a battery from 100% fully charged to 0% fully discharged.

80% DoD means discharging the battery to 80% of its capacity as expressed in Ah.

STATE OF CHARGE (SoC)

State of Charge indicates the percentage of fullness of a battery. Usually, the relationship between the voltage at the battery terminals and the SoC value varies depending on the battery technology.

CYCLE LIFE

A "cycle" is defined as discharging a battery to a certain DoD level and then fully recharging it.

The "cycle life" of a battery is equal to the number of times it can be cycled to approximately 80% DoD and then charged back to full.

C-RATE

Discharge rate is also described by the C-rate (Capacity Rate).

The 1C expression represents the current value that can completely discharge the capacity of a battery in 1 hour.

Our batteries are continuously discharged at 1C.

They can provide 2C instantaneously.

The operation of lithium batteries requires an electric current passing through the battery from both ends. When an electric current is applied, positively and negatively charged lithium ions in the liquid electrolyte move between the anode and cathode. During this process, stored electrical energy is transferred from the battery and delivered to the equipment that requires it. Thus, depending on the power density of the battery, the device can perform all its functions.