US 12,136,831 B2
Laser wireless power transmission device and method based on power acquisition on power lines
Xuan Zhao, Jiangsu (CN); Yang Liu, Jiangsu (CN); Yanjun Jiao, Jiangsu (CN); Yongqiang Wang, Jiangsu (CN); Meng Zhang, Jiangsu (CN); Honghua Xu, Jiangsu (CN); Chong Peng, Jiangsu (CN); Huan Zhang, Jiangsu (CN); and Jian Yang, Jiangsu (CN)
Assigned to State Grid Jiangsu Electric Power Co., LTD. Nanjing Power Supply Branch, Nanjing (CN); State Grid Jiangsu Electric Power Co., LTD. Shuangchuang Center, Nanjing (CN); and State Grid Jiangsu Electric Power Co., LTD, Nanjing (CN)
Filed by State Grid Jiangsu Electric Power Co., LTD, Nanjing Power Supply Branch, Jiangsu (CN); State Grid Jiangsu Electric Power Co., LTD, Shuangchuang Center, Jiangsu (CN); and State Grid Jiangsu Electric Power Co., LTD, Jiangsu (CN)
Filed on Feb. 6, 2023, as Appl. No. 18/164,859.
Claims priority of application No. 202210765232.0 (CN), filed on Jul. 1, 2022.
Prior Publication US 2024/0006925 A1, Jan. 4, 2024
Int. Cl. H02J 50/30 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/30 (2016.02) [H02J 50/80 (2016.02); H02J 50/90 (2016.02)] 10 Claims
OG exemplary drawing
 
1. A method for laser wireless power transmission based on power acquisition on power lines, which is achieved by a laser wireless power transmission device, and the device includes a power transmitter and a power receiver;
the power transmitter, hanging on a power transmission line (206), includes an on line induction power acquisition module (101), a semiconductor laser, a communication module, a two-dimensional pan-tilt, a beam shaping module, and a control unit;
the on line induction power acquisition module, positioned fixedly on the power transmission line for induction power acquisition, supplies power for the power transmitter; the semiconductor laser emits a laser beam from a fiber output head and the beam shaping module to a four-quadrant photovoltaic panel at the power receiver via fiber coupling; the fiber output head and the beam shaping module are arranged on the two-dimensional pan-tilt fixedly; the beam shaping module has a video image module and an IMU module fixedly positioned thereon; the control unit connects with the on line induction power acquisition module, the semiconductor laser, the communication module, the two-dimensional pan-tilt, the beam shaping module, the video image module, and the IMU module so as to realize laser wireless power transmission control;
the power receiver, installed on a tower, includes the four-quadrant photovoltaic panel, a DCDC module, a wireless monitoring module, and a tower end battery;
an output end of the power supply of the four-quadrant photovoltaic panel connects to an input end of the battery via the DCDC module, and an output end of the battery connects to an electrical equipment;
the wireless monitoring module real-time monitors an output voltage of the tower end battery and an outputting current of each quadrant of the four-quadrant photovoltaic panel;
the beam shaping module includes optical lenses and is provided with a safety management module thereon;
the safety management module monitors areas containing laser beams when the semiconductor laser be turned on; when the safety management module detects a person entering the monitored areas, an alarm is issued, and the control unit controls the semiconductor laser to stop emitting laser and allows laser to be emitted continuously to charging power until the person exits the monitored areas;
control modes of the working state of the semiconductor laser include:
i. manually controlling the semiconductor laser to be turned on or off;
ii. the control unit automatically controlling the semiconductor laser to be turned on or off based on the real-time monitoring data of the wireless monitoring module or preset charging and power supply time information;
iii. the control unit monitoring the safety conditions of the external environment through the safety management module, and automatically controlling the semiconductor laser to be turned on or off according to the safety conditions of the external environment;
wherein, the method for laser wireless power transmission based on power acquisition on power lines, comprising:
A. manually controlling the rotation of the two-dimensional pan-tilt, so that the center of the video image field of view is aligned with the preset position on the four-quadrant photocell panel,
B. adjusting the position of the internal lens of the beam shaping module, changing the laser spot size of the power receiver, and adjusting and enlarging the laser spot to basically cover the four-quadrant photovoltaic panel,
C. calculating, by the control unit, the output current difference of each quadrant of the four-quadrant photocell panel in real time according to the PID algorithm and adjusting the rotation angle of the two-dimensional pan-tilt so that the center of the laser spot is irradiated on the center of the four-quadrant photocell panel, and recording the spatial position information of the laser wireless power transmission device's components;
D. after completing the pre-adjustment of steps A to C, the laser wireless power transmission device enters a normal state, the semiconductor laser is turned off, and other device components are turned on; when the power supply conditions are met, turning on the semiconductor laser for wireless power supplying.