PART ONE: Lithium-ion battery fast charging technology
Lithium-ion battery fast charging technology refers to increasing the charging voltage and charging current of the charger so that the battery can be charged quickly.
For example, in cell phones and notebooks, ordinary charging technology generally uses 0.5C charging current (1C current here is interpreted as 1 times the current of the battery capacity, such as 2600mAh battery, 1 times the current of the battery capacity is equal to 2600mA, then 1 hour can be full), which can only fill 25% of the power in 30 minutes, while fast charging technology currently uses 1.2 C to 1.8 C charging current, can achieve 60% to 80% of the power within 30 minutes.
PART TWO: Batteries can accept higher charging currents
Such fast charging technology reflects the obvious advantages of lithium-ion batteries, mainly in the following areas: first of all, high energy density, if the electrical energy capacity is the same, lithium-ion batteries are smaller, lighter, more portable, and thin; secondly, the open-circuit voltage of lithium-ion batteries is also higher than other positive ion batteries, the use of longer; finally, lithium-ion batteries can be charged with high current, this feature for fast This feature provides the possibility of fast charging.
In addition, commonly used lithium-ion batteries without memory effect, the battery does not need to discharge the remaining charge before charging, can be charged at any time, the use of maintenance is simple and easy.
The technical key to achieving fast charging of lithium-ion batteries is: the battery can accept a large charging current, which requires the battery itself to be small enough for polarization resistance; after the battery receives high current charging, the battery can still ensure the life and safety, which requires the battery material to be stable enough.
PART THREE: Lithium-ion batteries are widely used
Lithium-ion batteries are widely used because of their high energy density, long cycle life, no memory effect, green environmental protection, etc., which are manifested in the following aspects:
1, fast-charging lithium-ion batteries in the field of cell phones will be important applications. Lithium-ion batteries are commonly used in smartphones, but due to the high power consumption of smartphones long charging time of cell phone batteries, which restricts the use and development of smartphones, lithium-ion batteries with fast charging capability will make up for this defect, improve the charging speed of cell phone batteries to meet the use of smartphones.
2, in the vehicle equipment, the application of lithium-ion batteries has also become an important development direction. Fast-charging lithium-ion batteries not only solve the problem of charging the vehicle battery but also improve the charging efficiency of lithium-ion batteries, to improve the power supply capacity of vehicle equipment, to meet the normal use of vehicle equipment has an important role.
3, charging cell phones to a wide variety of mobile charging devices. In this field, fast-charging lithium-ion batteries can not only quickly charge mobile charging devices but also improve the functionality of mobile charging devices, which has an important role in promoting the development of mobile charging devices.