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A wireless charging system charging method based on load identification technology

A technology of wireless charging and load identification, applied in secondary battery charging/discharging, battery circuit devices, current collectors, etc., can solve problems such as battery damage, system charging mode cannot be switched, and achieve the effect of avoiding information interaction

Active Publication Date: 2019-12-06
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a battery whose nominal voltage is inconsistent with the voltage output by the system in the CV stage is connected to the system, it will cause the problem that the charging mode of the system cannot be switched. At the same time, because the charging current that different batteries can withstand is inconsistent, different types of batteries Connecting to the system can also cause damage to the battery itself

Method used

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  • A wireless charging system charging method based on load identification technology
  • A wireless charging system charging method based on load identification technology
  • A wireless charging system charging method based on load identification technology

Examples

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, the present invention will be further described:

[0034] The block diagram of the wireless charging system involved in the present invention is as follows figure 1 As shown, the circuit structure of the system includes a high-frequency inverter power supply, a primary-side compensation circuit, a primary-side control circuit, a secondary-side switch circuit, a rectifying and stabilizing circuit, and a secondary-side control circuit.

[0035] combine figure 2 The schematic diagram of the circuit, the high-frequency inverter power supply provides high-frequency power for the system, and the effective value of the power supply voltage is U in , the supply voltage frequency is f. The primary side circuit is compensated by the inductance L X , compensation capacitor C p The LCL resonant circuit composed of the transmitting coil; the inductance of the transmitting coil is L p ; The primary side control circuit includes a ...

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Abstract

The invention discloses a wireless charging system charging method based on a load identification technology. The method comprises control on a primary side and control on a secondary side; the control on the primary side comprises controlling the amplitude of output voltage of a voltage source by collecting voltage at two ends of a compensation capacitor on the primary side in a wireless charging system; the control on the secondary side comprises controlling switching-on and switching-off of all switches on the secondary side by collecting battery charging voltage and charging current so as to realize conversion of system charging modes. Under the premise of no communication module between the primary side of the wireless charging system and the secondary side of the wireless charging system, illegal battery load is identified, and protection for the system is completed by adjusting the amplitude of input voltage on the primary side and controlling the states of all the switches on the secondary side.

Description

technical field [0001] The invention relates to the field of wireless charging of batteries, in particular to a charging method for a wireless charging system based on load identification technology. Background technique [0002] Wireless power transmission technology has many advantages that traditional wired transmission methods do not have. Using wireless to charge small portable devices such as mobile phones can greatly improve the flexibility and comfort of use, and no longer need to carry redundant power supplies. Wire. Often, the transmission and storage of electric energy are equally important. Therefore, while relying on wireless power transmission technology to solve the problem of energy transmission, it is also necessary to solve the problem of efficient energy storage. At present, the common energy storage devices around us are batteries, especially lithium batteries. For lithium batteries, constant current (CC) and constant voltage (CV) charging are the most c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/44H02J50/12
CPCH01M10/44H02J7/00045H02J7/025H02J7/027Y02E60/10
Inventor 黄学良潘书磊谭林林刘瀚
Owner SOUTHEAST UNIV
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