One of the 8 important parameters of lithium batteries battery capacity (Ah)
Conversion between capacitance and electric energy
AH is a unit used to measure the capacity of storage devices. Its scientific name is "ampere-hour," which means that the storage device can work continuously for 1 hour when the power supply current intensity is 1A. WH is a form of energy (electrical energy) equal to the battery voltage (V) multiplied by the battery's AH. This WH value is divided by 1000, resulting in KWH (degrees).
Conversion formula
1WH=V*AH 1 degree=1KWH=1WH/1000
For example, if a battery is 48V200ah, it means that the battery can store 48V*200ah=9.6KWh/1000=9.6 degrees of electricity.
Capacity (Capacity, unit: Ah)
Battery capacity is one of the important performance indicators for measuring battery performance. It indicates the amount of electricity discharged by the battery under certain conditions (discharge rate, temperature, termination voltage, etc.) (JS-150D can be used for discharge test), that is, the capacity of the battery.
The unit of battery capacity is generally "mAh" (milliampere-hour) or "Ah" (ampere-hour). It is usually measured in ampere-hours [abbreviated as A·H, 1A·h=1000mAh=3600C (coulomb)]
Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions
1. Actual capacity refers to the amount of electricity that a battery can provide under a certain discharge system (a certain degree, a certain current density and termination voltage). The actual capacity is generally not equal to the rated capacity, and it is directly related to temperature, humidity, charge and discharge rate, etc. In general, the actual capacity is slightly smaller than the rated capacity and sometimes even much smaller than the rated capacity;
2. Theoretical capacity refers to the amount of electricity given by all active substances participating in the battery reaction. That is, the capacity under the most ideal state;
3. Rated capacity refers to the capacity of the motor or electrical appliance indicated on the nameplate that can continue to work for a long time in underrated working conditions. Usually, it refers to apparent power for transformers, active power for motors, and apparent power or reactive power for phase-modulating equipment, with units of VA, kVA, and MVA;
The geometric dimensions, termination voltage, temperature, and discharge rate of the intermediate plates in the application will affect the battery capacity. For example, in the winter in the north, if you use a mobile phone outdoors, the battery capacity will drop rapidly.
Electric energy (unit: KW·h)
Electric energy is a form of energy. Electric energy is a physical quantity that indicates how much work the current does. Electric energy refers to the ability of electricity to do work in various forms (so it is sometimes called electric work).
Electric energy calculation formula: W = P (power)·t (time) = U·I·t (kilowatt-hour KW·h)
Electric energy unit: The unit of electric energy (unit of electricity) is "degree." Its scientific name is kilowatt-hour, and its symbol is kW·h. One kilowatt-hour (1kW·h) = one kilowatt-hour = 1000 watts (W) * 1 hour (h). It can be understood as the amount of electricity consumed by a battery with a power of one kilowatt in one hour.
