Detecting device removal from surface of multi-coil wireless charging device

• Main Authors: WINTERS JUSTIN, GOODCHILD, ERIC, H, SCOTT JAMES
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

Systems, methods, and devices for wireless charging are disclosed. The charging device has a plurality of charging units disposed on a charging surface, a charging circuit, and a controller. The controller may be configured to cause the charging circuit to provide a charging current to the resonant circuit when the receiving device is placed on the charging device; detecting a change or rate of change in a voltage or current level associated with the resonant circuit or a change or rate of change in power delivered to the receiving device; and determining that the receiving device has been removed from the charging device when the change or rate of change in the voltage or current level or the change or rate of change in power delivered to the receiving device exceeds a threshold. 公开了用于无线充电的系统、方法以及设备。充电装置具有设置在充电表面上的多个充电单元、充电电路以及控制器。可以将该控制器配置成，使充电电路在将接收装置置于充电装置上时，向谐振电路提供充电电流；检测与谐振电路关联的电压或电流水平的变化或变化率或者向接收装置传递的功率的变化或变化率；以及当电压或电流水平的变化或变化率或者向接收装置传递的功率的变化或变化率超过阈值时，确定接收装置已经被从充电装置移除。