A battery is a cup, tank, or part of a container or composite containing an electrolyte solution and metal electrodes to generate an electric current.With advances in technology, batteries are generally small devices that produce electricity.Such as solar cells.The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance.
(1) open circuit voltage of the battery
(2) internal resistance of the battery
(3) working voltage of the battery
(4) charging voltage
Charging voltage refers to the voltage at both ends of the battery when the secondary battery is charged.The basic methods of charging include constant current charging and constant voltage charging.Constant current charging is generally adopted, which is characterized by constant charging current in the process of charging.With the progress of charging, the active substances are restored, the electrode reaction area is continuously reduced, and the polarization of the motor is gradually increased.
(5) battery capacity
Battery capacity refers to the amount of electricity obtained from the battery, commonly used C, unit commonly used Ah or mAh.Capacity is an important index of battery performance.Battery capacity is usually divided into theoretical capacity, practical capacity and rated capacity.
The capacity of the battery is determined by the capacity of the electrode. If the capacity of the electrode is unequal, the capacity of the battery depends on the electrode with a small capacity, but it is never the sum of the positive and negative capacities.
(6) storage performance and life of the battery
One of the main characteristics of chemical power supply is that it can release electrical energy when in use and store electrical energy when not in use.The so-called storage capability for secondary batteries is the ability to retain charge.For secondary batteries, service life is an important parameter to evaluate the performance of the battery.Secondary battery after a charge and discharge, known as a cycle (or a cycle).Under a certain charging and discharging system, the number of charging and discharging that the battery can undergo before the battery capacity reaches a certain specified value is called the service cycle of the second battery.