What is the difference between a 18650 power lithium battery and an ordinary 18650 lithium battery?

The 18650 power battery supports large current discharge, which may reach a current of 20 times capacity. The 18650 ordinary lithium battery only supports a discharge of 1 times capacity, that is, an ordinary 2600mAh ordinary battery with a maximum discharge current of 2600mA.

The 18650 power battery capacity is generally about twice as small as the ordinary battery capacity. It is estimated that it will not exceed 2000 mAh at most. Generally in the appearance of 1000 mAh ~ 1800 mAh.

The operating voltage of a general power battery is lower than that of an ordinary lithium battery. The maximum charging voltage of an ordinary lithium battery is 4.2 V, and the maximum charging voltage of a power lithium battery is about 3.65 V. The nominal voltage of an ordinary lithium battery is 3.7 V, and the nominal voltage of a power lithium battery is 3.2 V.

The positive and negative material particles of the 18650 dynamic lithium battery are smaller than those of the ordinary 18650 lithium battery(increasing the surface area and accelerating the chemical reaction rate), and the diaphragm material and electrolyte used are better conductive properties.

2, 18650 power lithium batteries in the positive and negative pole lead to more than the ordinary 18650 lithium battery(reduce the resistance in the polar ear and meet greater current).

3, 18650 power cells support large current discharges, which may reach a current of 20 times capacity. 18650 ordinary lithium batteries only support 1 times the discharge capacity.

4, 18650 power battery capacity is generally about twice as small as the average 18650 lithium battery capacity.

5, the maximum charging voltage of ordinary lithium batteries is 4.2 V, and the maximum charging voltage of power lithium batteries is about 3.65 V. The nominal voltage of an ordinary lithium battery is 3.7 V, and the nominal voltage of a power lithium battery is 3.2 V. "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by GilbertN. Lewis. In the 1970s, M.S. Whittingham proposed and began to study lithium ion batteries. Due to the very lively chemical properties of lithium metals, the processing, preservation, and use of lithium metals require very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become the mainstream.

Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and can be charged. The fifth-generation lithium metal battery of rechargeable batteries was born in 1996, and its safety, specific capacity, self-discharge rate and performance price are better than those of lithium-ion batteries. Due to its own high-tech requirements, companies in only a few countries are now producing this lithium metal battery.

The positive and negative material particles of the 18650 dynamic lithium battery are smaller than those of the ordinary 18650 lithium battery(increasing the surface area and accelerating the chemical reaction rate), and the diaphragm material and electrolyte used are better conductive properties.

2, 18650 power lithium batteries in the positive and negative pole lead to more than the ordinary 18650 lithium battery(reduce the resistance in the polar ear and meet greater current).

3, 18650 power cells support large current discharges, which may reach a current of 20 times capacity. 18650 ordinary lithium batteries only support 1 times the discharge capacity.

4, 18650 power battery capacity is generally about twice as small as the average 18650 lithium battery capacity.

5, the maximum charging voltage of ordinary lithium batteries is 4.2 V, and the maximum charging voltage of power lithium batteries is about 3.65 V. The nominal voltage of an ordinary lithium battery is 3.7 V, and the nominal voltage of a power lithium battery is 3.2 V.

"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution. In 1912, the lithium metal battery was first proposed and studied by GilbertN. Lewis. In the 1970s, M.S. Whittingham proposed and began to study lithium ion batteries. Due to the very lively chemical properties of lithium metals, the processing, preservation, and use of lithium metals require very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become the mainstream.

Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries do not contain metallic lithium and can be charged. The fifth-generation lithium metal battery of rechargeable batteries was born in 1996, and its safety, specific capacity, self-discharge rate and performance price are better than those of lithium-ion batteries. Due to its own high-tech requirements, companies in only a few countries are now producing this lithium metal battery.

The 18650 is the originator of the lithium ion battery -- a standard lithium ion battery model set by the Japanese SONY company in order to save costs, of which 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery.

Common 18650 batteries are divided into lithium ion batteries and lithium iron phosphate batteries. The lithium ion battery voltage is a nominal voltage of 3.7 V, the charging cut-off voltage is 4.2 V, the lithium iron phosphate battery has a nominal voltage of 3.2 V, the charging cut-off voltage is 3.6 V, the capacity is usually 1200 mAh-3350 mAh, and the common capacity is 2200mAh-2600mAh.

Lithium battery (Li-ion, Lithium Ion Battery): Lithium-ion battery has the advantages of light weight, large capacity, no memory effect, etc.

18650 lithium battery

18650 lithium battery

Commonly used-Most of the code devices use lithium-ion batteries for power, although their prices are relatively expensive. The energy density of lithium-ion batteries is very high. Its capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight, and it has a very low self-discharge rate. In addition, the almost no "memory effect" of lithium-ion batteries and the absence of toxic substances are also important reasons for its widespread use. Also note that the outside of the lithium battery is generally marked with 4.2 Vlithiumionbattery (lithium battery) or 4.2 V lithiumsecondarybattery (lithium secondary battery), 4.2 Vlithiumiumregengeablebattery (rechargeable lithium battery), so the user must see the appearance of the battery when purchasing the battery, the symbol, Prevent nickel-cadmium and nickel-hydrogen batteries from being mistaken for lithium batteries because they do not see the type of battery.

Lithium battery labels 3.7 V or 4.2 V are the same. It's just that the manufacturer's label is different. 3.7 V refers to the platform voltage(ie, typical voltage) discharged during battery use, while 4.2 V refers to the voltage at full charge. Common chargeable 18650 lithium batteries have voltages of standard 3.6 or 3.7 V. When charged, they are 4.2 V. This has little to do with the power(capacity). The mainstream capacity of the 18650 battery ranges from 1800 mAh to 2600 mAh.(18650 power battery capacity is more than 2200 ~ 2600 mAh), The mainstream capacity even has more than 3500 or 4000 mAh(remind everyone that it is possible to fake domestic power cores labeled 3350 mAH or more on the market. At present, the maximum capacity of domestic mass production is 3350 mAh. ).

It is generally considered that the lithium battery's no-load voltage is below 3.0V and it is considered that the power is used up (the specific value needs to look at the threshold of the battery protection board, such as low to 2.8V, also 3.2V). Most lithium battery discharges can not put the no-load voltage below 3.2V, otherwise excessive discharge will damage the battery (usually the lithium battery on the market is basically used with a protective plate, so over-discharge will also cause the protection board to detect to the battery, it is impossible to charge the battery). 4.2V is the highest limit voltage for battery charging. It is generally considered that charging the lithium battery's no-load voltage to 4.2V is considered to be full. During battery charging, the battery voltage gradually rises to 4.2V at 3.7V, and the lithium battery cannot be charged. Charge the no-load voltage to 4.2V or higher, otherwise it will damage the battery. This is the special place for lithium batteries.

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