Electricity is the amount of electrical energy required by electrical equipment, also known as electrical energy or electrical power, the unit of electrical energy is kilowatt-hours (kW-h), also known as the number of electrical degrees, W = P * t.

1、Electricity consumption of electrical appliances (kWh) = total power consumption (W) * power consumption time (H) / 1000.

2, battery power (WH) = battery voltage (V) * battery capacity (AH).

3, battery power (WH) = battery voltage (V) * battery capacity (mAH) / 1000.

9*0.8=7.2w=0.0072KW,one hour power consumption 0.0072 degrees.

9*1=9w=0.009KW, one hour power consumption 0.009 degrees.

So the total power consumption in 24 hours (0.0072+0.009)*24=0.388 degrees.

Battery capacity is one of the important performance indicators to measure the performance of the battery, it indicates that under certain conditions (discharge rate, temperature, termination voltage, etc.) the battery discharge power (available JS-150D to do discharge test), that is, the capacity of the battery, usually in ampere-hour unit (abbreviated, expressed as A-H, 1A-h = 3600C).

Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions. The formula for calculating battery capacity C is C=∫t0It1dt (integration of current I in the time from t0 to t1), and the battery is divided into positive and negative poles.

Expanded information

Common Battery

Dry Battery

Dry cell battery is also called manganese zinc battery, the so-called dry cell is relative to the voltage-type battery, the so-called manganese zinc refers to its raw materials. For dry cell batteries made of other materials such as silver oxide and nickel cadmium batteries, the voltage of manganese zinc batteries is 15V. The voltage of manganese-zinc battery is 15 V. The dry cell is a chemical material consumed to produce electricity. Its voltage is not high and the continuous current it can produce cannot exceed 1 amp.

Lead battery

The battery is one of the most widely used batteries. A glass or plastic tank is used, filled with sulfuric acid, and two lead plates are inserted, one connected to the positive terminal of the charger and one connected to the negative terminal of the charger, and a battery is formed after a dozen hours of charging. It has a voltage of 2 volts between the positive and negative terminals. The advantage of the battery is that it can be used repeatedly. In addition, it can provide a large current because of its extremely low internal resistance. Using it to power the car’s engine, the instantaneous current can reach more than 20 amps. The battery stores electrical energy when it is charged and converts chemical energy into electrical energy when it is discharged.

Lithium battery

A battery with lithium as the negative electrode. It is a new type of high-energy battery developed after the 1960s. They are classified according to the different electrolytes used.

1. Lithium batteries with high-temperature molten salt.
2.  organic electrolyte lithium batteries.
3. Inorganic non-aqueous electrolyte lithium batteries.
4. Solid electrolyte lithium batteries.
5. Lithium water battery.

The advantages of lithium battery are high voltage of single cell, high specific energy, long storage life (up to 10 years), good high and low temperature performance, can be used in -40 ~ 150 ℃. Disadvantages are expensive, security is not high. In addition, the voltage lag and safety issues are yet to be improved. Vigorous development of power batteries and the emergence of new cathode materials, especially the development of lithium iron phosphate materials, the development of lithium power has helped a lot.

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