The area of a cup, trough, or other container or composite container containing electrolyte solutions and metal electrodes to generate current. With the development of science and technology, batteries generally refer to small devices that can generate electricity. Such as solar cells. The performance parameters of 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 secondary battery when the external power supply is added to the battery. The basic methods of charging are constant current charging and constant voltage charging. Constant current charging is generally adopted, which is characterized by constant charging current during the charging process. With the charging process, the active material is recovered, 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, which is commonly expressed as C, and the unit is commonly expressed as Ah or mAh. Capacity is an important indicator of battery electrical performance. The capacity of battery 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 different, the capacity of the battery depends on the electrode with small capacity, but it is by no means the sum of the capacity of the positive and negative electrodes.
(6) storage performance and service life of the battery
One of the main characteristics of chemical power supply is that it can release electric energy when in use and store electric energy when not in use. The so-called storage performance for secondary batteries is the ability to maintain charging. For secondary batteries, the service life of the battery is an important parameter to measure the performance of the battery. Secondary batteries undergo a charge and discharge called a cycle (or a cycle). Under a certain charging and discharging system, the number of charging and discharging times that the battery can withstand before the battery capacity reaches a certain specified value is called the service cycle of the secondary battery.