Wireless Power Receiver Backup Battery Hybrid Charging
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Solution Overview
Problem
Portable electronic devices often run out of power due to frequent usage, and existing wireless power transmission methods may not function when the transmitter is out of range, leading to inconvenience and potential device inoperability, especially for devices with non-replaceable internal batteries.
Innovation Solution
A hybrid charging method for wireless power transmission using 'pocket-forming' that includes an additional backup battery in the receiver, allowing devices to utilize wireless power transmission when within range and providing an alternative power source when out of range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transmission is used, then power can be transmitted without physical connection, but the system becomes unreliable when transmitter and receiver are out of range
Solution Approach 1:
The patent incorporates a backup battery in the receiver that is charged in advance during wireless power transmission when in range. This backup power source acts as a cushion against future power interruptions, ensuring the device can continue operating when the transmitter goes out of range or wireless transmission fails.
2Duration of action of moving object
If battery capacity is increased to extend usage time, then device can operate longer without charging, but the device weight and size increase
Solution Approach 1:
The system dynamically manages power between the main battery and backup battery based on real-time conditions. The backup battery is charged during periods of wireless power availability and discharged when needed, creating a flexible power architecture that extends operational duration without requiring a single large-capacity battery that would increase weight.
3Device complexity
If internal battery is made non-replaceable for device integration, then device structure is simplified, but battery replacement and repair become difficult
Solution Approach 1:
The power system is segmented into multiple independent battery units (main battery and backup battery) within the integrated receiver. This segmentation allows the backup battery to be independently replaced or serviced without affecting the main battery or other device components, maintaining ease of repair while preserving device structural integration.
Data Source
AI summary
The present disclosure provides devices and methods for wireless power transmission. These devices and methods may extend the battery life of electronic devices such as tablets, smartphones, Bluetooth headsets, smart-watches among others. An example method may include, when a receiver coupled to an electronic device is within a threshold distance from a transmitter: (i) receiving a plurality of wireless power transmission waves transmitted by the transmitter, (ii) converting the plurality of wireless power transmission waves into usable electricity, and (iii) providing the usable electricity to a backup battery of the receiver to at least partially charge the backup battery. Further, when the receiver is not within the threshold distance from the transmitter, and after providing the usable electricity to the backup battery to at least partially charge the backup battery, draining the backup battery to provide power to the battery of the electronic device.