Battery Impedance And Charge Discharge Rate

Impedance
The battery has a large electrode electrolyte interface area, so it can be equivalent to a series circuit with large capacitance, small resistance and inductance. But the actual situation is much more complicated, especially the battery impedance changes with time and DC level, and the measured impedance is only valid for specific measurement state.
Charge discharge rate
There are two ways to express time ratio and multiplying ratio. The hourly rate is the charging and discharging rate expressed by the charging and discharging time, which is equal to the number of hours obtained by dividing the rated capacity (ampere hour) of the battery by the specified charging and discharging current (ampere hour). Multiplication is another representation of charge discharge rate, and its value is the reciprocal of time rate. The discharge rate of the primary battery is expressed by the time from discharging through a fixed resistance to the termination voltage. The discharge rate has a great influence on the battery performance.
Life
The storage life refers to the maximum allowable storage time from the time when the battery is made to the time when it is put into use, in years. The total period, including storage period and service life, is called the validity period of the battery. The battery life can be divided into dry storage life and wet storage life. The cycle life is the maximum number of charging and discharging cycles that the battery can achieve under the specified conditions. When specifying the cycle life, the charge discharge cycle test system must be specified at the same time, including charge discharge rate, discharge depth and ambient temperature range.
Self discharge rate
The rate at which battery capacity is lost during storage. It is expressed as the percentage of the capacity lost by self discharge in unit storage time to the capacity before storage.