What is lithium battery wireless charging technology? -Lithium - Ion Battery Equipment
Wireless lithium-ion battery charging technology is a technology that uses magnets to charge devices without the use of wires at all. Wireless charging technology, derived from wireless power transmission technology, uses magnetic resonance to transmit charges in the air between the charger and the device, and coils and capacitors form resonance between the charger and the device to achieve efficient power transmission technology.
Wireless charging is mainly divided into static and dynamic. Static means that electric vehicles can be charged after parking in a parking space. Dynamic means that in the future, the car can be towed on the highway to realize charging while walking. At present, the closest to mass production is the static wireless charging technology. The charging efficiency can reach up to 95.4%. This is the highest efficiency that can be achieved in the laboratory, and the minimum is not less than 85%. Therefore, the charging efficiency is basically comparable to that of line charging. The dynamic wireless charging is probably expected to be industrialized in three to five years.(Lithium - Ion Battery Equipment)
There are mainly three basic principles of wireless charging technology: electromagnetic induction, magnetic field resonance and radio wave.
The electromagnetic induction type is mainly to use the principle of electromagnetic induction to generate a certain current on the secondary coil through the alternating current of a certain frequency on the primary coil, so as to transfer the energy from the transmission end to the receiving end. At present, the most common battery charging solution uses electromagnetic induction. In fact, the electromagnetic induction solution does not have much mystery in terms of technical realization. The local BYD company in my country applied for the non-contact induction as early as December 2005. Type charger patent, the use of electromagnetic induction technology.
The principle of magnetic resonance is to adjust the energy sending device and the energy receiving device to the same frequency, or to resonate at a specific frequency, and they can exchange energy with each other. The coil used in this experiment has a diameter of 50 cm, which cannot be commercialized yet. If the size of the coil is to be reduced, the received power will naturally decrease.
Radio wave charging technology is a relatively mature technology at present. Similar to the ore radios used in the early days, it is mainly composed of a microwave transmitter and a microwave receiver, which can capture the radio wave energy bouncing off the wall, and maintain a stable DC voltage while adjusting with the load. This method requires only a transmitter installed on the wall plug, and a mosquito receiver that can be installed on any low voltage product.