What is the nominal voltage?

The nominal voltage of the battery refers to the voltage displayed during normal operation. The nominal voltage of the secondary nickel-cadmium nickel-hydrogen battery is 1.2V; the nominal voltage of the secondary lithium battery is 3.6V.

What is open circuit voltage?

The open circuit voltage refers to the potential difference between the positive and negative electrodes of the battery when the battery is in a non-working state, that is, when there is no current flowing through the circuit. The working voltage, also known as the terminal voltage, refers to the potential difference between the positive and negative electrodes of the battery when the battery is in working state, that is, when there is current in the circuit..

What is the capacity of the battery?

The capacity of the battery is divided into the rated capacity and the actual capacity. The rated capacity of the battery refers to the design and manufacture of the battery that stipulates or guarantees that the battery should discharge the minimum amount of electricity under certain discharge conditions. The IEC standard stipulates that nickel-cadmium and nickel-metal hydride batteries are charged at 0.1C for 16 hours and then discharged to 1.0V at 0.2C under the environment of 20℃±5℃. The rated capacity of the battery is expressed as C5. For lithium- ion batteries, it is stipulated that they are charged for 3 hours under the charging conditions controlled by normal temperature, constant current (1C)-constant voltage (4.2V), and then the power released when discharged from 0.2C to 2.75V is its rated capacity. The actual capacity of the battery refers to the actual power released by the battery under certain discharge conditions, which is mainly affected by the discharge rate and temperature (so strictly speaking, the battery capacity should specify the charge and discharge conditions). The unit of battery capacity is Ah, mAh (1Ah=1000mAh).

What are the main aspects of the performance of the secondary battery?

Mainly include voltage, internal resistance, capacity, energy density, internal pressure, self-discharge rate, cycle life, sealing performance, safety performance, storage performance, appearance, etc., and others include overcharge, overdischarge, corrosion resistance, etc.

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