What is the difference between battery capacity and rated capacity?

Difference: 1. Battery capacity is one of the important performance indicators to measure battery performance. It indicates the amount of electricity released by the battery under certain conditions, that is, the capacity of the battery, usually in ampere hours; the rated capacity is Refers to the long-term continuous working capacity of the motor or electrical appliance indicated on the nameplate under rated working conditions. 2. Battery capacity includes rated capacity. Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions.

The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

Battery capacity

Battery capacity is one of the important performance indicators to measure battery performance. It indicates that under certain conditions (discharge rate, temperature , termination voltage, etc.) The amount of electricity released by the battery (JS-150D can be used for discharge testing), that is, the capacity of the battery, usually in Ampere hours (abbreviated, expressed in A·H, 1A·h=3600C).

Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions. The calculation formula of battery capacity C is C=∫t0It1dt (integrate the current I from t0 to t1). The battery is divided into positive and negative. pole.

Battery capacity is generally calculated in AH (ampere hours), and the other is calculated in watts (W) of CELL (unit plate). (W/CELL)

　1. Calculation of Ah (ampere hours), discharge current (constant current) I×discharge time (hours) T. For example, if a 7AH battery has a continuous discharge current of 0.35A, it can last for 20 hours.

　2. The charging time is based on 15 hours, and the charging current is 1/10 of the battery capacity. Fast charging will reduce battery life.

Battery capacity refers to the amount of electricity stored in the battery. The unit of battery capacity is "mAh", and the Chinese name is milliamp-hour (when measuring large-capacity batteries such as lead-acid batteries, for convenience, it is generally expressed by "Ah", the Chinese name is ampere-hour, 1Ah=1000mAh). If the rated capacity of the battery is 1300mAh, that is, 130mA current discharges the battery, then the battery can continue to work for 10 hours (1300mAh/130mA=10h); if the discharge current is 1300mA, the power supply time is only about 1 hour (actual working time There are some differences due to individual differences in the actual capacity of the battery). This is an analysis under ideal conditions. The actual current of a digital device cannot always be constant at a certain value (taking a digital camera as an example, the operating current will vary greatly due to the opening or closing of components such as LCD displays and flashlights). changes), so the time the battery can power a certain device can only be an approximate value, and this value can only be estimated through actual operating experience.

Rated capacity

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 under rated working conditions. Usually it refers to apparent power for transformers, active power for motors, and apparent power or reactive power for phase modulation equipment. The units are VA, kVA, and MVA.

Rated capacity refers to the customary value of apparent power under main tap. For example, the capacity specified on the transformer nameplate is the rated capacity, which means that the tap changer is located at the main tap and is the product of the rated no-load voltage, rated current and the corresponding phase coefficient. For three-phase transformers, rated capacity = rated no-load line voltage × rated line current, and rated capacity is generally expressed in kVA or MVA. The rated capacity is the maximum capacity that can be continuously output during the entire specified normal service life, such as 30 years. The actual output capacity is the product of the voltage with load (in the case of inductive load, the voltage with load is less than the rated no-load voltage), the rated current and the corresponding coefficient.

The difference between battery capacity and rated capacity

1. Battery capacity is one of the important performance indicators to measure battery performance. It indicates that at a certain The amount of electricity discharged by the battery under certain conditions, that is, the capacity of the battery, is usually measured in Ampere hours. Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions. Battery capacity refers to the amount of power stored in the battery.

2. 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 under rated working conditions. Usually, it refers to the apparent power of the transformer, the active power of the motor, and the apparent power or reactive power of the phase modulation equipment. The apparent power of the transformer refers to the total power transmitted by the transformer. The active power and reactive power are based on the characteristics of the load. Changed, the unit of apparent power is VA (Volt-Ampere), active power is W (Watt), and reactive power is Var (Var).

3. Rated capacity refers to the customary value of apparent power under main tap. For example, the capacity specified on the transformer nameplate is the rated capacity, which means that the tap changer is located at the main tap and is the product of the rated no-load voltage, rated current and the corresponding phase coefficient.

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